Sleep (system call)

About: Sleep (system call) is a research topic. Over the lifetime, 2633 publications have been published within this topic receiving 27806 citations. The topic is also known as: Sleep() & sleep().

Nightcap: a home-based sleep monitoring system

Abstract: In an attempt to offer a home-based adjunct to traditional sleep laboratory methods, we developed a system to monitor sleep, and to predict algorithmically non-rapid-eye-movement (NREM) and rapid-eye-movement (REM) sleep states, using eye and body motility as the only parameters. Eye movement was measured using a strain gauge transducer applied to the eyelid of subjects, while body movement was measured using a piezo-ceramic phono cartridge. Both transducers were mounted on a tennis headband, along with electronics that amplified, filtered, and digitized the signals. Digital pulse signals were input to a portable computer in minute-long epochs, and state-predicting algorithms were run based on this motility data. Four subjects were monitored in the sleep lab with both our headgear and standard polysomnography. Hand-scored sleep records were compared with those predicted by computer algorithms. Algorithm-predicted states agreed with hand-scored ones an average of 85.57% (SEM +/- 1.7%). Mean values for sleep onset and REM latency were within 1.6 and 10.8 min of polysomnographic records, respectively. These results are encouraging, and suggest that this system could provide a comfortable, subject operable, and inexpensive method for the evaluation of sleep at home.

ACPI complaint computer system and overtemperature protection method therefor

Abstract: A computer system having an operating system which complies with the advanced configuration and power interface (ACPI) specification comprises a temperature sensor for sensing an inner temperature of the computer system and for generating an alarm signal when the sensed temperature exceeds a predetermined value, a bridge controller for generating a system management interrupt (SMI) in response to the alarm signal, a basic input-output system (BIOS) read-only memory (ROM) for storing a power management routine, and a power management processor for receiving a power control command signal generated by the power management routine in response to the SMI, and for generating a system command interrupt (SCI). The operating system causes the computer system to enter a “sleep” state in response to the SCI. The computer system enters the “sleep” state when the inner temperature exceeds the predetermined value, and restores data normally when the computer system resumes operation.

Apparatus and method for controlling slotted mode of several systems using one sleep controller in a hybrid terminal of a mobile communication system

Abstract: A method for controlling a slotted mode of several systems using one sleep controller enhanced a hybrid sleep controller that performs sleep/wake-up interface of system protocol stacks (PSs) in a hybrid terminal including at least two system PSs used for different communication networks of a mobile communication system. The method includes determining whether there is a shared hardware-waiting system according to a sleep request from a system PS; if there is no shared hardware-waiting system, turning off a clock of the sleep controller and power of shared hardware to enable operation in a real sleep mode; and if there is a shared hardware-waiting system, sending an active command to a corresponding system and simultaneously driving a sleep timer until a time that other systems wake up, to enable operation in a virtual sleep mode.

Sleep Parameter Assessment Accuracy of a Consumer Home Sleep Monitoring Ballistocardiograph Beddit Sleep Tracker: A Validation Study.

Abstract: Study Objectives:Growing interest in monitoring sleep and well-being has created a market for consumer home sleep monitoring devices. Additionally, sleep disorder diagnostics, and sleep and dream r...