Browse 6,486 peer-reviewed studies on electromagnetic field health effects from 4 research libraries.
Showing 2,816 studies in Whole Body / General
Neil T. Larsen · 1976
Researchers developed a new DC-substitution RF power meter that is not a form of Wheatstone bridge. The instrument allows four-terminal measurement of bolometer resistance and provides improved accuracy and lower noise at lower cost. Servo system measurement errors are typically less than 0.01 percent. Performance testing showed a standard deviation of about 0.008 percent over 1024 random measurements.
Norbert N. Hankin · 1976
Norbert N. Hankin et al. · 1976
Researchers analyzed environmental radiofrequency and microwave radiation from high-power sources including satellite communication earth terminals, radars, and broadcast transmitters. Considering factors such as number of sources, potentially exposed persons, and operating procedures, they concluded broadcast transmitters constitute the most environmentally significant source category. For non-occupational individuals at closest approach distances, anticipated power densities were generally below the 10 mW/cm² occupational threshold. Radar time-averaged power densities were two to four orders of magnitude below peak values due to pulsing, and rotating antennas reduced exposure further.
Henry S. Ho · 1976
Peter Atkins · 1976
Robert Sugarman · 1976
Ronald J. Spiegel · 1976
Tell R A · 1976
Arthur W. Guy, Michael D. Webb, John A. McDougall · 1976
Kamal AA, Al-Badwaihy K, Hashish E · 1976
Researchers modeled microwave transmission into a planar half-space of biological tissue using elementary electric and magnetic dipoles as sources. They computed the transmission coefficient U for four dipole configurations and found that its maximum value increases and shifts toward the dipole projection as the dipole height decreases. The authors state that near-zone fields may be hazardous even below current standard safe levels because they can have higher transmission coefficients than assumed plane-wave exposures.
W.R. Adey · 1976
Siekierzynski M et al. · 1976
Prucha RV · 1976
Researchers exposed full-scale phantom models of a two-year child and a woman to emissions from a forced leak in a microwave oven operating at 915 MHz. Thermographic analysis provided data on specific absorption rate and heating patterns, which were related to the defined leakage source intensity. These data were used for heat input and temperature rise calculations in thermal models of humans, including both worst-case and typical-case scenarios based on movement patterns. Results were compared with other heating means such as metabolic rate changes, sunlight exposure, and medical diathermy practice. The findings indicated that current microwave oven emission standards are very conservative.
Robert H. Lenox et al. · 1976
Stewart J. Allen et al. · 1976
Terence C. O'Grady et al. · 1976
James C. Lin · 1976
A. S. Presman · 1975
James D. Grissett · 1975
Ward WD, Gloria A · 1975
Yu. G. Shaposhnikov, I. F. Yares'ko, Yu. V. Vernigora · 1975
William B. Stavinoha et al. · 1975
The second study used 40-minute daily exposures for 5 days at 19 MHz with an H-field of 55 amps/meter and an E-field of 8000 volts/meter. Growth was tracked daily for 21 days and then weekly for 16 weeks, and no statistically significant differences were found between exposed and control groups.
A. Shostak · 1975
Terry O. Steiner · 1975
The system provides continuous monitoring of pacemaker output and simulates normal cardiac activity at the pacemaker leads using fiber optics for electrical isolation. The monitor presents a resistive load of approximately 1000 ohms that drops to about 500 ohms when the LED fires during a pacemaker pulse. The entire system was successfully tested at 26.6 MHz and near RF emitters from 200 to 3000 MHz, and the simulator addition did not affect the pacemaker threshold.
C. Romero-Sierra et al. · 1975