TY - JOUR
AU - Greilich, A.
AU - Shabaev, A.
AU - Yakovlev, D. R.
AU - Efros, Al. L.
AU - Yugova, I. A.
AU - Reuter, Dirk
AU - Wieck, A. D.
AU - Bayer, M.
ID - 8633
JF - Science
SN - 0036-8075
TI - Nuclei-Induced Frequency Focusing of Electron Spin Coherence
ER -
TY - JOUR
AU - GÜRTLER, A.
AU - ZEITLER, U.
AU - MAAN, J. C.
AU - Reuter, Dirk
AU - WIECK, A. D.
ID - 8640
JF - International Journal of Modern Physics B
SN - 0217-9792
TI - CYCLOTRON RESONANCE IN COUPLED BILAYERS IN HIGH MAGNETIC FIELDS
ER -
TY - JOUR
AU - Blokland, J. H.
AU - Wijnen, F. J. P.
AU - Christianen, P. C. M.
AU - Zeitler, U.
AU - Maan, J. C.
AU - Kailuweit, P.
AU - Reuter, Dirk
AU - Wieck, A. D.
ID - 8645
JF - Physical Review B
SN - 1098-0121
TI - Hole levels in InAs self-assembled quantum dots
ER -
TY - CONF
AU - Tonchev, Anton
AU - Hirschberg, Wolfgang
AU - Sextro, Walter
AU - Major, Zoltan
AU - Neges, Josef
ID - 9561
IS - 657
T2 - 27. Internationales Mju-Symposium/Bremsen-Fachtagung
TI - Modelling of Hysteresis and Adhesion Effects between Brake Pad and Disc
ER -
TY - JOUR
AU - Shigematsu , Takashi
AU - Morita, Takeshi
AU - Hemsel, Tobias
ID - 9566
JF - Proceedings of Symposium on Ultrasonic Electronics
TI - Fundamental Study on A Thickness-Shear Transformer using X-Cut Lithium Niobate
VL - 28
ER -
TY - CHAP
AU - Beutner, Marc
ED - Antor, H
ID - 9592
T2 - Fremde Kulturen verstehen – fremde Kulturen lehren. Theorie und Praxis der Vermittlung interkultureller Kompetenz
TI - Die Förderung interkulturellen Verständnis in der beruflichen Bildung
ER -
TY - CHAP
AU - Preis, Robert
AU - Monien, Burkhard
AU - Schamberger, Stefan
ID - 16658
SN - 2154-4573
T2 - Handbook of Approximation Algorithms and Metaheuristics
TI - Approximation Algorithms for Multilevel Graph Partitioning
ER -
TY - JOUR
AU - Alewell, Dorothea
AU - Bähring, Katrin
AU - Canis, Anne
AU - Hauff, Sven
AU - Thommes, Kirsten
ID - 4984
IS - 3
JF - Management Revue
SN - 1861-9916
TI - Outsourcing HR functions. Development of an explanatory approach to firms'(non-existent) demand for personnel services
VL - 18
ER -
TY - CONF
AU - Brennecke, Andreas
AU - Finke, Stefan
AU - König, J.
AU - Oevel, Gudrun
ID - 17315
T2 - Konferenzband der 20. DFN-Jahrestagung DFN2006
TI - Flexible dezentrale Administration überschneidender Benutzergruppen – Informationelle Selbstbestimmung durch benutzerkontrollierte Provisionierung
ER -
TY - JOUR
AU - Leonardi, Stefano
AU - Mahlmann, Peter
AU - Meyer auf der Heide, Friedhelm
AU - Spirakis, Paul G.
AU - Weikum, Gerhard
ID - 17567
JF - e-Strategies, www.britishpublishers.com
TI - Guarding our digital society's well-being
VL - 3-10-2007
ER -
TY - JOUR
AU - Peckhaus, Volker
ID - 17593
IS - 5
JF - Der Mathematikunterricht
TI - Mathematik und Philosophie. Einführung
VL - 53
ER -
TY - BOOK
ED - Peckhaus, Volker
ID - 17461
SN - 0025-5807
TI - Der Mathematikunterricht 53, H. 5: Schwerpunkt: Philosophie und Mathematik
ER -
TY - CHAP
AU - Mindt, Ilka
ED - Herbst, Thomas
ED - Götz-Votteler, Katrin
ID - 17846
T2 - Valency. Theoretical, Descriptive and Cognitive Issues
TI - The valency of experiential and evaluative adjectives
ER -
TY - CONF
AB - This paper presents a new insight from a computational analysis of parental actions. Developmental behavioral studies have suggested that parental modifications in their actions directed to infants versus to adults may aid the infants’ processing of the actions. We have been analyzing parental actions using a bottom-up attention model so as to take the advantage in robot action learning. Our latest result indicates that parental social signals can be used for a robot to detect significant state changes in the demonstrated action.
AU - Nagai, Yukie
AU - Rohlfing, Katharina
ID - 17283
T2 - The 7th International Conference on Epigenetic Robotics
TI - Parental Signal Indicating Significant State Change in Action Demonstration
ER -
TY - JOUR
AU - Ziegler, Martin
ID - 17980
JF - Electronic Notes in Theoretical Computer Science
SN - 1571-0661
TI - Revising Type-2 Computation and Degrees of Discontinuity
ER -
TY - CONF
AB - We present random sampling algorithms that with probability at least 1 − δ compute a (1 ±ε)-approximation of the clustering coefficient and of the number of bipartite clique subgraphs of a graph given as an incidence stream of edges. The space used by our algorithm to estimate the clustering coefficient is inversely related to the clustering coefficient of the network itself. The space used by our algorithm to compute the number K 3,3 of bipartite cliques is proportional to the ratio between the number of K 1,3 and K 3,3 in the graph.
Since the space complexity depends only on the structure of the input graph and not on the number of nodes, our algorithms scale very well with increasing graph size. Therefore they provide a basic tool to analyze the structure of dense clusters in large graphs and have many applications in the discovery of web communities, the analysis of the structure of large social networks and the probing of frequent patterns in large graphs.
We implemented both algorithms and evaluated their performance on networks from different application domains and of different size; The largest instance is a webgraph consisting of more than 135 million nodes and 1 billion edges. Both algorithms compute accurate results in reasonable time on the tested instances.
AU - Buriol, Luciana S.
AU - Frahling, Gereon
AU - Leonardi, Stefano
AU - Sohler, Christian
ID - 18572
SN - 9783540755197
T2 - Proceedings of the 15th European Symposium on Algorithms (ESA)
TI - Estimating Clustering Indexes in Data Streams
VL - 4698
ER -
TY - JOUR
AB - For the calculation of neutral excitations, time-dependent density functional theory (TDDFT) is an exact reformulation of the many-body time-dependent Schrödinger equation, based on knowledge of the density instead of the many-body wavefunction. The density can be determined in an efficient scheme by solving one-particle non-interacting Schrödinger equations—the Kohn–Sham equations. The complication of the problem is hidden in the—unknown—time-dependent exchange and correlation potential that appears in the Kohn–Sham equations and for which it is essential to find good approximations. Many approximations have been suggested and tested for finite systems, where even the very simple adiabatic local-density approximation (ALDA) has often proved to be successful. In the case of solids, ALDA fails to reproduce optical absorption spectra, which are instead well described by solving the Bethe–Salpeter equation of many-body perturbation theory (MBPT). On the other hand, ALDA can lead to excellent results for loss functions (at vanishing and finite momentum transfer). In view of this and thanks to recent successful developments of improved linear-response kernels derived from MBPT, TDDFT is today considered a promising alternative to MBPT for the calculation of electronic spectra, even for solids. After reviewing the fundamentals of TDDFT within linear response, we discuss different approaches and a variety of applications to extended systems.
AU - Botti, Silvana
AU - Schindlmayr, Arno
AU - Del Sole, Rodolfo
AU - Reining, Lucia
ID - 18589
IS - 3
JF - Reports on Progress in Physics
SN - 0034-4885
TI - Time-dependent density-functional theory for extended systems
VL - 70
ER -
TY - JOUR
AB - Using density-functional theory, we investigate the stability of the half-metallic ground state of magnetite under different strain conditions. The effects of volume relaxation and internal degrees of freedom are fully taken into account. For hydrostatic compression, planar strain in the (001) plane and uniaxial strain along the [001] direction, we derive quantitative limits beyond which magnetite becomes metallic. As a major new result, we identify the bond length between the octahedrally coordinated iron atoms and their neighbouring oxygen atoms as the main characteristic parameter, and we show that the transition occurs if external strain reduces this interatomic distance from 2.06 Å in equilibrium to below a critical value of 1.99 Å. Based on this criterion, we also argue that planar strain due to epitaxial growth does not lead to a metallic state for magnetite films grown on (111)-oriented substrates.
AU - Friák, Martin
AU - Schindlmayr, Arno
AU - Scheffler, Matthias
ID - 18591
IS - 1
JF - New Journal of Physics
SN - 0034-4885
TI - Ab initio study of the half-metal to metal transition in strained magnetite
VL - 9
ER -
TY - GEN
AU - Peckhaus, Volker
ID - 18642
T2 - Zentralblatt für Mathematik und ihre Grenzgebiete [Zbl. 1110.01009]
TI - Kushner, Boris A., “The Constructive Mathematics of A.A. Markov”, American Mathematical Monthly 113 (2006), 559–566
ER -
TY - GEN
AU - Peckhaus, Volker
ID - 18647
T2 - Zentralblatt für Mathematik und ihre Grenzgebiete [Zbl. 1122.00009]
TI - Visser, Henk, “Transpositions”, in: Johan van Benthem (Hg.), The Age of Alternative Logics. Assessing Philosophy of Logic and Mathematics Today. Based on the Conference on Philosophical Insights into Logic and Mathematics, Nancy, France, September 30–October 4, 2002, Dordrecht: Springer 2006, 75–86
ER -