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61Radio communications during the September 11 attacks — This article reviews some of the details of radio communications at the September 11, 2001 World Trade Center attacks. [The purpose of revealing the operational details in this article is to allow operators of other communications networks and… …
62insurance — /in shoor euhns, sherr /, n. 1. the act, system, or business of insuring property, life, one s person, etc., against loss or harm arising in specified contingencies, as fire, accident, death, disablement, or the like, in consideration of a… …
63Derailment — For the use of the term in psychiatry, see derailment (thought disorder). Derailed Tatra T3 tram in Brno, Czech Republic …
64environmental works — ▪ civil engineering Introduction infrastructure that provides cities and towns with water supply, waste disposal, and pollution control services. They include extensive networks of reservoirs, pipelines, treatment systems, pumping stations …
65High performance liquid chromatography — Infobox chemical analysis name = High performance liquid chromatography caption =A HPLC. From left to right: A pumping device generating a gradient of two different solvents, a steel enforced column and an apparatus for measuring the absorbance.… …
66sedimentary rock — Rock formed at or near the Earth s surface by the accumulation and lithification of fragments of preexisting rocks or by precipitation from solution at normal surface temperatures. Sedimentary rocks can be formed only where sediments are… …
67Metamaterial 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… …
68Electronic 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… …
69Tire uniformity — refers to the dynamic mechanical properties of pneumatic tires as strictly defined by a set of measurement standards and test conditions accepted by global tire and car makers. These measurement standards include the parameters of radial force… …
70Otto Julius Zobel — Born October 20, 1887(1887 10 20) Ripon, Wisconsin Died January 1970 (age 82) Morristown, New Jersey …
