Wall Street Sheds Morning Gains

After beginning the day with a partial rebound from Monday’s steep drop, stocks on Wall Street gave up their gains Tuesday in the course of Congressional testimony by Ben S. Bernanke, the Federal Reserve chairman.

In late morning trading, the Standard & Poor’s 500-stock index was essentially flat, while the Dow Jones industrial average was up 0.4 percent. The Nasdaq composite index was down 0.1 percent.

In his prepared testimony before the Senate Banking Committee, Mr. Bernanke defended the Fed’s bond-buying program and said the economy was growing at a “moderate if somewhat uneven pace.” Senators were questioning him on the prospects for a global currency war and the potential economic effects of the latest budget impasse in Congress.

The major indexes fell more than 1 percent on Monday, with the S.&P. 500 recording its biggest daily drop since November. The falloff came as investors fretted that if Italy does not undertake reforms, the euro zone could once again be destabilized. The Euro Stoxx 50 index was off more than 3 percent in late trading Tuesday.

Groups in Italy opposed to economic reforms posted a strong showing in the recent election, resulting in a political deadlock with a comedian’s protest party leading the poll and no group securing a clear majority in Parliament.

“We’ve gone to an environment of political stability to instability, and until we get some type of clarity over who is in charge, which could take days, the market will have renewed concerns,” said Art Hogan, managing director of Lazard Capital Markets in New York.

Still, market participants speculated that a coalition government would eventually emerge in Italy and ease worries about a new euro zone crisis.

The early market gains suggested the recent trend of investors buying on dips would continue. Last week, concerns that the Federal Reserve might roll back its stimulus efforts earlier than expected prompted a sharp two-day decline, though equities recovered most of the lost ground by the end of the week.

“Investors are taking advantage of the drop, and once some kind of coalition government is formed, most of our concerns will be put to rest,” Mr. Hogan said.

Home Depot reported adjusted earnings and sales that beat expectations, sending shares up more than 5 percent.

Macy’s rose 2.6 percent after stating it expected full-year earnings to be above analysts’ forecasts because of strong sales in the holiday period.

For the benchmark S.&P. 500, 1,500 points will be watched as a key benchmark after the index closed below it on Monday for the first time since Feb. 4, with selling accelerating after falling below it. An inability to break back above it could portend further losses.

Financial shares may be among the most volatile, as that sector is closely tied to the pace of global economic growth. Morgan Stanley was one of the top percentage losers on the S.&P. on Monday, dropping more than 6 percent on concerns about the company’s exposure to European debt. It initially rose 0.8 percent on Tuesday, but was down 0.5 percent by late morning.

This article has been revised to reflect the following correction:

Correction: February 26, 2013

Because of an editing error, an earlier version of this article misidentified the Senate panel before which Ben S. Bernanke, the Federal Reserve chairman, was testifying Tuesday. It was the Banking Committee, not the Finance Committee.

Read More..

Books: Gauging Faces and Bodies in the Botox Age

You never know what a little vanity will do for a person’s health. Some people bloom in their quest for physical improvement, others wither, and a few are completely destroyed. Despite centuries’ worth of efforts to penetrate the complicated thickets where health and beauty intertwine, there is always more to explore, as two new books make clear.

Dr. Eric Finzi, a dermatologist in the Washington area, has produced what may be the first authorized biography of botulinum toxin, the fearsome poison that, bottled into mild-mannered Botox, enhances foreheads everywhere. This little molecule does its good work by paralyzing muscles: In the forehead it inactivates the frown-producing corrugators, while used elsewhere on the head and body it can alleviate migraine headaches, stop problem sweating and ease the spasticity associated with a range of neurological diseases.

But even those who know all about the drug’s physical effects will be intrigued by Dr. Finzi’s narrative, because it turns out that cosmetic Botox may not be all about vanity after all. Research studies, including some by Dr. Finzi, have found that the substance appears to alleviate depression more safely and perhaps more effectively than the usual treatments.

That result at first seems trivial and obvious: If you stop frowning at people, they’ll like you more  and treat you better, and you won’t feel so blue. But the process turns out to be considerably more sophisticated and complicated, because it appears to apply even to people without visible frown lines.

Dr. Finzi calls it “noncosmetic cosmetic surgery” and traces the postulated mechanism to some of the lesser-known work of William James and Charles Darwin. Both thinkers argued that facial expressions are not just the outward manifestations of emotion, but vital links in the unconscious neurological processes that create emotion. In other words, if you cannot smile, you will never be as happy as if you could, and if you cannot frown, you will be unable to experience the full intensity of the negative emotions manifested by frowning, depression included.

This “facial feedback hypothesis” has found some modern confirmation in a study showing that injections of Botox into the forehead seem to inhibit activation of the amygdala, the brain structure thought to regulate all gut-wrenching emotion.

Dr. Finzi expands his narrative with a discussion of the subtleties of common facial expressions, including homage to interested parties like Norman Cousins and his idea that laughter could cure disease.

But the book’s major focus is the frown: Dr. Finzi offers anecdotes suggesting that taming overactive corrugators may save marriages and boost careers, and then, spinning some of the still largely debatable theories linking depression and anger with chronic disease, he postulates that Botox treatments may someday prove to help forestall heart disease and cancer.

That’s quite a set of achievements for one bad little molecule, gram for gram the most potent toxin we know. Dr. Finzi is no stylist, but the momentum of his argument keeps the reader with him for the duration (and undoubtedly quite a few overactive corrugators will be soothed into submission as a result).

The complexities of the face almost pale in comparison with those of the torso, as Abigail C. Saguy makes clear in “What’s Wrong With Fat?” “Once you put down this book you will never hear the word ‘obesity’ the same way again,” she promises, and she is absolutely correct.

Dr. Saguy, a sociologist at U.C.L.A., methodically teases out all the overtones of the loaded words we use to describe big bodies. These bodies are, after all, neither good nor bad, just big.

But “fat” often implies the coexistence of sloth, gluttony and self-indulgence. “Obesity” equals disease to medical professionals, while in the world of public health it is a raging epidemic with substantial global mortality. Those immersed in the conventional ideals of beauty see being overweight as an aesthetic disaster, but others find it sexually irresistible, and to activists “fat” has become a rallying cry, with weight-based discrimination a violation of social justice as deplorable as that stemming from race or gender.

In fact, the concept of bigness has become so laden with overtones good and bad — guilt, blame, fear, anger and desire, among others — that finding a value-free way to describe men and women who are larger than average has become almost impossible. “Heavy,” “plus-size,” “corpulent” and “fleshy” all carry weighty implications in one sphere or another.

Dr. Saguy analyzes it all, and asks why. She winds up paying particular attention to the debate in the medical world over the actual health consequences of being fat: Studies keep confounding the reigning supposition that thin is best with evidence that modestly overweight may be even better. Meanwhile, those who are larger than average are routinely blamed for their size, a phenomenon augmented by deplorably simplistic media coverage (unlike anorexia, interestingly enough, which is remarkably free of the same connotations of personal fault).

Much of Dr. Saguy’s text is academic and requires some determination to penetrate, but she also provides immensely readable nuggets, notably a brief discussion of her experiences attending an annual convention of the National Association to Advance Fat Acceptance, where, seven months pregnant, she underwent a funhouse-mirror body-image transformation worthy of Alice in Wonderland. Like Dr. Finzi’s narrative deficiencies, hers fade into unimportance in the face of fascinating and illuminating material.

Read More..

Books: Gauging Faces and Bodies in the Botox Age

You never know what a little vanity will do for a person’s health. Some people bloom in their quest for physical improvement, others wither, and a few are completely destroyed. Despite centuries’ worth of efforts to penetrate the complicated thickets where health and beauty intertwine, there is always more to explore, as two new books make clear.

Dr. Eric Finzi, a dermatologist in the Washington area, has produced what may be the first authorized biography of botulinum toxin, the fearsome poison that, bottled into mild-mannered Botox, enhances foreheads everywhere. This little molecule does its good work by paralyzing muscles: In the forehead it inactivates the frown-producing corrugators, while used elsewhere on the head and body it can alleviate migraine headaches, stop problem sweating and ease the spasticity associated with a range of neurological diseases.

But even those who know all about the drug’s physical effects will be intrigued by Dr. Finzi’s narrative, because it turns out that cosmetic Botox may not be all about vanity after all. Research studies, including some by Dr. Finzi, have found that the substance appears to alleviate depression more safely and perhaps more effectively than the usual treatments.

That result at first seems trivial and obvious: If you stop frowning at people, they’ll like you more  and treat you better, and you won’t feel so blue. But the process turns out to be considerably more sophisticated and complicated, because it appears to apply even to people without visible frown lines.

Dr. Finzi calls it “noncosmetic cosmetic surgery” and traces the postulated mechanism to some of the lesser-known work of William James and Charles Darwin. Both thinkers argued that facial expressions are not just the outward manifestations of emotion, but vital links in the unconscious neurological processes that create emotion. In other words, if you cannot smile, you will never be as happy as if you could, and if you cannot frown, you will be unable to experience the full intensity of the negative emotions manifested by frowning, depression included.

This “facial feedback hypothesis” has found some modern confirmation in a study showing that injections of Botox into the forehead seem to inhibit activation of the amygdala, the brain structure thought to regulate all gut-wrenching emotion.

Dr. Finzi expands his narrative with a discussion of the subtleties of common facial expressions, including homage to interested parties like Norman Cousins and his idea that laughter could cure disease.

But the book’s major focus is the frown: Dr. Finzi offers anecdotes suggesting that taming overactive corrugators may save marriages and boost careers, and then, spinning some of the still largely debatable theories linking depression and anger with chronic disease, he postulates that Botox treatments may someday prove to help forestall heart disease and cancer.

That’s quite a set of achievements for one bad little molecule, gram for gram the most potent toxin we know. Dr. Finzi is no stylist, but the momentum of his argument keeps the reader with him for the duration (and undoubtedly quite a few overactive corrugators will be soothed into submission as a result).

The complexities of the face almost pale in comparison with those of the torso, as Abigail C. Saguy makes clear in “What’s Wrong With Fat?” “Once you put down this book you will never hear the word ‘obesity’ the same way again,” she promises, and she is absolutely correct.

Dr. Saguy, a sociologist at U.C.L.A., methodically teases out all the overtones of the loaded words we use to describe big bodies. These bodies are, after all, neither good nor bad, just big.

But “fat” often implies the coexistence of sloth, gluttony and self-indulgence. “Obesity” equals disease to medical professionals, while in the world of public health it is a raging epidemic with substantial global mortality. Those immersed in the conventional ideals of beauty see being overweight as an aesthetic disaster, but others find it sexually irresistible, and to activists “fat” has become a rallying cry, with weight-based discrimination a violation of social justice as deplorable as that stemming from race or gender.

In fact, the concept of bigness has become so laden with overtones good and bad — guilt, blame, fear, anger and desire, among others — that finding a value-free way to describe men and women who are larger than average has become almost impossible. “Heavy,” “plus-size,” “corpulent” and “fleshy” all carry weighty implications in one sphere or another.

Dr. Saguy analyzes it all, and asks why. She winds up paying particular attention to the debate in the medical world over the actual health consequences of being fat: Studies keep confounding the reigning supposition that thin is best with evidence that modestly overweight may be even better. Meanwhile, those who are larger than average are routinely blamed for their size, a phenomenon augmented by deplorably simplistic media coverage (unlike anorexia, interestingly enough, which is remarkably free of the same connotations of personal fault).

Much of Dr. Saguy’s text is academic and requires some determination to penetrate, but she also provides immensely readable nuggets, notably a brief discussion of her experiences attending an annual convention of the National Association to Advance Fat Acceptance, where, seven months pregnant, she underwent a funhouse-mirror body-image transformation worthy of Alice in Wonderland. Like Dr. Finzi’s narrative deficiencies, hers fade into unimportance in the face of fascinating and illuminating material.

Read More..

Gadgetwise Blog: Q&A: Staying Safe From Java Threats

I hear lots of scary stuff about hackers getting into computers thru Java. What do I need to do to make my Mac and PC safe? Any worries about tablets?

Java is a computing platform with its own programming language that is used in many games, business applications and other utilities. It runs on more than 850 million computers worldwide and is used often by Web browsers. Recent attacks on Apple and Facebook used a flaw in the Java Web browser plug-in to infect computers with malicious software when visiting certain sites, and the Department of Homeland Security even issued a warning about Java back in January.

Computers running Windows, Mac OS X and Linux are most at risk. Tablets running systems like Android and iOS are not generally affected; mobile browsers have a setting for the JavaScript programming language, but JavaScript is basically unrelated to Java and its not subject to the current malware issues.

Disabling Java in your Web browser should protect your computer from the recent types of security threats, although you may not be able to play certain games or use Java-dependent applications. Oracle, which develops Java, has instructions for disabling Java in several browsers on Windows, Mac and Linux systems. Independent security sites, like Krebs on Security and Sophos, have additional information.

Apple released its own Mac OS X update to deal with the Java problem on Feb. 19, and the Macworld site has an article on going beyond the browser plug-in and removing Java altogether. Oracle has instructions for uninstalling Java completely on a Windows system, as well as on a Mac.

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India Ink: Image of the Day: Feb. 26

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DealBook: Barnes & Noble Chairman Leonard Riggio to Bid for Bookstore's Retail Business

The chairman of Barnes & Noble plans to bid for the retail business of the bookstore chain he started 40 years ago, as the company struggles with a changing competitive landscape.

On Monday, Leonard Riggio told the company’s board that he would make an offer for Barnes & Noble Booksellers, barnesandnoble.com and other retail assets. The proposal would not include the e-book division, Nook Media.

Like many retailers, the company is confronted by waning profit in its core business, as online retailers and other competitors gain market share. Barnes & Noble recently warned that earnings would be weak in the latest quarter, with losses rising in its Nook Media division.

Conceived as a serious competitor to Amazon.com’s Kindle, the Nook has instead become an also-ran in the race for digital book supremacy. The Kindle remains the top-selling dedicated e-reader, while the iPad consistently leads the competition among tablets. Amazon’s Kindle app has also maintained a huge lead in popularity, limiting Barnes & Noble’s reach across the broader digital bookselling landscape.

It is the boldest move yet by Mr. Riggio, the company’s largest shareholder who owns nearly 30 percent of Barnes & Noble, to try and save the company.

After building a small chain of college bookstores, Mr. Riggio in the 1970s bought the Barnes & Noble name and the flagship location in Manhattan, which had run into trouble. Over the next several decades, he built the company into the nation’s biggest brick-and-mortar bookseller.

In recent years, Mr. Riggio has fended off challenges from the likes of the billionaire Ronald W. Burkle. As part of that effort, Mr. Riggio argued, in large part, that the company was well-positioned in the future by betting on the Nook and digital books.

Others believed in the promise of the e-reader as well.

Microsoft paid $300 million in April for a 17.6 percent stake in the Nook business, valuing it then at $1.7 billion. Microsoft also secured Barnes & Noble’s commitment to produce an e-reader app for its Windows 8 operating system. And in December, the British publisher Pearson agreed to buy a 5 percent stake for $89.5 million.

Mr. Riggio, plans to negotiate the price with the board, according to a regulatory filing. The proposal is expected to be mainly in cash. The retailer’s board had already been weighing whether to spin off its Nook unit.

Barnes & Noble said in a statement that it had formed a special board committee of three directors – David G. Golden, David A. Wilson and Patricia L. Higgins – to consider Mr. Riggio’s proposal. The committee will be advised by Evercore Partners and the law firm Paul, Weiss, Rifkind, Wharton & Garrison.

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This post has been revised to reflect the following correction:

Correction: February 25, 2013

An earlier version of this article referred imprecisely to the role of its largest shareholder, Leonard Riggio, in the company’s history. While Mr. Riggio founded the modern company that acquired the name in the 1970s, William Barnes and G. Clifford Noble opened the original Barnes & Noble bookstore, in 1917.

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Mediterranean Diet Can Cut Heart Disease, Study Finds

About 30 percent of heart attacks, strokes and deaths from heart disease can be prevented in people at high risk if they switch to a Mediterranean diet rich in olive oil, nuts, beans, fish, fruits and vegetables, and even drink wine with meals, a large and rigorous new study found.

The findings, published on the New England Journal of Medicine’s Web site on Monday, were based on the first major clinical trial to measure the diet’s effect on heart risks. The magnitude of the diet’s benefits startled experts. The study ended early, after almost five years, because the results were so clear it was considered unethical to continue.

The diet helped those following it even though they did not lose weight and most of them were already taking statins, or blood pressure or diabetes drugs to lower their heart disease risk.

“Really impressive,” said Rachel Johnson, a professor of nutrition at the University of Vermont and a spokeswoman for the American Heart Association. “And the really important thing — the coolest thing — is that they used very meaningful end points. They did not look at risk factors like cholesterol of hypertension or weight. They looked at heart attacks and strokes and death. At the end of the day, that is what really matters.”

Until now, evidence that the Mediterranean diet reduced the risk of heart disease was weak, based mostly on studies showing that people from Mediterranean countries seemed to have lower rates of heart disease — a pattern that could have been attributed to factors other than diet.

And some experts had been skeptical that the effect of diet could be detected, if it existed at all, because so many people are already taking powerful drugs to reduce heart disease risk, while other experts hesitated to recommend the diet to people who already had weight problems, since oils and nuts have a lot of calories.

Heart disease experts said the study was a triumph because it showed that a diet is powerful in reducing heart disease risk, and it did so using the most rigorous methods. Scientists randomly assigned 7,447 people in Spain who were overweight, were smokers, had diabetes or other risk factors for heart disease to follow the Mediterranean diet or a low-fat one.

Low-fat diets have not been shown in any rigorous way to be helpful, and they are also very hard for patients to maintain — a reality born out in the new study, said Dr. Steven E. Nissen, chairman of the department of cardiovascular medicine at the Cleveland Clinic Foundation.

“Now along comes this group and does a gigantic study in Spain that says you can eat a nicely balanced diet with fruits and vegetables and olive oil and lower heart disease by 30 percent,” he said. “And you can actually enjoy life.”

The study, by Dr. Ramon Estruch, a professor of medicine at the University of Barcelona, and his colleagues, was long in the planning. The investigators traveled the world, seeking advice on how best to answer the question of whether a diet alone could make a big difference in heart disease risk. They visited the Harvard School of Public Health several times to consult Dr. Frank M. Sacks, a professor of cardiovascular disease prevention there.

In the end, they decided to randomly assign subjects at high risk of heart disease to three groups. One would be given a low-fat diet and counseled on how to follow it. The other two groups would be counseled to follow a Mediterranean diet. At first the Mediterranean dieters got more intense support. They met regularly with dietitians while the low-fat group just got an initial visit to train them in how to adhere to the diet followed by a leaflet each year on the diet. Then the researchers decided to add more intensive counseling for them, too, but they still had difficulty staying with the diet.

One group assigned to a Mediterranean diet was given extra virgin olive oil each week and was instructed to use at least 4 tablespoons a day. The other group got a combination of walnuts, almonds and hazelnuts and was instructed to eat about an ounce of them each day. An ounce of walnuts, for example, is about a quarter cup — a generous handful. The mainstays of the diet consisted of at least 3 servings a day of fruits and at least two servings of vegetables. Participants were to eat fish at least three times a week and legumes, which include beans, peas and lentils, at least three times a week. They were to eat white meat instead of red, and, for those accustomed to drinking, to have at least 7 glasses of wine a week with meals.

They were encouraged to avoid commercially made cookies, cakes and pastries and to limit their consumption of dairy products and processed meats.

Read More..

Mediterranean Diet Can Cut Heart Disease, Study Finds

About 30 percent of heart attacks, strokes and deaths from heart disease can be prevented in people at high risk if they switch to a Mediterranean diet rich in olive oil, nuts, beans, fish, fruits and vegetables, and even drink wine with meals, a large and rigorous new study found.

The findings, published on the New England Journal of Medicine’s Web site on Monday, were based on the first major clinical trial to measure the diet’s effect on heart risks. The magnitude of the diet’s benefits startled experts. The study ended early, after almost five years, because the results were so clear it was considered unethical to continue.

The diet helped those following it even though they did not lose weight and most of them were already taking statins, or blood pressure or diabetes drugs to lower their heart disease risk.

“Really impressive,” said Rachel Johnson, a professor of nutrition at the University of Vermont and a spokeswoman for the American Heart Association. “And the really important thing — the coolest thing — is that they used very meaningful end points. They did not look at risk factors like cholesterol of hypertension or weight. They looked at heart attacks and strokes and death. At the end of the day, that is what really matters.”

Until now, evidence that the Mediterranean diet reduced the risk of heart disease was weak, based mostly on studies showing that people from Mediterranean countries seemed to have lower rates of heart disease — a pattern that could have been attributed to factors other than diet.

And some experts had been skeptical that the effect of diet could be detected, if it existed at all, because so many people are already taking powerful drugs to reduce heart disease risk, while other experts hesitated to recommend the diet to people who already had weight problems, since oils and nuts have a lot of calories.

Heart disease experts said the study was a triumph because it showed that a diet is powerful in reducing heart disease risk, and it did so using the most rigorous methods. Scientists randomly assigned 7,447 people in Spain who were overweight, were smokers, had diabetes or other risk factors for heart disease to follow the Mediterranean diet or a low-fat one.

Low-fat diets have not been shown in any rigorous way to be helpful, and they are also very hard for patients to maintain — a reality born out in the new study, said Dr. Steven E. Nissen, chairman of the department of cardiovascular medicine at the Cleveland Clinic Foundation.

“Now along comes this group and does a gigantic study in Spain that says you can eat a nicely balanced diet with fruits and vegetables and olive oil and lower heart disease by 30 percent,” he said. “And you can actually enjoy life.”

The study, by Dr. Ramon Estruch, a professor of medicine at the University of Barcelona, and his colleagues, was long in the planning. The investigators traveled the world, seeking advice on how best to answer the question of whether a diet alone could make a big difference in heart disease risk. They visited the Harvard School of Public Health several times to consult Dr. Frank M. Sacks, a professor of cardiovascular disease prevention there.

In the end, they decided to randomly assign subjects at high risk of heart disease to three groups. One would be given a low-fat diet and counseled on how to follow it. The other two groups would be counseled to follow a Mediterranean diet. At first the Mediterranean dieters got more intense support. They met regularly with dietitians while the low-fat group just got an initial visit to train them in how to adhere to the diet followed by a leaflet each year on the diet. Then the researchers decided to add more intensive counseling for them, too, but they still had difficulty staying with the diet.

One group assigned to a Mediterranean diet was given extra virgin olive oil each week and was instructed to use at least 4 tablespoons a day. The other group got a combination of walnuts, almonds and hazelnuts and was instructed to eat about an ounce of them each day. An ounce of walnuts, for example, is about a quarter cup — a generous handful. The mainstays of the diet consisted of at least 3 servings a day of fruits and at least two servings of vegetables. Participants were to eat fish at least three times a week and legumes, which include beans, peas and lentils, at least three times a week. They were to eat white meat instead of red, and, for those accustomed to drinking, to have at least 7 glasses of wine a week with meals.

They were encouraged to avoid commercially made cookies, cakes and pastries and to limit their consumption of dairy products and processed meats.

Read More..

Disruptions: Disruptions: Google Flu Trends Shows Problems of Big Data Without Context

Several years ago, Google, aware of how many of us were sneezing and coughing, created a fancy equation on its Web site to figure out just how many people had influenza. The math works like this: people’s location + flu-related search queries on Google + some really smart algorithms = the number of people with the flu in the United States.

So how did the algorithms fare this wretched winter? According to Google Flu Trends, at the flu season’s peak in mid-January, nearly 11 percent of the United States population had influenza.

Yikes! Take vitamins. Don’t leave the house. Wash your hands. Wash them again!

But wait. According to an article in the science journal Nature, Google’s disease-hunting algorithms were wrong: their results were double the actual estimates by the Centers for Disease Control and Prevention, which put the coughing and sniffling peak at 6 percent of the population.

Kelly Mason, a public affairs spokeswoman for Google, said the company’s Flu Trends site was meant to be only one source in addition to the C.D.C. and other flu surveillance methods. “We review and potentially update our model each season,” she said.

Scientists have a theory about what went wrong, as well.

“Several researchers suggest that the problems may be due to widespread media coverage of this year’s severe U.S. flu season,” Declan Butler wrote in Nature. Then add social media, which helped news of the flu spread quicker than the virus itself.

In other words, Google’s algorithm was looking only at the numbers, not at the context of the search results.

In today’s digitally connected world, data is everywhere: in our phones, search queries, friendships, dating profiles, cars, food, reading habits. Almost everything we touch is part of a larger data set. But the people and companies that interpret the data may fail to apply background and outside conditions to the numbers they capture.

“Data inherently has all of the foibles of being human,” said Mark Hansen, director of the David and Helen Gurley Brown Institute for Media Innovation at Columbia University. “Data is not a magic force in society; it’s an extension of us.”

Society has encountered similar situations for centuries. In the 1600s, Dr. Hansen said, an early census was recorded in England as the Great Plague of London killed tens of thousands of Britons. To calculate the spread of the disease, officials started recording every christening and death in the city. And although this helped quantify the mortality rate, it also created other problems. There was now an astounding collection of statistical information for scientists to review and understand, but it took time to develop systems that could accurately assess the information.

Now, as we enter a world of big data, we have to learn how to apply context to these numbers.

Dr. Hansen said the problem of data without context could be summed up in a quote from the playwright Eugène Ionesco: “Of course, not everything is unsayable in words, only the living truth.”

I experienced this firsthand in the spring of 2010, when I was an adjunct professor at New York University teaching graduate students in the Interactive Telecommunications Program.

I created a class called “Telling Stories With Data, Sensors and Humans,” with the goal of determining whether sensors and data could become reporters and collect information. Students built little electronic contraptions with $30 computers called Arduinos, and attached several sensors, including ones that could detect light, noise and movement.

We wondered if we could use these sensors to determine whether students used the elevators more than the stairs, and whether that changed throughout the day. (Esoteric, sure, but a perfect example of a computer sitting there taking notes, rather than a human.)

We set up the sensors in some elevators and stairwells at N.Y.U. and waited. To our delighted surprise, the data we collected told a story, and it seemed that our experiment had worked.

As I left campus that evening, one of the N.Y.U. security guards who had seen students setting up the computers in the elevators asked how our experiment had gone. I explained that we had found that students seemed to use the elevators in the morning, perhaps because they were tired from staying up late, and switch to the stairs at night, when they became energized.

“Oh, no, they don’t,” the security guard told me, laughing as he assured me that lazy college students used the elevators whenever possible. “One of the elevators broke down a few evenings last week, so they had no choice but to use the stairs.”

E-mail: bilton@nytimes.com

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Top British Cardinal Resigns After Accusations of ‘Inappropriate Acts’

VATICAN CITY — Britain’s most senior Roman Catholic cleric announced his resignation on Monday, a day after being accused of “inappropriate acts” with priests, saying he would not attend the conclave to elect a new pope.

The cleric, Cardinal Keith O’Brien, said that he had submitted his resignation months ago, and the Vatican said Pope Benedict XVI had accepted it on Feb. 18. However, the timing of the announcement — a day after news reports of alleged abuse appeared in Britain —suggested that the Vatican had encouraged the cardinal to stay away from the conclave.

The move is bound to raise questions about other cardinals. It comes amid a campaign by some critics to urge Cardinal Roger Mahony of Los Angeles not to attend the conclave because of his role in moving priests accused of abuse.

It also comes just days after the Vatican Secretariat of State issued a harsh statement against recent media reports —including ones alleging a gay sex scandal inside the Vatican —that cardinals should not be conditioned by external pressures, including from the media, when they vote for the next pope. There are expected to be some 115 cardinals at the gathering.

Vatican watchers said that Cardinal O’Brien’s decision not to attend the conclave was rare.

“It’s quite unprecedented,” said Sandro Magister, a Vatican expert with the Italian weekly L’Espresso. “He made it clear that his resignation came under the pressure of the accusations. His certainly isn’t a frequent case and hasn’t happened in conclaves in recent memory.”

Cardinal O’Brien’s announcement came a day after The Observer newspaper reported that four men had made complaints to the pope’s diplomatic representative in Britain, Antonio Mennini, that reached him the week before Pope Benedict XVI announced Feb. 11 that he would be stepping down as of Feb. 28.

The Observer said that the accusations, which dated back to the 1980s, had been forwarded to theVatican.

Last week, Cardinal O’Brien drew different headlines, telling the BCC that the next pope should consider abandoning the church’s insistence on priestly celibacy, and suggested that it might be time for the papal conclave to choose a new pontiff from Africa or Asia, where church membership has been growing even as it has fallen across Europe and North America.

On Monday, the Vatican spokesman, the Rev. Federico Lombardi, downplayed the connection between the media reports and Cardinal O’Brien’s resignation, which the pope accepted under a norm of church law that says he had reached the normal retirement age of 75.

A statement issued by the media office of the Roman Catholic Church in Scotland said Cardinal O’Brien had informed the pope some time ago of his intention to resign as archbishop of St. Andrews and Edinburgh as his 75th birthday approached on March 17 but that no date had been set.

The cardinal said in the statement: “The Holy Father has now decided that my resignation will take effect today, 25 February 2013.”

“Looking back over my years of ministry: For any good I have been able to do, I thank God,” he said. “For any failures, I apologize to all whom I have offended.”

“I also ask God’s blessing on my brother cardinals who will soon gather in Rome,” the statement said, adding, “I will not join them for this conclave in person. I do not wish media attention in Rome to be focused on me — but rather on Pope Benedict XVI and on his successor.”

Cardinal O’Brien, whose office had initially said he would fly to Rome before the conclave, has been the head of the Catholic Church in Scotland since 1985, and was named a cardinal by Pope John Paul II in 2003. He was among the cardinals who attended the conclave that chose Benedict as John Paul’s successor in 2005.

The main role of a cardinal is to elect a new pope and they remain eligible to vote under any circumstances, even if they have been excommunicated, Bishop Juan Ignacio Arrieta, the secretary for the Pontifical Council for Legislative Texts, said last week.

Ambrogio Piazzoni, a papal historian, told reporters last week that he could think of no examples of cardinals who refrained from voting for anything other than health reasons — or from the pressures of different governments in past years.

On Monday, Benedict changed the laws governing the conclave to allow cardinals to decide to move up the start date before the traditional 15-20 day waiting period after the papacy is vacant. He also met with three cardinals who had conducted a secret investigation into a scandal of leaked documents and ruled that the contents of their report would be known only to his successor — not to the cardinals entering the conclave.

Alan Cowell contributed reporting from London.

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