@inproceedings{7923,
author = {Cherchago, Alexey and Heckel, Reiko},
booktitle = {Proceedings of the conference on Graph Transformation (ICGT 2004), Rome (Italy)},
pages = {304--318},
publisher = {Springer},
title = {{Specification Matching of Web Services Using Conditional Graph Transformation Rules}},
doi = {http://dx.doi.org/10.1007/b100934},
volume = {3256 / 2004},
year = {2004},
}
@inproceedings{7928,
author = {Guo, Ping and Heckel, Reiko},
booktitle = {Proceedings of the 2nd International Fujaba Days (2004), Darmstadt (Germany)},
title = {{Simulation and Testing of Mobile Computing Systems using Fujaba}},
year = {2004},
}
@inproceedings{7930,
author = {Schattkowsky, Tim},
booktitle = {Proceedings of the 10th International Conference on Information Systems Analysis and Synthesis (ISAS 2004), Orlando, FL (USA)},
title = {{Direct Execution of UML 2.0 Sequence Diagrams}},
year = {2004},
}
@proceedings{7783,
editor = {Engels, Gregor and Sauer, Stefan},
number = {6},
publisher = {World Scientific},
title = {{Modeling and Development of Multimedia Systems}},
doi = {http://dx.doi.org/10.1142/S021819400400183X},
volume = {14},
year = {2004},
}
@inproceedings{8952,
abstract = {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},
author = {Götting, Florian and Sextro, Walter and Panning, Lars and Popp, Karl},
booktitle = {Proceedings of ASME TURBO Expo, Power for Land, Sea, and Air},
keyword = {Friction, Disks},
number = {GT2004-53310},
pages = {257--267},
title = {{Systematic mistuning of bladed disk assemblies with friction contacts}},
volume = {6},
year = {2004},
}
@article{851,
author = {Niebert, Norbert and Schieder, Andreas and Abramowicz, Henrik and Malmgren, G. and Sachs, Joachim and Horn, Uwe and Prehofer, Christian and Karl, Holger},
journal = {IEEE Wireless Communications},
number = {2},
pages = {14----22},
title = {{Ambient networks: An architecture for communication networks beyond 3G}},
doi = {10.1109/MWC.2004.1295733},
year = {2004},
}
@inproceedings{856,
author = {Hollos, Daniel and Karl, Holger and Wolisz, Adam},
booktitle = {2004 IEEE Wireless Communications and Networking Conference, WCNC 2004, Atlanta, Georgia, USA, 21-25 March 2004},
pages = {819----824},
title = {{Regionalizing global optimization algorithms to improve the operation of large ad hoc networks}},
doi = {10.1109/WCNC.2004.1311292},
year = {2004},
}
@inbook{8452,
author = {Kremer, H.-Hugo},
booktitle = {Lernfelder gestalten - miteinander Lernen - Innovationen vernetzen. Ergebnisse der 1. CULIK Fachtagung (12.05.2004)},
editor = {Gramlinger, F. and Steinemann, S. and Tramm, T.},
title = {{Qualifizierungsnetzwerke - Lernumgebung für Lehrkräfte?}},
year = {2004},
}
@inproceedings{8387,
author = {Heckel, Reiko and Thöne, Sebastian},
booktitle = {Proceedings of the workshop on Algebraic Development Techniques (WADT 2004), Barcelona (Spain)},
pages = {1--27},
publisher = {Springer},
title = {{Behavior-Preserving Refinement Relations between Dynamic Software Architectures}},
volume = {3423},
year = {2004},
}
@article{8692,
author = {Kähler, D and Knop, M and Kunze, U and Reuter, Dirk and Wieck, A D},
issn = {0268-1242},
journal = {Semiconductor Science and Technology},
pages = {140--143},
title = {{Dual-gate GaAs/AlGaAs quantum point contact with tuneable subband energy separation}},
doi = {10.1088/0268-1242/20/2/006},
year = {2004},
}
@article{8697,
author = {Riedesel, C and Reuter, Dirk and Wieck, A.D},
issn = {1386-9477},
journal = {Physica E: Low-dimensional Systems and Nanostructures},
pages = {592--596},
title = {{Laterally patterned high mobility two-dimensional electron gases obtained by overgrowth of focused ion beam implanted Al1−xGaxAs}},
doi = {10.1016/j.physe.2003.11.085},
year = {2004},
}
@article{8700,
author = {Regul, J. and Hohls, F. and Reuter, Dirk and Wieck, A.D. and Haug, R.J.},
issn = {1386-9477},
journal = {Physica E: Low-dimensional Systems and Nanostructures},
pages = {272--275},
title = {{High frequency conductance of a quantum point contact}},
doi = {10.1016/j.physe.2003.11.266},
year = {2004},
}
@article{8705,
author = {Schaapman, M.R. and Zeitler, U. and Christianen, P.C.M. and Maan, J.C. and Reuter, Dirk and Wieck, A.D.},
issn = {1386-9477},
journal = {Physica E: Low-dimensional Systems and Nanostructures},
pages = {86--89},
title = {{Magnetization of multi-component two-dimensional quantum-Hall systems}},
doi = {10.1016/j.physe.2003.11.222},
year = {2004},
}
@article{8712,
author = {Bryja, L. and Kubisa, M. and Ryczko, K. and Misiewicz, J. and Stȩpniewski, R. and Byszewski, M. and Potemski, M. and Reuter, Dirk and Wieck, A.},
issn = {0921-4526},
journal = {Physica B: Condensed Matter},
pages = {442--445},
title = {{Magnetic-field-induced excitons in photoluminescence from heavily doped p-type Ga1−xAlxAs/GaAs single heterojunction}},
doi = {10.1016/j.physb.2004.01.123},
year = {2004},
}
@article{8729,
author = {Ebbers, A. and Reuter, Dirk and Heuken, M. and Wieck, A.D.},
issn = {0749-6036},
journal = {Superlattices and Microstructures},
pages = {381--388},
title = {{In-plane gate transistors in AlxGa1−xN/GaN heterostructures written by focused ion beams}},
doi = {10.1016/j.spmi.2004.02.012},
year = {2004},
}
@article{8680,
author = {Reuter, Dirk and Kailuweit, P. and Wieck, A.D. and Zeitler, U. and Maan, J.C.},
issn = {1386-9477},
journal = {Physica E: Low-dimensional Systems and Nanostructures},
pages = {446--449},
title = {{Magnetic field dependence of hole levels in InAs quantum dots}},
doi = {10.1016/j.physe.2004.08.078},
year = {2004},
}
@article{8248,
author = {Krauter, Stefan and Ochs, F.},
journal = {Renewable Energy},
number = {2},
pages = {153--164},
title = {{Integrated Solar Home System}},
volume = {29},
year = {2004},
}
@inproceedings{8293,
author = {Krauter, Stefan},
booktitle = {Proceedings of the 19th European Photovoltaic Solar Energy Conference and Exhibition, Paris (Frankreich), 7.–11. Juni 2004, S. 2399–2402},
title = {{Enhanced Integrated Solar Home System}},
year = {2004},
}
@inproceedings{8298,
author = {Krauter, Stefan},
booktitle = {Proceedings of the International Seminar on Hydrogen Technologies, Buenos Aires (Argentina), 7.–9. September 2004},
title = {{Activities concerning the Set-up of an International University for Renewable Energy}},
year = {2004},
}
@inbook{9594,
author = {Beutner, Marc},
booktitle = {Zukunft der Berufsausbildung in Deutschland: Empirische Untersuchungen und Schlussfolgerungen. Berichte zur Beruflichen Bildung 273},
editor = {Krekel, E. M. and Walden, G.},
pages = {94 -- 110},
title = {{Ein Determinantenmodell der Ausbildungsbereitschaft von Klein- und Mittelbetrieben – Basis für eine systematische Förderung der Berufsausbildung}},
year = {2004},
}