Results 261 to 270 of about 127,907 (304)

EXPOSURE ASSESSMENT FOR POWER Frequency Electric and Magnetic Fields

American Industrial Hygiene Association Journal, 1993
Over the past decade considerable data have been collected on electric and magnetic fields in occupational environments. These data have taken the form of area measurements, source characterizations, and personal exposure measurements. Occupational EMF levels are highly variable in space and time.
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Bioeffects issues of power frequency magnetic fields

[1993] Proceedings of the Twelfth Southern Biomedical Engineering Conference, 2002
The recent release of two Swedish epidemiological studies correlating residential and occupational magnetic field exposures with certain cancers has strengthened the hypothesis that high voltage power delivery can increase the incidence of cancer.
W.W. Shelton, J.C. Toler
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The indoor magnetic field environments at the power frequency

First IEE International Conference on Building Electrical Technology (BETNET), 2004
With more and more electrical appliances come into the offices and homes, the indoor magnetic field at 50/60 Hz have been significantly increased due to the use of electricity. Long time exposure of human to strong magnetic fields is definitely harmful to the health.
null Ming-li Chen, null Tsz Ho Ng
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Susceptibility of magnetic information storage to power frequency magnetic fields

IEEE Electromagnetic Compatibility Magazine, 2013
The potential for loss of magnetically stored information in the presence of power frequency magnetic fields is described in terms of fundamental physical mechanisms. Three important mechanisms are identified: (1) short term erasure when external fields are high enough to be a significant fraction of the demagnetizing field, (2) long term thermal ...
J. F. Hoburg, J. A. Bain, J. M. Silva
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ASSESSING COMPLIANCE WITH POWER-FREQUENCY MAGNETIC-FIELD GUIDELINES

Health Physics, 2002
Several organizations have established guidelines for occupational exposure to power-frequency magnetic fields. At 60 hertz, exposure limits are 1.0 millitesla (mT) for the American Conference of Governmental Industrial Hygienists, 0.42 mT for the International Committee on Non-ionizing Radiation Protection, and 1.6 mT for the National Radiation ...
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Nonlinear response of the immune system to power-frequency magnetic fields

American Journal of Physiology-Regulatory, Integrative and Comparative Physiology, 2000
Studies of the effects of power-frequency electromagnetic fields (EMFs) on the immune and other body systems produced positive and negative results, and this pattern was usually interpreted to indicate the absence of real effects. However, if the biological effects of EMFs were governed by nonlinear laws, deterministic responses to fields could occur ...
A A, Marino, R M, Wolcott, R, Chervenak, F, Jourd'Heuil, E, Nilsen, C, Frilot   +5 more
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Power frequency magnetic field; depressive illness and myocardial infarction

Public Health, 1989
Surveys were made to determine whether susceptibility to depressive illness and to myocardial infarction of people living in Wolverhampton was related to the intensity of 50 Hz magnetic field outside their homes. Comparing case with control addresses it was found that the field strength was significantly higher for depressive illness (P = 0.033) but ...
S, Perry, L, Pearl, R, Binns
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Canceling the Power Frequency Magnetic and Electric Fields of Power Lines

IETE Journal of Education, 2013
AbstractMethods are presented for the cancellation of the power line's power frequency magnetic and electric fields at pre-specified points close to the line corridor. For canceling the magnetic field, the method is based on the use of three auxiliary conductors constituting two mitigating loops.
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Measurement of power frequency magnetic fields in different environments

2000 10th Mediterranean Electrotechnical Conference. Information Technology and Electrotechnology for the Mediterranean Countries. Proceedings. MeleCon 2000 (Cat. No.00CH37099), 2005
The power companies as well as the public are becoming increasingly interested in the possible link between exposure to power frequency magnetic fields and human health. Therefore, special attention is given to measurements of the magnetic field level and their comparison to the established or recommended limits according to national standards in ...
R. Sekerinska, V. Dimcev
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Power frequency magnetic fields and computer monitor instability

Displays, 1998
Owing to the increased use of electronic loads, the harmonic content of the magnetic field in buildings has increased and it is therefore of interest to study how the harmonics (i.e.
Monica Sandströma, Kjell Hansson Mild, Eugene Lyskova, Jonna Wilén   +3 more
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