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Stochastic Effect - PubMed

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Last Updated: 26 January 2023

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Stochastic Particle Creation: From the Dynamical Casimir Effect to Cosmology.

We investigate a stochastic simulation of the dynamic Casimir effect, determining particle formation inside a cavity created by random movement of one of its walls' walls. We compare the stochastic particle manufacturing process with the deterministic counterpart. The equations are generally similar to those that describe the stochastic particle creation in a cosmological sense, which we redefine using multiple scale analysis.

Source link: https://doi.org/10.3390/e25010151


Phenomenological bifurcation in a generally stochastic population model with Allee effect.

With the help of Fokker-Planck's formula, we find that the model's shape changes from one structure to another as the noise level goes through a threshold, i. e. , P-bifurcation occurs. This paper seeks to investigate noise-induced phenomenological bifurcation in a general population model with Allee as a result of associated additive and multiplicative white noises. When the noise level crosses a threshold value passes through a threshold, i. e. , the P-bifurcation occurs, we find that SPD's shape changes from one structure to another.

Source link: https://doi.org/10.1140/epje/s10189-022-00235-w


Quantifying the effect of genetic, environmental and individual demographic stochastic variability for population dynamics in Plantago lanceolata.

Using population forecast models of an experimental population of Plantago lanceolata, we show the effect of such non-selective demographic shifts on population dynamics. According to our report, individuals's persistent reproduction and survival are largely due to genetic variability, genes, and family interactions, with only modest effects of environmental, genetic, and genetic interactions. When demographic variability is high, typical population growth estimates based on estimated lifetime reproduction and generation time may be misleading. Large population variations observed within genotypes can reduce population growth and slow evolutionary dynamics, as shown by genotypes.

Source link: https://doi.org/10.1038/s41598-021-02468-9

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions