A 20/30 GHz personal access satellite system study
The potential and feasibility of a personal access satellite system which will offer the user freedom and mobility are being explored. The authors define the system concept and applications, present a strawman design, and identify the enabling technologies. The system as currently conceived could provide voice and data services to users in the contiguous US in the late 1990s to the early 2000s using the 20/30 GHz bands. >
Natural resource preservation has recently become a significant concern,and has motivated research and development efforts to assist in both conservation and management.Electricity usage in residential and commercial buildings represents a significant fraction of total energy expenditure.A key prerequisite for energy conservation is knowing when and where energy is being spent.However,in the current energy reporting devices only provide coarse grained information.This paper presents a fine grained power auditing system based on the sensor networks.This system can provide detailed information about the total energy consumption in any period for each appliance and thus will become an efficient tool for future real-time pricing.At the same,some behavior model can be drawn from the collected data based on the proposed system.