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  2. Veterans benefits for post-traumatic stress disorder in the ...

    en.wikipedia.org/wiki/Veterans_benefits_for_post...

    The United States has compensated military veterans for service-related injuries since the Revolutionary War, with the current indemnity model established near the end of World War I. The Department of Veterans Affairs (VA) began to provide disability benefits for post-traumatic stress disorder (PTSD) in the 1980s after the diagnosis became ...

  3. Combined statistical area - Wikipedia

    en.wikipedia.org/wiki/Combined_statistical_area

    An enlargeable map of the 175 combined statistical areas (CSAs) of the United States (172) and Puerto Rico (3) as defined in 2020. The following table lists the 181 combined statistical areas (CSAs) of the United States with the following information: The CSA rank by population as of July 1, 2023, as estimated by the U.S. Census Bureau [4]

  4. Precision and recall - Wikipedia

    en.wikipedia.org/wiki/Precision_and_recall

    In pattern recognition, information retrieval, object detection and classification (machine learning), precision and recall are performance metrics that apply to data retrieved from a collection, corpus or sample space. Precision (also called positive predictive value) is the fraction of relevant instances among the retrieved instances.

  5. Usage share of operating systems - Wikipedia

    en.wikipedia.org/wiki/Usage_share_of_operating...

    StatCounter web usage data of desktop or laptop operating systems varies significantly by country. For example, in 2017, macOS usage in North America was at 16.82% [94] (17.52% in the US [95]) whereas in Asia it was only 4.4%. [96] As of July 2023, macOS usage has increased to 30.81% in North America [97] (31.77% in the US) [98] and to 9.64% in ...

  6. List of core-based statistical areas - Wikipedia

    en.wikipedia.org/wiki/List_of_core-based...

    The United States Office of Management and Budget (OMB) has defined 925 core-based statistical areas (CBSAs) for the United States and 10 for Puerto Rico. [1] The OMB defines a core-based statistical area as one or more adjacent counties or county equivalents that have at least one urban core area of at least 10,000 population, plus adjacent territory that has a high degree of social and ...

  7. Virginia statistical areas - Wikipedia

    en.wikipedia.org/wiki/Virginia_statistical_areas

    Virginia statistical areas. Coordinates: 37.5375°N 78.615°W. The U.S. State of Virginia currently has 19 statistical areas that have been delineated by the Office of Management and Budget (OMB). On July 21, 2023, the OMB delineated four combined statistical areas, 11 metropolitan statistical areas, and four micropolitan statistical areas in ...

  8. List of U.S. states and territories by population - Wikipedia

    en.wikipedia.org/wiki/List_of_U.S._states_and...

    The states and territories included in the United States Census Bureau 's statistics for the United States population, ethnicity, and most other categories include the 50 states and Washington, D.C. Separate statistics are maintained for the five permanently inhabited territories of the United States: Puerto Rico, Guam, the U.S. Virgin Islands ...

  9. History of the periodic table - Wikipedia

    en.wikipedia.org/wiki/History_of_the_periodic_table

    This is an accepted version of this page This is the latest accepted revision, reviewed on 29 September 2024. Development of the table of chemical elements The American chemist Glenn T. Seaborg —after whom the element seaborgium is named—standing in front of a periodic table, May 19, 1950 Part of a series on the Periodic table Periodic table forms 18-column 32-column Alternative and ...