Black has represented hardships as well as strength for overcoming those hardships, and gold is for the sun shining on Jamaica. History of the Jamaican Flag. After gaining independence from the British West Indies in 1962, Jamaica launched a national competition to find the design for their new national flag. Of many designs submitted, the gold saltire, or X, beat out various striped flags in the same color scheme.
Detective quantum efficiency. The detective quantum efficiency (often abbreviated as DQE) is a measure of the combined effects of the signal (related to image contrast) and noise performance of an imaging system, generally expressed as a function of spatial frequency.
If you were allowed only one roll of film to photograph an eclipse, it is hard to go wrong with the latest ISO 400 film from Agfa, Fuji, Kodak, and Konica. The ISO rating is a measure of the film's sensitivity: how fast it responds to light. Films with an ISO of 100 or less are slow and work best in bright light.