We consider the permanence of a periodic predator-prey system, where the prey disperse in a two-patch environment. We assume the Volterra within-patch dynamics and provide a sufficient and necessary condition to guarantee the predator and prey species to be permanent by using the techniques of inequality analysis. Our work improves previous relevant results.

Disperse dye inks are used in the inkjet textile printing of polyester fabrics. We aimed at developing a black disperse dye ink consisting of yellow, magenta, and cyan dyes that met the exacting requirements of safety, image durability, and storage stability. One difficulty we met was dye particles tending to aggregate/agglomerate, leading to sedimentation and the threat of head clogging and/or...

Random dense packing of poly-disperse discs and spheres generated under the infinitesimal gravity protocol is investigated by a Monte Carlo simulation. For the binary discs packed in two dimensions, the packing fraction of disc assembly becomes lower than that of the monodisperse system when the size ratio is close to unity. We show that the suppressed packing fraction is caused by an increase ...

In present work a compound holographic system consisting of a diffraction grating and a holographic lens has been fabricated to disperse and focus different portion of solar spectrum on laterally arranged solar cells of different band gaps to achieve maximum efficiency operation. Such concentrators are light–weight, low-cost and do not require tedious processing for their mass production.

In energy constrained Wireless Sensor Networks (WSN), network lifetime is considered as one of the most important metrics from the design point of view. In our paper, we have addressed the impact of a disperse node on network lifetime and have proposed a new design approach, Lifetime Enhancement for Disperse Networks (LEDN) to reduce its effect on a two tiered WSN. A mathematical analysis has a...