Application of graph theory to real-world social interaction
by Mike on Dec.10, 2010, under Knowledge Base
A paper I wrote a while back but never really got around to tidying up, I found it recently whilst doing some research and thought it has some merit. Abstract: A social graph defines the relationships between individuals in a system and typically is employed to provide targeted content to an individual based on the interaction [...]
Emacs notes
by Mike on Nov.28, 2010, under Knowledge Base
Column editing Awesome! I just found a mini video tutorial that shows me how to do one of the last things I was using UltraEdit for. I use column editing all the time, particularly to re-use data sent to me in a spreadsheet. As I work in cua-mode pretty much all the time, it turns [...]
What’s the difference between a codec and a container or wrapper?
by Mike on Sep.02, 2009, under Knowledge Base
It’s a subject with widespread confusion often leading to only a partial understanding. There are file containers, sometimes called wrappers, that wrap around a number of video and audio tracks. Each of those tracks will have an appropriate video or audio codec. A codec is a concatenation of “coder – decoder”. Basically it’s like using [...]
ASCII reference chart
by Mike on Jan.13, 2009, under Knowledge Base
Decimal Octal Hex Binary Value ——- —– — —— —– 000 000 000 00000000 NUL (Null char.) 001 001 001 00000001 SOH (Start of Header) 002 002 002 00000010 STX (Start of Text) 003 003 003 00000011 ETX (End of Text) 004 004 004 00000100 EOT (End of Transmission) 005 005 005 00000101 ENQ (Enquiry) [...]
Auto login for SSH
by Mike on Jan.13, 2009, under Knowledge Base
Look in your ~/.ssh directory. There should be two files, id_rsa and id_rsa.pub. If not, create them using ssh-keygen -t rsa. Append your local id_rsa.pub to the remote host’s ~/.ssh/authorized_keys. The file mode of ~/.ssh/authorized_keys must be 644. You can assure this with chmod 644 ~/.ssh/authorized_keys For this to work, you might have to change [...]