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Welcome to my blog, which was once a mailing list of the same name and is still generated by mail. Please reply via the "comment" links.

Always interested in offers/projects/new ideas. Eclectic experience in fields like: numerical computing; Python web; Java enterprise; functional languages; GPGPU; SQL databases; etc. Based in Santiago, Chile; telecommute worldwide. CV; email.

Personal Projects

Lepl parser for Python.

Colorless Green.

Photography around Santiago.

SVG experiment.

Professional Portfolio

Calibration of seismometers.

Data access via web services.

Cache rewrite.

Extending OpenSSH.

Last 100 entries

Flexible Muscle-Based Locomotion for Bipedal Creatures; SQL Performance Explained; The Little Manual of API Design; Multiple Word Sizes; CRC - Next Steps; FizzBuzz; Update on CRCs; Decent Links / Discussion Community; Automated Reasoning About LLVM Optimizations and Undefined Behavior; A Painless Guide To CRC Error Detection Algorithms; Tests in Julia; Dave Eggers: what's so funny about peace, love and Starship?; Cello - High Level C Programming; autoreconf needs tar; Will Self Goes To Heathrow; Top 5 BioInformatics Papers; Vasovagal Response; Good Food in Vina; Chilean Drug Criminals Use Subsitution Cipher; Adrenaline; Stiglitz on the Impact of Technology; Why Not; How I Am 5; Lenovo X240 OpenSuse 13.1; NSA and GCHQ - Psychological Trolls; Finite Fields in Julia (Defining Your Own Number Type); Julian Assange; Starting Qemu on OpenSuse; Noisy GAs/TMs; Venezuela; Reinstalling GRUB with EFI; Instructions For Disabling KDE Indexing; Evolving Speakers; Changing Salt Size in Simple Crypt 3.0.0; Logarithmic Map (Moved); More Info; Words Found in Voynich Manuscript; An Inventory Of 3D Space-Filling Curves; Foxes Using Magnetic Fields To Hunt; 5 Rounds RC5 No Rotation; JP Morgan and Madoff; Ori - Secure, Distributed File System; Physical Unclonable Functions (PUFs); Prejudice on Reddit; Recursion OK; Optimizing Julia Code; Cash Handouts in Brazil; Couple Nice Music Videos; It Also Works!; Adaptive Plaintext; It Works!; RC5 Without Rotation (2); 8 Years...; Attack Against Encrypted Linux Disks; Pushing Back On NSA At IETF; Summary of Experimental Ethics; Very Good Talk On Security, Snowden; Locusts are Grasshoppers!; Vagrant (OpenSuse and IDEs); Interesting Take On Mandela's Context; Haskell Cabal O(n^2) / O(n) Fix; How I Am 4; Chilean Charity Supporting Women; Doing SSH right; Festival of Urban Intervention; Neat Idea - Wormholes Provide Entanglement; And a Link....; Simple Encryption for Python 2.7; OpenSuse 13.1 Is Better!; Little Gain...; More Details on Technofull Damage; Palmrest Cracked Too....; Tecnofull (Lenovo Support) Is Fucking Useless; The Neuroscientist Who Discovered He Was a Psychopath; Interpolating Polynomials; Bottlehead Crack as Pre-amp; Ooops K702!; Bottlehead Crack, AKG K701; Breaking RC5 Without Rotation; Great post thank you; Big Balls of Mud; Phabricator - Tools for working together; Amazing Julia RC5 Code Parameterized By Word Size; Chi-Square Can Be Two-Sided; Why Do Brits Accept Surveillance?; Statistics Done Wrong; Mesas Trape from Bravo; European Report on Crypto Primitives and Protocols; Interesting Omissions; Oryx And Crake (Margaret Atwood); Music and Theory; My Arduino Programs; Elliptic Curve Crypto; Re: Licensing Interpreted Code; Licensing Interpreted Code; ASUS 1015E-DS03 OpenSuse 12.3 SSD; translating lettuce feature files into stub steps files; Re: translating lettuce feature files into stub steps files; A Tale of Two Psychiatrists; The Real Reason the Poor Go Without Bank Accounts; The Rational Choices of Crack Addicts

© 2006-2013 Andrew Cooke (site) / post authors (content).

On-Demand CDs

From: "andrew cooke" <andrew@...>

Date: Thu, 4 Jan 2007 12:03:44 -0300 (CLST)

On Tuesday evening we went out for Sushi (at "Too Much" in Providencia -
it was OK, I think Pauli was more impressed with it than me, and she's the
Sushi person) and the following came up in conversation:

Why don't music shops (places that sell CDs) burn them on demand?  I've
read recently that books may soon be printed on demand - it seems that CDs
should be an easier problem.  The printing is smaller volume (although
perhaps higher quality) and burning a CD should be pretty easy.

Looking at my files, a flac track is about 30MB.  So an album is about
300MB.  A 1TB disk (not expensive these days) could hold 3000 CDs and
cover art.  That's about the number of CDs in a small-ish shop, by my
reckoning (I estimated 2500 CDs in my local store).

Disk, printer and burner can't run to more than $10,000 which is probably
about the price of the stock.  So we seem to be at about break-even point.

I assume the big record companies would ship out hard drives already
loaded with music, and perhaps HD-DVDs or Blue Rays or whatever with
updates each month.

Moving past the break-even stage, imaging what will happen - the variety
of Amazon on the street corner!  I wonder how Amazon feels about this?  I
wonder who is doing this already?

Andrew

Typing Mistakes

From: "andrew cooke" <andrew@...>

Date: Thu, 4 Jan 2007 12:09:42 -0300 (CLST)

Given the nature of this site (uploaded emails), it's hard to edit posts
once they are published.  So I often wince to see my typing mistakes.

It's interesting to see the kinds of mistakes that are made.  One command
kind is letter transposition.  This seems to be a timing error (I type
quite quickly, but was never taught, so it's a bit hit and miss). "Teh" is
the big example here.

Another example is typing the wrong word.  Either because it is spelt
similar to another, or sounds similar.  I seem to do both.  My guess is
that this is a breakdown in the communication between higher level
(semantics-aware) and lower level (syntax only) parts of the brain.

Of course, some of the latter class may also be real mistakes.

Andrew

ITb Disk

From: "andrew cooke" <andrew@...>

Date: Fri, 5 Jan 2007 09:30:30 -0300 (CLST)

Hitachi have just announced a 1Tb disk -
http://www.reghardware.co.uk/2007/01/05/hitachi_unveils_first_1tb_hdd/

(shipping Q2)

Andrew

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