DMT modulation has become a standard communications method for DSL and indoor LAN technology. By utilising the FFT it is able to overcome the problems associated with transmission over a nonflat communications channel. In DSL and indoor LAN technologies, the dominant source of performance impairment is crosstalk. Results are presented here in the context of DMT on an economical cabling scheme w...

Background Exposure to electromagnetic fields (EMFs) by using electrical machines, tools, industrial instruments, power lines, and communications devices has occurred as a result of technological developments and is causing a threat to normal lives. The aim of this study was to evaluate the effects of long-term exposure to radiofrequency (RF) radiations emitted by mobile jammers.on sperm qualit...

Impulse noise is one of the major obstacles of data communications over power lines. Recently, the principle of compressed sensing is proposed to apply to the impulse noise cancellation in powerline communications [4,8]. This paper is to evaluate the effectiveness of this technique against real-life impulse noises (IN) measured from real powerline communication (PLC) systems. The INs are record...

The world of telecommunications, especially mobile communications, continues to evolve with innovative technologies and high-speed data services. In many economies, mobile phones have overtaken fixed lines. In this dynamic context, we have envisaged to study mobile communication diffusion in Germany and India, from a historical comparative perspective. The basic standard for comparison has been...

Videoconferencing is becoming a commonplace facility. In the past this has been over dedicated lines, but increasingly, communities are experimenting with video and audio over today’s packet switched digital networks without using very expensive quantities of bandwidth, in attempt to economise by using the existing communications infra-structure. This paper is about traffic characterisation and...

The use of the electric power transmission and distribution system as a transmission medium for broadband communications is considered. It is found that there are three significant technical hurdles to be overcome before successful implementation of such systems can be accomplished. The first is the relatively high attenuation rate due to discontinuities such as taps, transformers and other dev...

Rapid and dramatic changes in climate and glacial conditions have taken place during the last 2.5 million years of the earth’s history. Huge ice sheets expanded and contracted periodically, at times covering large areas of North America and Europe. Global sea levels dropped and rose 100 m to 150 m in response to the growth and melting of glaciers, causing continental coast lines to move far int...

The article focuses on the strategic analysis of demand for satellite communications services in telecommunications market, degree development problem, object, topic, initial assumption and goal research. A study market by its key segments was carried out. classification chosen based criterion list’s minimalism not allowing double accounting revenue, which is possible with B2B then B2C chains. ...

Genetic selection for an ascites-resistant line of broilers is seen as a permanent solution to the ascites problem. Ascites-resistant and ascites-susceptible lines have been developed using sire family selection based on mortality data taken from siblings reared in a hypobaric chamber (simulated 2,900 m above sea level). The relaxed line is representative of the original commercial pureline sto...