Gizmorama
March 30, 2011
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GENUINE LEATHER MEN'S TRIFOLD WALLET
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Good Morning,
The EPA test a large area of the U.S.' western coast, whose
air could have potentially been contaminated by radiation
from Japan's nuclear disaster, and their conclusion is apt
in laying America to rest about health concerns. You can find
details on this study in the third article.
Let's also remind ourselves that the U.S. conducted many
Nuclear Bomb test in New Mexico, for example, before a public
safety band was put into effects in 1960's. Fallout levels
(the dangerous effects of a nuclear reaction, which from an
atomic bomb are more-so if not comparably potent as the leak
in Japan) resonated for a hundred miles or so.
Until Next Time,
Erin
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Powerful X-rays are archaeological tool
DALLAS - Strong X-ray beams can be a tool in making striking
discoveries in archaeology, U.S. researchers say, by revealing
previously invisible features of artifacts. The technique,
described at the American Physical Society meeting in Dallas
last week, can illuminate layers of pigment beneath the sur-
faces of artifacts or even show traces of the tools used to
create them thousands of years ago, the BBC reported. Known
as X-ray fluorescence or XRF, the technique works by measuring
the after-effects of X-ray illumination. As atoms absorb the
X-rays, the rays' energy is redistributed, and some is re-
emitted as visible light. Since atoms of different elements
release a different, characteristic color of light, a full
chemical analysis of hidden layers can be revealed. Robert
Thorne of Cornell University and his collaborators were the
first to use the technique to analyze inscriptions from Greek
and Roman pottery. The technique has been used to shed light
on layers of glaze beneath the surface of finished pottery.
It has even revealed, in one case of an inscription worn en-
tirely away, that the tiny amounts of iron left by the chisel
showed a visible version of the wording on what appeared to
be smooth stone. "It's not a magic bullet -- there never is
in this business," Thorne said. "But I think as a general
tool for art and art historical and archaeological explor-
ation, it's the best new thing to come out in a very long
time."
Injection needle mimics mosquito bite
OSAKA, Japan - Japanese researchers say they've developed a
motorized hypodermic needle patterned after a mosquito's mouth
parts that hurts less than a conventional one. Seiji Aoyagi
at Kansai University in Osaka, Japan, said the needle mimics
a mosquito's proboscis, which is serrated and barely touches
the skin so you don't feel the initial bite, NewScientist.com
reported last week. A smooth, traditional hypodermic needle
leaves a lot of metal in contact with the skin, which stimu-
lates nerves and causes pain, Aoyagi said. His design could
help diabetic people who have to take frequent blood samples,
he said. Etched from silicon, the needle imitates a mosquito's
mobile mouth parts. The sections of the needle, vibrated by
small crystals, break the skin in the same sequence as they
do with a mosquito as observed under high-speed video micro-
scopes. Aoyagi has tested his needle on himself and three
volunteers, who say the pain is much less but lasts longer
than with a conventional syringe.
EPA: No radiation 'levels of concern'
WASHINGTON - The U.S. Environmental Protection Agency says
monitoring shows no radiation levels of concern have reached
the United States from the Japanese nuclear disaster. While
some results show levels slightly higher than those found by
EPA monitors last week and a Department of Energy monitor
the week before, these findings are to be expected in the
coming days and are still far below levels of public health
concern, an EPA release said Monday. The air samples analyzed
by the EPA came from monitoring stations in Alaska, Alabama,
California, Guam, Hawaii, Idaho, Nevada, Saipan, Northern
Mariana Islands and Washington state, the EPA said. Trace
amounts of radioactive isotopes consistent with the Japanese
nuclear incident were detected, the agency said. EPA scien-
tists would make ongoing detailed analysis of filter results
from the air monitoring stations, it said. Massachusetts
public health officials say small amounts of radiation have
been detected in a sample of state rainwater, as well, though
they say drinking water is not endangered. Similar levels of
radiation in rainwater samples have been found in other
states, including California, Washington, and Pennsylvania.
Texas site points to earliest Americans
COLLEGE STATION, Texas - Evidence from a Texas archaeological
site proves people lived in the region as much as 2,500 years
earlier than previously believed, researchers say. Archaeo-
logists from Texas A&M University say evidence found about 40
miles northwest of Austin is the oldest sign of human occupa-
tion in Texas and North America, a university release reported
Thursday. The evidence pushes back the date for the earliest
inhabitants of North America to about 15,500 years ago, the
researchers said. The artifacts were found in buried deposits
next to a small spring-fed stream, they said. "Most of these
are chipping debris from the making and resharpening of tools,
but over 50 are tools," Michael Waters of Texas A&M's Center
for the Study of First Americans said. "There are bifacial
(two-sided) artifacts that tell us they were making projectile
points and knives at the site." Studies have shown the site
is undisturbed and the artifacts give solid evidence of when
early people arrived at the site, researchers said. "This
discovery challenges us to re-think the early colonization
of the Americas," Water said. "There's no doubt these tools
and weapons are human-made and they date to about 15,500
years ago, making them the oldest artifacts found both in
Texas and North America."
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