March on Washington 50 th Anniversary Stamp. Fifty years after the March on Washington for Jobs and Freedom, the U.S. Postal Service is commemorating the August 28, 1963, event with a limited-edition Forever Â® stamp.irst day of issue: August 23, 2013 Washington, DC. 1963 March on Washington is being issued as a Forever Â® stamp. Forever stamps are always equal in value to the current First-Class Mail &reg one-ounce rate, which is $0.49.
lucency. Definitions: 1. In radiology, a region in an image caused by an absorber of lower x-ray attenuation than its surrounding tissues; in general, the opposite of opacity. The definition information for lucency is provided by Stedman's. You can search our medical dictionary here.. In radiology, a region in an image caused by an absorber of lower x-ray attenuation than its surrounding tissues; in general, the opposite of opacity. The definition information for lucency is provided by Stedman's.
(1) In general, the period of time that one component in a system is spinning its wheels waiting for another component. Latency, therefore, is wasted time. For example, in accessing data on a disk, latency is defined as the time it takes to position the proper sector under the read/write head. (2) In networking, the amount of time it takes a packet to travel from source to destination. Together, latency and bandwidth define the speed and capacity of a network. (3) In VoIP terminology, latency refers to a delay in packet delivery. VoIP latency is a service issue that is usually based on physical distance, hops, or voice to data conversion.