Results 41 to 50 of about 2,912,298 (341)

Nonlinear Relaxation in Population Dynamics

, 2001
We analyze the nonlinear relaxation of a complex ecosystem composed of many interacting species. The ecological system is described by generalized Lotka-Volterra equations with a multiplicative noise. The transient dynamics is studied in the framework of
Cirone, M. A., de Pasquale, F., Spagnolo, B.   +2 more
core   +1 more source

Particle Statistics and Population Dynamics

, 2004
We study a master equation system modelling a population dynamics problem in a lattice. The problem is the calculation of the minimum size of a refuge that can protect a population from hostile external conditions, the so called critical patch size ...
Alcaraz, Cardy, Carlos Escudero, Doering, Doi, Escudero, Frensley, Goel, Hernández-García, Ludwig, McClintock, Mobilia, Mobilia, Mobilia, Murray, Oppenheim, Shaffer, Skellam, Sznajd-Weron, Sznajd-Weron   +19 more
core   +2 more sources

Inequalities in lifespan and mortality risk in the US, 2015–2019: a cross-sectional analysis of subpopulations by social determinants of health

BMJ Open
Objective To quantify inequalities in lifespan across multiple social determinants of health, how they act in tandem with one another, and to create a scoring system that can accurately identify subgroups of the population at high risk of mortality ...
Marie-Pier Bergeron-Boucher, Julia Callaway, Cosmo Strozza, Jim Oeppen   +3 more
doaj   +1 more source

Annealing schedule from population dynamics

, 1999
We introduce a dynamical annealing schedule for population-based optimization algorithms with mutation. On the basis of a statistical mechanics formulation of the population dynamics, the mutation rate adapts to a value maximizing expected rewards at ...
A. Prügel-Bennett, A. Prügel-Bennett, D. B. Fogel, E. Aarts, F. Starrost, I. Rechenberg, J. H. Holland, J. L. Shapiro, L. M. Rattray, M. Mitchell, P. Stadler, P. Sutton, S. Bornholdt, S. Kauffman, S. Kauffman, Stefan Bornholdt   +15 more
core   +1 more source

Migration Dynamics for the Ideal Free Distribution [PDF]

, 2006
This article verifies that the ideal free distribution (IFD) is evolutionarily stable, provided the payoff in each patch decreases with an increasing number of individuals.
Cressman, Ross, Křivan, Vlastimil
core   +2 more sources

Population dynamics in compressible flows

, 2012
Organisms often grow, migrate and compete in liquid environments, as well as on solid surfaces. However, relatively little is known about what happens when competing species are mixed and compressed by fluid turbulence.
A. Kolmogorov, A. Kolmogorov, A. Kurganov, A. Martin, A.P. Martin, A.R. Robinson, A.R. Robinson, C. Torney, D. R. Nelson, D.R. Nelson, F. D’Ovidio, F. Peters, F. Toschi, F. Toschi, G. Boffetta, G. Boffetta, G. Falkovich, I.M. Held, J. Bec, J. Bec, J. Bec, J. ichi Wakita, J. Mannik, J.R. Cressman, K. Korolev, K. Mizobota, K.A. Dahmen, L. Biferale, L. Thomas, M. H. Jensen, M. Kimura, N.M. Shnerb, O. Hallatschek, O. Hallatschek, O. Hallatschek, P. Klein, P. Klein, P. Perlekar, P. Perlekar, R. Benzi, R. Benzi, R. Benzi, R. Fisher, S. Berti, S. Pigolotti, T. Neicu, T. Tel, W. McKiver, W. Saarloos van, W.J. McKiver, W.M. Durham, X. Capet   +51 more
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Coevolutionary Dynamics: From Finite to Infinite Populations [PDF]

, 2005
Traditionally, frequency dependent evolutionary dynamics is described by deterministic replicator dynamics assuming implicitly infinite population sizes.
Arne Traulsen, Christoph Hauert, H. Gintis, H. G. Schuster, J. Hofbauer, J. Maynard Smith, J. Weibull, Jens Christian Claussen, N. G. van Kampen, P. A. P. Moran, R. Axelrod, R. Dawkins, R. A. Fisher, S. Karlin, S. Wright   +14 more
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Preferences of Pediatric Patients and Their Caregivers for Chemotherapy‐Induced Nausea and Vomiting Control Endpoints: A Mixed Methods Study

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Purpose Although not always achieved, complete chemotherapy‐induced nausea and vomiting (CINV) control is the conventional goal of CINV prophylaxis. In this two‐center, mixed‐methods study, we sought to understand the preferences of adolescent patients and family caregivers for CINV control endpoints.
Haley Newman, Tadi Hondonga, Alison Berry, Caitlin Elgarten, Jason Freedman, Katelyn Oranges, Sara McDonough, Caroline Diorio, L. Lee Dupuis   +8 more
wiley   +1 more source

Modeling Best Practice Life Expectancy Using Gumbel Autoregressive Models

Risks, 2021
Best practice life expectancy has recently been modeled using extreme value theory. In this paper we present the Gumbel autoregressive model of order one—Gumbel AR(1)—as an option for modeling best practice life expectancy. This class of model represents
Anthony Medford
doaj   +1 more source

Evolutionary dynamics on any population structure

, 2016
Evolution occurs in populations of reproducing individuals. The structure of a biological population affects which traits evolve. Understanding evolutionary game dynamics in structured populations is difficult. Precise results have been absent for a long
Allen, Benjamin, Chen, Yu-Ting, Fotouhi, Babak, Lippner, Gabor, Momeni, Naghmeh, Nowak, Martin A., Yau, Shing-Tung   +6 more
core   +2 more sources