Posts

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There used to be the Six Million Dollar Man, but now with inflation and all, we have the 200 Million Dollar Assumption. In some of the Slides from the workshop on Science on the Sphere, you may have noticed this slide from Tom Kitching on Weak lensing on the sphereI went ahead and asked Tom what he meant by mentioning a 200M$assumption, here is what he responded:Dear Igor,Thank you for your email.The the plot on the slide is from this paper http://arxiv.org/pdf/1007.2953.pdf where we […] + Hamas is trying to kill as many civilians as it can. Israel is trying to kill as few civilians as it can. Neither is succeeding very well. + Tested Builds: Japanese Papercraft, Part 4 + No summary available for this post. + Laurent Duval just sent me the following:Dear IgorNuit Blanche is a nest of choice for many sparsities. The ones of concern here are those approximated by an$l_1/l_2$, or Taxicab/Euclidean norm ratio, which was already covered in some of your posts: http://nuit-blanche.blogspot.fr/2012/04/compressive-sensing-this-week.htmlhttp://nuit-blanche.blogspot.fr/2012/03/old-and-new-algorithm-for-blind.htmlhttp://nuit-blanche.blogspot.fr/2008/05/cs-kgg-explanation-of-l0-and-l1.html We propose […] July 23, 2014 + 3D printing's popularity continues to grow and more people are taking the plunge into this new consumer technology. With Will and Norm having built a Printrbot Simple for us, I thought it would be a good time to talk about buying your own printer. There are a many choices out there and it can be a lot of confusing misinformation which overwhelms you. It's not possible to cover all the printers out there, so we'll cover the basics and things to consider when buying a printer and places to look […] + No summary available for this post. + In the mid-60s, the Soviet Union staged an international exhibition to showcase the achievements of Communism to westerners. Included in the exhibition was a never-flown, production version of one of the USSR's Luna moon probes. This io9 article details the caper, but The National Security Archive has a declassified version of the original report as well as several other fascinating declassified documents, including details about the Navy's attempts to use the Moon for untraceable communication. + From a discussion of the Hemingway app on Hacker News, jaxn writes, Could someone create a gmail plugin to filter my outgoing emails through this. Maybe it would help to make my emails clearer and more persuasive. To which fl0wenol replies, No, because instead of discerning if you're a dullard by the quality of your writing at a glance, I'll instead have to stumble through mechanically de-voiced inanity. At least without Hemmingway your stream-of-consciousness as committed to typed form can be […] + The webpage of the EADS Summer School on Hashing: Theory and Applications that took place on July 14-17, 2014 at University of Copenhagen, Denmark, now features the slides of the presentation made there:OVERVIEW AND GOALHashing is used everywhere in computing and is getting increasingly important with the exploding amount of data. The summer school will provide an in-depth introduction to hashing, both theory and applications. The topics range will from modern theory of hashing, […] + Tested Builds: Japanese Papercraft, Part 3 + No summary available for this post. + In light to a recent update on ArXiv, I asked Dror Baron to provide me some context on his different papers related to universal signal recovery, here is what he had to say: Hello Igor,Here's a link to a recent submission: http://arxiv.org/abs/1204.2611I know that we have multiple related algorithms recently, so let me try to explain:1. In a compressed sensing problem, y=A*x+z, this work is trying to solve xhat = argmin_w H(w)-log(f_Z(zhat=y-A*w)), where xhat is our estimate for x given y […] + I've spent the last week testing Overcast, a new podcast player from Marco Arment, the creator of Instapaper. I spend most of my time in the car listening to podcasts, but I've never found a client that worked exactly as I expect. While there are several apps out there that should provide what I want in a podcast player--a constantly updated list of the shows I listen to, downloaded when I'm on Wi-Fi, and ready to play whenever I hop in the car or hit the play button on my earbuds--every client […] July 22, 2014 + Sweave and Pweave are programs that let you embed R and Python code respectively into LaTeX files. You can display the source code, the result of running the code, or both. lhs2TeX is roughly the Haskell analog of Sweave and Pweave. This post takes the sample code I wrote for Sweave and Pweave before and […] + Yesterday, me, Ben Hall and Samin Ishtiaq (both Microsoft Research Cambridge) submitted a paper to WSSSPE2, the 2nd Workshop on Sustainable Software for Science: Practice and Experiences to be held in conjunction with SC14 in New Orleans in November. As per the aims of the workshop: progress in scientific research is dependent on the quality […] + Much like the presentation by Lei Tang (Wallmart Labs) on Adaptive User Segmentation for Recommendation at last year's GraphLab 2013 (see Slides (pdf) here and video here). Xavier Amatriain, of Netflix, made a presentation of what we should be expecting in terms of recommendation. The idea here is that most of this work cannot be static otherwise your customers just won't be responsive to it. Here are his slides and the attendant videos from the Machine Learning Summer School organized in […] + So, the Templeton Foundation invited me to write a 1500-word essay on the above question. It’s like a blog post, except they pay me to do it! My essay is now live, here. I hope you enjoy my attempt at techno-futurist prose. You can comment on the essay either here or over at Templeton’s site. Thanks […] + One of my favorite books when I was growing up was the Mathematics volume in the LIFE Science Library. I didn’t own the book, but my uncle did, and I’d browse through the book whenever I visited him. I was too young at the time to understand much of what I was reading. One of […] + No summary available for this post. + Tested Builds: Japanese Papercraft, Part 2 + Adam, Norm, and Will are joined by Frank Ipolitto to discuss mental and physical preparations for the rigors of con life. + After spending almost 20 hours with the best new Blu-ray players for 2014, the$90 LG BP540 came out on top after our previous pick was discontinued. The LG fits our criteria for a good player thanks to integrated Wi-Fi and the most popular streaming apps. More importantly, it has a better interface and video quality than the competition and offers the best combination of price and performance of those we looked at.Who am I to make that claim? I’ve been handling almost all the Blu-ray […]
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Benjamin Trémoulhéac just sent me the following:Dear Igor,You and your readers might be interested in my paper recently published (early view) which is about the use of the RPCA (or L+S) model in dynamic MR imaging from partial Fourier samples for both reconstruction and separation:Dynamic MR image reconstruction–separation from undersampled (k,t)-space via low-rank plus sparse priorhttp://dx.doi.org/10.1109/TMI.2014.2321190​​(This is an open access article […]
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Interesting review of the TT approach:Tensor Networks for Big Data Analytics and Large-Scale Optimization Problems by Andrzej CichockiIn this paper we review basic and emerging models and associated algorithms for large-scale tensor networks, especially Tensor Train (TT) decompositions using novel mathematical and graphical representations. We discus the concept of tensorization (i.e., creating very high-order tensors from lower-order original data) and super compression of data achieved via […]
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How to find approximate page rank fast, among other things Jennifer Chayes is the current director of a research lab in Cambridge—that is Cambridge Massachusetts—for a company called Microsoft. She is famous for her own work in many areas of theory, including phase transitions of complex systems. She is also famous for her ability to […]

July 21, 2014

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We mentioned it before, the GraphLab conference is on and it is streamed live here. The program is here (the Twitter tag seems to be #GraphLabConf )Day 1: Monday, July 21, 2014General Admission. Registration opens at 8:00am.Session 1: Data Product Pipeline in Practice9:00am Prof. Carlos Guestrin Co-Founder & CEO, GraphLab Keynote: GraphLab Strategy, Vision and Practice10:10am Baldo Faieta Social Computing Lead, Adobe Systems Algorithms for Creatives Talent Search using […]
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Being a big fan of in ear headphones and a Sennheiser fan I was excited to be able to have a good play with the latest MOMENTUM on-ear headphones in the Brazilian World Cup colours.  After all you can’t help but get swept up in what was World Cup mayhem! I’m not usually one for […]
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You've probably heard the meme about "Michael Collins being the Only Human, Living or Dead, Not Contained in the Frame of this Picture"Here is another:"By the time this picture was taken, More Than 20 Artificially Intelligent Space Probes Were Already Not Contained in the Frame of this Picture"Some folks might argue that the space probes were not intelligent since they were commanded and controlled from Earth. This is not exactly true. There was at least one algorithm running on all these […]
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This is a post-publication peer review (HIBAR: “Had I Been A Reviewer”) of the following paper: Levi, M., Li, K., & Zhang, F. (2010). Deal or no deal: Hormones and the mergers and acquisitions game. Management Science 56, 1462 -1483. A citeable version of this post-publication peer review can be found at SSRN: Schönbrodt, Felix […]