In addition to localized basis sets, plane-wave basis sets can also be used in quantum-chemical simulations. Typically, a finite number of plane-wave functions are used, below a specific cutoff energy which is chosen for a certain calculation.
Velcro was invented by George de Mestral a Swiss electrical engineer in 1941. This idea of inventing Velcro came to him when one day he returned after a walk from the hills and found cockleburs stuck to his clothes and his dogâs fur.George noticed its natural hook and loop quality and started making a fabric fastener on the same quality.his idea of inventing Velcro came to him when one day he returned after a walk from the hills and found cockleburs stuck to his clothes and his dogâs fur. George noticed its natural hook and loop quality and started making a fabric fastener on the same quality.
The first cordless mouse was shipped in September, 1984, with the Metaphor computer (see the nearby image) of David Liddle and Donald Massaro, former Xerox PARC engineers.evices like the light pen simply took too much time, by repeatedly requiring the user to pick up the pointer, and reach all the way to the screen, which was very tiresome. In 1964, the first prototype of computer mouse was made (see the nearby photo) to use with a graphical user interface (GUI), 'windows'.