A pân junction is a boundary or interface between two types of semiconductor materials, p-type and n-type, inside a single crystal of semiconductor. The p side contains an excess of holes, while the n side contains an excess of electrons in the outer shells of the electrically neutral atoms there. This allows electrical current to pass through the junction only in one direction. The p-n junction is created by doping, for example by ion implantation, diffusion of dopants, or by epitaxy ...
ITER is an international collaboration to build the first fusion science experiment capable of producing a self-sustaining fusion reaction, as a way of generating a clean, safe, and sustainable power.
what is an itab? The Spartan Race iTaB is an engraved piece which personalizes your fantastic Spartan Race finisher medal. It is available in a self-adhesive style which fits neatly in to the recess on the reverse side of the round Spartan Race finisher medals up to 2015; or in a dog-tag style which complements all Spartan Race finisher medals and attaches with the enclosed ball-chain.