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  2. Health effects of sunlight exposure - Wikipedia

    en.wikipedia.org/wiki/Health_effects_of_sunlight...

    Exposing skin to the ultraviolet radiation in sunlight has both positive and negative health effects. On the positive side, exposure allows for the synthesis of vitamin D 3. Vitamin D has been suggested as having a wide range of positive health effects, which include strengthening bones [1] and possibly inhibiting the growth of some cancers.

  3. List of people with locked-in syndrome - Wikipedia

    en.wikipedia.org/wiki/List_of_people_with_locked...

    Gary Parkinson. In 2010, former Premiership footballer Gary Parkinson had a massive stroke and was later diagnosed with locked-in syndrome. This, however, has not ended his career in football, as he is now part of Middlesbrough F.C.'s scouting analysis team, watching potential players on DVD and relaying the verdict to the Middlesbrough manager Tony Mowbray solely through blinking.

  4. Atlantic Coast Line class R-1 - Wikipedia

    en.wikipedia.org/wiki/Atlantic_Coast_Line_class_R-1

    Despite their flaws, they were capable pullers. No. 1800 accelerated a 20-car, 1500-ton passenger train from a dead stop to 70 miles per hour in 11 + 1 ⁄ 2 minutes and 11 miles in a test. The class also ran as many as 18,000 miles a month in passenger service.

  5. List of optometric abbreviations - Wikipedia

    en.wikipedia.org/wiki/List_of_optometric...

    Description ( notes ) AC. Anterior chamber. fluid-filled space between the iris and the endothelium. AC 4/4. Grade 4 anterior chamber angle. open angle between cornea and iris. AC 3/4. Grade 3 anterior chamber angle.

  6. Convergence tests - Wikipedia

    en.wikipedia.org/wiki/Convergence_tests

    exists there are three possibilities: if L > 1 the series converges (this includes the case L = ∞) if L < 1 the series diverges. and if L = 1 the test is inconclusive. An alternative formulation of this test is as follows. Let { an } be a series of real numbers. Then if b > 1 and K (a natural number) exist such that.

  7. Experimental testing of time dilation - Wikipedia

    en.wikipedia.org/wiki/Experimental_testing_of...

    Decay time of muons: The time dilation formula is , where T0 is the proper time of a clock comoving with the muon, corresponding with the mean decay time of the muon in its proper frame. As the muon is at rest in S′, we have γ=1 and its proper time T′0 is measured. As it is moving in S, we have γ>1, therefore its proper time is shorter ...

  8. Houston, we don't have a problem: NASA fuels alarm after ...

    www.aol.com/news/nasa-accidentally-airs-space...

    NASA has been forced to reassure the public that there is no emergency aboard the International Space Station, after audio of a medical drill was accidentally played on a livestream Wednesday night.

  9. Ratio test - Wikipedia

    en.wikipedia.org/wiki/Ratio_test

    In mathematics, the ratio test is a test (or "criterion") for the convergence of a series. where each term is a real or complex number and an is nonzero when n is large. The test was first published by Jean le Rond d'Alembert and is sometimes known as d'Alembert's ratio test or as the Cauchy ratio test.