Iris recognition relies upon the fact that every individuals retina has a unique structure. The iris landscape is composed of a corona, crypts, filaments, freckles, pits radial furrows and striatations. Iris scanning is considered a particularly accurate identification technology because the characteristics of the iris do not change during a persons lifetime, and because there are several hundred variables in an iris which can be measured. In addition, iris scanning is fast: it does not take longer than one or two seconds.
These are characteristics which have made iris scanning an attractive technology for high-security applications such as prison surveillance. Iris technology is also used for online identification where it can substitute identification by password. As in other biometric technologies, the use of iris scanning for the protection of privacy is a two-edged sword. The prevention of identity theft applies horizontally but not vertically, i.e. in so far as the data retrieval that accompanies identification and the data body which is created in the process has nothing to do with identity theft.
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Probably the most important contributor concerning the theoretical basis for the digital computers that were developed in the 1940s was
The onset of the Second World War led to an increased funding for computer projects, which hastened technical progress, as governments sought to develop computers to exploit their potential strategic importance.
By 1941 the German engineer Konrad Zuse had developed a computer, the Z3, to design airplanes and missiles. Two years later the British completed a secret code-breaking computer called Colossus to
Also spurred by the war the Electronic Numerical Integrator and Computer (ENIAC), a general-purpose computer, was produced by a partnership between the U.S. government and the University of Pennsylvania (1943). Consisting of 18.000
Concepts in computer design that remained central to computer engineering for the next 40 years were developed by the Hungarian-American mathematician
Characteristic for first generation computers was the fact, that instructions were made-to-order for the specific task for which the computer was to be used. Each computer had a different
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The fact that an individual's identity is expressed not only by the way he/she looks or sounds, but also by the manner of walking is a relatively new discovery of in biometrics.
Unlike the more fully developed biometric technologies whose scrutiny is directed at stationary parts of the body, gait recognition has the added difficulty of having to sample and identify movement. Scientists at the University of Southampton, UK (
Another model considers the shape and length of legs as well as the velocity of joint movements. The objective is to combine both models into one, which would make gait recognition a fully applicable biometric technology.
Given that gait recognition is applied to "moving preambulatory subjects" it is a particularly interesting technology for surveillance. People can no longer hide their identity by covering themselves or moving. Female shop lifters who pretend pregnancy will be detected because they walk differently than those who are really pregnant. Potential wrongdoers might resort walking techniques as developed in Monty Pythons legendary "Ministry of Silly Walks" (
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Regarding the dimension of their financial and human resources commercial media companies are at any rate much more powerful players than their independent counterparts. Still those reply with an extreme multiplicity and diversity. Today thousands of newsgroups, mailing-list and e-zines covering a wide range of issues from the environment to politics, social and human rights, culture, art and democracy are run by alternative groups.
Moreover independent content provider have started to use digital media for communication, information and co-ordination long before they were discovered by corporate interest. They regularly use the Internet and other networks to further public discourse and put up civic resistance. And in many cases are very successful with their work, as initiatives like widerst@ndMUND's (AT) co-ordination of the critics of the participation of the Freedom Party in the Austrian government via mailing-lists, an online-magazine and discussion forums, show.
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MIRALab is a research laboratory attached to the University of Geneva. Its motto is "where research meets creativity". MIRAlab's objective is to model human functionalities, such as movement or facial expression, in a realistic way.
Nadia Thalman is director of
b. December 26, 1791, London, England
d. October 18, 1871, London, England
English mathematician and inventor who is credited with having conceived the first automatic digital computer. The idea of mechanically calculating mathematical tables first came to Babbage in 1812 or 1813. Later he made a small