The paper deals with the problems of safety communication in industrial networks for purpose of assurance of functional safety. It is intents on analysis of treats on industry networks and there is described recommended safety protections and their location into…

In 2005, all civilised worl will remind the 100 years anniversary of Publishing the original work on special theory of relativity by Albert Einstein. This contribution is a brief review of its principial ideas in the field of electrodynamics., In…

In present article a dynamic model of universal motors, based on the measured data is developed. Suppose that the supply voltage is harmonic and motor operate in open circuit loop. After representing of the mathematical model a simulation model based…