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A small triangular prism was placed at the aft end of this flat area. The prism was split into two halves, left and right, to form two flaps, sometimes referred to as a "split-windward flap". To pitch the vehicle, the flaps were both raised into the airstream and caused the nose to move in the opposite direction and thereby produce lift ...
In arithmetic, a complex-base system is a positional numeral system whose radix is an imaginary (proposed by Donald Knuth in 1955 [1] [2]) or complex number (proposed by S. Khmelnik in 1964 [3] and Walter F. Penney in 1965 [4] [5] [6]).
Prism dioptre D: Dioptres DC: Dioptres cylinder DNA: Did not attend DOB: Date of birth DS: Dioptres sphere DV: Distance vision DVD: Dissociated vertical deviation EF: Eccentric fixation FB: Foreign body FD: Fixation disparity FF: Foveal fixation FHG: Family history of glaucoma: FMH: Family medical history FOH: Family ocular history F/U: Follow ...
Porro prisms are most often used in pairs, forming a double Porro prism. A second prism rotated 90° with respect to the first, is placed such that light will traverse both prisms. The net effect of the prism system is a beam parallel to but displaced from its original direction, with the image rotated 180°.
Associahedron K 5 (front) Associahedron K 5 (back) K 5 is the Hasse diagram of the Tamari lattice T 4. The 9 faces of K 5 Each vertex in the above Hasse diagram has the ovals from the 3 adjacent faces.
In mathematics, a base (or basis; pl.: bases) for the topology τ of a topological space (X, τ) is a family of open subsets of X such that every open set of the topology is equal to the union of some sub-family of .
Offutt Air Force Base / ˈ ɒ f ʌ t / (IATA: OFF, ICAO: KOFF, FAA LID: OFF) is a U.S. Air Force base south of Omaha, adjacent to Bellevue in Sarpy County, Nebraska.It is the headquarters of the U.S. Strategic Command (USSTRATCOM), the 557th Weather Wing, and the 55th Wing (55 WG) of the Air Combat Command (ACC), the latter serving as the host unit.
Cyclotropia cannot be corrected with prism spectacles in the way other eye position disorders are corrected. [12] (Nonetheless two Dove prisms can be employed to rotate the visual field in experimental settings.) For cyclodeviations above 5 degrees, surgery has normally been recommended. [13]