Libel Case That Snared BBC Widens to Twitter

PARIS — The Internet, it is sometimes said, turns every citizen into a journalist. If that is the case, some Twitter users in Britain are discovering one of the downsides of the business.

As many as 10,000 Twitter users reportedly face the threat of legal action because of comments posted on the Internet or forwarded to others in which they referred to a BBC report wrongly linking a former Conservative Party official to the sexual abuse of a child. The official, Alistair McAlpine, was not named in the Nov. 2 BBC report, but enough clues were provided that Twitter users were able to identify him — which they did, in great numbers.

The BBC quickly settled a libel claim, paying Mr. McAlpine £185,000, or nearly $300,000, and apologized for the error as a case of mistaken identity. Another British television broadcaster, ITV, agreed on Thursday to pay Mr. McAlpine £125,000 to settle another claim, this one over a subsequent broadcast in which a list purporting to show Conservative figures linked to sex abuse accusations had been visible to viewers.

Mr. McAlpine did not stop with the mainstream media. On Friday, a spokeswoman for the politician told The Guardian newspaper that his lawyers had identified 20 “high-profile tweeters” from whom they were seeking libel damages. Among them were a comedian, Alan Davies; Sally Bercow, the wife of John Bercow, the speaker of the House of Commons; and George Monbiot, a Guardian columnist.

There have been previous libel suits over comments posted on Twitter, a site that lets users write short messages to their followers. In March, a New Zealand cricket player, Chris Cairns, was awarded £90,000 by the High Court in London over a Twitter post by an Indian cricket official in which he falsely accused Mr. Cairns of match-fixing.

But the campaign by Mr. McAlpine appears to be the broadest yet, and it employs some novel tactics.

“Many people have had their reputations trashed on Twitter before, but nobody has decided to take action on this scale,” said Tim Lowles, a media lawyer at Collyer Bristow in London.

In addition to the prominent figures, Mr. McAlpine is reportedly pursuing action against thousands of other Twitter users, including people who had merely repeated to their own followers comments made by others.

Twitter users with fewer than 500 online followers who are “wishing to apologize and make contact” can use a Web site created by Mr. McAlpine’s law firm, R.M.P.I., to try to settle their cases.

“It is not this firm or Lord McAlpine’s intention to create any hardship,” a letter posted on the site states.

All that Twitter users who think they might have libeled Mr. McAlpine have to do is read the letter, fill out a downloadable form asking them for details of the postings in question, make an apology and send the form back via e-mail. Those who respond are reportedly asked to make donations to charity, and the firm warns that there will also be a “small administrative charge.”

British libel and defamation laws are notoriously friendly to claimants. While a planned overhaul would give publishers a bit more protection, the rise of social media like Twitter has vastly expanded the possibilities for libeling someone.

Some of the Twitter posts in question do not directly mention the offense to which Mr. McAlpine was falsely linked. The posting by Ms. Bercow asked, “Why is Lord McAlpine trending? *innocent face*” She insisted in a subsequent post that her initial comment had not been libelous.

Mr. Lowles said that under British law it was possible to libel someone indirectly or by innuendo, even if the incorrect accusations were not mentioned directly, as long as they were clear from the context.

It is not clear how far Mr. McAlpine intends to go in pursuing Twitter users who commented on the BBC accusations. R.M.P.I. did not return calls.

Some people register on Twitter anonymously or under fake names. British courts have ruled in previous cases that Internet companies like Twitter can be ordered to turn over the personal details of users, but this can be time-consuming and costly. A Twitter spokeswoman in Britain declined to comment on whether the company had received any such requests.

Like other social media companies, Twitter considers itself a conduit for its users but disavows responsibility for the content of the 400 million comments posted daily. The site’s guidelines state that users bear this burden.

“Most people still don’t think when they write something on Twitter that they are actually publishing,” Mr. Lowles said. “Whether or not this will act as a deterrent, I don’t know. People should think before they tweet.”

Could the threat of libel action dissuade Britons from posting on Twitter? By Friday, at least one prominent Twitter account had disappeared — that of Ms. Bercow, who had more than 50,000 followers, and who had followed up her comments on Mr. McAlpine with an apparent mistake in a different case: she appeared to have violated a court order by naming a British teenager who had been abducted by one of her teachers.

“This could have a chilling effect,” Paul Bernal, a lecturer in media law at the University of East Anglia, said of the McAlpine case. “I know people who have said that they are not going to post as much because of this.”

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Agency Investigates Deaths and Injuries Associated With Bed Rails

Thomas Patterson for The New York Times

Gloria Black’s mother died in her bed at a care facility.

In November 2006, when Clara Marshall began suffering from the effects of dementia, her family moved her into the Waterford at Fairway Village, an assisted living home in Vancouver, Wash. The facility offered round-the-clock care for Ms. Marshall, who had wandered away from home several times. Her husband Dan, 80 years old at the time, felt he could no longer care for her alone.

Thomas Patterson for The New York Times

Gloria Black, visiting her mother’s grave in Portland, Ore. She has documented hundreds of deaths associated with bed rails and said families should be informed of their possible risks.

But just five months into her stay, Ms. Marshall, 81, was found dead in her room apparently strangled after getting her neck caught in side rails used to prevent her from rolling out of bed.

After Ms. Marshall’s death, her daughter Gloria Black, who lives in Portland, Ore., began writing to the Consumer Product Safety Commission and the Food and Drug Administration. What she discovered was that both agencies had known for more than a decade about deaths from bed rails but had done little to crack down on the companies that make them. Ms. Black conducted her own research and exchanged letters with local and state officials. Finally, a letter she wrote in 2010 to the federal consumer safety commission helped prompt a review of bed rail deaths.

Ms. Black applauds the decision to study the issue. “But I wish it was done years ago,” she said. “Maybe my mother would still be alive.” Now the government is studying a problem it has known about for years.

Data compiled by the consumer agency from death certificates and hospital emergency room visits from 2003 through May 2012 shows that 150 mostly older adults died after they became trapped in bed rails. Over nearly the same time period, 36,000 mostly older adults — about 4,000 a year — were treated in emergency rooms with bed rail injuries. Officials at the F.D.A. and the commission said the data probably understated the problem since bed rails are not always listed as a cause of death by nursing homes and coroners, or as a cause of injury by emergency room doctors.

Experts who have studied the deaths say they are avoidable. While the F.D.A. issued safety warnings about the devices in 1995, it shied away from requiring manufacturers to put safety labels on them because of industry resistance and because the mood in Congress then was for less regulation. Instead only “voluntary guidelines” were adopted in 2006.

More warnings are needed, experts say, but there is a technical question over which regulator is responsible for some bed rails. Are they medical devices under the purview of the F.D.A., or are they consumer products regulated by the commission?

“This is an entirely preventable problem,” said Dr. Steven Miles, a professor at the Center for Bioethics at the University of Minnesota, who first alerted federal regulators to deaths involving bed rails in 1995. The government at the time declined to recall any bed rails and opted instead for a safety alert to nursing homes and home health care agencies.

Forcing the industry to improve designs and replace older models could have potentially cost bed rail makers and health care facilities hundreds of million of dollars, said Larry Kessler, a former F.D.A. official who headed its medical device office. “Quite frankly, none of the bed rails in use at that time would have passed the suggested design standards in the guidelines if we had made them mandatory,” he said. No analysis has been done to determine how much it would cost the manufacturers to reduce the hazards.

Bed rails are metal bars used on hospital beds and in home care to assist patients in pulling themselves up or helping them out of bed. They can also prevent people from rolling out of bed. But sometimes patients — particularly those suffering from Alzheimer’s — can get confused and trapped between a bed rail and a mattress, which can lead to serious injury or even death.

While the use of the devices by hospitals and nursing homes has declined as professional caregivers have grown aware of the dangers, experts say dozens of older adults continue to die each year as more rails are used in home care and many health care facilities continue to use older rail models.

Since those first warnings in 1995, about 550 bed rail-related deaths have occurred, a review by The New York Times of F.D.A. data, lawsuits, state nursing home inspection reports and interviews, found. Last year alone, the F.D.A. data shows, 27 people died.

As deaths continued after the F.D.A. warning, a working group put together in 1999 and made up of medical device makers, researchers, patient advocates and F.D.A. officials considered requiring bed rail makers to add warning labels.

But the F.D.A. decided against it after manufacturers resisted, citing legal issues. The agency said added cost to small manufacturers and difficulties of getting regulations through layers of government approval, were factors against tougher standards, according to a meeting log of the group in 2000 and interviews.

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Agency Investigates Deaths and Injuries Associated With Bed Rails

Thomas Patterson for The New York Times

Gloria Black’s mother died in her bed at a care facility.

In November 2006, when Clara Marshall began suffering from the effects of dementia, her family moved her into the Waterford at Fairway Village, an assisted living home in Vancouver, Wash. The facility offered round-the-clock care for Ms. Marshall, who had wandered away from home several times. Her husband Dan, 80 years old at the time, felt he could no longer care for her alone.

Thomas Patterson for The New York Times

Gloria Black, visiting her mother’s grave in Portland, Ore. She has documented hundreds of deaths associated with bed rails and said families should be informed of their possible risks.

But just five months into her stay, Ms. Marshall, 81, was found dead in her room apparently strangled after getting her neck caught in side rails used to prevent her from rolling out of bed.

After Ms. Marshall’s death, her daughter Gloria Black, who lives in Portland, Ore., began writing to the Consumer Product Safety Commission and the Food and Drug Administration. What she discovered was that both agencies had known for more than a decade about deaths from bed rails but had done little to crack down on the companies that make them. Ms. Black conducted her own research and exchanged letters with local and state officials. Finally, a letter she wrote in 2010 to the federal consumer safety commission helped prompt a review of bed rail deaths.

Ms. Black applauds the decision to study the issue. “But I wish it was done years ago,” she said. “Maybe my mother would still be alive.” Now the government is studying a problem it has known about for years.

Data compiled by the consumer agency from death certificates and hospital emergency room visits from 2003 through May 2012 shows that 150 mostly older adults died after they became trapped in bed rails. Over nearly the same time period, 36,000 mostly older adults — about 4,000 a year — were treated in emergency rooms with bed rail injuries. Officials at the F.D.A. and the commission said the data probably understated the problem since bed rails are not always listed as a cause of death by nursing homes and coroners, or as a cause of injury by emergency room doctors.

Experts who have studied the deaths say they are avoidable. While the F.D.A. issued safety warnings about the devices in 1995, it shied away from requiring manufacturers to put safety labels on them because of industry resistance and because the mood in Congress then was for less regulation. Instead only “voluntary guidelines” were adopted in 2006.

More warnings are needed, experts say, but there is a technical question over which regulator is responsible for some bed rails. Are they medical devices under the purview of the F.D.A., or are they consumer products regulated by the commission?

“This is an entirely preventable problem,” said Dr. Steven Miles, a professor at the Center for Bioethics at the University of Minnesota, who first alerted federal regulators to deaths involving bed rails in 1995. The government at the time declined to recall any bed rails and opted instead for a safety alert to nursing homes and home health care agencies.

Forcing the industry to improve designs and replace older models could have potentially cost bed rail makers and health care facilities hundreds of million of dollars, said Larry Kessler, a former F.D.A. official who headed its medical device office. “Quite frankly, none of the bed rails in use at that time would have passed the suggested design standards in the guidelines if we had made them mandatory,” he said. No analysis has been done to determine how much it would cost the manufacturers to reduce the hazards.

Bed rails are metal bars used on hospital beds and in home care to assist patients in pulling themselves up or helping them out of bed. They can also prevent people from rolling out of bed. But sometimes patients — particularly those suffering from Alzheimer’s — can get confused and trapped between a bed rail and a mattress, which can lead to serious injury or even death.

While the use of the devices by hospitals and nursing homes has declined as professional caregivers have grown aware of the dangers, experts say dozens of older adults continue to die each year as more rails are used in home care and many health care facilities continue to use older rail models.

Since those first warnings in 1995, about 550 bed rail-related deaths have occurred, a review by The New York Times of F.D.A. data, lawsuits, state nursing home inspection reports and interviews, found. Last year alone, the F.D.A. data shows, 27 people died.

As deaths continued after the F.D.A. warning, a working group put together in 1999 and made up of medical device makers, researchers, patient advocates and F.D.A. officials considered requiring bed rail makers to add warning labels.

But the F.D.A. decided against it after manufacturers resisted, citing legal issues. The agency said added cost to small manufacturers and difficulties of getting regulations through layers of government approval, were factors against tougher standards, according to a meeting log of the group in 2000 and interviews.

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M.I.T. Lab Hatches Ideas, and Companies, by the Dozens

HOW do you take particles in a test tube, or components in a tiny chip, and turn them into a $100 million company?

Dr. Robert Langer, 64, knows how. Since the 1980s, his Langer Lab at the Massachusetts Institute of Technology has spun out companies whose products treat cancer, diabetes, heart disease and schizophrenia, among other diseases, and even thicken hair.

The Langer Lab is on the front lines of turning discoveries made in the lab into a range of drugs and drug delivery systems. Without this kind of technology transfer, the thinking goes, scientific discoveries might well sit on the shelf, stifling innovation.

A chemical engineer by training, Dr. Langer has helped start 25 companies and has 811 patents, issued or pending, to his name. That’s not too far behind Thomas Edison, who had 1,093. More than 250 companies have licensed or sublicensed Langer Lab patents.

Polaris Venture Partners, a Boston venture capital firm, has invested $220 million in 18 Langer Lab-inspired businesses. Combined, these businesses have improved the health of many millions of people, says Terry McGuire, co-founder of Polaris.

Along the way, Dr. Langer and his lab, including about 60 postdoctoral and graduate students at a time, have found a way to navigate some slippery territory: the intersection of academic research and the commercial market.

Over the last 30 years, many universities — including M.I.T. — have set up licensing offices that oversee the transfer of scientific discoveries to companies. These offices have become a major pathway for universities seeking to put their research to practical use, not to mention add to their revenue streams.

In the sciences in particular, technology transfer has become a key way to bring drugs and other treatments to market. “The model of biomedical innovation relies on research coming out of universities, often funded by public money,” says Josephine Johnston, director of research at the Hastings Center, a bioethics research organization based in Garrison, N.Y.

Just a few of the products that have emerged from the Langer Lab are a small wafer that delivers a dose of chemotherapy used to treat brain cancer; sugar-sequencing tools that can be used to create new drugs like safer and more effective blood thinners; and a miniaturized chip (a form of nanotechnology) that can test for diseases.

The chemotherapy wafer, called the Gliadel, is licensed by Eisai Inc. The company behind the sugar-sequencing tools, Momenta Pharmaceuticals, raised $28.4 million in an initial public offering in 2004. The miniaturized chip is made by T2Biosystems,  which completed a $23 million round of financing in the summer of 2011.

“It’s inconvenient to have to send things to a lab,” so the company is trying to develop more sophisticated methods, says Dr. Ralph Weissleder, a co-founder, with Dr. Langer and others, of T2Biosystems and a professor at Harvard Medical School.

FOR Dr. Langer, starting a company is not the same as it was, say, for Mark Zuckerberg with Facebook. “Bob is not consumed with any one company,” says H. Kent Bowen, an emeritus professor of business administration at Harvard Business School who wrote a case study on the Langer Lab. “His mission is to create the idea.”

Dr. Bowen observes that there are many other academic laboratories, including highly productive ones, but that the Langer Lab’s combination of people, spun-out companies and publications sets it apart. He says Dr. Langer “walks into the great unknown and then makes these discoveries.”

Dr. Langer is well known for his mentoring abilities. He is “notorious for replying to e-mail in two minutes, whether it’s a lowly graduate school student or the president of the United States,” says Paulina Hill, who worked in his lab from 2009 to 2011 and is now a senior associate at Polaris Venture Partners. (According to Dr. Langer, he has corresponded directly with President Obama about stem cell research and federal funds for the sciences.)

Dr. Langer says he looks at his students “as an extended family,” adding that “I really want them to do well.”

And they have, whether in business or in academia, or a combination of the two. One former student, Ram Sasisekharan, helped found Momenta and now runs his own lab at M.I.T. Ganesh Venkataraman Kaundinya is Momenta’s chief scientific officer and senior vice president for research.

Hongming Chen is vice president of research at Kala Pharmaceuticals. Howard Bernstein is chief scientific officer at Seventh Sense Biosystems, a blood-testing company. Still others have taken jobs in the law or in government.

Dr. Langer says he spends about eight hours a week working on companies that come out of his lab. Of the 25 that he helped start, he serves on the boards of 12 and is an informal adviser to 4. All of his entrepreneurial activity, which includes some equity stakes, has made him a millionaire. But he says he is mainly motivated by a desire to improve people’s health.

Operating from the sixth floor of the David H. Koch Institute for Integrative Cancer Research on the M.I.T. campus in Cambridge, Mass., Dr. Langer’s lab has a research budget of more than $10 million for 2012, coming mostly from federal sources.

The research in labs like Dr. Langer’s is eyed closely by pharmaceutical companies. While drug companies employ huge research and development teams, they may not be as freewheeling and nimble, Dr. Langer says. The basis for many long-range discoveries has “come out of academia, including gene therapy, gene sequencing and tissue engineering,” he says.

He has served as a consultant to pharmaceutical companies. Their large size, he says, can end up being an impediment.

“Very often when you are going for real innovation,” he says, “you have to go against prevailing wisdom, and it’s hard to go against prevailing wisdom when there are people who have been there for a long time and you have some vice president who says, ‘No, that doesn’t make sense.’ ”

Pharmaceutical companies are eager to tap into the talent at leading research universities. In 2008, for example, Washington University in St. Louis announced a $25 million pact with Pfizer to collaborate more closely on biomedical research.

But in some situations, the close — critics might say cozy — ties between business and academia have the potential to create conflicts of interest.

There was a controversy earlier this year when it was revealed that the president of the University of Texas M.D. Anderson Cancer Center owned stock in Aveo Oncology, which had announced earlier that the university would be leading clinical trials of one of its cancer drugs.  Last month, the University of Texas announced that he would be allowed to keep his ties with three pharmaceutical companies, including Aveo Oncology; his holdings will be placed in a blind trust.

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Protests Erupt After Egypt’s Leader Seizes New Power

Tara Todras-Whitehill for The New York Times

Egyptians in central Cairo ran from tear gas during clashes with the police on Friday. Protesters took to the streets in several cities. More Photos »

CAIRO — Protests erupted across Egypt on Friday, as opponents of President Mohamed Morsi clashed with his supporters over a presidential edict that gave him unchecked authority and polarized an already divided nation while raising a specter, the president’s critics charged, of a return to autocracy.  

In an echo of the uprising 22 months ago, thousands of protesters chanted for the downfall of Mr. Morsi’s government in Cairo, while others ransacked the offices of the president’s former party in Suez, Alexandria and other cities.

Mr. Morsi spoke to his supporters in front of the presidential palace here, imploring the public to trust his intentions as he cast himself as a protector of the revolution and a fledgling democracy.

In a speech that was by turns defensive and conciliatory, he ultimately gave no ground to the critics who now were describing him as a pharaoh, in another echo of the insult once reserved for the deposed president, Hosni Mubarak.

“God’s will and elections made me the captain of this ship,” Mr. Morsi said.

The battles that raged on Friday — over power, legitimacy and the mantle of the revolution — posed a sharp challenge not only to Mr. Morsi but also to his opponents, members of secular, leftist and liberal groups whose crippling divisions have stifled their agenda and left them unable to confront the more popular Islamist movement led by the Muslim Brotherhood.

The crisis over his power grab came just days after the Islamist leader won international praise for his pragmatism, including from the United States, for brokering a cease-fire between Hamas and Israel.

On Friday, the State Department expressed muted concern over Mr. Morsi’s decision. “One of the aspirations of the revolution was to ensure that power would not be overly concentrated in the hands of any one person or institution,” said the State Department spokeswoman, Victoria Nuland.

She said, “The current constitutional vacuum in Egypt can only be resolved by the adoption of a constitution that includes checks and balances, and respects fundamental freedoms, individual rights and the rule of law consistent with Egypt’s international commitments.”

But the White House was notably silent after it had earlier this week extolled the emerging relationship between President Obama and Mr. Morsi and credited a series of telephone calls between the two men with helping to mediate the cease-fire in Gaza.

For Mr. Morsi, who seemed to be saying to the nation that it needed to surrender the last checks on his power in order to save democracy from Mubarak-era judges, the challenge was to convince Egyptians that the ends justified his means.

But even as he tried, thousands of protesters marched to condemn his decision. Clashes broke out between the president’s supporters and his critics, and near Tahrir Square, the riot police fired tear gas and bird shot as protesters hurled stones and set fires.

Since Thursday, when Mr. Morsi issued the decree, the president and his supporters have argued that he acted precisely to gain the power to address the complaints of his critics, including the families of protesters killed during the uprising and its aftermath.

By placing his decisions above judicial review, the decree enabled him to replace a public prosecutor who had failed to win convictions against senior officers implicated in the killings of protesters.

The president and his supporters also argued that the decree insulated the Constituent Assembly, which is drafting the constitution, from meddling by Mubarak-era judges.

Since Mr. Mubarak’s ouster, courts have dissolved Parliament, kept a Mubarak loyalist as top prosecutor and disbanded the first Assembly.

But by ending legal appeals, the decree also removed a safety valve for critics who say the Islamist majority is dominating the drafting of the constitution.

Mayy El Sheikh contributed reporting from Cairo, and Helene Cooper from Washington.

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G.E. Looks to Industry for the Next Digital Disruption

SAN RAMON, Calif. — When Sharoda Paul finished a postdoctoral fellowship last year at the Palo Alto Research Center, she did what most of her peers do — considered a job at a big Silicon Valley company, in her case, Google. But instead, Ms. Paul, a 31-year-old expert in social computing, went to work for General Electric.

Ms. Paul is one of more than 250 engineers recruited in the last year and a half to G.E.’s new software center here, in the East Bay of San Francisco. The company plans to increase that work force of computer scientists and software developers to 400, and to invest $1 billion in the center by 2015. The buildup is part of G.E’s big bet on what it calls the “industrial Internet,” bringing digital intelligence to the physical world of industry as never before.

The concept of Internet-connected machines that collect data and communicate, often called the “Internet of Things,” has been around for years. Information technology companies, too, are pursuing this emerging field. I.B.M. has its “Smarter Planet” projects, while Cisco champions the “Internet of Everything.”

But G.E.’s effort, analysts say, shows that Internet-era technology is ready to sweep through the industrial economy much as the consumer Internet has transformed media, communications and advertising over the last decade.

In recent months, Ms. Paul has donned a hard hat and safety boots to study power plants. She has ridden on a rail locomotive and toured hospital wards. “Here, you get to work with things that touch people in so many ways,” she said. “That was a big draw.”

G.E. is the nation’s largest industrial company, a producer of aircraft engines, power plant turbines, rail locomotives and medical imaging equipment. It makes the heavy-duty machinery that transports people, heats homes and powers factories, and lets doctors diagnose life-threatening diseases.

G.E. resides in a different world from the consumer Internet. But the major technologies that animate Google and Facebook are also vital ingredients in the industrial Internet — tools from artificial intelligence, like machine-learning software, and vast streams of new data. In industry, the data flood comes mainly from smaller, more powerful and cheaper sensors on the equipment.

Smarter machines, for example, can alert their human handlers when they will need maintenance, before a breakdown. It is the equivalent of preventive and personalized care for equipment, with less downtime and more output.

“These technologies are really there now, in a way that is practical and economic,” said Mark M. Little, G.E.’s senior vice president for global research.

G.E.’s embrace of the industrial Internet is a long-term strategy. But if its optimism proves justified, the impact could be felt across the economy.

The outlook for technology-led economic growth is a subject of considerable debate. In a recent research paper, Robert J. Gordon, a prominent economist at Northwestern University, argues that the gains from computing and the Internet have petered out in the last eight years.

Since 2000, Mr. Gordon asserts, invention has focused mainly on consumer and communications technologies, including smartphones and tablet computers. Such devices, he writes, are “smaller, smarter and more capable, but do not fundamentally change labor productivity or the standard of living” in the way that electric lighting or the automobile did.

But others say such pessimism misses the next wave of technology. “The reason I think Bob Gordon is wrong is precisely because of the kind of thing G.E. is doing,” said Andrew McAfee, principal research scientist at M.I.T.’s Center for Digital Business.

Today, G.E. is putting sensors on everything, be it a gas turbine or a hospital bed. The mission of the engineers in San Ramon is to design the software for gathering data, and the clever algorithms for sifting through it for cost savings and productivity gains. Across the industries it covers, G.E. estimates such efficiency opportunities at as much as $150 billion.

Some industrial Internet projects are already under way. First Wind, an owner and operator of 16 wind farms in America, is a G.E. customer for wind turbines. It has been experimenting with upgrades that add more sensors, controls and optimization software.

The new sensors measure temperature, wind speeds, location and pitch of the blades. They collect three to five times as much data as the sensors on turbines of a few years ago, said Paul Gaynor, chief executive of First Wind. The data is collected and analyzed by G.E. software, and the operation of each turbine can be tweaked for efficiency. For example, in very high winds, turbines across an entire farm are routinely shut down to prevent damage from rotating too fast. But more refined measurement of wind speeds might mean only a portion of the turbines need to be shut down. In wintry conditions, turbines can detect when they are icing up, and speed up or change pitch to knock off the ice.

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Scientists See Advances in Deep Learning, a Part of Artificial Intelligence

Hao Zhang/The New York Times

A voice recognition program translated a speech given by Richard F. Rashid, Microsoft’s top scientist, into Mandarin Chinese.

Using an artificial intelligence technique inspired by theories about how the brain recognizes patterns, technology companies are reporting startling gains in fields as diverse as computer vision, speech recognition and the identification of promising new molecules for designing drugs.

The advances have led to widespread enthusiasm among researchers who design software to perform human activities like seeing, listening and thinking. They offer the promise of machines that converse with humans and perform tasks like driving cars and working in factories, raising the specter of automated robots that could replace human workers.

The technology, called deep learning, has already been put to use in services like Apple’s Siri virtual personal assistant, which is based on Nuance Communications’ speech recognition service, and in Google’s Street View, which uses machine vision to identify specific addresses.

But what is new in recent months is the growing speed and accuracy of deep-learning programs, often called artificial neural networks or just “neural nets” for their resemblance to the neural connections in the brain.

“There has been a number of stunning new results with deep-learning methods,” said Yann LeCun, a computer scientist at New York University who did pioneering research in handwriting recognition at Bell Laboratories. “The kind of jump we are seeing in the accuracy of these systems is very rare indeed.”

Artificial intelligence researchers are acutely aware of the dangers of being overly optimistic. Their field has long been plagued by outbursts of misplaced enthusiasm followed by equally striking declines.

In the 1960s, some computer scientists believed that a workable artificial intelligence system was just 10 years away. In the 1980s, a wave of commercial start-ups collapsed, leading to what some people called the “A.I. winter.”

But recent achievements have impressed a wide spectrum of computer experts. In October, for example, a team of graduate students studying with the University of Toronto computer scientist Geoffrey E. Hinton won the top prize in a contest sponsored by Merck to design software to help find molecules that might lead to new drugs.

From a data set describing the chemical structure of 15 different molecules, they used deep-learning software to determine which molecule was most likely to be an effective drug agent.

The achievement was particularly impressive because the team decided to enter the contest at the last minute and designed its software with no specific knowledge about how the molecules bind to their targets. The students were also working with a relatively small set of data; neural nets typically perform well only with very large ones.

“This is a really breathtaking result because it is the first time that deep learning won, and more significantly it won on a data set that it wouldn’t have been expected to win at,” said Anthony Goldbloom, chief executive and founder of Kaggle, a company that organizes data science competitions, including the Merck contest.

Advances in pattern recognition hold implications not just for drug development but for an array of applications, including marketing and law enforcement. With greater accuracy, for example, marketers can comb large databases of consumer behavior to get more precise information on buying habits. And improvements in facial recognition are likely to make surveillance technology cheaper and more commonplace.

Artificial neural networks, an idea going back to the 1950s, seek to mimic the way the brain absorbs information and learns from it. In recent decades, Dr. Hinton, 64 (a great-great-grandson of the 19th-century mathematician George Boole, whose work in logic is the foundation for modern digital computers), has pioneered powerful new techniques for helping the artificial networks recognize patterns.

Modern artificial neural networks are composed of an array of software components, divided into inputs, hidden layers and outputs. The arrays can be “trained” by repeated exposures to recognize patterns like images or sounds.

These techniques, aided by the growing speed and power of modern computers, have led to rapid improvements in speech recognition, drug discovery and computer vision.

Deep-learning systems have recently outperformed humans in certain limited recognition tests.

Last year, for example, a program created by scientists at the Swiss A. I. Lab at the University of Lugano won a pattern recognition contest by outperforming both competing software systems and a human expert in identifying images in a database of German traffic signs.

The winning program accurately identified 99.46 percent of the images in a set of 50,000; the top score in a group of 32 human participants was 99.22 percent, and the average for the humans was 98.84 percent.

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Scientists See Advances in Deep Learning, a Part of Artificial Intelligence

Hao Zhang/The New York Times

A voice recognition program translated a speech given by Richard F. Rashid, Microsoft’s top scientist, into Mandarin Chinese.

Using an artificial intelligence technique inspired by theories about how the brain recognizes patterns, technology companies are reporting startling gains in fields as diverse as computer vision, speech recognition and the identification of promising new molecules for designing drugs.

The advances have led to widespread enthusiasm among researchers who design software to perform human activities like seeing, listening and thinking. They offer the promise of machines that converse with humans and perform tasks like driving cars and working in factories, raising the specter of automated robots that could replace human workers.

The technology, called deep learning, has already been put to use in services like Apple’s Siri virtual personal assistant, which is based on Nuance Communications’ speech recognition service, and in Google’s Street View, which uses machine vision to identify specific addresses.

But what is new in recent months is the growing speed and accuracy of deep-learning programs, often called artificial neural networks or just “neural nets” for their resemblance to the neural connections in the brain.

“There has been a number of stunning new results with deep-learning methods,” said Yann LeCun, a computer scientist at New York University who did pioneering research in handwriting recognition at Bell Laboratories. “The kind of jump we are seeing in the accuracy of these systems is very rare indeed.”

Artificial intelligence researchers are acutely aware of the dangers of being overly optimistic. Their field has long been plagued by outbursts of misplaced enthusiasm followed by equally striking declines.

In the 1960s, some computer scientists believed that a workable artificial intelligence system was just 10 years away. In the 1980s, a wave of commercial start-ups collapsed, leading to what some people called the “A.I. winter.”

But recent achievements have impressed a wide spectrum of computer experts. In October, for example, a team of graduate students studying with the University of Toronto computer scientist Geoffrey E. Hinton won the top prize in a contest sponsored by Merck to design software to help find molecules that might lead to new drugs.

From a data set describing the chemical structure of 15 different molecules, they used deep-learning software to determine which molecule was most likely to be an effective drug agent.

The achievement was particularly impressive because the team decided to enter the contest at the last minute and designed its software with no specific knowledge about how the molecules bind to their targets. The students were also working with a relatively small set of data; neural nets typically perform well only with very large ones.

“This is a really breathtaking result because it is the first time that deep learning won, and more significantly it won on a data set that it wouldn’t have been expected to win at,” said Anthony Goldbloom, chief executive and founder of Kaggle, a company that organizes data science competitions, including the Merck contest.

Advances in pattern recognition hold implications not just for drug development but for an array of applications, including marketing and law enforcement. With greater accuracy, for example, marketers can comb large databases of consumer behavior to get more precise information on buying habits. And improvements in facial recognition are likely to make surveillance technology cheaper and more commonplace.

Artificial neural networks, an idea going back to the 1950s, seek to mimic the way the brain absorbs information and learns from it. In recent decades, Dr. Hinton, 64 (a great-great-grandson of the 19th-century mathematician George Boole, whose work in logic is the foundation for modern digital computers), has pioneered powerful new techniques for helping the artificial networks recognize patterns.

Modern artificial neural networks are composed of an array of software components, divided into inputs, hidden layers and outputs. The arrays can be “trained” by repeated exposures to recognize patterns like images or sounds.

These techniques, aided by the growing speed and power of modern computers, have led to rapid improvements in speech recognition, drug discovery and computer vision.

Deep-learning systems have recently outperformed humans in certain limited recognition tests.

Last year, for example, a program created by scientists at the Swiss A. I. Lab at the University of Lugano won a pattern recognition contest by outperforming both competing software systems and a human expert in identifying images in a database of German traffic signs.

The winning program accurately identified 99.46 percent of the images in a set of 50,000; the top score in a group of 32 human participants was 99.22 percent, and the average for the humans was 98.84 percent.

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Military Analysis: For Israel, Gaza Conflict Is Test for an Iran Confrontation

Menahem Kahana/Agence France-Presse — Getty Images

An Israeli missile is launched from a battery. Officials said their antimissile system shot down 88 percent of all assigned targets.

WASHINGTON — The conflict that ended, for now, in a cease-fire between Hamas and Israel seemed like the latest episode in a periodic showdown. But there was a second, strategic agenda unfolding, according to American and Israeli officials: The exchange was something of a practice run for any future armed confrontation with Iran, featuring improved rockets that can reach Jerusalem and new antimissile systems to counter them.

It is Iran, of course, that most preoccupies Prime Minister Benjamin Netanyahu and President Obama. While disagreeing on tactics, both have made it clear that time is short, probably measured in months, to resolve the standoff over Iran’s nuclear program.

And one key to their war-gaming has been cutting off Iran’s ability to slip next-generation missiles into the Gaza Strip or Lebanon, where they could be launched by Iran’s surrogates, Hamas, Hezbollah and Islamic Jihad, during any crisis over sanctions or an Israeli strike on Iran’s nuclear facilities.

Michael B. Oren, the Israeli ambassador to the United States and a military historian, likened the insertion of Iranian missiles into Gaza to the Cuban missile crisis.

“In the Cuban missile crisis, the U.S. was not confronting Cuba, but rather the Soviet Union,” Mr. Oren said Wednesday, as the cease-fire was declared. “In Operation Pillar of Defense,” the name the Israel Defense Force gave the Gaza operation, “Israel was not confronting Gaza, but Iran.”

It is an imprecise analogy. What the Soviet Union was slipping into Cuba 50 years ago was a nuclear arsenal. In Gaza, the rockets and parts that came from Iran were conventional, and, as the Israelis learned, still have significant accuracy problems. But from one point of view, Israel was using the Gaza battle to learn the capabilities of Hamas and Islamic Jihad — the group that has the closest ties to Iran — as well as to disrupt those links.

Indeed, the first strike in the eight-day conflict between Hamas and Israel arguably took place nearly a month before the fighting began — in Khartoum, the capital of Sudan, as another mysterious explosion in the shadow war with Iran.

A factory said to be producing light arms blew up in spectacular fashion on Oct. 22, and within two days the Sudanese charged that it had been hit by four Israeli warplanes that easily penetrated the country’s airspace. Israelis will not talk about it. But Israeli and American officials maintain that Sudan has long been a prime transit point for smuggling Iranian Fajr rockets, the kind that Hamas launched against Tel Aviv and Jerusalem over recent days.

The missile defense campaign that ensued over Israeli territory is being described as the most intense yet in real combat anywhere — and as having the potential to change warfare in the same way that novel applications of air power in the Spanish Civil War shaped combat in the skies ever since.

Of course, a conflict with Iran, if a last-ditch effort to restart negotiations fails, would look different than what has just occurred. Just weeks before the outbreak in Gaza, the United States and European and Persian Gulf Arab allies were practicing at sea, working on clearing mines that might be dropped in shipping lanes in the Strait of Hormuz.

But in the Israeli and American contingency planning, Israel would face three tiers of threat in a conflict with Iran: the short-range missiles that have been lobbed in this campaign, medium-range rockets fielded by Hezbollah in Lebanon and long-range missiles from Iran.

The last of those three could include the Shahab-3, the missile Israeli and American intelligence believe could someday be fitted with a nuclear weapon if Iran ever succeeded in developing one and — the harder task — shrinking it to fit a warhead.

A United States Army air defense officer said that the American and Israeli militaries were “absolutely learning a lot” from this campaign that may contribute to a more effective “integration of all those tiered systems into a layered approach.”

The goal, and the challenge, is to link short-, medium- and long-range missile defense radar systems and interceptors against the different types of threats that may emerge in the next conflict.

Even so, a historic battle of missile versus missile defense has played out in the skies over Israel, with Israeli officials saying their Iron Dome system shot down 350 incoming rockets — 88 percent of all targets assigned to the missile defense interceptors. Israeli officials declined to specify the number of interceptors on hand to reload their missile-defense batteries.

Before the conflict began, Hamas was estimated to have amassed an arsenal of 10,000 to 12,000 rockets. Israeli officials say their pre-emptive strikes on Hamas rocket depots severely reduced the arsenal of missiles, both those provided by Iran and some built in Gaza on a Syrian design.

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The Shrewd Shopper Carries a Smartphone

Tim Gruber for The New York Times

From left, Tara Niebeling, Sarah Schmidt, Bridget Jewell and Erin Vande Steeg are members of the social media team at the Mall of America in Bloomington, Minn.

Retailers are trying to lure shoppers away from the Internet, where they have increasingly been shopping to avoid Black Friday madness, and back to the stores. The bait is technological tools that will make shopping on the busiest day of the year a little more sane — and give shoppers an edge over their competition.

Those with smartphones in hand will get better planning tools, prices and parking spots. Walmart has a map that shows shoppers exactly where the top Black Friday specials can be found. A Mall of America Twitter feed gives advice on traffic and gifts, and the Macy’s app sends special deals for every five minutes a shopper stays in a store.

“The crazy mad rush to camp out and the crazy mad rush to hit the doorbusters have really made people think, ‘I’m just going to stay home on Black Friday,’ ” said Carey Rossi, editor in chief of ConsumerSearch.com, a review site. “This is going to invite some people back and say, ‘You know what? It doesn’t have to be that crazy.’ ”

Part of the retailers’ strategy is to slap back at online stores like Amazon.com, which last year used apps to pick off shoppers as they browsed in physical stores. But the stores are also recognizing that shopping on the Friday after Thanksgiving need not require an overnight wait in line, a helmet and elbow pads. A smartphone gives shoppers enough of an edge.

“This takes away that frantic Black Friday anxiety,” said Lawrence Fong, co-founder of BuyVia, an app that sends people price alerts and promotions. “While there’s a sport to it, life’s a little too short.”

Denise Fouts, 45, who works repairing fire and water damage in Chandler, Ariz., was already using apps, including Shopkick, Target’s app and one called Black Friday, before Thanksgiving to prepare for Black Friday. “There still are going to be the crowds, but at least I already know ahead of time what I’m going specifically for,” Ms. Fouts said.

Last week, Macy’s released an update to its app with about 300 Black Friday specials and their location. In the Herald Square store, for instance, the $49.99 cashmere sweater specials will be in the Broadway side of the fifth-floor women’s department.

“With the speed that people are shopping with on Black Friday, they need to be really efficient about how they’re spending their time,” said Jennifer Kasper, group vice president for digital media at Macy’s.

When shoppers keep the app open, Macy’s will start sending special deals to the phone every five minutes. The deals are not advertised elsewhere.

Walmart has had an app for several years, but recently introduced an in-store mode, which shows things like the current circular or food tastings when a shopper is near a certain location. Twelve percent of Walmart’s mobile revenue now comes from when a person is inside a store.

For Black Friday, the app will have a map of each store, with the precise location of the top sale items — so planners can determine the best way to run. “The blitz items are not where you think they would be, because for traffic reasons, maybe the hot game console is in the lawn and garden center,” said Gibu Thomas, senior vice president for mobile and digital for Walmart Global eCommerce.

Target is also testing a way-finding feature on its app at stores that include some in Seattle, Chicago and Los Angeles. If a shopper types in an item, the app will give its location.

Other app makers are betting that shoppers want apps that pull in information from many stores.

RedLaser, an eBay app, lets shoppers use their phones to compare prices and recently started using location data to give shoppers personalized promotions when they walk into stores, including items not on store shelves at Best Buy, for instance. RetailMeNot, which offers e-commerce coupons, now has offline coupons that will pop up on users’ cellphones when they step near 500 malls on Black Friday.

“Consumers are not going to download 40 different apps for 40 different stores,” said Cyriac Roeding, co-founder of Shopkick, a location-based app that gives shoppers points, redeemable for perks, when they walk into stores or scan certain items.

For Black Friday, Shopkick is publishing what it calls a little black book with the top doorbusters. Shoppers will earn extra points and rewards for shopping on Black Friday.

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