Recently, visible light communication (VLC) networks have emerged as a promising alternative for indoor data access, due to high data rate, low implementation cost, and immunity to radio frequency (RF) interference.However, the co-existence of VLC with the RF access points as well as the dependence of VLC to room illumination compel both technologi
A nonautonomous discrete predator-prey system incorporating a prey refuge and Holling type II functional response is studied in this paper.A set of sufficient conditions which guarantee Pioneer Wire Harness the persistence and global stability of the system are obtained, respectively.Our results show that if refuge is large enough then predator spe
Economic indicators in the pig production depend greatly on the results in the piglet production.One of the factors which have impact on the piglet production kids sweatpants expenses is the period of the use of brood sows.Determining the optimal period of the sow usage is made through the assessment of the optimal number of the achieved farrows.In