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16.961  Articles
1 of 1.697 pages  |  10  records  |  more records»
Electromagnetic waves are a radio, light, X-rays and gamma rays. However, traditionally electromagnetic waves considered in scientific and in academic literature in different positions. Radio waves are always considered as a waves, while light is represen... see more

The very strong volcanic eruption of Mt. Pinatubo in June 1991 directly affected the troposphere and lower and middle stratosphere. Here we look at its effects in the mesopause region as revealed by the radio wave absorption measurements in the lower iono... see more

Modern radio engineering systems are characterized by the use of radio waves with a complex internal structure as information carriers. Such radio waves are characterized by an increased transmission spectrum width and programmed pseudo-random tuning of t... see more

Given the inherent need to have technological tools to reduce the number of incidents caused by the operation of heavy machinery, this document briefly describes the design of a prototype Accident Prevention System for industrial vehicles using Radio Fre... see more

There is a huge body of evidence in the literature that exposure to radio frequency (RF) has been linked to a variety of adverse health outcomes that may have significant health problems for user of mobile phone. Credible scientific evidences are there th... see more

Commonly anecdotally noted among physics instructors is that students often misidentify radio-waves as sound waves, not as part of the electromagnetic light-energy spectrum. To highlight the prevalence of this error, a pilot survey, whose results are pres... see more

This paper presents an analysis of subject-specific radio channels in wireless body area networks (WBANs) using a simulation tool based on the parallel finite-difference time-domain (FDTD) technique. This technique is well suited to model radio propagatio... see more

Attempts are made to analyze in detail the models of stable connection distances’ determination for Unmanned Aerial Vehicle in a city (town) conditions. The appropriateness of Okumura-Hata and Walfich-Ikegami models’ usage for enumeration of radio-waves l... see more

Conducted analyze of models of prognostication of covering zones in the city conditions. Expediency of joint application of models Okamura–Hata and Wallfishe–Ikegamy for calculation of losses at propagation of radio waves. It will allow more exactly to ta... see more

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