When and why was GPS technology made available for civilian use?
What will be an ideal response?
Until 1983, GPS technology was only available for military use. In 1983, after Korean Air Lines (KAL) Flight 007 strayed into the USSR’s prohibited airspace and was shot down, President Ronald Reagan issued a directive making GPS freely available for civilian use as a common good. Initially the highest quality signal was reserved for military use. The signal available for civilian use was intentionally degraded until 2000, and the precision of civilian GPS was improved from about 100 meters to about 20 meters.
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One method for sketching a(n) ____________________ is to first construct a right angle (square corner).
Fill in the blank(s) with the appropriate word(s).
A 10-pound female catfish may deposit as many as _____ eggs
a. 500 c. 40,000 b. 10,000 d. 1,000,000
Technician A says any kind of refrigerant can be added to the system for leak testing. Technician B says it is not necessary to purge the hose between the refrigerant container and gauge manifold when adding refrigerant for leak testing. Who is correct?
A. Technician A only B. Technician B only C. Both A and B D. Neither A nor B
One method of ensuring reliability in data transmission systems is to transmit a parity bit along with every nibble, byte, or word of binary data transmitted. The parity bit confirms whether an even or odd number of 1s were transmitted in the data. In even-parity systems, the parity bit is set to 1 when the number of 1s in the transmitted data is odd. Odd-parity systems set the parity bit to 1 when the number of 1s in the transmitted data is even. Assume that a parity bit is transmitted for every nibble of data. Design a logic circuit that checks the nibble of data and transmits the proper parity bit for both even- and odd-parity systems.
Find: The logic circuit that checks the nibble of data and transmits the proper parity bit for even-parity systems.