Browsed by
Tag: electromagnetic fields

Impact of EMF Exposure Limits and MRI

Impact of EMF Exposure Limits and MRI

Articles, by Professor J.C. Lin of the University of Illinois in Chicago, highlighting ICNIRP’s role in establishing limits for EMF exposure during MRI procedures were published in IEEE periodicals Microwave Magazine, vol. 12, no. 4, pp. 46-56, June 2011, and in Antennas and Propagation Magazine, vol. 53, no. 1, pp. 169-174, Feb.2011.  The articles provide useful information but do not tell the whole story regarding low frequency exposure limits, specifically recognition of the work of Read more [...]
Are Cellphones really dangerous?

Are Cellphones really dangerous?

The declaration from International Agency for Research on Cancer that cellphone emissions are possibly carcinogenic is not only old "news" but it is not scientifically substantiated.  The conclusion IARC reached was based on a review of a set of published articles evaluating the effects of electromagnetic emissions on biological cells or animals.  Their classification would put cellphones in the category that includes the pesticide DDT and gasoline engine exhaust, and even caffine Read more [...]
RESEARCHERS MISLEADING PUBLIC ON RISKS OF EMF

RESEARCHERS MISLEADING PUBLIC ON RISKS OF EMF

In a statement issued on 2 June 2010, the Institution of Engineering and Technology (IET) has released an updated position statement concluding overall that "the balance of scientific evidence to date still does not indicate that harmful effects occur in humans due to low-level exposure to EMFs."  EMF stands for Electric and Magnetic Fields, which are, as described by the National Institute of Environmental Health Sciences (NIEHS), “invisible lines of force associated with the Read more [...]
Lighting industry position on light at night and biological factors forthcoming

Lighting industry position on light at night and biological factors forthcoming

The NEMA Lighting Systems Division is concerned over numerous recent efforts to raise awareness of light at night and potentially related effects on biological processes.  While many of these are well-intended, they often fall short of being credible, and could do more harm than good.  There are many instances where lighting at night is favored and desired for safety and aesthetics, and ultimately NEMA lighting manufacturers wouldn't sell products if they weren't in demand.  Read more [...]
NEMA Addresses SSL Dimming Challenges

NEMA Addresses SSL Dimming Challenges

The NEMA Lighting Controls and Solid State Lighting Sections have co-produced a white paper on the subject of dimming screw-base integrated ballast LED lamps. It is designated LSD-49 and is titled "Solid State Lighting for Incandescent Replacement—Best Practices for Dimming". NEMA and the SSL industry hope that by issuing guidance as early as possible on this subject, SSL technology can avoid the pitfalls associated with less than compatible self-ballasted CFL and Dimmer combinations. Read more [...]
Press the EMP Key

Press the EMP Key

A nuclear explosion outside the earth's atmosphere produces an electromagnetic pulse (EMP). While there has been recent Hill, media, and fictional attention on the subject, EMPs have been a threat since the nuclear age. The grid does have certain vulnerabilities, and this post outlines what is (or isn't) at risk from EMP damage. While heavy power system assets such as switches and transformers are largely immune to immediate EMP interference, EMP-induced surge currents could overwhelm some Read more [...]
Mooove Over Health Concerns, Power Lines Affect Milking Cows

Mooove Over Health Concerns, Power Lines Affect Milking Cows

In a "hot off the presses" article, "Of Cows and Power Lines" in the Institute of Electrical and Electronic Engineers "Spectrum" magazine, the reporter states researchers have found a link between which direction cows face and the presence of power lines over or near the feeding grounds.  There is no obvious reason why this should be considered critical information for cattle ranchers and dairy farmers. I do not have research data, but I Read more [...]