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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
Attitude is half reality.
    --- me?
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 :-)

  • Facebook's Photorealistic Simulator For AI Runs At 10,000 FPS
    2019-06-16T14:34:00+00:00
    malachiorion writes: Facebook just open sourced a simulator for testing and training embodied AI systems -- like virtual robots. They worked with AR/VR researchers to release the simulator along with what they say are the most photorealistic 3D reconstructions of real world places available. [Facebook Reality Labs have named this "the Replica data set".] The crazy part: Because more frames are always better for training computer vision in simulators, it can run at 10,000 FPS! The simulator's ability to hit 10K frames per second prompted an interesting follow-up on the original submission. "It's a totally useless framerate for humans -- just absolute overkill for our brains/eyeballs -- but it's apparently a benefit for AI systems." "As more researchers adopt the platform, we can collectively develop embodied AI techniques more quickly," explains Facebook's blog post, "as well as realize the larger benefits of replacing yesterday's training data sets with active environments that better reflect the world we're preparing machine assistants to operate in." And if you're worried about privacy, Facebook assures readers that "The data used to generate Replica scans was anonymized to remove any personal details (such as family photos) that could identify an individual. The overall reconstruction process was meticulous, with researchers manually filling in the small holes that are inevitably missed during scanning and using a 3D paint tool to apply annotations directly onto meshes."

    Read more of this story at Slashdot.

  • Uber's Plan To Deliver McDonald's Hamburgers By Drone
    2019-06-16T13:34:00+00:00
    An anonymous reader quotes the Washington Post: The company's new initiative -- a collaborative effort between its Uber Eats and Uber Elevate divisions -- began with tests in San Diego using fast food meals from McDonald's, but could expand to include a local fine-dining restaurant called Juniper and Ivy, the company said. Uber intends to roll out commercial food delivery using drones in the same city this summer, with a fee structure that mimics Uber Eats current pricing, according to Bloomberg Businessweek, which first reported the company's plan... "We've been working closely with the FAA to ensure that we're meeting requirements and prioritizing safety," Uber Elevate's Luke Fischer, the company's head of flight operations, said in a statement. "From there, our goal is to expand Uber Eats drone delivery so we can provide more options to more people at the tap of a button. We believe that Uber is uniquely positioned to take on this challenge as we're able to leverage the Uber Eats network of restaurant partners and delivery partners as well as the aviation experience and technology of Uber Elevate." How will Uber's drone delivery service work? After a restaurant loads a meal into a drone and the robot takes to the air, the company's technology will notify a nearby Uber Eats driver at a designated drop-off location, the company said. The driver will pick up and hand deliver the meal to the customer the same way the service currently operates. But in the future, Uber said, the company would like to land drones atop parked vehicles near delivery locations "through QR code correspondence." Once that happens, the last-mile leg of delivery would be completed by the Uber Eats driver who would hand-deliver the order.

    Read more of this story at Slashdot.

  • Do Google and Facebook Threaten Our 'Ambient Privacy'?
    2019-06-16T11:34:00+00:00
    This week Pinboard founder Maciej Ceglowski (also a web developer and social critic) asked readers of his blog to consider an emerging threat to ambient privacy. He defines it as "the understanding that there is value in having our everyday interactions with one another remain outside the reach of monitoring, and that the small details of our daily lives should pass by unremembered." Until recently, ambient privacy was a simple fact of life. Recording something for posterity required making special arrangements, and most of our shared experience of the past was filtered through the attenuating haze of human memory. Even police states like East Germany, where one in seven citizens was an informer, were not able to keep tabs on their entire population. Today computers have given us that power. Authoritarian states like China and Saudi Arabia are using this newfound capacity as a tool of social control. Here in the United States, we're using it to show ads. But the infrastructure of total surveillance is everywhere the same, and everywhere being deployed at scale.... Because our laws frame privacy as an individual right, we don't have a mechanism for deciding whether we want to live in a surveillance society. Congress has remained silent on the matter, with both parties content to watch Silicon Valley make up its own rules. The large tech companies point to our willing use of their services as proof that people don't really care about their privacy. But this is like arguing that inmates are happy to be in jail because they use the prison library. Confronted with the reality of a monitored world, people make the rational decision to make the best of it. That is not consent... Our discourse around privacy needs to expand to address foundational questions about the role of automation: To what extent is living in a surveillance-saturated world compatible with pluralism and democracy? What are the consequences of raising a generation of children whose every action feeds into a corporate database? What does it mean to be manipulated from an early age by machine learning algorithms that adaptively learn to shape our behavior? That is not the conversation Facebook or Google want us to have. Their totalizing vision is of a world with no ambient privacy and strong data protections, dominated by the few companies that can manage to hoard information at a planetary scale. They correctly see the new round of privacy laws as a weapon to deploy against smaller rivals, further consolidating their control over the algorithmic panopticon.

    Read more of this story at Slashdot.

  • 'How Close Are We to Self-Driving Cars, Really?'
    2019-06-16T07:34:00+00:00
    Chris Urmson helped pioneer self-driving car technology at Google before founding Aurora (which sells self-driving car software to automakers, and this week announced a new partnership with Chrysler and a new round of investment by Hyundai). In a new interview, Urmson "says he expects that in about five to 10 years, Americans will start seeing robots cruising down the road in a handful of cities and towns across the country," reports Slate. "It will be about 30 to 50 years, he says, until they're everywhere. " I think within the next five years we'll see small-scale deployment. That'll be a few hundred or a few thousand vehicles. Really this is the, it's Silicon Valley speak, this is the zero-to-one moment of proving that the technology actually works, understanding how customers want to use it, convincing ourselves that -- and when I say ourselves, I mean as a society -- that these are sufficiently safe, that we trust them on the roadway, and that's that first phase... [W]hen the technology actually starts to become scaled, then we can ask the question what have we learned, what are the ways that we can make this a little bit safer, a little bit incrementally more efficient, and that's what I think local and state governments and federal government would invest in infrastructure... The statistic I heard was 30 percent of traffic in San Francisco is people looking for parking. I heard a more alarming statistic that was 80 percent of traffic in Paris was people looking for parking. So imagine you have automated vehicles that take you to a location, you hop out, then it just drives down the block and picks up the next person and takes them where they're going. Suddenly, you've alleviated a massive chunk of the congestion in a city. Similarly, if you look at the floor plan of a city today, somewhere between 30â"40 percent of cities is dedicated to parking and roads. And so again, if you have automated vehicles operating as a transportation service, whether it's private or public transportation networks in the city, you don't need that real estate to be dedicated for parking. That real estate now can be recaptured, and it can be used for park space, it can be used for residential space, yeah, it can be used for mixed residential-commercial office space... Certainly for urban centers, I think it's much more likely that this technology is a shared platform that people get on and get off. It's an even more convenient version of a bus or of a taxi service.

    Read more of this story at Slashdot.

  • Security Cameras + AI = Dawn of Non-Stop Robot Surveillance
    2019-06-16T04:34:00+00:00
    AmiMoJo shared this post from one of the ACLU's senior technology policy analysts about what happens when security cameras get AI upgrades: [I]magine that all that video were being watched -- that millions of security guards were monitoring them all 24/7. Imagine this army is made up of guards who don't need to be paid, who never get bored, who never sleep, who never miss a detail, and who have total recall for everything they've seen. Such an army of watchers could scrutinize every person they see for signs of "suspicious" behavior. With unlimited time and attention, they could also record details about all of the people they see -- their clothing, their expressions and emotions, their body language, the people they are with and how they relate to them, and their every activity and motion... The guards won't be human, of course -- they'll be AI agents. Today we're publishing a report on a $3.2 billion industry building a technology known as "video analytics," which is starting to augment surveillance cameras around the world and has the potential to turn them into just that kind of nightmarish army of unblinking watchers.... Many or most of these technologies will be somewhere between unreliable and utterly bogus. Based on experience, however, that often won't stop them from being deployed -- and from hurting innocent people... We are still in the early days of a revolution in computer vision, and we don't know how AI will progress, but we need to keep in mind that progress in artificial intelligence may end up being extremely rapid. We could, in the not-so-distant future, end up living under armies of computerized watchers with intelligence at or near human levels. These AI watchers, if unchecked, are likely to proliferate in American life until they number in the billions, representing an extension of corporate and bureaucratic power into the tendrils of our lives, watching over each of us and constantly shaping our behavior... Policymakers must contend with this technology's enormous power. They should prohibit its use for mass surveillance, narrow its deployments, and create rules to minimize abuse. They argue that the threat is just starting to emerge. "It is as if a great surveillance machine has been growing up around us, but largely dumb and inert -- and is now, in a meaningful sense, 'waking up.'"

    Read more of this story at Slashdot.

  • Are Open Source Developers Being Underfunded and Exploited?
    2019-06-16T01:34:00+00:00
    Donation-based open source programmer Andre Staltz recently collected data from GitHub, Patreon, and OpenCollective to try to calculate how much money is being donated to popular projects. The results? Out of 58 projects checked, "there were two clearly sustainable open source projects, but the majority (more than 80%) of projects that we usually consider sustainable are actually receiving income below industry standards or even below the poverty threshold." More than 50% of projects are red: they cannot sustain their maintainers above the poverty line. 31% of the projects are orange, consisting of developers willing to work for a salary that would be considered unacceptable in our industry. 12% are green, and only 3% are blue: Webpack and Vue.js... The median donation per year is $217, which is substantial when understood on an individual level, but in reality includes sponsorship from companies that are doing this also for their own marketing purposes... The total amount of money being put into open source is not enough for all the maintainers. If we add up all of the yearly revenue from those projects in this data set, it's $2.5 million. The median salary is approximately $9k, which is below the poverty line. If split up that money evenly, that's roughly $22k, which is still below industry standards. The core problem is not that open source projects are not sharing the money received. The problem is that, in total numbers, open source is not getting enough money... GitHub was bought by Microsoft for $7.5 billion. To make that quantity easier to grok, the amount of money Microsoft paid to acquire GitHub -- the company -- is more than 3000x what the open source community is getting yearly. In other words, if the open source community saved up every penny of the money they ever received, after a couple thousand years they could perhaps have enough money to buy GitHub jointly... If Microsoft GitHub is serious about helping fund open source, they should put their money where their mouth is: donate at least $1 billion to open source projects. Even a mere $1.5 million per year would be enough to make all the projects in this study become green. The article suggests concrete actions to stop this "exploitation," including donating to open source projects, as well as more scrutiny of how well open source projects are funded, and "pressuring Microsoft to donate millions to open source projects." It also suggests considering alternative licenses for new projects, and unionizing. But Chris Aniszczyk, the CTO of the Cloud Native Computing Foundation, responded on Twitter that the donation-based approach is "a path to ruin for sustainability... you solve this problem by having companies hire folks or help maintainers build businesses around their projects... let's not turn open source into a gig economy and demand more of companies instead." So what do Slashdot's readers think? Are open source developers being underfunded and exploited? And if so -- what's the solution?

    Read more of this story at Slashdot.

  • News Industry Argues Google and Facebook 'Rob Journalism of Its Revenue', Seek Government Help
    2019-06-15T23:34:00+00:00
    This week USA Today's former editor-in-chief argued that "Tech overlords Google and Facebook have used monopoly to rob journalism of its revenue," in an op-ed shared by schwit1: Over the past decade, the news business has endured a bloodbath, with tens of thousands of journalists losing their jobs amid mass layoffs. The irony is, more people than ever are consuming news... Why the disconnect? Look no further than a new study by the News Media Alliance, which found that in 2018, Google made $4.7 billion off of news content -- almost as much as every news organization in America combined made from digital ads last year. Yet Google paid a grand total of zero for the privilege. News industry revenue, meanwhile, has plunged... Google and Facebook command about 60% of all U.S. digital advertising revenue, and have siphoned off billions of dollars that once were the lifeblood of the news media. Let's be perfectly clear: Journalism's primary revenue source has been hijacked. It's time that news providers are compensated for the journalism they produce. That's why passage of the bipartisan Journalism Competition and Preservation Act is crucial... Toward that end, "News industry officials, including Atlanta Journal-Constitution Editor Kevin Riley, testified Tuesday on Capitol Hill in favor of legislation they say would help recover advertising revenue lost in recent years to tech behemoths such as Google and Facebook." The bipartisan bill would provide a four-year reprieve from federal antitrust laws, allowing print and digital publishers to collectively bargain with tech companies about how their content is used -- and what share of ad dollars they'll receive.... Federal antitrust laws bar news organizations from banding together to negotiate more favorable terms from social media and search sites. And individual outlets are deterred from acting alone, according to Chavern's group, because large tech companies could tank a news organization's traffic by demoting or excluding its stories from searches. The bill's proponents say it could help turn the tide for an industry that's been harmed over the past two decades by declining print subscriptions and ad revenue streams that have dried up and increasingly headed online. As tech sites' share of advertising revenue has grown -- Google's skyrocketed from $3.8 billion in 2005 to $52.4 billion in 2017 -- U.S. newspapers have watched their's nosedive from more than $49 billion to $16.5 billion during the same 12-year period, according to the Pew Research Center.

    Read more of this story at Slashdot.

  • These Are the Internet of Things Devices That Are Most Targeted By Hackers
    2019-06-15T22:34:00+00:00
    ZDNet reports: Internet-connected security cameras account for almost half of the Internet of Things devices that are compromised by hackers even as homes and businesses continue to add these and other connected devices to their networks. Research from cybersecurity company SAM Seamless Network found that security cameras represent 47 percent of vulnerable devices installed on home networks. According to the data, the average U.S. household contains 17 smart devices while European homes have an average of 14 devices connected to the network... Figures from the security firm suggest that the average device is the target of an average of five attacks per day, with midnight the most common time for attacks to be executed -- it's likely that at this time of the night, the users will be asleep and not paying attention to devices, so won't be witness to a burst of strange behavior. The anonymous reader who submitted this story suggests a possible solution: government inspectors should examine every imported IoT device at the border. "The device gets rejected if it has non-essential ports open, hard-coded or generic passwords, no automated patching for at least four years, etc."

    Read more of this story at Slashdot.

  • Target Experiences A 'Massive' Nationwide Cash Register Outage
    2019-06-15T21:34:00+00:00
    CBS News reports: Target acknowledged nationwide "system issues" affecting its stores on Saturday that prevented its customers from checking out at registers. The outage caused long checkout lines at Target locations, with upset customers posting images and video on social media. Slashdot reader McGruber shared an article reporting more than 5,000 posts on Downdetector.com about problems at Target stores Saturday -- and noting that Target is America's eighth-largest retailer. (CBS reports Target has 1,800 stores scattered across the country.) "This is how you bring America to a standstill," a Minnesota news producer joked on Twitter (where the phrase #targetdown is now trending...) "At least Target kept me fed," the news producer added later. "They brought out candy and popcorn and wings. I'm thinking they should set up a TV next and pop in a movie. Maybe we can play bean bag toss, too..."

    Read more of this story at Slashdot.

  • Star Trek Logo Spotted On Mars
    2019-06-15T20:34:00+00:00
    Long-time Slashdot reader fahrbot-bot brings us news about the southern hemisphere of Mars: The University of Arizona HiRISE (High Resolution Imaging Science Experiment) has posted a photo of curious chevron shapes in southeast Hellas Planitia that are the result of "a complex story of dunes, lava, and wind." "Enterprising viewers will make the discovery that these features look conspicuously like a famous logo..." RockDoctor (Slashdot reader #15,477) adds that "For those wanting to try to find it on a Mars map, it's at Latitude (centered) -49.325Â Longitude (East) 85.331Â."

    Read more of this story at Slashdot.

  • How to Get XKCD Author Randall Munroe To Visit Your City
    2019-06-15T19:34:00+00:00
    Since 2005 Randall Munroe has been the author/illustrator of the popular nerdy comic strip XKCD -- and he's now planning to publish "the world's least useful self-help book." How To: Absurd Scientific Advice for Common Real-World Problems offers readers a third choice beyond simply doing things either the right way or the wrong way: "a way so monumentally bad that no one would ever try it," according to a new page at XKCD.com: It describes how to cross a river by removing all the water, outlines some of the many uses for lava around the home, and teaches you how to use experimental military research to ensure that your friends will never again ask you to help them move. To promote the book Munroe has already scheduled visits in 14 nerd-friendly cities (including New York, San Francisco, Seattle, Portland, Los Angeles, and Raleigh). But a final 15th city will be chosen "based on the results of a challenge..." The challenge: Write the best story using nothing but book covers. Arrange the titles of your favorite books into sentences that tell a story, assemble a single continuous line of people holding up the covers, and take a photo or video documenting your feat. You can make the story as long as you want, but each book needs to be held by a different human. Creative grammar is fine, and you'll get extra credit for including as many books and people as possible. Photos should be either shared on social media with the hashtag #howtoxkcd, or emailed to that address on Gmail. "Submit your entry between June 10 and July 31," explains the site, adding that a winner will be announced in August. "Make sure to include your location (city/state, US only) so we know where to find you!"

    Read more of this story at Slashdot.

  • New Hampshire Unveils a Historical Highway Marker For The BASIC Programming Language
    2019-06-15T18:34:00+00:00
    "It took 10 months to get it done, but the Granite State is now officially a Geeky State," writes Concord Monitor science reporter David Brooks. "The latest New Hampshire Historical Highway Marker, celebrating the creation of the BASIC computer language at Dartmouth in 1964, has officially been installed. Everybody who has ever typed a GOTO command can feel proud..." Last August, I wrote in this column that the 255 official historical markers placed alongside state roads told us enough about covered bridges and birthplaces of famous people but not enough about geekiness. Since anybody can submit a suggestion for a new sign, I thought I'd give it a shot. The creation of BASIC, the first programing language designed to let newbies dip their intellectual toes into the cutting-edge world of software, seemed the obvious candidate. Beginner's All-purpose Symbolic Instruction Code has probably has done more to introduce more people to computer programming than anything ever created. That includes me: The only functioning programs I've ever created were in vanilla BASIC, and I still recall the great satisfaction of typing 100 END... But BASIC wasn't just a toy for classrooms. It proved robust enough to survive for decades, helping launch Microsoft along the way, and there are descendants still in use today. In short, it's way more important than any covered bridge. The campaign for the marker was supported by Thomas Kurtz, the retired Dartmouth math professor who'd created BASIC along with the late John Kemeny. "Our original idea was to mention both BASIC and the Dartmouth Time-Sharing System, an early system by which far-flung computers could share resources. They were created hand-in-hand as part of Kemeny's idea of putting computing in the hands of the unwashed masses. "However, the N.H. Division of Historical Resources, which has decades of experience creating these markers, said it would be too hard to cram both concepts into the limited verbiage of a sign." The highway marker calls BASIC "the first user-friendly computer programming languages... BASIC made computer programming accessible to college students and, with the later popularity of personal computers, to users everywhere. It became the standard way that people all over the world learned to program computers, and variants of BASIC are still in use today." In the original submission, an anonymous Slashdot reader notes that last month, Manchester New Hampshire also unveiled a statue of Ralph Baer, whose team built the first home video game sold as Magnavox Odyssey, sitting on a park bench. "The Granite State isn't shy about its geek side."

    Read more of this story at Slashdot.

  • KDE Plasma 5.16 Released
    2019-06-15T18:04:00+00:00
    Long-time Slashdot reader jrepin writes: The KDE community has released Plasma 5.16, the newest iteration of the popular desktop environment. It features an improved notification system, Not only can you mute notifications altogether with the Do Not Disturb mode, but the system also groups notifications by app. Developers also focused on user's privacy. When any application accesses the microphone, an icon will pop up in your system tray, showing that something is listening. Vaults, a built-in utility to encrypt folders, are easier and more convenient to use. Dolphin file and folder manager now opens folders you click on in new tabs instead of new windows. Discover software manager is cleaner and clearer as it now has two distinct areas for downloading and installing software. The Wallpaper Slideshow settings window displays the images in the folders you selected, and lets you select only the graphics you want to display in the slideshow. For a more comprehensive overview of what to expect in Plasma 5.16, check out the official announcement or the changelog for the complete list of changes.

    Read more of this story at Slashdot.

  • Vim and Neo Editors Vulnerable To High-Severity Bug
    2019-06-15T17:34:00+00:00
    JustAnotherOldGuy quotes Threatpost: A high-severity bug impacting two popular command-line text editing applications, Vim and Neovim, allow remote attackers to execute arbitrary OS commands. Security researcher Armin Razmjou warned that exploiting the bug is as easy as tricking a target into clicking on a specially crafted text file in either editor. Razmjou outlined his research and created a proof-of-concept (PoC) attack demonstrating how an adversary can compromise a Linux system via Vim or Neowim. He said Vim versions before 8.1.1365 and Neovim before 0.3.6 are vulnerable to arbitrary code execution... Vim and Neovim have both released patches for the bug (CVE-2019-12735) that the National Institute of Standards and Technology warns, "allows remote attackers to execute arbitrary OS commands via the :source! command in a modeline." "Beyond patching, it's recommended to disable modelines in the vimrc (set nomodeline), to use the securemodelinesplugin, or to disable modelineexpr (since patch 8.1.1366, Vim-only) to disallow expressions in modelines," the researcher said.

    Read more of this story at Slashdot.

  • FBI Issues Search Warrant To 8chan For IP Address of Shooter, Commenters
    2019-06-15T16:34:00+00:00
    An anonymous reader quotes the Daily Beast: The online forum where alleged Chabad of Poway shooter John Earnest shared a livestream of the shooting was served a search warrant in April for the IP and metadata information on Earnest's posts, as well as those who commented on them. The warrant served to 8chan said the people who responded to Earnest's comments could be "potential witnesses, co-conspirators and/or individuals who are inspired" by his posting about the shooting. Similarly, according to the FBI agent who penned the warrant, there was evidence that Earnest himself was "inspired and/or educated" by other individuals posting on the forum.

    Read more of this story at Slashdot.

 

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ph: 919.660.2800
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Mathematics Department
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