Showing papers on "Sleep (system call) published in 2011"

Use of mobile phones as intelligent sensors for sound input analysis and sleep state detection.

Abstract: Sleep is not just a passive process, but rather a highly dynamic process that is terminated by waking up. Throughout the night a specific number of sleep stages that are repeatedly changing in various periods of time take place. These specific time intervals and specific sleep stages are very important for the wake up event. It is far more difficult to wake up during the deep NREM (2–4) stage of sleep because the rest of the body is still sleeping. On the other hand if we wake up during the mild (REM, NREM1) sleep stage it is a much more pleasant experience for us and for our bodies. This problem led the authors to undertake this study and develop a Windows Mobile-based device application called wakeNsmile. The wakeNsmile application records and monitors the sleep stages for specific amounts of time before a desired alarm time set by users. It uses a built-in microphone and determines the optimal time to wake the user up. Hence, if the user sets an alarm in wakeNsmile to 7:00 and wakeNsmile detects that a more appropriate time to wake up (REM stage) is at 6:50, the alarm will start at 6:50. The current availability and low price of mobile devices is yet another reason to use and develop such an application that will hopefully help someone to wakeNsmile in the morning. So far, the wakeNsmile application has been tested on four individuals introduced in the final section.

A Non-invasive Wearable Neck-Cuff System for Real-Time Sleep Monitoring

Abstract: Sleep is an important part of our lives which affects many life factors such as memory, learning, metabolism and the immune system. Researchers have found correlations between sleep and several diseases such as Chronic Obstructive Pulmonary disease, Chronic Heart Failure, Alzheimer's disease, etc. However, sleep data is mainly recorded and diagnosed in sleep labs or in hospitals for some critical cases with high costs. In this work we develop a non-invasive, wearable neck-cuff system capable of real-time monitoring and visualization of physiological signals. These signals are generated from various sensors housed in a soft neck-worn collar and sent via Bluetooth to a cell phone which stores the data. This data is processed and reported to the user or uploaded to the cloud and/or to a local PC. With this system we are able to monitor people's sleep continuously in a non-invasive and low cost method while at the same time collect a large database for sleep data which may benefit future advances in new findings and possibly enable a diagnosis of other diseases. We show as one of the applications of our system the possible detection of obstructive sleep apnea which is a common sleep disorder.

Systems and methods for bedding with sleep diagnostics

Abstract: Systems and methods described herein relate to a sleep diagnostic system including a mattress assembly, a plurality of sensors, data acquisition circuitry, an input device, a sleep processor, and a display device. The mattress assembly may have a sleeping surface, and the plurality of sensors may be disposed within the mattress assembly below the sleeping surface. The sensors are configured to measure at least one sleep condition and output data signals indicative of the sleep condition. The sleep processor receives signals from both the sensors and one or more other input devices, and determines a sleep characteristic based upon these received signals. The display device, which includes circuitry and a graphical user interface, receives the sleep characteristic from the sleep processor and displays it to the user.

Jet lag and shift work sleep disorders: How to help reset the internal clock

Abstract: Jet lag sleep disorder and shift work sleep disorder are the result of dyssynchrony between the internal clock and the external light-dark cycle, brought on by rapid travel across time zones or by working a nonstandard schedule. Symptoms can be minimized by optimizing the sleep environment, by strategic avoidance of and exposure to light, and also with drug and behavioral therapies.

System and method for providing sleep quality feedback

Abstract: A system and method for providing sleep quality feedback that includes receiving alarm input on a base device from a user; the base device communicating an alarm setting based on the alarm input to an individual sleep device; the individual sleep device collecting sleep data based on activity input of a user; the individual sleep device communicating sleep data to the base device; the base device calculating sleep quality feedback from the sleep data; communicating sleep quality feedback to a user; and the individual sleep device activating an alarm, wherein activating the alarm includes generating tactile feedback to the user according to the alarm setting.

Sleep disturbance monitoring apparatus

Abstract: The invention relates to a sleep disturbance monitoring apparatus (1) for monitoring a sleep disturbance of a person. An ambience disturbance profile, which describes which levels and/or changes of an ambient signal, which is, for example, a temperature signal or a noise signal, are related to disturbed sleep, is amended depending on a correlation between the ambience signal and a sleep signal which is indicative of the quality of the sleep of the person. After the ambience disturbance profil has been amended, an environmental disturbance factor, which disturbs the sleep, is determined based on a comparison of an actual ambient signal with the amended ambience disturbance profile, wherein information regarding the determined environmental disturbance factor is output to the person on an output unit. This allows providing personalized information regarding environmental sleep disturbance factors, i.e. the information considers the individual susceptibility of a person for environmental disturbances during sleep.

Wireless portable electrocardiogram and a tri-axis accelerometer implementation and application on sleep activity monitoring.

Abstract: Night-to-night variability of sleep activity requires more home-based portable sleep monitoring instead of clinical polysomnography examination in the laboratory. In this article, a wireless sleep activity monitoring system is described. The system is light and small for the user. Sleep postures, such as supine or left/right side, were observed by a signal from a tri-axis accelerometer. An overnight electrocardiogram was also recorded with a single lead. Using an MSP430 as microcontroller, both physiological signals were transmitted by a Bluetooth chip. A Labview-based interface demonstrated the recorded signal and sleep posture. Three nights of sleep recordings were used to examine night-to-night variability. The proposed system can record overnight heart rate. Results show that sleep posture and posture change can be precisely detected via tri-axis accelerometer information. There is no significant difference within subject data sets, but there are statistically significant differences among subjects, both for heart rate and for sleep posture distribution. The wireless transmission range is also sufficient for home-based users.

To sleep, to strive, or both: how best to optimize memory.

Abstract: While numerous studies have shown that a night of sleep profits memory relative to wake, we still have little understanding about what factors mediate this effect of sleep. A clear understanding of the dynamics of this effect of sleep beyond the initial night of sleep is also lacking. Here, we examined the effect of extrinsic rewards on sleep-dependent declarative memory processing across 12 and 24 hr training-retest intervals. Subjects were either paid based on their performance at retest ($1 for each correct answer), or received a flat fee for participation. After a 12 hr interval we observed pronounced benefits of both sleep and reward on memory. Over an extended 24 hr interval we found 1) that an initial night of sleep partially protects memories from subsequent deterioration during wake, and 2) that sleep blocks further deterioration, and may even have a restorative effect on memory, when it follows a full day of wake. Interestingly, the benefit imparted to rewarded (relative to unrewarded) stimuli was equal for sleep and wake subjects, suggesting that the sleeping brain may not differentially process rewarded information, relative to wake. However, looking at the overall impact of sleep relative to reward in this protocol, it was apparent that sleep both imparted a stronger mnemonic boost than reward, and provided a benefit to memory regardless of whether it occurred in the first or the second 12 hrs following task training.

Enhanced system sleep state support in servers using non-volatile random access memory

Abstract: A non-volatile random access memory (NVRAM) is used in a computer system to enhance support to sleep states. The computer system includes a processor, a non-volatile random access memory (NVRAM) that is byte-rewritable and byte-erasable, and power management (PM) module. A dynamic random access memory (DRAM) provides a portion of system address space. The PM module intercepts a request initiated by an operating system for entry into a sleep state, copies data from the DRAM to the NVRAM, maps the portion of the system address space from the DRAM to the NVRAM, and turns off the DRAM when transitioning into the sleep state. Upon occurrence of a wake event, the PM module returns control to the operating system such that the computer system resumes working state operations without the operating system knowing that the portion of the system address space has been mapped to the NVRAM.

Mobile device sleep monitoring using environmental sound

Abstract: A sleep monitoring application is installed on a mobile device. The mobile device is placed in a location when a user sleeps and records environmental sound. The sleep monitoring application determines indicators of sleep activity such as breathing sounds made by the user, and determines a sleep state of the user based on the indicators of sleep activity. Sleep disorders can be detected from the indicators of sleep activity. The sleep monitoring application may generate a report that summarizes the user's sleep states and alerts the user to any sleep disorders. The sleep monitoring application can use the environmental sound and the determined sleep states to determine ambient sound that is associated with good sleep. Later, if the sleep application determines the user is having problems sleeping, the sleep monitoring application can play the determined ambient sound to help the user sleep.

Method and apparatus for power conservation for a mobile device in idle mode

Abstract: In accordance with an example embodiment of the present invention, a method comprises determining a sleep cycle comprising a number of discontinuous reception (DRX) cycles at a user equipment (UE) based at least on one of a current available power level, a call setup delay interval, and a quality of a received paging indicator channel (PICH) signal; entering a power saving mode during the determined sleep cycle at the user equipment (UE) upon an occurrence of a triggering event; and waking up from the power saving mode and checking for an active call after an occurrence of a second triggering event.

Methods and apparatuses to wake computer systems from sleep states

Abstract: Embodiments of the invention describe apparatuses, systems and methods to detect, during a host platform sleep state, a peripheral device audio jack plug being coupled to (e.g., inserted into) an audio jack connection socket. A specific sleep state of the host platform may be determined, and a system wake event may be generated so that the host platform wakes from the sleep state in response to the peripheral device being coupled to the audio jack connection socket. Thus, embodiments of the invention incorporated in handheld mobile computing devices such as smartphones and tablet computers with limited input/output (I/O) provide a user with alternative means for waking the device from a sleep state.

Sleep-posture sensing and monitoring system

Abstract: In a system (10) for protecting a user from injury sustained during sleep, a sensing device (12) is operated to automatically monitor orientation or posture of a user during sleep of the user A signal is transmitted from the sensing device (12) to a control unit (16), which is operated to activate an appliance (20) so that the appliance (20) generates an alert signal upon detection by the sensing device (12) and control unit (16) of an undesirable orientation or posture of the user

Recognition of sleep patterns using a bed pressure mat

Abstract: The monitoring of sleep patterns is of major importance for various reason such as, the detection and treatment of sleep disorders, the assessment of the effect of different medical conditions or medications on the sleep quality and the assessment of mortality risks associated with sleeping patterns in adults and children. Sleep monitoring by itself is a difficult problem due to both privacy and technical considerations. The proposed system uses a bed pressure mat to assess and report sleep patterns. To evaluate our system we used real data collected in Heracleia Lab's assistive living apartment. Our method is non-invasive, as it does not disrupt the user's usual sleeping behavior and it can be used both at the clinic and at home with minimal cost.

Nighttime noise issues that interrupt sleep after cardiac surgery.

Abstract: Patients' perceptions of noise events that prevent/interrupt nighttime sleep after cardiac surgery and sleep promotion aids were studied for associations with patient characteristics. Overhead paging, equipment, and loud communication prevented/interrupted nighttime sleep; however, most patient characteristics were not associated with the presence or absence of these noise events. Patients selected pain medication to promote sleep. Other sleep aids were used infrequently. Behavioral and structural noise reduction interventions are needed to minimize sleep interruptions.

Energy-saving method and equipment for passive optical network (PON)

Abstract: The embodiment of the invention discloses an energy-saving method for a passive optical network (PON), comprising the steps as follows: an optical network unit (ONU) receives a sleep indication message from an optical line terminal (OLT), and goes into a sleep state based on the sleep indication message, wherein the sleep state comprises a sleep period and a pre-waking period; in the sleep period, the ONU closes the transceiving function of an optical module as well as an optical interface module and a central processing unit which are in the optical module; in the pre-waking period, the ONU maintains the closed state of the central processing unit, opens the transceiving function of the optical module and the optical interface module so as to receive a message from the OLT, and analyzes the message from the OLT via a media access control module; and if the analysis result shows that the message received in the pre-waking period is not the sleep indication message, the media access control module wakes up the central processing unit to restore the normal work state of the ONU

Method and system for managing user's sleep

Abstract: PROBLEM TO BE SOLVED: To provide an individual system for correlating an individual's sleep quality and behavior with an objective measure of how an individual behaves during the day. SOLUTION: A sleep management method and system for improving the quality of sleep of a user which monitors one or more objective parameters relevant to sleep quality of the user when in bed and receives from the user in waking hours via a portable device such as a mobile phone feedback from objective test data on cognitive and/or psychomotor performance. COPYRIGHT: (C)2011,JPO&INPIT

Notebook computer and power saving method thereof

Abstract: The invention relates to a notebook computer which comprises an infrared sensor, a South Bridge chip, a BOIS (Basic Input/Output System) chip, an internal memory and a CPU (Central Processing Unit), wherein the infrared sensor is used for detecting whether people exist in a set detection range or not and outputting a level signal according to a detection result; a GPIO (General Purpose Input/Output) pin of the South Bridge chip is used for receiving the level signal; a sleeping signal and an awakening signal are stored in the BOIS chip; the BIOS chip is also used for reading the level signal of the GPIO pin and correspondingly and selectively outputting the sleeping signal or the awakening signal to the internal memory according to the read level signal; and the CPU is used for reading the sleeping signal or the awakening signal received by the internal memory and controlling the notebook computer to sleep or awaken. The notebook computer can immediately fall into sleep when a user leaves, thus power is saved. The invention also provides a power saving method of the notebook computer.

Usb host wake from sleep state for mobile devices

Abstract: A USB host for wakeup from a sleep state includes a hold memory, a USB host controller, and a USB driver. When going to sleep, the USB driver sends a suspend command to the USB host controller in response to receiving a sleep command. The USB driver also reads a controller context from the USB host controller and saves the controller context in the hold memory. Thereafter, the USB driver turns off one or more supply potentials and one or more clocks in the host controller, and returns a sleep acknowledgement. While in sleep, the interface pins are placed in a hold state and notification to the operating system are disabled.

Electrocardiograph and blood pressure signals simulator

Abstract: System, methods, and apparatuses produce simulated human physiological waveforms such as electrocardiograph (ECG) and blood pressure signals where the microcontroller and/or digital-to-analog converters may be switched to a lower power-consuming state by programmable instructions and switched on in response to a programmable sleep timer.

Non-Volatile Storage Systems with Go To Sleep Adaption

Abstract: A non-volatile memory system goes into a low-power standby sleep mode to reduce power consumption if a host command is not received within delay period. The duration of this delay period is adjustable. In one set of embodiments, host commands can specify the delay value, the operation types to which it applies, and whether the value is power the current power session or to be used to reset a default value as well. In other aspects, the parameters related to the delay value are kept in a host resettable parameter file. In other embodiments, the memory system monitors the time between host commands and adjusts this delay automatically.

Sleep evaluation device and detection method in sleep evaluation device

Abstract: PROBLEM TO BE SOLVED: To provide a sleep evaluation device for detecting OSAS (Obstructive Sleep Apnea Syndrome) simply and accurately by alleviating a burden to a test subject.SOLUTION: The sleep evaluation device includes a sensor 30 including a body motion sensor 31 for detecting a body motion of the test subject and a microphone 32 for detecting a sound, and a controller 40 including a CPU 41 for computing to detect from the sensor signal an OSAS cycle which is a specific sleep pattern of OSAS defined by a temporal relation between a time series variation of a human body motion during sleep and a time series variation of the sound uttered by the human during sleep, and the CPU 41 detects the time series variation of the test subject during sleep based on the sensor signal of the body motion sensor 31, detects the sound corresponding to an OSAS snore from the sound signal, and detects the OSAS cycle based on the temporal relations.

Watch having sleep quality monitoring function

Abstract: The utility model discloses a watch having a sleep quality monitoring function, which comprises a casing, a circuit board, a vibration detecting device, a microprocessor, an alarm device, a display screen and a power supply. The microprocessor, the alarm device, the display screen and the power supply are mounted on the circuit board, the circuit board is fixed inside the casing, the vibration detecting device is fixed onto the casing and transmits movement information of a user to the microprocessor, and the microprocessor draws a sleep curve figure for the user according to the movement information and analyzes the sleep curve figure to judge sleep quality of the user so as to grade the sleep quality correspondingly. Further, the watch can automatically conclude sleep curves in a next period of time according to the sleep curve figure, and locates a time at the most sober state of the user according to the curves so as to start the alarm device. Therefore, the user can be prevented from being waken up in a deep sleep, and accordingly series problems caused by being waken up forcedly from the deep sleep of the user can be avoided.

Method and apparatus for transitioning a system to an active disconnect state

Abstract: A processor includes a processor core and a power management controller operable to receive a timer event, store the timer event, generate a hardware system sleep command to enter a hardware system sleep state, and restore the timer event upon exiting from the hardware system sleep state.

Power management system and method

Abstract: The invention provides a power management system and a method thereof.The power management system can be applied to the host of a computer and the host is coupled to a USB hub (USB Hub) to avoid the USB hub from entering into a sleep mode when the host is in a working state.The power management method comprises the steps of loading a filtration driving program (filterdriver), so that the host can detects the USB hub.The filtration driving program sends a first sleep input/output request packet (device sleep IRP request) by detecting a specific ACPI event so as to control the USB hub to enter the sleep mode,wherein the specific ACPI event is that the host enters into a sleep state.According to the invention, the USB hub mode can be changed according to the power state of the host, thereby increasing the control convenience.

Effects of pre-sleep simulated on-call instructions on subsequent sleep

Abstract: Nightly interventions, prevalent to on-call situations, can have negative consequences for those involved. We investigated if intervention-free-on-call-nights would also mean disturbance-free-sleep for people on-call. 16 healthy sleepers spent three nights in the laboratory: after a habituation night, reference and on-call night were counterbalanced. Subjects were instructed to react to a sound, presented at unpredictable moments during the night. Participants were unaware of the fact that the sound would never be presented. These vigilance instructions resulted in more subjective wake after sleep onset (WASO), lower subjective sleep efficiency and significantly lower experienced sleep quality. Objectively, a longer sleep onset, an increased amount of WASO and significantly lower sleep efficiency were observed. During deep sleep, significantly more beta activity was recorded. Apart from real nightly interventions increased vigilance during the night causes sleep to be less efficient and less qualitative as shown by an increase in wake-activity and a distorted sleep perception.

Sleep and wake-up methods and systems for equipment

Abstract: The invention discloses sleep and wake-up method and sleep and wake-up systems for equipment. The invention is mainly characterized in that: when a communication module and/or an application module in the equipment enters a sleep state, the universal serial bus (USB) interface connection between the communication module and the application module is disconnected, so that no current flows through the USB interface connection when the application module and/or the communication module embedded into the equipment enter the sleep state; therefore, the battery power of equipment for surfing the net is saved, and the standby time of the equipment for surfing the net is prolonged.

Power supply management method of input device

Abstract: The invention provides a power supply management method of an input device, comprising the following steps of: after the input device enters a shallow sleep mode, beginning timing and recording a trigger time of the input device; and updating the start time of a deep sleep according to the trigger time. After the input device is in idle for a period of time, the input device enters the shallow sleep mode, the trigger time of the input device returning from the shallow sleep mode to a working mode because of an operation of a user is recorded during the shallow sleep, and accordingly, the record of the trigger time is used as a mode for dynamically updating the start time of the deep sleep so as to achieve better energy saving efficiency.