earth fault monitoring
51radar — /ray dahr/, n. 1. Electronics. a device for determining the presence and location of an object by measuring the time for the echo of a radio wave to return from it and the direction from which it returns. 2. a means or sense of awareness or… …
52Engineering geology — is the application of the geologic sciences to engineering practice for the purpose of assuring that the geologic factors affecting the location, design, construction, operation and maintenance of engineering works are recognized and adequately… …
53technology, history of — Introduction the development over time of systematic techniques for making and doing things. The term technology, a combination of the Greek technē, “art, craft,” with logos, “word, speech,” meant in Greece a discourse on the arts, both… …
54Seismology — (from Greek gr. σεισμός, seismos , earthquake ; and gr. λογία, logia ) is the scientific study of earthquakes and the propagation of elastic waves through the Earth. The field also includes studies of earthquake effects, such as tsunamis as well… …
55STS-68 — Infobox Space mission mission name = STS 68 insignia = Sts 68 patch.png shuttle = Endeavour launch pad = 39 A launch = September 30, 1994 7:16:00.068am EDT landing = October 11, 1994 1:02:09pm EDT duration = 11 days 5 hours 46 miuntes altitude =… …
56Underground nuclear testing — Preparation for an underground nuclear test at the Nevada Test Site in the 1990s. Nuclear weapons …
57Silverthrone Caldera — Infobox Mountain Name=Silverthrone Caldera Photo= Silverthrone Caldera.jpg Caption= Satellite image of the Silverthrone Caldera. Elevation= Unit m|3160|0 Location= British Columbia, Canada Range= Pacific Ranges Prominence = Unit m|975|0… …
58Pinnacles National Monument — Infobox protected area | name = Pinnacles National Monument iucn category = III caption = locator x = 14 locator y = 86 location = San Benito County Monterey County, California, USA nearest city = Soledad, CA lat degrees = 36 lat minutes = 29 lat …
59Mount Merapi — This article is about Mount Merapi in Central Java. For detailed information on the 2010 eruptions please, see 2010 eruptions of Mount Merapi. For Mount Merapi in West Sumatra, see Mount Marapi. Mount Merapi Gunung Merapi …
60Lightning rod — A lightning rod (USA) or lightning conductor (UK) is a single component in a lightning protection system. In addition to rods placed at regular intervals on the highest portions of a structure, a lightning protection system typically includes a… …
