sness

Tuesday, March 03, 2009

arithmetic coding

Arithmetic Coding + Statistical Modeling = Data Compression
Optimizing Tip on Adaptive Arithmetic Coding
Arithmetic Coding
Arithmetic Coding links
Infinite-Precision Arithmetic
Arbitrary-precision arithmetic
Arithmetic coding - by Arturo San Emeterio Campos

ruby/smalltalk

What The Ruby Craftsman Can Learn From The Smalltalk Master

core

25th anniversary of Core Wars. I remember a version of Corewars on my Mac Plus, back in the day.

click

In search of the click track

Python + remix = find beats in songs. Neat.

Predicting and controlling NetHack's randomness. Wow, and I thought I was obsessive about Nethack.

Actually, I don't play Nethack anymore, except for once a year for the tourament. I have too much other cool stuff to do now, for the first time evar.

collab

Collaborative Map-Reduce in the Browser.

Monday, March 02, 2009

advances

Advances in Bioacoustics. So neat.

convert

A little bit of C++ that I whipped up to convert to and from binary, since I didn't find anything too inspiring online:


string binary(int v, int bits) {

  int p;

  string s = "";

  for (int i = bits; i >= 0; i--) {
    p = pow(2,i);
    if (v & (1 << i)) {
      s += "1";
    } else {
      s += "0";
    }
  }

  return s;
}

Convert a bitstream to a floating point number between 0 and 1. It's a smart little function
because it figures out the range from the length of the input string


float convert_bitstring_to_float(string s) {

  float v = 0;

  int len = s.length();

  for (int i = 0; i < len; i++) {
    cout << "i=" << i << " s[i]=" << s[i] << endl;
    if (s[len-i-1] == '1') {
      v += (1 << i);
    }
  }  
   
  return v / (pow(2,len));
}

history

Papers on the History and Concept of Computability

Check out: Computability and Recursion

latex

Whenever you use figures, always (and I mean ALWAYS EVER FOREVER ALWAYS) put \caption first, and \label second like this:


\begin{figure}[htp]
  \centering
  \includegraphics{image.eps}
  \caption{Some Image}
  \label{fig:some-image}
\end{figure}

Sunday, March 01, 2009

Look Around You - Computer Games

Look Around You - Music

record

recordmydesktop --on-the-fly-encoding --full-shots -fps 29.97 -width 720 -height 528 -x 20 -y 40

keyjnote -f -g 724x532 python-before-eggs.pdf

mencoder out.ogv -ovc libdv -oac pcm -vf scale=720:480 -o editme.dv

cinelerra (or After Effects, Adobe Premier, Final Cut Pro)

mencoder cinelerra.ogg -vf scale=640:480 -af volnorm=1:0.5 -ovc lavc -oac twolame -o final.avi

keyjnote

KeyJnote - is a program that displays PDF presentation slides with style. Smooth alpha-blended slide transitions are provided for the sake of eye candy, but in addition to this, KeyJnote offers some unique tools that are very useful for presentations.