Performance Evaluation,System Design and Network Deployment of IEEE 802.11

This paper presents a system design technique for the IEEE 802.11 Wireless Local Area Network (WLAN) considering the significant parameters namely coverage, cell/frequency planning, interference, power management and data rate. The effect of the parameters on the performance of IEEE 802.11 in terms of throughput has been discussed using measurement and numerical results.These results and concepts are extremely important not only for the system design and deployment of IEEE 802.11 WLANs but also for other indoor wireless communications systems.     

The new politics of child and family policies

Given the slowdown in the legislative process and the absence of any closure on the proposed congressional initiatives on social safety net programs, the specifics of the policy developments are still unclear. What is clear, however, is that the United States is entering a period of social policy devolution, federal (and probably state) funding cuts for social benefits and services, and a major philosophical shift in the premises underlying social policy. These policy trends have major implications for the social work profession, for practitioners at all levels, for educators, and most important for low-income and vulnerable children and their families. Social workers need to become informed about these developments if they are to be effective practitioners, teachers, and advocates.