In ecology, the refuge protection of prey plays a significant role in dynamics interactions between and predator. this paper, we investigate non-smooth prey–predator mathematical model characterized by density-dependent intermittent prey. The assumes population density predator as an index for to decide on when avail or discontinue protection, representing level apprehension predators. We apply...

Higher levels of integration have led to a generation of integrated circuits for which power dissipation and reliability are major design concerns. In CMOS circuits, both of these problems are directly related to the extent of circuit switching activity. The average number of transitions per second at a circuit node is a measure of switching activity thit has been called the transition density....

Afferent lymphatic vessels to the popliteal lymph node in the rat were blocked, and the node was histologically examined 2-35 weeks later. After the operation, the node was reduced in size and its lymphoid structures, such as germinal centers, lymph follicles and deep cortex units, were decreased in size and number. At 16 weeks, the lymphoid organization of the node reached a minimal level, but...