parabolic sheet

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• Parabolic antenna — A parabolic satellite communications antenna at Erdfunkstelle Raisting, the biggest facility for satellite communication in the world, in Raisting, Bavaria, Germany. It has a Cassegrain type feed. A parabolic antenna is an antenna that uses a… …   Wikipedia

• Grote Reber — (December 22, 1911 ndash; December 20, 2002), was an amateur astronomer and pioneer of radio astronomy. He was instrumental investigating and extending Karl Jansky s pioneering work, and conducted the first sky survey in the radio… …   Wikipedia

• spin|ner — «SPIHN uhr», noun. 1. a person, animal, or thing that spins: »Figurative. I am a spinner of long yarns (Hawthorne). 2. a revolving hook or lure, especially a spoon, used in trolling or casting. 3. a football maneuver or play in which the player… …   Useful english dictionary

• building 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… …   Universalium

• Dune — For other uses, see Dune (disambiguation). Erg Chebbi, Morocco …   Wikipedia

• Horn antenna — Pyramidal microwave horn antenna, with a bandwidth of 0.8 to 18 GHz. A coaxial cable feedline attaches to the connector visible at top. This type is called a ridged horn; the curving fins visible inside the mouth of the horn increase the antenna… …   Wikipedia

• Orbital eccentricity — This article is about eccentricity in astrodynamics. For other uses, see Eccentricity (disambiguation). An elliptic Kepler orbit with an eccentricity of 0.7 (red), a parabolic Kepler orbit (green) and a hyperbolic Kepler orbit with an… …   Wikipedia

• Solar thermal energy — Solar thermal system for water heating in Santorini, Greece …   Wikipedia

• Carolina Bay — Carolina bays are elliptical depressions concentrated along the Atlantic seaboard within coastal Delaware, Maryland, New Jersey, North Carolina, South Carolina, Virginia, Georgia, and northcentral Florida (Prouty 1952, Kaczorowski 1977). In… …   Wikipedia

• Concentrated solar power — The PS10 Solar Power Plant concentrates sunlight from a field of heliostats onto a central solar power tower. Concentrated solar power (CSP) systems use mirrors or lenses to concentrate a large area of sunlight, or solar thermal energy, onto a… …   Wikipedia

• Rolling (metalworking) — A rolling schematic In metalworki …   Wikipedia