Wiki Transimission Line

Wikipedia Transmission Line

http://en.wikipedia.org/wiki/Transmission_line

"However, when the voltage changes in a time interval comparable to the time it takes for the signal to travel down the wire, the length becomes important and the wire must be treated as a transmission line. Stated another way, the length of the wire is important when the signal includes frequency components with corresponding wavelengths comparable to or less than the length of the wire."

"A common rule of thumb is that the cable or wire should be treated as a transmission line if the length is greater than 1/10 of the wavelength. At this length the phase delay and the interference of any reflections on the line become important and can lead to unpredictable behavior in systems which have not been carefully designed using transmission line theory."

What is stray capacitance?

What is stray capacitance?
http://www.edaboard.com/thread179679.html

Wiki
http://en.wikipedia.org/wiki/Capacitance#Stray_capacitance

Convert .gif to png under Linux

convert image.gif image.png

http://superuser.com/questions/71028/batch-converting-png-to-jpg-in-linux

ubuntu backup solution

help center
https://help.ubuntu.com/community/BackupYourSystem

rsync and grsync
https://help.ubuntu.com/community/rsync#Grsync

CUDA 4.2 install in 12.04

CUDA 4.2 install in 12.04
http://forums.nvidia.com/index.php?showtopic=231150

undefined reference to 'gluErrorString' trouble installing cuda on ubuntu 12.04:
Solution
http://forums.nvidia.com/index.php?showtopic=224163

cannot open libcudart.so.4
solution:
http://laurencedawson.com/upgrading-to-cuda-4.0

ldconfig

How to install GCC 4.7 in Ubuntu 12.04

http://www.shibuvarkala.com/

How to install LAMP in Ubuntu

http://ubuntublog.org/installing-lamp-ubuntu.htm

Customizing the sidebar in beamer

Marburg beamer
http://tex.stackexchange.com/questions/46874/customizing-the-sidebar-in-beamer

How to hide other SubSubsections in sidebar of beamerclass
http://tex.stackexchange.com/questions/51889/how-to-hide-other-subsubsections-in-sidebar-of-beamerclass