Author Archive
3-SAT polynomial time solution? If true then P==NP
January 20, 2011 | 
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Complexity classes
One of the biggest questions in the CS always was (is) if P==NP, or P!=NP.
I just read a post announcing an article called “Non-Orthodox Combinatorial Models Based on Discordant Structures” by the author V. F. Romanov (http://arxiv.org/abs/1011.3944).
According to the author:
The article presents a constructive proof of effective resolvability of 3-SAT problem, accompanied by description of a polynomial algorithm created for the named purpose.
If this statement is correct, and the algorithm really solves the 3-SAT problem in polynomial time, then P==NP (since 3-SAT is NP-complete). Although the article, in my opinion, looks too draft for such an important topic, if it will be proven correct, one of the biggest findings in CS will be unveiled.
Lets see..
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FPGA as a processor?
I just read an article about some research being done on University of Glasgow. Researchers placed/programmed (more than) 1000-cores on an FPGA (about FPGA). Each core is supposed to have each own dedicated memory (it is not a technical article, so not many technical details were given). According to the article:
The researchers then used the chip to process an algorithm which is central to the MPEG movie format – used in YouTube videos – at a speed of five gigabytes per second: around 20 times faster than current top-end desktop computers.
You can read the article here.
Really simple batch renaming in Linux
While working on the photos section of trigonakis.com, I wanted to batch rename some photos, so after the renaming their new name would be prefix_i, where i is a incremental value. The following (stupidly) simple bash script provides the desired functionality:
#!/bin/bash INDEX=1 for i in *.$1; do echo item $INDEX: "$i" renamed to $2_$INDEX.$1 mv "$i" $2_$INDEX.$1 let INDEX=INDEX+1 done |
Usage:
#make the script executable chmod +x scriptname.sh #move the folder containing the files to be renamed mv from_path/scriptname.sh to_path/ #run the script ./scriptname.sh FILE_EXTENSION NAME_PREFIX #example: ./rnm.sh JPG photo |
New Weblog, First Post
Distributed Life
Welcome to Distributed Life blog. As the title suggests, this will be a technology (computer science mostly) related blog. My focus will be on Distributed Systems, since it is my area of interest, but I will also write some posts about Opera browser and generic technology/Internet topics that I find (extremely) interesting.
Topics’ Sources
The topics you will find here will be mostly drawn from my everyday (academic and not) experiences and from other interesting posts or sites that I meet. The Opera related topics will be focused so that they will explain to you why Opera browser is unique (don’t worry I won’t be biased towards Opera. I am the first to say that Opera still has some major problems..)
Posting Frequency
As I said, the posts will be drawn from interesting (or to be precise, from what I consider interesting :-P) topics, so the frequency that I will write new posts will vary from daily to weekly+. Anyaway, this weblog is not meant to be a generic tech one.. who needs one more of these!
Hope you will enjoy! Thank you for reading..