flat-topped pulse
1Pulse forming network — A Pulse Forming Network (PFN) accumulates electrical energy over a comparatively long time, then releases the stored energy in the form of a relatively square pulse of comparatively short duration for various pulsed power applications. In… …
2Earth Sciences — ▪ 2009 Introduction Geology and Geochemistry The theme of the 33rd International Geological Congress, which was held in Norway in August 2008, was “Earth System Science: Foundation for Sustainable Development.” It was attended by nearly… …
3agriculture, origins of — Introduction the active production of useful plants or animals in ecosystems that have been created by people. Agriculture has often been conceptualized narrowly, in terms of specific combinations of activities and organisms wet rice production… …
4Nissan CA engine — Manufacturer Nissan Motors Production 1982 1991 Predecessor Nissan L engine Nissan Z engine Successor Nissan SR engine (all except CA16) Nissan GA engine (CA16) …
5mass spectrometry — or mass spectroscopy Analytic technique by which chemical substances are identified by sorting gaseous ions by mass using electric and magnetic fields. A mass spectrometer uses electrical means to detect the sorted ions, while a mass spectrograph …
6United 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… …
7Pink Floyd — This article is about the rock band. For the fictional character, see Pink Floyd (fictional character). Pink Floyd …
8Media and Publishing — ▪ 2007 Introduction The Frankfurt Book Fair enjoyed a record number of exhibitors, and the distribution of free newspapers surged. TV broadcasters experimented with ways of engaging their audience via the Internet; mobile TV grew; magazine… …
9Amy Winehouse — Winehouse redirects here. For the first coffee house in London, see Jamaica Wine House. Amy Winehouse …
10The Mole (U.S. season 2) — The Mole: The Next Betrayal Country of origin  United States No. of episodes 13 …
