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  2. Defense Enrollment Eligibility Reporting System - Wikipedia

    en.wikipedia.org/wiki/Defense_Enrollment...

    Defense Enrollment Eligibility Reporting System (DEERS) is a computerized database for United States Service members, military retirees, 100% VA Disabled Veterans, dependents, DoD active Contractors, and others worldwide who are entitled to Public Key Infrastructure and TRICARE eligibility.

  3. APEX system - Wikipedia

    en.wikipedia.org/wiki/APEX_system

    In many instances, this was done: the 1973 and 1986 ANSI exposure guides, ANSI PH2.7-1973 and ANSI PH2.7-1986, eliminated exposure calculator dials in favor of tabulated APEX values. However, the logarithmic markings for aperture and shutter speed required to set the computed exposure were never incorporated in consumer cameras.

  4. Solid angle - Wikipedia

    en.wikipedia.org/wiki/Solid_angle

    The point from which the object is viewed is called the apex of the solid angle, and the object is said to subtend its solid angle at that point. In the International System of Units (SI), a solid angle is expressed in a dimensionless unit called a steradian (symbol: sr), which is equal to one square radian, sr = rad 2 .

  5. Minimum deviation - Wikipedia

    en.wikipedia.org/wiki/Minimum_deviation

    In a prism, the angle of deviation (δ) decreases with increase in the angle of incidence (i) up to a particular angle.This angle of incidence where the angle of deviation in a prism is minimum is called the minimum deviation position of the prism and that very deviation angle is known as the minimum angle of deviation (denoted by δ min, D λ, or D m).

  6. Antoine equation - Wikipedia

    en.wikipedia.org/wiki/Antoine_equation

    The Antoine equation is ⁡ = +. where p is the vapor pressure, T is temperature (in °C or in K according to the value of C) and A, B and C are component-specific constants.. The simplified form with C set to zero:

  7. Geomagnetic latitude - Wikipedia

    en.wikipedia.org/wiki/Geomagnetic_latitude

    Geomagnetic latitude, or magnetic latitude (MLAT), is a parameter analogous to geographic latitude, except that, instead of being defined relative to the geographic poles, it is defined by the axis of the geomagnetic dipole, which can be accurately extracted from the International Geomagnetic Reference Field (IGRF). [1]

  8. Electronic apex locator - Wikipedia

    en.wikipedia.org/wiki/Electronic_apex_locator

    An electronic apex locator is an electronic device used in endodontics to determine the position of the apical constriction and thus determine the length of the root canal space. The apex of the root has a specific resistance to electrical current, and this is measured using a pair of electrodes typically hooked into the lip and attached to an ...

  9. Alveolar–arterial gradient - Wikipedia

    en.wikipedia.org/wiki/Alveolar–arterial_gradient

    Further, the effects of gravity alter the flow of both blood and air through various heights of the lung. In the upright lung, both perfusion and ventilation are greatest at the base, but the gradient of perfusion is steeper than that of ventilation so V/Q ratio is higher at the apex than at the base. This means that blood flowing through ...