A general predator-prey model is considered in which the predator population is assumed to have an age structure which significantly affects it fecundity. The model equations are derived from the general McKendrick equations for age structured populations. The existence, stability and de-stabilization of equilibria are studied as they depend on the prey's natural carrying capacity and the matur...

Un corpus de recherches empiriques effectuées dans différents pays a confirmé que l’inégalité des revenus est liée d’une manière négative à la croissance économique. Cet article fournit une voie à suivre pour expliquer ce rapport. La nouveauté de notre démarche réside dans l’utilisation de la démographie pour expliquer l’écart entre les pays en matière de croissance économique et répartition de...

The partial differential equation has been vastly applied to analyzing the problems in the life sciences. However, these types of partial differential equation models are mostly deterministic. As we know, the real life is full of uncertain factors, hence the above deterministic partial differential equations are not enough to handle the problems with uncertain noises. For modelling these proble...

The dendritic structures of 187 small supragranular pyramidal neurons of the posterior superior temporal gyrus were studied with rapid Golgi impregnations in postmortem samples from 10 men aged 21-71 years. The number of primary basilar dendritic branches, the total number of basilar dendritic endings, the total basilar dendritic length, the total number of visible basilar dendritic spines and ...

The demographic age structure influences the aggregate of individual economic decisions. Standard macroeconomic models imply that inflation pressure will covary with the age distribution unless accommodated by monetary policy. We estimate the relation between inflation and age structure on annual OECD data 1960–1994 for 20 countries. The result is an age pattern of inflation effects consistent ...

In this thesis, basic concepts of populational models are studied from a theoretical point of view, especially the long term behaviours. All models are at least time dependent with additional age structure, spatial structure. The last model which is an extension of the von Foerster equation, is dependent on all o f these structures and have a long-term solution for large values of time. Modelin...

This paper assesses empirically the relationship between GDP per capita growth uctuations and the age structure and intensity of human capital across developed and developing countries We estimate a spatial vector autoregressive model of income dynamics where the economic distance between countries is de ned on their similarity in measures of human capital and its distribu tion across age group...

We study the evolution of cooperation in evolutionary spatial games when the payoff correlates with the increasing age of players (the level of correlation is set through a single parameter, α). The demographic heterogeneous age distribution, directly affecting the outcome of the game, is thus shown to be responsible for enhancing the cooperative behavior in the population. In particular, moder...