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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 :-)

  • FCC Proposes To Extend So-Called "Obamaphone" Program To Broadband
    2015-05-29T02:02:00+00:00
    jfruh writes: The FCC's Lifeline program subsidizes phone service for very poor Americans; it gained notoriety under the label "Obamaphone," even though the program started under Reagan and was extended to cell phones under Clinton. Now the FCC is proposing that the program, which is funded by a fee on telecom providers, be extended to broadband, on the logic that high-speed internet is as necessary today as telephone service was a generation ago.

    Read more of this story at Slashdot.

  • GoPro's Next Adventure: Virtual Reality and Drones
    2015-05-28T23:58:00+00:00
    stowie writes: Rumors have been swirling for some time that GoPro was developing a drone. Well, now it's official. Speaking at the Code Conference, GoPro CEO Nick Woodman announced the company's plans to come out with a quadcopter in the first half of 2016. Woodman said "the quad is in some ways the ultimate GoPro accessory," adding that the company is testing software that will wirelessly sync up GoPro footage to the cloud. In a deal announced with Google, GoPro is also offering a virtual reality system using 16 cameras and Google software.

    Read more of this story at Slashdot.

  • Live Anthrax Shipped Accidentally To S Korea and US Labs
    2015-05-28T23:16:00+00:00
    New submitter hamsterz1 writes: U.S. Officials say that the military mistakenly sent live anthrax to laboratories in nine states and an air base in South Korea, after apparently failing to properly inactivate the bacteria. Four lab workers in the United States and up to 22 overseas have been given precautionary medical treatment. The CDC is investigating the incident and Pentagon spokesman Colonel Steve Warren says, "Out of an abundance of caution, [the Defence Department] has stopped the shipment of this material from its labs pending completion of the investigation."

    Read more of this story at Slashdot.

  • Why Detecting Drones Is a Tough Gig
    2015-05-28T22:32:00+00:00
    An anonymous reader writes with a link to some interesting commentary at Help Net Security from Drone Lab CEO Zain Naboulsi about a security issue of a (so far) unusual kind: detecting drones whose masters are bent on malice. That's relevant after the recent drone flight close enough to the White House to spook the Secret Service, and that wasn't the first -- even if no malice was involved. Drones at their most dangerous in that context are small, quiet, and flying through busy, populated spaces, which makes even detecting them tough, never mind defeating them. From the article, which briefly describes pros and cons of various detection methods: Audio detection does NOT work in urban environments - period. Most microphones only listen well at 25 to 50 feet so, because of the ambient noise in the area, any audio detection method would be rendered useless at 1600 Pennsylvania Avenue. It is also too simple for an operator to change the sound signature of a drone by buying different propellers or making other modifications. It doesn't take much to defeat the many weaknesses of audio detection.

    Read more of this story at Slashdot.

  • Murder Accusations Hang Over Silk Road Boss Ulbricht's Sentencing
    2015-05-28T21:51:00+00:00
    Patrick O'Neill writes: Ross Ulbricht has never been tried for murder but tomorrow, when the convicted Silk Road creator is sentenced to prison, murder will be on the mind of the judge. Despite never filing murder for hire charges, New York federal prosecutors have repeatedly pushed for harsh sentencing because of, they told the judge, Ulbricht solicited multiple murders. The judge herself recently referred to Ulbricht's "commission of murders-for-hire" in a letter about the sentencing, painting an even grimmer picture of Ulbricht's sentencing prospects.

    Read more of this story at Slashdot.

  • Glowforge is a CNC Laser Cutter, not a 3D Printer (Video)
    2015-05-28T21:10:00+00:00
    Co-Founder and CEO Dan Shapiro says, right at the beginning of the interview, that the Glowforge machine is a CNC laser cutter and engraver, not a 3-D Printer. He says they've "simplified the heck" out of the hardware and software, and are making an easy-to-use, non-costly ($2500 has been bandied about as the unit's likely price) device that can fit on a kitchen table -- or, more likely, a workbench at a maker facility. Although Dan did very well on Kickstarter (and afterwards) with his previous venture, Robot Turtles, this time he seems to have raised his first $9 million in the venture capital market, with participation from several MakerBot executives. Glowforge is not the only CNC laser cutter/etcher device out there (or about to be). In Australia, Darkly Labs appears to have raised $569,397 (AUD) on Kickstarter to bring their LazerBlade to life, and already makes a small laser device called the Emblaser. There are others, too, including Boxzy, which did the Kickstarter thing and will now sell you a device that "rapidly transforms into 3 kinds of machines: CNC Mill, 3D Printer & Laser Engraver while enhancing precision & power with ballscrews." All this, and their top-of-the-line "does everything" machine sells for a mere $3500. Obviously, devices to give makers and prototypers the ability to make ever more complex and accurate shapes are coming to market like crazy. We'll continue to keep an eye on all this activity, including a second video interview with Glowforge's Dan Shapiro tomorrow.

    Read more of this story at Slashdot.

  • Android M Arrives In Q3: Native Fingerprint Support, Android Pay, 'Doze' Mode
    2015-05-28T19:54:00+00:00
    MojoKid writes with yet more news from the ongoing Google IO conference: Google I/O kicked off this afternoon and the first topic of discussion was of course Google's next generation mobile operating system. For those that were hoping for a huge UI overhaul or a ton of whiz-bang features, this is not the Android release for you. Instead, Android M is more of a maintenance released focused mainly on squashing bugs and improving stability/performance across the board. Even though Android M is about making Android a more stable platform, there are a few features that have been improved upon or introduced for this release: App Permissions, Chrome Custom Tabs for apps, App Links (instead of asking you which app to choose when clicking a link, Android M's new Intent System can allow apps to verify that they are rightfully in possession of a link), NFC-based Android Pay, standardized fingerprint scanning support, and a new "doze" mode that supposedly offers 2X longer battery life when idle.

    Read more of this story at Slashdot.

  • Android M To Embrace USB Type-C and MIDI
    2015-05-28T19:09:00+00:00
    jones_supa writes: USB Type-C connection is showing up in more and more devices, and Google is rolling support for the interface in its Android M operating system. The most significant additions relate to the USB Power Delivery spec. Charging will now work in both directions. That effectively means that Type-C devices can be used as external batteries for other devices. Android M is also finally introducing a feature that musicmakers have been long asking for: MIDI support. This builds on some of the audio features Google introduced in Android 5, including reduction in latency, multichannel audio stream mixing, and support for USB microphones, amplifiers, speakers, and other accessories. As others have written, music and media creation apps are much more prevalent in iOS than they are in Android, and Google hopes turning that around.

    Read more of this story at Slashdot.

  • Cloud Boom Drives Sales Boom For Physical Servers
    2015-05-28T18:28:00+00:00
    jfruh writes: The promise of the cloud is that your storage and computing problems will be abstracted away from messy physical objects that you need to maintain, taken care of far way by other people. Well, it turns out that those other people need to buy a lot of servers.

    Read more of this story at Slashdot.

  • Neil DeGrasse Tyson Urges America To Challenge China To a Space Race
    2015-05-28T17:43:00+00:00
    An anonymous reader writes: According to a Tuesday story in the UK edition of the International Business Times, Neil deGrasse Tyson, the celebrity astrophysicist and media personality, advocates a space race between the United States and China. The idea is that such a race would spur innovation and cause industry to grow. The Apollo race to the moon caused a similar explosive period of scientific research and engineering development. You might prefer the Sydney Morning Herald piece on which the IB Times article is based.

    Read more of this story at Slashdot.

  • Black Hole Plays Pool With Plasma
    2015-05-28T16:57:00+00:00
    the monolith writes: The Hubble Space Telescope is revealing that there is a pool game in progress, with a long shot being played out on a cosmic scale. It appears that the first recorded shot was observed in 1992, while subsequent canon shots were recorded between 1994 an 2014. In actuality, the shots are plasma, the current player is a black hole, and the playing surface is galactic space itself. The BBC has a story on the observations and interpretations, while the journal Nature has the paywalled in-depth article. The current score is unknown, and one can only hope that there were no life forms involved in the collision.

    Read more of this story at Slashdot.

  • How a Scientist Fooled Millions With Bizarre Chocolate Diet Claims
    2015-05-28T16:11:00+00:00
    __roo writes: Did you know chocolate helps you lose weight? You can read all about this great news for chocoholics in the Daily Star, Daily Express, Irish Examiner, and TV shows in Texas and Australia, and even the front page of Bild, Europe's largest daily newspaper. The problem is that it's not true. A researcher who previously worked with Science to do a sting operation on fee-charging open access journals ran a real—but obviously flawed—study rigged to generate false positives, paid €600 to get it published in a fee-charging open access journal, set up a website for a fake institute, and issued press releases to feed the ever-hungry pool of nutrition journalists. The doctor who ran the trial had the idea to use chocolate, because it's a favorite of the "whole food" fanatics. "Bitter chocolate tastes bad, therefore it must be good for you. It's like a religion."

    Read more of this story at Slashdot.

  • A Tool For Analyzing H-1B Visa Applications Reveals Tech Salary Secrets
    2015-05-28T15:28:00+00:00
    Tekla Perry writes: The golden age of engineers is not over,' says a French software engineer who developed a tool for mining U.S. Department of Labor visa application data, but, he says, salaries appear to be leveling off. Indeed, salary inflation for software engineers and other technical professionals at Google and Facebook has slowed dramatically, according to his database, and Airbnb and Dropbox pay is down a little, though Netflix pay is through the roof. The data also shows that some large companies appear to be playing games with titles to deflate salaries, and Microsoft is finally offering technology professionals comparable salaries to Apple and Google. There's a lot more to be discovered in this interactive database, and researchers are getting ready to mine it.

    Read more of this story at Slashdot.

  • How Tesla Batteries Will Force Home Wiring To Go Low Voltage
    2015-05-28T14:47:00+00:00
    CIStud writes with a story at CEPro suggesting that solar power and home batteries like Tesla's PowerWall "will force the reinvention of home wiring from primarily AC high voltage to DC home-run low voltage to reduce power conversion loss," writing "To avoid the 20% to 40% power loss when converting from DC to AC, home wiring will have to convert to home-run low-voltage, and eventually eliminate the need for high-voltage 110V electrical wiring." As a former full-time Airstream dweller, I can attest to the importance of DC appliances when dealing with batteries.

    Read more of this story at Slashdot.

  • New Technique To Develop Single-Molecule Diode
    2015-05-28T13:51:00+00:00
    William Robinson writes: Under the direction of Latha Venkataraman, associate professor of applied physics at Columbia Engineering, researchers have designed a new technique to create a single-molecule diode, that has rectification ratio as high as 250, and 'ON' current as high as 0.1 microamps. The idea of creating a single-molecule diode was suggested by Arieh Aviram and Mark Ratner who theorized in 1974, which has been the 'holy grail' of molecular electronics ever since its inception to achieve further miniaturization, because single molecule represent the limit of miniaturization.

    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