Berkeley CSUA MOTD:Entry 24828
Berkeley CSUA MOTD
 
WIKI | FAQ | Tech FAQ
http://csua.com/feed/
2026/05/17 [General] UID:1000 Activity:popular
5/17    

2002/5/14-15 [Computer/SW/Languages/Java] UID:24828 Activity:kinda low 75%like:24824
5/14    The (12,8) FEC hamming code has the following 4 correcting bits:
        (format is D8,D7,D6,D5,P4,D4,D3,D2,P3,D1,P2,P1)
        P1 = sum(D1,D2,D4,D5,D7) mod 2
        P2 = sum(D1,D2,D6,D7) mod 2
        P3 = sum(D2,D3,D4,D8) mod 2
        P4 = sum(D5,D6,D7,D8) mod 2.
        How does one derive that? I have (15,11) and (7,4) perfect code
        examples but I don't get how the parity bits are calculated. Thx.
        \_ what class is this?
2026/05/17 [General] UID:1000 Activity:popular
5/17    

You may also be interested in these entries...
2013/5/1-18 [Computer/SW/Languages/Java, Computer/Theory] UID:54669 Activity:nil
5/1     What's the difference between CS and Computer Engineering?
        http://holykaw.alltop.com/top-ten-paying-degrees-for-college-graduates
        \_ One is science and the other is engineering.
        \_ From http://en.wikiquote.org/wiki/Computer_science
           'A folkloric quotation ... states that "computer science is no more
           about computers than astronomy is about telescopes."  The design
	...
2012/12/4-18 [Computer/SW/Languages/Java] UID:54544 Activity:nil
12/4    Holy cow, everyone around me in Silicon Valley is way beyond
        middle class according to Chinni's definition:
        http://en.wikipedia.org/wiki/American_middle_class
        \_ Let's set our goals higher:
           http://en.wikipedia.org/wiki/Upper_middle_class_in_the_United_States
           \_ How about this one?
	...
2012/10/29-12/4 [Science/Disaster, Computer/SW/Languages/Java, Politics/Domestic/President/Bush] UID:54516 Activity:nil
10/29   Go Away Sandy.
        \_ Sorry, Coursera is performing preventive maintenance for this
           class site ahead of Hurricane Sandy. Please check back in 15 minutes.
           class site ahead of Hurricane Sandy. Please check back in 15
           minutes.
        \_ Bitch.
	...
2012/1/18-3/3 [Computer/SW/Languages/Java, Finance/Investment] UID:54290 Activity:nil
1/18    I own a bunch of NFLX stocks bought at several different periods
        (from high $200 all the way down to $80). I dumped a few and
        still have a few. Why the hell is Reid Hastings still making
        $500,000/year? How do I join the pending NFLX Class Action
        Lawsuit?
        \_ Why would you buy stock in a company run by a narcissistic
	...