Institution
Leibniz University of Hanover
Education•Hanover, Niedersachsen, Germany•
About: Leibniz University of Hanover is a education organization based out in Hanover, Niedersachsen, Germany. It is known for research contribution in the topics: Finite element method & Population. The organization has 14283 authors who have published 29845 publications receiving 682152 citations.
Topics: Finite element method, Population, Laser, Gravitational wave, Membrane
Papers published on a yearly basis
Papers
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TL;DR: Erhard et al. as discussed by the authors showed that the combined errors in an approximate joint measurement of a pair of observables are tightly bounded from below by a quantity that measures the degree of incompatibility of $A$ and $B$.
Abstract: Reports on experiments recently performed in Vienna [Erhard et al., Nature Phys. 8, 185 (2012)] and Toronto [Rozema et al., Phys. Rev. Lett. 109, 100404 (2012)] include claims of a violation of Heisenberg's error-disturbance relation. In contrast, we have presented and proven a Heisenberg-type relation for joint measurements of position and momentum [Phys. Rev. Lett. 111, 160405 (2013)]. To resolve the apparent conflict, we formulate here a general trade-off relation for errors in qubit measurements, using the same concepts as we did in the position-momentum case. We show that the combined errors in an approximate joint measurement of a pair of $\ifmmode\pm\else\textpm\fi{}1$-valued observables $A,B$ are tightly bounded from below by a quantity that measures the degree of incompatibility of $A$ and $B$. The claim of a violation of Heisenberg is shown to fail because it is based on unsuitable measures of error and disturbance. Finally we show how the experiments mentioned may directly be used to test our error inequality.
126 citations
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TL;DR: This paper examined whether consumer confidence -as a proxy for individual investor sentiment - affects expected stock returns internationally in 18 industrialized countries and found that sentiment negatively forecasts aggregate stock market returns on average across countries, when sentiment is high, future stock returns tend to be lower and vice versa.
Abstract: We examine whether consumer confidence - as a proxy for individual investor sentiment - affects expected stock returns internationally in 18 industrialized countries. In line with recent evidence for the U.S., we find that sentiment negatively forecasts aggregate stock market returns on average across countries. When sentiment is high, future stock returns tend to be lower and vice versa. This relation also holds for returns of value stocks, growth stocks, small stocks, and for different forecasting horizons. Finally, we employ a cross-sectional perspective and provide evidence that the impact of sentiment on stock returns is higher for countries which have less market integrity and which are culturally more prone to herd-like behavior and overreaction.
125 citations
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TL;DR: In this article, a concurrent two-scale and two-method approach for modeling the mechanical behavior of dry frictional non-cohesive granular materials is presented, where the material is modeled on the grain scale using a three-dimensional discrete element method and the remaining domain is considered continuous and modeled by the finite element method using an elastoplastic constitutive equation whose parameters are fit to the particle model via a homogenization scheme.
125 citations
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TL;DR: In this article, it was shown that the algebra obtained from an algebraically consistent dimer model is a 3-dimensional Calabi-Yau algebra and that this gives a non-commutative crepant resolution of the Gorenstein affine toric threefold associated to the Dimer model.
Abstract: In this article we study dimer models, as introduced in string theory, which give a way of writing down a class of non-commutative `superpotential' algebras. Some examples are 3-dimensional Calabi-Yau algebras, as defined by Ginzburg, and some are not. We consider two types of `consistency' condition on dimer models, and show that a `geometrically consistent' model is `algebraically consistent'. We prove that the algebra obtained from an algebraically consistent dimer model is a 3-dimensional Calabi-Yau algebra and finally prove that this gives a non-commutative crepant resolution of the Gorenstein affine toric threefold associated to the dimer model.
125 citations
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09 Nov 2010TL;DR: Data from the famous collaborative OpenStreetMap (OSM) mapping project are used and are integrated for the first time into the robot tasks of localization, path planning and autonomous vehicle control.
Abstract: This paper introduces the appliance of standardized, free to use and globally available geodata for autonomous robot navigation. For this, data from the famous collaborative OpenStreetMap (OSM) mapping project are used. These geodata are public domain and include rich information about streets, tracks, railways, waterways, points of interest, land use, building information and much more. Beyond the spatial information, the geodata contain detailed information about the name, type and width of the streets as well as public speed limits. As a contribution of this paper, the OSM data are integrated for the first time into the robot tasks of localization, path planning and autonomous vehicle control. Following the description of the approach, experimental results in outdoor environments demonstrate the effectiveness of this approach.
125 citations
Authors
Showing all 14621 results
Name | H-index | Papers | Citations |
---|---|---|---|
Hyun-Chul Kim | 176 | 4076 | 183227 |
Peter Zoller | 134 | 734 | 76093 |
J. R. Smith | 134 | 1335 | 107641 |
Chao Zhang | 127 | 3119 | 84711 |
Benjamin William Allen | 124 | 807 | 87750 |
J. F. J. van den Brand | 123 | 777 | 93070 |
J. H. Hough | 117 | 904 | 89697 |
Hans-Peter Seidel | 112 | 1213 | 51080 |
Karsten Danzmann | 112 | 754 | 80032 |
Bruce D. Hammock | 111 | 1409 | 57401 |
Benno Willke | 109 | 508 | 74673 |
Roman Schnabel | 108 | 589 | 71938 |
Jan Harms | 108 | 447 | 76132 |
Hartmut Grote | 108 | 434 | 72781 |
Ik Siong Heng | 107 | 423 | 71830 |