TY - CONF AU - Schwens, C AU - Kabst, Rüdiger ID - 6381 TI - How Early Internationalizers Learn: Experience from Others and Paradigms of Interpretation ER - TY - JOUR AU - Ulaga, Wolfgang AU - Eggert, Andreas ID - 4864 IS - 1 JF - Journal of marketing TI - Value-based differentiation in business relationships: Gaining and sustaining key supplier status ER - TY - JOUR AU - Ulaga, Wolfgang AU - Eggert, Andreas ID - 4868 IS - 3/4 JF - European Journal of Marketing SN - 0309-0566 TI - Relationship value and relationship quality: Broadening the Nomological Network of Business-to-Business Relationships. VL - 40 ER - TY - JOUR AU - Fahr, Ren{\'e} AU - Sunde, Uwe ID - 4886 IS - 6 JF - Regional Science and Urban Economics TI - Spatial mobility and competition for jobs: Some theory and evidence for Western Germany ER - TY - JOUR AU - Fahr, Rene AU - Sunde, Uwe ID - 4887 IS - 10 JF - Applied Economics TI - Regional dependencies in job creation: an efficiency analysis for Western Germany ER - TY - GEN AU - Fahr, Rene ID - 4921 TI - The wage effects of social norms: evidence of deviations from peers' body-mass in Europe ER - TY - JOUR AU - Heckel, Reiko AU - Lohmann, Marc ID - 7376 IS - 2 JF - International Journal on Software Tools for Technology Transfer (STTT) TI - Model-Driven Development of Reactive Information Systems: From Graph Transformation Rules to JML Contracts VL - 9 ER - TY - JOUR AU - Küster, Jochen ID - 7377 IS - 3 JF - Software and Systems Modeling TI - Definition and Validation of Model Transformations VL - 5 ER - TY - JOUR AU - Eggert, A AU - Ulaga, W AU - Schultz, F ID - 7432 IS - 1 JF - Industrial Marketing Management TI - Value Creation in the Relationship Lifecycle: A Quasi-Longitudinal Analysis VL - 35 ER - TY - CHAP AB - The current situation of ad hoc development of Web applications reminds us of the software development practices of the 1960s, before it was realized that the development of applications required more than programming expertise. This book counteracts this situation by giving a comprehensive, practice-oriented and thorough insight into the new discipline of Web Engineering. The text highlights the need to examine and re-use the body of knowledge found within software engineering. It demonstrates how to use that knowledge within the Web environment, in order to achieve a highly disciplined and methodological means of producing Web-based software, putting emphasize on current practices, experiences and pitfalls. The book demonstrates the distinctions between software engineering and Web engineering, for instance, the shorter lead times that Web engineering has compared to its software counterpart, whilst also demonstrating the rapid prototyping and agile methods of development needed to meet these criteria. The book covers important topics of Web Engineering, including requirements analysis, design, architectures, technologies, test, operation and maintenance; this is complemented by in-depth knowledge about Web project management and process issues as well as important quality aspects of Web applications like usability, performance and security. An overview of Semantic Web concepts points the way to the development of future Web applications. AU - Engels, Gregor AU - Lohmann, Marc AU - Wagner, Annika ED - Kappel, B. Pröll, S. Reich, W. Retschitzegger, G. ID - 7549 T2 - Web Engineering: The Discipline of Systematic Development of Web Applications TI - The Web Application Development Process ER - TY - THES AB - Service oriented architectures promise an easy integration of existing IT systems inside and outside of an organization. Service descriptions and software developers are the pivotal elements when systems are integrated over a service oriented architecture. The integration of a service into a client is based on its public service description. On the service provider side, a software developer develops a service description and implements a service accordingly. Today, a service is implemented mainly manual. Automated code generation techniques are seldom used. On the service requestor side, if a software developer needs a specific functionality he searches for a sufficient service. Thus, the success of service oriented architectures is strongly coupled to the content and usability of service descriptions by software developers. In this thesis we describe how to use contracts on the model level to enable a correct implementation and retrieval of services. In our approach we take the pivotal roles of the software developer and the public service description into account. Especially, we allow for a model-based semantic description, monitoring of the correctness of a service and the comparison of existing service descriptions. Therefore, our approach is based on three important techniques: Visual contracts allow for specifying the semantics of a service. A visual contract consists of a pair of UML composite structure diagrams for the representation of the pre- and post-condition of a service. By using UML composite structure diagrams, we have chosen a graphical notation that is familiar to software developers and easily integrates with today’s model-driven software development processes. By embedding our visual contracts into a software development process we are able to monitor the correctness of a hand-coded implementation. Therefore, we will show how models can be used to generate assertions which monitor the execution of the hand-coded implementation. Herewith, violations of the modeled requirements will be detected at runtime. We call this novel approach model-driven monitoring. Model-driven Matching is a new approach to enable a model-based query of existing services. Therefore, we allow for using visual contracts on the service requestor side to describe a needed service. A matching procedure checks the compatibility of a service description and a service query. AU - Lohmann, Marc ID - 7580 TI - Kontraktbasierte Modellierung, Implementierung und Suche von Komponenten in serviceorientierten Architekturen ER - TY - THES AB - One of the main tasks of modern application integration projects is to allow one business unit (requestor) to use services offered by another business unit (provider). When software systems of business partners are composed, an import interface of the requestor system is connected to an exportinterface of the provider system. Here, the import interface specification containing the requestor's requirements for a needed service has to be matched against the export interface specification describing the provided service. Usually, software engineers carry out matching of interface specifications manually; it makes the design and implementation of composite software expensive and error-prone. Therefore, the demand for instruments that would automate the matching procedure is high. In this thesis, we develop a new technique facilitating integration of software systems. To this end, we solve a problem of how to construct visual and formal interface specifications comprising semantic descriptions. Our method also includes a matching procedure that checks compatibility of such specifications. Interface specifications consist of structural and behavioural compartments. The structural compartment, given by a signature analogous to those appearing in algebraic specifications, defines operation declarations. The behavioural compartment, modelled by a conditional graph transformation system (GTS), contains operation contracts in the form of graph transformation rules. The rules of conditional GTS are equipped with loose semantics to describe operations in the import interface, and with strict semantics to describe those in the export interface. Composition of two compartments leads to an integral interface specification which is represented by the novel concept of parameterized conditional GTS. We develop three kinds of compatibility relations underlying the matching procedure. The intended correspondence between declarations and contracts of the required and provided operations is reflected by structural and behavioural compatibility relations that are established over the corresponding compartments of interface specifications. These two compatibility relations are combined into an integral compatibility relation that links the integral specification of the import interface to the one of the export interface. Furthermore, the constructed relations are equipped with rigorously formulated semantic requirements to compatibility and are justified against them. The introduced mathematical theory is supplemented with a conceptual framework. It is aimed at generating interface specifications that are suitable for automation of the matching process. The framework is based on an industry standard that outlines a uniform way of generating specifications. We use the standard issued by the Open Travel Alliance (OTA) in our example scenario where we develop and match standard-based interface specifications of Web services taken from the travelling business domain. Compatibility of interface specifications is necessary but not sufficient for accurate interactions between systems. The integration process is based on the assumption that these systems are correct. First and foremost, this correctness means that interface specifications representing externally visible parts of systems are consistent with implementations which appear internally in the systems. To check this assumption, we propose a model describing external as well as internal parts of a system. The model, formally represented by a graph transformation module, defines consistency relations between external and internal specifications and allows to validate correctness of systems prior to the integration. The proposed model and the matching procedure developed in the thesis are the key elements of a technology designed to improve the application integration process, making it theoretically well-defined and practically machine-processable. AU - Cherchago, Alexey ID - 7581 TI - Service Specification and Matching Based on Graph Transformation ER - TY - CONF AU - Tönnies, Merle ID - 7598 T2 - Anglistentag 2005 TI - Forms and Functions of Violence in Contemporary Black British Drama ER - TY - JOUR AU - Tönnies, Merle ID - 7599 JF - Spatial Practices 1 TI - Foregrounding Boundary Zones. Martin Parr's Photographic (De-)Constructions of Englishness ER - TY - JOUR AU - Tönnies, Merle ID - 7600 JF - Drama II TI - Percy Mtwa, Mbongeni Ngema and Barney Simon: Woza Albert! (1981) VL - 2 ER - TY - JOUR AU - Tönnies, Merle ID - 7601 JF - Passauer Arbeiten zur Literatur-und Kulturwissenschaft TI - New Labour in the New Millenium. A Further Theatricalisation of Politics? VL - 3 ER - TY - JOUR AU - Tönnies, Merle ID - 7615 JF - Salzburg Studies in English Literature and Culture TI - Radicalising Postmodern Biofictions. British Fictional Autobiography of the Twenty-First Century VL - 3 ER - TY - JOUR AU - Tönnies, Merle ID - 7616 JF - Stauffenburg Handbücher TI - A Midsummer Night's Dream VL - 9 ER - TY - JOUR AU - Regolin, I. AU - Sudfeld, D. AU - Lüttjohann, S. AU - Khorenko, V. AU - Prost, W. AU - Kästner, J. AU - Dumpich, G. AU - Meier, Cedrik AU - Lorke, A. AU - Tegude, F.-J. ID - 7646 JF - Journal of Crystal Growth SN - 0022-0248 TI - Growth and characterisation of GaAs/InGaAs/GaAs nanowhiskers on (111) GaAs VL - 298 ER - TY - JOUR AU - Russ, M. AU - Meier, Cedrik AU - Marquardt, B. AU - Lorke, A. AU - Reuter, D. AU - Wieck, A. D. ID - 7647 IS - 9-10 JF - Phase Transitions SN - 0141-1594 TI - Quantum dot electrons as controllable scattering centers in the vicinity of a two-dimensional electron gas VL - 79 ER -