Enhancements With Breast Implants | Jackie's Women's Interest ...

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Breast implants give you the chance to have the size and appearance that you want. This will help you feel better about your own body, regardless of the reason that you want them.

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Straight Talk about Cosmetic Surgery (Yale University Press Health & Wellness)The public?s recent exuberance toward cosmetic surgery has spurred an unprecedented demand for appearance-changing procedures. But how can an average consumer discern the hype from solid truth?? Which of the many treatments available can fulfill the promise of a more youthful look, or more beautiful skin, or a more pleasing body shape? Which procedures don?t work at all?
In this up-to-the-minute guide, Dr. Arthur W. Perry, a practicing plastic surgeon for more than two decades, examines in close detail each of today?s surgical and nonsurgical procedures. In everyday language, aided by more than a hundred illustrations, he assesses the benefits and potential complications of legitimate treatments.? He also identifies and frankly discusses ineffective treatments. Dr. Perry?s empowering book guides you through the seductive and somewhat slick world of cosmetic surgery.? He offers criteria for selecting good doctors and facilities. In short, he has written an essential book for anyone who is contemplating cosmetic surgery or other skin-care procedures.
Includes expert?advice on:
??Facial rejuvenation including lifts, wrinkle fillers, and peels
??Body contouring from liposuction and tummy tucks to?breast implants, reductions, and lifts
??Botox and laser treatments
??Avoiding fraud and procedures that don?t work
??And much more Buying Beauty: Cosmetic Surgery in China

Cosmetic surgery in China has grown rapidly in recent years of dramatic social transition. Facing fierce competition in all spheres of daily life, more and more women consider cosmetic surgery as an investment to gain "beauty capital" to increase opportunities for social and career success.

Building on rich ethnographic data, this book presents the perspectives of women who have undergone cosmetic surgery, illuminating the aspirations behind their choices. Wen Hua explores how turbulent economic, sociocultural, and political changes in China since the 1980s have produced immense anxiety that is experienced both mentally and corporeally. This book will appeal to readers who are interested in gender studies, China studies, anthropology and sociology of the body, and cultural studies.

Cosmetic Surgery (LANGE Clinical Medicine)

Full-color, step-by-step guidance on how to perform the most popular procedures in cosmetic surgery

Using more than 250 full-color illustrations and photos, and clear, concise text, Cosmetic Surgery teaches you how to perform the latest and most in-demand surgical and non-surgical procedures in aesthetic plastic surgery. Each chapter includes patient selection and preparation, technique, complications, outcomes assessment, and references, and many illustrations that have been prepared specifically for this book.

FEATURES:

• A consistent, easy-to-navigate approach that facilitates quick learning
• More than 250 full-color illustrations that clarify each step of every procedure
• Expert authorship by experienced plastic surgeons

COMPREHENSIVE COVERAGE OF:

• Facial surgeries including facelift, brow lift, blepharoplasty, otoplasty, rhinoplasty, and chin implants
• Breast surgery, body contouring, and bariatric plastic surgery including breast augmentation, breast reduction, abdominoplasty, brachioplasty, and liposuction
• Non-surgical options including Botox, injectable fillers, chemical peel, dermabrasion, and laser surgery
• Other considerations such as new developments in cosmetic surgery, the business of cosmetic surgery, and the public?s view of cosmetic surgery

Tags: cosmetic surgery

Source: http://www.jackiesbazaar.com/womensinterests/cosmetic-surgery/enhancements-with-breast-implants

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Researchers calculate the global highways of invasive marine species

Monday, May 6, 2013

Globalisation, with its ever increasing demand for cargo transport, has inadvertently opened the flood gates for a new, silent invasion. New research has mapped the most detailed forecast to date for importing potentially harmful invasive species with the ballast water of cargo ships.

Scientists from the Universities of Bristol, UK, and Oldenburg, Germany, have examined ship traffic data and biological records to assess the risk of future invasions. Their research is published in the latest issue of Ecology Letters.

Animals and plants can hitch a ride on cargo ships, hiding as stowaways in the ballast tanks or clinging to the ship's hull. Upon arrival in a new port, alien species can then wreak havoc in formerly pristine waters. These so-called invasive species can drive native species to extinction, modify whole ecosystems and impact human economy.

Some regions, such as the San Francisco Bay or Chesapeake Bay, have even reported several new exotic species per year. The knock-on effects to fishermen, farmers, tourism and industry create billions of US dollars in damage every year. Conservationists and ship engineers are now trying to prevent the next big invasion. But without knowing when and where it may occur, their possibilities remain limited.

As part of the research project, funded by the Volkswagen Foundation, the team obtained detailed logs of nearly three million ship voyages in 2007 and 2008. Depending on the particular route travelled by each ship, the researchers estimated the probability that a species survives the journey and establishes a population in subsequent ports of call. Although this probability is tiny for any single voyage, the numbers quickly add up because modern cargo traffic volumes are enormous.

Professor Bernd Blasius from the University of Oldenburg and one of the researchers involved in the study, said: "Our model combines information such as shipping routes, ship sizes, temperatures and biogeography to come up with local forecasts of invasion probabilities."

The final tally reveals the hotspots of bioinvasion. Large Asian ports such as Singapore and Hong Kong but also US ports like New York and Long Beach are among the sites of highest invasion probability. These waterways are notoriously busy, but, traffic is not the only important factor.

The North Sea, for example, does not rank among the top endangered regions despite intense shipping. Temperatures here are lower, making it more difficult for alien species to survive. However, arrivals from the other side of the Atlantic pose a serious threat to the North Sea. Most invaders are predicted to originate from the North American east coast.

Hanno Seebens from the University of Oldenburg said: "We also compared our model results to field data. And, indeed, most of the alien species actually do originate from there."

As severe as the risk of future invasions may be, the study also contains a hopeful message. If ship engineers could prevent at least some potential invaders from getting on board, the total invasion risk could be substantially mitigated.

By successfully removing a species from 25 per cent of the ballast tanks arriving at each port (eg with filters, chemicals or radiation), the overall invasion probability decreases by 56 per cent. The reduction is so disproportionately large because the effect of ballast water treatment multiplies at successive stopovers.

Bioinvasion is, as the researchers admit, a complex process, and records of past invasions are far from comprehensive. Facing these uncertainties, they simulated various different scenarios. Interestingly, the key results are comparable for different models, predicting the same hotspots and global highways of bioinvasion. The traffic on the main shipping routes plays the greatest role for the calculation.

Dr Michael Gastner, Lecturer in Engineering Mathematics at the University of Bristol, added: "Ship movements in the past few years are well documented, but there are many unknowns about future trade routes."

For example, the future of the world economy remains uncertain, and Arctic passages may become navigable as a consequence of global warming. Future simulations will also have to take into account which engineering solutions for ballast water treatment will eventually be adopted by port authorities.

###

University of Bristol: http://www.bristol.ac.uk

Thanks to University of Bristol for this article.

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Source: http://www.labspaces.net/128135/Researchers_calculate_the_global_highways_of_invasive_marine_species

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Amid budget cutbacks, U.S. shipping sector seeks more federal funds

By Andy Sullivan

WASHINGTON (Reuters) - As Congress imposes deep spending cuts on everything from national defense to child care, shipping industry executives are urging lawmakers to spend hundreds of millions of dollars more on a river network that accounts for a declining share of the nation's domestic freight.

During a lobbying blitz in the past month, roughly 130 tugboat and barge operators fanned across Capitol Hill, meeting with lawmakers and congressional staffers.

The shipping executives argued that the U.S. government should spend $150 million more each year to upgrade the Depression-era locks and dams that enable them to ship soybeans, coal and other commodities down the nation's major rivers. In return, the shippers said, they would pay more in fuel taxes.

For an industry that already is subsidized heavily by the U.S. government - and whose growth in moving domestic freight is being outpaced by rail and interstate trucking - pushing such an argument at a time of budget cutbacks is navigating upstream.

But barge operators have cultivated a bipartisan group of river-state lawmakers, including Republican Senator Lamar Alexander of Tennessee and Democratic Senator Bob Casey of Pennsylvania, who appear ready to fight for the industry's interests when the Senate takes up the issue next week.

The "Battle of the Barges" may not command the public's attention the way that the debates over gun control and immigration have. But the outcome could signal whether the traditional way of doing business on Capitol Hill - coalition-building, campaign donations and face-to-face lobbying - can still get results in an era when partisan conflicts have made it hard to advance legislation of nearly all types.

Barge executives leading the lobbying effort include Peter Stephaich of Campbell Transportation Co in Pennsylvania.

"It does seem to be unusual these days to have both sides come together and support something like this," Stephaich said last month, as he wrapped up a meeting with Alaska Democratic Senator Mark Begich and headed to a fundraiser for Republican Representative Bill Shuster of Pennsylvania.

Begich and Shuster have not announced their positions on the shipping industry's call for more government funding.

Opposition to the industry's push hasn't become public in the Senate, but that is likely to change soon. Taxpayer watchdogs and environmental groups see the industry's current subsidies as overly generous, and vow to fight any increase.

"The idea of expanding a subsidy to the most subsidized form of transportation this side of space travel is not going to happen," said Steve Ellis of Taxpayers for Common Sense. "It's really beyond the pale."

Conservative groups such as the Club for Growth also are signaling they could join the shipping industry's opponents - a move that would get the attention of Republicans wary of facing a challenge from the right when they run for re-election.

The shipping industry has a long history of support in Congress, dating to the early days of the country when rivers were the most reliable form of cargo transportation.

In recent decades, freight rail and interstate trucking have eclipsed the shipping industry. In 1980, 27 percent of domestic freight moved by water; by 2009 that figure had dropped to 11 percent, according to the U.S. Department of Transportation.

Waterborne transportation still plays a key role in moving grain, coal and other bulk commodities from the nation's interior states down the Mississippi River to Louisiana, where they are sent around the world.

Through a fuel tax, the industry pays about 10 percent of the $800 million or so spent each year to keep the nation's rivers open for navigation. The government covers the rest.

By contrast, a fuel tax on car and truck drivers covers about 80 percent of the cost of maintaining the nation's highway system. Freight rail operators cover all of their costs.

The barge fuel tax is supposed to cover half the costs of new construction, but it has not increased since 1994 and does not generate enough revenue to build new locks and dams in a timely manner. At the current pace, some planned projects won't be completed for 77 years, according to an industry trade group.

Industry officials also say they need more help to repair existing structures - a problem they say was vividly illustrated in 2011, when a 280-foot section of canal south of Chicago collapsed, disrupting commercial traffic.

A WORTHY INVESTMENT?

Some analysts question whether a massive new spending push would yield the benefits that the shipping industry claims.

Decaying locks and dams can contribute to delays in shipping, but the system's reliability is affected much more by droughts, floods and other weather events that largely are beyond human control, said Don Sweeney, a transportation specialist at the University of Missouri-St. Louis.

"Are these expenditures likely to yield the kind of economic benefits that would make them good expenditures?" he asked. "I'm not convinced at all."

The shipping industry's proposal would boost its contribution by 30 to 45 percent, to about $110 million a year. In return, the government would more than double its annual contribution to $270 million, on top of the $500 million to $600 million it spends each year on dredging and other waterway maintenance. The government would pay for any cost overruns.

The industry aims to insert the proposal into a broad water-resources bill that the Senate will take up next week.

To push the plan, the Waterways Council, an industry trade group, boosted its spending on lobbyists to $315,000 in the first three months of this year, much more than past year.

The industry's lobbyists include John Breaux, a former Democratic senator from Louisiana, and Bob Livingston, a former Louisiana Republican who oversaw spending issues as chairman of the House Appropriations Committee during the 1990s.

SUPPORT FROM RIVER STATES

The shipping industry's backing in Congress dates to at least 1848, when Congressman Abraham Lincoln fought President James Polk's push to make the industry pay its own way.

More recently, Congress turned back efforts by presidents Bill Clinton, George W. Bush and Barack Obama to get users to pick up a greater share of their costs.

Republican lawmakers often are skeptical about increasing domestic spending, but those from states with significant river traffic have joined Democrats in expanding funds for the U.S. Army Corps of Engineers, which maintains commercial waterways.

That pattern is apparent in the Democrat-led Senate, where Alexander and Casey back the industry's plan.

In the Republican-led House, a similar bill is supported by Democratic and Republican lawmakers from states such as Alabama and Illinois that see a large amount of barge traffic. The bill's lead sponsor, Ed Whitfield of Kentucky, represents a district that borders the Ohio and Mississippi rivers.

While outside groups like Club for Growth use the threat of a primary challenge to wield influence over lawmakers, the shipping industry has taken the opposite approach. Industry employees donated $28,000 to Whitfield last year.

This year, the industry has sent donations to other lawmakers who could prove influential in the debate - including Shuster, who will draft his own water-resources bill as head of the House Transportation and Infrastructure Committee.

American Waterways Operators, an industry trade group, gave $2,500 to Shuster in February and hosted a fundraising dinner in April. The amount raised is not yet public.

A Shuster spokesman said the congressman had not decided whether to back the shipping industry's plan. Stephaich, the industry executive, sounded confident of Shuster's support.

"We've got a desire, a will on both Congressman Shuster's side and in the Senate, with the help of Senator Casey, to hopefully have all of this come together," Stephaich said.

(Editing by David Lindsey and Lisa Shumaker)

Source: http://news.yahoo.com/amid-budget-cutbacks-u-shipping-sector-seeks-more-050558595.html

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Talladega Crash: Kyle Busch, Kasey Kahne Trigger 16-Car Wreck In Aaron's 499 (VIDEO/PHOTOS)

Jeff Burton, Brian Vickers, David Reutimann, Kevin Harvick, Martin Truex Jr

Drivers crash in a multi-car pileup in Turn 2 during the NASCAR Sprint Cup Series Aaron's 499 auto race at Talladega Superspeedway in Talladega, Ala., Sunday, May 5, 2013. From left to right, are: Jeff Burton (31), Brian Vickers (11), David Reutimann (83), Kevin Harvick (29), Martin Truex Jr., (56) and David Stremme (30). (AP Photo/Skip Williams)

Casey Mears, Kasey Kahne, Kyle Busch, Greg Biffle

Cars crash in Turn 1 during the NASCAR Sprint Cup Series Aaron's 499 auto race at Talladega Superspeedway in Talladega, Ala., Sunday, May 5, 2013. Casey Mears (1) and Kasey Kahne (5) crash into Kyle Busch (18) and Greg Biffle, top left, spins as other drivers try and escape damage in the accident. (AP Photo/Skip Williams)

Danica Patrick

Danica Patrick gets service during the NASCAR Sprint Cup Aaron's 499 auto race at Talladega Superspeedway in Talladega, Ala., Sunday, May 5, 2013. (AP Photo/Rainier Ehrhardt)

Casey Mears, Kasey Kahne, Kyle Busch, Kevin Harvick, David Stremme

Race fans watch as cars crash in Turn 1 during the NASCAR Sprint Cup Series Aaron's 499 auto race at Talladega Superspeedway in Talladega, Ala., Sunday, May 5, 2013. Casey Mears (1) and Kasey Kahne (5) crash into Kyle Busch (18) as Kevin Harvick (29) and David Stremme (30) try to avoid the accident. (AP Photo/Skip Williams)

Matt Kenseth

NASCAR Sprint Cup Series driver Matt Kenseth gets service during the Aaron's 499 auto race at Talladega Superspeedway in Talladega, Ala., Sunday, May 5, 2013. (AP Photo/Rainier Ehrhardt)

Brian Vickers

NASCAR Sprint Cup Series driver Brian Vickers talks with pit crew members as he waits to take over the driving duties for Denny Hamlin during the NASCAR Sprint Cup Series Aaron's 499 auto race at Talladega Superspeedway in Talladega, Ala., Sunday, May 5, 2013. Hamlin was replaced by Vickers at the first caution lap. (AP Photo/Jay Sailors)

Denny Hamlin

NASCAR Sprint Cup Series driver Denny Hamlin, left, talks with pit crew members after he was relieved by driver Brian Vickers on the first caution during the NASCAR Sprint Cup Series Aaron's 499 auto race at Talladega Superspeedway in Talladega, Ala., Sunday, May 5, 2013. (AP Photo/Jay Sailors)

Chipper Jones, Michael Waltrip

NASCAR Sprint Cup driver Michael Waltrip, left, does an interview on pit road with former Atlanta Braves baseball player Chipper Jones prior to the start of the NASCAR Sprint Cup Series auto race at Talladega Superspeedway in Talladega, Ala., Sunday, May 5, 2013. Jones was the honorary starter for the Aaron's 499 race. (AP Photo/Rainier Ehrhardt)

Joey Logano

Joey Logano gets service during the NASCAR Sprint Cup Series Aaron's 499 auto race at Talladega Superspeedway in Talladega, Ala., Sunday, May 5, 2013. (AP Photo/Rainier Ehrhardt)

Katherine Webb

Model Katherine Webb watches the action on pit road prior to the start of the NASCAR Sprint Cup Series Aaron's 499 auto race at Talladega Superspeedway in Talladega, Ala., Sunday, May 5, 2013. Webb was attending the race with friend Alabama quarterback AJ McCarron who was the honorary pace car driver. (AP Photo/Rainier Ehrhardt)

Katherine Webb

Model Katherine Webb signs autographs on pit road prior to the start of the NASCAR Sprint Cup Series Aaron's 499 auto race at Talladega Superspeedway in Talladega, Ala., Sunday, May 5, 2013. Webb was attending the race with friend Alabama quarterback AJ McCarron who was the honorary pace car driver. (AP Photo/Rainier Ehrhardt)

NASCAR Sprint Cup Series drivers race through the tri-oval under threatening skies during the Aaron's 499 auto race at Talladega Superspeedway in Talladega, Ala., Sunday, May 5, 2013. (AP Photo/Rainier Ehrhardt)

AJ McCarron, Michael Waltrip

NASCAR Sprint Cup driver Michael Waltrip, right, does an interview on pit road with Alabama quarterback AJ McCarron prior to the start of the NASCAR Sprint Cup Series auto race at Talladega Superspeedway in Talladega, Ala., Sunday, May 5, 2013. McCarron was the honorary pace car driver for the Aaron's 499 race. (AP Photo/Rainier Ehrhardt)

Michael Waltrip, AJ McCarron

Michael Waltrip, right, presents Alabama quarterback AJ McCarron with a jersey with his car No. 55 on it before the NASCAR Sprint Cup Series auto race at Talladega Superspeedway in Talladega, Ala., Sunday, May 5, 2013. (AP Photo/Rainier Ehrhardt)

Carl Edwards

NASCAR Sprint Cup Series driver Carl Edwards (99) leads a pack of cars through the tri-oval at the start of the NASCAR Sprint Cup Series auto race at Talladega Superspeedway in Talladega, Ala., Sunday, May 5, 2013. (AP Photo/Rainier Ehrhardt)

AJ McCarron

Alabama quarterback AJ McCarron settles into the pace car during the NASCAR Sprint Cup Series auto race at Talladega Superspeedway in Talladega, Ala., Sunday, May 5, 2013. McCarron was the honorary pace car driver for the Aaron's 499 race. (AP Photo/Rainier Ehrhardt)

Aaron's 499

TALLADEGA, AL - MAY 05: Carl Edwards, driver of the #99 Fastenal Ford and Martin Truex Jr., driver of the #56 NAPA Auto Parts Toyota, leads the field at the start of the NASCAR Sprint Cup Series Aaron's 499 at Talladega Superspeedway on May 5, 2013 in Talladega, Alabama. (Photo by Sean Gardner/Getty Images)

Danica Patrick

NASCAR Sprint Cup Series driver Danica Patrick greets fans after being introduced during driver's introductions prior to the NASCAR Sprint Cup Series auto race at Talladega Superspeedway in Talladega, Ala., Sunday, May 5, 2013. (AP Photo/Dan Lighton)

Aaron's 499

TALLADEGA, AL - MAY 05: A detail of the helmet worn by Michael Waltrip, driver of the #55 Aaron's Dream Machine / Alabama National Championship Toyota, is seen on top of Waltrip's car on the grid during the NASCAR Sprint Cup Series Aaron's 499 at Talladega Superspeedway on May 5, 2013 in Talladega, Alabama. (Photo by Tom Pennington/Getty Images)

Aaron's 499

TALLADEGA, AL - MAY 05: Carl Edwards, driver of the #99 Fastenal Ford and Martin Truex Jr., driver of the #56 NAPA Auto Parts Toyota, leads the field at the start of the NASCAR Sprint Cup Series Aaron's 499 at Talladega Superspeedway on May 5, 2013 in Talladega, Alabama. (Photo by Sean Gardner/Getty Images)

Aaron's 499

TALLADEGA, AL - MAY 05: Matt Kenseth, driver of the #20 Home Depot / Husky Toyota, leads the field during the NASCAR Sprint Cup Series Aaron's 499 at Talladega Superspeedway on May 5, 2013 in Talladega, Alabama. (Photo by Tom Pennington/Getty Images)

Aaron's 499

TALLADEGA, AL - MAY 05: Clint Bowyer, driver of the #15 Peak Toyota, looks on from the grid prior to the start of the NASCAR Sprint Cup Series Aaron's 499 at Talladega Superspeedway on May 5, 2013 in Talladega, Alabama. (Photo by Kevin C. Cox/Getty Images)

Aaron's 499

TALLADEGA, AL - MAY 05: Clint Bowyer, driver of the #15 Peak Toyota, looks on from the grid prior to the start of the NASCAR Sprint Cup Series Aaron's 499 at Talladega Superspeedway on May 5, 2013 in Talladega, Alabama. (Photo by Kevin C. Cox/Getty Images)

Aaron's 499

TALLADEGA, AL - MAY 05: Clint Bowyer, driver of the #15 Peak Toyota, looks on from the grid prior to the start of the NASCAR Sprint Cup Series Aaron's 499 at Talladega Superspeedway on May 5, 2013 in Talladega, Alabama. (Photo by Kevin C. Cox/Getty Images)

Aaron's 499

TALLADEGA, AL - MAY 05: (L-R) University of Alabama quarterback AJ McCarron and Dale Earnhardt Jr., driver of the #88 National Guard Chevrolet, pose for a photo on the grid prior to the start of the NASCAR Sprint Cup Series Aaron's 499 at Talladega Superspeedway on May 5, 2013 in Talladega, Alabama. (Photo by Tom Pennington/Getty Images)

Aaron's 499

TALLADEGA, AL - MAY 05: Carl Edwards, driver of the #99 Fastenal Ford, looks on from the grid during the NASCAR Sprint Cup Series Aaron's 499 at Talladega Superspeedway on May 5, 2013 in Talladega, Alabama. (Photo by Sean Gardner/Getty Images)

Aaron's 499

TALLADEGA, AL - MAY 05: Joey Logano, driver of the #22 Shell Pennzoil Ford, looks on from the grid during the NASCAR Sprint Cup Series Aaron's 499 at Talladega Superspeedway on May 5, 2013 in Talladega, Alabama. (Photo by Sean Gardner/Getty Images)

Aaron's 499

TALLADEGA, AL - MAY 05: Martin Truex Jr., driver of the #56 NAPA Auto Parts Toyota, looks on from the grid during the NASCAR Sprint Cup Series Aaron's 499 at Talladega Superspeedway on May 5, 2013 in Talladega, Alabama. (Photo by Sean Gardner/Getty Images)

Aaron's 499

TALLADEGA, AL - MAY 05: Crew members for the #18 M&M's Toyota driven by Kyle Busch (not pictured) work on the #18 car after it was involved in a wrechk on track , during the NASCAR Sprint Cup Series Aaron's 499 at Talladega Superspeedway on May 5, 2013 in Talladega, Alabama. (Photo by Sean Gardner/Getty Images)

Aaron's 499

TALLADEGA, AL - MAY 05: Denny Hamlin, driver of the #11 FedEx Express Toyota, stands in his pit box after he was replaced in his car by Brian Vickers during the NASCAR Sprint Cup Series Aaron's 499 at Talladega Superspeedway on May 5, 2013 in Talladega, Alabama. (Photo by Sean Gardner/Getty Images)

Aaron's 499

TALLADEGA, AL - MAY 05: (L-R) David Stremme, driver of the #30 Lean 1 Toyota, Kyle Busch, driver of the #18 M&M's Toyota, Jamie McMurray, driver of the #1 McDonald's Chevrolet, Martin Truex Jr., driver of the #56 NAPA Auto Parts Toyota, Kasey Kahne, driver of the #5 Time Warner Cable Chevrolet and David Stremme, driver of the #30 Lean 1 Toyota are involved in a wreck during the NASCAR Sprint Cup Series Aaron's 499 at Talladega Superspeedway on May 5, 2013 in Talladega, Alabama. (Photo by Jared Wickerham/Getty Images)

Aaron's 499

TALLADEGA, AL - MAY 05: Crew members for the #18 M&M's Toyota driven by Kyle Busch (not pictured) work on the #18 car after it was involved in a wrechk on track , during the NASCAR Sprint Cup Series Aaron's 499 at Talladega Superspeedway on May 5, 2013 in Talladega, Alabama. (Photo by Sean Gardner/Getty Images)

Aaron's 499

TALLADEGA, AL - MAY 05: Scott Speed, driver of the #95 Jordan Truck Sales / TrackingPoint Ford leads Ricky Stenhouse Jr., driver of the #17 Best Buy Ford and David Ragan, driver of the #34 Farm Rich Ford, during the NASCAR Sprint Cup Series Aaron's 499 at Talladega Superspeedway on May 5, 2013 in Talladega, Alabama. (Photo by Tom Pennington/Getty Images)

Aaron's 499

TALLADEGA, AL - MAY 05: (L-R) Greg Biffle, driver of the #16 3M Safety Ford, Kasey Kahne, driver of the #5 Time Warner Cable Chevrolet, Kyle Busch, driver of the #18 M&M's Toyota and Casey Mears, driver of the #13 GEICO Ford, are involved in a wreck during the NASCAR Sprint Cup Series Aaron's 499 at Talladega Superspeedway on May 5, 2013 in Talladega, Alabama. (Photo by Patrick Smith/Getty Images)

Aaron's 499

TALLADEGA, AL - MAY 05: Cars are involved in a wreck when Kyle Busch, driver of the #18 M&M's Toyota, drove into Kasey Kahne, driver of the #5 Time Warner Cable Chevrolet, during the NASCAR Sprint Cup Series Aaron's 499 at Talladega Superspeedway on May 5, 2013 in Talladega, Alabama. (Photo by Patrick Smith/Getty Images)

Aaron's 499

TALLADEGA, AL - MAY 05: Cars including Greg Biffle, driver of the #16 3M Safety Ford, David Stremme, driver of the #30 Lean 1 Toyota, Kyle Busch, driver of the #18 M&M's Toyota, Jamie McMurray, driver of the #1 McDonald's Chevrolet, Martin Truex Jr., driver of the #56 NAPA Auto Parts Toyota, Kasey Kahne, driver of the #5 Time Warner Cable Chevrolet and David Stremme, driver of the #30 Lean 1 Toyota are involved in a wreck during the NASCAR Sprint Cup Series Aaron's 499 at Talladega Superspeedway on May 5, 2013 in Talladega, Alabama. (Photo by Jared Wickerham/Getty Images)

Source: http://www.huffingtonpost.com/2013/05/05/talladega-crash-busch-kahne-nascar_n_3219855.html

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Senators pound Canadiens 6-1, take 2-1 series lead

OTTAWA (AP) ? After getting his first NHL hat trick, Jean-Gabriel Pageau was left with a bloody smile after the Senators' Game 3 victory over the Montreal Canadiens on Sunday night.

The 20-year-old rookie lost a tooth in a fight-filled, emotional 6-1 win.

The teams combined for 236 penalty minutes and nine players were given a game misconduct.

The Senators have a 2-1 lead in the best-of-seven series and Game 4 is Tuesday night in Ottawa.

Pageau, with his first career playoff goal, gave the Senators a 2-1 lead early in the second as he slipped between defensemen P.K. Subban and Andrei Markov to beat Carey Price over the shoulder.

Pageau is not likely to forget the goal as he was hit in the mouth by Subban on the goal and lost a tooth. Players could be seen looking for the tooth on the ensuing goal celebration.

"I might put it under my pillow and see what happens," Pageau kidded.

The crowd at Scotiabank Place chanted Pageau's name and the Ottawa native says he's hopeful to give them the opportunity to do it again.

"It was good motivation and forced me to push myself to keep going," Pageau said. "They liked my game and I didn't want to disappoint them after that."

The third period started with the Senators leading 2-1.

But after Pageau's second goal of the game and a Kyle Turris score made it 4-1, emotions overflowed and a line brawl broke out at center ice.

Turris' goal, his first of the series, at 7:00 put the game out of reach. On the ensuing faceoff, five different fights broke out.

"I thought we handled ourselves well under the circumstances and the duress we were put under and we defended ourselves," Ottawa coach Paul MacLean said.

The Senators ended up with the man advantage after the brawl and Jakob Silfverberg scored on the power play as he beat Price up high to make it 5-1 only 8 seconds after Turris' goal.

More penalties were taken, and at one point, Ottawa was left with just five players on the bench, while Montreal had six.

Ottawa's veteran forward Daniel Alfredsson finished the game playing defense.

After the game, Montreal coach Michel Therien took exception with MacLean calling a timeout with 17 seconds remaining.

In Therien's opinion MacLean was trying to embarrass and humiliate the Canadiens.

"As far as I'm concerned that was classless," Therien said.

With so few players on his bench and things already out of hand, MacLean felt he had no other option than to call a timeout to get his message to his players.

"I didn't want anyone to get hurt, it was already getting dumb enough as it was," MacLean said. "I have two important players on my team and I still have games to play. We're not giving them a freebie. There's already enough of that."

MacLean went on to say that he was protecting his players and he would do it again.

This is the second time Therien has taken issue with MacLean.

"I don't like when a coach is making comments," Therien said. "I don't like a coach when trying to humiliate our team. I don't like that."

MacLean wasn't impressed by the actions of the Canadiens and is hopeful the league will review certain aspects of the game, including Josh Gorges shooting the puck at Turris at the end of the game.

Pageau completed the hat trick, becoming just the second player in Senators history to get a hat trick in the playoffs with less than two minutes remaining. Alfredsson also did it in 1998.

Less than a month ago, Pageau was playing in the AHL. But his strong play has earned him the confidence of MacLean.

"It was a great night for the kid," MacLean said. "He's come in and played very, very well for us. We're really pleased for him, he's been a good player."

"He played a great game," Alfredsson said. "He had some great shots, picked the corners and it was fun for him."

Alfredsson scored Ottawa's opening goal and Craig Anderson stopped 33 shots.

Price faced 30 shots. Rene Bourque scored for the Canadiens at 14:34 of the first.

Captain Brian Gionta and Max Pacioretty, who both missed Game 2, were back in the lineup for the Canadiens.

The Canadiens had a couple of great chances to tie the game in the second, but came up short.

Alex Galchenyuk was stopped by Anderson as he came racing in alone. And then with Montreal on the power play, Tomas Plekanec rang a shot off the crossbar.

The Canadiens weren't pleased with their overall effort and know they need a better game plan looking ahead to Game 4 on Tuesday.

"Our problem was we tried to make plays that weren't there," Gorges said. "We weren't in our structure, we weren't in our system and when we're not we're chaotic.

"We knew they were going to come hard, we just didn't play a good fundamental game."

A physical first period ended with the teams tied 1-1.

The Senators made the most of a 28-second two-man advantage as Alfredsson picked up his rebound at his feet and quickly rifled it past the right of Price. It was the Senators' first power-play goal of the series.

Montreal tied the game with a power-play goal as Plekanec found Bourque to create a 2-on-1 break.

Bourque's shot changed speed and seemed to throw off Anderson and he was unable to get over in time and he could only watch as the puck trickle across the goal line.

Notes: The Senators are without C Jason Spezza (back, indefinitely). D Eric Gryba served the second and final game of his suspension for his hit on Lars Eller in Game 1. Guillaume Latendresse and Andre Benoit were healthy scratches for the Senators in favor of Cory Conacher and Patrick Wiercioch. With Pacioretty and Gionta back in the lineup, Jeff Halpern and Gabriel Dumont were scratched for the Canadiens.

Source: http://news.yahoo.com/senators-pound-canadiens-6-1-2-1-series-022923024.html

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Smile for the Camera!: How to Succeed in Video Interviews - Simply ...

Video interviewing is becoming much more common in the job search, so you?ll want to be prepared ? instead of surprised ? by the request.

For a successful video interview, take the time to practice and consider the image you want to present. Think of it as the next step forward in your job search and you?ll be on the right track.

Web-based video interviews save time and money for you and the company by providing an economical solution to managing face-to-face contact with solid candidates from around the world. ?Willing to relocate? takes on a different slant when you can make personal contact from wherever you are currently located.

Even though the format of the interview may be electronic, the questions and interactions still resemble traditional interviews. One important point to remember when preparing for the video interview is that hiring managers will have this ?virtual? version of you on hand to replay and compare to other candidates at will. This critical distinction requires that you attend to all the details before stepping onto the mini-stage of your video interview.

Arrange a practice video interview with a friend or family member before your scheduled time with the hiring manager. Review the practice video and keep practicing until you are comfortable and can easily launch into your value points in response to almost any questions posed to you.

Follow these tips for a great interview:?

Familiarize yourself with the video interview process before an interview is scheduled. By making video interview preparation a routine part of your job search, you won?t be caught off guard when asked to conduct one. Practice using a webcam, Skype, and video phone recordings, and you will be much more confident when you reach the real-time interview. Although the company may provide you with software via a web portal or a webcam and brief instructions on its use, you don?t want to be so focused on the technical details and mechanics of how to use the equipment that you are distracted from presenting yourself at your best. Some programs feature a small screen picture of yourself which provides you with instant feedback about your interview performance.

Most companies will have a consistent set of questions they use in each video interview, typically 10 to 15. Each question may be asked in real time or provided to you with a set amount of time to read the question and respond. This is where your preparation pays off. An interview always requires that you can think on your feet, but if you are distracted by thoughts of whether the equipment is working, it will show in your interview behavior, making you appear less confident.?

• Be certain to dress just as if you were interviewing in person, even if you are really in your own living room. Select a location that presents a professional image. Don?t sit in front of a cluttered corner of your office or leave television or radio running in the background.

• Make sure that family members and pets are not strolling in and out of the frame or making distracting sounds. If you have a copy of your resume, notes, or a pen, try to avoid shuffling papers and objects during the interview. These noises will interfere with the sound quality and may make you appear nervous. If you invest time in practicing your responses, you are unlikely to need these props.

• Choose appropriate lighting, so that it is not too bright or too dim for the interviewer to clearly see your face and your expressions. Remember to look directly into the camera. Imagine the camera as the face of the interviewer so that you appear to be having a conversation with the person.

• The interview may also be scheduled at a professional video conferencing business. In that case, the environment may be less familiar, which can help you feel as though you are going to a traditional interview. Another benefit of this scenario is that professionals are responsible for the video equipment. However, visiting the location prior to the day of the video interview can increase your level of comfort and familiarity with the equipment and help you feel more confident.

• Another format commonly used is for you to submit your own video of yourself answering the interview questions provided by the hiring manager. This type of interview can be more challenging because you don?t interact with the hiring manager or have the opportunity to use feedback to adjust your interview behavior. Because of those differences, this type of video may require more practice on your part to appear natural because you will be answering questions on your own. Again, enlist friends and family to help you present a comfortable and confident professional image.

• Remember that your advance preparation could be even more crucial for a video interview because of the fact that your responses can be replayed and compared to those of other candidates side-by-side. The more you can minimize awkward silences, ?ums,? and verbal fumbles, the stronger your video will be, helping you to move ahead of other candidates.

• Don?t forget to ask questions in the video interview, just as you would in a face-to-face interaction. And if you wonder how the process is going, it is fine to ask the interviewer for feedback. You can always frame this question by asking if they can see and hear you well.

Ultimately, an interview is an interview. Don?t become distracted or preoccupied with the technical details. Just focus on your value to the employer and the strengths you have that will meet their needs. Become a video star and let the hiring manager see you shine!

GetInterviews.com offers a free resume critique and their services come with a wonderful guarantee -- interviews in 30 days or they'll rewrite for free! They are the country?s leading resume writing firm and provide customized, branded resumes and job search documents. The staff?s credentials include being cited by JIST Publications as one of the "best resume writers in North America," quoted as a career expert in The Wall Street Journal, and published in a whopping 50+ career books. Established in 1994, the firm has aided more than 175,000 job seekers to date. All resume writers are Certified Professional Resume Writers.

Source: http://blog.simplyhired.com/2013/05/smile-for-the-camera-how-to-succeed-in-video-interviews.html

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U.S. Navy moves ahead on new presidential helicopter program

By Andrea Shalal-Esa

WASHINGTON (Reuters) - The U.S. Navy posted the final rules for a long-delayed, multibillion dollar competition for a new fleet of presidential helicopters, saying it planned to award a contract about a year from now despite looming U.S. defense budget cuts.

"We're moving forward as we planned all along," said Kelly Burdick, spokeswoman for the Navy office that is overseeing the competition, one of the few for new military helicopters in coming years.

Burdick said the Navy's latest effort to buy new presidential helicopters was carefully structured to be affordable given mounting pressures on U.S. military budgets. She said it was not immediately clear if the program would be affected by across-the-board budget cuts that took effect on March 1. "What will be, will be," she said.

The Navy posted the final request for proposals for a new Marine One helicopter on Friday, setting an August 1 deadline for proposals to be submitted and saying it planned to pick a winning bidder in the third quarter of fiscal year 2014.

The Navy's last attempt to buy a new presidential helicopter ended in 2009, when then-Defense Secretary Robert Gates canceled a program run by Lockheed Martin Corp after numerous requirement changes threatened to double the cost of the program to more than $13 billion.

The Navy's posting on Friday called for construction of six developmental helicopters during the engineering design phase, followed by nine helicopters during a low-rate production phase and up to eight more in the following years.

This time, Lockheed Martin is paired with Sikorsky Aircraft, a unit of United Technologies Corp, offering Sikorsky's S-92 helicopter.

Lockheed's partner on the previous program, Finmeccanica SpA unit AgustaWestland, has teamed up with Northrop Grumman Corp, to submit a possible bid based on the AgustaWestland 101 helicopter.

Boeing Co has said it is also studying a possible bid based on its H-47 Chinook helicopter or the V-22 Osprey tilt-rotor aircraft that it builds with Textron Inc's Bell Helicopter unit.

The current presidential helicopters are VH-60N "Night Hawks" and VH-3D "Sea Kings," both built by Sikorsky. The fleet is operated by the Marine Corps, but the acquisition program is overseen by the Navy.

The Navy included $1.85 billion for the program in its budget request for fiscal 2013 through 2017, with funding to increase from $61.2 million the first year to $687.7 million in fiscal 2017.

Congressional aides said the Navy's plan to slowly ramp up funding for the program could ensure its survival, even if some additional cuts are imposed on the Pentagon as part of a compromise to avoid the full brunt of the cuts now planned.

(Reporting by Andrea Shalal-Esa; Editing by Phil Berlowitz)

Source: http://news.yahoo.com/u-navy-moves-ahead-presidential-helicopter-program-183652898.html

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Barnes & Noble intros buy-one-get-one Nook book offer, only valid in stores

Well, this process seems a bit counterintuitive, eh? This morning, Barnes & Noble introduced a new scheme for getting Nook customers to visit the company's retail stores. The promotion nets you one free e-book when you purchase another, but -- and this is where the offer tripped us up a bit -- you can only make your electronic purchase with a cashier in a physical store. The deal will be up for grabs every weekend, and titles are set to change. There are currently 20 books on offer (available this Saturday and Sunday only), including hits like Along Came a Spider by James Patterson and Bossypants by Tina Fey. Once you make your selections, you'll receive an email with access codes (assuming the rep managed to input your data correctly), at which point you'll need to visit a dedicated Barnes & Noble site to receive your books. Easy peasy.

Comments

Via: ZDNet

Source: Barnes & Noble

Source: http://www.engadget.com/2013/05/02/barnes-noble-free-nook-book/?utm_medium=feed&utm_source=Feed_Classic&utm_campaign=Engadget

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New brain research shows two parents may be better than one

May 1, 2013 ? A team of researchers at the University of Calgary's Hotchkiss Brain Institute (HBI) have discovered that adult brain cell production might be determined, in part, by the early parental environment. The study suggests that dual parenting may be more beneficial than single parenting.

Scientists studied mouse pups that were raised by either dual or single parents and found that adult cell production in the brain might be triggered by early life experiences. The scientists also found that the increased adult brain cell production varied based on gender. Specifically, female pups raised by two parents had enhanced white matter production as adults, increasing motor coordination and sociability. Male pups raised by dual parents displayed more grey matter production as an adult, which improves learning and memory.

"Our new work adds to a growing body of knowledge, which indicates that early, supportive experiences have long lasting, positive impact on adult brain function," says Samuel Weiss, PhD, senior author of the study and director of the HBI.

Surprisingly, the advantages of dual parenting were also passed along when these two groups reproduced, even if their offspring were raised by one female. The advantages of dual parenting were thus passed along to the next generation.

To conduct the study, scientists divided mice into three groups i) pups raised to adulthood by one female ii) pups raised to adulthood by one female and one male and iii) pups raised to adulthood by two females. Researchers then waited for the offspring to reach adulthood to find out if there was any impact on brain cell production.

Scientists say that this research provides evidence that, in the mouse model, parenting and the environment directly impact adult brain cell production. While it's not known at this point, it is possible that similar effects could be seen in other mammals, such as humans.

The study is published in the May 1 edition of PLOS ONE. It was funded by the Canadian Institutes of Health Research (CIHR).

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Story Source:

The above story is reprinted from materials provided by University of Calgary.

Note: Materials may be edited for content and length. For further information, please contact the source cited above.

---

Journal Reference:

1. Gloria K. Mak, Michael C. Antle, Richard H. Dyck, Samuel Weiss. Bi-Parental Care Contributes to Sexually Dimorphic Neural Cell Genesis in the Adult Mammalian Brain. PLoS ONE, 2013; 8 (5): e62701 DOI: 10.1371/journal.pone.0062701

Note: If no author is given, the source is cited instead.

Disclaimer: This article is not intended to provide medical advice, diagnosis or treatment. Views expressed here do not necessarily reflect those of ScienceDaily or its staff.

Source: http://feeds.sciencedaily.com/~r/sciencedaily/top_news/top_science/~3/ZFfPxb8QnNo/130501193202.htm

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Researchers find that some 'green' hot water systems fail to deliver on promises

Public release date: 2-May-2013
[ | E-mail | Share ]

Contact: Steven Mackay
smackay@vt.edu
540-231-4787
Virginia Tech

Two researchers affiliated with the Virginia Tech College of Engineering have published a paper which reports that hot water recirculating systems touted as "green," actually use both more energy and water than their standard counterparts.

Marc Edwards, the Charles P. Lunsford Professor of Civil and Environmental Engineering in the Virginia Tech College of Engineering, originated the efficiency study of the systems as part of an undergraduate design class six years ago. After a thorough analysis, the class concluded the claims as false, and that it "was thermodynamically impossible for these systems to save energy as claimed," said Edwards.

The topic was selected as part of a dissertation by Randi Brazeau during her doctorate in Virginia Tech's Charles E. Via Jr. Department of Civil and Environmental Engineering. The results are presented in a paper published in the most recent issue of Journal of Green Building.

Brazeau, now an assistant professor of environmental science at Metropolitan State University of Denver, examined the energy and water savings of continuous hot water recirculating systems in a comparative, direct test versus traditional hot water systems in which consumers often wait for the cold water to flush down the drain before the water warms to a comfortable temperature for showering.

She found that the recirculation systems used 20 percent more energy even in the best possible scenario in which the water pump was only on for a few seconds before use, and in scenarios where the pump was always on, the recirculation systems could require more than double the energy to operate. The consumer pays for this extra energy in higher electric and fuel bills.

"Randi demonstrated that when all energy costs are accounted for, including that necessary to run the pump, the hot water recirculating systems always used much more energy than the conventional systems," said Edwards.

A previous U.S. Department of Energy report and certain manufacturers claimed the recirculation devices would not only eliminate wait times, but also would save both water and energy. It also was assumed that because consumers did not need to wait for water to warm, the hot water recirculation systems would at minimum save water from being wasted. But that claim did not consider that it takes water to make energy, said Edwards.

The research found that the "so-called green" hot water recirculation systems used more net water than the conventional systems after accounting for water needed to produce the extra energy. "These are really consumer comfort and convenience devices, a luxury really, masquerading as 'green' or environmentally conscious devices," Edwards said.

Other findings: On-demand electric systems operate with nearly 100 percent energy efficiency, but cannot be used in many circumstances dependent on scaling and incoming water temperature, and may require expensive upgrades to home electrical systems and use of low or ultra-low flow showerheads.

In many cases, hot water recirculating systems touted as "green" are not just a consumer choice, but required in some new homes and businesses in the United States, said Brazeau. But their energy savings, and therefore lessened environmental impact claimed by manufacturers "do not hold water," she added.

Brazeau and Edwards calculated that a typical consumer with an electric water heater would pay as much as $158 more annually compared to systems without recirculation. More research, though, is necessary to better inform policy and decision-making by regulators, public health officials, manufacturers, and consumers, Edwards and Brazeau said.

###

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?

AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert! system.

Public release date: 2-May-2013
[ | E-mail | Share ]

Contact: Steven Mackay
smackay@vt.edu
540-231-4787
Virginia Tech

Two researchers affiliated with the Virginia Tech College of Engineering have published a paper which reports that hot water recirculating systems touted as "green," actually use both more energy and water than their standard counterparts.

Marc Edwards, the Charles P. Lunsford Professor of Civil and Environmental Engineering in the Virginia Tech College of Engineering, originated the efficiency study of the systems as part of an undergraduate design class six years ago. After a thorough analysis, the class concluded the claims as false, and that it "was thermodynamically impossible for these systems to save energy as claimed," said Edwards.

The topic was selected as part of a dissertation by Randi Brazeau during her doctorate in Virginia Tech's Charles E. Via Jr. Department of Civil and Environmental Engineering. The results are presented in a paper published in the most recent issue of Journal of Green Building.

Brazeau, now an assistant professor of environmental science at Metropolitan State University of Denver, examined the energy and water savings of continuous hot water recirculating systems in a comparative, direct test versus traditional hot water systems in which consumers often wait for the cold water to flush down the drain before the water warms to a comfortable temperature for showering.

She found that the recirculation systems used 20 percent more energy even in the best possible scenario in which the water pump was only on for a few seconds before use, and in scenarios where the pump was always on, the recirculation systems could require more than double the energy to operate. The consumer pays for this extra energy in higher electric and fuel bills.

"Randi demonstrated that when all energy costs are accounted for, including that necessary to run the pump, the hot water recirculating systems always used much more energy than the conventional systems," said Edwards.

A previous U.S. Department of Energy report and certain manufacturers claimed the recirculation devices would not only eliminate wait times, but also would save both water and energy. It also was assumed that because consumers did not need to wait for water to warm, the hot water recirculation systems would at minimum save water from being wasted. But that claim did not consider that it takes water to make energy, said Edwards.

The research found that the "so-called green" hot water recirculation systems used more net water than the conventional systems after accounting for water needed to produce the extra energy. "These are really consumer comfort and convenience devices, a luxury really, masquerading as 'green' or environmentally conscious devices," Edwards said.

Other findings: On-demand electric systems operate with nearly 100 percent energy efficiency, but cannot be used in many circumstances dependent on scaling and incoming water temperature, and may require expensive upgrades to home electrical systems and use of low or ultra-low flow showerheads.

In many cases, hot water recirculating systems touted as "green" are not just a consumer choice, but required in some new homes and businesses in the United States, said Brazeau. But their energy savings, and therefore lessened environmental impact claimed by manufacturers "do not hold water," she added.

Brazeau and Edwards calculated that a typical consumer with an electric water heater would pay as much as $158 more annually compared to systems without recirculation. More research, though, is necessary to better inform policy and decision-making by regulators, public health officials, manufacturers, and consumers, Edwards and Brazeau said.

###

---

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?

AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert! system.

Source: http://www.eurekalert.org/pub_releases/2013-05/vt-rft050213.php

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Shaking things up: Researchers propose new old way to purify carbon nanotubes

May 1, 2013 ? An old, somewhat pass?, trick used to purify protein samples based on their affinity for water has found new fans at the National Institute of Standards and Technology (NIST), where materials scientists are using it to divvy up solutions of carbon nanotubes, separating the metallic nanotubes from semiconductors. They say it's a fast, easy and cheap way to produce high-purity samples of carbon nanotubes for use in nanoscale electronics and many other applications.

Carbon nanotubes are formed from rolled-up sheets of carbon atoms arranged in a hexagonal pattern resembling chicken wire. One of the amazing features of nanotubes is that, depending on just how the sheet rolls up, a quality called chirality, the resulting tube can behave either like a semiconductor, with various properties, or like a metal, with electrical conductance up to 10 times better than copper. One big issue in creating commercially viable electronics based on nanotubes is being able to efficiently sort out the kind you want.

Thinking about how to do this, says NIST researcher Constantine Khripin, brought up the subject of biochemists and so-called "two-phase liquid extraction." "Biologists used this to separate proteins, even viruses," says Khripin, "It's an old technique, it was popular in the 70s, but then HPLC [high-performance liquid chromatography] replaced a lot of those techniques." People use HPLC to partition carbon nanotubes as well, he says, but it's less successful. HPLC divides things by exploiting differences in the mobility of the desired molecules as they travel small columns loaded with tiny spheres, but carbon nanotubes tend to stick to the spheres, reducing yield and eventually clogging the equipment.

The concept of liquid extraction is relatively straightforward. You make a mixture in water of two polymers that you've selected to be just slightly different in their "hydrophobicity," or tendency to mix with water. Add in your sample of stuff to be separated, stir vigorously and wait. The polymer solutions will gradually separate into two distinct portions or "phases," the lighter one on top. And they'll bring along with them those molecules in your sample that share a similar degree of hydrophobicity.

It turns out that this works pretty well with nanotubes because of differences in their electronic structure -- the semiconductor forms, for example, are more hydrophobic than the metallic forms. It's not perfect, of course, but a few sequential separations ends up with a sample where the undesired forms are essentially undetectable.

Be honest. It's not that easy. "No," agrees, Khripin, "People tried this before and it didn't work. The breakthrough was to realize that you need a very subtle difference between the two phases. The difference in hydrophobity between nanotubes is tiny, tiny, tiny." But you can engineer that with careful addition of salts and surfactants.

"This technique uses some vials and a bench-top centrifuge worth a couple hundred dollars, and it takes under a minute," observes team member Jeffrey Fagan. "The other techniques people use require an HPLC on the order of $50,000 and the yields are relatively low, or an ultracentrifuge that takes 12 to 20 hours to separate out the different metals from semiconductors, and it's tricky and cumbersome."

"The nanotube metrology project at NIST has been around for a quite a number of years," says senior team member Ming Zheng. "It has been a constant interest of ours to develop new ways to separate nanotubes, cheaper ways, that industry can use in the development of nanoelectronics and other applications. We really think we have a method here that fits all the criteria that people are looking for. It's easy, it's scalable, it's high resolution -- all the good attributes put together."

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The above story is reprinted from materials provided by National Institute of Standards and Technology (NIST).

Note: Materials may be edited for content and length. For further information, please contact the source cited above.

---

Journal Reference:

1. Constantine Y Khripin, Jeffrey A. Fagan, Ming Zheng. Spontaneous Partition of Carbon Nanotubes in Polymer-Modified Aqueous Phases. Journal of the American Chemical Society, 2013; : 130423102819007 DOI: 10.1021/ja402762e

Note: If no author is given, the source is cited instead.

Disclaimer: Views expressed in this article do not necessarily reflect those of ScienceDaily or its staff.

Source: http://feeds.sciencedaily.com/~r/sciencedaily/~3/Wv5zT60mZqw/130501145146.htm

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Comcast gains 583,000 new subscribers, while revenues reach $15.3 billion for Q1 2013

Comcast had a dramatic Q4 last year when it announced the buyout of NBCUniversal for $16.7 billion along with the purchase of New York's iconic 30 Rockefeller Plaza. Still, it's the cable TV and internet business that pays the freight, and that side of the Comcast's operations didn't it let it down in Q1 2013 thanks to a 6.7 percent bump in revenue to $10.2 billion along with 583,000 new subscribers. Other operations didn't fare as well, as revenue for NBCUniversal dropped 2.4 percent to $5.3 billion, but the overall picture was still pretty sunny, as the communications giant saw an 11.2 percent increase in operating income over last year to $3.1 billion. If you want to see a breakdown by division, check the source for more.

Filed under: Home Entertainment, Internet, HD

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Source: Comcast

Source: http://www.engadget.com/2013/05/01/comcast-Q1-2013-earnings/?utm_medium=feed&utm_source=Feed_Classic&utm_campaign=Engadget

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