Computer bugs

The 16 bit integer overflow on Comair sheduling system

Code Browsers

How To Ask Questions The Smart Way

If only more people would take this to heart

How To Ask Questions The Smart Way

Terminal Software

The death of RS232 has been greatly exagerated.

This looks like a good tool for working with it.

Terminal Software

How to install OpenSSH sshd server and sftp server on a Windows 2000 or Windows XP or Windows Server 2003

How to install OpenSSH sshd server and sftp server on a Windows 2000 or Windows XP or Windows Server 2003

cvs commands

I don't know how many times I've setup CVS repositories, but invariably a year later when I need to setup another one I've forgotten the commands. I thought I was going to have to peruse the CVS intro material again, but luckily I had scratched these down in my notebook, last year. I figure posting them here will keep them alive a little longer for me.

Init Repository
cvs -d /usr/rsanders/cvsrepo init
add to .bashrc : export CVSROOT=/usr/rsanders/cvsrepo

Import Source
cvs import -m "initial import of source xyz" xyz COMPANY_NAME COMPANY_NAME_0
from the directory xyz, puts all files and dirs in and underneath xyz into version control with a module (folder) name of xyz. Then check the source out while keeping what you imported around
cd ..
mv xyz xyz.old
cvs co xyz


Remote Repository
alias scvs="cvs -d :ext:rsanders@somecomputer.net:/usr/rsanders/cvsrepo"

low power/low throughput wireless PAN

57 ma current consumption during transmit. 250 kbps.

CompXs Zigbee wireless

a short list of math software

The story of Graphing Calculator's development is quite harrowing.

Graphing Calculator

Graph Pad Prism

APG (Automated Pasword Generator)

Random password generator library, also web gateway so you can try it out.

Ability to generate random, but pronounceable, passwords.
Good stuff.

http://www.adel.nursat.kz/apg/

backup for your backups

I don't take backup seriously. Most poeople don't either.

I'm starting to worry about it though.

PAR is a file format and system for using Reed-Solomon type error correcting codes to backup your backups. Even if some of your data burned onto a CD goes bad you can use the PAR file to fix it.

Intro to PAR:
http://www.warezfaq.com/allaboutpar.htm

quickpar
http://www.quickpar.org.uk/index.htm

Radio maddness

Digital Radio in the AM bands. FM quality with AM reach, plus digital goodies like song/artist/album info.
http://www.drm.org/whydigital/globwhats.htm
http://drm.sourceforge.net/

Micropower FM broadcasting:
http://www.freeradio.org/index.php?pagename=frb/about.html

An opensource (firmware and schematics too!) Portable music player:
http://www.neurosaudio.com/
http://open.neurosaudio.com/

compact RF sheilding boxes

http://www.probestar-usa.com/products/shielded.htm

Agilent also offers something similar

RC Time Constant Calculator

This is a helpful little calculator, but you when you start adding in the manufacturing tolerances (especially for capacitors) you realize that it's difficult to use this circuit for delays on the order of .3 seconds.

RC Time Constant Calculator

EEsof ADS Momentum Tutorial

EEsof ADS Momentum Tutorial

commodity computing

Virtual Private Servers are an interesting concept to go along with CPU intesive genetic programming runs. Can use them to scale up quickly.

Web Hosting by GlobalServers

http://www.sun.com/service/utility/N1gridppu.html

https://www.rackforce.com/index.php?do=ddspro

http://www.x2hosting.com/

http://www.linode.com/products/linodes.cfm

Ten Most Wanted Design Bugs

Ten Most Wanted Design Bugs

Great list of interface design bugs, with some proposed fixes.

I especially like the "add a hint to why this control is greyed out" solution.