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Math @ Duke





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Yunliang Yu, IT Senior Manager

Yunliang Yu

Open source is an investment in the future.

FDS Motto: we serve and empower the faculty.

Contact Info:
Office Location:  029D Physics
Office Phone:  (919) 660-2803
Email Address:   send me a message
Web Page:   http://www.math.duke.edu/~yu

Office Hours:

12:01AM - 12:02AM every other day except today.
Not by appt :-)
Specialties:

Mathematics
Recent Publications

  1. Y. Yu, test 123 (March, 2010). [PNG, PDF]

Famous Sayings:
Your dream will come true, if you eat your soup.
    --- Angela Yu
Don't be a turkey; read a book.
    --- Christina Yu
Security = avoid "unexpected inputs for unintended results".
    --- moi
To learn and practice what is learned from time to time is pleasure, is it not? To have friends from afar is happiness, is it not? To be unperturbed when not appreciated by others is a gentleman, is it not?
    --- Kungfu Zi
Better to light a candle than to curse the darkness.
    --- Chinese Proverb

mathprograms.org, academicjobsonline.org, mathjobs.org, ShortURLs, sharedworkingplace.org, chinesecalligraphyandwoodcarving.

/. headline news :-)

  • Apple's Next Frontier Is Your Body
    2015-04-26T15:32:00+00:00
    Lashdots writes: Amid the unveiling of the Apple Watch, Tim Cook's wrist distracted from another new product last month: ResearchKit, an open source iOS platform designed to help researchers design apps for medical studies—and reach millions of potential research subjects through their iPhones. Alongside the company's new frontiers, like the car and the home, Cook told Jim Cramer last month that health "may be the biggest one of all." As Fast Company reports, Cook says Apple's devices could could help pinpoint diseases within decades—and position the company at the center of a "significantly underestimated" mobile-health industry.

    Read more of this story at Slashdot.

  • Nepal Earthquake: Facebook To Google, How Tech Is Helping Survivors Reach Out
    2015-04-26T14:29:00+00:00
    An anonymous reader writes: In the aftermath of the earthquake that struck Nepal, many social media sites and mobile applications have come up with features that could help locate friends and loved ones. From the Times of India: "Social networking website Facebook, and Google's Person Finder have helped locate the whereabouts of those stranded in quake-hit areas. For instance, members of one Himmatramka family residing in Birgunj in Nepal marked themselves safe on Facebook. 'Our relatives back in India were worried about our safety. So, we marked ourselves safe to inform them,' said Nitesh Himmatramka.

    Read more of this story at Slashdot.

  • Tiny Robots Climb Walls Carrying More Than 100 Times Their Weight
    2015-04-26T13:24:00+00:00
    schwit1 writes: Mighty things come in small packages. The little robots in this video can haul things that weigh over 100 times more than themselves. The super-strong bots — built by mechanical engineers at Stanford — will be presented next month at the International Conference on Robotics and Automation in Seattle, Washington. The secret is in the adhesives on the robots' feet. Their design is inspired by geckos, which have climbing skills that are legendary in the animal kingdom. The adhesives are covered in minute rubber spikes that grip firmly onto the wall as the robot climbs. When pressure is applied, the spikes bend, increasing their surface area and thus their stickiness. When the robot picks its foot back up, the spikes straighten out again and detach easily.

    Read more of this story at Slashdot.

  • In New AI Benchmark, Computer Takes On Four Top Professional Poker Players
    2015-04-26T12:22:00+00:00
    HughPickens.com writes: Stephen Jordan reports at the National Monitor that four of the world's greatest poker players are going into battle against a computer program that researchers are calling Claudico in the "Brains Vs. Artificial Intelligence" competition at Rivers Casino in Pittsburgh. Claudico, the first machine program to play heads-up no-limit Texas Hold'em against top human players, will play nearly 20,000 hands with each human poker player over the next two weeks. "Poker is now a benchmark for artificial intelligence research, just as chess once was. It's a game of exceeding complexity that requires a machine to make decisions based on incomplete and often misleading information, thanks to bluffing, slow play and other decoys," says Tuomas Sandholm, developer of the program. "And to win, the machine has to out-smart its human opponents." In total, that will be 1,500 hands played per day until May 8, with just one day off to allow the real-life players to rest. An earlier version of the software called Tartanian 7 (PDF) was successful in winning the heads-up, no-limit Texas Hold'em category against other computers in July, but Sandholm says that does not necessarily mean it will be able to defeat a human in the complex game. "I think it's a 50-50 proposition," says Sandholm. "My strategy will change more so than when playing against human players," says competitor Doug Polk, widely considered the world's best player, with total live tournament earnings of more than $3.6 million. "I think there will be less hand reading so to speak, and less mind games. In some ways I think it will be nice as I can focus on playing a more pure game, and not have to worry about if he thinks that I think, etc."

    Read more of this story at Slashdot.

  • Declassified Report From 2009 Questions Effectiveness of NSA Spying
    2015-04-26T08:53:00+00:00
    schwit1 writes: With debate gearing up over the coming expiration of the Patriot Act surveillance law, the Obama administration on Saturday unveiled a 6-year-old report examining the once-secret program code-named Stellarwind, which collected information on Americans' calls and emails. The report was from the inspectors general of various intelligence and law enforcement agencies. They found that while many senior intelligence officials believe the program filled a gap by increasing access to international communications, others including FBI agents, CIA analysts and managers "had difficulty evaluating the precise contribution of the [the surveillance system] to counterterrorism efforts because it was most often viewed as one source among many available analytic and intelligence-gathering tools in these efforts." "The report said that the secrecy surrounding the program made it less useful. Very few working-level C.I.A. analysts were told about it. ... Another part of the newly disclosed report provides an explanation for a change in F.B.I. rules during the Bush administration. Previously, F.B.I. agents had only two types of cases: "preliminary" and "full" investigations. But the Bush administration created a third, lower-level type called an "assessment." This development, it turns out, was a result of Stellarwind.

    Read more of this story at Slashdot.

  • Debian 8 Jessie Released
    2015-04-26T05:29:00+00:00
    linuxscreenshot writes: After almost 24 months of constant development, the Debian project is proud to present its new stable version 8 (code name Jessie), which will be supported for the next five years thanks to the combined work of the Debian Security team and the Debian Long Term Support team. (Release notes.) Jessie ships with a new default init system, systemd. The systemd suite provides features such as faster boot times, cgroups for services, and the possibility of isolating part of the services. The sysvinit init system is still available in Jessie. Screenshots and a screencast are available.

    Read more of this story at Slashdot.

  • Random Generator Parodies Vapid Startup Websites
    2015-04-26T02:10:00+00:00
    alphadogg writes: A pair of Georgia Tech computer science students have created a Random Startup Website Generator that spits out a different jargon-laden startup website every time you click on the URL. Mike Bradley and Tiffany Zhang's project "serves as a parody of startups that have websites full of vague praise and little information about their actual business, often because they have little to show in that regard."

    Read more of this story at Slashdot.

  • Think Tanks: How a Bill [Gates Agenda] Becomes a Law
    2015-04-26T00:04:00+00:00
    theodp writes: The NY Times' Eric Lipton was just awarded a 2015 Pulitzer Prize for investigative reporting that shed light on how foreign powers buy influence at think tanks. So, it probably bears mentioning that Microsoft's 'two-pronged' National Talent Strategy (PDF) to increase K-12 CS education and the number of H-1B visas — which is on the verge of being codified into laws — was hatched at an influential Microsoft and Gates Foundation-backed think tank mentioned in Lipton's reporting, the Brookings Institution. In 2012, the Center for Technology Innovation at Brookings hosted a forum on STEM education and immigration reforms, where fabricating a crisis was discussed as a strategy to succeed with Microsoft's agenda after earlier lobbying attempts by Bill Gates and Microsoft had failed. "So, Brad [Microsoft General Counsel Brad Smith]," asked the Brookings Institution's Darrell West at the event, "you're the only [one] who mentioned this topic of making the problem bigger. So, we galvanize action by really producing a crisis, I take it?" "Yeah," Smith replied (video). And, with the help of nonprofit organizations like Code.org and FWD.us that were founded shortly thereafter, a national K-12 CS and tech immigration crisis was indeed created.

    Read more of this story at Slashdot.

  • Ask Slashdot: What Are the Most Stable Smartphones These Days?
    2015-04-25T22:58:00+00:00
    janimal writes: The iPhone used to be the smartphone that "just works." Ever since the 4S days, this has been true less and less with each generation. My wife's iPhone 6 needs to be restarted several times per week for things like internet search or making calls to work. An older 5S I'm using also doesn't consistently stream to Apple TV, doesn't display song names correctly on Apple TV and third party peripherals. In short, as features increase, the iPhone's stability is decreasing. In your opinion, which smartphone brand these days is taking up the slack and delivering a fully featured smartphone that "just works"?

    Read more of this story at Slashdot.

  • FCC Chairman: a Former Cable Lobbyist Who Helped Kill the Comcast Merger
    2015-04-25T21:51:00+00:00
    An anonymous reader writes: After Friday's news that the Comcast/TWC merger is dead, the Washington Post points out an interesting fact: FCC Chairman Tom Wheeler, who was instrumental in throwing up roadblocks for the deal, used to be a lobbyist for the cable and wireless industry. "Those who predicted Wheeler would favor industry interests 'misunderstood him from the beginning — the notion that because he had represented various industries, he was suddenly in their pocket never made any sense,' said one industry lawyer, who spoke on the condition of anonymity because he represents clients before the FCC." The "revolving door" between government and industry is often blamed for many of the problems regulating corporations. We were worried about it ourselves when Wheeler was nominated for his current job. I guess this goes to show that it depends more on the person than on their previous job.

    Read more of this story at Slashdot.

  • Oculus Rift: 2015 Launch Unlikely, But Not Impossible
    2015-04-25T20:50:00+00:00
    An anonymous reader writes: Earlier this week during Facebook's 2015 Q1 earnings call, the company seemed to suggest that a 2015 Oculus Rift release date was unlikely. At least, that's what a report about the call from Gamasutra indicated, saying, "It doesn't sound like Oculus will ship the consumer version of its Oculus Rift VR headset this year, or at least not in very large quantities." However, an equity analyst has chimed in to say that the language used during the call shouldn't be interpreted colloquially, concluding that "...there is no information here that rules out Oculus shipping in 2015."

    Read more of this story at Slashdot.

  • Liquid Mercury Found Under Mexican Pyramid
    2015-04-25T19:48:00+00:00
    An anonymous reader writes: An archaeologist has discovered liquid mercury at the end of a tunnel beneath a Mexican pyramid, a finding that could suggest the existence of a king's tomb or a ritual chamber far below one of the most ancient cities of the Americas. Mexican researcher Sergio Gómez ... has spent six years slowly excavating the tunnel, which was unsealed in 2003 after 1,800 years. Last November, Gómez and a team announced they had found three chambers at the tunnel’s 300ft end, almost 60ft below the the temple. Near the entrance of the chambers, they a found trove of strange artifacts: jade statues, jaguar remains, a box filled with carved shells and rubber balls.

    Read more of this story at Slashdot.

  • Vizio, Destroyer of Patent Trolls
    2015-04-25T18:44:00+00:00
    An anonymous reader writes: We read about a lot of patent troll cases. Some are successful and some are not, but many such cases are decided before ever going to court. It's how the patent troll operates — they know exactly how high litigation costs are. Even without a legal leg to stand on, they can ask for settlements that make better financial sense for the target to accept, rather than dumping just as much money into attorney's fees for an uncertain outcome. Fortunately, some companies fight back. TV-maker Vizio is one of these, and they've successfully defended against 16 different patent trolls, some with multiple claims. In addition, they're going on the offensive, trying to wrest legal fees from the plaintiffs for their spurious claims. "For the first time, it stands a real chance, in a case where it spent more than $1 million to win. Two recent Supreme Court decisions make it easier for victorious defendants to collect fees in patent cases. The TV maker is up against a storied patent plaintiffs' firm, Chicago-based Niro, Haller & Niro, that has fought for Oplus tooth and nail. ... For Vizio, the company feels that it's on the verge of getting vindication for a long-standing policy of not backing down to patent trolls."

    Read more of this story at Slashdot.

  • A Guide To the 5 Cybersecurity Bills Now Before Congress
    2015-04-25T17:41:00+00:00
    blottsie writes: At press time, the House had passed two cybersecurity bills, one Senate bill had been passed out of committee and reported to the full chamber for a final vote, and a third House bill and a second Senate bill were awaiting review by the appropriate committee. The two House bills that passed earlier this week will be combined and sent to the Senate, but the Senate won't take up them up directly; instead, it will vote on its own two bills. It's complicated, so here's a quick breakdown of the key details.

    Read more of this story at Slashdot.

  • Giant Survival Ball Will Help Explorer Survive a Year On an Iceberg
    2015-04-25T16:40:00+00:00
    HughPickens.com writes: Ben Yeager reports in Outside Magazine that Italian explorer Alex Bellini plans to travel to Greenland's west coast, pick an iceberg, and live on it for a year as it melts out in the Atlantic. It's a precarious idea. Bellini will be completely isolated, and his adopted dwelling is liable to roll or fall apart at any moment, thrusting him into the icy sea or crushing him under hundreds of tons of ice. His solution: an indestructible survival capsule built by an aeronautics company that specializes in tsunami-proof escape pods. "I knew since the beginning I needed to minimize the risk. An iceberg can flip over, and those events can be catastrophic." Bellini plans to use a lightweight, indestructible floating capsules, or "personal safety systems" made from aircraft-grade aluminum in what's called a continuous monocoque structure, an interlocking frame of aluminum spars that evenly distribute force, underneath a brightly painted and highly visible aluminum shell. The inner frame can be stationary or mounted on roller balls so it rotates, allowing the passengers to remain upright at all times. Aeronautical engineer Julian Sharpe, founder of Survival Capsule, got the idea for his capsules after the 2004 Indonesian tsunami. He believes fewer people would have died had some sort of escape pod existed. Sharpe hopes the products will be universal—in schools, retirement homes, and private residences, anywhere there is severe weather. The product appeals to Bellini because it's strong enough to survive a storm at sea or getting crushed between two icebergs. Bellini will spend almost all of his time in the capsule with the hatch closed, which will pose major challenges because he'll have to stay active without venturing out onto a slippery, unstable iceberg. If it flips, he'll have no time to react. "Any step away from [the iceberg] will be in unknown territory," says Bellini. "You want to stretch your body. But then you risk your life."

    Read more of this story at Slashdot.

 

dept@math.duke.edu
ph: 919.660.2800
fax: 919.660.2821

Mathematics Department
Duke University, Box 90320
Durham, NC 27708-0320