Recognizing people based on their biological or behavioral characteristics, called biometric authentication, has been applied over hundred years. Two important issues, 1) distinctiveness and 2) permanence should be considered for biometric authentication. Distinctiveness of a biometric refers to that any two persons should be sufficiently different in terms of the features in the biometrics. Pe...

The ability to create and hold a mental schema of an object is one of the milestones in cognitive development. Developmental scientists have named the behavioral manifestation of this competence object permanence. Convergent evidence indicates that frontal lobe maturation plays a critical role in the display of object permanence, but methodological and ethical constrains have made it difficult ...

A discrete non-autonomous SIRVS model with general incidence is obtained from a continuous model by applying Mickens non-standard discretization method. Conditions for the permanence and extinction of the disease and the stability of diseasefree solutions are obtained. It is also proved that, if the time step is sufficiently small, when we obtain extinction (respectively permanence) for the con...

Using stochastic differential equations with Lévy jumps, this paper studies the effect of environmental stochasticity and random catastrophes on the permanence of Lotka-Volterra facultative systems. Under certain simple assumptions, we establish the sufficient conditions for weak permanence in the mean and extinction of the non-autonomous system, respectively. In particular, a necessary and suf...

This paper is concerned with the permanence and extinction problem of enterprises cluster constituted by m satellite enterprises and a dominant enterprise. We present the model involving impulsive effect based on ecology theory, which effectively describe the competition and cooperation of enterprises cluster in real economic environment. Applying comparison theorem of impulsive differential eq...

The homeless drop out of treatment relatively frequently. Also, prevalence rates of personality disorders are much higher in the homeless group than in the general population. We hypothesize that when both variables coexist - homelessness and personality disorders - the possibility of treatment drop out grows. The aim of this study was to analyze the hypotheses, that is, to study how the existe...