TY - CONF
AU - Mattern, Friedemann
AU - Karl, Holger
AU - Römer, Kay
ED - R{\"{o}}mer, Kay
ED - Karl, Holger
ED - Mattern, Friedemann
ID - 840
SN - 3-540-32158-6
T2 - Third European Workshop, {EWSN} 2006, Zurich, Switzerland, February 13-15, 2006, Proceedings
TI - Wireless Sensor Networks
ER -
TY - CONF
AU - Koehler, Jana
AU - Hauser, Rainer
AU - Küster, Jochen
AU - Ryndina, Ksenia
AU - Vanhatalo, Jussi
AU - Wahler, Michael
ID - 8408
T2 - Proceedings of the 5th International Workshop on Graph Transformation and Visual Modeling Techniques
TI - The Role of Visual Modeling and Model Transformations in Business-driven Development
VL - 211
ER -
TY - CONF
AU - Küster, Jochen
AU - Koehler, Jana
AU - Ryndina, Ksenia
ID - 8410
T2 - 2nd Workshop on Business Processes Design (BPD'06)
TI - Improving Business Process Models with Reference Models in Business-Driven Development
VL - 4103
ER -
TY - JOUR
AU - Knop, M.
AU - Wieser, U.
AU - Kunze, U.
AU - Reuter, Dirk
AU - Wieck, A. D.
ID - 8648
JF - Applied Physics Letters
SN - 0003-6951
TI - Ballistic rectification in an asymmetric mesoscopic cross junction
ER -
TY - JOUR
AU - Wilde, M. A.
AU - Schwarz, M. P.
AU - Heyn, Ch.
AU - Heitmann, D.
AU - Grundler, D.
AU - Reuter, Dirk
AU - Wieck, A. D.
ID - 8650
JF - Physical Review B
SN - 1098-0121
TI - Experimental evidence of the ideal de Haas–van Alphen effect in a two-dimensional system
ER -
TY - JOUR
AU - Greilich, A.
AU - Oulton, R.
AU - Zhukov, E. A.
AU - Yugova, I. A.
AU - Yakovlev, D. R.
AU - Bayer, M.
AU - Shabaev, A.
AU - Efros, Al. L.
AU - Merkulov, I. A.
AU - Stavarache, V.
AU - Reuter, Dirk
AU - Wieck, A.
ID - 8655
JF - Physical Review Letters
SN - 0031-9007
TI - Optical Control of Spin Coherence in Singly Charged(In,Ga)As/GaAsQuantum Dots
ER -
TY - JOUR
AU - Fricke, C.
AU - Regul, J.
AU - Hohls, F.
AU - Reuter, Dirk
AU - Wieck, A.D.
AU - Haug, R.J.
ID - 8662
JF - Physica E: Low-dimensional Systems and Nanostructures
SN - 1386-9477
TI - Transport spectroscopy of a quantum point contact created by an atomic force microscope
ER -
TY - JOUR
AB - The design of piezoelectric transducers is usually based on single-objective optimization only. In most practical applications of piezoelectric transducers, however, there exist multiple design objectives that often are contradictory to each other by their very nature. It is impossible to find a solution at which each objective function gets its optimal value simultaneously. Our design approach is to first find a set of Pareto-optimal solutions, which can be considered to be best compromises among multiple design objectives. Among these Pareto-optimal solutions, the designer can then select the one solution which he considers to be the best one. In this paper we investigate the optimal design of a Langevin transducer. The design problem is formulated mathematically as a constrained multiobjective optimization problem. The maximum vibration amplitude and the minimum electrical input power are considered as optimization objectives. Design variables involve continuous variables (dimensions of the transducer) and discrete variables (the number of piezoelectric rings and material types). In order to formulate the optimization problem, the behavior of piezoelectric transducers is modeled using the transfer matrix method based on analytical models. Multiobjective evolutionary algorithms are applied in the optimization process and a set of Pareto-optimal designs is calculated. The optimized results are analyzed and the preferred design is determined.
AU - Fu, Bo
AU - Hemsel, Tobias
AU - Wallaschek, Jörg
ID - 9533
JF - Ultrasonics
KW - Piezoelectric transducer
SN - 0041-624X
TI - Piezoelectric transducer design via multiobjective optimization
VL - 44, Supplement
ER -
TY - CONF
AU - Hemsel, Tobias
AU - Mracek, Maik
ID - 9538
IS - Band 180
T2 - Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators
TI - Control of Bundled Miniature Ultrasonic Linear Motors
ER -
TY - CONF
AU - Hemsel, Tobias
AU - Priya, S
ID - 9540
IS - Band 180
T2 - Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators
TI - Model Based Analysis of Piezoelectric Transformers
ER -
TY - CONF
AU - Mracek, B
AU - Hemsel, Tobias
AU - Mracek, Maik
ID - 9545
IS - Band 180
T2 - Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators
TI - Powder Transport by Ultrasonic Waves
ER -
TY - CONF
AU - Twiefel, Jens
AU - Hemsel, Tobias
AU - Kauczor, Christopher
ID - 9552
IS - Band 180
T2 - Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators
TI - Energy harvesting with piezoelectric Elements
ER -
TY - CHAP
AU - Peckhaus, Volker
AU - Löwe, Benedikt
AU - Räsch, Thoralf
ED - Peckhaus, Volker
ED - Löwe, Benedikt
ED - Räsch, Thoralf
ID - 17584
T2 - Foundations of Formal Sciences IV. The History of the Concept of Formal Sciences
TI - Preface
VL - 3
ER -
TY - CONF
AU - Wrede, Britta
AU - Rohlfing, Katharina
AU - Nagai, Yukie
ID - 17286
T2 - 5th Biennial International Conference on Infant Studies (ICIS 2006)
TI - How to make sense of environmental interaction and dynamics. Symposium: Models of infant development: Are we really serious about environmental interaction and dynamics?
ER -
TY - GEN
AU - Peckhaus, Volker
ID - 18544
T2 - Zentralblatt für Mathematik und ihre Grenzgebiete [Zbl. 1087.01017]
TI - Bolzano, Bernard, Vermischte Mathematische Schriften 1832–1848, Teil 1, hg. v. Jan Berg (Bernard-Bolzano-Gesamtausgabe, R. II.A.11.1), Friedrich Frommann Verlag-Günther Holzboog: Stuttgart-Bad Cannstatt 2001
ER -
TY - GEN
AU - Peckhaus, Volker
ID - 18556
T2 - Zentralblatt für Mathematik und ihre Grenzgebiete [Zbl 1096.03001]
TI - Floyd, Juliet/Shieh, Sanford (Hgg.), Future Pasts. The Analytic Tradition in Twentieth-Century Philosophy. Dedicated to Burton Dreben, Oxford University Press: Oxford 2001
ER -
TY - JOUR
AB - This paper investigates the influence of the basis set on the GW self-energy correction in the full-potential linearized augmented-plane-wave (LAPW) approach and similar linearized all-electron methods. A systematic improvement is achieved by including local orbitals that are defined as second and higher energy derivatives of solutions to the radial scalar-relativistic Dirac equation and thus constitute a natural extension of the LAPW basis set. Within this approach linearization errors can be eliminated, and the basis set becomes complete. While the exchange contribution to the self-energy is little affected by the increased basis-set flexibility, the correlation contribution benefits from the better description of the unoccupied states, as do the quasiparticle energies. The resulting band gaps remain relatively unaffected, however; for Si we find an increase of 0.03 eV.
AU - Friedrich, Christoph
AU - Schindlmayr, Arno
AU - Blügel, Stefan
AU - Kotani, Takao
ID - 18599
IS - 4
JF - Physical Review B
SN - 1098-0121
TI - Elimination of the linearization error in GW calculations based on the linearized augmented-plane-wave method
VL - 74
ER -
TY - CONF
AB - We present random sampling algorithms that with probability at least 1 - δ compute a (1 ± ǫ)- approximation of the clustering coefficient, the transitiv ity coefficient, and of the number of bipartite cliques in a graph given as a stream of edges. Our methods can be extended to approximately count the number of occurences of fixed constant-size subgraphs. Our a lgorithms only require one pass over the input stream and their storage space depends only on structural parameters of the graphs, the approxi- mation guarantee, and the confidence probability. For examp le, the algorithms to compute the clustering and transitivity coefficient depend on that coefficient but n ot on the size of the graph. Since many large social networks have small clustering and transitivity coe fficient, our algorithms use space independent of the size of the input for these graphs. We implemented our algorithms and evaluated their performance on networks from different appli- cation domains. The sizes of the considered input graphs varied from about 8, 000 nodes and 40, 000 edges to about 135 million nodes and more than 1 billion edges. For both algorithms we run experiments with a sample set size varying from 100, 000 to 1, 000, 000 to evaluate running time and approximation guarantee. Our algorithms appear to be time efficient for the se sample sizes.
AU - Sohler, Christian
AU - Frahling, Gereon
AU - Marchetti-Spaccamela, Alberto
AU - Leonardi, Stefano
AU - Buriol, Luciana
ID - 18676
T2 - Proceedings of the European Conference on Complex Systems (ECCS'06)
TI - Computing Clustering Coefficients in Data Streams
ER -
TY - CONF
AB - In this paper, we present a randomized constant factor approximation
algorithm for the metric minimum facility location problem with uniform
costs and demands in a distributed setting, in which every point can
open a facility. In particular, our distributed algorithm uses three
communication rounds with message sizes bounded to O(log n) bits where
n is the number of points. We also extend our algorithm to constant
powers of metric spaces, where we also obtain a randomized constant
factor approximation algorithm.
AU - Sohler, Christian
AU - Gehweiler, Joachim
AU - Lammersen, Christiane
ID - 18746
T2 - Proceeedings of 18th ACM Symposium on Parallelism in Algorithms and Architectures (SPAA)
TI - A Distributed O(1)-Approximation Algorithm for the Uniform Facility Location Problem
ER -
TY - GEN
AU - Peckhaus, Volker
ID - 18816
T2 - Mathematical Reviews [MR 2006b:03008; MathSciNet MR2139368]
TI - Martin, Donald A., “Gödel’s Conceptual Realism”, Bulletin of Symbolic Logic 11 (2005), 207–224
ER -