social media

Twitter Can Now Predict Crime, and This Raises Serious Questions

Curated on April 28, 2014May 29, 2019 by Stefaan Verhulst

Motherboard: “Police departments in New York City may soon be using geo-tagged tweets to predict crime. It sounds like a far-fetched sci-fi scenario a la Minority Report, but when I contacted Dr. Matthew Greber, the University of Virginia researcher behind the technology, he explained that the system is far more mathematical than metaphysical.
The system Greber has devised is an amalgam of both old and new techniques. Currently, many police departments target hot spots for criminal activity based on actual occurrences of crime. This approach, called kernel density estimation (KDE), involves pairing a historical crime record with a geographic location and using a probability function to calculate the possibility of future crimes occurring in that area. While KDE is a serviceable approach to anticipating crime, it pales in comparison to the dynamism of Twitter’s real-time data stream, according to Dr. Gerber’s research paper “Predicting Crime Using Twitter and Kernel Density Estimation”.
Dr. Greber’s approach is similar to KDE, but deals in the ethereal realm of data and language, not paperwork. The system involves mapping the Twitter environment; much like how police currently map the physical environment with KDE. The big difference is that Greber is looking at what people are talking about in real time, as well as what they do after the fact, and seeing how well they match up. The algorithms look for certain language that is likely to indicate the imminent occurrence of a crime in the area, Greber says. “We might observe people talking about going out, getting drunk, going to bars, sporting events, and so on—we know that these sort of events correlate with crime, and that’s what the models are picking up on.”
Once this data is collected, the GPS tags in tweets allows Greber and his team to pin them to a virtual map and outline hot spots for potential crime. However, everyone who tweets about hitting the club later isn’t necessarily going to commit a crime. Greber tests the accuracy of his approach by comparing Twitter-based KDE predictions with traditional KDE predictions based on police data alone. The big question is, does it work? For Greber, the answer is a firm “sometimes.” “It helps for some, and it hurts for others,” he says.
According to the study’s results, Twitter-based KDE analysis yielded improvements in predictive accuracy over traditional KDE for stalking, criminal damage, and gambling. Arson, kidnapping, and intimidation, on the other hand, showed a decrease in accuracy from traditional KDE analysis. It’s not clear why these crimes are harder to predict using Twitter, but the study notes that the issue may lie with the kind of language used on Twitter, which is characterized by shorthand and informal language that can be difficult for algorithms to parse.
This kind of approach to high-tech crime prevention brings up the familiar debate over privacy and the use of users’ date for purposes they didn’t explicitly agree to. The case becomes especially sensitive when data will be used by police to track down criminals. On this point, though he acknowledges post-Snowden societal skepticism regarding data harvesting for state purposes, Greber is indifferent. “People sign up to have their tweets GPS tagged. It’s an opt-in thing, and if you don’t do it, your tweets won’t be collected in this way,” he says. “Twitter is a public service, and I think people are pretty aware of that.”…

New York Police Twitter Strategy Has Unforeseen Consequences

Curated on April 24, 2014August 3, 2018 by Stefaan Verhulst

J. David Goodman in The New York Times: “The New York Police Department has long seen its crime-fighting strategies emulated across the country and around the world.

So when a departmental Twitter campaign, meant to elicit smiling snapshots, instead attracted tens of thousands of less flattering images of officers, it did not take long for the hashtag #myNYPD to spread far beyond the five boroughs.

By Wednesday, the public relations situation in New York City had sparked imitators from Los Angeles (#myLAPD) to Mexico (#MiPolicíaMexicana) and over the ocean to Greece (#myELAS), Germany (#DankePolizei) and France (#maPolice).

The images, including circles of police officers, in riot gear poised to strike a man on a bench, or hosing down protesters, closely resembled those posted on Tuesday by critics of the Police Department in New York, in which many of the most infamous moments in recent police history had been dredged up by Twitter users….”

'Hackathons' Aim to Solve Health Care's Ills

Curated on April 8, 2014May 29, 2019 by Stefaan Verhulst

Amy Dockser Marcus in the Wall Street Journal: “Hackathons, the high-octane, all-night problem-solving sessions popularized by the software-coding community, are making their way into the more traditional world of health care. At Massachusetts Institute of Technology, a recent event called Hacking Medicine’s Grand Hackfest attracted more than 450 people to work for one weekend on possible solutions to problems involving diabetes, rare diseases, global health and information technology used at hospitals.
Health institutions such as New York-Presbyterian Hospital and Brigham and Women’s Hospital in Boston have held hackathons. MIT, meantime, has co-sponsored health hackathons in India, Spain and Uganda.
Hackathons of all kinds are increasingly popular. Intel Corp. recently bought a group that organizes them. Companies hoping to spark creative thinking sponsor them. And student-run hackathons have turned into intercollegiate competitions.
But in health care, where change typically comes much more slowly than in Silicon Valley, they represent a cultural shift. To solve a problem, scientists and doctors can spend years painstakingly running experiments, gathering data, applying for grants and publishing results. So the idea of an event where people give two-minute pitches describing a problem, then join a team of strangers to come up with a solution in the course of one weekend is radical.
“We are not trying to replace the medical culture with Facebook culture,” said Elliot Cohen, who wore a hoodie over a button-down dress shirt at the MIT event in March and helped start MIT Hacking Medicine while at business school. “But we want to try to blend them more.”
Mr. Cohen co-founded and is chief technology officer at PillPack, a pharmacy that sends customers personalized packages of their medications, a company that started at a hackathon.
At MIT’s health-hack, physicians, researchers, students and a smattering of people wearing Google Glass sprawled on the floor of MIT’s Media Lab and at tables with a view of the Boston skyline. At one table, a group of college students, laptops plastered with stickers, pulled juice boxes and snacks out of backpacks, trash piling up next to them as they feverishly wrote code.
Nupur Garg, an emergency-room physician and one of the eventual winners, finished her hospital shift at 2 a.m. Saturday in New York, drove to Boston and arrived at MIT in time to pitch the need for a way to capture images of patients’ ears and throats that can be shared with specialists to help make diagnoses. She and her team immediately started working on a prototype for the device, testing early versions on anyone who stopped by their table.
Dr. Garg and teammate Nancy Liang, who runs a company that makes Web apps for 3-D printers, caught a few hours of sleep in a dorm room Saturday night. They came up with the idea for their product’s name—MedSnap—later that night while watching students use cellphone cameras to send SnapChats to one another. “There was no time to conduct surveys on what was the best name,” said Ms. Liang. “Many ideas happen after midnight.”
Winning teams in each category won $1,000, as well as access to the hackathons sponsors for advice and pilot projects.
Yet even supporters say hackathons can’t solve medicine’s challenges overnight. Harlan Krumholz, a professor at Yale School of Medicine who ran a many-months trial that found telemonitoring didn’t reduce hospitalizations or deaths of cardiology patients, said he supports the problem-solving ethos of hackathons. But he added that “improvements require a long-term commitment, not just a weekend.”
Ned McCague, a data scientist at Blue Cross Blue Shield of Massachusetts, served as a mentor at the hackathon. He said he wasn’t representing his employer, but he used his professional experiences to push groups to think about the potential customer. “They have a good idea and are excited about it, but they haven’t thought about who is paying for it,” he said.
Zen Chu, a senior lecturer in health-care innovation and entrepreneur-in-residence at MIT, and one of the founders of Hacking Medicine, said more than a dozen startups conceived since the first hackathon, in 2011, are still in operation. Some received venture-capital funding.
The upsides of hackathons were made clear to Sharon Moalem, a physician who studies rare diseases. He had spent years developing a mobile app that can take pictures of faces to help diagnose rare genetic conditions, but was stumped on how to give the images a standard size scale to make comparisons. At the hackathon, Dr. Moalem said he was approached by an MIT student who suggested sticking a coin on the subjects’ forehead. Since quarters have a standard measurement, it “creates a scale,” said Dr. Moalem.
Dr. Moalem said he had never considered such a simple, elegant solution. The team went on to write code to help standardize facial measurements based on the dimensions of a coin and a credit card.
“Sometimes when you are too close to something, you stop seeing solutions, you only see problems,” Dr. Moalem said. “I needed to step outside my own silo.”

Smart cities are here today — and getting smarter

Curated on April 3, 2014August 3, 2018 by Stefaan Verhulst

Computer World: “Smart cities aren’t a science fiction, far-off-in-the-future concept. They’re here today, with municipal governments already using technologies that include wireless networks, big data/analytics, mobile applications, Web portals, social media, sensors/tracking products and other tools.
These smart city efforts have lofty goals: Enhancing the quality of life for citizens, improving government processes and reducing energy consumption, among others. Indeed, cities are already seeing some tangible benefits.
But creating a smart city comes with daunting challenges, including the need to provide effective data security and privacy, and to ensure that myriad departments work in harmony.

The global urban population is expected to grow approximately 1.5% per year between 2025 and 2030, mostly in developing countries, according to the World Health Organization.

What makes a city smart? As with any buzz term, the definition varies. But in general, it refers to using information and communications technologies to deliver sustainable economic development and a higher quality of life, while engaging citizens and effectively managing natural resources.
Making cities smarter will become increasingly important. For the first time ever, the majority of the world’s population resides in a city, and this proportion continues to grow, according to the World Health Organization, the coordinating authority for health within the United Nations.
A hundred years ago, two out of every 10 people lived in an urban area, the organization says. As recently as 1990, less than 40% of the global population lived in a city — but by 2010 more than half of all people lived in an urban area. By 2050, the proportion of city dwellers is expected to rise to 70%.
As many city populations continue to grow, here’s what five U.S. cities are doing to help manage it all:

Scottsdale, Ariz.

The city of Scottsdale, Ariz., has several initiatives underway.
One is MyScottsdale, a mobile application the city deployed in the summer of 2013 that allows citizens to report cracked sidewalks, broken street lights and traffic lights, road and sewer issues, graffiti and other problems in the community….”

Crowdsourcing “Monopoly”

Curated on April 3, 2014August 3, 2018 by Stefaan Verhulst

The Economist: “In 1904 a young American named Elizabeth Magie received a patent for a board game in which players used tokens to move around a four-sided board buying properties, avoiding taxes and jail, and collecting $100 every time they passed the board’s starting-point. Three decades later Charles Darrow, a struggling salesman in Pennsylvania, patented a tweaked version of the game as “Monopoly”. Now owned by Hasbro, a big toymaker, it has become one of the world’s most popular board games, available in dozens of languages and innumerable variations.
Magie was a devotee of Henry George, an economist who believed in common ownership of land; her game was designed to be a “practical demonstration of the present system of land-grabbing with all its usual outcomes and consequences.” And so it has become, though players snatch properties more in zeal than sadness. In “Monopoly” as in life, it is better to be rich than poor, children gleefully bankrupt their parents and nobody uses a flat iron any more.
Board-game makers have had to find their footing in a digital age. Hasbro’s game-and-puzzle sales fell by 4% in 2010—the year the iPad came to market—and 10% in 2011. Since then, however, its game-and-puzzle sales have rebounded, rising by 2% in 2012 and 10% in 2013. Stephanie Wissink, a youth-market analyst with Piper Jaffray, an investment bank, says that Hasbro has learned to become “co-creative…They’re infusing more social-generated content into their marketing and product development.”
Some of that content comes from Facebook. Last year, “Monopoly” fans voted on Hasbro’s Facebook page to jettison the poor old flat iron in favour of a new cat token. “Scrabble” players are voting on which word to add to the new dictionary (at press time, 16 remain, including “booyah”, “adorbs” and “cosplay”). “Monopoly” fans, meanwhile, are voting on which of ten house rules—among them collecting $400 rather than $200 for landing on “Go”, requiring players to make a full circuit of the board before buying property and “Mom always gets out of jail free. Always. No questions asked”—to make official…”

Facebook’s Connectivity Lab will develop advanced technology to provide internet across the world

Curated on April 3, 2014August 3, 2018 by Stefaan Verhulst

Signe Brewster and Lauren Hockenson at GigaOm: “The Internet.org initiative will rely on a new team at Facebook called the Connectivity Lab, based at the company’s Menlo Park campus, to develop technology on the ground, in the air and in space, CEO Mark Zuckerberg announced Thursday. The team will develop technology like drones and satellites to expand access to the internet across the world.
“The team’s approach is based on the principle that different sized communities need different solutions and they are already working on new delivery platforms—including planes and satellites—to provide connectivity for communities with different population densities,” a post on Internet.org says.
Internet.org, which is backed by companies like Facebook, Samsung and Qualcomm, wants to provide internet to the two thirds of the world that remains disconnected due to cost, lack of infrastructure or remoteness. While many companies are developing business models and partnerships in areas that lack internet, the Connectivity Lab will focus on sustainable technology that will transmit the signals. Facebook envisions using drones that could fly for months to connect suburban areas, while more rural areas would rely on satellites. Both would use infrared lasers to blanket whole areas with connectivity.
Members of the Connectivity Lab have backgrounds at NASA’s Jet Propulsion Laboratory, NASA’s Ames Research Center and the National Optical Astronomy Observatory. Facebook also confirmed today that it acquired five employees from Ascenta, a U.K.-based company that worked on the Zephyr–a solar-powered drone capable of flying for two weeks straight.
The lab’s work will build on work the company has already done in the Philippines and Paraguay, Zuckerberg said in a Facebook post. And, like the company’s Open Compute project, there is a possibility that the lab will seek partnerships with outside countries once the bulk of the technology has been developed.”