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.
SEPARABLE FASTENING DEVICE Filed May 9, 1958 4 Sheets-Sheet 4 United States Patent 3,009,235 SEPARABLE FASTENING DEVICE George de Mestral, Nyon, Switzerland, assignor to International Velcro Company, EstalL, Nyon, Switzerland, a corporation of Liechtenstein Filed May 9, 1958, Ser.