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Copyright © 2012, Campbell R. Harvey. All Rights Reserved.


A unit of length used in printing. An em is one-sixth of an inch. It is also called a pica.
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References in periodicals archive ?
Countless research studies concerning the impact of electromagnetic radiation of diverse parameters on the matter prove the negative effect of this factor on health and life of living organisms.
Previous studies have suggested that radio-frequency electromagnetic radiation (RF-EMR) emitted by the devices can have a detrimental effect on male fertility.
The idea for Wireless Armour was born from founder Joseph Perkins' personal experiences with technology and the realisation that between his laptop, mobile and tablet he was exposing himself to a huge amount of electromagnetic radiation, concentrated mostly around his groin area.
The studies of China University of Mining Technology significantly advanced the understanding of electromagnetic radiation caused by friction of coal [7, 8].
"We have released a comprehensive guide that covers all aspects of telecom towers, including their design, selection of site, installation and operation, requirements to get environmental permission in addition to the safe exposure limits for electromagnetic radiation frequencies," said Hind Mahmoud, Head of Environmental Studies and Planning Section of Environment Department at DM.
The text does not address the long-term biophysical effects that can result from exposure to electromagnetic radiation, since there is currently no compelling evidence to establish a cause-and-effect relationship.
Conference on Electromagnetic Radiation from Pulsars and Magnetars (2012: Zielona Gora, Poland) Ed.
The Bio-initiative Report was a response to the mantra that "We have no convincing conclusive consistent evidence that electromagnetic fields and electromagnetic radiation are harmful below current guidelines".
The article includes specific measures for reducing exposure to electromagnetic radiation from cell phones, cordless phones, computers, handheld electronics (electric toothbrush, hair dryer, smartphone, electronic tables, etc.), fluorescent lights, household power, high-voltage power lines, and transmission towers and emitters.
Gansu now has nearly 2,900 radioactive sources, more than 1,000 radioactive facilities and rapidly increasing exposure to electromagnetic radiation. (Xinhua-ANI)
Because more and more devices on vehicles and in support base areas are producing radio frequencies (RFs), extra care is needed with the hazards of electromagnetic radiation to ordnance (HERO).
As I wrote in "Ask Natural Life" column in our January/February 2008 issue (and updated in the website version in August 2010), the danger of electromagnetic radiation (EMR) is controversial--somewhat like secondhand tobacco smoke was not all that long ago.

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