Refine
Year of publication
- 2017 (302) (remove)
Document Type
- Conference proceeding (122)
- Journal article (104)
- Book chapter (32)
- Book (28)
- Patent / Standard / Guidelines (6)
- Working Paper (5)
- Doctoral Thesis (2)
- Anthology (1)
- Issue of a journal (1)
- Review (1)
Is part of the Bibliography
- yes (302)
Institute
- ESB Business School (96)
- Informatik (88)
- Technik (58)
- Texoversum (33)
- Life Sciences (26)
Publisher
- Springer (44)
- Hochschule Reutlingen (29)
- IEEE (27)
- Elsevier (18)
- Gesellschaft für Informatik (16)
- ACM (8)
- Universitätsbibliothek Tübingen (8)
- Shaker (7)
- Springer Gabler (7)
- Association for Information Systems (AIS) (5)
- VDE Verlag (5)
- Università Politecnica delle Marche (4)
- Wiley (4)
- Technische Universität Berlin (3)
- Thexis Verlag (3)
- American Marketing Assoc. (2)
- Deutsche Gesellschaft für Computer- und Roboterassistierte Chirurgie e. V. (2)
- Duncker & Humblot (2)
- EACH USP (2)
- Hanser (2)
- IOP (2)
- IOS Press (2)
- Koordinierungsstelle (2)
- Lange (2)
- MIM, Marken-Institut München (2)
- New-Business-Verl. (2)
- Routledge (2)
- Schäffer-Poeschel (2)
- System Dynamics Society (2)
- The Association for Computing Machinery, Inc. (2)
- The Kelley School of Business, Indiana University (2)
- VDE Verlag GmbH (2)
- Verband Deutscher Werkzeug- und Formenbauer (2)
- American Chemical Society (1)
- American Marketing Association (1)
- Amsterdam Fashion Institute (1)
- Auto & Design (1)
- BMBF (1)
- Beltz Juventa (1)
- British Institute of Non-Destructive Testing (1)
- DAAD – Deutscher Akademischer Austauschdienst (1)
- DIMECC Oy (1)
- DITF (1)
- De Gruyter (1)
- De Gruyter Oldenbourg (1)
- Deutsches Textilforschungszentrum Nord-West (1)
- Development and Entrepreneurship Agency (1)
- EMW (1)
- Emerald (1)
- FPRC (1)
- Franzis-Verl. (1)
- Hampp (1)
- Hanser ; GBI Genios (1)
- Harvard Business School (1)
- Harvard Business School Publ. (1)
- Haufe Group (1)
- IBP, Internat. Business Press Publ. (1)
- INFORMS (1)
- IOP Publ. (1)
- Inderscience Publ. (1)
- Konrad-Adenauer-Stiftung (1)
- Koordinierungsstelle Forschung und Entwicklung der Fachhochschulen des Landes Baden-Württemberg (1)
- Lemmens (1)
- MDPI (1)
- MHP. a Porsche Company (1)
- MIT Center for Information Systems Research (1)
- Macmillan Publishers Limited (1)
- Nature Publishing Group (1)
- Newcastle University (1)
- PLOS (1)
- Pearson (1)
- PeerJ Ltd. (1)
- Public Verl.-Ges. und Anzeigenagentur (1)
- RSC (1)
- RSC Publ. (1)
- RWTH (1)
- Royal Society of Chemistry (1)
- SPIE (1)
- Science and Technology Publications, Lda (1)
- Springer Vieweg (1)
- The Royal Society of Chemistry (1)
- UVK Verlagsgesellschaft (1)
- UVK Verlagsgesellschaft mbH (1)
- University of Konstanz, University Library (1)
- Universität Trier (1)
- Verl. Werben-&-Verkaufen (1)
- Verl.-Gruppe Handelsblatt (1)
- Verlag Moderne Industrie (1)
- Verlag W. Kohlhammer (1)
- WIP (1)
- Wiley Interscience (1)
- Wiley-Blackwell (1)
- Wissenschaftliche Verlagsgesellschaft (1)
- Wydawnictwo Uniwersytetu Jagiellońskiego (1)
- libreriauniversitaria.it.edizioni (1)
- pVS - pro Verlag und Service GmbH & Co. KG (1)
- wbv (1)
Diese Arbeit liefert einen Konzeptentwurf, der die Integration verschiedener Systeme mit prozessrelevanten klinischen Diensten gewährleistet. Chirurgische Abläufe 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 Möglichkeit, diese in einer Workflow-Engine automatisiert auszuführen. 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 über SOAP-Nachrichten (Simple Object Access Protocol) mit den entsprechenden Systemen. Dieser Ansatz wurde mithilfe eines Prototyps validiert und umgesetzt.
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.
Nowadays CHP units are discussed for the production of electricity on demand rather than for generation of heat providing electricity as a by-product. By this means, CHP units are capable of satisfying a higher share of the electricity demand on-site and in this new role, CHP units are able to reduce the load on the power grid and to compensate for high fluctuations of solar and wind power.
Evidently, a novel control strategy for CHP units is required in order to shift the operation oriented at the heat demand to an operation led by the electricity demand. Nevertheless, the heat generated by the CHP unit needs to be utilized completely in any case, for maintaining energy as well as economic efficiency. Such a strategy has been developed at Reutlingen University, and it will be presented in the paper. Part of the strategy is an intelligent management for the thermal energy storage (TES) ensuring that the storage is at low level in terms of its heat content just before an electricity demand is calling the CHP unit into operation. Moreover, a proper forecast of both, heat and electricity demand, is incorporated and the requirements of the CHP unit in terms of maintenance and lifetime are considered by limiting the number of starts and stops per unit time and by maintaining a certain minimum length of the operation intervals.
All aspects of this novel control strategy are revealed in the paper, which has been implemented on a controller for further testing at two sites in the field. Results from these tests are given as well as results from a simulation model, which is able to evaluate the performance of the control strategy for an entire year.
This article covers the design of highly integrated gate drivers and level shifters for high-speed, high power efficiency and dv/dt robustness with focus on automotive applications. With the introduction of the 48 V board net in addition to the conventional 12 V battery, there is an increasing need for fast switching integrated gate drivers in the voltage range of 50 V and above. State-of-the-art drivers are able to switch 50 V in less than 5 ns. The high-voltage electrical drive train demands for galvanic isolated and highly integrated gate drivers. A gate driver with bidirectional signal transmission with a 1 MBit/s amplitude modulation, 10/20 MHz frequency modulation and power transfer over one single transformer will be discussed. The concept of high-voltage charge storing enables an area-efficient fully integrated bootstrapping supply with 70 % less area consumption. EMC is a major concern in automotive. Gate drivers with slope control optimize EMC while maintaining good switching efficiency. A current mode gate driver, which can change its drive current within 10 ns, results in 20 dBuV lower emissions between 7 and 60 MHz and 52 % lower switching loss compared to a conventional constant current gate driver.
Though bioprinting is a forward-looking approach in bone tissue engineering, the development of bioinks which are on the one hand processable with the chosen printing technique, and on the other hand possess the relevant mechanical as well as osteoconductive features remains a challenge. In the present study, polymer solutions based on methacrylated gelatin and methacrylated hyaluronic acid modified with hydroxyapatite (HAp) particles (5 wt%) were prepared. Encapsulation of primary human adipose derived stem cells in the HAp-containing gels and culture for 28 d resulted in a storage moduli significantly increased to 126% ± 9.6% compared to the value on day 1 by the sole influence of the HAp. Additional use of osteogenic media components resulted in an increase of storage module up to 199% ± 27.8%. Similarly, the loss moduli was increased to 370% ± 122.1% under the influence of osteogenic media components and HAp. Those changes in rheological material characteristics indicate a distinct change in elastic and viscous hydrogel properties, and are attributed to extensive matrix production in the hydrogels by the encapsulated cells, what could also be proven by staining of bone matrix components like collagen I, fibronectin, alkaline phosphatase and osteopontin. When using the cell-laden polymer solutions as bioinks to build up relevant geometries, the ink showed excellent printability and the printed grid structure's integrity remained intact over a culture time of 28 d. Again, an intense matrix formation as well as upregulation of osteogenic markers by the encapsulated cells could be shown. In conclusion, we demonstrated that our HAp-containing bioinks and hydrogels on basis of methacrylated gelatin and hyaluronic acid are on the one hand highly suitable for the build up of relevant three-dimensional geometries with microextrusion bioprinting, and on the other hand exhibit a significant positive effect on bone matrix development and remodeling in the hydrogels, as indicated by rheological measurements and staining of bone components. This makes the developed composite hydrogels an excellent material for bone bioprinting approaches.
Sesam öffne Dich
(2017)
Aus ähnlichen Beweggründen, die Ferdinand von Steinbeis im Großen verfolgte, ist es den Bemühungen des Textilfachlehrers Reichelt und dem damaligen Prof. Stängle zu verdanken, dass gegen Ende des 19. Jahrhunderts an der in der Zwischenzeit zum Technikum für Textilindustrie avancierten Reutlinger Textilanstalt eine reichhaltige Sammlung von Modellen und Gewebemustern eingerichtet und aufgebaut wurde. Den Schwerpunkt der aus über 500000 Mustern und Gewebefragmenten bestehenden Kollektion bilden europäische Jacquard-Gewebe und engliche Anzugsstoffe aus dem 19. Jahrhundert. Das Glanzstück der Reutlinger Gewebesammlung bilden ... etwa 900 altjapanische Gewebefragmente aus der Zeit von 1530 bis 1880 ...
A novel configuration of the dual active bridge (DAB) DC/DC converter is presented, enabling more efficient wide voltage range conversion at light loads. A third phase leg as well as a center tapped transformer are introduced to one side of the converter. This concept provides two different turn ratios, thus extending the zero voltage switching operation resulting in higher efficiency. A laboratory prototype was built converting an input voltage of 40V to an output voltage in the range of 350V to 650V. Measurements show a significant increase up to 20% in the efficiency for light-load operation.
This paper presents a control strategy for optimal utilization of photovoltaic (PV) generated power in conjunction with an Energy Storage System (ESS). The ESS is specifically designed to be retrofitted into existing PV systems in an end-user application. It can be attached in parallel to the PV system and connects to existing DC/AC inverters. In particular, the study covers the impact such a modification has on the output power of existing PV panels. A distinct degradation of PV output power was found due to the different power characteristics of PV panel and ESS. To overcome such degradation a novel feedback system is proposed. The feedback system continuously modifies the power characteristic of the ESS to match the PV panel and thus achieves optimal power utilization. Impact on PV and power point tracking performance is analyzed. Simulation of the proposed system is performed in MATLAB/Simulink. The results are found to be satisfactory.
How to protect the skin from getting sun burnt? The sun can damage your skin e.g. skin cancer. But the sun has a positive effect to the human. The time in sun and the intensity are key values between enjoy the sunbath and having a negative effect to the skin. A smart device like a UV flower could help you to enjoy the sunbath. It measures the UV index around you and gives this information to a smartphone app. The development steps of such a device are described in this paper. The UV flower is made of textile fabrics.
Trotz der oft schwierigen Rahmenbedingungen auf den Märkten Subsahara Afrikas ist es möglich, ein erfolgreiches Geschäft aufzubauen, sofern man die adäquate Markteintrittsform wählt und darüber hinaus bereit ist, das eigene Geschäftsmodell an die lokalen Gegebenheiten anzupassen. Eine Herausforderung ist die politische, wirtschaftliche und kulturelle Heterogenität in Subsahara Afrika, die es unmöglich macht, den Kontinent als einen Markt zu bearbeiten. Allerdings gibt es seit Jahrzehnten regionale Integrationsabkommen, die jedoch erst in den letzten Jahren wiederbelebt und vorangetrieben wurden, wie z. B. die ECOWAS (Economic Community of West African States), die EAC (East African Community) und die SADC (South African Development Corporation). Inzwischen funktionieren diese Initiativen soweit, dass einige ausländische Unternehmen beginnen, Teile des Geschäftes regional und nicht mehr national zu organisieren, also die Länder als gemeinsamen Markt zu bearbeiten. In der Regel sind die kulturellen Unterschiede in Nachbarländern nicht so groß. Aus diesen Gründen besteht Wachstumspotential für geschäftlich interessante Märkte in Subsahara Afrika.