diagonal surface
81Quaternions and spatial rotation — Unit quaternions provide a convenient mathematical notation for representing orientations and rotations of objects in three dimensions. Compared to Euler angles they are simpler to compose and avoid the problem of gimbal lock. Compared to… …
82Las Meninas — This article is about the Diego Velázquez painting. For the Ihor Podolchak film, see Las Meninas (film). Las Meninas Artist Diego Velázquez Year 1656 Type …
83Tessellation — A tessellation of pavement A honeycomb is an example of a t …
84Video camera tube — In older video cameras, before the mid to late 1980s, a video camera tube or pickup tube was used instead of a charge coupled device (CCD) for converting an optical image into an electrical signal. Several types were in use from the 1930s to the… …
85Indentation hardness — tests are used to determine the hardness of a material to deformation. Several such tests exist, wherein the examined material is indented until an impression is formed; these tests can be performed on a macroscopic or microscopic scale. When… …
86Textile manufacturing terminology — The manufacture of textiles is one of the oldest of human technologies. In order to make textiles, the first requirement is a source of fibre from which a yarn can be made, primarily by spinning. (Both fibre and fiber are used in this article.)… …
87List of architectural vaults — The following is a list of arched structures known in architecture as vaults.* Ambulatory vault – the covered portion of the covered passage around a cloister. Often written in the context of an ambulatory vault mosaic. * Annular vault – A Barrel …
88List of capoeira techniques — This is a list of techniques used in capoeira. Capoeira has a variety of different techniques that make use of the hands, feet, legs, arms and head. Both kicks, punches and takedowns are among the offensive movements, but the emphasis is normally …
89National Library of Catalonia — Main entrance …
902! — Boxe BOXE …
