Google Wants to Own the Airwaves, Now

As if Google‘s launching a free Wi-Fi network in New York City earlier this month wasn’t curious enough, now the search giant is asking the Federal Communications Commission for a license to create an “experimental radio service.” What’s an experimental radio service, you ask? Well, Google won’t say exactly what its doing with the air above its Mountain View, California headquarters, but the details of the FCC application suggest it’s trying to build its own proprietary wireless network.

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Oh, so this must have something to do with Google Fiber and Google‘s becoming an Internet service provider, offering insanely fast Internet, right? Again, not exactly. “Google‘s small-scale wireless network would use frequencies that wouldn’t be compatible with nearly any of the consumer mobile devices that exist today, such as Apple’s iPad or iPhone or most devices powered by Google‘s Android operating system,” explain The Wall Street Journal‘s Amir Efrati and Anton Troianovski. “The network would only provide coverage for devices built to access certain frequencies, from 2524 to 2625 megahertz.” However, networks using those frequencies are under construction in Asia, just waiting for devices that support them. And last year, Google purchased Motorola Mobility, a mobile phone manufacturer that could ostensibly manufacture such devices. This is starting to sound sort of shady.

RELATED: You Were Right to Delete Your Google History

While it’s too soon to understand the extent of the company’s plans, it certainly looks like Google actually wants to own the airwaves now. Could we see a Google phone that works on a custom built Wi-Fi network, one that nobody else can use? It’s very possible. For now, Google‘s official answer to that line of questioning is that the company experiments all the time with all kinds of things. But according to Steven Crowley, a wireless engineer who first spotted the FCC application, ”The only reason to use these frequencies is if you have business designs on some mobile service.” 

Wireless News Headlines – Yahoo! News

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Defending champ Azarenka into final against Li

MELBOURNE, Australia (AP) — Victoria Azarenka overcame some anxiety, a sore left knee, and a slew of frustrating forehand errors before fending off American teenager Sloane Stephens to reach the Australian Open final against Li Na.

For the second time in two days, 19-year-old Stephens sat patiently in a courtside chair late in the second set while an experienced, older player took a medical timeout.

On Thursday, the top-seeded Azarenka asked for a medical timeout after wasting five match points with a sequence of forehand errors, but returned to quickly finish off a 6-1, 6-4 win on her sixth match point. The outcome was different on Wednesday, when Stephens rallied from a set and a break down to beat an injured Serena Williams in three sets.

After dropping serve in the ninth game of the second set, Azarenka went to the locker room for treatment — the tournament confirmed later it was for left knee and rib injuries — and then returned to break the 29th-seeded Stephens' serve to finish off the match.

"Well I almost did the choke of the year right now at 5-3 having so many chances I couldn't close it out," Azarenka said in an on-court TV interview. "I just felt a little bit overwhelmed. I realized I'm one step away from the final and nerves got into me for sure."

The crowd had tried to get Stephens back into the match in the second set. Fans yelled encouragement after almost every point and a few in the crowd heckled Azarenka by mocking the noise she makes when she hits the ball.

Azarenka started to lose her composure when she hit a forehand way beyond the baseline on her third match point, her hooting sound elevating to a louder, high-pitched shriek.

After Stephens saved the match points, the crowd gave her a huge round of applause and a few people jumped out of their seats. Azarenka got a tepid applause after clinching the match.

The 23-year-old Azarenka later said she'd had difficulty breathing.

"I couldn't breathe. I had chest pains," she said. "It was like I was getting a heart attack.

"After that it wasn't my best, but it's important to overcome this little bit of a struggle and win the match."

Stephens said the timing of the medical break didn't affect the match.

"It's happened before. Last match, match before, I've had people going for medical breaks, going to the bathroom," she said. "Didn't affect me. Just another something else that happens."

The temperature hit 97 degrees during the second women's semifinal, slightly hotter than it had been when Li Na beat No. 2-ranked Maria Sharapova 6-2, 6-2 to reach the Australian Open final for the second time in three years.

Sharapova was the heavy favorite after conceding only nine games in her first five matches, a record at the Australian Open.

But the semifinal started badly for the 25-year-old Russian, serving double-faults to lose the first two points and conceding a break in the first game.

Li was the first Chinese player to reach a Grand Slam final when she lost to Kim Clijsters at Melbourne Park in 2011. She had her breakthrough a few months later when she won the French Open, beating Sharapova in the semifinals along the way.

The crowd got behind Li early in the match, yelling "Come on, Li Na!" and others yelling "Jia You!" which is "Come on" in Chinese. After she broke Sharapova to take a 5-2 lead, the Chinese fans in the crowd shook Chinese flags and shouted again, "Jia You!"

"I don't know what happened (but) I always play well here, so thanks guys," said Li, who was playing her third Australian Open semifinal in four years. "I just came to the court feeling like, 'OK, just do it.'"

The heat and the speed of the court surface suited Li's game.

She broke Sharapova in the third game of the second set and served an ace to move within a point of a 4-2 lead, but lost the next three points to give her opponent a break opportunity.

Two big second serves took Sharapova by surprise, and Li fended off the challenge.

Li's coach, Carlos Rodriguez — who worked with retired seven-time major winner Justine Henin — pumped his fist over his heart after Li won the game.

Sharapova had control in her next service game, but Li scrambled from side to side and pushed the reigning French Open champion to go for the lines, getting a series of unforced errors and another break.

The sixth-seeded Li has been working since August with Rodriguez, and credits him with reviving her career with a renewed emphasis on condition.

"I'm happy. I know I have a tough coach, a tough physio," Li said, looking across to the stands and adding: "You don't need to push me anymore. I will push myself."

Sharapova, who lost the 2012 Australian final in straight sets to Azarenka, admitted it was hard to get into the match against Li.

"She was certainly much more aggressive than I was, dictating the play. I was always on the defense," said Sharapova, who could have gained the No. 1 ranking by reaching the Australian final. "When I had my opportunities and break points in games that went to deuce, I don't think any of them really went my way."

The composition of the women's semifinals was somewhat unexpected.

Stephens produced the upset of the tournament to advance to a Grand Slam semifinal for the first time with her 3-6, 7-5, 6-4 victory over 15-time major winner Serena Williams on Wednesday. Williams, who had been bidding for a third consecutive Grand Slam title, hurt her back in the second set and, after leading by a set and a break, ended a 20-match winning streak.

While there were surprises in the composition of the women's last four, the makeup of the men's semifinals was as expected.

Top-ranked Novak Djokovic will continue his bid for a third consecutive Australian title when he takes on No. 4 David Ferrer on Thursday. No. 2 Roger Federer and No. 3 Andy Murray will meet Friday.

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Well: Long Term Effects on Life Expectancy From Smoking

It is often said that smoking takes years off your life, and now a new study shows just how many: Longtime smokers can expect to lose about 10 years of life expectancy.

But amid those grim findings was some good news for former smokers. Those who quit before they turn 35 can gain most if not all of that decade back, and even those who wait until middle age to kick the habit can add about five years back to their life expectancies.

“There’s the old saw that everyone knows smoking is bad for you,” said Dr. Tim McAfee of the Centers for Disease Control and Prevention. “But this paints a much more dramatic picture of the horror of smoking. These are real people that are getting 10 years of life expectancy hacked off — and that’s just on average.”

The findings were part of research, published on Wednesday in The New England Journal of Medicine, that looked at government data on more than 200,000 Americans who were followed starting in 1997. Similar studies that were done in the 1980s and the decades prior had allowed scientists to predict the impact of smoking on mortality. But since then many population trends have changed, and it was unclear whether smokers today fared differently from smokers decades ago.

Since the 1960s, the prevalence of smoking over all has declined, falling from about 40 percent to 20 percent. Today more than half of people that ever smoked have quit, allowing researchers to compare the effects of stopping at various ages.

Modern cigarettes contain less tar and medical advances have cut the rates of death from vascular disease drastically. But have smokers benefited from these advances?

Women in the 1960s, ’70s and ’80s had lower rates of mortality from smoking than men. But it was largely unknown whether this was a biological difference or merely a matter of different habits: earlier generations of women smoked fewer cigarettes and tended to take up smoking at a later age than men.

Now that smoking habits among women today are similar to those of men, would mortality rates be the same as well?

“There was a big gap in our knowledge,” said Dr. McAfee, an author of the study and the director of the C.D.C.’s Office on Smoking and Public Health.

The new research showed that in fact women are no more protected from the consequences of smoking than men. The female smokers in the study represented the first generation of American women that generally began smoking early in life and continued the habit for decades, and the impact on life span was clear. The risk of death from smoking for these women was 50 percent higher than the risk reported for women in similar studies carried out in the 1980s.

“This sort of puts the nail in the coffin around the idea that women might somehow be different or that they suffer fewer effects of smoking,” Dr. McAfee said.

It also showed that differences between smokers and the population in general are becoming more and more stark. Over the last 20 years, advances in medicine and public health have improved life expectancy for the general public, but smokers have not benefited in the same way.

“If anything, this is accentuating the difference between being a smoker and a nonsmoker,” Dr. McAfee said.

The researchers had information about the participants’ smoking histories and other details about their health and backgrounds, including diet, alcohol consumption, education levels and weight and body fat. Using records from the National Death Index, they calculated their mortality rates over time.

People who had smoked fewer than 100 cigarettes in their lifetimes were not classified as smokers. Those who had smoked at least 100 cigarettes but had not had one within five years of the time the data was collected were classified as former smokers.

Not surprisingly, the study showed that the earlier a person quit smoking, the greater the impact. People who quit between 25 and 34 years of age gained about 10 years of life compared to those who continued to smoke. But there were benefits at many ages. People who quit between 35 and 44 gained about nine years, and those who stopped between 45 and 59 gained about four to six years of life expectancy.

From a public health perspective, those numbers are striking, particularly when juxtaposed with preventive measures like blood pressure screenings, colorectal screenings and mammography, the effects of which on life expectancy are more often viewed in terms of days or months, Dr. McAfee said.

“These things are very important, but the size of the benefit pales in comparison to what you can get from stopping smoking,” he said. “The notion that you could add 10 years to your life by something as straightforward as quitting smoking is just mind boggling.”

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Media Decoder Blog: A Resurgent Netflix Beats Projections, Even Its Own

9:12 p.m. | Updated For all those who have doubted its business acumen, Netflix had a resounding answer on Wednesday: 27.15 million.

That’s the number of American homes that were subscribers to the streaming service by the end of 2012, beating the company’s own projections for the fourth quarter after a couple of quarters of underwhelming results.

Netflix’s growth spurt in streaming — up by 2.05 million customers in the United States, from 25.1 million in the third quarter — was its biggest in nearly three years, and helped the company report net income of $7.9 million, surprising many analysts who had predicted a loss.

The results reflected just how far Netflix has come since the turbulence of mid-2011, when its botched execution of a new pricing plan for its services — streaming and DVDs by mail — resulted in an online flogging by angry customers. Investors battered its stock price, sending it from a high of around $300 in 2011 to as low as $53 last year.

“It’s risen from the ashes,” said Barton Crockett, a senior analyst at Lazard Capital Markets. “A lot of investors have been very skeptical that Netflix will work. With this earnings report, they’re making a strong argument that the business is real, that it will work.”

Investors, cheered by the results, sent Netflix shares soaring more than 35 percent in after-hours trading Wednesday. The stock had ended regular trading at $103.26.

Netflix’s fourth-quarter success was a convenient reminder to the entertainment and technology industries that consumers increasingly want on-demand access to television shows and movies. Streaming services by Amazon, Hulu and Redbox are all competing on the same playing field, but for now Netflix remains the biggest such service, and thus a pioneer for all the others.

“Our growth and our competitors’ growth shows just how large the opportunity is for Internet TV, where people get to control their viewing experience,” Netflix’s chief executive, Reed Hastings, said in a telephone interview Wednesday evening.

Questions persist, though, about whether Netflix will be able to attract enough subscribers to keep paying its ever-rising bills to content providers, which total billions of dollars in the years to come. The company said on Wednesday that it might take on more debt to finance more original programs, the first of which, the political thriller “House of Cards,” will have its premiere on the service on Feb. 1. Netflix committed about $100 million to make two seasons of “House of Cards,” one of five original programs scheduled to come out on the service this year.

“The virtuous cycle for us is to gain more subscribers, get more content, gain more subscribers, get more content,” Mr. Hastings said in an earnings conference call.

The company’s $7.9 million profit for the quarter represented 13 cents a share, surprising analysts who had expected a loss of 12 cents a share. The company said revenue of $945 million, up from $875 million in the quarter in 2011, was driven in part by holiday sales of new tablets and television sets.

Netflix added nearly two million new subscribers in other countries, though it continued to lose money overseas, as expected, and said it would slow its international expansion plans in the first part of this year.

The “flix” in Netflix, its largely forgotten DVD-by-mail business, fared a bit better than the company had projected, posting a loss of just 380,000 subscribers in the quarter, to 8.22 million. The losses have slowed for four consecutive quarters, indicating that the homes that still want DVDs really want DVDs.

On the streaming side, Netflix’s retention rate improved in the fourth quarter, suggesting growing customer satisfaction.

Asked whether the company’s reputation had fully recovered after its missteps in 2011, Mr. Hastings said, “We’re on probation at this point, but we’re not out of jail.”

He has emphasized subscriber happiness, even going so far as to say on Wednesday that “we really want to make it easy to quit” Netflix. If the exit door is well marked, he asserted, subscribers will be more likely to come back.

The hope is that original programs like “House of Cards” and “Arrested Development” will lure both old and new subscribers to the service. Those programs, plus the film output deal with the Walt Disney Company announced in December, affirm that Netflix cares more and more about being a gallery — with showy pieces that cannot be seen anywhere else — and less about being a library of every film and TV show ever made.

“They’re morphing into something that people understand,” said Mr. Crockett of Lazard Capital.

Mr. Hastings said this had been happening for years, but that it was becoming more apparent now to consumers and investors.

Mr. Hastings’s letter to investors brought up the elephant in the room, the activist investor Carl C. Icahn, who acquired nearly 10 percent of the company’s stock last October. Mr. Icahn, known for his campaigns for corporate sales and revampings, stated then that Netflix “may hold significant strategic value for a variety of significantly larger companies.”

Netflix subsequently put into place a shareholder rights plan, known as a poison pill, to protect itself against a forced sale by Mr. Icahn.

The company said on Wednesday, “We have no further news about his intentions, but have had constructive conversations with him about building a more valuable company.”

Factoring in the stock’s 30 percent rise since November and the after-hours action on Wednesday, Mr. Icahn’s stake has now more than doubled in value, to more than $700 million from roughly $320 million.

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Cameron Promises Britons a Vote on E.U. Membership

LONDON — Prime Minister David Cameron promised Britons a far-reaching referendum on membership in the European Union in a long-awaited speech on Wednesday whose implications have alarmed the Obama administration.

The projected vote will be held only if his Conservative Party wins the election scheduled for 2015, he told an audience in London, and the ballot will take place in or before 2018.

Mr. Cameron had initially planned to deliver the address in the Netherlands last Friday but postponed it because of the hostage crisis in Algeria.

The speech was a defining moment in Mr. Cameron’s political career, reflecting a belief that, by wresting some powers back from the E.U., he can win the support of a grudging British public which has long been ambivalent — or actively hostile — toward the idea of European integration.

“I never want us to haul up the drawbridge and retreat from the world,” he said. “I am not an isolationist.” But he said Britons had a particular view of Europe. “We can no more change this sensibility than drain the English Channel,” he said.

The projected referendum is also a gamble since, if Britons chose to leave the union — a course Mr. Cameron says he opposes — they would be casting aside an engagement which has been a fundamental part of government policy here for four decades. A British exit would also mean the departure from the bloc of a major economic and banking power, placing new obstacles between British businesses and their main trading partners across the English Channel.

Speaking in London early on Wednesday, Mr. Cameron declared: “It is time for the British people to have their say. It is time to settle this European question in British politics.”

“I say to the British people: this will be your decision. And when that choice comes, you will have an important choice to make about our country’s destiny.”

Mr. Cameron said public disillusionment with the European Union in Britain was at an “all-time high” in Britain, and “democratic consent” for membership was “wafer-thin.”.

He ruled out an immediate ballot, saying that the turmoil within the 17-nation zone which uses the euro single currency, of which Britain is not a member, meant that the broader European Union was heading for sweeping reforms which his government wanted to influence.

A referendum before those changes are made, he said, would present an “entirely false choice” with the euro zone in crisis and the shape of the European Union’s future unresolved.

In his speech, Mr. Cameron said he will seek a mandate at the 2015 election for a Conservative government to negotiate a new relationship with the European Union.

“And when we have negotiated that new settlement, we will give the British people a referendum with a very simple in-or-out choice: to stay in the E.U. on these new terms, or come out altogether. It will be an in-out referendum,” he said.

Mr. Cameron added that he will complete the negotiations and hold this referendum within the first half of his next term, if he wins one, suggesting that the vote would take place in 2017 or 2018.

Mr. Cameron had been under mounting pressure from his Conservative Party to make the announcement. Quite apart from an instinctive and historical aversion to closer European integration among many of them, Conservative lawmakers are also concerned about a potential electoral threat from insurgent euroskpeticsin the U.K. Independence Party. The United States has been unusually public in its insistence that Britain, a close ally, stay in the union. Last week, a White House spokesman quoted President Obama as telling Mr. Cameron by telephone that “the United States values a strong U.K. in a strong European Union, which makes critical contributions to peace, prosperity and security in Europe and around the world.”

On Wednesday, Mr. Cameron noted “a gap between the E.U. and its citizens which has grown dramatically in recent years and which represents a lack of democratic accountability and consent that is — yes — felt particularly acutely in Britain.”

“If we don’t address these challenges, the danger is that Europe will fail and the British people will drift toward the exit. I do not want that to happen. I want the European Union to be a success, and I want a relationship between Britain and the E.U. that keeps us in it.”

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FTC study taking aim at online marketing of booze and kids

LOS ANGELES (Reuters) – The Federal Trade Commission (FTC) plans this summer to recommend ways that the alcoholic beverage industry can better protect underage viewers from seeing its advertisements online.

Distillers, brewers and wineries pour millions of dollars into brand promotion on Twitter, Facebook and other social media, and industry critics contend they are not doing enough to prevent young consumers from receiving these messages.

“We’re doing a deep dive on how they’re using the Internet and social media,” said Janet Evans, a lawyer with the FTC, which is conducting a year-long study due to be released by early summer. “We’re focusing on underage exposure.”

She would not elaborate on any potential recommendations that might come out of the study, which began in April 2012.

The FTC is reviewing data from 14 big producers, Evans said, including Beam Inc, the maker of Jim Beam, Diageo Plc, home to Johnnie Walker, and Constellation Brands Inc, which makes Robert Mondavi and Ravenswood wines.

The FTC report “is something we take seriously and place at high priority,” said Karena Breslin, director for digital marketing at Constellation.

The FTC has made two requests for information since the study began, she said.

The regulatory agency has not said it intends to impose restrictions on liquor company social media advertising but it can make recommendations to the industry.

The FTC is empowered to file suit to ensure consumers are protected from deceptive marketing practices, Evans said, but she stressed that studies of this nature are meant to promote better self-regulation, not provide a basis for a case.

Executives say alcohol makers and distributors voluntarily adhere to the same industry-set standard for marketing to underage viewers on social media sites that the industry set for its ads on TV and other medium. That requires that at least 71.6 percent of an audience consists of adults 21 and older.

“No one in their right mind would want to advertise to people who can’t legally buy their product,” said Frank Coleman, senior vice president for Distilled Spirits Council of the United States (DISCUS), the trade group that sets the industry’s advertising codes.

In June 2011, DISCUS revised its code upwards to 71.6 percent from 70 percent, after the FTC recommended it review the standard to better reflect U.S. Census population data.

Industry critics, including David Jernigen, director of the Center on Alcohol Marketing and Youth at Johns Hopkins University, and Sarah Mart, research director of the advocacy group Alcohol Justice, contend the industry didn’t go far enough and should raise the standard further.

Jernigen says it needs to be at least 85 percent to effectively protect youth, so there would be no more than 15 percent exposure to the underage drinking population.

“The industry says its self-regulating but it’s ineffective and social media opens up a whole new set of problems because their ads are everywhere,” said Sarah Mart, research director for the San Rafael, Calif.-based group Alcohol Justice.

The industry group’s Coleman said the group now requires members to install age-checking tools via instant-messaging as a gateway to Twitter feeds and other branded Web platforms that ask the user for a birth date before admitting them.

In the first nine months of 2012, beer, wine and spirits manufacturers’ spent an estimated $ 35 million for paid Web display advertising, but industry executives estimate many millions more were spent on Web site creation, video production for platforms like Google’s YouTube and social media marketing efforts.

“We’ve significantly adjusted more money to digital for online video, Web sites, Facebook and Twitter content,” said Kevin George, global chief marketing officer for Jim Beam, which he says spends 30 percent of its media spend for online outlets, up from 10 percent in 2008.

Many companies are expanding their digital staff. Wine maker Constellation hired Breslin three years ago to initiate digital marketing and now has a team of five reporting to her.

Many alcoholic beverage companies flocked to Facebook because it requires users to post their birth dates when signing up. Last year Twitter partnered with Buddy Media to offer a more effective screening tool that sends a direct message to fans who click on a brand. The message sends the fan a link to a site that asks for date of birth, which has allowed Twitter to grab some more of the sector marketing. Salesforce.com bought Buddy Media last June, which is now folding the platform into its marketing cloud portfolio.

Health advocates and industry critics are crying foul. “Facebook and other interactive platforms are poorly monitored and not well age protected,” said Jernigen of Johns Hopkins University. “Anyone can say they’re 21 and click yes.”

(Reporting By Susan Zeidler; Editing by Ron Grover and Alden Bentley)

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Williams loses in quarters; Azarenka into semis

MELBOURNE, Australia (AP) — Serena Williams' dominating run at the majors ended in a painful loss to American teenager Sloane Stephens.

After the biggest victory of her life, the 19-year-old Stephens is headed to the semifinals of the Australian Open.

Williams hurt her back in the eighth game of the second set, slowing down her serve, restricting her movement and causing her obvious pain.

Stephens kept her composure, blocking out the injury issue on the opposite side of the net, and rallied for a 3-6, 7-5, 6-4 victory on Wednesday — by far the most significant in her seven Grand Slams.

The gravity of it didn't hit Stephens until she was warming down, and even then the victory had an unreal feeling.

"I was stretching, and I was like, 'I'm in the semis of a Grand Slam.' I was like, 'Whoa. It wasn't as hard as I thought.' But it's pretty cool," she said. "To be in the semis of a Grand Slam is definitely I say a good accomplishment. A lot of hard work."

It was Williams' first loss since Aug. 17, ending a run of 20 consecutive wins.

The 15-time major winner hadn't lost a match at a Grand Slam tournament since the French Open, where her first-round exit sparked her resurgence in the second half of 2012 that included titles at Wimbledon, the London Olympics, the U.S. Open and the WTA Championship.

After winning her first Grand Slam quarterfinal, Stephens next plays defending champion Victoria Azarenka.

In the men's draw, U.S. Open champion Andy Murray moved into the semifinals with a 6-4, 6-1, 6-2 win over unseeded Jeremy Chardy of France.

The No. 29-seeded Stephens had been given barely a chance of beating Williams, who lost only four matches in 2012 and was in contention to regain the No. 1 ranking at the age of 31.

Williams' latest winning streak included a straight-sets win over Stephens at the Brisbane International earlier this month.

And Stephens wasn't even sure that she could beat Williams, until she woke up Wednesday.

"When I got up, I was like, 'Look, Dude, like, you can do this.' Like, 'Go out and play and do your best," she said.

It wasn't until after losing the first set and being broken in the first game of the second that she really convinced herself she could.

"I was like, 'Hmm, this is not the way you want it to happen. But you just fight and just get every ball back, run every ball down, and just get a lot of balls in play, I think you'll be OK.'

"From then on I got aggressive, started coming to the net more, and just got a lot more comfortable."

She started hitting winners, cutting down on the errors, and pushing the injured Williams around the court.

Williams walked around the net to congratulate Stephens, who then clapped her hand on her racket and waved to the crowd, a look of disbelief on her face.

She then went to her tennis bag, pulled out her phone and started checking for any text messages from her mother.

"I was hoping she had texted me right away. I thought maybe she was texting me during the match," Stephens said. "I'm sure my grandparents are like freaking out."

Stephens has said she had a photo of Williams up in her room when she was a child, and had long admired the Williams sisters.

"This is so crazy. Oh my goodness," Stephens said, wiping away tears in her post-match TV interview. "I think I'll put a poster of myself (up) now."

For her part, Williams said the bad back was just another problem to contend with at a Grand Slam event that had been "absolutely" her worst for injuries. It started when she injured her ankle in the first round.

"I'm almost relieved that it's over because there's only so much I felt I could do," she said. "It's been a little difficult. I've been thrown a lot of (curve) balls these two weeks."

Williams was up a set and a break before Stephens settled in. In the eighth game of the second set, Williams was chasing a drop shot to the net when she appeared to hurt her back. She needed a medical timeout after the set, and then slowly started to regain the speed in her serve.

She said her back "just locked up" on her.

"I couldn't really rotate after that," she said. "It was a little painful, but it's OK."

There were times when she barely concealed the pain, and had to bend over or stretch out her back. Yet the thought of retiring from the match only crossed her mind "for a nanosecond."

It didn't mean she wasn't frustrated. Williams smashed her racket into the court in the third set, breaking the frame and then flinging it toward the chairs on the side of the court. She looked to the sky occasionally and yelled at herself.

The racket abuse cost her $1,500 in fines.

Azarenka, with her most famous fan sitting in the crowd wearing a shirt reminding her to keep calm, overcame some early jitters to beat Svetlana Kuznetsova 7-5, 6-1 in the earlier quarterfinal at Rod Laver Arena.

After dropping serve in a long fourth game that went to deuce 10 times, Azarenka recovered to dominate the rest of the match against Kuznetsova, a two-time major winner who was floating dangerously in the draw with a No. 75 ranking as she recovers from a knee injury.

Azarenka's American rapper friend, Redfoo, returned from a concert in Malaysia to attend Wednesday's quarterfinal.

Wearing a red sleeveless T-shirt that read "Keep Calm and Bring Out the Bottles," the name of his next single, Redfoo stood, clapped and yelled "Come on, Vika!" during the tight first set.

Asked if it helped to have her No. 1 fan wearing a keep calm logo, Azarenka said "I was looking more at the part that says 'Bring out the bottles.'"

Of her game, she added, "I'm just glad I could produce my good tennis when it was needed."

Williams' loss was a boost for Azarenka, who lost all five head-to-heads against the American in 2012 and is 1-11 in their career meetings.

In the men's quarterfinals, 17-time major winner Roger Federer was playing No. 7 Jo-Wilfried Tsonga in a night match for a spot in the semifinals against Murray.

The 25-year-old Murray had his service broken for only the second time while serving for the match. But he broke back immediately to clinch the quarterfinal victory.

"I'll watch a little bit but I won't watch the whole match," Murray said of the night quarterfinal, adding that he hoped "Roger and Jo play 4 to 5 hours if possible!"

Defending champion Novak Djokovic plays No. 4-seeded David Ferrer in the other semifinal.

On the other half of the women's draw, Maria Sharapova has conceded only nine games in five matches — a record in Australia — en route to a semifinal against 2011 French Open champion Li Na.

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Well: Is There an Ideal Running Form?

In recent years, many barefoot running enthusiasts have been saying that to reduce impact forces and injury risk, runners should land near the balls of their feet, not on their heels, a running style that has been thought to mimic that of our barefoot forebears and therefore represent the most natural way to run. But a new study of barefoot tribespeople in Kenya upends those ideas and, together with several other new running-related experiments, raises tantalizing questions about just how humans really are meant to move.

For the study, published this month in the journal PLoS One, a group of evolutionary anthropologists turned to the Daasanach, a pastoral tribe living in a remote section of northern Kenya. Unlike some Kenyan tribes, the Daasanach have no tradition of competitive distance running, although they are physically active. They also have no tradition of wearing shoes.

Humans have run barefoot, of course, for millennia, since footwear is quite a recent invention, in evolutionary terms. And modern running shoes, which typically feature well-cushioned heels that are higher than the front of the shoe, are newer still, having been introduced widely in the 1970s.

The thinking behind these shoes’ design was, in part, that they should reduce injuries. When someone runs in a shoe with a built-up heel, he or she generally hits the ground first with the heel. With so much padding beneath that portion of the foot, the thinking went, pounding would be reduced and, voila, runners wouldn’t get hurt.

But, as many researchers and runners have noted, running-related injuries have remained discouragingly common, with more than half of all runners typically being felled each year.

So, some runners and scientists began to speculate a few years ago that maybe modern running shoes are themselves the problem.

Their theory was buttressed by a influential study published in 2010 in Nature, in which Harvard scientists examined the running style of some lifelong barefoot runners who also happened to be from Kenya. Those runners were part of the Kalenjin tribe, who have a long and storied history of elite distance running. Some of the fastest marathoners in the world have been Kalenjin, and many of them grew up running without shoes.

Interestingly, when the Harvard scientists had the Kalenjin runners stride over a pressure-sensing pad, they found that, as a group, they almost all struck the ground near the front of their foot. Some were so-called midfoot strikers, meaning that their toes and heels struck the ground almost simultaneously, but many were forefoot strikers, meaning that they landed near the ball of their foot.

Almost none landed first on their heels.

What the finding seemed to imply was that runners who hadn’t grown up wearing shoes deployed a noticeably different running style than people who had always worn shoes.

And from that idea, it was easy to conjecture that this style must be better for you than heel-striking, since presumably it was more natural, echoing the style that early, shoeless cavemen would have used.

But the new study finds otherwise. When the researchers had the 38 Daasanach tribespeople run unshod along a track fitted, as in the Harvard study, with a pressure plate, they found that these traditionally barefoot adults almost all landed first with their heels, especially when they were asked to run at a comfortable, distance-running pace. For the group, that pace averaged about 8 minutes per mile, and 72 percent of the volunteers struck with their heels while achieving it. Another 24 percent struck with the midfoot. Only 4 percent were forefoot strikers.

When the Daasanach volunteers were asked to sprint along the track at a much faster speed, however, more of them landed near their toes with each stride, a change in form that is very common during sprints, even in people who wear running shoes. But even then, 43 percent still struck with their heels.

This finding adds to a growing lack of certainty about what makes for ideal running form. The forefoot- and midfoot-striking Kalenjin were enviably fast; during the Harvard experiment, their average pace was less than 5 minutes per mile.

But their example hasn’t been shown to translate to other runners. In a 2012 study of more than 2,000 racers at the Milwaukee Lakefront Marathon, 94 percent struck the ground with their heels, and that included many of the frontrunners.

Nor is it clear that changing running form reduces injuries. In a study published in October scientists asked heel-striking recreational runners to temporarily switch to forefoot striking, they found that greater forces began moving through the runners’ lower backs; the pounding had migrated from the runners’ legs to their lumbar spines, and the volunteers reported that this new running form was quite uncomfortable.

But the most provocative and wide-ranging implication of the new Kenyan study is that we don’t know what is natural for human runners. If, said Kevin G. Hatala, a graduate student in evolutionary anthropology at George Washington University who led the new study, ancient humans “regularly ran fast for sustained periods of time,” like Kalenjin runners do today, then they were likely forefoot or midfoot strikers.

But if their hunts and other activities were conducted at a more sedate pace, closer to that of the Daasanach, then our ancestors were quite likely heel strikers and, if that was the case, wearing shoes and striking with your heel doesn’t necessarily represent a warped running form.

At the moment, though, such speculation is just that, Mr. Hatala said. He and his colleagues plan to collaborate with the Harvard scientists in hopes of better understanding why the various Kenyan barefoot runners move so differently and what, if anything, their contrasting styles mean for the rest of us.

“Mostly what we’ve learned” with the new study, he said, “is how much still needs to be learned.”

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DealBook: Allergan to Buy MAP Pharmaceuticals for $958 Million

Allergan has agreed to pay nearly $1 billion to acquire MAP Pharmaceuticals and gain full control of its experimental treatment for migraine headaches, the two companies announced Tuesday night.

The purchase price of $25 a share in cash is a 60 percent premium over MAP’s closing price on Tuesday of $15.58 a share. The deal, valued at $958 million in total, suggests that Allergan has considerable faith that MAP’s new migraine treatment will win regulatory approval from the Food and Drug Administration by the agency’s deadline of April 15.

The two companies said the deal had been unanimously approved by the boards of both companies and was expected to close in the second quarter.

Allergan already had the rights to help market the migraine drug, known as Levadex, in the United States and Canada, but after an acquisition it would have control of all the profits and costs globally.

Allergan is most known for Botox, a form of the botulinum toxin, which is used for cosmetic purposes as well as medical ones, including the treatment of chronic migraines with the goal of reducing the frequency of headaches. By contrast, Levadex is meant to treat migraines after they occur, making it complementary to Botox, Allergan said.

Levadex is actually a new form of an old drug, known as dihydroergotamine, or DHE, which has been used to treat severe migraine attacks for decades. DHE is typically given by intravenous infusion, requiring patients to get to a hospital at a time when many would rather remain in a dark quiet room.

Levadex, by contrast, is breathed into the lungs using an inhaler similar to one used for asthma, allowing people to use it at home.

The F.D.A. declined to approve Levadex last March, though MAP said the rejection was related to manufacturing and questions about use of the inhaler, not the safety and efficacy of the drug. It resubmitted its application, with additional data and answers to questions from the F.D.A., in October.

Levadex would be the first approved product for MAP, which is based in Mountain View, Calif.

Allergan said that if Levadex is approved by April, the transaction would dilute earnings by about 7 cents a share in 2013 and add to earnings in the second half of 2014.

Allergan was advised by Goldman Sachs and the law firm Gibson, Dunn & Crutcher. MAP was advised by Centerview Partners and the law firm Latham & Watkins.

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British Woman Sentenced to Death in Bali Drug Case

BALI, Indonesia — A British woman was sentenced to death Tuesday by an Indonesian court after she was caught smuggling $2.5 million worth of cocaine onto the island of Bali.

The woman, Lindsay June Sandiford, 56, had claimed that she was forced to take the drugs into the country by a gang that had threatened to hurt one of her children. Her death sentence came even though prosecutors had only recommended a 15-year sentence.

Investigators said that customs officials found that she brought in 8.4 pounds of cocaine to Bali’s airport, which was hidden in the lining of her travel bag.

Indonesia is known for its tough treatment of people who commit drug offenses and other crimes, having put five foreigners to death in drug cases since 1998, and 40 foreigners are currently on death row for drug and other offenses.

Ms. Sandiford’s alleged accomplice, Anthony Pounder, also of Britain, is expected to be sentenced Wednesday.

In handing down its verdict, a judicial panel at the Denpasar District Court had found that Ms. Sandiford, by ferrying in the drugs, had damaged the image of Bali as a tourism destination and weakened the government’s drug prevention program. “We found no reason to lighten her sentence,” Amser Simanjuntak, who headed the judicial panel, said, according to The Associated Press.

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