Background Cardiac implantable electric devices are commonly used to treat heart failure. Little is known about temporal and geographic variation in use of cardiac resynchronization therapy (CRT) devices in usual care settings.
A hammer drill, also known as a rotary hammer, roto-drill or hammering drill, (see also rotary drill) is a rotary drill with a hammering action. The hammering action provides a short, rapid hammer thrust to pulverize relatively brittle material and provide quicker drilling with less effort.
Rotoscoping is a method of traditional animation invented by Max Fleischer in 1915, in which animation is traced over actual film footage of actors and scenery. Traditionally, the live action will be printed out frame by frame and registered.