provided in a control system is to allow manual override of remote installations, either by a serial communication. link, modem, radio or other type of interface. In these installation the field device may be manually controlled until a. problem is corrected or until maintenance personnel can visit the site.
â¢ Doctors want to know how much hearing damage results from loud music. â¢ Teachers want to know whether or not listening to classical music helps students perform better on tests. Statistical investigations are used every day for a variety of reasons.
What Is the Purpose of Sleep Testing? Sleep studies, or polysomnograms, are tests to diagnose sleep disorders like sleep apnea, periodic limb movements of sleep, parasomnias (sleep behaviors), and narcolepsy. They generally involve spending the night sleeping at a sleep laboratory or sleep center.