Sign Language Researchers Broaden Science Lexicon

Imagine trying to learn biology without ever using the word “organism.” Or studying to become a botanist when the only way of referring to photosynthesis is to spell the word out, letter by painstaking letter.

For deaf students, this game of scientific Password has long been the daily classroom and laboratory experience. Words like “organism” and “photosynthesis” — to say nothing of more obscure and harder-to-spell terms — have no single widely accepted equivalent in sign language. This means that deaf students and their teachers and interpreters must improvise, making it that much harder for the students to excel in science and pursue careers in it.

“Often times, it would involve a lot of finger-spelling and a lot of improvisation,” said Matthew Schwerin, a physicist with the Food and Drug Administration who is deaf, of his years in school. “For the majority of scientific terms,” Mr. Schwerin and his interpreter for the day would “try to find a correct sign for the term, and if nothing was pre-existing, we would come up with a sign that was agreeable with both parties.”

Now thanks to the Internet — particularly the boom in online video — resources for deaf students seeking science-related signs are easier to find and share. Crowdsourcing projects in both American Sign Language and British Sign Language are under way at several universities, enabling people who are deaf to coalesce around signs for commonly used terms.

This year, one of those resources, the Scottish Sensory Centre’s British Sign Language Glossary Project, added 116 new signs for physics and engineering terms, including signs for “light-year,”  (hold one hand up and spread the fingers downward for “light,” then bring both hands together in front of your chest and slowly move them apart for “year”), “mass” and “X-ray” (form an X with your index fingers, then, with the index finger on the right hand, point outward). 

The signs were developed by a team of researchers at the center, a division of the University of Edinburgh in Scotland that develops learning tools for students with visual and auditory impairments. The researchers spent more than a year soliciting ideas from deaf science workers, circulating lists of potential signs and ultimately gathering for “an intense weekend” of final voting, said Audrey Cameron, science adviser for the project. (Dr. Cameron is also deaf, and like all non-hearing people interviewed for this article, answered questions via e-mail.)

Whether the Scottish Sensory Centre’s signs will take hold among its audience remains to be seen. “Some will be adopted, and some will probably never be accepted,” Dr. Cameron said. “We’ll have to wait and see what happens.”

Ideally, the standardization of signs will make it easier for deaf students to keep pace with their hearing classmates during lectures. “I can only choose to look at one thing at a time,” said Mr. Schwerin of the F.D.A., recalling his science education, “and it often meant choosing between the interpreter, the blackboard/screen/material, or taking notes. It was like, pick one, and lose out on the others.”

The problem doesn’t end at graduation. In fact, it only intensifies as new discoveries add unfamiliar terms to the scientific lexicon. “I’ve had numerous meetings where I couldn’t participate properly because the interpreters were not able to understand the jargon and they did not know any scientific signs,” Dr. Cameron said.

One general complaint about efforts to standardize signs for technical terms is the idea that, much like spoken language, sign language should be allowed to develop organically rather than be dictated from above.

“Signs that are developed naturally — i.e., that are tested and refined in everyday conversation — are more likely to be accepted quickly by the community,” said Derek Braun, director of the molecular genetics laboratory at Gallaudet University in Washington, D.C., which he said was the first biological laboratory designed and administered by deaf scientists.

This article has been revised to reflect the following correction:

Correction: December 4, 2012

An earlier version of this article misstated the origin of the ASL-STEM Forum.  It was developed by researchers at the University of Washington, not Gallaudet University.  Researchers at Gallaudet and the National Technical Institute for the Deaf at Rochester Institute of Technology work with the University of Washington to provide content and help the forum grow.

This article has been revised to reflect the following correction:

Correction: December 4, 2012

An earlier version of a correction with this article misstated the name of an institute that works on the ASL-STEM Forum. It is the National Technical Institute for the Deaf at Rochester Institute of Technology not the National Institute for the Deaf. 

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Free-Messaging Apps Siphon Profits from Cellular Providers

For a long time, opening a cellphone bill was scary for the parents of teenagers. Charges for texting could reach hundreds of dollars a month, prompting many families to sign up for unlimited plans. But at perhaps $20 a month for each family member, that quickly added up, too.

Lucas Jackson/Reuters

A man uses his Apple iPhone in New York in September. Cellphone users are sending more text messages than ever, but increasingly they are free — thanks to the Internet.

Apps like Facebook Messenger, top, and WhatsApp, bottom, send their messages using the Internet rather than cellular networks. The shift could cost wireless companies billions of dollars.

Relief is on the way. Cellphone users are sending more text messages than ever, but increasingly they are free — thanks to the Internet. While that is good news for consumers, it could cost the world’s wireless companies tens of billions of dollars in lost revenue.

Standard texting, the kind where you send abbreviation-filled messages over a cellphone network, has been in decline in many parts of the world, and now appears to be shrinking in the United States. That is because smartphones can use free Internet-powered services that send messages over data networks instead, and those services are attracting millions of users.

The shift is opening an opportunity for big companies like Facebook and Apple and smaller start-ups like WhatsApp and Kik, which are making aggressive grabs at this market, aiming to put themselves at the center of how people communicate in the smartphone era.

Peter Deng, a product director at Facebook who oversees its Messenger software, said that text messaging was “ripe for innovation” because it had been held back by outdated technology.

“It’s limited to 160 characters,” Mr. Deng said, “and it’s not at all rich in its expression. People want to connect deeply with each other, and they don’t want to be constrained by various technical boundaries and decisions made 20 years ago.”

Unlike ordinary text messages, Facebook’s messaging service allows people to see when their friends are typing a reply and when messages are received, among other features, he said.

Standard texting is still popular. CTIA, the wireless industry trade group, said that in the first half of this year, Americans sent 1.107 trillion text messages. But that was down 2.6 percent from the 1.137 trillion messages sent in the first half of last year. Ovum, a mobile communications research firm, estimates that by 2016, Internet-based message services will have eaten up $54 billion in revenue that carriers could have made from text messaging.

For years, text messages have been a source of pure profit for carriers because it costs nearly nothing to deliver them. In response to the rise of Internet services, they have been overhauling their pricing plans to stay profitable.

Verizon Wireless and AT&T, for example, offer new plans that include unlimited texting and phone calls, while charging bigger fees for using Internet data, which is likely to be their main source of growth. (Internet messaging over a carrier’s data network does use up some of a customer’s monthly data allotment, but it is a tiny amount relative to, say, watching a video.)

John Walls, vice president for public affairs at CTIA, said carriers were always expanding their services by offering things like all-you-can-eat texting plans and the ability to donate to charity via text. He noted that 72,000 text messages were being sent every second of every day.

“I hardly think the end is in sight for texts,” Mr. Walls said.

For Internet companies, messaging will never be a cash cow. But they have other reasons to get excited about this market.

Facebook benefits if more people use its messaging service, because those people are likely to spend more time on its Web site and mobile apps, seeing more ads. On Tuesday the company said it would allow Android users in some countries to sign up for its messaging service with just a phone number, no Facebook account required, partly because this might eventually persuade non-Facebook users to cave in and sign up for an account. That feature will come to the United States at some point, Facebook said.

Apple’s free texting service, iMessage, comes installed on iPhones, iPads and iPod Touch devices, where it automatically routes messages over the Internet if they are being sent to another Apple device. The service also works with the Messages app on Apple’s computers. That could encourage people to continue buying Apple products to keep in touch with family and friends cheaply and easily. Even the design of iMessage makes people feel like they’re in a special clique: an iMessage shows up on an Apple device as a blue bubble, while a normal text message from a non-Apple phone is green.

Perhaps the most talked-about player in texting right now is the small start-up WhatsApp, based in Mountain View, Calif. The 30-person company, founded by Jan Koum and Brian Acton, two former Yahoo executives, says its service is used in more than 100 countries. Its app is one of the most popular in the world on iPhones and Android devices, and on the BlackBerry it is even bigger than Research in Motion’s own messaging service.

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Changing of the Guard: How Crash Cover-Up Altered China’s Succession

BEIJING — “Thank you. I’m well. Don’t worry,” read the post on a Chinese social networking site. The brief comment, published in June, appeared to come from Ling Gu, the 23-year-old son of a high-powered aide to China’s president, and it helped quash reports that he had been killed in a Ferrari crash after a night of partying.

It only later emerged that the message was a sham, posted by someone under Mr. Ling’s alias — almost three months after his death.

The ploy was one of many in a tangled effort to suppress news of the Ferrari crash that killed Mr. Ling and critically injured two young female passengers, one of whom later died. The outlines of the affair surfaced months ago, but it is now becoming clearer that the crash and the botched cover-up had more momentous consequences, altering the course of the Chinese Communist Party’s once-in-a-decade leadership succession last month.

China’s departing president, Hu Jintao, entered the summer in an apparently strong position after the disgrace of Bo Xilai, previously a rising member of a rival political network who was brought down when his wife was accused of murdering a British businessman. But Mr. Hu suffered a debilitating reversal of his own when party elders — led by his predecessor, Jiang Zemin — confronted him with allegations that Ling Jihua, his closest protégé and political fixer, had engineered the cover-up of his son’s death.

According to current and former officials, party elites, and others, the exposure helped tip the balance of difficult negotiations, hastening Mr. Hu’s decline; spurring the ascent of China’s new leader, Xi Jinping; and playing into the hands of Mr. Jiang, whose associates dominate the new seven-man leadership at the expense of candidates from Mr. Hu’s clique.

The case also shows how the profligate lifestyles of leaders’ relatives and friends can weigh heavily in backstage power tussles, especially as party skulduggery plays out under the intensifying glare of media.

Numerous party insiders provided information regarding the episode, speaking on the condition of anonymity for fear of reprisals from the authorities. Officials have investigated the aftermath of the car wreck, they say, including looking into accusations that a state oil company paid hush money to the families of the two women.

Under Mr. Hu, Mr. Ling had directed the leadership’s administrative center, the General Office, but was relegated to a less influential post in September, ahead of schedule. Last month, he failed to advance to the 25-person Politburo and lost his seat on the influential party secretariat.

Mr. Hu, who stepped down as party chief, immediately yielded his post as chairman of the military, meaning he will not retain power as Mr. Jiang did. “Hu was weakened even before leaving office,” said a midranking official in the Organization Department, the party’s personnel office.

Mr. Ling’s future remains unsettled, with party insiders saying that his case presents an early test of whether Mr. Xi intends to follow through on public promises to fight high-level corruption.

“He can decide whether to go after Ling Jihua or not,” said Wu Guoguang, a former top-level party speechwriter, now a political scientist at the University of Victoria in British Columbia. “Either way, this is a big card in Xi Jinping’s hand.”

Mr. Ling, 56, built his career in the Communist Youth League. At an early age, he secured the patronage of Mr. Hu, who led the Youth League in the early 1980s and brought Mr. Ling to the General Office in 1995. “Hu didn’t come with a lot of friends, but Ling was someone he knew he could trust,” said the Organization Department official. “Officials said that if Ling called, it was like Hu calling.”

Mr. Ling played a central role in moving Youth League veterans into high offices and undermining Mr. Hu’s adversaries. Mr. Ling also wielded leverage over Internet censorship of leaders’ affairs, and sought to use it to benefit his patron.

“Negative publicity, including untruths, about Xi Jinping were not suppressed the way publicity about Hu Jintao was,” said one associate of party leaders.

As his influence grew, Mr. Ling tried to keep a low profile. About a decade ago, his wife closed a software company she owned and formed a nonprofit foundation that incubates young entrepreneurs. The couple sent their son, Ling Gu, to an elite Beijing high school under an alias, Wang Ziyun. “Ling Jihua told his family not to damage his career,” a former Youth League colleague said. “But it seems it can’t be stopped.”

Still living under an alias, Ling Gu graduated from Peking University last year with an international relations degree and began graduate studies in education. One of his instructors said his performance plunged later in his undergraduate years. “I think there were too many lures, too much seduction,” he said.

Before dawn on March 18, a black Ferrari Spider speeding along Fourth Ring Road in Beijing ricocheted off a wall, struck a railing and cracked in two. Mr. Ling was killed instantly, and the two young Tibetan women with him were hospitalized with severe injuries. One died months later, and the other is recovering, party insiders said.

Ian Johnson and Edward Wong contributed reporting.

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Deficit Talks Stumble Over Down Payment

Alex Wong/Getty Images

Senator Kent Conrad in Washington last month. He sees “confusion between the initial down payment and the framework.”

WASHINGTON — For all the growing angst over the state of negotiations to head off a fiscal crisis in January, the parties are farthest apart on a relatively small part of the overall deficit reduction program — the down payment.

President Obama and the House speaker, John A. Boehner, are in general agreement that the relevant Congressional committees must sit down next year and work out changes to the tax code and entitlement programs to save well more than $1 trillion over the next decade.

But before that work begins, both men want Congress to approve a first installment on deficit reduction in the coming weeks. The installment would replace the automatic spending cuts and tax increases that make up the “fiscal cliff,” while signaling Washington’s seriousness about getting its fiscal house in order. That is where the chasm lies in size and scope.

Mr. Obama says the down payment should be large and made up almost completely of tax increases on top incomes, partly because he and Congressional leaders last year agreed on some spending cuts over the next decade but have yet to agree on any tax increases.

Republicans have countered by arguing for a smaller down payment that must include immediate savings from Medicare and other social programs. Republicans, using almost mirror-image language, have said that they do not want to agree to specific tax increases and vague promises of future spending cuts.

Senator Kent Conrad of North Dakota, chairman of the Budget Committee and part of a bipartisan “Gang of Six” senators who devised the two-stage process, said: “I think there’s a lot of confusion between the initial down payment and the framework. That’s for sure.”

The two biggest areas of dispute are tax increases and the big government health insurance programs, Medicare and Medicaid. On the health programs, neither side believes Congress could meaningfully overhaul them in the four weeks that remain before the fiscal deadline.

“Entitlement reform is a big step, and it affects tens of millions of people,” said Senator Richard J. Durbin, Democrat of Illinois, another architect of the two-stage framework. “It’s not just a matter of cutting spending in an appropriation. It’s changing policy. And that’s why I was reluctant to include it in the down-payment conversation. I want this to be a thoughtful effort on both sides that doesn’t jeopardize this program.”

But Republicans say that it is possible to make some initial changes to the programs in coming weeks. “There are simpler things that can be done,” said Senator Michael D. Crapo, Republican of Idaho and another Gang of Six member. “The real structural changes would come later.”

Mr. Crapo said Congress could agree on some additional cuts to health care providers and change the way inflation is calculated to slow not only automatic increases in Medicare and Social Security benefits, but also the annual rise in tax brackets.

Democrats instead argue that the down payment should consist of a combination of tax increases and cuts to programs outside Medicare, Medicaid and Social Security, like farm programs. Mr. Obama has pushed for a return to the top tax rates under President Bill Clinton.

Republican leaders have said that they are willing to raise new tax revenues — albeit not as much as Democrats want — but Republicans want taxes to rise by closing loopholes and curbing tax deductions and credits.

If the two sides are able to come to an agreement on the down payment, it would also likely fix targets for larger savings in the tax code and entitlement programs. The White House and Congress would then spend much of the next year trying to hash out the specific policy changes needed to hit those targets.

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Global Update: GlaxoSmithKline Tops Access to Medicines Index

Sang Tan/Associated Press

GlaxoSmithKline hung on to its perennial top spot in the new Access to Medicines Index released last week, but its competitors are closing in.

Every two years, the index ranks the world’s top 20 pharmaceutical companies based on how readily they get medicines they hold patents on to the world’s poor, how much research they do on tropical diseases, how ethically they conduct clinical trials in poor countries, and similar issues.

Johnson & Johnson shot up to second place, while AstraZeneca fell to 16th from 7th. AstraZeneca has had major management shake-ups. It did not do less, but the industry is improving so rapidly that others outscored it, the report said.

The index was greeted with skepticism by some drugmakers when it was introduced in 2008. But now 19 of the 20 companies have a board member or subcommittee tracking how well they do at what the index measures, said David Sampson, the chief author.

The one exception was a Japanese company. As before, Japanese drugmakers ranked at or near the index’s bottom, and European companies clustered near the top. Generic companies — most of them Indian — that export to poor countries are ranked separately.

Johnson & Johnson moved up because it created an access team, disclosed more and bought Crucell, a vaccine company.

The foundation that creates the index now has enough money to continue for five more years, said its founder, Wim Leereveld, a former pharmaceutical executive.

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Global Update: GlaxoSmithKline Tops Access to Medicines Index

Sang Tan/Associated Press

GlaxoSmithKline hung on to its perennial top spot in the new Access to Medicines Index released last week, but its competitors are closing in.

Every two years, the index ranks the world’s top 20 pharmaceutical companies based on how readily they get medicines they hold patents on to the world’s poor, how much research they do on tropical diseases, how ethically they conduct clinical trials in poor countries, and similar issues.

Johnson & Johnson shot up to second place, while AstraZeneca fell to 16th from 7th. AstraZeneca has had major management shake-ups. It did not do less, but the industry is improving so rapidly that others outscored it, the report said.

The index was greeted with skepticism by some drugmakers when it was introduced in 2008. But now 19 of the 20 companies have a board member or subcommittee tracking how well they do at what the index measures, said David Sampson, the chief author.

The one exception was a Japanese company. As before, Japanese drugmakers ranked at or near the index’s bottom, and European companies clustered near the top. Generic companies — most of them Indian — that export to poor countries are ranked separately.

Johnson & Johnson moved up because it created an access team, disclosed more and bought Crucell, a vaccine company.

The foundation that creates the index now has enough money to continue for five more years, said its founder, Wim Leereveld, a former pharmaceutical executive.

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Court Cases Challenge Border Searches of Laptops and Phones

The government has historically had broad power to search travelers and their property at the border. But that prerogative is being challenged as more people travel with extensive personal and business information on devices that would typically require a warrant to examine.

Several court cases seek to limit the ability of border agents to search, copy and even seize travelers’ laptops, cameras and phones without suspicion of illegal activity.

“What we are asking is for a court to rule that the government must have a good reason to believe that someone has engaged in wrongdoing before it is allowed to go through their electronic devices,” said Catherine Crump, a lawyer for the American Civil Liberties Union who is representing plaintiffs in two lawsuits challenging digital border searches.

A decision in one of those suits, Abidor v. Napolitano, is expected soon, according to the case manager for Judge Edward R. Korman, who is writing the opinion for the Federal District Court for the Eastern District of New York.

In that case, Pascal Abidor, who is studying for his doctorate in Islamic studies, sued the government after he was handcuffed and detained at the border during an Amtrak trip from Montreal to New York. He was questioned and placed in a cell for several hours. His laptop was searched and kept for 11 days.

According to government data, these types of searches are rare: about 36,000 people are referred to secondary screening by United States Customs and Border Protection daily, and roughly a dozen of those travelers are subject to a search of their electronic devices.

Courts have long held that Fourth Amendment protections against unreasonable searches do not apply at the border, based on the government’s interest in combating crime and terrorism. But Mr. Pascal’s lawsuit and similar cases question whether confiscating a laptop for days or weeks and analyzing its data at another site goes beyond the typical border searches. They also depart from the justification used in other digital searches, possession of child pornography.

“We’re getting more into whether this is targeting political speech,” Ms. Crump said.

In another case the A.C.L.U. is arguing, House v. Napolitano, border officials at Chicago O’Hare Airport confiscated a laptop, camera and USB drive belonging to David House, a computer programmer, and kept his devices for seven weeks.

The lawsuit charges that Mr. House was singled out because of his association with the Bradley Manning Support Network. Pfc. Bradley Manning is a former military intelligence analyst accused of leaking thousands of military and diplomatic documents to the antisecrecy group WikiLeaks.

In March, Judge Denise J. Casper of Federal District Court in Massachusetts denied the government’s motion to dismiss the suit, saying that although the government did not need reasonable suspicion to search someone’s laptop at the border, that power did not strip Mr. House of his First Amendment rights. Legal scholars say this ruling could set the stage for the courts to place some limits on how the government conducts digital searches.

“The District Court basically said you don’t need individualized suspicion to search an electronic device at the border,” said Patrick E. Corbett, a professor of criminal law and procedure at Thomas M. Cooley Law School in Lansing, Mich. “What they were troubled with was the fact that the government held these devices for 49 days.”

Customs and Border Protection, part of the Department of Homeland Security, declined to discuss the policy in an interview, but a spokeswoman for the agency said in an e-mail: “Keeping Americans safe and enforcing our nation’s laws in an increasingly digital world depends on our ability to lawfully screen all materials — electronic or otherwise — entering the United States. We are committed to ensuring the rights and privacies of all people while making certain that D.H.S. can take the lawful actions necessary to secure our borders.”

The statement also referred to the agency’s policy on border searches of electronic devices, which says that officers can keep these devices for a “reasonable period of time,” including at an off-site location, and seek help from other government agencies to decrypt, translate or interpret the information they contain. If travelers choose not to share a password for a device, the government may hold it to find a way to gain access to the data.

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Larissa Journal: Greek Brothel Owner Rescues Larissa Soccer Club

Angelos Tzortzinis for The New York Times

Ms. Alevridou's support of Voukefalas has caused an uproar.

LARISSA, Greece — Her soccer club looked ragged. Strikers jumped up for headers only to miss the ball entirely. Players tumbled over one another, shouting out accusations that they had been fouled.

But in the bleachers, Soula Alevridou, or “Madam Soula,” as she is known in these parts, watched intently, a petite woman in a man’s tie smoking ultra thin cigarettes.

“Keep in mind that the home team is very good,” she said, explaining the difficulties that her team, Voukefalas, was having.

Madam Soula, a former prostitute and now, at the age of 67, the owner of two luxury brothels here in Larissa, stepped in this fall to sponsor Voukefalas, a small amateur soccer team that like many others in Greece was having trouble coming up with the cash for uniforms, equipment and playing field fees.

She considers her support a natural thing to do, maybe even a patriotic gesture, because her debt-mired country is in so much trouble that many of life’s extras, like amateur sports, are becoming out of reach.

“A friend asked and I said, ‘I am here,’ ” she said.

But local officials in this once-rich farming area are hardly thanking her for her efforts. In fact, her gift of about $1,300 so far, in part to buy bubble-gum pink training outfits — has caused something of an uproar as officials debate the appropriateness of having a brothel owner step in, even if it is to make up for a bankrupt state and an economy that leaves few businesses with the cash to help young men play sports.

In an interview, Larissa’s mayor, Konstantinos Tzanakoulis, pointedly ignored questions about the matter. And the Larissa soccer league recently informed Voukefalas that team equipment bearing the name of Madam Soula’s brothels — Villa Erotica and House of the Era — would not be tolerated, though brothels are legal in Greece. The league warned that any infraction, not only in games but also during “training, warm-ups, interviews and friendly matches,” would land the team in disciplinary hearings for “defamation of the sport.”

The team’s president, Ioannis Batziolas, 29, a backup goalie, calls the league’s decision hypocritical, and points out that Greece’s professional soccer championship is sponsored by the state-owned lottery and betting company OPAP, which is soon to be privatized. “What is the better idea to promote?” he asks. “Gambling or sex?”

For a time, this city of 200,000 at the foot of Mount Olympus seemed to be weathering the Greek crisis better than most. But the years of recession are piling up and most businesses are suffering. Unemployment is over 20 percent, higher among young people.

Madam Soula said her business had been hurt, too. But not that much. Customers sometimes even fly in from Britain, she said, drawn by Internet ads.

Mr. Batziolas said he looked everywhere for team sponsors, but found nothing until Madam Soula came forward. His own travel agency, L.A. Travel, provided most of the money last year. But it just could not afford to any longer, he said. On top of that, he has not seen the government’s share of support in several years. “They owe me thousands,” he said.

Mr. Tzanakoulis, who has been mayor here for more than a decade, says that the municipality is continuing to support sports, but that the central government has not been delivering, which leaves a great need.

“Sports are important for young men,” he said. “It is a good activity that keeps them out of trouble.” But that is all he will say on the subject of Voukefalas (the team is named after Alexander the Great’s horse) and the team’s new sponsor.

Voukefalas is not the only team to have been creative in looking for sponsors. Another soccer team got a funeral home to act as a sponsor and for a while wore black T-shirts with white crosses. But league officials did not like that either.

Madam Soula tries to shrug off the hullabaloo over her sponsorship. “Do they have anyone else to give them the money?” she asks.

Dimitris Bounias contributed reporting.

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Disruptions: Silencing the Voices of Militants on Twitter

Twitter, perhaps more than any other social media outlet, has become one of the most powerful tools to promote democracy in the Middle East.

The service, which helped Arab Spring protesters in their drive for a new order in the region, is now under attack over aiding and abetting terrorist organizations.

Along with six other Republican lawmakers, Representative Ted Poe, a judge turned Texas Congressman, sent a letter to the F.B.I., demanding that Twitter ban two militant groups, Hamas and Hezbollah, that are on the State Department’s list of terrorist organizations. “Failure to block access arms them with the ability to freely spread their violent propaganda and mobilize in their war on Israel,” he said in a statement to news outlets, adding: “The F.B.I. and Twitter must recognize sooner rather than later that social media is a tool for the terrorists.”

The demand is based on laws saying that any person or group offering material support — contributing cash, weapons and other tangible aid, including “service” and “expert advice or assistance” — to terrorist organizations is essentially working with them.

But some might argue that running AK-47s and rocket launchers to terrorists, and using Twitter, which allows groups to post 140-character missives online, are two very different things.

In a phone interview, Mr. Poe was adamant that Twitter had a responsibility to take down the accounts. By having a voice on the site, he said, they “are amassing more followers and threatening the security of the United States.”

“We freeze terrorist organizations’ bank accounts, and we ought to freeze their Twitter accounts, too,” he said.

But civil liberties lawyers are wary of such actions. “The problem here is the process by which the government decides to classify a terrorist organization,” said Michael C. Dorf, a constitutional law professor at Cornell.

The material-support provision has been used to convict about 75 people in the United States, but it remains a contentious issue right up to the Supreme Court.

“The more immediate set of concerns is that not everything these groups do is terrorism, and there are people whose speech could be restricted by some of these laws,” Professor Dorf said, adding that people associated with Hamas who offer aid and education to Palestinians would be silenced, too. “So it’s hardly a slam dunk to say that the statute covers Twitter or Facebook.”

Although the letter to the F.B.I. was sent in September, the request gained more attention in recent weeks as fighting escalated in Gaza. After Israel killed Hamas’s top military commander, Hamas unleashed an increased barrage of missiles. Both Hamas and a press officer for the Israel Defense Forces posted to Twitter to describe the strike as it unfolded.

Israel has also used other social networks: it has shared videos on YouTube, updated its Facebook status to say which members of Hamas it had killed, and in the most bizarre move, created mood boards on Pinterest to show off its troops and weapons. Banning Hamas or Hezbollah on Twitter could set a broad precedent.

For civil libertarians, any move to remove Hamas and Hezbollah from Twitter raises concerns.

“I think it’s as contrary to the First Amendment as openness is the enemy to extremism and fundamentalism,” said Jonathan Zittrain, a professor at Harvard Law School and a founder of the Berkman Center for Internet and Society. “The F.B.I. is going to learn more about Hamas and any organizations, by having them operate in an open environment, than if its voice is driven to proxies and underground backchannels, which would inevitably happen immediately.”

Hamas and other groups don’t fall under the Constitution of the United States. for many of the countries in the Middle East, Twitter is the closest thing to a democracy that gives people a voice, even if it’s one that we don’t always agree with.

E-mail: bilton@nytimes.com

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Call That Kept Nursing Home Patients in Sandy’s Path

Chang W. Lee/The New York Times

Workers were shocked that nursing and adult homes in areas like Rockaway Park, Queens, weren’t evacuated.

Hurricane Sandy was swirling northward, four days before landfall, and at the Sea Crest Health Care Center, a nursing home overlooking the Coney Island Boardwalk in Brooklyn, workers were gathering medicines and other supplies as they prepared to evacuate.

Then the call came from health officials: Mayor Michael R. Bloomberg, acting on the advice of his aides and those of Gov. Andrew M. Cuomo, recommended that nursing homes and adult homes stay put. The 305 residents would ride out the storm.

The same advisory also took administrators by surprise at the Ocean Promenade nursing home, which faces the Atlantic Ocean in Queens. They canceled plans to move 105 residents to safety.

“No one gets why we weren’t evacuated,” said a worker there, Yisroel Tabi. “We wouldn’t have exposed ourselves to dealing with that situation.”

The recommendation that thousands of elderly, disabled and mentally ill residents remain in more than 40 nursing homes and adult homes in flood-prone areas of New York City had calamitous consequences.

At least 29 facilities in Queens and Brooklyn were severely flooded. Generators failed or were absent. Buildings were plunged into a cold, wet darkness, with no access to power, water, heat and food.

While no immediate deaths were reported, it took at least three days for the Fire Department, the National Guard and ambulance crews from around the country to rescue over 4,000 nursing home and 1,500 adult home residents. Without working elevators, many had to be carried down slippery stairwells.

“I was shocked,” said Greg Levow, who works for an ambulance service and helped rescue residents at Queens. “I couldn’t understand why they were there in the first place.”

Many sat for hours in ambulances and buses before being transported to safety through sand drifts and debris-filled floodwaters. They went to crowded shelters and nursing homes as far away as Albany, where for days, they often lacked medical charts and medications. Families struggled to locate relatives.

The decision not to empty the nursing homes and adult homes in the mandatory evacuation area was one of the most questionable by the authorities during Hurricane Sandy. And an investigation by The New York Times found that the impact was worsened by missteps that officials made in not ensuring that these facilities could protect residents.

They did not require that nursing homes maintain backup generators that could withstand flooding. They did not ensure that health care administrators could adequately communicate with government agencies during and after a storm. And they discounted the more severe of the early predictions about Hurricane Sandy’s surge.

The Times’s investigation was based on interviews with officials, health care administrators, doctors, nurses, ambulance medics, residents, family members and disaster experts. It included a review of internal State Health Department status reports. The findings revealed the striking vulnerability of the city’s nursing and adult homes.

On Sunday, Oct. 28, the day before Hurricane Sandy arrived, Mr. Bloomberg ordered a mandatory evacuation in Zone A, the low-lying neighborhoods of the city. But by that point, Mr. Bloomberg, relying on the advice of the city and state health commissioners, had already determined that people in nursing homes and adult homes should not leave, officials said.

The mayor’s recommendations that health care facilities not evacuate startled residents of Surf Manor adult home in Coney Island, said one of them, Norman Bloomfield. He recalled that another resident exclaimed, “What about us! Why’s he telling us to stay?”

The commissioners made the recommendation to Mr. Bloomberg and Mr. Cuomo because they said they believed that the inherent risks of transporting the residents outweighed the potential dangers from the storm.

In interviews, senior Bloomberg and Cuomo aides did not express regret for keeping the residents in place.

“I would defend all the decisions and the actions” by the health authorities involving the storm, said Linda I. Gibbs, a deputy mayor. “I feel like I’m describing something that was a remarkable, lifesaving event.”

Dr. Nirav R. Shah, the state health commissioner, who regulates nursing homes, said: “I’m not even thinking of second-guessing the decisions.”

Still, officials in New Jersey and in Nassau County adopted a different policy, evacuating nursing homes in coastal areas well before the storm.

Contradictory Forecasts

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