শুক্রবার, ৩১ মে, ২০১৩

Tumblr Brings More Ads To Users' Dashboards, Rearranges Buttons & Teens Freak Out

tumblr logoA month after Tumblr introduced sponsored posts into its native mobile applications, the company is today bringing those same brand advertisements to its web dashboard. Launch partners for these new "Sponsored Web Posts," as they're called, include?Viacom, Ford Motor Company, Universal Pictures, Capital One, AT&T, Denny's and Purina. Tumblr users will be able to reblog, like, follow and share these ads and the brands themselves directly from their web dashboard, which of course, is what we know all the Tumblr-lovin' teens are just dying to do. Like Tumblr's sidebar "Radar" ads, the new sponsored posts will be marked with an animated dollar sign icon to indicate that they are paid placements.

Source: http://feedproxy.google.com/~r/Techcrunch/~3/O1PYozfyQio/

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Rounded stones on Mars evidence of flowing water

May 30, 2013 ? Observations by NASA's Mars rover Curiosity have revealed areas with gravel and pebbles that are characteristic of a former riverbed. Researchers, including members of the Niels Bohr Institute, have analysed their shapes and sizes and the rounded pebbles clearly show that there has been flowing water on Mars. The results are published in the scientific journal, Science.

The Mars rover's stereo camera took pictures of a few areas with densely packed pebbles, cemented together like concrete. The image field of an area named Hottah was a mosaic of approximately 1.4 meters x 80 centimeters. But when the picture is taken at an angle from the camera arm's two meter high mast down towards the ground-level, it gives a slightly distorted view in which the size of the rocks depend on their location in the image frame. To remedy this, the researcher first had to process the image so the proportions are comparable.

"Next, we divided the image into smaller fields of 10 mm and analysed the gravel, which consists of coarse grains of sand around 1/3 mm. We examined the pebbles which are between 4 and 40 mm in greater detail. Altogether we made a thorough analysis of 515 pebbles," explains Asmus Koefoed, a research assistant in the Mars Group at the Niels Bohr Institute at the University of Copenhagen.

Smooth, rounded stones

When rocks are worn by the wind, they become angular and rough -- similar to the result of sandblasting. When rocks are moving in flowing water, they are worn down in a completely different way. They tumble around in a mixture of water and sand bumping into each other and the corners and edges of the rocks eventually become smooth and rounded.

"We could see that almost all of the 515 pebbles we analysed were worn flat, smooth and round. We have classified them according to their geometry, which can be described using a single number -- the 'Corey shape factor', where 0 describes rocks that are completely flat like a piece of paper and 1 means they are perfect spheres," explains Asmus Koefoed.

There are both light and dark rocks in various shades and colours -- much like the original rocks on Earth and Mars. Densely packed deposits were formed locally, which occur when fine sand and mud flow along with the gravel and pebbles. This all clumps together into something that can harden into a concrete-like substance, a conglomerate. The solid sediments have then subsequently been worn flat on the top by wind-borne sand particles that flowed past the conglomerate during events of very strong wind.

Current like a Danish stream

The new results are interesting because they tell us about the climate history of Mars. What would it take to cause the stones to look like they do?

"In order to have moved and formed these rounded pebbles, there must have been flowing water with a depth of between 10 cm and 1 meter and a flow rate of about 1 meter per second -- or 3.6 km/h -- slightly faster than a typical natural Danish stream," explains Morten Bo Madsen, head of the Mars research group at the Niels Bohr Institute.

So it has not just been sporadic flowing water that evaporates quickly, but prolonged warmer periods where the streams were active. There was probably a higher atmospheric pressure on the planet than today, where the pressure is below about 1000 Pascal, about one percent of the Earth's atmospheric pressure. This means that the planet must have had a denser atmosphere, which caused a greater surface pressure than today.

Until now, it was believed that the warm period on mars was as far back as 3.5-3.7 billion years ago, but with the new studies it is now believed that this period may have extended to only 2-3 billion years ago.

Mars has thus been a dynamic place, which would not have been totally inhospitable to life, as we know it on Earth. Apart from running water recent investigations with Curiosity have shown that there were a pH-neutral environment and minerals that microbial life could use for nourishment.

Curiosity has thus achieved one of its objectives, namely to investigate whether there are areas on Mars, which could have been habitable for microbial life.

Source: http://feeds.sciencedaily.com/~r/sciencedaily/~3/iFvh6rPHdsg/130530142011.htm

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Comet ISON is hurtling toward uncertain destiny with Sun

May 30, 2013 ? A new series of images from Gemini Observatory shows Comet C/2012 S1 (ISON) racing toward an uncomfortably close rendezvous with the Sun. In late November the comet could present a stunning sight in the twilight sky and remain easily visible, or even brilliant, into early December of this year.

The time-sequence images, spanning early February through May 2013, show the comet's remarkable activity despite its current great distance from the Sun and Earth. The information gleaned from the series provides vital clues as to the comet's overall behavior and potential to present a spectacular show. However, it's anyone's guess if the comet has the "right stuff" to survive its extremely close brush with the Sun at the end of November and become an early morning spectacle from Earth in early December 2013.

When Gemini obtained this time sequence, the comet ranged between roughly 455-360 million miles (730-580 million kilometers; or 4.9-3.9 astronomical units) from the Sun, or just inside the orbital distance of Jupiter. Each image in the series, taken with the Gemini Multi-Object Spectrograph at the Gemini North telescope on Mauna Kea, Hawai'i, shows the comet in the far red part of the optical spectrum, which emphasizes the comet's dusty material already escaping from what astronomers describe as a "dirty snowball." Note: The final image in the sequence, obtained in early May, consists of three images, including data from other parts of the optical spectrum, to produce a color composite image."

The images show the comet sporting a well-defined parabolic hood in the sunward direction that tapers into a short and stubby tail pointing away from the Sun. These features form when dust and gas escape from the comet's icy nucleus and surround that main body to form a relatively extensive atmosphere called a coma. Solar wind and radiation pressure push the coma's material away from the Sun to form the comet's tail, which we see here at a slight angle (thus its stubby appearance).

Discovered in September 2012 by two Russian amateur astronomers, Comet ISON is likely making its first passage into the inner Solar System from what is called the Oort Cloud, a region deep in the recesses of our Solar System, where comets and icy bodies dwell. Historically, comets making a first go-around the Sun exhibit strong activity as they near the inner Solar System, but they often fizzle as they get closer to the Sun.

Sizing up Comet ISON

Astronomer Karen Meech, at the University of Hawaii's Institute for Astronomy (IfA) in Honolulu, is currently working on preliminary analysis of the new Gemini data (as well as other observations from around the world) and notes that the comet's activity has been decreasing somewhat over the past month.

"Early analysis of our models shows that ISON's brightness through April can be reproduced by outgassing from either carbon monoxide or carbon dioxide. The current decrease may be because this comet is coming close to the Sun for the first time, and a "volatile frosting" of ice may be coming off revealing a less active layer beneath. It is just now getting close enough to the Sun where water will erupt from the nucleus revealing ISON's inner secrets," says Meech.

"Comets may not be completely uniform in their makeup and there may be outbursts of activity as fresh material is uncovered," adds IfA astronomer Jacqueline Keane. "Our team, as well as astronomers from around the world, will be anxiously observing the development of this comet into next year, especially if it gets torn asunder, and reveals its icy interior during its exceptionally close passage to the Sun in late November."

NASA's Swift satellite and the Hubble Space Telescope (HST) have also imaged Comet ISON recently in this region of space. Swift's ultraviolet observations determined that the comet's main body was spewing some 850 tons of dust per second at the beginning of the year, leading astronomers to estimate the comet's nucleus diameter is some 3-4 miles (5-6 kilometers). HST scientists concurred with that size estimate, adding that the comet's coma measures about 3100 miles (5000 km) across.

The comet gets brighter as the outgassing increases and pushes more dust from the surface of the comet. Scientists are using the comet's brightness, along with information about the size of the nucleus and measurements of the production of gas and dust, to understand the composition of the ices that control the activity. Most comets brighten significantly and develop a noticeable tail at about the distance of the asteroid belt (about 3 times the Earth-Sun distance -- between the orbits of Mars and Jupiter) because this is when the warming rays of the Sun can convert the water ice inside the comet into a gas. This comet was bright and active outside the orbit of Jupiter -- when it was twice as far from the Sun. This meant that some gas other than water was controlling the activity.

Meech concludes that Comet ISON "?could still become spectacularly bright as it gets very close to the Sun" but she cautions, "I'd be remiss, if I didn't add that it's still too early to predict what's going to happen with ISON since comets are notoriously unpredictable."

A Close Encounter

On November 28, 2013, Comet ISON will make one of the closest passes ever recorded as a comet grazes the Sun, penetrating our star's million-degree outer atmosphere, called the corona, and moving to within 800,000 miles (1.3 million km) of the Sun's surface. Shortly before that critical passage, the comet may appear bright enough for expert observers using proper care to see it close to the Sun in daylight.

What happens after that no one knows for sure. But if Comet ISON survives that close encounter, the comet may appear in our morning sky before dawn in early December and become one of the greatest comets in the last 50 years or more. Even if the comet completely disintegrates, skywatchers shouldn't lose hope. When Comet C/2011 W3 (Lovejoy) plunged into the Sun's corona in December 2011, its nucleus totally disintegrated into tiny bits of ice and dust, yet it still put on a glorious show after that event.

The question remains, are we in for such a show?

Comet ISON: The View from the North and South

Regardless of whether Comet ISON becomes the "Comet of the Century," as some speculate, it will likely be a nice naked-eye and/or binocular wonder from both the Northern and Southern Hemispheres in the weeks leading up to its close approach with the Sun.

By late October, the comet should be visible through binoculars as a fuzzy glow in the eastern sky before sunrise, in the far southeastern part of the constellation of Leo. By early November, the comet should be a much finer binocular object. It will steadily brighten as it drifts ever faster, night by night, through southern Virgo, passing close to the bright star Spica. It is during the last half of the month that observations will be most important, as the comet edges into Libra and the dawn, where it will brighten to naked-eye visibility and perhaps sport an obvious tail.

The comet reaches perihelion (the closest point in its orbit to the Sun) on November 28th, when it will also attain its maximum brightness, and perhaps be visible in the daytime. If Comet ISON survives perihelion, it will swing around the Sun and appear as both an early morning and early evening object from the Northern Hemisphere. The situation is less favorable from the Southern Hemisphere, as the comet will set before the Sun in the evening and rise with the Sun in the morning.

By December 10th, and given that everything goes well, Comet ISON may be a fine spectacle in the early morning sky as viewed from the Northern Hemisphere. Under dark skies, it may sport a long tail stretching straight up from the eastern horizon, from the constellations of Ophiuchus to Ursa Major. The comet will also be visible in the evening sky during this time but with its tail appearing angled and closer to the horizon.

Source: http://feeds.sciencedaily.com/~r/sciencedaily/~3/s2BF2WQWkTQ/130530111307.htm

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বৃহস্পতিবার, ৩০ মে, ২০১৩

Ketamine cousin rapidly lifts depression without side effects, study suggests

May 30, 2013 ? GLYX-13, a molecular cousin to ketamine, induces similar antidepressant results without the street drug side effects, reported a study funded by the National Institute of Mental Health (NIMH) that was published last month in Neuropsychopharmacology.

Major depression affects about 10 percent of the adult population and is the second leading cause of disability in U.S. adults, according to the World Health Organization. Despite the availability of several different classes of antidepressant drugs such as selective serotonin reuptake inhibitors (SSRIs), 30 to 40 percent of adults are unresponsive to these medications. Moreover, SSRIs typically take weeks to work, which increases the risk for suicide.

Enter NMDA (N-methyl-D-aspartate) receptor modulators. In the 1970s, researchers linked the receptors to learning and memory. Biotech and pharmaceutical companies in the 1980s attempted to apply chemical blockers to these receptors as a means to prevent stroke. But blocking these receptors led to the opposite effect -- --the rise of cardiovascular disease. Research in the field dampened until a glutamate receptor antagonist already approved for anesthesia, and known on the streets as "Special K," ketamine, made headlines in the early 2000s. Human clinical studies demonstrated that ketamine can ward off major and bipolar depressive symptoms within 2 hours of administration and last for several days. Ketamine is fraught with serious side effects including excessive sleepiness, hallucinations, and substance abuse behavior.

"Ketamine lit the field back up," said Joseph Moskal, Ph.D., a molecular neurobiologist at Northwestern University and senior study author. "Our drug, GLYX-13, is very different. It does not block the receptor ion channel, which may account for why it doesn't have the same side effects."

Moskal's journey with GLYX-13 came about from his earlier days as a Senior Staff Fellow in NIMH's Intramural Research Program. While at NIMH, he created specific molecules, monoclonal antibodies, to use as new probes to understand pathways of learning and memory. Some of the antibodies he created were for NMDA receptors. When he moved to Northwestern University, Moskal converted the antibodies to small protein molecules. Composed of only four amino acids, GLYX-13 is one of these molecules.

Previous electrophysiological and conditioning studies had suggested that GLYX-13, unlike ketamine, enhanced memory and learning in rats, particularly in the brain's memory hub or hippocampus. GLYX-13 also produced analgesic effects. Using several rat behavioral and molecular experiments, Moskal's research team tested four compounds: GLYX-13, an inactive, "scrambled" version of GLYX-13 that had its amino acids rearranged, ketamine, and the SSRI fluoxetine.

Results of the Study

GLYX-13 and ketamine produced rapid acting (1 hour) and long-lasting (24 hour) antidepressant-like effects in the rats. Fluoxetine, an SSRI that typically takes from 2-4 weeks to show efficacy in humans, did not produce a rapid antidepressant effect in this study. As expected, the scrambled GLYX-13 showed no antidepressant-like effects at all. The researchers observed none of the aforementioned side effects of ketamine in the GLYX-13-treated rats.

Protein studies indicated an increase in the hippocampus of the NMDA receptor NR2B and a receptor for the chemical messenger glutamate called AMPA. Electrophysiology studies in this brain region showed that GLYX-13 and ketamine promoted long-lasting signal transmission in neurons, known as long-term potentiation/synaptic plasticity. This phenomenon is essential in learning and memory. The researchers propose how GLYX-13 works: GLYX-13 triggers NR2B receptor activation that leads to intracellular calcium influx and the expression of AMPA, which then is responsible for increased communication between neurons.

These results are consistent with data from a recent Phase 2 clinical trial, in which a single administration of GLYX-13 produced statistically significant reductions in depression scores in patients who had failed treatment with current antidepressants. The reductions were evident within 24 hours and persisted for an average of 7 days. After a single dose of GLYX-13, the drug's antidepressant efficacy nearly doubled that seen with most conventional antidepressants after 4-6 weeks of dosing. GLYX-13 was well tolerated and it did not produce any of the schizophrenia-like effects associated with other NMDA receptor modulating agents.

Significance

NMDA receptors need a molecule each of the amino acid chemical messengers glutamate and glycine to become activated. Moskal speculates that GLYX-13 either directly binds to the glycine site on the NMDA receptor or indirectly modulates how glycine works with the receptor. Resulting activation of more NMDA and AMPA receptors leads to an increase in memory, learning -- and antidepressant effects. By contrast, ketamine only blocks the NMDA receptor, but also increases the activity of the AMPA receptor. Knowledge of these mechanisms could lead to the development of more effective antidepressants.

What's Next

GLYX-13 is now being tested in a Phase 2 repeated dose antidepressant trial, where Moskal and his colleagues at Naurex, Inc., a biotechnology company he founded, hope to find in humans the optimal dosing for the drug. They also want to see if this molecule, and others like it, regulate other NMDA receptor subtypes -- there are over 20 of them -- and whether it will work on other disorders, such as schizophrenia, attention-deficit hyperactivity disorder, and autism.

"One could call NMDA modulators such as GLYX-13 'comeback kids,'" said Moskal. "A toolkit that I developed in 1983 is now setting the stage in 2013 for the development of possible new therapeutics that may provide individuals suffering from depression with a valuable new treatment option."

Source: http://feeds.sciencedaily.com/~r/sciencedaily/most_popular/~3/MYRyi6xHDhE/130530170052.htm

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Lawyer: London murder suspect was freed in Kenya on British advice

By Joseph Akwiri

MOMBASA, Kenya (Reuters) - A Kenyan lawyer who in 2010 represented a man suspected of hacking a British soldier to death in London last week said on Wednesday the suspect was freed from arrest in Kenya three years ago on the recommendation of the British High Commission.

Britain's authorities face questions about what they knew about the activities of two Britons of Nigerian descent suspected of butchering Lee Rigby, a 25-year-old veteran of the Afghan war, in broad daylight in a London street.

The two men, one of whom, Michael Adebolajo, was arrested in Kenya in 2010 for allegedly trying to join an Islamist militant group, said they killed Rigby in the name of Islam. The killing has provoked an anti-Muslim backlash in multi-racial Britain.

Wycliffe Makasembo, who was the lawyer for Adebolajo at the time of his 2010 arrest in the tourist town of Lamu, said Kenyan anti-terrorism police detained him and six others when they tried to travel north to Somalia in a speedboat.

They were suspected of attempting to go to train with the al Qaeda-linked Islamist militant group al Shabaab in Somalia, and were presented in a court in Mombasa, south of Lamu.

Makasembo told Reuters that Kenyan police at the time sought more information about Adebolajo, a 28-year-old British-born convert from a Christian Nigerian family, from the British High Commission in Nairobi.

He added the British diplomatic mission replied in a letter to the police that "gave a clean bill of health that Michael Adebolajo had no criminal record or any connection with any criminal or terrorist organization in the world".

"Our own intelligence in Kenya were reluctant to release him, but it is the British High Commission which recommended that the suspect be released," Makasembo said, adding he had seen the letter at the time of the court appearance.

Adebolajo was deported back to Britain and the other six, all Kenyans, were also released without charge.

Asked about the Kenyan lawyer's remarks, a spokesman for the Foreign and Commonwealth Office in London on Wednesday declined to comment on them specifically.

"We can confirm that a British national was arrested in Kenya in 2010 and the FCO provided consular assistance as normal for British nationals," the spokesman said.

Police shot and wounded Rigby's assailants at the scene of the crime in London.

KENYA "NOT TO BLAME"

Sources close to the investigation have told Reuters the attackers were known to Britain's MI5 internal security service. Adebolajo had handed out radical Islamist pamphlets, but neither of the two men was considered a serious threat, sources said.

That has intensified calls for Britain's spy agencies to explain what they knew about the suspects and whether they could have done more to prevent Rigby's killing.

Britain's ITV News channel reported that Adebalajo -- who went by the nickname Mujahid, or warrior, after taking up Islam as a teenager -- and his family were approached by security services MI5 and MI6 who tried to recruit him as an informant.

It quoted his brother in law, James Thompson, as saying Adebolajo changed dramatically after his detention in Kenya where he said he was tortured and felt abandoned by his government.

Lawyer Makasembo said Kenya was "not to blame" for the London killing. "It is the British themselves who defended him from our law enforcers ... Had he been charged here, the killing of the British soldier would never have occurred," he said.

Police have arrested 10 people in connection to the murder. The second man shot and arrested at the scene of the crime, Michael Adebowale, 22, was discharged from hospital on Monday and moved into police custody where he was arrested on a separate charge of the attempted murder of a police officer.

The murder has galvanized Britain's small but noisy far-right movement, with more than 1,000 protesters shouting "Muslim killers, off our streets" marching through central London on Monday.

(Additional reporting by Maria Golovnina in London; Writing by James Macharia; Editing by Pascal Fletcher and Giles Elgood)

Source: http://news.yahoo.com/kenya-lawyer-says-london-murder-suspect-freed-british-185037948.html

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Deputy shoots, kills woman at Va. Costco store

STERLING, Va. (AP) ? A female worker at a northern Virginia Costco store who authorities say went at two sheriff's deputies with a knife and scissors has been fatally shot.

The shooting occurred about 3 p.m. Wednesday. Two Loudoun County deputies had been called to respond to a disorderly conduct complaint at the Sterling-area Costco. Police said the woman was threatening store employees.

Officials say the deputies ordered the woman to drop the weapons, but she advanced on them. Authorities say one deputy used a stun gun on the woman, but it was ineffective.

Police say the second deputy fired several shots, killing the woman. She was identified as 38-year-old Mhai Scott of Sterling.

Authorities say Scott worked for Club Demonstration Services, which provides services to Costco. The Washington Post reports Scott had been serving pizza.

One deputy was injured. He was treated and released at a local hospital.

Source: http://news.yahoo.com/deputy-shoots-kills-woman-va-costco-store-035120833.html

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Quotations of the day

"Let it be our task, every single one of us, to honor the strength and the resolve and the love these brave Americans felt for each other and for our country. Let us never forget to always remember and to be worthy of the sacrifice they make in our name." ? President Barack addressing a Memorial Day service at Arlington National Cemetery.

___

"What crime have those innocent people committed? Who is responsible for these massacres?" ? Witness Zein al-Abidin after a coordinated wave of car bombings tore through mostly Shiite areas of Baghdad, killing at least 66 people and maiming nearly 200 as insurgents step up the bloodshed roiling Iraq.

___

"It is extremely important not to do anything to rock the boat. Start delivering weapons now would rock the boat. No one is intending to do that," ? Swedish Foreign Minister Carl Bildt laying bare the European Union's hesitation on feeding arms in a foreign conflict after the EU said its member states within days will be able to send weapons to help Syria's outgunned rebels.

Source: http://news.yahoo.com/quotations-day-070627283.html

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বুধবার, ২৯ মে, ২০১৩

Children of long-lived parents less likely to get cancer

May 28, 2013 ? The offspring of parents who live to a ripe old age are more likely to live longer themselves, and less prone to cancer and other common diseases associated with ageing, a study has revealed.

Experts at the University of Exeter Medical School, supported by the National Institute for Health Research Collaboration for Leadership in Applied Health Research and Care in the South West Peninsula (NIHR PenCLAHRC), led an international collaboration which discovered that people who had a long-lived mother or father were 24% less likely to get cancer. The scientists compared the children of long-lived parents to children whose parents survived to average ages for their generation.

The scientists classified long-lived mothers as those who survived past 91 years old, and compared them to those who reached average age spans of 77 to 91. Long-lived fathers lived past 87 years old, compared with the average of 65 to 87 years. The scientists studied 938 new cases of cancer that developed during the 18 year follow-up period.

The team also involved experts from the National Institute for Health and Medical Research in France (Institut national de la sant? et de la recherche m?dicale), the University of Michigan and the University of Iowa. They found that overall mortality rates dropped by up to 19 per cent for each decade that at least one of the parents lived past the age of 65. For those whose mothers lived beyond 85, mortality rates were 40 per cent lower. The figure was a little lower (14 per cent) for fathers, possibly because of adverse lifestyle factors such as smoking, which may have been more common in the fathers.

In the study, published in the Journals of Gerontology: Series A, the scientists analysed data from a series of interviews conducted with 9,764 people taking part in the Health and Retirement Study. The participants were based in America, and were followed up over 18 years, from 1992 to 2010. They were interviewed every two years, with questions including the ages of their parents and when they died. In 2010 the participants were in their seventies.

Professor William Henley, from the University of Exeter Medical School, said: "Previous studies have shown that the children of centenarians tend to live longer with less heart disease, but this is the first robust evidence that the children of longer-lived parents are also less likely to get cancer. We also found that they are less prone to diabetes or suffering a stroke. These protective effects are passed on from parents who live beyond 65 -- far younger than shown in previous studies, which have looked at those over the age of 80. Obviously children of older parents are not immune to contracting cancer or any other diseases of ageing, but our evidence shows that rates are lower. We also found that this inherited resistance to age-related diseases gets stronger the older their parents lived."

Ambarish Dutta, who worked on the project at the University of Exeter Medical School and is now at the Asian Institute of Public Health at the Ravenshaw University in India, said: "Interestingly from a nature versus nurture perspective, we found no evidence that these health advantages are passed on from parents-in-law. Despite being likely to share the same environment and lifestyle in their married lives, spouses had no health benefit from their parents-in-law reaching a ripe old age. If the findings resulted from cultural or lifestyle factors, you might expect these effects to extend to husbands and wives in at least some cases, but there was no impact whatsoever."

In analysing the data, the team made adjustments for sex, race, smoking, wealth, education, body mass index, and childhood socioeconomic status. They also excluded results from those whose parents died prematurely (ie mothers who died younger than 61 or fathers younger than 46).

The study could not look at the various sub groups of cancer, as numbers did not allow accurate estimates. This study was carried out in preparation for a more detailed analysis of factors explaining why some people seem to age more slowly than others. Future work will use the UK Biobank, which analyses a cohort of 500,000 participants.

Other collaborators on the paper were Dr Jean-Marie Robine, of the Institut National de la Sant? et de la Recherche M?dical, Dr Kenneth Langa of the University of Michigan, Professor Robert Wallace of the University of Iowa and Professor David Melzer, of the University of Exeter Medical School.

Source: http://feeds.sciencedaily.com/~r/sciencedaily/~3/LtsST1H2wf8/130528122508.htm

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Novel disease in songbirds demonstrates evolution in the blink of an eye

May 28, 2013 ? A novel disease in songbirds has rapidly evolved to become more harmful to its host on at least two separate occasions in just two decades, according to a new study. The research provides a real-life model to help understand how diseases that threaten humans can be expected to change in virulence as they emerge.

"Everybody who?s had the flu has probably wondered at some point, 'Why do I feel so bad?'" said Dana Hawley of Virginia Tech, the lead author of the study to be published in PLOS Biology on May 28, 2013. "That?s what we?re studying: Why do pathogens cause harm to the very hosts they depend on? And why are some life-threatening, while others only give you the sniffles?"

Disease virulence is something of a paradox. In order to spread, viruses and bacteria have to reproduce in great numbers. But as their numbers increase inside a host?s body, the host gets more and more ill. So a highly virulent disease runs the risk of killing or debilitating its hosts before they get a chance to pass the bug along. It finds the right balance through evolution, and the new study shows it can happen in just a few years.

Hawley and her coauthors studied House Finch eye disease, a form of conjunctivitis, or pinkeye, caused by the bacteria Mycoplasma gallisepticum. It first appeared around Washington, D.C., in the 1990s. The House Finch is native to the Southwest but has spread to towns and backyards across North America. The bacteria is not harmful to humans, which makes it a good model for studying the evolution of dangerous diseases such as SARS, Ebola, and avian flu.

"There?s an expectation that a very virulent disease like this one will become milder over time, to improve its ability to spread. Otherwise, it just kills the host and that?s the end of it for the organism," said Andr? Dhondt, director of Bird Population Studies at the Cornell Lab of Ornithology and a coauthor of the study. "House Finch eye disease gave us an opportunity to test this?and we were surprised to see it actually become worse rather than milder."

The researchers used frozen bacterial samples taken from sick birds in California and the Eastern Seaboard at five dates between 1994 and 2010, as the pathogen was evolving and spreading. The samples came from an archive maintained by coauthor David Ley of North Carolina State University, who first isolated and identified the causative organism. The team experimentally infected wild-caught House Finches, allowing them to measure how sick the birds got with each sample. They kept the birds in cages as they fell ill and then recovered (none of the birds died from the disease).

Contrary to expectations, they found that in both regions the disease had evolved to become more virulent over time. Birds exposed to later disease strains developed more swollen eyes that took longer to heal. In another intriguing finding, it was a less-virulent strain that spread westward across the continent. Once established in California, the bacteria again began evolving higher virulence.

In evolutionary terms, some strains of the bacteria were better adapted to spreading across the continent, while others were more suited to becoming established in one spot. "For the disease to disperse westward, a sick bird has to fly a little farther, and survive for longer, to pass on the infection. That will select for strains that make the birds less sick," Hawley said. "But when it gets established in a new location, there are lots of other potential hosts, especially around bird feeders. It can evolve toward being a nastier illness because it?s getting transmitted more quickly."

House Finch eye disease was first observed in 1994 when bird watchers reported birds with weepy, inflamed eyes to Project FeederWatch, a citizen science study run by the Cornell Lab. Though the disease does not kill birds directly, it weakens them and makes them easy targets for predators. The disease quickly spread south along the Eastern Seaboard, north and west across the Great Plains, and down the West Coast. By 1998 the House Finch population in the eastern United States had dropped by half?a loss of an estimated 40 million birds.

Bird watchers can do their part to help House Finches and other backyard birds by washing their feeders in a 10 percent bleach solution twice a month.

Source: http://feeds.sciencedaily.com/~r/sciencedaily/top_news/~3/OEZdZecuDIA/130528180839.htm

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মঙ্গলবার, ২৮ মে, ২০১৩

Unique omega-3 supplement effective at reducing exercise-induced asthma symptoms

May 28, 2013 ? An Indiana University study has found that a unique omega-3 supplement derived from the New Zealand green-lipped mussel significantly improved lung function and reduced airway inflammation in asthmatics who experience exercise-induced bronchoconstriction, also called exercise-induced asthma.

Timothy Mickleborough, professor in the IU School of Public Health-Bloomington, said his findings are similar to his studies involving fish oil but required a much smaller dosage of the supplement. His new study, appearing online in the journal Respiratory Medicine, found a 59 percent improvement in lung function after an airway challenge, and a reduction in airway inflammation, asthma symptoms and use of emergency medication.

"Not only does it reduce symptoms, which will make you feel better, but it potentially could improve athletic performance," Mickleborough said. "Any time you can reduce medication is good."

In exercise-induced asthma, vigorous exercise triggers an acute narrowing of the airway afterward, making breathing difficult. Other symptoms include coughing, tightening of the chest and excessive fatigue. About 90 percent of people with asthma have this condition, which also is found in an estimated 10 percent or more of elite athletes and as much as 10 percent of the general population without asthma.

Mickleborough's study used Lyprinol/Omega XL, which contains PCSO-524, a patented extract of stabilized lipids from the New Zealand green-lipped mussel, combined with olive oil and vitamin E. PCSO-524 includes the five main lipid classes: sterol esters, sterols, polar lipids, triglycerides and free fatty acids, including eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA).

Previous studies involving PCSO-524 have found it to be effective in treating osteoarthritis, rheumatoid arthritis and inflammatory bowel disease. Mickleborough's study is the first to show that it is effective in reducing the airway inflammation experienced by asthmatic study participants diagnosed with exercise-induced asthma.

Mickleborough is chairing a symposium, "Health and Performance Benefits of Omega-3 Fatty Acids: Something Fishy Going On?" at 9 a.m. Saturday at the American College of Sports Medicine annual meeting in Indianapolis. Results from his PCSO-524 study will be discussed at the meeting during a poster session at 8-9:30 a.m. on Thursday.

About the study:

*The study involved 12 men and eight women ages 20 to 24 and was conducted in the Human Performance and Exercise Biochemistry Laboratory in the Department of Kinesiology at IU. All study participants had physician-diagnosed asthma and documented exercise-induced asthma. The study was conducted as a randomized, double-blind, placebo-controlled crossover trial. Study participants, none of whom took daily maintenance medication but all of whom used rescue inhalers, followed their regular diet for three weeks. Then, half took a placebo for three weeks while the rest took the supplement. They then followed their normal diet for two weeks. After that, they took the alternative supplement for three weeks. The placebo and PCSO-524 looked identical. A eucapnic voluntary hyperventilation challenge, which is a scientifically preferred substitute for an exercise challenge, was conducted at the beginning of the study and after each treatment period. Various measures of lung function and inflammation were collected before and after the eucapnic voluntary hyperventilation challenge, and study participants were asked to keep track of emergency inhaler use, symptoms and peak flow measurements.

Mickleborough plans to conduct further studies that look at the impact of PCSO-524 on delayed onset muscle soreness and delayed onset muscle damage. He also will examine whether the supplement can improve lung function and relieve airway inflammation in elite athletes who do not have asthma.

The research for "Marine lipid fraction PCSO-524? (lyprinol?/omega XL?) of the New Zealand green lipped mussel attenuates hyperpnea-induced bronchoconstriction in asthma," was supported by a grant from Pharmalink International LTD, which manufactures and owns PCSO-524. The funder had no role in study design, data collection and analysis, in writing the journal article, or the decision to publish.

Co-authors include Cherissa L. Vaughn, Ren-Jay Shei, Eliza M. Davis and Daniel P. Wilhite, all with the Department of Kinesiology in the IU School of Public Health-Bloomington.

Source: http://feeds.sciencedaily.com/~r/sciencedaily/top_news/top_health/~3/k2nUlvZfJW8/130528105241.htm

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Colonel Littleton No. 11 Survival Belt review

I am not sure if I should cue the theme to Mission Impossible, Raiders of the Lost Ark, or MacGyver… And we all know if you are considering theme music, it is the start of a fun review. That difficult decision aside, the review item I am discussing is the?No. 11 Survival Belt?from Colonel Littleton [...]

Source: http://the-gadgeteer.com/2013/05/27/colonel-littleton-no-11-survival-belt-review/

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Stem cell injections improve spinal injuries in rats

May 27, 2013 ? An international team led by researchers at the University of California, San Diego School of Medicine reports that a single injection of human neural stem cells produced neuronal regeneration and improvement of function and mobility in rats impaired by an acute spinal cord injury (SCI).

The findings are published in the May 28, 2013 online issue of Stem Cell Research & Therapy.

Martin Marsala, MD, professor in the Department of Anesthesiology, with colleagues at UC San Diego and in Slovakia, the Czech Republic and The Netherlands, said grafting neural stem cells derived from a human fetal spinal cord to the rats' spinal injury site produced an array of therapeutic benefits -- from less muscle spasticity to new connections between the injected stem cells and surviving host neurons.

"The primary benefits were improvement in the positioning and control of paws during walking tests and suppression of muscle spasticity," said Marsala, a specialist in spinal cord trauma and spinal injury-related disorders. Spasticity -- exaggerated muscle tone or uncontrolled spasms -- is a serious and common complication of traumatic injury to the spinal cord.

The human stem cells, said the scientists, appeared to vigorously take root at the injury site.

"In all cell-grafted animals, there was robust engraftment, and neuronal maturation of grafted human neurons was noted," Marsala said. "Importantly, cysts or cavities that can form in or around spinal injuries were not present in any cell-treated animal. The injury-caused cavity was completely filled by grafted cells."

The rats received the pure stem cell grafts three days after injury (no other supporting materials were used) and were given drugs to suppress an immune response to the foreign stem cells. Marsala said grafting at any time after the injury appears likely to work in terms of blocking the formation of spinal injury cavities, but that more work would be required to determine how timing affects functional neurological benefit.

The grafted stem cells, according to Marsala, appear to be doing two things: stimulating host neuron regeneration and partially replacing the function of lost neurons.

"Grafted spinal stem cells are rich source of different growth factors which can have a neuroprotective effect and can promote sprouting of nerve fibers of the host neurons. We have also demonstrated that grafted neurons can develop contacts with the host neurons and, to some extent, restore the connectivity between centers, above and below the injury, which are involved in motor and sensory processing."

The scientists used a line of human embryonic stem cells recently approved for Phase 1 human trials in patients with chronic traumatic spinal injuries. Marsala said the ultimate goal is to develop neural precursor cells (capable of becoming any of the three main cell types in the nervous system) from induced pluripotent stem cells derived from patients, which would likely eliminate the need for immunosuppression treatment.

Pending approval by UC San Diego's Institutional Review Board, the next step is a small phase 1 trial to test safety and efficacy with patients who have suffered a thoracic spinal cord injury (between vertebrae T2-T12) one to two years earlier, and who have no motor or sensory function at or below the spinal injury site.

"This is exciting, especially because, historically, there has been very little to offer patients with acute spinal cord injury," said study co-author Joseph Ciacci, MD, professor of surgery and program director of the Neurosurgery Residency at the UC San Diego School of Medicine. Ciacci, who is also chief of neurosurgery for the Veterans Affairs San Diego Healthcare System, will oversee the clinical trial at UC San Diego and the VA.

Ciacci said if the initial study confirms safety and efficacy, as well as the viability of the implanted cells, neural regeneration and decreased spasticity, the protocol can be expanded to other patients with other forms of severe spinal cord injury.

Source: http://feeds.sciencedaily.com/~r/sciencedaily/top_news/top_health/~3/MQqq4t5my3E/130527231843.htm

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Romanian village unfurls largest flag in the world

BUCHAREST, Romania (AP) ? A Romanian village on Monday unfurled what is the largest flag ever made, according to Guinness World Records.

It took about 200 people several hours Monday to roll out the flag, which measured about 349 meters (1,145 feet) by 227 meters (744.5 feet), about three times the size of a football field, according to Jack Brockbank, an adjudicator for Guinness World Records who measured the flag before pronouncing it the biggest flag in the world.

"It gives me great pleasure to recognize a new Guinness World Record title," he said after measuring the flag. "Congratulations Romania!" He said Romania's red, yellow and blue flag covers an area of about 79,290 square meters (853,478 square feet), downing Lebanon which had held the previous record.

The five-ton flag was displayed in Clinceni, 35 kilometers (22 miles) southeast of Bucharest. Workers struggled to keep it firmly planted on the ground because of windy conditions and had to use small sandbags.

Adrian Dragomir, manager of the Flags Factory which created the flag, says it took weeks to sew and 70 kilometers (44 miles) of thread was needed.

A military brass band played as Prime Minister Victor Ponta and other ministers arrived in the village to view the flag.

Source: http://news.yahoo.com/romanian-village-unfurls-largest-flag-world-134545575.html

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সোমবার, ২৭ মে, ২০১৩

Neighbors in Lebanese city fight Syrian proxy war

(AP) ? In a rundown district of Lebanon's second largest city, residents have adapted to waging war with their neighbors.

Whenever violence breaks out, they string large cloths across intersections to block snipers' view, sleep in hallways to take cover from mortar shells and abandon apartments close to the front line.

The sectarian fighting between the two neighborhoods stretches back four decades to Lebanon's civil war. But it has become more frequent and increasingly lethal since the start of the Syrian conflict in 2011. The two districts support opposite sides.

The latest round between Bab Tabbaneh and Jabal Mohsen over the past week has been the bloodiest yet, leaving at least 28 dead and more than 200 wounded.

Bab Tabbaneh is mostly Sunni, while Jabal Mohsen is home to most of Tripoli's Alawites, followers of an offshoot of Shiite Islam.

An 18-year-old with a patchy black beard and a Kalashnikov assault rifle had nothing good to say about Jabal Mohsen. "They don't fear God, they are bad people," he said of his neighbors.

The teen said he is one of 10 brothers who have taken up arms, including one who tried to join the Syrian rebels but was captured and killed by Assad's troops.

Lebanon, a fragile patchwork of more than a dozen religious and ethnic groups, has withstood many sectarian flare-ups since its 15-year civil war ended in 1990.

But there are signs the spillover from the Syria conflict is getting more serious. In addition to the Tripoli fighting, gunmen from rival religious sects are increasingly engaged on opposite sides in Syria.

Over the weekend, Lebanon's Shiite Muslim Hezbollah, which has been fighting alongside Syrian President Bashar Assad's forces, said it would do battle until victory over Syria's rebels, most of them Sunni Muslims. On Sunday, two rockets struck Hezbollah strongholds in Beirut, apparent retaliation for Hezbollah's support of Assad.

In Syria, Shiite-dominated Iran and Hezbollah have lined up behind Assad, an Alawite, while Sunni states like Saudi Arabia support the rebels.

In Bab Tabbaneh, many say they are caught in the same kind of proxy war between the region's Sunni and Shiite powers.

"Their problems are being played out here," Bab Tabbaneh resident Mohammed Bukhari, 53, said.

Bukhari's second-floor apartment faces Jabal Mohsen, just a few dozen meters (yards) away. On May 19, when fighting broke out again, Bukhari moved with his wife, five children and two grandchildren into an empty apartment facing away from Jabal Mohsen.

"My own apartment is very dangerous," he said, pointing to bullet holes in a wooden cabinet and an interior door.

Many leave for safer areas during the fighting.

Those who remain behind try to cope. They've strung large sheets of tarpaulin across streets that are otherwise exposed to snipers from Jabal Mohsen, blocking their aim.

One family, near the Bukharis, climbs out a second-floor back window and down a ladder to reach the street because the front entrance faces the front line.

Tempers flare quickly. On a recent morning, a young bread vendor who tried to set up his tray of goods near the local Harba mosque was quickly spotted as an outsider. A crowd of men, shouting and pushing him, accused him of being a Syrian spy and marched him to the mosque, where he was locked in a room.

Jabal Mohsen sits on a slope above Bab Tabbaneh. The Lebanese army has set up checkpoints around the Alawite neighborhood. Heading there is risky because of snipers.

Bab Tabbaneh is more safely accessible from the center of Tripoli. The Lebanese army moved two armored vehicles to the edge of Bab Tabbaneh over the weekend, but the deployment seemed largely symbolic.

During a visit Friday, local gunmen controlled the streets.

Some sat in groups on plastic chairs along the sidewalk of Syria Street, a main thoroughfare just a block from Jabal Mohsen. They were on a break, smoking and talking. Most of the fighting takes place after dark, when combatants fire machine guns, mortar shells and rocket-propelled grenades at each other.

Their current battle coincides with an offensive by Syrian troops and Hezbollah on Qusair, a predominantly Sunni town in western Syria.

The fighters offered a range of reasons for shooting at their neighbors, from defending their district to taking revenge for previous bloodshed or letting off steam against Assad and Hezbollah. But beyond inflicting as much pain as possible on the other side, there seemed to be no clear objective to the fighting.

Khaled Shahsheer, a 42-year-old taxi driver wearing camouflage, said unemployment and poverty in Bab Tabbaneh are feeding sectarian tensions.

Two others, who spoke on condition of anonymity for fear of retribution, said they are also settling old scores.

"We have a long blood account open with them," said a 28-year-old money changer with an M-16 sniper rifle. "It's not just about Qusair."

The neighborhood forces clashed repeatedly during Lebanon's civil war. They fought again in 2008, after Hezbollah overran several Sunni neighborhoods in Beirut for a week and Tripoli's Sunnis retaliated. Since the start of the Syria conflict, there have been more than a dozen rounds of fighting.

The money changer's sniper position ? a sandbag-reinforced hole poked into the wall of the neighborhood's dilapidated "Andalus" cinema ? goes back to the 2008 fighting. He said his grandfather was killed in clashes with Jabal Mohsen in 1979.

Tripoli's Alawites feel they face an existential threat. "The Alawites are being subjected to an organized campaign that aims to eliminate them on all levels," Ali Feddah, a community leader, said earlier this month.

Alawites make up just 2 percent of the population in Lebanon and are surrounded by a large Sunni majority in Tripoli, a city of half a million people about 80 kilometers (50 miles) north of Beirut.

In Bab Tabbaneh, some said they can empathize with those on the other side.

"They also have children," 45-year-old Bab Tabbaneh housewife Sahar Ashrafiyeh said of the Alawites. Bullets have hit her balcony and bedroom wall, and her exposed kitchen has made it hard for her to cook for her family of nine.

The Ashrafiyehs fled the neighborhood in 1985, after her husband Mahmoud was shot in the leg, she said. The family settled in Germany but returned in 1992, a decision her husband now bitterly regrets, she said.

Lebanese leaders have expressed concern about the risk of escalation. Referring to the clashes in Tripoli, President Michel Suleiman warned last week that "with our own hands we are turning Lebanon into an arena (of conflict)."

The Lebanese army has not been able to act decisively, in part because of Lebanon's complex political constellations and because it does not have a monopoly on power ? Hezbollah's militia is a powerful rival.

In Tripoli, the government is particularly weak and the army, perceived here as Shiite-dominated, has to ensure local political support before moving in.

Some in Bab Tabbaneh take the fighting in stride. A Syrian refugee family living in two small rooms next to the Andalus cinema said Tripoli is still preferable to Homs, the battered Syrian city they fled 18 months ago.

In Homs, no one was safe from raids by pro-regime forces, said the father, who spoke on condition of anonymity because he did not want to endanger relatives back home.

"It's better here," he said. "They attack each other, but everyone stays in their place."

Associated Press

Source: http://hosted2.ap.org/APDEFAULT/cae69a7523db45408eeb2b3a98c0c9c5/Article_2013-05-27-Lebanon-Neighbors%20At%20War/id-867649ea0a064ef1926dc96f81c766c4

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Sony Action Cam


The Sony Action Cam, at $199.99 or $269.99 (list) for built-in Wi-Fi, is one of the more affordable action cameras available that still offers features like 1080p60 recording. Unfortunately, its video performance is just not up to snuff when compared with superlative offerings like the Editors' Choice GoPro Hero3 Black Edition. The Sony Action Cam?will capture your extreme moments on the cheap, but serious videographers should look elsewhere.

Design and Features
Compared with the boxy GoPro Hero3, the Action Cam looks far more streamlined with its barrel design. The camera measures about 1.9 by 1 by 3.3 inches (HWD) and weighs 2 ounces, making it a hair lighter than the 2.6-ounce Hero3. On the right side are a monochrome LCD and Prev/Next buttons. Around back are a large Record button and a hold switch. The back also slides open to reveal the battery compartment and microSD card slot that accepts cards up to 64GB. A compartment on the bottom houses micro USB and micro HDMI ports and a 3.5mm microphone jack. ?

Like with the GoPro, you cycle through all the settings using the LCD, but the Action Cam uses all three buttons for navigation. Prev and Next scroll through options, and pressing the Record button makes selections. Unfortunately, you can't change any of the settings once the Action Cam is in its waterproof housing, which is a big inconvenience for on-the-fly adjustments. There's a small red indicator light on the back, and like the GoPro, the Action Cam makes a loud beep to confirm shooting.

The accessory selection for the Action Cam isn't quite as diverse as GoPro's. The Action Cam comes with a waterproof housing (submergible to 197 feet) and one adhesive mount for attaching the camera to a helmet. Beyond that, you can get optional handle bar, headband, and suction cup mounts. Once mounted, you can't adjust the angle or tilt of the camera?for that you'll need the optional tilt adapter, which is a bit of bummer. The GoPro Hero3 offers far more mounting options out of the box, including the ability to tilt, while the Drift Innovation HD Ghost?has a unique twistable lens that allows for adjusting to get the level right even while it's mounted.

The Wi-Fi version allows you to connect the Action Cam to iOS and Android devices using a free app. From there you can change shooting settings, trigger shots, use your device as a viewfinder, and upload videos to the Web. Battery life was pretty solid with the Sony Action Cam, while the GoPro Hero3's Wi-Fi functionality was a huge battery drain.

Video Quality and Conclusions
The Sony Action Cam can shoot video at 1080p60, 1080p30, 720p30, and 720p120 resolutions and frame rates. It's a respectable variety, but still falls short of the Hero3's 4K shooting mode, even though that's limited to 15 frames per second. ?

For testing, we sent the Hero3, Sony Action Cam, and Drift HD Ghost out with our photographer on his most recent ski trip. Video quality at 1080p60 on the Action Cam was a bit of a letdown, lacking the same clarity and high-level of detail you find on the Hero3. Details, like bare tree branches, appear smeared and the footage has an overall graininess to it. Exposures look accurate in good lighting, but the Action Cam struggled in low-light and could not keep up with the Hero3 or the Drift HD Ghost.

Still image quality is pretty average here, and as with all action cameras, you're dealing with a good amount of lens distortion. Images top out at 2-megapixels, while the Hero3 can shoot at 12-, 7-, or 5-megapixels. It captures a fair amount of detail, and would be suitable for quick uploads online, but finer details look smudged and images appear flat.

At $200 for the base model and $270 for the Wi-Fi equipped model, the Sony Action Cam is a relative bargain. Unfortunately, you get what you pay for, as the Action Cam was handily beaten by the GoPro Hero3 Black Edition in every regard except battery life. Video performance is pretty disappointing, and compared with the Hero3, the Action Cam misses the mark when it comes to crisp details. On top of that, Sony cannot match GoPro's diversity of mounting options, and the fact that you can't adjust settings on the fly without pairing to a Wi-Fi enabled smartphone or tablet is a pretty big drawback.?

Source: http://feedproxy.google.com/~r/ziffdavis/pcmag/~3/SyEPcGo5Qh8/0,2817,2419057,00.asp

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রবিবার, ২৬ মে, ২০১৩

Alex Trebek is Insane, Conan O'Brien Claims

Source: http://www.thehollywoodgossip.com/2013/05/alex-trebek-is-insane-conan-obrien-claims/

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Driving and hands-free talking lead to spike in errors

May 24, 2013 ? Talking on a hands-free device while behind the wheel can lead to a sharp increase in errors that could imperil other drivers on the road, according to new research from the University of Alberta.

A pilot study by Yagesh Bhambhani, a professor in the Faculty of Rehabilitation Medicine, and his graduate student Mayank Rehani, showed that drivers who talk using a hands-free cellular device made significantly more driving errors -- such as crossing the centre line, speeding and changing lanes without signalling -- compared with just driving alone. The jump in errors also corresponded with a spike in heart rate and brain activity.

"It is commonplace knowledge, but for some reason it is not getting into the public conscience that the safest thing to do while driving is to focus on the road," said Rehani, who completed the research for his master's thesis in rehabilitation science at the U of A.

The researchers became interested in the topic in 2009 shortly after Alberta introduced legislation that banned the use of handheld cellphones while driving but not hands-free devices. In this study, they used near infrared spectroscopy to study the brain activity of 26 participants who completed a driving course using the Virage VS500M driving simulator at the Glenrose Rehabilitation Hospital.

Near infrared spectroscopy is a non-invasive optical technique that allows researchers to examine real-time changes in brain activity in the left prefrontal lobe. Participants were first tested in a control condition, using the simulator to drive in city street conditions using no telecommunications device. They were tested again while talking on a hands-free device during two-minute conversations that avoided emotionally charged topics.

The research team found there was a significant increase in brain activity while talking on a hands-free device compared with the control condition. A majority of participants showed a significant increase in oxyhemoglobin in the brain, with a simultaneous drop in deoxyhemoglobin -- a sign of enhanced neuronal activation during hands-free telecommunication.

"The findings also indicated that blood flow to the brain is significantly increased during hands-free telecommunication in order to meet the oxygen demands of the neurons under the 'distracted' condition," said Bhambhani.

He added the results did not reveal a significant relationship between enhanced neuronal activation and the increase in the number of driving errors, most likely because the near infrared spectroscopy measurements were recorded from a single site, the prefrontal lobe.

The findings are considered novel on a topic that is receiving considerable attention by policy-makers globally. Rehani's contribution to the project earned him the 2013 Alberta Rehabilitation Award for Innovation in Rehabilitation (Student).

The researchers note this is a preliminary study and hope that it can be part of a larger body of literature that can help inform policy-makers about the safety implications of using hands-free devices while driving.

For Rehani, the work was part of rewarding academic journey at the U of A, which gave him opportunities to do research in a number of areas in neuroscience. He said he received outstanding support from both the faculty and colleagues at the Glenrose -- including Quentin Ranson, the occupational therapist and rehabilitation technology lead who helped facilitate the simulator research.

"To have a Faculty of Rehabilitation Medicine, which is the only free-standing faculty of its kind in Western Canada, and to have a hospital like the Glenrose dedicated to rehabilitation, is amazing," he said. "Both workplaces have such a collegial environment, with quality faculty and staff who are both working toward patient betterment. These institutions connect so well, it's fantastic."

Source: http://feeds.sciencedaily.com/~r/sciencedaily/top_news/top_health/~3/cNb1w2075lg/130524160745.htm

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Possible Collision Between Cube-satellite and Old Space Junk

If by equilibrium you mean a higher state of entropy, then yes.

You are, however, sadly mistaken in your assumption that having passed a critical mass of orbiting objects means they will suddenly start rapidly falling out of the sky.

On the contrary, what will happen now is the present objects will become more and more likely to have collisions as more and more collisions occur, in a cascade effect.

Eventually there will be a more or less impenetrable field of small debris flying around, and no opportunity to

Source: http://rss.slashdot.org/~r/Slashdot/slashdotScience/~3/uoj5rb9P4VY/story01.htm

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শনিবার, ২৫ মে, ২০১৩

Brood II Cicadas Now Bugging New Yorkers

The 17-year-old sex-crazed cicadas of Brood II have started to stir in Staten Island.

Historically, large numbers of these periodical cicadas have spent their short but dramatic adulthoods in the borough, but they might be harder to spot elsewhere in New York City.

The noisy creatures started emerging by the hundreds last week in certain parts of Staten Island, said Edward Johnson, director of science at the Staten Island Museum. But the insects are not likely to come out in droves in Brooklyn, Queens, the Bronx and Manhattan, Johnson added.

"They don't fly very far as adults, and so are unlikely to colonize other boroughs from Staten Island," he said. [Ewww! 6 Crazy Facts About Cicadas]

Brood II is one of the distinct cicada populations that only matures every 13 or 17 years. Known as periodical cicadas, they belong to the genus Magicicada, and they can be found only in the eastern half of North America. Brood II's range extends from Georgia to Connecticut and it began its emergence earlier this month.

Their loud mating calls and carpet of corpses may come as a nuisance to some, but each emergence is exciting for entomologists studying the mysterious, long-lived insects ? they spend most of their lives in an immature stage. The cicadas coming out of the ground now were born in 1996, meaning they're the first Brood II generation to be greeted by Twitter and Flickr, which make it possible for people to socially share their pictures of the insects. Radiolab's Cicada Tracker and Magicicada as well allow citizen scientists to report their sightings in real time.

Mapping where these 17-year cicadas emerge could offer new insights on land use, climate change and the bugs themselves. The cicadas' long subterranean youth, which may be the longest of any known insect, means it's difficult for scientists to study their life cycle.

Geographically, the 17-year brood populations fit together like puzzle pieces. Brood II is almost like the keystone, since its range borders that of many other broods, University of Connecticut cicada expert John Cooley said earlier this month. Scientists think they might be able to learn about why different broods evolved by studying their boundaries.

For Johnson, the emergence will give him a chance to show off the Staten Island Museum's collection of cicadas, the second largest in the world. He said he has dim memories of the Brood II emergences on Staten Island in 1962 and 1979, but better recollections from last time, in 1996.

From that year, Johnson recalls "lots of cicada song and activity in the woodlands, lots of media attention, and my youngest son was born three months before the emergence, so he is a 'cicada baby,' and gets to measure his life in cicada years."

To be fair to the creatures, they're not swarming or invading or coming out of hibernation. They've been sharing the environment with East Coasters this whole time ? they've just been underground sucking roots. The insects might only seem like a plague because of their numbers. Some scientists estimated up to 30 billion Brood II adults would make their debut this year. [Ouch: Nature's 10 Biggest Pests]

Researchers think this is all part of a survival strategy known as "predator satiation," in which a huge percentage of the population is expected to be eaten, Popular Science reported. Cicadas are clumsy and they don't have defenses for stinging or biting their predators, but their numbers alone will be enough to ensure the brood survives. In other words, there will still be lots of six-legged lingerers after dogs, cats, birds and even some adventurous humans get their fill.

But even if they do dodge their enemies, the clock is ticking for emergent cicadas.

After a dark 17-year juvenile period underground, hormones and warm soil temperatures (64 degrees Fahrenheit to be precise) send the crunchy cicada nymphs above the surface. The insects then shed their brown exoskeletons and spend their few weeks of adulthood mating and laying eggs in tree branches. Then, they die, leaving their big bodies to litter the ground, while the newly hatched babies will make their way down to the dirt to continue the cycle. The Brood II generation born this year will go on hiatus until 2030.

Cicadas' short act above the surface is made more theatrical by their racket. Males make species-specific mating calls by vibrating a white, drumlike plate, or tymbal, on either side of their abdomens. These chirping and clicking noises can be heard by females up to a mile (1.6 kilometers) away. Standing near an especially loud chorus of cicadas can be like standing near a motorcycle, with a noise reaching up to 100 decibels.

Follow Megan Gannon on Twitter and Google+. Follow us @livescience, Facebook & Google+. Original article on LiveScience.com.

Copyright 2013 LiveScience, a TechMediaNetwork company. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.

Source: http://news.yahoo.com/brood-ii-cicadas-now-bugging-yorkers-162919497.html

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Kremlin 'outraged' by electoral fraud... in Eurovision song contest

Allegations of voter fraud in Russia are nothing new. But this time it's the Kremlin making them.

By Fred Weir,?Correspondent / May 22, 2013

Winner of the 2013 Eurovision Song Contest Emmelie de Forest of Denmark who won with her song 'Only Teardrops,' holds the winners trophy as she poses for photographers following the final of the Eurovision Song Contest at the Malmo Arena in Malmo, Sweden, last Saturday. The Kremlin today said that they found a case of alleged voting fraud in Eurovision song contest.

Alastair Grant/AP

Enlarge

Russian authorities have finally found a case of alleged voting fraud that they can get really incensed about.

Skip to next paragraph Fred Weir

Correspondent

Fred Weir has been the Monitor's Moscow correspondent, covering Russia and the former Soviet Union, since 1998.?

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No, it's not the 2011 Duma elections, which experts from across Russia's political spectrum?now agree were probably falsified?on a huge scale. That has never been the subject of official outrage, or even investigation.

This is something far more important: the continental song competition, Eurovision.

Russian Foreign Minister Sergei Lavrov told journalists?yesterday?that he was "outraged" to learn that the voting system in neighboring Azerbaijan had eliminated the votes cast for Russian Eurovision contestant Dina Garipova in that country. Voters registering their preferences by cellphone had given a second-place finish to Ms. Garipova ? which should have given her 10 points in the overall contest ? but they had somehow disappeared in the reporting process.

"We can?t be happy with the fact that 10 points were stolen from our participant, primarily in terms of how this event is organized," Mr. Lavrov?said during a previously scheduled joint press conference?in Baku with Azeri Foreign Minister Elmar Mammadyarov.?

"We have agreed with Elmar Mammadyarov that we will discuss joint measures to ensure that this outrageous action will not go unanswered," Lavrov added.

The head of Azerbaijan's broadcasting company, Jamil Guliyev, quickly acknowledged that some sort of mistake had occurred.

"We sincerely hope that this case, which was probably initiated by some groups, would not cast a shadow on brotherly relations of Azeri and Russian people," he told journalists.

Contestant: Why the fuss?

The mammothly popular annual singing contest, held last Saturday in Malmo, Sweden, featured contestants from 39 countries from the Atlantic to the shores of the Caspian Sea. An estimated 125 million TV viewers,?each cheering for their country's contestants as avidly as any football team,?tuned in to the Eurovision finals, plus countless more around the world via Internet streaming.

Competition for the honor of hosting Eurovision is almost as serious as for the Olympics, and?Russia went wild when Moscow won the right to stage the event back in 2009.

The winner of each year's multinational contest is determined by a complicated system ??which is supposed to be foolproof ? in which each country votes for all entries except their own.

Votes cast by TV viewers in each country by cellphone (or through social media such as?Facebook) makes up half the decision, while a national panel of judges makes the other half. At the end of the process, each country submits a ranking for all contestants ? except its own ? by giving 12 points to the winner, 10 points to the runner-up, and so on. The results, totaled for all of Europe, determine the overall winner.

This year Denmark's Emmelie de Forest won by a landslide, with 281 points, followed by Azerbaijan's Farid Mammadov with 234 points (full table?here). Russia's Garipova came fifth with 174 points.

The missing 10 points from Azerbaijan didn't affect Garipova's standing, and she graciously told the Russian media today that?it would be better to drop the rising demand for an international investigation into the alleged vote-rigging scandal.

"To be honest, I don?t know why an investigation is needed," Garipova said. "I am satisfied with the result of the contest."

Inferiority complex

Eurovision's organizers?said in a statement?that they will take swift action to preserve the event's apolitical nature and prevent any future abuses.?But the scandal is far from dying down in Russia.?

Some Russian conservatives claim it's just another example of Western "double standards," in which those who never miss an opportunity to lecture Russia about human rights and democracy turn out to be dirty themselves.

Former Kremlin adviser Sergei Markov told the Ekho Moskvi radio station?today?that the Eurovision result was "direct forgery and fraud."

Perhaps tongue-in-cheek, Mr. Markov went on: "In general it's better when we non-Europeans are accusing them of falsifying elections than when they are accusing us?. And here [with Eurovision] we have such a fraud, and the whole world has seen it with their own eyes."

Viktor Shenderovich, once a top political satirist?who was exiled from the mainstream media?after Vladimir Putin came to power, says the Russian response, and particularly Lavrov's official outrage over a singing contest, is an unseemly display that reveals a persecution complex at the heart of Kremlin behavior.

"This comes from the inferiority complex than haunts our state, which is really funny when you recall that we're a country the size of a continent that has a vast nuclear arsenal," Mr. Shenderovich says.

"When a mature adult from the Foreign Ministry starts taking such things seriously, well, it can only mean that we have lost any sense of self-irony. On the surface it looks silly, but when you examine the roots of this affair you can't help feeling sad?. Whenever Russia feels it's been shortchanged in anything, be it a song contest or a sporting event, our people immediately begin claiming that there's a plot against us. But, as the old Russian saying goes, 'a bad dancer's boots are always too tight,'" he adds.?

Source: http://rss.csmonitor.com/~r/csmonitor/globalnews/~3/go3P9d9TwRk/Kremlin-outraged-by-electoral-fraud-in-Eurovision-song-contest

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