@inproceedings{GutekunstGeussRauhoeftetal.2014, author = {Gutekunst, Matthias and Geuss, Michael and Rauhoeft, Greg and Stefanucci, Jeanine and Kloos, Uwe and Mohler, Betty}, title = {A video self-avatar influences the perception of heights in an augmented reality oculus rift}, series = {24th International Conference on Artificial Reality and Telexistence : 19th Eurographics Symposium on Virtual Environments ; Bremen, Germany, December 8th - 10th, 2014}, booktitle = {24th International Conference on Artificial Reality and Telexistence : 19th Eurographics Symposium on Virtual Environments ; Bremen, Germany, December 8th - 10th, 2014}, editor = {Nojima, Takuya and Reiners, Dirk and Staadt, Oliver}, publisher = {Eurographics Association}, address = {Goslar}, isbn = {978-3-905674-65-1}, doi = {10.2312/ve.20141358}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-1783}, pages = {9 -- 12}, year = {2014}, abstract = {This paper compares the influence a video self-avatar and a lack of a visual representation of a body have on height estimation when standing at a virtual visual cliff. A height estimation experiment was conducted using a custom augmented reality Oculus Rift hardware and software prototype also described in this paper. The results show a consistency with previous research demonstrating that the presence of a visual body influences height estimates, just as it has been shown to influence distance estimates and affordance estimates.}, language = {en} } @article{SchieleLauxConnolly2014, author = {Schiele, Felix and Laux, Friedrich and Connolly, Thomas}, title = {Applying a layered model for knowledge transfer to business process modelling (BPM)}, series = {International journal on advances in intelligent systems}, volume = {7}, journal = {International journal on advances in intelligent systems}, number = {1 \& 2}, organization = {International Academy, Research, and Industry Association (IARIA)}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-985}, pages = {156 -- 166}, year = {2014}, abstract = {Knowledge transfer is very important to our knowledge-based society and many approaches have been proposed to describe this transfer. However, these approaches take a rather abstract view on knowledge transfer, which makes implementation difficult. In order to address this issue, we introduce a layered model for knowledge transfer that structures the individual steps of knowledge transfer in more detail. This paper gives a description of the process and also an example of the application of the layered model for knowledge transfer. The example is located in the area of business process modelling. Business processes contain the important knowledge describing the procedures of the company to produce products and services. Knowledge transfer is the fundamental basis in the modelling and usage of Business processes, which makes it an interesting use case for the layered model for knowledge transfer.}, language = {en} } @article{Roth2014, author = {Roth, Armin}, title = {Conception of a holistic and long-term performance management : five part disciplines as systematizing framework}, series = {Quarterly Review of Business Disciplines}, volume = {1}, journal = {Quarterly Review of Business Disciplines}, number = {2}, publisher = {International Academy of Business Disciplines}, issn = {2334-0169}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-1046}, pages = {127 -- 137}, year = {2014}, abstract = {Many companies practice performance management in the framework of a heterogeneous, grown mix of numerous separate decisions, instruments, processes and systems and not in terms of a strategically and systematically planned management system. Due to the inefficiency of the above mentioned performance management style, a holistic and integrated approach is a key factor. Performance management must be able to meet central objectives and requirements and set the groundwork for long-term corporate success. This article presents a central approach of the conception of holistic and long-term performance management. The five equal part disciplines are illustrated and demonstrate the issue and composition complexity of a performance management due to their characteristics and combination. The objective of this article is to display and communicate the performance management issue and its context through an easily comprehensible system without following a general recipe.}, language = {en} } @inproceedings{JugelSandkuhlZimmermann2014, author = {Jugel, Dierk and Sandkuhl, Kurt and Zimmermann, Alfred}, title = {Towards visual EAM analytics : explorative research study with master students}, series = {Proceedings of the 7th International Workshop on Information Logistics and Knowledge Supply (ILOG 2014), Lund, Sweden, September 22nd, 2014 : CEUR workshop proceedings ; 1246}, booktitle = {Proceedings of the 7th International Workshop on Information Logistics and Knowledge Supply (ILOG 2014), Lund, Sweden, September 22nd, 2014 : CEUR workshop proceedings ; 1246}, editor = {Sandkuhl, Kurt and Seigerroth, Ulf}, publisher = {RWTH}, address = {Aachen}, issn = {1613-0073}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-1510}, pages = {13 -- 21}, year = {2014}, abstract = {Enterprise Architectures (EA) consists of many architecture elements, which stand in manifold relationships to each other. Therefore Architecture Analysis is important and very difficult for stakeholders. Due changing an architecture element has impacts on other elements different stakeholders are involved. In practice EAs are often analyzed using visualizations. This article aims at contributing to the field of visual analytics in EAM by analyzing how state of-the-art software platforms in EAM support stakeholders with respect to providing and visualizing the "right" information for decision-making tasks. We investigate the collaborative decision-making process in an experiment with master students using professional EAM tools by developing a research study and accomplishing them in a master's level class with students.}, language = {en} } @inproceedings{JugelSchweda2014, author = {Jugel, Dierk and Schweda, Christian}, title = {Interactive functions of a cockpit for enterprise architecture planning}, series = {2014 IEEE 18th International Enterprise Distributed Object Computing Conference workshops and demonstrations (EDOCW 2014)}, booktitle = {2014 IEEE 18th International Enterprise Distributed Object Computing Conference workshops and demonstrations (EDOCW 2014)}, publisher = {IEEE}, address = {Piscataway, NJ}, isbn = {978-1-4799-5468-1}, doi = {10.1109/EDOCW.2014.14}, pages = {33 -- 40}, year = {2014}, abstract = {Analysis and planning of Enterprise Architectures (EA) is a complex task for stakeholders. The change of one architecture element has impact on multiple other elements because of manifold relationships and interactions between them. The interactive cockpit approach presented in this paper supports stakeholders planning and analyzing EAs and to tackle the intrinsic complexity. This approach supplies a cockpit with multiple viewpoints to put relevant information side-by-side without losing the context combined with interaction functionality. In this paper, we develop such cockpit starting with relevant use cases, describing a potential design based on well-established foundations in EA modeling, and outline an exemplary usage scenario.}, language = {en} } @article{SchaidnagelConnollyLaux2014, author = {Schaidnagel, Michael and Connolly, Thomas and Laux, Friedrich}, title = {Framework for adaptive sequential pattern recognition applied onc credit card fraud detection in the online games industry}, series = {International Journal on Advances in Software}, volume = {7}, journal = {International Journal on Advances in Software}, number = {3 \& 4}, organization = {International Academy, Research, and Industry Association (IARIA)}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-868}, pages = {422 -- 434}, year = {2014}, abstract = {Online credit card fraud presents a significant challenge in the field of eCommerce. In 2012 alone, the total loss due to credit card fraud in the US amounted to \$ 54 billion. Especially online games merchants have difficulties applying standard fraud detection algorithms to achieve timely and accurate detection. This paper describes the Special constrains of this domain and highlights the reasons why conventional algorithms are not quite effective to deal with this problem. Our suggested solution for the problem originates from the fields of feature construction joined with the field of temporal sequence data mining. We present Feature construction techniques, which are able to create discriminative features based on a sequence of transaction and are able to incorporate the time into the classification process. In addition to that, a framework is presented that allows for an automated and adaptive change of features in case the underlying pattern is changing.}, language = {en} } @article{YayMartinezMadridOrtegaRamirez2014, author = {Yay, Emre and Mart{\´i}nez Madrid, Natividad and Ortega Ram{\´i}rez, Juan Antonio}, title = {Using an improved rule match algorithm in an expert system to detect broken driving rules for an energy-efficiency and safety relevant driving system}, series = {Procedia computer science}, volume = {35}, journal = {Procedia computer science}, number = {Knowledge-Based and Intelligent Information \& Engineering Systems 18th Annual Conference, Gdynia, Poland, September 2014 : Proceedings}, publisher = {Elsevier}, address = {Amsterdam}, doi = {10.1016/j.procs.2014.08.092}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-872}, pages = {127 -- 136}, year = {2014}, abstract = {Vehicles have been so far improved in terms of energy-efficiency and safety mainly by optimising the engine and the power train. However, there are opportunities to increase energy-efficiency and safety by adapting the individual driving behaviour in the given driving situation. In this paper, an improved rule match algorithm is introduced, which is used in the expert system of a human-centred driving system. The goal of the driving system is to optimise the driving behaviour in terms of energy-efficiency and safety by giving recommendations to the driver. The improved rule match algorithm checks the incoming information against the driving rules to recognise any breakings of a driving rule. The needed information is obtained by monitoring the driver, the current driving situation as well as the car, using in-vehicle sensors and serial-bus systems. On the basis of the detected broken driving rules, the expert system will create individual recommendations in terms of energy-efficiency and safety, which will allow eliminating bad driving habits, while considering the driver needs.}, language = {en} } @article{SchaidnagelConnollyLaux2014, author = {Schaidnagel, Michael and Connolly, Thomas and Laux, Friedrich}, title = {Automated feature construction for classification of time ordered data sequences}, series = {International Journal on Advances in Software}, volume = {7}, journal = {International Journal on Advances in Software}, number = {3 \& 4}, organization = {International Academy, Research, and Industry Association (IARIA)}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-885}, pages = {632 -- 641}, year = {2014}, abstract = {The recent years and especially the Internet have changed the ways in which data is stored. It is now common to store data in the form of transactions, together with ist creation time-stamp. These transactions can often be attributed to Logical units, e.g., all transactions that belong to one customer. These groups, we refer to them as data sequences, have a more complex structure than tuple-based data. This makes it more difficult to find discriminatory patterns for classification purposes. However, the complex structure potentially enables us to track behaviour and its change over the course of time. This is quite interesting, especially in the e-commerce area, in which classification of a sequence of customer actions is still a challenging task for data miners. However, before standard algorithms such as Decision Trees, Neural Nets, Naive Bayes or Bayesian Belief Networks can be applied on sequential data, preparations are required in order to capture the information stored within the sequences. Therefore, this work presents a systematic approach on how to reveal sequence patterns among data and how to construct powerful features out of the primitive sequence attributes. This is achieved by sequence aggregation and the incorporation of time dimension into the feature construction step. The proposed algorithm is described in detail and applied on a real-life data set, which demonstrates the ability of the proposed algorithm to boost the classification performance of well-known data mining algorithms for binary classification tasks.}, language = {en} } @article{SachsenSenfBurgertetal.2014, author = {Sachsen, Sandra von and Senf, Bj{\"o}rn and Burgert, Oliver and Meixensberger, J{\"u}rgen and Florek, Hans-Joachim and Mohr, Friedrich-Wilhelm and Etz, Christian}, title = {Stent graft visualization and planning tool for endovascular surgery using finite element analysis}, series = {International journal of computer assisted radiology and surgery}, volume = {9}, journal = {International journal of computer assisted radiology and surgery}, number = {4}, publisher = {Springer}, address = {Berlin}, issn = {1861-6410}, doi = {10.1007/s11548-013-0943-2}, pages = {617 -- 633}, year = {2014}, abstract = {Purpose: A new approach to optimize stent graft selection for endovascular aortic repair is the use of finite element analysis. Once the finite element model is created and solved, a software module is needed to view the simulation results in the clinical work environment. A new tool for Interpretation of simulation results, named Medical Postprocessor, that enables comparison of different stent graft configurations and products was designed, implemented and tested. Methods Aortic endovascular stent graft ring forces and sealing states in the vessel landing zone of three different configurations were provided in a surgical planning software using the Medical Imaging Interaction Tool Kit (MITK) Software system. For data interpretation, software modules for 2D and 3D presentations were implemented. Ten surgeons evaluated the software features of the Medical Postprocessor. These surgeons performed usability tests and answered questionnaires based on their experience with the system. Results: The Medical Postprocessor visualization system enabled vascular surgeons to determine the configuration with the highest overall fixation force in 16 ± 6 s, best proximal sealing in 56±24 s and highest proximal fixation force in 38 ± 12 s. The majority considered the multiformat data provided helpful and found the Medical Postprocessor to be an efficient decision support system for stent graft selection. The evaluation of the user interface results in an ISONORMconform user interface (113.5 points). Conclusion: The Medical Postprocessor visualization Software tool for analyzing stent graft properties was evaluated by vascular surgeons. The results show that the software can assist the interpretation of simulation results to optimize stent graft configuration and sizing.}, language = {en} } @incollection{MauserBurgert2014, author = {Mauser, Stanislas and Burgert, Oliver}, title = {Touch-free, gesture-based control of medical devices and software based on the leap motion controller}, series = {Medicine Meets Virtual Reality 21}, booktitle = {Medicine Meets Virtual Reality 21}, editor = {Westwood, James and Fell{\"a}nder-Tsai, Li and Haluck, Randy and Westwood, Susan}, publisher = {IOS Press}, address = {Amsterdam}, isbn = {978-1-61499-375-9}, doi = {10.3233/978-1-61499-375-9-265}, pages = {265 -- 270}, year = {2014}, abstract = {There are several intra-operative use cases which require the surgeon to interact with medical devices. We used the Leap Motion Controller as input device and implemented two use-cases: 2D-Interaction (e.g. advancing EPR data) and selection of a value (e.g. room illumination brightness). The gesture detection was successful and we mapped its output to several devices and systems.}, language = {en} } @article{KararFalkBurgert2014, author = {Karar, Mohamed Esmail and Falk, Volkmar and Burgert, Oliver}, title = {Intra-operative fluoroscopy-guided assistance system for transcatheter aortic valve implantation}, series = {International journal of computer assisted radiology and surgery}, volume = {9}, journal = {International journal of computer assisted radiology and surgery}, number = {Supplement 1}, publisher = {Springer}, address = {Berlin}, issn = {1861-6410}, doi = {10.1007/s11548-014-1027-7}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-460}, pages = {109 -- 110}, year = {2014}, abstract = {A new surgical assistance system has been developed to assist the correct positioning of the AVP during transapical TAVI. The developed assistance system automatically defines the target area for implanting the AVP under live 2-D fluoroscopy guidance. Moreover, this surgical assistance system works with low levels of contrast agent for the final deployment of AVP, reducing therefore long-term negative effects, such as renal failure in the elderly and high-risk patients.}, language = {en} } @article{SchaidnagelLaux2013, author = {Schaidnagel, Michael and Laux, Friedrich}, title = {Time series prediction with automated periodicity detection}, series = {International journal on advances in systems and measurements}, volume = {6}, journal = {International journal on advances in systems and measurements}, number = {3 \& 4}, organization = {International Academy, Research, and Industry Association (IARIA)}, issn = {1942-261x}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-1135}, pages = {394 -- 404}, year = {2013}, abstract = {When forecasting sales figures, not only the sales history but also the future price of a product will influence the sales quantity. At first sight, multivariate time series seem to be the appropriate model for this task. Nonetheless, in real life history is not always repeatable, i.e., in the case of sales history there is only one price for a product at a given time. This complicates the design of a multivariate time series. However, for some seasonal or perishable products the price is rather a function of the expiration date than of the sales history. This additional information can help to design a more accurate and causal time series model. The proposed solution uses an univariate time series model but takes the price of a product as a parameter that influences systematically the prediction based on a calculated periodicity. The price influence is computed based on historical sales data using correlation analysis and adjustable price ranges to identify products with comparable history. The periodicity is calculated based on a novel approach that is based on data folding and Pearson Correlation. Compared to other techniques this approach is easy to compute and allows to preset the price parameter for predictions and simulations. Tests with data from the Data Mining Cup 2012 as well as artificial data demonstrate better results than established sophisticated time series methods.}, language = {en} } @inproceedings{BurgertFinkWiemuthetal.2014, author = {Burgert, Oliver and Fink, Elena and Wiemuth, Markus and Thies, Christian}, title = {A model-guided peri-operative information systems approach : steps towards the fusion of model-guided therapy and workflow management systems}, series = {2014 Cairo International Biomedical Engineering Conference (CIBEC) : 11 - 13 Dec. 2014, Giza, Egypt}, booktitle = {2014 Cairo International Biomedical Engineering Conference (CIBEC) : 11 - 13 Dec. 2014, Giza, Egypt}, publisher = {IEEE}, address = {Piscataway, NJ}, isbn = {978-1-4799-4412-5}, doi = {10.1109/CIBEC.2014.7020926}, pages = {95 -- 98}, year = {2014}, abstract = {Model-guided Therapy and Surgical Workflow Systems are two interrelated research fields, which have been developed separately in the last years. To make full use of both technologies, it is necessary to integrate them and connect them to Hospital Information Systems. We propose a framework for integration of Model-guided Therapy in Hospital Information Systems based on the Electronic Medical Record, and a taskbased Workflow Management System, which is suitable for clinical end users. Two prototypes - one based on Business Process Modeling Language, one based on the serum-board - are presented. From the experience with these prototypes, we developed a novel personalized visualization system for Surgical Workflows and Model-guided Therapy. Key challenges for further development are automated situation detection and a common communication infrastructure.}, language = {en} } @inproceedings{WiemuthBurgert2014, author = {Wiemuth, Markus and Burgert, Oliver}, title = {Design and implementation of a task manager prototype for the operation room}, series = {CURAC 2014 : Synergie durch Interdisziplinarit{\"a}t ; 13. Jahrestagung der Deutschen Gesellschaft f{\"u}r Computer- und Roboterassistierte Chirurgie ; 11.-13. September 2014, M{\"u}nchen}, booktitle = {CURAC 2014 : Synergie durch Interdisziplinarit{\"a}t ; 13. Jahrestagung der Deutschen Gesellschaft f{\"u}r Computer- und Roboterassistierte Chirurgie ; 11.-13. September 2014, M{\"u}nchen}, editor = {Feußner, Hubertus}, organization = {Deutsche Gesellschaft f{\"u}r Computer- und Roboterassistierte Chirurgie (CURAC)}, isbn = {978-3-00-047154-4}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-1246}, pages = {173 -- 176}, year = {2014}, abstract = {An operation room is a stressful work environment. Nevertheless, all involved persons have to work safely as there is no space for making mistakes. To ensure a high level of concentration and seamless interaction, all involved persons have to know their own tasks and tasks of their colleagues. The entire team must work synchronously at all times. However, the operation room (OR) is a noisy environment and the actors have to set their focus on their work. To optimize the overall workflow, a task manager supporting the team was developed. Each actor is equipped with a client terminal showing a summary of their own tasks. Moreover, a big screen displays all tasks of all actors. The architecture is a distributed system based on a communication framework that supports the interaction of all clients with the task manager. A prototype of the task manager and several clients have been developed and implemented. The system represents a proof-of-concept for further development. This paper describes the concept of the task manager.}, language = {en} } @inproceedings{OPUS4-185, title = {DBKDA 2014 : the Sixth International Conference on Advanced in Databases, Knowledge, and Data Applications, April 20 - 24, 2014, Chamonix, France}, editor = {Laux, Friedrich and Schmidt, Andreas and Nitta, Kiyoshi and Savnik, Iztok}, organization = {International Academy, Research, and Industry Association (IARIA)}, isbn = {978-1-61208-334-6}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-1852}, pages = {164}, year = {2014}, abstract = {The Sixth International Conference on Advances in Databases, Knowledge, and Data Applications (DBKDA 2014), held between April 20 - 24, 2014 in Chamonix, France, continued a series of international events covering a large spectrum of topics related to advances in fundamentals on databases, evolution of relation between databases and other domains, data base technologies and content processing, as well as specifics in applications domains databases. Advances in different technologies and domains related to databases triggered substantial improvements for content processing, information indexing, and data, process and knowledge mining. The push came from Web services, artificial intelligence, and agent technologies, as well as from the generalization of the XML adoption. High-speed communications and computations, large storage capacities, and loadbalancing for distributed databases access allow new approaches for content processing with incomplete patterns, advanced ranking algorithms and advanced indexing methods. Evolution on e-business, ehealth and telemedicine, bioinformatics, finance and marketing, geographical positioning systems put pressure on database communities to push the 'de facto' methods to support new requirements in terms of scalability, privacy, performance, indexing, and heterogeneity of both content and technology.}, language = {en} } @inproceedings{OPUS4-276, title = {Proceedings of the International Workshop on Mobile Networks for Biometric Data Analysis (mBiDA)}, editor = {Conti, Massimo and Orcioni, Simone and Mart{\´i}nez Madrid, Natividad and Seepold, Ralf}, publisher = {Universit{\`a} Politecnica delle Marche}, address = {Ancona}, isbn = {978-88-87548-04-4}, pages = {283}, year = {2014}, abstract = {Prevention and treatment of common and widesprea (chronic) diseases is a challenge in any modern Society and vitally important for health maintenance in aging societies. Capturing biometric data is a cornerstone for any analysis and Treatment strategy. Latest advances in sensor technology allow accurate data measurement in a non-intrusive way. In many cases, it is necessary to provide online monitoring and real-time data capturing to support patients´ prevention plans or to allow medical professionals to access the current status. Different communication standards are required to push sensor data and to store and analyze them on different (mobile) platforms. The objective of the workshop is to show new and innovative approaches dedicated to biometric data capture and analysis in a non-intrusive way maintaining mobility. Examples can be found in human centered ambient intelligence attributed with sensors or even in methodologies applied in automotive real-time conform mobile system design. The workshop´s main challenge is to focus on approaches promoting non-intrusiveness, reliable prediction algorithms and high user-acceptance. The workshop will provide overview presentations, Young researcher poster tracks, doctoral tracks and classical peer-review full paper tracks. Especially, would like to encourage students and young researchers to participate and to contribute to the workshop. Scientific contributions to the event are peer-reviewed by a suited program committee.}, language = {en} } @inproceedings{WalzerMartinezMadridYay2014, author = {Walzer, Thomas and Mart{\´i}nez Madrid, Natividad and Yay, Emre}, title = {"eKlarA" - a clothing cycle assistant system supporting functionally impaired people}, series = {Proceedings of the International Workshop on Mobile Networks for Biometric Data Analysis (mBiDA)}, booktitle = {Proceedings of the International Workshop on Mobile Networks for Biometric Data Analysis (mBiDA)}, editor = {Conti, Massimo and Orcioni, Simone and Mart{\´i}nez Madrid, Natividad and Seepold, Ralf}, publisher = {Universit{\`a} Politecnica delle Marche}, address = {Ancona}, isbn = {978-88-87548-04-4}, pages = {45 -- 49}, year = {2014}, abstract = {Functionally impaired people have problems with choosing and finding the right clothing. So, they need help in their daily life to wash and manage the clothing. The goal of this work is to support the user by giving recommendations to choose the right clothing, to find the clothing and how to wash the clothing. The idea behind eKlarA is to generate a gateway based system that uses sensors to identify the clothing and their state in the clothing cycle. The clothing cycle consists of (one and more) closet, laundry basket and washing machine in one or several places. The gateway uses the information about the clothing, weather and calendar to support the user in the different steps of the clothing cycle. This allows to give more freedom to the functionally impaired people in their daily life.}, language = {en} } @inproceedings{YayMartinezMadrid2014, author = {Yay, Emre and Mart{\´i}nez Madrid, Natividad}, title = {Considering driver stress to increase the user acceptance while generating recommendations in an energy-efficiency and safety relevant driving system}, series = {Proceedings of the International Workshop on Mobile Networks for Biometric Data Analysis (mBiDA)}, booktitle = {Proceedings of the International Workshop on Mobile Networks for Biometric Data Analysis (mBiDA)}, editor = {Conti, Massimo and Orcioni, Simone and Mart{\´i}nez Madrid, Natividad and Seepold, Ralf}, publisher = {Universit{\`a} Politecnica delle Marche}, address = {Ancona}, isbn = {978-88-87548-04-4}, pages = {51 -- 58}, year = {2014}, abstract = {Besides the optimisation of the car, energy-efficiency and safety can also be increased by optimising the driving behaviour. Based on this fact, a driving system is in development whose goal is to educate the driver in energy-efficient and safe driving. It monitors the driver, the car and the environment and gives energy-efficiency and safety relevant recommendations. However, the driving system tries not to distract or bother the driver by giving recommendations for example during stressful driving situations or when the driver is not interested in that recommendation. Therefore, the driving system monitors the stress level of the driver as well as the reaction of the driver to a given recommendation and decides whether to give a recommendation or not. This allows to suppress recommendations when needed and, thus, to increase the road safety and the user acceptance of the driving system.}, language = {en} } @inproceedings{GottsteinGoyalHardocketal.2014, author = {Gottstein, Robert and Goyal, Rohit and Hardock, Sergej and Petrov, Ilia and Buchmann, Alejandro}, title = {MV-IDX : indexing in multi-version databases}, series = {Proceedings of the 18th International Database Engineering \& Applications Symposium : IDEAS '14 : Instituto Superior de Engenharia do Porto : Porto, Portugal, July 7-9, 2014}, volume = {2014}, booktitle = {Proceedings of the 18th International Database Engineering \& Applications Symposium : IDEAS '14 : Instituto Superior de Engenharia do Porto : Porto, Portugal, July 7-9, 2014}, number = {7}, publisher = {ACM}, address = {New York}, isbn = {978-1-4503-2627-8}, doi = {10.1145/2628194.2628911}, pages = {142 -- 148}, year = {2014}, abstract = {An index in a Multi-Version DBMS (MV-DBMS) has to reflect different tuple versions of a single data item. Existing approaches follow the paradigm of logically separating the tuple version data from the data item, e.g. an index is only allowed to return at most one version of a single data item (while it may return multiple data items that match a search criteria). Hence to determine the valid (and therefore visible) tuple version of a data item, the MV-DBMS first fetches all tuple versions that match the search criteria and subsequently filters visible versions using visibility checks. This involves I/O storage accesses to tuple versions that do not have to be fetched. In this vision paper we present the Multi Version Index (MV-IDX) approach that allows index-only visibility checks which significantly reduce the amount of I/O storage accesses as well as the index maintenance overhead. The MV-IDX achieves significantly lower response times and higher transactional throughput on OLTP workloads.}, language = {en} } @incollection{NawazPetrovBuchmann2014, author = {Nawaz, Khalid and Petrov, Ilia and Buchmann, Alejandro}, title = {Configurable, energy-efficient, application- and channel-aware middleware approaches for cyber-physical systems}, series = {Computational intelligence for decision support in cyber-physical systems}, booktitle = {Computational intelligence for decision support in cyber-physical systems}, editor = {Khan, Zeashan and Ali, Shawkat and Riaz, Zahid}, publisher = {Springer}, address = {Singapore}, isbn = {978-981-4585-35-4}, doi = {10.1007/978-981-4585-36-1_1}, pages = {3 -- 65}, year = {2014}, abstract = {The use of Wireless Sensor and Actuator Networks (WSAN) as an enabling technology for Cyber-Physical Systems has increased significantly in recent past. The challenges that arise in different application areas of Cyber- Physical Systems, in general, and in WSAN in particular, are getting the attention of academia and industry both. Since reliability issues for message delivery in wireless communication are of critical importance for certain safety related applications, it is one of the areas that has received significant focus in the research community. Additionally, the diverse needs of different applications put different demands on the lower layers in the protocol stack, thus necessitating such mechanisms in place in the lower layers which enable them to dynamically adapt. Another major issue in the realization of networked wirelessly communicating cyber-physical systems, in general, and WSAN, in particular, is the lack of approaches that tackle the reliability, configurability and application awareness issues together. One could consider tackling these issues in isolation. However, the interplay between these issues create such challenges that make the application developers spend more time on meeting these challenges, and that too not in very optimal ways, than spending their time on solving the problems related to the application being developed. Starting from some fundamental concepts, general issues and problems in cyber-physical systems, this chapter discusses such issues like energy-efficiency, application and channel-awareness for networked wirelessly communicating cyber-physical systems. Additionally, the chapter describes a middleware approach called CEACH, which is an acronym for Configurable, Energy-efficient, Application- and Channel-aware Clustering based middleware service for cyber-physical systems. The state of-the art in the area of cyberphysical systems with a special focus on communication reliability, configurability, application- and channel-awareness is described in the chapter. The chapter also describes how these features have been considered in the CEACH approach. Important node level and network level characteristics and their significance vis-{\`a}vis the design of applications for cyber physical systems is also discussed. The issue of adaptively controlling the impact of these factors vis-{\`a}-vis the application demands and network conditions is also discussed. The chapter also includes a description of Fuzzy-CEACH which is an extension of CEACH middleware service and which uses fuzzy logic principles. The fuzzy descriptors used in different stages of Fuzzy-CEACH have also been described. The fuzzy inference engine used in the Fuzzy-CEACH cluster head election process is described in detail. The Rule-Bases used by fuzzy inference engine in different stages of Fuzzy-CEACH is also included to show an insightful description of the protocol. The chapter also discusses in detail the experimental results validating the authenticity of the presented concepts in the CEACH approach. The applicability of the CEACH middleware service in different application scenarios in the domain of cyberphysical systems is also discussed. The chapter concludes by shedding light on the Publish-Subscribe mechanisms in distributed event-based systems and showing how they can make use of the CEACH middleware to reliably communicate detected events to the event-consumers or the actuators if the WSAN is modeled as a distributed event-based system.}, language = {en} } @inproceedings{OPUS4-232, title = {AITA 2013 : Workshop on ambient intelligence for telemedicine and automotive}, editor = {Mart{\´i}nez Madrid, Natividad and Seepold, Ralf and Ortega, Juan Antonio}, isbn = {978-84-697-0147-8}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-2326}, pages = {83}, year = {2013}, abstract = {The workshop aims to discuss leading edge contributions to the interdisciplinary research area of ambient intelligence (AmI) applied to the domains of telemedicine and driving assistance. AmI refers to human centered environments attributed with sensors. The development of AmI in the two application domains of the workshop shares several commonalities: the extensive usage of networked devices and sensors, the design of artificial intelligence algorithms for diagnosis, including recommendation systems and qualitative reasoning or the application of mobile and wireless communication to their distributed systems. Together with the presentation of common aspects of Ambient Intelligence, a further goal of the workshop is to stimulate synergies among both application domains and present examples. The telemedicine domain can benefit from methodologies in designing complex devices, real-time conform system design, audiovisual or computer vision system design used in automotive driving assistance. Furthermore, the automotive domain can benefit from the usercentric view, biometric sensor data design, multi-user data bases for aggregation and diagnosis using big data like used in telemedicine. The German Government supports these research lines in its Hightec-Strategie under the domains "Health and Nutrition" and "Climate and Energy". In Spain the term "Spanish Program for R\&D Challenged Oriented Society - Challenge in energy safe, efficient and clean \& Challenge in sustainable transport, smart and integrated" is used. Scientific contributions to the event are peer-reviewed by a suited program committee having members from Germany and Spain. The same committee is serving the JARCA workshop (Jornadas sobre Sistemas cualitativos y sus Aplicaciones en Diagnosis, Rob{\´o}tica e Inteligencia Ambiental - Conference on Qualitative Systems and their Applications in Diagnoses, Robotics and Ambient Intelligence) since 15 years. This workshop is sponsored by the German Academic Exchange Service (DAAD) under contract number 57070010.}, language = {en} } @inproceedings{DatkoMartinezMadridSeepold2014, author = {Datko, Patrick and Mart{\´i}nez Madrid, Natividad and Seepold, Ralf}, title = {Intelligent generation of navigation routes based on individual stress level}, series = {Proceedings of the International Workshop on Mobile Networks for Biometric Data Analysis (mBiDA)}, booktitle = {Proceedings of the International Workshop on Mobile Networks for Biometric Data Analysis (mBiDA)}, editor = {Conti, Massimo and Orcioni, Simone and Mart{\´i}nez Madrid, Natividad and Seepold, Ralf}, publisher = {Universit{\`a} Politecnica delle Marche}, address = {Ancona}, isbn = {978-88-87548-04-4}, pages = {59 -- 67}, year = {2014}, abstract = {The impact of stress of every human being has become a serious problem. Reported impact on persons are a higher rate or health disorders like heart problems, obesity, asthma, diabetes, depressions and many others. An individual in a stressful situation has to deal with altered cognition as well as an affected decision making skill and problem solving. This could lead to a higher risk for accidents in dynamic environments such as automotive. Different papers faced the estimation as well as prediction of drivers' stress level during driving. Another important question is not only the stress level of the driver himself, but also the influence on and of a group of other drivers in the near area. This paper proposes a system, which determines a group of drivers in a near area as clusters and it derives or computes the individual stress level. This information will be analyzed to generate a stress map, which represents a graphical view about road section with a higher stress influence. Aggregated data can be used to generate navigation routes with a lower stress influence as well as recommend driving behavior to decrease stress influenced driving as well as improve road safety.}, language = {en} } @inproceedings{KolesnikMartinezMadrid2013, author = {Kolesnik, Maksim and Mart{\´i}nez Madrid, Natividad}, title = {A collaborative standard-based mobile telemonitoring platform}, series = {AITA 2013 : Workshop on Ambient Intelligence for Telemedicine and Automotive}, booktitle = {AITA 2013 : Workshop on Ambient Intelligence for Telemedicine and Automotive}, isbn = {978-84-697-0147-8}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-2123}, pages = {50 -- 55}, year = {2013}, abstract = {Telemedicine is becoming an increasingly important approach to diagnostic, treat or prevent diseases. However, the usage of Information Communication Technologies in healthcare results in a considerable amount of data that must be efficiently and securely transmitted. Many manufacturers provide telemedicine platforms without regarding interoperability, mobility and collaboration. This paper describes a collaborative mobile telemonitoring platform that can use the IEEE 11073 and HL7 communication standards or adapt proprietary protocols. The proposed platform also covers the security and modularity aspects. Furthermore this work introduces an Android-based prototype implementation}, language = {en} } @inproceedings{YayMartinezMadrid2013, author = {Yay, Emre and Mart{\´i}nez Madrid, Natividad}, title = {An adaptive driving system regarding energy-efficiency and safety}, series = {AITA 2013 : Workshop on Ambient Intelligence for Telemedicine and Automotive}, booktitle = {AITA 2013 : Workshop on Ambient Intelligence for Telemedicine and Automotive}, isbn = {978-84-697-0147-8}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-2752}, pages = {35 -- 41}, year = {2013}, abstract = {Energy-efficiency and safety became an important factor for car manufacturers. Thus, the cars have been optimised regarding the energy consumption and safety by optimising for example the power train or the engine. Besides the optimisation of the car itself, energy-efficiency and safety can also be increased by adapting the individual driving behaviour to the current driving situation. This paper introduces a driving system, which is in development. Its goal is to optimise the driving behaviour in terms of energy-efficiency and safety by giving recommendations to the driver. For the creation of a recommendation the driving system monitors the driver and the current driving situation as well as the car using in-vehicle sensors and serial-bus systems. On the basis of the acquired data, the driving system will give individual energy-efficiency and safety recommendations in real-time. This will allow eliminating bad driving habits, while considering the driver needs.}, language = {en} } @inproceedings{OPUS4-405, title = {DBKDA 2013, the Fifth International Conference on Advances in Databases, Knowledge, and Data Applications : January 27 - February 1, 2013, Seville, Spain}, editor = {Laux, Friedrich and Str{\"o}mb{\"a}ck, Lena}, organization = {International Academy, Research, and Industry Association (IARIA)}, isbn = {978-1-61208-247-9}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-4050}, pages = {258}, year = {2013}, abstract = {The Fifth International Conference on Advances in Databases, Knowledge, and Data Applications [DBKDA 2013], held between January 27th- February 1st, 2013 in Seville, Spain, continued a series of international events covering a large spectrum of topics related to advances in fundamentals on databases, evolution of relation between databases and other domains, data base technologies and content processing, as well as specifics in applications domains databases. Advances in different technologies and domains related to databases triggered substantial improvements for content processing, information indexing, and data, process and knowledge mining. The push came from Web services, artificial intelligence, and agent technologies, as well as from the generalization of the XML adoption. High-speed communications and computations, large storage capacities, and loadbalancing for distributed databases access allow new approaches for content processing with incomplete patterns, advanced ranking algorithms and advanced indexing methods. Evolution on e-business, ehealth and telemedicine, bioinformatics, finance and marketing, geographical positioning systems put pressure on database communities to push the 'de facto' methods to support new requirements in terms of scalability, privacy, performance, indexing, and heterogeneity of both content and technology. We take here the opportunity to warmly thank all the members of the DBKDA 2013 Technical Program Committee, as well as the numerous reviewers. The creation of such a high quality conference program would not have been possible without their involvement. We also kindly thank all the authors who dedicated much of their time and efforts to contribute to DBKDA 2013. We truly believe that, thanks to all these efforts, the final conference program consisted of top quality contributions. Also, this event could not have been a reality without the support of many individuals, organizations, and sponsors. We are grateful to the members of the DBKDA 2013 organizing committee for their help in handling the logistics and for their work to make this professional meeting a success. We hope that DBKDA 2013 was a successful international forum for the exchange of ideas and results between academia and industry and for the promotion of progress in the fields of databases, knowledge and data applications. We are convinced that the participants found the event useful and communications very open. We also hope the attendees enjoyed the charm of Seville, Spain.}, language = {en} } @inproceedings{GottsteinPetrovBuchmann2013, author = {Gottstein, Robert and Petrov, Ilia and Buchmann, Alejandro}, title = {Aspects of append-based database storage management on flash memories}, series = {DBKDA 2013, the Fifth International Conference on Advances in Databases, Knowledge, and Data Applications : January 27 - February 1, 2013, Seville, Spain}, booktitle = {DBKDA 2013, the Fifth International Conference on Advances in Databases, Knowledge, and Data Applications : January 27 - February 1, 2013, Seville, Spain}, editor = {Laux, Friedrich and Str{\"o}mb{\"a}ck, Lena}, organization = {International Academy, Research, and Industry Association (IARIA)}, isbn = {978-1-61208-247-9}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-4068}, pages = {125 -- 129}, year = {2013}, abstract = {New storage technologies, such as Flash and Non- Volatile Memories, with fundamentally different properties are appearing. Leveraging their performance and endurance requires a redesign of existing architecture and algorithms in modern high performance databases. Multi-Version Concurrency Control (MVCC) approaches in database systems, maintain multiple timestamped versions of a tuple. Once a transaction reads a tuple the database system tracks and returns the respective version eliminating lock-requests. Hence under MVCC reads are never blocked, which leverages well the excellent read performance (high throughput, low latency) of new storage technologies. Upon tuple updates, however, established implementations of MVCC approaches (such as Snapshot Isolation) lead to multiple random writes - caused by (i) creation of the new and (ii) in-place invalidation of the old version - thus generating suboptimal access patterns for the new storage media. The combination of an append based storage manager operating with tuple granularity and snapshot isolation addresses asymmetry and in-place updates. In this paper, we highlight novel aspects of log-based storage, in multi-version database systems on new storage media. We claim that multi-versioning and append-based storage can be used to effectively address asymmetry and endurance. We identify multi-versioning as the approach to address dataplacement in complex memory hierarchies. We focus on: version handling, (physical) version placement, compression and collocation of tuple versions on Flash storage and in complex memory hierarchies. We identify possible read- and cacherelated optimizations.}, language = {en} } @inproceedings{OPUS4-407, title = {DBKDA 2012 : the Fourth International Conference on Advances in Databases, Knowledge, and Data Applications ; February 29 - March 5, 2012, Saint Gilles, Reunion Island}, editor = {Laux, Friedrich and Elias, Gledson and Ireland, Chris}, organization = {International Academy, Research, and Industry Association (IARIA)}, isbn = {978-1-61208-185-4}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-4075}, pages = {202}, year = {2012}, abstract = {The Fourth International Conference on Advances in Databases, Knowledge, and Data Applications [DBKDA 2012], held between February 29th and March 5th, 2012 in Saint Gilles, Reunion Island, continued a series of international events covering a large spectrum of topics related to advances in fundamentals on databases, evolution of relation between databases and other domains, data base technologies and content processing, as well as specifics in applications domains databases. Advances in different technologies and domains related to databases triggered substantial improvements for content processing, information indexing, and data, process and knowledge mining. The push came from Web services, artificial intelligence, and agent technologies, as well as from the generalization of the XML adoption. High-speed communications and computations, large storage capacities, and loadbalancing for distributed databases access allow new approaches for content processing with incomplete patterns, advanced ranking algorithms and advanced indexing methods. Evolution on e-business, e-health and telemedicine, bioinformatics, finance and marketing, geographical positioning systems put pressure on database communities to push the 'de facto' methods to support new requirements in terms of scalability, privacy, performance, indexing, and heterogeneity of both content and technology. We take here the opportunity to warmly thank all the members of the DBKDA 2012 Technical Program Committee, as well as the numerous reviewers. The creation of such a broad and high quality conference program would not have been possible without their involvement. We also kindly thank all the authors who dedicated much of their time and efforts to contribute to DBKDA 2012. We truly believe that, thanks to all these efforts, the final conference program consisted of top quality contributions. Also, this event could not have been a reality without the support of many individuals, organizations, and sponsors. We are grateful to the members of the DBKDA 2012 organizing committee for their help in handling the logistics and for their work to make this professional meeting a success. We hope that DBKDA 2012 was a successful international forum for the exchange of ideas and results between academia and industry and for the promotion of progress in the fields of databases, knowledge, and data applications. We are convinced that the participants found the event useful and communications very open. We also hope the attendees enjoyed the charm of Saint Gilles, Reunion Island.}, language = {en} } @inproceedings{OPUS4-408, title = {DBKDA 2011 : the Third International Conference on Advances in Databases, Knowledge, and Data Applications ; January 23 - 28, 2011, St. Maarten, the Netherlands Antilles}, editor = {Laux, Friedrich and Str{\"o}mb{\"a}ck, Lena}, organization = {International Academy, Research, and Industry Association (IARIA)}, isbn = {978-1-61839-645-7}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-4080}, pages = {201}, year = {2011}, abstract = {The Third International Conference on Advances in Databases, Knowledge, and Data Applications (DBKDA 2011) held on January 23-27, 2011 in St. Maarten, The Netherlands Antilles, continued a series of international events covering a large spectrum of topics related to advances in fundamentals on databases, evolution of relation between databases and other domains, data base technologies and content processing, as well as specifics in applications domains databases. Advances in different technologies and domains related to databases triggered substantial improvements for content processing, information indexing, and data, process and knowledge mining. The push came from Web services, artificial intelligence, and agent technologies, as well as from the generalization of the XML adoption. High-speed communications and computations, large storage capacities, and load-balancing for distributed databases access allow new approaches for content processing with incomplete patterns, advanced ranking algorithms and advanced indexing methods. Evolution on e-business, ehealth and telemedicine, bioinformatics, finance and marketing, geographical positioning systems put pressure on database communities to push the 'de facto' methods to support new requirements in terms of scalability, privacy, performance, indexing, and heterogeneity of both content and technology. We take this opportunity to thank all the members of the DBKDA 2011 Technical Program Committee as well as the numerous reviewers. The creation of such a broad and high-quality conference program would not have been possible without their involvement. We also kindly thank all the authors who dedicated much of their time and efforts to contribute to the DBKDA 2011. We truly believe that, thanks to all these efforts, the final conference program consists of top quality contributions. This event could also not have been a reality without the support of many individuals, organizations, and sponsors. We are grateful to the members of the DBKDA 2011 organizing committee for their help in handling the logistics and for their work to make this professional meeting a success. We hope that DBKDA 2011 was a successful international forum for the exchange of ideas and results between academia and industry and for the promotion of progress in database research. We are convinced that the participants found the event useful and communications very open. The beautiful places of St. Maarten surely provided a pleasant environment during the conference and we hope you had a chance to visit the surroundings.}, language = {en} } @inproceedings{LessnerLauxConnollyetal.2011, author = {Lessner, Tim and Laux, Friedrich and Connolly, Thomas and Branki, Cherif and Crowe, Malcolm and Laiho, Martti}, title = {An optimistic transaction model for a disconnected integration architecture}, series = {DBKDA 2011 : the Third International Conference on Advances in Databases, Knowledge, and Data Applications ; January 23 - 28, 2011, St. Maarten, the Netherlands Antilles}, booktitle = {DBKDA 2011 : the Third International Conference on Advances in Databases, Knowledge, and Data Applications ; January 23 - 28, 2011, St. Maarten, the Netherlands Antilles}, editor = {Laux, Friedrich and Str{\"o}mb{\"a}ck, Lena}, organization = {International Academy, Research, and Industry Association (IARIA)}, isbn = {978-1-61839-645-7}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-4106}, pages = {194 -- 199}, year = {2011}, abstract = {This work presents a disconnected transaction model able to cope with the increased complexity of longliving, hierarchically structured, and disconnected transactions. Wecombine an Open and Closed Nested Transaction Model with Optimistic Concurrency Control and interrelate flat transactions with the aforementioned complex nature. Despite temporary inconsistencies during a transaction's execution our model ensures consistency.}, language = {en} } @book{HertweckKueller2015, author = {Hertweck, Dieter and K{\"u}ller, Philipp}, title = {KonfIT-SSC : Entwicklung einer Konfigurationsumgebung f{\"u}r IT-Service-Supply-Chains kleiner Unternehmen der Kreativwirtschaft}, publisher = {MFG Stiftung Baden-W{\"u}rttemberg}, address = {Stuttgart}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-6472}, pages = {96}, year = {2015}, abstract = {War Anfang des Jahrtausends der Wertbeitrag der IT zum Unternehmenserfolg noch umstritten, so negieren diesen heute nur noch die wenigsten Gesch{\"a}ftsf{\"u}hrer. Wie Wertsch{\"o}pfung durch Alignment von Unternehmens- und IT-Strategie mittels passender IT-Architekturen erzeugt wird, scheint f{\"u}r kleine und mittlere Unternehmen (KMU) verschiedenster Branchen noch immer mysteri{\"o}s. Besonders fatal ist diese L{\"u}cke in den KMU der Kultur- und Kreativwirtschaft, die klassischen Industriesektoren als Innovationslieferanten dienen. An dieser Stelle setzt der vorliegende Bericht an. Er baut auf den Ergebnissen des Forschungsprojekts KonfIT-SSC auf, das in den vergangenen Jahren die M{\"o}glichkeit erforschte, mit Produktkonfiguratoren den „strategical fit" zwischen Business und IT-Strukturen zu bewerkstelligen. Die zentrale Herausforderung bei diesem Vorhaben war es, Daten {\"u}ber Informationssystemstrukturen und die sie bestimmenden {\"O}kosysteme so zu erheben, dass sie einer formalen Modellierung von Regelwerken und der Konfiguration von Gesch{\"a}ftsarchitekturen zug{\"a}nglich werden. Der vorliegende Bericht liefert Antworten auf die Fragen, wie sich passende IT-Service Strategien f{\"u}r Unternehmen der Kultur- und Kreativwirtschaft erreichen lassen, welchen Beitrag Produktkonfiguratoren dabei liefern k{\"o}nnen und mit welchen Methoden sich Daten gewinnen lassen, um generische IT-Architekturen f{\"u}r KMU der Kreativbranche definieren zu k{\"o}nnen. Dabei werden im Verlauf neben den Antworten auf die wissenschaftlichen Fragestellungen auch die Ergebnisse der einzelnen Schritte zur L{\"o}sung der Aufgabenstellung in Form eines handels{\"u}blichen Konfigurators dokumentiert. Als Methoden im Rahmen des Vorgehens kommen dabei zur Datengewinnung ein klassischer Literature Review, eine Online-Befragung sowie f{\"u}nf Fallstudien in kleinen und mittleren Unternehmen der Werbebranche, aber auch Interviews mit Experten zum Einsatz. Bei der Analyse der Daten werden die Modellierung von Wertsch{\"o}pfungsnetzen (e3value und i*), aber auch die Referenzmodellierung von Unternehmensarchitekturen verwendet. Abschließend wird das Vorgehen bei der Entwicklung der Konfigurationsmodelle (Regelwerke) und der Implementierung erl{\"a}utert.}, language = {de} } @inproceedings{JugelSchwedaZimmermann2015, author = {Jugel, Dierk and Schweda, Christian and Zimmermann, Alfred}, title = {Modeling decisions for collaborative enterprise architecture engineering}, series = {Advanced Information Systems Engineering Workshops : CAiSE 2015 International Workshops, Stockholm, Sweden, June 8-9, 2015, Proceedings}, booktitle = {Advanced Information Systems Engineering Workshops : CAiSE 2015 International Workshops, Stockholm, Sweden, June 8-9, 2015, Proceedings}, editor = {Persson, Anne}, publisher = {Springer}, address = {Cham}, isbn = {978-3-319-19243-7}, doi = {10.1007/978-3-319-19243-7_33}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-6545}, pages = {351 -- 362}, year = {2015}, abstract = {New or adapted digital business models have huge impacts on Enterprise Architectures (EA) and require them to become more agile, flexible, and adaptable. All these changes are happening frequently and are currently not well documented. An EA consists of a lot of elements with manifold relationships between them. Thus changing the business model may have multiple impacts on other architectural elements. The EA engineering process deals with the development, change and optimization of architectural elements and their dependencies. Thus an EA provides a holistic view for both business and IT from the perspective of many stakeholders, which are involved in EA decision-making processes. Different stakeholders have specific concerns and are collaborating today in often unclear decision-making processes. In our research we are investigating information from collaborative decision-making processes to support stakeholders in taking current decisions. In addition we provide all information necessary to understand how and why decisions were taken. We are collecting the decision-related information automatically to minimize manual time intensive work as much as possible. The core contribution of our research extends a decisional metamodel, which links basic decisions with architectural elements and extends them with an associated decisional case context. Our aim is to support a new integral method for multi perspective and collaborative decision-making processes. We illustrate this by a practice-relevant decision-making scenario for Enterprise Architecture Engineering.}, language = {en} } @inproceedings{JugelKehrerSchwedaetal.2015, author = {Jugel, Dierk and Kehrer, Stefan and Schweda, Christian and Zimmermann, Alfred}, title = {A decision-making case for collaborative enterprise architecture engineering}, series = {Informatik 2015 - Informatik, Energie und Umwelt; 28.9. - 2.10.2015 in Cottbus}, booktitle = {Informatik 2015 - Informatik, Energie und Umwelt; 28.9. - 2.10.2015 in Cottbus}, publisher = {Gesellschaft f{\"u}r Informatik}, address = {Bonn}, isbn = {978-3-88579-640-4}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-6568}, pages = {865 -- 879}, year = {2015}, abstract = {In modern times markets are very dynamic. This situation requires agile enterprises to have the ability to react fast on market influences. Thereby an enterprise' IT is especially affected, because new or changed business models have to be realized. However, enterprise architectures (EA) are complex structures consisting of many artifacts and relationships between them. Thus analyzing an EA becomes to a complex task for stakeholders. In addition, many stakeholders are involved in decision-making processes, because Enterprise Architecture Management (EAM) targets providing a holistic view of the enterprise. In this article we use concepts of Adaptive Case Management (ACM) to design a decision-making case consisting of a combination of different analysis techniques to support stakeholders in decision-making. We exemplify the case with a scenario of a fictive enterprise.}, language = {en} } @inproceedings{ScherzOrtegaRamirezMartinezMadridetal.2015, author = {Scherz, Wilhelm Daniel and Ortega Ram{\´i}rez, Juan Antonio and Mart{\´i}nez Madrid, Natividad and Seepold, Ralf}, title = {Heart rate variability indicating stress visualized by correlations plots}, series = {Bioinformatics and Biomedical Engineering : Third International Conference, IWBBIO 2015, Granada, Spain, April 15-17, 2015. Proceedings, Part II}, booktitle = {Bioinformatics and Biomedical Engineering : Third International Conference, IWBBIO 2015, Granada, Spain, April 15-17, 2015. Proceedings, Part II}, editor = {Ortuno, Francisco, and Rojas, Ignacio,}, publisher = {Springer}, address = {Cham}, isbn = {978-331-91648-0-9}, doi = {10.1007/978-3-319-16480-9}, pages = {710 -- 719}, year = {2015}, abstract = {Stress is recognized as a factor of predominant disease and in the future the costs for treatment will increase. The presented approach tries to detect stress in a very basic and easy to implement way, so that the cost for the device and effort to wear it remain low. The user should benefit from the fact that the system offers an easy interface reporting the status of his body in real time. In parallel, the system provides interfaces to pass the obtained data forward for further processing and (professional) analyses, in case the user agrees. The system is designed to be used in every day's activities and it is not restricted to laboratory use or environments. The implementation of the enhanced prototype shows that the detection of stress and the reporting can be managed using correlation plots and automatic pattern recognition even on a very light weighted microcontroller platform.}, language = {en} } @inproceedings{SeepoldMartinezMadrid2015, author = {Seepold, Ralf and Mart{\´i}nez Madrid, Natividad}, title = {Case management techniques capturing individual dysfunctionality}, series = {6th European Conference of the International Federation for Medical and Biological Engineering : MBEC 2014, 7-11 September 2014, Dubrovnik, Croatia}, booktitle = {6th European Conference of the International Federation for Medical and Biological Engineering : MBEC 2014, 7-11 September 2014, Dubrovnik, Croatia}, editor = {Lacković, Igor and Vasic, Darko}, publisher = {Springer}, address = {Cham}, doi = {10.1007/978-3-319-11128-5_221}, pages = {889 -- 892}, year = {2015}, abstract = {An ongoing challenge in our days is to lower the impact on the quality of life caused by dysfunctionality through individual support. With the background of an aging society and continuous increases in costs for care, a holistic solution is needed. This solution must integrate individual needs and preferences, locally available possibilities, regional conditions, professional and informal caregivers and provide the flexibility to implement future requirements. The proposed model is a result of a common initiative to overcome the major obstacles and to center a solution on individual needs caused by dysfunctionality.}, language = {en} } @article{FagerholmIkonenKettunenetal.2015, author = {Fagerholm, Fabian and Ikonen, Marko and Kettunen, Petri and M{\"u}nch, J{\"u}rgen and Roto, Virpi and Abrahamsson, Pekka}, title = {Performance alignment work : how software developers experience the continuous adaptation of team performance in lean and agile environments}, series = {Information and software technology}, volume = {64}, journal = {Information and software technology}, publisher = {Elsevier}, address = {Amsterdam}, issn = {0950-5849}, doi = {10.1016/j.infsof.2015.01.010}, pages = {132 -- 147}, year = {2015}, abstract = {Context: Companies increasingly strive to adapt to market and ecosystem changes in real time. Gauging and understanding team performance in such changing environments present a major challenge. Objective: This paper aims to understand how software developers experience the continuous adaptation of performance in a modern, highly volatile environment using Lean and Agile software development methodology. This understanding can be used as a basis for guiding formation and maintenance of high-performing teams, to inform performance improvement initiatives, and to improve working conditions for software developers. Method: A qualitative multiple-case study using thematic interviews was conducted with 16 experienced practitioners in five organisations. Results: We generated a grounded theory, Performance Alignment Work, showing how software developers experience performance. We found 33 major categories of performance factors and relationships between the factors. A cross-case comparison revealed similarities and differences between different kinds and different sizes of organisations. Conclusions: Based on our study, software teams are engaged in a constant cycle of interpreting their own performance and negotiating its alignment with other stakeholders. While differences across organisational sizes exist, a common set of performance experiences is present despite differences in context variables. Enhancing performance experiences requires integration of soft factors, such as communication, team spirit, team identity, and values, into the overall development process. Our findings suggest a view of software development and software team performance that centres around behavioural and social sciences.}, language = {en} } @inproceedings{KuellerHertweckKrcmar2015, author = {K{\"u}ller, Philipp and Hertweck, Dieter and Krcmar, Helmut}, title = {Energiegenossenschaften - Gesch{\"a}ftsmodelle und Wertsch{\"o}pfungsnetzwerke}, series = {Digital Enterprise Computing (DEC 2015) : June 25-26, 2015, B{\"o}blingen, Germany}, booktitle = {Digital Enterprise Computing (DEC 2015) : June 25-26, 2015, B{\"o}blingen, Germany}, editor = {Zimmermann, Alfred and Rossmann, Alexander}, publisher = {Gesellschaft f{\"u}r Informatik}, address = {Bonn}, isbn = {978-3-88579-638-1}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-5952}, pages = {15 -- 26}, year = {2015}, abstract = {Die Energiewende bietet reichlich Fragen f{\"u}r verschiedenste Wissenschaftsdisziplinen einschließlich der Informatik und Wirtschaftsinformatik (WI). Bedauerlicherweise wurde bisher der Bereich der regionalen Energiegenossenschaften und kleinerer Energieversorgungsunternehmen weitgehend von der WI-Forschung vernachl{\"a}ssigt. Der vorliegende Beitrag stellt die aktuelle Situation dieser Organisationen dar und konzentriert sich auf die bestehende Wissensl{\"u}cke von Gesch{\"a}ftsmodellen (GM) f{\"u}r Energiegenossenschaften (EG) als Zusammenschluss aus Privatpersonen oder kleinen Unternehmen, welche prim{\"a}r regionale, erneuerbare Energie produzieren. Die Modell- und Theorieentwicklung basiert auf der klassischen Literaturrecherche, Fallstudien in der Energiewirtschaft (EW), sowie grafischer Modellierung. Als Ergebnis wird das Referenzgesch{\"a}ftsmodell einer EG als morphologischer Business Model Canvas vorgestellt. Dieses singul{\"a}re GM wird um die Darstellung des Wertsch{\"o}pfungsnetzwerks, welches die strukturelle Einbindung der Akteure in das digitale {\"O}kosystem der EG ber{\"u}cksichtigt, erweitert. Das aus der Forschung resultierende Referenzmodell dient der kritischen {\"U}berpr{\"u}fung empirisch vorfindbarer GM und zur weiteren Entwicklung von Unternehmensarchitekturen digitaler Unternehmensverb{\"u}nde.}, language = {de} } @inproceedings{RossmannStei2015, author = {Rossmann, Alexander and Stei, Gerald}, title = {Customer services in the digital transformation: social media versus hotline channel performance}, series = {Digital Enterprise Computing (DEC 2015) : June 25-26, 2015, B{\"o}blingen, Germany}, booktitle = {Digital Enterprise Computing (DEC 2015) : June 25-26, 2015, B{\"o}blingen, Germany}, editor = {Zimmermann, Alfred and Rossmann, Alexander}, publisher = {Gesellschaft f{\"u}r Informatik}, address = {Bonn}, isbn = {978-3-88579-638-1}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-5965}, pages = {27 -- 38}, year = {2015}, abstract = {Due to the digital transformation online service strategies have gained prominence in practice as well as in the theory of service management. This study examines the efficacy of different types of service channels in customer complaint handling. The theoretical framework, developed using complaint handling and social media literature, is tested against data collected from two different channels (hotline and social media) of a German telecommunication service provider. We contribute to the understanding of firm's multichannel distribution strategy in two ways: a) by conceptualizing and evaluating complaint handling quality across traditional and social media channels, and b) by testing the impact of complaint handling quality on key performance outcomes like customer loyalty, positive word-of-mouth, and cross purchase intentions.}, language = {en} } @inproceedings{ZimmermannSchmidtSandkuhletal.2015, author = {Zimmermann, Alfred and Schmidt, Rainer and Sandkuhl, Kurt and Jugel, Dierk and M{\"o}hring, Michael and Wißotzki, Matthias}, title = {Enterprise architecture management for the internet of things}, series = {Digital Enterprise Computing (DEC 2015) : June 25-26, 2015, B{\"o}blingen, Germany}, booktitle = {Digital Enterprise Computing (DEC 2015) : June 25-26, 2015, B{\"o}blingen, Germany}, editor = {Zimmermann, Alfred and Rossmann, Alexander}, publisher = {Gesellschaft f{\"u}r Informatik}, address = {Bonn}, isbn = {978-3-88579-638-1}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-5977}, pages = {139 -- 150}, year = {2015}, abstract = {The Internet of Things (IoT) fundamentally influences today's digital strategies with disruptive business operating models and fast changing markets. New business information systems are integrating emerging Internet of Things infrastructures and components. With the huge diversity of Internet of Things technologies and products organizations have to leverage and extend previous enterprise architecture efforts to enable business value by integrating the Internet of Things into their evolving Enterprise Architecture Management environments. Both architecture engineering and management of current enterprise architectures is complex and has to integrate beside the Internet of Things synergistic disciplines like EAM - Enterprise Architecture and Management with disciplines like: services \& cloud computing, semantic-based decision support through ontologies and knowledge-based systems, big data management, as well as mobility and collaboration networks. To provide adequate decision support for complex business/IT environments, it is necessary to identify affected changes of Internet of Things environments and their related fast adapting architecture. We have to make transparent the impact of these changes over the integral landscape of affected EAM-capabilities, like directly and transitively impacted IoT-objects, business categories, processes, applications, services, platforms and infrastructures. The paper describes a new metamodel-based approach for integrating partial Internet of Things objects, which are semi-automatically federated into a holistic Enterprise Architecture Management environment.}, language = {en} } @inproceedings{JugelKehrerSchwedaetal.2015, author = {Jugel, Dierk and Kehrer, Stefan and Schweda, Christian and Zimmermann, Alfred}, title = {Providing EA decision support for stakeholders by automated analyses}, series = {Digital Enterprise Computing (DEC 2015) : June 25-26, 2015, B{\"o}blingen, Germany}, booktitle = {Digital Enterprise Computing (DEC 2015) : June 25-26, 2015, B{\"o}blingen, Germany}, editor = {Zimmermann, Alfred and Rossmann, Alexander}, publisher = {Gesellschaft f{\"u}r Informatik}, address = {Bonn}, isbn = {978-3-88579-638-1}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-5989}, pages = {151 -- 162}, year = {2015}, abstract = {Enterprise architecture management (EAM) is a holistic approach to tackle the complex Business and IT architecture. The transformation of an organization's EA towards a strategy-oriented system is a continuous task. Many stakeholders have to elaborate on various parts of the EA to reach the best decisions to shape the EA towards an optimized support of the organizations' capabilities. Since the real world is too complex, analyzing techniques are needed to detect optimization potentials and to get all information needed about an issue. In practice visualizations are commonly used to analyze EAs. However these visualizations are mostly static and do not provide analyses. In this article we combine analyzing techniques from literature and interactive visualizations to support stakeholders in EA decision-making.}, language = {en} } @inproceedings{RossmannStei2015, author = {Rossmann, Alexander and Stei, Gerald}, title = {User engagement in corporate Facebook communities}, series = {Digital Enterprise Computing (DEC 2015) : June 25-26, 2015, B{\"o}blingen, Germany}, booktitle = {Digital Enterprise Computing (DEC 2015) : June 25-26, 2015, B{\"o}blingen, Germany}, editor = {Zimmermann, Alfred and Rossmann, Alexander}, publisher = {Gesellschaft f{\"u}r Informatik}, address = {Bonn}, isbn = {978-3-88579-638-1}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-6004}, pages = {51 -- 62}, year = {2015}, abstract = {The stimulation of user engagement has received significant attention in extant research. However, the theory of antecedents for user engagement with an initial electronic word-of-mouth (eWoM) communication is relatively less developed. In an investigation of 576 unique user postings across independent Facebook (FB) communities for two German firms, we contribute to the extant knowledge on user engagement in two different ways. First, we explicate senders' prior usage experience and the extent of their acquaintance with other community members as the two key drivers of user engagement across a product and a service community. Second, we reveal that these main effects differ according to the type of community. In service communities, experience has a stronger impact on user engagement; whereas, in product communities, acquaintance is more important.}, language = {en} } @inproceedings{RossmannStei2015, author = {Rossmann, Alexander and Stei, Gerald}, title = {Sales 2.0 in business-to-business (B2B) Networks : conceptualization and impact of social media in B2B Sales relationships}, series = {Digital Enterprise Computing (DEC 2015) : June 25-26, 2015, B{\"o}blingen, Germany}, booktitle = {Digital Enterprise Computing (DEC 2015) : June 25-26, 2015, B{\"o}blingen, Germany}, editor = {Zimmermann, Alfred}, publisher = {Gesellschaft f{\"u}r Informatik}, address = {Bonn}, isbn = {978-3-88579-638-1}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-6017}, pages = {67 -- 78}, year = {2015}, abstract = {In recent years, the rise of the digital transformation received significant importance in Business-to-Business (B2B) research. Social media applications provide executives with a raft of new options. Consequently, interfaces to social media platforms have also been integrated into B2B salesforce applications, although very little is as yet known about their usage and general impact on B2B sales performance. This paper evaluates 1) the conceptualization of social media usage in a dyadic B2B relationship; 2) the effects of a more differentiated usage construct on customer satisfaction; 3) antecedents of social media usage on multiple levels; and 4) the effectiveness of social media usage for different types of customers. The framework presented here is tested cross-industry against data collected from dyadic buyer seller relationships in the IT service industry. The results elucidate the preconditions and the impact of social media usage strategies in B2B sales relations.}, language = {en} } @inproceedings{Kornherr2015, author = {Kornherr, Tim}, title = {Disruptive Innovationsmethoden im automotiven Produktentstehungsprozess}, series = {Digital Enterprise Computing (DEC 2015) : June 25-26, 2015, B{\"o}blingen, Germany}, booktitle = {Digital Enterprise Computing (DEC 2015) : June 25-26, 2015, B{\"o}blingen, Germany}, editor = {Zimmermann, Alfred}, publisher = {Gesellschaft f{\"u}r Informatik}, address = {Bonn}, isbn = {978-3-88579-638-1}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-6056}, pages = {79 -- 84}, year = {2015}, abstract = {Im Rahmen der Vernetzung des Autos dr{\"a}ngen neue Wettbewerber in die Automobilindustrie. Mittels disruptiver Innovationsmethoden haben Google, Apple, Facebook und Co. bereits Branchen grundlegend ver{\"a}ndert und Marktf{\"u}hrer wie Nokia oder Otto innerhalb weniger Jahre abgel{\"o}st. Die folgende Arbeit befasst sich mit diesen Methoden und der Fragestellung, wie sie in den automotiven Produktentstehungsprozess integriert werden k{\"o}nnen, um nachhaltig erfolgreiche Gesch{\"a}ftsmodelle am Markt platzieren zu k{\"o}nnen.}, language = {de} } @inproceedings{EstelFischer2015, author = {Estel, Marcel and Fischer, Laura}, title = {Feasibility of Bluetooth iBeacons for indoor localization}, series = {Digital Enterprise Computing (DEC 2015) : June 25-26, 2015, B{\"o}blingen, Germany}, booktitle = {Digital Enterprise Computing (DEC 2015) : June 25-26, 2015, B{\"o}blingen, Germany}, editor = {Zimmermann, Alfred and Rossmann, Alexander}, publisher = {Gesellschaft f{\"u}r Informatik}, address = {Bonn}, isbn = {978-3-88579-638-1}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-6062}, pages = {97 -- 108}, year = {2015}, abstract = {Location-based services in buildings represent a great advantage for people to search places, products or people. In our paper we examine the feasibility of Bluetooth iBeacons for indoor localization. In the first part we define and evaluate the iBeacon technology through different experiments. In the second part our solution application is described. Our system is able to estimate the position of the user's smartphone based on RSSI measurements. Therefore we used the built-in smartphone sensor and a building map with required sender information. Trilateration is used as positioning technique in contrast to fingerprinting to minimize beforehand effort. Results are promising but cannot reach the same accuracy level as sensor-fusion or fingerprinting approaches.}, language = {en} } @inproceedings{GovedarskiHauptmannSchweda2015, author = {Govedarski, Konstantin and Hauptmann, Claudius and Schweda, Christian}, title = {Bottom-up EA management governance using recommender systems}, series = {Digital Enterprise Computing (DEC 2015) : June 25-26, 2015, B{\"o}blingen, Germany}, booktitle = {Digital Enterprise Computing (DEC 2015) : June 25-26, 2015, B{\"o}blingen, Germany}, editor = {Zimmermann, Alfred and Rossmann, Alexander}, publisher = {Gesellschaft f{\"u}r Informatik}, address = {Bonn}, isbn = {978-3-88579-638-1}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-6077}, pages = {163 -- 173}, year = {2015}, abstract = {Enterprise Architecture (EA) management is an activity that seeks to foster the alignment of business and IT, and pursues various goals further operationalizing this alignment. Key to effective EA management is a framework that defines the roles, activities, and viewpoints used for EA management in accordance to the concerns that the stakeholders aim to address. Consensus holds that such frameworks are organization-specific and hence they are designed in governance activities for EA management. As of today, top-down approaches for governance are used to derive organization-specific frameworks. These usually lack systematic mechanisms for improving the framework based on the feedback of the responsible stakeholders. We outline a bottom-up approach for EA management governance that systematically observes the behavior of the actors to learn user concerns and recommend appropriate viewpoints. With this approach, we complement traditional top-down governance activities.}, language = {en} } @inproceedings{HammKehrer2015, author = {Hamm, Thomas and Kehrer, Stefan}, title = {Goal-oriented decision support in collaborative enterprise architecture}, series = {Digital Enterprise Computing (DEC 2015) : June 25-26, 2015, B{\"o}blingen, Germany}, booktitle = {Digital Enterprise Computing (DEC 2015) : June 25-26, 2015, B{\"o}blingen, Germany}, editor = {Zimmermann, Alfred and Rossmann, Alexander}, publisher = {Gesellschaft f{\"u}r Informatik}, address = {Bonn}, isbn = {978-3-88579-638-1}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-6081}, pages = {185 -- 182}, year = {2015}, abstract = {Decision-making in the field of Enterprise Architecture (EA) is a complex task. Many organizations establish a set of complex processes and hierarchical structures to enable strategy-driven development of their EA. This leads to slow and inefficient decision-making entailing bad time-to-market and discontented stakeholders. Collaborative EA delineates a lightweight approach to enable EA decisions but often neglects strategic alignment. In this paper, we present an approach to integrate the concept of collaborative EA and goal-driven decision-making through collaborative modeling of goal-oriented information demands based on ArchiMate's motivation extension to reach a goal-oriented EA decision support in a collaborative EA environment.}, language = {en} } @inproceedings{ZimmermannSchmidtJugeletal.2015, author = {Zimmermann, Alfred and Schmidt, Rainer and Jugel, Dierk and M{\"o}hring, Michael}, title = {Evolving enterprise architectures for digital transformations}, series = {Digital Enterprise Computing (DEC 2015) : June 25-26, 2015, B{\"o}blingen, Germany}, booktitle = {Digital Enterprise Computing (DEC 2015) : June 25-26, 2015, B{\"o}blingen, Germany}, editor = {Zimmermann, Alfred and Rossmann, Alexander}, publisher = {Gesellschaft f{\"u}r Informatik}, address = {Bonn}, isbn = {978-3-88579-638-1}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-6099}, pages = {183 -- 194}, year = {2015}, abstract = {The digital transformation of our society changes the way we live, work, learn, communicate, and collaborate. This disruptive change interacts with all information processes and systems that are important business enablers for the digital transformation since years. The Internet of Things, social collaboration systems for adaptive case management, mobility systems and services for Big Data in cloud services environments are emerging to support intelligent user-centered and social community systems. They will shape future trends of business innovation and the next wave of information and communication technology. Biological metaphors of living and adaptable ecosystems provide the logical foundation for self-optimizing and resilient run-time environments for intelligent business services and related distributed information systems with service-oriented enterprise architectures. The present research investigates mechanisms for flexible adaptation and evolution of digital enterprise architectures in the context of integrated synergistic disciplines like distributed service-oriented architectures and information systems, EAM - Enterprise Architecture and Management, metamodeling, semantic echnologies, web services, cloud computing and Big Data technology. Our aim is to support flexibility and agile transformations for both business domains and related enterprise systems through adaptation and evolution of digital enterprise architectures. The present research paper investigates digital transformations of business and IT and integrates fundamental mappings between adaptable digital enterprise architectures and service-oriented information systems.}, language = {en} } @inproceedings{BreitbachCubukcuogluGorhanetal.2015, author = {Breitbach, Sebastian and Cubukcuoglu, Baris and Gorhan, Tobias and Hammer, Daniel and Jugel, Dierk and Wenzel, Christoph}, title = {Konzeption und prototypische Umsetzung eines Architekturcockpits}, series = {Digital Enterprise Computing (DEC 2015) : June 25-26, 2015, B{\"o}blingen, Germany}, booktitle = {Digital Enterprise Computing (DEC 2015) : June 25-26, 2015, B{\"o}blingen, Germany}, editor = {Zimmermann, Alfred and Rossmann, Alexander}, publisher = {Gesellschaft f{\"u}r Informatik}, address = {Bonn}, isbn = {978-3-88579-638-1}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-6112}, pages = {195 -- 205}, year = {2015}, abstract = {EAM ist ein holistischer Ansatz, um komplexe IT- und Unternehmensstrukturen darzustellen. Dabei ist es von zentraler Bedeutung, diese Strukturen m{\"o}glichst komplett und {\"u}bersichtlich zu visualisieren. Ein Ansatz, dies zu erreichen, ist eine multiperspektivische Darstellung von mehreren Views in einem Architekturcockpit. Dabei k{\"o}nnen mehrere Views simultan betrachtet und analysiert werden. Dadurch ist es m{\"o}glich, die Auswirkungen einer Analyse des Views eines Stakeholders simultan aus den Views anderer Stakeholder betrachten zu k{\"o}nnen, um eventuelle Wechselwirkungen zu erkennen und einen allgemeinen {\"U}berblick {\"u}ber die Unternehmensarchitektur zu behalten. In dieser Arbeit zeigen wir, von der Konzeption {\"u}ber die Umsetzung bis zu einem Anwendungsbeispiel, wie ein solches Architekturcockpit realisiert werden kann.}, language = {de} } @inproceedings{SchieleLauxConnolly2015, author = {Schiele, Felix and Laux, Friedrich and Connolly, Thomas}, title = {Improving the understanding of business processes}, series = {Digital Enterprise Computing (DEC 2015) : June 25-26, 2015, B{\"o}blingen, Germany}, booktitle = {Digital Enterprise Computing (DEC 2015) : June 25-26, 2015, B{\"o}blingen, Germany}, editor = {Zimmermann, Alfred and Rossmann, Alexander}, publisher = {Gesellschaft f{\"u}r Informatik}, address = {Bonn}, isbn = {978-3-88579-638-1}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-6128}, pages = {209 -- 220}, year = {2015}, abstract = {Business processes are important knowledge resources of a company. The knowledge contained in business processes impart procedures used to create products and services. However, modelling and application of business processes are affected by problems connected to knowledge transfer. This paper presents and implements a layered model to improve the knowledge transfer. Thus modelling and understanding of business process models is supported. An evaluation of the approach is presented and results and other areas of application are discussed.}, language = {en} } @inproceedings{HeberHagenSchmollinger2015, author = {Heber, Eberhard and Hagen, Holger and Schmollinger, Martin}, title = {Application of process mining for improving adaptivity in case management systems}, series = {Digital Enterprise Computing (DEC 2015) : June 25-26, 2015, B{\"o}blingen, Germany}, booktitle = {Digital Enterprise Computing (DEC 2015) : June 25-26, 2015, B{\"o}blingen, Germany}, editor = {Zimmermann, Alfred and Rossmann, Alexander}, publisher = {Gesellschaft f{\"u}r Informatik}, address = {Bonn}, isbn = {978-3-88579-638-1}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-6136}, pages = {221 -- 231}, year = {2015}, abstract = {The character of knowledge-intense processes is that participants decide the next process activities on base of the present information and their expert knowledge. The decisions of these knowledge workers are in general non-deterministic. It is not possible to model these processes in advance and to automate them using a process engine of a BPM system. Hence, in this context a process instance is called a case, because there is no predefined model that could be instantiated. Domain-specific or general case management systems are used to support the knowledge workers. These systems provide all case information and enable users to define the next activities, but they have no or only limited activity recommendation capabilities. In the following paper, we present a general concept for a self-learning system based on process mining that suggests the next best activity on quantitative and qualitative data for a given case. As a proof of concept, it was applied to the area of insurance claims settlement.}, language = {en} } @inproceedings{CollenbuschSauterTastekiletal.2015, author = {Collenbusch, Danielle and Sauter, Anja and Tastekil, Ipek and Uslu, Denise}, title = {Experiencing adaptive case management capabilities with Cognoscenti}, series = {Digital Enterprise Computing (DEC 2015) : June 25-26, 2015, B{\"o}blingen, Germany}, booktitle = {Digital Enterprise Computing (DEC 2015) : June 25-26, 2015, B{\"o}blingen, Germany}, editor = {Zimmermann, Alfred and Rossmann, Alexander}, publisher = {Gesellschaft f{\"u}r Informatik}, address = {Bonn}, isbn = {978-3-88579-638-1}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-6145}, pages = {233 -- 243}, year = {2015}, abstract = {In a world with rapidly changing customer requirements and the increased role of technology, companies need more flexible systems to adapt their processes and react dynamically to changes. Adaptive Case Management (ACM) comes into consideration by providing a concept to adapt to changing business conditions. Within our research project we did a first foundational evaluation of the potential of ACM in supporting unpredictable sales processes. Based on a set of criteria we tested the concept of ACM with the open source tool Cognoscenti. The evaluation gave us the possibility to experience the concept of ACM. Hence we were able to provide a statement about the potential of ACM within the context of an unpredictable sales process, setting the path to further research and discussion of ACM in the area of sales processes.}, language = {en} } @inproceedings{SchaidnagelLauxConnolly2015, author = {Schaidnagel, Michael and Laux, Friedrich and Connolly, Thomas}, title = {Using feature construction for dimensionality reduction in big data scenarios to allow real time classification of sequence data}, series = {Digital enterprise computing (DEC 2015)}, booktitle = {Digital enterprise computing (DEC 2015)}, editor = {Zimmermann, Alfred and Rossmann, Alexander}, publisher = {Gesellschaft f{\"u}r Informatik}, address = {Bonn}, isbn = {978-3-88579-638-1}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-6154}, pages = {259 -- 269}, year = {2015}, abstract = {A sequence of transactions represents a complex and multi dimensional type of data. Feature construction can be used to reduce the data´s dimensionality to find behavioural patterns within such sequences. The patterns can be expressed using the blue prints of the constructed relevant features. These blue prints can then be used for real time classification on other sequences.}, language = {en} } @inproceedings{BonhorstKopfMeawad2015, author = {Bonhorst, Heiko and Kopf, Patrick and Meawad, Fekkry}, title = {Automatisiertes Data Discovery innerhalb eines Provisionierungstools}, series = {Digital Enterprise Computing (DEC 2015) : June 25-26, 2015, B{\"o}blingen, Germany}, booktitle = {Digital Enterprise Computing (DEC 2015) : June 25-26, 2015, B{\"o}blingen, Germany}, editor = {Zimmermann, Alfred and Rossmann, Alexander}, publisher = {Gesellschaft f{\"u}r Informatik}, address = {Bonn}, isbn = {978-3-88579-638-1}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-6160}, pages = {271 -- 280}, year = {2015}, abstract = {Das Provisioning Tool automaIT wurde prototypisch um die M{\"o}glichkeit eines Data Discovery erweitert, mit dem Ziel, nicht durch automaIT verwaltete Systeme anbinden und steuern zu k{\"o}nnen. Daten aus dem Data Discovery werden mittels dem Tool Facter gesammelt und k{\"o}nnen dynamisch in ausf{\"u}hrbare Modelle von automaIT integriert und ausgewertet werden. Dadurch kann der Verlauf weiterer Provisionierungsschritte gesteuert werden, ohne dass es eines manuellen Eingriffs bedarf.}, language = {de} } @article{FeussnerSchneiderBurgert2015, author = {Feußner, Hubertus and Schneider, Antonius and Burgert, Oliver}, title = {Harmonisierung der Ger{\"a}teausstattung im chirurgischen OP}, series = {Chirurgie : Mitteilungen der Deutschen Gesellschaft f{\"u}r Chirurgie}, journal = {Chirurgie : Mitteilungen der Deutschen Gesellschaft f{\"u}r Chirurgie}, number = {1}, publisher = {Thieme}, address = {Stuttgart}, issn = {2197-0548}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-6173}, pages = {37 -- 40}, year = {2015}, language = {de} } @inproceedings{FinkWiemuthBurgert2015, author = {Fink, Elena and Wiemuth, Markus and Burgert, Oliver}, title = {Design and first implementation of business process visualization for a task manager supporting the workflow in an operating room}, series = {Image-guided procedures, robotic interventions, and modeling : medical imaging 2015 ; 22-24 February 2015, Orlando, Florida, United States}, booktitle = {Image-guided procedures, robotic interventions, and modeling : medical imaging 2015 ; 22-24 February 2015, Orlando, Florida, United States}, editor = {Yaniv, Ziv}, publisher = {SPIE}, address = {Bellingham, USA}, isbn = {978-1-62841-505-6}, doi = {10.1117/12.2081805}, year = {2015}, abstract = {An operating room is a stressful work environment. Nevertheless, all involved persons have to work safely as there is no space for mistakes. To ensure a high level of concentration and seamless interaction, all involved persons have to know their own tasks and the tasks of their colleagues. The entire team must work synchronously at all times. To optimize the overall workflow, a task manager supporting the team was developed. In parallel, a common conceptual design of a business process visualization was developed, which makes all relevant information accessible in real-time during a surgery. In this context an overview of all processes in the operating room was created and different concepts for the graphical representation of these user-dependent processes were developed. This paper describes the concept of the task manager as well as the general concept in the field of surgery.}, language = {en} } @inproceedings{WiemuthFinkBurgert2015, author = {Wiemuth, Markus and Fink, Elena and Burgert, Oliver}, title = {Anbindung einer perioperativen Prozess-Visualisierung an eine Workflow Engine}, series = {CURAC 2015 - Tagungband : 14. Jahrestagung der Gesellschaft f{\"u}r Computer- und Roboterassistierte Chirurgie (CURAC), 17.-19. September 2015, Bremen}, booktitle = {CURAC 2015 - Tagungband : 14. Jahrestagung der Gesellschaft f{\"u}r Computer- und Roboterassistierte Chirurgie (CURAC), 17.-19. September 2015, Bremen}, editor = {Kahn, Horst}, publisher = {Fraunhofer MEVIS}, address = {Bremen}, isbn = {978-3-00-050359-7}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-6199}, pages = {253 -- 257}, year = {2015}, abstract = {Informationstechnische Systeme, die den Arbeitsablauf im klinischen Bereich unterst{\"u}tzen, sind aktuell auf organisatorische Abl{\"a}ufe beschr{\"a}nkt. Diese Arbeit stellt einen ersten Ansatz vor, wie solch ein System in den perioperativen Bereich eingebracht werden kann. Hierzu wurde eine Workflow Engine mit einer perioperativen Prozess-Visualisierung verkn{\"u}pft. Das System wurde nach Modell-View-Controller-Prinzip implementiert. Als „Controller" kommt die Workflow Engine zum Einsatz; also „Modell" ein Prozessmodell, mit den erforderlichen klinischen Daten. Der „View" wurde durch eine abgekoppelte Anwendung realisiert, welche auf Web-Technologien basiert. Drei Visualisierungen, die Workflow Engine sowie die Anbindung beider {\"u}ber eine Datenbankschnittstelle, wurden erfolgreich umgesetzt. Bei den drei Visualisierungen wurden jeweils eine Ansicht f{\"u}r den OP-Koordinator, den Springer und eine Ansicht f{\"u}r die {\"U}bersicht einer OP erstellt.}, language = {de} } @article{Roth2015, author = {Roth, Armin}, title = {Management cockpit as a layer of integration for a holistic performance management}, series = {Quarterly review of business disciplines}, volume = {2}, journal = {Quarterly review of business disciplines}, number = {2}, publisher = {International Academy of Business Disciplines}, address = {Jamaica, New York}, issn = {2334-0169}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-6364}, pages = {165 -- 175}, year = {2015}, abstract = {Management nowadays is confronted by a variety of information originating from either internal or external sources. Thereby, the difficulty to focus on the relevant and company critical keyfigures information increases. In practice, information management is often a major weakness of efficient corporate management. That weakness is caused by the lack of a centralized, categorized and summarized presentation and analysis of strategy and decision-relevant information. Management cockpits, a kind of information center for managers, are an approach to meet the challenges of information management. They are a specific work environment for decision makers to get a quick and simple overview of the company's economic situation. In the most completely equipped premises, the entire process is supported - from acquiring information, to analysis, decision-making, and communication. Use of management cockpits, a cross-functional, KPI-based and strategyoriented controlling and management process, can be successfully established in companies as well as the work of interdisciplinary management teams, which are supported. In order to provide these possibilities, the management cockpit is equipped with a range of functionalities that allow the structuring, categorization and management-adequate visualization of information along with extensive analysis and simulation options. Management cockpits, as a communication and collaboration platform, are a starting point and valuable process companion on the way to holistic and sustainable performance management.}, language = {en} } @article{LauxConnolly2013, author = {Laux, Friedrich and Connolly, Thomas}, title = {E-Learning and self-assessment for hands-on labs in Higher European Education}, series = {International journal on advances in internet technology}, volume = {6}, journal = {International journal on advances in internet technology}, number = {3 \& 4}, organization = {International Academy, Research, and Industry Association (IARIA)}, issn = {1942-2652}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-5668}, pages = {101 -- 113}, year = {2013}, abstract = {"Learning by doing" in Higher Education in technical disciplines is mostly realized by hands-on labs. It challenges the exploratory aptitude and curiosity of a person. But, exploratory learning is hindered by technical situations that are not easy to establish and to verify. Technical skills are, however, mandatory for employees in this area. On the other side, theoretical concepts are often compromised by commercial products. The challenge is to contrast and reconcile theory with practice. Another challenge is to implement a self-assessment and grading scheme that keeps up with the scalability of e-learning courses. In addition, it should allow the use of different commercial products in the labs and still grade the assignment results automatically in a uniform way. In two European Union funded projects we designed, implemented, and evaluated a unique e-learning reference model, which realizes a modularized teaching concept that provides easily reproducible virtual hands-on labs. The novelty of the approach is to use software products of industrial relevance to compare with theory and to contrast different implementations. In a sample case study, we demonstrate the automated assessment for the creative database modeling and design task. Pilot applications in several European countries demonstrated that the participants gained highly sustainable competences that improved their attractiveness for employment.}, language = {en} } @inproceedings{HermannMartinezMadridSeepold2015, author = {Hermann, Matthias and Mart{\´i}nez Madrid, Natividad and Seepold, Ralf}, title = {Detection of variations in holter ECG recordings based on dynamic cluster analysis}, series = {Intelligent decision Technologies : Proceedings of the 7th KES International Conference on Intelligent Decision Technologies (KES-IDT 2015)}, booktitle = {Intelligent decision Technologies : Proceedings of the 7th KES International Conference on Intelligent Decision Technologies (KES-IDT 2015)}, editor = {Neves-Silva, Rui}, publisher = {Springer}, address = {Cham}, isbn = {978-331-91985-7-6}, doi = {10.1007/978-3-319-19857-6_19}, pages = {209 -- 217}, year = {2015}, abstract = {The proposed approach applies current unsupervised clustering approaches in a different dynamic manner. Instead of taking all the data as input and finding clusters among them, the given approach clusters Holter ECG data (longterm electrocardiography data from a holter monitor) on a given interval which enables a dynamic clustering approach (DCA). Therefore advanced clustering techniques based on the well known Dynamic TimeWarping algorithm are used. Having clusters e.g. on a daily basis, clusters can be compared by defining cluster shape properties. Doing this gives a measure for variation in unsupervised cluster shapes and may reveal unknown changes in healthiness. Embedding this approach into wearable devices offers advantages over the current techniques. On the one hand users get feedback if their ECG data characteristic changes unforeseeable over time which makes early detection possible. On the other hand cluster properties like biggest or smallest cluster may help a doctor in making diagnoses or observing several patients. Further, on found clusters known processing techniques like stress detection or arrhythmia classification may be applied.}, language = {en} } @inproceedings{MoehringSchmidtHaertingetal.2015, author = {M{\"o}hring, Michael and Schmidt, Rainer and H{\"a}rting, Ralf-Christian and B{\"a}r, Florian and Zimmermann, Alfred}, title = {Classification framework for context data from business processes}, series = {Business Process Management Workshops : BPM 2014 International Workshops, Eindhoven, The Netherlands, September 7-8, 2014, Revised Papers}, booktitle = {Business Process Management Workshops : BPM 2014 International Workshops, Eindhoven, The Netherlands, September 7-8, 2014, Revised Papers}, editor = {Fournier, Fabiana}, publisher = {Springer}, address = {Cham}, isbn = {978-331-91589-5-2}, doi = {10.1007/978-3-319-15895-2_37}, pages = {440 -- 445}, year = {2015}, abstract = {New business concepts such as Enterprise 2.0 foster the use of social software in enterprises. Especially social production significantly increases the amount of data in the context of business processes. Unfortunately, these data are still an unearthed treasure in many enterprises. Due to advances in data processing such as Big Data, the exploitation of context data becomes feasible. To provide a foundation for the methodical exploitation of context data, this paper introduces a classification, based on two classes, intrinsic and extrinsic data.}, language = {en} } @inproceedings{SchmidtZimmermannMoehringetal.2015, author = {Schmidt, Rainer and Zimmermann, Alfred and M{\"o}hring, Michael and Jugel, Dierk and B{\"a}r, Florian and Schweda, Christian}, title = {Social-software-based support for enterprise architecture management processes}, series = {Business Process Management Workshops : BPM 2014 International Workshops, Eindhoven, The Netherlands, September 7-8, 2014, Revised Papers}, booktitle = {Business Process Management Workshops : BPM 2014 International Workshops, Eindhoven, The Netherlands, September 7-8, 2014, Revised Papers}, editor = {Fournier, Fabiana and Mendling, Jan}, publisher = {Springer}, address = {Cham}, isbn = {978-331-91589-5-2}, doi = {10.1007/978-3-319-15895-2_39}, pages = {452 -- 462}, year = {2015}, abstract = {Modern enterprises reshape and transform continuously by a multitude of management processes with different perspectives. They range from business process management to IT service management and the management of the information systems. Enterprise Architecture (EA) management seeks to provide such a perspective and to align the diverse management perspectives. Therefore, EA management cannot rely on hierarchic - in a tayloristic manner designed - management processes to achieve and promote this alignment. It, conversely, has to apply bottom-up, information-centered coordination mechanisms to ensure that different management processes are aligned with each other and enterprise strategy. Social software provides such a bottom-up mechanism for providing support within EAM-processes. Consequently, challenges of EA management processes are investigated, and contributions of social software presented. A cockpit provides interactive functions and visualization methods to cope with this complexity and enable the practical use of social software in enterprise architecture management processes.}, language = {en} } @inproceedings{SchmidtMoehringHaertingetal.2015, author = {Schmidt, Rainer and M{\"o}hring, Michael and H{\"a}rting, Ralf-Christian and Zimmermann, Alfred and Heitmann, Jan and Blum, Franziska}, title = {Leveraging textual information for improving decision making in the business process lifecycle}, series = {Intelligent Decision Technologies : Proceedings of the 7th KES International Conference on Intelligent Decision Technologies (KES-IDT 2015)}, booktitle = {Intelligent Decision Technologies : Proceedings of the 7th KES International Conference on Intelligent Decision Technologies (KES-IDT 2015)}, editor = {Neves-Silva, Rui}, publisher = {Springer}, address = {Cham}, isbn = {978-331-91985-7-6}, doi = {10.1007/978-3-319-19857-6_48}, pages = {563 -- 574}, year = {2015}, abstract = {Business process implementations fail, because requirements are elicited incompletely. At the same time, a huge amount of unstructured data is not used for decision-making during the business process lifecycle. Data from questionnaires and interviews is collected but not exploited because the effort doing so is too high. Therefore, this paper shows how to leverage textual information for improving decision making in the business process lifecycle. To do so, text mining is used for analyzing questionnaires and interviews.}, language = {en} } @inproceedings{ZimmermannJugelSchmidtetal.2015, author = {Zimmermann, Alfred and Jugel, Dierk and Schmidt, Rainer and Schweda, Christian and M{\"o}hring, Michael}, title = {Collaborative decision support for adaptive digital enterprise architecture}, series = {Joint Proceedings of the BIR 2015 Workshops and Doctoral Consortium (BIR-WS 2015), Tartu, Estonia, August 26-28, 2015 : CEUR workshop proceedings ; 1420}, booktitle = {Joint Proceedings of the BIR 2015 Workshops and Doctoral Consortium (BIR-WS 2015), Tartu, Estonia, August 26-28, 2015 : CEUR workshop proceedings ; 1420}, editor = {Matulevičius, Raimundas}, publisher = {RWTH}, address = {Aachen}, issn = {1613-0073}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-5784}, pages = {24 -- 35}, year = {2015}, abstract = {The digitization of our society changes the way we live, work, learn, communicate, and collaborate. This disruptive change interacts with all information processes and systems that are important business enablers for the context of digitization since years. Our aim is to support flexibility and agile transformations for both business domains and related information technology and enterprise systems through adaptation and evolution of digital enterprise architectures. The present research paper investigates collaborative decision mechanisms for adaptive digital enterprise architectures by extending original architecture reference models with state of art elements for agile architectural engineering for the digitization and collaborative architectural decision support.}, language = {en} } @inproceedings{ZimmermannSchmidtSandkuhletal.2015, author = {Zimmermann, Alfred and Schmidt, Rainer and Sandkuhl, Kurt and Wißotzki, Matthias and Jugel, Dierk and M{\"o}hring, Michael}, title = {Digital enterprise architecture - transformation for the Internet of Things}, series = {19th IEEE International Enterprise Distributed Object Computing Conference workshops, EDOCW 2015 : 22-25 September 2015, Adelaide, Australia : proceedings}, booktitle = {19th IEEE International Enterprise Distributed Object Computing Conference workshops, EDOCW 2015 : 22-25 September 2015, Adelaide, Australia : proceedings}, editor = {Kolb, Jens}, publisher = {IEEE}, address = {Piscataway, NJ}, isbn = {978-1-4673-9331-7}, doi = {10.1109/EDOCW.2015.16}, pages = {130 -- 138}, year = {2015}, abstract = {Excellence in IT is both a driver and a key enabler of the digital transformation. The digital transformation changes the way we live, work, learn, communicate, and collaborate. The Internet of Things (IoT) fundamentally influences today's digital strategies with disruptive business operating models and fast changing markets. New business information systems are integrating emerging Internet of Things infrastructures and components. With the huge diversity of Internet of Things technologies and products organizations have to leverage and extend previous Enterprise Architecture efforts to enable business value by integrating Internet of Things architectures. Both architecture engineering and management of current information systems and business models are complex and currently integrating beside the Internet of Things synergistic subjects, like Enterprise Architecture in context with services \& cloud computing, semantic-based decision support through ontologies and knowledge-based systems, big data management, as well as mobility and collaboration networks. To provide adequate decision support for complex business/IT environments, we have to make transparent the impact of business and IT changes over the integral landscape of affected architectural capabilities, like directly and transitively impacted IoT-objects, business categories, processes, applications, services, platforms and infrastructures. The paper describes a new metamodel-based approach for integrating Internet of Things architectural objects, which are semi-automatically federated into a holistic Digital Enterprise Architecture environment.}, language = {en} } @inproceedings{SchmidtMoehringHaertingetal.2015, author = {Schmidt, Rainer and M{\"o}hring, Michael and H{\"a}rting, Ralf-Christian and Reichstein, Christopher and Zimmermann, Alfred and Luceri, Sandro}, title = {Benefits of enterprise architecture management - insights from European experts}, series = {The Practice of Enterprise Modeling : 8th IFIP WG 8.1. Working Conference, PoEM 2015, Valencia, Spain, November 10-12, 2015, Proceedings}, booktitle = {The Practice of Enterprise Modeling : 8th IFIP WG 8.1. Working Conference, PoEM 2015, Valencia, Spain, November 10-12, 2015, Proceedings}, editor = {Ralyt{\´e}, Jolita}, publisher = {Springer}, address = {Cham}, isbn = {978-3-319-25897-3}, doi = {10.1007/978-3-319-25897-3_15}, pages = {223 -- 236}, year = {2015}, abstract = {Excellence in IT is a key enabler for the digital transformation of enterprises. To realize the vision of digital enterprises it is necessary to cope with changing business requirements and to align business and IT. In order to evaluate the contribution of enterprise architecture management to these goals, our paper explores the impact of various factors to the perceived benefit of EAM in enterprises. Based on literature, we build an empirical research model. It is tested with empirical data of European EAM experts using a structural equation modelling approach. It is shown that changing business requirements, IT business alignment, the complexity of information technology infrastructure as well as enterprise architecture knowledge of information technology employees are crucial impact factors to the perceived benefit of EAM in enterprises.}, language = {en} } @inproceedings{PillerZimmermannSandkuhletal.2015, author = {Piller, Gunther and Zimmermann, Alfred and Sandkuhl, Kurt and Schmidt, Rainer and Steffens, Ulrike and Bossert, Oliver}, title = {Digital Enterprise Architectures}, series = {Informatik 2015 - Informatik, Energie und Umwelt; 28.9. - 2.10.2015 in Cottbus}, booktitle = {Informatik 2015 - Informatik, Energie und Umwelt; 28.9. - 2.10.2015 in Cottbus}, editor = {Cunningham, Douglas William}, publisher = {Gesellschaft f{\"u}r Informatik}, address = {Bonn}, isbn = {978-3-88579-640-4}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-5855}, pages = {853}, year = {2015}, abstract = {Neue Modelle f{\"u}r digitale Unternehmensarchitekturen mit Big Data, Services \& Cloud Computing, mobilen Systemen, Internet of Things sowie Industrie 4.0 {\"O}kosystemen machen eine enge Kooperation verschiedener Partner aus Wissenschaft, Anwendungsunternehmen, {\"o}ffentlichen Organisationen, Softwarehersteller und IT- Dienstleister notwendig. Ziel dieser Zusammenarbeit ist die Zusammenf{\"u}hrung neuer Konzepte und M{\"o}glichkeiten der Informationstechnologie zur bestm{\"o}glichen Unterst{\"u}tzung sich ver{\"a}ndernder Unternehmensziele und -strategien. Software- und Unternehmensarchitekturen spielen hierbei eine zentrale Rolle. So werden Anforderungen bez{\"u}glich Flexibilit{\"a}t und Agilit{\"a}t in digitalen Unternehmen wesentlich durch serviceorientierte Ans{\"a}tze unterst{\"u}tzt. Der Ordnungsgrad und die kosteneffiziente Gestaltung komplexer IT-Landschaften soll durch Digital Enterprise Architecture Management deutlich verbessert werden - passend zu neuen M{\"o}glichkeiten von Services \& Cloud Computing, Big Data, sowie kollaborativen Gesch{\"a}ftsprozessen.}, language = {de} } @inproceedings{OPUS4-586, title = {Digital Enterprise Computing (DEC 2015) : June 25 - 26, 2015, B{\"o}blingen, Germany}, editor = {Zimmermann, Alfred and Rossmann, Alexander}, publisher = {Gesellschaft f{\"u}r Informatik}, address = {Bonn}, isbn = {978-3-88579-638-1}, pages = {280}, year = {2015}, abstract = {Das digitale Unternehmen erfordert neue Konzepte des Digital Enterprise Computing. Dieses umfasst eine interdisziplin{\"a}re Verbindung von Vorgehensweisen aus der Informatik, der {\"O}konomie und weiteren relevanten Wissenschaftsdisziplinen. Neue Architekturen mit integrierten Mobility-Systemen, kollaborativen Gesch{\"a}ftsprozessen, Big Data und Cloud-{\"O}kosystemen befl{\"u}geln aktuelle und k{\"u}nftige Gesch{\"a}ftsstrategien und machen die digitale Transformation zu neuen Gesch{\"a}ftsfeldern erst m{\"o}glich. Daf{\"u}r ist eine enge Kooperation verschiedener Partner aus Wissenschaft, Wirtschaft und Gesellschaft notwendig. Die Jahreskonferenz Digital Enterprise Computing positioniert die Gesellschaft f{\"u}r Informatik als wissenschaftlichen Mitveranstalter und vertieft Erfahrungen aus dem Arbeitskreis Enterprise Architecture Management der Fachgruppe Architekturen im Fachbereich Softwaretechnik der Gesellschaft f{\"u}r Informatik.}, language = {de} } @book{SchiesserSchmollinger2015, author = {Schießer, Marcus and Schmollinger, Martin}, title = {Workshop Java EE 7 : ein praktischer Einstieg in die Java Enterprise Edition mit dem Web Profile}, edition = {2., aktualisierte und erweiterte Auflage}, publisher = {dpunkt-Verlag}, address = {Heidelberg}, isbn = {978-3-86490-195-9}, pages = {389}, year = {2015}, abstract = {Dieses Arbeitsbuch bietet Ihnen eine praktische Einf{\"u}hrung in die Entwicklung von Business- Anwendungen mit Java EE 7. Schrittweise erstellen Sie eine einfach nachvollziehbare Beispielanwendung auf Grundlage des Web Profile. Dabei lernen Sie alle wichtigen Technologien und Konzepte von Java EE 7 kennen, u.a.: Grafische Oberfl{\"a}chen mit JavaServer Faces und HTML5; Business-Logik mit CDI und EJB; Persistenz mit JPA; Kommunikation mit REST, SOAP und WebSockets; Erweiterte Konzepte wie Resource Library Contracts, Interceptors, Transaktionen, Timer und Security. {\"U}ber Java EE 7 hinaus wird auch auf weitere praxisrelevante Themen wie Build Management und Testing eingegangen. Das Deployment wird auf den Applikationsservern WildFly 8 und Glassfish 4 sowie {\"u}ber das Cloud-Angebot OpenShift durchgef{\"u}hrt. Am Ende einer jeden Entwicklungsphase finden Sie {\"U}bungen und Fragen zur Lernkontrolle.Nach der erfolgreichen Lekt{\"u}re sind Sie in der Lage, Java-EE-7-Anwendungen selbst{\"a}ndig aufzusetzen, zu entwickeln und auf einem Anwendungsserver zu verteilen. Kenntnisse in der Entwicklung mit Java werden vorausgesetzt. Grundlagen von HTML und der Architektur von Webanwendungen sind hilfreich. In der 2. Auflage wird nun auch die Internationalisierung sowie die Erstellung funktionaler Tests mit Graphene behandelt.}, language = {de} } @inproceedings{OPUS4-391, title = {DBKDA 2015, the Seventh International Conference on Advances in Databases, Knowledge, and Data Applications : GraphSM 2015, the Second International Workshop on Large-Scale Graph Storage and Management ; May 24 - 29, 2015, Rome, Italy}, editor = {Laux, Friedrich and Schmidt, Andreas and Del Pilar Angeles, Maria and Nitta, Kiyoshi and Savnik, Iztok}, organization = {International Academy, Research, and Industry Association (IARIA)}, isbn = {978-1-61208-408-4}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-3915}, pages = {184}, year = {2015}, abstract = {The Seventh International Conference on Advances in Databases, Knowledge, and Data Applications (DBKDA 2015), held between May 24-29, 2015 in Rome, Italy, continued a series of international events covering a large spectrum of topics related to advances in fundamentals on databases, evolution of relation between databases and other domains, data base Technologies and content processing, as well as specifics in applications domains databases. Advances in different technologies and domains related to databases triggered substantial improvements for content processing, information indexing, and data, process and knowledge mining. The push came from Web services, artificial intelligence, and Agent technologies, as well as from the generalization of the XML adoption. High-speed communications and computations, large storage capacities, and loadbalancing for distributed databases access allow new approaches for content processing with incomplete patterns, advanced ranking algorithms and advanced indexing methods. Evolution on e-business, e-health and telemedicine, bioinformatics, finance and marketing, geographical positioning systems put pressure on database communities to push the 'de facto' methods to support new requirements in terms of scalability, privacy, performance, indexing, and heterogeneity of both content and technology.}, language = {en} } @inproceedings{SchaidnagelLaux2014, author = {Schaidnagel, Michael and Laux, Friedrich}, title = {Feature construction for time ordered data sequences}, series = {DBKDA 2013, the Fifth International Conference on Advances in Databases, Knowledge, and Data Applications : January 27 - February 1, 2013, Seville, Spain}, booktitle = {DBKDA 2013, the Fifth International Conference on Advances in Databases, Knowledge, and Data Applications : January 27 - February 1, 2013, Seville, Spain}, editor = {Laux, Friedrich and Schmidt, Andreas and Nitta, Kiyoshi and Savnik, Iztok}, organization = {International Academy, Research, and Industry Association (IARIA)}, isbn = {978-1-61208-334-6}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-3921}, pages = {1 -- 6}, year = {2014}, abstract = {The recent years and especially the Internet have changed the way on how data is stored. We now often store data together with its creation time-stamp. These data sequences potentially enable us to track the change of data over time. This is quite interesting, especially in the e-commerce area, in which classification of a sequence of customer actions, is still a challenging task for data miners. However, before Standard algorithms such as Decision Trees, Neuronal Nets, Naive Bayes or Bayesian Belief Networks can be applied on sequential data, preparations need to be done in order to capture the information stored within the sequences. Therefore, this work presents a systematic approach on how to reveal sequence patterns among data and how to construct powerful features out of the primitive sequence attributes. This is achieved by sequence aggregation and the incorporation of time dimension into the Feature construction step. The proposed algorithm is described in detail and applied on a real life data set, which demonstrates the ability of the proposed algorithm to boost the classification performance of well known data mining algorithms for classification tasks.}, language = {en} } @inproceedings{LessnerLauxConnolly2015, author = {Lessner, Tim and Laux, Friedrich and Connolly, Thomas}, title = {O|R|P|E - A data semantics driven concurrency control mechanism}, series = {DBKDA 2015, the Seventh International Conference on Advances in Databases, Knowledge, and Data Applications : GraphSM 2015, the Second International Workshop on Large-Scale Graph Storage and Management ; May 24 - 29, 2015, Rome, Italy}, booktitle = {DBKDA 2015, the Seventh International Conference on Advances in Databases, Knowledge, and Data Applications : GraphSM 2015, the Second International Workshop on Large-Scale Graph Storage and Management ; May 24 - 29, 2015, Rome, Italy}, editor = {Laux, Friedrich and Schmidt, Andreas and Del Pilar Angeles, Maria and Savnik, Iztok}, organization = {International Academy, Research, and Industry Association (IARIA)}, isbn = {978-1-61208-408-4}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-4029}, pages = {147 -- 152}, year = {2015}, abstract = {This paper presents a concurrency control mechanism that does not follow a 'one concurrency control mechanism fits all needs' strategy. With the presented mechanism a transaction runs under several concurrency control mechanisms and the appropriate one is chosen based on the accessed data. For this purpose, the data is divided into four classes based on its access type and usage (semantics). Class O (the optimistic class) implements a first-committer-wins strategy, class R (the reconciliation class) implements a first-n-committers-win strategy, class P (the pessimistic class) implements a first reader-wins strategy, and class E (the escrow class) implements a firsnreaderswin strategy. Accordingly, the model is called OjRjPjE. Under this model the TPC-C benchmark outperforms other CC mechanisms like optimistic Snapshot Isolation.}, language = {en} } @inproceedings{GonenFangElSheikhetal.2014, author = {Gonen, Bilal and Fang, Xingang and El-Sheikh, Eman and Bagui, Sikha and Wilde, Norman and Zimmermann, Alfred and Petrov, Ilia}, title = {Maintaining SOA systems of the future : how can ontological modeling help?}, series = {Proceedings of the International Conference on Knowledge Engineering and Ontology Development : Rome, Italy, 21 - 24 October 2014}, booktitle = {Proceedings of the International Conference on Knowledge Engineering and Ontology Development : Rome, Italy, 21 - 24 October 2014}, editor = {Filipe, Joaquim}, organization = {Institute for Systems and Technologies of Information, Control and Communication}, isbn = {978-989-758-049-9}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-4329}, pages = {376 -- 381}, year = {2014}, abstract = {Many future Services Oriented Architecture (SOA) systems may be pervasive SmartLife applications that provide real-time support for users in everyday tasks and situations. Development of such applications will be challenging, but in this position paper we argue that their ongoing maintenance may be even more so. Ontological modelling of the application may help to ease this burden, but maintainers need to understand a system at many levels, from a broad architectural perspective down to the internals of deployed components. Thus we will need consistent models that span the range of views, from business processes through system architecture to maintainable code. We provide an initial example of such a modelling approach and illustrate its application in a semantic browser to aid in software maintenance tasks.}, language = {en} } @inproceedings{SchmidtMoehringWissotzkietal.2014, author = {Schmidt, Rainer and M{\"o}hring, Michael and Wißotzki, Matthias and Sandkuhl, Kurt and Jugel, Dierk and Zimmermann, Alfred}, title = {Towards a framework for enterprise architecture analytics}, series = {2014 IEEE 18th International Enterprise Distributed Object Computing Conference workshops and demonstrations (EDOCW 2014) : Ulm, Germany, 1 - 2 September 2014}, booktitle = {2014 IEEE 18th International Enterprise Distributed Object Computing Conference workshops and demonstrations (EDOCW 2014) : Ulm, Germany, 1 - 2 September 2014}, publisher = {IEEE}, address = {Piscataway, NJ}, isbn = {978-1-4799-5468-1}, doi = {10.1109/EDOCW.2014.47}, pages = {266 -- 275}, year = {2014}, abstract = {Current approaches for enterprise architecture lack analytical instruments for cyclic evaluations of business and system architectures in real business enterprise system environments. This impedes the broad use of enterprise architecture methodologies. Furthermore, the permanent evolution of systems desynchronizes quickly model representation and reality. Therefore we are introducing an approach for complementing the existing top-down approach for the creation of enterprise architecture with a bottom approach. Enterprise Architecture Analytics uses the architectural information contained in many infrastructures to provide architectural information. By applying Big Data technologies it is possible to exploit this information and to create architectural information. That means, Enterprise Architectures may be discovered, analyzed and optimized using analytics. The increased availability of architectural data also improves the possibilities to verify the compliance of Enterprise Architectures. Architectural decisions are linked to clustered architecture artifacts and categories according to a holistic EAM Reference Architecture with specific architecture metamodels. A special suited EAM Maturity Framework provides the base for systematic and analytics supported assessments of architecture capabilities.}, language = {en} } @inproceedings{ZimmermannSandkuhlSchmidtetal.2014, author = {Zimmermann, Alfred and Sandkuhl, Kurt and Schmidt, Rainer and Jugel, Dierk and Wisotzki, Matthias and M{\"o}hring, Michael}, title = {Adaptive digitale Enterprise Architekturen f{\"u}r Big Data und Cloud-Systeme}, series = {Informatik 2014 : Big Data - Komplexit{\"a}t meistern ; Tagung der Gesellschaft f{\"u}r Informatik, 22. - 26. September 2014 in Stuttgart, Deutschland}, booktitle = {Informatik 2014 : Big Data - Komplexit{\"a}t meistern ; Tagung der Gesellschaft f{\"u}r Informatik, 22. - 26. September 2014 in Stuttgart, Deutschland}, editor = {Pl{\"o}dereder, Erhard}, publisher = {Gesellschaft f{\"u}r Informatik}, address = {Bonn}, isbn = {978-3-88579-626-8}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-4374}, pages = {417 -- 428}, year = {2014}, abstract = {Big Data und Cloud Systeme werden zunehmend von mobilen, benutzerzentrierten und agil ver{\"a}nderbaren Informationssystemen im Kontext von digitalen sozialen Netzwerken genutzt. Metaphern aus der Biologie f{\"u}r lebendige und selbstheilende Systeme und Umgebungen liefern die Basis f{\"u}r intelligente adaptive Informationssysteme und f{\"u}r zugeh{\"o}rige serviceorientierte digitale Unternehmensarchitekturen. Wir berichten {\"u}ber unsere Forschungsarbeiten {\"u}ber Strukturen und Mechanismen adaptiver digitaler Unternehmensarchitekturen f{\"u}r die Entwicklung und Evolution von serviceorientierten {\"O}kosystemen und deren Technologien wie Big Data, Services \& Cloud Computing, Web Services und Semantikunterst{\"u}tzung. F{\"u}r unsere aktuellen Forschungsarbeiten nutzen wir praxisrelevante SmartLife Szenarien f{\"u}r die Entwicklung, Wartung und Evolution zukunftsgerechter serviceorientierter Informationssysteme. Diese Systeme nutzen eine stark wachsende Zahl externer und interner Services und fokussieren auf die Besonderheiten der Weiterentwicklung der Informationssysteme f{\"u}r integrierte Big Data und Cloud Kontexte. Unser Forschungsansatz besch{\"a}ftigt sich mit der systematischen und ganzheitlichen Modellbildung adaptiver digitaler Unternehmensarchitekturen - gem{\"a}ß standardisierter Referenzmodelle und auf Standards aufsetzenden Referenzarchitekturen, die f{\"u}r besondere Einsatzszenarien auch bei kleineren Anwendungskontexten oder an neue Kontexte einfacher adaptiert werden k{\"o}nnen. Um Semantik-gest{\"u}tzte Analysen zur Entscheidungsunterst{\"u}tzung von System- und Unternehmensarchitekten zu erm{\"o}glichen, erweitern wir unser bisheriges Referenzmodell f{\"u}r ITUnternehmensarchitekturen ESARC - Enterprise Services Architecture Reference Cube - um agile Mechanismen der Adaption und Konsistenzbehandlung sowie die zugeh{\"o}rigen Metamodelle und Ontologien f{\"u}r Digitale Enterprise Architekturen um neue Aspekte wie Big Data und Cloud Kontexte.}, language = {de} } @inproceedings{ZimmermannSchmidtMoehringetal.2014, author = {Zimmermann, Alfred and Schmidt, Rainer and M{\"o}hring, Michael and H{\"a}rting, Ralf-Christian and Graule, Andreas and Schwarzer, Marius and Goßen, Kristian}, title = {Datenzentrierte Unternehmensarchitekturen im Bekleidungseinzelhandel}, series = {Informatik 2014 : Big Data - Komplexit{\"a}t meistern ; Tagung der Gesellschaft f{\"u}r Informatik, 22. - 26. September 2014 in Stuttgart, Deutschland}, booktitle = {Informatik 2014 : Big Data - Komplexit{\"a}t meistern ; Tagung der Gesellschaft f{\"u}r Informatik, 22. - 26. September 2014 in Stuttgart, Deutschland}, editor = {Pl{\"o}dereder, Erhard}, publisher = {Gesellschaft f{\"u}r Informatik}, address = {Bonn}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-4387}, pages = {405 -- 416}, year = {2014}, abstract = {Der lokale Bekleidungseinzelhandel steht unter immer st{\"a}rkerem Konkurrenzdruck durch Versandunternehmen. Zus{\"a}tzlich bestehen durch gewachsene Architekturen eine Reihe von Wachstumshemmnissen. Daher sollen hier eine Reihe von Ans{\"a}tzen zur Gestaltung datenzentrierter Unternehmensarchitekturen f{\"u}r den Bekleidungseinzelhandel vorgestellt werden. Sie basieren auf dem Einsatz von RFID zur Gewinnung von Kundenprofilen in den Niederlassungen und dem Einsatz von Big-Data basierten Auswertungs- und Analysemechanismen. Mit den vorgestellten Konzepten ist es Unternehmen des Bekleidungseinzelhandels m{\"o}glich, {\"a}hnlich wie Versandunternehmen, individuelle Ansprachen des Kunden und Angebote zu entwickeln}, language = {de} } @inproceedings{ZimmermannPillerKarastoyanovaetal.2014, author = {Zimmermann, Alfred and Piller, Gunther and Karastoyanova, Dimka and Bossert, Oliver and Steffens, Ulrike and Schmidt, Rainer}, title = {Enterprise Architekturen f{\"u}r Big Data \& Cloud}, series = {Informatik 2014 : Big Data - Komplexit{\"a}t meistern ; Tagung der Gesellschaft f{\"u}r Informatik, 22. - 26. September 2014 in Stuttgart, Deutschland}, booktitle = {Informatik 2014 : Big Data - Komplexit{\"a}t meistern ; Tagung der Gesellschaft f{\"u}r Informatik, 22. - 26. September 2014 in Stuttgart, Deutschland}, editor = {Pl{\"o}dereder, Erhard}, publisher = {Gesellschaft f{\"u}r Informatik}, address = {Bonn}, isbn = {978-3-88579-626-8}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-4406}, pages = {401 -- 404}, year = {2014}, language = {de} } @article{JugelSchwedaZimmermannetal.2015, author = {Jugel, Dierk and Schweda, Christian and Zimmermann, Alfred and L{\"a}ufer, Sandra}, title = {Tool capability in visual EAM analytics}, series = {Complex systems informatics and modeling quarterly}, journal = {Complex systems informatics and modeling quarterly}, number = {2}, publisher = {Riga Technical University}, address = {Riga}, doi = {10.7250/csimq.2015-2.04}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-5013}, pages = {46 -- 55}, year = {2015}, abstract = {Enterprise Architectures (EA) consist of a multitude of architecture elements, which relate in manifold ways to each other. As the change of a single element hence impacts various other elements, mechanisms for architecture analysis are important to stakeholders. The high number of relationships aggravates architecture analysis and makes it a complex yet important task. In practice EAs are often analyzed using visualizations. This article contributes to the field of visual analytics in enterprise architecture management (EAM) by reviewing how state-of-the-art software platforms in EAM support stakeholders with respect to providing and visualizing the "right" information for decision-making tasks. We investigate the collaborative decision-making process in an experiment with master students using professional EAM tools by developing a research study. We evaluate the students' findings by comparing them with the experience of an enterprise architect.}, language = {en} } @incollection{BaerSchmidtMoehringetal.2014, author = {B{\"a}r, Florian and Schmidt, Rainer and M{\"o}hring, Michael and Zimmermann, Alfred and Jugel, Dierk}, title = {A configuration-management-database driven approach for fabric-process specification and automation}, series = {On the move to meaningful internet systems: OTM 2014 workshops : proceedings ; Amantea, Italy, October 27 - 31, 2014}, booktitle = {On the move to meaningful internet systems: OTM 2014 workshops : proceedings ; Amantea, Italy, October 27 - 31, 2014}, editor = {Meersman, Robert}, publisher = {Springer}, address = {Berlin}, isbn = {978-366-24555-0-0}, doi = {10.1007/978-3-662-45550-0_21}, pages = {202 -- 209}, year = {2014}, abstract = {In this paper we describe an approach that integrates a Configuration- Management-Database into fabric-process specification and automation in order to consider different conditions regarding to cloud-services. By implementing our approach, the complexity of fabric processes gets reduced. We developed a prototype by using formal prototyping principles as research methods and integrated the Configuration-Management-Database Command into the Workflow- Management-System Activiti. We used this prototype to evaluate our approach. We implemented three different fabric-processes and show that by using our approach the complexity of these three fabric-processes gets reduced.}, language = {en} } @inproceedings{SchaidnagelAbeleLauxetal.2013, author = {Schaidnagel, Michael and Abele, Christian and Laux, Friedrich and Petrov, Ilia}, title = {Sales prediction with parametrized time series analysis}, series = {DBKDA 2013, the Fifth International Conference on Advances in Databases, Knowledge, and Data Applications : January 27 - February 1, 2013, Seville, Spain}, booktitle = {DBKDA 2013, the Fifth International Conference on Advances in Databases, Knowledge, and Data Applications : January 27 - February 1, 2013, Seville, Spain}, editor = {Laux, Friedrich and Str{\"o}mb{\"a}ck, Lena}, organization = {International Academy, Research, and Industry Association (IARIA)}, isbn = {978-1-61208-247-9}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-4522}, pages = {166 -- 173}, year = {2013}, abstract = {When forecasting sales figures, not only the sales history but also the future price of a product will influence the sales quantity. At first sight, multivariate time series seem to be the appropriate model for this task. Nontheless, in real life history is not always repeatable, i.e. in the case of sales history there is only one price for a product at a given time. This complicates the design of a multivariate time series. However, for some seasonal or perishable products the price is rather a function of the expiration date than of the sales history. This additional information can help to design a more accurate and causal time series model. The proposed solution uses an univariate time series model but takes the price of a product as a parameter that influences systematically the prediction. The price influence is computed based on historical sales data using correlation analysis and adjustable price ranges to identify products with comparable history. Compared to other techniques this novel approach is easy to compute and allows to preset the price parameter for predictions and simulations. Tests with data from the Data Mining Cup 2012 demonstrate better results than established sophisticated time series methods.}, language = {en} } @inproceedings{ZimmermannGonenSchmidtetal.2014, author = {Zimmermann, Alfred and Gonen, Bilal and Schmidt, Rainer and El-Sheikh, Eman and Bagui, Sikha and Wilde, Norman}, title = {Adaptable enterprise architectures for software evolution of smartlife ecosystems}, series = {2014 IEEE 18th International Enterprise Distributed Object Computing Conference workshops and demonstrations (EDOCW) : 1 - 2 Sept. 2014, Ulm, Germany}, booktitle = {2014 IEEE 18th International Enterprise Distributed Object Computing Conference workshops and demonstrations (EDOCW) : 1 - 2 Sept. 2014, Ulm, Germany}, editor = {Grossmann, Georg}, publisher = {IEEE}, address = {Piscataway, NJ}, organization = {Institute of Electrical and Electronics Engineers}, isbn = {978-1-4799-5468-1}, doi = {10.1109/EDOCW.2014.52}, pages = {316 -- 323}, year = {2014}, abstract = {SmartLife ecosystems are emerging as intelligent user-centered systems that will shape future trends in technology and communication. Biological metaphors of living adaptable ecosystems provide the logical foundation for self-optimizing and self-healing run-time environments for intelligent adaptable business services and related information systems with service-oriented enterprise architectures. The present research in progress work investigates mechanisms for adaptable enterprise architectures for the development of service-oriented ecosystems with integrated technologies like Semantic Technologies, Web Services, Cloud Computing and Big Data Management. With a large and diverse set of ecosystem services with different owners, our scenario of service-based SmartLife ecosystems can pose challenges in their development, and more importantly, for maintenance and software evolution. Our research explores the use of knowledge modeling using ontologies and flexible metamodels for adaptable enterprise architectures to support program comprehension for software engineers during maintenance and evolution tasks of service-based applications. Our previous reference enterprise architecture model ESARC -- Enterprise Services Architecture Reference Cube -- and the Open Group SOA Ontology was extended to support agile semantic analysis, program comprehension and software evolution for a SmartLife applications scenario. The Semantic Browser is a semantic search tool that was developed to provide knowledge-enhanced investigation capabilities for service-oriented applications and their architectures.}, language = {en} } @inproceedings{ClinLeitritzDietteretal.2014, author = {Clin, Lucien and Leitritz, Martin and Dietter, Johannes and Thies, Christian}, title = {A web-based software architecture and framework for integration of an ophthalmologic reading center in large scale multi-center studies}, series = {GMDS 2014 : 59. Jahrestagung der Deutschen Gesellschaft f{\"u}r Medizinische Informatik, Biometrie und Epidemiologie e.V. (GMDS), G{\"o}ttingen, 07.-10.09.2014}, booktitle = {GMDS 2014 : 59. Jahrestagung der Deutschen Gesellschaft f{\"u}r Medizinische Informatik, Biometrie und Epidemiologie e.V. (GMDS), G{\"o}ttingen, 07.-10.09.2014}, publisher = {German Medical Science Publishing House}, address = {D{\"u}sseldorf}, doi = {10.3205/14gmds043}, year = {2014}, abstract = {In this work, a web-based software architecture and framework for management and diagnosis of large amounts of medical data in an ophthalmologic reading center is proposed. Data management for multi-center studies requires merging of standing data and repeatedly gathered clinical evidence such as vital signs and raw data. If ophthalmologic questions are involved the data acquisition is often provided by non-medical staff at the point of care or a study center, whereas the medical finding is mostly provided by an ophthalmologist in a specialized reading center. The study data such as participants, cohorts and measured values are administrated at a single data center for the entire study. Since a specialized reading center maintains several studies, the medical staff must learn the different data administration for the different data center. With respect to the increasing number and sizes of clinical studies, two aspects must be considered. At first, an efficient software framework is required to support the data management, processing and diagnosis by medical experts at the reading center. In the second place, this software needs a standardized user-interface that has not to be trained/taylore /adapted for each new study. Furthermore different aspects of quality and security controls have to be included. Therefore, the objective of this work is to establish a multi purpose ophthalmologic reading center, which can be connected to different data centers via configurable data interfaces in order to treat various topics simultaneously.}, language = {en} } @inproceedings{MoogYilmazBaechleetal.2014, author = {Moog, Jussi and Yilmaz, M. and B{\"a}chle, S. and Thies, Christian}, title = {Software Requirements and Prototype Development of a Web Application for Quality Assurance (QA) in Radiation Therapy - a QAlender}, series = {Joint Conference of the SSRMP, DGMP, {\"O}GMP : Dreil{\"a}ndertagung der Medizinischen Physik ; Abstractbook}, booktitle = {Joint Conference of the SSRMP, DGMP, {\"O}GMP : Dreil{\"a}ndertagung der Medizinischen Physik ; Abstractbook}, editor = {Kl{\"o}ck, Stephan}, publisher = {Deutsche Gesellschaft f{\"u}r Medizinische Physik}, address = {Berlin}, isbn = {978-3-9816508-5-3}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-3567}, pages = {437 -- 438}, year = {2014}, abstract = {The implementation of a web based portal QA solution will lead to a high acceptance of the staff as the usage of commonly known standard software (e.g. web browser) allows intuitive handling. In the daily use a significant simplification of the workflow and Performance enhancement can be achieved by easy access to the check documents. As the data is now saved in a database it can easily be processed and long-term trends can be displayed. Therefore possible errors can be detected much easier and earlier. By the usage of time stamps and user authentication procedures and user responsibilities are comprehensibly documented. As the software is browser based, integration into an existing software Environment is not critical. As only technical QA data is processed, no further data security measures are necessary. A certification as a medical product is not required.}, language = {en} } @inproceedings{RissanenMuench2015, author = {Rissanen, Olli and M{\"u}nch, J{\"u}rgen}, title = {Transitioning towards continuous delivery in the B2B domain : a case study}, series = {Agile processes in software engineering and extreme programming : 16th International Conference, XP 2015, Helsinki, Finland, May 25-29, 2015, Proceedings}, booktitle = {Agile processes in software engineering and extreme programming : 16th International Conference, XP 2015, Helsinki, Finland, May 25-29, 2015, Proceedings}, editor = {Lassenius, Casper,}, publisher = {Springer}, address = {Cham}, isbn = {978-331-91861-2-2}, doi = {10.1007/978-3-319-18612-2_13}, pages = {154 -- 165}, year = {2015}, abstract = {Delivering value to customers in real-time requires companies to utilize real-time deployment of software to expose features to users faster, and to shorten the feedback loop. This allows for faster reaction and helps to ensure that the development is focused on features providing real value. Continuous delivery is a development practice where the software functionality is deployed continuously to customer environment. Although this practice has been established in some domains such as B2C mobile software, the B2B domain imposes specific challenges. This article presents a case study that is conducted in a medium-sized software company operating in the B2B domain. The objective of this study is to analyze the challenges and benefits of continuous delivery in this domain. The results suggest that technical challenges are only one part of the challenges a company encounters in this transition. The company must also address challenges related to the customer and procedures. The core challenges are caused by having multiple customers with diverse environments and unique properties, whose business depends on the software product. Some customers require to perform manual acceptance testing, while some are reluctant towards new versions. By utilizing continuous delivery, it is possible for the case company to shorten the feedback cycles, increase the reliability of new versions, and reduce the amount of resources required for deploying and testing new releases.}, language = {en} } @inproceedings{LindgrenMuench2015, author = {Lindgren, Eveliina and M{\"u}nch, J{\"u}rgen}, title = {Software development as an experiment system : a qualitative survey on the state of the practice}, series = {Agile processes in software engineering and extreme programming : 16th International Conference, XP 2015, Helsinki, Finland, May 25-29, 2015, Proceedings}, booktitle = {Agile processes in software engineering and extreme programming : 16th International Conference, XP 2015, Helsinki, Finland, May 25-29, 2015, Proceedings}, editor = {Lassenius, Casper}, publisher = {Springer}, address = {Cham}, isbn = {978-331-91861-2-2}, doi = {10.1007/978-3-319-18612-2_10}, pages = {117 -- 128}, year = {2015}, abstract = {An experiment-driven approach to software product and service development is gaining increasing attention as a way to channel limited resources to the efficient creation of customer value. In this approach, software functionalities are developed incrementally and validated in continuous experiments with stakeholders such as customers and users. The experiments provide factual feedback for guiding subsequent development. Although case studies on experimentation in industry exist, the understanding of the state of the practice and the encountered obstacles is incomplete. This paper presents an interview-based qualitative survey exploring the experimentation experiences of ten software development companies. The study found that although the principles of continuous experimentation resonated with industry practitioners, the state of the practice is not yet mature. In particular, experimentation is rarely systematic and continuous. Key challenges relate to changing organizational culture, accelerating development cycle speed, and measuring customer value and product success.}, language = {en} } @inproceedings{RissanenMuench2015, author = {Rissanen, Olli and M{\"u}nch, J{\"u}rgen}, title = {Continuous experimentation in the B2B Domain : a case study}, series = {Second International Workshop on Rapid Continuous Software Engineering RCoSE 2015 : Proceedings ; May 23, 2015, Florence, Italy}, booktitle = {Second International Workshop on Rapid Continuous Software Engineering RCoSE 2015 : Proceedings ; May 23, 2015, Florence, Italy}, publisher = {IEEE}, address = {Los Alamos, California}, isbn = {978-1-4673-7067-7}, doi = {10.1109/RCoSE.2015.10}, pages = {12 -- 18}, year = {2015}, abstract = {Rapid value delivery requires a company to utilize empirical evaluation of new features and products in order to avoid unnecessary product risks. This helps to make data-driven decisions and to ensure that the development is focused on features that provide real value for customers. Short feedback loops are a prerequisite as they allow for fast learning and reduced reaction times. Continuous experimentation is a development practice where the entire R\&D process is guided by constantly conducting experiments and collecting feedback. Although principles of continuous experimentation have been successfully applied in domains such as game software or SAAS, it is not obvious how to transfer continuous experimentation to the business to-business domain. In this article, a case study from a medium-sized software company in the B2B domain is presented. The study objective is to analyze the challenges, benefits and organizational aspects of continuous experimentation in the B2B domain. The results suggest that technical challenges are only one part of the challenges a company encounters in this transition. The company also has to address challenges related to the customer and organizational culture. Unique properties in each customers business play a major role and need to be considered when designing experiments. Additionally, the speed by which experiments can be conducted is relative to the speed by which production deployments can be made. Finally, the article shows how the study results can be used to modify the development in the case company in a way that more feedback and data is used instead of opinions.}, language = {en} } @article{MishraMuenchMishra2015, author = {Mishra, Alok and M{\"u}nch, J{\"u}rgen and Mishra, Deepti}, title = {Information Systems in Distributed Environments : ISDE 2014}, series = {ACM SIGSOFT software engineering notes}, volume = {40}, journal = {ACM SIGSOFT software engineering notes}, number = {5}, publisher = {ACM}, address = {New York, NY}, issn = {0163-5948}, doi = {10.1145/2815021.2815035}, pages = {36 -- 38}, year = {2015}, abstract = {This is a report from a one-day fourth international workshop on "Information Systems in Distributed Environments" (ISDE), which was organized in conjunction with the OnTheMove Federated Conferences \& Workshops (OTM 2014) October 29-30, 2014, Amantea, Calabria, Italy. The main focus of this event was to provide a venue for the discussion of challenges related to the development, operation, and maintenance of distributed information systems, and their creation in the context of global development projects. Further dissemination of research results will lead to an improvement of distributed information system development and deployment across the globe.}, language = {en} } @inproceedings{TheocharisKuhrmannMuenchetal.2015, author = {Theocharis, Georgios and Kuhrmann, Marco and M{\"u}nch, J{\"u}rgen and Diebold, Philipp}, title = {Is water-scrum-fall reality? On the use of agile and traditional development practices}, series = {Product-focused software process improvement : 16th International Conference, PROFES 2015, Bolzano, Italy, December 2-4, 2015}, booktitle = {Product-focused software process improvement : 16th International Conference, PROFES 2015, Bolzano, Italy, December 2-4, 2015}, editor = {Abrahamsson, Pekka}, publisher = {Springer}, address = {Cham}, isbn = {978-3-319-26844-6}, doi = {10.1007/978-3-319-26844-6_11}, pages = {149 -- 166}, year = {2015}, abstract = {For years, agile methods are considered the most promising route toward successful software development, and a considerable number of published studies the (successful) use of agile methods and reports on the benefits companies have from adopting agile methods. Yet, since the world is not black or white, the question for what happened to the traditional models arises. Are traditional models replaced by agile methods? How is the transformation toward Agile managed, and, moreover, where did it start? With this paper we close a gap in literature by studying the general process use over time to investigate how traditional and agile methods are used. Is there coexistence or do agile methods accelerate the traditional processes' extinction? The findings of our literature study comprise two major results: First, studies and reliable numbers on the general process model use are rare, i.e., we lack quantitative data on the actual process use and, thus, we often lack the ability to ground process-related research in practically relevant issues. Second, despite the assumed dominance of agile methods, our results clearly show that companies enact context-specific hybrid solutions in which traditional and agile development approaches are used in combination.}, language = {en} } @inproceedings{KuhrmannKonopkaNellemannetal.2015, author = {Kuhrmann, Marco and Konopka, Claudia and Nellemann, Peter and Diebold, Philipp and M{\"u}nch, J{\"u}rgen}, title = {Software process improvement : where is the evidence? ; initial findings from a systematic mapping study}, series = {2015 International Conference on Software and Systems Process (ICSSP) : proceedings ; August 24 - 26, 2015, Tallinn, Estonia}, booktitle = {2015 International Conference on Software and Systems Process (ICSSP) : proceedings ; August 24 - 26, 2015, Tallinn, Estonia}, editor = {Pfahl, Dietmar}, publisher = {ACM}, address = {New York, NY}, isbn = {978-1-4503-3346-7}, doi = {10.1145/2785592.2785600}, pages = {107 -- 116}, year = {2015}, abstract = {Software process improvement (SPI) is around for decades: frameworks are proposed, success factors are studied, and experiences have been reported. However, the sheer mass of concepts, approaches, and standards published over the years overwhelms practitioners as well as researchers. What is out there? Are there new emerging approaches? What are open issues? Still, we struggle to answer the question for what is the current state of SPI and related research? In this paper, we present initial results from a systematic mapping study to shed light on the field of SPI and to draw conclusions for future research directions. An analysis of 635 publications draws a big picture of SPI-related research of the past 25 years. Our study shows a high number of solution proposals, experience reports, and secondary studies, but only few theories. In particular, standard SPI models like CMMI and ISO/IEC 15504 are analyzed, enhanced, and evaluated for applicability, whereas these standards are critically discussed from the perspective of SPI in small-to- medium-sized companies, which leads to new specialized frameworks. Furthermore, we find a growing interest in success factors to aid companies in conducting SPI.}, language = {en} } @article{KararMerkFalketal.2016, author = {Karar, Mohamed Esmail and Merk, Denis and Falk, Volkmar and Burgert, Oliver}, title = {A simple and accurate method for computer-aided transapical aortic valve replacement}, series = {Computerized medical imaging and graphics}, volume = {50}, journal = {Computerized medical imaging and graphics}, number = {Special Issue on Computer Assisted Stenting}, publisher = {Elsevier}, address = {Amsterdam}, issn = {0895-6111}, doi = {10.1016/j.compmedimag.2014.09.005}, pages = {31 -- 41}, year = {2016}, abstract = {Background and purpose: Transapical aortic valve replacement (TAVR) is a recent minimally invasive surgical treatment technique for elderly and high-risk patients with severe aortic stenosis. In this paper,a simple and accurate image-based method is introduced to aid the intra-operative guidance of TAVR procedure under 2-D X-ray fluoroscopy. Methods: The proposed method fuses a 3-D aortic mesh model and anatomical valve landmarks with live 2-D fluoroscopic images. The 3-D aortic mesh model and landmarks are reconstructed from interventional X-ray C-arm CT system, and a target area for valve implantation is automatically estimated using these aortic mesh models.Based on template-based tracking approach, the overlay of visualized 3-D aortic mesh model, land-marks and target area of implantation is updated onto fluoroscopic images by approximating the aortic root motion from a pigtail catheter motion without contrast agent. Also, a rigid intensity-based registration algorithm is used to track continuously the aortic root motion in the presence of contrast agent.Furthermore, a sensorless tracking of the aortic valve prosthesis is provided to guide the physician to perform the appropriate placement of prosthesis into the estimated target area of implantation. Results: Retrospective experiments were carried out on fifteen patient datasets from the clinical routine of the TAVR. The maximum displacement errors were less than 2.0 mm for both the dynamic overlay of aortic mesh models and image-based tracking of the prosthesis, and within the clinically accepted ranges. Moreover, high success rates of the proposed method were obtained above 91.0\% for all tested patient datasets. Conclusion: The results showed that the proposed method for computer-aided TAVR is potentially a helpful tool for physicians by automatically defining the accurate placement position of the prosthesis during the surgical procedure.}, language = {en} } @inproceedings{TaibiLenarduzziAhmadetal.2015, author = {Taibi, Davide and Lenarduzzi, Valentina and Ahmad, Muhammad Ovais and Liukkunen, Kari and Lunesu, Ilaria and Matta, Martina and Fagerholm, Fabian and M{\"u}nch, J{\"u}rgen and Pietinen, Sami and Tukiainen, Markku and Fern{\´a}ndez-S{\´a}nchez, Carlos and Garbajosa, Juan and Syst{\"a}, Kari}, title = {"Free" innovation environments: lessons learned from the software factory initiatives}, series = {ICSEA 2015 : the Tenth International Conference on Software Engineering Advances, November 15-20, 2015, Barcelona, Spain}, booktitle = {ICSEA 2015 : the Tenth International Conference on Software Engineering Advances, November 15-20, 2015, Barcelona, Spain}, editor = {Oberhauser, Roy}, publisher = {IARIA}, organization = {International Academy Research and Industry Association}, isbn = {978-1-61208-438-1}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-7276}, pages = {25 -- 30}, year = {2015}, abstract = {Entrepreneurs and small and medium enterprises usually have issues on developing new prototypes, new ideas or testing new techniques. In order to help them, in the last years, academic Software Factories, a new concept of collaboration between universities and companies have been developed. Software Factories provide a unique environment for students and companies. Students benefit from the possibility of working in a real work environment learning how to apply the state of the art of the existing techniques and showing their skills to entrepreneurs. Companies benefit from the risk-free environment where they can develop new ideas, in a protected environment. Universities finally benefit from this setup as a perfect environment for empirical studies in industrial-like environment. In this paper, we present the network of academic Software Factories in Europe, showing how companies had already benefit from existing Software Factories and reporting success stories. The results of this paper can increase the network of the factories and help other universities and companies to setup similar environment to boost the local economy.}, language = {en} } @inproceedings{LacherWaliaFagerholmetal.2015, author = {Lacher, Lisa and Walia, Gursimran and Fagerholm, Fabian and Pagels, Max and Nygard, Kendall and M{\"u}nch, J{\"u}rgen}, title = {A behavior marker tool for measurement of the non-technical skills of software professionals : an empirical investigation}, series = {Proceedings SEKE 2015 : the 27th International Conference on Software Engineering \& Knowledge Engineering; July 6 - 8, 2015, Wyndham Pittsburgh University Center, Pittsburgh, USA}, booktitle = {Proceedings SEKE 2015 : the 27th International Conference on Software Engineering \& Knowledge Engineering; July 6 - 8, 2015, Wyndham Pittsburgh University Center, Pittsburgh, USA}, doi = {10.18293/SEKE2015-227}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-7317}, pages = {409 -- 414}, year = {2015}, abstract = {Managers recognize that software development project teams need to be developed and guided. Although technical skills are necessary, non-technical (NT) skills are equally, if not more, necessary for project success. Currently, there are no proven tools to measure the NT skills of software developers or software development teams. Behavioral markers (observable behaviors that have positive or negative impacts on individual or team performance) are beginning to be successfully used by airline and medical industries to measure NT skill performance. The purpose of this research is to develop and validate the behavior marker system tool that can be used by different managers or coaches to measure the NT skills of software development individuals and teams. This paper presents an empirical study conducted at the Software Factory where users of the behavior marker tool rated video clips of software development teams. The initial results show that the behavior marker tool can be reliably used with minimal training.}, language = {en} } @article{GonenFangElSheikhetal.2014, author = {Gonen, Bilal and Fang, Xingang and El-Sheikh, Eman and Bagui, Sikha and Wilde, Norman and Zimmermann, Alfred}, title = {Ontological support for the evolution of future services oriented architectures}, series = {Transactions on machine learning and artificial intelligence}, volume = {2}, journal = {Transactions on machine learning and artificial intelligence}, number = {6}, publisher = {Society for Science and Education}, doi = {10.14738/tmlai.26.784}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-7359}, pages = {77 -- 90}, year = {2014}, abstract = {Services Oriented Architectures (SOA) have emerged as a useful framework for developing interoperable, large-scale systems, typically implemented using the Web Services (WS) standards. However, the maintenance and evolution of SOA systems present many challenges. SmartLife applications are intelligent user-centered systems and a special class of SOA systems that present even greater challenges for a software maintainer. Ontologies and ontological modeling can be used to support the evolution of SOA systems. This paper describes the development of a SOA evolution ontology and its use to develop an ontological model of a SOA system. The ontology is based on a standard SOA ontology. The ontological model can be used to provide semantic and visual support for software maintainers during routine maintenance tasks. We discuss a case study to illustrate this approach, as well as the strengths and limitations.}, language = {en} } @article{NethSoumanEngeletal.2012, author = {Neth, Christian and Souman, Jan and Engel, David and Kloos, Uwe and B{\"u}lthoff, Heinrich and Mohler, Betty}, title = {Velocity-dependent dynamic curvature gain for redirected walking}, series = {IEEE transactions on visualization and computer graphics}, volume = {18}, journal = {IEEE transactions on visualization and computer graphics}, number = {7}, publisher = {IEEE}, address = {New York, NY}, issn = {1077-2626}, doi = {10.1109/TVCG.2011.275}, pages = {1041 -- 1052}, year = {2012}, abstract = {Redirected walking techniques allow people to walk in a larger virtual space than the physical extents of the laboratory. We describe two experiments conducted to investigate human sensitivity to walking on a curved path and to validate a new redirected walking technique. In a psychophysical experiment, we found that sensitivity to walking on a curved path was significantly lower for slower walking speeds (radius of 10 meters versus 22 meters). In an applied study, we investigated the influence of a velocity-dependent dynamic gain controller and an avatar controller on the average distance that participants were able to freely walk before needing to be reoriented. The mean walked distance was significantly greater in the dynamic gain controller condition, as compared to the static controller (22 meters versus 15 meters). Our results demonstrate that perceptually motivated dynamic redirected walking techniques, in combination with reorientation techniques, allow for unaided exploration of a large virtual city model.}, language = {en} } @article{delaRosaChoudheryCurioetal.2014, author = {de la Rosa, Stephan and Choudhery, Rabia and Curio, Crist{\´o}bal and Ullman, Shimon and Assif, Liav and B{\"u}lthoff, Heinrich}, title = {Visual categorization of social interactions}, series = {Visual cognition}, volume = {22}, journal = {Visual cognition}, number = {9/10}, publisher = {Routledge, Taylor \& Francis Group}, address = {London}, issn = {1350-6285}, doi = {10.1080/13506285.2014.991368}, pages = {1233 -- 1271}, year = {2014}, abstract = {Prominent theories of action recognition suggest that during the recognition of actions the physical patterns of the action is associated with only one action interpretation (e.g., a person waving his arm is recognized as waving). In contrast to this view, studies examining the visual categorization of objects show that objects are recognized in multiple ways (e.g., a VW Beetle can be recognized as a car or a beetle) and that categorization performance is based on the visual and motor movement similarity between objects. Here, we studied whether we find evidence for multiple levels of categorization for social interactions (physical interactions with another person, e.g., handshakes). To do so, we compared visual categorization of objects and social interactions (Experiments 1 and 2) in a grouping task and assessed the usefulness of motor and visual cues (Experiments 3, 4, and 5) for object and social interaction categorization. Additionally, we measured recognition performance associated with recognizing objects and social interactions at different categorization levels (Experiment 6). We found that basic level object categories were associated with a clear recognition advantage compared to subordinate recognition but basic level social interaction categories provided only a little recognition advantage. Moreover, basic level object categories were more strongly associated with similar visual and motor cues than basic level social interaction categories. The results suggest that cognitive categories underlying the recognition of objects and social interactions are associated with different performances. These results are in line with the idea that the same action can be associated with several action interpretations (e.g., a person waving his arm can be recognized as waving or greeting).}, language = {en} } @incollection{HertweckKinitzki2015, author = {Hertweck, Dieter and Kinitzki, Martin}, title = {Datenorientierung statt Bauchentscheidung : F{\"u}hrungs- und Organisationskultur in der datenorientierten Unternehmung}, series = {Praxishandbuch Big Data : Wirtschaft - Recht - Technik}, booktitle = {Praxishandbuch Big Data : Wirtschaft - Recht - Technik}, editor = {Dorschel, Joachim}, publisher = {Springer Gabler}, address = {Wiesbaden}, isbn = {978-365-80728-9-6}, doi = {10.1007/978-3-658-07289-6_2}, pages = {15 -- 32}, year = {2015}, abstract = {Big Data wird aktuell als einer der Haupttrends der IT-Industrie diskutiert. Big Data d. h. auf Basis großer Mengen unterschiedlich strukturierter Daten die Entscheidungen in Echtzeit oder prognostisch zu treffen. Von hochleistungsf{\"a}higen, schnell verf{\"u}gbaren Prognoseverfahren erhofft man sich eine Risikominimierung f{\"u}r unternehmerische Entscheidungen in hochvolatilen M{\"a}rkten.}, language = {de} } @book{HertweckHoffmannIvanovetal.2015, author = {Hertweck, Dieter and Hoffmann, Claus and Ivanov, Svetlozar and Kinitzki, Martin and K{\"u}ller, Philipp and Longer, Urška and Oražem, Benjamin and Ciucan-Rusu, Liviu and Stefanov, Krassen and Utz, Wilfrid}, title = {Transforming SMEs in the Danube Region : results of the project ITSM4SME}, editor = {K{\"u}ller, Philipp}, publisher = {Hochschule Heilbronn}, address = {Heilbronn}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-6675}, pages = {38}, year = {2015}, abstract = {Small and medium-sized enterprises (SMEs) play a fundamental role in the economic system of the European Union: SMEs represent over 99 percent of all companies and provide two-thirds of the jobs in the private sector. Their innovativeness and economic success have significant influence on growth, jobs and prosperity in Europe. Information technologies are regarded as key drivers of innovation in small and medium-sized enterprises (SME). Modern information technologies (IT) offer SMEs today many opportunities to improve their competitiveness and market position. Thus, business processes can be designed efficiently, open up new market segments and strengthen the innovation capacity significantly. However, many SMEs still have difficulties in utilizing these new technologies efficiently in order to foster process and product innovation. This is partly due to the fact that many SMEs don't use IT Service Management and waste resources in running basic IT-functions like the maintenance of printers, software or servers. Information Technology Service Management (ITSM) is a discipline for managing IT systems centred on the customer's perspective of IT's contribution to the business. Thus, by strengthening the performance of SME's IT departments, ITSM enables process innovation (e.g. eProcurement) and product innovations (e.g. client services) can be promoted. The EU-funded project "IT Service Management for small and medium-sized Enterprises of the Danube Region" (ITSM4SME) aims to make SMEs in the Danube Region aware of the potential of ITSM, to inspire SMEs about the use of information technology and to allow IT-enabled innovations. The aims of the project have been achieved inter alia through a simplified method for IT service management for small IT organisations, practical case studies, a "do-it-yourself" service management modelling tool, an eLearning portal and by training more than 300 participants from SMEs in pilot training courses in Bulgaria, Romania and Slovenia.}, language = {en} } @inproceedings{WiemuthFinkBurgert2015, author = {Wiemuth, Markus and Fink, Elena and Burgert, Oliver}, title = {A workflow management system for the perioperative area supporting all actors}, series = {IEEE 17th International Conference on e-Health Networking, Applications and Services (Healthcom), 2015 : 14 - 17 Oct. 2015, Boston, USA}, booktitle = {IEEE 17th International Conference on e-Health Networking, Applications and Services (Healthcom), 2015 : 14 - 17 Oct. 2015, Boston, USA}, publisher = {IEEE}, address = {Piscataway, NJ}, isbn = {978-1-4673-8325-7}, doi = {10.1109/HealthCom.2015.7454468}, pages = {28 -- 31}, year = {2015}, abstract = {Information systems, which support the workflow in the clinical area, are currently limited to organizational processes. This work shows a first approach of an information system supporting all actors in the perioperative area. The first prototype and proof of concept was a task manager, giving all actors information about their task and the task of all other actors during an intervention. Based on this initial task manager, we implemented an information system based on a workflow engine controlling all processes and all information necessary for the intervention. A second part was the development of a perioperative process visualization which was developed based on a user centered approach jointly with clinicians and OR members.}, language = {en} } @inproceedings{WellerdiekBreidtGeussetal.2015, author = {Wellerdiek, Anna and Breidt, Martin and Geuss, Michael and Streuber, Stephan and Kloos, Uwe and Black, Michael and Mohler, Betty}, title = {Perception of strength and power of realistic male characters}, series = {Proceedings of the ACM SIGGRAPH Symposium on Applied Perception SAP 15, September 13 - 14, T{\"u}bingen, Germany}, booktitle = {Proceedings of the ACM SIGGRAPH Symposium on Applied Perception SAP 15, September 13 - 14, T{\"u}bingen, Germany}, publisher = {ACM}, address = {New York, NY}, isbn = {978-1-4503-3812-7}, doi = {10.1145/2804408.2804413}, pages = {7 -- 14}, year = {2015}, abstract = {We investigated the influence of body shape and pose on the perception of physical strength and social power for male virtual characters. In the first experiment, participants judged the physical strength of varying body shapes, derived from a statistical 3D body model. Based on these ratings, we determined three body shapes (weak, average, and strong) and animated them with a set of power poses for the second experiment. Participants rated how strong or powerful they perceived virtual characters of varying body shapes that were displayed in different poses. Our results show that perception of physical strength was mainly driven by the shape of the body. However, the social attribute of power was influenced by an interaction between pose and shape. Specifically, the effect of pose on power ratings was greater for weak body shapes. These results demonstrate that a character with a weak shape can be perceived as more powerful when in a high-power pose.}, language = {en} } @inproceedings{KleinVelicuMartinezMadridetal.2015, author = {Klein, Agnes and Velicu, Oana Ramona and Mart{\´i}nez Madrid, Natividad and Seepold, Ralf}, title = {Sleep stages classification using vital signals recordings}, series = {Proceedings of 2015 12th International Workshop on Intelligent Solutions in Embedded Systems (WISES) : Universit{\`a} Politecnica delle Marche, Ancona, Italy, 29.-30. Oct. 2015}, booktitle = {Proceedings of 2015 12th International Workshop on Intelligent Solutions in Embedded Systems (WISES) : Universit{\`a} Politecnica delle Marche, Ancona, Italy, 29.-30. Oct. 2015}, editor = {Conti, Massimo}, publisher = {IEEE}, address = {Piscataway, NJ}, isbn = {978-88-87548-08-2}, pages = {47 -- 50}, year = {2015}, abstract = {To evaluate the quality of a person´s sleep it is essential to identify the sleep stages and their durations. Currently, the gold standard in terms of sleep analysis is overnight polysomnography (PSG), during which several techniques like EEG (eletroencephalogram), EOG (electrooculogram), EMG (electromyogram), ECG (electrocardiogram), SpO2 (blood oxygen saturation) and for example respiratory airflow and respiratory effort are recorded. These expensive and complex procedures, applied in sleep laboratories, are invasive and unfamiliar for the subjects and it is a reason why it might have an impact on the recorded data. These are the main reasons why low-cost home diagnostic systems are likely to be advantageous. Their aim is to reach a larger population by reducing the number of parameters recorded. Nowadays, many wearable devices promise to measure sleep quality using only the ECG and body-movement signals. This work presents an android application developed in order to proof the accuracy of an algorithm published in the sleep literature. The algorithm uses ECG and body movement recordings to estimate sleep stages. The pre-recorded signals fed into the algorithm have been taken from physionet1 online database. The obtained results have been compared with those of the standard method used in PSG. The mean agreement ratios between the sleep stages REM, Wake, NREM-1, NREM-2 and NREM-3 were 38.1\%, 14\%, 16\%, 75\% and 54.3\%.}, language = {en} } @inproceedings{BorchersMartinMieskesetal.2015, author = {Borchers, Svenja and Martin, Denis and Mieskes, Sarah and Rieger, Stefan and Curio, Crist{\´o}bal and F{\"a}ßler, Victor}, title = {Towards audio-based distraction estimation in the car}, series = {Cognitive 2015, The Seventh International Conference on Advanced Cognitive Technologies and Applications ; Holides 2015, The First Workshop on Holistic Human Factors for Adaptive Cooperative Human-Machine Systems ; March 22 - 27, 2015, Nice, France}, booktitle = {Cognitive 2015, The Seventh International Conference on Advanced Cognitive Technologies and Applications ; Holides 2015, The First Workshop on Holistic Human Factors for Adaptive Cooperative Human-Machine Systems ; March 22 - 27, 2015, Nice, France}, editor = {Makris, Nikos}, organization = {International Academy, Research, and Industry Association (IARIA)}, isbn = {978-1-61208-390-2}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-7926}, pages = {187 -- 190}, year = {2015}, abstract = {Distraction of the driver is one of the most frequent causes for car accidents. We aim for a computational cognitive model predicting the driver's degree of distraction during driving while performing a secondary task, such as talking with co-passengers. The secondary task might cognitively involve the driver to differing degrees depending on the topic of the conversation or the number of co-passengers. In order to detect these subtle differences in everyday driving situations, we aim to analyse in-car audio signals and combine this information with head pose and face tracking information. In the first step, we will assess driving, video and audio parameters reliably predicting cognitive distraction of the driver. These parameters will be used to train the cognitive model in estimating the degree of the driver's distraction. In the second step, we will train and test the cognitive model during conversations of the driver with co-passengers during active driving. This paper describes the work in progress of our first experiment with preliminary results concerning driving parameters corresponding to the driver's degree of distraction. In addition, the technical implementation of our experiment combining driving, video and audio data and first methodological results concerning the auditory analysis will be presented. The overall aim for the application of the cognitive distraction model is the development of a mobile user profile computing the individual distraction degree and being applicable also to other systems.}, language = {en} } @article{LessnerLauxConnolly2016, author = {Lessner, Tim and Laux, Friedrich and Connolly, Thomas}, title = {O|R|P|E - a data semantics driven concurrency control mechanism with run-time adaptation}, series = {International journal on advances in software}, volume = {9}, journal = {International journal on advances in software}, number = {1/2}, publisher = {IARIA}, issn = {1942-2628}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-8397}, pages = {62 -- 79}, year = {2016}, abstract = {This paper presents a concurrency control mechanism that does not follow a "one concurrency control mechanism fits all needs" strategy. With the presented mechanism a transaction runs under several concurrency control mechanisms and the appropriate one is chosen based on the accessed data. For this purpose, the data is divided into four classes based on its access type and usage (semantics). Class O (the optimistic class) implements a first-committer-wins strategy, class R (the reconciliation class) implements a first-n-committers-win strategy, class P (the pessimistic class) implements a first-reader-wins strategy, and class E (the escrow class) implements a first-n-readers-win strategy. Accordingly, the model is called OjRjPjE. The selected concurrency control mechanism may be automatically adapted at run-time according to the current load or a known usage profile. This run-time adaptation allows OjRjPjE to balance the commit rate and the response time even under changing conditions. OjRjPjE outperforms the Snapshot Isolation concurrency control in terms of response time by a factor of approximately 4.5 under heavy transactional load (4000 concurrent transactions). As consequence, the degree of concurrency is 3.2 times higher.}, language = {en} }