Friday, January 20, 2012

Boa Constrictors Listen to Loosen

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Boa constrictors kept tightening their grip on dead rats with faked heartbeats for 20 minutes, but let go when the pulse stopped. Christopher Intagliata reports

More 60-Second Science

True to their name, boa constrictors squeeze the life out of their prey. But how does a boa know it's snuffed out a rat? The snake listens for a heartbeat. When it stops, that's the cue to let go, according to a study in the journal Biology Letters. [Scott M. Boback et al., "Snake modulates constriction in response to prey?s heartbeat"]

Researchers outfitted rat cadavers with artificial beating hearts. They used dead rats to control for other signs of passing, like muscle spasms. Then they warmed up the rats, set the hearts pumping, and dangled them in front of hungry boas.

The snakes attacked. And as long as that rat heart kept thumping, the boas kept tightening their coils and applying bursts of pressure, sometimes for more than 20 minutes. But as soon as scientists killed the heartbeat, the boas loosened up.

Even captive-born boas who'd never hunted live prey paid attention to the pulse?suggesting the behavior is innate. And for good reason. The authors say constriction takes a lot of energy. And it can be dangerous, say, if an enemy strikes while the snake's coiled around its quarry. But by following the telltale heart, boas can keep the pressure on just long enough. Before a relaxing meal.

?Christopher Intagliata

[The above text is a transcript of this podcast.]?


Source: http://rss.sciam.com/click.phdo?i=bb5b3bc0192b21acdee6be5be5235737

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Thursday, January 19, 2012

Obama rejects controversial Keystone oil pipeline

Michael Marshall, environment reporter

US president Barack Obama has rejected plans for a vast oil pipeline reaching from Canada to the Gulf of Mexico, The Washington Post is reporting.

The Keystone XL pipeline has been criticised by environmentalists, but promoted by Republicans because they argue it would create jobs.

Canadian energy infrastructure firm, TransCanada had applied for a permit to build the pipeline. It would ferry bitumen from the Alberta oil sands to refineries on the Gulf of Mexico. Environmentalists cited the enormous greenhouse gas emissions from the fuel that would be produced, as well as the risk to the sensitive ecosystem of the Nebraska Sandhills, through which the pipeline was planned to pass.

Last November the government announced a new environmental review of the project, delaying the final decision until 2013 - after the upcoming presidential election. However, late last year Republicans forced the government to make a decision within 60 days.

The rejection is not final - TransCanada will have the opportunity to reapply for a permit to build the pipeline along a route that avoids the Sandhills region. Still, Republicans - including US presidential candidate Mitt Romney - have reacted by excoriating Obama for his decision.

By turning down the permit, Romney said "the president demonstrates a lack of seriousness about bringing down unemployment, restoring economic growth and achieving energy independence", according to the Post's article.

And Agence France-Presse quotes John Boehner, speaker of the US House of Representatives and a Republican as saying:

If we don't build this pipeline to bring that Canadian oil, and take out the North Dakota oil and deliver it to our refineries in the Gulf Coast, that oil is going to be shipped out to the Pacific Ocean and be sold to the Chinese... This is not good for our country.

Canada is also developing another pipeline to carry bitumen away from the Alberta tar sands. The proposed Northern Gateway would terminate on the West Coast, in British Columbia, where it could be shipped across the Pacific to China.

By contrast, many environmentalists regard Keystone as a key test of Obama's green credentials, which have taken a battering since he came to office.

Source: http://feeds.newscientist.com/c/749/f/10897/s/1bf0523d/l/0L0Snewscientist0N0Cblogs0Cshortsharpscience0C20A120C0A10Cobama0Erejects0Econtroversial0Eke0Bhtml0DDCMP0FOTC0Erss0Gnsref0Fonline0Enews/story01.htm

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US wants effective Alzheimer's treatment by 2025 (AP)

WASHINGTON ? Effective treatments for Alzheimer's by 2025? That's the target the government is eyeing as it develops a national strategy to tackle what could become the defining disease of a rapidly aging population.

It's an ambitious goal ? and on Tuesday, advisers to the government stressed that millions of families need better help now to care for their loved ones.

"What's really important here is a comprehensive plan that deals with the needs of people who already have the disease," said Alzheimer's Association president Harry Johns, one of the advisers.

Already families approach the advisory committee "reminding us of the enormity of our task," said Dr. Ron Petersen, an Alzheimer's specialist at the Mayo Clinic who chairs the panel.

The Obama administration is developing the first National Alzheimer's Plan to address the medical and social problems of dementia ? not just better treatments but better day-to-day care for dementia patients and their overwhelmed caregivers, too.

The plan still is being written, with the advisory panel's input. But a draft of its overall goals sets 2025 as a target date to have effective treatments and ways to delay if not completely prevent the illness.

Some advisory members said that's not aggressive enough, and 2020 would be a better target date.

"We want to be bold," said Dr. Jennifer Manly of Columbia University. "We think the difference of five years is incredibly meaningful."

Regardless, an estimated 5.4 million Americans already have Alzheimer's or similar dementias ? and how to help their families cope with day-to-day care is a priority, the advisory committee made clear Tuesday.

The disease is growing steadily as the population ages: By 2050, 13 million to 16 million Americans are projected to have Alzheimer's, costing $1 trillion in medical and nursing home expenditures. That doesn't count the billions of dollars in unpaid care provided by relatives and friends.

Today's treatments only temporarily ease some dementia symptoms, and work to find better ones has been frustratingly slow. Scientists now know that Alzheimer's is brewing for years before symptoms appear, and they're hunting ways to stall the disease, maybe long enough that potential sufferers will die of something else first. But it's still early-stage work.

Meanwhile, as many as half of today's Alzheimer's sufferers haven't been formally diagnosed, a recent report found. That's in part because of stigma and the belief that nothing can be done. Symptomatic treatment aside, a diagnosis lets families plan, and catching Alzheimer's earlier would be crucial if scientists ever find a way to stall it, the advisory panel noted.

Among the goals being debated for the national plan:

_Begin a national public awareness campaign of dementia's early warning signs, to improve timely diagnosis.

_Give primary care doctors the tools to assess signs of dementia as part of Medicare's annual check-up.

_Have caregivers' health, physical and mental, regularly checked.

_Improve care-planning and training for families so they know what resources are available for their loved one and themselves.

A training program in New York, for instance, has proved that caregivers who are taught how to handle common dementia problems, and given support, are able to keep their loved ones at home for longer.

Such programs "are dirt cheap compared to paying for nursing home care," said David Hoffman, who oversees Alzheimer's programs for the New York State Department of Health.

But hanging over the meeting was the reality of a budget crunch. The government hasn't said how much money it will be able to devote to the Alzheimer's plan, and states have seen their own Alzheimer's budgets cut.

"We're not going to fix this without substantial resources," Hoffman said. "In New York, we're hanging on by our nails," he added.

Source: http://us.rd.yahoo.com/dailynews/rss/seniors/*http%3A//news.yahoo.com/s/ap/20120117/ap_on_he_me/us_med_alzheimer_s_plan

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Wednesday, January 18, 2012

(AP)

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Source: http://us.rd.yahoo.com/dailynews/rss/terrorism/*http%3A//news.yahoo.com/s/ap/20120118/ap_on_re_eu/eu_apnewsalert

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House to take up anti-piracy bill in February (Reuters)

WASHINGTON (Reuters) ? The House of Representatives will resume work next month on a controversial bill aimed at stopping online piracy of movies, music and other content, a leading lawmaker said on Tuesday.

The anti-piracy legislation has been a top priority for entertainment companies, publishers, pharmaceutical firms and others, who say it is critical to curbing online piracy.

Internet companies vigorously oppose the bills, arguing they would undermine innovation and free speech rights and compromise the functioning of the Internet.

The debate escalated over the weekend when White House officials raised concerns that the legislation could make businesses on the Internet vulnerable to litigation and harm legal activity and free speech.

Representative Lamar Smith, chairman of the House Judiciary Committee, said the proposed Stop Online Piracy Act (SOPA) was needed to protect American businesses from intellectual property theft, and that legislation would move forward.

"Due to the Republican and Democratic retreats taking place over the next two weeks, markup of the Stop Online Piracy Act is expected to resume in February," added Smith, a Texas Republican. "I am committed to continuing to work with my colleagues in the House and Senate to send a bipartisan bill to the White House."

The Senate is expected to begin voting on January 24 on how to proceed in considering its own version of the bill.

Both Smith and Democratic Senator Patrick Leahy have said that they plan to jettison a controversial portion of their bills which would block access for Internet users who seek stolen movies or music.

White House officials, including cyber-security czar Howard Schmidt, said in a blog posting on Saturday that they opposed the bills as currently written. But they said the Obama administration would work with lawmakers on a narrower, more targeted approach to online piracy to ensure that legitimate businesses - including start-up firms - would not be harmed.

Wikipedia, the popular community-edited online encyclopedia, will black out its English-language site for 24 hours Wednesday to oppose the legislation. Other smaller sites leading the campaign include Reddit.com.

(Reporting By Diane Bartz; Editing by Sandra Maler)

Source: http://us.rd.yahoo.com/dailynews/rss/digitalmusic/*http%3A//news.yahoo.com/s/nm/20120117/film_nm/us_usa_internet_piracy_house

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Tuesday, January 17, 2012

This week in The Slacktiverse, January 14/15 2012 (slacktivist)

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Source: http://news.feedzilla.com/en_us/stories/politics/top-stories/186792870?client_source=feed&format=rss

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Sudan and southern rebels clash in oil border state (Reuters)

KHARTOUM (Reuters) ? Sudan's army fought rebels in the oil-producing state of South Kordofan last week, both sides said on Saturday.

The rebels said they had killed nine government troops, but the army denied this.

Fighting has taken place since last June in South Kordofan between the Sudanese army and rebels from the northern wing of the Sudan People's Liberation Movement, who want to topple the Khartoum government.

Clashes spread to neighbouring Blue Nile state, which also borders newly independent South Sudan, in September.

The violence has already forced about 417,000 people to flee their homes, more than 80,000 of them to South Sudan, the United Nations estimates.

Both Blue Nile and South Kordofan contain large groups who sided with the south in a decades-long civil war, and who say they continue to face persecution inside Sudan since South Sudan seceded in July.

The SPLM is now the ruling party in the independent south and denies supporting SPLM-North rebels across the border.

The SPLM-North rebels said they had killed nine soldiers, destroyed three tanks and seized military equipment in clashes at Tees near the southern border on Monday. They also seized three army vehicles in another attack in the same area on Tuesday, they said in a statement.

Army spokesman Sawarmi Khalid Saad confirmed military operations had taken place in the town of Tees to reopen a road but denied any soldiers had been killed.

"These areas are under army control," he said.

Events in South Kordofan and Blue Nile are difficult to verify because aid groups and foreign journalists are banned from areas where fighting takes place.

SPLM-North is one of a number of rebel movements in underdeveloped border areas who say they are fighting to overthrow Sudan's President Omar Hassan al-Bashir and end what they see as the dominance of the Khartoum political elite.

Sudan and South Sudan, who still have to resolve a range of issues including the sharing of oil revenues, regularly trade accusations of supporting insurgencies on each other's territory.

Their armed forces clashed at Jau in a region claimed by both sides last month in a rare direct confrontation.

Locals have faced air raids and sporadic ground fighting, according to rights groups and refugees, although Sudan denies it is bombing civilian areas.

(Reporting by Khalid Abdelaziz; Writing by Ulf Laessing; Editing by Ben Harding and Peter Graff)

Source: http://us.rd.yahoo.com/dailynews/rss/africa/*http%3A//news.yahoo.com/s/nm/20120114/wl_nm/us_sudan_fighting

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