TABLE OF CONTENTS Level: 1
Definition: The default web browser installed with the Macintosh OS X operating system, Safari includes most of the features of other full-function web browsers such as Internet Explorer and Firefox. Safari also includes a Google search box and a tabbed interface to help organize the viewing of multiple pages.
Level: 2
Definition: In digital communications fields, sampling is a critical part of the process for converting analog signals to digital. Sampling refers to the process of obtaining or taking small discrete samples of an analog signal, such as an audio recording, at a mathematically determined rate. This allows the digital signal to be faithfully reproduced when it is converted back to analog for listening. CDs are digital recordings that have been sampled at a relatively high rate to ensure faithful reproduction for listeners. There has to be some finite number of samples taken of the analog signal because representing every instant of sound is not feasible. However, if an analog signal at the end of the conversion process is to represent the original at all, a mathematical law comes into play. The amount of times a signal needs to be sampled (i.e., the sampling frequency) must be at least twice the highest sound frequency in the original signal. Another part of the sampling process is to compare the samples to an established numerical scale representing the range of sound frequencies. Again, not every instant of sound can be represented, so the...
