Posts

April 17, 2015

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8:48 AM | Grades of evidence – A cheat sheet
There are at least three traditions in statistics which work with a kind of likelihood ratios (LRs): the “Bayes factor camp”, the “AIC camp”, and the “likehood camp”. In my experience, unfortunately most people do not have an intuitive understanding of LRs. When I give talks about Bayes factors, the most predictable question is “And […]
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7:00 AM | Can We Talk About Vaping? - Episode 9 - 4/17/2015
The dads are back with Darren Gladstone, Greg Vederman, and soon-to-be-dad Nathan Edwards joining the show. Topics include our role during the birth, current favorite kids books, potty training, streaming games, and vaping. Enjoy!
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5:00 AM | Thesis: Turning Big Data into Small Data, Hardware Aware Approximate Clustering with Randomized SVD and Coresets, Tarik Adnan Moon
Here is a senior thesis of interest: Turning Big Data into Small Data: Hardware Aware Approximate Clustering with Randomized SVD and Coresets, Tarik Adnan Moon Organizing data into groups using unsupervised learning algorithms such as k-means clustering and GMM are some of the most widely used techniques in data exploration and data mining. As these clustering algorithms are iterative by nature, for big datasets it is increasingly challenging to find clusters quickly. The iterative nature […]

April 16, 2015

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8:22 PM | Star Wars: The Force Awakens Trailer!!
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3:30 PM | Compressed Sensing Recovery via Nonconvex Shrinkage Penalties
Hat tip to Thomas Arildsen for pointing out this preprint:Compressed Sensing Recovery via Nonconvex Shrinkage Penalties by Joseph Woodworth, Rick Chartrand The ℓ0 minimization of compressed sensing is often relaxed to ℓ1, which yields easy computation using the shrinkage mapping known as soft thresholding, and can be shown to recover the original solution under certain hypotheses. Recent work has derived a general class of shrinkages and associated nonconvex penalties that better […]
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1:30 PM | Adam Savage's One Day Builds: Cylon Models with Battlestar Galactica's Aaron Douglas!
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12:41 PM | CSJob: 18 Funded PhD opportunities (ESRs) in Machine Sensing (Machine Learning, Sparse Representations and Compressed Sensing)
Mark Plumbley just sent me the following:Dear Igor,We think that these PhD opportunities might be of interest to people on Nuit Blanche. They are part of a new "MacSeNet" EU-funded Marie Sklodowska-Curie Innovative Training Network in "Machine Sensing" (including Machine Learning, Sparse Representations and Compressed Sensing). They also come with a competitive salary compared to regular PhD scholarships, so might also be of interest to young researchers who had not otherwise thought of […]
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10:00 AM | Episode 297 - The Apple Watch Watch - 4/16/2015
This week, Will, Norm, and Jeremy discuss Will's visit to Seattle, fancy coffee, Apple Watch try on appointments, Daredevil, CG in Furious 7, and the week's tech news. Enjoy!
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7:19 AM | When it’s worth teaching …
Teaching obligation – doesn’t sound very attractive. Why? Because generally it means much work for little money and almost no reward. Apply for a job in academia. What are the metrics of your qualification? Publications. Impact points. Don’t worry, this is not another discussion about quality metrics in academia, but a very clear statement, that […]
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4:35 AM | Kinds of Continuity
Congratulations to John Nash and Louis Nirenberg on the 2015 Abel Prize Combined from src1, src2. John Nash and Louis Nirenberg have jointly won the 2015 Abel Prize for their work on partial differential equations (PDEs). They did not write any joint papers, but Nirenberg evidently got Nash excited about David Hilbert’s 19th problem during […]

April 15, 2015

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10:32 PM | How I Turned Raspberry Pi 2 into an Audiophile Music Streamer
I was all set for for a Raspberry Pi Model 2 server experiment until somebody asked me if HRT's dSp would work with a Raspberry Pi. Good question. The dSp is a DAC: a Digital to Analog converter. It turns the zeros and ones that make up a digital audio file into the analog signal a pair of headphones or speakers pump into your ears. A good DAC is a critical step in making your audio files sound amazing, and some third-party DACs are much better than the ones built into your smartphone or even […]
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8:00 PM | Interview with Erno Rubik, Inventor of the Rubik's Cube
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3:39 PM | How to Get into Hobby RC: Testing Ares Quadcopters
In my recent look at starter FPV quads, I had an opportunity to log some flight time with the Ares Ethos FPV. I'll admit that I wasn't really familiar with Ares products prior to pulling together that article. I later found out that Ares is a house brand for Hobby Town, a chain of brick-and-mortar hobby shops across the US. Until very recently, I didn't have a Hobby Town within 100 miles of my house. I guess that explains my knowledge gap. Regardless, I was impressed by the Ethos FPV. So I […]
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1:30 PM | Tested In-Depth: Panasonic Lumix LX100
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11:21 AM | QR Codes and Percolation
Percolation theory looks at problems such as the probability of being able to traverse some region with random obstacles. It is motivated by problems such as modeling the flow of a fluid in a porous medium. Here’s a percolation problem for QR codes: What is the probability that there is a path from one side […]
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9:00 AM | Beauty Gadget Review: Philips Lumea Compact
Ever wondered if the IPL hair removers are really worth their money?  Well I took the Philips Lumea Compact on a bit of a test run over the past few months to find out just that. Spring is on it’s way and the last thing us ladies want is hairy or stubbly legs.  We have ... Read more
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5:00 AM | Paris Machine Learning Meetup #8, Season 2: Deep Learning and more...
 This is the where the meetup will be streamed starting at around 7:15PM Paris time. The theme of today's meetup will about (mostly) Deep Learning. It will be held in conjunction with the Deep Learning Paris meetup . We should also have the Kiev Deep Learning Meetup as a guest audience as well. All the presentation slides should be available below by the time the meetup starts. Our host and sponsor in Paris will be Criteo. Here is the program that starts at 19h15 Paris time.+ Yoshua […]

April 14, 2015

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5:00 PM | The Best Bluetooth Kit for Every Car
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 want Bluetooth in your car but don't want to spend the money and/or time to install a new head unit, you have three options, depending on your car's setup and whether your priority is making phone calls or listening to music. If your car has an aux-in (headphone-jack) setup, we recommend iClever's Himbox HB01 ($30). If you don't have an aux-in port […]
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3:30 PM | GPU Accelerated Randomized Singular Value Decomposition and Its Application in Image Compression
Unless I am mistaken, this is the first time I see RandNLA operation performed using a GPU. It is not the last. GPU Accelerated Randomized Singular Value Decomposition and Its Application in Image Compression by Hao Ji and Yaohang LiIn this paper, we present a GPU-accelerated implementation of randomized Singular Value Decomposition (SVD) algorithm on a large matrix to rapidly approximate the top-k dominating singular values and correspondent singular vectors. The fundamental idea of randomized […]
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3:00 PM | Crafting Felt Creatures with Woolbuddy
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1:00 PM | By the numbers
As chair, I spend quite a bit of time with numbers of various sorts. There are budget numbers and enrollment numbers. There’s the number of sections of courses per term and per year. Relatedly, there are FTE numbers, or how many warm bodies do we have to teach courses and how many courses are they […]
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12:00 PM | Why is an empty sum 0 and an empty product 1?
In response to my earlier post on why 0! should be 1, several people replied that 0! = 1 because an empty product is 1. You can define the factorial of an integer n as the product of all positive numbers less than or equal to n. There are no positive integers less than or equal […]
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10:00 AM | Parents - 4/14/2015
Adam, Will, and Norm share important lessons learned from their parents, things they wish they'd learned from their parents, and talk about Adam's impending departure for the Behind the Myths Tour.
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5:00 AM | SOOT l1/l2 norm ratio sparse blind deconvolution - implementation -
Laurent just let me know of the release of an implementation for blind deconvolution:Dear Igor You have been kind enough to publicize the following paper (and you contributed to the build-up as you are indeed in the acknowledgment section featured in http://nuit-blanche.blogspot.fr/2014/07/euclid-in-taxicab-sparse-blind.html )Euclid in a Taxicab: Sparse Blind Deconvolution with Smoothed {\ell _1}/{\ell _2} Regularization  http://dx.doi.org/10.1109/LSP.2014.2362861, […]

April 13, 2015

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11:10 PM | Testing: Samsung Galaxy S6 Smartphone
The new Samsung Galaxy S6 released last Friday sure looks more like an iPhone than any of Samsung's Galaxy phones before it. Unibody aluminum construction, glass front and back, and nary a screw or chunky piece of plastic in sight. Is the design an egregious rip-off? That's for lawyers to argue. But it is absolutely a concession by Samsung that the design ethos we've seen from Apple since the iPhone 4 has merit: a beautiful unibody phone is worth the omission of "power-user" features like a […]
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8:15 PM | Lorries ARE dangerous, but there’s a lot more to consider!
Currently a vivid discussion about HGV’s threat to bicycle safety is going on. A major reason for this is a series of fatal accidents in London . In the wake of this discussion, the European Cyclist’s Federation (ECF) published a blog post by the organization’s Safety Policy Officer, Ceri Woolsgrove. He investigated the ratio between […]
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5:57 PM | Milling Time: Testing the Roland MDX-540 4-Axis CNC
Previously, I've talked about testing the Othermill--an out-of-the-box work horse--and the Shapeoko 2--a CNC kit ripe for re-invention. Today, I'm going to talk about a big boy, examining a CNC mill that's bigger, pricier, and commands a steeper learning curve. That's because we're adding another axis!This is the MDX-540 with a rotary axis made by the Roland DGA Corporation. A 4-axis mill can do everything an X, Y, Z machine can do, but it can also rotate the cutting material around an 'A' […]
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4:56 PM | 3D Robotics Announces 'Solo' Quadcopter
3D Robotics, the US company responsible for the Pixhawk multi-rotor flight controller and several DIY and RTF kits, today announced its latest quadcopter: Solo. This ready-to-fly quadcopter looks like 3DR's most consumer-friendly product yet; it's a self-contained package utilizing 3DR's own transmitter, app, and GoPro camera gimbal. If that sounds a lot like the RTF quads we've seen over the past year, it's not surprising--big multi-rotor companies see a lot of value in the RTF market for […]
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4:33 PM | Dictionary Learning with Few Samples and Matrix Concentration
Here are some theoretical developments for sparse coding, an item discovered experimentally twenty years ago. Dictionary Learning with Few Samples and Matrix Concentration by Kyle Luh, Van VuLet A be an n×n matrix, X be an n×p matrix and Y=AX. A challenging and important problem in data analysis, motivated by dictionary learning and other practical problems, is to recover both A and X, given Y. Under normal circumstances, it is clear that this problem is underdetermined. […]
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3:55 PM | Quantifying uncertainty
The primary way to quantify uncertainty is to use probability. Subject to certain axioms that aim to capture common-sense rules for quantifying uncertainty, probability theory is essentially the only way. (This is Cox’s theorem.) Other methods, such as fuzzy logic, may be useful, though they must violate common sense (at least as defined by Cox’s theorem) […]
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