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  2. Dual-energy X-ray absorptiometry - Wikipedia

    en.wikipedia.org/wiki/Dual-energy_X-ray...

    Dual-energy X-ray absorptiometry (DXA, or DEXA [1]) is a means of measuring bone mineral density (BMD) using spectral imaging. Two X-ray beams, with different energy levels, are aimed at the patient's bones. When soft tissue absorption is subtracted out, the bone mineral density (BMD) can be determined from the absorption of each beam by bone ...

  3. Bridgewater Associates - Wikipedia

    en.wikipedia.org/wiki/Bridgewater_Associates

    Bridgewater Associates was founded by Ray Dalio in 1975 from an office in his Manhattan apartment. At that time, the business consisted exclusively of advising corporate clients and the management of domestic and international currency and interest rate risks.

  4. 1973 oil crisis - Wikipedia

    en.wikipedia.org/wiki/1973_oil_crisis

    In October 1973, the Organization of Arab Petroleum Exporting Countries (OAPEC) announced that it was implementing a total oil embargo against the countries who had supported Israel at any point during the 1973 Yom Kippur War, which began after Egypt and Syria launched a large-scale surprise attack in an ultimately unsuccessful attempt to recover the territories that they had lost to Israel ...

  5. Cathode-ray tube - Wikipedia

    en.wikipedia.org/wiki/Cathode-ray_tube

    A cathode-ray tube (CRT) is a vacuum tube containing one or more electron guns, which emit electron beams that are manipulated to display images on a phosphorescent screen. [2] The images may represent electrical waveforms on an oscilloscope , a frame of video on an analog television set (TV), digital raster graphics on a computer monitor , or ...

  6. One-drop rule - Wikipedia

    en.wikipedia.org/wiki/One-drop_rule

    The one-drop rule was a legal principle of racial classification that was prominent in the 20th-century United States. It asserted that any person with even one ancestor of black ancestry ("one drop" of "black blood") [1] [2] is considered black (Negro or colored in historical terms).

  7. Dollar General - Wikipedia

    en.wikipedia.org/wiki/Dollar_General

    Dollar General expanded to 46 states in 2020 with the addition of new stores in Wyoming [50] in March and Washington in April. [51] Dollar General store in Minneapolis destroyed by arson, 2020. In late May 2020, two Dollar General stores were destroyed by arson during the George Floyd riots in Minneapolis–Saint Paul, and three others had ...

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