Results 11 to 20 of about 1,147,152 (263)
Geosciences, 2023 The present work is aimed at assessing the change in time of flood risk as a consequence of landscape modifications. The town of San Donà di Piave (Italy) is taken as a representative case study because, as most parts of the North Italy floodplains, it ...
Tommaso Lazzarin +2 more
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Time-Optimal Quantum Evolution [PDF]
Physical Review Letters, 2006 We present a general framework for finding the time-optimal evolution and the optimal Hamiltonian for a quantum system with a given set of initial and final states. Our formulation is based on the variational principle and is analogous to that for the brachistochrone in classical mechanics. We reduce the problem to a formal equation for the Hamiltonian
CARLINI, ALBERTO +3 more
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There’s plenty of time for evolution [PDF]
Proceedings of the National Academy of Sciences, 2010 Objections to Darwinian evolution are often based on the time required to carry out the necessary mutations. Seemingly, exponential numbers of mutations are needed. We show that such estimates ignore the effects of natural selection, and that the numbers of necessary mutations are thereby reduced to about K
Wilf, Herbert S., Ewens, Warren J.
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Visco-Da Rios Equation in 3-Dimensional Riemannian Manifold
Frontiers in Physics, 2022 In this paper, we study two classes of a space curve evolution in terms of Frenet frame for the visco-Da Rios equation in a 3-dimensional Riemannain manifold.
Nevin Ertuğ Gürbüz, Dae Won Yoon
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Shannon (Information) Measures of Symmetry for 1D and 2D Shapes and Patterns
Applied Sciences, 2022 In this paper, informational (Shannon) measures of symmetry are introduced and analyzed for patterns built of 1D and 2D shapes. The informational measure of symmetry Hsym(G) characterizes the averaged uncertainty in the presence of symmetry elements from
Edward Bormashenko +4 more
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The Biased Evolution of Generation Time [PDF]
The American Naturalist, 2017 Now we also study the evolution of development duration, suggesting that turnover bias is involved in the evolutionary dynamics of any trait linked with the generation ...
Verin, Mélissa +3 more
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The Evolution of the Cover Time
Combinatorics, Probability and Computing, 2011 The cover time of a graph is a celebrated example of a parameter that is easy to approximate using a randomized algorithm, but for which no constant factor deterministic polynomial time approximation is known. A breakthrough due to Kahn, Kim, Lovász and Vu [25] yielded a (log logn)2polynomial time approximation.
Martin T. Barlow +3 more
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Desempenho recente do mercado de trabalho brasileiro: 1992-2005
Brazilian Journal of Political Economy, 2009 Recent behavior of the Brazilian labor market: 1992-2005. This study aims at describing the behavior of the Brazilian labor market between 1992 and 2005.
Lauro Ramos
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Atoms, 2020 The guiding of highly charged ions through a single nanocapillary is simulated in comparison with previous experiments performed with highly insulating polyethylene terephthalate (PET).
Nikolaus Stolterfoht
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Human Milk Microbiome and Maternal Postnatal Psychosocial Distress
Frontiers in Microbiology, 2019 Human milk contains many bioactive components, including bacteria, which are transferred to the developing infant through breastfeeding. Milk bacteria appear to, amongst others, originate from the maternal gut.
Pamela D. Browne +8 more
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