@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{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} } @article{LunescuMuenchMarchesietal.2018, author = {Lunescu, Ilaria and M{\"u}nch, J{\"u}rgen and Marchesi, Michele and Kuhrmann, Marco}, title = {Using simulation for understanding and reproducing distributed software development processes in the cloud}, series = {Information and software technology}, volume = {103}, journal = {Information and software technology}, publisher = {Elsevier Science}, address = {Amsterdam}, issn = {0950-5849}, doi = {10.1016/j.infsof.2018.07.004}, pages = {226 -- 238}, year = {2018}, abstract = {Context: Organizations increasingly develop software in a distributed manner. The cloud provides an environment to create and maintain software-based products and services. Currently, it is unknown which software processes are suited for cloud-based development and what their effects in specific contexts are. Objective: We aim at better understanding the software process applied to distributed software development using the cloud as development environment. We further aim at providing an instrument which helps project managers comparing different solution approaches and to adapt team processes to improve future project activities and outcomes. Method: We provide a simulation model which helps analyzing different project parameters and their impact on projects performed in the cloud. To evaluate the simulation model, we conduct different analyses using a Scrumban process and data from a project executed in Finland and Spain. An extra adaptation of the simulation model for Scrum and Kanban was used to evaluate the suitability of the simulation model to cover further process models. Results: A comparison of the real project data with the results obtaind from the different simulation runs shows the simulation producing results close to the real data, and we could successfully replicate a distributed software project. Furthermore, we could show that the simulation model is suitable to address further process models. Conclusion: The simulator helps reproducing activities, developers, and events in the project, and it helps analyzing potential tradeoffs, e.g., regarding throughput, total time, project size, team size and work-in-progress limits. Furthermore, the simulation model supports project managers selecting the most suitable planning alternative thus supporting decision-making processes.}, language = {en} } @inproceedings{Leber2017, author = {Leber, Isabel}, title = {WearIT : eine Rapid Prototyping Plattform f{\"u}r Wearables}, series = {Wissenschaftliche Vertiefungskonferenz HuC - Design the Future : Informatik-Konferenz an der Hochschule Reutlingen, 22. November 2017}, booktitle = {Wissenschaftliche Vertiefungskonferenz HuC - Design the Future : Informatik-Konferenz an der Hochschule Reutlingen, 22. November 2017}, editor = {Kloos, Uwe}, publisher = {Hochschule Reutlingen}, address = {Reutlingen}, isbn = {978-3-00-057955-4}, pages = {39 -- 48}, year = {2017}, abstract = {Rapid Prototyping Plattformen reduzieren die Entwicklungszeit, indem das {\"U}berpr{\"u}fen einer Idee in Form eines Prototyps schnell umzusetzen ist und mehr Zeit f{\"u}r die eigentliche Anwendungsentwicklung mit Benutzerschnittstellen zur Verf{\"u}gung steht. Dieser Ansatz wird schon lange bei technischen Plattformen, wie bspw. dem Arduino, verfolgt. Um diese Form von Prototyping auf Wearables zu {\"u}bertragen, wird in diesem Paper WearIT vorgestellt. WearIT besteht als Wearable Prototyping Plattform aus vier Komponenten: Einer Weste, Sensor- und Aktorshieldss, einer eigenen bibliothek sowie einem Mainboard bestehend aus Arduino, Raspberry Pi, einer Steckplatine und einem GPS-Modul. Als Ergebnis kann ein Wearable Prototyp schnell, durch das Anbringen von Sensor- und Aktorshields an der WearIT Weste, entwickelt werden. Diese Sensor- und Aktorshields k{\"o}nnen anschließend durch die WearIT-Bibliothek programmiert werden. Daf{\"u}r kann {\"u}ber Virtual Network Computing (VNC) mit einem entfernten Rechner auf die Bildschirminhalte des Rasperry Pis zugegriffen und der Arduino programmiert werden.}, language = {de} } @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{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{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} } @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{KehrerJugelZimmermann2016, author = {Kehrer, Stefan and Jugel, Dierk and Zimmermann, Alfred}, title = {Categorizing requirements for enterprise architecture management in big data literature}, series = {2016 IEEE 20th International Enterprise Distributed Object Computing Workshop (EDOCW), EDOCW 2016, 5. - 9. September 2016, Vienna, Austria}, booktitle = {2016 IEEE 20th International Enterprise Distributed Object Computing Workshop (EDOCW), EDOCW 2016, 5. - 9. September 2016, Vienna, Austria}, editor = {Dijkman, Remco}, publisher = {IEEE}, address = {Piscataway, NJ}, isbn = {978-1-4673-9933-3}, doi = {10.1109/EDOCW.2016.7584352}, pages = {98 -- 105}, year = {2016}, abstract = {Organizations identified the opportunities of big data analytics to support the business with problem-specific insights through the exploitation of generated data. Sociotechnical solutions are developed in big data projects to reach competitive advantage. Although these projects are aligned to specific business needs, common architectural challenges are not addressed in a comprehensive manner. Enterprise architecture management is a holistic approach to tackle complex business and IT architectures. The transformation of an organization's EA is influenced by big data transformation processes and their data-driven approach on all layers. In this paper, we review big data literature to analyze which requirements for the EA management discipline are proposed. Based on a systematic literature identification, conceptual categories of requirements for EA management are elicited utilizing an inductive category formation. These conceptual categories of requirements constitute a category system that facilitates a new perspective on EA management and fosters the innovation-driven evolution of the EA management. discipline.}, 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{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{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} } @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} } @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} } @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{HohlMuenchSchneideretal.2016, author = {Hohl, Philipp and M{\"u}nch, J{\"u}rgen and Schneider, Kurt and Stupperich, Michael}, title = {Forces that prevent agile adoption in the automotive domain}, series = {Product-focused software process improvement : 17th International Conference, PROFES 2016, Trondheim, Norway, November 22-24, 2016, proceedings}, booktitle = {Product-focused software process improvement : 17th International Conference, PROFES 2016, Trondheim, Norway, November 22-24, 2016, proceedings}, editor = {Abrahamsson, Pekka}, publisher = {Springer}, address = {Cham}, isbn = {978-3-319-49094-6}, doi = {10.1007/978-3-319-49094-6_32}, pages = {468 -- 476}, year = {2016}, abstract = {Context: The current transformation of automotive development towards innovation, permanent learning and adapting to changes are directing various foci on the integration of agile methods. Although, there have been efforts to apply agile methods in the automotive domain for many years, a wide-spread adoption has not yet taken place. Goal: This study aims to gain a better understanding of the forces that prevent the adoption of agile methods. Method: Survey based on 16 semi-structured interviews from the automotive domain. The results are analyzed by means of thematic coding. Results: Forces that prevent agile adoption are mainly of organizational, technical and social nature and address inertia, anxiety and context factors. Key challenges in agile adoption are related to transforming organizational structures and culture, achieving faster software release cycles without loss of quality, the importance of software reuse in combination with agile practices, appropriate quality assurance measures, and the collaboration with suppliers and other disciplines such as mechanics. Conclusion: Significant challenges are imposed by specific characteristics of the automotive domain such as high quality requirements and many interfaces to surrounding rigid and inflexible processes. Several means are identified that promise to overcome these challenges.}, language = {en} } @inproceedings{RossmannWilke2017, author = {Rossmann, Alexander and Wilke, Tim}, title = {Building brand love : a dynamic capabilities approach}, series = {Digital Enterprise Computing (DEC 2017) : July 11 - 12, 2017, B{\"o}blingen, Germany. - (Lecture notes in informatics (LNI) - proceedings ; volume P-272)}, booktitle = {Digital Enterprise Computing (DEC 2017) : July 11 - 12, 2017, B{\"o}blingen, Germany. - (Lecture notes in informatics (LNI) - proceedings ; volume P-272)}, editor = {Rossmann, Alexander}, publisher = {Gesellschaft f{\"u}r Informatik}, address = {Bonn}, isbn = {978-3-88579-666-4}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-14255}, pages = {135 -- 146}, year = {2017}, abstract = {This paper investigates the impact of dynamic capabilities (DC) on brand love. From a resource-based view, there is little clarity vis-{\`a}-vis the specific capabilities that drive the ability to create brand love. This paper focuses on three research questions: Firstly, which dynamic capabilities are relevant for brand love? Secondly, how strong is the impact of certain dynamic capabilities on brand love? Thirdly, which conditions mediate and moderate the impact of specific dynamic capabilities on brand love? Data from a multi-method research approach have been used to itentify the specific capabilities that corporations need, to enhance brand love. Furthermore, a standardized online survey was conducted on marketing executives and evaluated by structural equation modeling. The results indicate, that customer expertise plays a major role in the relationship between dynamic capabilities and brand love. Furthermore, this relationship is more important in markets that have a low competitive differentiation in products and services.}, language = {en} } @inproceedings{Rossmann2011, author = {Rossmann, Alexander}, title = {Trust in interfirm relationships : expanding insights into relational capabilities and customer preferences}, series = {Enhancing knowledge development in marketing : Summer Educators' Conference, August 13 - 16, 2010, Boston, Massachusetts}, booktitle = {Enhancing knowledge development in marketing : Summer Educators' Conference, August 13 - 16, 2010, Boston, Massachusetts}, editor = {Easwar, Iyer}, publisher = {Curran Associates}, address = {Red Hook, NY}, isbn = {978-1-61782-253-7}, pages = {209 -- 220}, year = {2011}, abstract = {Suppliers need to improve their relational capabilities if they are to enhance customer trust. Debate about such capabilities is dominated by an interpersonal approach. This paper provieds novel marketing options by expanding insights into alternative types of relational capabilities. Furthermore, the moderating role of customer preferences on the effectiveness of relational capabilities is evaluated.}, 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} } @incollection{RothMerz2015, author = {Roth, Armin and Merz, Sandra Lucia}, title = {Ganzheitliches Leistungsmanagement als Erfolgsfaktor im globalen Wettbewerb}, series = {Moderne Controllingkonzepte : zuk{\"u}nftige Anforderungen erkennen und integrieren}, booktitle = {Moderne Controllingkonzepte : zuk{\"u}nftige Anforderungen erkennen und integrieren}, editor = {Gleich, Ronald}, publisher = {Haufe}, address = {Freiburg}, isbn = {978-3-648-07216-5}, pages = {77 -- 92}, year = {2015}, abstract = {Unternehmen ben{\"o}tigen heutzutage im globalen Wettbewerb ein effektives und effizientes Leistungsmanagement, um ihren Erfolg langfristig absichern zu k{\"o}nnen. Ein solches ganzheitliches und langfristiges Performance Managment kann nur dann die Erwartungen erf{\"u}llen, wenn alle erfolgskritischen Management-Disziplinen im Rahmen eines integrativen Managementsystems optimal aufeinander abgestimmt sind. Der Beitrag zeigt, welche grundlegenden Managementmethoden und -instrumente sich identifizieren lassen, um den Unterschied zwischen dauerhaft erfolgreichen und nicht erfolgreichen Unternehmen zu erkl{\"a}ren. In diesem Kontext wird ein Ansatz f{\"u}r einen Leistungsmanagement-Gesamtprozess entwickelt, in dem die zentralen Problemquellen bei der Einf{\"u}hrung von Performance Management eingeordnet und erl{\"a}utert werden.}, language = {de} } @inproceedings{OPUS4-1241, title = {DBKDA 2016 : the Eighth International Conference on Advances in Databases, Knowledge, and Data Applications : GraphSM 2016: the Third International Workshop on Large-Scale Graph Storage and Management : June 26 - 30, Lisbon, Portugal}, editor = {Laux, Friedrich and Schmidt, Andreas and Hristovski, Dimitar}, organization = {International Academy, Research, and Industry Association (IARIA)}, isbn = {978-1-61208-486-2}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-12413}, pages = {96}, year = {2016}, abstract = {The Eighth International Conference on Advances in Databases, Knowledge, and Data Applications (DBKDA 2016), held between June 26 - 30, 2016 - Lisbon, Portugal, 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.}, language = {en} } @inproceedings{HohlStupperichMuenchetal.2016, author = {Hohl, Philipp and Stupperich, Michael and M{\"u}nch, J{\"u}rgen and Schneider, Kurt}, title = {Die Variantenvielfalt agil managen : agile Software-Produktlinien im Automobilsegment}, series = {Tagungsband - Embedded Software Engineering Kongress 2016 : 28. November bis 2. Dezember 2016, Sindelfingen}, booktitle = {Tagungsband - Embedded Software Engineering Kongress 2016 : 28. November bis 2. Dezember 2016, Sindelfingen}, publisher = {Elektronikpraxis, Vogel Business Media GmbH \& Co. KG}, address = {W{\"u}rzburg}, isbn = {978-3-8343-2504-4}, pages = {427 -- 433}, year = {2016}, abstract = {Die Kombination von Softwareproduktlinien und agiler Softwareentwicklung in der Automobilbranche ist vielversprechend. Das Ziel ist hierbei, sowohl die Vorteile agiler Methoden wie kurze Entwicklungszyklen als auch die Vorteile systematischer Wiederverwendung wie beispielsweise das effektive Management von Varianten zu erzielen. Allerdings ist die Kombination auch mit Herausforderungen verbunden und erfordert eine geeignete Einf{\"u}hrungs- oder Transformationsstrategie. Basierend auf Erkenntnissen einer Interviewstudie und existierenden Produktlinienentwicklungen werden Herausforderungen und L{\"o}sungsideen aufgezeigt.}, language = {de} } @article{MoessnerSissouno2016, author = {M{\"o}ßner, Bernhard and Sissouno, Nada}, title = {A note on tensor product spline approximation via extension operators}, series = {Ja{\´e}n journal on approximation : revista matem{\´a}tica internacional}, volume = {8}, journal = {Ja{\´e}n journal on approximation : revista matem{\´a}tica internacional}, number = {1}, publisher = {Univ. de Ja{\´e}n}, address = {Ja{\´e}n}, issn = {1889-3066}, pages = {27 -- 32}, year = {2016}, abstract = {In this note we look at anisotropic approximation of smooth functions on bounded domains with tensor product splines. The main idea is to extend such functions and then use known approximation techniques on Rd. We prove an error estimate for domains for which bounded extension operators exist. This obvious approach has some limitations. It is not applicable without restrictions on the chosen coordinate degree even if the domain is as simple as the unit disk. Further for approximation on Rd there are error estimates in which the grid widths and directional derivatives are paired in an interesting way. It seems impossible to maintain this property using extension operators.}, 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{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{LantowJugelWissotzkietal.2016, author = {Lantow, Birger and Jugel, Dierk and Wißotzki, Matthias and Lehmann, Benjamin and Zimmermann, Ole and Sandkuhl, Kurt}, title = {Towards a classification framework for approaches to enterprise architecture analysis}, series = {The practice of enterprise modeling : 9th IFIP WG 8.1. Working Conference, PoEM 2016, Sk{\"o}vde, Sweden, November 8 - 10, 2016, proceedings}, booktitle = {The practice of enterprise modeling : 9th IFIP WG 8.1. Working Conference, PoEM 2016, Sk{\"o}vde, Sweden, November 8 - 10, 2016, proceedings}, editor = {Horkoff, Jennifer}, publisher = {Springer}, address = {Cham}, isbn = {978-3-319-48393-1}, doi = {10.1007/978-3-319-48393-1_25}, pages = {335 -- 343}, year = {2016}, abstract = {Analysis is an important part of the enterprise architecture management process. Prior to decisions regarding transformation of the enterprise architecture, the current situation and the outcomes of alternative action plans have to be analysed. Many analysis approaches have been proposed by researchers and current enterprise architecture management tools implement analysis functionalities. However, few work has been done structuring and classifying enterprise architecture analysis approaches. This paper collects and extends existing classification schemes, presenting a framework for enterprise architecture analysis classification. For evaluation, a collection of enterprise architecture analysis approaches has been classified based on this framework. As a result, the description of these approaches has been assessed, a common set of important categories for enterprise architecture analysis classification has been derived and suggestions for further development are drawn.}, language = {en} } @inproceedings{BischoffKinitzkiWilkeetal.2017, author = {Bischoff, Daniel and Kinitzki, Martin and Wilke, Tim and Zekiraj, Flamur and Zivkovic, Sanja and Koppenh{\"o}fer, Christine and Fauser, Jan and Hertweck, Dieter}, title = {Smart meter based business models for the electricity sector : a systematical literature research}, series = {Digital Enterprise Computing (DEC 2017) : July 11 - 12, 2017, B{\"o}blingen, Germany. - (Lecture notes in informatics (LNI) - proceedings ; volume P-272)}, booktitle = {Digital Enterprise Computing (DEC 2017) : July 11 - 12, 2017, B{\"o}blingen, Germany. - (Lecture notes in informatics (LNI) - proceedings ; volume P-272)}, editor = {Rossmann, Alexander}, publisher = {Gesellschaft f{\"u}r Informatik}, address = {Bonn}, isbn = {978-3-88579-666-4}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-14212}, pages = {79 -- 90}, year = {2017}, abstract = {The Act on the Digitization of the Energy Transition forces German industries and households to introduce smart meters in order to save engery, to gain individual based electricity tariffs and to digitize the energy data flow. Smart meter can be regarded as the advancement of the traditional meter. Utilizing this new technology enables a wide range of innovative business models that provide additional value for the electricity suppliers as well as for their customers. In this study, we followed a two-step approach. At first, we provide a state-of-the-art comparison of these business models found in the literature and identify structural differences in the way they add value to the offered products and services. Secondly, the business models are grouped into categories with respect to customer segmetns and the added value to the smart grid. Findings indicate that most business models focus on the end-costumer as their main customer.}, language = {en} } @inproceedings{Rossmann2018, author = {Rossmann, Alexander}, title = {Digital Maturity : Conceptualization and Measurement Model}, series = {Proceedings of the International Conference on Information Systems : Bridging the Internet of People, Data, and Things (39th ICIS 2018)}, booktitle = {Proceedings of the International Conference on Information Systems : Bridging the Internet of People, Data, and Things (39th ICIS 2018)}, publisher = {Association for Information Systems (AIS)}, address = {New York}, isbn = {978-0-9966831-7-3}, year = {2018}, abstract = {The rise of digital technologies has become an important driver for change in multiple industries. Therefore, firms need to develop digital capabilities to manage the transformation process successfully.}, language = {en} } @article{FeldtZimmermannBergersenetal.2018, author = {Feldt, Robert and Zimmermann, Thomas and Bergersen, Gunnar and Falessi, Davide and Jedlitschka, Andreas and Juristo, Natalia and M{\"u}nch, J{\"u}rgen and Oivo, Markku and Runeson, Per and Shepperd, Martin}, title = {Four commentaries on the use of students and professionals in empirical software engineering experiments}, series = {Empirical software engineering : an international journal}, volume = {23}, journal = {Empirical software engineering : an international journal}, number = {6}, publisher = {Springer Science + Business Media B.V}, address = {Dordrecht}, issn = {1382-3256}, doi = {10.1007/s10664-018-9655-0}, pages = {3801 -- 3820}, year = {2018}, abstract = {The relative pros and cons of using students or practitioners in experiments in empirical software engineering have been discussed for a long time and continue to be an important topic. Following the recent publication of "Empirical software engineering experts on the use of students and professionals in experiments" by Falessi, Juristo, Wohlin, Turhan, M{\"u}nch, Jedlitschka, and Oivo (EMSE, February 2018) we received a commentary by Sj{\o}berg and Bergersen. Given that the topic is of great methodological interest to the community and requires nuanced treatment, we invited two editorial board members, Martin Shepperd and Per Runeson, respectively, to provide additional views.}, 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{MerdianBurgert2017, author = {Merdian, Irene and Burgert, Oliver}, title = {Scheduled flexibility and individualization of knowledge transfer in foundations of computer science}, series = {Conference proceedings New perspectives in science education : 6th conference edition, Florence, Italy, 16-17 march 2017}, booktitle = {Conference proceedings New perspectives in science education : 6th conference edition, Florence, Italy, 16-17 march 2017}, publisher = {libreriauniversitaria.it.edizioni}, address = {Padova}, isbn = {978-88-6292-847-2}, pages = {47 -- 51}, year = {2017}, abstract = {The opening of the German higher education system for new target groups involves a heterogeneous composition of students as never before and face up the universities to new challenges. Due to different educational biographies, the students don't show a homogeneous level of knowledge. Furthermore, their access to course content and their individual learning methods are very diverse. The existing lack of knowledge and the very unequal study speed have a significant influence on the learning behavior and learning motivation. During the first semesters, the dropout rate is appreciably higher. The reform project gives an overview of a didactic restructuring from a formerly conventional teaching and learning concept to a stronger combination of digital offers, combined with classical lectures in the basic modules of computer science. The teaching content is adjusted to the individual requirements and knowledge. Students with different previous knowledge get the possibility to increase their knowledge in different levels of abstraction. The aim of the reform project has to point out the possibilities, also the challenges of the digital process in higher education. At the same time the question has to be explored, how far does an accompanied and self-directed learning in own speed and in own individual depth of knowledge have a positive impact on the motivation and on the study success of a learner.}, language = {en} } @inproceedings{OPUS4-1990, title = {Software-intensive business: start-ups, ecosystems and platforms : proceedings of the International Workshop on Software-intensive Business: Start-ups, Ecosystems and Platforms (SiBW 2018) : Espoo, Finland, December 3, 2018. - (CEUR workshop proceedings ; 2305)}, editor = {Hyrynsalmi, Sami and Suominen, Arho and Jud, Christopher and Wang, Xiaofeng and Bosch, Jan and M{\"u}nch, J{\"u}rgen}, publisher = {RWTH Aachen}, address = {Aachen}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-19904}, pages = {253}, year = {2018}, abstract = {The very first International Workshop on Software-intensive Business: Start-ups, Ecosystems and Platforms (SiBW 2018) was held in Espoo (Greater Helsinki), Finland on December 3rd, 2018 - just a day before SLUSH 2018, the world's biggest startup event. Thanks to the collaboration with the organizers of SLUSH, many of the software-intensive business researchers and practitioners took part also in this event. The international workshop gathered together 35 registered attendees, from Sweden, Germany, Latvia, Finland, Italy and the Netherlands representing both academia as well as industry. The event itself was sponsored by VTT Technical Research Centre of Finland and the workshop was organized by the newly founded Software-intensive Business research community together with Software Startup Research Network (SSRN).}, language = {en} } @article{YayMartinezMadrid2017, author = {Yay, Emre and Mart{\´i}nez Madrid, Natividad}, title = {Creating recommendations in an energy-efficient and safety relevant driving system while considering driver stress and driver reaction}, series = {International journal of embedded systems : IJES}, volume = {9}, journal = {International journal of embedded systems : IJES}, number = {4}, publisher = {Inderscience Publ.}, address = {Gen{\`e}ve}, issn = {1741-1068}, pages = {298 -- 309}, year = {2017}, abstract = {Saving energy and road safety became important in the last decades, hence several driving assistant systems were developed that help to improve the driving behaviour. However, these driving systems cover the area of either energy-efficiency or safety. Furthermore, they do not consider the reaction of the driver to a shown recommendation and the driver stress level. In this paper, the decision process of showing a recommendation to the driver in an energy-efficient and safety relevant driving system is presented. The decision process considers the driver's reaction to a shown recommendation and the driver stress in order to increase the user acceptance and the road safety. The results of the evaluation showed that the driving system was able to show recommendations when needed, while suppressing recommendations when the driver ignored a recommendation repeatedly or when the driver was in stress.}, language = {en} } @inproceedings{Rehmann2017, author = {Rehmann, Markus}, title = {Urbaner Mixed-Reality Fahrsimulator}, series = {Wissenschaftliche Vertiefungskonferenz HuC - Design the Future : Informatik-Konferenz an der Hochschule Reutlingen, 22. November 2017}, booktitle = {Wissenschaftliche Vertiefungskonferenz HuC - Design the Future : Informatik-Konferenz an der Hochschule Reutlingen, 22. November 2017}, editor = {Kloos, Uwe}, publisher = {Hochschule Reutlingen}, address = {Reutlingen}, isbn = {978-3-00-057955-4}, pages = {69 -- 78}, year = {2017}, abstract = {Im Rahmen dieser Arbeit wurde ein urbaner Mixed-Reality Fahrsimulator umgesetzt. Die reale Umgebung wird hierbei in einer Greenscreen-Kammer mit Hilfe von Kamerabildern aus Nutzersicht und einem Chroma Key Shader innerhalb der virtuellen Umgebung sichtbar gemacht. Dies soll die Immersion und die Interaktivit{\"a}t innerhalb der virtuellen Umgebung durch die Darstellung und Verwendung von realen Elementen erh{\"o}hen. Als virtuelle Umgebung wurde eine zufallsgenerierte Stadt geschaffen, in der KI-Fahrzeuge fahren. Die Ergebnisse der Entwicklung dieses Fahrsimulators werden in dieser Arbeit erl{\"a}utert. Der Fahrsimulator soll der Entwicklung von menschzentrierten Human-Machine-Interfaces und Motion-Capture-Komponenten dienen.}, language = {de} } @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} } @article{WiemuthJungerLeitritzetal.2017, author = {Wiemuth, Markus and Junger, Denise and Leitritz, Martin and Neumann, Juliane and Neumuth, Thomas and Burgert, Oliver}, title = {Application fields for the new Object Management Group (OMG) Standards Case Management Model and Notation (CMMN) and Decision Management Notation (DMN) in the perioperative field}, series = {International Journal of Computer Assisted Radiology and Surgery}, volume = {12}, journal = {International Journal of Computer Assisted Radiology and Surgery}, number = {8}, issn = {1861-6410}, doi = {10.1007/s11548-017-1608-3}, pages = {1439 -- 1449}, year = {2017}, abstract = {Purpose: Medical processes can be modeled using different methods and notations.Currently used modeling systems like Business Process Model and Notation (BPMN) are not capable of describing the highly flexible and variable medical processes in sufficient detail. Methods: We combined two modeling systems, Business Process Management (BPM) and Adaptive Case Management (ACM), to be able to model non-deterministic medical processes. We used the new Standards Case Management Model and Notation (CMMN) and Decision Management Notation (DMN). Results: First, we explain how CMMN, DMN and BPMN could be used to model non-deterministic medical processes. We applied this methodology to model 79 cataract operations provided by University Hospital Leipzig, Germany, and four cataract operations provided by University Eye Hospital Tuebingen, Germany. Our model consists of 85 tasks and about 20 decisions in BPMN. We were able to expand the system with more complex situations that might appear during an intervention. Conclusion: An effective modeling of the cataract intervention is possible using the combination of BPM and ACM. The combination gives the possibility to depict complex processes with complex decisions. This combination allows a significant advantage for modeling perioperative processes.}, language = {en} } @article{Jugel2018, author = {Jugel, Dierk}, title = {Modeling interactive Enterprise Architecture visualizations: an extended architecture description}, series = {Complex systems informatics and modeling quarterly : CSIMQ}, journal = {Complex systems informatics and modeling quarterly : CSIMQ}, number = {16}, publisher = {Techn. Univ.}, address = {Riga}, issn = {2255-9922}, doi = {10.7250/csimq.2018-16.02}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-20493}, pages = {17 -- 35}, year = {2018}, abstract = {Enterprise architectures consist of a multitude of architecture elements, which relate in manifold ways to each other. Due to the high number of relationships between these elements, architectural analysis mechanisms are essential for all stakeholders to keep track and to work out relevant model characteristics. In practice EAs are often analyzed using visualizations by hand. However, the visualizations are often static and there are only few interaction possibilities. As a result, new visualizations have to be created or configured by experts if information demands change. In addition, hardly any tools are used for analysis of complex model characteristics. In this article we introduce an extended conceptualization of the architecture description that defines the structure of interactive visualizations and the integration of further tools to flexibly respond to the information demands of stakeholders. In addition, we develop a so-called Architecture Cockpit that realizes the extended conceptualization in a prototype. At the end we demonstrate and evaluate our approach through a practical test in a company in the finance and insurance industry.}, language = {en} } @inproceedings{KleinPenzelMartinezMadridetal.2017, author = {Klein, Agnes and Penzel, Thomas and Mart{\´i}nez Madrid, Natividad and Seepold, Ralf}, title = {Parameter set selection and classification of sleep phases tracing biovital data}, series = {Proceedings of the XVIII JARCA Workshop on Qualitative Systems and Applications in Diagnosis, Robotics and Ambient Intelligence : Almer{\´i}a, Spain, 23-29 June 2016. - (CEUR workshop proceedings ; 1812)}, booktitle = {Proceedings of the XVIII JARCA Workshop on Qualitative Systems and Applications in Diagnosis, Robotics and Ambient Intelligence : Almer{\´i}a, Spain, 23-29 June 2016. - (CEUR workshop proceedings ; 1812)}, editor = {Falomir, Zoe}, publisher = {RWTH}, address = {Aachen}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-16189}, pages = {5}, year = {2017}, abstract = {To assess the quality of a person's sleep, it is essential to examine the sleep behaviour by identifying the several sleep stages, their durations and sleep cycles. The established and gold standard procedure for sleep stage scoring is overnight polysomnography (PSG) with the Rechtschaffen and Kales (R-K) method. Unfortunately, the conduct of PSG is time-consuming and unfamiliar for the subjects and might have an impact of the recorded data. To avoid the disadvantages with PSG, it is important to make further investigations in low-cost home diagnostic systems. For this intention it is necessary to find suitable bio vital parameters for classifying sleep stages without any physical impairments at the same time. Due to the promising results in several publications we want to analyse existing methods for sleep stage classification based on the parameters body movement, heartbeat and respiration. Our aim was to find different behaviour patterns in the several sleep stages. Therefore, the average values of 15 whole-night PSG recordings -obtained from the 'DREAMS Subjects Database'- where analysed in the light of heartbeat, body movement and respiration with 10 different methods.}, language = {en} } @article{SugathanRossmannRanjan2018, author = {Sugathan, Praveen and Rossmann, Alexander and Ranjan, Kumar Rakesh}, title = {Toward a conceptualization of perceived complaint handling quality in social media and traditional service channels}, series = {European journal of marketing}, volume = {52}, journal = {European journal of marketing}, number = {5/6}, publisher = {Emerald}, address = {Bradford}, issn = {0309-0566}, doi = {10.1108/EJM-04-2016-0228}, pages = {973 -- 1006}, year = {2018}, abstract = {Purpose - This study aims to conceptualize and test the effect of consumers' perceptions of complaint handling quality (PCHQ) in both traditional and social media channels. Design/methodology/approach - Study 1 systematically reviews the relevant literature and then carries out a consumer and manager survey. This approach aims to conceptualize the dimensionality of PCHQ. Study 2 tests the effect of PCHQ on key marketing outcomes. Using survey data from a German telecommunications company, the study provides an explanation for the differences in outcomes across traditional (hotline) and social media channels. Findings - Study 1 reveals that PCHQ is best conceptualized as a five dimensional construct with 15 facets. There are significant differences between customers and managers in terms of the importance attached to the various dimensions. The construct shows strong psychometric properties with high reliability and validity, thereby opening up opportunities to treat these facets as measurement indicators for the construct. Study 2 indicates that the effect of PCHQ on consumer loyalty and word-of-mouth (WOM) communication is stronger in social media than in traditional channels. Procedural justice and the overall quality of service solutions emerge as general dimensions of PCHQ because they are equally important in both channels. In contrast, interactional justice, distributive justice and customer effort have varying effects across the two channels. Research limitations/implications - This study contributes to the understanding of a firm's channel selection for complaint handling in two ways. First, it evaluates and conceptualizes the PCHQ construct. Second, it compares the effects of different dimensions of PCHQ on key marketing outcomes across traditional and socialmedia channels. Practical implications - This study enables managers to understand the difference in efficacy attached to different dimensions of PCHQ. It further highlights such differences across traditional and social media service channels. For example, the effect of complaint handling on social media is of particular importance when generating WOM communication. Originality/value - This study offers a comprehensive conceptualization of the PCHQ construct and reveals the general and channel contingent effects of its different dimensions on key marketing outcomes.}, language = {en} } @article{YamanMunezeroMuenchetal.2017, author = {Yaman, Sezin Gizem and Munezero, Myriam and M{\"u}nch, J{\"u}rgen and Fagerholm, Fabian and Syd, Ossi and Aaltola, Mika and Palmu, Christina and M{\"a}nnist{\"o}, Tomi}, title = {Introducing continuous experimentation in large software-intensive product and service organisations}, series = {The journal of systems and software : JSS}, volume = {133}, journal = {The journal of systems and software : JSS}, publisher = {Elsevier}, address = {Amsterdam}, issn = {0164-1212}, doi = {10.1016/j.jss.2017.07.009}, pages = {195 -- 211}, year = {2017}, abstract = {Software development in highly dynamic environments imposes high risks to development organizations. One such risk is that the developed software may be of only little or no value to customers, wasting the invested development efforts.Continuous experiment ation, as an experiment-driven development approach, may reduce such development risks by iteratively testing product and service assumptions that are critical to the success of the software. Although several experiment-driven development approaches are available, there is little guidance available on how to introduce continuous experimentation into an organization. This article presents a multiple-case study that aims at better understanding the process of introducing continuous experimentation into an organization with an already established development process. The results from the study show that companies are open to adopting such an approach and learning throughout the introduction process. Several benefits were obtained, such as reduced development efforts, deeper customer insights, and better support for development decisions. Challenges included complex stakeholder structures, difficulties in defining success criteria, and building experimen- tation skills. Our findings indicate that organizational factors may limit the benefits of experimentation. Moreover, introducing continuous experimentation requires fundamental changes in how companies operate, and a systematic introduction process can increase the chances of a successful start.}, language = {en} } @article{FalessiJuristoWohlinetal.2018, author = {Falessi, Davide and Juristo, Natalia and Wohlin, Claes and Turhan, Burak and M{\"u}nch, J{\"u}rgen and Jedlitschka, Andreas and Oivo, Markku}, title = {Empirical software engineering experts on the use of students and professionals in experiments}, series = {Empirical software engineering : an international journal}, volume = {23}, journal = {Empirical software engineering : an international journal}, number = {1}, publisher = {Springer Science + Business Media B.V}, address = {Dordrecht}, issn = {1382-3256}, doi = {10.1007/s10664-017-9523-3}, pages = {452 -- 489}, year = {2018}, abstract = {Using students as participants remains a valid simplification of reality needed in laboratory contexts. It is an effective way to advance software engineering theories and technologies but, like any other aspect of study settings, should be carefully considered during the design, execution, interpretation, and reporting of an experiment. The key is to understand which developer population portion is being represented by the participants in an experiment. Thus, a proposal for describing experimental participants is put forward.}, language = {en} } @article{HohlKluenderBennekumetal.2018, author = {Hohl, Philipp and Kl{\"u}nder, Jil and Bennekum, Arie van and Lockard, Ryan and Gifford, James and M{\"u}nch, J{\"u}rgen and Stupperich, Michael and Schneider, Kurt}, title = {Back to the future: origins and directions of the "Agile Manifesto" - views of the originators}, series = {Journal of software engineering research and development : JSERD}, volume = {6}, journal = {Journal of software engineering research and development : JSERD}, number = {15}, publisher = {Springer}, address = {Berlin ; Heidelberg}, issn = {2195-1721}, doi = {10.1186/s40411-018-0059-z}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-19636}, pages = {1 -- 27}, year = {2018}, abstract = {In 2001, seventeen professionals set up the manifesto for agile software development. They wanted to define values and basic principles for better software development. On top of brought into focus, the manifesto has been widely adopted by developers, in software-developing organizations and outside the world of IT. Agile principles and their implementation in practice have paved the way for radical new and innovative ways of software and product development. In parallel, the understanding of the manifesto's underlying principles evolved over time. This, in turn, may affect current and future applications of agile principles. This article presents results from a survey and an interview study in collaboration with the original contributors of the manifesto for agile software development. Furthermore, it comprises the results from a workshop with one of the original authors. This publication focuses on the origins of the manifesto, the contributors' views from today's perspective, and their outlook on future directions. We evaluated 11 responses from the survey and 14 interviews to understand the viewpoint of the contributors. They emphasize that agile methods need to be carefully selected and agile should not be seen as a silver bullet. They underline the importance of considering the variety of different practices and methods that had an influence on the manifesto. Furthermore, they mention that people should question their current understanding of "agile" and recommend reconsidering the core ideas of the manifesto.}, language = {en} } @article{ChiovettoCurioEndresetal.2018, author = {Chiovetto, Enrico and Curio, Crist{\´o}bal and Endres, Dominik and Giese, Martin}, title = {Perceptual integration of kinematic components in the recognition of emotional facial expressions}, series = {Journal of vision : an ARVO journal ; JOV}, volume = {18}, journal = {Journal of vision : an ARVO journal ; JOV}, number = {4, 13}, publisher = {Rockville, Md.}, address = {ARVO}, issn = {1534-7362}, doi = {10.1167/18.4.13}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-16815}, pages = {1 -- 19}, year = {2018}, abstract = {According to a long-standing hypothesis in motor control, complex body motion is organized in terms of movement primitives, reducing massively the dimensionality of the underlying control problems. For body movements, this low dimensional organization has been convincingly demonstrated by the learning of low-dimensional representations from kinematic and EMG data. In contrast, the effective dimensionality of dynamic facial expressions is unknown, and dominant analysis approaches have been based on heuristically defined facial ''action units,'' which reflect contributions of individual face muscles. We determined the effective dimensionality of dynamic facial expressions by learning of a low dimensional model from 11 facial expressions. We found an amazingly low dimensionality with only two movement primitives being sufficient to simulate these dynamic expressions with high accuracy. This low dimensionality is confirmed statistically, by Bayesian model comparison of models with different numbers of primitives, and by a psychophysical experiment that demonstrates that expressions, simulated with only two primitives, are indistinguishable from natural ones. In addition, we find statistically optimal integration of the emotion information specified by these primitives in visual perception. Taken together, our results indicate that facial expressions might be controlled by a very small number of independent control units, permitting very low dimensional parametrization of the associated facial expression.}, language = {en} } @article{delaRosaFademrechtBuelthoffetal.2018, author = {de la Rosa, Stephan and Fademrecht, Laura and B{\"u}lthoff, Heinrich and Giese, Martin and Curio, Crist{\´o}bal}, title = {Two ways to facial expression recognition? Motor and visual information have different effects on facial expression recognition}, series = {Psychological science : a journal of the American Psychological Society}, volume = {29}, journal = {Psychological science : a journal of the American Psychological Society}, number = {8}, publisher = {Sage}, address = {London}, issn = {0956-7976}, doi = {10.1177/0956797618765477}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-18554}, pages = {1257 -- 1269}, year = {2018}, abstract = {Motor-based theories of facial expression recognition propose that the visual perception of facial expression is aided by sensorimotor processes that are also used for the production of the same expression. Accordingly, sensorimotor and visual processes should provide congruent emotional information about a facial expression. Here, we report evidence that challenges this view. Specifically, the repeated execution of facial expressions has the opposite effect on the recognition of a subsequent facial expression than the repeated viewing of facial expressions. Moreover, the findings of the motor condition, but not of the visual condition, were correlated with a nonsensory condition in which participants imagined an emotional situation. These results can be well accounted for by the idea that facial expression recognition is not always mediated by motor processes but can also be recognized on visual information alone.}, language = {en} } @article{BaumungFomin2018, author = {Baumung, Wjatscheslav and Fomin, Vladislav}, title = {Optimization model to extend existing production planning and control systems for the use of additive manufacturing technologies in the industrial production}, series = {Procedia manufacturing}, volume = {24}, journal = {Procedia manufacturing}, editor = {Denkena, Berend}, publisher = {Elsevier}, address = {Amsterdam}, issn = {2351-9789}, doi = {10.1016/j.promfg.2018.06.035}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-19606}, pages = {222 -- 228}, year = {2018}, abstract = {The use of additive manufacturing technologies for industrial production is constantly growing. This technology differs from the known production proecdures. The areas for scheduling, detailed and sequence planning are particularly important for additive production due to the long print times and flexible use of the production area. Therefore, production-relevant variables are considered and used for the production planning and control (PPC) of additive manufacturing machines. For this purpose, an optimization model is presented which shows a time-oriented build space utilization. In the implementation, a nesting algorithm is used to check the combinability of different models for each individual print job.}, language = {en} } @inproceedings{VinconPetrovThies2016, author = {Vin{\c{c}}on, Tobias and Petrov, Ilia and Thies, Christian}, title = {cIPT : shift of image processing technologies to column-oriented databases}, series = {New trends in databases and information systems : ADBIS 2016 short papers and workshops, BigDap, DCSA, DC, Prague, Czech Republic, August 28-31, 2016, proceedings}, booktitle = {New trends in databases and information systems : ADBIS 2016 short papers and workshops, BigDap, DCSA, DC, Prague, Czech Republic, August 28-31, 2016, proceedings}, editor = {Ivanovic, Mirjana}, publisher = {Springer}, address = {Cham}, isbn = {978-3-319-44066-8}, doi = {10.1007/978-3-319-44066-8}, pages = {96 -- 103}, year = {2016}, abstract = {The amount of image data has been rising exponentially over the last decades due to numerous trends like social networks, smartphones, automotive, biology, medicine and robotics. Traditionally, file systems are used as storage. Although they are easy to use and can handle large data volumes, they are suboptimal for efficient sequential image processing due to the limitation of data organisation on single images. Database systems and especially column-stores support more stuctured storage and access methods on the raw data level for entiere series. In this paper we propose definitions of various layouts for an efficient storage of raw image data and metadata in a column store. These schemes are designed to improve the runtime behaviour of image processing operations. We present a tool called column-store Image Processing Toolbox (cIPT) allowing to easily combine the data layouts and operations for different image processing scenarios. The experimental evaluation of a classification task on a real world image dataset indicates a performance increase of up to 15x on a column store compared to a traditional row-store (PostgreSQL) while the space consumption is reduced 7x. With these results cIPT provides the basis for a future mature database feature.}, language = {en} } @inproceedings{SchusterWoernerKelleretal.2016, author = {Schuster, Frank and W{\"o}rner, Markus and Keller, Christoph and Haueis, Martin and Curio, Crist{\´o}bal}, title = {Robust localization based on radar signal clustering}, series = {2016 IEEE Intelligent Vehicles Symposium (IV) Gothenburg, Sweden, June 19-22, 2016}, booktitle = {2016 IEEE Intelligent Vehicles Symposium (IV) Gothenburg, Sweden, June 19-22, 2016}, publisher = {IEEE}, address = {New York, NY}, isbn = {978-1-5090-1821-5}, doi = {10.1109/IVS.2016.7535485}, pages = {839 -- 844}, year = {2016}, abstract = {Significant advances have been achieved in mobile robot localization and mapping in dynamic environments, however these are mostly incapable of dealing with the physical properties of automotive radar sensors. In this paper we present an accurate and robust solution to this problem, by introducing a memory efficient cluster map representation. Our approach is validated by experiments that took place on a public parking space with pedestrians, moving cars, as well as different parking configurations to provide a challenging dynamic environment. The results prove its ability to reproducibly localize our vehicle within an error margin of below 1\% with respect to ground truth using only point based radar targets. A decay process enables our map representation to support local updates.}, language = {en} } @inproceedings{SchusterKellerRappetal.2016, author = {Schuster, Frank and Keller, Christoph and Rapp, Matthias and Haueis, Martin and Curio, Crist{\´o}bal}, title = {Landmark based radar SLAM using graph optimization}, series = {IEEE 19th International Conference on Intelligent Transportation Systems (ITSC), Windsor Oceanico Hotel, Rio de Janeiro, Brazil, November 1-4, 2016}, booktitle = {IEEE 19th International Conference on Intelligent Transportation Systems (ITSC), Windsor Oceanico Hotel, Rio de Janeiro, Brazil, November 1-4, 2016}, publisher = {IEEE}, address = {Piscataway, NJ}, isbn = {978-1-5090-1889-5}, doi = {10.1109/ITSC.2016.7795967}, pages = {2559 -- 2564}, year = {2016}, abstract = {On the way to achieving higher degrees of autonomy for vehicles in complicated, ever changing scenarios, the localization problem poses a very important role. Especially the Simultaneous Localization and Mapping (SLAM) problem has been studied greatly in the past. For an autonomous system in the real world, we present a very cost-efficient, robust and very precise localization approach based on GraphSLAM and graph optimization using radar sensors. We are able to prove on a dynamically changing parking lot layout that both mapping and localization accuracy are very high. To evaluate the performance of the mapping algorithm, a highly accurate ground truth map generated from a total station was used. Localization results are compared to a high precision DGPS/INS system. Utilizing these methods, we can show the strong performance of our algorithm.}, language = {en} } @inproceedings{BognerZimmermann2016, author = {Bogner, Justus and Zimmermann, Alfred}, title = {Towards integrating microservices with adaptable enterprise architecture}, series = {2016 IEEE 20th International Enterprise Distributed Object Computing Workshop (EDOCW), EDOCW 2016, 5. - 9. September 2016, Vienna, Austria}, booktitle = {2016 IEEE 20th International Enterprise Distributed Object Computing Workshop (EDOCW), EDOCW 2016, 5. - 9. September 2016, Vienna, Austria}, editor = {Dijkman, Remco}, publisher = {IEEE}, address = {Piscataway, NJ}, isbn = {978-1-4673-9933-3}, doi = {10.1109/EDOCW.2016.7584392}, pages = {158 -- 163}, year = {2016}, abstract = {IT environments that consist of a very large number of rather small structures like microservices, Internet of Things (IoT) components, or mobility systems are emerging to support flexible and agile products and services in the age of digital transformation. Biological metaphors of living and adaptable ecosystems with service-oriented enterprise architectures provide the foundation for self-optimizing, resilient run-time environments and distributed information systems. We are extending Enterprise Architecture (EA) methodologies and models that cover a high degree of heterogeneity and distribution to support the digital transformation and related information systems with micro-granular architectures. Our aim is to support flexibility and agile transformation for both IT and business capabilities within adaptable digital enterprise architectures. The present research paper investigates mechanisms for integrating Microservice Architectures (MSA) by extending original enterprise architecture reference models with elements for more flexible architectural metamodels and EA-mini-descriptions.}, 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{KuhrmannDieboldMuench2016, author = {Kuhrmann, Marco and Diebold, Philipp and M{\"u}nch, J{\"u}rgen}, title = {Software process improvement: a systematic mapping study on the state of the art}, series = {PeerJ computer science}, volume = {2}, journal = {PeerJ computer science}, number = {5}, publisher = {PeerJ Ltd.}, address = {London}, doi = {10.7717/peerj-cs.62}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-11861}, pages = {1 -- 38}, year = {2016}, abstract = {Software process improvement (SPI) has been 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 trends and emerging approaches? What are open issues? Still, we struggle to answer these questions about the current state of SPI and related research. In this article, we present results from an updated systematic mapping study to shed light on the field of SPI, to develop a big picture of the state of the art, and to draw conclusions for future research directions. An analysis of 769 publications draws a big picture of SPI-related research of the past quarter-century. Our study shows a high number of solution proposals, experience reports, and secondary studies, but only few theories and models on SPI in general. In particular, standard SPI models like CMMI and ISO/IEC 15,504 are analyzed, enhanced, and evaluated for applicability in practice, but these standards are also critically discussed, e.g., from the perspective of SPI in small to-medium-sized companies, which leads to new specialized frameworks. New and specialized frameworks account for the majority of the contributions found (approx. 38\%). Furthermore, we find a growing interest in success factors (approx. 16\%) to aid companies in conducting SPI and in adapting agile principles and practices for SPI (approx. 10\%). Beyond these specific topics, the study results also show an increasing interest into secondary studies with the purpose of aggregating and structuring SPI-related knowledge. Finally, the present study helps directing future research by identifying under-researched topics awaiting further investigation.}, language = {en} } @inproceedings{KuhrmannMuench2016, author = {Kuhrmann, Marco and M{\"u}nch, J{\"u}rgen}, title = {When teams go crazy : an environment to experience group dynamics in software project management courses}, series = {2016 IEEE/ACM 38th IEEE International Conference on Software Engineering Companion : ICSE 2016, 14 - 22 May 2016, Austin, Texas, USA : proceedings}, booktitle = {2016 IEEE/ACM 38th IEEE International Conference on Software Engineering Companion : ICSE 2016, 14 - 22 May 2016, Austin, Texas, USA : proceedings}, editor = {Dillon, Laura}, publisher = {ACM : The Association of Computing Machinery}, address = {New York, NY}, isbn = {978-1-4503-4205-6}, doi = {10.1145/2889160.2889194}, pages = {412 -- 421}, year = {2016}, abstract = {Software development consists to a large extend of humanbased processes with continuously increasing demands regarding interdisciplinary team work. Understanding the dynamics of software teams can be seen as highly important to successful project execution. Hence, for future project managers, knowledge about non-technical processes in teams is significant. In this paper, we present a course unit that provides an environment in which students can learn and experience the impact of group dynamics on project performance and quality. The course unit uses the Tuckman model as theoretical framework, and borrows from controlled experiments to organize and implement its practical parts in which students then experience the effects of, e.g., time pressure, resource bottlenecks, staff turnover, loss of key personnel, and other stress factors. We provide a detailed design of the course unit to allow for implementation in further software project management courses. Furthermore, we provide experiences obtained from two instances of this unit conducted in Munich and Karlskrona with 36 graduate students. We observed students building awareness of stress factors and developing counter measures to reduce impact of those factors. Moreover, students experienced what problems occur when teams work under stress and how to form a performing team despite exceptional situations.}, language = {en} } @inproceedings{KuhrmannMuench2016, author = {Kuhrmann, Marco and M{\"u}nch, J{\"u}rgen}, title = {Distributed software development with one hand tied behind the back: a course unit to experience the role of communication in GSD}, series = {11th IEEE International Conference on Global Software Engineering : ICGSE 2016 : companion proceedings : proceedings : 2 - 3 August 2016, Irvine, California}, booktitle = {11th IEEE International Conference on Global Software Engineering : ICGSE 2016 : companion proceedings : proceedings : 2 - 3 August 2016, Irvine, California}, publisher = {IEEE}, address = {Piscataway, NJ}, isbn = {978-1-5090-3625-7}, doi = {10.1109/ICGSEW.2016.13}, pages = {25 -- 30}, year = {2016}, abstract = {Software development consists to a large extent of human-based processes with continuously increasing demands regarding interdisciplinary team work. Understanding the dynamics of software teams can be seen as highly important to successful project execution. Hence, for future project managers, knowledge about non-technical processes in teams is significant. In this paper, we present a course unit that provides an environment in which students can learn and experience the role of different communication patterns in distributed agile software development. In particular, students gain awareness about the importance of communication by experiencing the impact of limitations of communication channels and the effects on collaboration and team performance. The course unit presented uses the controlled experiment instrument to provide the basic organization of a small software project carried out in virtual teams. We provide a detailed design of the course unit to allow for implementation in further courses. Furthermore, we provide experiences obtained from implementing this course unit with 16 graduate students. We observed students struggling with technical aspects and team coordination in general, while not realizing the importance of communication channels (or their absence). Furthermore, we could show the students that lacking communication protocols impact team coordination and performance regardless of the communication channels used.}, language = {en} } @inproceedings{KuhrmannMuenchDieboldetal.2016, author = {Kuhrmann, Marco and M{\"u}nch, J{\"u}rgen and Diebold, Philipp and Linssen, Oliver and Prause, Christian}, title = {On the use of hybrid development approaches in software and systems development : construction and test of the HELENA survey}, series = {Projektmanagement und Vorgehensmodelle 2016 : Arbeiten in hybriden Projekten : das Sowohl-als-Auch von Stabilit{\"a}t und Dynamik : gemeinsame Tagung der Fachgruppen Projektmanagement (WI-PM) und Vorgehensmodelle (WI-VM) im Fachgebiet Wirtschaftsinformatik der Gesellschaft f{\"u}r Informatik e.V. : 6. und 7. Oktober 2016 in Paderborn. - (Lecture notes in informatics ; P 263)}, booktitle = {Projektmanagement und Vorgehensmodelle 2016 : Arbeiten in hybriden Projekten : das Sowohl-als-Auch von Stabilit{\"a}t und Dynamik : gemeinsame Tagung der Fachgruppen Projektmanagement (WI-PM) und Vorgehensmodelle (WI-VM) im Fachgebiet Wirtschaftsinformatik der Gesellschaft f{\"u}r Informatik e.V. : 6. und 7. Oktober 2016 in Paderborn. - (Lecture notes in informatics ; P 263)}, editor = {Engstler, Martin}, publisher = {Gesellschaft f{\"u}r Informatik}, address = {Bonn}, isbn = {978-3-88579-657-2}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-11910}, pages = {59 -- 68}, year = {2016}, abstract = {A software process is the game plan to organize project teams and run projects. Yet, it still is a challenge to select the appropriate development approach for the respective context. A multitude of development approaches compete for the users' favor, but there is no silver bullet serving all possible setups. Moreover, recent research as well as experience from practice shows companies utilizing different development approaches to assemble the best-fitting approach for the respective company: a more traditional process provides the basic framework to serve the organization, while project teams embody this framework with more agile (and/or lean) practices to keep their flexibility. The paper at hand provides insights into the HELENA study with which we aim to investigate the use of "Hybrid dEveLopmENt Approaches in software systems development". We present the survey design and initial findings from the survey's test runs. Furthermore, we outline the next steps towards the full survey.}, language = {en} } @inproceedings{Henssler2015, author = {Henssler, Christian}, title = {Techniken zur Deformation von virtuellen Menschmodellen}, series = {Informatics inside: interaction design : Informatik-Konferenz an der Hochschule Reutlingen, 06. Mai 2015. - (Informatics inside ; 15)}, booktitle = {Informatics inside: interaction design : Informatik-Konferenz an der Hochschule Reutlingen, 06. Mai 2015. - (Informatics inside ; 15)}, editor = {Kloos, Uwe}, publisher = {Hochschule Reutlingen, INF}, address = {Reutlingen}, isbn = {978-3-00-049395-9}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-18649}, pages = {8 -- 15}, year = {2015}, abstract = {Gescannte Menschmodelle werden zunehmend f{\"u}r Experimente im VR-Bereich verwendet. Doch realistische Bewegungsabl{\"a}ufe bereitzustellen, ist eine zeitaufwendige Arbeit. Ziel der Ausarbeitung ist es, einen Workflow zu finden, der es erm{\"o}glicht, eine große Anzahl solcher Modelle innerhalb k{\"u}rzester Zeit zu verarbeiten. Daf{\"u}r betrachtet die Arbeit unterschiedliche Methoden zum Automatisieren von Skinning und Rigging, um Modelle in virtuellen Umgebungen auf Basis von Motion Tracking einsetzen zu k{\"o}nnen. Die Qualit{\"a}t der verarbeiteten Modelle wird anhand von Scans in unterschiedlichen Posen gepr{\"u}ft.}, language = {de} } @article{RothKottbauer2015, author = {Roth, Armin and Kottbauer, Markus}, title = {Ganzheitliches Performance Management erfordert ganzheitliches Controlling}, series = {Controller-Magazin}, journal = {Controller-Magazin}, number = {2}, publisher = {GBI-Genios}, address = {M{\"u}nchen}, issn = {0939-0359}, pages = {8 -- 14}, year = {2015}, abstract = {Die einzelne, allumfassende Managementmethode f{\"u}r ein ganzheitliches Leistungsmanagement gibt es nicht. Vielmehr ist das Zusammenspiel aller erfolgskritischen Managementdisziplinen im Rahmen eines integrativen Managementsystems wichtig, bei dem alle Akteure und Beteiligten auch bei unterschiedlichem Fokus und Sichtweise koordiniert an einem Strang ziehen. Erfolgskritisch ist es jedoch, dass eine unternehmensindividuelle Anpassung mit einem ganzheitlichen Erfahrungshintergrund geplant, komponiert und verzahnt wird. Management Cockpits k{\"o}nnen als Stufenl{\"o}sung einen wertvollen Beitrag erbringen, indem sie als Integrationsebene eine Transparenz und Kommunikationsplattform f{\"u}r ein ganzheitliches Leistungsmanagement generieren, selbst wenn die vollst{\"a}ndige, fachliche, methodische, prozessuale und technische Integration noch nicht komplett vollzogen bzw. erreicht ist.}, language = {de} } @inproceedings{HardockPetrovGottsteinetal.2015, author = {Hardock, Sergej and Petrov, Ilia and Gottstein, Robert and Buchmann, Alejandro}, title = {NoFTL for real : databases on real native Flash storage}, series = {Advances in database technology - EDBT 2015 : 18th International Conference on Extending Database Technology, Brussels, Belgium, March 23 - 27, 2015 : proceedings}, booktitle = {Advances in database technology - EDBT 2015 : 18th International Conference on Extending Database Technology, Brussels, Belgium, March 23 - 27, 2015 : proceedings}, editor = {Gustavo, Alonso}, publisher = {University of Konstanz, University Library}, address = {Konstanz}, isbn = {978-3-89318-067-7}, doi = {10.5441/002/edbt.2015.47}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-8066}, pages = {517 -- 520}, year = {2015}, abstract = {Flash SSDs are omnipresent as database storage. HDD replacement is seamless since Flash SSDs implement the same legacy hardware and software interfaces to enable backward compatibility. Yet, the price paid is high as backward compatibility masks the native behaviour, incurs significant complexity and decreases I/O performance, making it non-robust and unpredictable. Flash SSDs are black-boxes. Although DBMS have ample mechanisms to control hardware directly and utilize the performance potential of Flash memory, the legacy interfaces and black-box architecture of Flash devices prevent them from doing so. In this paper we demonstrate NoFTL, an approach that enables native Flash access and integrates parts of the Flashmanagement functionality into the DBMS yielding significant performance increase and simplification of the I/O stack. NoFTL is implemented on real hardware based on the OpenSSD research platform. The contributions of this paper include: (i) a description of the NoFTL native Flash storage architecture; (ii) its integration in Shore-MT and (iii) performance evaluation of NoFTL on a real Flash SSD and on an on-line data-driven Flash emulator under TPCB, C,E and H workloads. The performance evaluation results indicate an improvement of at least 2.4x on real hardware over conventional Flash storage; as well as better utilisation of native Flash parallelism.}, language = {en} } @inproceedings{PetrovGottsteinHardock2015, author = {Petrov, Ilia and Gottstein, Robert and Hardock, Sergej}, title = {DBMS on modern storage hardware}, series = {IEEE 31st International Conference on Data Engineering (ICDE), 2015 ; 13. - 17. April 2015, Seoul, Korea}, booktitle = {IEEE 31st International Conference on Data Engineering (ICDE), 2015 ; 13. - 17. April 2015, Seoul, Korea}, publisher = {IEEE}, address = {Piscataway, NJ}, isbn = {978-1-4799-7964-6}, doi = {10.1109/ICDE.2015.7113423}, pages = {1545 -- 1548}, year = {2015}, abstract = {In the present tutorial we perform a cross-cut analysis of database systems from the perspective of modern storage technology, namely Flash memory. We argue that neither the design of modern DBMS, nor the architecture of flash storage technologies are aligned with each other. The result is needlessly suboptimal DBMS performance and inefficient flash utilisation as well as low flash storage endurance and reliability. We showcase new DBMS approaches with improved algorithms and leaner architectures, designed to leverage the properties of modern storage technologies. We cover the area of transaction management and multi-versioning, putting a special emphasis on: (i) version organisation models and invalidation mechanisms in multi-versioning DBMS; (ii) Flash storage management especially on append-based storage in tuple granularity; (iii) Flash-friendly buffer management; as well as (iv) improvements in the searching and indexing models. Furthermore, we present our NoFTL approach to native Flash access that integrates parts of the flash-management functionality into the DBMS yielding significant performance increase and simplification of the I/O stack. In addition, we cover the basics of building large Flash storage for DBMS and revisit some of the RAID techniques and principles.}, language = {en} } @article{Rossmann2015, author = {Rossmann, Alexander}, title = {Social Media bedingen Kulturwandel}, series = {Acquisa : das Magazin f{\"u}r Marketing und Vertrieb}, volume = {61}, journal = {Acquisa : das Magazin f{\"u}r Marketing und Vertrieb}, number = {2}, issn = {0938-7927}, pages = {44 -- 47}, year = {2015}, abstract = {Im Kundenbeziehungsmanagement besteht ein großes Interesse an der Nutzung von Social Media. Allerdings finden sich aktuell kaum konzeptionell durchdachte und empirisch {\"u}berpr{\"u}fte L{\"o}sungen f{\"u}r Social CRM. Social Media bieten innovative Perspektiven f{\"u}r das Management der Kundenbeziehung. Die Nutzung dieser M{\"o}glichkeiten ist jedoch mit hohen Anforderungen an die Marketingstrategie verbunden, was zuweilen vernachl{\"a}ssigt wird.}, language = {de} } @inproceedings{LieglFritschTullius2015, author = {Liegl, Simone and Fritsch, Raphael and Tullius, Gabriela}, title = {Where Is Waldo? Visual search behavior in "Wimmelpictures"}, series = {Re:inventing information science in the networked society : proceedings of the 14th International Symposium on Information Science (ISI 2015), Zadar, Croatia, 19th - 21st May 2015}, booktitle = {Re:inventing information science in the networked society : proceedings of the 14th International Symposium on Information Science (ISI 2015), Zadar, Croatia, 19th - 21st May 2015}, editor = {Pehar, Franjo}, publisher = {vwh}, address = {Gl{\"u}ckstadt}, isbn = {978-3-76488-081-0}, doi = {10.5281/zenodo.17951}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-8745}, pages = {320 -- 325}, year = {2015}, abstract = {In order to explore an image, the human eye functions like a spotlight, scanning the content from one object to the next. This visual search behavior is implemented with the help of attention control. The following work surveys the visual search behavior in "Wimmelpictures", a special type of busy pictures. The research objective is to analyze different search strategies and to work out possible differences concerning age and gender. The university experiment is carried out by an eye tracker that records the fixations and saccades of the test persons. The results indicate three forms of search strategy: based on a pattern, based on feature selection, or a mixture of both. Our data shows the search for special features of the target is the most successful. Furthermore there are no differences concerning gender but some concerning age. All age groups need more time to locate the target with an increasing number of distractors in the image. The size of the target is also relevant as a larger target is found more quickly than the smaller one.}, language = {en} } @article{Rossmann2015, author = {Rossmann, Alexander}, title = {Gesch{\"a}ftschancen mit Social Media}, series = {3m5 script : Kundenmagazin}, journal = {3m5 script : Kundenmagazin}, number = {1}, publisher = {3m5.Media GmbH}, address = {Dresden}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-9973}, pages = {10 -- 11}, year = {2015}, abstract = {Wo treffe ich meine Kunden? Was lerne ich aus dem Feedback meiner User? Wie messe ich Erfolg? Im Sozialnetzwerk muss man die richtigen Fragen stellen, sagt Internet-Forscher Prof. Alexander Rossmann. Seine Studie Auf der Suche nach dem Return on Social Media an der Uni St. Gallen sorgte einst f{\"u}r Furore.}, language = {de} } @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} } @inproceedings{BognerDehnerVinconetal.2015, author = {Bogner, Justus and Dehner, Carolin and Vin{\c{c}}on, Tobias and Petrov, Ilia}, title = {Real time charging database benchmarking}, series = {Proceedings of the 17th International Conference on Information Integration and Web-Based Applications \& Services, iiWAS 2015, Brussels, Belgium, December 11-13, 2015}, booktitle = {Proceedings of the 17th International Conference on Information Integration and Web-Based Applications \& Services, iiWAS 2015, Brussels, Belgium, December 11-13, 2015}, editor = {Anderst-Kotsis, Gabriele}, publisher = {ACM}, address = {New York, NY}, isbn = {978-1-4503-3491-4}, doi = {10.1145/2837185.2837258}, pages = {5}, year = {2015}, abstract = {Real Time Charging (RTC) applications that reside in the telecommunications domain have the need for extremely fast database transactions. Today´s providers rely mostly on in-memory databases for this kind of information processing. A flexible and modular benchmark suite specifically designed for this domain provides a valuable framework to test the performance of different DB candidates. Besides a data and a load generator, the suite also includes decoupled database connectors and use case components for convenient customization and extension. Such easily produced test results can be used as guidance for choosing a subset of candidates for further tuning/testing and finally evaluating the database most suited to the chosen use cases. This is why our benchmark suite can be of value for choosing databases for RTC use cases.}, 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{LacherWaliaNygardetal.2015, author = {Lacher, Lisa and Walia, Gursimran and Nygard, Kendall and Fagerholm, Fabian and Pagels, Max and M{\"u}nch, J{\"u}rgen}, title = {A behavior marker for measuring non-technical skills of software professionals : an empirical study}, series = {International journal of software engineering and knowledge engineering}, volume = {25}, journal = {International journal of software engineering and knowledge engineering}, number = {9/10}, publisher = {World Scientific Publishing}, address = {Singapore}, issn = {0218-1940}, doi = {10.1142/S0218194015710084}, pages = {1733 -- 1738}, year = {2015}, abstract = {Managers recognize that software development teams need to be developed. 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 successfully used by airline and medical industries to measure NT skill performance. This research developed and validated a 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{YayMartinezMadridOrtegaRamirez2016, author = {Yay, Emre and Mart{\´i}nez Madrid, Natividad and Ortega Ram{\´i}rez, Juan Antonio}, title = {Detecting the adherence of driving rules in an energy-efficient, safe and adaptive driving system}, series = {Expert systems with applications}, journal = {Expert systems with applications}, number = {47}, publisher = {Elsevier}, address = {Amsterdam}, issn = {0957-4174}, doi = {10.1016/j.eswa.2015.10.044}, pages = {58 -- 70}, year = {2016}, abstract = {An adaptive and rule-based driving system is being developed that tries to improve the driving behavior in terms of the energy-efficiency and safety by giving recommendations. Therefore, the driving system has to monitor the adherence of driving rules by matching the rules to the driving behavior. However, existing rule matching algorithms are not sufficient, as the data within a driving system is changing frequently. In this paper a rule matching algorithm is introduced that is able to handle frequently changing data within the context of the driving system. 15 journeys were used to evaluate the performance of the rule matching algorithms. The results showed that the introduced algorithm outperforms existing algorithms in the context of the driving system. Thus, the introduced algorithm is suited for matching frequently changing data against rules with a higher performance, why it will be used in the driving system for the detection of broken energy-efficiency of safety-relevant driving rules.}, language = {en} } @inproceedings{YamanFagerholmMunezeroetal.2016, author = {Yaman, Sezin Gizem and Fagerholm, Fabian and Munezero, Myriam and M{\"u}nch, J{\"u}rgen and Aaltola, Mika and Palmu, Christina and M{\"a}nnist{\"o}, Tomi}, title = {Transitioning towards continuous experimentation in a large software product and service development organisation - a case study}, series = {Product-focused software process improvement : 17th International Conference, PROFES 2016, Trondheim, Norway, November 22-24, 2016, proceedings}, booktitle = {Product-focused software process improvement : 17th International Conference, PROFES 2016, Trondheim, Norway, November 22-24, 2016, proceedings}, editor = {Abrahamsson, Pekka}, publisher = {Springer}, address = {Cham}, isbn = {978-3-319-49094-6}, doi = {10.1007/978-3-319-49094-6_22}, pages = {344 -- 359}, year = {2016}, abstract = {Context: Companies need capabilities to evaluate the customer value of software intensive products and services. One way of systematically acquiring data on customer value is running continuous experiments as part of the overall development process. Objective: This paper investigates the first steps of transitioning towards continuous experimentation in a large company, including the challenges faced. Method: We conduct a single-case study using participant observation, interviews, and qualitative analysis of the collected data. Results: Results show that continuous experimentation was well received by the practitioners and practising experimentation helped them to enhance understanding of their product value and user needs. Although the complexities of a large multi-stakeholder business to-business (B2B) environment presented several challenges such as inaccessible users, it was possible to address impediments and integrate an experiment in an ongoing development project. Conclusion: Developing the capability for continuous experimentation in large organisations is a learning process which can be supported by a systematic introduction approach with the guidance of experts. We gained experience by introducing the approach on a small scale in a large organisation, and one of the major steps for future work is to understand how this can be scaled up to the whole development organisation.}, language = {en} } @inproceedings{WiedemannJacobsenKuhrmannMuenchetal.2016, author = {Wiedemann Jacobsen, Jan and Kuhrmann, Marco and M{\"u}nch, J{\"u}rgen and Diebold, Philipp and Felderer, Michael}, title = {On the role of software quality management in software process improvement}, series = {Product-focused software process improvement : 17th International Conference, PROFES 2016, Trondheim, Norway, November 22-24, 2016, proceedings}, booktitle = {Product-focused software process improvement : 17th International Conference, PROFES 2016, Trondheim, Norway, November 22-24, 2016, proceedings}, editor = {Abrahamsson, Pekka}, publisher = {Springer}, address = {Cham}, isbn = {978-3-319-49094-6}, doi = {10.1007/978-3-319-49094-6_21}, pages = {327 -- 343}, year = {2016}, abstract = {Software Process Improvement (SPI) programs have been implemented, inter alia, to improve quality and speed of software development. SPI addresses many aspects ranging from individual developer skills to entire organizations. It comprises, for instance, the optimization of specific activities in the software lifecycle as well as the creation of organizational awareness and project culture. In the course of conducting a systematic mapping study on the state-of-the-art in SPI from a general perspective, we observed Software Quality Management (SQM) being of certain relevance in SPI programs. In this paper, we provide a detailed investigation of those papers from the overall systematic mapping study that were classified as addressing SPI in the context of SQM (including testing). From the main study's result set, 92 papers were selected for an in-depth systematic review to study the contributions and to develop an initial picture of how these topics are addressed in SPI. Our findings show a fairly pragmatic contribution set in which different solutions are proposed, discussed, and evaluated. Among others, our findings indicate a certain reluctance towards standard quality or (test) maturity models and a strong focus on custom review, testing, and documentation techniques, whereas a set of five selected improvement measures is almost equally addressed.}, language = {en} } @inproceedings{VelicuMartinezMadridSeepold2016, author = {Velicu, Oana Ramona and Mart{\´i}nez Madrid, Natividad and Seepold, Ralf}, title = {Experimental sleep phases monitoring}, series = {3rd IEEE EMBS International Conference on Biomedical and Health Informatics}, booktitle = {3rd IEEE EMBS International Conference on Biomedical and Health Informatics}, publisher = {IEEE}, address = {Piscataway, NJ}, isbn = {978-1-5090-2455-1}, doi = {10.1109/BHI.2016.7455976}, pages = {625 -- 628}, year = {2016}, abstract = {Nowadays there is a rich diversity of sleep monitoring systems available on the market. They promise to offer information about sleep quality of the user by recording a limited number of vital signals, mainly heart rate and body movement. Typically, fitness trackers, smart watches, smart shirts, smartphone applications or patches do not provide access to the raw sensor data. Moreover, the sleep classification algorithm and the agreement ratio with the gold standard, polysomnography (PSG) are not disclosed. Some commercial systems record and store the data on the wearable device, but the user needs to transfer and import it into specialised software applications or return it to the doctor, for clinical evaluation of the data set. Thus an immediate feedback mechanism or the possibility of remote control and supervision are lacking. Furthermore, many such systems only distinguish between sleep and wake states, or between wake, light sleep and deep sleep. It is not always clear how these stages are mapped to the four known sleep stages: REM, NREM1, NREM2, NREM3-4. [1] The goal of this research is to find a reduced complexity method to process a minimum number of bio vital signals, while providing accurate sleep classification results. The model we propose offers remote control and real time supervision capabilities, by using Internet of Things (IoT) technology. This paper focuses on the data processing method and the sleep classification logic. The body sensor network representing our data acquisition system will be described in a separate publication. Our solution showed promising results and a good potential to overcome the limitations of existing products. Further improvements will be made and subjects with different age and health conditions will be tested.}, language = {en} } @article{ThiesKhachaturyanZemeletal.2016, author = {Thies, Christian and Khachaturyan, Galina and Zemel, Assaf and Kemkemer, Ralf}, title = {Image analysis of self-organized multicellular patterns : multicellular pattern formation on compliant elastomer surfaces as model system}, series = {Current directions in biomedical engineering}, volume = {2}, journal = {Current directions in biomedical engineering}, number = {1}, publisher = {De Gruyter}, address = {Berlin}, doi = {10.1515/cdbme-2016-0116}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-12348}, pages = {523 -- 527}, year = {2016}, abstract = {Analysis of multicellular patterns is required to understand tissue organizational processes. By using a multi-scale object oriented image processing method, the spatial information of cells can be extracted automatically. Instead of manual segmentation or indirect measurements, such as general distribution of contrast or flow, the orientation and distribution of individual cells is extracted for quantitative analysis. Relevant objects are identified by feature queries and no low-level knowledge of image processing is required.}, language = {en} } @inproceedings{YayMartinezMadridOrtegaRamirez2016, author = {Yay, Emre and Mart{\´i}nez Madrid, Natividad and Ortega Ram{\´i}rez, Juan Antonio}, title = {Influence of stress in driving behaviour}, series = {XIV Mediterranean Conference on Medical and Biological Engineering and Computing : MEDICON 2016, March 31st - April 2nd 2016, Paphos, Cyprus. - (IFMBE Proceedings ; 57 : SpringerLink : B{\"u}cher)}, booktitle = {XIV Mediterranean Conference on Medical and Biological Engineering and Computing : MEDICON 2016, March 31st - April 2nd 2016, Paphos, Cyprus. - (IFMBE Proceedings ; 57 : SpringerLink : B{\"u}cher)}, editor = {Kyriacou, Efthyvoulos}, publisher = {Springer}, address = {Cham}, isbn = {978-3-319-32703-7}, doi = {10.1007/978-3-319-32703-7}, pages = {1156 -- 1161}, year = {2016}, abstract = {In the last decades, several driving systems were developed to improve the driving behaviour in energy efficiency or safety. However, these driving systems cover either the area of energy-efficiency or safety. Furthermore, they do not consider the stress level of the driver when showing a recommendation, although stress can lead to an unsafe or inefficient driving behaviour. In this paper, an approach is presented to consider the driver stress level in a driving system for safe and energy-efficient driving behaviour. The driving system tries to suppress a recommendation when the driver is in stress in order not to stress the driver additionally with recommendations in a stressful driving situation. This can lead to an increase in the road safety and in the user acceptance of the driving system, as the driver is not getting bothered or stressed by the driving system. The evaluation of the approach showed, that the driving system is able to show recommendations to the driver, while also reacting to a high stress level by suppressing recommendations in order not to stress the driver additionally.}, language = {en} } @inproceedings{DatkoScherzVelicuetal.2016, author = {Datko, Patrick and Scherz, Wilhelm Daniel and Velicu, Oana Ramona and Seepold, Ralf and Mart{\´i}nez Madrid, Natividad}, title = {Personal recommendation system for improving sleep quality}, series = {Intelligent decision technologies 2016 : proceedings of the 8th KES International Conference on Intelligent Decision Technologies (KES-IDT 2016). - part I. - (Smart innovation, systems and technologies ; 56)}, booktitle = {Intelligent decision technologies 2016 : proceedings of the 8th KES International Conference on Intelligent Decision Technologies (KES-IDT 2016). - part I. - (Smart innovation, systems and technologies ; 56)}, editor = {Czarnowski, Ireneusz}, publisher = {Springer}, address = {Cham}, isbn = {978-3-319-39630-9}, doi = {10.1007/978-3-319-39630-9_34}, pages = {405 -- 412}, year = {2016}, abstract = {Sleep is an important aspect in life of every human being. The average sleep duration for an adult is approximately 7 h per day. Sleep is necessary to regenerate physical and psychological state of a human. A bad sleep quality has a major impact on the health status and can lead to different diseases. In this paper an approach will be presented, which uses a long-term monitoring of vital data gathered by a body sensor during the day and the night supported by mobile application connected to an analyzing system, to estimate sleep quality of its user as well as give recommendations to improve it in real-time. Actimetry and historical data will be used to improve the individual recommendations, based on common techniques used in the area of machine learning and big data analysis.}, language = {en} } @inproceedings{BognerZimmermann2016, author = {Bogner, Justus and Zimmermann, Alfred}, title = {Adaptable digital enterprise architecture with microservices}, series = {Proceedings of the 10th Advanced Summer School on Service Oriented Computing : June 27 - July 1, 2016, Hersonissos, Crete, Greece. - (IBM research report ; RC 26524)}, booktitle = {Proceedings of the 10th Advanced Summer School on Service Oriented Computing : June 27 - July 1, 2016, Hersonissos, Crete, Greece. - (IBM research report ; RC 26524)}, editor = {Barzen, Johanna}, publisher = {IBM Research Division}, address = {Almaden}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-13849}, pages = {59 -- 61}, year = {2016}, abstract = {The fast moving process of digitization1 demands flexibility in order to adapt to rapidly changing business requirements and newly emerging business opportunities. New features have to be developed and deployed to the production environment a lot faster. To be able to cope with this increased velocity and pressure, a lot of software developing companies have switched to a Microservice Architecture (MSA) approach. Applications built this way consist of several fine-grained and heterogeneous services that are independently scalable and deployable. However, the technological and business architectural impacts of microservices based applications directly affect their integration into the digital enterprise architecture. As a consequence, traditional Enterprise Architecture Management (EAM) approaches are not able to handle the extreme distribution, diversity, and volatility of micro-granular systems and services. We are therefore researching mechanisms for dynamically integrating large amounts of microservices into an adaptable digital enterprise architecture.}, language = {en} } @inproceedings{KuhrmannKonopkaNellemannetal.2016, 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?}, series = {Software engineering 2016 : 23. - 26. Februar 2016, Wien, {\"O}sterreich}, booktitle = {Software engineering 2016 : 23. - 26. Februar 2016, Wien, {\"O}sterreich}, editor = {Knoop, Jens}, publisher = {Gesellschaft f{\"u}r Informatik}, address = {Bonn}, isbn = {978-3-88579-646-6}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-11980}, pages = {55 -- 56}, year = {2016}, 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? 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 are analyzed and evaluated for applicability, especially 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. This summary refers to the paper Software process improvement : where is the evidence? [Ku15]. This paper was published as full research paper in the ICSSP'2015 proceedings.}, language = {en} } @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{FagerholmKuhrmannMuench2017, author = {Fagerholm, Fabian and Kuhrmann, Marco and M{\"u}nch, J{\"u}rgen}, title = {Guidelines for using empirical studies in software engineering education}, series = {PeerJ computer science}, volume = {2017}, journal = {PeerJ computer science}, number = {4. September}, publisher = {PeerJ Ltd.}, address = {London}, issn = {2376-5992}, doi = {10.7717/peerj-cs.131}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-15682}, pages = {1 -- 36}, year = {2017}, abstract = {Software engineering education is under constant pressure to provide students with industry-relevant knowledge and skills. Educators must address issues beyond exercises and theories that can be directly rehearsed in small settings. Industry training has similar requirements of relevance as companies seek to keep their workforce up to date with technological advances. Real-life software development often deals with large, software-intensive systems and is influenced by the complex effects of teamwork and distributed software development, which are hard to demonstrate in an educational environment. A way to experience such effects and to increase the relevance of software engineering education is to apply empirical studies in teaching. In this paper, we show how different types of empirical studies can be used for educational purposes in software engineering. We give examples illustrating how to utilize empirical studies, discuss challenges, and derive an initial guideline that supports teachers to include empirical studies in software engineering courses. Furthermore, we give examples that show how empirical studies contribute to high-quality learning outcomes, to student motivation, and to the awareness of the advantages of applying software engineering principles. Having awareness, experience, and understanding of the actions required, students are more likely to apply such principles under real-life constraints in their working life.}, language = {en} } @inproceedings{KuhrmannMuench2018, author = {Kuhrmann, Marco and M{\"u}nch, J{\"u}rgen}, title = {Enhancing software engineering education through experimentation: an experience report}, series = {Conference proceedings ICE/IEEE ITMC : 2018 IEEE International Conference on Engineering, Technology and Innovation (ICE/ITMC) : Stuttgart, 17.06. - 20.06.2018}, booktitle = {Conference proceedings ICE/IEEE ITMC : 2018 IEEE International Conference on Engineering, Technology and Innovation (ICE/ITMC) : Stuttgart, 17.06. - 20.06.2018}, publisher = {IEEE}, address = {Piscataway, NJ}, isbn = {978-1-5386-1469-3}, doi = {10.1109/ICE.2018.8436357}, pages = {9}, year = {2018}, abstract = {Software engineering courses have to deliver theoretical and technical knowledge and skills while establishing links to practice. However, due to course goals or resource limitations, it is not always possible or even meaningful to set up complete projects and let students work on a real piece of software. For instance, if students shall understand the impact of group dynamics on productivity, a particular software to be developed is of less interest than an environment in which students can learn about team-related phenomena. To address this issue, we use experimentation as a teaching tool in software engineering courses. Experiments help to precisely characterize and study a problem in a systematic way, to observe phenomena, and to develop and evaluate solutions. Furthermore, experiments help establishing short feedback and learning cycles, and they also allow for experiencing risk and failure scenarios in a controlled environment. In this paper, we report on three courses in which we implemented different experiments and we share our experiences and lessons learned. Using these courses, we demonstrate how to use classroom experiments, and we provide a discussion on the feasibility based on formal and informal course evaluations. This experience report thus aims to help teachers integrating small- and medium sized experiments in their courses.}, 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} } @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} } @incollection{RossmannTangemann2015, author = {Rossmann, Alexander and Tangemann, Michael}, title = {Kundenservice 2.0: Kundenverhalten und Serviceleistungen in der digitalen Transformation}, series = {Marktpl{\"a}tze im Umbruch}, booktitle = {Marktpl{\"a}tze im Umbruch}, editor = {Linnhoff-Popien, Claudia}, publisher = {Springer Vieweg}, address = {Berlin, Heidelberg}, isbn = {978-366-24378-2-7}, doi = {10.1007/978-3-662-43782-7_19}, pages = {161 -- 172}, year = {2015}, abstract = {Die digitale Transformation bezieht sich auf die zunehmende Digitalisierung von Inhalten und Prozessen und die steigende Bedeutung digitaler Medien in Wirtschaft und Gesellschaft. Dabei wird der Wandel u. a. durch die Evolution in der Nutzung des Internets getrieben. W{\"a}hrend in der Phase des so genannten Web 1.0 die Publikation und Verbreitung statischer Inhalte im Fokus stand, werden durch das Web 2.0 {\"u}berwiegend Prozesse der dezentralen Erzeugung und einfachen Verbreitung von User Generated Content stimuliert. Unternehmen m{\"u}ssen auf diese Ver{\"a}nderungen reagieren, um die eigene Wettbewerbsf{\"a}higkeit nachhaltig abzusichern. Der vorliegende Beitrag konzentriert sich auf die Weiterentwicklung des Kundenservice. Dieser wurde in den zur{\"u}ckliegenden Jahren von vielen Unternehmen {\"u}berwiegend als Kostenfaktor mit geringer strategischer Bedeutung eingestuft. Diese Sichtweise hat sich in der digitalen Transformation grundlegend ge{\"a}ndert. Kunden k{\"o}nnen heute M{\"a}ngel an Produkten und Dienstleistungen durch Foren und Social Media Kan{\"a}le sofort und mit hoher Reichweite adressieren. Unternehmen m{\"u}ssen auf den gleichen Kan{\"a}len reagieren, um die Multiplikation negativer Sichtweisen einzud{\"a}mmen und {\"U}bertragungseffekte auf traditionelle Medien zu vermeiden. Gleichzeitig entstehen durch digitale Kan{\"a}le v{\"o}llig neue Serviceangebote, die sich nachhaltig auf die unternehmerische Wettbewerbsf{\"a}higkeit auswirken. Der vorliegende Beitrag gibt zun{\"a}chst einen {\"U}berblick zu wesentlichen Entwicklungslinien der digitalen Transformation. Auf dieser Grundlage werden die Perspektiven f{\"u}r Unternehmen zur Integration digitaler Medien in die eigene Wertsch{\"o}pfungskette skizziert. Dar{\"u}ber hinaus steht v. a. die Ver{\"a}nderung des Kundenservice im so genannten Web 2.0 zur Diskussion. Ein Ausblick auf zuk{\"u}nftige Entwicklungen der Digitalisierung rundet den Beitrag entsprechend ab.}, language = {de} } @inproceedings{KuhrmannDieboldMacDonelletal.2017, author = {Kuhrmann, Marco and Diebold, Philipp and MacDonell, Stephen and M{\"u}nch, J{\"u}rgen}, title = {2nd Workshop on Hybrid Development Approaches in Software Systems Development}, series = {Product-focused software process improvement : 18th International Conference, PROFES 2017, Innsbruck, Austria, November 29-December 1, 2017, proceedings. - (Lecture notes in computer science ; 10611)}, booktitle = {Product-focused software process improvement : 18th International Conference, PROFES 2017, Innsbruck, Austria, November 29-December 1, 2017, proceedings. - (Lecture notes in computer science ; 10611)}, editor = {Felderer, Michael}, publisher = {Springer}, address = {Cham}, isbn = {495987646}, doi = {10.1007/978-3-319-69926-4_28}, pages = {397 -- 403}, year = {2017}, abstract = {Software and system development is complex and diverse, and a multitude of development approaches is used and combined with each other to address the manifold challenges companies face today. To study the current state of the practice and to build a sound understanding about the utility of different development approaches and their application to modern software system development, in 2016, we launched the HELENA initiative. This paper introduces the 2nd HELENA workshop and provides an overview of the current project state. In the workshop, six teams present initial findings from their regions, impulse talk are given, and further steps of the HELENA roadmap are discussed.}, language = {en} } @inproceedings{FagerholmKuhrmannMuench2018, author = {Fagerholm, Fabian and Kuhrmann, Marco and M{\"u}nch, J{\"u}rgen}, title = {Guidelines for using empirical studies in software engineering education}, series = {Software engineering and software management 2018 : Tagung vom 5.-9. M{\"a}rz in Ulm. - (GI-Edition : Lecture notes in informatics : proceedings ; 279)}, booktitle = {Software engineering and software management 2018 : Tagung vom 5.-9. M{\"a}rz in Ulm. - (GI-Edition : Lecture notes in informatics : proceedings ; 279)}, editor = {Tichy, Matthias}, publisher = {Gesellschaft f{\"u}r Informatik}, address = {Bonn}, isbn = {978-3-88579-673-2}, url = {http://nbn-resolving.de/urn:nbn:de:bsz:rt2-opus4-19651}, pages = {85 -- 87}, year = {2018}, abstract = {Software engineering education is supposed to provide students with industry-relevant knowledge and skills. Educators must address issues beyond exercises and theories that can be directly rehearsed in small settings. A way to experience such effects and to increase the relevance of software engineering education is to apply empirical studies in teaching. In our article, we show how different types of empirical studies can be used for educational purposes in software engineering. We give examples illustrating how to utilize empirical studies, discuss challenges, and derive an initial guideline that supports teachers to include empirical studies in software engineering courses.}, language = {en} } @article{Rossmann2018, author = {Rossmann, Alexander}, title = {Digital maturity and marketing orientation: theoretical foundation and measurement models}, series = {AMA Summer Educators' Conference proceedings}, volume = {29}, journal = {AMA Summer Educators' Conference proceedings}, publisher = {American Marketing Association}, address = {Chicago, Ill.}, issn = {1054-0806}, pages = {MS5 -- MS6}, year = {2018}, abstract = {This paper focuses on the conceptualization of the construct of digital maturity, the effect of digital maturity on corporate performance, and the interdependencies between digital maturity and market orientation with respect to their integrated impact on corporate performance.}, language = {en} } @article{GebregiorgisThiesBurgert2017, author = {Gebregiorgis, Aster and Thies, Christian and Burgert, Oliver}, title = {Survey and classification of radiologic image reference databases}, series = {International journal of computer assisted radiology and surgery. - Vol. 12, 2017, Issue 1, Supplement: CARS 2017. Computer assisted radiology and surgery : proceedings of the 31st International Congress and Exhibition, Barcelona, Spain, June 20-24, 2017}, volume = {12}, journal = {International journal of computer assisted radiology and surgery. - Vol. 12, 2017, Issue 1, Supplement: CARS 2017. Computer assisted radiology and surgery : proceedings of the 31st International Congress and Exhibition, Barcelona, Spain, June 20-24, 2017}, number = {Issue 1, Supplement}, editor = {Berliner, Leonard}, publisher = {Springer}, address = {Berlin ; Heidelberg}, issn = {1861-6410}, doi = {10.1007/s11548-017-1588-3}, pages = {185 -- 187}, year = {2017}, abstract = {The aim of this paper is to provide an extendable categorization system for radiologic images reference databases. This categorization system has been applied to all applicable databases which we were able to identify during a thorough survey.}, language = {en} } @inproceedings{ZurawkaHoffmannBurgert2018, author = {Zurawka, Vanessa and Hoffmann, R{\"u}diger and Burgert, Oliver}, title = {Control of real-time MRI with a 3D-controller during radiofrequency ablation}, series = {Medical Imaging 2018: image-guided procedures, robotic interventions, and modeling. - (Proceedings of SPIE ; volume 10576)}, booktitle = {Medical Imaging 2018: image-guided procedures, robotic interventions, and modeling. - (Proceedings of SPIE ; volume 10576)}, editor = {Fei, Baowei}, publisher = {SPIE}, address = {[Bellingham, Wash.]}, isbn = {9781510616417}, doi = {10.1117/12.2293705}, pages = {8}, year = {2018}, abstract = {Radiofrequency ablation is an ablation technique to treat tumors with focused heat. Computer tomography, ultrasound and magnetic resonance imaging (MRI) are imaging modalities which can be used for image-guided procedures. MRI offers several advantages in comparison to the other imaging modalities, such as radiation-free fluoroscopic imaging, temperature mapping, a high-soft-tissue contrast and free selection of imaging planes. This work addresses the application of 3Dcontrollers for controlling interventional, fluoroscopic MR sequences at the scenario of MR guided radiofrequency ablation of hepatic malignancies. During this procedure, the interventionalist can monitor the targeting of the tumor with near-real time fluoroscopic sequences. In general, adjustments of the imaging planes are necessary during tumor targeting, which is performed by an assistant in the control room. Therefore, communication between the interventionalist in the scanner room and the assistant in the control room is essential. However, verbal communication is impaired due to the loud scanning noises. Alternatively, non-verbal communication between the two persons is possible, however limited to a few gestures and susceptible to misunderstandings. This work is analyzing different 3D-controllers to enable control of interventional MR sequences during MR-guided procedures directly by the interventionalist. Leap Motion, Wii Remote, SpaceNavigator, Phantom Omni and Foot Switch were selected. For that a simulation was built in C++ with VTK to feign the real scenario for test purposes. Previous results showed that Leap Motion is not suitable for the application while Wii Remote and Foot Switch are possible input devices. Final evaluation showed a generally time reduction with the use of 3D-controllers. Best results were reached with Wii Remote in 34 seconds. Handholding input devices like Wii Remote have further potential to integrate them in real environment to reduce intervention time.}, language = {en} } @article{NeumannWiemuthBurgertetal.2017, author = {Neumann, Juliane and Wiemuth, Markus and Burgert, Oliver and Neumuth, Thomas}, title = {Application of activity semantics and BPMN 2.0 in the generation and modeling of generic surgical process models}, series = {International journal of computer assisted radiology and surgery. - Vol. 12, 2017, Issue 1, Supplement: CARS 2017. Computer assisted radiology and surgery : proceedings of the 31st International Congress and Exhibition, Barcelona, Spain, June 20-24, 2017}, volume = {12}, journal = {International journal of computer assisted radiology and surgery. - Vol. 12, 2017, Issue 1, Supplement: CARS 2017. Computer assisted radiology and surgery : proceedings of the 31st International Congress and Exhibition, Barcelona, Spain, June 20-24, 2017}, number = {Issue 1, Supplement}, publisher = {Springer}, address = {Berlin ; Heidelberg}, issn = {1861-6410}, doi = {10.1007/s11548-017-1588-3}, pages = {48 -- 49}, year = {2017}, abstract = {In this paper a method for the generation of gSPM with ontology-based generalization was presented. The resulting gSPM was modeled with BPMN/BPMNsix in an efficient way and could be executed with BPMN workflow engines. In the next step the implementation of resource concepts, anatomical structures, and transition probabilities for workflow execution will be realized.}, language = {en} } @inproceedings{WiemuthKroisantBurgert2017, author = {Wiemuth, Markus and Kroisant, Anton and Burgert, Oliver}, title = {Service-orientierte Enterprise-Architektur zur chirugischen Prozesssteuerung}, series = {CURAC 2017 - Tagungsband : 16. Jahrestagung der Deutschen Gesellschaft f{\"u}r Computer- und Roboterassistierte Chirurgie (CURAC) : 5.-7. Oktober 2017, Hannover}, booktitle = {CURAC 2017 - Tagungsband : 16. Jahrestagung der Deutschen Gesellschaft f{\"u}r Computer- und Roboterassistierte Chirurgie (CURAC) : 5.-7. Oktober 2017, Hannover}, editor = {Burgner-Kahrs, Jessica}, publisher = {PZH Verlag, TEWISS-Technik und Wissen GmbH}, address = {Garbsen}, isbn = {978-3-95900-158-8}, pages = {237 -- 241}, year = {2017}, abstract = {Diese Arbeit liefert einen Konzeptentwurf, der die Integration verschiedener Systeme mit prozessrelevanten klinischen Diensten gew{\"a}hrleistet. Chirurgische Abl{\"a}ufe werden in Form von Prozessen modelliert. Die Wahl der Notation und die Art der Modellierung dieser Prozesse spielt in der heutigen Forschung in diesem Gebiet eine zentrale Rolle. Sind diese Prozesse modelliert, besteht die M{\"o}glichkeit, diese in einer Workflow-Engine automatisiert auszuf{\"u}hren. Im Rahmen der Entwicklung eines Workflow-Managment-Systems stellt sich die Frage, wie die Anbindung dieser Workflow-Engine mit anderen Systemen erfolgen soll. In der Arbeit werden Schnittstellen abstrakt in der Web Services Description Language (WSDL) definiert. Darum werden automatisiert Artefakte erzeugt. Auf der Grundlage dieser Artefakte erfolgt die Integration der Systeme. Die Workflow-Engine kommunizieren {\"u}ber SOAP-Nachrichten (Simple Object Access Protocol) mit den entsprechenden Systemen. Dieser Ansatz wurde mithilfe eines Prototyps validiert und umgesetzt.}, language = {de} } @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} } @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{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{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{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{ScheyttWiemuthBurgert2017, author = {Scheytt, Josia and Wiemuth, Markus and Burgert, Oliver}, title = {Binary endoscope localization from laparoscopic video as virtual sensor for automatic workflow detection}, series = {CURAC 2017 - Tagungsband : 16. Jahrestagung der Deutschen Gesellschaft f{\"u}r Computer- und Roboterassistierte Chirurgie (CURAC) : 5.-7. Oktober 2017, Hannover}, booktitle = {CURAC 2017 - Tagungsband : 16. Jahrestagung der Deutschen Gesellschaft f{\"u}r Computer- und Roboterassistierte Chirurgie (CURAC) : 5.-7. Oktober 2017, Hannover}, editor = {Burgner-Kahrs, Jessica}, publisher = {PZH Verlag, TEWISS-Technik und Wissen GmbH}, address = {Garbsen}, isbn = {978-3-95900-158-8}, pages = {191 -- 196}, year = {2017}, abstract = {This paper contributes to the automatic detection of perioperative workflow by developing a binary endoscope localization. Automated situation recognition in the context of an intelligent operating room requires the automatic conversion of low level cues into more abstract high level information. Imagery from a laparoscope delivers rich content that is easy to obtain but hard to process. We introduce a system which detects if the endoscope's distal tip is inside or outsiede the patient based on the endoscope video. This information can be used as one parameter in a situation recognition pipeline. Our localization performs in real-time at a video resolution of 1280x720 and 5-fold cross validation yields mean F1-scores of up to 0,94 on videos of 7 laparoscopies.}, language = {en} } @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} } @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} } @inproceedings{LeberMartinezMadrid2018, author = {Leber, Isabel and Mart{\´i}nez Madrid, Natividad}, title = {WearIT - a rapid prototyping platform for wearables}, series = {Bioinformatics and biomedical engineering: 6th International Work-Conference, IWBBIO 2018, Granada, Spain, April 25-27, 2018, proceedings. - Part II. - (Lecture notes in computer science ; 10814)}, booktitle = {Bioinformatics and biomedical engineering: 6th International Work-Conference, IWBBIO 2018, Granada, Spain, April 25-27, 2018, proceedings. - Part II. - (Lecture notes in computer science ; 10814)}, editor = {Rojas, Ignacio}, publisher = {Springer}, address = {Cham}, isbn = {978-3-319-78759-6}, doi = {10.1007/978-3-319-78759-6_31}, pages = {335 -- 346}, year = {2018}, abstract = {Rapid prototyping platforms reduce development time by allowing quick prototyping of a prototype idea and achieve more time for actual application development with user interfaces. This approach has long been followed in technical platforms, such as the Arduino. To transfer this form of prototyping to wearables, WearIT is presented in this paper.WearIT consists of four components as a wearable prototyping platform: (1) a vest, (2) sensor and actuator shields, (3) its own library and (4) a motherboard consisting of Arduino, Raspberry Pi, a board and a GPS module. As a result, a wearable prototype can be quickly developed by attaching sensor and actuator shields to the WearIT vest. These sensor and actuator shields can then be programmed through the WearIT library. Via Virtual Network Computing (VNC) with a remote computer, the screen contents of the Raspberry Pi can be accessed and the Arduino be programmed.}, language = {en} } @inproceedings{LeberMerkTulliusetal.2018, author = {Leber, Isabel and Merk, Matthias and Tullius, Gabriela and Hertkorn, Peter}, title = {Using pico projectors with spatial contextual awareness to create augmented knowledge spaces for interdisciplinary engineering teams}, series = {25th IEEE Conference on Virtual Reality and 3D User Interfaces : Reutlingen, Germany, 18-22 March 2018 : proceedings}, booktitle = {25th IEEE Conference on Virtual Reality and 3D User Interfaces : Reutlingen, Germany, 18-22 March 2018 : proceedings}, editor = {Kiyokawa, Kiyoshi}, publisher = {IEEE}, address = {Piscataway, NJ}, isbn = {978-1-5386-3365-6}, doi = {10.1109/VR.2018.8446184}, pages = {2}, year = {2018}, abstract = {Engineers of the research project "Digital Product Life-Cycle" are using a graph-based design language to model all aspects of the product they are working on. This abstract model is the base for all further investigations, developments and implementations. In particular at early stages of development, collaborative decision making is very important. We propose a semantic augmented knowledge space by means of mixed reality technology, to support engineering teams. Therefore we present an interaction prototype consisting of a pico projector and a camera. In our usage scenario engineers are augmenting different artefacts in a virtual working environment. The concept of our prototype contains both an interaction and a technical concept. To realise implicit and natural interactions, we conducted two prototype tests: (1) A test with a low-fidelity prototype and (2) a test by using the method Wizard of Oz. As a result, we present a prototype with interaction selection using augmentation spotlighting and an interaction zoom as a semantic zoom.}, language = {en} }