single-reflector antenna
71Optical fiber — A bundle of optical fibers A TOSLINK fiber optic audio c …
72MIM-23 Hawk — PAR Pulse Acquisition Radar The pulse acquisition radar is a long range, high altitude search radar.* AN/MPQ 35 (Basic Hawk)The search radar used with the basic HAWK system, with a radar pulse power of 450 kW and a pulse length of 3 µs, a Pulse… …
73John D. Kraus — Born June 28, 1910(1910 06 28) Ann Arbor, Michigan Died July 18, 2004(2004 07 18) (aged 94) …
74astronomical observatory — any structure containing telescopes and auxiliary instruments with which to observe celestial objects. Observatories can be classified on the basis of the part of the electromagnetic spectrum in which they are designed to observe. The… …
75building construction — Techniques and industry involved in the assembly and erection of structures. Early humans built primarily for shelter, using simple methods. Building materials came from the land, and fabrication was dictated by the limits of the materials and… …
76Yakovlev Yak-3 — infobox Aircraft name =Yak 3 type =Fighter manufacturer =Yakovlev caption = designer = first flight =12 April 1941 (I 30) introduced =1944 retired =1945 status = primary user =Soviet Air Force more users =Normandie Niemen Air Force of the Polish… …
77STS-133 — Mission insignia Mission statistics Mission name STS 133 Space shuttle Discovery …
78Interference (wave propagation) — Two point interference in a ripple tank. In physics, interference is the phenomenon in which two waves superpose each other to form a resultant wave of greater or lower amplitude. Interference usually refers to the interaction of waves that are… …
79Radiator — Radiators and convectors are types of heat exchangers designed to transfer thermal energy from one medium to another for the purpose of cooling and heating. The majority of radiators are constructed to function in automobiles, buildings, and… …
80Time Reversal Signal Processing — is a technique for focusing waves. A Time Reversal Mirror (TRM) is a device that can focus waves using the time reversal method. TRMs are also known as time reversal mirror arrays, as they are usually arrays of transducers, but they do not have… …
