@book{7304, editor = {{Kremer, H.-Hugo and Sloane, Peter F. E.}}, title = {{{Paderborner Forschungs- und Entwicklungswerkstatt - Forschungsfragen und -konzepte der beruflichen Bildung}}}, volume = {{1}}, year = {{2007}}, } @book{7305, editor = {{Kremer, H.-Hugo}}, title = {{{Lernen in medienbasierten kooperativen Lernumgebungen - Modellversuch KooL}}}, year = {{2007}}, } @article{7306, author = {{Kremer, H.-Hugo and Tramm, T.}}, journal = {{bwp@ Berufs- und Wirtschaftspädagogik - online}}, number = {{12}}, title = {{{Qualifizierung von Berufs- und Wirtschaftspädagogen zwischen Professionalisierung und Polyvalenz}}}, year = {{2007}}, } @article{7361, author = {{Burda, A. and Kremer, H.-Hugo and Pferdt, F. G.}}, journal = {{Zeitschrift für Hochschulentwicklung}}, number = {{4}}, title = {{{Mentoring-Modell Paderborn - Konzept und erste Erfahrungen}}}, volume = {{2}}, year = {{2007}}, } @inbook{7362, author = {{Kremer, H.-Hugo}}, booktitle = {{Lernen in medienbasierten kooperativen Lernumgebungen - Modellversuch KooL}}, editor = {{Kremer, H.-Hugo}}, pages = {{25--46}}, title = {{{Selbstgesteuertes Lernen in medienbasierten kooperativen Lernumgebungen}}}, year = {{2007}}, } @inbook{7363, author = {{Kremer, H.-Hugo}}, booktitle = {{Lernen in medienbasierten kooperativen Lernumgebungen - Modellversuch KooL}}, editor = {{Kremer, H.-Hugo}}, pages = {{95--117}}, title = {{{Kooperative Lernaufgaben als Instrumente der Curriculumentwicklung}}}, year = {{2007}}, } @article{7374, author = {{Heckel, Reiko and Cherchago, Alexey}}, journal = {{Logic and Algebraic Programming}}, number = {{1}}, pages = {{15--33}}, title = {{{Structural and Behavioural Compatibility of Graphical Service Specifications}}}, volume = {{70}}, year = {{2007}}, } @article{7375, author = {{Bals, Jan-Christopher and Christ, Fabian and Engels, Gregor and Sauer, Stefan}}, journal = {{Forschungsforum Paderborn}}, pages = {{56--60}}, title = {{{Software-Qualität - überall! - Excel-lente Software}}}, volume = {{10}}, year = {{2007}}, } @inbook{7551, abstract = {{Service-oriented computing is distinguished by its use of dynamic discovery and binding for the integration of services at runtime. This poses a challenge for testing, in particular, of the interaction between services. We propose a model-driven solution to address this challenge. Service descriptions are promoted from largely syntactical to behavioural specifications of services in terms of contracts (pre-conditions and effects of operations), expressed in a visual UML-like notion. Through mappings to semantic web languages and the Java Modeling Language (JML) contracts support the automatic discovery of services as well as the derivation of test cases and their execution and monitoring. We discuss an extended life cycle model for services based on the model-driven approach and illustrate its application using a model of a hotel reservation service.}}, author = {{Lohmann, Marc and Mariani, Leonardo and Heckel, Reiko}}, booktitle = {{Test and Analysis of Web Services}}, editor = {{Baresi, E. Di Nitto, L.}}, pages = {{173--204}}, publisher = {{Springer}}, title = {{{A Model-Driven Approach to Discovery, Testing and Monitoring of Web Services}}}, year = {{2007}}, } @phdthesis{7579, abstract = {{Today, mobility is one of the most important market and technology trend within information and communication technology. As the demand for rapid deployment of dependable mobile applications increases, middleware for mobile systems is emerging as one of the most active areas of system research in mobility. The middleware is a set of distributed software services that exists between distributed operating systems and mobile applications. The key to the middleware is to provide support across the mobile application domains, help application developers overcome the complexity and problems brought by mobility, and enhance dependability and usability of developed mobile applications. The criticality and pervasiveness of middleware for mobile systems is continually growing. However, the design and development of the middleware are difficult tasks, and it is not easy to ensure the quality of a developed middleware. This is mainly caused by the increasing complexity of the middleware. In addition, the great diversity of this area makes it very difficult for the designers to reuse the already established design knowledge or successful experience when building new systems. All these make the design process quite inefficient and unpredictable, and therefore risking the project. “One man’s magic is another man’s engineering”. Engineering design is much more routine than innovative. Founding on this fundamental notion in software engineering, we develop an architectural style-based approach to deal with the problems in the thesis. We build architectural styles for a class of related middleware. The style represents a common form of design, which originates from the results that practitioners have achieved in one area. The style is formulated to repeat successes and avoid failures from previous projects. When building a new middleware, the designers and developers do not need to explore all possible alternatives for its supported architecture. Instead, they can use the architectural style that is effective for the middleware. They can define the design as instances of the style, or they can use the style as a reference model for further improvement and development. By structuring the design space for a family of related middleware, the style can drastically simplify the process of building a middleware, reduce costs of implementation through reusable infrastructure, and improve system integrity through style-specific analysis and checks. We develop the approach based on UML-like meta modeling and graph transformation techniques to support sound methodological principles, powerful modeling, formal analysis and refinement. The approach consists of several main parts: the modeling language that supports specification of the style and mobility, the refinement formalization that ensures that an abstract style is correctly refined to a concrete one, as well as the consistency check framework that validates behavioral consistency between two styles on different abstract layers. With the Fujaba simulation tool support, we also develop a style-based engineering process that helps us to efficiently develop correct and consistent styles. Besides, it allows a seamless integration of our approach into the well-known object oriented design. By providing a concrete example of how to construct the style for a class of related middleware, and how to use the style to help the design and development of a new middleware, we show that the architectural style-based approach is useful and practical.}}, author = {{Guo, Ping}}, title = {{{Architectural Style-based Modeling and Simulation of Middleware for Mobile Systems}}}, year = {{2007}}, } @article{7597, author = {{Tönnies, Merle}}, journal = {{Spatial Practices 2}}, pages = {{305--324}}, publisher = {{Rodopi}}, title = {{{Constructing an Emblematic Northern Space. The New Brighton Photographs of Martin Parr and Tom Wood}}}, year = {{2007}}, } @article{7641, author = {{Marquardt, Bastian and Russ, Marco and Lorke, Axel and Meier, Cedrik and Reuter, Dirk and Wieck, Andreas D.}}, issn = {{1386-9477}}, journal = {{Physica E: Low-dimensional Systems and Nanostructures}}, number = {{6}}, pages = {{2075--2077}}, publisher = {{Elsevier BV}}, title = {{{Quantum dots as tunable scatterers for 2D- and 1D-electron systems}}}, doi = {{10.1016/j.physe.2007.09.198}}, volume = {{40}}, year = {{2007}}, } @article{7643, author = {{Meier, Cedrik and Gondorf, Andreas and Lüttjohann, Stephan and Lorke, Axel and Wiggers, Hartmut}}, issn = {{0021-8979}}, journal = {{Journal of Applied Physics}}, number = {{10}}, publisher = {{AIP Publishing}}, title = {{{Silicon nanoparticles: Absorption, emission, and the nature of the electronic bandgap}}}, doi = {{10.1063/1.2720095}}, volume = {{101}}, year = {{2007}}, } @article{7644, author = {{Meier, Cedrik and Hennessy, Kevin}}, issn = {{0003-6951}}, journal = {{Applied Physics Letters}}, number = {{14}}, publisher = {{AIP Publishing}}, title = {{{Technique for tilting GaAs photonic crystal nanocavities out of plane}}}, doi = {{10.1063/1.2719612}}, volume = {{90}}, year = {{2007}}, } @article{7645, author = {{Lüttjohann, S and Meier, Cedrik and Offer, M and Lorke, A and Wiggers, H}}, issn = {{0295-5075}}, journal = {{Europhysics Letters (EPL)}}, number = {{3}}, publisher = {{IOP Publishing}}, title = {{{Temperature-induced crossover between bright and dark exciton emission in silicon nanoparticles}}}, doi = {{10.1209/0295-5075/79/37002}}, volume = {{79}}, year = {{2007}}, } @inproceedings{835, author = {{Valentin, Stefan and Karl, Holger}}, booktitle = {{IEEE Wireless Communications and Networking Conference, WCNC 2007, Hong Kong, China, 11-15 March, 2007}}, pages = {{896----901}}, title = {{{Effect of User Mobility in Coded Cooperative Systems with Joint Partner and Cooperation Level Selection}}}, doi = {{10.1109/WCNC.2007.170}}, year = {{2007}}, } @inproceedings{836, author = {{Marie Feeney, Laura and Cetin, Bilge and Hollos, Daniel and Kubisch, Martin and Mengesha, Seble and Karl, Holger}}, booktitle = {{Wired/Wireless Internet Communications, 5th International Conference, WWIC 2007, Coimbra, Portugal, May 23-25, 2007, Proceedings}}, pages = {{201----212}}, title = {{{Multi-rate Relaying for Performance Improvement in IEEE 802.11 WLANs}}}, doi = {{10.1007/978-3-540-72697-5_17}}, year = {{2007}}, } @inproceedings{8413, author = {{Anastasakis, Kyriakos and Bordbar, Behzad and Küster, Jochen}}, booktitle = {{Proceedings of the workshop on Model-Driven Engineering, Verification and Validation (MoDeVVA 2007), Nashville, TN (USA)}}, pages = {{47--56}}, publisher = {{Springer}}, title = {{{Analysis of Model Transformations via Alloy}}}, volume = {{5002}}, year = {{2007}}, } @inproceedings{8414, abstract = {{The Model-Driven Architecture (MDA) 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. On the model level the behavior of an operation is specified with a pair of UML composite structure diagrams (visual contract), a visual notation for pre- and post-conditions. The specified behavior is implemented by a programmer manually. An automatic translation from our visual contracts to JML assertions allows for monitoring the hand-coded programs during their execution. In this paper we present an approach to extend our model-driven monitoring approach to allow for model-driven unit testing. In this approach we utilize the generated JML assertions as test oracles. Further, we present an idea how to generate sufficient test cases from our visual contracts with the help of model-checking techniques.}}, author = {{Engels, Gregor and Güldali, Baris and Lohmann, Marc}}, booktitle = {{Proceedings of the 2006 International Conference on Models in Software Engineering (MoDELS 2006)}}, pages = {{182--192}}, publisher = {{Springer}}, title = {{{Towards Model-Driven Unit Testing}}}, doi = {{http://dx.doi.org/10.1007/978-3-540-69489-2_23}}, volume = {{4364}}, year = {{2007}}, } @inproceedings{8415, author = {{Soltenborn, Christian and Engels, Gregor}}, booktitle = {{Symposium "A Formal Semantics for UML" (satellite event of the MoDELS conference 2006), Genova (Italy)}}, pages = {{329--330}}, publisher = {{Springer}}, title = {{{Analysis of UML Activities with Dynamic Meta Modeling Techniques}}}, doi = {{http://dx.doi.org/10.1007/978-3-540-69489-2_42}}, volume = {{4364}}, year = {{2007}}, }