Here are some results. The following is a simulation of Vortex Shedding of an incompressible fluid due to a circular obstacle. The simulation was written in Python using Numpy, Scipy, and Matplotlib and employs the pressure correction method.

Properties of the fluid:
Boundary Velocities:

Another video with the parameters slightly changed. This uses No-Slip boundary conditions on the top and bottom boundaries as well as a smaller fluid channel
Boundary Velocities:

I will release the Python code after I have cleaned it up a bit.

The code is posted on git hub.  Download it using the following commands (if you use git)

git clone git://github.com/rabidgeek/Mesh-Triangulation.git

Or if you prefer a downloadable link:
Download: zip

I found a command line interface for twitter called Twidge that was easy to set up and could easily read my Twitter friend’s feed and output it to the console.  This allowed me to pipe the output to a text file and then use a custom Python script to format the text the way I liked it.  The two lines that needed to be added to Conky are as follows:

{execi 1200 python /home/commander/scripts/tw.py /home/commander/scripts/tweets.txt}

The following is the tw.py python code that reads in the text file generated by Twidge and then reformats it to my choosing.  This code can be ignored if you just want to use the standard output that Twidge uses.  In which case the first line in the Conky script should not pipe the output to the text fiel.

#!/usr/bin/python
#filename: tw.py
import re
import sys
from time import strftime

def format(text, indent=2, width=70):
    """
    Format a text block.

    This function formats a block of text. The text is broken into
    tokens. (Whitespace is NOT preserved.) The tokens are reassembled
    at the specified level of indentation and line width.  A string is
    returned.

    Arguments:
        `text`   -- the string to be reformatted.
        `indent` -- the integer number of spaces to indent by.
        `width`  -- the maximum width of formatted text (including indent).
    """
    width = width - indent
    out = []
    stack = [word for word in text.replace("\n", " ").split(" ") if word]
    while stack:
        line = ""
        while stack:
            if len(line) + len(" " + stack[0]) > width: break
            if line: line += " "
            line += stack.pop(0)
        out.append(" "*indent + line)
    return "\n".join(out)

if len(sys.argv) != 2:
    print "Error: No input file"
    exit()

f=open(sys.argv[1], 'r')

df = f.read().split("\n")
strin = ""
name = ""
names = []
tweets = []
for l in df:
    match = re.search( "<(\w*)> *([\w\W]*)", l)
    if match:
         names.append(name)
         tweets.append(strin)
         name = match.group(1)
         strin = match.group(2)

    else:
         strin = strin + " " + l.strip()

# All the names are stored in an array called names, and the tweets in an array called tweets
# You cay customize the output the way you like. This method was the best for me

print "                                        TWITTER FEED"
print "                                        Last update: " + strftime("%H:%M:%S")
print "                                       ================================================="
for i in range(1,12):
    ff = format( tweets[i], 50, 100 )
    print "                                        " + names[i] + ":"
    print ff
    print ""

The final Conky output looks like (blurred for privacy):

I’ve been trying to experiment with Video4Linux.  I just bought a new web camera that is plug-n-play and works on linux.  So I tried to find some code that lets me get the webcamera data.  I found one example that is provided by Video4Linux so I modified it and encapsulated it into a C++ class file.  The class allows you to grab the webcam data in either YUV or RGB format, and then process the data however you want. I created an example that grabs the data and then prints out a series of bitmap images.

If you are using git, you can type the following to download the code.

git clone git://github.com/rabidgeek/linuxWebcam

Or if you do not use git and want a direct download, click the following

Download zip
Download tar

Also, here’s Schrodinger’s equation for no apparent reason.

(1)  

Equation 1 is Schrodinger’s equation