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Inside the cell nucleus, genes must be turned on and off with precision to regulate biological processes. The first models of ...

Abstract: In the specialized literature there are numerous references to the static and dynamic characteristics of digital pneumatic on / off distributors controlled in pulse width modulation (PWM).

A short description of the lock-in technique gives an idea of the working principle of these useful devices, that are spreadly used in weak signals detection, but rarely treated in introductory ...