Ionizing radiation long has been recognized as a cause of cancer. Among environmental cancer risks, radiation is unique in the variety of organs and tissues that it can affect. Numerous epidemiological studies with good dosimetry provide the basis for cancer risk estimation, including quantitative information derived from observed dose-response relationships. The amount of cancer attributable t...

Only 17 per cent of French households received digital television in 2002. Hence, for public authorities, digital terrestrial television (DTTV) is mainly a means to stimulate the development of digital television. However, cable and satellite operators (TF1, M6 and Canal Plus), which have been designated as leaders of the DTTV process, are reluctant, as they view DTTV as a competitor to their e...

Wireless sensor networks have emerged as a fastgrowing technology that has enabled us to monitor physical and environmental states. As of yet these valuable sensor networks have been bound to terrestrial terrains; however, seventy percent of the Earth’s surface is covered by enormous bodies of water: oceans, seas and rivers. Most of this territory remains unchartered, and this primarily gave a ...

T HE discrete memoryless broadcast channel (%P(YJlX), 94 x 3) consists of three finite sets % ., 9, % and a probability transition matrixp(y,zjx). Let p,(ylx) andp,(zIx) be the two marginals of p(y,zlx), and let P, and P2 denote the discrete memoryless channels with probability transition matrices p&y Ix) and pz(zlx), respectively. Recall the following three relations between P, and P2. Definit...

This study aims at finding out if households or organizations are faster in their acceptance of a technological innovation. The object of this study is digital terrestrial television (DTT), specifically the implementation of DTT in Denmark. The theoretical framework is diffusion of innovation theory. Three surveys were carried out for both households and organizations. Based on the surveys, the...

As digital television matures, applications which utilize data embedded in the broadcast television signal are likely to be an important feature of the new medium. This paper explores some of the issues involved in the implementation of systems for the utilization of data which accompanies digital television's video and audio content. Chief among these issues are those which

This paper describes the ongoing development of a radiation-tolerant version of ITT Industries’ Low-Power Transceiver (LPT). The LPT is a compact, flexible device that can be configured to perform custom communications and navigation functions in terrestrial, airborne, and space applications. The radiation-tolerant version of the LPT will maintain most of the LPT’s existing functionality and re...