Zobrazeno 1 - 10
of 66
pro vyhledávání: '"Szendro, Ivan G."'
Publikováno v:
Phys. Rev. E 91, 042707 (2015)
We study biological evolution on a random fitness landscape where correlations are introduced through a linear fitness gradient of strength $c$. When selection is strong and mutations rare the dynamics is a directed uphill walk that terminates at a l
Externí odkaz:
http://arxiv.org/abs/1408.4856
Publikováno v:
PLoS Computational Biology 10(9): e1003836 (2014)
Identifying and quantifying the benefits of sex and recombination is a long standing problem in evolutionary theory. In particular, contradictory claims have been made about the existence of a benefit of recombination on high dimensional fitness land
Externí odkaz:
http://arxiv.org/abs/1403.6406
Publikováno v:
Genetics 198: 699-721 (2014)
Much of the current theory of adaptation is based on Gillespie's mutational landscape model (MLM), which assumes that the fitness values of genotypes linked by single mutational steps are independent random variables. On the other hand, a growing bod
Externí odkaz:
http://arxiv.org/abs/1402.3065
Publikováno v:
J. Theor. Biol. 332 (2013) 218-227
Starting from fitness correlation functions, we calculate exact expressions for the amplitude spectra of fitness landscapes as defined by P.F. Stadler [J. Math. Chem. 20, 1 (1996)] for common landscape models, including Kauffman's NK-model, rough Mou
Externí odkaz:
http://arxiv.org/abs/1301.1923
Autor:
Szendro, Ivan G., Schenk, Martijn F., Franke, Jasper, Krug, Joachim, de Visser, J. Arjan G. M.
Publikováno v:
J. Stat. Mech. P01005 (2013)
The concept of a fitness landscape is a powerful metaphor that offers insight into various aspects of evolutionary processes and guidance for the study of evolution. Until recently, empirical evidence on the ruggedness of these landscapes was lacking
Externí odkaz:
http://arxiv.org/abs/1202.4378
Autor:
Bröcker, Jochen, Szendro, Ivan G.
Data assimilation refers to the problem of finding trajectories of a prescribed dynamical model in such a way that the output of the model (usually some function of the model states) follows a given time series of observations. Typically though, thes
Externí odkaz:
http://arxiv.org/abs/1108.5756
Publikováno v:
Physical Review Letters 106 (2011) 088101
We study the evolution of a population in a two-locus genotype space, in which the negative effects of two single mutations are overcompensated in a high fitness double mutant. We discuss how the interplay of finite population size, $N$, and sexual r
Externí odkaz:
http://arxiv.org/abs/1012.1808
Publikováno v:
Chemical Physics 375 (2-3), 370-377 (2010)
In systems with weak ergodicity breaking, the equivalence of time averages and ensemble averages is known to be broken. We study here the computation of the power spectrum from realizations of a specific process exhibiting 1/f^beta noise, the Rebensh
Externí odkaz:
http://arxiv.org/abs/1002.0993
Publikováno v:
Phys. Rev. E 78, 016209 (2008)
We study Lyapunov vectors (LVs) corresponding to the largest Lyapunov exponents in systems with spatiotemporal chaos. We focus on characteristic LVs and compare the results with backward LVs obtained via successive Gram-Schmidt orthonormalizations. S
Externí odkaz:
http://arxiv.org/abs/0808.0432
We study the time evolution of perturbations in spatially extended chaotic systems in the presence of quenched disorder. We find that initially random perturbations tend to exponentially localize in space around static pinning centers that are select
Externí odkaz:
http://arxiv.org/abs/0804.0569