Friday, 31 May 2013

Why animals compare the present with the past

May 30, 2013 ? Humans, like other animals, compare things. We care not only how well off we are, but whether we are better or worse off than others around us, or than we were last year. New research by scientists at the University of Bristol shows that such comparisons can give individuals an evolutionary advantage.

According to standard theory, the best response to current circumstances should be unaffected by what has happened in the past. But the Bristol study, published in the journal Science, shows that in a changing, unpredictable world it is important to be sensitive to past conditions.

The research team, led by Professor John McNamara in Bristol's School of Mathematics, built a mathematical model to understand how animals should behave when they are uncertain about the pattern of environmental change. They found that when animals are used to rich conditions but then conditions suddenly worsen, they should work less hard than animals exposed to poor conditions all along.

The predictions from the model closely match findings from classic laboratory experiments in the 1940s, in which rats were trained to run along a passage to gain food rewards. The rats ran more slowly for small amounts of food if they were used to getting large amounts of food, compared to control rats that were always rewarded with the smaller amount.

This so-called 'contrast effect' has also been reported in bees, starlings and a variety of mammals including newborn children, but until now it lacked a convincing explanation.

Dr Tim Fawcett, a research fellow in Bristol's School of Biological Sciences and a co-author on the study, said: "The effects in our model are driven by uncertainty. In changing environments, conditions experienced in the past can be a valuable indicator of how things will be in the future."

This, in turn, affects how animals should respond to their current situation. "An animal that is used to rich conditions thinks that the world is generally a good place," Dr Fawcett explained. "So when conditions suddenly turn bad, it interprets this as a temporary 'blip' and hunkers down, expecting that rich conditions will return soon. In contrast, an animal used to poor conditions expects those conditions to persist, and so cannot afford to rest."

The model also predicts the reverse effect, in which animals work harder for food when conditions suddenly improve, compared to animals experiencing rich conditions all along. This too has been found in laboratory experiments on a range of animals.

The Bristol study highlights unpredictable environmental fluctuations as an important evolutionary force. "Rapid changes favour individuals that are responsive and able to adjust their behaviour in the light of past experience," said Dr Fawcett. "The natural world is a dynamic and unpredictable place, but evolutionary models often neglect this. Our work suggests that models of more complex environments are important for understanding behaviour."

Source: http://feeds.sciencedaily.com/~r/sciencedaily/top_news/~3/aIWs62NcHWE/130530142003.htm

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AP sources: Obama to name ex-Bush aide to head FBI

FILE - In this Jan. 14, 2004 file photo, Deputy Attorney General James Comey gestures during a news conference in Washington. President Barack Obama is preparing to nominate former Bush administration official James Comey to head the FBI, people familiar with the decision said Wednesday, May 29, 2013. (AP Photo/Evan Vucci, File)

FILE - In this Jan. 14, 2004 file photo, Deputy Attorney General James Comey gestures during a news conference in Washington. President Barack Obama is preparing to nominate former Bush administration official James Comey to head the FBI, people familiar with the decision said Wednesday, May 29, 2013. (AP Photo/Evan Vucci, File)

(AP) ? President Barack Obama is prepared to nominate James Comey, a former Bush administration official with bipartisan credentials, as the next FBI director. In a possible warning sign, the top Republican on the Senate committee that would review the nomination said Comey would face questions about his ties to Wall Street.

Three people with knowledge of the selection said Wednesday that Obama planned to nominate Comey, who was the No. 2 at the Justice Department under President George W. Bush. Comey was general counsel to Connecticut-based hedge fund Bridgewater Associates from 2010 until earlier this year and now lectures at Columbia Law School.

Comey would replace Robert Mueller, who has held the job since shortly before the Sept. 11, 2001, attacks, which forced the FBI to transform itself into one of the nation's chief weapons in the war on terror. Mueller's last day on the job is Sept. 4.

The White House may hope that Comey's Republican background will help him through Senate confirmation at a time when some of Obama's nominations have been facing tough battles. But Iowa Sen. Chuck Grassley, the top Republican on the Senate Judiciary Committee, indicated Comey's confirmation hearing would raise questions about the Obama administration's investigations of Wall Street.

Grassley said in a statement late Wednesday he had not heard from the White House about Comey's nomination but said Comey possessed a lot of important experience on national security issues.

"But, if he's nominated, he would have to answer questions about his recent work in the hedge fund industry," Grassley said. "The administration's efforts to criminally prosecute Wall Street for its part in the economic downturn have been abysmal, and his agency would have to help build the case against some of his colleagues."

The change in leadership comes as the FBI and Justice Department are under scrutiny for their handing of several investigations. Obama has ordered a review of FBI investigations into leaks to reporters, including the secret gathering of Associated Press phone records and emails of a Fox News reporter. And there have been questions raised about whether the FBI properly responded to warnings from Russian authorities about a suspect in the Boston Marathon bombings. The agency, meanwhile, is conducting a highly anticipated investigation into the Internal Revenue Service over its handling of conservative groups seeking tax exempt status.

Comey was deputy attorney general in 2005 when he unsuccessfully tried to limit tough interrogation tactics against suspected terrorists. He told then-Attorney General Alberto Gonzales that some of the practices were wrong and would damage the department's reputation.

Some Democrats denounced those methods as torture, particularly the use of waterboarding, which produces the sensation of drowning.

Comey's selection was first reported by NPR and was not expected to be announced for several days at least. It was confirmed to the AP by three people speaking on condition of anonymity because they were not authorized to discuss the selection ahead of Obama's announcement. Senate confirmation will be needed.

Comey became a hero to Democratic opponents of Bush's warrantless wiretapping program when Comey refused for a time to reauthorize it. Bush revised the surveillance program when confronted with the threat of resignation by Comey and Mueller.

Earlier in his career, Comey served as U.S. attorney for the Southern District of New York, one of the nation's most prominent prosecutorial offices and one at the front lines of terrorism, corporate malfeasance, organized crime and the war on drugs.

As an assistant U.S. attorney in Virginia, Comey handled the investigation of the 1996 bombing of the Khobar Towers housing complex near Dhahran, Saudi Arabia, which killed 19 U.S. military personnel.

He led the Justice Department's corporate fraud task force and spurred the creation of violent crime impact teams in 20 cities, focusing on crimes committed with guns.

Comey was at the center of one of the Bush administration's great controversies ? an episode that focused attention on the administration's controversial tactics in the war on terror.

In stunning testimony to the Senate Judiciary Committee in 2007, Comey said he thought Bush's no-warrant wiretapping program was so questionable that Comey refused for a time to reauthorize it, leading to a standoff with White House officials at the bedside of ailing Attorney General John Ashcroft.

Comey said he refused to recertify the program because Ashcroft had reservations about its legality.

Senior government officials had expressed concerns about whether the National Security Agency, which administered the warrantless eavesdropping program, had the proper oversight in place. Other concerns included whether any president possessed the legal and constitutional authority to authorize the program as it was carried out at the time.

The White House, Comey said, recertified the program without the Justice Department's signoff, allowing it to operate for about three weeks without concurrence on whether it was legal. Comey, Ashcroft, Mueller and other Justice Department officials at one point considered resigning, Comey said.

"I couldn't stay if the administration was going to engage in conduct that the Department of Justice had said had no legal basis," Comey told the Senate panel.

A day after the March 10, 2004, incident at Ashcroft's hospital bedside, Bush ordered changes to the program to accommodate the department's concerns. Ashcroft signed the presidential order to recertify the program about three weeks later.

The dramatic hospital confrontation involved Comey, who was the acting attorney general during Ashcroft's absence, and a White House team that included Gonzales, Bush's counsel at the time, and White House chief of staff Andy Card, Comey said. Gonzales later succeeded Ashcroft as attorney general.

Comey testified that when he refused to certify the program, Gonzales and Card headed to Ashcroft's sick bed in the intensive care unit at George Washington University Hospital.

When Gonzales appealed to Ashcroft, the ailing attorney general lifted his head off the pillow and in straightforward terms described his views of the program, Comey said. Then he pointed out that Comey, not Ashcroft, held the powers of the attorney general at that moment.

Gonzales and Card then left the hospital room, Comey said.

"I was angry," Comey told the panel. "I thought I had just witnessed an effort to take advantage of a very sick man who did not have the powers of the attorney general."

___

Associated Press writer Pete Yost contributed to this report.

___

Follow Nedra Pickler on Twitter at https://twitter.com/nedrapickler

Associated Press

Source: http://hosted2.ap.org/APDEFAULT/3d281c11a96b4ad082fe88aa0db04305/Article_2013-05-30-Obama-FBI/id-e01ff3eb899b4cb08490eab3376d3918

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Mariah Carey leaving 'Idol'

NEW YORK (AP) ? Mariah Carey says she isn't retuning to "American Idol."

The pop star's publicity firm, PMK BNC, tweeted Thursday that Carey isn't returning to the Fox series and is planning a world tour thanks to the success of her new single, "Beautiful."

Carey became a new judge on "Idol" last year along with Keith Urban and Nicki Minaj. She and Minaj bickered on the show, creating a feud that was uncomfortable for both viewers and contestants.

Fox said in a statement that the network is "extremely fortunate that (Carey) was able to bring her wisdom and experience" to the show.

Randy Jackson announced that he was also leaving the show.

Carey's new single, a Top 20 hit on the Billboard Hot 100 chart, features Miguel.

___

Online:

http://www.mariahcarey.com

Source: http://news.yahoo.com/mariah-carey-not-returning-american-idol-213715453.html

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Organic polymers show sunny potential: Groundwork laid for block copolymer solar cells

May 29, 2013 ? A new version of solar cells created by laboratories at Rice and Pennsylvania State universities could open the door to research on a new class of solar energy devices.

The photovoltaic devices created in a project led by Rice chemical engineer Rafael Verduzco and Penn State chemical engineer Enrique Gomez are based on block copolymers, self-assembling organic materials that arrange themselves into distinct layers. They easily outperform other cells with polymer compounds as active elements.

The discovery is detailed online in the American Chemical Society journal Nano Letters.

While commercial, silicon-based solar cells turn about 20 percent of sunlight into electricity and experimental units top 25 percent, there's been an undercurrent of research into polymer-based cells that could greatly reduce the cost of solar energy, Verduzco said. The Rice/Penn State cells reach about 3 percent efficiency, but that's surprisingly better than other labs have achieved using polymer compounds.

"You need two components in a solar cell: one to carry (negative) electrons, the other to carry positive charges," Verduzco said. The imbalance between the two prompted by the input of energy -- sunlight -- creates useful current.

Since the mid-1980s, researchers have experimented with stacking or mixing polymer components with limited success, Verduzco said. Later polymer/fullerene mixtures topped 10 percent efficiency, but the fullerenes -- in this case, enhanced C-60 buckyballs -- are difficult to work with, he said.

The Rice lab discovered a block copolymer -- P3HT-b-PFTBT -- that separates into bands that are about 16 nanometers wide. More interesting to the researchers was the polymers' natural tendency to form bands perpendicular to the glass. The copolymer was created in the presence of a glass/indium tin oxide (ITO) top layer at a modest 165 degrees Celsius.

With a layer of aluminum on the other side of the device constructed by the Penn State team, the polymer bands stretched from the top to bottom electrodes and provided a clear path for electrons to flow.

"On paper, block copolymers are excellent candidates for organic solar cells, but no one has been able to get very good photovoltaic performance using block copolymers," Verduzco said. "We didn't give up on the idea of block copolymers because there's really only been a handful of these types of solar cells previously tested. We thought getting good performance using block copolymers was possible if we designed the right materials and fabricated the solar cells under the right conditions."

Mysteries remain, he said. "It's not clear why the copolymer organizes itself perpendicular to the electrodes," he said. "Our hypothesis is that both polymers want to be in contact with the ITO-coated glass. We think that forces this orientation, though we haven't proven it yet."

He said the researchers want to experiment with other block copolymers and learn to control their structures to increase the solar cell's ability to capture photons and turn them into electricity. Once they have achieved higher performance from the cells, the team will look at long-term use.

"We'll focus on performance first, because if we can't get it high enough, there's no reason to address some of the other challenges like stability," Verduzco said. Encapsulating a solar cell to keep air and water from degrading it is easy, he said, but protecting it from ultraviolet degradation over time is hard. "You have to expose it to sunlight. That you can't avoid."

Co-authors of the paper are Rice graduate students Yen-Hao Lin and Kendall Smith; Penn State graduate student Changhe Guo and undergraduate Matthew Witman; Argonne National Laboratory researcher Joseph Strzalka; Lawrence Berkeley National Laboratory postdoctoral researcher Cheng Wang and staff scientist Alexander Hexemer; and Enrique Gomez, an assistant professor in the Penn State Department of Chemical Engineering. Verduzco is an assistant professor of chemical and biomolecular engineering.

The National Science Foundation, the Department of Energy, the Welch Foundation, the Shell Center for Sustainability and the Louis and Peaches Owen Family Foundation supported the research.

Source: http://feeds.sciencedaily.com/~r/sciencedaily/~3/jYmGWf_o20g/130529154648.htm

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Michele Bachmann: Yes, it's time to leave Congress (Washington Post)

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Source: http://news.feedzilla.com/en_us/stories/politics/top-stories/309110566?client_source=feed&format=rss

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Wednesday, 8 May 2013

MVP voter explains why he didn't choose LeBron

Miami Heat's LeBron James, left, and Kia Motors' Percy Vaughn pose for photos during an NBA basketball news conference, Sunday, May, 5, 2013, in Miami. James was formally announced as having won his fourth Most Valuable Player award Sunday. (AP Photo/J Pat Carter)

Miami Heat's LeBron James, left, and Kia Motors' Percy Vaughn pose for photos during an NBA basketball news conference, Sunday, May, 5, 2013, in Miami. James was formally announced as having won his fourth Most Valuable Player award Sunday. (AP Photo/J Pat Carter)

(AP) ? The writer who did not choose LeBron James of the Miami Heat as the NBA's Most Valuable Player believes Carmelo Anthony "meant more to his team" this season.

Gary Washburn of The Boston Globe says Anthony made the New York Knicks relevant again by leading them to their first division title in nearly two decades. Washburn's explanation was published Monday, one day after James won his fourth MVP award.

Washburn says the Knicks would not have made the playoffs without Anthony, while the Heat have plenty of other talent besides James. Washburn also says that he believes James will eventually become the league's first seven-time MVP and that his vote was "no LeBron conspiracy."

James collected 120 of 121 first-place votes. The NBA has never had a unanimous MVP selection.

Associated Press

Source: http://hosted2.ap.org/APDEFAULT/347875155d53465d95cec892aeb06419/Article_2013-05-06-BKN-NBA-MVP-Voter/id-d5f436ce816a4f83b441259b4b67c397

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Tuesday, 7 May 2013

This Bee Skyscraper Could Help Decimated Populations Thrive

Bees: they?ve had a tough couple of years. Between the mysterious Colony Collapse Disorder and pesticide poisoning, the Department of Agriculture recently estimated that around ten million hives have been lost over the past seven years.

Read more...

    


Source: http://feeds.gawker.com/~r/gizmodo/full/~3/bpBCtro07Us/this-bee-skyscraper-could-help-decimated-populations-th-493702507

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CA-NEWS Summary

Israel says 'no winds of war' despite Syria air strikes

JERUSALEM/AMMAN (Reuters) - Israel played down weekend air strikes close to Damascus reported to have killed dozens of Syrian soldiers, saying they were not aimed at influencing its neighbor's civil war but only at stopping Iranian missiles reaching Lebanese Hezbollah militants. Oil prices spiked above $105 a barrel, their highest in nearly a month, on Monday as the air strikes on Friday and Sunday prompted fears of a wider spillover of the two-year-old conflict in Syria that could affect Middle East oil exports.

Espionage fuels China's fast-paced military buildup: Pentagon

WASHINGTON (Reuters) - China is using espionage to acquire technologies to fuel its fast-paced military modernization program, the Pentagon said on Monday in an annual report that for the first time accused Beijing of trying to break into U.S. defense computer networks. In its 83-page annual report to Congress on Chinese military developments, the Pentagon also cited progress in Beijing's effort to develop advanced-technology stealth aircraft and build an aircraft carrier fleet to project power further offshore.

Anwar vows to reform Malaysia election system

KUALA LUMPUR (Reuters) - Malaysian opposition leader Anwar Ibrahim vowed on Tuesday to lead a "fierce movement" to reform the country's electoral system and challenge the results of an election he lost, starting with a rally of supporters this week. Anwar has refused to accept the victory of the long-ruling Barisan Nasional (BN) coalition in Sunday's election, saying that the result was tainted by widespread fraud, including the use of foreign immigrants to vote for the governing alliance.

Pakistan election violence forces candidates behind high walls

PESHAWAR, Pakistan (Reuters) - Mian Hussain is fighting for his political life from a deserted party headquarters, where two telephones sit silently beside him and the footsteps of a tea boy echo down the corridor. One of Pakistan's most high-profile anti-Taliban politicians, Hussain hasn't been to a single public event since campaigning for the May 11 election kicked off. A fiery orator who once electrified big rallies, he now makes short speeches by telephone to small huddles of supporters meeting in secret.

North Korea missiles moved away from launch site: U.S. officials

WASHINGTON (Reuters) - North Korea has taken two Musudan missiles off launch-ready status and moved them from their position on the country's east coast, U.S. officials told Reuters on Monday, after weeks of concern that Pyongyang had been poised for a test-launch. U.S. Secretary of State John Kerry warned North Korea last month that it would be a "huge mistake" to launch the medium-range missiles, but the prospects of a test had put Seoul, Washington and Toyko on edge.

At least 20 dead in Islamist protests in Bangladesh

DHAKA (Reuters) - At least 20 Bangladeshis were killed on Monday in clashes between police and hardline Islamists demanding religious reforms, as violence spread beyond the capital Dhaka to other parts of the country. The clashes began on Sunday after 200,000 Islamist supporters marched in Dhaka to press demands critics said would amount to the "Talibanisation" of a country that maintains secularism as state policy, but they were met by lines of police firing teargas and rubber bullets.

Iran presidency candidates to step forward, finally

DUBAI (Reuters) - Few Iranian presidential elections have been so unpredictable but the next few days will at least narrow down who will stand in the ballot on June 14, for which candidate registration starts on Tuesday and ends on Saturday. What is certain is that Ayatollah Ali Khamenei, who has held ultimate power as Supreme Leader for 24 years, wants to avoid both the mass protests by reformists that greeted the disputed re-election of Mahmoud Ahmadinejad in 2009, and also more of the public feuding between the outgoing president's allies and fellow hardliners which has marked Ahmadinejad's second term.

Bombs, mosque attack kill 17 in Iraqi capital: police

BAGHDAD (Reuters) - At least 17 people were killed by three bombs and a grenade attack on a mosque in the Iraqi capital Baghdad on Monday, medics and police said. Unidentified assailants threw hand grenades at Sunni Muslim worshippers as they left a mosque on Monday evening, killing six people, police and medics said.

Teenager accused of lying in Boston bomb case out on bail

BOSTON (Reuters) - The teenager accused of lying to FBI agents in the Boston Marathon bombing case was freed on $100,000 bail on Monday pending a later trial date, and investigators said bomb fragments suggest they were less sophisticated than homemade ones used by insurgents. While out on bail, Robel Phillipos will be under the custody of his mother and must wear a GPS bracelet, U.S. Magistrate Judge Marianne Bowler ordered in federal court in Boston. The $100,000 bail for the 19-year-old was secured by real estate put up by a third party, the judge said.

Bahraini lawmakers call on U.S. envoy to end "interference"

DUBAI (Reuters) - Bahraini lawmakers have urged the government to stop the U.S. ambassador in Bahrain from "interfering in domestic affairs" and meeting government opponents, newspaper reports and a lawmaker in the U.S.-allied Gulf state said on Monday. The reports said the government had agreed to the proposal and would take diplomatic measures, but it was not immediately clear what those steps would entail.

Source: http://news.yahoo.com/ca-news-summary-044116478.html

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How Do We Split Life Insurance In Divorce? | Bankrate.com

Jack HungelmannDear Insurance Adviser,
I just got divorced, and the judge ordered both of us to split all annuities, insurance policies, bank accounts, etc.

My ex says there is no value in his $100,000 term life insurance naming me as the beneficiary, so he took my name off the policy. That doesn't sound right, but I am confused about how to split a life insurance policy when we are both living. Don't you have to pass away before anyone can collect? Should I believe my ex and just forget about this policy?
-- Patricia

Dear Patricia,
The judge ruled that you split all cash and cash equivalents. One form of the latter is cash value in a permanent life insurance policy. Since a term life insurance policy has no cash value in most cases, your ex is correct. If he dies while the policy is in force, the $100,000 death benefit will be paid to his current beneficiary. He apparently is the owner of the policy -- the person who pays the premium and who is the only person authorized to change beneficiaries.

If the original purpose of the $100,000 term life insurance policy still exists and involves helping you care for any children you have together and if you would have the children full time in the event of his death, he might be willing (with or without the court's help) to transfer the ownership of the policy and the payment of premiums to you. Then you can name yourself as the beneficiary. He could pay the premiums, of course, but it's better that you pay them. It's one less thing for the two of you to hassle over.

On the other hand, if the purpose of the life insurance originally was to do something such as pay off a mortgage or other debt, it's probable the need no longer exists.

Good luck.

Source: http://www.bankrate.com/finance/insurance/split-life-insurance-in-divorce.aspx

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