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 - TY - JOUR AU - Reuter, Dirk AU - Seekamp, A AU - Wieck, A.D ID - 8699 JF - Physica E: Low-dimensional Systems and Nanostructures SN - 1386-9477 TI - Fabrication of two-dimensional n- and p-type in-plane gate transistors from the same p-doped GaAs/In0.1Ga0.9As/Al0.33Ga0.67As heterostructure ER - TY - JOUR AU - Regul, J. AU - Hohls, F. AU - Reuter, Dirk AU - Wieck, A.D. AU - Haug, R.J. ID - 8700 JF - Physica E: Low-dimensional Systems and Nanostructures SN - 1386-9477 TI - High frequency conductance of a quantum point contact ER - TY - JOUR AU - Reuter, Dirk AU - Werner, C. AU - Riedesel, C. AU - Wieck, A.D. AU - Schuster, D. AU - Hansen, W. ID - 8701 JF - Physica E: Low-dimensional Systems and Nanostructures SN - 1386-9477 TI - Fabrication of two-dimensional p–n junctions formed by compensation doping of p-modulation doped GaAs/InyGa1−yAs/AlxGa1−x As heterostructures ER - TY - JOUR AU - Russ, M AU - Lorke, A AU - Reuter, Dirk AU - Schafmeister, P ID - 8702 JF - Physica E: Low-dimensional Systems and Nanostructures SN - 1386-9477 TI - Self-assembled quantum dots as probes for Landau-level spectroscopy ER - TY - JOUR AU - Würtz, A. AU - Deviatov, E.V. AU - Lorke, A. AU - Dolgopolov, V.T. AU - Reuter, Dirk AU - Wieck, A.D. ID - 8703 JF - Physica E: Low-dimensional Systems and Nanostructures SN - 1386-9477 TI - Separately contacted edge states in the fractional quantum Hall regime ER - TY - JOUR AU - Langbein, W. AU - Borri, P. AU - Woggon, U. AU - Stavarache, V. AU - Reuter, Dirk AU - Wieck, A. D. ID - 8704 JF - Physical Review B SN - 1098-0121 TI - Control of fine-structure splitting and biexciton binding inInxGa1−xAsquantum dots by annealing ER - TY - JOUR AU - Schaapman, M.R. AU - Zeitler, U. AU - Christianen, P.C.M. AU - Maan, J.C. AU - Reuter, Dirk AU - Wieck, A.D. ID - 8705 JF - Physica E: Low-dimensional Systems and Nanostructures SN - 1386-9477 TI - Magnetization of multi-component two-dimensional quantum-Hall systems ER - TY - JOUR AU - Schmidt, K. H. AU - Bock, C. AU - Versen, M. AU - Kunze, U. AU - Reuter, Dirk AU - Wieck, A. D. ID - 8706 JF - Journal of Applied Physics SN - 0021-8979 TI - Capacitance and tunneling spectroscopy of InAs quantum dots ER - TY - JOUR AU - Reuter, Dirk AU - Hoch, S. AU - Hausmanns, B. AU - Stahlmecke, B. AU - Dumpich, G. AU - Wieser, R. AU - Nowak, U. AU - Wieck, A.D. ID - 8707 JF - Journal of Magnetism and Magnetic Materials SN - 0304-8853 TI - Hall magnetometry on Co, Fe, and Py nanowires ER - TY - JOUR AU - Langbein, W. AU - Borri, P. AU - Woggon, U. AU - Stavarache, V. AU - Reuter, Dirk AU - Wieck, A. ID - 8709 JF - Physical Review B SN - 1098-0121 TI - Radiatively limited dephasing in InAs quantum dots ER - TY - JOUR AU - Deviatov, E. V. AU - Würtz, A. AU - Lorke, A. AU - Yu. Melnikov, M. AU - Dolgopolov, V. T. AU - Reuter, Dirk AU - Wieck, A. D. ID - 8710 JF - Physical Review B SN - 1098-0121 TI - Two relaxation mechanisms observed in transport between spin-split edge states at high imbalance ER - TY - JOUR AU - Grbić, B. AU - Ellenberger, C. AU - Ihn, T. AU - Ensslin, K. AU - Reuter, Dirk AU - Wieck, A. D. ID - 8711 JF - Applied Physics Letters SN - 0003-6951 TI - Magnetotransport in C-doped AlGaAs heterostructures ER - TY - JOUR AU - Bryja, L. AU - Kubisa, M. AU - Ryczko, K. AU - Misiewicz, J. AU - Stȩpniewski, R. AU - Byszewski, M. AU - Potemski, M. AU - Reuter, Dirk AU - Wieck, A. ID - 8712 JF - Physica B: Condensed Matter SN - 0921-4526 TI - Magnetic-field-induced excitons in photoluminescence from heavily doped p-type Ga1−xAlxAs/GaAs single heterojunction ER - TY - JOUR AU - Ebbers, A. AU - Reuter, Dirk AU - Heuken, M. AU - Wieck, A.D. ID - 8729 JF - Superlattices and Microstructures SN - 0749-6036 TI - In-plane gate transistors in AlxGa1−xN/GaN heterostructures written by focused ion beams ER - TY - JOUR AU - Tönnies, Merle ID - 8848 IS - 2 JF - Journal for the Study of British Cultures TI - New Britain as Consumer Country and Commodity VL - 11 ER - TY - CHAP AU - Beutner, Marc AU - Twardy, M ED - Dubs, R ED - Euler, D ED - Seitz, H ID - 9593 T2 - Aktuelle Aspekte in Schule und wissenschaftlichem Unterricht. Studien und Berichte des IWP TI - Wirtschaftspädagogische Sichtweise der Spannungsverhältnisse in der Lehrerbildung vor dem Hintergrund des Lernfeldansatzes unter Berücksichtigung des Komplementärprinzips VL - Band 14 ER - TY - CHAP AU - Beutner, Marc ED - Krekel, E. M. ED - Walden, G. ID - 9594 T2 - Zukunft der Berufsausbildung in Deutschland: Empirische Untersuchungen und Schlussfolgerungen. Berichte zur Beruflichen Bildung 273 TI - Ein Determinantenmodell der Ausbildungsbereitschaft von Klein- und Mittelbetrieben – Basis für eine systematische Förderung der Berufsausbildung ER - TY - GEN AU - Tönnies, Merle ID - 9657 IS - 4 T2 - Anglia TI - Mergenthal, S.: A Fast-Forward Version of England, 2003 VL - 122 ER - TY - CONF AU - Niebert, Norbert AU - Flinck, Hannu AU - Hancock, Robert AU - Karl, Holger AU - Prehofer, Christian ID - 988 T2 - 13th IST Mobile and Wireless Communications-Summit 2004 TI - Ambient Networks--Research for Communication Networks Beyond 3G ER - TY - CONF AU - Gross, James AU - Paoluzzi, Irene AU - Karl, Holger AU - Wolisz, Adam ID - 992 T2 - Vehicular Technology Conference, 2004. VTC 2004-Spring. 2004 IEEE 59th TI - Throughput study for a dynamic OFDM-FDMA system with inband signaling ER - TY - JOUR AU - Klimin, Nikolay AU - Enkelmann, Wilfried AU - Karl, Holger AU - Wolisz, Adam ID - 993 JF - Proc. of WIT TI - A hybrid approach for location-based service discovery in vehicular ad hoc networks ER - TY - CONF AU - Carlson, Emma AU - Karl, Holger AU - Wolisz, Adam AU - Prehofer, Christian ID - 997 T2 - Proc. European Wireless TI - Distributed allocation of time slots for real-time traffic in a wireless multi-hop network ER - TY - JOUR AU - Mengesha, Seble AU - Karl, Holger AU - Wolisz, Adam ID - 998 JF - Proc. of MedHocNet 2004 TI - Capacity increase of multi-hop cellular wlans exploiting data rate adaptation and frequency recycling ER - TY - JOUR AU - Hehenkamp, Burkhard AU - Leininger, W. AU - Possajennikov, A. ID - 4160 IS - 4 JF - European Journal of Political Economy SN - 0176-2680 TI - Evolutionary equilibrium in Tullock contests: spite and overdissipation VL - 20 ER - TY - JOUR AB - The adiabatic driving of the resonant electron dynamics in a one-dimensional resonant photonic band gap is proposed as an optical mechanism for nonlinear ultrafast switching. Pulsed excitation inside the photonic gap results in an ultrafast suppression and recovery of the gap. This behavior results from the adiabatic carrier dynamics due to rapid radiative damping inside the band gap. AU - Schaarschmidt, Martin AU - Förstner, Jens AU - Knorr, Andreas AU - Prineas, John P. AU - Nielsen, Nils C. AU - Kuhl, Jürgen AU - Khitrova, Galina AU - Gibbs, Hyatt M. AU - Giessen, Harald AU - Koch, Stephan W. ID - 4270 IS - 23 JF - Physical Review B KW - tet_topic_qw SN - 1098-0121 TI - Adiabatically driven electron dynamics in a resonant photonic band gap: Optical switching of a Bragg periodic semiconductor VL - 70 ER - TY - JOUR AB - We present a theory of the optical line shape of coherent intersubband transitions in a semiconductor quantum well, considering non-Markovian LO-phonon scattering as major broadening mechanism. We show that a quantum kinetic approach leads to additional polaron resonances and a resonance enhancement for gap energies close to the phonon energy. AU - Butscher, S. AU - Förstner, Jens AU - Waldmüller, I. AU - Knorr, A. ID - 4274 IS - 11 JF - physica status solidi (b) KW - tet_topic_qw SN - 0370-1972 TI - Polaron signatures in the line shape of semiconductor ;intersubband transitions: quantum kinetics of the electron–phonon interaction VL - 241 ER - TY - JOUR AB - We investigate the temporal and spectral properties of subpicosecond pulses transmitted on the heavy-hole exciton transition through a multiple-quantum-well Bragg structure, exhibiting a one-dimensional photonic band gap. At low light intensities, a temporal propagation beating is observed. This beating is strongly dependent on the optical dephasing time T2 which is dominated by the radiative interwell coupling. In an intermediate intensity regime, the Pauli-blocking nonlinearity leads to gradual suppression of the photonic band gap and vanishing of the linear propagation beating. For highly nonlinear excitation, we find signatures of selfinduced transmission due to Rabi flopping and adiabatic following of the carrier density. Numerical simulations using the semiconductor Maxwell-Bloch equations are in excellent agreement with the experimental data up to intensities for which higher many-particle correlations become more important and self-phase modulation occurs in the sample substrate. AU - Nielsen, N. C. AU - Kuhl, J. AU - Schaarschmidt, M. AU - Förstner, Jens AU - Knorr, A. AU - Koch, S. W. AU - Khitrova, G. AU - Gibbs, H. M. AU - Giessen, H. ID - 4277 IS - 7 JF - Physical Review B KW - tet_topic_qw SN - 1098-0121 TI - Linear and nonlinear pulse propagation in a multiple-quantum-well photonic crystal VL - 70 ER - TY - CONF AB - We demonstrate temporal and spatial pulse compression and modulational instabilities in the nonlinear defocusing regime near the band edge of bulk GaAs. Experiment and theory show that spatiotemporal coupling is responsible for these surprising phenomena. AU - Nielsen, Nils. C. AU - Siederdissen, Tilmann H. zu AU - Kuhl, Jürgen AU - Schaarschmidt, Martin AU - Förstner, Jens AU - Knorr, Andreas AU - Koch, Stephan W. AU - Giessen, Harald ID - 4279 KW - tet_topic_polariton SN - 3-54024-110-8 T2 - International Conference on Ultrafast Phenomena 2004 TI - Subpicosecond spatiotemporal pulse compression in a nonlinear defocusing material ER - TY - CONF AB - Theoretically and experimentally, we investigate temporal phase evolution during Rabi-flopping on the A-exciton resonance in CdSe using a novel fast-scanning XFROG method and observe phase changes smaller than π/2 compared to the slightly-chirped input pulse. AU - Höner zu Siederdissen, Tilman AU - Nielsen, Nils Christian. AU - Kuhl, Jürgen AU - Förstner, Jens AU - Knorr, Andreas AU - Giessen, Harald ID - 4280 KW - tet_topic_qd SN - 1-55752-770-9 T2 - International Quantum Electronics Conference and Photonic Applications Systems Technologies TI - Temporal phase evolution during excitonic Rabi flopping in semiconductors ER - TY - CONF AB - The coupled spatiotemporal characteristics of subpicosecond pulses propagating in the nonlinear defocusing regime near the band edge of bulk GaAs are investigated experimentally and theoretically. We demonstrate pulse compression both in time and transverse space. AU - Nielsen, Nils C. AU - Kuhl, Jürgen AU - Schaarschmidt, Martin AU - Förstner, Jens AU - Knorr, Andreas AU - Koch, Stephan W. AU - Giessen, Harald ID - 4281 KW - tet_topic_polariton SN - 1-55752-770-9 T2 - Conference on Lasers and Electro-Optics/International Quantum Electronics Conference and Photonic Applications Systems Technologies TI - Temporal and spatial compression of near-resonant pulses in a nonlinear defocusing semiconductor ER -