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  2. Resettlement Administration - Wikipedia

    en.wikipedia.org/wiki/Resettlement_Administration

    The Resettlement Administration (RA) was a New Deal U.S. federal agency created May 1, 1935. [1] It relocated struggling urban and rural families to communities planned by the federal government. On September 1, 1937, it was succeeded by the Farm Security Administration .

  3. Regular Army (United States) - Wikipedia

    en.wikipedia.org/wiki/Regular_Army_(United_States)

    In modern times, the professional core of the United States Army continues to be called the Regular Army (often abbreviated as "RA"). From the time of the American Revolution until after the Spanish–American War , state militias and volunteer regiments organized by the states (but thereafter controlled by federal authorities and federal ...

  4. Resident assistant - Wikipedia

    en.wikipedia.org/wiki/Resident_assistant

    A resident assistant (RA), also known by a variety of other names, [note 1] is a trained peer leader who coordinates activities in residence halls in colleges and universities, mental health and substance abuse residential facilities, [1] or similar establishments.

  5. Return merchandise authorization - Wikipedia

    en.wikipedia.org/wiki/Return_merchandise...

    A return merchandise authorization (RMA), return authorization (RA) or return goods authorization (RGA) is a part of the process of returning a product to receive a refund, replacement, or repair to which buyer and seller agree during the product's warranty period.

  6. Rayleigh number - Wikipedia

    en.wikipedia.org/wiki/Rayleigh_number

    In fluid mechanics, the Rayleigh number (Ra, after Lord Rayleigh [1]) for a fluid is a dimensionless number associated with buoyancy-driven flow, also known as free (or natural) convection. [ 2 ] [ 3 ] [ 4 ] It characterises the fluid's flow regime: [ 5 ] a value in a certain lower range denotes laminar flow ; a value in a higher range ...

  7. Occam's razor - Wikipedia

    en.wikipedia.org/wiki/Occam's_razor

    In philosophy, Occam's razor (also spelled Ockham's razor or Ocham's razor; Latin: novacula Occami) is the problem-solving principle that recommends searching for explanations constructed with the smallest possible set of elements.

  8. Spherical coordinate system - Wikipedia

    en.wikipedia.org/wiki/Spherical_coordinate_system

    To plot any dot from its spherical coordinates (r, θ, φ), where θ is inclination, the user would: move r units from the origin in the zenith reference direction (z-axis); then rotate by the amount of the azimuth angle (φ) about the origin from the designated azimuth reference direction, (i.e., either the x– or y–axis, see Definition ...

  9. Registration authority - Wikipedia

    en.wikipedia.org/wiki/Registration_authority

    Frequently, facilitating the implementation of an ISO standard's requirements is best suited, by its nature, to one entity, an RA. This, de facto, creates a monopoly situation and this is why care needs to be taken with respect to the functions carried out and the fees charged to avoid an abuse of such a situation. [ 1 ]