Friday, May 17, 2013

Cancer, Grief, and Words | Angst in Anxiety - Psych Central Blogs

image_preview?I am not what has happened to me. I am what I choose to become.? ~ Carl Jung

I have been thinking a lot about cancer these days. Almost half my caseload has cancer or I see children who have lost a parent to cancer or spouses with a partner with cancer. It seems like cancer is everywhere. Cancer does affect everyone.

Grief is an intimate process of a uniquely individual design initiated for the purpose of transitioning loss.Loss is everywhere. Just like cancer.

When I work with cancer and those who bravely traverse the terrain of what this means to them I am in wonder of the courage it takes to make this emotional journey. Words help the process, yet words are difficult for people even though this is our main platform of communication. I hear people stumble with words, hold words back, bite their tongues, and express fear of saying too much or too little. I have some suggestions.

Words help us bridge to another. We want honest words well-honed to identify the emotion that is uppermost in our heart. So for the child with a dying father or the wife with a dying husband it is important to say things and to work on any unresolved piece that may exist. It is not that the world will fall apart if one doesn?t step up with truth, but the survivors of a death have years ahead to mull over what was and wasn?t said.

Children need help from the healthy parent (the one who does not have cancer) and the healthy parent needs help from friends, siblings, and other family members. Help that comes in the form of encouragement to go to the truth is important.

I work with so many people who are left with unfinished business following a death. It is as though the cancer that took mother carries on into her children or spouse. It is not cancer, but an emotional cancer.

Cancer that is not treatable or one that is aggressive and terminal produces a state of helplessness. Helplessness is an alarming state for mind, body, and spirit. Studies show a connection between depression and cancer, between stressors and cancer, and between sustained powerlessness and disease or illness.

Words of love, words of connection, words of gratitude and words that evoke hope are all good. Everyone leaves a legacy and even death is filled with a gift. People leave their spirit, their contributions, their love, their strength, their bonds, and hundreds of things behind for the use of others with their passing. These things that are left often come in the form of words. We are all pebbles thrown into a large or small pond with ripples that extend endlessly.

There is power in words. Words have the ability to soothe and mend or to wound and destroy.

Take each word and mold it to fit your most compassionate truth. Find the word that rolls easily from your heart before it is projected outward. Practice how gently you can convey even the most difficult feelings. Words are our creation. Words help us grieve. Words are an intimate part of the grief process.

Take Care and Be Well

Nanette Burton Mongelluzzo, PhD



????Last reviewed: 17 May 2013

APA Reference
Burton Mongelluzzo, N. (2013). Cancer, Grief, and Words. Psych Central. Retrieved on May 17, 2013, from http://blogs.psychcentral.com/angst-anxiety/2013/05/cancer-grief-and-words/

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Source: http://blogs.psychcentral.com/angst-anxiety/2013/05/cancer-grief-and-words/

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Tuesday, April 30, 2013

Jon Jones, Pat Healy and Sara McMann: UFC 159?s Three Stars

UFC 159 was a bizarre event ? possibly cursed by demons ? but there were still plenty of standout performances by fighters whose bouts ended normally. Who stood out for you? Speak up on Twitter or on Facebook.

No. 1 star -- Jon Jones: As we've said since the fight was made, Chael Sonnen was not the right competition for UFC light heavyweight Jones because he is middleweight coming off of a loss. Jones could have taken Sonnen lightly and still probably won, but he didn't do that. He used the fight as another opportunity to show his dominance, beating Sonnen at his own game by taking him down several times before finishing the fight near the end of the first round.

Would the fight have been stopped if they made it out of the first round, and the referee had noticed Jones' mangled toe? Who cares? It didn't happen, and Jones is still the champ.

No. 2 star -- Pat Healy: The UFC's already stacked lightweight division somehow got even tough with Healy's performance on Saturday night. Along with Jim Miller, he put on a show then finished the fight in the third round. He won both Fight of the Night and Submission of the Night, meaning Healy walked away with an extra $130,000.

No. 3 star -- Sara McMann: As an Olympic silver medal-winning wrestler, McMann is one of the most decorated athletes to join the UFC. This means she had big expectations to perform, and she exceeded them. McMann used wrestling and power to stop Sheila Gaff in the first round.

Source: http://sports.yahoo.com/blogs/mma-cagewriter/jon-jones-pat-healy-sara-mcmann-ufc-159-132329967.html

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Monday, April 29, 2013

Demand drives TVA renewable energy projects

KNOXVILLE, Tenn. (AP) -- The Tennessee Valley Authority has approved more than 250 small-scale renewable energy projects for 2013, the overwhelming majority relying on solar energy.

TVA officials say the demand for renewable energy projects across the Tennessee Valley is strong ? so strong that the agency has met its application goals for 2013.

TVA has been working with local power companies since January to approve applications for renewable energy systems as part of its Green Power Providers program. Officials say all but two of the 250 projects are solar installations.

The agency has also met its application goals under the Solar Solutions Initiative pilot program, which promotes green jobs in the region.

TVA is a corporate agency of the U.S. government that provides power to 9 million people in seven southeastern states.

Source: http://news.yahoo.com/demand-drives-tva-renewable-energy-152422230.html

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Things To Consider When Looking For A Beginner's Music Lessons ...

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Source: http://entertain-art.blogspot.com/2013/04/things-to-consider-when-looking-for.html

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Friday, April 26, 2013

US-MUSIC Summary

Mamma Mia! Bookie offers odds on ABBA reunion

LONDON (Reuters) - A British bookmaker is taking bets on an ABBA comeback after singer Agnetha Faltskog hinted at a possible reunion for Sweden's most successful band. Faltskog, who has come out of retirement to release a solo album called "A", was asked by German's Die Zeit Magazine if she would be open to an ABBA reunion and she responded positively.

Psy knocked from top of Korean charts by 63-year-old singer

SEOUL (Reuters) - South Korean rapper Psy, whose latest video "Gentleman" tracked global megahit "Gangnam Style" by going viral on the Internet, has been knocked from the top of the music charts in his native country by a 63-year-old easy listening pop singer. "Gangnam Style", which holds the YouTube record for most views with more than 1.5 billion, catapulted the sunglassed Korean with the garish jackets to world stardom and made him one of the best-known faces to grace the growing K-pop music scene.

Documentary about deceased British singer Amy Winehouse in the works

(Reuters) - A documentary is in the works about the late British soul singer Amy Winehouse and it features previously unseen material, the film's distributor said on Wednesday. The film, which will include archival footage never seen by the public, will be directed by Briton Asif Kapadia, whose 2010 film "Senna," about Brazilian auto racer Ayrton Senna, won a BAFTA for best documentary.

Kurdish singer sparks identity debate on Arab talent show

ARBIL, Iraq (Reuters) - A singer from Iraq's Kurdistan region has made it through to the semi-final of an Arab talent contest, igniting heated debates over Iraqi identity and politicizing the popular TV show. A panel of judges praised 24-year-old Parwaz Hussein and she was voted through to the next round of "Arab Idol", in which aspiring popstars from Morocco to Bahrain compete for a recording contract.

Swedish police find drugs on Justin Bieber bus, no suspects

STOCKHOLM (Reuters) - Swedish police said on Thursday they found drugs on teen idol Justin Bieber's tour bus in Stockholm, but had no suspects and were unlikely to pursue the case further. A police officer on crowd duty smelled marijuana on an empty tour bus outside the hotel where Bieber was staying just before his concert in the capital on Wednesday night, police spokesman Kjell Lindgren said.

Michael Jackson wrongful death trial set to get underway Monday

LOS ANGELES (Reuters) - The civil trial over the death of Michael Jackson is set to get formally underway next week after jury selection was completed on Tuesday in the $40 billion case that pits the pop star's mother against concert promoters AEG Live. Six alternate jurors were chosen on Tuesday following the selection a day earlier of a jury of six men and six women for what is expected to be an emotional three-month trial.

Fall Out Boy outsells Kid Cudi for top spot on Billboard chart

LOS ANGELES (Reuters) - U.S. rock band Fall Out Boy topped the Billboard 200 weekly best-selling album chart for the second time in their five-album career, besting rapper Kid Cudi. "Save Rock and Roll" sold 154,000 copies in its debut week, according figures on Wednesday from Nielsen SoundScan, outpacing Kid Cudi's "Indicud," which sold 136,000 copies in its first week.

Singer Lauryn Hill gets reprieve on tax evasion sentencing

NEWARK (Reuters) - Grammy Award-winning singer Lauryn Hill was given a two-week reprieve on her sentencing for federal tax evasion on Monday as a federal judge admonished her defense counsel for failing to come up with most of the tax money promised prior to her scheduled hearing. Hill, a solo artist and a member of the Fugees rap trio, pleaded guilty in June 2012 to failure to file federal tax returns from 2005-2007, when she earned $1.8 million. She faces up to a year in prison for each charge.

Backstreet Boys get Hollywood star ahead of world tour

LOS ANGELES (Reuters) - Boy band the Backstreet Boys - now all grown men - on Monday marked their 20th anniversary and their upcoming world tour by getting a star on the Hollywood Walk of Fame. "Backstreet is Back ... and we aren't going anywhere," Nick Carter, 33, told fans as all five members of the 1990s band gathered to unveil their star - located right next to another popular boy band, Boyz II Men.

Folk musician Richie Havens dead at 72

LOS ANGELES (Reuters) - U.S. folk musician Richie Havens, who opened the historic 1969 Woodstock musical festival and energized the crowd with his version of "Motherless Child/Freedom," died of a heart attack on Monday at the age of 72, his talent agency said. Havens, who emerged from the New York folk scene in the 1960s and went on to sing for the Dalai Lama and President Bill Clinton, died at his home in Jersey City, New Jersey, Roots Agency President Tim Drake told Reuters.

Source: http://news.yahoo.com/us-music-summary-081908906.html

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Obama to meet business executives ahead of Central American trip

WASHINGTON (Reuters) - President Barack Obama will meet on Friday with a group of U.S. business executives whose companies have a major presence in Mexico and Central America, the White House said on Thursday.

Obama departs for a trip to Mexico and Costa Rica next week.

Here is the list of business leaders expected to meet with him at the White House:

John Bilbrey, chief executive, Hershey Co

Franklin Chang D?az, president, Ad Astra Rocket Company

Andres Gluski, chief executive, AES Corp

Robert A. McDonald, chief executive, Procter & Gamble Co

Manuel Medina-Mora, co-president, Citigroup and chairman, Banamex

Luis Alberto Moreno, president, Inter-American Development Bank

J. Miles Reiter, chief executive, Driscoll's

Mark Snell, president, Sempra Energy

David Starling, chief executive, Kansas City Southern

Patricia Woertz, chief executive, Archer Daniels Midland

(Reporting by Jeff Mason; Editing by Paul Simao)

Source: http://news.yahoo.com/obama-meet-business-executives-ahead-central-american-trip-005605086.html

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East London Tech City Startups To Get Access To Network Of 4G Hotspots In June

east-london-06The Tech City high tech cluster in London's East End is getting an extra helping of high speed mobile connectivity from June. Carrier EE, which owns and operates the U.K.'s first and still only LTE/4G network, has announced it is partnering with the area's quango, the Tech City Investment Organisation, to install a network of 4G hotspots in "key locations" for businesses in the area to use.

Source: http://feedproxy.google.com/~r/Techcrunch/~3/L4BVVGzfMPw/

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After Raising $6.7M For Startups And Winning SEC Approval, AngelList Opens Up Investment Platform To More Companies

angellist-1In December, AngelList, a service that matches early stage startups with investors, debuted the ability to allow accredited investors to actually invest in startups on the platform with as little as $1,000. AngelList also partnered with SecondMarket to create an investment vehicle for these investments. Since December, the company is announcing that it has seen 1,100 investment commitments completely online, totaling over $6 million in funding for startups raising via AngelList. And today, AngelList is opening the platform up to all startups with top-tier investors.

Source: http://feedproxy.google.com/~r/Techcrunch/~3/i5OXA8avxcE/

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Four Realistic Ways to Cut Your Commuting Costs

Last week as I pulled into the gas station, I felt a series of heart palpitations as I read the prices of gas: $4.09, $4.19, $4.29. While I realize this is lower than some people are currently paying in other parts of the country, I couldn?t help but think of the millions of people who are working, in part, simply to pay for the ?luxury? of driving to and from their workplace.

This is a guest post from Quizzle.com.

My guess is that all of us are working for our paycheck for many reasons?none of which include simply handing over a good chunk of it to the gas station. But if you?re stuck with a daunting commute that necessitates multiple fill-ups each month, what can you do to reduce your commuting costs?

Here are some of the methods I?ve employed to drastically cut commuting costs over the years:

Change Your Work Hours

If you?re not working a traditional shift job and you have some flexibility with your scheduling (or an understanding boss), consider negotiating alternate hours outside of the 9-5. Perhaps you could try coming in early and leaving early or coming in late and leaving late (ideally, it?s not coming in early and leaving late!). By switching up your hours, you could avoid a lot of traffic?especially stop and go traffic which absolutely kills your gas mileage.

Partner Up

Carpooling is a great way to save money, be social, and reduce the chance of driving-induced stress (yes, I?m talking about road rage here, people). Even if you only commit to carpooling two days/week, you can reduce your costs for gas as well as the wear and tear on your vehicle.

If you?re thinking about carpooling, reach out to some close co-workers, solicit options via company message boards and email lists, or make an appointment with your HR rep to see what you can do to set up a car/ride sharing program at your work.

Travel With the Masses

I?ll be the first one to admit that I hate public transit?especially during rush hour. The packed trains and disgruntled passengers can leave a lot to be desired, but it?s a phenomenal way to save money on your commuting expenses.

If you live in an urban area, chances are your employer may participate in a reduced fare program. I?ve taken advantage of such a deal through my part-time job as I pay a mere $32/month for an unlimited bus/subway pass thanks to my employer?s generous subsidy. When I think of the hundreds I save each year, those minor hassles with the crowded trains are a bit more palatable.

Consider Radical Alternatives

If none of these options appeal to you or aren?t feasible for your situation, consider a more radical approach. This could mean forgoing the car altogether in favor of a bicycle, petitioning to work from home more often, or it could go as far as changing jobs.

Realistic Ways to Cut Your Commuting Costs | Quizzle


For more tips and tools to help you manage your home, money and credit?including the most affordable credit monitoring on the web and complete identity theft protection?visit Quizzle.com. Quizzle is a website that provides you with important information about your credit?starting with your credit report and credit score?as well as the tools you need to improve or monitor it, so you can make smart financial decisions. They also show you how your credit impacts your personal finances and give you personalized tips and tools to help you manage it all.

Image remixed from Sergey Peterman (Shutterstock), Next Please Stop (Flickr), and Teosaurio (Flickr).

Want to see your work on Lifehacker? Email Tessa.

Source: http://feeds.gawker.com/~r/lifehacker/full/~3/ahf1GkjbaEs/four-realistic-ways-to-cut-your-commuting-costs-479728266

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Thursday, April 25, 2013

Nanowires grown on graphene have surprising structure

Wednesday, April 24, 2013

When a team of University of Illinois engineers set out to grow nanowires of a compound semiconductor on top of a sheet of graphene, they did not expect to discover a new paradigm of epitaxy.

The self-assembled wires have a core of one composition and an outer layer of another, a desired trait for many advanced electronics applications. Led by professor Xiuling Li, in collaboration with professors Eric Pop and Joseph Lyding, all professors of electrical and computer engineering, the team published its findings in the journal Nano Letters.

Nanowires, tiny strings of semiconductor material, have great potential for applications in transistors, solar cells, lasers, sensors and more.

"Nanowires are really the major building blocks of future nano-devices," said postdoctoral researcher Parsian Mohseni, first author of the study. "Nanowires are components that can be used, based on what material you grow them out of, for any functional electronics application."

Li's group uses a method called van der Waals epitaxy to grow nanowires from the bottom up on a flat substrate of semiconductor materials, such as silicon. The nanowires are made of a class of materials called III-V (three-five), compound semiconductors that hold particular promise for applications involving light, such as solar cells or lasers.

The group previously reported growing III-V nanowires on silicon. While silicon is the most widely used material in devices, it has a number of shortcomings. Now, the group has grown nanowires of the material indium gallium arsenide (InGaAs) on a sheet of graphene, a 1-atom-thick sheet of carbon with exceptional physical and conductive properties.

Thanks to its thinness, graphene is flexible, while silicon is rigid and brittle. It also conducts like a metal, allowing for direct electrical contact to the nanowires. Furthermore, it is inexpensive, flaked off from a block of graphite or grown from carbon gases.

"One of the reasons we want to grow on graphene is to stay away from thick and expensive substrates," Mohseni said. "About 80 percent of the manufacturing cost of a conventional solar cell comes from the substrate itself. We've done away with that by just using graphene. Not only are there inherent cost benefits, we're also introducing functionality that a typical substrate doesn't have."

The researchers pump gases containing gallium, indium and arsenic into a chamber with a graphene sheet. The nanowires self-assemble, growing by themselves into a dense carpet of vertical wires across the surface of the graphene. Other groups have grown nanowires on graphene with compound semiconductors that only have two elements, but by using three elements, the Illinois group made a unique finding: The InGaAs wires grown on graphene spontaneously segregate into an indium arsenide (InAs) core with an InGaAs shell around the outside of the wire.

"This is unexpected," Li said. "A lot of devices require a core-shell architecture. Normally you grow the core in one growth condition and change conditions to grow the shell on the outside. This is spontaneous, done in one step. The other good thing is that since it's a spontaneous segregation, it produces a perfect interface."

So what causes this spontaneous core-shell structure? By coincidence, the distance between atoms in a crystal of InAs is nearly the same as the distance between whole numbers of carbon atoms in a sheet of graphene. So, when the gases are piped into the chamber and the material begins to crystallize, InAs settles into place on the graphene, a near-perfect fit, while the gallium compound settles on the outside of the wires. This was unexpected, because normally, with van der Waals epitaxy, the respective crystal structures of the material and the substrate are not supposed to matter.

"We didn't expect it, but once we saw it, it made sense," Mohseni said.

In addition, by tuning the ratio of gallium to indium in the semiconductor cocktail, the researchers can tune the optical and conductive properties of the nanowires.

Next, Li's group plans to make solar cells and other optoelectronic devices with their graphene-grown nanowires. Thanks to both the wires' ternary composition and graphene's flexibility and conductivity, Li hopes to integrate the wires in a broad spectrum of applications.

"We basically discovered a new phenomenon that confirms that registry does count in van der Waals epitaxy," Li said.

###

University of Illinois at Urbana-Champaign: http://www.uiuc.edu

Thanks to University of Illinois at Urbana-Champaign for this article.

This press release was posted to serve as a topic for discussion. Please comment below. We try our best to only post press releases that are associated with peer reviewed scientific literature. Critical discussions of the research are appreciated. If you need help finding a link to the original article, please contact us on twitter or via e-mail.

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Source: http://www.labspaces.net/127884/Nanowires_grown_on_graphene_have_surprising_structure

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Space Archaeologists Call for Preserving Off-Earth Artifacts

When it comes to preserving history, a group of archaeologists and historians are hoping to boldly go where no archaeologist has gone before.

Researchers are increasingly urging humanity to protect off-Earth cultural resources. That may well mean preserving NASA's Apollo landing sites on the moon as national historic landmarks, regarding far-flung spacecraft as mobile artifacts and even working to preserve some pieces of space junk.

"The cultural landscape of space includes both sites and objects on and off Earth," said Beth O'Leary, an associate professor of anthropology at the University of New Mexico in Las Cruces. "It is necessary to evaluate the significance of the latter and treat them as important objects and places worthy of legitimate archaeological inquiry." [Historic Apollo Moon Landers Found! (Photos)]

O'Leary spearheaded a NASA-funded effort to make the 1969 Apollo 11 lunar landing site a national historic landmark. She and other experts in the emerging field of space archaeology gathered at the annual meeting of the Society for American Archaeology (SAA), held April 3-7 in Honolulu.

Legitimate archaeological inquiry

O'Leary and Lisa Westwood of California State University, Chico co-chaired the SAA session on space archaeology. The field seeks to scrutinize the routes for preservation of space objects and places.

Westwood said that in 1972 ? near the end of the Apollo program ? the General Conference of the United Nations Educational, Scientific, and Cultural Organization (UNESCO) adopted the World Heritage Convention in a pioneering effort to protect universally important monuments, buildings, archaeological sites,and natural and cultural landscapes from being depleted.

"At that time and within that context, cultural heritage was defined by its location relative to then-current political boundaries on Earth. We now can broaden that view to encompass many other historic properties on Earth, on the moon and beyond," Westwood said.

In applying a cultural landscape approach to early space exploration heritage, she asked: Is it possible to designate a World Heritage List district of sites and properties that spans not only multiple countries, but planetary bodies as well?

Historic preservation

"I am a preservationist trying to protect a human archeological site 233,000 miles away," said Joe Reynolds of Clemson University in South Carolina. He detailed his analysis of international space law and how it affects historic preservation.

From 1969 to 1972, NASA's Apollo astronauts completed six separate lunar landing missions, "creating historically significant sites that now sit frozen in the lunar desert," Reynolds said.

Protection of lunar sites is complicated by the Outer Space Treaty of 1967, which prohibits countries from exercising territorial sovereignty over the moon or other celestial bodies.

Reynolds reviewed international treaties, such as those governing the ocean floor, Antarctica and the heavens. He also examined the language of the World Heritage Convention, the Geneva Convention, the National Historic Preservation Act of 1966, The Antiquities Act of 1906 and various state preservation laws.

"The Apollo 11 Lunar Landing Site can be legally protected," Reynolds said. "What my colleagues and I are trying to accomplish is to legally protect a site of unprecedented human achievement on land that cannot be owned by anyone."

Conserve and protect base camps

According to Reynolds, legal protection of historic or culturally significant sites on land not claimed by any nation is not unprecedented. "There are areas on Earth that share the designation of Res Communis with the moon, such as international waters and the Antarctic continent, and there are a few examples of preservation in those areas," he said.

One example Reynolds cited is the New Zealand Antarctic Heritage Trust. Created in 1987, NZAHT is focused on conserving and protecting the base camps for the four major Antarctic explorations of the early 20th century.

"The Apollo 11 Lunar Landing Site is similar to the camps protected by the NZAHT because at the most basic level, the objects left on the moon are more or less just another base camp, for another historic scientific expedition, on land that cannot be owned by anyone," Reynolds said.

The objects left on the moon by Apollo 11 moonwalkers Neil Armstrong and Buzz Aldrin are U.S. government property. Ownership of those objects has never been relinquished.

"This makes the legal protection of these objects a very simple classroom exercise," Reynolds said. "However, getting Congress to agree to it ? or anything these days ? is another story. One of the reasons for a lack of action to protect this site on the moon may be because it could be construed as a claim of sovereignty on the lunar surface."

Pinnacle of American bravado

Reynolds thinks the Apollo 11 Lunar Landing Site could become a national monument with the stroke of a U.S. president's pen. The Antiquities Act of 1906, he said, gives the president the power to create national monuments via executive order.

Congress could also allow for the protection of the site by passing the Tranquility Base National Historic Landmark Act, written by Reynolds' colleagues Westwood and O'Leary.

The Apollo moon landing sites should be included as national historic landmarks, Reynolds said, because they may represent "the pinnacle of American bravado ... [the] physical manifestation of that innovation, hope and discovery. That is why the U.S. should preserve these sites," he concluded.

Robot avatars

Nearer to planet Earth, Alice Gorman of Flinders University in Australia sees cultural value in orbiting space junk.

There are thousands of defunct satellites, rocket bodies and other pieces of junk currently in Earth orbit. Gorman called this cloud "a robotic colonial frontier" that reflects the nature of our social and political interactions with space and adaptations to a new environment. [Worst Space Debris Events of All Time]

But unlike terrestrial artifacts, orbiting objects are barely visible to us and are not designed to interact with human bodies (with a few notable exceptions, such as the International Space Station)..

"They may represent the beginnings of a technological trajectory that will transform how human cultures relate to time and space," Gorman said.

Representatives of Homo sapiens

In a session at the SAA conference, Peter Capelotti of Penn State University reviewed dead or soon-to-be dead interplanetary spacecraft.

Capelotti noted that space probes navigating the boundaries between our solar system and interstellar space seem to represent "whole new categories of archaeological methodology ... if we are to consider the possibilities of heritage, preservation and, eventually, fieldwork."

For example, NASA's far-flung Pioneer 10, Pioneer 11, Voyager 1, Voyager 2 and New Horizons probes will "eventually enter interstellar space and become the archaeological representatives of Homo sapiens to the rest of the galaxy," Capelotti said.

Once a spacecraft no longer responds to signals from Earth, it ceases to be used for the original mission for which it was designed, and becomes instead a discarded, and hence, archaeological, object, Capelotti said.

Leonard David has been reporting on the space industry for more than five decades. He is former director of research for the National Commission on Space and is co-author of Buzz Aldrin?s new book ?Mission to Mars ? My Vision for Space Exploration? out in May from National Geographic.?Follow us?@Spacedotcom,?Facebook?or?Google+. Originally published on?SPACE.com.

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

Source: http://news.yahoo.com/space-archaeologists-call-preserving-off-earth-artifacts-161737198.html

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Wednesday, April 24, 2013

Scientists map all possible drug-like chemical compounds

Tuesday, April 23, 2013

Drug developers may have a new tool to search for more effective medications and new materials.

It's a computer algorithm that can model and catalogue the entire set of lightweight, carbon-containing molecules that chemists could feasibly create in a lab.

The small-molecule universe has more than 10^60 (that's 1 with 60 zeroes after it) chemical structures. Duke chemist David Beratan said that many of the world's problems have molecular solutions in this chemical space, whether it's a cure for disease or a new material to capture sunlight.

But, he said, "The small-molecule universe is astronomical in size. When we search it for new molecular solutions, we are lost. We don't know which way to look."

To give synthetic chemists better directions in their molecular search, Beratan and his colleagues -- Duke chemist Weitao Yang, postdoctoral associates Aaron Virshup and Julia Contreras-Garcia, and University of Pittsburgh chemist Peter Wipf -- designed a new computer algorithm to map the small-molecule universe.

The map, developed with a National Institutes of Health P50 Center grant, tells scientists where the unexplored regions of the chemical space are and how to build structures to get there. A paper describing the algorithm and map appeared online in April in the Journal of the American Chemical Society.

The map helps chemists because they do not yet have the tools, time or money to synthesize all 10^60 compounds in the small-molecule universe. Synthetic chemists can only make a few hundred or a few thousand molecules at a time, so they have to carefully choose which compounds to build, Beratan said.

The scientists already have a digital library describing about a billion molecules found in the small-molecule universe, and they have synthesized about 100 million compounds over the course of human history, Beratan said. But these molecules are similar in structure and come from the same regions of the small-molecule universe.

It's the unexplored regions that could hold molecular solutions to some of the world's most vexing challenges, Beratan said.

To add diversity and explore new regions to the chemical space, Aaron Virshup developed a computer algorithm that built a virtual library of 9 million molecules with compounds representing every region of the small-molecule universe.

"The idea was to start with a simple molecule and make random changes, so you add a carbon, change a double bond to a single bond, add a nitrogen. By doing that over and over again, you can get to any molecule you can think of," Virshup said.

He programed the new algorithm to make small, random chemical changes to the structure of benzene and then to catalogue the new molecules it created based on where they fit into the map of the small-molecule universe. The challenge, Virshup said, came in identifying which new chemical compounds chemists could actually create in a lab.

Virshup sent his early drafts of the algorithm's newly constructed molecules to synthetic chemists who scribbled on them in red ink to show whether they were synthetically unstable or unrealistic. He then turned the criticisms into rules the algorithm had to follow so it would not make those types of compounds again.

"The rules kept us from getting lost in the chemical space," he said.

After ten iterations, the algorithm finally produced 9 million synthesizable molecules representing every region of the small-molecule universe, and it produced a map showing the regions of the chemical space where scientists have not yet synthesized any compounds.

"With the map, we can tell chemists, if you can synthesize a new molecule in this region of space, you have made a new type of compound," Virshup said. "It's an intellectual property issue. If you're in the blank spaces on our small molecule map, you're guaranteed to make something that isn't patented yet," he said.

The team has made the source code for the algorithm available online. The researchers said they hope scientists will use it to immediately start mining the unexplored regions of the small molecule universe for new chemical compounds.

###

Duke University: http://www.duke.edu

Thanks to Duke University for this article.

This press release was posted to serve as a topic for discussion. Please comment below. We try our best to only post press releases that are associated with peer reviewed scientific literature. Critical discussions of the research are appreciated. If you need help finding a link to the original article, please contact us on twitter or via e-mail.

This press release has been viewed 62 time(s).

Source: http://www.labspaces.net/127863/Scientists_map_all_possible_drug_like_chemical_compounds

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Amgen 1Q profit rises 21 percent on drug sales

(AP) ? Biotech giant Amgen Inc. says its first-quarter profit rose 21 percent on higher sales of drugs to treat arthritis and osteoporosis.

The company on Tuesday reported net income of $1.43 billion, or $1.88 per share, from $1.18 billion, or $1.48 per share, in the prior-year period. Adjusted earnings were $1.96 per share.

Revenue rose 5 percent, to $4.24 billion.

Analysts polled by FactSet expect earnings per share of $1.84 on sales of $4.37 billion.

Sales of the Thousand Oaks, Calif., company's biotech drugs were driven by growth of Enbrel for psoriasis and rheumatoid arthritis and Prolia for osteoporosis.

Sales of anemia drugs Aranesp and Epogen continued their long slide due to limits on dosing and reimbursement because of safety concerns.

Shares are off 4.7 percent to $107.42 in after-hours trading.

Associated Press

Source: http://hosted2.ap.org/APDEFAULT/f70471f764144b2fab526d39972d37b3/Article_2013-04-23-Earns-Amgen/id-6e8ada0d5bfa4412b040cc5e296d617e

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Will.i.am Admits "Let's Go" Beat Stolen From Arty & Mat Zo!

Source: http://www.thehollywoodgossip.com/2013/04/william-lets-go-beat-actually-stolen-from-arty-and-mat-zo/

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'Vanilla Ice Goes Amish' to debut on DIY this year

NEW YORK (AP) ? The DIY television network is proving a comfortable home for rappers turned renovators.

"Vanilla Ice Goes Amish" will debut on the network this year. Network executive Burton Jablin says the former rap star will live with an Amish community in Ohio to learn how they do construction. Vanilla Ice already has a renovation series on the network that will return for its fourth season this fall.

Reverend Run of Run DMC will have a series next year starring with his wife and three children as they renovate their home.

Keeping with the music theme, DIY will also feature Daryl Hall next year as he renovates a farmhouse in Connecticut.

Source: http://news.yahoo.com/vanilla-ice-goes-amish-debut-diy-183523526.html

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More rain expected for already swollen Midwest rivers

CLARKSVILLE, Mo. (AP) ? Communities along the Mississippi River and other Midwestern waterways are vigilantly eyeing ? and in some cases hastily fortifying ? makeshift levees to hold back floodwaters that meteorologists say could worsen or be prolonged by looming storms.

An inch of rain was expected to fall from Oklahoma to Michigan through Tuesday, a new drenching that led the National Weather Service to heighten the forecast crest of some stretches of rivers while blunting the progress of other waterways' slow retreat.

Mark Fuchs, a National Weather Service hydrologist, said the latest dousing could be especially troubling for communities along the Illinois River, which he said is headed for record crests.

"Along the Illinois, any increase is going to be cause for alarm, adding to their uncertainty and, in some cases, misery," he said late Monday afternoon.

Last week's downpours brought on sudden flooding throughout the Midwest, and high water is blamed for at least three deaths. Authorities in LaSalle, Ill., spent Monday searching for a woman whose van was spotted days earlier near a bridge, and a 12-year-old boy was in critical condition after being pulled from a river near Leadwood, Mo., about 65 miles south of St. Louis.

The additional rain isn't welcome news in Clarksville, Mo., about 70 miles north of St. Louis.

Days after bused-in prison inmates worked shoulder to shoulder with the National Guard and local volunteers to build a makeshift floodwall of sand and gravel, the barrier showed signs of strain Monday. Crews scrambled to patch trouble spots and build a second sandbag wall to catch any water weaseling through.

In Grafton, Ill., some 40 miles northeast of St. Louis, Mayor Tom Thompson said small community was holding its own against the Mississippi that by early Monday afternoon was 10 feet above flood stage. Waters lapped against some downtown buildings, forcing shops such as Hawg Pit BBQ to clear out and detours to be put up around town ? one key intersection was under 8 inches of water.

"If it gets another foot (higher), it's going to become another issue," Thompson said. Many businesses "are kinda watching and holding their breath. ... Some things are going to really be close to the wire."

Elsewhere, smaller rivers caused big problems. In Grand Rapids, Mich., the Grand River hit a record 21.85 feet, driving hundreds of people from their homes and flooding parts of downtown.

Spots south of St. Louis aren't expected to crest until late this week, and significant flooding is possible in places like Ste. Genevieve, Mo., Cape Girardeau, Mo., and Cairo, Ill. Further downriver, flood warnings have been issued for Kentucky and Tennessee.

___

Salter reported from St. Louis.

Source: http://news.yahoo.com/more-rain-expected-already-swollen-rivers-070400840.html

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Monday, March 11, 2013

Coming Up With An Ecommerce Venture Would Be Profitable?

Facing the current economic situation, a considerable number of people worldwide have decided to do their own small businesses online to support themselves and their families for economic balance and development. They are persistently struggling to forge new and innovative business setups to establish a reliable financial fort. ?Setting up an ecommerce you have to expend a very little amount compared to running a physical store. Also, it goes without saying that Internet is a place of freedom globally for all kinds of business. And this global business process what we called ecommerce business which can come from a startup to a well established business and from small to medium and large businesses.

2009 was surely a year of global recession in terms of unemployment, purchaser credence and general uncertainty prevalent, and many other economical disorders consequently. In spite of that, by negating the power of recession, ecommerce succeeded in and build as a best industry with 11% of economic growth rate ( equivalent to $ 155.2 billion) in that year. ?When the economic indicators were getting downward in 2009 this ecommerce business idea bring out a huge success considering that. Subsequently, the economic sales grew at a rate of 14.8% in to the U.S Commerce Department2010. According, online purchasers spent $ 165.4 billion in 2010. The pace at which the online retail sales are going on is indeed astonishing, and continues to grow as more and more people shift to the E-business paradigm.Ecommerce Business IDea

According to a report, ?U.S Online Retail Forecast 2009 to 2014?, Forrester Research states that ?growth in online retail sales will continue to surpass the growth in offline retail sales, as low prices, convenience, and selection drive more shoppers online?. The report takes a look at the years from 2009 to 2014 and gives prediction for potential growth in ecommerce sales over the five years which includes the next to follow. The 2009 statistics of online consumers was observed to be 154 million, which made 67% of the overall number of online users. The rate was expected to grow 10 % annually the following year. But the number of online purchases was equivalent to $ 164.6 billion and corresponded to 4.2% of the total retail sales. This indicated a 7% rise from the sales in 2009.

According to Forrester?s Report, the online retail sales were expected to grow at a rate of 10% annually from 2009-2014, and the same statistical result is awaited over the next year. It is predicted that the number of online sales will grow to $ 250 billion by 2014. ?In another report, 162.6 million people in the U.S are predicted to buy products and services online, in 2014.

Though the online retail sales are not growing at the speedy rate they once were, but they keep growing on gradually. Forrester is relatively more hopeful about the rise of online retail sales in Western Europe, as of 2014. He expects an 11% growth rate, with an increment of $ 93 billion in 2009 to $156 billion in 2014.? That makes online retail sales worth of 68 billion Euros in 2009 convert to $114.5 billion Euros in 2014. Online sales of prescription drugs, autos and tours are not part of Forrester?s calculations, however.

Other estimates regarding the U.S online sales forecast tell that:

  • Three product types namely:? Computers, clothing, mobile phones and other consumer electronics contributed to more than 44% of online sales in 2009.
  • By 2014, online purchases will represent 8% of the overall retail industry sales in the U.S; making a rise of 6% from the sales incurred in 2009.
  • 42% of the total retail sales including the online and web influenced offline sales were achieved in 2009. This equals to retail sales worth of $ 917 billion in 2009, according to Forrester report. By 2014, the rate is expected to grow up to 53% of retail sales. Till then the web is expected to influence in-store sales reaching to $ 1.4 billion approximately.
  • 70% of the online users in U.S do a proper research about the products on the Internet before they seek out to buy them in offline stores.

More data given here, have a look:

  • In spite of the recession, the UK e-retail market is currently growing at 16% per annul
  • In the UK, the ecommerce market provides employment for over 730,000 people
  • Every year more than one billion parcels are shipped from online purchases from UK
  • 59% of SME?s offers eCommerce services report that international eCommerce was in a driver seat in their decision to sell online products
  • Of SMEs current offer in ?eCommerce, a quarter show that the transactions of overseas make up 30-40% of income
  • 74% of currently offline SMEs planning to offer eCommerce transactions within ?the next six months
  • Beyond the UK, ?78% of these businesses motivated by the selling potential these data collected from Global Exports.

Now have a check about table point about ecommerce sales statistics:

Sales Year U.S. Online Sales
2012 (Q1) $50,270,000,000
2011 $255,600,000,000
2010 $172,900,000,000
2009 $155,200,000,000
Year Global Online Sales
2011 $763,200,000,000
2010 $680,600,000,000

Now have a look on online statistics about the customer buying choice:

Online Shopping Statistics Percentage of user
User who have made an internet purchase 83 %
User who have made a purchase multiple times 56%
Retail sales percentage that are made online 8%

Resource collected from Statistics Brain.

Business Prediction

Some Interesting Statistics for Ecommerce Entrepreneur:

E-commerce of the U.S. sales reached $56.99 billion the third quarter up 17.3% from $48.59 billion for the same period a year ago, according to figures released today by the U.S. Commerce department. Now have a look on the third quarter, 2011 e-commerce sales increased 3.7% from $54.94 billion in the second quarter and the statistics figure out to the department?s seasonally adjusted estimates.

When e-retail sales growth hovered just above 15%, the 17.3% growth posted for the third quarter that follows three quarters. When growth clocked in at 17.2%, the last time e-commerce sales growth was greater than 17% that seemed in the 2011?s first quarter. Source : Internet Trailer

As more and more purchasers are expected to spend considerably online in the future, the key growth drivers of Ecommerce businesses include:

Offline sales Cannibalization

There are as many as 161 million purchasers who prefer to spend a greater part of their budget using the web channel, annually. In a report, most of the online retail sales were escalated during the significant holiday season such as, Thanksgiving, ?when majority found online shops a great deal of help rather than visiting stores.

Great variety of merchandise

?The Ecommerce business gives way to a wide variety of products and services you can choose from. Two types of retailers exist in the web market:? Manufacturers who know how to provide a complete product catalog that cannot be provided or maintained by other retailer companies, and others are the small companies who sell unique collection and offerings, and make full use of strong site merchandising and excellent page layouts to drive more traffic, increase the number of purchases and drive sales.

Universal accessibility

Internet can be accessed from any part of the world, at any time. It allows cross channel communication and allows people to perform different activities as conveniently as possible; from social networking to online business, from buying and selling products/services online to communicating with your distant loved ones and much more. According to a survey, the continued increment in online shopping attributes to the use of Tablet PCs and Smart phones for mobile shopping.

New and improved commerce models

The introduction of new business models like daily deal sites and flash sites provide convenient ways for online users to buy more frequently online.? The ?limited offer? model, ?digital media content downloads ?model and others are likely to turn the offline shopping trends downwards in the near future.

Hundreds of thousands of companies have started their online businesses, whether they are new to the business world or have already gained experience; so as to secure their financial life.

Source: http://devsteam.com/coming-up-with-an-ecommerce-venture-would-be-profitable

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Offer Your Residence On a Finances With These Successful Tips ...

Avoid feeling discouraged if you are faced with home selling on a small budget. If your home needs a lot of repairs, then you know that you cannot get all of them done. Just accept the reality of the situation and move forward. Supposing that selling your home is the most critical thing, than you can take care of some of the things that cost money. It follows that a brighter note would be that you can spend little to nothing and get a lot of repairs done that will make a positive impression. You would be flabbergasted at all the things you can get done with very little money. With that out of the way, you need to start determining the things that matter the most, when showing your home.

Unfortunately when a lot of folks are thinking about placing their home on the market; they are unable to find the funding needed to bring it up to quality standards. Keep the faith and just try to stay inside the parameters that are in your means. You will see all sorts of areas you can treat within your budget. It may be a good idea to talk to your real estate agent. Your real estate agent works with those who have certain demands everyday and will be able to relay those thoughts on to you. You have probably heard that the kitchen is one particular area that often takes priority over other areas. Remember that the bathroom is the room that will be the least captivating. This is correct, except when there is something drastically awful.

Realtors say that if you present something in the color yellow, it will add an upbeat appearance to your home. As you would imagine, this adds an upbeat, lighthearted effect that feels homey. Figure out how to make this addition viewable for passersby. The appearance of your home from the street is extremely critical. You can enhance the look with an item as fundamental as a pot of yellow flowers resting by your front door. Another suggestion would be to hang a wreath with yellow flowers amongst it. You get the idea and use your creativity and have a little fun with it.

As you can plainly see, what you will find out about home selling is some points are far more important than others. Nevertheless, the bottom line is how you want to use it, and how much of it will effect your situation. Yet you do realize there is much more to be discovered about this. We are keeping the best for last, and you will be delighted at what you will find out. Even after what is next, we will not quit there because the best is yet to come.

Another area that can be a deciding factor as to whether someone is interested in buying your home ? or not ? is the impression they get when they look at your bathrooms. If you have glass shower doors, undoubtedly they have a lime build up on them that results from use over a period of time. Go to your home improvement center and buy a lime remover. After using it, your shower doors will sparkle like new. Sometimes bath tubs will develop stains that are nearly impossible to get out. Buying a new bathtub usually isn?t an option, but a viable solution is to have the surface of the tub refinished. Not everyone is familiar with this process, but it?s not hard to find a company that does this kind of work. Potential buyers don?t spend a lot of time inspecting the bathrooms, so if yours appears clean and well-cared for, they might just do a cursory glance and then move on.

When you have the ability and creativity to improve some of the features of your home; it won?t be that expensive to make it appealing to a potential buyer. It is important to realize where you need to augment the appearance of your home to appeal to an interested party. You are now ready and know what it will take to make your home appealing to those who are looking to buy.

The author is an internet marketing and advertising specialist who writes on varied real estate subjects similar to ? Orlando real estate for sale, Tampa FL real estate and Tampa foreclosures.

Source: http://robertwatson.holdonhosting.net/offer-your-residence-on-a-finances-with-these-successful-tips/

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Sunday, March 10, 2013

Suicide bomb hits Kabul as U.S. defense chief visits

KABUL, Afghanistan (AP) ? A suicide bomber on a bicycle struck outside the Afghan Defense Ministry on Saturday, one of two attacks that killed at least 18 people as U.S. Defense Secretary Chuck Hagel visited the nation, officials said.

Nine people were killed in the bombing at the ministry, a fresh reminder that insurgents continue to fight and challenges remain as the U.S.-led NATO force hands over the country's security to the Afghans.

About a half hour later, another suicide bomber attacked a police checkpoint in Khost, the capital of Khost province in eastern Afghanistan. An Afghan policeman and eight civilians, who were mostly children, died in that blast, said provincial spokesman Baryalai Wakman.

"We are still at war," Hagel said after he arrived on Friday, the same day that three men wearing Afghan army uniforms and driving an Afghan army vehicle forced their way onto a U.S. base in eastern Afghanistan and opened fire, killing one civilian contractor and wounding other U.S. troops.

The Taliban claimed responsibility for the morning attack at the ministry, saying it was meant to send a signal to the U.S. defense chief. "This attack was a message to him," Taliban spokesman Zabiullah Mujahid said in an email to reporters.

Pentagon spokesman George Little said Hagel was in a briefing at a U.S.-led military coalition facility in another part of the city when the explosion occurred. He said the briefing continued without interruption.

Afghan Defense Ministry spokesman Gen. Mohammad Zahir Azimi said the bomber on a bicycle struck just before 9 a.m. local time about 30 meters (yards) from the main gate of the ministry.

A man at the scene, Abdul Ghafoor, said the blast rocked the entire area.

"I saw dead bodies and wounded victims lying everywhere," Ghafoor told AP Television News. "Then random shooting started and we escaped from the area."

The ministry said at least nine civilians were killed and others were wounded.

Reporters traveling with Hagel were in a briefing when they heard the explosion. They were moved to a lower floor of the same building as U.S. facilities in downtown Kabul were locked down as a security precaution.

___

Associated Press writers Lolita C. Baldor and Heidi Vogt contributed to this report from Kabul.

Source: http://news.yahoo.com/suicide-bomb-hits-kabul-us-defense-chief-visits-060335256.html

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Saturday, March 9, 2013

Transfer of US prison to Afghans delayed again

KABUL, Afghanistan (AP) ? The long-awaited transfer of the U.S. detention center in Afghanistan was delayed once again Saturday after a deal struck between the two governments broke down before the planned handover ceremony.

The delay suggests that the two sides have yet to resolve thorny issues such as whether Afghans can be held without trial and whether the U.S. will have the power to block the release of detainees it considers particularly dangerous. It also throws a pall over ongoing negotiations for a bilateral security agreement that would govern the presence of U.S. forces in Afghanistan after the current combat mission ends in 2014.

As recently as Friday morning, Afghan workers at the Defense Ministry were arranging transport for dignitaries and journalists to attend Saturday's ceremony at the detention center adjoining the Bagram Air Field, a U.S. base about an hour outside of the capital. The Parwan Detention Center houses Afghans and some foreigners picked up by U.S. forces.

Currently, there is an Afghan administrator of the prison, but the Americans have power to veto the release of detainees. The prisoners held under American authority do not have the right to a trial because the U.S. considers them detainees held as part of an ongoing conflict.

Then on Saturday morning, organizers told journalists that the ceremony had been canceled without giving a reason.

U.S. military officials said the ceremony was called off because they could not finalize the agreement with the Afghans.

"We continue to work out the details on the transfer of the Detention Facility in Parwan to the government of the Islamic Republic of Afghanistan," Jamie Graybeal, a spokesman for the U.S. military in Afghanistan, said in an email. He said that the U.S. remains committed to transferring the facility and all Afghan detainees.

"We intend to proceed with the transfer once we have reached full agreement," Graybeal said.

Afghan President Hamid Karzai met with U.S. commander Gen. Joseph Dunford late Saturday on the issue and Karzai's office said that they fully expect all the details to be worked out so that the transfer ceremony can be rescheduled for the coming week.

"Details will include respect for the national sovereignty of Afghanistan in the detention facility, and all technical and legal rights of the detainees," Karzai's office said in a statement. The statement said that Dunford also committed to transferring authority for the prison during this coming week. Graybeal, the U.S. forces spokesman, said he did not have information on the meeting and could not confirm if Dunford had made such a commitment.

Source: http://news.yahoo.com/transfer-us-prison-afghans-delayed-again-055610552.html

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Long predicted atomic collapse state observed in graphene

Friday, March 8, 2013

The first experimental observation of a quantum mechanical phenomenon that was predicted nearly 70 years ago holds important implications for the future of graphene-based electronic devices. Working with microscopic artificial atomic nuclei fabricated on graphene, a collaboration of researchers led by scientists with the U.S. Department of Energy's Lawrence Berkeley National Laboratory (Berkeley Lab) and the University of California (UC) Berkeley have imaged the "atomic collapse" states theorized to occur around super-large atomic nuclei.

"Atomic collapse is one of the holy grails of graphene research, as well as a holy grail of atomic and nuclear physics," says Michael Crommie, a physicist who holds joint appointments with Berkeley Lab's Materials Sciences Division and UC Berkeley's Physics Department. "While this work represents a very nice confirmation of basic relativistic quantum mechanics predictions made many decades ago, it is also highly relevant for future nanoscale devices where electrical charge is concentrated into very small areas."

Crommie is the corresponding author of a paper describing this work in the journal Science. The paper is titled "Observing Atomic Collapse Resonances in Artificial Nuclei on Graphene." Co-authors are Yang Wang, Dillon Wong, Andrey Shytov, Victor Brar, Sangkook Choi, Qiong Wu, Hsin-Zon Tsai, William Regan, Alex Zettl, Roland Kawakami, Steven Louie, and Leonid Levitov.

Originating from the ideas of quantum mechanics pioneer Paul Dirac, atomic collapse theory holds that when the positive electrical charge of a super-heavy atomic nucleus surpasses a critical threshold, the resulting strong Coulomb field causes a negatively charged electron to populate a state where the electron spirals down to the nucleus and then spirals away again, emitting a positron (a positively?charged electron) in the process. This highly unusual electronic state is a significant departure from what happens in a typical atom, where electrons occupy stable circular orbits around the nucleus.

"Nuclear physicists have tried to observe atomic collapse for many decades, but they never unambiguously saw the effect because it is so hard to make and maintain the necessary super-large nuclei," Crommie says. "Graphene has given us the opportunity to see a condensed matter analog of this behavior, since the extraordinary relativistic nature of electrons in graphene yields a much smaller nuclear charge threshold for creating the special supercritical nuclei that will exhibit atomic collapse behavior."

Perhaps no other material is currently generating as much excitement for new electronic technologies as graphene, sheets of pure carbon just one atom thick through which electrons can freely race 100 times faster than they move through silicon. Electrons moving through graphene's two-dimensional layer of carbon atoms, which are arranged in a hexagonally patterned honeycomb lattice, perfectly mimic the behavior of highly relativistic charged particles with no mass. Superthin, superstrong, superflexible, and superfast as an electrical conductor, graphene has been touted as a potential wonder material for a host of electronic applications, starting with ultrafast transistors.

In recent years scientists predicted that highly-charged impurities in graphene should exhibit a unique electronic resonance ? a build-up of electrons partially localized in space and energy ? corresponding to the atomic collapse state of super-large atomic nuclei. Last summer Crommie's team set the stage for experimentally verifying this prediction by confirming that graphene's electrons in the vicinity of charged atoms follow the rules of relativistic quantum mechanics. However, the charge on the atoms in that study was not yet large enough to see the elusive atomic collapse.

"Those results, however, were encouraging and indicated that we should be able to see the same atomic physics with highly charged impurities in graphene as the atomic collapse physics predicted for isolated atoms with highly charged nuclei," Crommie says. "That is to say, we should see an electron exhibiting a semiclassical inward spiral trajectory and a novel quantum mechanical state that is partially electron-like near the nucleus and partially hole-like far from the nucleus. For graphene we talk about 'holes' instead of the positrons discussed by nuclear physicists."

To test this idea, Crommie and his research group used a specially equipped scanning tunneling microscope (STM) in ultra-high vacuum to construct, via atomic manipulation, artificial nuclei on the surface of a gated graphene device. The "nuclei" were actually clusters made up of pairs, or dimers, of calcium ions. With the STM, the researchers pushed calcium dimers together into a cluster, one by one, until the total charge in the cluster became supercritical. STM spectroscopy was then used to measure the spatial and energetic characteristics of the resulting atomic collapse electronic state around the supercritical impurity.

"The positively charged calcium dimers at the surface of graphene in our artificial nuclei played the same role that protons play in regular atomic nuclei," Crommie says. "By squeezing enough positive charge into a sufficiently small area, we were able to directly image how electrons behave around a nucleus as the nuclear charge is methodically increased from below the supercritical charge limit, where there is no atomic collapse, to above the supercritical charge limit, where atomic collapse occurs."

Observing atomic collapse physics in a condensed matter system is very different from observing it in a particle collider, Crommie says. Whereas in a particle collider the "smoking gun" evidence of atomic collapse is the emission of a positron from the supercritical nucleus, in a condensed matter system the smoking gun is the onset of a signature electronic state in the region nearby the supercritical nucleus. Crommie and his group observed this signature electronic state with artificial nuclei of three or more calcium dimers.

"The way in which we observe the atomic collapse state in condensed matter and think about it is quite different from how the nuclear and high-energy physicists think about it and how they have tried to observe it, but the heart of the physics is essentially the same," says Crommie.

If the immense promise of graphene-based electronic devices is to be fully realized, scientists and engineers will need to achieve a better understanding of phenomena such as this that involve the interactions of electrons with each other and with impurities in the material.

"Just as donor and acceptor states play a crucial role in understanding the behavior of conventional semiconductors, so too should atomic collapse states play a similar role in understanding the properties of defects and dopants in future graphene devices," Crommie says.

"Because atomic collapse states are the most highly localized electronic states possible in pristine graphene, they also present completely new opportunities for directly exploring and understanding electronic behavior in graphene."

###

DOE/Lawrence Berkeley National Laboratory: http://www.lbl.gov

Thanks to DOE/Lawrence Berkeley National Laboratory for this article.

This press release was posted to serve as a topic for discussion. Please comment below. We try our best to only post press releases that are associated with peer reviewed scientific literature. Critical discussions of the research are appreciated. If you need help finding a link to the original article, please contact us on twitter or via e-mail.

This press release has been viewed 74 time(s).

Source: http://www.labspaces.net/127212/Long_predicted_atomic_collapse_state_observed_in_graphene

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Video: DPS: Barkley a top 15 talent?

Sorry, Readability was unable to parse this page for content.

Source: http://nbcsports.msnbc.com/id/21134540/vp/51106008#51106008

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Friday, March 8, 2013

Whoa there! Quick switch to 'barefoot' shoes can be bad to the bone

Mar. 5, 2013 ? or the growing number of runners who are considering trying "barefoot" five-finger running shoes, researchers at BYU have a message for you: Take it slow!

A new study from a team of exercise science professors found that runners who transition too quickly to minimalist shoes suffer an increased risk of injury to bones in the foot, including possible stress fractures.

With minimalist shoes now making up 15 percent of the $6.5 billion running shoe market, the findings are nothing to run from.

"Transitioning to minimalist shoes is definitely stressful to the bones," said Sarah Ridge, study lead author and assistant professor of exercise science at BYU. "You have to be careful in how you transition and most people don't think about that; they just want to put the shoes on and go."

The research, appearing online ahead of print in the journal Medicine & Science in Sports & Exercise, studied 36 experienced runners over a 10-week period.

Each runner first underwent MRIs on their feet prior to the study period. Half of the runners were then asked to gradually transition into five-finger minimalist shoes while the other half continued to run in traditional running shoes.

Subjects in the experimental group followed an industry suggested protocol. They did one short (1-2 mile) run in the minimalist shoes the first week, and added an additional short run each week so that they ran at least 3 miles in the new shoes by week three. They were then told to add mileage in the minimal shoes as they felt comfortable, with the goal of replacing one short run per week in traditional shoes with the new shoes.

At the end of the 10-week period, MRIs were again conducted. The MRIs revealed that those who had transitioned to the minimalist shoes suffered greater increases in bone marrow edema (inflammation causing excessive fluid in the bone) and more stress injuries than those in traditional shoes.

"Whenever a bone is impacted by running (or some other repetitive action), it goes through a normal remodeling process to get stronger," Ridge said. "Injury occurs when the impact is coming too quickly or too powerfully, and the bone doesn't have a chance to properly remodel before impact reoccurs."

Interestingly, the study found the majority of those who suffered stress injuries were women.

Ridge and her coauthors, which include BYU exercise science faculty Wayne Johnson, Ulrike Mitchell and Iain Hunter, said the study does not mean minimalist shoes are bad.

Rather, to minimize the risk of injuries, runners should transition over a longer duration than 10 weeks and at a lower intensity (miles per week).

"People need to remember they've grown up their whole life wearing a certain type of running shoes and they need to give their muscles and bones time to make the change," Johnson said. "If you want to wear minimalist shoes, make sure you transition slowly."

This is the first of many studies looking at minimalist running shoes, the authors said. Over the next several months they plan to publish enough research to begin to establish clear recommendations for anyone considering making the switch.

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  1. Sarah T. Ridge, A.Wayne Johnson, Ulrike H. Mitchell, Iain Hunter, Eric Robinson, Brent S. E. Rich, Stephen Douglas Brown. Foot Bone Marrow Edema after 10-week Transition to Minimalist Running Shoes. Medicine & Science in Sports & Exercise, 2013; : 1 DOI: 10.1249/MSS.0b013e3182874769

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Ala. sheriff recounts final moments at bunker

FILE -- In this photo taken Feb. 8, 2013, authorities continue their investigation at the site in Midland City, Ala., where a five year old boy was held hostage in an underground bunker. Dale County Sheriff Wally Olson on Thursday, March 7, 2013 said officers stormed the bunker because the man had told them something "real, real bad" was going to happen if they didn't meet his demands. (AP Photo/Dave Martin, File)

FILE -- In this photo taken Feb. 8, 2013, authorities continue their investigation at the site in Midland City, Ala., where a five year old boy was held hostage in an underground bunker. Dale County Sheriff Wally Olson on Thursday, March 7, 2013 said officers stormed the bunker because the man had told them something "real, real bad" was going to happen if they didn't meet his demands. (AP Photo/Dave Martin, File)

(AP) ? An Alabama man who held a boy hostage in a bunker warned authorities some "very bad things" would happen if they didn't meet his demands, a sheriff said Thursday, shedding more light on the final moments of the standoff.

Dale County Sheriff Wally Olson said Jimmy Lee Dykes had two homemade explosives devices and authorities were worried he would set them off and kill the then-5-year-old boy. Officers raided the bunker Feb. 4 after a weeklong standoff and shot Dykes to death. The boy was rescued unharmed.

Olson said investigators still weren't sure of Dykes' motive.

"He kept saying he had a story that was very important to him and that he wanted to get out his story. But we've never been able to find out exactly what his story was. He would never really give us any insights into that," said Olson, who spoke to reporters after he gave a speech on gun legislation to lawmakers.

Investigators were reviewing writings found on Dykes' property to see if they offered any explanation into why he kidnapped the boy off a school bus Jan. 29, the sheriff said.

Dykes killed bus driver Charles Poland and took the child to an underground bunker near his mobile home. He had two explosive devices. One was set off in a PVC pipe but didn't harm anyone because authorities covered it with sandbags. The other device was more threatening, the sheriff said.

"If he had detonated that device, it would have killed him," Olson said of the boy. "We felt like his life was definitely in harm's way."

Dykes had been planning the event for weeks and became friendly with the bus driver, even clearing out a place close to his property where Poland could turn the bus around on the dead-end street.

Officers communicated with Dykes from the beginning by using the PVC pipe that led to the bunker. The sheriff said Dykes initially appeared focused on the child's safety, but that changed as the days passed and negotiations deteriorated.

He said Dykes gave officers a deadline to do things or else "some bad things would happen." The sheriff wouldn't say want those demands were.

Authorities, including the FBI and Alabama Bureau of Investigation, had developed different plans about what to do if that moment arrived, and they decided to act, he said.

The 40-year-old sheriff, who has two young daughters, said he handled the tense days with his children always on his mind.

"I don't want to look like a big boob and start crying. Now I do love my children, and I could only imagine what it would be like if that would have been my child. That's why I tried to do everything possible I could to make sure we had a safe return," he said.

Associated Press

Source: http://hosted2.ap.org/APDEFAULT/386c25518f464186bf7a2ac026580ce7/Article_2013-03-07-Alabama%20Bunker%20Standoff/id-7e70a24e28b74f05afb20570ddb75c9c

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