মঙ্গলবার, ১৯ মার্চ, ২০১৩

Rooster's crows driven by internal clock, say scientists

Roosters kept in constant light will still crow at daylight, finds research that points to an internal circadian clock in the birds.

By Tia Ghose,?LiveScience Staff Writer / March 18, 2013

Roosters crow in the mornings because their internal clock tells them to, new research suggests.

Current Biology, Shimmura et al.

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The rooster's morning cock-a-doodle-doo is driven by an internal clock, finds new research, suggesting the male chickens really know the time of day.

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The study, detailed today (March 18) in the journal Current Biology, found that roosters put under constant light conditions will still crow at the crack of dawn.

Past studies have found that a myriad of animal behaviors are driven by an internal clock: at night, a dip in insulin causes?humans to process food more slowly, and even?blind cave fish?use a circadian clock to tell time.

"'Cock-a-doodle-doo' symbolizes the break of dawn in many countries," said study author Takashi Yoshimura of Nagoya University, in a statement. "But it wasn't clear whether crowing is under the control of a biological clock or is simply a response to external stimuli."

Because stimuli throughout the day ? such as car headlights ? will set off a rooster's crow at any time, it was also possible that increasing light was the trigger for the cock's crows.

To find out Yoshimura and his colleagues put 40 roosters in a setting with constant light, then recorded when they crowed.

Sure enough,?the chickens?crowed at daybreak regardless of the light conditions. The roosters also crowed at other times of day and in response light and the crows of their fellow chickens, but those behaviors were much stronger at daybreak. The findings suggest that an internal circadian clock, rather than external conditions, drive the behavior.

As a follow-up, the team hopes to determine the genetic underpinnings of other animal sounds.

"We still do not know why a dog says 'bow-wow' and a cat says 'meow,'" Yoshimura said in a statement. "We are interested in the mechanism of this genetically controlled behavior and believe that chickens provide an excellent model."

Follow Tia Ghose on Twitter?@tiaghose.?Follow?LiveScience @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://rss.csmonitor.com/~r/feeds/science/~3/7CnJhxEH9CY/Rooster-s-crows-driven-by-internal-clock-say-scientists

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শুক্রবার, ১৫ মার্চ, ২০১৩

UK study: Violence more likely among vets, troops

FILE - In this Monday, Feb. 15, 2010 file photo, a British soldier walks with his machine gun on the roof of a residential house in the village Qari Sahib, Nad Ali district, Helmend province, southern Afghanistan. Young men who have served in the British military are about three times more likely than civilians to have committed a violent offense, researchers reported Friday, March 15, 2013 in a study that explores the roots of such behavior. The research found that merely being sent to Iraq or Afghanistan made no difference in rates of violent crime later on. Instead, a key predictor was violent behavior before enlisting. (AP Photo/Altaf Qadri, File)

FILE - In this Monday, Feb. 15, 2010 file photo, a British soldier walks with his machine gun on the roof of a residential house in the village Qari Sahib, Nad Ali district, Helmend province, southern Afghanistan. Young men who have served in the British military are about three times more likely than civilians to have committed a violent offense, researchers reported Friday, March 15, 2013 in a study that explores the roots of such behavior. The research found that merely being sent to Iraq or Afghanistan made no difference in rates of violent crime later on. Instead, a key predictor was violent behavior before enlisting. (AP Photo/Altaf Qadri, File)

LONDON (AP) ? Young men who have served in the British military are about three times more likely than civilians to have committed a violent offense, researchers reported Friday in a study that explores the roots of such behavior.

The research found that merely being sent to Iraq or Afghanistan made no difference in rates of violent crime later on. Instead, a key predictor was violent behavior before enlisting. Combat duty also raised the risk, as did witnessing traumatic events during deployment or misusing alcohol afterward.

Still, the vast majority ? 94 percent ? of British military staff who return home after serving in a combat zone don't commit any crimes, researchers told reporters at a briefing.

The study found little difference in the lifetime rates of violent offenses between military personnel and civilian populations at age 46 ? 11 percent versus almost 9 percent. Among younger men, however, being in the military seemed to make a difference: Nearly 21 percent of the military group under age 30 had a conviction for a violent offense in their lifetime compared to fewer than 7 percent of similarly aged men in the general population, according to British crime statistics.

"The problem is that some of the qualities you want in a soldier are the same ones that get people arrested for violent behavior," said Walter Busuttil, director of medical services for Combat Stress, a British veterans' charity that was not part of the study. Busuttil said many of those recruited into the army are from disadvantaged backgrounds where violence is more common.

The research was published online Friday in the medical journal Lancet. Researchers at the Institute of Psychiatry at King's College London looked at data from more than 13,800 U.K. military personnel and veterans and compared that to records of violent crimes ranging from verbal threats to assaults and homicides. Some people were followed for up to seven years. Nearly 1,500 women were included, though they were mostly in noncombat roles.

Deirdre MacManus, the study's lead author, said combat experience seemed to matter when they compared violent crime rates among military personnel. "Being deployed in itself wasn't a risk factor for violent offenses but being exposed to multiple traumas, like seeing someone get shot, increased the risk by 70 to 80 percent," she said, compared to someone who hadn't witnessed such a harrowing ordeal.

Researchers said other studies have made similar findings.

Britain currently has some 5,000 soldiers in the NATO-led mission fighting in Afghanistan and it is the second-largest foreign contingent after the U.S. It withdrew its soldiers from Iraq in 2009 after six years. The U.K. Ministry of Defense has been under pressure to develop more mental health programs for veterans after reports of returning servicemen committing crimes, like the 2012 case of an ex-soldier in Leeds jailed for shooting his landlady after fighting in Afghanistan. He had been diagnosed with post-traumatic stress disorder but had not been monitored or treated.

In the U.S., there have been numerous cases of veterans committing violent crimes, including a Marine charged with killing six people in California last year. Soldiers from a single Army unit in Colorado killed 11 people over a few years after their return home. An Army report in 2009 placed part of the blame on the psychological trauma of fierce combat in Iraq. And this week, a U.S. Senate panel heard women in the military describe sexual assaults by fellow soldiers.

American researchers said it is possible the same links the British study found between fighting in a war and violent crime exist in the U.S. but that there isn't enough data yet.

"For some soldiers, it's hard to stop being a warrior," said Brett Litz, a psychology professor at Boston University who studies veterans' issues. "What happens during a war may be a prescription for a small percentage of men to get into trouble," he said. "They may find it very difficult to switch out of a wartime mindset."

But given the differences between Britain and the U.S., Litz said it was impossible to predict what effects would be seen in the United States. "Maybe the economy is better here, maybe the (department of defense) does a better job with transition, maybe (the) culture is different especially with respect to alcohol," Litz said.

"There will be a lot of returning soldiers who have to be reintegrated and unfortunately there is no quick fix," he said.

____

Online:

http://www.thelancet.com/journals/lancet/article/PIIS0140-6736(12)60354-2/abstract

Associated Press

Source: http://hosted2.ap.org/APDEFAULT/bbd825583c8542898e6fa7d440b9febc/Article_2013-03-15-Veterans-Violence/id-4a596cf0c728437e902c615d7a83d049

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বৃহস্পতিবার, ১৪ মার্চ, ২০১৩

Samsung Galaxy S IV gets detailed in extensive early preview, screen examined up close

Galaxy S IV gets detailed in extensive early preview, screen examined up close

We haven't exactly been lacking for leaks of Samsung's new Galaxy S IV ahead of its launch later today, but those looking for yet more can now get their fix courtesy of an extensive preview/review of the still-unofficial phone published by IT168. That's the same site that's been the source of a number of those aforementioned leaks in recent days. While it's still not clear if the phone in their possession is identical to Samsung's final retail device, it certainly appears to be a well-polished version, and decidedly familiar for anyone accustomed to the Galaxy S III. The preview goes particularly in-depth on the phone's screen, even going so far as to put it under a microscope to compare it to the Galaxy S III and Note II. Hit the source link below for a closer look yourself.

[Thanks, Humberto]

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Source: IT168

Source: http://www.engadget.com/2013/03/14/galaxy-s-iv-gets-detailed-in-extensive-early-preview-screen-exa/

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রবিবার, ১০ মার্চ, ২০১৩

AT&T reaffirms commitment to unlocking cell phones

CAPE CANAVERAL, Fla., March 9 - An asteroid as big as a city block shot relatively close by the Earth on Saturday, the latest in a series of visiting celestial objects including an asteroid the size of a bus that exploded over Russia last month, injuring 1,500. Discovered just six days ago, the 460-foot long (140-meter) Asteroid 2013 ET passed about 600,000 miles from Earth at 3:30 p.m. EST. That's about 2-1/2 times as far as the moon, fairly close on a cosmic yardstick. ...

Source: http://news.yahoo.com/t-reaffirms-commitment-unlocking-cell-phones-014703142.html

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শনিবার, ৯ মার্চ, ২০১৩

Gardner Denver agrees to $3.73B sale

(AP) ? Industrial pump maker Gardner Denver said Friday that it has agreed to sell itself to Kohlberg Kravis Roberts & Co. for about $3.73 billion.

Under the terms of the agreement, the New York-based private equity firm will acquire the Wayne, Pa.-based company for $76 per share.

That represents a 3 percent premium over the company's Thursday closing stock price and a 39 percent premium over its closing stock price on Oct. 24, the day before it announced it was exploring a possible sale.

The companies valued the deal at $3.9 billion including the assumption of debt.

Gardner Denver said in October that it would be reviewing its "strategic options," which generally include a sale of all or part of a company. That came after the company's August announcement that it would restructure its business to improve its profitability by consolidating manufacturing facilities and cutting staff.

In recent weeks, Gardner Denver shares have jumped on media reports that KKR had made a bid for the company.

The deal has been approved by Gardner Denver's board, but remains subject to shareholder and regulatory approvals. It's expected to close in the third quarter.

Shares of Gardner Denver Inc. rose 86 cents to $74.71 in morning trading Friday.

Associated Press

Source: http://hosted2.ap.org/APDEFAULT/f70471f764144b2fab526d39972d37b3/Article_2013-03-08-US-Kohlberg-Gardner-Denver/id-d17fa0d900f949e8bb4d479ace75969c

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শুক্রবার, ৮ মার্চ, ২০১৩

Time Warner spinning off Time Inc. magazines

(AP) ? Time Warner Inc. said Wednesday that it will spin off the magazine unit behind Time, Sports Illustrated and People into a separate, publicly traded company by the end of the year.

CEO Jeff Bewkes said in a statement Wednesday that the decision to split off the Time Inc. magazine company will give Time Warner "strategic clarity" and enable it to focus on its TV networks including TNT, HBO and CNN, and its Warner Bros. studio, which produces movies and TV shows.

He said the move would create value for shareholders, similar to the company's previous spin-offs of Time Warner Cable and AOL.

In recent weeks, Time Warner had been in talks to combine all of Meredith's magazines with Time Inc.'s lifestyle titles such as People, InStyle and Real Simple. But talks broke down over a value for the combined company and over which magazines from Time Inc. would be included in the mix, according to a person familiar with the matter. The person was not authorized to speak publicly and spoke on condition of anonymity.

Meredith said Wednesday that it respected Time Warner's decision and hoped to work with it on future opportunities. Meredith publishes magazines aimed at women such as Better Homes and Gardens, Fitness and Family Circle.

Time Warner shares rose 79 cents, or 1.4 percent, to $56.25 in after-hours trading following the announcement, after closing up 41 cents at $55.46. Shares of Des Moines, Iowa-based Meredith fell 80 cents, or 2 percent, to $39.50 in after-hours trading after closing down 86 cents at $40.30.

Analysts have estimated that the Time Inc. division is worth around $2.5 billion.

Time Warner said the spin-off would be tax-free to its shareholders.

The move completes the years-long unwinding of a media and telecoms giant formed in 2001 when America Online, an Internet access company, used $147 billion worth of inflated stock to buy Time Warner, in what has been regarded as the worst corporate merger of all time.

Expected company synergies never materialized. Over the years, Time Warner moved to spin off the cable TV hookup business as well as AOL in order to focus on its profitable and growing TV and movie businesses.

Matthew Harrigan, an analyst with Wunderlich Securities, said shareholders have wanted the spin-off of the challenged magazine business for some time, mainly because the rise of Internet advertising has steadily eroded ad revenue from print publications.

Investors had come to see the magazine business as a drag on revenues and profits. According to the Publishers Information Bureau, U.S. magazine advertising revenue fell 3 percent in 2012 to $21 billion.

"Investors like pure plays and some instances where there are genuine synergies," he said. "I think they concluded it was a bit of an odd duck."

The person said that the parent company will continue to be known as Time Warner, keeping Time in its name despite the spin-off.

In conjunction with the move, Time Inc. CEO Laura Lang said she would step down after a successor had been found. In a memo to staff, she said that, "taking the company through a transition to the public markets is not where my passion lies."

Associated Press

Source: http://hosted2.ap.org/APDEFAULT/f70471f764144b2fab526d39972d37b3/Article_2013-03-06-US-Time-Warner-Time/id-03a3684deccf4ad0ba06e059e0365c3a

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বুধবার, ৬ মার্চ, ২০১৩

Smartphones? malware-free glory days may soon be over

RIO DE JANEIRO, March 5 (Reuters) - Brazil coach Luiz Felipe Scolari stood up for specialist dribbler Neymar on Tuesday, saying the flamboyant forward's reputation for falling down easily was undeserved and exaggerated. "He gets fouled 10 times a match, and possibly one or two of those free kicks shouldn't be awarded, but then that is normal in football," Scolari told a news conference on Tuesday. "The coaches who criticise Neymar, who claim he falls over or simulates fouls, do that because it's an easy way out for them. ...

Source: http://news.yahoo.com/smartphones-malware-free-glory-days-may-soon-over-125540110.html

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