phase-comparison relay
71Variable-frequency oscillator — A variable frequency oscillator (VFO) in electronics is a oscillator with an oscillation frequency that can be electronically changed (hence, variable).cite book |title=The ARRL Handbook for Radio Amateurs, Sixty Eighth Edition |editor=Larry D.… …
72Electronic amplifier — A practical amplifier circuit An electronic amplifier is a device for increasing the power of a signal. It does this by taking energy from a power supply and controlling the output to match the input signal shape but with a larger amplitude. In… …
73Olympic Games — For the 776 BC to AD 393 Games see Ancient Olympic Games. For the most recent Summer Games in Beijing, see 2008 Summer Olympics. For the most recent Winter Games in Vancouver, see 2010 Winter Olympics. For the next Summer Games in London, see… …
74Destiny (Star Trek: Deep Space Nine) — Destiny Star Trek: Deep Space Nine episode The Defiant s shuttle escorts 3 comet fragments out of the wormhole …
75Social software — encompasses a range of software systems that allow users to interact and share data. This computer mediated communication has become very popular with social sites like MySpace and Facebook, media sites like Flickr and YouTube, and commercial… …
76London 2012 Olympic bid — Olympic bid|2012|Summer winner = London runner up = Paris shortlisted1 = Madrid shortlisted2 = Moscow shortlisted3 = New York City logo = fullname = London, United Kingdom committee = British Olympic Association (BOA) history = 1908 Summer… …
77HiRISE — The High Resolution Imaging Science Experiment camera is a camera on board the Mars Reconnaissance Orbiter. The 65 kg, $40 million (USD) instrument was built under the direction of the University of Arizona s Lunar and Planetary Laboratory by… …
78Danforth Campus — Washington University in St. Louis Danforth Campus Style Collegiate gothic Erected …
79Portugal — /pawr cheuh geuhl, pohr /; Port. /pawrdd too gahl /, n. a republic in SW Europe, on the Iberian Peninsula, W of Spain. (Including the Azores and the Madeira Islands) 9,867,654; 35,414 sq. mi. (91,720 sq. km). Cap.: Lisbon. * * * Portugal… …
80Syria — /sear ee euh/, n. 1. Official name, Syrian Arab Republic. a republic in SW Asia at the E end of the Mediterranean. 16,137,899; 71,227 sq. mi. (184,478 sq. km). Cap.: Damascus. 2. a territory mandated to France in 1922, including the present… …
