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Showing papers on "Sleep (system call) published in 1970"


Patent
15 Apr 1970
TL;DR: In this paper, the authors propose a sleep switch mechanism for a clock timer where a UNIQUE FRICTION CLUTCH MECHANISM is positioned between a CONTINUOUSLY ROTATED GEAR of the clock and a MANUALLY MOVable SECTOR GEAR of a clock.
Abstract: A "SLEEP SWITCH" MECHGANISM FOR A CLOCK TIMER WHEREIN A UNIQUE FRICTION CLUTCH MECHANISM IS POSITIONED BETWEEN A CONTINUOUSLY ROTATED GEAR OF THE CLOCK TIMER AND A MANUALLY MOVABLE SECTOR GEAR OF THE CLOCK TIMER. THE SLEEP FRICTION CLUTCH MECHANISM COMPRISES TWO PARTS, A HOLLOW PINION HAVING INTERNALLY MOLDED FLEXIBLE TEETH, AND A CONTINUOUSLY ROTATED HEXAGONAL SHAFT UPON WHICH THE HOLLOW PINION RIDES SO THAT A SLIDING FRICTION CLUTCH RESULTS FROM THE INTERACTION BETWEEN THE INTERNAL TEETH OF THE PINION AND THE HEXAGONAL SHAFT WHEN THE SECTOR GEAR IS MANUALLY MOVED INTO ENGAGEMENT WITH THE PINION GEAR.

10 citations


10 Jul 1970
TL;DR: Several features of heart rate which contain sleep information are computed and analysis of variance is used to indicate the suitability of these measures in the pattern recognition of sleep stages from heart rate data.
Abstract: : Many important space and military missions require maximal alertness which is dependent on adequate amounts of rest and sleep. In order to study sleep-wakefulness patterns in realistic space and military situations, it is necessary to monitor the level of arousal with simplified reliable band-limited devices. The limited time bandwidth available for the transmission of sleep information necessitates the development of a technique for data compression. This report describes the possibility of extracting sleep information from heart rate data. Several features of heart rate which contain sleep information are computed and analysis of variance is used to indicate the suitability of these measures in the pattern recognition of sleep stages from heart rate data. (Author)

2 citations