Single-species population models often include density-dependence phenomenologically in order to approximate higher order mechanisms. Here we consider the common scenario in which density-dependence acts via depletion of a renewed resource. When the response of the resource is very quick relative to that of the consumer, the consumer dynamics can be captured by a single-species, density-depende...

We present some properties of k-existentially-closed and k-saturated graphs, as steps toward discovering a 4-saturated graph. We demonstrate a construction for 2-saturated graphs, prove the existence of k-e.c. graphs, and show that the chromatic number of k-saturated graphs increases with k. Finally, we detail an algorithm for finding k-existentially-closed and k-saturated graphs.

Local species diversity is maintained over ecological time by a balance between dispersal and species interactions. Local-regional species richness relationships are often used to investigate the relative importance of these two processes and the scales at which they operate. For communities undergoing succession, theory predicts a temporal progression in local-regional species richness relatio...

This paper proposes an integrated magnetic structure for a CLLC resonant converter. With the proposed structure, two inductances and transformer are into one core, which improves power density of In decoupled with can be adjusted by number turns in each inductance. Furthermore, coupled to reduce As result, conduction loss reduced. The trade-off design is carried out based on Pareto optimization...

The objective of present paper is to examine the peristaltic flow of magnetohydrodynamic (MHD) Jeffrey fluid saturating porous space in a channel through rotating frame. Unlike the previous attempts, the flow formulation is based upon modified Darcy's law porous medium effect in Jeffrey fluid situation. In addition the impacts due to Soret and Dufour effects in the radiative peristaltic flow ar...

We study numerically the effects of finite curvature and ellipticity of the Gaussian beam on propagation through a saturating nonlinear medium. We demonstrate generation of different types of pattern arising from the input phase structure as well as the phase structure imparted by the nonlinear medium.

Microgrid as the main building block for future smart grids is prone to instability originated from converter-based distributed generations (DG). Herein, we first analyze small-signal stability of an inverter-interfaced microgrid. Afterwards, a novel adaptive network fuzzy inference system (ANFIS)-based optimization method introduced which aims at online tuning virtual inductances (VI) in islan...