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.
What is an STC Rating? STC stands for Sound Transmission Class. Basically, STC ratings are an established way to average how much sound is stopped by something. STC ratings are used for windows, doors, walls and most building materials. For windows, STC ratings range from 18 to 38. STC ratings are the ONLY way to accurately compare various noise reduction products. An STC rating is an instrument measurement of how much noise is stopped. The STC ratings allow accurate âapple to appleâ comparisons. The STC rating is the average amount of noise stopped at 18 different frequencies, measured in decibels.