Motivated by issues arising in population dynamics, we consider the problem of iterating a given analytic function a number of times. We use the celebrated technique known as Carleman linearization that turns (for a certain class of functions) this problem into simply taking the power of a real number. We expand this method, showing in particular that it can be used for population models with i...

This study investigates the effect of competition between individuals on population dynamics when they compete for different resources during different seasons or during different growth stages. Individuals are assumed to compete for a single resource during each of these periods according to one of the following competition types: scramble, contest, or an intermediate between the two. The effe...

In this paper, we consider an autonomous two-dimensional ODE Kolmogorov-type system with three parameters, which is a particular of the general predator–prey systems Holling type II. By reformulating as set two second-order differential equations, investigate nonlinear dynamics from Jacobi stability point view using Kosambi–Cartan–Chern (KCC) geometric theory. We then determine connection, Berw...

Remote tropical oceanic islands are of high conservation priority, and they are exemplified by range-restricted species with small global populations. Spatial and temporal patterns in rainfall and plant productivity may be important in driving dynamics of these species. Yet, little is known about environmental influences on population dynamics for most islands and species. Here we leveraged avi...

In this paper, the authors cite research indicating that youth may be the single age group most at risk of becoming homeless, yet comparatively little research has been done in the past decade on this vulnerable population. Some important progress has been made, including longitudinal studies on youth “aging out” of foster care. After reviewing the characteristics of homeless youth, the authors...

Although difficult to estimate for prehistoric hunter-gatherer populations, demographic variables-population size, density, and the connectedness of demes-are critical for a better understanding of the processes of material culture change, especially in deep prehistory. Demography is the middle-range link between climatic changes and both biological and cultural evolutionary trajectories of hum...

This paper is concerned with issues of measurement of poverty rates among the elderly population and with the alleviation of that poverty by means of shared living arrangements. Specifically, we estimate effects of taking account of assets as well as income, of including in income government subsidies on food, rent, and household energy, and of setting higher poverty thresholds. The effects of ...

background: no study has been conducted yet on the process of adjustment of wives with their husbands’ erectile dysfunction in the transitional stages, and there is lack of understanding of this process in iran. objectives: a qualitative, grounded-theory study was designed to examine the process of adjustment of wives with their husbands’ erectile dysfunction in transitional stages. materials a...

Cauchy problem, 68adaptability, 26admissible control, 117anisotropiccollision, 67interactions, 73approach to equilibrium, 110 breakdowns of machines, 23Brownianparticle, 114motion, 103motor, BMot, 113bullwhip effect, 23busy period, 96 Cattaneo system, 104chemotaxis, 105clogging at bottlenecks, 4competition, 7complex behavior, 63<lb...