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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 :-)

  • UK Campaign Wants 18-Year-Olds To Be Able To Delete Embarrassing Online Past
    2015-07-29T06:07:00+00:00
    An anonymous reader writes: People should be allowed to delete embarrassing social media posts when they reach adulthood, UK internet rights campaigners are urging. The iRights coalition has set out five rights which young people should expect online, including being able to easily edit or delete content they have created, and to know who is holding or profiting from their information. Highlighting how campaigners believe adults should not have to bear the shame of past immaturity, iRights also wants children to be protected from illegal or distressing pages; to be digitally literate; and be able to make informed and conscious choices.

    Read more of this story at Slashdot.

  • NVIDIA Tegra X1 Performance Exceeds Intel Bay Trail SoCs, AMD AM1 APUs
    2015-07-29T04:06:00+00:00
    An anonymous reader writes: A NVIDIA SHIELD Android TV modified to run Ubuntu Linux is providing interesting data on how NVIDIA's latest "Tegra X1" 64-bit ARM big.LITTLE SoC compares to various Intel/AMD/MIPS systems of varying form factors. Tegra X1 benchmarks on Ubuntu show strong performance with the X1 SoC in this $200 Android TV device, beating out low-power Intel Atom/Celeron Bay Trail SoCs, AMD AM1 APUs, and in some workloads is even getting close to an Intel Core i3 "Broadwell" NUC. The Tegra X1 features Maxwell "GM20B" graphics and the total power consumption is less than 10 Watts.

    Read more of this story at Slashdot.

  • Honeywell Home Controllers Open To Any Hacker Who Can Find Them Online
    2015-07-29T02:00:00+00:00
    Trailrunner7 writes: Security issues continue to crop up within the so-called "smart home." A pair of vulnerabilities have been reported for the Tuxedo Touch controller made by Honeywell, a device that's designed to allow users to control home systems such as security, climate control, lighting, and others. The controller, of course, is accessible from the Internet. Researcher Maxim Rupp discovered that the vulnerabilities could allow an attacker to take arbitrary actions, including unlocking doors or modifying the climate controls in the house.

    Read more of this story at Slashdot.

  • Ask Slashdot: Everyone Building Software -- Is This the Future We Need?
    2015-07-28T23:58:00+00:00
    An anonymous reader writes: I recently stumbled upon Apple's headline for version 2 of its Swift programming language: "Now everyone can build amazing apps." My question: is this what we really need? Tech giants (not just Apple, but Microsoft, Facebook, and more) are encouraging kids and adults to become developers, adding to an already-troubled IT landscape. While many software engineering positions are focused only on a business's internal concerns, many others can dramatically affect other people's lives. People write software for the cars we drive; our finances are in the hands of software, and even the medical industry is replete with new software these days. Poor code here can legitimately mess up somebody's life. Compare this to other high-influence professions: can you become surgeon just because you bought a state-of-art turbo laser knife? Of course not. Back to Swift: the app ecosystem is already chaotic, without solid quality control and responsibility from most developers. If you want simple to-do app, you'll get never-ending list of software artifacts that will drain your battery, eat memory, freeze the OS and disappoint you in every possible way. So, should we really be focusing on quantity, rather than quality?

    Read more of this story at Slashdot.

  • Advertising Companies Accused of Deliberately Slowing Page-load Times For Profit
    2015-07-28T23:10:00+00:00
    An anonymous reader writes: An industry insider has told Business Insider of his conviction that ad-serving companies deliberately prolong the 'auctioning' process for ad spots when a web-page loads. They do this to maximize revenue by allowing automated 'late-comers' to participate beyond the 100ms limit placed on the decision-making process. The unnamed source, a principal engineer at a global news company (whose identity and credentials were confirmed by Business Insider), concluded with the comment: "My entire team of devs and testers mostly used Adblock when developing sites, just because it was so painful otherwise." Publishers use 'daisy-chaining' to solicit bids from the most profitable placement providers down to the 'B-list' placements, and the longer the process is run, the more likely that the web-page will be shown with profitable advertising in place.

    Read more of this story at Slashdot.

  • Amazon Proposes Dedicated Airspace For Drones
    2015-07-28T22:24:00+00:00
    An anonymous reader writes: Amazon has published two new position papers which lay out its vision for future drone regulation. Under Amazon's plan, altitudes under 200ft would be reserved for basic hobbyist drones and those used for things like videography and inspection. Altitudes between 200ft and 400ft would be designated for "well-equipped vehicles" capable of operating autonomously out of line of sight. They would need sophisticated GPS tracking, a stable data uplink, communications capabilities with other drones, and sensors to avoid collisions. This, of course, is where Amazon would want to operate its drone delivery fleet. From 400ft to 500ft would be a no-fly zone buffer between the drone airspace and integrated airspace. Amazon's plan also makes room for "predefined low-risk areas," where hobbyists and other low-tech drones can fly higher than the 200ft ceiling. "Additionally, it is Amazon's view that air traffic management operations should follow a 'managed by exception' approach. This means operators are always aware of what the fleet is doing, yet they only intervene in significant off-nominal cases."

    Read more of this story at Slashdot.

  • Poor Pilot Training Blamed For Virgin Galactic Crash
    2015-07-28T21:42:00+00:00
    astroengine writes: SpaceShipTwo co-pilot Michael Alsbury was not properly trained to realize the consequences of unlocking the vehicle's hinged tail section too soon, a mistake that led to his death and the destruction of the ship during a test flight in California last year. Responsibility for the accident falls to SpaceShipTwo manufacturer Scaled Composites, a Mojave, Calif., company owned by Northrop Grumman Corp, the National Transportation Safety Board (NTSB) determined at a webcast hearing on Tuesday (PDF). Poor oversight by the Federal Aviation Administration, which oversees commercial spaceflights in the United States, was also a factor in the accident, the NTSB said.

    Read more of this story at Slashdot.

  • Scientists Identify Possible New Substance With Highest Melting Point
    2015-07-28T21:00:00+00:00
    JoshuaZ writes: Researchers from Brown University have tentatively identified an alloy of hafnium, nitrogen and carbon as having an expected melting point of about 7,460 degrees Fahrenheit (4120 Celsius). This exceeds that of the previous record-breaker, tantalum hafnium carbide, which melts at 7,128 F (3942 C). Its record stood for almost a century. At this point, the new alloy is still hypothetical, based on simulations, so the new record has not yet been confirmed by experiment. The study was published in Physical Review B (abstract), and a lay-summary is available at the Washington Post. If the simulations turn out to be correct, the new alloy may be useful in parts like jet engines, and the door will be opened to using similar simulations to search for substances with even higher melting points or with other exotic properties.

    Read more of this story at Slashdot.

  • Veteran IT Journalist Worries That Online Privacy May Not Exist (Video)
    2015-07-28T20:17:00+00:00
    Tom Henderson is a long-time observer of the IT scene, complete with scowl and grey goatee. And cynicism. Tom is a world-class cynic, no doubt about it. Why? Cover enterprise IT security and other computing topics long enough for big-time industry publications like ITWorld and its IDG brethren, and you too may start to think that no matter what you do, your systems will always have (virtual) welcome mats in front of them, inviting crackers to come in and have a high old time with your data. Note: Alert readers have probably noticed that we talked with Tom about cloud security back in March. Another good interview, worth seeing (or reading).

    Read more of this story at Slashdot.

  • Intel and Micron Unveil 3D XPoint Memory, 1000x Speed and Endurance Over Flash
    2015-07-28T19:37:00+00:00
    MojoKid writes: Today at a press conference in San Francisco, Intel and Micron unveiled 3D XPoint (Cross Point) memory technology, a non-volatile memory architecture they claim could change the landscape of consumer electronics and computer architectures for years to come. Intel and Micron say 3D XPoint memory is 1000 times faster than NAND, boasts 1000x the endurance of NAND, and offers 8-10 times the density of conventional memory. 3D XPoint isn't electron based, it's material based. The companies aren't diving into specifics yet surrounding the materials used in 3D XPoint, but the physics are fundamentally different than what we're used to. It's 3D stackable and its cross point connect structure allows for dense packing and individual access at the cell level from the top or bottom of a memory array. Better still, Intel alluded to 3D XPoint not being as cost-prohibitive as you might expect. Intel's Rob Crooke explained, "You could put the cost somewhere between NAND and DRAM." Products with the new memory are expected to arrive in 2016 and the joint venture is in production with wafers now.

    Read more of this story at Slashdot.

  • DHI Group Inc. Announces Plans to Sell Slashdot Media
    2015-07-28T18:55:00+00:00
    An anonymous reader writes: DHI Group Inc. (formerly known as Dice Holdings Inc.) announced plans to sell Slashdot Media (slashdot.org & sourceforge.net) in their Q2 financial report. This is being reported by multiple sources. Editor's note: Yep, looks like we're being sold again. We'll keep you folks updated, but for now I don't have any more information than is contained in the press release. Business as usual until we find a buyer (and hopefully after). The company prepared a statement for our blog as well — feel free to discuss the news here, there, or in both places.

    Read more of this story at Slashdot.

  • Two Years Later, White House Responds To 'Pardon Edward Snowden' Petition
    2015-07-28T18:12:00+00:00
    An anonymous reader writes: In June of 2013, a petition was posted to Whitehouse.gov demanding that Edward Snowden receive a full pardon for his leaks about the NSA and U.S. surveillance practices. The petition swiftly passed 100,000 signatures — the point at which the White House said it would officially respond to such petitions. For two years, the administration was silent, but now they've finally responded. In short: No, Edward Snowden won't be receiving a pardon. Lisa Monaco, the President's Advisor on Homeland Security and Counterterrorism, said, "Mr. Snowden's dangerous decision to steal and disclose classified information had severe consequences for the security of our country and the people who work day in and day out to protect it. If he felt his actions were consistent with civil disobedience, then he should do what those who have taken issue with their own government do: Challenge it, speak out, engage in a constructive act of protest, and — importantly — accept the consequences of his actions. He should come home to the United States, and be judged by a jury of his peers — not hide behind the cover of an authoritarian regime. Right now, he's running away from the consequences of his actions."

    Read more of this story at Slashdot.

  • Interviews: Dr. Temple Grandin Answers Your Questions
    2015-07-28T17:30:00+00:00
    Recently you had a chance to ask animal behavior expert and autism advocate Dr. Temple Grandin a question. Below you'll find her answers about factory farming, animal behavior, and living with autism.

    Read more of this story at Slashdot.

  • Newegg Beats Patent Troll Over SSL and RC4 Encryption
    2015-07-28T16:49:00+00:00
    New submitter codguy writes to note that a few days ago, and after a previous failed attempt to fight patent troll TQP Development in late 2013, Newegg has now beaten this troll in a rematch. From the linked post: "Newegg went against a company that claimed its patent covered SSL and RC4 encryption, a common encryption system used by many retailers and websites. This particular patent troll has gone against over 100 other companies, and brought in $45 million in settlements before going after Newegg." This follows on Intuit's recent success in defending itself against this claim.

    Read more of this story at Slashdot.

  • .NET 4.6 Optimizer Bug Causes Methods To Get Wrong Parameters
    2015-07-28T16:10:00+00:00
    tobiasly writes: A serious bug in the just-released .NET 4.6 runtime causes the JIT compiler to generate incorrectly-optimized code which results in methods getting called with different parameters than what were passed in. Nick Craver of Stack Exchange has an excellent write-up of the technical details and temporary workarounds; Microsoft has acknowledged the problem and submitted an as-yet unreleased patch. This problem is compounded by Microsoft's policy of replacing the existing .NET runtime, as opposed to the side-by-side runtimes which were possible until .NET 2.0. This means that even if your project targets .NET 4.5, it will get the 4.6 runtime if it was installed on that machine. Since it's not possible to install the just-released Visual Studio 2015 without .NET 4.6, this means developers must make the difficult choice between using the latest tools or risking crippling bugs such as this one.

    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