Thursday, May 16, 2013

Live from Google I/O's 2013 opening keynote!

The time is nearly here and we are ready to liveblog. Will Google unveil the long-rumored Nexus 7 successor? Will there be new phones to consider? What does the future hold for Google Glass? Over the course of the next three hours (!) we're eager to find out. Join us at 9:00 AM PT for all the excitement.

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Source: http://feeds.engadget.com/~r/weblogsinc/engadget/~3/BOebFOCqWMA/

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Sugar-sweetened beverages associated with increased kidney stone risk

May 15, 2013 ? Twenty percent of American males and 10 percent of American females will experience a kidney stone at some point in their lifetime. Often, these patients will be advised to drink more fluids as a way to prevent future stone formation. Now, new research from Brigham and Women's Hospital finds that some beverages may be more helpful than others when it comes to preventing recurrent kidney stones.

In a study published online May 15, 2013 in the Clinical Journal of the American Society of Nephrology (CJASN), researchers report that the consumption of sugar sweetened soda and punch is associated with a higher risk of stone formation.

"Our study found that the relation between fluid intake and kidney stones may be dependent on the type of beverage consumed," explained Gary Curhan, MD, ScD, a physician in the Channing Division of Network Medicine at BWH and senior author of this study. "We found that higher consumption of sugar-sweetened drinks was associated with a higher incidence of kidney stones."

The researchers analyzed data from three ongoing cohorts, the Health Professionals Follow-Up Study (HPFS), and both the Nurses' Health Study I (NHS I) and II (NHS II). The total analysis involved 194,095 participants over a median follow-up of more than 8 years. Participants in all the three cohorts had been asked to complete biennial questionnaires with information on medical history, lifestyle, and medication. Questions on diet were updated every four years. They found that participants who consumed one or more sugar-sweetened cola servings per day had a 23 percent higher risk of developing kidney stones compared with those participants consuming less than one serving per week. This was true for consuming sugar-sweetened non cola as well, such as punch. They also found that some beverages, such as coffee, tea and orange juice, were associated with a lower risk of stone formation.

"Our prospective study confirms that some beverages are associated with a lower risk of kidney stone formation, whereas others are associated with a higher risk," explained Pietro Manuel Ferraro, MD, a physician at the Catholic University of the Sacred Heart of Rome and corresponding author of this study. "Although higher total fluid intake reduces the risk of stone formation, this information about individual beverages may be useful for general practitioners seeking to implement strategies to reduce stone formation in their patients."

Source: http://feeds.sciencedaily.com/~r/sciencedaily/top_news/top_health/~3/0F5VR_EG77w/130515174407.htm

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Wednesday, May 8, 2013

The truth about 3-D printed guns

I spent the day yesterday desperately trying to get my hands on a gun. Specifically, the "Liberator," the 3D-printable firearm offered by Defense Distributed. I was unsuccessful, which vis probably for the best.

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The idea of download-and-print firearm plays an out-sized role in the current debate over guns ??something?to which I have contributed. Defense Distributed is explicit about its political aims, which tech site The Verge described as "crypto-anarchy." Two members of Congress, Rep. Steve Israel and Sen. Chuck Schumer have called for restrictions on the ability to print 3D weapons. With news that the plans for the weapon were downloaded 50,000 times yesterday, New York City police commissioner Ray Kelly indicated that it "obviously is a concern." So, as a resident of that city, it seemed like a natural experiment: How long would it take me from downloading a set of files to having a weapon in-hand?

RELATED: Have Powdered Plastic and a Nail? You're a Download Away from a Gun

It's been about 24 hours since Defense Distributed's long-standing goal of offering a firearm design that anyone could 3D print became a reality when it posted plans for the Liberator on its website. To celebrate the occasion, it also released this video, which you've likely already seen and don't need to watch after the first ten seconds.

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I wanted to replicate this scene. So, at about 11 in the morning on Monday, I set out on a process I expected to follow:

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  1. 1. Download the files
  2. 2. Print the files
  3. 3. Test the weapon

And here's the process I actually followed.

1. Downloading the files

By far the easiest part of the process was accessing the files themselves. Click a link, head over (somewhat amusingly) to Mega, the new sharing site created by the once-disgraced Kim Dotcom, and click "download." In short order, you have a compressed file that has potential to become lethal force. The file contains the following:

  • The license for the designs
  • A folder containing 16 "STL" files. STL is an abbreviation for the stereolithography format, a type of computer-aided design (CAD) file
  • Instructions on printing and assembling the firearm in English
  • The same, apparently, but in Chinese
  • An image of a traditional handgun with Chinese-language labels

2. Getting them printed

I do not own a 3D-printer. Late last week, the devices took a big leap forward in accessibility when Staples announced that it would carry them ??for $1,300, which was not in the budget my editor game me for this article. Last year, the office supply company announced plans to introduce 3D printing service in its stores, but that's still a ways away. So I needed to find another proto-Kinkos of the 3D-printing age.

Given the buzz, the forward-thinking nature, and the anything-anytime spirit of Manhattan, I thought finding someone who could help me print the files would be a breeze. Seeking someone to hold my hand, I reached to a colleague that I knew was familiar with the intricacies of 3D printing. He couldn't help, he told me, but offered some folks who might.

Oh, and, he had a question for me: You know you are taking a legal risk, right?

2a. The legal issue

I did, but clearly not its full extent.

There are really three issues at play. The first question is whether or not the firearm is a legal weapon. The second is whether or not I could legally own it. The third is whether or not someone could make the parts for me.

Defense Distributed is very clear about the Liberator's legal status. It is a legal firearm provided you include a key component ??a heavy slug of steel. The first part of the instructions DD provides addresses that slug:

Print (ONLY) the frame sideways (the shortest dimension is the Z axis). ?

Once the frame is finished, epoxy a 1.19x1.19x0.99" block of steel in the 1.2x1.2x1.0" hole in front of the trigger guard. ...

Once the epoxy has tried, the steel is no longer removable, and is an integral part of the frame. Now your gun has ~6 ounces of steel and is thus considered a 'detectable' firearm. So now you can print all the other parts.

The logic goes like this. The Undetectable Firearms Act of 1998 insists that a weapon be able to be traced in a metal detector. Without that slug, the Liberator isn't, since it's made entirely of plastic.

The technicalities presented go a little further. Because the frame isn't considered a component of the weapon by itself, DD insists that you build the frame and insert the steel before printing anything else, as indicated above. That way, it's impossible for you to build an illegal weapon.

Building a gun is something of a philosophical exercise. At some point, like the Ship of Theseus, you have a collection of parts; at some point you have a firearm. Legally, it's generally more specific ??and since most philosophical questions don't carry the risk of jail time if you answer wrong, nearly everyone I spoke with erred on the side of interpreting the law conservatively. Since the Liberator uses custom parts, it's primarily the detectability issue that DD is concerned about. Follow its instructions, and in DD's estimation the weapon is itself legal.

The next question was whether or not it was legal for me to have it in my possession. David Kennedy, the director of the Center for Crime Prevention and Control at New York's John Jay College, was pretty clear that it wasn't.

New York City has a variety of permits that might apply in this case. The first that Kennedy cited was the "premises permit." With such a permit, I would be allowed to have a handgun in my home, transport it to a firing range while secured and unloaded, and use it at the firing range. When I was done, same process in reverse.

I was very much not allowed to carry it in public. For that, I would need a carry permit. For that, I'd need to demonstrate "specific need" ??like being a security guard. Those, he said, were rarely granted. And "without the possession of one of those two permits," Kennedy told me, "you are not permitted to carry a handgun in New York City." I indeed had neither.

The third question ended up being the biggest one. Could a business or other third party legally print the pieces for me?

Setting aside the issue of the steel slug, no expert I spoke with felt that the printing establishments bore much risk. I spoke with James Jacobs, professor of Constitutional Law and the Courts at New York University. "If the law says it is unlawful to make the gun or part of the gun without a license," he said, you can't do it. Otherwise, "you can do what is not proscribed."

The Bureau of Alcohol, Tobacco, Firearms and Explosives has a FAQ on gun manufacture. Barring machine guns and some shotguns:

Firearms may be lawfully made by persons who do not hold a manufacturer?s license under the GCA provided they are not for sale or distribution and the maker is not prohibited from receiving or possessing firearms.

Sounds good. But there's a bit of philosophy tucked in there. What is "for sale" in this case? Does hiring someone to print a piece of a gun count as selling a gun part? The printers I spoke with weren't generally interested in testing that line. That is, once I found some printers.

2b. Finding a printer

Searches for "3D printing" are not terribly fruitful, despite this being the future and all. A look on Google did indicate that Makerbot, a well-known manufacturer of 3D printers, had a small shop in lower Manhattan. I went there, introduced myself and asked if they printed objects on demand. They don't. It was shortly after I explained what I wanted to print that someone came from behind the counter and recommended I contact Makerbot's PR person.

Shapeways, a company that allows you to upload design files that others can buy and have shipped, has printing facilities in Long Island City, across the East River from Manhattan. When I explained what I wanted to print, the response was unequivocal. The site doesn't allow weaponry "of any kind" to be posted.

Additionally, we have certain checks in place throughout the entire printing process to ensure that these items don't get printed. To host any weaponry on our site, Shapeways would legally need a firearms license, which we do not possess, nor intend to.

This is called erring on the side of caution.

I ended up finding two different firms that were willing to explore the idea of helping me print the components. With various caveats.

Image from Defense Distributed.

2c. Printing it

My goal, as I indicated at the outset, was to see how easily and quickly I could get my hands on a working firearm. I wanted to walk into some Brooklyn storefront, lay out a hundred bucks or so, hang around for half an hour, and walk out with my DIY gun kit.

The Brooklyn part was right. But 3D printing, still being a young technology, is slow. The two firms I spoke with each suggested that printing the various small parts would take hours ??eight hours in one's estimation.

Nor would it necessarily be cheap. The firm that ultimately offered to do the printing suggested that, given the number of objects and the fact that it was important to ensure that they were well-milled and that I wanted it quickly, the final price would be a bit above my budget: $1,500. My editor respectfully declined to authorize a cost that was higher than either a 3D printer itself or a?brand new AR-15 assault rifle.

It wasn't only the short timeframe and the scale of the thing that raised the price. Both firms were nervous about the prospect of doing the printing. One noted that we lived in "Bloomberg's New York," which residents of Bloomberg's New York will understand. It's an interesting experiment, but it's also a novel exploration of the legal issues surrounding the manufacture of guns. That can be off-putting. The tempered assurances of a writer on a deadline were not enough to assuage any concerns.

The $1,500 was an offer in hand. The other firm I spoke with had a significantly lower price, but similar concerns. It offered that it would normally charge $80 for similar printing ??$10 an hour ??but it quickly became clear that it wasn't terribly interested in doing the job. It suggested reaching out to maker spaces ??communal hubs offering the tools do-it-yourselfers would need to complete a project. I called a few, but ??given the limited resources and learning curve required ??quickly gave up. This step was functionally equivalent to buying a 3D printer and doing it myself, which was not the route I wanted to take.

John Jay's David Kennedy put it best.

The panic that this is causing is completely unfounded. It's not that hard to build a crude, working firearm, call it a zip gun, call it whatever you want. It is a lot easier and would be a lot easier to fabricate something with existing materials than it would be to set up a printer and build one of these things. Home manufactured firearms are a next-to-non-existent problem anywhere. I don't think this changes anything very much.

Zip guns ??firearms manufactured from materials like rubber bands and pipe and wood ??have been around for decades. They are probably less tedious to assemble, being composed, as they are, of things you can get at a hardware store. They're less ambiguously illegal, of course, but they have another distinct advantage: They may be safer.

2d. Surviving

When I first reached out to my colleague who does 3D printing, he noted that I would probably want to do a denser print. Normally, the slicing done by the computer that operates the computer results in about 20 percent density. In order for the firearm to be more durable ? which, he wrote, "I'd assume you'd want this to be" ? you'd print at a higher density, which is also slower.

He's right. I would want it to be dense. Shooting a gun is, at its most basic level, the creation of a small explosion that propels a piece of metal in the right direction. Last month, a squirrel hunter tried to create an ad hoc weapon by taping a bullet to the end of a BB gun. The explosion was not controlled, and pieces of metal propelled into his legs and arms.

When Defense Distributed tried to test the Liberator for that video above, they first tried to trigger it with a lengthy piece of string, Mythbusters-style.

Once that worked, they tested it by hand. Since the lifespan of the roughly-finished weapon is described in the instructions as "1 round" ? primarily because of internal damage to smaller parts ? it seemed like a good thing to test first.

We are still early, very early, in the lifespan of 3D printing. The Defense Distributed announcement may indeed be symbolic of some near future when 3D printers become more commonplace, designs for printable weapons become more refined, and the legal boundaries become more obvious and well-know. But as of right now, printing your own gun is not a feasible enterprise. At least not for your average guy who writes for websites. When I told my wife that I might be home late because I could be headed to Brooklyn to make a gun, she responded by text. "Um that sounds scary and dangerous," she said. "Can you not get arrested or shot?"

If you insist.

Photo (top): Still from a Defense Distributed YouTube video.

Source: http://news.yahoo.com/not-easy-3-d-print-gun-135843235.html

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Biologist discovers new dinosaur in China

Monday, May 6, 2013

Fossil remains found by a George Washington University biologist in northwestern China have been identified as a new species of small theropod, or meat-eating, dinosaur.

The discovery was made by James Clark, the Ronald B. Weintraub Professor of Biology, in the Department of Biological Sciences of GW's Columbian College of Arts and Sciences. Dr. Clark, along with his then doctoral student Jonah Choiniere and a team of international researchers, found the dinosaur specimen in a remote region of Xinjiang in China in 2006.

In a research paper published in the Journal of Systematic Palaeontology, Drs. Clark and Choiniere explain recovering the skull, mandible and partial skeleton of the dinosaur. The new theropod was an estimated 1 meter or just over 3 feet long and probably weighed about 3 pounds.

"All that was exposed on the surface was a bit of the leg," said Dr. Clark. "We were pleasantly surprised to find a skull buried in the rock too."

The dinosaur is named Aorun zhaoi, after the Dragon King in the Chinese epic tale Journey to the West. It wasn't necessarily a small dinosaur species, though, because Aorun was still a youngster when it became a fossil.

"We were able to look at microscopic details of Aorun's bones and they showed that the animal was less than a year old when it died on the banks of a stream," said Dr. Choiniere.

Dr. Choiniere, now a senior researcher at the Evolutionary Studies Institute at the University of the Witwatersrand in Johannesburg, South Africa, was a doctoral student in Biological Studies at GW when the discovery was made. He was also a Kalbfleisch Fellow and Gerstner Scholar at the American Museum of Natural History.

Aorun lived more than 161 million years ago, in the earliest part of the Late Jurassic Period. Its small, numerous teeth suggest that it would have eaten prey like lizards and small relatives of today's mammals and crocodilians.

This is the fifth new theropod discovered at the Wucaiwan locality by the team, co-led by Dr. Clark and Dr. Xu Xing of the Chinese Academy of Sciences.

###

George Washington University: http://www.gwu.edu

Thanks to George Washington 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 63 time(s).

Source: http://www.labspaces.net/128133/Biologist_discovers_new_dinosaur_in_China

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Tuesday, May 7, 2013

How To Find Low Cost Auto Insurance ? Hot Article Depot


Everyone tries to make ends meet nowadays. There are a lot of expenses in the household and most commodities are now becoming more expensive. Many now focus their efforts on cutting down costs.

Among those that could really steal the bulk of the pie is car insurance. You have to pay sky-rocketing premiums so it would seem impossible to save money on car insurance.

But this is not a far away dream. You can actually save a lot if you only know how to choose the right car insurance. There are actually a lot of methods that you can use. Here are some of the things that can help you find cheap car insurance or lower its cost:

1. Search for an insurance that?s based on your needs. There will surely be a huge amount spent on insurance and it will be wasted if your coverage will not meet your needs. Paying for insurance premiums is no joke so you really have to make sure you get your money?s worth.

2. Choose the right company. If you don?t watch out for the car insurance company you?ll sign up with, then it will be impossible for you to save on auto insurance. Beware of scams and other substandard insurance companies. Before signing up, be sure to double check the records and feedback of the company.

3. Drive safe.A clean driving record can earn you some discounts from car insurance providers. This usually spells lower insurance payments. In addition, you can put in some added safety features to your car. This would also reduce the risk and proportionately lower insurance caused too.

4. Don?t be too hasty. Don?t make a choice too soon when you are still in search of a car insurance company. Be sure to consider advantages and disadvantages and take into account quality over price. Some plans may be cheap but they might not be able to give you the right benefits when you need it.

5. Grab discounts.There are certain companies that offer various discounted rates. One way to save money on auto insurance is to check out your provider of other insurances like home insurance. If your house is insured try to ask the company if they also offer car insurance because they tend to give discounts to multiple policy holders.

There are many other ways to slash your car insurance expenses. You need not worry too much. You just have to put a little effort and use your head in selecting the right car insurance provider for you.

This article provides tips on how to cut car insurance costs. For more information about car insurance and how to save money on car insurance, follow the link.

Source: http://hotarticledepot.com/how-to-find-low-cost-auto-insurance/

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Clearwire says Sprint offer best option for minority stockholders

By Alasdair Fotheringham ISCHIA, Italy, May 5 (Reuters) - Team Sky took a morale-boosting victory in the Giro d'Italia team time trial as overall contender Bradley Wiggins moved up to second overall and gained time on his rivals on Sunday. Second in the short, hilly and very technical second stage were Spanish squad Movistar, nine seconds back, with Astana, led by Wiggins's key rival Vincenzo Nibali, third at 14 seconds. The first Team Sky rider to cross the line in Saturday's first stage, Italian Salvatore Puccio, took the overall leader's pink jersey. ...

Source: http://news.yahoo.com/clearwire-says-sprint-offer-best-option-minority-stockholders-131246924.html

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Arctic Ocean 'acidifying rapidly'

The Arctic seas are being made rapidly more acidic by carbon-dioxide emissions, according to a new report.

Scientists from the Arctic Monitoring and Assessment Programme (AMAP) monitored widespread changes in ocean chemistry in the region.

They say even if CO2 emissions stopped now, it would take tens of thousands of years for Arctic Ocean chemistry to revert to pre-industrial levels.

Many creatures, including commercially valuable fish, could be affected.

They forecast major changes in the marine ecosystem, but say there is huge uncertainty over what those changes will be.

It is well known that CO2 warms the planet, but less well-known that it also makes the alkaline seas more acidic when it is absorbed from the air.

Continue reading the main story

The Arctic

  • The Arctic region contains a vast ice-covered ocean roughly centred on the Earth's geographic North Pole
  • The Sun doesn't rise at all on the shortest day of the year within the Arctic Circle
  • Humans have inhabited the Arctic region for thousands of years, and the current population is four million
  • Geologists estimate the Arctic may hold up to 25% of the world's remaining oil and natural gas

Absorption is particularly fast in cold water so the Arctic is especially susceptible, and the recent decreases in summer sea ice have exposed more sea surface to atmospheric CO2.

The Arctic's vulnerability is exacerbated by increasing flows of freshwater from rivers and melting land ice, as freshwater is less effective at chemically neutralising the acidifying effects of CO2.

The researchers say the Nordic Seas are acidifying over a wide range of depths - most quickly in surface waters and more slowly in deep waters.

The report?s chairman, Richard Bellerby from the Norwegian Institute for Water Research, told BBC News that they had mapped a mosaic of different levels of pH across the region, with the scale of change largely determined by the local intake of freshwater.

?Large rivers flow into the Arctic, which has an enormous catchment for its size,? he said.

?There?s slow mixing so in effect we get a sort of freshwater lens on the top of the sea in some places, and freshwater lowers the concentration of ions that buffers pH change. The sea ice has been a lid on the Arctic, so the loss of ice is allowing fast uptake of CO2.?

This is being made worse, he said, by organic carbon running off the land ? a secondary effect of regional warming.

?Continued rapid change is a certainty,? he said.

?We have already passed critical thresholds. Even if we stop emissions now, acidification will last tens of thousands of years. It is a very big experiment.?

The research team monitored decreases in seawater pH of about 0.02 per decade since the late 1960s in the Iceland and Barents seas.

Chemical effects related to acidification have also been encountered in surface waters of the Bering Strait and the Canada Basin of the central Arctic Ocean.

Scientists estimate that the average acidity of surface ocean waters worldwide is now about 30% higher than before the Industrial Revolution.

The researchers say there is likely to be major change to the Arctic marine ecosystem as a result. Some key prey species like sea butterflies may be harmed. Other species may thrive. Adult fish look likely to be fairly resilient but the development of fish eggs might be harmed. It is too soon to tell.

Follow Roger on Twitter @rharrabin

Source: http://www.bbc.co.uk/news/science-environment-22408341#sa-ns_mchannel=rss&ns_source=PublicRSS20-sa

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