accurate measurement
81Rangekeeper — Rangekeepers were electromechanical fire control computers used primarily during the early part of the 20th century. They were sophisticated analog computers whose development reached its zenith following World War II, specifically the Computer… …
82Micrometer — This article is about the measuring device. For the unit of length, see Micrometre. Outside, inside, and depth micrometers A micrometer (   …
83Liu Hui — (zh tsp|t=劉徽|s=刘徽|p=Liú Huī, fl. 3rd century) was a Chinese mathematician who lived in the Wei Kingdom. In 263 he edited and published a book with solutions to mathematical problems presented in the famous Chinese book of mathematics known as The …
84Dual energy X-ray absorptiometry — (DXA, previously DEXA) is a means of measuring bone mineral density (BMD). Two X ray beams with differing energy levels are aimed at the patient s bones. When soft tissue absorption is subtracted out, the BMD can be determined from the absorption …
85Prothrombin time — The prothrombin time (PT) and its derived measures of prothrombin ratio (PR) and international normalized ratio (INR) are measures of the extrinsic pathway of coagulation. They are used to determine the clotting tendency of blood, in the measure… …
86Argon–argon dating — Argon argon (or 40Ar/39Ar) dating is a radiometric dating method invented to supersede potassium argon (K Ar) dating in accuracy. In this technique, the decay of 40K to 40Ar* (* indicates radiogenic) is used to date geological events,… …
87Arc length — Determining the length of an irregular arc segment is also called rectification of a curve. Historically, many methods were used for specific curves. The advent of infinitesimal calculus led to a general formula that provides closed form… …
88The Open Source Security Testing Methodology Manual — This Open Source Security Testing Methodology Manual ( [http://www.osstmm.org/ OSSTMM] ) provides a methodology for a thorough security test, now referred to as an OSSTMM audit. An OSSTMM audit is an accurate measurement of security at an… …
89Hurricane Katrina — Infobox Hurricane Name=Hurricane Katrina Type=hurricane Year=2005 Basin=Atl Image location=Hurricane Katrina August 28 2005 NASA.jpg Formed=August 23, 2005 Dissipated=August 30, 2005 1 min winds=150 Pressure=902 Da Inflated=1 Damagespost=… …
90Acoustic thermometry — of Ocean Climate (ATOC) is an idea to observe the state of the world s oceans, and the ocean climate in particular, using long range acoustic transmissions. Prototype measurements of temperature have been made in the North Pacific Basin and… …
