angle structure
121Symmetry — For other uses, see Symmetry (disambiguation) …
122Espace euclidien — En mathématiques, un espace euclidien est un objet algébrique permettant de généraliser de façon naturelle la géométrie traditionnelle développée par Euclide, dans ses Éléments. Une géométrie de cette nature modélise, en physique classique, le… …
123Skew arch — A skew arch (also known as an oblique arch) is a method of construction that enables an arch bridge to span an obstacle at some angle other than a right angle. This results in the faces of the arch not being perpendicular to its abutments and its …
124Olympic-Wallowa Lineament — Location of the Olympic Wallowa Lineament. Is the OWL an optical illusion? The Olympic Wallowa lineament (OWL) – first reported by cartographer Erwin Raisz in 1945 [1] on a relief map of the continental United States – is a physiographic feature… …
125GROUPES (mathématiques) - Groupes classiques et géométrie — Jusque vers 1800, la géométrie dite «élémentaire» est restée à peu de chose près ce qu’elle était dans l’Antiquité, tant dans sa substance que dans ses méthodes (l’invention de la «géométrie analytique» ayant à peu près exclusivement servi à… …
126Grain boundary — A grain boundary is the interface between two grains in a polycrystalline material. Grain boundaries disrupt the motion of dislocations through a material, so reducing crystallite size is a common way to improve strength, as described by the Hall …
127Optical fiber — A bundle of optical fibers A TOSLINK fiber optic audio c …
128Surface second harmonic generation — is a method for probing interfaces in atomic and molecular systems. In second harmonic generation (SHG), the light frequency is doubled, essentially converting two photons of the original beam of energy E into a single photon of energy 2 E as it… …
