W.E.E.P. News
Wireless Electrical and Electromagnetic Pollution News
South Africa - 45 neighbours harmed by cell phone mast
Migraines, maladies and masts
Tracy-Lee Dorny: 'This was our dream home. We have taken nine years to build it. It has been a haven, and a secure haven for us to live in.'
Tracy-Lee Dorny built high walls to keep her family safe in a city full of threats. She now claims that state of the art security measures can't protect her from the uninvited hazard that landed on her doorstep. An iBurst cell mast was installed in August last year.
Tracy-Lee: 'To watch this big piece of tower go up 30 metres from your bedroom window and know that that is going to be radiating through your home 24/7...'
See the video
http://beta.mnet.co.za/carteblanche/Article.aspx?Id=3838&ShowId=3
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New Procedure Could Speed Cell Phone Testing
Posted on: Friday, 5 March 2010, 08:10 CST
By accurately re-creating the jumbled wireless signal environment of a city business district in a special indoor test facility, researchers at the National Institute of Standards and Technology (NIST) have shown how the wireless industry could lop hours off the process of testing the capabilities of new cellular phones. The NIST techniques also could simulate complex real-world environments for design and test of other wireless equipment.
As described in a forthcoming paper,* NIST researchers conducted tests in downtown Denver, Colo., to measure precisely the clustering of signal reflections from radio waves bouncing off one or more multi-story buildings multiple times before reaching a distant receiver. The researchers replicated this environment indoors using a "reverberation chamber," a room with highly reflective surfaces and a big, slowly rotating paddle that automatically alters signal paths. First, researchers feed a wireless transmitter's signal into a device called a fading simulator, which is adjusted to re-create the timing and strength of the reflections of an outdoor urban area. The output then is fed into the reverberation chamber, where signal reflections decay exponentially over time, creating a cluster of signals similar to that observed in the field tests.
Industry certification of cell phones currently requires tests of parameters such as total radiated power using the opposite of a reverberation chamber, a room called an anechoic chamber that is lined with materials that absorb radio waves and reflect as little as possible. This testing takes about a day, requiring dozens of measurements of cell phone directional power from multiple angles. By contrast, an equivalent set of tests could be performed in about an hour in a reverberation chamber, according to NIST engineer Kate Remley, a senior author of the new paper. Reverberation chambers also could be used to measure cell phone receiver sensitivity, although currently there would be no time savings for this test, Remley says. Many industry testing practices are established by CTIA-The Wireless Association, the trade group representing the wireless industry.
NIST is studying new applications for reverberation chambers, which have typically been used to measure electronic equipment's immunity to radio-frequency interference. By adjusting the reflectivity of the chamber through selective use of signal-absorbing material, researchers have found they can "tune" the signal decay time to simulate the conditions found in real-world environments. NIST researchers expect the new method will be useful for test and design of wireless devices such as cell phones, notebook computers equipped with wireless links, as well as new technology such as wireless beacons being developed for the emergency responder community.
The Denver tests were conducted in 2009. NIST researchers measured the power delays between a transmitter and a distant receiver positioned on streets lined with buildings three floors high or taller and a flat, single-layer parking lot. Most buildings were constructed of glass, steel, and concrete.
* H. Fielitz, K.A. Remley, C.L. Holloway, Q. Zhang, Q. Wu and D.W. Matolak. Reverberation-chamber test environment for outdoor urban wireless propagation studies. IEEE Antennas and Wireless Propagation Letters. Forthcoming.
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Image Caption: NIST engineer Kate Remley (center) was part of a team that conducted wireless communications tests using several different technologies in downtown Denver in 2009. At left is Jeremy May, a participant in NIST's Summer Undergraduate Research Fellowship program, and David Matolak, a professor at Ohio University in Athens, Ohio. Credit: NIST
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Is Wireless Internet Technology Bad for Your Health?
March 7, 2010 at 4:29 am
What is WiFi?
It is possible, a somewhat informed opinion on the safety or potential risks of this new technology without actually form a physicist himself.
Quite simply, is Wi-Fi wireless technology used most often to people connected to the Internet in schools, cafes, hotels and other network addresses or mobile phone users connect with each connection. Wi-Fi is certainly convenient for travelers and students, but it is dangerous? Many believe thatThe low-level radiation of electromagnetic waves, which can by the wireless internet source for each individual user to cause an adverse effect on health, including cellular changes and possibly cancer in some cases.
The area of a Wi-Fi Internet connection is covered as a "hotspot" is known, this is the area in which the broadcast waves to the users to access the World Wide Web. It may extend over several miles, not even when the waves pass through treed areas.
While in the hotspot, a laptop userfor easy access to connect to the network and the Internet and check their e-mail or its other business on the run.
A wireless network uses radio waves to send communications over a two-way network. A computer's wireless adapter uses the Internet connection data in a radio wave and sends it to the wireless router – which works in your laptop. This process in the opposite direction, sending a radio signal back to the host computer.
Useful stations or hotspotsEnvironmental hazards?
Some report, issued an unusual sensitivity to the waves in these hotspots. Officially, the level of wireless electromagnetic radiation in the environment in a hotspot are well below recommended levels emitted and there is no evidence of risk to humans. But some people blame for everything, WiFi exposure of sleep disorders, headaches and blurred vision, heart and respiratory problems.
Since no study has ever shown a conclusive risk to human healthfrom exposure to these low-frequency radio transmissions, many simply shake off the complaints of these people who believe in choice, that their symptoms are coincidental or another by a spring.
So, how high the level of radiation in a hotspot? According to Dr. Michael Clark of the HPA, the published research on mobile phones and wireless networks does not indicate a risk to human health. "All the expert reviews done here and abroad show that it is unlikely that a health riskRisk of wireless networks, "he says." The few studies on mobile phone masts, which are observed in published peer-reviewed journals are entitled to health effects that are not at all conclusive. The real problem is deciding what level of caution is appropriate.
"When we conducted measurements in schools, typical exposures from WiFi are around 20 millionths of the international guideline levels of exposure to radiation. In contrast, a child receives on a cell phone up to 50% ofConductances. So a year sitting in a classroom near a wireless network is roughly equivalent to 20 minutes on a cell phone. If Wi-Fi should be taken from the schools, then the air should be closed, too – and FM radio and TV, the strength of their signals is similar to that of Wi-Fi in classrooms. "
Comments
1.
Martin Weatherall Said,
March 7, 2010 @ 10:30 am
Wi Fi radiation is not low level. I have measured several locations where it was being used and the readings were very high
Yes, Wi Fi is bad for your health! It emits and receives strong levels of microwave radiation. The health effects of microwave radiation have been known for over sixty five years when radar was first used during the Second World War.
To read about those adverse health effects go to http://www.bioinitiative.org and see the scientific evidence.
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Our homeland and our world has been invaded
http://www.buergerwelle.de:8080/helma/twoday/bwnews/stories/500/
Mobile: A huge biological experiment
http://www.buergerwelle.de:8080/helma/twoday/bwnews/stories/511/
Maine panel weighs cell phone cancer warning
http://www.buergerwelle.de:8080/helma/twoday/bwnews/stories/502/
Electrosensitivity: a first person perspective
http://www.buergerwelle.de:8080/helma/twoday/bwnews/stories/512/
San Francisco Cell-Phone Resolution
http://www.buergerwelle.de:8080/helma/twoday/bwnews/stories/508/
Are We Expecting Too Much of Ofcom?
http://www.buergerwelle.de:8080/helma/twoday/bwnews/stories/497/
Does the Government Adequately Protect Public Health?
http://www.buergerwelle.de:8080/helma/twoday/bwnews/stories/506/
EMF Radiation Poses Significant Emerging Risk for Insurers
http://www.buergerwelle.de:8080/helma/twoday/bwnews/stories/510/
TV watching may cause eye strain, but not myopia
http://www.buergerwelle.de:8080/helma/twoday/bwnews/stories/504/
Campaigners claim victory after Brierley Hill mast plan is refused
http://www.buergerwelle.de:8080/helma/twoday/bwnews/stories/505/
City Council Fined US$20000 a Day
http://www.buergerwelle.de:8080/helma/twoday/bwnews/stories/507/
O2 hangs up on phone mast proposal
http://www.buergerwelle.de:8080/helma/twoday/bwnews/stories/518/
Electronic problems that can cause car troubles
http://www.buergerwelle.de:8080/helma/twoday/bwnews/stories/493/
Cell phones and electromagnetic radiation a growing concern
http://www.buergerwelle.de:8080/helma/twoday/bwnews/stories/519/
Cancer expert tells how treatment can be problem
http://www.buergerwelle.de:8080/helma/twoday/bwnews/stories/516/
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