No ULs have been set for potassium from dietary sources. For infants 0-12 months, the source of intake should be breast milk, formula and food only. For children, adolescents and adults, including pregnant and lactating women, supplements should be taken only under medical supervision.
Autofocus is a mechanism in an optical system which automatic ally changes the optics to focus an image. In a camera, this is used to focus the subject image, through the lens, onto the focal plane-the film or digital sensor. Autofocus MethodsEdit ... Autofocus Evolution.
Alternatively referred to as the counting frame, an abacus is a mechanical device used to assist a person in performing mathematical calculations and counting. Before computers, calculators, or even arithmetic using paper and pencil, the abacus was the most advanced device for crunching numbers. Yes, even today in certain parts of the world the abacus is still used as a primary counting device or as a backup to more modern counting devices.