Wednesday, April 3, 2013

Why some handle stress better than others


For some students, just going to school can be very stressful.? Add standardized tests to the mix, and even a gifted student can be unnerved.? ?

Performing well on high school competency exams opens the door to a student?s academic future like never before.? In some cases, the pressure has even filtered down to elementary school?where competition for collegiate scholarships has found a surprising new starting place.

In this Just Explain It, we?ll break down the science behind why some students perform well under pressure, while others don?t.? We?ll also look into what can be done to help students perform better in stressful situations.

Researchers have found that the success of some students can be linked to how fast dopamine is cleared from their brain.

Dopamine is a chemical messenger that helps transmit signals between nerve cells of the brain.? The chemical has many functions, playing important roles in behavior and cognition, attention, working memory and learning. Our brains work best when there?s not too much or too little dopamine.

That?s where what?s known as the COMT gene comes into play - and it comes in the form of two variants. The fast variant removes dopamine quickly and the slow variant removes the chemical gradually.

Studies of people in two environments were conducted?one under normal conditions, the other under stressful conditions.? It was found that under normal conditions, people with the slow-acting COMT gene excelled when performing mental tasks.?? Under those conditions, people with the fast-acting gene didn?t perform as well.

The outcome was reversed when people were subjected to a great deal of stress.? That?s because dopamine overloads the brains of people with the slow-acting gene? ? hampering their ability.? You see, dopamine rises in stressful situations.? So in this circumstance, the fast-acting gene keeps the brain?s dopamine at normal levels.

The COMT gene variants have also been shown to actually predict the activity of regions of the brain involved in cognition and emotional responses, said David Goldman, a National Institutes of Health scientist and author of ?Our Genes Our Choices.? This gene is an example of the genetic reasons why people?s brains work a little differently, and how the expression of these differences is altered by the contexts in which people find themselves, and choose.

How this all works has been studied in real life situations.? Researchers in Taiwan followed 779 students who took the national competency exam.? Under more stress than usual, students with the slow-acting enzymes scored eight percent lower on average than those with the fast-acting ones.? ?

There?s no need to worry though, it?s not either/or for most people.?? About 50 percent of all people inherit one of each gene variation from their parents.? So that means most people have medium acting enzymes. The other half is split between fast and slow acting genes.

Researchers also found that experience leveled the playing field.? The more practice someone had at performing tasks, the less likely they were to melt under pressure.

We know that practice makes perfect, but here are some other things that can help students reduce stress. ?

1.? Eat healthy.? Meals should include fruits and vegetables.
2.? Exercise regularly.
3.? Do things you enjoy often like, hobbies, sports and reading.
4.? Make sure you get enough sleep.
5.? Learn relaxation techniques like, meditation and deep breathing.

Research from the University of Missouri shows that being involved in school activities like, chess, spelling bees or science fairs gives students a chance to perform.? Some of these moments might be very stressful, but there?s a chance they could payoff in the end. ?

Did you learn something? Do you have a topic you?d like explained?? Give us your feedback in the comments below or on Twitter using #JustExplainIt.?

Source: http://news.yahoo.com/just-explain-it--students---stress-140418857.html

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Cooling factory activity hints at slowing economy

By Lucia Mutikani

WASHINGTON (Reuters) - Factory activity grew at the slowest rate in three months in March, suggesting the economy lost some momentum at the end of the first quarter as the effects of tighter fiscal policy started kicking in.

Data so far this year had shown little sign that higher taxes, and the $85 billion in across-the-board government spending cuts that took effect March 1 known as the "sequester," had weighed on economic activity.

"It suggests the economy was probably starting to slow at the end of the quarter, possibly reflecting the impact of the fiscal headwinds coming from sequestration and higher taxes," said Millan Mulraine, a senior economist at TD Securities in New York.

The Institute for Supply Management said on Monday its index of national factory activity fell to 51.3 last month from 54.2 in February. A reading above 50 indicates expansion in the manufacturing sector. New orders, a key indicator of future growth, accounted for much of the drop in the index.

The ISM report was at odds with a separate report showing that factories gained steam in March on strong order growth, closing out the best quarter for the sector in two years.

Financial data firm Markit said its Manufacturing Purchasing Managers Index rose to 54.6 last month from 54.3 in February. A reading above 50 indicates expansion.

While the two surveys use the same sub-indexes, they assign different weights to the components.

Economists and investors placed more emphasis on the ISM survey, which has a longer history and has been generally a good gauge of overall U.S. economic activity.

U.S. stock prices fell in light trade, with the Standard & Poor's 500 index stepping back from last Thursday's record closing high. U.S. financial markets were closed on Friday for Good Friday.

The price for the longer-dated U.S. government bond rose, while the dollar fell to a near month low against the yen.

"We are beginning to see where the government spending cuts will reduce demand," said Joel Naroff, chief economist at Naroff Economic Advisors in Holland, Pennsylvania. "In those sectors and parts of the country that will feel the wrath of sequestration, adjustments are being made."

ROBUST FIRST-QUARTER GROWTH EYED

The U.S. Labor Department employment report for March to be released on Friday could shed more light on the U.S. economy's health.

Though factory activity slowed last month, there were pockets of strength. Export orders approached a year high and factory employment was the highest since June.

In addition, both manufacturers and their customers maintained lean inventories, which economists said pointed to a ramping up of activity later this year.

Last month's pullback did not, however, change perceptions that economic growth in the first quarter accelerated after almost stalling in the last three months of 2012.

The upbeat picture for the first quarter was bolstered by a Commerce Department report on Monday showing that construction spending advanced 1.2 percent in February. Spending had declined 2.1 percent in January.

The construction report added to a series of other data that has suggested economic growth accelerated in the first quarter from the fourth quarter's anemic 0.4 percent annual pace.

Data on employment, consumer spending, industrial production and housing have been relatively strong.

Some economists raised their growth estimates for the January-March period in the wake of the construction report.

Macroeconomic Advisers lifted its forecast by one-tenth of a point to 3.6 percent. JPMorgan raised its estimate from 2.7 percent to 3.8 percent. Part of the increase reflected strong consumer spending.

The U.S. Commerce Department released the consumer spending report on Friday, when financial markets were closed.

Construction spending in February was boosted by a 1.3 percent rise in private construction projects. Spending on private residential projects increased 2.2 percent to the highest level since November 2008.

Part of the increase reflected renovations. The housing market is no longer a drag on the economy and residential construction contributed to growth last year for the first time since 2005. It is expected to do so again this year.

"Housing is catching fire," said Ryan Sweet, a senior economist at Moody's Analytics in West Chester, Pennsylvania. "All the conditions are in place for further improvement with housing even with lingering risks. Housing will keep the economy going forward even with the fiscal constraints."

Spending on private nonresidential structures rose 0.4 percent after declining 5.9 percent.

Public sector construction spending increased 0.9 percent, rising for a second straight month. Outlays on federal government projects fell 1.1 percent.

State and local spending, which is far larger than federal projects, rose 1.1 percent. It was the second straight month of gain in state and local government outlays.

(Additional reporting by Luciana Lopez, Steven C. Johnson and Richard Leong in New York; editing by Neil Stempleman, Leslie Adler and James Dalgleish)

Source: http://news.yahoo.com/manufacturing-sector-expansion-slows-march-ism-140720404--business.html

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Monday, April 1, 2013

Kwame Harris, Ex-NFL Player, Comes Out as Gay

Source: http://www.thehollywoodgossip.com/2013/03/kwame-harris-ex-nfl-player-comes-out-as-gay/

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Star Caught Circling Black Hole at Record-Breaking Speed

Astronomers have spotted a star in our galaxy that races around a black hole at a breakneck speed, orbiting once every 2.4 hours, scientists say.

The?black hole?in the spinning duo is known as MAXI J1659-152 and is at least three times more massive than the sun. The star, meanwhile, is a red dwarf with a mass just one-fifth that of the sun and is just 620,000 miles (1 million kilometers) from the black hole, according to the European Space Agency, which announced the discovery on Tuesday (March 19).

"The companion star revolves around the common center of mass at a dizzying rate, almost 20 times faster than Earth orbits the sun," astronomer Erik Kuulkers, of ESA's European Space Astronomy Centre in Spain, said in a statement. "You really wouldn't like to be on such a merry-go-round in this galactic fair!"

The two objects orbit a common center of mass. Because the star is the lighter, it has a larger orbit and has to travel at a remarkable speed of 1.2 million mph (2 million km/h), making it the fastest moving star ever seen in an X-ray binary system. The black hole, meanwhile, orbits at about 93,000 mph (150,000 km/h), ESA officials said. The space agency created a video animation of the black hole and ultra-fast star to illustrate the odd setup.

The pair was initially thought to be a gamma-ray burst when NASA's Swift space telescope first spotted it on Sept. 25, 2010.? Japan's MAXI telescope on the?International Space Station?also observed a bright X-ray source at the same place on that same day.

More observations revealed that the X-rays came from a black hole siphoning material from a tiny star companion. From dips in these X-ray emissions during a 14.5-hour observation with ESA's XMM-Newton space telescope, astronomers calculated that the star's orbital period was just 2.4 hours. This orbital period smashes the previous record of 3.2 hours, held by Swift J1753.5?0127.

The newfound pair lies high above the galactic plane, meaning it is out of the main disc of?our spiral Milky Way galaxy?? a characteristic shared by only two other black-hole binary systems, including Swift J1753.5?0127.

"These high galactic latitude locations and short orbital periods are signatures of a potential new class of binary system, objects that may have been kicked out of the galactic plane during the explosive formation of the black hole itself," Kuulkers said.

Follow SPACE.com on Twitter?@Spacedotcom. We're also on?Facebook?and?Google+. Original story at SPACE.com.

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

Source: http://news.yahoo.com/star-caught-circling-black-hole-record-breaking-speed-150432317.html

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