Archive for August, 2008

Doctors also at risk during surgery

Sunday, August 31st, 2008

Patients are not the only ones at risk during cardiac procedures; doctors also face health risks, especially radiation risk to their eyes.

The International Atomic Energy Agency (IAEA) is helping to raise awareness of threats, through training in radiation protection related to medical uses of X-ray imaging systems.

The issue of protection from radiation for doctors is particularly acute in the case of lengthy angioplasty and other cardiac interventions performed under X-ray fluoroscopic guidance.

Fluoroscopy provides X-ray images of a patient that physicians can view on a display screen or monitor in real time.

The procedure can cause extensive radiation exposure to cardiologists, possibly leading to cataract, alongside other longer term health risks.

The IAEA is helping the medical community address this problem through a major international initiative aimed at training cardiologists and other medical professionals in radiation protection.

The study is being led by a team of experts, including Eliseo Vano, radiology department of the Complutense University of Madrid; Norman Kleiman, Columbia University, New York; local ophthalmologists from Bogota and Raul Ramirez of the IAEA Department of Technical Cooperation.

The initiative is part of an international action plan on the radiological protection of patients spearheaded by the IAEA.

“In the meeting of Latin American cardiologists, we will offer participants the possibility to have their eyes tested for early changes of radiation effect that may lead to cataract in future years,” said Eliseo Vano.

“This will allow us to assess retrospectively what radiation dose these cardiologists received, and then correlate the data with changes in their lens,” Vano added.

IAEA´s Madan Rehani, a radiation safety specialist, said “we started training courses for cardiologists in 2004 and so far cardiologists from more than 50 countries have been trained in radiation protection”.

This September, the IAEA is organising a study to test the eyes of interventional cardiologists participating in a regional medical conference, organised by the Latin American Society of Interventional Cardiologists (SOLACI) in Bogota, Colombia.

Scientists closer to creating blood

Saturday, August 30th, 2008

Johns Hopkins researchers say that they have identified the earliest form of human blood stem cells, and discerned how they replicate and grow.

The researchers say that these stem cells are pinpointed by a biochemical marker called angiotensin-converting enzyme (ACE), which is well known for its role in the regulation of blood pressure, blood vessel growth, and inflammation.

T/hey believe that their findings can revolutionise treatments for heart diseases, anemias, leukemia and other blood cancers, and autoimmune diseases because ACE plays a fundamental role in the very early growth and development of human blood cells.

“We figured out how to get the ”mother” of all blood stem cells with the right culture conditions,” says Dr. Elias Zambidis of the Institute of Cell Engineering at the Johns Hopkins University School of Medicine and the Division of Pediatric Oncology at the Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins.

“There is real hope that in the future we can grow billions of blood cells at will to treat blood-related disorders, and just as critically if not more so, we”ve got ACE as a ”new” old marker to guide our work,” he adds.

He has revealed that the research team discovered the role of ACE unexpectedly.

“But were very pleasantly surprised to discover it as a beacon for finding the earliest blood stem cells known, as well as new ways to find and manipulate this marker to make them grow,” he says.

Reported in the online edition of the journal Blood, the new findings explain that the earliest stem cells marked by ACE, called hemangioblasts, first arise normally in the developing human foetus, when a woman is three or four weeks pregnant.

The researchers found not only that ACE was a marker for hemangioblasts, but also that turning off the enzyme also helped guide the cells” replication and maturation into either blood or endothelial cells.

When they treated the hemangioblasts with losartan, an ACE pathway blocking agent routinely used to treat high blood pressure, the rate of blood cell production dramatically increased.

Zambidis says that the next step will be to test this research in animal models and show that “we can make lots and lots of blood cells from human stem cells for transfusions, regenerate new vascular trees for heart diseases, as well as create test tube factories for making transplantable blood cells that treat diseases.

“We are very far from treatment, but this is a big step,” he adds.

If the new technique of mass producing progenitor blood cells is eventually proven to work in humans, it would allow patients getting bone marrow transplants to have their own stem cells creating the blood they need, significantly reducing rejection risk. (ANI)

Millions of young Chinese addicted to ‘unhealthy’ Internet games: report

Saturday, August 30th, 2008

Around four million Chinese youngsters are addicted to the Internet, mainly attracted by “unhealthy” online games, state media reported Friday, citing a top legislator.

“Internet-addicted teenagers” account for around 10 percent of China’s Web users under the age of 18, the Beijing Times said, quoting Li Jianguo, a vice chairman of the standing committee of the National People’s Congress, or parliament.

The committee has called for stricter monitoring of Internet games that have illegal or inappropriate content, the report said.

It has also said games should include technology that automatically logs players off once they exceed a set number of hours of continuous play.

“Unhealthy” games by Chinese government standards could refer to those featuring violence and pornography as well as “unpatriotic games” that make Chinese soldiers or agents the enemy.

The government has tried various measures to regulate the booming online gaming market and curb teenagers’ use of Internet games.

In 2006, it ordered all Chinese Internet game manufacturers to install technology in their games that demands players reveal their real name and identification number.

Comcast Limits Homes To 250GB in New Public Policy

Saturday, August 30th, 2008

Comcast has made it official: Home Internet service customers are limited to 250GB of data per month. According to the company, the move is in response to heavy usage by some customers that can cause network congestion.

The new policy was posted on Comcast’s Web site early Friday, and the meter starts running on Oct. 1.

Charlie Douglas, director of corporate communications for online services, said, “The amount of data measured is aggregate monthly usage of uploads and downloads.”

And Comcast has added some teeth to the usage limit — the first time the limit is exceeded, the offending customer will receive a phone call from a Comcast representative. The second violation will result in a shutdown of Internet service for one year.

The amended service policy states in part: “It’s no secret we’ve been evaluating a specific monthly data usage or bandwidth threshold for our Comcast High-Speed Internet residential customers for some time.” The threshold is high for the majority of Comcast users.

Examples of what a 250GB limit equates to are cited in the amendment, such as sending 50 million e-mails, downloading 62,500 songs, 125 standard-definition movies, or uploading 25,000 high-resolution digital photos. The policy says the median monthly usage for residential Comcast customers is 2GB to 3GB per month.

Bandwidth Hogs

Some observers say Comcast has a reasonable argument. The company has expanded rapidly into business and residential phone service, meanwhile maintaining its large cable-television enterprise. There is only so much available bandwidth at any given time.

Comcast is moving data, voice and television and high-definition video over the same pipes. It only takes a few peer-to-peer file-sharing applications to cause unexpected congestion.

Making Policies Public

Comcast’s previous efforts to address the problem brought a rebuke from the Federal Communications Commission. Comcast was caught throttling down the connections of BitTorrent P2P users on its network without their knowledge.

When the matter came before a congressional subcommittee, Comcast admitted to the practice and was ordered to stop gating individual connections. The FCC and Congress felt the targeting of individual accounts without notification was the main issue.

In its new policy Comcast is not limiting bandwidth on the sly, nor is it keeping its policies private. In fact, the company is posting a banner ad on its home page and sending flyers detailing the new policy to each of its customers in September. The company has also posted suggestions for using download-metering software that will track usage, much like the minute counters on cell phones.

Douglas emphasized, “This does not affect our commercial customers.” Comcast has been aggressively moving into unified data services for commercial accounts, and some, especially those involved in backup and disaster recovery, could go over the 250GB limit, but that service is separate from residential accounts, said Douglas.

“We need to remember that the amount of usage we are talking about, more than 250GB a month, does not apply to more than 99 percent of our customers. So the less than 1 percent who are notified today receive a phone call from Comcast asking them to moderate their usage, which the vast majority of them do voluntarily,” Douglas said.

Other broadband providers are also likely to publicize limits.

Gameworld: Videogaming enters the Third Dimension

Saturday, August 30th, 2008

Videogamers, your glasses to transport you into three dimensional space.

Visual computing technology company Nvidia (NVDA.O) has unveiled the first mainstream 3D gaming technology at the inaugural NVISION 08 conference in San Jose, which focused on the convergence of technology with Hollywood, games and business.

With Hollywood migrating to 3D for event movies like “Journey to the Center of the Earth” and next year’s “Avatar” from James Cameron, the electronics and gaming industries have created new technology that lets home systems and PCs also deliver true 3D.

This technology uses clear 3D glasses similar to those used at an IMAX theater.

On the show floor, games like upcoming Spore and Call of Duty: World at War and recent releases like Race Driver Grid, Devil May Cry 4, and Unreal Tournament 3 were playable on 73-inch Mitsubishi 3D Ready 1080p DLP TVs and Viewsonic 3D Ready 120Hz LCD displays.

Publishers like Ubisoft (UBIP.PA), which is developing the game based on “Avatar,” are already taking advantage of this new technology for new gameplay experiences to be released next year.

“Stereoscopic technology will have gamers going back two or three years and playing older games just to see how they look in 3D,” said Jen-Hsun Huang, CEO of Nvidia.

A packed theater of thousands of engineers, designers, developers, gamers and business professionals from around the world put on 3D glasses and watched a spectacular castle siege in Microsoft’s 2005 PC strategy game, Age of Empires III.

Huang also focused on the future of massively multiplayer online (MMO) games. There are currently over 100 million active global gamers playing MMO games like World of Warcraft, EverQuest II and Pirates of the Caribbean Online.

“We believe the notion of an MMO and a social network will converge and create a new type of virtual world where people can meet and hang out and just chat with their friends,” said Huang.

Korean developer Nurien showed off its Nurien Social Network, a hybrid game world that allows players to create and dress their avatar and then design their home.

This home serves as a 3D homepage for web browsing, watching videos and playing games like a dancing competition.

Tricia Helfer, who starred virtually last year as General Kilian Qatar in Electronic ArtsCommand & Conquer 3: Tiberium Wars game, showed how 3D technology is influencing Hollywood and her Sci-Fi Channel show, “Battlestar Galactica.”

“What they’re doing with visual computing is transforming a lot of industries,” said Helfer. “I see on the set in Hollywood every day what computer technology is doing for entertainment.”

Acclaimed game creator Lorne Lanning told the conference how game technology is opening up new opportunities for filmmakers.

“Videogame engines provide an entirely different logic to how we’re thinking about making films,” said Lanning.

“The game design industry grasps this easily. The filmmakers are taking some time to figure this out, but eventually they’re going to get it. Hollywood loves it because using a game engine brings the budget down.”

Comcast to make monthly Internet use cap official

Friday, August 29th, 2008

Comcast Corp., the nation’s second-largest Internet service provider, Thursday said it would set an official limit on the amount of data subscribers can download and upload each month.

On Oct. 1, the cable company will update its user agreement to say that users will be allowed 250 gigabytes of traffic per month, the company announced on its Web site.

Comcast has already reserved the right to cut off subscribers who use too much bandwidth each month, without specifying exactly what constitutes excessive use.

“We’ve listened to feedback from our customers who asked that we provide a specific threshold for data usage and this would help them understand the amount of usage that would qualify as excessive,” the company said in a statement on its Web site.

Customers who go over the limit are contacted by the company and asked to curb their usage.

“We know from experience the vast majority of customers we ask to curb usage do so voluntarily,” the company said.

Comcast floated the idea of a 250 gigabyte cap in May and mentioned then that it might charge users $15 for every 10 gigabytes they go over, but the overage fee was missing in Thursday’s announcement.

Curbing the top users is necessary to keep the network fast and responsive for other users, Comcast has said.

Comcast stressed that the bandwidth cap is far above the median monthly usage of its customers, which 2 to 3 gigabytes.

Very few subscribers use more than 250 gigabytes, it said. A user could download 125 standard-definition movies, about four per day, before hitting the limit.

The cap is also above those of some other ISPs. Cox Communications‘ monthly caps vary from 5 gigabytes to 75 gigabytes depending the subscriber’s plan. Time Warner Cable Inc. is testing caps between 5 gigabytes and 40 gigabytes in one market. Frontier Communications Co., a phone company, plans to start charging extra for use of more than 5 gigabytes per month.

Economy rebounds in 2Q, mostly spurred by exports

Friday, August 29th, 2008

The economy shifted to a higher gear in the spring, growing at its fastest pace in nearly a year as foreign buyers snapped up U.S. exports and tax rebates spurred shoppers at home.

The Commerce Department reported Thursday that gross domestic product, or GDP, increased at a 3.3 percent annual rate in the April-June quarter. The revised reading was much better than the government’s initial estimate of a 1.9 percent pace and exceeded economists’ expectations for a 2.7 percent growth rate.

The rebound comes after two dismal quarters. The economy actually shrank in the final three months of 2007 and limped into the first quarter at a feeble 0.9 percent pace. The 3.3 percent growth in the spring was the best performance since the third quarter of last year, when the economy was chugging along at a brisk 4.8 percent pace.

Still, the growth pickup is not likely to be seen as a lasting sign that the fragile economy is back on solid ground.

Federal Reserve Chairman Ben Bernanke recently warned the economy will be weak through the rest of this year. A growing number of analysts fear that the country will hit another economic pothole in the fourth quarter, as the bracing impact of the tax rebates disappears. And there are concerns exports could tail off as other countries’ economies slow down.

GDP measures the value of all goods and services produced within the U.S. and is the best barometer of the country’s economic health.

The economy is the top concern for Americans. Democratic presidential contender Barack Obama favors a second government stimulus package, while Republican rival John McCain supports free trade and other business measures to energize the economy.

Housing, credit and financial troubles have pounded the economy.

In turn, employers have clamped down on hiring, driving the nation’s unemployment rate up to 5.7 percent in July, a four-year high. The Labor Department said Thursday that the number of people signing up for jobless benefits declined last week for the third straight period, but claims remained above 400,000, an indicator of a slowing economy.

Employers have cut jobs every month this year and wage growth is trailing inflation. That combination raises concerns about the future of consumer spending, one of the pillars underpinning the economy.

The biggest factor in the second-quarter’s rebound was robust sales of U.S. exports to other countries. The weaker value of the U.S. dollar has bolstered those sales. Exports grew at a 13.2 percent pace in the spring. That was much stronger than the government’s initial estimate of a 9.2 percent growth rate, and more than double the 5.1 percent growth rate logged in the first quarter.

Imports, meanwhile, fell at a 7.6 percent annualized pace in the spring, as economic troubles in the U.S. crimped demand for foreign-made goods.

The improved trade picture added 3.1 percentage points to second-quarter GDP, the most since 1980.

U.S. consumers boosted their spending at a 1.7 percent pace in the second quarter. That was slightly better than the 1.5 percent growth rate initially report and marked the best showing in nearly a year. Government stimulus checks of up to $600 a person helped energize shoppers who had hunkered down amid the economy’s problems.

One of the country’s biggest problems — the housing collapse — was evident in the GDP report.

Builders cut back at an annual rate of 15.7 percent in the second quarter_ although that was a better showing than early this year and late last year.

Businesses trimmed spending on equipment and software in the spring. And, they reduced investment in inventories, but not as much as initially estimated by the government. That was another factor contributing to the improved GDP reading.

One measure of corporate profits showed companies losing ground in the second quarter. After-tax profits fell 3.8 percent in the spring, compared with a 1.1 percent increase in the first quarter.

An inflation gauge tied to the GDP report showed all prices rising at a rate of 4.2 percent in the second quarter, the same as initially estimated.

Taking out energy and food, prices rose 2.1 percent. That also was unchanged from the government’s previous estimate but remained outside the Federal Reserve’s comfort zone.

With the economy still coping with fallout from housing and credit problems, the Fed is expected to hold interest rates steady at its next meeting on Sept. 16, and probably through the rest of this year.

Malaysia blocks anti-government news Web site

Thursday, August 28th, 2008

KUALA LUMPUR, Malaysia - Malaysia has blocked access to a popular news Web site that often runs afoul of authorities for its sensational political reporting, sparking complaints Thursday that the government has reneged on its pledge to keep cyberspace uncensored.

The Malaysian Communications and Multimedia Commission, the government’s industry regulator, ordered local Internet service providers on Wednesday to cut off access to the Malaysia Today site, said a commission official who requested anonymity because of the sensitivity of the issue.

The site was deemed to have broken the law, the official said, adding that the commission would issue a formal statement with details later.

The site — which remains accessible through an alternative link — is run by one of Malaysia’s feistiest online commentators, Raja Petra Raja Kamarudin, who has published numerous claims about alleged wrongdoing by government leaders.

Raja Petra was charged with sedition in May for allegedly implying the deputy prime minister was involved in the killing of a young Mongolian woman, and his trial begins in October. Government officials have repeatedly accused him of spreading malicious falsehoods.

“Blocking my site is a move by a desperate government that is trying to silence me, but it’s not going to stop me,” Raja Petra told The Associated Press. “It only reveals that the government does not know how to handle the Internet.”

Home Minister Syed Hamid Albar defended the move, saying, “Everyone is subject to the law, even Web sites and blogs.”

But the crackdown on Malaysia Today drew criticism from bloggers and journalists who accused authorities of seeking to deter dissent.

Wong Chun Wai, group chief editor of The Star, Malaysia’s leading English daily, said the order to block Raja Petra’s site was “myopic and ridiculous” and clashed with the government’s promise not to censor the Internet.

“If it can happen to (Raja Petra), it can also happen to other bloggers,” Wong wrote on his blog. “In a democracy, we don’t have to agree with each other but we must defend the right of everyone to speak up — including (Raja Petra) and other voices of dissent.”

Some of Malaysia’s most popular Web sites and blogs offer fiercely anti-government commentaries, presenting themselves as an alternative to mainstream media, which are controlled by ruling political parties or closely linked to them.

Syed Hamid said the government does not “intend to curtail people’s freedom or right to express themselves.”

“But when they publish things that are libelous, slanderous or defamatory, it is natural for (authorities) to act,” he was quoted as saying by The Star newspaper on its Web site.

Man arrested for posting Guns N’ Roses songs on Web

Thursday, August 28th, 2008

Federal officials on Wednesday arrested a man on suspicion of violating copyright laws for placing songs on the Internet from an unreleased album by rock band Guns N’ Roses.

Kevin Cogill, 27, who has no known direct affiliation with Guns N’ Roses, posted nine tracks from the band’s upcoming album “Chinese Democracy” on his Web site, said Laura Eimiller, a spokeswoman for the Federal Bureau of Investigation.

The long-awaited upcoming album from Guns N’ Roses, a hard-rocking group that came to fame in 1987 with the album “Appetite for Destruction,” is the band’s first since its 1993 release “The Spaghetti Incident?”

An FBI agent said in an affidavit that Cogill admitted to posting the tracks on the Internet at www.antiquiet.com.

Cogill removed the tracks from the Web site, but by then the songs had circulated widely, Eimiller said.

Cogill, who appeared in court on Wednesday on a charge of unlawfully leaking the songs, faces a maximum of three years in prison if convicted, and five years if it’s found that he did it for commercial gain. He was released on bail.

Fans atwitter over shutdown of “Mad Men” feed

Wednesday, August 27th, 2008

Cable network AMC has angered online fans of its critically acclaimed drama “Mad Men” by asking social networking site Twitter to shut down feeds inspired by the show.

The fan-penned feeds consist of brief text-message-length posts in the voices of “Mad Men” characters. Users can subscribe to the daily musings of virtual Don Draper, Peggy Olson and other employees of fictional advertising agency Sterling Cooper.

Twitter’s presentation doesn’t make clear whether the feeds are endorsed by the network, and AMC didn’t appreciate that some of the characters promoted products other than the show (including Twitter itself). The network complained, and Twitter yanked some of the feeds, causing the surviving “characters” to start frantically Twittering about getting “fired.”

“It seems very quiet in the office today,” noted boss Bertram Cooper.

“I worked hard. I did my job. But the boys at Twitter are just as churlish as the boys at Sterling Cooper. Such a pity they’re so petty,” Olson wrote on a newly registered account after her first feed was suspended.

The shutdown resulted in bloggers and Twitter fans criticizing AMC: “Its legal maneuvering may go down as the single worst use (misuse?) of social media,” Adrants.com wrote.

Many Twitter accounts are fans pretending to be fictional characters, so the “Mad Men” flap could set a precedent for Twitter users. Although anybody can legally pretend to be any made-up character, Twitter could be in violation of AMC’s trademark if its presentation successfully confuses readers as to whether the feeds are endorsed by the network.

Still, sources said that AMC still is looking into the matter and noted that some executives at the network recognize the value of the feeds. The show has dropped sharply in the ratings since its second-season premiere. And Don Draper certainly would approve of his product getting free advertising.