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Posts Tagged ‘radiation’

Voyager Probes Give Us ET’s View

December 1st, 2011 12:52 admin View Comments

Space

astroengine writes “For the first time, scientists have been able to measure a type of radiation streaming out from the Milky Way that in other galaxies has been linked to the birthplaces of young, hot stars. There was no way to make our own galaxy’s measurement of the radiation, known as Lyman-alpha, until the Voyager probes were about 40 times as far away from the sun as Earth — any closer and the solar system’s own emissions drowned out the fainter glow from the galaxy.”

Source: Voyager Probes Give Us ET’s View

New Study: Fukushima Released Twice as Much Radiation as Official Estimate Claimed

October 28th, 2011 10:56 admin View Comments

New Study: Fukushima Released Twice as Much Radiation as Official Estimate Claimed

October 28th, 2011 10:56 admin View Comments

Ask Slashdot: Radiation Detection For Tokyo Resident?

October 21st, 2011 10:36 admin View Comments

Japan

An anonymous reader writes “I’m an American who is living in Tokyo. Stories have started popping up about ‘radiation hot spots’ in Tokyo and surrounding prefectures so I have begun to worry. I live on the first floor of my apartment building and right by our washing machine there is a gutter out there that is clogged with rain water and mud, which has me especially worried because my wife and I are planning to have kids soon. Obviously no one from the government is going to come by to check our gutter so I feel the need to take matters into my own hands. I have absolutely no idea so I’m asking you guys. What kind of radiation detector should I get? A Geiger Counter? If it measures Gamma rays is that enough? Are alpha and beta dangerous too? I know no one has all the answers regarding radiation but any advice you guys could give me would be great.”

Source: Ask Slashdot: Radiation Detection For Tokyo Resident?

150th Anniversary of Greenhouse Climate Theory

September 28th, 2011 09:08 admin View Comments

Earth

An anonymous reader writes “It was 150 years ago that John Tyndall, one of history’s truly great physicists, published a scientific paper with the far-from-snappy title On the Absorption and Radiation of Heat by Gases and Vapours, and on the Physical Connexion of Radiation, Absorption, and Conduction. The BBC has an article on John Tyndall and his contributions 150 years ago to the physics behind the study of climate change.”

Source: 150th Anniversary of Greenhouse Climate Theory

EPIC Uncovers: Mobile Scanners Not ‘Certified People Scanners’

September 1st, 2011 09:02 admin View Comments

Government

OverTheGeicoE writes “The Electronic Privacy Information Center received more FOIA documents from the U.S. Department of Homeland Security regarding mobile x-ray scanners (a.k.a. Z Backscatter Vans). We’ve discussed these devices befor. Perhaps the most interesting part is slide #11 (‘Disclaimer About Scanning People’) on page 6 of this PDF explaining that the radiation output of these devices is too high to comply with ANSI N43.17. In other words, they output too much radiation even by TSA’s questionable standards for airport body scanners. Regardless, the slide ends with the author stating that the ANSI standard ‘is not applicable to covert operations.’ What might that assertion have meant to the presentation’s intended audience?”

Source: EPIC Uncovers: Mobile Scanners Not ‘Certified People Scanners’

First Observational Test of the “Multiverse”

August 3rd, 2011 08:10 admin View Comments

United Kingdom

An anonymous reader writes “The theory that our universe is contained inside a bubble, and that multiple alternative universes exist inside their own bubbles – making up the ‘multiverse’ – is being tested observationally by UK physicists, who are searching for disk-like collision patterns in the cosmic microwave background (CMB) radiation. Though CMB is generally thought of as a uniform schmear of radiation extending in all direction in our universe, in fact, they say, if a multiverse exists, there ought to be imprints, trapped in the muck like footprints, of where our universe banged into others.”

Source: First Observational Test of the “Multiverse”

X-rays For Stargazing Turn Into Cancer Treatment

July 26th, 2011 07:10 admin View Comments

Medicine

derGoldstein writes “Discovery posted an interesting story of how X-rays that are used by astronomers for determining the various chemical abundances inside stars could also potentially be used for more effective radiation therapy: ‘Radiation treatment is a coarse instrument at best, since it destroys surrounding healthy cells as well as cancerous tumors. Much research is underway for targeted methods to reduce the collateral damage and attack just the cancer cells, including embedding nanoparticles inside tumors … Nahar and Pradham envision a prototype device capable of generating x-rays at the key frequencies to trigger a flood of low-energy electrons in platinum and gold, based on their computer simulations. Gold or platinum nanoparticles would amass naturally in cancerous tumors in the body, and could then be zapped with the focused x-ray beam.’”

Source: X-rays For Stargazing Turn Into Cancer Treatment

Brain Cancer Worries? Look Up Your Phone’s SAR

June 3rd, 2011 06:26 admin View Comments

Cellphones

CWmike writes “With recent news of a possible link between cell phone radiation and risk of brain cancer, you may have a new-found interest in knowing how much radiation your mobile handset is giving off — or, more importantly, how much your body might be absorbing. The FCC’s legal limit for mobile phones is 1.6 Watts of radiofrequency energy per kilogram, using a measure called Specific Absorption Rate (SAR). The Environmental Working Group, which tracks SAR data for more than 1,300 cell phone and smartphone models, notes that several factors besides your handset affect your actual level of exposure. Look up your phone’s SAR; or see a full chart of phones.” And relax — have a coffee.

Source: Brain Cancer Worries? Look Up Your Phone’s SAR

Senior Citizens Lining Up to Tackle Fukushima

May 31st, 2011 05:29 admin View Comments

Image

Some have compared them to kamikazes, but the more than 200 elderly volunteers who want clean up the Fukushima power station say they are just being practical. 72-year-old retired engineer Yasuteru Yamada says: “I am 72 and on average I probably have 13 to 15 years left to live. Even if I were exposed to radiation, cancer could take 20 or 30 years or longer to develop. Therefore us older ones have less chance of getting cancer.” So far the government is hesitant to let the volunteers into the power station but Yamada and the others have been lobbying for the right to aid in the clean up. He says: “At this moment I can say that I am talking with many key government and Tepco people. But I am sorry I can’t say any more at this moment. It is on the way but it is a very, very sensitive issue politically.”

Source: Senior Citizens Lining Up to Tackle Fukushima

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