Source: http://feedproxy.google.com/~r/Techcrunch/~3/bHTvzc0yZRs/
prince johan friso windows 8 logo anguilla gone with the wind checkers imbibe msg network
Source: http://feedproxy.google.com/~r/Techcrunch/~3/bHTvzc0yZRs/
prince johan friso windows 8 logo anguilla gone with the wind checkers imbibe msg network
The Specialist Sales Manager is responsible for leading, developing, and managing a team of high performing Solution Sales and Technology Specialists that work directly with Account Team Unit (ATU) Sales Teams, District Business Marketing Officer (BMO), Managed Partner team, and Enterprise Services) for achieving or exceeding all Core Infrastructure (Datacenter and Client) business plan objectives for the District.
In this role they will be expected to:
1. Provide strategic direction as relating to issues such as market place needs, revenue growth opportunities, competitive challenges, emerging technology trends and other issues impacting the Core Infrastructure business.
2. Hire qualified individuals with high potential and technical understanding to successfully sell Microsoft in the enterprise space.
3. Lead and manage a high performance team through the development and integration of individual employees into effective and knowledgeable Solution Sales and Technical Specialists who are motivated and committed to our customers and internal teams.
4. Grow and maintain a valid, healthy Core Infrastructure product pipeline for the EPG business.
5. Design and execute a technical resource allocation strategy that enables effective opportunity engagement (Architectural Design Sessions, Proof of Concepts, etc.) to drive value with velocity for the customers and Microsoft business.
6. Help grow and maintain a healthy partner ecosystem to drive sales, technology adoption, and successful deployment of Microsoft by Enterprise Customers.
7. Work directly with Customers to develop and maintain Business and Technical decision maker relationships and assist in the closing of competitive sales opportunities.
Professional Skills: The successful candidate will bring the following skills to the team:
- Leadership skills, particularly as they relate to managing strategic issues such as revenue growth, competitive challenges and technology trends.
- Executive level communication skills and the ability to mentor others.
- Business skills, per the Executive Conversation training.
- Process orientation, using the GSX, ORE, and other Microsoft methodologies.
- Sales skills, per Integrated Solution Selling and Microsoft Solution Sales Process training and methodologies.
- Continued progress in cultural shift (humility, stewardship, customer satisfaction).
- Combination of business acumen and IT infrastructure expertise (ITIL, Six Sigma) to understand how customer business issues impact their IT environments.
- Coaching direct reports in pipeline management, opportunity management, and planning.
- Facilitating/encouraging cross-team account and resource planning.
- Hiring high potential employees who align with current requirements and can grow into future requirements and roles.
Prior Experiences and Qualifications: A proven track record with people and team management in a technology sales environment with at least 7-10 years of enterprise level experience as an individual contributor and/or lead of teams with sales quotas/targets.
The ideal candidate will have passion for, and at least a 100-200 level of understanding of the related Microsoft technologies (Virtualization, Management & Monitoring, Security, DC Orchestration, etc.) and competitor with previous experience in Systems Integrator (SI) or ISV partner management, complex sales methodology (e.g., MSSP, Michael Bosworth, etc.), GSX, other Line of Business applications (e.g. SAP), or Employee Performance Management systems (e.g. ManagePoint) a plus. A Bachelor?s degree in Computer Science or Management Information Systems or equivalent experience required. Travel necessary (20-30%). Position reports to the STU Director with required residency in one of the major market areas for the District.
SMSG
SALES:EPG
MSUSJOBS
SALES:PPS
Nearest Major Market: Irvine California
Nearest Secondary Market: Los Angeles
Job Segments: Sales Management, Sales, Computer Science, ERP, Information Systems, Technology
Source: http://www.microsoft-careers.com/job/Irvine-Specialist-Sales-Manager-Job-CA-92602/2520462/
heartbreak hotel don cornelius whitney houston i will always love you breaking news whitney houston carmen whitney houston last performance cpac straw poll
Until now, Windows 8's official hardware requirements have been understandably ruthless: devices with anything less than 1,366 x 768 pixels need not apply. That policy was changed in a recent newsletter, however, to permit the creation of Windows 8 devices with a resolution of 1,024 x 768 -- likely representing a very different size and shape. Microsoft says the policy switch isn't meant to "encourage partners to regularly use a lower screen resolution", and it warns that such dimensions will be incompatible with Windows 8's split-screen feature, known as "snap". Which raises the question -- why mess with the rules?
Ed Bott over at ZDNet has an interesting theory. 1,024 x 768 matches the size and aspect ratio of many popular reader-sized tablets, like the iPad Mini, which are meant to be used in both portrait and landscape orientations. There's no official confirmation either way, of course, but Bott believes Microsoft's move could be deliberately aimed at allowing the development of 7- or 8-inch Windows 8 (or RT) tablets, possibly with the close help of Nook-maker Barnes & Noble. Indeed, Mary Jo Foley spotted that Redmond and B&N have registered a new joint venture, "NewCo", that explicitly mentions the creation of a "Microsoft reader". Considering all these clues, can a Wook (WiNook?) really be that far off?
Filed under: Tablets, Software, Microsoft
Source: ZDNet, Windows Certification Newsletter
Source: http://www.engadget.com/2013/03/29/microsoft-relaxes-windows-8-resolution-rule/
henrik stenson jobs act greg mortenson jim marshall died 2013 toyota avalon the secret life of bees full moon
Mar. 28, 2013 ? Ice hockey accounts for nearly half of all traumatic brain injuries among children and youth participating in organized sports who required a trip to an emergency department in Canada, according to a new study out of St. Michael's Hospital.
The results are part of a first-of-its-kind study led by Dr. Michael Cusimano that looked at causes of sports-related brain injuries in Canadian youth and also uncovered some prevention tactics that could be immediately implemented to make sports safer for kids.
"Unless we understand how children are getting hurt in sport, we can't develop ways to prevent these serious injuries from happening," said Dr. Cusimano, a neurosurgeon and the lead author of the study. "One would think that we know the reasons why kids are having brain injuries in sports, but until know, it was based mainly on anecdotes."
The study used data from The Canadian Hospitals Injury Reporting and Prevention Program to look at the almost 13,000 children and youth aged 5-19 who had a sports-related brain injury between 1990 and 2009. The results appeared in the journal PLOS ONE today.
The researchers categorized injuries by players' ages, what sport they occurred in and what mechanisms had caused them -- "struck by player," "struck by object" (such as net or post), "struck by sport implement" (such as ball or stick), "struck by playing surface" and "other."
Hockey accounted for 44.3 per cent of all injuries and almost 70 per cent of them occurred in children over 10 as a result of player-to-player contact or being hit into the boards.
Dr. Cusimano said they expected to see high numbers in hockey because it's Canada's "national sport."
"This shows that body contact is still an area where we need to make major inroads to preventing brain injuries," Dr. Cusimano said. "For example, enforcing existing rules and making more effective incentives and disincentives about checking from behind could make huge improvements."
Nineteen per cent of the youth who suffered brain injuries got them during soccer, with most in the 10 to 14 or 15 to 19 age group. In these age ranges, the most common cause of injury was being struck by another player, kicks to the head or head-on-head collisions. In the younger group, age five to nine, players were more likely to suffer a traumatic brain injury from striking a surface or a goal post than those in older groups.
"There's a really straightforward solution here," Dr. Cusimano said. "Padding the goal posts could have potentially prevented a large number of these brain injuries in young children."
The results also found that the youngest age group was at the highest risk for getting seriously injured in baseball. Most of the 15.3 per cent of injuries occurred in children under the age of 14, with 45 per cent of them in children under nine.
Ball and bat injuries were most common, with the majority of injuries caused because the players stood too close to the batter or bat and were not supervised by an adult.
"These results give us a very specific prevention message for kids under nine who play baseball: make helmets and supervision a mandatory," said Dr. Cusimano. "The younger the child, the more supervision they need when using things like bats and balls. Simple rules around not being close to the batter can be taught to children and adults."
Football and rugby accounted for 12.9 per cent 5.6 per cent of injuries respectively, and the majority of them were caused by tackling.
Basketball made up 11.6 per cent of injuries, mostly caused by player-to-player elbowing, which increased as players got older.
"There is a real opportunity for prevention here," Dr. Cusimano said. "Having educational programs, proper equipment, rules and other incentives that support a culture of safety in sports should be a mandate of parents, coaches, players, sports organizations, schools, sports sponsors, and other groups like governments."
Funding for the research was provided by the Canadian Institutes of Health Research and the Ontario Neurotrauma Foundation.
Share this story on Facebook, Twitter, and Google:
Other social bookmarking and sharing tools:
Story Source:
The above story is reprinted from materials provided by St. Michael's Hospital, via EurekAlert!, a service of AAAS.
Note: Materials may be edited for content and length. For further information, please contact the source cited above.
Journal Reference:
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/~3/3M3mmJkKrl8/130329125301.htm
pau gasol marlins park marbury v. madison 2013 lincoln mkz burger king mary j blige google project glass google goggles
Once upon 1981, John Waters tried to engage his cult-ish fans with a scratch-and-sniff "Odorama" card to complement the film Polyester. This TV is not that -- in fact, it's a decidedly higher-tech approach to true Smell-O-Vision. Devised by a team of Japanese researchers at the Tokyo University of Agriculture and Technology and demoed in prototype form at IEEE's Virtual Reality conference, the set uses four corner-mounted fans to break the fourth wall and create an immersive olfactory experience. By merging and adjusting vapors fed through these four airflows, the team can somewhat realistically trick viewers into believing the scent is coming from localized areas of the screen. We can just hear parents of the future now: "Stop sitting so close to the screen, Johnny. You're gonna pass out from the fumes." Ah, the future...
Filed under: Home Entertainment, Science
Via: New Scientist
Source: http://feeds.engadget.com/~r/weblogsinc/engadget/~3/vP9Tk5L7ZBY/
torrey pines nhl all star game 2012 pollyanna samuel adams snowy owl one for the money 10 minute trainer
By Philip Pullella
ROME (Reuters) - Thousands of people holding candles turned out at Rome's Colosseum to see Pope Francis mark the first Good Friday of his pontificate with a traditional "Way of the Cross" procession around the ancient amphitheatre.
Francis, who was elected on March 13, sat under a red canopy on Rome's Palatine Hill as representatives of the faithful from around the world alternated carrying a wooden cross on the day Christians commemorated Jesus's death by crucifixion.
"Sometimes it may seem as though God does not react to evil, as if he is silent," the Argentine pope said, speaking slowly in Italian and in a somber voice at the end of the evening service.
"And yet, God has spoken, he has replied, and his answer is the Cross of Christ: a word which is love, mercy, forgiveness. It is also reveals a judgment, namely that God, in judging us, loves us," he said.
"Christians must respond to evil with good," he said, urging them to beware "the evil that continues to work in us and around us".
The meditations for the 14 "stations of the cross" which commemorate events in the last hours of Jesus's life - from when Pontius Pilate condemned him to death to his burial in a rock tomb - were written by young people from Lebanon.
The wooden cross was passed from one group and person to another - including a person in a wheelchair. Those who carried it came from Italy, India, China, Nigeria, Syria, Lebanon and Brazil.
Several of the meditations, read by actors, referred to conflict in the Middle East and the suffering of its people.
One meditation called the Middle East "a land lacerated by injustice and violence".
Francis praised those Lebanese Christians and Muslims who tried to live together and who, he said, in doing so gave a sign of hope to the world.
Prayers were read out for exploited and abused children, refugees, the homeless and victims of religious intolerance, war, violence, terrorism, poverty, injustice and drug addiction.
There were also prayers against abortion and euthanasia.
Good Friday is the second of four hectic days leading up to Easter Sunday, the most important day in the Christian liturgical calendar.
On Holy Thursday, two young women were among 12 people whose feet the pope washed and kissed at a traditional ceremony in a Rome youth prison, the first time a pontiff has included females in the rite.
After celebrating an Easter eve service, on Easter Sunday he will deliver his first "Urbi et Orbi" (to the city and the world) message in St. Peter's Square.
(Reporting By Philip Pullella; Editing by Michael Roddy)
Source: http://news.yahoo.com/pope-leads-traditional-good-friday-rite-rome-colosseum-220528001.html
fox sports obama speech Art Modell Frank Ocean Gay bill clinton andy roddick Costa Rica Earthquake
Hidden inside the massive federal budget that President Obama signed on Thursday is a small paragraph that has infuriated opponents of genetically-engineered crops. The provision is designed to protect those crops from court challenges. Audie Cornish talks to Dan Charles for more.
david garrard michael bay ninja turtles san antonio weather mike daisey nicollette sheridan apple dividend snow white and the huntsman
I'm all for exploring innovative ways to extend affordable access to quality higher education, especially for students who find their vocation in low-paying (if much needed) professions. But I'm really not confident that online-only degrees are they way to go.
The University of Washington will offer a new low-cost online bachelor?s degree completion program in early childhood and family studies. Pending final approval, the program will start in the fall.
[...] The Early Childhood and Family Studies degree, which is the first online-only bachelor?s completion program to be offered by the UW, will prepare individuals to work in child care, preschools, social and mental health services, parent and family support, and arts organizations.
So, um, the UW's first ever online-only bachelor's degree will be granted in program training people in a profession that consists mostly of face-to-face interpersonal interaction? I mean, if distance learning is so magical, why train preschool teachers at all? Wouldn't it be cheaper and more effective to just hand all the toddlers iPads and let them teach themselves?
The UW online degree costs $160 per credit ? which is about equivalent to $7,000 for a year of full-time study ? regardless of where students live.
No doubt that's cheaper, sure. But in every sense of the word. And it's not just the students (and their students) who might not get the value out of this that they expect. If the UW is selling a degree for $7,000 a year (and with relaxed admission requirements), won't that devalue the degrees of students paying almost twice the price? Top schools like the UW stand to cheapen their brand if they're not careful.
The program will be administered by UW Educational Outreach, which received a Next Generation Learning Challenges grant partially funded by the Gates Foundation, to help offset costs of developing the degree. The grant includes offering several core classes in early childhood education free to the public, as Massive Open Online Courses (MOOCs) on the Coursera platform.
What a great humanitarian Bill Gates is, promoting education reforms that in no way generate profits for the industry on which he built his fortune. (But then, all those libraries Andrew Carnegie built sure did use a lot of steel, so I guess I shouldn't be too cynical.)
I don't mean to come off as a Luddite. There's a place in higher education for online learning. But let's be clear: The main advantage of MOOCs is that they're cheaper. Not better, or for the most part, not even just as good. Just cheaper.
And if our public policy solution to the crisis in higher education funding is focused on making college cheaper, well, in the end, chances are we'll get what we pay for.
mike adams janoris jenkins john edwards trial brandon weeden felicia day nfl 2012 draft st louis rams
WASHINGTON (AP) ? The dawn of the age of aerial civilian drones is rich with possibilities for people far from the war zones where they made their devastating mark as a weapon of choice against terrorists.
The unmanned, generally small aircraft can steer water and pesticides to crops with precision, saving farmers money while reducing environmental risk. They can inspect distant bridges, pipelines and power lines, and find hurricane victims stranded on rooftops.
Drones ? some as tiny as a hummingbird ? promise everyday benefits as broad as the sky is wide. But the drone industry and those eager to tap its potential are running headlong into fears the peeping-eye, go-anywhere technology will be misused.
Since January, drone-related legislation has been introduced in more than 30 states, largely in response to privacy concerns. Many of the bills would prevent police from using drones for broad public surveillance or to watch individuals without sufficient grounds to believe they were involved in crimes.
Stephen Ingley, executive director of the Airborne Law Enforcement Association, says resistance to the technology is frustrating. Drones "clearly have so much potential for saving lives, and it's a darn shame we're having to go through this right now," he said.
But privacy advocates say now is the time to debate the proper use of civilian drones and set rules, before they become ubiquitous. Sentiment for curbing domestic drone use has brought the left and right together perhaps more than any other recent issue.
"The thought of government drones buzzing overhead and constantly monitoring the activities of law-abiding citizens runs contrary to the notion of what it means to live in a free society," Sen. Charles Grassley, R-Iowa, said at a recent hearing of the Senate Judiciary Committee.
With military budgets shrinking, drone makers have been counting on the civilian market to spur the industry's growth. Some companies that make drones or supply support equipment and services say the uncertainty has caused them to put U.S. expansion plans on hold, and they are looking overseas for new markets.
"Our lack of success in educating the public about unmanned aircraft is coming back to bite us," said Robert Fitzgerald, CEO of the BOSH Group of Newport News, Va., which provides support services to drone users.
"The U.S. has been at the lead of this technology a long time," he said. "If our government holds back this technology, there's the freedom to move elsewhere ... and all of a sudden these things will be flying everywhere else and competing with us."
Law enforcement is expected to be one of the bigger initial markets for civilian drones. Last month, the FBI used drones to maintain continuous surveillance of a bunker in Alabama where a 5-year-old boy was being held hostage.
In Virginia, the state General Assembly passed a bill that would place a two-year moratorium on the use of drones by state and local law enforcement. The measure is supported by groups as varied as the American Civil Liberties Union on the left and the Virginia Tea Party Patriots Federation on the right.
Gov. Bob McDonnell is proposing amendments that would retain the broad ban on spy drones but allow specific exemptions when lives are in danger, such as for search-and rescue operations. The legislature reconvenes on April 3 to consider the matter.
Seattle abandoned its drone program after community protests in February. The city's police department had purchased two drones through a federal grant without consulting the city council.
In Congress, Rep. Ed Markey, D-Mass., co-chairman of the House's privacy caucus, has introduced a bill that prohibits the Federal Aviation Administration from issuing drone licenses unless the applicant provides a statement explaining who will operate the drone, where it will be flown, what kind of data will be collected, how the data will be used, whether the information will be sold to third parties and the period for which the information will be retained.
Privacy advocates acknowledge the many benign uses of drones. In Mesa County, Colo., for example, an annual landfill survey using manned aircraft cost about $10,000. The county recently performed the same survey using a drone for about $200.
Drones can help police departments find missing people, reconstruct traffic accidents and act as lookouts for SWAT teams. Real estate agents can have them film videos of properties and surrounding neighborhoods, offering clients a better-than-bird's-eye view though one that neighbors may not wish to have shared.
"Any legislation that restricts the use of this kind of capability to serve the public is putting the public at risk," said Steve Gitlin, vice president of AeroVironment, a leading maker of smaller drones.
Yet the virtues of drones can also make them dangerous, privacy advocates say. The low cost and ease of use may encourage police and others to conduct the kind of continuous or intrusive surveillance that might otherwise be impractical.
Drones can be equipped with high-powered cameras and listening devices, and infrared cameras that can see people in the dark.
"High-rise buildings, security fences or even the walls of a building are not barriers to increasingly common drone technology," Amie Stepanovich, director of the Electronic Privacy Information Council's surveillance project, told the Senate panel.
Civilian drone use is limited to government agencies and public universities that have received a few hundred permits from the FAA. A law passed by Congress last year requires the FAA to open U.S. skies to widespread drone flights by 2015, but the agency is behind schedule and it's doubtful it will meet that deadline. Lawmakers and industry officials have complained for years about the FAA's slow progress.
The FAA estimates that within five years of gaining broader access about 7,500 civilian drones will be in use.
Although the Supreme Court has not dealt directly with drones, it has OK'd aerial surveillance without warrants in drug cases in which officers in a plane or helicopter spotted marijuana plants growing on a suspect's property.
But in a case involving the use of ground-based equipment, the court said police generally need a warrant before using a thermal imaging device to detect hot spots in a home that might indicate that marijuana plants are being grown there.
In some states economic concerns have trumped public unease. In Oklahoma, an anti-drone bill was shelved at the request of Republican Gov. Mary Fallin, who was concerned it might hinder growth of the state's drone industry. The North Dakota state Senate killed a drone bill in part because it might impede the state's chances of being selected by the Federal Aviation Administration as one of six national drone test sites, which could generate local jobs.
A bill that would have limited the ability of state and local governments to use drones died in the Washington legislature. The measure was opposed by the Boeing Co., which employs more than 80,000 workers in the state and which has a subsidiary, Insitu, that's a leading military drone manufacturer.
Sen. Rand Paul, R-Ky., recently drew attention to the domestic use of drones when he staged a Senate filibuster, demanding to know whether the president has authority to use weaponized drones to kill Americans on American soil. The White House said no, if the person isn't engaged in combat. Industry officials worry that the episode could temporarily set back civilian drone use.
"The opposition has become very loud," said Gitlin of AeroVironment, "but we are confident that over time the benefits of these solutions are going to far outweigh the concerns, and they'll become part of normal life in the future."
___
Associated Press writer Michael Felberbaum in Richmond, Va., contributed to this report.
___
Follow Joan Lowy on Twitter: http://www.twitter.com/AP_Joan_Lowy
Associated Pressadrian gonzalez Jerry Nelson Foo Canoodle Isaac path Tropical Storm Isaac path Hurricane Katrina
Paul A. Eisenstein , The Detroit Bureau ? ? ? 7 hrs.
A new lawsuit claims that nearly a decade?s worth of vehicles produced by the Ford Motor Co. suffer from a ?design defect? that can make them susceptible to suddenly and unexpectedly racing out of control.
The lawsuit, filed in West Virginia federal court on behalf of 20 different owners in 14 states, is seeking class-action status that could, if approved, come to involve the owners of millions of Ford vehicles produced between 2002 and 2010.
"For too long, Ford has put its own financial interests ahead of its consumers' safety," said lead attorney Adam Levitt. "We hope this lawsuit sheds light on this important situation and requires Ford to correct its ways, compensate its customers and put them first."
Chevy Rolls Out New 2014 Camaro
Ford is the latest in a string of manufacturers whose vehicles have been accused of experiencing so-called ?unintended acceleration,? dating back to the late 1980s when Audi?s U.S. subsidiary became embroiled in a case involving its old Audi 5000 model. In 2009 and 2010, Toyota recalled nearly 8 million vehicles due to a variety of problems including sticky accelerators and loose floor mats that could jam gas pedals wide open.
Audi ultimately was vindicated by federal regulators who largely put the blame on driver error. The automaker eventually redesigned the layout of its pedals to make it more difficult for consumers to inadvertently hit the gas instead of the brake. And Toyota is turning to so-called brake interlock systems that automatically throttle back if a motorist hits both pedals simultaneously.
In the lawsuit, attorneys insist Ford should have used a similar override as a ?failsafe.?
Subaru Plans More Hybrids, Battery Cars ? Eventually
According to the lawsuit, a 2011 report by the U.S. Department of Transportation found that Ford products racked up 22 percent of the complaints involving unintended acceleration between 2003 and 2009. Ford not only ?concealed? the defects cited in the lawsuit, but ?could have and should have? used a brake override system, the lawsuit alleges.
In response, Ford issued a statement asserting that the National Highway Traffic Safety Administration ?has investigated alleged unintended accelerations many times over many years and has concluded that driver error is the predominant cause of these events. NHTSA's work is far more scientific and trustworthy than work done by personal injury lawyers and their paid experts. In rare situations, vehicle factors, such as floor mats or broken mechanical components, can interfere with proper throttle operation, and manufacturers have addressed these rare events in field service actions."
Virtually every automaker has, at one point or another, fielded complaints related to unintended acceleration. While a few, notably including Toyota, have been forced to take actions to deal with defects that could cause cars to race out of control, NHTSA has largely echoed Ford?s contentions.
The federal agency authorized two separate studies, one by the National Academy of Sciences, the other by NASA, that essentially cleared Toyota of electronic problems ? though NASA researchers did note that it can be next to impossible to track some digital issues that may not be repeatable.
Mercedes Plugs In With B-Class Electric Drive
Nonetheless, Toyota recently reached a $1.1 billion settlement involving owners who claimed the unintended acceleration scandal resulted in lower trade-in values for their vehicles. And it has negotiated settlements involving some claims of wrongful death and injury.
Among the Ford models targeted in the new lawsuit are the 2008-2010 Taurus sedan, 2007-2010 Edge Crossover and 2004 to 2010 Explorer, as well as the 2006-2010 Lincoln MKZ luxury sedan. A number of models produced by the now-abandoned Mercury division, such as the 2005 to 2009 Grand Marquis, also are cited.
(Ford official wants EPA to come up with more accurate mileage numbers. Click here for that report.)
Copyright ? 2009-2013, The Detroit Bureau
rihanna thug life tattoo arizona governor patrick witt leprosy tampa bay buccaneers birdman whip it
Vicki Gilbert sits on stone steps in Wiltshire, England in this undated photo made available by the family on Tuesday, March 26, 2013. In 2010, Gilbert was diagnosed with breast cancer and then found she carries the mutated BRCA1 gene which may make her pre-disposed to ovarian cancer. Gilbert decided to have ovaries removed to prevent the potential onset of further cancer, and her breast cancer is in remission. A huge international effort involving more than 100 institutions and genetic tests on 200,000 people has uncovered dozens of signposts in DNA that can help reveal further a person?s risk for breast, ovarian or prostate cancer, scientists reported Wednesday, March 27, 2013. It?s the latest mega-collaboration to learn more about the intricate mechanisms that lead to cancer. (AP Photo)
Vicki Gilbert sits on stone steps in Wiltshire, England in this undated photo made available by the family on Tuesday, March 26, 2013. In 2010, Gilbert was diagnosed with breast cancer and then found she carries the mutated BRCA1 gene which may make her pre-disposed to ovarian cancer. Gilbert decided to have ovaries removed to prevent the potential onset of further cancer, and her breast cancer is in remission. A huge international effort involving more than 100 institutions and genetic tests on 200,000 people has uncovered dozens of signposts in DNA that can help reveal further a person?s risk for breast, ovarian or prostate cancer, scientists reported Wednesday, March 27, 2013. It?s the latest mega-collaboration to learn more about the intricate mechanisms that lead to cancer. (AP Photo)
This undated photo provided by the family on Tuesday, March 26, 2013 shows Vicki Gilbert in Wiltshire, England. In 2010, Gilbert was diagnosed with breast cancer and then found she carries the mutated BRCA1 gene which may make her pre-disposed to ovarian cancer. Gilbert decided to have ovaries removed to prevent the potential onset of further cancer, and her breast cancer is in remission. A huge international effort involving more than 100 institutions and genetic tests on 200,000 people has uncovered dozens of signposts in DNA that can help reveal further a person?s risk for breast, ovarian or prostate cancer, scientists reported Wednesday, March 27, 2013. It?s the latest mega-collaboration to learn more about the intricate mechanisms that lead to cancer. (AP Photo)
NEW YORK (AP) ? A huge international effort involving more than 100 institutions and genetic tests on 200,000 people has uncovered dozens of signposts in DNA that can help reveal further a person's risk for breast, ovarian or prostate cancer, scientists reported Wednesday.
It's the latest mega-collaboration to learn more about the intricate mechanisms that lead to cancer. And while the headway seems significant in many ways, the potential payoff for ordinary people is mostly this: Someday there may be genetic tests that help identify women with the most to gain from mammograms, and men who could benefit most from PSA tests and prostate biopsies.
And perhaps farther in the future these genetic clues might lead to new treatments.
"This adds another piece to the puzzle," said Harpal Kumar, chief executive of Cancer Research U.K., the charity which funded much of the research.
One analysis suggests that among men whose family history gives them roughly a 20 percent lifetime risk for prostate cancer, such genetic markers could identify those whose real risk is 60 percent.
The markers also could make a difference for women with BRCA gene mutations, which puts them at high risk for breast cancer. Researchers may be able to separate those whose lifetime risk exceeds 80 percent from women whose risk is about 20 to 50 percent. One doctor said that might mean some women would choose to monitor for cancer rather than taking the drastic step of having healthy breasts removed.
Scientists have found risk markers for the three diseases before, but the new trove doubles the known list, said one author, Douglas Easton of Cambridge University. The discoveries also reveal clues about the biological underpinnings of these cancers, which may pay off someday in better therapies, he said.
Experts not connected with the work said it was encouraging but that more research is needed to see how useful it would be for guiding patient care. One suggested that using a gene test along with PSA testing and other factors might help determine which men have enough risk of a life-threatening prostate cancer that they should get a biopsy. Many prostate cancers found early are slow-growing and won't be fatal, but there is no way to differentiate and many men have surgery they may not need.
Easton said the prospects for a genetic test are greater for prostate and breast cancer than ovarian cancer.
Breast cancer is the most common malignancy among women worldwide, with more than 1 million new cases a year. Prostate cancer is the second most common cancer in men after lung cancer, with about 900,000 new cases every year. Ovarian cancer accounts for about 4 percent of all cancers diagnosed in women, causing about 225,000 cases worldwide.
The new results were released in 13 reports in Nature Genetics, PLOS Genetics and other journals. They come from a collaboration involving more than 130 institutions in the United States, Europe, and elsewhere. The research was mainly paid for by Cancer Research U.K., the European Union and the U.S. National Institutes of Health.
Scientists used scans of DNA from more than 200,000 people to seek the markers, tiny variations in the 3 billion "letters" of the DNA code that are associated with disease risk.
The scientists found 49 new risk markers for breast cancer plus a couple of others that modify breast cancer risk from rare mutated genes, 26 for prostate cancer and eight for ovarian cancer. Individually, each marker has only a slight impact on risk estimation, too small to be useful on its own, Easton said. They would be combined and added to previously known markers to help reveal a person's risk, he said.
A genetic test could be useful in identifying people who should get mammography or PSA testing, said Hilary Burton, director of the PHG Foundation, a genomics think-tank in Cambridge, England. A mathematical analysis done by her group found that under certain assumptions, a gene test using all known markers could reduce the number of mammograms and PSA tests by around 20 percent, with only a small cost in cancer cases missed.
Among the new findings:
? For breast cancer, researchers calculated that by using all known markers, including the new ones, they could identify 5 percent of the female population with twice the average risk of disease, and 1 percent with a three-fold risk. The average lifetime risk of getting breast cancer is about 12 percent in developed countries. It's lower in the developing world where other diseases are a bigger problem.
? For prostate cancer, using all the known markers could identify 1 percent of men with nearly five times the average risk, the researchers computed. In developed countries, a man's average lifetime risk for the disease is about 14 to 16 percent, lower in developing nations.
?Markers can also make a difference in estimates of breast cancer risk for women with the BRCA1 or BRCA2 gene mutations. Such women are rare, but their lifetime risk can run as high as 85 percent. Researchers said that with the new biomarkers, it might be possible to identify the small group of these women with a risk of 28 percent or less.
For patients like Vicki Gilbert of England, who carries a variation of the BRCA1 gene, having such details about her cancer risk would have made decision-making easier.
Gilbert, 50, found out about her genetic risk after being diagnosed with the disease in 2009. Though doctors said the gene wouldn't change the kind of chemotherapy she got, they suggested removing her ovaries to avoid ovarian cancer, which is also made more likely by a mutated BRCA1.
"They didn't want to express a definite opinion on whether I should have my ovaries removed so I had to weigh up my options for myself," said Gilbert, a veterinary receptionist in Wiltshire. "...I decided to have my ovaries removed because that takes away the fear it could happen. It certainly would have been nice to have more information to know that was the right choice."
Gilbert said knowing more about the genetic risks of cancer should be reassuring for most patients. "There are so many decisions made for you when you go through cancer treatment that being able to decide something yourself is very important," she said.
Dr. Charis Eng, chair of the Genomic Medicine Institute at the Cleveland Clinic, who didn't participate in the new work, called the breast cancer research exciting but not ready for routine use.
Most women who carry a BRCA gene choose intensive surveillance with both mammograms and MRI and some choose to have their breasts removed to prevent the disease, she said. Even the lower risk described by the new research is worrisomely high, and might not persuade a woman to avoid such precautions completely, Eng said.
___
AP Medical Writer Maria Cheng contributed to this report from London.
___
Online:
Nature Genetics: http://www.nature.com/ng
PLOS Genetics: http://www.plosgenetics.org
Breakthrough Breast Cancer: http://www.breakthrough.org.uk/
Associated Presstim thomas oral roberts les paul fred thompson fred thompson red hook romney tax return
When driving around Grand Junction, your minivan engine needs clean air to burn the fuel ? and it needs a lot. In fact, a typical vehicle needs about 216,000 gallons of air for every tank of gas.
All that air passes through a filter that catches the dust and dirt. Eventually the filter gets completely full. Because the filter can only hold so much, dirt starts getting through. This dirty air passes through the mass airflow sensor, and starts to accumulate on the delicate sensor element. The mass air flow sensor measures how much air is getting into your engine. When the airflow reading is incorrect, your minivan engine doesn?t get the proper amount of fuel. It runs rough and doesn?t perform as well as it should.
Eventually, the sensor is so damaged it needs to be replaced ? which is pricy. In fact you could buy a case or two of air filters for the cost of a sensor replacement.
Of course, that dirty air keeps on going through to your minivan engine where it?s burned along with the fuel, which dirties up your combustion chamber and increases harmful exhaust emissions ? not a good thing for Grand Junction air quality, not to mention our lungs.
When your knowledgeable Bear Automotive & RV Service Inc service advisor brings out your dirty air filter and recommends a replacement, remember the cost and poor performance that can be waiting for you down the road if you neglect this simple Bear Automotive & RV Service Inc service. Ask your Bear Automotive & RV Service Inc advisor if it?s time to replace your engine air filter.
Bear Automotive & RV Service Inc in Grand Junction has been providing quality auto repair services for Grand Junction auto owners for 3 years. Our specialties include wheel bearing service, windshield treatment, and battery service.
Give us a call
Bear Automotive & RV Service Inc
970.245.2585
1315 Pitkin Ave
Grand Junction, CO 81501
At Bear Automotive & RV Service Inc in Grand Junction CO (81501) we install quality NAPA replacement parts. Give us a call at 970.245.2585. To learn more about NAPA AutoCare, visit www.NAPAAutoCare.com.
This entry was posted on Wednesday, March 27th, 2013 at 7:44 pm and is filed under Engine Air Filter. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.
world trade center kirk cousins ovechkin one world trade center bks new dark knight rises trailer khloe and lamar
Twitterrific, the elegant Iconfactory Twitter client for iPhone and iPad, has been updated to support one of their most requested features -- push notifications. Currently in beta, users are being added to Twitterrific's push system in batches of 1,000 to make sure servers stay up and the experience remains positive for everyone. If you don't get into the push beta immediately, just try again in a few days. (You can find it in the Settings section.)
Also in version 5.2, user banners have been added to profile pages, discussions are now shareable via email or storify, Doplr gets thumb-nailed, and the usual bevy of improvements, additions, and fixes.
I've been using the push notifications for roughly a day now and they've been working really well. In addition to the message itself, the Iconfactory has included small icons at the beginning of the notification to help you quickly, easily differentiate between mentions, direct messages, re-tweets, favorites, and others.
You can grab the update now, and If you're not using Twitterrific yet, check it out and let me know what you think.
Source: http://feedproxy.google.com/~r/TheIphoneBlog/~3/J2Qlhy6BvKQ/story01.htm
qnexa kingdom of heaven national enquirer whitney houston arizona republican debate arizona debate enquirer national inquirer
Paul A. Eisenstein , The Detroit Bureau ? ? ? 6 hrs.
If we said the new 2014 Odyssey minivan sucked, Honda might just take that as a compliment. The updated Odyssey Touring Elite model debuting at the New York Auto Show will introduce a new feature likely to have significant appeal to family buyers ? the first in-car vacuum.
Big Week in the Big Apple as NY Auto Show Reveals Over Two Dozen New Vehicles
The HondaVAC is one of several new features being introduced on the 2014 Honda Odyssey which has gained steady momentum in an otherwise shrinking market segment.
Minivan sales are currently less than half of what they peaked at a decade ago, but there is still a sizable demand among family buyers who see them as the most functional and efficient people-movers on the market. The challenge is coming up with a consistent stream of new innovations.
Car buyers crave connectivity
?Honda is once again showcasing its reputation for innovation with HondaVAC, and its ability to provide true value to our customers,? proclaimed Michael Accavitti, vice president of marketing operations at American Honda.
The outgoing Odyssey attempted to show that Honda could inject a little style into the segment, as well. The 2014 update undergoes only modest exterior tweaks, however, with a more deeply sculpted hood and revised fenders, as well as a more distinctive twin-bar grille. There are also new LED taillamp bars and revised badging.
Like so many of its competitors, the Japanese maker is slashing mass to improve fuel economy ? as well as handling. The hood and front fenders are now stamped out of lightweight aluminum.
Inside, the Odyssey adds some new finishes to brighten the cabin, along with an all-new center stack housing a number of new high-tech features. That includes an updated HondaLink infotainment system that can link with an owner?s smartphone to access live, personalized radio ?stations? and also give voice access to updates and news feeds from Facebook and Twitter. The system can also be used to find a nearby restaurant and then check its reviews.
New NHTSA iPhone App Lets You Track Recalls, Crash Tests, Even Helps With Child Seats
The 2014 Honda Odyssey will get a new Expanded View Driver?s Mirror along with new active safety features such as Forward Collision Warning and Lane Departure Warning.
Safety is, of course, a critical issue for family buyers, and Odyssey has gained traction after scoring a five-star overall rating in the NHTSA crash tests. The 2013 model also was named a Top Safety Pick by the Insurance Institute for Highway Safety.
As for the HondaVAC, it was developed in cooperation with Shop-Vac and can operate continuously when the minivan?s engine is running. It will continue to operate for eight minutes after the engine is turned off.
Cadillac Changing Game with Third-Generation CTS
Copyright ? 2009-2013, The Detroit Bureau
dwyane wade the night they drove old dixie down levon oklahoma city bombing robbie robertson the curious case of benjamin button secret service prostitute
PHOENIX ? Faced with an outcry from advocacy groups, an Arizona lawmaker has changed his proposed legislation that would have made it a crime for a transgendered person to use a bathroom other than his or her birth sex.
The new bill by state Rep. John Kavanagh ditches that effort and instead seeks to shield businesses from civil or criminal liability if they ban people from restrooms that don't match their birth sex. The House committee Kavanagh chairs voted to advance the so-called "bathroom bill" late Wednesday on a 7-4 party-line vote as a crowd broke out in chants of "shame, shame, shame."
The hearing room was packed with people from the LGBT community who opposed the bill and complained that even the revised version was based on fear.
Patty Medway, a transgendered woman who was born a man, said she's been using female bathrooms for years without a problem. She called on Kavanagh to back away from his effort.
"I've been using washrooms for 15 years and I don't want to be discriminated against, and I'm scared to go to a male washroom," she said.
The conservative Republican said he listened to the criticism of what one local television station dubbed the "Show Me Your Papers Before You Go Potty" bill.
The revised bill is designed to shield businesses from lawsuits while protecting people from being exposed to what he described as "naked men in women's locker rooms and showers," Kavanagh said. It doesn't prohibit businesses from allowing transgender people from using the restroom they want.
To Kavanagh's point that he worried about young girls being exposed to transgendered people in restrooms, Medway said that just doesn't happen.
"In ladies washrooms, they're all stalls, they are segmented," she said.
The changes to his bill don't make rights groups feel any better.
"These sort of tabloid attacks around bathroom behavior are largely overblown," said Andre Banks, a New York-based spokesman for All Out, a group that advocates for LGBT rights. "Often these sort of great fears that people bring up never come to fruition. But what is very real is the kind of violence, discrimination and intimidation that transgender people face all across this country."
Rep. Stefanie Mach, a Tucson Democrat on Kavanagh's Appropriations Committee, called the proposal "an unnecessary response."
"It's just over the top," she said.
Also on HuffPost:
"; var coords = [-5, -72]; // display fb-bubble FloatingPrompt.embed(this, html, undefined, 'top', {fp_intersects:1, timeout_remove:2000,ignore_arrow: true, width:236, add_xy:coords, class_name: 'clear-overlay'}); });
Source: http://www.huffingtonpost.com/2013/03/27/arizona-transgender-bathroom-bill_n_2967997.html
kobayashi margaret sanger paul george eddie long ufc 143 weigh ins micron ceo glenn miller
Contact: Daniel Fowler
pubinfo@asanet.org
202-527-7885
American Sociological Association
WASHINGTON, DC, March 25, 2013 True fame isn't fleeting. That's what a team of researchers led by McGill University's Eran Shor and Stony Brook University's Arnout van de Rijt conclude in a new study that appears in the April issue of the American Sociological Review.
The researchers studied the names mentioned in English-language newspapers over a period of several decades. What they found was that, contrary to popular belief, the people who become truly famous, stay famous for decades, and that this is the case whatever field they're in, including sports, politics, and other domains.
This is even true of entertainment, where it might appear that fame is likely to be most ephemeral. For example, in a random sample of 100,000 names that appeared in the entertainment sections of more than 2,000 newspapers between 2004-2009, the 10 names that showed up most frequently were Jamie Foxx, Bill Murray, Natalie Portman, Tommy Lee Jones, Naomi Watts, Howard Hughes, Phil Spector, John Malkovich, Adrien Brody, and Steve Buscemi. All have been celebrated for at least a decade and all are still much talked about today.
The finding that true fame isn't fleeting goes against most of the scholarly research until now. "There is almost a consensus among scholars in the field of the sociology of fame, that most fame is ephemeral," said Shor, an assistant professor in McGill's department of sociology. "What we've shown here that is truly revolutionary is that the people who you and I would consider famous, even the Kim Kardashians of this world, stay famous for a long time. It doesn't come and go."
Indeed, the annual turnover in the group of famous names is very low. Ninety-six percent of those whose names were mentioned over 100 times in the newspapers in a given year were already in the news at least three years before. The authors point out that this can be explained by the fact that both media and audiences are trapped in a self-reinforcing equilibrium where they must continue to devote attention, airtime, and newspaper space to the same old characters because everyone else does so as well. Talent, resources, or chance events may propel an individual into the spotlight. But, once someone becomes truly famous, they tend to stay that way. Temporary celebrity is highly unusual and is to be found primarily in the bottom tiers of the fame hierarchy, such as when people like whistle blowers become famous for a limited time for participating in particular events.
In general, big names follow career-type patterns of growth, sustenance, and gradual decay over the course of decades. "As with all sociological regularities, our claim is not absolute," said Van de Rijt, an assistant professor in Stony Brook's department of sociology. "We can all think of examples of both types, fleeting and long-term fame. Leonard Cohen is still well known today, over 40 years after he first became famous. But, Chesley Sullenberger, the pilot who received instant fame after safely landing a disabled plane on the Hudson, is a name that will likely be forgotten pretty quickly. What we have shown is that Leonard Cohen is the rule and Chesley Sullenberger the exception."
The researchers, who also include Charles Ward, a software engineer at Google, and Steven Skiena, a distinguished teaching professor of computer science at Stony Brook, acknowledge that there is further work to be done with data from blogs, television, and video sharing sites like YouTube to see whether the same patterns hold true there.
###
About the American Sociological Association and the American Sociological Review
The American Sociological Association (http://www.asanet.org), founded in 1905, is a non-profit membership association dedicated to serving sociologists in their work, advancing sociology as a science and profession, and promoting the contributions to and use of sociology by society. The American Sociological Review is the ASA's flagship journal.
The research article described above is available by request for members of the media. For a copy of the full study, contact Daniel Fowler, ASA's Media Relations and Public Affairs Officer, at (202) 527-7885 or pubinfo@asanet.org.
For more information about the study, members of the media can also contact Katherine Gombay, McGill University, at (514) 398-2189 or katherine.gombay@mcgill.ca.
?
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.
Contact: Daniel Fowler
pubinfo@asanet.org
202-527-7885
American Sociological Association
WASHINGTON, DC, March 25, 2013 True fame isn't fleeting. That's what a team of researchers led by McGill University's Eran Shor and Stony Brook University's Arnout van de Rijt conclude in a new study that appears in the April issue of the American Sociological Review.
The researchers studied the names mentioned in English-language newspapers over a period of several decades. What they found was that, contrary to popular belief, the people who become truly famous, stay famous for decades, and that this is the case whatever field they're in, including sports, politics, and other domains.
This is even true of entertainment, where it might appear that fame is likely to be most ephemeral. For example, in a random sample of 100,000 names that appeared in the entertainment sections of more than 2,000 newspapers between 2004-2009, the 10 names that showed up most frequently were Jamie Foxx, Bill Murray, Natalie Portman, Tommy Lee Jones, Naomi Watts, Howard Hughes, Phil Spector, John Malkovich, Adrien Brody, and Steve Buscemi. All have been celebrated for at least a decade and all are still much talked about today.
The finding that true fame isn't fleeting goes against most of the scholarly research until now. "There is almost a consensus among scholars in the field of the sociology of fame, that most fame is ephemeral," said Shor, an assistant professor in McGill's department of sociology. "What we've shown here that is truly revolutionary is that the people who you and I would consider famous, even the Kim Kardashians of this world, stay famous for a long time. It doesn't come and go."
Indeed, the annual turnover in the group of famous names is very low. Ninety-six percent of those whose names were mentioned over 100 times in the newspapers in a given year were already in the news at least three years before. The authors point out that this can be explained by the fact that both media and audiences are trapped in a self-reinforcing equilibrium where they must continue to devote attention, airtime, and newspaper space to the same old characters because everyone else does so as well. Talent, resources, or chance events may propel an individual into the spotlight. But, once someone becomes truly famous, they tend to stay that way. Temporary celebrity is highly unusual and is to be found primarily in the bottom tiers of the fame hierarchy, such as when people like whistle blowers become famous for a limited time for participating in particular events.
In general, big names follow career-type patterns of growth, sustenance, and gradual decay over the course of decades. "As with all sociological regularities, our claim is not absolute," said Van de Rijt, an assistant professor in Stony Brook's department of sociology. "We can all think of examples of both types, fleeting and long-term fame. Leonard Cohen is still well known today, over 40 years after he first became famous. But, Chesley Sullenberger, the pilot who received instant fame after safely landing a disabled plane on the Hudson, is a name that will likely be forgotten pretty quickly. What we have shown is that Leonard Cohen is the rule and Chesley Sullenberger the exception."
The researchers, who also include Charles Ward, a software engineer at Google, and Steven Skiena, a distinguished teaching professor of computer science at Stony Brook, acknowledge that there is further work to be done with data from blogs, television, and video sharing sites like YouTube to see whether the same patterns hold true there.
###
About the American Sociological Association and the American Sociological Review
The American Sociological Association (http://www.asanet.org), founded in 1905, is a non-profit membership association dedicated to serving sociologists in their work, advancing sociology as a science and profession, and promoting the contributions to and use of sociology by society. The American Sociological Review is the ASA's flagship journal.
The research article described above is available by request for members of the media. For a copy of the full study, contact Daniel Fowler, ASA's Media Relations and Public Affairs Officer, at (202) 527-7885 or pubinfo@asanet.org.
For more information about the study, members of the media can also contact Katherine Gombay, McGill University, at (514) 398-2189 or katherine.gombay@mcgill.ca.
?
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/2013-03/asa-fmo032513.php
albert pujols the shining mariano rivera mariano rivera jobs report tiger woods masters 2012 nikki haley
Mar. 27, 2013 ? Electronic computing speeds are brushing up against limits imposed by the laws of physics. Photonic computing, where photons replace comparatively slow electrons in representing information, could surpass those limitations, but the components of such computers require semiconductors that can emit light.
Now, research from the University of Pennsylvania has enabled "bulk" silicon to emit broad-spectrum, visible light for the first time, opening the possibility of using the element in devices that have both electronic and photonic components.
The research was conducted by associate professor Ritesh Agarwal, postdoctoral fellow Chang-Hee Cho and graduate students Carlos O. Aspetti and Joohee Park, all of the Department of Materials Science and Engineering in Penn's School of Engineering and Applied Science.
Their work was published in Nature Photonics.
Certain semiconductors, when imparted with energy, in turn emit light; they directly produce photons, instead of producing heat. This phenomenon is commonplace and used in light-emitting diodes, or LEDs, which are ubiquitous in traffic signals, new types of light bulbs, computer displays and other electronic and optoelectronic devices. Getting the desired photonic properties often means finding the right semiconducting material. Agarwal's group produced the first ever all-optical switch out of cadmium sulfide nanowires, for example.
Semiconducting materials -- especially silicon -- form the backbone of modern electronics and computing, but, unfortunately, silicon is an especially poor emitter of light. It belongs to a group of semiconducting materials, which turns added energy into heat. This makes integrating electronic and photonic circuits a challenge; materials with desirable photonic properties, such as cadmium sulfide, tend to have poor electrical properties and vice versa and are not compatible with silicon-based electronic devices.
"The problem is that electronic devices are made of silicon and photonic devices are typically not," Agarwal said. "Silicon doesn't emit light and the materials that do aren't necessarily the best materials for making electronic devices."
With silicon entrenched as the material of choice for the electronics industry, augmenting its optical properties so it could be integrated into photonic circuitry would make consumer-level applications of the technology more feasible.
"People have tried to solve this problem by doping silicon with other materials, but the light emission is then in the very long wavelength range, so it's not visible and not very efficient and can degrade its electronic properties," Agarwal said. "Another approach is to make silicon devices that are very small, five nanometers in diameter or less. At that size you have quantum confinement effects, which allows the device to emit light, but making electrical connections at that scale isn't currently feasible, and the electrical conductivity would be very low."
To get elemental, "bulk" silicon to emit light, Agarwal's team drew upon previous research they had conducted on plasmonic cavities. In that earlier work, the researchers wrapped a cadmium sulfide nanowire first in a layer of silicon dioxide, essentially glass, and then in a layer of silver. The silver coating supports what are known as surface plasmons, waves that are a combination of oscillating metal electrons and of light. These surface plasmons are highly confined to the surface where the silicon dioxide and silver layers meet. For certain nanowire sizes, the silver coating creates pockets of resonance and hence highly confined electromagnetic fields -- in other words, light -- within the nanostructure.
Normally, after excitation the semiconductor must first "cool down," releasing energy as heat, before "jumping" back to the ground state and finally releasing the remaining energy as light. The Penn team's semiconductor nanowires coupled with plasmonic nanocavities, however, can jump directly from a high-energy excited state to the ground state, all but eliminating the heat-releasing cool-down period. This ultra-fast emission time opens the possibility of producing light from semiconductors such as silicon that might otherwise only produce heat.
"If we can make the carriers recombine immediately," Agarwal said, "then we can produce light in silicon."
In their latest work, the group wrapped pure silicon nanowires in a similar fashion, first with a coating of glass and then one of silver. In this case, however, the silver did not wrap completely around the wire as the researchers first mounted the glass-coated silicon on a sperate pane of glass. Tucking under the curve of the wire but unable to go between it and the glass substrate, the silver coating took on the shape of the greek letter omega -- ? -- while still acting as a plasmonic cavity.
Critically, the transparent bottom of the omega allowed the researchers to impart energy to the semiconductor with a laser and then examine the light silicon emitted.
Even though the silicon nanowire is excited at a single energy level, which corresponds to the wavelength of the blue laser, it produces white light that spans the visible spectrum. This translates into a broad bandwidth for possible operation in a photonic or optoelectronic device. In the future, it should also be possible to excite these silicon nanowires electrically.
"If you can make the silicon emit light itself, you don't have to have an external light source on the chip," Agarwal said. "We could excite the silicon electrically and get the same effect, and we can make it work with wires from 20 to 100 nanometers in diameter, so it's very compatible in terms of length scale with current electronics."
The research was supported by the U.S. Army Research Office and the National Institutes of Health.
Share this story on Facebook, Twitter, and Google:
Other social bookmarking and sharing tools:
Story Source:
The above story is reprinted from materials provided by University of Pennsylvania.
Note: Materials may be edited for content and length. For further information, please contact the source cited above.
Journal Reference:
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/matter_energy/physics/~3/U1h28iUkbn4/130327133517.htm
Olympics Live Mens Gymnastics Allison Schmitt Olympic Schedule Kyla Ross Ryan Lochte Montenegro