The sine wave or sinusoid is a mathematical curve that describes a smooth repetitive oscillation. Named after the mathematical sine function, of which it is the graph, it describes the way a generator develops alternating current (AC), and is the pattern of the simplest AC welding current.
The economics of worker retention - by Dan Davis It's not unusual for a metal fabricating worker to leave one company and go to work for another for a small increase in pay. This, however, may not be in the best interest of the worker, and it sure hurts the company that loses quality talent.
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