links for 2010-04-14

A memristor /ˈmɛmrɨstər/ (a portmanteau of "memory resistor") is any of various kinds of passive two-terminal circuit elements that maintain a functional relationship between the time integrals of current and voltage. This function, called memristance, is similar to variable resistance. Specifically engineered memristors provide controllable resistance, but such devices are not commercially available. Other devices like batteries and varistors have memristance, but it does not normally dominate their behavior. The definition of the memristor is based solely on fundamental circuit variables, similarly to the resistor, capacitor, and inductor. Unlike those three elements, which are allowed in linear time-invariant or LTI system theory, memristors are nonlinear and may be described by any of a variety of time-varying functions of net charge. (Via BBC's material world)

Wikileaks is a Sweden-based organization that publishes anonymous submissions and leaks of sensitive documents from governments and other organizations, while preserving the anonymity of its sources. Its website, launched in 2006, is run by The Sunshine Press. The organization has stated it was founded by Chinese dissidents, as well as journalists, mathematicians, and start-up company technologists from the U.S., Taiwan, Europe, Australia, and South Africa. Newspaper articles describe Julian Assange, an Australian journalist and Internet activist, as its director. Within a year of its launch, the site said its database had grown to more than 1.2 million documents. It has won a number of new media awards for its reports. Via @podsandblogs