seismic efficiency
41United States — a republic in the N Western Hemisphere comprising 48 conterminous states, the District of Columbia, and Alaska in North America, and Hawaii in the N Pacific. 267,954,767; conterminous United States, 3,022,387 sq. mi. (7,827,982 sq. km); with… …
42Metamaterial antenna — This Z antenna tested at the National Institute of Standards and Technology is smaller than a standard antenna with comparable properties. Its high efficiency is derived from the Z element inside the square that acts as a metamaterial, greatly… …
43Richmond-San Rafael Bridge — Infobox Bridge bridge name= Richmond San Rafael Bridge caption= The Richmond San Rafael Bridge from its western terminus. official name= John F. McCarthy Memorial Bridge also known as= carries= 4 lanes (2 WB on upper level, 2 EB on lower) of I… …
44Sitakunda Upazila — Infobox of upazilas native name = Sitakunda locator position = right latd = 22.6167 longd = 91.6611 division name = Chittagong Division district = Chittagong District population as of = 1991 population total = 274903 population density = 568 area …
45Panama Canal — The Panama Canal is a man made canal in Panama which joins the Pacific and Atlantic oceans. One of the largest and most difficult engineering projects ever undertaken, it had an enormous impact on shipping between the two oceans, replacing the… …
46Energy harvesting — (also known as Power harvesting or energy scavenging ) is the process by which energy is captured and stored. Frequently this term is applied when speaking about small autonomous devices, like those used in sensor networks. A variety of different …
47Nuclear power in the United Kingdom — United Kingdom energy related articles Government energy policy Energy use and conservation Nuclear power Solar power Wind power Energy efficiency in …
48Teller–Ulam design — The basics of the Teller–Ulam design. Radiation from a primary fission bomb compresses a secondary section containing both fission and fusion fuel. The compressed secondary is heated from within by a second fission explosion. The Teller–Ulam… …
491979 energy crisis — Further information: 1979 world oil market chronology 1979 oil crisis Graph of Top Oil Producing Counties, showing drop in Iran s Production [1] …
50Petroleum politics — Argentine president Néstor Kirchner and Venezuelan President Hugo Chávez discuss the Gran Gasoducto del Suran energy and trade integration project for South America. They met on November 21, 2005 in Venezuela. Petroleum politics have been an… …
