direct driven antenna
41astronomy — /euh stron euh mee/, n. the science that deals with the material universe beyond the earth s atmosphere. [1175 1225; ME astronomie ( < AF) < L astronomia < Gk. See ASTRO , NOMY] * * * I Science dealing with the origin, evolution, composition,… …
42Ground (electricity) — In electrical engineering, ground or earth may be the reference point in an electrical circuit from which other voltages are measured, or a common return path for electric current, or a direct physical connection to the Earth. A typical earthing… …
43Nuclear power phase-out — A nuclear power plant at Grafenrheinfeld, Germany. Chancellor Angela Merkel s coalition announced on May 30, 2011, that Germany’s 17 nuclear power stations will be shut down by 2022, in a policy reversal following Japan s Fukushima Daiichi… …
44General relativity — For a generally accessible and less technical introduction to the topic, see Introduction to general relativity. General relativity Introduction Mathematical formulation Resources …
45Microwave oven — A modern microwave oven …
46WITI (TV) — For other uses, see WITI (disambiguation). WITI Milwaukee, Wisconsin Branding FOX6 Milwaukee (general) FOX6 News …
47Lobe switching — is a method used on early radar sets to improve tracking accuracy. It used two slightly separated antenna elements to send the beam slightly to either side of the midline of the antenna, switching between the two to find which one gave the… …
48navigation — navigational, adj. /nav i gay sheuhn/, n. 1. the act or process of navigating. 2. the art or science of plotting, ascertaining, or directing the course of a ship, aircraft, or guided missile. [1520 30; < L navigation (s. of navigatio) a voyage.… …
49History of Chrysler — 1936 Chrysler Airflow Series C 9 This article is about the History of Chrysler, an American automobile manufacturer. Contents 1 History …
50Solar sail — Solar sails (also called light sails or photon sails, especially when they use light sources other than the Sun) are a proposed form of spacecraft propulsion using large membrane mirrors. Radiation pressure is about 10 5 Pa at Earth s distance… …
