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Posts

March 27, 2014

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2:33 PM | HODLR and george: Fast Direct Methods for Gaussian Processes and the Analysis of NASA Kepler Mission Data - implementation -
One of the co-author of the following preprint, Leslie Greengard, is one of the authors of the Fast Multipole Method, a matrix factorization method that changed many fields when it appeared. This factorization uses the low rankedness of blocks of dense matrices. I wonder if there are matrices where it would be useful to use a robust PCA on these blocks. Fast Direct Methods for Gaussian Processes and the Analysis of NASA Kepler Mission Data by Sivaram Ambikasaran, […]
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1:00 PM | A Landmark Episode of This Is Only a Test - 3/27/2014
Gary joins Will and Norm to celebrate a milestone, catch up on the last few months, and discuss the implications of Facebook buying Oculus. Enjoy!
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5:50 AM | Inside Adam Savage's Cave: What's in the Mailbag?
No summary available for this post.
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12:42 AM | 10 Things You Should Know about DirectX 12
It’s about efficiency, not new featuresThe new DirectX will add a few new rendering features, but those new features aren’t as important as efficiency. Direct3D 12 has a thinner abstraction layer between the operating system and the hardware. Game developers will have more control over how their code talks to graphics hardware. Overhead is reduced substantially. Time for threads to complete has been reduced by 2-5x in some cases.Only Direct3D 12 has been discussedMost gamers tend to […]

March 26, 2014

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11:59 PM | Jamie Hyneman's Hitchhiking Survival Story
No summary available for this post.
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8:56 PM | A Virtual Locksmith for Proteins
A Virtual Locksmith for Proteins26Mar2014The interaction between proteins and small molecule ligands is often described as akin to a lock and key. The complex, three-dimensional geometry of a protein’s structure creates selective and unique binding sites that are only accessible to certain molecules positioned in just the right way. To discover new drugs that can ward off a bacterial infection or silence a renegade ion channel, scientists have to first determine the protein’s […]
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7:00 PM | What Astronauts Do When There’s Nothing to Do
Whether it’s stoplights, your doctor’s office, or a popular restaurant on Saturday night, waiting is an inescapable aspect of modern life. For many of us, the pain of waiting is rarely much worse than being behind some indecisive couple at the Redbox kiosk. But even that trivial torment can be eased with time-killing apps on your phone. Now imagine that you have a few hours to kill before fulfilling your life’s greatest ambition, with practically nothing to do, all while […]
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6:00 PM | First Ring System Around Asteroid Chariklo found to have two rings
Observations at many sites in South America, including ESO’s La Silla Observatory, have made the surprise discovery that the remote asteroid Chariklo is surrounded by two dense and narrow rings. This is the smallest object by far found to have rings and only the fifth body in the Solar System — after the much larger…Read more →
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5:50 PM | CineGlobe 2014 : films et hackathon
CineGlobe est un festival international du film "inspiré par la science" qui a lieu au Globe de la Science et de l’Innovation du CERN. La quatrième édition a eu lieu la semaine passée. Plus de 3000 spectateurs dont votre serviteur y … Lire la suite →
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5:33 PM | Tensor time: Era of Big Data Processing: A New Approach via Tensor Networks and Tensor Decompositions,
From the first paper: This all shows that, compared to matrix decompositions,  Canonical Polyadic Decomposition (CPD) is unique under more natural and relaxed conditions, that only require the components to be “sufficiently different” and their number not unreasonably large. These conditions do not have a matrix counterpart, and are at the heart of tensor based signal separation How does this approach resolve current heuristics and attendant phase […]
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1:47 PM | Paper Review: Approaches to automatic parameter fitting in a microscopy image segmentation pipeline: An exploratory parameter space analysis
Held C, Nattkemper T, Palmisano R, Wittenberg T. Approaches to automatic parameter fitting in a microscopy image segmentation pipeline: An exploratory parameter space analysis. J Pathol Inform 2013;4:5. DOI: 10.4103/2153-3539.109831 I once heard Larry Wasserman claim that all problems in statistics are solved, except … Continue reading →
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7:00 AM | Hands-On: Virtuix Omni Treadmill with Oculus Rift
No summary available for this post.
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5:00 AM | LRRSC : Subspace Clustering by Exploiting a Low-Rank Representation with a Symmetric Constraint - implementation -
Here some new clustering algorithm added to the Advanced Matrix Factorization Jungle page.  Subspace Clustering by Exploiting a Low-Rank Representation with a Symmetric Constraint by Jie Chen, Zhang YiIn this paper, we propose a low-rank representation with symmetric constraint (LRRSC) method for robust subspace clustering. Given a collection of data points approximately drawn from multiple subspaces, the proposed technique can simultaneously recover the dimension and members […]
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1:09 AM | Why Facebook Buying Oculus VR Is Probably a Good Thing
Earlier today, Facebook announced that it was buying virtual reality startup Oculus for $2 billion, and as is the usual, the Internet erupted in panic. Despite actively disliking what Facebook has become and avoiding the service wherever possible, I actually think Facebook buying Oculus is probably a good thing for Oculus, the virtual reality community, VR enthusiasts, and even gamers.If you take Mark Zuckerberg's post regarding the Oculus acquisition at face value, it seems clear that […]

March 25, 2014

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11:50 PM | The Art of Photogrammetry: Replicating Hellboy’s Samaritan Pistol!
We’ve gone over the basic concepts and photography techniques on how to capture ideal images for photogrammetry 3D scanning. Now let's get into the meat of the subject and start processing our data so we can see some results. The case study we're going to use is a replica prop from the movie Hellboy, which I found at the Tested office. I spent an afternoon photographing the prop, and processed it using PhotoScan software. Here's how that process went, and what you can learn from it.Step […]
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9:52 PM | In Brief: Facebook Buys Oculus VR for $2 Billion
Facebook has just announced that it will acquire Oculus VR, the makers of the Oculus Rift, for $2 billion in cash and stock. According to Facebook's news release, the company "plans to extend Oculus’ existing advantage in gaming to new verticals, including communications, media and entertainment, education and other areas. Given these broad potential applications, virtual reality technology is a strong candidate to emerge as the next social and communications platform." Said the Oculus VR […]
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7:39 PM | Designing roofs and drawing phylogenetic trees
A few years ago after the birth of our second daughter and in anticipation of our third, I started designing a one-room addition for our house. One of the problems I faced was figuring out the shape of the roof. I learned of the concept of the straight skeleton of a polygon, first defined by Oswin […]
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7:27 PM | Photo Gallery: Star Wars Prop and Costume Exhibition
Star Wars: Where Science Meets Imagination is a traveling exhibition organized by Boston's Museum of Science and Lucasfilm. It opened in 2005, and houses props and costumes from all of the Star Wars films, but also emphasizes new areas of research in science and technology as seen through the lens of Star Wars. The exhibit has been traveling around the world since 2006, and made its final stop at The Tech Museum of Innovation in San Jose last October, finishing a 20-venue tour this past […]
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7:22 PM | In Brief: Dark Sky for iOS Is Rad
A few weeks before SXSW, I installed Dark Sky on my phone, and I've been consistently impressed since then. Dark Sky accurately predicted rain in Austin and San Francisco, and even manages to give useful forcasts in San Francisco's microclimates. Because of SF's coastal mountains and fog, it's regularly 50F by the ocean and 85F if you go 15 minutes inland. Even in this hostile environment, Dark Sky gives accurate predictions by comparing your physical location with real-time radar and […]
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6:30 PM | In Brief: Nvidia Announces $3000 Titan Z Video Card
Wasn't it just one month ago that Nvidia announced its GeForce GTX Titan Black video card? Yes, I'm sure it was, because I was in a meeting with them when they mentioned it while briefing me on Maxwell. Titan Black was supposed to be their new super high-end video card--a GTX Titan that ran at an unfettered 889MHz core clock (boosted to 980MHz), and 7GHz GGDR5 memory. Basically a suped-up GTX 780 Ti, priced at $1000. Well that's only one third the price of the new Titan Z video card, announced […]
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6:00 PM | Inside MIT's Tangible Media Group
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5:27 PM | The Energy Demands of Unbuilt Buildings
The Energy Demands of Unbuilt Buildings25Mar2014Many building owners today are looking at green retrofitting options to lower energy demand and costs. From single-family homes to skyscrapers, upgrades such as installing more efficient HVAC systems, installing new windows or green roofs, or switching to low-energy light bulbs can lower utility bills and, in many cases, eventually pay for themselves. A whole industry of energy consultants now helps owners plan for their retrofit, and scientists […]
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5:04 PM | Dictionary Learning in Games
Thanks to a tweet by Robin Green @IgorCarron You got a thank you: http://t.co/4EWJxgc98y — Robin Green (@fatlimey) March 20, 2014 I learned that Manny's slides for this year's Game Developer's Conference were out. Manny uses a specific matrix factorization (dictionary learning) for the decomposition of the cloth movement in animated movie characters (check Skinnned cloth). Back in 1995-96, Texas A&M had started the Student Research Week and I had been asked to be a judge or […]
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5:00 PM | Exhibit Design at The Tech Museum of Innovation
Some time ago on the podcast, I mentioned how unimpressed I was the last time I went to the Tech Museum of Innovation in San Jose. I'm a big fan of visiting science and technology museums in every new city I visit (The Franklin Institute in Philadelphia, OMSI in Portland, and EMP Museum in Seattle are a few of my favorites), but have noticed that some of these museums share similar (and occasionally dated) exhibits. San Francisco's Exploratorium was one of the nation's first interactive science […]
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2:30 PM | Teaching a new language in a course, when the language is not the focus of the course
Like many computer science departments, the languages we teach our students vary over time. When I was hired, we taught Java in Intro and C++ in Data Structures (our CS 2 course). The year I started, we moved to teaching Java in both Intro and Data Structures. (Thank god, because my C++ was pretty rusty […]
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12:23 PM | Balancing Sparsity and Rank Constraints in Quadratic Basis Pursuit - implementation -
You probably recall recently these posts:Nonlinear Basis Pursuit - implementation -Sparse phase retrieval via group-sparse optimizationBlind Identification via Lifting - implementation -all parts of the more generic nonlinear Nonlinear Compressive Sensing family of solvers, well we have a newcomer and its implementation in that area: Balancing Sparsity and Rank Constraints in Quadratic Basis Pursuit by Cagdas Bilen , Gilles Puy, Rémi Gribonval , Laurent Daudet We […]
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7:57 AM | Premium: Behind the Scenes with Adam Savage at SXSW
Premium: Behind the Scenes with Adam Savage at SXSW
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7:30 AM | How To Control and Manage Your Android Phone from Your Desktop
Your smartphone may very well be the hub of your digital life, but there are still times we all need to sit down at a computer to get some work done. At times like that, you don't want to constantly pick up the phone to check notifications, retrieve files, and send messages. There are ways to avoid that by installing a few apps that let you control and manage your Android device from a computer. Your options vary a bit based on how you balance control and convenience.NotificationsOne of the […]
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7:16 AM | The Best Utility Knife Today
If you’re looking for a utility knife for general around-the-house use, we recommend the Milwaukee Fastback II ($15). After 25 hours of research and hands-on testing of 20 different knives, we found that, simply put, this knife has it all. It can be easily (and quickly) opened and closed with one hand. It has a comfortable grip with all the right contours and finger notches. Changing blades is easy and it has a nice, springy belt hook. For increased safety, the knife locks in both the […]
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7:00 AM | On Public Speaking and Dyson Spheres - 3/25/2014
Adam, Will, and Norm discuss death and Star Trek, the real problem with the Holodeck, the problem with Dyson spheres, and Adam's strategies for public speaking. Enjoy!
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