Dynamical social phenomena have been modeled using differential systems employed in mathematical models of epidemiology. In Misra (2012), an epidemiological model is used to study the “spread” of two political parties. In ...

Zinc oxide (ZnO) films were synthesized using spray pyrolysis using glass as substrate at substrate temperature of 400°C. The precursor used is an aqueous solution of ZnCl2. The deposition was done in ambient conditions. ...

In this study, a system of delay differential equations arising from a three-species model with two predators feeding on a single prey is considered. It is assumed that the prey population grows logistically in the ...

We exhaust all solutions of the Diophantine equation 3x + 5y + 7z = w2 in non-negative integers using elementary methods.

In this paper, we propose Differential Evolution - Simulated Annealing (DESA), a hybrid optimization algorithm for fitting autoregressive models to data. The addition of a new strategy based on parabolic estimation to ...

Island snail diversity is truly amazing for archipelagic country such as Philippines with the prospect of high level of endemicity. The Northern Luzon alone encompasses the two largest mountain chains with different ...