In multi-hop relay systems, the end-to-end channel capacity is restricted by bottleneck node. In order to prevent some relay nodes from being the bottleneck of system and to guarantee the end-to-end channel capacity, the method of optimizing transmit power, distance and allocation time is proposed in this article. We show that the optimizing distance has more end-to-end channel capacity than th...

In this paper, we present a high accuracy laser range finder and velocimeter using ultra-fast time-to-digital converter (TDC). The system operation is based on the measuring the round-trip time of a narrow laser pulse. A low-dark current high-speed PIN photodiode is used to detect the triggered laser beam and to produce start signal. The pulsed laser diode generates 45W optical power at 30ns du...

We propose an improved power macro-model for arithmetic datapath components, which is based on spatio-temporal correlations of two consecutive input vectors and the output vector. Based on the enhanced Hamming-distance model [3], we introduce an additional spatial distance for the input vector and the Hamming-distance of the output vector to improve model accuracy significantly. Experimental re...

Existing estimation approaches for spatial databases often rely on the assumption that data distribution in a small region is uniform, which seldom holds in practice. Moreover, their applicability is limited to specific estimation tasks under certain distance metric. This paper develops the Power-method, a comprehensive technique applicable to a wide range of query optimization problems under b...

"Civilizations" and "world systems" are alternative labels for the largest macropolitical entities that have existed in human history. These historical civilizations/world systems may be seen as having two polar types of power structure, the "states system" and the "universal empire." Each form has certain characteristic accompaniments, which may promote it, be promoted by it, or both. For stat...

I. Introduction The Electric Power Industry Reform Act (EPIRA) was enacted in 2001 with the intention of ensuring affordable and reliable electricity to all power consumers in the Philippines. The EPIRA seeks to achieve this through the introduction of sweeping reforms including the restructuring and deregulation of the entire power industry and the privatization of most state‐owned power gener...

Asian Power February 2002 21 www.asian-power.com Fault management in distribution networks is one of the most challenging and at least the most visible task of the utilities. From the customer point of view the power cut means at least harm but in many cases also costs, which may be tens of times greater than the cost of delivered energy. Pekka Verho, Product Manager at ABB in Finland (part tim...

Power consumption is rapidly increased in data centers because the number of data center is increased and more the scale of data center become larger. Therefore, it is one of key research items to reduce power consumption in data center. The peak power of a typical server is around 250 watts. When a server is idle, it continues to use around 60% of the power consumed when in use, though vendors...

Subject matter of this paper deals with issues of the environmental impact of infrasound noise associated with operation of low-power wind turbines. It is now the current and relevant problem for both the cognitive and utilitarian standpoint. There is now a considerable growth in the number of such installations in Poland, Europe and in the world, due to the possibility of locating them on exis...

The Great East-Japan Earthquake and the resulting tsunamis struck the Fukushima Daiichi Plant on March 11, this year and caused a serious nuclear accident. The fact that this accident has raised concerns around the world about the safety of nuclear power generation is a matter which we take with the utmost seriousness and remorse. At the same time, I would like to express Japan’s sincere gratit...