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  2. Substantial Presence Test - Wikipedia

    en.wikipedia.org/wiki/Substantial_Presence_Test

    Temporary presence in the United States as a student on a F visa, J visa, M visa, or Q visa. It is possible to exclude only the first five calendar years of presence from the Substantial Presence Test. Also, it is possible to use the exemption at most 5 times. Temporary presence in the United States as a teacher or trainee under a J visa or Q visa.

  3. Physical presence test - Wikipedia

    en.wikipedia.org/wiki/Physical_presence_test

    The "physical presence in Australia test" is one of the three tests under Australian law through which a charitable institution may be entitled to the income tax-exempt charity endorsement; the others are the "deductible gift recipient test" and the "prescribed by law" test. The two elements of the test are whether the institution has a ...

  4. Educational technology - Wikipedia

    en.wikipedia.org/wiki/Educational_technology

    Mobile learning can provide performance support for checking the time, setting reminders, retrieving worksheets, and instruction manuals. [ 118 ] [ 119 ] Such devices as iPads are used for helping disabled (visually impaired or with multiple disabilities) children in communication development as well as in improving physiological activity ...

  5. Empirical evidence for the spherical shape of Earth - Wikipedia

    en.wikipedia.org/wiki/Empirical_evidence_for_the...

    The first circumnavigation of the Earth by the Magellan expedition lost a day, [20] confirmed by subsequent circumnavigations, which eventually led to the creation of the International Date Line. The shortest way to travel between two distant points is by great circle navigation , as known by ocean navigators for some time.

  6. Titer - Wikipedia

    en.wikipedia.org/wiki/Titer

    Titer (American English) or titre (British English) is a way of expressing concentration. [1] Titer testing employs serial dilution to obtain approximate quantitative information from an analytical procedure that inherently only evaluates as positive or negative.

  7. Pre- and post-test probability - Wikipedia

    en.wikipedia.org/wiki/Pre-_and_post-test_probability

    In clinical practice, post-test probabilities are often just estimated or even guessed. This is usually acceptable in the finding of a pathognomonic sign or symptom, in which case it is almost certain that the target condition is present; or in the absence of finding a sine qua non sign or symptom, in which case it is almost certain that the target condition is absent.

  8. Scientific calculator - Wikipedia

    en.wikipedia.org/wiki/Scientific_calculator

    The first scientific calculator that included all of the basic ideas above was the programmable Hewlett-Packard HP-9100A, [5] released in 1968, though the Wang LOCI-2 and the Mathatronics Mathatron [6] had some features later identified with scientific calculator designs.

  9. Free body diagram - Wikipedia

    en.wikipedia.org/wiki/Free_body_diagram

    In physics and engineering, a free body diagram (FBD; also called a force diagram) [1] is a graphical illustration used to visualize the applied forces, moments, and resulting reactions on a free body in a given condition. It depicts a body or connected bodies with all the applied forces and moments, and reactions, which act on the body(ies).

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