Battery Internal Resistance

Vdrop = Vbatt*(Rbatt/(RL+Rbatt))

Rbatt = Vdrop*(RL/(Vdrop+Vbatt))

Vdrop is the difference in your two readings above

Vbatt is the open circuit voltage measured above

RL is the resistor you load the battery with

Rbatt is the battery internal resistance you're looking for

http://answers.yahoo.com/question/index?qid=20080214215136AACzjrF

http://www.rcgroups.com/forums/showthread.php?t=980290

http://nqrc.com/?vp=PLD-IRM-004

Microsoft remote desktop connection tips

Ctrl + Alt + End
Send Ctrl + Alt + Delete to remote session; Brings up the Windows Security dialog box.

Ctrl + Alt + Break
Switches the client between a window and full screen.

--- LESS USEFUL

Alt + Page Up
Switches between programs from left to right.

Alt + Page Down
Switches between programs from right to left.

Alt + Insert
Cycles through the programs in the order they were started.

Alt + Home
Displays the Start menu.

Ctrl + Alt + Pause
Toggles between full screen and windowed mode
(note that this does not set the client desktop to the correct size)

Alt + Del
Displays the Windows menu

Ctrl + Alt + Num -
Places a snapshot of the client’s active window on the clipboard

Ctrl + Alt + Num +
Places a snapshot of the client’s entire desktop area on the clipboard

Ctrl+Alt+Shift+Home
To invoke task manager for nested terminal services sessions (two levels deep)

http://www.online-tech-tips.com/windows-xp/ctrl-alt-del-remote-desktop/

Bash script- Kill a process if it runs too long

#!/bin/bash

# Can hang (google actually doesn't respond to ab useragent)
ab -c20 -n100 http://www.google.com

# get pid from previous command
pid=$!

# Wait for 10 seconds then send an interrupt
# apachebench will produce output if ctrl-c (or kill -2)
sleep 10 && kill -2 $pid > /dev/null 2>&1&

wait $pid

Bash scripting reference card

Advanced bash scripting

http://tldp.org/LDP/abs/html/index.html

 

Reference card (essential tool for bash scripting)

http://tldp.org/LDP/abs/html/refcards.html

 

Rxvt is a better terminal for cygwin

@echo off
C:
chdir C:\cygwin\bin
set EDITOR=vi
set VISUAL=vi
set CYGWIN=codepage:oem tty binmode title
rxvt -sr -sl 10000 -fg white -bg black -fn fixedsys -fb fixedsys -tn cygwin -e bash --login -i

http://c2.com/cgi/wiki?BetterCygwinTerminal

http://www.khngai.com/emacs/bash.php

Mounting an ISO in Windows 7

The utility that we will use is called Virtual Clone Drive. This utility will let you mount .ISO, .CCD, .DVD, .IMG, .UDF and .BIN files. Download the utility and start the setup process.

Alternatives

• Virtual CD-ROM (Microsoft) – This utility does not work in Windows Vista
• MagicDisk – This is a nice, free utility with more features, but it's not quite as simple to use.
• Alcohol 52% – Free version of Alcohol 120, but it bundles a browser toolbar that they claim isn't spyware. It's unacceptable.
• Daemon Tools – Well known tool, but the latest version installs spyware on your computer, and the old version doesn't work in Vista or 7.

http://www.howtogeek.com/howto/windows-vista/mount-an-iso-image-in-windows-vista/

File Synchronization

Opensource

http://www.cis.upenn.edu/~bcpierce/unison/

Free for light useage

http://www.allwaysync.com/

WinSCP

http://winscp.net/eng/index.php

Using rsync

rsync -auz /src/foo hostB:/dest
rsync -auz hostB:/dest/foo /src

The first command pushes all the files that are newer on hostA to hostB. The second command will pull all the files that are newer on hostB to hostA. The critical options are: 
- when copying, you must preserve file modification times. "-a" does this and other things; if you want to preserve just the modification times, use "-t" instead.
- you must skip any files that are newer on the destination: "-u" does this.

http://forums11.itrc.hp.com/service/forums/questionanswer.do?admit=109447626+1264860929544+28353475&threadId=1278777