# Posts

### March 25, 2015

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This post was done in partnership with The Wirecutter, a list of the best technology to buy.Read the full article below atTheWirecutter.comIf you regularly travel with devices needing Wi-Fi, get Verizon's Jetpack MiFi 6620L. Its battery life is among the best we’ve seen in hotspots, it runs on the largest and fastest U.S. LTE network, and its pricing is competitive.Is my smartphone enough?Just about every smartphone can act as a hotspot, sharing its connection over Wi-Fi with tablets or […]
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Android tablets are going through an interesting transition right now. We're seeing the first few hints of 64-bit support, 4:3 screens, and some powerful gaming features. However, these products are still imperfect. I don't think there's such a thing as the perfect Android tablet for everyone right now, but there are a few good ones that might work well for you.Let's check out all the top tablets on the market and see what they all have going for them.Nexus 9If you like having access to the […]
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This is very interesting. In the area of sparsity seeking solvers M-SBL is with AMP one of the interesting solvers to follow. This is in part due to the good results Zhilin Zhang got with block sparsity and non sparse signals in the past.The authors of the following paper change the regularization term of that algorithm and seem to have even better phase transitions for sparse signals. Without further ado:Improving M-SBL for Joint Sparse Recovery using a Subspace Penalty by Jong Chul Ye, Jong […]
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How to tell algorithms apart Edgar Daylight was trained both as a computer scientist and as a historian. He writes a historical blog themed for his near-namesake Edsger Dijkstra, titled, “Dijkstra’s Rallying Cry for Generalization.” He is a co-author with Don Knuth of the 2014 book: Algorithmic Barriers Failing: P=NP?, which consists of a series […]

### March 24, 2015

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In the first installment of this series, I assembled most of the frame components of the Strider Mini Quad. I also installed and soldered the motors and ESCs. Although the flight controller was installed in the frame, it still required attachment of the various wires and configuration of the firmware within. Let’s focus on those tasks and keep moving.Plugging in the CC3DThe flight controller is the nerve center of any multi-rotor. It takes your control inputs and the data from its onboard […]
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Sometimes you only need a rough fit to some data and a triangular distribution will do. As the name implies, this is a distribution whose density function graph is a triangle. The triangle is determined by its base, running between points a and b, and a point c somewhere in between where the altitude intersects the base. […]
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Adam's kids are learning to drive, so it's a perfect time to discuss different approaches to teaching this essential life skill with Will and Norm. This week's Still Untitled is sponsored by Tested Premium Memberships. You can find out how to support Tested directly by going to http://tested.com/membership
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Aswin Sankaranarayanan just let me know of the following papers: Hi IgorHope you are well.I wanted to point out a few recent papers.1) LiSens http://arxiv.org/abs/1503.04267This paper describes a multi-pixel extension to the single pixel camera. We show that it is possible to obtain videos at spatial resolution of nearly mega-pixel resolution and at 10 frames-per-second using a sensor array with 1000s of pixel.2) Photometric stereo using BRDF dictionaries. http://arxiv.org/abs/1503.04265This […]

### March 23, 2015

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While it was somewhat overshadowed by the announcement of Inspire 1 quadcopter last year, DJI also released an SDK for its Phantom line of consumer quads. This was a big deal--the SDK allows developers to tap into the data feed and capabilities of the Phantoms, including video streams, camera controls, flight telemetry, and most interestingly, flight control. It meant that devs could make apps to serve as alternatives to DJI's own Vision flight app, or apps with specialized capabilities to […]
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The journal Nature Protocols have geneously agreed to offer a prize for the 2nd placed Scientific Poster at VIZBI 2015. The prize includes a year’s free online subscription to the journal plus £250 (US$373) cash. Many thanks Nature Protocols! + No summary available for this post. + Among virtual reality enthusiasts, there seems to be a conviction that this current wave of VR is destined to succeed. The technology is finally ready; virtual reality as a mainstream platform for computing, entertainment, and digital interactions is inevitable. That's far from the case--regardless of how "ready" the hardware and software experiences are, VR still has to make its case to the public at large. As writer/futurist Warren Ellis points out in this recent Gizmodo Q&A, we should be […] + Hey, did you hear? Apple is releasing a watch next month. And unlike past product category launches like the iPad and iPhone, Apple seems to be a bit more open in allowing the press and public to glimpse into its product development process. There was that massive Jony Ive profile in the New Yorker, where writer Ian Parker spent days in Apple's design lab chatting with Ive's collaborators. There are the three craftsmanship videos about Apple watch manufacturing, which Greg Koenig has […] + Les résultats du premier tour des élections départementales en France sont rendus difficilement lisibles par le flot de commentaires politiques de tout bords qui les accompagnent (entre ceux qui ont “gagné” ou “pas trop perdu”, etc.). Cette subjectivité est en partie la conséquence du système d’étiquetage qui ne permet pas au non-initié de calculer précisément le score d’un parti […] + Racing quadrotors have captured the interest of a lot of people. They’re fast, nimble, and tough. Best of all, having a First Person View (FPV) system installed lets you get a sense of what it’s like to be onboard your speed machine. In the past, we’ve presented a video of Norm building a racing quad with the help of Carlos Puertolas (Charpu). We’ve also given you a buyer’s guide that outlined all the equipment you need for your own racing quad. This week, […] + No summary available for this post. + Android devices do a lot of neat stuff out of the box, but you can always load it up with new apps to make if do more stuff. And maybe some games for good measure. This is the Google Play App Roundup where we tell you what's new on Android. Just hit the links to head to the Play Store.This week we finally put that 3D printer to use, visit the past, and become a boss monster.TinkerplayIn my day we didn't have any choice in the design of our action figures. We took what we were given and we liked […] + No summary available for this post. + David Relyea just let me know of his porting the famous SPGL1 solver to Python, woohoo ! Hi Igor,I've entirely ported the Matlab version of SPGL1 to python. It has full functionality (it heavily leverages numpy) and I haven't caught any bugs in it at all, so I'm letting everyone know. I got the ok from Michael Friedlander to distribute it (under the same license, of course). It's at https://github.com/drrelyea/SPGL1_python_port. Please let people know!I also intend to clean it up a bit and have […] ### March 22, 2015 + Here is a followup to a previous Sunday Morning Insight (Muon Tomography as a Moore's Law Enabled Technology). I took notice of it on Rod Adams twitter feed: The result of a 26-day Muon Tomography study of Fukushima Daiichi reactor 1. The report is entitled: Reactor imaging technology for fuel debris detection by cosmic ray muon Measurement status report in Unit-1 and features a two angle tomography of reactor #1 and the attendant Spent Fuel Pool in that same building. Several remarks:The […] ### March 21, 2015 + Here is the video and attendant slides of the Paris Machine Learning Meetup #7 Season 2. I am providing the links that start directly at the beginning of each talk. The Automatic Statistician, Zoubin Ghahramani, Cambridge University, site: The Automatic Statistician Video in English at 30m50s) Certifying and removing Disparate Impact, Suresh Venkatasubramanian,University of Utah and Sorelle Friedler, Haverford College, Site: Computational Fairness Video in English […] ### March 20, 2015 + Ben Lorica just wrote about tensors in Let’s build open source tensor libraries for data science . One of the author whose work was featured in that blog, Anima Anandkumar, kindly responded to one of my comment there: ...Indeed, there are many types of decompositions on tensors, we are certainly not the only ones to be working on them. The paper you point out about tensors states that there can be ill-posed tensors, which is true. In fact, there is another paper which states that […] + No summary available for this post. + It is often said that every cloud has a silver lining. Whereas it may be true that most clouds have a silver lining, I can report observational evidence that this does not hold true for all clouds. Specifically, it is not true for clouds located between the observer and a solar eclipse. + Infinite-dimensional$\ell^1$minimization and function approximation from pointwise data by Ben Adcock We consider the problem of approximating a function from finitely-many pointwise samples using$\ell^1\$ minimization techniques. In the first part of this paper, we introduce an infinite-dimensional approach to this problem. Three advantages of this approach are as follows. First, it provides interpolatory approximations in the absence of noise. Second, it does not require a priori bounds on […]
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This week, Will, Norm, and Jeremy discuss the Carbon 3D printer, Nintendo's foray into mobile gaming, Apple's plan for Watch sales, Windows 10 release details, Sony's Vue over-the-top TV streaming service, and hints at the HTC Vive's price. Enjoy!

### March 19, 2015

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It's no secret we're in the middle of another boom in CS enrollment. Departments everywhere are struggling to keep up with the increased number of students wanting to get into our programs.But there's a chain reaction with potentially nasty consequences coming our way. And while some of this will be obvious to academic types, it might not be obvious to the community at large, or even graduate students considering going into academia. Consider: As departments everywhere try to adjust […]