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Black holes as particle detectors

[ Back to EurekAlert! ] Public release date: 18-Jun-2012
[ | E-mail | Share Share ]

Contact: Florian Aigner
florian.aigner@tuwien.ac.at
43-158-801-41027
Vienna University of Technology

Previously undiscovered particles could be detected as they accumulate around black holes say scientists at the Vienna University of Technology

This press release is available in German.

Finding new particles usually requires high energies that is why huge accelerators have been built, which can accelerate particles to almost the speed of light. But there are other creative ways of finding new particles: At the Vienna University of Technology, scientists presented a method to prove the existence of hypothetical "axions". These axions could accumulate around a black hole and extract energy from it. This process could emit gravity waves, which could then be measured.

Axions are hypothetical particles with a very low mass. According to Einstein, mass is directly related to energy, and therefore very little energy is required to produce axions. "The existence of axions is not proven, but it is considered to be quite likely", says Daniel Grumiller. Together with Gabriela Mocanu he calculated at the Vienna University of Technology (Institute for Theoretical Physics), how axions could be detected.

Astronomically Large Particles

In quantum physics, every particle is described as a wave. The wavelength corresponds to the particle's energy. Heavy particles have small wavelengths, but the low-energy axions can have wavelengths of many kilometers. The results of Grumiller and Mocanu, based on works by Asmina Arvanitaki and Sergei Dubovsky (USA/Russia), show that axions can circle a black hole, similar to electrons circling the nucleus of an atom. Instead of the electromagnetic force, which ties the electrons and the nucleus together, it is the gravitational force which acts between the axions and the black hole.

The Boson-Cloud

However, there is a very important difference between electrons in an atom and axions around a black hole: Electrons are fermions which means that two of them can never be in the same state. Axions on the other hand are bosons, many of them can occupy the same quantum state at the same time. They can create a "boson-cloud" surrounding the black hole. This cloud continuously sucks energy from the black hole and the number of axions in the cloud increases.

Sudden Collapse

Such a cloud is not necessarily stable. "Just like a loose pile of sand, which can suddenly slide, triggered by one single additional grain of sand, this boson cloud can suddenly collapse", says Daniel Grumiller. The exciting thing about such a collapse is that this "bose-nova" could be measured. This event would make space and time vibrate and emit gravity waves. Detectors for gravity waves have already been developed, in 2016 they are expected to reach an accuracy at which gravity waves should be unambiguously detected. The new calculations in Vienna show that these gravity waves can not only provide us with new insights about astronomy, they can also tell us more about new kinds of particles.

###



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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.


[ Back to EurekAlert! ] Public release date: 18-Jun-2012
[ | E-mail | Share Share ]

Contact: Florian Aigner
florian.aigner@tuwien.ac.at
43-158-801-41027
Vienna University of Technology

Previously undiscovered particles could be detected as they accumulate around black holes say scientists at the Vienna University of Technology

This press release is available in German.

Finding new particles usually requires high energies that is why huge accelerators have been built, which can accelerate particles to almost the speed of light. But there are other creative ways of finding new particles: At the Vienna University of Technology, scientists presented a method to prove the existence of hypothetical "axions". These axions could accumulate around a black hole and extract energy from it. This process could emit gravity waves, which could then be measured.

Axions are hypothetical particles with a very low mass. According to Einstein, mass is directly related to energy, and therefore very little energy is required to produce axions. "The existence of axions is not proven, but it is considered to be quite likely", says Daniel Grumiller. Together with Gabriela Mocanu he calculated at the Vienna University of Technology (Institute for Theoretical Physics), how axions could be detected.

Astronomically Large Particles

In quantum physics, every particle is described as a wave. The wavelength corresponds to the particle's energy. Heavy particles have small wavelengths, but the low-energy axions can have wavelengths of many kilometers. The results of Grumiller and Mocanu, based on works by Asmina Arvanitaki and Sergei Dubovsky (USA/Russia), show that axions can circle a black hole, similar to electrons circling the nucleus of an atom. Instead of the electromagnetic force, which ties the electrons and the nucleus together, it is the gravitational force which acts between the axions and the black hole.

The Boson-Cloud

However, there is a very important difference between electrons in an atom and axions around a black hole: Electrons are fermions which means that two of them can never be in the same state. Axions on the other hand are bosons, many of them can occupy the same quantum state at the same time. They can create a "boson-cloud" surrounding the black hole. This cloud continuously sucks energy from the black hole and the number of axions in the cloud increases.

Sudden Collapse

Such a cloud is not necessarily stable. "Just like a loose pile of sand, which can suddenly slide, triggered by one single additional grain of sand, this boson cloud can suddenly collapse", says Daniel Grumiller. The exciting thing about such a collapse is that this "bose-nova" could be measured. This event would make space and time vibrate and emit gravity waves. Detectors for gravity waves have already been developed, in 2016 they are expected to reach an accuracy at which gravity waves should be unambiguously detected. The new calculations in Vienna show that these gravity waves can not only provide us with new insights about astronomy, they can also tell us more about new kinds of particles.

###



[ 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.


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Easing of pot laws poses challenge for parents

In this June 12, 2012 photo, Trish Nixon, left, stands with her 21-year-old daughter, Krista Nixon, in Colorado Springs, Colo. Trish Nixon talks about the challenge she has faced over the years about marijuana. Nixon said the message to her daughter changed over the years, evolving from "It's against the law, don't do it," to a more nuanced message that takes into consideration medical marijuana and ballot initiatives to legalize the drug. Trish Nixon said her mother's message meshed with what she was learning through her friends, which included some who used marijuana. (AP Photo/P. Solomon Banda)

In this June 12, 2012 photo, Trish Nixon, left, stands with her 21-year-old daughter, Krista Nixon, in Colorado Springs, Colo. Trish Nixon talks about the challenge she has faced over the years about marijuana. Nixon said the message to her daughter changed over the years, evolving from "It's against the law, don't do it," to a more nuanced message that takes into consideration medical marijuana and ballot initiatives to legalize the drug. Trish Nixon said her mother's message meshed with what she was learning through her friends, which included some who used marijuana. (AP Photo/P. Solomon Banda)

This August 2011 photo provided by the family shows Sarena Haskins, center, with her children, Hannah, 12, at left, and Hayden, now 8, in Olympia, Wash. Sarena Haskins is a regular user of marijuana for medical reasons, as allowed by state law. But she is opposed to a measure on Washington?s Nov. 6 ballot that would legalize pot for recreational purposes, and advises Hannah not to experiment with it. (AP Photo/Kris Haskins)

In this June 12, 2012 photo, Trish Nixon, left, stands with her 21-year-old daughter, Krista Nixon, in Colorado Springs, Colo. Trish Nixon talks about the challenge she has faced over the years about marijuana. Nixon said the message to her daughter changed over the years, evolving from "It's against the law, don't do it," to a more nuanced message that takes into consideration medical marijuana and ballot initiatives to legalize the drug. Trish Nixon said her mother's message meshed with what she was learning through her friends, which included some who used marijuana. (AP Photo/P. Solomon Banda)

(AP) ? Michael Jolton was a young father with a 5-year-old son when Colorado legalized medical marijuana in 2000. Now he's got three boys, the oldest near adulthood, and finds himself repeatedly explaining green-leafed marijuana ads and "free joint" promotions endemic in his suburban hometown.

"I did not talk to my oldest son about marijuana when he was 8 years old. We got to talk about fun stuff. Now with my youngest who's 8, we have to talk about this," said Jolton, a consultant from Lakewood.

A marijuana opponent with a just-say-no philosophy, Jolton, 48, is among legions of American parents finding the "drug talk" increasingly problematic as more states allow medical marijuana or decriminalize its use. Colorado and Washington state have measures on their Nov. 6 ballot that would go a further step and legalize recreational use of marijuana for adults.

Parent-child conversations about pot "have become extraordinarily complicated," said Stephen Pasierb, president of the Partnership at Drugfree.org, which provides resources for parents concerned about youth drug use.

Legalization and medical use of marijuana have "created a perception among kids that this is no big deal," Pasierb said. "You need a calm, rational conversation, not yelling and screaming, and you need the discipline to listen to your child."

Ethan Nadelmann, executive director of the pro-legalization Drug Policy Alliance, says the family conversations "are becoming a lot more real" because most of today's parents likely tried marijuana themselves.

"Parents know a lot more about what they're talking about, and kids probably suspect that their parents did this when they were younger and didn't get in trouble with drugs," Nadelmann said. "There's still hypocrisy, but the level of honesty and frankness in the parent-child dialogue about marijuana is increasing every year."

The Haskins family of Olympia, Wash., provides a vivid example of how the conversations have evolved.

Sarena Haskins, 41, and her sister are both longtime users of pot for health reasons, and Sarena's 12-year-old daughter, Hannah, has become an advocate of medical marijuana to the point of posting a video online expressing her views.

Yet Sarena Haskins opposes the ballot measure that would legalize recreational use of pot in Washington and advises Hannah to avoid experimentation with the drug.

"I'm a little a little nervous about those conversations, but I'm having them now," Haskins said. "I tell Hannah it's not a smart choice, that she needs to focus on school ... You can't just be a pot head and be lazy."

Another longtime parent/pot user is Tim Beck, a Detroit insurance broker who succeeded in getting a marijuana legalization measure on the city's ballot for Nov. 6. The measure wouldn't supersede the state law against non-medical marijuana use, but would let adults possess small amounts of pot on private property without facing arrest under city ordinances.

Beck says his 17-year-old daughter, Maria, who is now studying at the Bolshoi Ballet Academy in Moscow, observed his pot smoking throughout her youth.

"I decided I wouldn't hide it ... no big deal, no lectures. It's something she grew up with," said Beck, 60. "I don't know whether she's tried marijuana or not, and I don't care. If we detect any evidence of dysfunctional behavior, which we never have, then we'd focus on that."

The legalization campaign grates on Yolanda Harden, 47, officer manager at a Detroit middle school who has raised five kids of her own and a dozen others from her circle of friends and family.

Harden said her own parents battled drug problems that started with marijuana use, and she tries to convey to the youths in her care they could risk the same fate.

But she finds it harder now to get that message through. "Because it's so popular, they truly believe it's harmless."

Michigan, Colorado and Washington are among 17 states where medical marijuana is legal. More than a dozen states, and many municipalities, have scrapped criminal penalties for small-scale pot possession or made it a low-priority crime for police.

In Colorado, hundreds of medical marijuana dispensaries and growers operate legally, and ads invite new patients to try their pot.

In Boulder, Colo., home to nation's largest college pro-marijuana protest each spring, city councilwoman KC Becker doesn't oppose Boulder's thriving marijuana business but realizes that, within her family, she'll have to approach the topic differently than her parents did.

"My parents definitely didn't talk to me about drugs, ever," Becker said. Marijuana legalization, she said, "does force you to talk about it and explain it ? but that's not necessarily bad."

What will Becker tell her 4-year-old when he learns to read the pot ads?

"I'll say, 'That's a store where people can get medicine to help them when they feel sick, but you have to be responsible in using it and old enough,'" Becker said.

In Portland, Ore., a 29-year-old mom found out the hard way that her kids needed more information.

Serra Frank uses marijuana to treat a bladder condition. When her 8-year-old son heard last fall in a school anti-drug campaign that marijuana harms the brain, he burst into tears and told school authorities he was scared because his mom uses pot.

Police came to their house, and Frank had some explaining to do ? to the authorities to prove she was using pot legally, and to her son.

"I tell him it's medicine. It helps with pain, but it's not for kids," Frank said.

Six years ago Frank created a Facebook page called Moms for Marijuana to ask advice from other marijuana users with children. The group now has some 17,000 online members and chapters in 40 states.

"Nobody really wants to talk about it," said Frank. "It's been ingrained into our brains that it's a bad, bad thing and we're supposed to be afraid of it."

Trish Nixon of Colorado Springs had two children living at home when Colorado legalized medical marijuana. She tackled the topic head-on, evolving from a "It's against the law ? don't do it" warning to a more nuanced message.

"I would explain why somebody might need to use it, the right reasons some people need it and why some people are using it for the wrong reasons," Nixon said.

Her daughter, Krista, now 21, said she never considered marijuana a big deal. "My generation just grew up with it," she said, though adding that she's never used it.

Gretchen Burns Bergman, a fashion show producer from San Diego, has two grown sons who struggled with heroin addiction, including one who served prison time. Founder of a group called Moms United to End the War on Drugs, she hopes more parents will support legalizing or decriminalizing marijuana as a relatively safe option compared to hard drugs.

"We've been talking down to our kids for far too long," she said. "It widens the divide if we say the stuff is just terrible, and they're not seeing the bad effects. It's just scare tactics, and they disbelieve us."

Indeed, marijuana activists make the case to parents that pot is less dangerous than alcohol.

In Colorado, the legalization campaign aired a television ad titled "Dear Mom," showing a young woman talking to her off-camera parents about marijuana.

"It's less harmful to my body, I don't get hung over, and honestly, I feel safer around marijuana users," she says.

Recent national surveys indicate that many teens view marijuana as relatively benign, with more of them now smoking pot then cigarettes.

Linda Pearlman Gordon, a psychotherapist from Chevy Chase, Md., who often counsels families, says a child's well-being ? rather than fear of arrest ? is increasingly likely to be the focus of parent/child conversations as the legalization drive continues.

She says parents should strive to discourage any drug usage that isolates a child socially or inhibits their maturation.

"It's troubling when anyone uses a substance to self-medicate, to push away difficult feelings," she said. "You want to make sure your child, if having difficult feelings, knows there are healthy ways to deal with it."

Stephen Pasierb of the Partnership at Drugfree.org says it's vital for parents to engage their children in relaxed discussions ? "See where your kid is at. Ask them, 'What do you think?'" ? and to do so before they reach middle school, where pot use is surging.

"Kids are willing to press all of mom's and dad's buttons, but they don't want to lose the ultimate respect of their parents," he said. "It's important for parents not to say, 'If you smoke marijuana, we'll throw you out of the house' but they should say they'll be disappointed."

His advice to parents who partook of pot in their youth:

"You should not lie to your child, but you don't owe them a blow by blow explanation of every party you went to."

___(equals)

Wyatt reported from Denver. Crary reported from New York. They can be followed on Twitter at http://twitter.com/APkristenwyatt and http://twitter.com/CraryAP

___(equals)

Online:

The Partnership at Drugfree.org: http://www.drugfree.org/

Moms for Marijuana: http://www.momsformarijuana.com/

Associated Press

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Islamist claims victory in Egypt president vote

FILE - In this Sunday, May 20, 2012 file photo, the Muslim Brotherhood's presidential candidate Mohammed Morsi holds a rally in Cairo, Egypt. The Muslim Brotherhood has declared that its candidate, Mohammed Morsi, won Egypt's presidential election, early Monday, June 18, 2012.(AP Photo/Fredrik Persson, File)

FILE - In this Sunday, May 20, 2012 file photo, the Muslim Brotherhood's presidential candidate Mohammed Morsi holds a rally in Cairo, Egypt. The Muslim Brotherhood has declared that its candidate, Mohammed Morsi, won Egypt's presidential election, early Monday, June 18, 2012.(AP Photo/Fredrik Persson, File)

A representative of Muslim brotherhood presidential candidate Mohammed Morsi, watches the counting ofballots at a polling center during the second day of the presidential runoff, in Cairo, Egypt, Sunday, June 17, 2012. Egyptians are choosing between a conservative Islamist and Hosni Mubarak's ex-prime minister in a second day of a presidential runoff that has been overshadowed by the domination of the country's military. (AP Photo/Amr Nabil)

Egyptian men line up to vote at a polling station in the Shobra neighborhood of Cairo, Egypt on Sunday, June 17, 2012. Egyptians are choosing on Sunday between a conservative Islamist and Hosni Mubarak's ex-prime minister in the second day of a presidential runoff that has been overshadowed by questions on whether the ruling military will transfer power to civilian authority by July 1 as promised. (AP Photo/Pete Muller)

Two Egyptian men sit under posters of presidential candidate Ahmed Shafiq at a traditional coffee shop during the second day of the presidential runoff in Cairo, Egypt Sunday, June 17, 2012. Egyptians are choosing between a conservative Islamist and Hosni Mubarak's ex-prime minister in a second day of a presidential runoff that has been overshadowed by the domination of the country's military. Arabic on the poster reads "Ahmed Shafiq, President for Egypt, Egypt is for all." (AP Photo/Nasser Nasser)

An Egyptian man smokes a water pipe under a poster of presidential candidate, Ahmed Shafiq at a traditional coffee shop during the second day of the presidential runoff in Cairo, Egypt Sunday, June 17, 2012. Egyptians are choosing between a conservative Islamist and Hosni Mubarak's ex-prime minister in a second day of a presidential runoff that has been overshadowed by the domination of the country's military. Arabic on the poster reads, "Ahmed Shafiq, President for Egypt, Egypt is for all." (AP Photo/Nasser Nasser)

(AP) ? The Muslim Brotherhood declared early Monday that its candidate, Mohammed Morsi, won Egypt's presidential election, which would be the first victory of an Islamist as head of state in the stunning wave of protests demanding democracy that swept the Middle East the past year. But the military handed itself the lion's share power over the new president, sharpening the possibility of confrontation.

With parliament dissolved and martial law effectively in force, the generals made themselves Egypt's lawmakers, gave themselves control over the budget and will determine who writes the permanent constitution that will define the country's future.

But as they claimed victory over Hosni Mubarak's last prime minister Ahmed Shafiq after a deeply polarizing election, the Brotherhood challenged the military's power grab. The group insisted on Sunday that it did not recognize the dissolution of parliament or the military's interim constitution ? or its right to oversee the drafting of a new one.

That pointed to a potential struggle over spheres of authority between Egypt's two strongest forces. The Brotherhood has campaigned on a platform of bringing Egypt closer to a form of Islamic rule, but the military's grip puts it in a position to block that. Instead any conflict would likely center on more basic questions of power.

In a victory speech at his campaign headquarters, Morsi clearly sought to assuage the fears of the large sector of Egyptians that the Brotherhood will try to impose stricter provisions of Islamic law. He said he seeks "stability, love and brotherhood for the Egyptian civil, national, democratic, constitutional and modern state" and made no mention of Islamic law.

"Thank God who led successfully us to this blessed revolution. Thank God who guided the people of Egypt to this correct path, the road of freedom, democracy," the bearded, 60-year-old U.S.-educated engineer declared.

He vowed to all Egyptians, "men, women, mothers, sisters, laborers, students ... all its political factions, the Muslims, the Christians" to be "a servant for all of them."

"We are not about taking revenge or settling scores. We are all brothers of this nation, we own it together, and we are equal in rights and duties."

The Brotherhood officials and supporters in the room were ebullient over the turn of fate: The fundamentalist group that was banned for decades and repeatedly subjected to crackdowns under Mubarak's rule now held the chair that their nemesis was ousted from by last year's 18 days of mass protests. The uprising was launched by secular, leftist young activists, joined only later by the Brotherhood's leadership as millions took to the street, seeking an end to the authoritarian, corrupt regime.

Now some in Brotherhood were ready to challenge the generals. "Down with military rule," the supporters chanted.

Final official results are not expected until Thursday. The Brotherhood's declaration was based on results announced by election officials at individual counting centers, where each campaign has representatives who compile the numbers and make them public before the formal announcement. The Brotherhood's early, partial counts proved generally accurate in last month's first round vote.

The group said Morsi took 51.8 percent of the vote to Shafiq's 48.1 percent out of 24.6 million votes cast, with 98 percent of the more than 13,000 poll centers counted. There was no immediate comment from the Shafiq campaign.

The Arab Spring uprisings have brought greater power to Islamists in the countries where longtime authoritarian leaders were toppled ? but Eygpt is the only one to have an Islamist president. The Islamist Ennahda party won elections in Tunisia for a national assembly and it leads a coalition government, but the president is a leftist. Libya's leadership remains in confusion and there is no president, though Islamists play a strong role, and an Islamist party is part of the coalition government in Yemen.

The question now will be how a Brotherhood president will get along with the military generals who have ruled since Mubarak fell on Feb. 11, 2011 and who will still hold powers that can potentially paralyze Morsi. The Brotherhood has reached accommodations with the generals at times over the past 16 months, as it struck deals with Mubarak's regime itself ? gaining it a reputation among critics as willing to sell out for a taste of authority.

But after a highly polarized presidential election and the miltary's arrogation of powers to itself, the Brotherhood presented itself as willing to get into a confrontation with the Supreme Council of the Armed Forces, the body of top generals headed by Field Marshall Hussein Tantawi, Mubarak's defense minister for 20 years.

Just before the election, the Supreme Council of the Armed Forces, which has ruled since Mubarak's fall, slapped de facto martial law on the country, giving military police and intelligence agents the right to arrest civilians for a host of suspected crimes, some as secondary as obstructing traffic. Then came Thursday's ruling by the Supreme Constitutional Court dissolving parliament, followed by the interim constitution declaration just after polls closed Sunday following two days of voting.

According to a copy of the document obtained by The Associated Press, the generals would be the nation's legislators and control the budget. They also will name the 100-member panel tasked with drafting a new constitution, thus ensuring the new charter would guarantee them a say in key policies like defense and national security as well as shield their vast economic empire from civilian scrutiny.

The president will be able to appoint a Cabinet and approve or reject laws.

Under the document, new parliament elections will not be held until a new constitution is approved, meaning an election in December at the earliest. In the constitution-writing process, the military can object over any articles and the Supreme Constitutional Court ? which is made up of Mubarak-era appointees ? will have final say over any disputes.

Earlier Sunday, the Brotherhood's speaker of parliament Saad el-Katatni met with the deputy head of the military council, Chief of Staff Gen. Sami Anan and told him the group does not recognize the dissolution of parliament, according to a Brotherhood statement that pointedly referred to el-Katatni by his title.

El-Katatni insisted the military could not issue an interim constitution and that the constituent assembly formed last week would meet in the "coming hours" to go ahead with its work in writing the permanent charter.

Still, the Brotherhood has no power to force recognition of the parliament-created constituent assembly, which already seems discounted after parliament's dissolution and is likely to be formally disbanded by a pending court ruling. Lawmakers are literally locked out of parliament, which is ringed by troops.

The generals, mostly in their 60s and 70s, owe their ranks to the patronage of Mubarak. All along, activists from the pro-democracy youth groups that engineered the anti-Mubarak uprising questioned the generals' will to hand over power, arguing that after 60 years of direct or behind-the-scenes domination, the military was unlikely to voluntarily relinquish its perks.

The presidential race was a bitter one.

Shafiq, a former air force commander and an admirer and longtime friend of Mubarak, was seen by opponents as an extension of the old regime that millions sought to uproot when they staged a stunning uprising that toppled the man who ruled Egypt for three decades.

Morsi's opponents, in turn, feared that if he wins, the Brotherhood will take over the nation and turn it into an Islamic state, curbing freedoms and consigning minority Christians and women to second-class citizens.

Trying to rally the public in the last hours of voting, the Brotherhood presented a Morsi presidency as the last hope to prevent total control by the military council of Mubarak-era generals.

"We got rid of one devil and got 19," said Mohammed Kanouna, referring to Mubarak and the members of the military council as he voted for Morsi after night fell in Cairo's Dar el-Salam slum. "We have to let them know there is a will of the people above their will."

But the prospect that the generals will still hold most power even after their nominal handover of authority to civilians by July 1 has deepened the gloom, leaving some feeling the vote was essentially meaningless.

"Things have not changed at all. It is as if the revolution never happened," Ayat Maher, a 28-year-old mother of three, said as she waited for her husband to vote in Cairo's central Abdeen district. She said she voted for Morsi, but did not think there was much hope for him.

"The same people are running the country. The same oppression and the same sense of enslavement. They still hold the keys to everything."

___

AP correspondents Hamza Hendawi and Maggie Michael contributed to this report.

Associated Press

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Microsoft patent app wants SMS-to-spreadsheet, so you can Excel while you excel

Microsoft patent app wants SMS-to-spreadsheet, so you can Excel while you excel

If you're too busy racking up commissions to submit your expense report, a Microsoft patent application might let you text that steak-dinner-schmoozefest straight to a spreadsheet in accounting. That's one use that pops to mind for the proposed invention, which which could permit text and multimedia messages to interact with Redmond's Office suite. It could then process that info and redirect the message or send you a reply, confirming your shenanigans. Now, how to justify that $1,500 bottle of cognac?

[Image Credit: Shutterstock]

Microsoft patent app wants SMS-to-spreadsheet, so you can Excel while you excel originally appeared on Engadget on Fri, 15 Jun 2012 10:54:00 EDT. Please see our terms for use of feeds.

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'; isRolloverShown = true; setHideTimer(MIN_DISPLAY_TIME); resetRollover(); WALMART.$("#ROLLOVER_PICKUP_HOUR").show(); WALMART.$("#ROLLOVER_PICKUP_HOUR").html( pickupHourInfo); WALMART.$('#ROLLOVER').wmBubble('position',{top:(y-114),left:x}); WALMART.$('#ROLLOVER').wmBubble('update',WALMART.$('#ROLLOVER').html()); WALMART.$('#ROLLOVER').wmBubble('show'); } else { pickupHourInfo = '

Please call for store hours.

'; isRolloverShown = true; setHideTimer(MIN_DISPLAY_TIME); resetRollover(); WALMART.$("#ROLLOVER_PICKUP_HOUR").show(); WALMART.$("#ROLLOVER_PICKUP_HOUR").html(pickupHourInfo); WALMART.$('#ROLLOVER').wmBubble('position',{top:(y-38),left:x}); WALMART.$('#ROLLOVER').wmBubble('update',WALMART.$('#ROLLOVER').html()); WALMART.$('#ROLLOVER').wmBubble('show'); } } function generateBusinessHourText(businessHour) { if (businessHour) { openTime = businessHour.openTime; closeTime = businessHour.closeTime; if ((openTime == '-1:-1 am' || openTime == '00:00 am') && closeTime == '00:00 am') { return 'Closed'; } else if (openTime == '00:00 am' && (closeTime == '11:59 pm' || closeTime == '-1:-1 am')) { return 'Open 24 hours'; } else { return openTime + ' ? ' + closeTime; } } } /* * This method added for VIBS project which used to show online price tooltip. */ function showOnlinePriceOverlayRollover(e) { var onliePriceTipContent = 'In-store prices vary from online prices - please visit your store for exact pricing. Online prices are not honored in our stores.' isRolloverShown = true; setHideTimer(MIN_DISPLAY_TIME); resetRollover(); WALMART.$('#ROLLOVER_OTHER_TEXT').show(); WALMART.$('#ROLLOVER_OTHER_TEXT').html(onliePriceTipContent); e = (e) ? e : ((event) ? event : "") WALMART.$('#ROLLOVER').wmBubble('position',{top:getY(e) - 25,left:getX(e)}); WALMART.$('#ROLLOVER').wmBubble('update',WALMART.$('#ROLLOVER').html()); WALMART.$('#ROLLOVER').wmBubble('show'); } var isRolloverShown = false; var rolloverIndex = 0; function showPreferredStoreRollover(e, ind) { var slapStoresData = WALMART.bot.stores; var spulStoresData = WALMART.spul.stores; var storesData = (typeof slapStoresData !== 'undefined' && slapStoresData && slapStoresData != '' && slapStoresData.stores != '') ? slapStoresData : spulStoresData; if (storesData != null && storesData.stores != null && storesData.stores != '' && (!isRolloverShown || rolloverIndex != ind)) { rolloverIndex = ind; isRolloverShown = true; setHideTimer(MIN_DISPLAY_TIME); e = (e) ? e : ((window.event) ? window.event : "") var el = e.target; var storeIndex = ind - 1; resetRollover(); if(storesData.stores[storeIndex]!= undefined && storesData.stores[storeIndex].address != undefined ){ WALMART.$('#ROLLOVER_CITY').show(); WALMART.$('#ROLLOVER_ADDR1').show(); WALMART.$('#ROLLOVER_ADDR2').show(); WALMART.$('#ROLLOVER_CITY').html( storesData.stores[storeIndex].address.city); WALMART.$('#ROLLOVER_ADDR1').html(storesData.stores[storeIndex].address.fullStreet); WALMART.$('#ROLLOVER_ADDR2').html(storesData.stores[storeIndex].address.city + ", " + storesData.stores[storeIndex].address.stateCode + " " + storesData.stores[storeIndex].address.zipCode); WALMART.$('#ROLLOVER').wmBubble('position',{top:findPosY(el) - 66,left:findPosX(el)}); WALMART.$('#ROLLOVER').wmBubble('update',WALMART.$('#ROLLOVER').html()); WALMART.$('#ROLLOVER').wmBubble('show'); } } } function showSelectedStoreRollover(e, city, fullstreet, zip, state) { // if (store!=null ){ //rolloverIndex=ind; isRolloverShown = true; setHideTimer(MIN_DISPLAY_TIME); e = (e) ? e : ((window.event) ? window.event : "") resetRollover(); WALMART.$('#ROLLOVER_CITY').show(); WALMART.$('#ROLLOVER_ADDR1').show(); WALMART.$('#ROLLOVER_ADDR2').show(); WALMART.$('#ROLLOVER_CITY').html(city);//store.address.city; WALMART.$('#ROLLOVER_ADDR1').html(fullstreet);//store.address.fullStreet; WALMART.$('#ROLLOVER_ADDR2').html(city + ", " + state + " " + zip); WALMART.$('#ROLLOVER').wmBubble('position', {top: getY(e),left: getX(e)}); WALMART.$('#ROLLOVER').wmBubble('update', WALMART.$('#ROLLOVER').html()); WALMART.$('#ROLLOVER').wmBubble('show'); } function showSOIRollover(e, desc) { showRollover(e, desc); } function hideRollover(e) { WALMART.$('#ROLLOVER').wmBubble('hide'); isRolloverShown = false; clearTimeout(hideTimer); } function resetRollover() { WALMART.$("#ROLLOVER_CITY").hide(); WALMART.$("#ROLLOVER_ADDR1").hide(); WALMART.$("#ROLLOVER_ADDR2").hide(); WALMART.$("#ROLLOVER_OTHER_TEXT").hide(); WALMART.$("#ROLLOVER_CLOSE").hide(); WALMART.$("#ROLLOVER_PICKUP_HOUR").hide(); } var hideTimer; function setHideTimer(elapseVal) { clearTimeout(hideTimer); hideTimer = setTimeout("hideRollover()", elapseVal); } var isOpera = (navigator.userAgent.indexOf('Opera') != -1); var isIE = (!isOpera && navigator.userAgent.indexOf('MSIE') != -1) function getX(e) { var posx; if (e.pageX) { posx = e.pageX; } else if (e.clientX) { posx = e.clientX; if (isIE) { posx += top.document.documentElement.scrollLeft + top.document.body.scrollLeft; } } return posx; } function getY(e, offset) { var defaultOffset = 66; var posy; if (e.pageY) { posy = e.pageY; } else if (e.clientY) { posy = e.clientY; if (isIE) { posy += top.document.documentElement.scrollTop + top.document.body.scrollTop; } } if (offset == undefined) { posy -= defaultOffset; } else { posy -= offset } return posy; } /*START S2S small format Changes */ function showExpressContentRollover(x, y) { expressStoreInfo = '

Our newest addition,

' +'

Walmart Express, delivers

' +'

Every Day Low Prices in a

' +'

small store that is easy to shop.

'; isRolloverShown = true; setHideTimer(MIN_DISPLAY_TIME); resetRollover(); WALMART.$("#ROLLOVER_OTHER_TEXT").show(); WALMART.$("#ROLLOVER_OTHER_TEXT").html(expressStoreInfo); WALMART.$('#ROLLOVER').wmBubble('position', {top:(y-85),left:x}); WALMART.$('#ROLLOVER').wmBubble('update', WALMART.$('#ROLLOVER').html()); WALMART.$('#ROLLOVER').wmBubble('show'); }/*END S2S small format Changes */

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    ', isDisplayable: true, isComingSoon: false ,isPreOrder: false, isPreOrderOOS: false, isRunout: false } ], attributeData: [ ], storeItemData: [ { upc: '', city: '', stockStatus: '', isSlapOutOfStock: '', isReplenishable: '', isNotAvailable: '', availabilityCode: '', price: '', isStoreS2SEligible: '', hasFedExStoresInTheArea: '', storeId: '', canAddToCart: '' } ] } addMethodsToDefaultItem(DefaultItem); VariantWidgetSelectorManager.setDefaultItem('C1I20607288', DefaultItem);

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The Acer 10.1" Aspire One AOD270-1606 Netbook PC is the ultimate fun, portable companion, bringing you performance and convenient connectivity in a festive design that adds color, energy and fun to your everyday! With powerful processing performance, effortless entertainment and seamless connectivity there's no limit to what you can do. Check your social networks, browse the Internet, read and send email, share photos, chat over webcam and enjoy a variety of media wherever you are.


Acer 10.1" Aspire One AOD270-1606 Netbook PC:

Key Features and Benefits:

  • Intel Atom N2600 processor
    1.60GHz, 1MB L2 Cache
  • 1GB DDR3 SDRAM system memory
    Allows you to do the computer basics of web surfing, emails and documents
  • 320GB hard drive
    Store 213,000 photos, 91,000 songs or 168 hours of HD video and more
  • 10/100 Fast Ethernet, 802.11b/g/n Wireless LAN
    Connect to a broadband modem with wired Ethernet or wirelessly connect to a Wi-Fi signal or hotspot with the 802.11b/g/n connection built into your PC
  • 10.1" CrystalBrite LED-backlit display
    Intel Graphics Media Accelerator with 64MB of dedicated graphics memory and support for Microsoft DirectX 9

Additional Features:
  • 0.3MP webcam with built-in microphone
  • 5-in-1 memory card reader
  • 3 x USB 2.0 ports, 1 x headphone jack, 1 x microphone jack, 1 x RJ-45 Ethernet port, 1 x VGA port, 1 x HDMI port with HDCP support
  • 3-cell lithium-ion battery, up to 4 h battery life

Software:
  • Genuine Microsoft Windows 7 Starter (To learn more about the features of Windows 7, click here)
  • Microsoft Office Starter 2010: Includes reduced functionality versions of Microsoft Word and Excel, with advertising. PowerPoint and Outlook are NOT included. Purchase Office 2010 today and get the most out of your new PC. (To learn more about the features of Office 2010, click here)
  • McAfee Internet Security Suite Trial
  • Acer eRecovery Management

Support and Warranty:
  • 1-year international travelers limited warranty
  • Restore discs are not included (unless specified by supplier). We recommend you use the installed software to create your own restore and backup DVD the first week you use the computer.

What's In The Box:
  • Power cord
  • 3-cell lithium-ion battery
  • Quick Start Guide

To see the manufacturer's specifications for this product, click here.

To see a list of our PC Accessories, click here.

Trade in your used computer and electronics for more cash to spend at Walmart. Good for your wallet and the environment - click here.

ENERGY STAR?
Products that are ENERGY STAR-qualified prevent greenhouse gas emissions by meeting strict energy efficiency guidelines set by the U.S. Environmental Protection Agency and the U.S. Department of Energy. The ENERGY STAR name and marks are registered marks owned by the U.S. government, as part of their energy efficiency and environmental activities.

Battery Type: Lithium Ion
Primary Color: Multi-Color
Multi Pack Indicator: No
Model No.: AOD270-1606
Shipping Weight (in pounds): 3.84
Product in Inches (L x W x H): 10.17?x?7.28?x?1.01
Walmart No.: 550428107

Acer Balloon Carnival 10.1" Aspire One AOD270-1606 Netbook PC with Intel Atom N2600 Processor and Windows 7 Starter 4 5 7 8

It is a NETbook, not a laptop Overall, I am extremely pleased with this netbook. It's light, small and speedy. It does its job. I installed Chrome as my browser and it's much faster than explorer. 06/12/2012

This computer is EXTREMELY SLOW!! I don't know much about computers & I wish I knew more before I bought this one. It takes websites forever to load. Unless you have all the time in the world to work & wait for websites, Excel worksheets & Word documents to load, spend more money & get another netbook! 05/16/2012

Depends on Your Needs I had this for less than a month before returning it. I read ALL the reviews and thought it would work for me but it didn't. PRO'S: It is definitely a decent computer and SO cute. I thought it was even prettier and nicer looking than any picture conveyed. It was easy to type on, super light, and never got hot, even after hours of non-stop use. It came with a starter version of word which worked great for typing essays and spreadsheets. CONS: It was way too slow for me. Slow to get on the internet, slow to go back and forth between different tabs (websites), and slow to go from document view to website view. But maybe I expected too much. I'm not patient and I am used to the lightning fast speed of my last two laptops. It dropped internet signal a lot, almost daily. I'd have to go upset and reset my router and then it would be up again. I didn't have that problem before or after this Acer, with three other laptops. That was not acceptable. Also, even though I bought it for the size and light weight, it ended up being much too small. For a college student writing reports, it was too frustrating to constantly have to scroll to see any decent amount of the paper I was working on.I think it would be a great computer for a teenager, or someone who is not using it as their sole computer. Good luck. I am saving for a slightly bigger and much faster one. I never had a problem with my HP or Dell. Hope this helps. 06/09/2012

5-8 of 8 total reviews

Protect itWalmart Product Care Plans

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Hawking Is First User of "Big Brain" Supercomputer

I never expected Germaine Greer to be used on this board.
Regardless of the impression given, there is a need for celebrity scientists. Second rate scientist with a first rate promotional skill is just what the TV needs. Plus the promotion time couldn't be better spent in the lab either.
These people inspire the young to become scientists and raise public awareness for what ever cause made the news that week.

How on earth did you bring Germaine Greer into this? That's wonderful..

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