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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 :-)

  • The App Economy Will Be Worth $6 Trillion in Five Years
    2017-06-27T20:00:00+00:00
    An anonymous reader shares a report: In five years, the app economy will be worth $6.3 trillion, up from $1.3 trillion last year, according to a report released today by app measurement company App Annie. What explains the growth? More people are spending more time and -- crucially -- more money in apps. While on average people aren't downloading many more apps, App Annie expects global app usership to nearly double to 6.3 billion people in the next five years while the time spent in apps will more than double. And, it expects the average app spend -- including app-store purchases, advertising spend and, most importantly, commerce -- to increase from $379 per person to $1,008 in 2021. The 800-pound -- or $6 trillion -- gorilla in the room is mobile commerce.

    Read more of this story at Slashdot.

  • Heritage Valley Health System Target Of Cyber Attack
    2017-06-27T19:20:00+00:00
    The Heritage Valley Health System says it has been hit with a cyber attack. From a report: A spokeswoman confirmed the attack Tuesday morning. "Heritage Valley Health System has been affected by a cyber security incident. The incident is widespread and is affecting the entire health system including satellite and community locations. We have implemented downtime procedures and made operational adjustments to ensure safe patient care continues un-impeded." Heritage Valley is a $480 million network that provides care for residents of Allegheny, Beaver, Butler and Lawrence counties, in Pennsylvania; parts of eastern Ohio; and the panhandle of West Virginia. Also read: Ukrainian Banks, Electricity Firm Hit by Fresh Cyber Attack; Reports Claim the Ransomware Is Quickly Spreading Across the World.

    Read more of this story at Slashdot.

  • Facebook Crosses 2 Billion Monthly Users
    2017-06-27T18:40:00+00:00
    Facebook has announced that it now has over 2 billion monthly active users. From a report: That's up from the 1.94 billion total that the company cited as part of its most recent earnings report in May. Mark Zuckerberg shared the news directly, and Fast Company has a story on Facebook's constant efforts to keep pushing growth upward. "It's an honor to be on this journey with you," Zuckerberg wrote. Facebook's other apps are faring well, too: Messenger has over 1.2 billion monthly users and Facebook-owned WhatsApp tallies a similar figure. Twitter, by comparison, has 328 million monthly active users. Instagram has over 700 million.

    Read more of this story at Slashdot.

  • Volvo's Driverless Cars 'Confused' by Kangaroos
    2017-06-27T18:00:00+00:00
    An anonymous reader shares a report: Volvo's self-driving technology is struggling to identify kangaroos in the road. The Swedish car-maker's 2017 S90 and XC90 models use its Large Animal Detection system to monitor the road for deer, elk and caribou. But the way kangaroos move confuses it. "We've noticed with the kangaroo being in mid-flight when it's in the air, it actually looks like it's further away, then it lands and it looks closer," its Australia technical manager said. But the problem would not delay the rollout of driverless cars in the country, David Pickett added.

    Read more of this story at Slashdot.

  • China's All-Seeing Surveillance State Is Reading Its Citizens' Faces
    2017-06-27T17:20:00+00:00
    China's government is using facial-recognition technology to help promote good behavior and catch lawbreakers, reports the WSJ. From the article: Facial-recognition technology, once a specter of dystopian science fiction, is becoming a feature of daily life in China, where authorities are using it on streets, in subway stations, at airports and at border crossings in a vast experiment in social engineering (alternative source). Their goal: to influence behavior and identify lawbreakers. Ms. Gan, 31 years old, had been caught on camera crossing illegally here once before, allowing the system to match her two images. Text displayed on the crosswalk screens identified her as a repeat offender. "I won't ever run a red light again," she said. China is rushing to deploy new technologies to monitor its people in ways that would spook many in the U.S. and the West. Unfettered by privacy concerns or public debate, Beijing's authoritarian leaders are installing iris scanners at security checkpoints in troubled regions and using sophisticated software to monitor ramblings on social media. By 2020, the government hopes to implement a national "social credit" system that would assign every citizen a rating based on how they behave at work, in public venues and in their financial dealings.

    Read more of this story at Slashdot.

  • Samsung To Launch Refurbished Galaxy Note 7 in South Korea On July 7
    2017-06-27T16:40:00+00:00
    South Korean news agency Yonhap reports: Samsung plans to release the refurbished edition of the ill-fated Galaxy Note 7 smartphone next month, industry sources said Tuesday. According to the sources, Samsung will release the smartphone under the name the Galaxy Note FE, with a price tag below 700,000 won (US$616). Official sales are slated to start July 7. The South Korean tech giant suspended production and sales of the Galaxy Note 7 last year amid reports that some of the devices caught fire while charging. A probe revealed that the problems were due to the non-removable battery. Accordingly, the refurbished devices will have a smaller battery capacity than the originals, along with the latest software updates.

    Read more of this story at Slashdot.

  • Short of IT Workers At Home, Israeli Startups Recruit Elsewhere
    2017-06-27T16:00:00+00:00
    New submitter Alex Wilson shares a Reuters report: Driven by startups, Israel's technology industry is the fastest growing part of the economy. It accounts for 14 percent of economic output and 50 percent of exports. But a shortage of workers means its position at the cutting edge of global technology is at risk, with consequences for the economy and employment. When Alexey Chalimov founded software design firm Eastern Peak in Israel four years ago he knew he would not find the developers he needed at home. He went to Ukraine and hired 120 people to develop mobile apps and web platforms for international clients and smaller Israeli startups. "I worked for years in the Israeli market and I knew what the costs were in Israel and I knew there was a shortage of workers," he told Reuters. The government's Innovation Authority forecasts a shortage of 10,000 engineers and programmers over the next decade in a market that employs 140,000. Israel has dropped six spots in three years to 17th in the World Economic Forum's ranking of the ease of finding skilled technology employees. In the meantime, many Israeli startups are looking abroad.

    Read more of this story at Slashdot.

  • The New iPad Pro Review
    2017-06-27T15:20:00+00:00
    An anonymous reader writes: As tech reviewers across the United States and Europe sing praises of Apple's new iPad Pro, here's what Joshua Topolsky, former editor-in-chief of The Verge and Engadget (and now with The Outline) had to say: "It [10.5-inch iPad Pro] is inferior to a laptop in almost every way, unless you like to draw. If you think you can replace you laptop with this setup: you cannot. Imagine a computer, but everything works worse than you expect. That is the new iPad. Now, I know the software is in beta, but I also know how Apple betas work. They don't massively change. I have no doubt it's a very powerful piece of hardware, and the screen is gorgeous. Garageband is a lot of fun to play with. But this doesn't COME CLOSE to replacing your laptop, even for simple things you do, like email. AND one other thing. Apple's keyboard cover is a fucking atrocity. A terrible piece of hardware. Awkward to use, poor as a cover. Okay in a pinch if you need something LIKE a keyboard. Anyhow good to know there are still Apple fanboys who get mad if you insult their products. But I don't think it's a very good product. Finally, iOS 11 is definitely a STEP in the right direction. But guys the iPad has been around forever and it still feels half-assed. I think a lot of people are willing to contort themselves around a bad UX because marketing is powerful."

    Read more of this story at Slashdot.

  • Ukrainian Banks, Electricity Firm Hit by Fresh Cyber Attack; Reports Claim the Ransomware Is Quickly Spreading Across the World
    2017-06-27T14:34:00+00:00
    A massive cyber attack has disrupted businesses and services in Ukraine on Tuesday, bringing down the government's website and sparking officials to warn that airline flights to and from the country's capital city Kiev could face delays. Motherboard reports that the ransomware is quickly spreading across the world. From a report: A number of Ukrainian banks and companies, including the state power distributor, were hit by a cyber attack on Tuesday that disrupted some operations (a non-paywalled source), the Ukrainian central bank said. The latest disruptions follow a spate of hacking attempts on state websites in late-2016 and repeated attacks on Ukraine's power grid that prompted security chiefs to call for improved cyber defences. The central bank said an "unknown virus" was to blame for the latest attacks, but did not give further details or say which banks and firms had been affected. "As a result of these cyber attacks these banks are having difficulties with client services and carrying out banking operations," the central bank said in a statement. BBC reports that Ukraine's aircraft manufacturer Antonov, two postal services, Russian oil producer Rosneft and Danish shipping company Maersk are also facing "disruption, including its offices in the UK and Ireland." According to local media reports, the "unknown virus" cited above is a ransomware strain known as Petya.A. Here's how Petya encrypts files on a system (video). News outlet Motherboard reports that Petya has hit targets in Spain, France, Ukraine, Russia, and other countries as well. From the report: "We are seeing several thousands of infection attempts at the moment, comparable in size to Wannacry's first hours," Costin Raiu, a security researcher at Kaspersky Lab, told Motherboard in an online chat. Judging by photos posted to Twitter and images provided by sources, many of the alleged attacks involved a piece of ransomware that displays red text on a black background, and demands $300 worth of bitcoin. "If you see this text, then your files are no longer accessible, because they are encrypted," the text reads, according to one of the photos. "Perhaps you are busy looking for a way to recover your files, but don't waste your time. Nobody can recover your files without our decryption service."

    Read more of this story at Slashdot.

  • Google Slapped With $2.7 Billion By EU For Skewing Searches
    2017-06-27T14:00:00+00:00
    Google suffered a major regulatory blow on Tuesday after European antitrust officials fined the search giant 2.4 billion euros, or $2.7 billion, for unfairly favoring some of its own search services over those of rivals. The European Commission concluded that the search giant abused its near-monopoly in online search to "give illegal advantage" to its own Shopping service. Margrethe Vestager, the EU's competition commissioner, said Google "denied other companies the chance to compete" and left consumers without "genuine choice." The hefty fine marks the latest chapter in a lengthy standoff between Europe and Google, which also faces two separate charges under the region's competition rules related to Android, its popular mobile software, and to some of its advertising products. From a report: Google has 90 days to "stop its illegal conduct" and give equal treatment to rival price-comparison services, according to a binding order from the European Commission on Tuesday. It's up to Google to choose how it does this and it must tell the EU within 60 days of its plans. Failure to comply brings a risk of fines of up to 5 percent of its daily revenue. [...] "I expect the Commission now to swiftly conclude the other two ongoing investigations against Google," Markus Ferber, a member of the European Parliament from Germany. "Unfortunately, the Google case also illustrates that competition cases tend to drag on for far too long before they are eventually resolved. In a fast-moving digital economy this means often enough that market abuse actually pays off and the abuser succeeds in eliminating the competition." Google has been pushing its own comparison shopping service since 2008, systematically giving it prominent placement when people search for an item, the EU said. Rival comparison sites usually only appear on page four of search results, effectively denying them a massive audience as the first page attracts 95 percent of all clicks. In a blog post, Google said the EU has "underestimated" the value Google's services brings to the table. "We believe the European Commission's online shopping decision underestimates the value of those kinds of fast and easy connections. While some comparison shopping sites naturally want Google to show them more prominently, our data show that people usually prefer links that take them directly to the products they want, not to websites where they have to repeat their searches. We think our current shopping results are useful and are a much-improved version of the text-only ads we showed a decade ago. Showing ads that include pictures, ratings, and prices benefits us, our advertisers, and most of all, our users. And we show them only when your feedback tells us they are relevant. Thousands of European merchants use these ads to compete with larger companies like Amazon and eBay. [...] Given the evidence, we respectfully disagree with the conclusions announced today. We will review the Commission's decision in detail as we consider an appeal, and we look forward to continuing to make our case," wrote Kent Walker, SVP and General Counsel at Google.

    Read more of this story at Slashdot.

  • Amazon Robots Poised To Revamp How Whole Foods Runs Warehouses
    2017-06-27T13:00:00+00:00
    After Amazon announced it would buy Whole Foods Market for $13.7 billion earlier this month, John Mackey, Whole Foods' chief executive officer, rejoiced and reportedly gushed about Amazon's technological innovation. "We will be joining a company that's visionary," Mackey said. "I think we're gonna get a lot of those innovations in our stores. I think we're gonna see a lot of technology. I think you're gonna see Whole Foods Market evolve in leaps and bounds." Specifically, Mackey is talking about the thousands of delivery robots Amazon uses in its facilities. Bloomberg reports: In negotiations, Amazon spent a lot of time analyzing Whole Foods' distribution technology, pointing to a possible way in which the company sees the most immediate opportunities to reduce costs, said a person familiar with the matter who asked not to be identified because the issue was private. Experts say the most immediate changes would likely be in warehouses that customers never see. That suggests the jobs that could be affected the earliest would be in the warehouses, where products from suppliers await transport to store shelves, said Gary Hawkins, CEO of the Center for Advancing Retail and Technology, a Los Angeles nonprofit that helps retailers and brands innovate. As Amazon looks to automate distribution, cashiers will be safe -- for now. Amazon sees automation as a key strategic advantage in its overall grocery strategy, according to company documents reviewed by Bloomberg before the Whole Foods acquisition was announced. Whole Foods has 11 distribution centers specializing in perishable foods that serve its stores. It also has seafood processing plants, kitchens and bakeries that supply prepared food to each location. Those are the places where Amazon could initially focus, according to experts. While the company said it has no current plans to automate the jobs of cashiers in Whole Foods stores after it finishes acquiring the grocery chain, it's likely only a matter of time before cashier positions become automated. According to Bloomberg's report, Amazon may bring the robots to the stores after automating Whole Foods' warehouses. "The first ones will likely navigate aisles to check inventory and alert employees when items run low, said Austin Bohlig, an advisor at Loup Ventures, which invests in robotics startups," reports Bloomberg.

    Read more of this story at Slashdot.

  • New Study Confirms the Oceans Are Warming Rapidly
    2017-06-27T10:00:00+00:00
    An anonymous reader shares a report from The Guardian, written by John Abraham, who discusses the rising ocean temperatures and the important factors that affect ocean-temperature accuracy: The most important measurement of global warming is in the oceans. In fact, "global warming" is really "ocean warming." If you are going to measure the changing climate of the oceans, you need to have many sensors spread out across the globe that take measurements from the ocean surface to the very depths of the waters. Importantly, you need to have measurements that span decades so a long-term trend can be established. These difficulties are tackled by oceanographers, and a significant advancement was presented in a paper just published in the journal Climate Dynamics. That paper, which I was fortunate to be involved with, looked at three different ocean temperature measurements made by three different groups. We found that regardless of whose data was used or where the data was gathered, the oceans are warming. In the paper, we describe perhaps the three most important factors that affect ocean-temperature accuracy. First, sensors can have biases (they can be "hot" or "cold"), and these biases can change over time. Another source of uncertainty is related to the fact that we just don't have sensors at all ocean locations and at all times. Some sensors, which are dropped from cargo ships, are densely located along major shipping routes. Other sensors, dropped from research vessels, are also confined to specific locations across the globe. Finally, temperatures are usually referenced to a baseline "climatology." So, when we say temperatures have increased by 1 degree, it is important to say what the baseline climatology is. Have temperatures increased by 1 degree since the year 1990? Since the year 1970? Since 1900? The choice of baseline climatology really matters.

    Read more of this story at Slashdot.

  • Physicists Have Created the Brightest Light Ever Recorded
    2017-06-27T07:00:00+00:00
    Jason Koebler writes: A group of physicists at the University of Nebraska-Lincoln's Extreme Light Laboratory announced Monday that they have created the brightest light ever produced on Earth using Diocles, one of the most powerful lasers in the United States. When this high intensity laser pulse, which is one billion times brighter than the surface of the sun, strikes the electron, it causes it to behave differently. By firing this laser at individual electrons, the researchers found that past a certain threshold, the brightness of light will actually change an object's appearance rather than simply making it brighter. The x-rays that are produced in this fashion have an extremely high amount of energy, and Umstadter and his colleagues think this could end up being applied in a number of ways. For starters, it could allow doctors to produce x-ray medical images on the nanoscale, which would allow them to detect tumors and other anomalies that regular x-rays might have missed. Moreover, it could also be used for more sophisticated x-ray scanning at airports and other security checkpoints.

    Read more of this story at Slashdot.

  • Social Media Giants Step Up Joint Fight Against Extremist Content
    2017-06-27T03:33:00+00:00
    Social media giants Facebook, Google's YouTube, Twitter and Microsoft said on Monday they were forming a global working group to combine their efforts to remove terrorist content from their platforms. From a report: Responding to pressure from governments in Europe and the United States after a spate of militant attacks, the companies said they would share technical solutions for removing terrorist content, commission research to inform their counter-speech efforts and work more with counter-terrorism experts. The Global Internet Forum to Counter Terrorism "will formalize and structure existing and future areas of collaboration between our companies and foster cooperation with smaller tech companies, civil society groups and academics, governments and supra-national bodies such as the EU and the UN," the companies said in a statement.

    Read more of this story at Slashdot.

  • New Study Explains Why Trump's 'Sad' Tweets Are So Effective
    2017-06-27T02:05:00+00:00
    An anonymous reader quotes a report from The Verge: During his campaign and presidency, Donald Trump has used Twitter to circumvent traditional media broadcasters and speak directly to the masses. He is particularly known for one specific tweet construction: he sets up a situation that he feels should inspire anger or outrage, then punctuates it with "Sad!" New research from New York University suggests a reason why this style is so effective: a tweet containing moral and emotional language spreads farther among people with similar political persuasion. The study offered up "duty" as an example of a purely moral word, "fear" as a purely emotional one, and "hate" as word that combined the two categories. The research found that the use of purely moral or purely emotional language had a limited impact on the spread of a tweet, but the "presence of moral-emotional words in messages increased their diffusion by a factor of 20% for each additional word." The impact of this language cut both ways. Tweets with moral-emotional words spread further among those with a similar political outlook, and they spread less with those who held opposing views, according to the research published in the journal PNAS. The study looked at 563,312 tweets on the topics of gun control, same-sex marriage, and climate change, and rated their impact by the number of retweets each one received.

    Read more of this story at Slashdot.

 

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Mathematics Department
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