TY - JOUR AU - Verhagen, Armin AU - Futterer, Sylvia AU - Rupprecht, Josef AU - Trächtler, Ansgar ID - 23337 JF - Proc. FISITA TI - Vehicle Dynamics Management - Benefits of Integrated Control of Active Brake, Active Steering and Active Suspension Systems ER - TY - CONF AU - Goetz, F. AU - Boenning, B. AU - Domik, Gitta ID - 21780 T2 - Proc. of The 4th IASTED International Conference on Visualization, Imgaging, and Image Processing TI - Mapping High Quality Textures on an Interactive Globe ER - TY - CONF AU - Fu, Bo AU - Hemsel, Tobias AU - Wallaschek, Jörg ID - 8951 T2 - Proceedings of the 18th International Congress on Acoustics, ICA TI - Model-based Diagnosis for Sandwiched Ultrasonic Transducers ER - TY - CONF AB - In turbomachinery, friction contacts are widely used to reduce dynamic stresses in turbine blades in order to avoid expensive damages. As a result of energy dissipation in the friction contacts the blade vibration amplitudes are reduced. In case of so-called friction dampers, which are pressed on the platforms of the blades by centrifugal forces, the damping effect can be optimized by varying the damper mass. This optimization can be done by means of a simulation model applying the so-called component mode synthesis and the Harmonic Balance Method to reduce computation time. It is based on the modal description of each substructure. In a real turbine or compressor blading great differences in the magnitude of the individual blade amplitudes occur caused by unavoidable mistuning of all system parameters like contact parameters and natural frequencies of the blades. It may happen that most of the blades experience only small stresses whereas a few blades experience critical stresses. Therefore, it is necessary to consider mistuning for all system parameters to simulate the forced response of bladed disk assemblies with friction contacts. For a mistuned bladed disk the complete system has to be modeled to calculate the dynamic response. In practice, usually the standard deviations instead of the distributions of the system parameters are known. Therefore, Monte-Carlo simulations are necessary to calculate the forced response of the blades for given mean values and standard deviations of the system parameters. To reduce the computational time, an approximate method has been developed and extended for small and moderate standard deviations of the system parameters to calculate the distribution and the envelopes of the frequency response functions for statistically varying system parameters, in the following called statistical mistuning. The approximate method is based on a sensitivity analysis and the assumption of a Weibull distribution of the vibration amplitudes of the blades. Both, the approximate method and the assumption of a Weibull distribution of the vibration amplitudes are validated by Monte-Carlo simulations. By these investigations the influence of different arrangements of the system parameters for given mean values and standard deviations of the vibration amplitudes of the blades can be determined, too. For the present investigations only a small influence of the arrangement of blades with respect to their natural frequencies has been observed. On the other hand, an intentional mistuning of the damper masses and the natural frequencies of the blades in a systematic way, in the following called systematic mistuning, can be investigated to reduce the amplitudes of the system. The simulation results of a systematic mistuning has been validated by a test rig with a rotating bladed disk assembly with friction dampers. The investigations show a good agreement between the simulations and the measurements but only a slight decrease of the maximum amplitudes in case of a systematic mistuning. Copyright {\copyright} 2004 by ASME AU - Götting, Florian AU - Sextro, Walter AU - Panning, Lars AU - Popp, Karl ID - 8952 IS - GT2004-53310 KW - Friction KW - Disks T2 - Proceedings of ASME TURBO Expo, Power for Land, Sea, and Air TI - Systematic mistuning of bladed disk assemblies with friction contacts VL - 6 ER - TY - CONF AU - Hemsel, Tobias ID - 8953 T2 - Proceedings of the First International Conference on Ultrasonic Motors and Actuators (IWOUMA) TI - Linear piezoelectric motors and their application ER - TY - CONF AB - Several positioning tasks demand translatory drive instead of rotary motion. To achieve drives that are capable e.g. to drive the sunroof of a car or to lift a car's window, multiple miniaturized motors can be combined. But in this case many other questions arise: the electromechanical behavior of the individual motors differs slightly, the motor characteristics are strongly dependent on the driving parameters and the driven load, many applications need some extra power for special cases like overcoming higher forces periodically. Thus, the bundle of motors has to act well organized and controlled to get an optimized drive that is not oversized and costly. AU - Hemsel, Tobias AU - Mracek, Maik AU - Wallaschek, Jörg AU - Vasiljev, Piotr ID - 9519 IS - Vol.2 KW - drives KW - electromechanical effects KW - linear motors KW - ultrasonic motors KW - car sunroof KW - car window KW - electromechanical behavior KW - high power ultrasonic linear motors KW - multiple miniaturized motors KW - positioning tasks KW - translatory drive KW - Costs KW - Electromagnetic forces KW - Frequency KW - Laboratories KW - Manufacturing KW - Mechatronics KW - Micromotors KW - Ultrasonic imaging KW - Vibrations KW - Voltage SN - 1051-0117 T2 - Ultrasonics Symposium, 2004 IEEE TI - A novel approach for high power ultrasonic linear motors VL - 2 ER - TY - JOUR AB - Friction, especially friction of elastomers, can cause acoustic problems like noise, squeal and comfort drawbacks like vibrations and wear. Therefore, rubber friction affects the function of many products in technical applications, e.g. seals, belts and tires. It can be classified according to different physical phenomena like adhesion, hysteresis, cohesion and viscous friction, see [3]. The topic of this paper is hysteresis friction of rubber that is caused by the energy dissipation due to internal material damping during the process of deformation. The deformation itself occurs during the sliding of a rubber element across the micro-scaled asperities of a rough surface. In this paper, the sliding process of a rubber element over real surfaces is simulated in time domain and compared to experiments. ({\^A}{\copyright} 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) AU - Lindner, Markus AU - Sextro, Walter AU - Popp, Karl ID - 9520 IS - 1 JF - PAMM SN - 1617-7061 TI - Hysteretic Friction of a Sliding Rubber Element VL - 4 ER - TY - CONF AU - Littmann, Walter AU - Hemsel, Tobias AU - Wallaschek, Jörg ID - 9521 T2 - Proceedings of the 18th International Congress on Acoustics TI - Design criteria for piezoelectric transformers VL - 4 ER - TY - CONF AU - Mracek, Maik AU - Wallaschek, Jörg AU - Hemsel, Tobias ID - 9522 T2 - Proceedings of the 18th International Congress on Acoustics TI - Self configuration of miniature ultrasonic linear motors ER - TY - CONF AB - During operation, the rotating blades of a gas turbine are subjected to centrifugal forces as well as fluctuating gas forces, resulting in blade vibrations. In addition to material damping, aerodynamical and blade root damping, underplatform dampers are widely used to increase the amount of damping and to decrease blade vibration amplitudes. The friction forces generated by the relative displacements between the underplatform damper and the blade platforms provide a significant amount of energy dissipation. In practice, a number of different underplatform damper designs are applied. Basically, these are wedge dampers with flat contact areas, cylindrical dampers with curved surfaces or asymmetrical dampers with both flat contact surfaces on one side and curved contact surfaces on the other. The latter damper type combines the advantages of both the wedge and the cylindrical damper by preventing the damper from pure rolling on the one hand as it has been observed for cylindrical dampers and on the other hand, avoiding a diverged plane area contact in case of a wedge damper, causing a damper lift-off. This paper will focus on the investigation of cylindrical and asymmetrical underplatform dampers. A comparison between measurements of rotating assemblies in Siemens PG gas turbines (V84.2, V64.3A and V94.3A(2)) under test and real operating conditions with cylindrical and asymmetrical underplatform dampers and the predictions of the developed theoretical model are presented. Special attention is paid to the frequency shift due to the application of an underplatform damper, since in particular for stationary gas turbines, in addition to the amplitude reduction, the accurate prediction of the resonance frequency is of major interest. Copyright {\copyright} 2004 by ASME AU - Panning, Lars AU - Popp, Karl AU - Sextro, Walter AU - Götting, Florian ID - 9523 IS - GT2004-53316 KW - Dampers KW - Gas turbines T2 - Proceedings of ASME TURBO Expo, Power for Land, Sea, and Air TI - Asymmetrical Underplatform Dampers in Gas Turbine Bladings: Theory and Application VL - 6 ER - TY - CONF AU - Fu, Bo AU - Hemsel, Tobias AU - Wallaschek, Jörg ID - 9524 T2 - Proceedings of the 18th International Congress on Acoustics, ICA TI - Model-based Diagnosis for Sandwiched Ultrasonic Transducers ER - TY - GEN ED - Engels, Gregor ED - Seehusen, S. ID - 7782 IS - P-52 TI - Proceedings of "DeLFI 2004: Die 2. e-Learning Fachtagung Informatik", Paderborn (Germany) ER - TY - GEN ED - Engels, Gregor ED - Sauer, Stefan ID - 7783 IS - 6 TI - Modeling and Development of Multimedia Systems VL - 14 ER - TY - GEN ED - Ehrig, Hartmut ED - Engels, Gregor ED - Parisi-Presicce, F. ED - Rozenberg, Grzegorz ID - 7784 TI - Proceedings of the 2nd International Conference on Graph Transformations (ICGT 2004), Rome (Italy) VL - 3256 ER - TY - CONF AU - Schattkowsky, Tim AU - Loeser, Christoph AU - Müller, Wolfgang ID - 7917 T2 - Proceedings of the 18th International Conference on Advanced Information Networking and Applications (AINA 2004), Fukuoka (Japan) TI - Peer-To-Peer Technology for Interconnecting Web Services in Heterogeneous Networks ER - TY - CONF AU - Baresi, Luciano AU - Heckel, Reiko AU - Thöne, Sebastian AU - Varró, Dániel ID - 7918 T2 - Proceedings of the conference on Software Architecture (WICSA 2004), Oslo (Norway) TI - Style-Based Refinement of Dynamic Software Architectures ER - TY - CONF AU - Belli, Fevzi AU - Güldali, Baris ID - 7919 T2 - Proceedings of the conference on Computer and Information Sciences (ISCIS 2004), Kemer-Antalya (Turkey) TI - Software Testing via Model Checking VL - 3280 ER - TY - CONF AU - Heckel, Reiko AU - Guo, Ping ID - 7920 T2 - Proceedings of the conference on Mobile Information Systems (MOBIS 2004), Oslo (Norway) TI - Conceptual Modeling of Styles For Mobile Systems: A layered approach based on graph transformation VL - 158 ER - TY - CONF AU - Heckel, Reiko AU - Cherchago, Alexey ID - 7921 T2 - Proceedings of the seminar on Language Engineering for Model-Driven Software Development (2003), Dagstuhl (Germany) TI - Application of Graph Transformation for Automating Web Service Discovery ER - TY - CONF AU - Schattkowsky, Tim AU - Müller, Wolfgang ID - 7922 T2 - Proceedings of the 7th IEEE International Symposium on Object-Oriented Real-Time Distributed Computing (ISORC 2004), Vienna (Austria) TI - Model-Based Design of Embedded Systems ER - TY - CONF AU - Cherchago, Alexey AU - Heckel, Reiko ID - 7923 T2 - Proceedings of the conference on Graph Transformation (ICGT 2004), Rome (Italy) TI - Specification Matching of Web Services Using Conditional Graph Transformation Rules VL - 3256 / 2004 ER - TY - CONF AU - Böttcher, Stefan AU - Groppe, Sven AU - Schattkowsky, Tim ID - 7924 T2 - Proceedings of the 8th World Multi-Conference on Systemics, Cybernetics and Informatics (SCI 2004), Orlando, FL (USA) TI - Automated Data and Service Mapping for Integrated Electronic Markets ER - TY - CONF AU - Eden, Jonas AU - Weber, Matthias AU - Reiser, Mark-Oliver AU - Wierczoch, Thomas AU - Freund, Ulrich AU - Gurrieri, Orazio AU - Küster, Jochen AU - Lönn, Henrik AU - Migge, Jörn ID - 7925 T2 - Proceedings of the 14th International Symposium and 4th European Systems Engineering Conference (INCOSE 2004), Toulouse (France) TI - An Architecture Description Language for Developing Automotive ECU-Software ER - TY - CONF AU - Engels, Gregor AU - Sauer, Stefan ID - 7926 IS - 6 T2 - International Journal of Software Engineering and Knowledge Engineering (IJSEKE) TI - Guest Editors' Introduction VL - 14 ER - TY - CONF AU - Guo, Ping AU - Heckel, Reiko ID - 7927 T2 - Proceedings of the 19th IEEE international conference on Automated software engineering (ASE 2004) TI - Modeling and Simulation of Context-Aware Mobile Systems ER - TY - CONF AU - Guo, Ping AU - Heckel, Reiko ID - 7928 T2 - Proceedings of the 2nd International Fujaba Days (2004), Darmstadt (Germany) TI - Simulation and Testing of Mobile Computing Systems using Fujaba ER - TY - CONF AU - Schattkowsky, Tim AU - Müller, Wolfgang ID - 7929 T2 - Proceedings of the conference on Design Automation and Test in Europe (DATE 2004), Paris, France TI - Model-Based Specification and Execution of Embedded Real-Time Systems VL - 2 ER - TY - CONF AU - Schattkowsky, Tim ID - 7930 T2 - Proceedings of the 10th International Conference on Information Systems Analysis and Synthesis (ISAS 2004), Orlando, FL (USA) TI - Direct Execution of UML 2.0 Sequence Diagrams ER - TY - CONF AU - Schattkowsky, Tim ID - 7931 T2 - Proceedings of the conference on Systemics, Cybernetics and Informatics (SCI 2004), Orlando, FL (USA) TI - Efficient Execution of UML State Machines on a Virtual Machine ER - TY - CONF AU - Hendrik Hausmann, Jan AU - Heckel, Reiko AU - Lohmann, Marc ID - 7932 T2 - Proceedings of the IEEE International Conference on Web Services (ICWS 2004) TI - Model-based Discovery of Web Services ER - TY - CONF AU - Schattkowsky, Tim AU - Loeser, Christoph AU - Müller, Wolfgang ID - 7933 T2 - Proceedings of the International Conference on Networking (ICN 2004), Guadeloupe (France) TI - Peer-to-Peer-based Web Services for Collaborative Engineering Environments ER - TY - JOUR AU - Krauter, Stefan AU - Ochs, F. ID - 8248 IS - 2 JF - Renewable Energy TI - Integrated Solar Home System VL - 29 ER - TY - JOUR AU - Krauter, Stefan AU - Rüther, R. ID - 8249 IS - 3 JF - Renewable Energy Vol. 29, Issue 3 (2004), S. 345–355. TI - Considerations for the Calculation of Greenhouse Gas Reduction by Photovoltaic Solar Energy VL - 29 ER - TY - JOUR AU - Krauter, Stefan ID - 8253 JF - Solar Energy Materials & Solar Cells TI - Development of an integrated solar home system VL - 82 ER - TY - JOUR AU - Krauter, Stefan ID - 8254 JF - Solar Energy Materials & Solar Cells TI - Increased electrical yield via water flow over the front of photovoltaic panels VL - 82 ER - TY - JOUR AU - Krauter, Stefan AU - Depping, T. ID - 8290 JF - Solar Energy Materials & Solar Cells TI - Remote PV-system monitored via satellite VL - 82 ER - TY - CONF AU - Krauter, Stefan ID - 8291 T2 - Words into Action – The International Conference for Renewable Energies – Bonn 2004, Faircount, London (UK), S. 175 TI - Future Visions ER - TY - CONF AU - Krauter, Stefan ID - 8292 T2 - Proceedings of the Second World Renewable Energy Forum, Eurosolar, Bonn (Deutschland), 29.–31. Mai 2004 TI - Renewable Energies in Latin America ER - TY - CONF AU - Krauter, Stefan ID - 8293 T2 - Proceedings of the 19th European Photovoltaic Solar Energy Conference and Exhibition, Paris (Frankreich), 7.–11. Juni 2004, S. 2399–2402 TI - Enhanced Integrated Solar Home System ER - TY - CONF AU - Krauter, Stefan ID - 8294 T2 - Proceedings of the 19th European Photovoltaic Solar Energy Conference and Exhibition, Paris (Frankreich), 7.–11. Juni 2004, S. 3523–3526 TI - Photovoltaics in the Context of Carbon Trading ER - TY - CONF AU - Krauter, Stefan AU - Depping, T. ID - 8295 T2 - Proceedings of the 19th European Photovoltaic Solar Energy Conference and Exhibition, Paris (Frankreich), 7.–11. Juni 2004, S. 3527–3530 TI - Cost Reduction and Increase of Reliability for Remote PV-Systems by Satellite ER - TY - CONF AU - Krauter, Stefan AU - Calvacante, F. S. A. AU - Cunha, M. S. AU - de Lima, L. C. ID - 8296 T2 - Proceedings of the 19th European Photovoltaic Solar Energy Conference and Exhibition, Paris (Frankreich), 7.–11. Juni 2004, S. 3532 TI - PV in Combination with Micro Wind Turbines for Rural Household Electrification in the Northeast of Brazil ER - TY - JOUR AU - Krauter, Stefan AU - Kissel, J. ID - 8297 IS - July/August 2004 JF - Renewable Energy World TI - Renewable Energy in Latin America ER - TY - CONF AU - Krauter, Stefan ID - 8298 T2 - Proceedings of the International Seminar on Hydrogen Technologies, Buenos Aires (Argentina), 7.–9. September 2004 TI - Activities concerning the Set-up of an International University for Renewable Energy ER - TY - CONF AB - Voting via the Internet has become a feasible option for political as well as non-political ballots. However, there are many obstacles which have to be overcome, especially legal restrictions have to be transformed into technical and security solutions. The article starts with a brief presentation of advantages and disadvantages of Internet ballots and presents application fields and pilot schemes. Then, technological security aspects are derived due to democratic basic principles. Especially the applied voting procedures are critical in security terms. Hence, the most relevant cryptographic protocols are presented and their drawbacks and shortcomings are identified. However, this article does not propose a new voting protocol. Beyond fixing cryptographic procedures for ballots, more elements are to be specified, e.g. responsibilities and rights of involved authorities or security precautions regarding hardware and software. For this reason, a structural security framework for electronic voting systems is presented which can be used for their composition and analysis. AU - Schryen, Guido ID - 5765 T2 - 37th Annual Hawaii International Conference on System Sciences TI - Security Aspects of Internet Voting ER - TY - BOOK AU - Kabst, Rüdiger ID - 6143 SN - 978-3879888443 TI - Internationalisierung mittelständischer Unternehmen: Fünf Thesen zum Auslandsmarkterfolg ER - TY - CHAP AU - Kabst, Rüdiger AU - Brewster, C ED - Gaugler, E ED - Oechsler, W A ED - Weber, W ID - 6215 T2 - Handwörterbuch des Personalwesens TI - International komparatives Personalmanagement: Evidenz, Methodik & Klassiker des "Cranfield Projects on International Human Resource Management" ER - TY - CHAP AU - Dietz, B AU - Hoogendoorn, J AU - Kabst, Rüdiger AU - Schmelter, A ED - Brewster, C ED - Mayrhofer, W ED - Moley, M ID - 6216 T2 - Human Resource Management in Europe: Evidence of Convergence? TI - The Netherlands and Germany: Flexibility or Rigidity ER - TY - CHAP AU - Kabst, Rüdiger ED - Festing, M ED - Martin, A ED - Mayrhofer, W ED - Nienhüser, W ID - 6217 T2 - Personaltheorie als Beitrag zur Theorie der Unternehmung TI - Transaktionskostentheorie: Einführung, kritische Diskussion und Ansätze zur Weiterentwicklung ER - TY - JOUR AU - Kabst, Rüdiger AU - Weber, W ID - 6233 IS - 2 JF - Management Revue: The International Review of Management Studies. TI - Theoretical Perspectives for Human Resource Management: The German Discussion VL - 15 ER - TY - JOUR AU - Feng, Yuanhua ID - 4615 IS - 03 JF - Econometric Theory SN - 0266-4666 TI - SIMULTANEOUSLY MODELING CONDITIONAL HETEROSKEDASTICITY AND SCALE CHANGE VL - 20 ER - TY - BOOK AU - Feng, Yuanhua ID - 4630 TI - Non- and Semiparametric Regression with Fractional Time Series Errors ER - TY - CHAP AU - Heiler, Siegfried AU - Feng, Yuanhua ED - Metz, Rainer ED - Lösch, Manfred ED - Edel, Klaus ID - 4634 T2 - Zeitreihenanalyse in der empirischen Wirtschaftsforschung TI - A robust data-driven version of the Berlin Method ER - TY - JOUR AU - Paunescu, Mihai AU - Schneider, Martin ID - 4830 IS - 1 JF - Schmollers Jahrbuch: Journal of Applied Social Science Studies/Zeitschrift für Wirtschafts-und Sozialwissenschaften TI - Wettbewerbsfähigkeit und Dynamik institutioneller Standortbedingungen: Ein empirischer Test des „Varieties-of-Capitalism “-Ansatzes ER - TY - JOUR AU - Fahr, Rene AU - Sunde, Uwe ID - 4891 IS - 3 JF - Oxford Economic Papers TI - Occupational job creation: patterns and implications ER - TY - GEN AU - Toshihiro, KODAMA AU - Yoshio, HIGUCHI AU - Masahiro, ABE AU - Fahr, Rene ID - 4900 TI - A Comparative Analysis of Job Entry Methods in Japan, the US and Europe (Japanese) ER - TY - CHAP AU - Fahr, Rene ID - 4907 T2 - The Economics of Time Use TI - Loafing or Learning? ER - TY - JOUR AU - Paunescu, Mihai AU - Schneider, Martin ID - 4923 IS - 1 JF - Schmollers Jahrbuch: Journal of Applied Social Science Studies/Zeitschrift f{\"u}r Wirtschafts-und Sozialwissenschaften TI - Wettbewerbsf{\"a}higkeit und Dynamik institutioneller Standortbedingungen: Ein empirischer Test des „Varieties-of-Capitalism “-Ansatzes ER - TY - GEN AU - Eggert, A ID - 4925 TI - Wertorientiertes Beziehungsmarketing in Kunden-Lieferantenbeziehungen. ER - TY - JOUR AU - Bliemel, Friedhelm AU - Eggert, Andreas AU - Fassott, Georg AU - Ballantyne, David ID - 4927 IS - 4 JF - Journal of Relationship Marketing SN - 1533-2667 TI - The Evolution of Relationship Marketing and the International Colloquia VL - 3 ER - TY - JOUR AB - UML offers different diagram types to model behavior and dynamics of software systems. In some domains like embedded real-time systems or multimedia systems, it is necessary to include specifications of time since the correctness of these applications depends on the fulfillment of temporal requirements in addition to functional requirements. UML thus already incorporates language features to model time and temporal constraints. Such model elements must have an equivalent in the semantic domain. We have proposed Dynamic Meta Modeling (DMM) as a means for the specification of the formal operational semantics of UML models by applying graph transformation to the meta modeling of dynamic behavior. Within this paper, we extend this approach to also account for time by building on timed graph transformations. We apply these concepts to the domain of multimedia application modeling in which we adopt UML sequence diagrams. The DMM rules with time then specify an interpreter that can be used to analyze or test a model of multimedia sequence diagrams. AU - Hendrik Hausmann, Jan AU - Heckel, Reiko AU - Sauer, Stefan ID - 7382 IS - 3 JF - Software and Systems Modeling TI - Dynamic Meta Modeling with Time: Specifying the Semantics of Multimedia Sequence Diagrams VL - 3 ER - TY - CHAP AB - We present the adaptive cruise controller case study for B modelling and the model checking by RAVEN. Individual translations of B operations, data types, and invariants to the RAVEN Input Language are presented by the example of the case study. AU - Krupp, Alexander AU - Lundkvist, Ola AU - Schattkowsky, Tim AU - Snook, Colin ED - Mermet, J. ID - 7533 T2 - UML-B System Specification for Proven Electronic Design TI - Adaptive Cruise Controller Case Study ER - TY - CHAP AB - This article presents the E-COLLEG Tool Registration and Management Services (TRMS) with open XML-based data exchange, tool integration and remote invocation capabilities. TRMS is a workflow management middleware tailored to distance spanning engineering collaboration and security enabled data exchange. The infrastructure is validated through two industrial Intranet-crossing case studies between Polish, French, and German chip manufacturing industries applying real-world development scenarios. In both application scenarios, common engineering practices have been identified and built into engineering workflows. Further, the current truly pan-European collaborative industrial scenarios show promising results with respect to the stability of the implemented software and easy application and flexibility of the provided interfaces. AU - Schattkowsky, Tim AU - Mueller, Wolfgang AU - Pawlak, Adam ED - Fischer, L. ID - 7534 T2 - Workflow Handbook 2004 TI - Workflow Management Middleware for Secure Distance-Spanning Collaborative Engineering ER - TY - THES AU - Küster, Jochen ID - 7585 TI - Consistency Management of Object-Oriented Behavioral Models ER - TY - THES AB - This dissertation describes an approach to the visual modeling of software systems which are composed of autonomous and proactive software entities interacting with their environment. These entities are named software agents. More and more software systems are distributed, dynamic and open with respect to their environment. Software agents shall ease the development of such systems. Agent based systems provide a modular structure. They are robust and can be adapted dynamically to changing requirements. The notion of software agent relies on the fundamental properties of autonomy, proactivity and structured interaction. According to these properties agents are distinguished from objects and components. For the development of agent based systems an appropriate modeling language and a process model describing the correct usage of the language are demanded. For both aspects only unsufficient or incomplete approaches exist. This thesis contributes to the solution in the following way: A new abstract and formal model of agent based systems shows, that the fundamental properties can be expressed precisely. Differently from existing models not only a single agent but a multi agent system can be modeled. The most important architectural models of agent-based systems are compatible with the abstract model. The rather restricted structure of the abstract model motivates the refinement by a model of coupled I/Oautomata. The Unified Modeling Language is widely used in industrial software development. Therefore, the new language AML (Agent Modeling Language) for the development of agent-based systems is defined as a UML profile. The semantics of AML models is defined in the semantic domain of graph transformation. The semantic domain is restricted to an adequate agent-oriented domain. There the constituents of the fundamental agent properties are defined. Agent based systems which are described using AML are shown to be compatible with I/O-automata model of multi agent systems. Constituents for proactivity are goals and strategies. In this thesis, it is shown that the reachability of goals through the application of strategies can be checked by applying a model checking method. The new process model APM describes, how the language AML can be applied to the modeling of agent-based systems. AU - Depke, Ralph ID - 7586 TI - Visuelle Modellierung agentenbasierter Systeme ER - TY - JOUR AU - Haberer, E. D. AU - Sharma, R. AU - Meier, Cedrik AU - Stonas, A. R. AU - Nakamura, S. AU - DenBaars, S. P. AU - Hu, E. L. ID - 7678 IS - 22 JF - Applied Physics Letters SN - 0003-6951 TI - Free-standing, optically pumped, GaN∕InGaN microdisk lasers fabricated by photoelectrochemical etching VL - 85 ER - TY - JOUR AU - Knipping, Jörg AU - Wiggers, Hartmut AU - Rellinghaus, Bernd AU - Roth, Paul AU - Konjhodzic, Denan AU - Meier, Cedrik ID - 7679 IS - 8 JF - Journal of Nanoscience and Nanotechnology SN - 1533-4880 TI - Synthesis of High Purity Silicon Nanoparticles in a Low Pressure Microwave Reactor VL - 4 ER - TY - JOUR AU - Wibbelhoff, O AU - Meier, Cedrik AU - Lorke, A AU - Schafmeister, P AU - Wieck, A.D ID - 7680 IS - 2-4 JF - Physica E: Low-dimensional Systems and Nanostructures SN - 1386-9477 TI - Wave function mapping of self-assembled quantum dots by capacitance spectroscopy VL - 21 ER - TY - CONF AU - Sendall, Shane AU - Hauser, Rainer AU - Koehler, Jana AU - Küster, Jochen AU - Wahler, Michael ID - 8386 T2 - Proceedings of the Workshop on Software Transformation Systems (STS 2004, satellite event of the 3rd International Conference on Generative Programming and Component Engineering (GPCE 2004)), Vancouver (Canada) TI - Understanding Model Transformation by Classification and Formalization ER - TY - CONF AU - Heckel, Reiko AU - Thöne, Sebastian ID - 8387 T2 - Proceedings of the workshop on Algebraic Development Techniques (WADT 2004), Barcelona (Spain) TI - Behavior-Preserving Refinement Relations between Dynamic Software Architectures VL - 3423 ER - TY - CONF AU - Heckel, Reiko AU - Cherchago, Alexey AU - Lohmann, Marc ID - 8388 T2 - Proceedings of the First International Workshop on Web Services and Formal Methods (WSFM 2004), Pisa, Italy TI - A Formal Approach to Service Specification and Matching based on Graph Transformation VL - 105 ER - TY - CONF AU - Küster, Jochen ID - 8389 T2 - Proceedings 3rd UML Workshop in Software Model Engineering (WiSME 2004), Lisbon (Portugal) TI - Systematic Validation of Model Transformations ER - TY - CONF AU - Küster, Jochen AU - Sendall, Shane AU - Wahler, Michael ID - 8390 T2 - Proceedings of the Workshop on OCL and Model Driven Engineering (satellite event of the UML 2004), Lisbon (Portugal) TI - Comparing two Model Transformation Approaches ER - TY - CONF AU - Küster, Jochen ID - 8391 T2 - International Workshop on Graph Transformation (GT-VMT 2004), Barcelona (Spain) TI - Towards Inconsistency Handling of Object-Oriented Behavioral Models VL - 109 ER - TY - CONF AU - Schattkowsky, Tim AU - Rettberg, Achim ID - 8392 T2 - Proceedings of the International Workshop on UML for SoC Design (UML-SOC 2004), San Diego, CA (USA) TI - UML for FPGA Synthesis ER - TY - CONF AU - Sendall, Shane AU - Küster, Jochen ID - 8393 T2 - Proceedings of Workshop on Best Practices for Model-Driven Software Development (satellite event of the 19th Annual ACM Conference on Object-Oriented Programming, Systems, Languages, and Applications (OOPSLA 2004)), Vancouver (Canada) TI - Taming Model Round-Trip Engineering ER - TY - CHAP AU - Kremer, H.-Hugo ED - Banks, S. ED - Goodyear, P. ED - Hodgson, V. ED - Jones, C. ED - Lally, V. ED - McConnel, D. ED - Steeples, C. ID - 8450 T2 - Networked Learning 2004. A research based conference on e-learning in higher education and lifelong learning TI - Virtual conference: a telecooperative learning environment ER - TY - CHAP AU - Deißinger, T. AU - Kremer, H.-Hugo ED - Backes-Haase, A. ED - Frommer, H. ID - 8451 T2 - Theorie-Praxis-Verzahnung in der beruflichen und gymnsasialen Lehrerbildung. Das Praxissemester in Baden-Württemberg. TI - Organisation und didaktische Ausrichtung des "Praxissemesters" im Rahmen des Diplomstudiengangs Wirtschaftspädagogik an der Universität Konstanz ER - TY - CHAP AU - Kremer, H.-Hugo ED - Gramlinger, F. ED - Steinemann, S. ED - Tramm, T. ID - 8452 T2 - Lernfelder gestalten - miteinander Lernen - Innovationen vernetzen. Ergebnisse der 1. CULIK Fachtagung (12.05.2004) TI - Qualifizierungsnetzwerke - Lernumgebung für Lehrkräfte? ER - TY - CHAP AU - Kremer, H.-Hugo ED - Bennett, R. ID - 8453 T2 - The annual conference of the Association for Information Technology in Teacher Education TI - Virtual conference - a cooperative learning environment for teacher education? ER - TY - CHAP AU - Kremer, H.-Hugo ED - Gramlinger, F. ED - Steinemann, S. ED - Tramm, T. ID - 8454 T2 - Lernfelder gestalten - miteinander Lernen - Innovationen vernetzen. Ergebnisse der 1. CULIK Fachtagung TI - Qualifizierungsnetzwerke - Lernumgebung für Lehrkräfte ER - TY - JOUR AU - Gross, James AU - Klaue, Jirka AU - Karl, Holger AU - Wolisz, Adam ID - 850 IS - 11 JF - Computer Communications TI - Cross-layer optimization of OFDM transmission systems for MPEG-4 video streaming ER - TY - JOUR AU - Niebert, Norbert AU - Schieder, Andreas AU - Abramowicz, Henrik AU - Malmgren, G. AU - Sachs, Joachim AU - Horn, Uwe AU - Prehofer, Christian AU - Karl, Holger ID - 851 IS - 2 JF - IEEE Wireless Communications TI - Ambient networks: An architecture for communication networks beyond 3G ER - TY - CONF AU - Handziski, Vlado AU - Köpke, Andreas AU - Karl, Holger AU - Frank, Christian AU - Drytkiewicz, Witold ID - 852 T2 - Wireless Sensor Networks, First European Workshop, EWSN 2004, Berlin, Germany, January 19-21, 2004, Proceedings TI - Improving the Energy Efficiency of Directed Diffusion Using Passive Clustering ER - TY - CONF AU - Typpö, Ville AU - Eisl, Jochen AU - Höller, Jan AU - Agüero, Ramon AU - Karl, Holger ID - 853 T2 - Broadband Satellite Comunication Systems and the Challenges of Mobility - IFIP TC6 Workshops on Broadband Satellite Communication Systems and Challenges of Mobility, World Computer Congress, August 22-27, 2004, Toulouse, France TI - Research Challenges in Mobility and Moving Networks: An Ambient Networks View ER - TY - CONF AU - Frank, Christian AU - Karl, Holger ID - 854 T2 - Proceedings of the 7th International Symposium on Modeling Analysis and Simulation of Wireless and Mobile Systems, MSWiM 2004, Venice, Italy, October 4-6, 2004 TI - Consistency challenges of service discovery in mobile ad hoc networks ER - TY - CONF AU - Marie Feeney, Laura AU - Hollos, Daniel AU - Kubisch, Martin AU - Mengesha, Seble AU - Karl, Holger ID - 855 T2 - NETWORKING 2004, Networking Technologies, Services, and Protocols; Performance of Computer and Communication Networks; Mobile and Wireless Communication, Third International IFIP-TC6 Networking Conference, Athens, Greece, May 9-14, 2004, Proceedings TI - A Geometric Derivation of the Probability of Finding a Relay in Multi-rate Networks ER - TY - CONF AU - Hollos, Daniel AU - Karl, Holger AU - Wolisz, Adam ID - 856 T2 - 2004 IEEE Wireless Communications and Networking Conference, WCNC 2004, Atlanta, Georgia, USA, 21-25 March 2004 TI - Regionalizing global optimization algorithms to improve the operation of large ad hoc networks ER - TY - CONF AU - Raguin, David AU - Kubisch, Martin AU - Karl, Holger AU - Wolisz, Adam ID - 857 T2 - 2004 IEEE Wireless Communications and Networking Conference , WCNC 2004, Atlanta, Georgia, USA, 21-25 March 2004 TI - Queue-driven cut-through medium access in wireless ad hoc networks ER - TY - CHAP AU - Karl, Holger ID - 858 T2 - Location-Based Services TI - Data Transmission in Mobile Communication Systems ER - TY - GEN ED - Karl, Holger ED - Willig, Andreas ED - Wolisz, Adam ID - 859 SN - 3-540-20825-9 TI - Wireless Sensor Networks ER - TY - JOUR AU - Langbein, W. AU - Borri, P. AU - Woggon, U. AU - Schwab, M. AU - Bayer, M. AU - Fafard, S. AU - Wasilewski, Z. AU - Hawrylak, P. AU - Stavarache, V. AU - Reuter, Dirk AU - Wieck, A.D. ID - 8676 JF - Physica E: Low-dimensional Systems and Nanostructures SN - 1386-9477 TI - Coherent dynamics in InGaAs quantum dots and quantum dot molecules ER - TY - JOUR AU - Reuter, Dirk AU - Kailuweit, P. AU - Wieck, A.D. AU - Zeitler, U. AU - Maan, J.C. ID - 8680 JF - Physica E: Low-dimensional Systems and Nanostructures SN - 1386-9477 TI - Magnetic field dependence of hole levels in InAs quantum dots ER - TY - JOUR AU - Schuster, E. AU - Keune, W. AU - Lo, F.-Y. AU - Reuter, Dirk AU - Wieck, A. AU - Westerholt, K. ID - 8687 JF - Superlattices and Microstructures SN - 0749-6036 TI - Preparation and characterization of epitaxial Fe(001) thin films on GaAs(001)-based LED for spin injection ER - TY - JOUR AU - Schmidt, R. AU - Vitzethum, M. AU - Fix, R. AU - Scholz, U. AU - Malzer, S. AU - Metzner, C. AU - Kailuweit, P. AU - Reuter, Dirk AU - Wieck, A. AU - Hübner, M.C. AU - Stufler, S. AU - Zrenner, A. AU - Döhler, G.H. ID - 8688 JF - Physica E: Low-dimensional Systems and Nanostructures SN - 1386-9477 TI - Electroluminescence of single-dot nano-LEDs—optical spectroscopy of an electrically tunable few-electron/hole system ER - TY - JOUR AU - Kähler, D AU - Knop, M AU - Kunze, U AU - Reuter, Dirk AU - Wieck, A D ID - 8692 JF - Semiconductor Science and Technology SN - 0268-1242 TI - Dual-gate GaAs/AlGaAs quantum point contact with tuneable subband energy separation ER - TY - JOUR AU - Kähler, Dirk AU - Kunze, Ulrich AU - Reuter, Dirk AU - D. Wieck, Andreas ID - 8695 JF - Physica E: Low-dimensional Systems and Nanostructures SN - 1386-9477 TI - Ultrasmall nanoscale devices fabricated from compensating-layer GaAs/AlGaAs heterostructures ER - TY - JOUR AU - Petrosyan, S. AU - Yesayan, A. AU - Reuter, Dirk AU - Wieck, A. D. ID - 8696 JF - Applied Physics Letters SN - 0003-6951 TI - The linearly graded two-dimensional p–n junction ER - TY - JOUR AU - Riedesel, C AU - Reuter, Dirk AU - Wieck, A.D ID - 8697 JF - Physica E: Low-dimensional Systems and Nanostructures SN - 1386-9477 TI - Laterally patterned high mobility two-dimensional electron gases obtained by overgrowth of focused ion beam implanted Al1−xGaxAs ER - TY - JOUR AU - Reuter, Dirk AU - Schafmeister, P. AU - Kailuweit, P. AU - Wieck, A.D. ID - 8698 JF - Physica E: Low-dimensional Systems and Nanostructures SN - 1386-9477 TI - Frequency-dependent C(V) spectroscopy of the hole system in InAs quantum dots ER -