Unboxed: Big Data Is Great, but Don’t Forget Intuition

Andrew McAfee, principal research scientist at the M.I.T. Center for Digital Business, led off the conference by saying that Big Data would be “the next big chapter of our business history.” Next on stage was Erik Brynjolfsson, a professor and director of the M.I.T. center and a co-author of the article with Dr. McAfee. Big Data, said Professor Brynjolfsson, will “replace ideas, paradigms, organizations and ways of thinking about the world.”

These drumroll claims rest on the premise that data like Web-browsing trails, sensor signals, GPS tracking, and social network messages will open the door to measuring and monitoring people and machines as never before. And by setting clever computer algorithms loose on the data troves, you can predict behavior of all kinds: shopping, dating and voting, for example.

The results, according to technologists and business executives, will be a smarter world, with more efficient companies, better-served consumers and superior decisions guided by data and analysis.

I’ve written about what is now being called Big Data a fair bit over the years, and I think it’s a powerful tool and an unstoppable trend. But a year-end column, I thought, might be a time for reflection, questions and qualms about this technology.

The quest to draw useful insights from business measurements is nothing new. Big Data is a descendant of Frederick Winslow Taylor’s “scientific management” of more than a century ago. Taylor’s instrument of measurement was the stopwatch, timing and monitoring a worker’s every movement. Taylor and his acolytes used these time-and-motion studies to redesign work for maximum efficiency. The excesses of this approach would become satirical grist for Charlie Chaplin’s “Modern Times.” The enthusiasm for quantitative methods has waxed and waned ever since.

Big Data proponents point to the Internet for examples of triumphant data businesses, notably Google. But many of the Big Data techniques of math modeling, predictive algorithms and artificial intelligence software were first widely applied on Wall Street.

At the M.I.T. conference, a panel was asked to cite examples of big failures in Big Data. No one could really think of any. Soon after, though, Roberto Rigobon could barely contain himself as he took to the stage. Mr. Rigobon, a professor at M.I.T.’s Sloan School of Management, said that the financial crisis certainly humbled the data hounds. “Hedge funds failed all over the world,” he said.

THE problem is that a math model, like a metaphor, is a simplification. This type of modeling came out of the sciences, where the behavior of particles in a fluid, for example, is predictable according to the laws of physics.

In so many Big Data applications, a math model attaches a crisp number to human behavior, interests and preferences. The peril of that approach, as in finance, was the subject of a recent book by Emanuel Derman, a former quant at Goldman Sachs and now a professor at Columbia University. Its title is “Models. Behaving. Badly.”

Claudia Perlich, chief scientist at Media6Degrees, an online ad-targeting start-up in New York, puts the problem this way: “You can fool yourself with data like you can’t with anything else. I fear a Big Data bubble.”

The bubble that concerns Ms. Perlich is not so much a surge of investment, with new companies forming and then failing in large numbers. That’s capitalism, she says. She is worried about a rush of people calling themselves “data scientists,” doing poor work and giving the field a bad name.

Indeed, Big Data does seem to be facing a work-force bottleneck.

“We can’t grow the skills fast enough,” says Ms. Perlich, who formerly worked for I.B.M. Watson Labs and is an adjunct professor at the Stern School of Business at New York University.

A report last year by the McKinsey Global Institute, the research arm of the consulting firm, projected that the United States needed 140,000 to 190,000 more workers with “deep analytical” expertise and 1.5 million more data-literate managers, whether retrained or hired.

Thomas H. Davenport, a visiting professor at the Harvard Business School, is writing a book called “Keeping Up With the Quants” to help managers cope with the Big Data challenge. A major part of managing Big Data projects, he says, is asking the right questions: How do you define the problem? What data do you need? Where does it come from? What are the assumptions behind the model that the data is fed into? How is the model different from reality?

Society might be well served if the model makers pondered the ethical dimensions of their work as well as studying the math, according to Rachel Schutt, a senior statistician at Google Research.

“Models do not just predict, but they can make things happen,” says Ms. Schutt, who taught a data science course this year at Columbia. “That’s not discussed generally in our field.”

Models can create what data scientists call a behavioral loop. A person feeds in data, which is collected by an algorithm that then presents the user with choices, thus steering behavior.

Consider Facebook. You put personal data on your Facebook page, and Facebook’s software tracks your clicks and your searches on the site. Then, algorithms sift through that data to present you with “friend” suggestions.

Understandably, the increasing use of software that microscopically tracks and monitors online behavior has raised privacy worries. Will Big Data usher in a digital surveillance state, mainly serving corporate interests?

Personally, my bigger concern is that the algorithms that are shaping my digital world are too simple-minded, rather than too smart. That was a theme of a book by Eli Pariser, titled “The Filter Bubble: What the Internet Is Hiding From You.”

It’s encouraging that thoughtful data scientists like Ms. Perlich and Ms. Schutt recognize the limits and shortcomings of the Big Data technology that they are building. Listening to the data is important, they say, but so is experience and intuition. After all, what is intuition at its best but large amounts of data of all kinds filtered through a human brain rather than a math model?

At the M.I.T. conference, Ms. Schutt was asked what makes a good data scientist. Obviously, she replied, the requirements include computer science and math skills, but you also want someone who has a deep, wide-ranging curiosity, is innovative and is guided by experience as well as data.

“I don’t worship the machine,” she said.

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Memphis Aims to Be a Friendlier Place for Cyclists

Lance Murphey for The New York Times

The Shelby Farms Greenline, which replaced a Memphis rail line.

MEMPHIS — John Jordan, a 64-year-old condo appraiser here, has been pedaling his cruiser bicycle around town nearly every day, tooling about at lunchtime or zipping to downtown appointments.

“It’s my cholesterol-lowering device,” said Mr. Jordan, clad in a leather vest and wearing a bright white beard. “The problem is, the city needs to educate motorists to not run over” the bicyclists.

Bike-friendly behavior has never come naturally to Memphis, which has long been among the country’s most perilous places for cyclists. In recent years, though, riders have taken to the streets like never before, spurred by a mayor who has worked to change the way residents think about commuting.

Mayor A. C. Wharton Jr., elected in 2009, assumed office a year after Bicycling magazine named Memphis one of the worst cities in America for cyclists, not the first time the city had received such a biking dishonor. But Mr. Wharton spied an opportunity.

In 2008, Memphis had a mile and a half of bike lanes. There are now about 50 miles of dedicated lanes, and about 160 miles when trails and shared roads are included. The bulk of the nearly $1 million investment came from stimulus money and other federal sources, and Shelby County, which includes Memphis, was recently awarded an additional $4.7 million for bike projects.

In June, federal officials awarded Memphis $15 million to turn part of the steel truss Harahan Bridge, which spans the Mississippi River, into a bike and pedestrian crossing. Scheduled to open in about two years, the $30 million project will link downtown Memphis with West Memphis, Ark.

“We need to make biking part of our DNA,” Mr. Wharton said. “I’m trying to build a city for the people who will be running it 5, 10, 15 years from now. And in a region known to some for rigid thinking, the receptivity has been remarkable.”

City planners are using bike lanes as an economic development tool, setting the stage for new stores and enhanced urban vibrancy, said Kyle Wagenschutz, the city’s bike-pedestrian coordinator, a position the mayor created.

“The cycling advocates have been vocal the past 10 years, but nothing ever happened,” Mr. Wagenschutz said. “It took a change of political will to catalyze the movement.”

Memphis, with a population of 650,000, is often cited among the unhealthiest, most crime-ridden and most auto-centric cities in the country. Investments in bicycling are being viewed here as a way to promote healthy habits, community bonds and greater environmental stewardship.

But as city leaders struggle with a sprawling landscape — Memphis covers about the same amount of land as Dallas, yet has half the population — their persistence has run up against another bedeviling factor: merchants and others who are disgruntled about the lanes.

A clash between merchants and bike advocates flared last year after the mayor announced new bike lanes on Madison Avenue, a commercial artery, that would remove two traffic lanes. Many merchants, like Eric Vernon, who runs the Bar-B-Q Shop, feared that removing car lanes would hurt businesses and cause parking confusion. Mr. Vernon said that sales had not fallen significantly since the bike lanes were installed, but that he thought merchants were left out of the process.

On McLean Boulevard, a narrow residential strip where roadside parking was replaced by bike paths, homeowners cried foul. The city reached a compromise with residents in which parking was outlawed during the day but permitted at night, when fewer cyclists were out. Mr. Wagenschutz called the nocturnal arrangement a “Cinderella lane.”

Some residents, however, were not mollified. “I’m not against bike lanes, but we’re isolated because there’s no place to park,” said Carey Potter, 53, a longtime resident who started a petition to reinstate full-time parking.

The changes have been panned by some members of the City Council. Councilman Jim Strickland went as far as to say that the bike signs that dot the streets add “to the blight of our city.”

Tensions aside, the mayor’s office says that the potential economic ripple effect of bike lanes is proof that they are a sound investment.

A study in 2011 by the University of Massachusetts found that building bike lanes created more jobs — about 11 per $1 million spent — than any other type of road project. Several bike shops here have expanded to accommodate new cyclists, including Midtown Bike Company, which recently moved to a location three times the size of its former one. “The new lanes have been great for business,” said the manager, Daniel Duckworth.

Wanda Rushing, a professor at the University of Memphis and an expert on urban change in the South, said bike improvements were of a piece with a development model sweeping the region: bolstering transportation infrastructure and population density in the inner city.

“Memphis is not alone in acknowledging that sprawl is not sustainable,” Dr. Rushing said. “Economic necessity is a pretty good melding substance.”

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Despite Vows For Safety, Walmart Seen as Obstacle to Change

Abir Abdullah/European Pressphoto Agency

Several of Walmart's suppliers had used the factory in Bangladesh where 112 workers died last month.  More Photos »

When Walmart’s chief executive, Michael Duke, appeared at a Council on Foreign Relations meeting in New York this month, a raucous crowd of protesters awaited him. Walmart was confronting reports of bribery in Mexico, a wave of labor demonstrations in the United States and, perhaps most critically, questions about a grisly fire that had killed 112 workers at a Bangladeshi garment factory used by several Walmart suppliers.

“We will not buy from an unsafe factory,” Mr. Duke told the audience. “If a factory is not going to operate with high standards, then we would not purchase from that factory.”

But Mr. Duke’s reassurances that Walmart enforces high standards in the global clothing industry appear to be contradicted by inspection reports it requested and some of Walmart’s own internal communications:

¶ Just two weeks before Mr. Duke’s vow, a top Walmart executive acknowledged in an e-mail to a group of retailers that the industry’s safety monitoring system was seriously flawed. “Fire and electrical safety aspects are not currently adequately covered in ethical sourcing audits,” Rajan Kamalanathan, the executive, wrote to other board members of the Global Social Compliance Program, a business-led group focused on improving the supply chain.

¶ Three inspection reports from 2011 and 2012 at the Tazreen Fashions factory where the fire occurred revealed serious repeated violations, including a lack of fire alarms in many areas, a shortage of fire extinguishers and obstacles blocking workers’ escape routes. At the same time, those inspections did not even cover whether the factory had fire-safe emergency exits, leaving that responsibility to often lax government inspectors.

¶ Walmart led an effort to block a plan to have global retailers underwrite safety improvements at factories in Bangladesh, according to minutes of an April 2011 meeting as well as several participants.

Walmart has become the world’s largest retailer by demanding the lowest costs from suppliers and delivering the lowest prices to consumers — while promising its customers that the billions of dollars of goods it buys from Bangladesh, China and other countries are produced in safe, nonsweatshop factories. Walmart buys more than $1 billion in garments from Bangladesh each year, attracted by the country’s $37-a-month minimum wage, the lowest in the world.

But even as the deadly Nov. 24 fire at the Tazreen factory has stirred soul-searching inside and outside the apparel industry about the effectiveness of its global factory monitoring system, some nonprofit groups say Walmart has been an important obstacle to efforts to upgrade fire safety. That is partly because it has shown little interest in changing the existing practice of demanding that the factories, often operating at razor-thin margins, meet fire safety standards at their own cost.

“They are squeezing the manufacturers, and the manufacturers are happy to get away with the minimum compliance that they can,” said Farooq Sobhan, a former Bangladeshi diplomat involved in past negotiations between Bangladesh and the United States on trade policy for apparel. “It is kind of a vicious cycle.”

Walmart says it is doing everything it can to prevent factory fires. “Walmart has been advocating for improved fire safety with the Bangladeshi government, with industry groups and with suppliers,” Kevin Gardner, a Walmart spokesman, said in an e-mail. “We firmly believe factory owners must meet our supplier standards, and we recognize the cost of meeting those standards will be part of the cost of the goods we buy. We know our customers expect this of us and our suppliers.”

Walmart also insists that several of its apparel suppliers were using the Tazreen factory without its approval. Two days after the Tazreen fire, Walmart said it had “de-authorized” use of the factory, but without saying when or why; two weeks later it said it had taken the action “many months ago.”

But critics say that the inspection reports discovered in the Tazreen factory— which were obtained by The New York Times from a labor advocacy group — underscore fundamental problems with Walmart’s supply chain in Bangladesh, allowing it to avoid addressing safety problems it should have dealt with.

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Makers of $99 Android-Powered Game Console Ship First 1,200 ‘Ouyas’

Like Nintendo’s Wii U game console, the Ouya (that’s “OOH-yuh”) has an unusual name and even more unusual hardware. The console is roughly the size of a Rubik’s cube, and is powered by Android, Google‘s open-source operating system that’s normally found on smartphones and tablets.

Ouya’s makers, who are preparing the console for its commercial launch, encourage interested gamers to pop the case open and use it in electronics projects … or even to write their own games for it. Especially if they’re among the 1,200 who are about to receive their own clear plastic Ouya developer consoles.

Not exactly a finished product

The limited-edition consoles, which have been shipped out to developers already, are not designed for playing games on. They don’t even come with any.

Rather, the point of these consoles is so that interested Android developers can write games for the Ouya, which will then be released to gamers when the console launches to the public. Fans who pledged at least $ 1,337 to Ouya’s record-breaking Kickstarter project will get one, and while they’re not quite suited for playing games on — “we know the D-pad and triggers on the controller still need work,” Ouya’s makers say — the clear plastic developer consoles serve as a preview of what the finished product will look like, and a reminder of Ouya’s “openness.”

You keep using that word …

In the food and drug industries, terms like “organic” and “all-natural” are regulated so that only products which meet the criteria can have them on their labels. In the tech world, however, anyone can claim that their product is “open,” for whatever definition of “open” they like.

The term was popularized by the world’s rapid adoption of open-source software, like Android itself, where you’re legally entitled to a copy of the programming code and can normally use it in your own projects (like Ouya’s makers did). But when tech companies say that something is “open,” they don’t necessarily mean that the code or the hardware schematics use an open-source license.

How Ouya is “open”

Ouya’s makers have released their ODK, or developer kit, under the same open-source license as Android itself. This allows aspiring game developers to practice their skills even without a developer console, and to improve the kit however they want. The hardware itself is currently a “closed” design, however, despite the clear plastic case. The makers have expressed enthusiasm for the idea of hardware hackers using it in projects, and have said, “We’ll even publish the hardware design if people want it,” but so far they haven’t done so.

What about the games?

The most relevant aspect of “openness” to normal gamers is that Ouya’s makers say “any developer can publish a game.” This model is unusual for the console world, where only select studios are allowed to publish their wares on (for instance) the PlayStation Network, but is more familiar to fans of the anything-goes Google Play store for Android. Several big-name Android developers — including console game titan Square-Enix — have already signed up to have their wares on the Ouya.

Preordered Ouya game consoles (the normal ones, not the developer edition) will ship in April. They will cost $ 99 once sales are opened to the general public.

Jared Spurbeck is an open-source software enthusiast, who uses an Android phone and an Ubuntu laptop PC. He has been writing about technology and electronics since 2008.
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NHL makes new offer; lockout enters critical stage

NEW YORK (AP) — The NHL's latest offer to the players' association was enough for the sides to make plans to meet this weekend.

Deputy commissioner Bill Daly said Friday the league presented its proposal Thursday. The sides haven't met in person since a second round of talks with a federal mediator broke down Dec. 13.

The NHL and the players' association are expected to talk via conference call on Saturday, and have tentative plans to meet Sunday in New York.

The league's comprehensive new offer, that is several hundred pages in length, was still being reviewed by the union Friday night. The players' association's executive board and negotiating committee went over the proposal during an internal conference call.

"We delivered to the union a new, comprehensive proposal for a successor CBA," Daly said in a statement Friday. "We are not prepared to discuss the details of our proposal at this time. We are hopeful that once the union's staff and negotiating committee have had an opportunity to thoroughly review and consider our new proposal, they will share it with the players. We want to be back on the ice as soon as possible."

The league would like to have a deal in place by Jan. 11, begin training camps the following day and start the regular season by Jan. 19.

The lockout has reached its 104th day, and the NHL said it doesn't want a season of less than 48 games. That means a deal would need to be reached mid-January.

A person familiar with key points of the offer told The Associated Press that the league proposed raising the limit of individual free-agent contracts to six years from five — seven years if a team re-signs its own player; raising the salary variance from one year to another to 10 percent, up from 5 percent; and one compliance buyout for the 2013-14 season that wouldn't count toward a team's salary cap but would be included in the overall players' share of income.

The person spoke on condition of anonymity because details of the new offer were not being discussed publicly.

The NHL maintained the deferred payment amount of $300 million it offered in its previous proposal, an increase from an earlier offer of $211 million. The initial $300 million offer was pulled off the table after negotiations broke off earlier this month.

The latest proposal is for 10 years, running through the 2021-22 season, with both sides having the right to opt out after eight years.

A conference call with the players' association's negotiating committee and its executive board was scheduled for Friday afternoon and was expected to last several hours.

The lockout has reached a critical stage, threatening to shut down a season for the second time in eight years. All games through Jan. 14, plus the Winter Classic and the All-Star game already have been called off. The next round of cuts could claim the entire schedule.

The NHL is the only North American professional sports league to cancel a season because of a labor dispute, losing the 2004-05 campaign to a lockout. A 48-game season was played in 1995 after a lockout stretched into January.

It is still possible this dispute could eventually be settled in the courts if the sides can't reach a deal on their own.

The NHL filed a class-action suit this month in U.S. District Court in New York in an effort to show its lockout is legal. In a separate move, the league filed an unfair labor practice charge with the National Labor Relations Board, contending bad-faith bargaining by the union.

Those moves were made because the players' association took steps toward potentially filing a "disclaimer of interest," which would dissolve the union and make it a trade association. That would allow players to file antitrust lawsuits against the NHL.

Union members voted overwhelmingly to give their board the power to file the disclaimer by Jan. 2. If that deadline passes, another authorization vote could be held to approve a later filing.

Negotiations between the NHL and the union have been at a standstill since talks ended Dec. 6. One week later, the sides convened again with federal mediators in New Jersey, but still couldn't make progress.

The sides have been unable to reach agreement on the length of the new deal, the length of individual player contracts, and the variance in salary from year to year. The NHL is looking for an even split of revenues with players.

The NHL pulled all previous offers off the table after the union didn't agree to terms on its last proposal without negotiation.

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China Toughens Restrictions on Internet Use

How Hwee Young/European Pressphoto Agency

New measures by the Chinese government could chill some of the vibrant discourse on Twitter-like microblogs.

HONG KONG — The Chinese government issued new rules on Friday requiring Internet users to provide their real names to service providers, while assigning Internet companies greater responsibility for deleting forbidden postings and reporting them to the authorities.

The decision came as government censors have sharply stepped up restrictions on China’s international Internet traffic in recent weeks. The restrictions are making it harder for businesses to protect commercial secrets and for individuals to view overseas Web sites that the Chinese Communist Party deems politically sensitive.

The new regulations, issued by the Standing Committee of the National People’s Congress, allow Internet users to continue to adopt pseudonyms for their online postings, but only if they first provide their real names to service providers, a measure that could chill some of the vibrant discourse on the country’s Twitter-like microblogs. The authorities periodically detain and even jail Internet users for politically sensitive comments, such as calls for a multiparty democracy or accusations of impropriety by local officials.

Any entity providing Internet access, including over fixed-line or mobile phones, “should when signing agreements with users or confirming provision of services, demand that users provide true information about their identities,” the committee ordered.

In recent weeks, Internet users in China have exposed a series of sexual and financial scandals that have led to the resignations or dismissals of at least 10 local officials. International news media have also published a series of reports in recent months on the accumulation of wealth by the family members of China’s leaders, and some Web sites carrying such reports, including Bloomberg’s and the English- and Chinese-language sites of The New York Times, have been assiduously blocked, while Internet comments about them have been swiftly deleted.

The regulations issued Friday build on a series of similar administrative guidelines and municipal rules issued over the past year. China’s mostly private Internet service providers have been slow to comply with them, fearing the reactions of their customers. The committee’s decision has much greater legal force, and puts far more pressure on Chinese Internet providers to comply more quickly and more comprehensively, Internet specialists said.

In what appeared to be an effort to make the decision more palatable to the Chinese public, the committee also included a mandate for businesses in China to be more cautious in gathering and protecting electronic data.

“Nowadays on the Internet there are very serious problems with citizens’ personal electronic information being recklessly collected, used without approval, illegally disclosed, and even traded and sold,” Li Fei, a deputy director of the committee’s legislative affairs panel, said on Friday at a news conference in Beijing. “There are also a large number of cases of invasive attacks on information systems to steal personal electronic information, as well as lawbreaking on the Internet through swindles and through defaming and slandering others.”

Mr. Li denied that the government was seeking to prevent the exposure of corruption.

“When citizens exercise these rights according to the law, no organization or individual can use any reason or excuse to interfere, and cannot suppress them or exact revenge,” he said. “At the same time, when citizens exercise their rights, including through use of the Internet, they should stay within the bounds of the Constitution and the laws, and must not harm the legitimate rights and interests of the state, society, the collective or of other citizens.”

A spokesman for the National People’s Congress said that 145 members of the committee voted in favor of the new rules, with 5 abstaining and 1 voting against them.

The requirement for real names appeared to be aimed particularly at cellphone companies and other providers of mobile Internet access. At the news conference, an official from the Ministry of Industry and Information Technology, Zhao Zhiguo, said that nearly all fixed-line services now had real-name registration, but that only about 70 percent of mobile phones were registered under real names.

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Surgery Returns to NYU Langone Medical Center

Chang W. Lee/The New York Times

Senator Charles E. Schumer spoke at a news conference Thursday about the reopening of NYU Langone Medical Center.

NYU Langone Medical Center opened its doors to surgical patients on Thursday, almost two months after Hurricane Sandy overflowed the banks of the East River and forced the evacuation of hundreds of patients.

While the medical center had been treating many outpatients, it had farmed out surgery to other hospitals, which created scheduling problems that forced many patients to have their operations on nights and weekends, when staffing is traditionally low. Some patients and doctors had to postpone not just elective but also necessary operations for lack of space at other hospitals.

The medical center’s Tisch Hospital, its major hospital for inpatient services, between 30th and 34th Streets on First Avenue, had been closed since the hurricane knocked out power and forced the evacuation of more than 300 patients, some on sleds brought down darkened flights of stairs.

“I think it’s a little bit of a miracle on 34th Street that this happened so quickly,” Senator Charles E. Schumer of New York said Thursday.

Mr. Schumer credited the medical center’s leadership and esprit de corps, and also a tour of the damaged hospital on Nov. 9 by the administrator of the Federal Emergency Management Agency, W. Craig Fugate, whom he and others escorted through watery basement hallways.

“Every time I talk to Fugate there are a lot of questions, but one is, ‘How are you doing at NYU?’ ” the senator said.

The reopening of Tisch to surgery patients and associated services, like intensive care, some types of radiology and recovery room anesthesia, was part of a phased restoration that will continue. Besides providing an essential service, surgery is among the more lucrative of hospital services.

The hospital’s emergency department is expected to delay its reopening for about 11 months, in part to accommodate an expansion in capacity to 65,000 patient visits a year, from 43,000, said Dr. Andrew W. Brotman, its senior vice president and vice dean for clinical affairs and strategy.

In the meantime, NYU Langone is setting up an urgent care center with 31 bays and an observation unit, which will be able to treat some emergency patients. It will initially not accept ambulances, but might be able to later, Dr. Brotman said. Nearby Bellevue Hospital Center, which was also evacuated, opened its emergency department to noncritical injuries on Monday.

Labor and delivery, the cancer floor, epilepsy treatment and pediatrics and neurology beyond surgery are expected to open in mid-January, Langone officials said. While some radiology equipment, which was in the basement, has been restored, other equipment — including a Gamma Knife, a device using radiation to treat brain tumors — is not back.

The flooded basement is still being worked on, and electrical gear has temporarily been moved upstairs. Mr. Schumer, a Democrat, said that a $60 billion bill to pay for hurricane losses and recovery in New York and New Jersey was nearing a vote, and that he was optimistic it would pass in the Senate with bipartisan support. But the measure’s fate in the Republican-controlled House is far less certain.

The bill includes $1.2 billion for damage and lost revenue at NYU Langone, including some money from the National Institutes of Health to restore research projects. It would also cover Long Beach Medical Center in Nassau County, Bellevue, Coney Island Hospital and the Veterans Affairs hospital in Manhattan.

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Guangzhou Journal | Changing of the Guard: With Focus on Unity, China Looks to Nationalist Past

Shiho Fukada for The New York Times

Tourists at the Whampoa Military Academy, on Changzhou Island in Guangzhou.

GUANGZHOU, China — It was 1926, not long after the fall of the Qing dynasty, and much of China had been divided among warlords. In the south, leaders of the young Kuomintang mustered an army. At its head rode Chiang Kai-shek, who called to his side officers he had helped train, and together they marched north to take down the warlords, one by one.

The Northern Expedition was one of the first major tests for graduates of the Whampoa Military Academy, founded just two years earlier on quiet Changzhou Island, about 10 miles east of central Guangzhou, then known to the West as Canton. Mr. Chiang was the academy’s first commandant, appointed by Sun Yat-sen, the idealistic firebrand who wanted to build an army that would unite China.

The academy, now a collection of two-story white buildings near an active naval yard, stands as one of the most potent symbols of the nationalist movement led by Mr. Sun, which has strong contemporary echoes in the rallying cry that Xi Jinping made to his fellow Chinese after taking over in November as general secretary of the Communist Party.

Mr. Xi has spoken of a “great revival of the Chinese nation,” apparently to be accomplished through further opening the economy, tackling official corruption and building up the military. This month, on his first trip outside Beijing, Mr. Xi traveled to several cities here in Guangdong Province; the tour included visits with senior officers of the People’s Liberation Army and a photo opportunity on a naval destroyer. Though he did not visit the Whampoa academy, the message Mr. Xi was telegraphing was the same one Mr. Sun had relayed a century ago.

“When Sun Yat-sen founded the Whampoa academy, his goal was to unite China and to revive China as a nation, which is exactly the same mission that Secretary Xi is on,” said Zeng Qingliu, a historian with the Guangzhou Academy of Social Sciences who wrote a television script for a drama series on Whampoa. “Under that goal and that mission, Chinese people from all over the world and across the country were attracted to Whampoa.”

In fits and starts since the end of the Mao era, the Communists and the Kuomintang, who decamped to Taiwan after losing the civil war in 1949, have been engaging in rapprochement. The Whampoa academy represents an era when the two sides cooperated for a greater good, and recent exhibitions organized there by a museum portray the Kuomintang in a relatively conciliatory light. That, too, has resonance with Mr. Xi’s clarion call, which is meant to inspire all Chinese, even those outside the mainland, including in Taiwan, to take part in the Communist-led project of reviving the motherland.

The first class at Whampoa had 600 students, 100 Communists among them, Mr. Zeng said. Prominent Russian advisers worked at the school. Zhou Enlai was the political director, and other famous Communists held posts or trained there. But the school was never under the party’s control.

The Kuomintang moved it to the city of Nanjing in 1927, after a split with the Communists, and then to the southwestern city of Chengdu, after the Japanese occupied Nanjing, then known as Nanking. After the Kuomintang moved to Taiwan, they established a military academy there that they called the successor to Whampoa. But when historians speak of Whampoa, they mean the original incarnation of the school, before it moved from Guangzhou, Mr. Zeng said.

Japanese bombs decimated the campus in 1938; it was not rebuilt until after 1984, when plans were made to establish a museum. The white buildings interlaced with thick wooden beams are recreations of the originals. A statue of Mr. Sun overlooks the site from a hill. Military enthusiasts, history buffs and other tourists reach the museum by a 10-minute ferry ride from a quiet pier on the east side of Guangzhou.

On a recent afternoon, a young woman guided a handful of soldiers. They walked along a balcony on the second floor and peered into the recreated rooms, including a dormitory with dozens of simple beds on wooden floorboards, a dining room and Mr. Sun’s office.

Outside the main gate, not far from a black wall inscribed with the names of fallen soldiers, tour groups posed for photographs. Then they walked slowly through the gallery rooms to gaze at the black-and-white photos and paintings that showed, from a party-approved perspective, the history of China’s 20th-century wars.

This year, there was a special exhibition on Chinese soldiers who had fought the Japanese in southwest China, along the Burma Road. The exhibition included photographs of Lt. Gen. Claire Lee Chennault, the American aviator who led the “Flying Tigers” unit in that theater. One showed him with Mr. Chiang.

Mia Li contributed research.

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Police offer ‘virtual ridealongs’ via Twitter

SIOUX FALLS, S.D. (AP) — Riding side by side as a police officer answers a call for help or investigates a brutal crime during a ridealong gives citizens an up close look at the gritty and sometimes dangerous situations officers can experience on the job.

But a new social media approach to informing the public about what officers do is taking hold at police departments across the United States and Canada — one that is far less dangerous for citizens but, police say, just as informative.

With virtual ridealongs on Twitter, or tweetalongs, curious citizens just need a computer or smartphone for a glimpse into law enforcement officers‘ daily routines.

Tweetalongs typically are scheduled for a set number of hours, with an officer — or a designated tweeter like the department’s public information officer — posting regular updates to Twitter about what they see and do while on duty. The tweets, which also include photos and links to videos of the officers, can encompass an array of activities — everything from an officer responding to a homicide to a noise complaint.

Police departments say virtual ridealongs reach more people at once and add transparency to the job.

“People spend hard-earned money on taxes to allow the government to provide services. That’s police, fire, water, streets, the whole works, and there should be a way for those government agencies to let the public know what they’re getting for their money,” said Chief Steve Allender of the Rapid City Police Department in South Dakota, which started offering tweetalongs several months ago — https://twitter.com/rcpdtweetalong — after watching departments in Seattle, Kansas City, Mo., and Las Vegas do so.

On the day before Thanksgiving, Tarah Heupel, the Rapid City Police Department’s public information officer, rode alongside Street Crimes Officer Ron Terviel. Heupel posted regular updates every few minutes about what Terviel was doing, including the officer citing a woman for public intoxication, responding to a call of three teenagers attempting to steal cough syrup and body spray from a store and locating a man who ran from the scene of an accident. Photos were included in some of the tweets.

Michael Taddesse, a 34-year-old university career specialist in Arlington, Texas, has done several ridealongs with police and regularly follows multiple departments that conduct tweetalongs.

“I think the only way to effectively combat crime is to have a community that is engaged and understands what’s going on,” he said.

Ridealongs where “you’re out in the elements” are very different than sitting behind a computer during a tweetalong and the level of danger is “dramatically decreased,” he said. But in both instances, the passenger gains new information about the call, what laws may or may not have been broken and what transpires, he added.

For police departments, tweetalongs are just one more way to connect directly with a community through social media.

More than 92 percent of police departments use social media, according to a survey of 600 agencies in 48 states conducted by the International Association of Chiefs of Police’s Center for Social Media. And Nancy Kolb, senior program manager for IACP, called tweetalongs a “growing trend” among departments of all sizes.

There is no set protocol and departments are free to conduct the tweetalong how they see fit, she said.

In Ontario, Canada, the Niagara Regional Police Service conducted their first virtual ridealong in August over a busy eight-hour Friday night shift. The police department’s followers were able to see a tweet whenever the police unit was dispatched to one of the more than 140,000 calls received that night.

Richard Gadreau, the social media officer for the police department, said officers routinely take people out on real ridealongs, but there is a waiting list and preference is given to people interested in becoming an officer.

With tweetalongs, many calls also mean many tweets. Kolb said departments are cognizant of cluttering peoples’ Twitter feeds.

That’s why the Rapid City Police Department decided to create a separate account for the tweetalong, Allender said.

Kolb also said officers are careful not to tweet personal or sensitive information. Officers typically do not tweet child abuse or domestic abuse cases, and they usually only tweet about a call after they leave the scene to protect officers and callers.

But Allender, the chief of police in Rapid City, said tweetalongs also show some of the more outrageous calls police deal with on a regular basis — like the kid who breaks out the window of a police car while the officer is standing on the sidewalk.

“Real life is funnier than any comedy show out there and not to make fun of people, embarrass them or humiliate them, but people do funny things,” Allender said. “… I mean, that guy deserves a little bit of ridicule, and everyone who would be watching would agree. That’s just good clean fun to me.”

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Rapid City Police Department’s “Tweetalong” account: https://twitter.com/rcpdtweetalong

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Follow Kristi Eaton on Twitter at http://twitter.com/kristieaton

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Net loss: Brooklyn fires coach Avery Johnson

NEW YORK (AP) — Coach of the month in November, out of a job by New Year's.

The Brooklyn Nets have elevated expectations this season, and a .500 record wasn't good enough. Coach Avery Johnson was fired Thursday, his team having lost 10 of 13 games after a strong start to its first season in Brooklyn.

"We don't have the same fire now than we did when we were 11-4," general manager Billy King said at a news conference in East Rutherford, N.J. "I tried to talk to Avery about it and we just can't figure it out. The same pattern kept on happening."

Assistant P.J. Carlesimo will coach the Nets on an interim basis, starting Friday night with a home game against Charlotte. King said the Nets might reach out to other candidates, but for now the job was Carlesimo's. The GM wouldn't comment on a report that the team planned to get in touch with former Lakers coach Phil Jackson.

King said the decision to dismiss Johnson was made by ownership after a phone discussion Thursday morning. Owner Mikhail Prokhorov had expressed faith in Johnson before the season.

"With the direction we were going we felt we had to make a change," King said.

Johnson was in the final year of a three-year, $12 million contract.

"It's a really disappointing day for me and my family. It's my wife's birthday. It's not a great birthday gift," Johnson said. "I didn't see this coming. But this is ownership's decision. It's part of the business. Fair or unfair, it's time for a new voice and hopefully they'll get back on track."

The Nets have fallen well behind the first-place New York Knicks, the team they so badly want to compete with in their new home. But after beating the Knicks in their first meeting Nov. 26, probably the high point of Johnson's tenure, the Nets went 5-10 and frustrations have been mounting.

"Our goal is to get to the conference finals," King said. "We started out good and then we stumbled. We have to get back to playing winning basketball. It's the entire team. It's not like golf, where Tiger Woods can blame the caddie. It takes five guys on the court and they're all struggling. We have to figure out the ways to get back to winning. I don't know what happened. I'm not sure. But unfortunately, it did happen."

The Nets were embarrassed by Boston on national TV on Christmas, then were routed by Milwaukee 108-93 on Wednesday night for their fifth loss in six games.

Star guard Deron Williams recently complained about Johnson's offense, and Nets CEO Brett Yormark took to Twitter after the loss to Celtics to voice his displeasure with the performance.

King said the change was not made because Williams was unhappy, and he added the point guard himself has to play better.

Johnson also stood by Williams.

"From Day One, I always had a really good relationship with him. I don't think it's fair for anyone to hang this on Deron," Johnson said. "We were just going through a bad streak, a bad spell. It's not time for me to be down on one player. That would be the easy way."

Brooklyn started the season 11-4, winning five in a row to end November, when Johnson was Eastern Conference coach of the month. But he couldn't do anything to stop this slump, one the Nets never anticipated after a $350 million summer spending spree they believed would take them toward the top of their conference.

Johnson has been the Nets' coach for a little more than two seasons. He went 60-116 with the Nets, who moved from New Jersey to Brooklyn to start the season. Johnson coached the Dallas Mavericks to a spot in the NBA Finals in 2006.

"You don't always get a fair shake as a coach," Johnson said. "I'm not the owner. If I were the owner, I wouldn't have fired myself today. But life is not always necessary fair. It's a business and in this business, the coach always gets blamed."

This is the NBA's second coaching change this season following the dismissal of Mike Brown by the Los Angeles Lakers.

Johnson arrived in New Jersey with a 194-70 record, a .735 winning percentage that was the highest in NBA history, but had little chance of success in his first two seasons while the Nets focused all their planning on the move to Brooklyn.

They looked to make a splash this summer when they re-signed Williams and fellow starters Gerald Wallace, Brook Lopez and Kris Humphries, traded for Atlanta All-Star Joe Johnson, and added veteran depth with players such as Reggie Evans, C.J. Watson and Andray Blatche.

Johnson didn't have a contract beyond this season but seemed to have the confidence of Prokhorov, the Russian billionaire who before the season said he had faith in "the Avery defense system."

Some thought the Nets would finish as high as second in the East behind defending champion Miami, and the predictions seemed warranted when the Nets started quickly amid much fanfare. But all the good publicity faded in recent weeks once the losing started.

Williams, who has struggled this season, stirred the waters when he expressed his preference for the offense he ran under Jerry Sloan in Utah before a loss to the Jazz. Williams and Johnson, nicknamed "Brooklyn's Backcourt" and expected to be one of the best in the NBA, have shot poorly and rarely meshed.

The Nets were embarrassed near the end of their 93-76 loss to Boston, when fans exited early amid a chant of "Let's go Celtics!"

"Nets fans deserved better," Yormark tweeted after the game. "The entire organization needs to work harder to find a solution. We will get there."

Not under Johnson, though.

The Nets should be able to entice a big-name coach with Prokhorov's billions and the chance to play in a major market at Barclays Center, the $1 billion arena that has drawn praise in the city and from visiting teams.

Carlesimo has previous NBA head coaching experience in Portland, Golden State and Seattle/Oklahoma City. He has a career coaching record of 204-296 in the regular season and 3-9 in the playoffs.

"Right now, P.J. is our coach and I told him to coach the team like he'll be here for the next 10 years," King said.

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AP Sports Writer Tom Canavan in East Rutherford and AP freelancer Jim Hague contributed to this report.

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