منابع مشابه
Measurement of pollution history.
We have developed a technique to measure the history of pollution exposure levels in the environment based upon the introduction of a time-clock to glacial, lacustrine, and marine sediments. The technique involves the use of 210 Pb, a radioactive member of the 238 U series, which decays with a half-life of 22 yr. This lead isotope enters surface waters unsupported by its parents in the U-238 se...
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Measurement in science has a long tradition as described by Lemmerich /LEMM88/. While the measurement of length the meter was defined in 1889 /LEMM88/, p.87, the measurement of temperature was more complicated. The graduation of the distance of the fixpoints was introduced by Fahrenheit in 1714 and by Celsius in 1742. Celsius devided the scale of 100 degrees and 0 degrees in hundred equal secto...
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The history of Measurement Theory (MT) can be divided into two periods, the Formation Period and the Mature Theory, where Suppes’ foundational work marks the transition from one to the other. The first period consists of two different yet complementary research traditions: the work of Helmholtz, Hölder and Campbell on axiomatics and morphisms on one side, and the studies by Stevens and his scho...
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A flare is a combustion device that uses air or steam to burn associated, unwanted or excess gases and liquids released during production or by pressure relief valves during unplanned over-pressuring of plant equipment in many industrial operations, such as oil-gas extraction, refineries, chemical plants, coal industry and landfills. Several environmental problems caused by gas flaring such as ...
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ترجمه با گسترش زبان آغاز شده و اهمیت آن روز به روز افزایش می یابد، و برای اولین بار به عنوان شاخه ای از دانش و روشی برای انتقال علوم، فرهنگ و تجربه در در دوره قاجار در ایران آغاز شد. در حقیقت متون تاریخی از اولین متونی هستند که در ایران ترجمه شدند چرا که به سیاستمداران آن دوره کمک می کردند تا به علل موفقیت جهان غرب و پیشرفت هایشان در طول تاریخ پی ببرند، بنابراین به تدریج ترجمه این گونه متون رون...
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ژورنال
عنوان ژورنال: Environmental Health Perspectives
سال: 1974
ISSN: 0091-6765,1552-9924
DOI: 10.1289/ehp.749179