Wednesday, July 10, 2013

What is Facebook Graph Search, and will it help stalkers find me?

The highly anticipated and extremely confusing Facebook Graph Search feature is now in effect for U.S. Facebook users who post in English. If you don't have the Graph Search feature on your Facebook page, you will within the next three weeks. You've heard about Graph Search for months, but it's kind of a difficult concept to explain, and you didn't have it anyway so who cares. Now you do have Facebook Graph Search -- and it has you, to submit you as a search result to people you do not know.

If you're among the thousands who got Facebook Graph Search capabilities yesterday, go ahead and fool around with it to see how it works. More importantly, fool around with your privacy settings so the damned thing doesn't get creepier than OKCupid the day before Valentine's Day.

Let's take a look at what Facebook Graph Search does, and what you can do to minimize unwanted romantic solicitations or lingerie picture embarrassment.

Facebook is launching Facebook Graph Search to all English-speaking U.S. users, beginning this week. It's a little different from the standard Facebook text search you're used to. The search bar even looks different -- it's now white with a blue background, instead of grey on blue.

Graph Search doesn't just search for text words. It combines numerous text searches for you into a single broad thematic search, and gives you more search results than you could ever have had displayed before. Graph Search will show you results for your friends, friends of friends, or anything marked "Public".

So if you showed people your boobs at Burning Man that one time, you'll want to take that picture down or else mark it as "Private".

Just for kicks, I tried a Graph Search on "Single Christians who like Neil Diamond". I got dozens of results -- not one of whom was a friend of mine, nor a friend of a friend. So your privacy settings on Facebook matter more than ever, because stalkers can now find you based on interests instead of just your name or location.

How to change these privacy settings? If you've always ignored your Facebook privacy settings, no may be the time to pay attention to them.

On your Facebook profile page, click on Activity Log. This will display everything you've done on Facebook, and it scrolls down far enough that it does show literally everything. If there's anything you don't want to be public, click the little icons to the right of that statement, comment or picture to make it private.

You'll want to go through your photos as well, and mark anything you're not comfortable with as "Private". If you want to know what I mean, try performing a Graph Search on "Pictures of Single Women". Consider the results you see. And then consider that ten thousand creepers are currently performing the exact same search, and getting very similar results.

Facebook Graph Search does not intend to violate your privacy -- it intends to simply sell more advertising on Facebook. Just be careful with your settings, because Facebook will always remember that time you showed people your boobs at Burning Man.

Source: http://www.allvoices.com/contributed-news/14956569-what-is-facebook-graph-search-and-will-it-help-stalkers-find-me

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Choral Singers Sync Heartbeats

60-Second Science

Because phrasing requires synchronous respiration, choral singers also sync up their heartbeats, which may add to the group feeling of unison. Sophie Bushwick reports.

More 60-Second Science

Music. It can tug at our hearts. Perhaps even literally. Because when people sing together, their hearts begin to beat in sync with each other. [Bj?rn Vickhoff et al, Music structure determines heart rate variability of singers]

Researchers monitored the heart rates of 15 teenagers as they produced sounds solo. The participants either hummed one note or sang a hymn while breathing whenever they wanted. They also performed a mantra that required them to breath only at the end of each phrase. Then the exercises were repeated by groups of five subjects all singing at once. And when the subjects performed regular song structures in unison, their heart rates slowed down and sped up at the same time.

Vocal performances impose set breathing patterns, which regulate and synchronize heartbeats. According to the researchers, choral participation can thus improve well-being. It not only tones the cardiovascular system, but also produces the same relaxing effect as breathing exercises practiced in yoga. So music truly soothes the savage breast?or at least, the heart beating inside it.

?Sophie Bushwick

[The above text is a transcript of this podcast]?


Source: http://rss.sciam.com/~r/sciam/basic-science/~3/LALs9nhSNKQ/episode.cfm

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House GOP plan would slash IRS budget by 24 percent

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Source: www.washingtonpost.com --- Wednesday, July 10, 2013
House Republicans have put forward a bill that would cut the Internal Revenue Service's budget by nearly one-quarter for fiscal 2014. The measure would give the IRS $9 billion for fiscal 2014, representing a 24-percent reduction compared to the previous budget cycle and the lowest amount of funding for the agency since 2001. Read full article >> ? ? ? ? ...

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Tuesday, July 9, 2013

Raw: Washington Monument Lit Up During Repairs

Raw: Washington Monument Lit Up During Repairs | www.foxreno.com

Starting Monday, the National Park Service will light up the Washington Monument during a major repair project that has left it closed since an earthquake. (July 8)

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Source: http://www.foxreno.com/videos/ap/travel/raw-washington-monument-lit-up-during-repairs/v57jx/

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13.07.08 11:00 Big Brothers Big Sisters of the Greater Chesapeake's Eastern Shore Golf Classic - Monday July 8, 2013 starting at 11:00 am @ River Marsh Golf Club

[unable to retrieve full-text content]

Source: www.calendarwiz.com --- Monday, July 08, 2013
Big Brothers Big Sisters of the Greater Chesapeake's Eastern Shore Golf Classic will be held on Monday, July 8th at River Marsh Golf Club at the Chesapeake Bay Hyatt Regency in Cambridge, Maryland. Re... ...

Source: http://www.calendarwiz.com/calendars/popup.php?op=view&id=64590025&crd=wmdt

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jQuery Google Search Videobar 1.1.0

It displays a set of video links based on provided search terms. The default search term is 'jquery'.

Hovering the mouse over a video thumbnail will display the name and duration of the movie.

Google places some restrictions on your use of this service, including obtaining a key specific to a target URL providing the service, making the Web site freely accessible, and showing included Google branding.

Here are some key features of "jQuery Google Search Videobar":

? Customize the search terms, including on the fly.
? Special YouTube searches.
? Horizontal or vertical presentation.
? Automatic cycling of search results.
? Popup or inline player.

Requirements:

? JavaScript enabled on client side
? jQuery 1.2 or higher

What's New in This Release: [ read full changelog ]

? Updated for jQuery 1.6.

Source: http://webscripts.softpedia.com/script/Multimedia/Video/jQuery-Google-Search-Videobar-59342.html

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Support Coming for Chinese Plane Crash Survivors

The Chinese students involved in Saturday?s harrowing crash landing in San Francisco will soon get some additional support.

A group of 17 family members, school administrators and local government officials from their area left on Monday morning with plans to fly to San Francisco later in the day, according to officials at the school the students attended. The group includes family members of the two dead girls and those of two badly injured ones.

South Korea?s Asiana Airlines has identified the dead girls as Wang Linjia and Ye Mengyuan, both 16 years old.

The family and officials were leaving from Jiangshan, the county in China?s eastern Zhejiang province where the school is based. Once in the U.S., the administrators plan to assess the next step for the students, many of whom lost luggage and personal effects like glasses and mobile phones.

Nicknamed Jiangzhong, the school is a multi-building complex of gray brick with a sports track in the center. The well-regarded school is relatively large with enrollment of up to 800 students each year, but on Monday was quiet for the summer holidays. Aside from a contingent of reporters, there was little sign on campus of the tragedy that involved its students.

?James T. Areddy and Fanfan Wang. Follow James on Twitter @jamestareddy

Like China Real Time on Facebook and follow us Twitter for the latest updates.

Source: http://blogs.wsj.com/chinarealtime/2013/07/08/support-coming-for-chinese-plane-crash-survivors/?mod=WSJBlog

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Friday, July 5, 2013

Deadspin 36 Cheap American Beers, Ranked | Gawker Two Men Caught on Video Assaulting LGBT Youth Grou

Deadspin 36 Cheap American Beers, Ranked | Gawker Two Men Caught on Video Assaulting LGBT Youth Group After Pride Parade | Lifehacker The Science of Breaking Out of Your Comfort Zone (and Why You Should) | io9 Lone Ranger is Johnny Depp's tribute to shitty superhero origin films

Source: http://lauren.kinja.com/deadspin-36-cheap-american-beers-ranked-gawker-two-m-658731399

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Report: Lovefilm will cease UK game rentals by August 8th

Lovefilm chops game rentals for new UK customers, will cut it altogether August 8th

Lovefilm has told Eurogamer that it will no longer offer game rentals by mail in the UK after August 8th. Additionally, the Amazon division confirmed via its blog that the option is no longer available to new subscribers. In addition, existing customers will no longer be able to add the service, a fact that only came to light when someone spotted it on a company FAQ (see the More Coverage link). Lovefilm apologized profusely for the non-communication, and explained that the change was made so it could focus on streaming content instead. It promised to contact subscribers "in the very near future" to confirm the policy, and "strive to communicate directly with our customers" rather than letting them find out through the media. The firm's yet to actually confirm that the service will be cut off completely next month, however -- perhaps that would be a good place to start.

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Source: Lovefilm, Eurogamer

Source: http://feeds.engadget.com/~r/weblogsinc/engadget/~3/9lZa4Zvcotc/

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Thursday, July 4, 2013

Singapore to Indonesia: Stop sending us your smog.

Air pollution in Singapore?rose to unhealthy levels this week because of illegal forest clearing in Indonesia,?prompting?Singapore?to urge Indonesia to do something to end the haze.

By Sara Schonhardt,?Correspondent / June 20, 2013

A masked man walks as the sun sets among buildings covered with haze at the Singapore Central Business District Thursday, June 20, 2013. Singapore urged people to remain indoors amid unprecedented levels of air pollution Thursday as a smoky haze wrought by forest fires in neighboring Indonesia worsened dramatically.

Joseph Nair/AP

Enlarge

Cloudy skies in Jakarta were no match for the breathtaking haze that hit Singapore?on Thursday?as air-pollution levels rose to record highs and sparked a war of words between diplomats in both countries over who should shoulder the blame.

Skip to next paragraph Sara Schonhardt

Indonesia Correspondent

Sara Schonhardt is a Monitor contributor based in Jakarta, Indonesia, where she has been reporting since 2009.?Sara previously worked for various media in Thailand and Cambodia and received her master?s degree from the School of International and Public Affairs at Columbia University.

Recent posts

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Companies have asked employees to work from home, the military has stopped training outdoors, and pictures of Singapore's iconic Marine Bay Sands towers barely visible through the haze have been splashed across social media platforms?and newspapers.

Despite the international blame game, the immediate cause was clear enough: fires used to clear land in Sumatra for farming and palm oil plantations. A local meteorological agency reported nearly 150 hotspots alone in Riau Province, itself a hotspot for mining, logging, and palm oil production.

Environmental advocacy group Greenpeace released a statement saying that the fires illustrated how Indonesia?s government policies aimed at reducing deforestation had failed?since half of them were in areas off-limits to land clearing.

Each year slash and burn practices in Indonesia shroud neighboring Singapore and Malaysia in thick haze. As deforestation has accelerated in recent years, it has worsened.

On Thursday,?Singapore sent a delegation from its environmental agency to Jakarta to call for immediate action.?Singapore?s environment minister, Vivian Balakrishnan, issued an angry statement?on his Facebook page saying no country or corporation ?has the right to pollute the air at the expense of Singaporeans? health and well-being.??

But Indonesia shot back its own statement: Singapore should stop ?behaving like a child,? said Indonesia?s?Coordinating Minister for People's Welfare, Agung Laksono, who oversees fire response.

Mr. Balakrishnan had asked the Indonesian government to name and shame the companies involved in the illegal burning. But Indonesia?s forestry ministry launched back, saying?Singapore and Malaysia shared the responsibility for putting pressure on the resource extraction industry since many of companies were based in their countries.

Source: http://rss.csmonitor.com/~r/csmonitor/globalnews/~3/DSOCJEKKLvY/Singapore-to-Indonesia-Stop-sending-us-your-smog

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Wednesday, July 3, 2013

HTC confirms One S will no longer receive Android updates

HTC confirms One S will no longer receive Android updates

It's not a Nexus, so suspend your disbelief: HTC's One S will not be getting any further Android updates. That's right, One S owners, your device is now officially a relic. In a statement released to the press, HTC today confirmed that the mid-ranger, which bowed last year in tandem with the One X, will remain frozen on 4.1.1 Jelly Bean. That means current owners will have to look elsewhere (read: developer forums) for unofficial access to Sense 5 ROMs and the latest tweaks Google's packed into Android 4.2 updates. We can't really lament the loss of BlinkFeed, but it sure would've been nice to see HTC port Zoe over to the device. At the very least, this makes a strong case for that Google Play edition One and its promise of consistent updates.

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Source: http://www.engadget.com/2013/07/02/htc-confirms-one-s-will-no-longer-receive-android-updates/?utm_medium=feed&utm_source=Feed_Classic&utm_campaign=Engadget

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If you're a die-hard Reeder fan but are struggling now Google Reader's dead, good news: the iOS app

If you're a die-hard Reeder fan but are struggling now Google Reader's dead, good news: the iOS app now supports Feedly and Feed Wrangler. Go update.

Read more...

    


Source: http://feeds.gawker.com/~r/gizmodo/full/~3/KP-PTv1IHZg/if-youre-a-die-hard-reeder-fan-but-are-struggling-now-g-643936923

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Takes Your Breath Away (talking-points-memo)

Share With Friends: Share on FacebookTweet ThisPost to Google-BuzzSend on GmailPost to Linked-InSubscribe to This Feed | Rss To Twitter | Politics - Top Stories News, RSS and RSS Feed via Feedzilla.

Source: http://news.feedzilla.com/en_us/stories/politics/top-stories/316648492?client_source=feed&format=rss

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Demi Lovato in Cosmo: Flaunting Cleavage, Being a Badass

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Gene therapy cures a severe paediatric neurodegenerative disease in animal models

Gene therapy cures a severe paediatric neurodegenerative disease in animal models [ Back to EurekAlert! ] Public release date: 2-Jul-2013
[ | E-mail | Share Share ]

Contact: F?tima Bosch
Fatima.bosch@uab.cat
34-935-814-182
Universitat Autonoma de Barcelona

Sanfilippo Syndrome type A, or Mucopolysaccharidosis type IIIA (MPSIIIA), is a neurodegenerative disease caused by mutations in the gene that encodes the enzyme sulfamidase. Mutations in this gene lead to deficiencies in the production of the enzyme, which is essential for the breakdown of substances known as glycosaminoglicans. If these substances are not broken down, they accumulate in the cells and cause neuroinflammation and organ dysfunction, mainly in the brain, but also in other parts of the body. Children born with this mutation are diagnosed from the age of 4 or 5. They suffer neurodegeneration, causing mental retardation, aggressiveness, hyperactivity, sleep alterations, loss of speech and motor coordination, and they die in adolescence.

A team of researchers headed by the director of the UAB's Centre for Animal Biotechnology and Gene Therapy (CBATEG), Ftima Bosch, has developed a gene therapy treatment that cures this disease in animal models, with pre-clinical studies in mice and dogs. The treatment consists of a single surgical intervention in which an adenoassociated viral vector is injected into the cerebrospinal fluid, the liquid that surrounds the brain and the spinal cord. The virus, which is completely harmless, genetically modifies the cells of the brain and the spinal cord so that they produce sulfamidase, and then spreads to other parts of the body, like the liver, where it continues to induce production of the enzyme.

Once the enzyme's activity is restored, glycosaminoglican levels return to normal for life, their accumulation in cells disappears, along with the neuroinflammation and dysfunctions of the brain and other affected organs, and the animal's behaviour and its life expectancy return to normal. While mice with the disease lived only up to 14 months, those given the treatment survived as long as healthy ones.

This is a joint project between the UAB and the pharmaceutical company Esteve. The study has been published in the online edition of The Journal of Clinical Investigation.

###



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AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert! system.


Gene therapy cures a severe paediatric neurodegenerative disease in animal models [ Back to EurekAlert! ] Public release date: 2-Jul-2013
[ | E-mail | Share Share ]

Contact: F?tima Bosch
Fatima.bosch@uab.cat
34-935-814-182
Universitat Autonoma de Barcelona

Sanfilippo Syndrome type A, or Mucopolysaccharidosis type IIIA (MPSIIIA), is a neurodegenerative disease caused by mutations in the gene that encodes the enzyme sulfamidase. Mutations in this gene lead to deficiencies in the production of the enzyme, which is essential for the breakdown of substances known as glycosaminoglicans. If these substances are not broken down, they accumulate in the cells and cause neuroinflammation and organ dysfunction, mainly in the brain, but also in other parts of the body. Children born with this mutation are diagnosed from the age of 4 or 5. They suffer neurodegeneration, causing mental retardation, aggressiveness, hyperactivity, sleep alterations, loss of speech and motor coordination, and they die in adolescence.

A team of researchers headed by the director of the UAB's Centre for Animal Biotechnology and Gene Therapy (CBATEG), Ftima Bosch, has developed a gene therapy treatment that cures this disease in animal models, with pre-clinical studies in mice and dogs. The treatment consists of a single surgical intervention in which an adenoassociated viral vector is injected into the cerebrospinal fluid, the liquid that surrounds the brain and the spinal cord. The virus, which is completely harmless, genetically modifies the cells of the brain and the spinal cord so that they produce sulfamidase, and then spreads to other parts of the body, like the liver, where it continues to induce production of the enzyme.

Once the enzyme's activity is restored, glycosaminoglican levels return to normal for life, their accumulation in cells disappears, along with the neuroinflammation and dysfunctions of the brain and other affected organs, and the animal's behaviour and its life expectancy return to normal. While mice with the disease lived only up to 14 months, those given the treatment survived as long as healthy ones.

This is a joint project between the UAB and the pharmaceutical company Esteve. The study has been published in the online edition of The Journal of Clinical Investigation.

###



[ Back to EurekAlert! ] [ | E-mail | Share Share ]

?


AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert! system.


Source: http://www.eurekalert.org/pub_releases/2013-07/uadb-gtc070213.php

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Microscopic 'Tuning Forks' Could Make the Difference Between Life and Death in the Hospital

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Source: http://www.labspaces.net/128848/Microscopic__Tuning_Forks__Could_Make_the_Difference_Between_Life_and_Death_in_the_Hospital

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Tuesday, July 2, 2013

Snowden asks Russia for asylum

MOSCOW (AP) ? The Interfax news agency says a Russian consular official has confirmed that National Security Agency leaker Edward Snowden asked for political asylum in Russia.

Interfax cited Kim Shevchenko, the duty officer at the Russian Foreign Ministry's consular office in Moscow's Sheremetyevo airport, as saying that Snowden's representative, Sarah Harrison, handed over his request Sunday.

Snowden has been caught in legal limbo in the transit zone of Moscow's Sheremetyevo airport since his arrival from Hong Kong on June 23. The U.S. has annulled his passport, and Ecuador, where he has hoped to get asylum, has been coy about offering him shelter.

Russia's President Vladimir Putin says Snowden will have to stop leaking U.S. secrets if he wants to get asylum in Russia, but adds that Snowden has no plan to quit doing so.

Source: http://news.yahoo.com/report-snowden-asked-asylum-russia-165759572.html

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Saturday, May 11, 2013

Moon's water may have come from Earth-bound meteorites

Scientists investigating the source of the moon's internal water have lifted telltale fingerprints from Apollo-era lunar rocks showing that the water may have originated from meteorites bombarding Earth.

The surprisingly "wet" volcanic rock, described online Thursday in the journal Science, contradicts the theory that lunar water first came from comets. It also throws a wrench into the commonly held story about the moon's origin.

"It is as if you made the moon by just plucking a piece of the Earth and putting it in orbit," said David Stevenson, a planetary scientist at Caltech who was not involved in the new research.

Until very recently, scientists believed the moon was bone dry, said study leader Alberto Saal, a geochemist at Brown University. Established theories of how the moon came to be seemed to back it up.

Planetary scientists suspect that a Mars-sized body collided with Earth about 4.5 billion years ago, when our planet was still being formed. The collision knocked loose molten debris that coalesced to form the moon, but after any water in that debris had escaped into space, scientists thought.

And yet, a 2008 study by Saal and his colleagues found what he called "unequivocal evidence" for water in lunar magmas. In 2011, his team reported that lavas on the moon had once held essentially as much water as some lavas on Earth.

The latest study was an effort to answer two questions: From where did the water come, and when?

Recent work had suggested that the moon's water was delivered by comets. But Saal was skeptical ? he suspected that the isotopic fingerprint in those samples had been warped as the lava traveled through the moon's crust and slowly cooled on the surface, allowing most volatile molecules to escape. Millions of years of cosmic-ray bombardment would have further altered the samples, he said.

So Saal turned to rocks that were probably ejected from the moon's interior in a violent lava eruption; if so, they would have cooled so quickly afterward that water and other volatile compounds would have been trapped inside the rock, forming bits of glass.

These rocks, brought back to Earth by the Apollo 15 and 17 missions, had been deemed pristine by a barrage of chemical tests.

Saal and his colleagues studied tiny glass bubbles trapped between crystals of olivine ? drops of magma whose water hadn't been able to escape when the rock crystallized around them, sealing them in. These bits of trapped magma could have contained as much as 1,200 parts per million of water, the highest yet seen in a primitive lunar lava, Saal said.

Then they looked at the ratio of hydrogen to its heavier isotope, deuterium, in the moon rock samples. Planets, comets and asteroids all have distinct, individual isotopic fingerprints that reflect their proximity to the sun's warming rays and other environmental conditions.

It turned out that the deuterium-to-hydrogen ratios in the lunar lava did not match the comets that were the suspected source of water. Instead, the ratio synced up to primitive meteorites known as carbonaceous chondrites, which originate between the orbits of Jupiter and Mars.

What's more, the moon's isotopic fingerprint was a very close match with Earth's.

The simplest explanation, Saal said, is that meteorites brought the water to Earth while it was still forming, and that the water somehow remained even after chunks of that proto-Earth were flying into orbit.

Of course, even if the moon had its own internal source of water ? a parting gift from Earth after a violent separation ? additional water could have been brought to the lunar surface from icy comets that bombarded the moon later.

"I'm inclined to think that the measurements, and the primary interpretation, make sense," Stevenson said. But, he added, "this is a piece of the puzzle rather than a solution to the puzzle."

Saal's proposal raises as many questions as it attempts to answer. Among them: How could the debris fragments from Earth hold on to all that water before coalescing to form the moon? And shouldn't there be evidence of the third body that smashed into Earth?

"We're always counting on science to tell us where we came from," said David Paige, a UCLA planetary scientist who was not involved in the study. "But the exact set of processes that led to our origin is a tough problem to crack."

amina.khan@latimes.com

Source: http://feeds.latimes.com/~r/latimes/news/science/~3/CQn3CjeQv4g/la-sci-moon-water-20130510,0,3895364.story

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Friday, May 10, 2013

Brides turn to Internet to design budget weddings



>> the size is perfect.

>> reporter: with her wedding weeks away, floret needs a dress that won't break the bank .

>> yes. which brought her to this bridal boutique where the prices start at just $100, almost all from the diy design site etsy.

>> i think the web probably had 90% to do with me starting my business. almost every one i found online.

>> reporter: in fact, more brides these days are going digital to help match their bridal dream with their budget. 59% of brides use sites like pinterest, facebook and instagram for inspiration. 68% use technology to text or post videos during dress fittings, and 61% download wedding apps to help keep plans in place.

>> she has a great amount of platforms and places to go to find inspiration and quickly share it and organize it.

>> because we're in love and weddings are pretty.

>> reporter: ashley and noel are so budget conscious they started planning before they get engaged.

>> trying to get a head start on the plan so long we have time to pay things off and what we want. you have decoration and colors.

>> reporter: they use pinterest to gather ideas asking guests to help build playlists on spotify instead of paying for a dj, even studying an online tutorial how to make paper flowers for the wedding.

>> to make flowers you might spend $1,000 on. obviously we're going to do different things. you might lose your sanity. i'm so in love with you

>> reporter: before noel has even popped the question. what's the time line ?

>> in september i said we'll be engaged within a year. how sweet it is to be loved by you

>> reporter: leaving plenty of time to plan and save for the big day . for "today," ana navaz, nbc news, silver spring , inned md.

Source: http://feeds.nbcnews.com/c/35002/f/653377/s/2bc0736a/l/0Lvideo0Btoday0Bmsnbc0Bmsn0N0Cid0C51840A573/story01.htm

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Ouya Android-based Game Console On Track for June Delivery ...

?Although there are a lot of people saying that the Android-based Ouya gaming console will be hindered by not having cutting-edge games available for it as it launches, the console continues to generate major buzz, and developers are producing games for it. The Ouya team has also stayed on track for a June launch for its $99 consoles, focusing on a strategy of keeping the Ouya interface simple. Here are some of the most recent updates on this much awaited game console.

?

Source: https://www.linux.com/news/embedded-mobile/mobile-linux/717956-ouya-android-based-game-console-on-track-for-june-delivery

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Heady mathematics: Describing popping bubbles in a foam

May 9, 2013 ? Bubble baths and soapy dishwater, the refreshing head on a beer and the luscious froth on a cappuccino. All are foams, beautiful yet ephemeral as the bubbles pop one by one.

Two University of California, Berkeley, researchers have now described mathematically the successive stages in the complex evolution and disappearance of foamy bubbles, a feat that could help in modeling industrial processes in which liquids mix or in the formation of solid foams such as those used to cushion bicycle helmets.

Applying these equations, they created mesmerizing computer-generated movies showing the slow and sedate disappearance of wobbly foams one burst bubble at a time.

The applied mathematicians, James A. Sethian and Robert I. Saye, will report their results in the May 10 issue of Science. Sethian, a UC Berkeley professor of mathematics, leads the mathematics group at Lawrence Berkeley National Laboratory (LBNL). Saye will graduate from UC Berkeley this May with a PhD in applied mathematics.

"This work has application in the mixing of foams, in industrial processes for making metal and plastic foams, and in modeling growing cell clusters," said Sethian. "These techniques, which rely on solving a set of linked partial differential equations, can be used to track the motion of a large number of interfaces connected together, where the physics and chemistry determine the surface dynamics."

The problem with describing foams mathematically has been that the evolution of a bubble cluster a few inches across depends on what's happening in the extremely thin walls of each bubble, which are thinner than a human hair.

"Modeling the vastly different scales in a foam is a challenge, since it is computationally impractical to consider only the smallest space and time scales," Saye said. "Instead, we developed a scale-separated approach that identifies the important physics taking place in each of the distinct scales, which are then coupled together in a consistent manner."

Saye and Sethian discovered a way to treat different aspects of the foam with different sets of equations that worked for clusters of hundreds of bubbles. One set of equations described the gravitational draining of liquid from the bubble walls, which thin out until they rupture. Another set of equations dealt with the flow of liquid inside the junctions between the bubble membranes. A third set handled the wobbly rearrangement of bubbles after one pops.

Using a fourth set of equations, the mathematicians solved the physics of a sunset reflected in the bubbles, taking account of thin film interference within the bubble membranes, which can create rainbow hues like an oil slick on wet pavement. Solving the full set of equations of motion took five days using supercomputers at the LBNL's National Energy Research Scientific Computing Center (NERSC).

The mathematicians next plan to look at manufacturing processes for small-scale new materials.

"Foams were a good test that all the equations coupled together," Sethian said. "While different problems are going to require different physics, chemistry and models, this sort of approach has applications to a wide range of problems."

The work is supported by the Department of Energy, National Science Foundation and National Cancer Institute.

Video: http://www.youtube.com/watch?feature=player_embedded&v=ciciWBz8m_Y

Source: http://feeds.sciencedaily.com/~r/sciencedaily/matter_energy/physics/~3/PK5ArTLDoOc/130509142100.htm

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Thursday, April 4, 2013

Facebook aims to take centerstage on Android phones

By Gerry Shih

MENLO PARK, California (Reuters) - Facebook Inc on Thursday unveiled its most ambitious attempt yet to enter mobile computing without a phone of its own, introducing a new app that replaces the home screen on some Android smartphones.

Called "Home," the new software lets users comprehensively modify Android, the popular mobile operating system developed by Google, to prominently display their Facebook newsfeed and messages on the home screens of a wide range of devices - while hiding other apps.

"Why do we need to go into those apps in the first place to see what's going on with those we care about?" Facebook Chief Executive Mark Zuckerberg told the hundreds of reporters and industry executives gathered at the company's Menlo Park campus.

"We want to bring all this content to the front."

The "Home" software will be available for download for free from Google Play starting April 12. In addition, AT&T Inc has exclusive rights to sell for $100 the first handsets, made by Taiwan's HTC Corp, that come pre-installed with the software starting the same day. France Telecom's Orange will be offering the phone in Europe.

Shares in Facebook finished trading up 82 cents, or 3.1 percent, at $27.07; Google stock closed at $795.07, down $11.13 or 1.38 percent.

Analysts say should the new software take off, it may begin to draw users away from Google services. Offering Facebook messaging, social networking and photos on the very first screen that Android users see could divert attention from the panoply of services, such as search and email, which generate advertising revue for Google.

Instead of traditional wallpaper or a "lock screen," users with Home installed will see a new Facebook "cover feed" that displays a rolling ticker-tape of photos, status updates - and eventually, ads - from Facebook's network.

Facebook's executives, acknowledging that messaging and communications remain the most fundamental use for smartphones, also showed off a new "chat heads" messaging interface, which would combine SMS text messages and Facebook chat messages under one tool.

"On one level, this is just next mobile version of Facebook," Zuckerberg said. "At a deeper level, this can start to be a change in the relationship with how we use these computing devices."

People who used the software and the HTC phone on Thursday appeared impressed by the highly visual design and interface that featured a multitude of pictures. But analysts say the jury is still out on whether Home has appeal beyond habitual Facebook users.

Some were skeptical consumers would leap at the chance to make Facebook so central to their lives.

"Facebook thinks it's more important to people than it actually is," said Charles Golvin, an analyst at Forrester Research.

Golvin said that in markets like Spain and Brazil, mobile users spend far more time in messaging apps like Whatsapp compared to the Facebook app.

"For the vast majority of people, Facebook just isn't the be-all and end-all of their mobile experience. It's just one part," he said. "I see a more apathetic response among Facebook users than Facebook might be expecting."

COMPETITION WITH GOOGLE

Facebook's wide-reaching mobile strategy could heighten its competition with Google, the dominant Internet search engine and the developer of Android with whom it is locked in a battle for Internet users' time online and for advertising dollars. But if it proves to be popular among Android users, Home could also place the two companies in something of an uneasy partnership.

More than 750 million mobile devices featuring Android have been activated to date, according to Google, more than gadgets based on Apple Inc's iOS, the runner-up.

Zuckerberg downplayed the rivalry even as he praised Google's willingness to let other companies tinker with Android. He said he was confident Google would not make changes to Android that would hamstring Facebook.

"If 20 percent of time people are spending on their phones is in Home, I really think they're going to have a hard time making a rational decision" to limit Home's functionality, Zuckerberg told reporters.

Google issued a neutral statement, saying the new phone demonstrated Android's openness.

"The Android platform has spurred the development of hundreds of different types of devices," the company said. "This latest device demonstrates the openness and flexibility that has made Android so popular."

Not everyone is sure that Google will remain neutral.

"Google has made Android open, but as they release the next version, are they going to be as open?" said Simon Mansell, the chief executive of TBG Digital, an advertising technology provider. "Facebook is hiding all the Google stuff with their own stuff, and how Google will respond is interesting."

For Facebook - founded in Zuckerberg's dorm room in 2004 as a website - bolstering its mobile presence is critical. Nearly 70 percent of Facebook members used mobile devices such as smartphones and tablets to access its service at the end of 2012, and 157 million of Facebook's roughly 1 billion users accessed the service solely on a mobile device.

The company has stepped up efforts to ensure that its revenue-generating ads can be viewed on mobile devices and Zuckerberg has said that the company's engineers are now focused on creating "mobile-first experiences."

Zuckerberg said features like cover feed will be ad-free initially, but he envisioned advertising as another form of content that will eventually be integrated. Analysts say the company treads cautiously when introducing ads into any of its services, wary of infuriating users.

"This is about becoming more deeply embedded in the operating system on mobile devices, and creating a broader platform," said Jan Dawson, chief telecoms analyst for the research firm Ovum. "It will allow Facebook to track more of a user's behavior on devices, and present more opportunities to serve up advertising."

But "that presents the biggest obstacle to success for this experiment: Facebook's objectives and users' are once again in conflict. Users don't want more advertising or tracking, and Facebook wants to do more of both."

Reports that Facebook was developing its self-branded smartphone have appeared sporadically and Zuckerberg has shot them down, as he did again on Thursday.

But with specialized software that adds a layer on top of Android, Facebook may get many of the benefits of having its own phone without the costs and risks of actually building a hardware device, analysts said.

"It's much lower risk than developing a phone or an operating system of its own, and if it turns out not to be successful, there will be little risk or loss to Facebook," Dawson said. "If it does turn out to be successful, Facebook can build on the model further and increase the value provided in the application over time."

(Writing by Edwin Chan; Editing by Gerald E. McCormick and Leslie Gevirtz)

Source: http://news.yahoo.com/facebook-showcases-home-software-google-android-phones-172903514--sector.html

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Bronze warship ram reveals secrets

Apr. 4, 2013 ? Analysis of a bronze battering ram from a 2000 year-old warship sheds light on how such an object would have been made in ancient times.

Known as the Belgammel Ram, the 20kg artefact was discovered by a group of British divers off the coast of Libya near Tobruk in 1964. The ram is from a small Greek or Roman warship -- a "tesseraria." These ships were equipped with massive bronze rams on the bow at the waterline and were used for ramming the side timbers of enemy ships. At 65cm long, the Belgammel Ram is smaller in size and would have been sited on the upper level on the bow. This second ram is known as a proembolion, which strengthened the bow and also served to break the oars of an enemy ship.

Leading marine archaeologist, Dr Nic Flemming a visiting fellow of the National Oceanography Centre, co-ordinated a team of specialists from five institutes to analyse the artefact before it was returned to the National Museum in Tripoli in May 2010. Their results have been published in the International Journal of Nautical Archaeology.

Dr Flemming said: "Casting a large alloy object weighing more than 20kg is not easy. To find out how it was done we needed specialists who could analyse the mix of metals in the alloys; experts who could study the internal crystal structure and the distribution of gas bubbles; and scholars who could examine the classical literature and other known examples of bronze castings.

"Although the Belgammel Ram was probably the first one ever found, other rams have since been found off the coast of Israel and off western Sicily. We have built a body of expertise and techniques that will help with future studies of these objects and improve the accuracy of past analysis."

Dr Chris Hunt and Annita Antoniadou of Queen's University Belfast used radiocarbon dating of burnt wood found inside the ram to date it to between 100 BC to 100 AD. This date is consistent with the decorative style of the tridents and bird motive on the top of the ram, which were revealed in detail by laser-scanned images taken by archaeologist Dr Jon Adams of the University of Southampton.

It is possible that during its early history the bronze would have been remelted and mixed with other bronze on one or more occasions, perhaps when a warship was repaired or maybe captured.

The X-ray team produced a 3-D image of the ram's internal structure using a machine capable of generating X-rays of 10 mevs to shine through 15cm of solid bronze. By rotating the ram on a turntable and making 360 images they created a complete 3-D replica of the ram similar to a medical CT scan. An animation of the X-rays has been put together by Dr Richard Boardman of m-VIS (mu-VIS), a dedicated centre for computed tomography (CT) at the University of Southampton.

Further analysis was carried out by geochemists Professor Ian Croudace, Dr Rex Taylor and Dr Richard Pearce at the University of Southampton Ocean and Earth Science (based at the National Oceanography Centre). Micro-drilled samples show that the composition of the bronze was 87 per cent copper, 6 per cent tin and 7 per cent lead. The concentrations of the different metals vary throughout the casting. Scanning Electron Microscopy, SEM, reveals that the lead was not dissolved with the other metals to make a composite alloy but that it had separated out into segregated intergranular blobs within the alloy as the metal cooled.

These results indicate the likelihood that the Belgammel Ram was cast in one piece and cooled as a single object. The thicker parts cooled more slowly than the thin parts so that the crystal structure and number of bubbles trapped in the metal varies from place to place.

The isotope characterisation of the lead component found in the bronze (an alloy of copper and tin) can be used as a fingerprint to reveal the origin of the lead ore used in making the metal alloy. Up until now, this approach has only provided a general location in the Mediterranean. But recent advances in the analysis technique means that the location can be identified with higher accuracy. The result shows that the lead component of the metal could have come from a district of Attica in Greece called Lavrion. An outcome of this improved technique means that the method can now be applied to other ancient metal artefacts to discover where the ore was sourced.

Micro-X-Ray fluorescence of the surface showed that corrosion by seawater had dissolved out some of the copper leaving it richer in tin and lead. It is significant that when comparing photographs from 1964 and 2008 there is no indication of change in the surface texture. This implies that the metal is stable and is not suffering from "Bronze Disease," a corrosion process that can destroy bronze artefacts.

The Belgammel Ram was found by a group of three British service sports divers off the coast of Libya at the mouth of a valley called Waddi Belgammel, near Tobruk. Using a rubber dinghy and rope they dragged it 25 metres to the surface. It was brought home to the UK as a souvenir but when the divers discovered that it was a rare antiquity, the ram was loaned to the Fitzwilliam Museum, Cambridge.

Ken Oliver is the only surviving member of that group of three and the effective owner. He decided in 2007 that is should be returned to a museum in Libya. With the help of the British Society for Libyan Studies this was arranged in 2010. During the intervening period Dr Nic Flemming invited experts to undertake scientific investigations prior to its return to Libya. These services were offered freely and would have cost many tens of thousands of pounds if conducted commercially. The team's objective was to understand how such a large bronze was cast, the history and composition of the alloy, its strength, how it was used in naval warfare, and how it survived 2000 years under the sea.

Since the Belgammel Ram was discovered, other rams have been found, some off the coast of Israel near Athlit, and more recently, off western Sicily. The latter finds look to be the remains of a battle site. On the 8th April there is a one-day colloquium hosted by the Faculty of Classics, University of Oxford, to discuss the finds of the Egadi Islands Project.

Nic Flemming continued: "We have learned such a huge amount from the Belgammel Ram and have developed new techniques which will help us unpick future mysteries.

"We will never know why the Belgammel Ram was on the seabed near Tobruk. There may have been a battle in the area, a skirmish with pirates. It could be that it was cargo from an ancient commercial vessel, about to be sold as salvage. The fragments of wood inside the ram show signs of fire, and we now know that partsof the bronze had been heated to a high temperature since it was cast which caused the crystal structure to change. The ship may have caught fire and the ram fell into the sea as the flames licked towards it. Some things will always remain a mystery. But we are pleased that we have gleaned so many details from this study that will help future work."

The Libyan uprising of 2011 resulted in many battles in the area around the museum. Fortunately the museum suffered no damage. The Belgammel Ram is safe.

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Story Source:

The above story is reprinted from materials provided by National Oceanography Centre, Southampton (UK).

Note: Materials may be edited for content and length. For further information, please contact the source cited above.


Journal Reference:

  1. Jonathan R. Adams, Annita Antoniadou, Chistopher O. Hunt, Paul Bennett, Ian W. Croudace, Rex N. Taylor, Richard B. Pearce, Graeme P. Earl, Nicholas C. Flemming, John Moggeridge, Timothy Whiteside, Kenneth Oliver, Anthony J. Parker. The Belgammel Ram, a Hellenistic-Roman BronzeProembolionFound off the Coast of Libya: test analysis of function, date and metallurgy, with a digital reference archive. International Journal of Nautical Archaeology, 2013; 42 (1): 60 DOI: 10.1111/1095-9270.12001

Note: If no author is given, the source is cited instead.

Disclaimer: Views expressed in this article do not necessarily reflect those of ScienceDaily or its staff.

Source: http://feeds.sciencedaily.com/~r/sciencedaily/strange_science/~3/SKbhmFPlIS0/130404122455.htm

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