Le Reid, destroyer construit en 45 jours, 1200 tonnes, 30000 hp, 40 miles à l'heure : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 57144

Fronts from complex two-dimensional dispersal kernels: theory and application to Reid's paradox

Bimodal dispersal probability distributions with characteristic distances differing by several orders of magnitude have been derived and favorably compared to observations by Nathan [Nature (London) 418, 409 (2002)]. For such bimodal kernels, we show that two-dimensional molecular dynamics computer simulations are unable to yield accurate front speeds. Analytically, the usual continuous-space random walks (CSRWs) are applied to two dimensions. We also introduce discrete-space random walks and use them to check the CSRW results (because of the inefficiency of the numerical simulations). The physical results reported are shown to predict front speeds high enough to possibly explain Reid's paradox of rapid tree migration. We also show that, for a time-ordered evolution equation, fronts are always slower in two dimensions than in one dimension and that this difference is important both for unimodal and for bimodal kernels

Les partisans : roman (3e édition) / Mayne Reid ; trad. de l'anglais... par Hephell

Collection : Bibliothèque des meilleurs romans étrangers

Crítica de Reid à concepção de identidade pessoal de Locke

Fazer uma abordagem na qual seja apresentada a análise crítica de Reid acerca da teoria da identidade pessoal de Locke constitui-se como o objetivo principal desse artigo. Tal análise aponta para duas consequências significativas: a) se a mesma consciência pode ser transferida de um ser inteligente para outro, então, dois ou vinte seres inteligentes podem ser a mesma pessoa; b) a de que um homem pode ser e, ao mesmo tempo, não ser a pessoa que praticou uma determinada ação. Tendo como ponto de partida essas consequências, Reid explicitará algumas considerações em torno do assunto.

Les chasseurs de bisons ([3e édition]) / Mayne-Reid ; traduction Raoul Bourdier

Collection : Collection Jules Rouff

Le chef au bracelet d'or (3e édition) / par Mayne-Reid ; adaptation par André Laurie

Collection : Bibliothèque d'éducation et de récréation