@inbook{9551,
  abstract     = {{Friction occurs in the contact between tyre and road. The friction of rubber material on dry surfaces is dominated by hysteresis and adhesion effects. Hysterisis friction is characterised by the energy dissipation within the visco-elastic material, which is caused by its deformation while passing the surface roughness. Hysteresis effects are modelled by an extended linear visco-elastic material with several Maxwell elements. The development of a model in the time domain allows to consider nonlinear effects. Additionally temperature effects are taken into account based on the WLF-transformation. Adhesion forces originate from molecular bindings between the contact partners. This effect is simulated by applying a modified model of Achenbach on real surfaces. The temperature distribution within the friction contact region is investigated experimentally as well. Furthermore global stick-slip vibrations of a rubber block element are investigated using a global contact model. Numerical results are compared with experiments performed on a tribometer test rig.}},
  author       = {{Sextro, Walter and Moldenhauer, Patrick and Wangenheim, M and Lindner, Markus and Kröger, Matthias}},
  booktitle    = {{Analysis and Simulation of Contact Problems}},
  editor       = {{Wriggers, Peter and Nackenhorst, Udo}},
  isbn         = {{978-3-540-31760-9}},
  pages        = {{243--252}},
  publisher    = {{Springer Berlin Heidelberg}},
  title        = {{{Contact behaviour of a sliding rubber element}}},
  doi          = {{10.1007/3-540-31761-9_27}},
  volume       = {{27}},
  year         = {{2006}},
}

@inproceedings{9552,
  author       = {{Twiefel, Jens and Hemsel, Tobias and Kauczor, Christopher}},
  booktitle    = {{Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators}},
  number       = {{Band 180}},
  pages        = {{207--212}},
  title        = {{{Energy harvesting with piezoelectric Elements}}},
  year         = {{2006}},
}

@proceedings{9553,
  abstract     = {{In the design process of energy harvesting systems based on piezoelectric elements, achievable energy output is the most interesting factor. To estimate this amount a priori manufacturing of prototypes a mathematical model is very helpful. Within this contribution we will introduce a model based on electro-mechanical circuit theory. Its parameters are identified by measurements and the model is validated by comparison to experimental results. The model is designed to support the development-engineer in the dimensioning of energy harvesting units to specific application demands. Two main challenges in device design are investigated with the mathematical model: influence of the ambient excitation frequency, and influence of the load impedance. Typically, the equivalent model approach delivers models for piezoelectric elements that are driven in resonance by electrical excitation. In the case of energy harvesting the piezoelectric elements are excited mechanically and most often non-resonant. Thus, we first set up a mechanical equivalent model for base excited systems. In first approximation it represents an energy harvesting unit around one resonance frequency. The model is expandable for a wider frequency range using the superpositioning of multiple circuits. From the viewpoint of optimum energy transformation between mechanical and electrical energy it is favorable to drive piezoelectric elements at resonance or anti-resonance. Thus, an energy harvesting system should be tuned to the excitation frequency.}},
  editor       = {{Twiefel, Jens and Richter, Björn and Hemsel, Tobias and Wallaschek, Jörg}},
  pages        = {{616909--616909--10}},
  title        = {{{Model-based design of piezoelectric energy harvesting systems}}},
  doi          = {{10.1117/12.658623}},
  volume       = {{6169}},
  year         = {{2006}},
}

@inproceedings{9558,
  author       = {{Wilmanns, S and Nakamura, K and Mracek, Maik and Hemsel, Tobias}},
  booktitle    = {{Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators}},
  pages        = {{205}},
  title        = {{{Non-resonant piezoelectric motors driven in audible frequency range}}},
  volume       = {{Band 180}},
  year         = {{2006}},
}

@inproceedings{9559,
  author       = {{Zhou, W and Fu, Bo and Hemsel, Tobias and Wallaschek, Jörg}},
  booktitle    = {{Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators}},
  pages        = {{213}},
  title        = {{{Piezoelectrics in dental tools}}},
  volume       = {{Band 180}},
  year         = {{2006}},
}

@proceedings{7780,
  editor       = {{Pleuß, Andreas and Van den Bergh, Jan and Hußmann, Heinrich and Sauer, Stefan and Bödcher, Alexander}},
  publisher    = {{CEUR-WS.org}},
  title        = {{{Proceedings of the Workshop on Model Driven Development of Advanced User Interfaces, satellite of the MoDELS 2006 conference}}},
  volume       = {{214}},
  year         = {{2006}},
}

@inproceedings{7947,
  author       = {{Loeser, Christoph and Schomaker, Gunnar and Schubert, Matthias and Schattkowsky, Tim}},
  booktitle    = {{Proceedings of the 5th International Conference on Networking (ICN 2006), Morne (Mauritius)}},
  pages        = {{105}},
  publisher    = {{IEEE Computer Society}},
  title        = {{{Fairness Considerations in Replication and Placement Strategies for large Documents in heterogeneous Content Delivery Networks}}},
  doi          = {{http://dx.doi.org/10.1109/ICNICONSMCL.2006.96}},
  year         = {{2006}},
}

@inproceedings{7948,
  author       = {{Schattkowsky, Tim and Förster, Alexander and Loeser, Christoph}},
  booktitle    = {{Proceedings of the 5th International Conference on Networking (ICN 2006), Morne (Mauritius)}},
  pages        = {{86}},
  publisher    = {{IEEE Computer Society}},
  title        = {{{Secure Storage for Physically Exposed Web- and Application Servers}}},
  year         = {{2006}},
}

@inproceedings{7949,
  author       = {{Schattkowsky, Tim and Hendrik Hausmann, Jan and Engels, Gregor}},
  booktitle    = {{Proceedings of the International Conference on Model Driven Engineering Languages and Systems (MoDELS 2006), Genova (Italy)}},
  pages        = {{737--752}},
  publisher    = {{Springer}},
  title        = {{{Using UML Activities for System-on-Chip Design and Synthesis}}},
  doi          = {{dx.doi.org/10.1007/11880240_51}},
  volume       = {{4199/2006}},
  year         = {{2006}},
}

@inproceedings{7950,
  author       = {{Pleuß, Andreas and Van den Bergh, Jan and Sauer, Stefan and Hußmann, Heinrich}},
  booktitle    = {{Satellite Events at the MoDELS 2005 Conference, MoDELS 2005 International Workshops, Doctoral Symposium, Educators Symposium, Revised Selected Papers, Montego Bay (Jamaica)}},
  pages        = {{182--190}},
  publisher    = {{Springer}},
  title        = {{{Workshop Report: Model Driven Development of Advanced User Interfaces (MDDAUI)}}},
  doi          = {{dx.doi.org/10.1007/11663430_19}},
  volume       = {{3844}},
  year         = {{2006}},
}

@inproceedings{7951,
  author       = {{Ehrig, Karsten and Taentzer, Gabriele and Küster, Jochen and Winkelmann, Jessica}},
  booktitle    = {{Proceedings of the conference on Formal Methods for Open Object-Based Distributed Systems (FMOODS 2006), Bologna (Italy)}},
  pages        = {{156--170}},
  publisher    = {{Springer}},
  title        = {{{Generating Instance Models from Meta Models}}},
  doi          = {{dx.doi.org/10.1007/11768869_13}},
  volume       = {{4037/2006}},
  year         = {{2006}},
}

@inproceedings{7952,
  author       = {{Hauser, Rainer and Friess, Michael and Küster, Jochen and Vanhatalo, Jussi}},
  booktitle    = {{Proceedings of the 10th IEEE International Enterprise Distributed Object Computing Conference (EDOC 2006)}},
  pages        = {{129--140}},
  publisher    = {{IEEE Computer Society}},
  title        = {{{Combining Analysis of Unstructured Workflows with Transformation to Structured Workflows}}},
  doi          = {{http://dx.doi.org/10.1109/EDOC.2006.21}},
  year         = {{2006}},
}

@inproceedings{7953,
  abstract     = {{As the Unified Modeling Language (UML) has by now seen widespread and successful use in the software industry and academia alike, it has also found its way into many computer science curricula. An outstanding advantage of teaching UML is that it enables an illustration of many crucial concepts of software engineering, far beyond its concrete notation. Most important among these concepts is that of abstraction. We present a course design which demonstrates the use of UML as a vehicle for teaching such core concepts of software engineering. Multimedia elements and tools help to efficiently convey the courses message to the students.}},
  author       = {{Engels, Gregor and Hendrik Hausmann, Jan and Lohmann, Marc and Sauer, Stefan}},
  booktitle    = {{Proceedings of the Satellite Events at the MoDELS 2005 Conference, Montego Bay (Jamaica)}},
  pages        = {{306--319}},
  publisher    = {{Springer}},
  title        = {{{Teaching UML Is Teaching Software Engineering Is Teaching Abstraction}}},
  volume       = {{3844 / 2006}},
  year         = {{2006}},
}

@inproceedings{7954,
  abstract     = {{The model-driven development (MDD) approach for constructing software systems advocates a stepwise refinement and transformation process starting from high-level models to concrete program code. In contrast to numerous research efforts that try to generate executable function code from models, we propose a novel approach termed model-driven monitoring. Here, models are used to specify minimal requirements and are transformed into assertions on the code level for monitoring hand-coded programs during execution. We show how well-understood results from the graph transformation community can be deployed to support this model-driven monitoring approach. In particular, models in the form of visual contracts are defined by graph transitions with loose semantics, while the automatic transformation from models to JML assertions on the code level is defined by strict graph transformation rules. Both aspects are supported and realized by a dedicated Eclipse plug-in.}},
  author       = {{Engels, Gregor and Lohmann, Marc and Sauer, Stefan and Heckel, Reiko}},
  booktitle    = {{Proceedings of the 3rd International Conference on Graph Transformation (ICGT 2006), Natal (Brazil)}},
  pages        = {{336--350}},
  publisher    = {{Springer}},
  title        = {{{Model-Driven Monitoring: An Application of Graph Transformation for Design by Contract}}},
  doi          = {{http://dx.doi.org/10.1007/11841883}},
  volume       = {{4178}},
  year         = {{2006}},
}

@inproceedings{7955,
  author       = {{Förster, Alexander and Schattkowsky, Tim and Engels, Gregor and Van Der Straeten, Ragnhild}},
  booktitle    = {{IEEE Symposium on Visual Languages and Human-Centric Computing (VL/HCC 2006), Brighton (UK)}},
  pages        = {{135--142}},
  publisher    = {{IEEE Computer Society}},
  title        = {{{A Pattern-driven Development Process for Quality Standard-conforming Business Process Models}}},
  year         = {{2006}},
}

@inproceedings{7956,
  abstract     = {{The Visual Contract Workbench is a tool that supports model-driven development of software systems by lifting the Design by Contract idea, which is usually used at the code level, to the model level. It uses visual contracts for graphically specifying the pre- and post-conditions of an operation. Java classes with JML (Java Modeling Language) assertions are generated from visual contracts to facilitate automatic monitoring of the correctness of the programmer's implementation.}},
  author       = {{Lohmann, Marc and Engels, Gregor and Sauer, Stefan}},
  booktitle    = {{Proceedings of the 21st IEEE International Conference on Automated Software Engineering (ASE 06), Tokyo (Japan)}},
  pages        = {{355--356}},
  publisher    = {{IEEE Computer Society}},
  title        = {{{Model-driven Monitoring: Generating Assertions from Visual Contracts}}},
  doi          = {{http://doi.ieeecomputersociety.org/10.1109/ASE.2006.52}},
  year         = {{2006}},
}

@inproceedings{7957,
  abstract     = {{Serviceorientierte Architekturen (SOA) erlauben eine schnelle und kosteneffiziente Bereitstellung unterschiedlicher Funktionalitäten zur Unterstützung der Geschäftsprozesse eines Unternehmens. Dazu werden fachliche Funktionalitäten in Form von Enterprise Services zur Verfügung gestellt. Die hohe Zahl von Enterprise Services erfordert eine geeignete semantische Beschreibung zu deren effizienten Verwaltung. Zur semantischen Beschreibung von Enterprise Services sowie zur Formulierung von Suchanfragen ist an der Universität Paderborn die Methode der visuellen Kontrakte entwickelt worden. Das Papier stellt die Ergebnisse der ersten Phase einer umfangreichen industriellen Fallstudie zur Evaluation der praktischen Anwendbarkeit visueller Kontrakte im Kontext einer SOA vor.}},
  author       = {{Engels, Gregor and Güldali, Baris and Juwig, Oliver and Lohmann, Marc and Richter, Jan-Peter}},
  booktitle    = {{Proceedings of the conference on Software Enginneering, Fachtagung des GI Fachbereichs Softwaretechnik (SE 2006), Leipzig (Germany)}},
  pages        = {{111--122}},
  publisher    = {{Gesellschaft für Informatik (GI)}},
  title        = {{{Industrielle Fallstudie: Einsatz visueller Kontrakte in serviceorientierten Architekturen}}},
  doi          = {{http://dx.doi.org/10.1007/11841883}},
  volume       = {{79}},
  year         = {{2006}},
}

@techreport{8215,
  author       = {{Lohmann, Marc and Richter, Jan-Peter and Engels, Gregor and Güldali, Baris and Juwig, Oliver and Sauer, Stefan}},
  publisher    = {{University of Paderborn, s-lab}},
  title        = {{{Semantische Beschreibung von Enterprise Services – Eine industrielle Fallstudie}}},
  year         = {{2006}},
}

@article{8306,
  author       = {{Kissel, J. and Krauter, Stefan}},
  journal      = {{Energy Policy}},
  number       = {{16}},
  pages        = {{3591--3598}},
  title        = {{{Adaptations of Renewable Energy Policies to unstable macroeconomic situations – Case study: Wind power in Brazil}}},
  volume       = {{34}},
  year         = {{2006}},
}

@inproceedings{8307,
  author       = {{Krauter, Stefan and Grunow, Paul}},
  booktitle    = {{Proceedings of the 4th World Conference on Photovoltaic Energy Conversion (Joint congress of IEEE/PVSEC/EUPVC), Waikoloa, Hawaii (USA), 8.–12. Mai 2006, S. 2133–2137}},
  title        = {{{Optical modelling and simulation of PV module encapsulation to improve structure and material properties for maximum energy yield}}},
  year         = {{2006}},
}