Biomath Pub Date : 2018-04-19 DOI: 10.11145/j.biomath.2018.07.217

R. Eftimie

{"title":"The impact of environmental noise on animal communication: pattern formation in a class of deterministic and stochastic hyperbolic models for self-organised biological aggregations","authors":"R. Eftimie","doi":"10.11145/j.biomath.2018.07.217","DOIUrl":"https://doi.org/10.11145/j.biomath.2018.07.217","url":null,"abstract":"The collective movement of animals occurs as a result of communicationbetween the members of the community. However, inter-individual commu-nication can be aected by the stochasticity of the environment, leading tochanges in the perception of neighbours and subsequent changes in individualbehaviour, which then in uence the overall behaviour of the animal aggre-gations. To investigate the eect of noise on the overall behaviour of animalaggregations, we consider a class of nonlocal stochastic and deterministic hy-perbolic models for the collective movement of animals. We show numericallythat strong noise does not seem to in uence the spatio-temporal pattern (i.e.,travelling aggregations) observed when all neighbours are perceived with thesame intensity (i.e., the environment is homogeneous). However, when neigh-bours ahead/behind are perceived dierently by a reference individual, noisecan lead to the destruction of the spatio-temporal pattern. Moreover, weshow that the increase in noise can lead to dierent transitions between dif-ferent spatio-temporal patterns, and these transitions are relatively similarto the transitions between patterns when we perturb deterministically someparameters.","PeriodicalId":52247,"journal":{"name":"Biomath","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43478298","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

A stochastic model for intracellular active transport 细胞内主动转运的随机模型

Biomath Pub Date : 2018-04-02 DOI: 10.11145/J.BIOMATH.2018.12.047

Raluca Roxana Purnichescu Purtan, Irina Badralexi

引用次数: 0

Bayesian inference of a dynamical model evaluating Deltamethrin effect on Daphnia survival 溴氰菊酯对水蚤存活影响动态模型的贝叶斯推断

Biomath Pub Date : 2018-03-03 DOI: 10.11145/J.BIOMATH.2018.12.177

A. Diouf, B. I. Camara, D. Ngom, Héla Toumi, V. Felten, J. Masfaraud, J. Férard

{"title":"Bayesian inference of a dynamical model evaluating Deltamethrin effect on Daphnia survival","authors":"A. Diouf, B. I. Camara, D. Ngom, Héla Toumi, V. Felten, J. Masfaraud, J. Férard","doi":"10.11145/J.BIOMATH.2018.12.177","DOIUrl":"https://doi.org/10.11145/J.BIOMATH.2018.12.177","url":null,"abstract":"The toxicokinetic and toxicodynamic models (TK-TD) are very well-known for their ability, at both the individual and the population level, to accurately describe life cycles such as the growth, reproduction and survival of sentinel organisms under the influence of an ecological biomarker. Being dynamics, the consistent inference of life history and environmental traits parameters that engender them is sometimes very complex numerically, especially as these parameters vary from one individual to another. In this paper, we estimate the parameters of a survival model TK-TD already applied and validated by the implementation of the R package GUTS (the General Unified Threshold Model of Survival) by another coding applied to another very recent implementation of Bayesian inference with the R package deBInfer in order to evaluate the survival effects of our ecotoxicological biomarker called Deltamethrin on our Daphnia sample. The study allowed us to evaluate from a population point of view especially the threshold concentration not to be exceeded to observe a survival effect commonly known NEC (No effect Concentration) and possibly determine the correlations between different variables of life history and the environment traits.","PeriodicalId":52247,"journal":{"name":"Biomath","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42083951","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Bifurcations in valveless pumping techniques from a coupled fluid-structure-electrophysiology model in heart development 心脏发育中流体-结构耦合电生理模型的无瓣泵送技术的分支

Biomath Pub Date : 2017-09-14 DOI: 10.11145/j.biomath.2017.11.297

Nicholas A. Battista, L. Miller

引用次数: 3

More than Skew: Asymmetric Wave Propagation in a Reaction-Diffusion-Convection System. 超过倾斜:不对称波在反应-扩散-对流系统中的传播。

Biomath Pub Date : 2013-03-09 DOI: 10.11145/J.BIOMATH.2013.03.027

E. Flach, J. Norbury, S. Schnell

引用次数: 1

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