I love Phusion Passenger. It takes away most of the pain from deploying. Instead of having to mess around with lengthy apache config files, you can just upload.
Signo is a website devoted to Applied Semiotic Theories. The study of Signs, Semiotics is the primary purpose of this site and explains various semiotic theories.
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C. Lagoze, и J. Hunter. Proc. of the Int. Conf. on Dublin Coreand Metadata Applications, стр. 160--176. National Institute of Informatics, Tokyo, Japan, (2001)
C. Matuszek, J. Cabral, M. Witbrock, и J. Deoliveira. Proceedings of the 2006 AAAI Spring Symposium on Formalizing and Compiling Background Knowledge and Its Applications to Knowledge Representation and Question Answering, стр. 44--49. (2006)