parabolic geometry
71Microphone — For the indie film, see Microphone (film). Microphones redirects here. For the indie band, see The Microphones. A …
72Trajectory — is the path a moving object follows through space. The object might be a projectile or a satellite, for example. It thus includes the meaning of orbit the path of a planet, an asteroid or a comet as it travels around a central mass. A trajectory… …
73Slotted waveguide — segment reflector. For comparison, in the parabolic type of antenna a feedhorn at the end of a waveguide directs a conical beam of output energy toward the reflector, whence it is focused into a narrow collimated beam. Reflected energy from the… …
74Sulfur lamp — The sulfur lamp (also sulphur lamp) is a highly efficient full spectrum electrodeless lighting system whose light is generated by sulfur plasma that has been excited by microwave radiation. The technology was developed in the early 1990s, but,… …
75Kinematics — Classical mechanics Newton s Second Law History of classical mechanics  …
76Envelope (mathematics) — In mathematics, an envelope of a family of manifolds (especially a family of curves) is a manifold that is tangent to each member of the family at some point.Envelope of a family of curvesThe simplest formal expression for an envelope of curves… …
77Hamilton–Jacobi equation — In physics, the Hamilton–Jacobi equation (HJE) is a reformulation of classical mechanics and, thus, equivalent to other formulations such as Newton s laws of motion, Lagrangian mechanics and Hamiltonian mechanics. The Hamilton–Jacobi equation is… …
78Track transition curve — The red Euler spiral is an example of an easement curve between a blue straight line and a circular arc, shown in green …
79Schubert variety — In mathematics, a Schubert variety is a certain subvariety of a Grassmannian, usually with singular points. Described by means of linear algebra, a typical example consists of the k dimensional subspaces V of an n dimensional vector space W ,… …
80Over-arcing — is a nearly self descriptive term which denotes a radial or parabolic like arc which is extended, for whatever reason, beyond the path of which it was either intended to follow, or could have followed, given that a more efficient means had been… …
