Wednesday, February 22, 2012
Some money from mortgage settlement to be diverted (AP)
ORNL finding has materials scientists entering new territory
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Public release date: 21-Feb-2012[ | E-mail |
Share ] Contact: Ron Walli
wallira@ornl.gov
865-576-0226
DOE/Oak Ridge National Laboratory
Solar cells, light emitting diodes, displays and other electronic devices could get a bump in performance because of a discovery at the Department of Energy's Oak Ridge National Laboratory that establishes new boundaries for controlling band gaps.
While complex transition metal oxides have for years held great promise for a variety of information and energy applications, the challenge has been to devise a method to reduce band gaps of those insulators without compromising the material's useful physical properties.
The band gap is a major factor in determining electrical conductivity in a material and directly determines the upper wavelength limit of light absorption. Thus, achieving wide band gap tunability is highly desirable for developing opto-electronic devices and energy materials.
Using a layer-by-layer growth technique for which Ho Nyung Lee of ORNL earned the Presidential Early Career Award for Scientists and Engineers, Lee and colleagues have achieved a 30 percent reduction in the band gap of complex metal oxides. The findings are outlined in the journal Nature Communications.
"Our approach to tuning band gaps is based on atomic-scale growth control of complex oxide materials, yielding novel artificial materials that do not exist in nature," Lee said. "This 'epitaxy' technique can be used to design entirely new materials or to specifically modify the composition of thin-film crystals with sub-nanometer accuracy."
While band gap tuning has been widely successful for more conventional semiconductors, the 30 percent band gap reduction demonstrated with oxides easily surpasses previous accomplishments of 6 percent or 0.2 electron volt in this area and opens pathways to new approaches to controlling band gap in complex-oxide materials.
With this discovery, the potential exists for oxides with band gaps to be continuously controlled over 1 electron volt by site-specific alloying developed by the ORNL team. "Therefore," Lee said, "this work represents a major achievement using complex oxides that offer a number of advantages as they are very stable under extreme and severe environments."
ORNL's Michelle Buchanan, associate lab director for the Physical Sciences Directorate, expanded on Lee's sentiment. "This work exemplifies how basic research can provide technical breakthroughs that will result in vastly improved energy technologies," she said.
###
Other authors of the paper, titled "Wide band gap tunability in complex transition metal oxides by site-specific substitution," are Woo Seok Choi, Matthew Chisholm, David Singh, Taekjib Choi and Gerald Jellison of ORNL's Materials Science and Technology Division. A patent is pending for this technology.
The research was funded initially by the Laboratory Directed Research and Development program and later by the Department of Energy's Office of Science. Optical measurements were performed in part at the Center for Nanophase Materials Sciences, a DOE-BES user facility at ORNL.
UT-Battelle manages ORNL for the Office of Science. The Office of Science is the single largest supporter of basic research in the physical sciences in the United States and is working to address some of the most pressing challenges of our time. For more information, please visit http://science.energy.gov/
[ | E-mail | Share ] ?
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: 21-Feb-2012[ | E-mail |
Share ] Contact: Ron Walli
wallira@ornl.gov
865-576-0226
DOE/Oak Ridge National Laboratory
Solar cells, light emitting diodes, displays and other electronic devices could get a bump in performance because of a discovery at the Department of Energy's Oak Ridge National Laboratory that establishes new boundaries for controlling band gaps.
While complex transition metal oxides have for years held great promise for a variety of information and energy applications, the challenge has been to devise a method to reduce band gaps of those insulators without compromising the material's useful physical properties.
The band gap is a major factor in determining electrical conductivity in a material and directly determines the upper wavelength limit of light absorption. Thus, achieving wide band gap tunability is highly desirable for developing opto-electronic devices and energy materials.
Using a layer-by-layer growth technique for which Ho Nyung Lee of ORNL earned the Presidential Early Career Award for Scientists and Engineers, Lee and colleagues have achieved a 30 percent reduction in the band gap of complex metal oxides. The findings are outlined in the journal Nature Communications.
"Our approach to tuning band gaps is based on atomic-scale growth control of complex oxide materials, yielding novel artificial materials that do not exist in nature," Lee said. "This 'epitaxy' technique can be used to design entirely new materials or to specifically modify the composition of thin-film crystals with sub-nanometer accuracy."
While band gap tuning has been widely successful for more conventional semiconductors, the 30 percent band gap reduction demonstrated with oxides easily surpasses previous accomplishments of 6 percent or 0.2 electron volt in this area and opens pathways to new approaches to controlling band gap in complex-oxide materials.
With this discovery, the potential exists for oxides with band gaps to be continuously controlled over 1 electron volt by site-specific alloying developed by the ORNL team. "Therefore," Lee said, "this work represents a major achievement using complex oxides that offer a number of advantages as they are very stable under extreme and severe environments."
ORNL's Michelle Buchanan, associate lab director for the Physical Sciences Directorate, expanded on Lee's sentiment. "This work exemplifies how basic research can provide technical breakthroughs that will result in vastly improved energy technologies," she said.
###
Other authors of the paper, titled "Wide band gap tunability in complex transition metal oxides by site-specific substitution," are Woo Seok Choi, Matthew Chisholm, David Singh, Taekjib Choi and Gerald Jellison of ORNL's Materials Science and Technology Division. A patent is pending for this technology.
The research was funded initially by the Laboratory Directed Research and Development program and later by the Department of Energy's Office of Science. Optical measurements were performed in part at the Center for Nanophase Materials Sciences, a DOE-BES user facility at ORNL.
UT-Battelle manages ORNL for the Office of Science. The Office of Science is the single largest supporter of basic research in the physical sciences in the United States and is working to address some of the most pressing challenges of our time. For more information, please visit http://science.energy.gov/
[ | E-mail | Share ] ?
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/2012-02/drnl-ofh022112.php
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tracychopzmahstyle: An Internal Consider the Special Education ...
Exactly What Does the task Entail?
Do you enjoy helping others? Are you able to handle and care for those who learn in a different way and also have other behavior problems? Would you like to really make a difference inside a youthful child's existence? Should you clarified "yes" to these questions, then you definitely might think about a career in special education. Below is really a introduction to rapid and lengthy-term duties of the special education teacher.
First of all, special education instructors concentrate on the development and academic needs of kids with disabilities. They encourage learning in disabled students by applying educational modules and behavior techniques. Special education instructors work alone or with general education instructors to individualize training, develop problem-fixing techniques and integrate children into group projects along with other students. In addition, special education instructors have the effect of making certain that the requirements of disabled youngsters are met throughout assessment periods.
Are you aware that special education instructors make use of a team of professionals, qualified staff and family to be able to fulfill their job needs? It is a fact. Actually, special education instructors work along with these organizations to produce a personalized Education Program (IEP) for every student. An IEP was created together with children's parents, school principal, social worker, speech pathologist and general education teacher to make sure effective implementation. An IEP targets a student's needs and growth areas for optimum response. The specialized goals set through the IEP are woven throughout every aspect of the child's day to day activities. Instructors of special education must monitor children's difficulties and progress and report on their behavior to oldsters and managers. Planned goals and jobs are layed out to see relatives people to consult while students reaches home too.
The kinds of disabilities a unique education teacher might encounter take time and effort to calculate. For just one, the qualifications for special education services vary greatly from mild disabilities to extreme installments of mental retardation or autism. Kinds of disabilities include, but aren't restricted to, the next: speech problems, hearing disabilities, emotional disturbances, memory foam problems, brain trauma cases, blindness, deafness and learning disabilities.
Would You Exhibit These Characteristics?
Now that you've got a concept of the job's demands, let's wait and watch if you possess the right characteristics to become a special education teacher.
Recognize the signs and symptoms and requires of special needs students
Persistence
Ability to utilize a number of parties to attain short-term and lengthy-term goals
Strong communication abilities
Capability to motivate others
Capability to multi-task
Understanding of the very recent education modules, scientific research and behavior practices
Creativeness
Understanding from the latest medical technology highly relevant to special education
Taking the next phase toward a new job
After you have made the decision to go in the area of special education, you will have to follow several steps. Because of the specialty area from the area, special education instructors in most 50 states must receive licensure before employment. Licensures are approved by each state's board of your practice, and also the needs for certification differ between states. Nonetheless, the growing shortage of special education instructors has brought institutions of greater education to provide more special education degree and certification programs. Actually, special education levels can be found in the bachelor's, masters and doctorate levels through the nation. As well as, the flourishing area of distance education makes certification more accessible from the location within the U . s . States.
Oftentimes, hopeful special education professionals don't satisfy the needs of special education licensure because of their prior completing degree programs outdoors from the area of your practice. Therefore, several states have started to offer alternate types of certification. Anticipation of those programs would be to attract new special education professionals and fill the growing requirement for instructors. The opportunity to positively impact the lives of special needs children is among the driving motivations and advantages of entering this area.
After many years, some kind of special education instructors search for new possibilities inside their area. In most situations, special education professionals transfer to administrative or supervisory positions. Others, after getting a greater degree, become college professors and educate new students within the area of special education. Experienced instructors of special needs students also have increased for everyone as mentors to incoming special education instructors.
For the way forward for special education and employment, you will find many changes coming. Most considerably, the task market in special education, based on the Bureau at work Statistics (BLS), is forecasted to "increase faster compared to average of jobs by 2014." Because of the brand new focus on education and learning legislature, special education professionals will end up much more valued.
Can One Earn a living like a Special Education Teacher?
As pointed out formerly, the special education employment market is rising. In 2004, the BLS reported 441,000 employed special education instructors within the nation. While only 6 % labored within private schools, over 90 % were utilized by public schools or districts. In rare cases, special education professionals were involved with home or hospital care.
Several factors determine a unique education teacher's financial compensation. Such factors include experience, educational background, section of niche and physical location. In May 2004, the BLS reported the next introduction to median annual earnings of special education instructors:
??? Preschool, kindergarten and elementary school level: - $43,570
??? Junior high school level: - $44,160
??? School level: - $45,700
Special education instructors receive increases in salary through additional participation within their schools' educational activities and thru training school sports teams. In certain districts, as being a mentor to a different special education teacher carries additional financial benefits. However, the most typical method to increase earnings is thru the conclusion of the greater degree, which could also create a teacher's instruction more credible and valuable.
Source: http://tracychopzmahstyle.blogspot.com/2012/02/internal-consider-special-education.html
Tuesday, February 21, 2012
TheWrap's Oscar picks: "The Artist" will win, but should it? (Reuters)
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Internet Articles Database ? Supplement Your Knowledge In ...
Copyright ? 2012 savvycontent.com
Almost everyone is connected to the internet. Not all people have accounts with social networking sites but surely they have electronic mails. People prefer the internet because it is faster and it can be accessed by a person almost anywhere in the world. People can upload news, photographs, and other trivial things on the internet that makes a person feel as if he witnessed everything with his own eyes.
The internet is a product of modernization. Although it was first conceptualized during the 1950?s, it wasn?t until the 1990?s when it surged into popularity as personal computers became available to the majority of the public. Along with that was the development of electronic mail and instant messages or chat services. One should understand that before the development of email and IM, the people communicated via snail mail which took at least one week before it got to the address it was being sent to. The services that were offered in the internet were very convenient for people, especially the businessmen. As the internet was developed further, many web architects have developed websites that would appeal to certain people. Some of these are websites forums or message boards, e-commerce or online retail business, blogs, and social networking sites. As of today, forums and social networking sites are the most popular among teens and young adults.
Forums are message boards that concentrate in one general topic. Forums have different subtopics or specific ideas that different members contribute in. Webmaster forums, in particular, are message boards that support webmasters or those who are interested in web architecture/design, they offer different tips for beginners, to web developers, and those who are into internet marketing. Some forums concentrate on tips about creating a website while others specialize on online business and e-commerce. Webmaster forums also help developers in troubleshooting the source codes that make up the various websites. There are a lot of forums that concentrate on HTML coding. They help other webmasters familiarize themselves with CSS codes and javascript.
Not only do these forums offer support, they also test the newly built websites of their members. They see if the website is user-friendly and if it will be appealing to the website owner?s target audience. There are expert webmasters who are members of different website forums and are willing to look over the new websites to see if the newbie web developer missed something or if he did a good job.
View this site and know more about website forums and sitemap help.
Related Posts
Source: http://internetarticlesdatabase.com/2012/02/supplement-your-knowledge-in-webmaster-forums/
Useful Weight Loss Tips Offered By A Peabody, MA Chiropractor ...
New Health And Fitness.Org - Health Information You Can Use
Chiropractic care offers patients solutions to all manner of body pain. One of the many causes of aches and pains is having excess weight. A Peabody chiropractor can help patients overcome the problems of excessive weight by giving useful and natural health tips.
There are many effects of excess weight. Important organs such as the heart could begin to under-function due to too much fat surrounding it and this can lead to heart disorders. Blood circulation becomes ineffective, thereby reducing the amount of blood, food nutrients and oxygen that is supplied round the body. Surplus body weight can also put too much tension on bones and joints.
The tension put on joints and bones makes the affected person easily prone to arthritis, rheumatism and other bone conditions. Joints may experiences displacements also. There will be gross inability to move freely and do things with ease like before.
The above are not pleasant conditions that people find themselves battling with. They result in excruciating pain and discomfort. Joints become sore and muscles become stiff as a result of under activity. Chiropractors can help in alleviating suffering for patients by helping them with tips with which they could maintain a moderate and healthy body mass.
Eating right is an important tip to maintaining a healthy body mass. Overeating can lead to excessive weight gain because the body is being fed more than it requires. Meals should be balanced with all the essential nutrients added. Moderation should be the watch word when eating. Large appetites must be curtailed.
A beneficial weight loss tip offered by a Peabody chiropractor for heavy individuals to stay healthy and pain-free is to workout regularly. Not exercising will make muscles rigid and weak. Excess fat will not be given an avenue to be used up because the individual is inactive. Taking time to workout daily will help to reduce body weight as surplus fat gets burnt off. Body muscles and joints will also be stimulated and made more flexible thereby making physical activity easy and effortless.
You can get excellent weight loss tips and a brief summary of the reasons why you should consult a Peabody chiropractor at http://www.blomerthchiropractic.com right now.
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iPad 3 logic board with 'A5X' chip purportedly snapped by Mr. Not-so-Blurrycam
iPad 3 logic board with 'A5X' chip purportedly snapped by Mr. Not-so-Blurrycam originally appeared on Engadget on Mon, 20 Feb 2012 05:09:00 EDT. Please see our terms for use of feeds.
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