Tuesday, September 28, 2010

energy resolution for proportional counter (also for asca gis)

Proportional Counters with Enhanced Energy Resolution

The first gas scintillation proportional counter had an energy resolution of Delta E/E = 0.20/sqrt(E) which surpassed the old avalanche detectors by a factor of two. In less than 10 years, GSPC spectrometers were major players on X-ray missions.

Sunday, September 26, 2010

ssh login without password

mac setup (not working to me yet).

http://www.stocksy.co.uk/articles/Mac/ssh_on_mac_os_x/


linux (working):
please note the file is authorized_key2 instead of authorized_key

http://blog.johnjosephbachir.org/2004/06/25/sshssh2-no-password-authentication/
http://www.auzsoft.net/item/170

use the command "ssh -v" to check the version

I found this one, which also looks good.

http://www.mtu.net/~engstrom/ssh-agent.php

Saturday, September 18, 2010

mcp manual

http://manuals.info.apple.com/en_US/MacBook_Pro_13inch_Mid2010.pdf

macbook pro 13 inch manual (2010 version)


How to remove the memory: link below
http://www.memoryupgrade.pro/macbook-pro-memory.html

Also the manual on P44: how to remove the memory

Sunday, September 12, 2010

find a matched line index in perl

foreach(0..$#array2){

chomp($_);
#print "$_\n";

if($array2[$_]=~/model\s+/i){
$line_index=$_;
print "$line_index, and $array2[$_]";
next;
}


}

Monday, September 06, 2010

rxte asm flux to crab flux.

Crab nebula flux is about 75 ASM c/s (75 asm c/s = 1 crab)

http://xte.mit.edu/asmlc/ASM.html

Saturday, September 04, 2010

battery button on macbook pro.

http://support.apple.com/kb/HT3205