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Showing posts from 2011

Computer tools for buddies

Amongst a novena of virtual life savers on computers (under Windows XP or seven of course, everything is great with MacOS or Linux), we have the following. If you just want to pick one, pick Everything ! Friends keep on thanking me for that. file finding via Everything , a ligth-weight freeware to find files and directories with wildcards or regular expressions (then you can easily disable Windows *.* indexing and save hassle, space and time). It revolutionized my way of naming AND storing files (project management, bibliographic references files, mainly) USB port cleaning with DriveCleanup when after some use, your usb keys and drives do not mount nicely stuff and idea organizing via mindmapping software, for instance FreeMind or FreePlane task organizing and GTD (getting things done) via ToDO list note taking (simple and yet, simple) via The Guide , or maybe TreeSheet word synonyming via Wordnet communicating via Skype on usb key (its install is forbidden on my work

Chuck Norris keyboard fact

In a long lasting trend of jokes on popular antonyms, Chuck Norris facts as well as Car Friedrich Gauss facts ( The greatest mathematician since antiquity or Gauss facts thus far , see Carl Friedrich Gauss Facts ), i would like to share this chuck-norris-keyboard-fact (shared on Facebook or Twitter ): Chuck Norris just sucks . If he were as smart and strong it's claimed, he'd just come here and slam my head on the keyboard asdmsdfvmwefjkmasd [space] [space] [space] [space] [space]  Okay, i haven't posted nothing for a month, let's be serious for a while. : ChucK: audio programming language   (Strongly-timed, Concurrent, and On-the-fly Audio Programming Language) ChucK is a new (and developing) audio programming language for real-time synthesis, composition, performance, and now, analysis - fully supported on MacOS X, Windows, and Linux. ChucK presents a new time-based, concurrent programming model that's highly precise and expressive (we call this stron

Unary Day

I wouldn't have spent this special day with unary sequence 11h1111s at 11/11/11 without a terrible pun, mentioning it as the anniversary of Attila , since it's "an invasion of the Huns" ("huns" for "ones", uttered with an awful accent); even made a Facebook page for that: Attila Fest . Not proud :) Yet this dull (not in the Ramanujan sense ) sequence reminded me of two nice formula for the golden ratio (aka $\phi$, or the divine proportion): one rational, one radical. So it seems $\phi$ could be tamed (or approched) quite easily. Indeed, it is one of the simplest non-rational numbers, as a root of a basic equation of degree 2. Thus, far from being transcendental . Surprisingly, $\phi$ bears some kind of transcendence (in the religious sense) as it is, somehow, beyond the grasp of the human mind, meaning it cannot be approched easily in a "rational" way, i.e. worse that any other number, as stated in a theorem by Adolf Hurwitz (1856-

Advances in signal and image processing for physico-chemical analysis

Looking for new frontiers in signal and image processing applications in chemical related analysis? Consider the following call for contributions.  Call for papers: Dossier, Special issue on Advances in signal and image processing for physico-chemical analysis ( pdf ) Deadlines - Intent: December 12th, 2011 / Final manuscript: January 8th, 2012 Oil & Gas Science and Technology - Revue d'IFP Energies Nouvelles (online journal) With the advent of more affordable, higher resolution or innovative data acquisition techniques (for instance hyphenated instrumentation such as two-dimensional chromatography), the need for advanced signal and image processing tools has grown in physico-chemical analysis, together with the quantity and complexity of acquired measurements. Either with mono- (signals) or two-dimensional (from hyphenated techniques to standard images) data, processing generally aims at improving quality and at providing more precise quantitative

Opinion on Melancholia

Lars von Trier has recently proposed to the audience the Cannes awarded movie Melancholia . As for the brunette and the blonde sisters (one organized and the other erratic), as for the two planets (Earth and Mechancolia) featured in the movie (one rotating predictively for ever around the sun, the other wobbling to its final destination), the movie has attracted two-pole reviews, either good or bad (in random order). Melancholia , as a science-fiction movie (is it?), dwells on a the line that joins Stanley Kubrick 's 2001 and Andrei Tarkovsky 's Solaris . On very projective line, between "zero and infinity" ( le zéro et l'infini ), which translates into French Darkness at noon by Arthur Koestler . Von Trier 's Mechancolia of course reminds of Albrecht Dürer 's (the painter, not the insect - see Monty Python's in three languages ) Melencolia I ou La Melencolia . The engraving has suffered many interpretations, with all its symbolic details (m

Sparse is compact and in press (special issue)

Szeged University Memorial plaque in honor of Haar and Riesz All papers in press for the Special Issue of Signal Processing on " Multirate Filter Bank Structures and Multiscale Representations " (announced here at Nuit Blanche )  are now available online and published in Volume 91, Issue 12, December 2011 . 100 years after Alfred Haar seed, with the help of about 100 reviewers. While waiting for the paperback versions in the solid world, have a look at the following contributions in digital form, gathered on a dedicated page Signal Processing: Special issue on Advances in Multirate Filter Bank Structures and Multiscale Representations . They deal with 1-D signals to 2-D images, from image coding to compressive sensing, from fixed to adaptive representations, with a common bias toward sparsity. Forthcoming "call for papers" in 2011, related to sparsity, were gathered in a previous post: Sparse is abundant . A century after the first outbreak of wavelets in A

Sparse is abundant

William of Ockham [Updated 2011/06/19 for iTWIST 2012 workshop in Marseille, see at bottom] [Updated 2011/07/02 for a call of paper to Journal of Applied Mathematics on "Preconditioning Techniques for Sparse Linear Systems"] You still have one day (deadline: 2011/06/19) to submit a paper to ACM Multimedia SRED 2011 : First International Workshop on Sparse Representation for Event Detection in Multimedia , from 28. Nov. to 1 Dec. in Arizona, USA. Should you need a little more time, an oxymoric abundance of calls for papers related to sparsity offers additional opportunities. Let's hope your submissions will spark interesting discussions on sparsity on Nuit Blanche . (BTW, thank you Igor for promoting a PhD thesis proposal related to sparsity and seismics , i'll try to make it more international soon). Journal: EURASIP Journal on Advances in Signal Processing Special issue: New Image and Video Representations Based on Sparsity Editors : Fred Truchetet, Uni

Decimate Brands of Banded matrices

About one year ago Gilbert Strang published a first paper Fast transforms: Banded matrices with banded inverses at Proceedings of the National Academy of Science (PNAS), with the following abstract: It is unusual for both $A$ and $A^{-1}$ to be banded — but this can be a valuable property in applications. Block-diagonal matrices $F$ are the simplest examples; wavelet transforms are more subtle. We show that every example can be factored into $A = F_1 \dots F_N$ where $N$ is controlled by the bandwidths of $A$ and $A^{-1}$ (but not by their size, so this extends to infinite matrices and leads to new matrix groups).  Banded matrices (or band matrices) are somewhat related to implementations of discrete wavelet transforms (see for instance Short Wavelets and Matrix Dilation Equations , 1995 by G. Strang and V. Strela). The 2010 PNAS  sparked some interest as a means to implement fast local linear filters in both the forward and inverse transforms (an ascribed tandem , first anagram t