1 When out of the current, swim at an angle--away from the current--towards shore. 2  If you are unable to swim out of the rip current, float or calmly tread water. 3  When out of the current, swim towards shore.
The typical Disklavier is a real acoustic piano outfitted with electronic sensors for recording and electromechanical solenoids for playback. Sensors record the movements of the keys, hammers, and pedals during a performance, and the system saves the performance data as a Standard MIDI File (SMF).
A silicon-controlled rectifier is a semiconductor device that is used as a switch in an electrical circuit. It's a solid state direct current (DC) electronic switch. There is a ton of information including a detailed description of the SCR and a list of applications at the Wikipedia article.