AbsrmtThis paper describes a method to minimize the total energy to communicate data over a frequency selective fading channel using multicarrier data transmission. The energy is minimized given a desired aversge bit e m r rate at a fixed gross bit rate. For a number of configurations the optimal energy distribution is calculated analytically. For other Eonfigurations we present a generic numer...

A low volume formulation of propoxur wettable powder suspended in larvicidal oil was evaluated on 4 occasions in Kern Co., California during 1983 using fixed and rotary wing aerial application systems. Culex tarsalis abundance was suppressed significantly by all sprays, although reduction below the virus maintenance threshold of 30 females per trap night was achieved only at one foothill site. ...

An Agent Based Model was used to explore the effects of spatial social networks and of different means of horizontal information transmission over cooperation when groups provide protection against predation. We tested two ways to calculate transition probabilities governing the information diffusion of the majority’s opinion: using fixed rates and using a rate proportional to group’ sizes. Our...

The objective of this study is to examine the socioeconomic and intervening determinants of fertility control in Korea. The conceptual framework applied here is based on the synthesis framework of fertility control developed by Easterlin and Crimmins. The data came from the 1974 Korean National Family Survey, which was conducted as part of the World Fertility Survey. The study focuses on the...

Limited hardware capabilities and very limited battery power supply are the two main constraints that arise because of small size and low cost of the wireless sensor nodes. Power optimization is highly desired at all the levels in order to have a long lived Wireless Sensor Network (WSN). Prolonging the life span of the network is the prime focus in highly energy constrained wireless sensor netw...

In digital communication bandwidth is essential parameter to be considered. Transmission and storage of images requires lot of memory in order to use bandwidth efficiently neural network and Discrete cosine transform together are used in this paper to compress images. Artificial neural network gives fixed compression ratio for any images results in fixed usage of memory and bandwidth. In this p...

We propose an adaptive power based transmission scheme for WSN (Wireless Sensor Networks) where transmit power is adapted depending on node density and channel conditions so as to maintain a desired level of signal detection probability at a receiving node as demanded by sensing range. In existing Fixed Transmit Power Scheme (FTPS), detection probability degrades with decrease in node spatial d...

Fixed-beam, high-gain antenna systems can be used for a finer partitioning of the currently cell-sectoring. This has benefit reducing number users seen per beam, which reduces interference. Furthermore, high gain allows effective isotropic radiated power while keeping transmit low. In this paper, we study performance such fixed-beam, system design millimeter-wave mobile communications. The is d...