The first magnetic compasses indicating directions to the Earth's magnetic poles appeared in the third century BC in China....

When we describe the laws of electricity in terms of vector fields, we are faced with two mathematically important features of...

Modern communication lines intended for transmitting information over long distances are often only optical lines, due to the rather high efficiency...

Automata theory is a branch of cybernetics that arose under the influence of the demands of digital computer technology and machines for...