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: The systematic removal of noisy data from analysis time is shown to improve the sensitivity of searches for compact binary coalescences, and the output of the PyCBC pipeline is used as a metric for improvement.
Abstract: The first observing run of Advanced LIGO spanned 4 months, from 12 September 2015 to 19 January 2016, during which gravitational waves were directly detected from two binary black hole systems, namely GW150914 and GW151226. Confident detection of gravitational waves requires an understanding of instrumental transients and artifacts that can reduce the sensitivity of a search. Studies of the quality of the detector data yield insights into the cause of instrumental artifacts and data quality vetoes specific to a search are produced to mitigate the effects of problematic data. In this paper, the systematic removal of noisy data from analysis time is shown to improve the sensitivity of searches for compact binary coalescences. The output of the PyCBC pipeline, which is a python-based code package used to search for gravitational wave signals from compact binary coalescences, is used as a metric for improvement. GW150914 was a loud enough signal that removing noisy data did not improve its significance. However, the removal of data with excess noise decreased the false alarm rate of GW151226 by more than two orders of magnitude, from 1 in 770 yr to less than 1 in 186 000 yr.
124 citations
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TL;DR: In this paper, a finite-element mesh at micrometer length scale is introduced based upon a three-dimensional computer-tomography of hardened cement paste, effective material properties are obtained through numerical homogenization techniques using representative volume elements.
Abstract: Based upon a three-dimensional computer-tomography of hardened cement paste, a finite-element mesh at micrometer length scale is introduced. Effective material properties are obtained through numerical homogenization techniques using representative volume elements. Statistical tests, two- and three-dimensional computations and a comparison with experimental data are shown. For the hydration products of hardened cement paste a visco-plastic constitutive equation of Perzyna type including isotropic damage is introduced. The inelastic material parameters are identified solving an optimization problem through a combination of a stochastic genetic algorithm and the deterministic Levenberg-Marquardt method. The time-consuming evaluations of the corresponding objective function are distributed within a network environment automatically.
124 citations
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TL;DR: The effects of psychological stress and the Valsalva maneuver on short-term variations of intraocular pressure (IOP) were studied in 49 healthy adults and regular physical exercise was associated with less IOP increase during psychological stress.
124 citations
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TL;DR: The 3% WO3-TiO2 nanocomposite is considered to be the optimum photocatalyst which is able to degrade completely (100% conversion) of imazapyr herbicide along 120min with high photonic efficiency ∼8%.
124 citations
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TL;DR: The materials investigated serve as model systems to unravel the interesting features of the SAE NMR spectroscopy technique in determining reliable Li jump rates and hopping activation energies, and are compared with those probed by macroscopic techniques such as dc-conductivity measurements that are sensitive to long-range translational motions.
Abstract: The development of highly conductive solids is a rapidly growing research area in materials science. In particular, the study of Li-ion conductors is driven by the ambitious effort to design powerful lithium-ion batteries. A deeper understanding of Li dynamics in solids requires the availability of a large set of complementary techniques to probe Li self-diffusion on different length and time-scales. We report on (7)Li as well as (6)Li spin-alignment echo (SAE) nuclear magnetic resonance (NMR) spectroscopy, which is capable of probing long-range diffusion parameters from a microscopic, that is, atomic-scale, point of view. So far, variable-temperature SAE NMR spectroscopy has been applied to a number of polycrystalline and glassy Li-ion conductors. The materials investigated serve as model systems to unravel the interesting features of the technique in determining reliable Li jump rates and hopping activation energies. In particular, the latter are compared with those probed by macroscopic techniques such as dc-conductivity measurements that are sensitive to long-range translational motions.
124 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 |