Discrete-time signal processing has appeared to be one of the major momenta to the advances of science and engineering over the past several decades be- cause of the rapid progress of digital and mixed-signal integrated circuits in processing speed, functionality, and cost effectiveness. In many science and engineering applications, the signals of interest are distorted by an unknown physical s…
Social networking forms an important part of online activities of Web users. Web sites such as Facebook, MySpace and Orkut have millions of users using them everyday. However, these sites present two problems. Firstly, these sites form information silos. Information on one site is not usable in the others. Secondly such sites do not allow users much control over how their personal information i…