Machine Learning / Linguistics

Manifold Learning and Dimensionality Reduction with Diffusion Maps
- Abstract: This report gives an introduction to diffusion maps, some of their underlying theory, as well as their applications in spectral clustering. First, the shortcomings of linear methods such as PCA are shown to motivate the use of graph-based methods. We then explain Locally Linear Embedding, Isomap and Laplacian eigenmaps, before we give details on diffusion maps and anisotropic diffusion processes.
Rayleigh-Ritz quotient maximization by the largest eigenvector, a detailed proof with a quick introduction to linear algebra
Convex Optimization And Modeling Tutorials - some proofs and Matlab code related to convex optimization
Notes on the Formal Semantic Analysis of Metonymy and Metaphor [German] (pdf) Variation of Meaning in Natural Languages

Lisp/Natural Language Processing

Syntagme Verbal

> Synthia - A deep syntactic parser for French (CLISP-CGI with latex tree output, converted to an image, big French dictionary and simple syntax rules). You can test it online.
Load Special Characters In Clisp - How to use special characters like French accents (é,è,ê,...) or German \"Umlaut\"s (äöü) in loaded files
Special Characters In CGI - How to enable cgi scripts to use French Accents or other special characters.
Lisp CGI - How to set up lisp as a CGI in Apache2 (under Ubuntu or other *nix OS)
Write To File In Lisp - a function that creates a file and writes a string into it.
Dump Image From Clisp - how to dump an image of clisp with all the already loaded functions and variables for later use and fast loading times

The code is in the .jar files. Beware, these were our first steps in Java.
Zero Finder - A little console java program to find a function's zeros with either Regula Falsi ? or Newton
Caesar Chiffre - A simple console program that can encode and decode textfiles with the Caesar Chiffre
Pythagoras Fractals - A GUI that lets you draw pythagoras fractals.
Game Of Life - This is not really a game but rather a way to see how evolution can - with simple rules - create some interesting patterns in each life cycle.

Small Perl script that creates a suffix array, see http://en.wikipedia.org/wiki/Suffix_array for more details.
Some notes on the Pocket Loox T 830 PDA
My digital camera Sony DSC P150 had dust on the CCD sensor. This tutorial has great instructions for cleaning the CCD.
Link Board - interesting links about cs, math, software, philosophy, literature and miscellany
Deactivate Activesync Sound