Friday, April 30, 2010
Thursday, April 29, 2010
history
A Brief, Incomplete, and Mostly Wrong History of Programming Languages
1936 - Alonzo Church also invents every language that will ever be but does it better. His lambda calculus is ignored because it is insufficiently C-like. This criticism occurs in spite of the fact that C has not yet been invented.
tail
Tail recursion - In computer science, tail recursion (or tail-end recursion) is a special case of recursion in which the last operation of the function, the tail call, is a recursive call. Such recursions can be easily transformed to iterations. Replacing recursion with iteration, manually or automatically, can drastically decrease the amount of stack space used and improve efficiency. This technique of iterative calculation is commonly used with functional programming languages, where the declarative approach and explicit handling of state promote the use of recursive functions that would otherwise rapidly fill the call stack.
What is tail-recursion?
The basic idea behind Tail Recursion
Wednesday, April 28, 2010
Tuesday, April 27, 2010
test
How SQLite Is Tested
"By comparison, the project has 679 times as much test code and test scripts - 45678.3 KSLOC."
Wednesday, April 21, 2010
Tuesday, April 20, 2010
Monday, April 19, 2010
native
Native Audio in the browser - Excellent article.
Cross-browser issues suck. So, for now, just going to develop for Chrome, and then port to other browsers later.
Come on iPhone get embedded audio. 4.0 now.
Sunday, April 18, 2010
Contrast | The Blog | The state of HTML 5 audio support
Contrast | The Blog | The state of HTML 5 audio support
Drat! No audio on the iPod, I just about had my new Orca call catalog going on my iPod. How soon until 4.0?
Drat! No audio on the iPod, I just about had my new Orca call catalog going on my iPod. How soon until 4.0?
Saturday, April 17, 2010
[MIREX] Announcing MIREX 2010: Music Information Retrieval Evaluation eXchange
[MIREX] Announcing MIREX 2010: Music Information Retrieval Evaluation eXchange
[MIREX] Announcing MIREX 2010: Music Information Retrieval Evaluation eXchange
J. Stephen Downie jdownie at illinois.edu
Tue Mar 23 16:32:21 CDT 2010
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]
(Apologies for cross-postings)
MIREX 2010 Call for Evaluation Task Proposals
The International Music Information Retrieval Systems Evaluation
Laboratory (IMIRSEL) team at the University of Illinois at
Urbana-Champaign, is soliciting proposals for evaluation tasks to be
performed as part of the 2010 Music Information Retrieval Evaluation
eXchange (MIREX 2010). Potential participants are invited to submit
proposals for novel evaluation tasks, the re-running of past evaluation
tasks and additional datasets and evaluation metrics to used to run tasks.
Since 2005, MIREX has conducted 760 evaluation runs over a wide range of
MIR tasks. Evaluation tasks from past MIREX evaluations include:
- Audio Test/Train Tasks
- Audio Artist Identification
- Audio Genre Classification
- Audio Music Mood Classification
- Audio Classical Composer Identification
- Audio Onset Detection
- Audio Key Detection
- Audio Tag Classification
- Audio Cover Song Identification
- Real-time Audio to Score Alignment (a.k.a Score Following)
- Query-by-Singing/Humming
- Multiple Fundamental Frequency Estimation & Tracking
- Audio Chord Estimation
- Audio Melody Extraction
- Query-by-Tapping
- Audio Beat Tracking
- Audio Music Similarity and Retrieval
- Structural Segmentation
So that the MIREX team can gauge the level of interest in each task an
online poll has been setup. If you are considering participating in
MIREX 2010 please indicate your likelihood of participation at:
https://spreadsheets.google.com/viewform?formkey=dHNtUjkxQ1M2Q0dQa293cC02TnM2OFE6MA
Please use the MIREX organisation mailing list (EvalFest) for discussion
of MIREX task proposals and other MIREX related issues:
https://mail.lis.illinois.edu/mailman/listinfo/evalfest
The MIREX 2010 wiki will be used to embody and disseminate task
proposals and can be found at:
http://www.music-ir.org/mirex/2010/index.php/Main_Page
Where possible, task related discussions, which should be conducted on
the MIREX organization mailing list (EvalFest), should be summarized on
the appropriate MIREX 2010 wiki pages.
Where possible, definitions or example code for new evaluation metrics
or tasks should be provided to the IMIRSEL team who will embody them in
software as part of the NEMA analytics framework, which will be released
to the community at or before ISMIR 2010 - providing a standardised set
of interfaces and output to disciplined evaluation procedures for a
great many MIR tasks.
Projected Target Dates:
- 1st May 2010: MIREX submission system opens (somewhat hopeful
target date)
- 15th June - 1st July 2010: Rolling MIREX submission system closures
(dates to be announced)
- 15th July 2010: MIREX results posting begins
- 1st August 2010: All MIREX results posted (somewhat hopeful target
date)
- 2-6th August 2010: USMIR Summer School
(http://ismir2010.ismir.net/usmir-summer-school/)
- 9-13th August 2010: ISMIR 2010 Conference
(http://ismir2010.ismir.net/)
Finally, a web-accessible submission and execution system is to be
provided for MIREX by the NEMA project (http://nema.lis.illinois.edu/).
This prototype "MIREX DIY" system will allow users to very simply
submit, configure, test, execute and debug their own submissions and to
inspect or publish their results. As this system is still in its infancy
it may (initially) only be available for selected tasks and participants
at MIREX 2010. Hence, we would like to invite institutions likely to
produce multiple submissions to MIREX 2010 to contact the IMIRSEL team
at mirexteam at googlemail.com and to nominate an individual from their
institution to be tutored on the use of the NEMA service and to manage
their institutions submissions.
Looking forward to the best MIREX yet.
Cheers,
J. Stephen Downie on behalf of the MIREX team.
--
**********************************************************
"Research funding makes the world a better place"
**********************************************************
J. Stephen Downie, PhD
Associate Professor,
Graduate School of Library and Information Science; and,
Center Affiliate, National Center for Supercomputing Applications
University of Illinois at Urbana-Champaign
[Vox/Voicemail] (217) 649-3839
NEMA Project Home: http://nema.lis.uiuc.edu
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]
More information about the EvalFest mailing list
[MIREX] Announcing MIREX 2010: Music Information Retrieval Evaluation eXchange
J. Stephen Downie jdownie at illinois.edu
Tue Mar 23 16:32:21 CDT 2010
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]
(Apologies for cross-postings)
MIREX 2010 Call for Evaluation Task Proposals
The International Music Information Retrieval Systems Evaluation
Laboratory (IMIRSEL) team at the University of Illinois at
Urbana-Champaign, is soliciting proposals for evaluation tasks to be
performed as part of the 2010 Music Information Retrieval Evaluation
eXchange (MIREX 2010). Potential participants are invited to submit
proposals for novel evaluation tasks, the re-running of past evaluation
tasks and additional datasets and evaluation metrics to used to run tasks.
Since 2005, MIREX has conducted 760 evaluation runs over a wide range of
MIR tasks. Evaluation tasks from past MIREX evaluations include:
- Audio Test/Train Tasks
- Audio Artist Identification
- Audio Genre Classification
- Audio Music Mood Classification
- Audio Classical Composer Identification
- Audio Onset Detection
- Audio Key Detection
- Audio Tag Classification
- Audio Cover Song Identification
- Real-time Audio to Score Alignment (a.k.a Score Following)
- Query-by-Singing/Humming
- Multiple Fundamental Frequency Estimation & Tracking
- Audio Chord Estimation
- Audio Melody Extraction
- Query-by-Tapping
- Audio Beat Tracking
- Audio Music Similarity and Retrieval
- Structural Segmentation
So that the MIREX team can gauge the level of interest in each task an
online poll has been setup. If you are considering participating in
MIREX 2010 please indicate your likelihood of participation at:
https://spreadsheets.google.com/viewform?formkey=dHNtUjkxQ1M2Q0dQa293cC02TnM2OFE6MA
Please use the MIREX organisation mailing list (EvalFest) for discussion
of MIREX task proposals and other MIREX related issues:
https://mail.lis.illinois.edu/mailman/listinfo/evalfest
The MIREX 2010 wiki will be used to embody and disseminate task
proposals and can be found at:
http://www.music-ir.org/mirex/2010/index.php/Main_Page
Where possible, task related discussions, which should be conducted on
the MIREX organization mailing list (EvalFest), should be summarized on
the appropriate MIREX 2010 wiki pages.
Where possible, definitions or example code for new evaluation metrics
or tasks should be provided to the IMIRSEL team who will embody them in
software as part of the NEMA analytics framework, which will be released
to the community at or before ISMIR 2010 - providing a standardised set
of interfaces and output to disciplined evaluation procedures for a
great many MIR tasks.
Projected Target Dates:
- 1st May 2010: MIREX submission system opens (somewhat hopeful
target date)
- 15th June - 1st July 2010: Rolling MIREX submission system closures
(dates to be announced)
- 15th July 2010: MIREX results posting begins
- 1st August 2010: All MIREX results posted (somewhat hopeful target
date)
- 2-6th August 2010: USMIR Summer School
(http://ismir2010.ismir.net/usmir-summer-school/)
- 9-13th August 2010: ISMIR 2010 Conference
(http://ismir2010.ismir.net/)
Finally, a web-accessible submission and execution system is to be
provided for MIREX by the NEMA project (http://nema.lis.illinois.edu/).
This prototype "MIREX DIY" system will allow users to very simply
submit, configure, test, execute and debug their own submissions and to
inspect or publish their results. As this system is still in its infancy
it may (initially) only be available for selected tasks and participants
at MIREX 2010. Hence, we would like to invite institutions likely to
produce multiple submissions to MIREX 2010 to contact the IMIRSEL team
at mirexteam at googlemail.com and to nominate an individual from their
institution to be tutored on the use of the NEMA service and to manage
their institutions submissions.
Looking forward to the best MIREX yet.
Cheers,
J. Stephen Downie on behalf of the MIREX team.
--
**********************************************************
"Research funding makes the world a better place"
**********************************************************
J. Stephen Downie, PhD
Associate Professor,
Graduate School of Library and Information Science; and,
Center Affiliate, National Center for Supercomputing Applications
University of Illinois at Urbana-Champaign
[Vox/Voicemail] (217) 649-3839
NEMA Project Home: http://nema.lis.uiuc.edu
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]
More information about the EvalFest mailing list
Friday, April 16, 2010
svg in html
Embedding SVG in XHTML
SVG at w3.org
Using SVG for Flexible, Scalable, and Fun Backgrounds, Part II
Inline SVG in HTML, with Firefox 3.5
SVG In HTML Introduction
Namespaces Crash Course
SVG in HTML
SVG embedded inline in XHTML
svgweb - Scalable Vector Graphics for Web Browsers using Flash
JavaScript for use with SVG
SVG at w3.org
SVG Masking
try out SVG in your browser
carto.net SVG tutorial, example and demonstration site
Will Chrome have support for SVG?
SVG at Wikipedia
Raphael.js - JavaScript Library for doing SVG
The magic words in Django was:
mimetype="application/xhtml+xml"
return render_to_response('onsets/index.html',
{'onsets' : onsets, 'onset_pixels' : onset_pixels, 'recording' : recording},
{}, mimetype="application/xhtml+xml")
Thursday, April 15, 2010
jobs vs knuth
Steve Jobs meets Don Knuth:
"It's a pleasure to meet you, Professor Knuth," Steve said. "I've read all of your books."
"You're full of shit," Knuth responded.
Wednesday, April 14, 2010
crossdomain
Flash and crossdomain.xml.
What I wanted to do was to have my main Flash app load most of it's resources from one host, and then get the big media files from another host. This was almost easy, but a few things were tricky:
1) Make sure you're letting the right hosts through with your crossdomain.xml. The following file lets EVERYTHING through, which is probably not what you want:
<?xml version="1.0"?>
<!DOCTYPE cross-domain-policy SYSTEM "http://www.macromedia.com/xml/dtds/cross-domain-policy.dtd">
<cross-domain-policy>
<allow-access-from domain="*" />
</cross-domain-policy>
2) Put this file in the root directory of the system that you are getting images from. I thought this needed to go on the system that the Flash was being served from, which was my big stumbling block
3) Setup a LoaderContext that will allow you to access the content as data
var loader_context:LoaderContext = new LoaderContext();
loader_context.checkPolicyFile = true;
4) Use ths LoaderContext when getting the resource:
_images[zoom_level][index].load(new URLRequest(url),loader_context);
Tuesday, April 13, 2010
sound laser
This year marks the 50th anniversary of the invention of the laser, which now has an extraordinarily diverse and growing range of applications, from consumer electronics to the highest-precision metrology. Two independent studies using quite different approaches now report successful coherent sound wave amplification, in which mechanical vibrations are produced by processes that mimic stimulated light emission in laser operation. Grudinin et al. use a coupled optomechanical resonator system in which excitation by an optical laser induces mechanical oscillations. Above a critical threshold power of the pump laser, amplification and gain of the mechanical oscillations are observed, producing coherent sound from radio to microwave frequencies. Beardsley et al. use a superlattice semiconductor system to which an electric field is applied. Precise tuning of the superlattice structure produces coherent sound at several hundred GHz, in range of the clothes-penetrating THz scanners being rolled out at airports. The ability to produce intense and coherent beams of sound in these frequency ranges should find immediate application in the imaging technology sector.
Phys. Rev. Lett. 104, 83901; 85501 (2010).
Monday, April 12, 2010
Sunday, April 11, 2010
Thursday, April 08, 2010
Wednesday, April 07, 2010
Monday, April 05, 2010
Personality Test Results
Main Type | Overall Self |
 |  |
| Enneagram Test Results
Your variant is social |
So, I'm a 1,2,5,6,9. I think they need a new "sness" enneagram type. I'm a type 0. or type 11.
Sunday, April 04, 2010
Saturday, April 03, 2010
Thursday, April 01, 2010
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