37 foreigners killed in Algeria hostage crisis: PM

ALGIERS: Thirty-seven foreigners of eight different nationalities were killed during the hostage crisis at an Algerian gas plant that was overrun by Islamist gunmen, Prime Minister Abdelmalek Sellal said on Monday.

"Thirty-seven foreigners of eight different nationalities," were killed during the four-day siege, Sellal told a news conference in Algiers, without specifying their nationalities.

One Algerian also lost his life, bringing the giving an overall toll of 38, while five foreigners were still missing, he added.

Among those that other official sources have already confirmed to have died in the siege were one Frenchman, one American, two Romanians, three Britons, six Filipinos and seven Japanese.

During the army's final assault on the plant, Sellal said the remaining gunmen executed several hostages by shooting them in the head.

The interior ministry had on Saturday given a preliminary toll of 23 foreign and Algerian hostages killed during the siege, which ended on Saturday with Algerian forces storming the remaining part of the complex still in militant hands.

The ministry said 685 Algerian and 107 foreign hostages were freed.

Sellal also said that the 32 militants who overran the In Amenas gas facility, taking hundreds of workers hostage, came from northern Mali. Twenty-nine of them were killed and three arrested.

He said the group's leader was Mohamed el-Amine Bencheneb, an Algerian militant known to the country's security services, and that he was killed during the army's assault.

As well as the three Algerians among them, the kidnappers had six foreign nationalities, namely Canadian, Egyptian, Tunisian, Malian, Nigerian and Mauritanian.

- AFP/xq

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Get a 50-inch Sceptre HDTV for $399

Now that this year's Super Bowl teams have been decided (and who doesn't love a battle of brothers?), perhaps you're ready for a big new TV on which to enjoy the game.

For a limited time, and while supplies last, TigerDirect has the Sceptre X508BV-FHD 50-inch LCD HDTV for $399.99, plus around $30 for shipping. That's your after-rebate price, but, hey, some deals require a little delayed gratification.

As you might expect from the price, this is an entry-level TV. It's not especially thin, and it lacks apps and Wi-Fi and all that (though that's easily remedied with an inexpensive Roku box). It has a 60Hz refresh rate, which I'll take any day over 120-240Hz and the "soap opera effect" that lends.

Other key specs include three HDMI inputs, an 8ms response time, and, of course, 1080p resolution. Sceptre backs the unit with a one-year warranty.

As for the rebate, it's good as long as you make your purchase before Jan. 26, and it comes in the form of a prepaid Amex card. Here's the PDF.

With a TV like this, I think it's wise to look closely at user reviews. There are nearly two dozen of them at TigerDirect, with an average rating of 4.3 stars out of 5. That would be good enough for me to pull the trigger, were I in the market for a TV.

If you are, let me know if you think this is the deal to beat, or whether it's worth spending more to get a thinner design and more frills.

Deals found on The Cheapskate are subject to availability, expiration, and other terms determined by sellers.

Curious about what exactly The Cheapskate does and how it works? Read our FAQ.

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Attack at Algeria Gas Plant Heralds New Risks for Energy Development

The siege by Islamic militants at a remote Sahara desert natural gas plant in Algeria this week signaled heightened dangers in the region for international oil companies, at a time when they have been expanding operations in Africa as one of the world's last energy frontiers. (See related story: "Pictures: Four New Offshore Drilling Frontiers.")

As BP, Norway's Statoil, Italy's Eni, and other companies evacuated personnel from Algeria, it was not immediately clear how widely the peril would spread in the wake of the hostage-taking at the sprawling In Amenas gas complex near the Libyan border.

Map by National Geographic

Algeria, the fourth-largest crude oil producer on the continent and a major exporter of natural gas and refined fuels, may not have been viewed as the most hospitable climate for foreign energy companies, but that was due to unfavorable financial terms, bureaucracy, and corruption. The energy facilities themselves appeared to be safe, with multiple layers of security provided both by the companies and by government forces, several experts said. (See related photos: "Oil States: Are They Stable? Why It Matters.")

"It is particularly striking not only because it hasn't happened before, but because it happened in Algeria, one of the stronger states in the region," says Hanan Amin-Salem, a senior manager at the industry consulting firm PFC Energy, who specializes in country risk. She noted that in the long civil war that gripped the country throughout the 1990s, there had never been an attack on Algeria's energy complex. But now, hazard has spread from weak surrounding states, as the assault on In Amenas was carried out in an apparent retaliation for a move by French forces against the Islamists who had taken over Timbuktu and other towns in neighboring Mali. (See related story: "Timbuktu Falls.")

"What you're really seeing is an intensification of the fundamental problem of weak states, and empowerment of heavily armed groups that are really well motivated and want to pursue a set of aims," said Amin-Salem. In PFC Energy's view, she says, risk has increased in Mauritania, Chad, and Niger—indeed, throughout Sahel, the belt that bisects North Africa, separating the Sahara in the north from the tropical forests further south.

On Thursday, the London-based corporate consulting firm Exclusive Analysis, which was recently acquired by the global consultancy IHS, sent an alert to clients warning that oil and gas facilities near the Libyan and Mauritanian borders and in Mauritania's Hodh Ech Chargui province were at "high risk" of attack by jihadis.

"A Hot Place to Drill"

The attack at In Amenas comes at a time of unprecedented growth for the oil industry in Africa. (See related gallery: "Pictures: The Year's Most Overlooked Energy Stories.") Forecasters expect that oil output throughout Africa will double by 2025, says Amy Myers Jaffe, executive director of the energy and sustainability program at the University of California, Davis, who has counted 20 rounds of bidding for new exploration at sites in Africa's six largest oil-producing states.

Oil and natural gas are a large part of the Algerian economy, accounting for 60 percent of government budget revenues, more than a third of GDP and more than 97 percent of its export earnings. But the nation's resources are seen as largely undeveloped, and Algeria has tried to attract new investment. Over the past year, the government has sought to reform the law to boost foreign companies' interests in their investments, although those efforts have foundered.

Technology has been one of the factors driving the opening up of Africa to deeper energy exploration. Offshore and deepwater drilling success in the Gulf of Mexico and Brazil led to prospecting now under way offshore in Ghana, Mozambique, and elsewhere. (See related story: "New Oil—And a Huge Challenge—for Ghana.") Jaffe says the Houston-based company Anadarko Petroleum has sought to transfer its success in "subsalt seismic" exploration technology, surveying reserves hidden beneath the hard salt layer at the bottom of the sea, to the equally challenging seismic exploration beneath the sands of the Sahara in Algeria, where it now has three oil and gas operations.

Africa also is seen as one of the few remaining oil-rich regions of the world where foreign oil companies can obtain production-sharing agreements with governments, contracts that allow them a share of the revenue from the barrels they produce, instead of more limited service contracts for work performed.

"You now have the technology to tap the resources more effectively, and the fiscal terms are going to be more attractive than elsewhere—you put these things together and it's been a hot place to drill," says Jaffe, who doesn't see the energy industry's interest in Africa waning, despite the increased terrorism risk. "What I think will happen in some of these countries is that the companies are going to reveal new securities systems and procedures they have to keep workers safe," she says. "I don't think they will abandon these countries."

This story is part of a special series that explores energy issues. For more, visit The Great Energy Challenge.

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LIVE UPDATES: President Obama's Big Day

Four years and one day after President Obama first took his first oath of office, America is once again celebrating his Inauguration. This time the schedule includes performances by Beyonce and Katy Perry, a parade with more than 2,000 members of the military and two Inaugural balls.

Refresh here for updates throughout the day.

Tune in to the ABC News.com Live page on Monday morning starting at 9:30 a.m. EST for all-day live streaming video coverage of Inauguration 2013: Barack Obama. Live coverage will also be available on the ABC News iPad App and mobile devices.

Read Obama’s first Inaugural address here.

All times are in Eastern Standard Time.

11:50 a.m. – Obama Takes Oath for Fourth Time

(Image Credit: ABC NEWS)

With his hand on two Bibles held by his two daughters, President Barack Obama took the inaugural oath for a fourth time. Supreme Court Chief Justice John Roberts administered the oath.

11:38 a.m. – Evers-Williams Delivers Invocation

11:33 a.m. – ABC Correspondent Tweets from Pakistan

11:30 a.m. – Ryan Congratulates Obama

ABC’s Elizabeth Hartfield reports:

No word from Mitt Romney, but his running mate, Rep. Paul Ryan sent out a congrats to President Obama.

Ryan posted a longer congratulations on his Facebook page.

I congratulate President Obama on his inauguration, and I join the country in celebrating this American tradition.

The president and I were political opponents. We had strong disagreements over the direction of the country—as we still do now. But today, we put those disagreements aside. Today, we remember what we share in common.

We serve the same country, one that is still in need of repair—and is still the freest on earth. We serve alongside men and women from both parties, who govern in good faith and good will. Finally, we serve the same people, who have honored us with their charge.

We may disagree on matters of policy. But today we remember why we take those matters so seriously—because we seek the public good. It’s our highest duty—one that we share—and one for which we’re grateful.

I’m happy to mark this historic occasion—for the president and for the country. And I look forward to tackling the big challenges ahead.

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11:20 a.m. – A Look Back at Obama’s First Inaugural Address

ABC’s Elizabeth Hartfield reports:

As Obama’s prepares to give his second inaugural address, a look back at the first: Obama’s speech in 2009 ran 2,395 words.

According to a handy word count breakdown from the Wall Street Journal, Obama used the word “people” eight times, the word “God” five times, and the word “government” four times. We can expect that those words will pop up again in today’s speech, as the president is expected to talk about unity and finding common ground among our nation’s leaders.

A word he only uttered once in 2009, that we might expect him to bring up again more this time- “war” – as the president looks back on the drawdown of America’s military presence in Iraq, and ahead to the drawdown in Afghanistan.

Today’s speech is expected to be shorter than his speech four years ago – but by how much will remain to be seen. The high bar of second inauguration speeches is Abraham Lincoln’s address in 1965- where he managed to say a lot, in just a few words- 698 to be exact.

11:16 a.m. – Obama Enters Arena

President Obama has entered the Capitol. Vice President Joe Biden and House Minority Leader Nancy Pelosi are close behind.

ABC’s Michael Falcone points out President Obama will be getting down to business shortly after he delivers his second inaugural address, officially submitting the names of his nominees for the posts of CIA Director, Secretary of Defense, Secretary of State and Secretary of the Treasury, according to a White House official.

Today, at the Capitol the President will be signing:

1. A Proclamation to commemorate the inauguration titled, “National Day of Hope and Resolve, 2013.”
2. Four Nominations:
a. John Owen Brennan to be Director of the CIA
b. Charles Timothy Hagel to be Secretary of Defense
c. John Forbes Kerry to be Secretary of State
d. Jacob J. Lew to be Secretary of the Treasury

ABC’s Devin Dwyer notes that four years ago, Obama signed a similar proclamation and nominations to the Senate. This occurs in the President’s Room, just off the Senate chamber, immediately following the address.

11:15 a.m. –

11:08 a.m. – The Biden Family Bible

A large Bible being carried in is attracting some attention for its size. The Bible belongs to the Biden family, and it’s the one Vice President Joe Biden will use to swear his oath of office, as he did four years ago.

The 120-year-old book has a Celtic cross on the front and has been passed down through the Biden clan. It is 5 inches thick, according to the Presidential Inaugural Committee.

Biden also used it Sunday in his private swearing-in ceremony at the Naval Observatory.

Carolyn Kaster/AP Photo

11:04 a.m. – Powell Slams GOP’s ‘Idiot Presentations’

ABC’s Michael Falcone reports:

In an interview with ABC’s Diane Sawyer and George Stephanopoulos during ABC’s special inauguration day coverage this morning, former Secretary of State Colin Powell lashed out at people in the Republican Party who spent the last four years spreading “birther nonsense” and other “things that demonize the president,” calling on GOP leaders to denounce such talk — publicly.

“Republicans have to stop buying into things that demonize the president. I mean, why aren’t Republican leaders shouting out about all this birther nonsense and all these other things? They should speak out. This is the kind of intolerance that I’ve been talking about where these idiot presentations continue to be made and you don’t see the senior leadership of the party say, ‘No, that’s wrong.’ In fact, sometimes by not speaking out, they’re encouraging it. And the base keeps buying the stuff.

“And it’s killing the base of the party. I mean, 26 percent favorability rating for the party right now. It ought to be telling them something. So, instead of attacking me or whoever speaks like I do, look in the mirror and realize, ‘How are we going to win the next election?”

Read more from Falcone here.

10:59 a.m. – Former President Carter Enters

Thirty-ninth President Jimmy Carter and his wife, Rosalynn, entered the Capitol to applause from the crowd. The former president shook hands and exchanged greetings with others awaiting President Obama. Carter is 88 years old and one of two former presidents expected at today’s ceremony.

The second, former President Bill Clinton, entered moments later with Sec. of State Hillary Clinton by his side.

10:56 a.m. – How to Crash a Party

Not invited to any of the official inaugural shindigs? No sweat.

ABC’s Chris Good got the scoop on how to sneak into the festivities from Fred Karger, former 2012 Republican presidential candidate and self-proclaimed party-crasher extraordinaire.

“Karger says he has crashed an inauguration party before, plus the Oscars and Fashion Week. He has fooled rope-line workers, he says, and even the Secret Service,” Good reports.

“He twice found himself onstage at the Oscars, he says, once singing the final number alongside Liza Minnelli.”

A few of Karger’s tips: call ahead under a fake name, blend in with the entourage and don’t look back. Find all of Karger’s tips and more reporting from Chris Good here.

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10:52 a.m. – Presidential Limo: Belly of the Beast

President Obama got an upgraded presidential limo when he took office four years ago.

Pierre Thomas got an exclusive look at the unveiling back then. Take a look:

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10:41 a.m. – POTUS Departs

(Image Credit: DC Vote)

President Obama has left the White House and entered his motorcade, on the way to the Capitol.

The president’s limo is sporting special plates today, in support of the D.C. statehood movement. Read more about those plates here.

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10:39 a.m. – First Lady and Vice President on Their Way

First lady Michelle Obama left the White House, followed shortly by Vice President Joe Biden.

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10:34 a.m. – Obamas Leave White House

President Obama’s daughters, Sasha and Malia, left the White House in their pink and purple coats just a moment ago. They’re headed for the Capitol, where they will watch their father take the presidential oath for the fourth time.

They were followed minutes later by a band of Marines, then by Dr. Jill Biden, Vice President Joe Biden’s wife.

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10:31 a.m. – Events Heating Up

Members of Congress can be seen streaming into the Capitol. The inaugural pre-show began at 9:30 a.m., but Sen. Chuck Schumer, D-N.Y., won’t begin introducing the president for another hour.

Across the National Mall, attendees are waving American flags, in a sea of red, white and blue.

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10:17 a.m. – Presidential Imperfections

It’s a not-so-secret understanding that even the most well-respected president’s weren’t perfect. Turns out neither were their inaugural ceremonies.

Find the funniest and quirkiest inaugural slip ups here.

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9:58 a.m. – How Do You Spell the Event of the Day?

(Image Credit: Joanna Stern / ABC News)

ABC’s Joanna Stern reports:

Nope, it’s not inaugration. Not inaguration either. Inaugiration? Not correct. And it’s definitely not innoguration or anauguration.

Inauguration. That’s the correct spelling of the word for that big event today, at which, you know, the president officially becomes the president again.

But don’t be embarrassed if you spelled it incorrectly. It turns out it’s a pretty popular thing to do.

Over 2,500 people have tweeted about the “inaguration,” according to Topsy, which tracks tweets on Twitter. Topsy says 866 of those tweets have been in the last 30 days. “Inaugration” has been used in over 700 tweets.

Read more from Stern on the many misspellings of this historic event here.

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9:42 a.m. – Obamas on the Move

The Obama family has left church services at St. John’s Episcopal Church and headed back to the White House.

To see where the president will go next, check out ABC’s interactive map here.

Pastor Andy Stanley from the North Point Community Church in Alpharetta Georgia delivered the sermon, according to pool reports, calling the president “pastor in chief.”

This tweet from the president posted while the Obama family was still in church.

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9:15 a.m. – Obama’s View

ABC’s Jonathan Karl is on the platform at the West Front of the Capitol Building where Obama will give his inaugural address later today. He’s got the best view of the crowds, which won’t come close to the 1.8 million of four years ago, but which already number hundreds of thousands.

9:11 a.m. – Members of Congress Honor MLK on Twitter

Today America remembers the legacy of another great leader: Martin Luther King, Jr. Members of the House and Senate are taking to Twitter to express their admiration for King this morning.

9:04 a.m. – On the Ground with Good Morning America.

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9:03 a.m. – Best and Worst Inaugural Addresses

(Image Credit: Getty Images)

ABC’s Chris Good reports on the best and worst inaugural speeches of all time:

Inaugural addresses, it is said, are usually not very good. Most have been long forgotten, and historians themselves point to few as memorable.

It’s not entirely clear why, but the moment might have something to do with it. Book-ending divisive national campaigns, inaugural addresses offer token unity sentiments, hopefulness but not always specific hopes, and even some good ones sound myopic.

“Most inaugural addresses are not remembered,” said Princeton University professor and noted presidential historian Eric Foner. “Grover Cleveland? I have no idea what he said in his.”

“I have actually read every single inaugural, and it was a really boring experience,” said Robert Lehrman, a former speechwriter for vice president Al Gore, who now teaches the craft at American University in Washington. “Most of the speeches are terrible. Even the ones we remember, I don’t think there is any reporter working anywhere that couldn’t write language as crisp or concrete as the majority of them.”

Read the rest of the worst and the best here.

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8:56 a.m. – Outfits of the Inauguration: Obama Style

ABC’s Mary Bruce reports:

The President, First Lady, in a dark blue jacket, and daughters Malia, in a pink overcoat, and Sasha, in dark purple, arrived just after 8:40 a.m. at St. John’s Episcopal Church for morning services.

The First Lady is wearing a navy Thom Browne coat and dress. The fabric was developed based on the style of a man’s silk tie. The belt she is wearing is from J.Crew and her earrings are designed by Cathy Waterman. She is also wearing J.Crew shoes. At the end of the Inaugural festivities, the outfit and accompanying accessories will go to the National Archives.

Malia Obama is wearing a J.Crew ensemble. Sasha Obama is wearing a Kate Spade coat and dress.

The Bidens arrived moments later.

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8:47 a.m. – Tailor to the Presidents: Republicans Dress Better

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8:45 a.m. – Great American Quotes

Inaugural addresses are an opportunity for presidents on the nation’s front lawn – a place that Americans come to in turns inaugurate their leaders, protest their government and mourn their dead – to place a marker for their legacy.

There have been some weighty and remarkable things said as presidents took the oath of office looking down on the Mall and also, from nearby, as other Americans have looked up and let their voices be heard at gatherings as varied as the March on Washington and the Promise Keepers.

What can Barack Obama say, come Monday, as he begins a second term with lower expectations and less inspiration, to place himself on this list of great American words?

Click below for an interactive look at the competition:

(Image Credit: ABC News: Ma'ayan Rosenzweig)

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8:38 a.m. – Aretha Franklin’s Hat Makes a Comeback

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8:22 a.m. – Martha Raddatz: Women Rule

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8:08 a.m. – Eva Longoria Wakes Up to with the White House

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Curated by ABC’s Z. Byron Wolf and Sarah Parnass

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Turn up the bass to scare birds away from planes

PLANES and birds aren't good at sharing air space - bird strikes worldwide cause over a billion dollars in damage every year, and put passengers and crew at risk. To scare avians away, a new device will fire low-frequency sound waves at flocks as they near busy flight paths.

Noise makers are often used to scare birds away from airports or contaminated waterways. But loud sounds also annoy any humans within earshot.

Now a system developed by Technology International, based in Laplace, Louisiana, aims to deter birds using infrasound, below the range of human hearing.

The trial version of the Avian Infrasound Non-lethal Denial System has a passive infrasound detector that listens for an approaching flock, and activates a series of rotary subwoofers that generate high-intensity, but low-frequency sound. It worked well in tests.

Thunderstorms also emit lots of infrasound, which may be why birds are naturally averse to it, says Abdo Husseiny, the firm's CEO.

Husseiny adds that the system could be used to keep pigeons away from public squares, or divert flocks away from wind turbines. He says that the equipment should be commercially available within two years.

If you would like to reuse any content from New Scientist, either in print or online, please contact the syndication department first for permission. New Scientist does not own rights to photos, but there are a variety of licensing options available for use of articles and graphics we own the copyright to.

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No more measures for Greece if reforms carried out: Lagarde

ATHENS: No additional measures would be necessary for Greece if it carries out the reforms under its bailout programme, IMF chief Christine Lagarde said in an interview with the Sunday edition of Kathimerini.

"But if the structural reforms are not carried out... then more cuts would be necessary," the head of the International Monetary Fund told the Greek newspaper.

Entering a sixth year straight of recession, the heavily indebted country is relying on EU-IMF bailout packages.

It also received a private-sector debt cut early last year. Since 2010, the EU and IMF have committed 240 billion euros ($320 billion) in rescue loans to Greece, while last week the IMF unblocked a frozen tranche of 3.2 billion euros from its pending aid package.

"Greece holds its future in its own hands... It is up to the country itself to succeed in its programme," Lagarde said.

The IMF chief said she had a very good working relationship with both the Greek prime minister and finance minister.

Prime Minister Antonis Samaras and I "have a very good and honest relationship," she said, adding that the premier has even "surprised" her with his stance following his election.

Lagarde also said she believed the co-existence of three different parties in Greece's coalition government is beneficial.

"Regarding the implementation of the programme and the responsibilities towards the people, a wide coalition is much more important than a tight majority," she said.

Conservative Prime Minister Antonis Samaras's coalition government has lost 16 deputies since coming to power in June, as a result of opposition to continued austerity.

It now counts a majority of 163 seats out of an overall 300.

On Friday, the IMF's mission chief for Greece Poul Thomsen said the country will still need additional help from its European partners next year.

- AFP/fa

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How to buy a hi-fi

The first question is, what do you want from your hi-fi? Do you want to play LPs, CDs, or an occasional movie? Next, where will you put the speakers, and how large or small do they need to be? I'm writing this blog for folks trying to put together the best sounding hi-fi they can on a fixed budget. That's why I won't be covering wireless systems, because dollar for dollar, the better wired speakers always sound better than wireless models.

Setting the budget is the next logical step. I've written about an amazing-for-the-money $70 hi-fi system, but if you really love music investing $1,000 on a system would be a great place to start. Put roughly half into the speakers, and the other half into the amplifier and digital-to-analog converter/CD player, or turntable. If you're lucky enough to have a brick-and-mortar shop nearby, go listen to some gear. Better yet, call ahead and talk with a salesperson and discuss your needs. Bring some of your favorite music to the store; it really helps to audition gear with music you know best.

If you can't audition gear, read reviews. Rather than try to research a wide range of products on the market, narrow your focus as much as possible. For example, search for tower speakers for under $500 a pair, a stereo receiver for under $300, and a USB digital-to-analog converter for $200 or less.

Some hi-fi shoppers waste a lot of time trying to find "the best" speaker, amp, turntable, and so forth. There's no such thing as a "best" that everyone agrees on; there are too many variables to consider. With speakers you have to factor in room size, speaker size, placement restrictions, bass capability, how loud do the speakers need to play, what kind of amp will the speakers be partnered with, what kind of music will be played, and the speaker's appearance. So one person's best $500 speaker might be completely unacceptable to other buyers. I'm unaware of any universally praised speakers, and if you can't listen to a speaker before you buy it, you have to let other people -- reviewers or users -- be your guides.

With amps or receivers you again need to focus on your needs, what features you require, how much power you need, and your budget. The same logic applies to turntables: what features do you need?

So we're back where we started, determining what's important for your system will eliminate a lot of choices. Once you narrow your focus as much as possible, it will be a lot easier to decide what to buy.

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Earth may be crashing through dark matter walls

Earth is constantly crashing through huge walls of dark matter, and we already have the tools to detect them. That's the conclusion of physicists who say the universe may be filled with a patchwork quilt of force fields created shortly after the big bang.

Observations of how mass clumps in space suggest that about 86 per cent of all matter is invisible dark matter, which interacts with ordinary matter mainly through gravity. The most popular theory is that dark matter is made of weakly interacting massive particles.

WIMPs should also interact with ordinary matter via the weak nuclear force, and their presence should have slight but measurable effects. However, years of searches for WIMPs have been coming up empty.

"So far nothing is found, and I feel like it's time to broaden the scope of our search," says Maxim Pospelov of the University of Victoria in Canada. "What we propose is to look for some other signatures."

Bubbly cosmos

Pospelov and colleagues have been examining a theory that at least some of the universe's dark matter is tied up in structures called domain walls, akin to the boundaries between tightly packed bubbles. The idea is that the hot early universe was full of an exotic force field that varied randomly. As the universe expanded and cooled, the field froze, leaving a patchwork of domains, each with its own distinct value for the field.

Having different fields sit next to each other requires energy to be stored within the domain walls. Mass and energy are interchangeable, so on a large scale a network of domain walls can look like concentrations of mass – that is, like dark matter, says Pospelov.

If the grid of domain walls is packed tightly enough – say, if the width of the domains is several hundred times the distance between Earth and the sun – Earth should pass through a domain wall once every few years. "As a human, you wouldn't feel a thing," says Pospelov. "You will go through the wall without noticing." But magnetometers – devices that, as the name suggests, measure magnetic fields – could detect the walls, say Pospelov and colleagues in a new study. Although the field inside a domain would not affect a magnetometer, the device would sense the change when Earth passes through a domain wall.

Dark matter walls have not been detected yet because anyone using a single magnetometer would find the readings swamped by noise, Pospelov says. "You'd never be able to say if it's because the Earth went through a bizarre magnetic field or if a grad student dropped their iPhone or something," he says.

Network needed

Finding the walls will require a network of at least five detectors spread around the world, Pospelov suggests. Colleagues in Poland and California have already built one magnetometer each and have shown that they are sensitive enough for the scheme to work.

Domain walls wouldn't account for all the dark matter in the universe, but they could explain why finding particles of the stuff has been such a challenge, says Pospelov.

If domain walls are found, the news might come as a relief to physicists still waiting for WIMPs to show up. Earlier this month, for instance, a team working with a detector in Russia that has been running for more than 24 years announced that they have yet to see any sign of these dark matter candidates.

Douglas Finkbeiner of the Harvard-Smithsonian Center for Astrophysics, who was not involved in Pospelov's study, isn't yet convinced that dark matter walls exist. But he is glad that physicists are keeping an open mind about alternatives to WIMPs.

"We've looked for WIMP dark matter in so many ways," he says. "At some point you have to ask, are we totally on the wrong track?"

Journal reference: Physical Review Letters, DOI: 10.1103/PhysRevLett.110.021803

If you would like to reuse any content from New Scientist, either in print or online, please contact the syndication department first for permission. New Scientist does not own rights to photos, but there are a variety of licensing options available for use of articles and graphics we own the copyright to.

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One Connect launched in Bishan-Toa Payoh Constituency

SINGAPORE: The Bishan-Toa Payoh Group Representation Constituency is the latest to get a one-stop service for private estate residents to call.

Called One Connect, the residents can use the helpline if they are unsure which agency to contact when there are estate maintenance issues.

Defence Minister Ng Eng Hen launched the service on Saturday, along with fellow Members of Parliament for the constituency.

Managed by the People's Association, One Connect also aims to promote community bonding programmes by driving the formation of interest groups.

The service has already been introduced in other estates like Nee Soon, Ang Mo Kio, and Marine Parade.

The People's Association hopes to have One Connect rolled out island-wide by March 2013.

- CNA/fa

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Recalibrate your expectations of how good an in-ear headphone can sound

I've been listening to Jerry Harvey's custom-molded in-ear headphones for years. The very first one, the UE10, was a game changer; in 2006 it was the best sounding in-ear headphone I'd heard. Now with his new Freqphase JH13 and JH16 in-ears, Harvey's done it again. The performance gains in clarity, detail, resolution, and stereo imaging are huge -- the adrenaline-pumping sound of the music you love over a set of Harvey's headphones can't be matched by any other in-ear 'phones.

The Jerry Harvey JH13 Freqphase in-ear headphone.

(Credit:
Steve Guttenberg/CNET)

Years before he made headphones, Harvey mixed stage monitor sound for Kiss, Van Halen, David Lee Roth, The Cult, KD Lang, Linkin Park, and many others, and that background led to his inventing the in-ear stage monitor/headphone. He founded Ultimate Ears, but now runs Jerry Harvey Audio. The man's passion for great sound knows no bounds, and he still makes time to hit the road. Harvey was on the Van Halen tour from January through June of 2012. Perfecting in-ear headphone design balanced with working with live music keep Harvey in the game.

The new $1,099 "Freqphase" JH13 and $1,149 JH16 headphones use the same types of balanced armature drivers that were in the older JH Audio models, but everything else has been redesigned. There's a new crossover network for the separate bass, midrange, and treble drivers, and the silicone tubes that direct the sound out to your ears are tuned in a new way. My photo comparing the old and new JH13 shows how different the two headphones are.

The new JH13 nails the sound of drums' dynamic attack and punch like no other in-ear I've tested. I don't spend a lot of time listening to very loud music, but I will say the Freqphase headphones sound amazing when cranked way up. The sound never turns harsh or aggressive. Listening at saner levels, the resolution is still quite extraordinary. Classical music was well served by the new headphones' sound.

The new JH13 (left), compared with the original JH13 (right).

(Credit:
Steve Guttenberg/CNET)

I'm hearing finer details of the mixes of favorite old recordings that I've heard hundreds of times, which makes the recordings sound fresher and sometimes better than I thought they were. The Freqphase JH16's sound is similar, but it has more low bass punch and impact than the JH13. The original JH16's bass could sometimes be overwhelming and too thick for my taste, but the new '16's bass definition is excellent.

I did the bulk of my listening for these tests with the headphones plugged into my
iPod Classic, listening to Apple Lossless files. I also tried the Freqphase headphones with my ALO Rx-Mk3B portable headphone amp and AlgoRhythm Solo digital-to-analog converter. The gains in see-through transparency and sheer believability of the sound were impressive, but I didn't want to get side-tracked by what the separate amp and DAC brought to the sound, so I continued with just the
iPod Classic.

Sure, the better universal-fit in-ear headphones, such as the $400 Ultimate Ears UE 900, which also use separate bass, midrange and treble balanced armature drivers can sound great. It's the best-sounding universal fit I've heard for the money, but it pales in comparison to the JH13. The UE 900 doesn't block external noise as effectively; it has limited dynamics and bass definition/power, and reduced high-frequency extension and "air" so the Black Keys' raunchy blues are scaled back. The JH13 lets the 'Keys rock out more; the difference is far from subtle. I still love the UE 900 and recommend it in its price point, but if you can afford a great custom like the JH13 or JH16 you won't be sorry.

JH Audio offers only headphones that are custom-molded to your ear canals -- they don't make universal-fit headphones. To have a set of customs made you need to first visit an audiologist to have "impressions" of your ear canals made and sent to JH Audio's factory in Apopka, Florida. Custom headphones block external noise better than universal-fit models, so you can turn down the volume when listening in noisy environments. Customs are as effective as battery-powered noise-canceling headphones, and sound better.

The JH13's sound is a revelation, but how does it compare with full-size audiophile headphones, like the $1,000 Sennheiser HD 700? The JH13 was really good, but the HD 700 was more relaxed, richer, fuller, and even more open sounding. Still, I'd never use the HD 700 in the subway, plugged into my iPod.

My $2,000 UE Personal Reference Monitors (PRM) were "designed" by me, and built with the equalization curves I selected. My PRMs sound absolutely amazing, but the JH13s' clarity and soundstage accuracy trumps those of the PRMs. Harvey knows a lot more about what it takes to make great sound than I do!

The JH13 and JH16 Freqphase in-ear headphones advance the state of the art. They're highly recommended.

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