Exposure to EMF’s at Work September 10, 2006Posted by healthyself in .03 - 3.7 mG, .5 mG - 4 MG, 1 mG, 2 mG, 27.6 mG, 34.8 mG, 4.4 mG, 5.4 mG, 8.2 mG, 96.0 mG, Blogroll, Cell phone safety, Electrical Surges, Electrical Wiring, Electromagnetic pollution, Electromagnetic waves, Electrosensitivity, Electrosmog, ELF, EMF Research, EMF's, Employees, EMR, Environment, Exposure, Firehouses, Long Term Health Risks, Low Frequencies, Magnetic, Men's Health, Microwave exposure, Police Officers, Pulsed Radiation, radiation, Risk of Disease, Safety, School administrators, transmission, Who is Affected?, Women's Health, Workplace.
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“The EMF exposures for many jobs have not been measured, but the following table shows average exposures to magnetic fields for typical workers who use electric equipment. Exposures during a work shift vary with the strength of the magnetic field, the worker s distance from the EMF source, and the time the worker spends in the field. For comparison, the table also lists worker exposures off the job.”
“Average magnetic field exposures for various types of workers (in milligauss*)”
Average daily exposures Type of worker Median** Range
Workers on the job:
Clerical workers without computers 0.5 0.2 - 2.0 Clerical workers with computers 1.2 0.5 - 4.5 Machinists 1.9 0.6 - 27.6 Electric line workers 2.5 0.5 - 34.8 Electricians 5.4 0.8 - 34.0 Welders 8.2 1.7 - 96.0 Workers off the job (home, travel, etc.) 0.9 0.3 - 3.7
*Magnetic fields are often measured in gauss or milligauss (one thousandth of a gauss = 1 milligauss).
**The median is the middle measurement: half the workers have average daily exposures above this point and half below.”
How do Cell Phones-in Cities-Work? September 7, 2006Posted by healthyself in 2.4 GHz, 5 GHz, Biological Effects, Blogroll, Cell phone industry, Cell phone safety, Cell phone towers, Cell Phones, Definitions, Electromagnetic pollution, Electromagnetic waves, Electrosensitivity, Emergency Medicine, EMF Research, EMF's, EMR, Environment, Firehouses, High Frequencies, high voltage transmission lines, HOuseholds, Hz, Legal Issues, Lifestyle, Long Term Health Risks, Low Frequencies, Men's Health, MHz, Microwave exposure, mobile telephones, Monitoring, Public Policy, Pulsed Radiation, radiation, Risk of Disease, Safe Levels, School administrators, Transfer, transmission, Who is Affected?, Women's Health, Workplace.
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“The frequencies used by cellphones are in the line-of-sight range. So how do they work in cities? The answer is a combination of the following effects:
- r-4 propagation over the rooftop landscape
- diffraction into the ‘street canyon’ below
- multi-path reflection along the street
- diffraction through windows, and attenuated passage through walls, into the building
- reflection, diffraction, and attenuated passage through internal walls, floors and ceilings within the building
The combination of all these effects makes the cellphone propagation environment highly complex…”