electro mechanical systems ltd
91Natural scientific research in Canada — This article outlines the history of natural scientific research in Canada, including mathematics, physics, astronomy, space science, geology, oceanography, chemistry, biology, medical research and psychology. The social sciences are not treated… …
92Mercury(II) cadmium(II) telluride — HgCdTe or mercury cadmium telluride (also cadmium mercury telluride, MCT or CMT) is an alloy of CdTe and HgTe and is sometimes claimed to be the third semiconductor of technological importance after silicon and gallium(III) arsenide. The amount… …
93B-52 Stratofortress — Infobox Aircraft name = B 52 Stratofortress type = Strategic bomber manufacturer = Boeing caption = B 52H, 2nd Bomb Wing, Barksdale AFB, LA designer = first flight =15 April 1952 introduction =February 1955 retired = produced=1952 1962 primary… …
94Compass — This article is about the direction finding instrument used in navigation. For other uses, see Compass (disambiguation). A simple dry magnetic pocket compass …
95British Merchant Navy — The British Merchant Navy, known simply as the Merchant Navy is the maritime register of the United Kingdom, and describes the seagoing commercial interests of UK registered ships and their crews. Merchant Navy vessels fly the Red Ensign, and are …
96Dynamic braking — Norfolk Southern Unit #5348 with a Dynamic brake. The cooling grill for the brake grid resistors is at the top center of the locomotive. Dynamic braking is the use of the electric traction motors of a railroad vehicle as generators when slowing… …
97Naval mine — Polish wz. 08/39 contact mine. The protuberances around the top of the mine, called Hertz horns, are part of the detonation mechanism …
98Electronic voting — Election technology Certification of voting machines Independent Testing Authority (ITA) NVLAP VVSG End to end auditable voting systems Help America Vote Act Independent verific …
99Train horn — Nathan model M5 locomotive air horn Train horns are audible warning devices found on most diesel and electric locomotives. Their primary purpose is to alert persons and animals to the presence of a train, especially when approaching a grade… …
100LGM-30 Minuteman — Type Intercontinental ballistic missile Service hist …
