John Watkins ponders Control Theory. One of the fundamentals of control theory is that when negative feedback is applied, the improvement in performance takes place at the point where the parameter being controlled is measured. For example, if a loudspeaker is equipped with motional feedback that uses an accelerometer on the diaphragm, the accelerometer will…

Read More

John Watkinson considers epidemiology. We are now far enough through the viral outbreak to be able to look back at some of what took place. Given that my advanced years put me at risk, for my own safety I now know more about epidemiology than I ever wanted to know, but even the little I…

Read More