Showing papers on "Sleep (system call) published in 2003"

Sleep quality data collection and evaluation

Abstract: A sleep quality assessment approach involves collecting data based on detected physiological or non-physiological patient conditions. At least one of detecting patient conditions and collecting data is performed using an implantable device. Sleep quality may be evaluated using the collected data by an implantable or patient-external sleep quality processor. One approach to sleep quality evaluation involves computing one or more summary metrics based on occurrences of movement disorders or breathing disorders during sleep.

Sleep detection using an adjustable threshold

Abstract: Devices and methods for sleep detection involve the use of an adjustable threshold for detecting sleep onset and termination. A method for detecting sleep includes adjusting a sleep threshold associated with a first sleep-related signal using a second sleep-related signal. The first sleep-related signal is compared to the adjusted threshold and sleep is detected based on the comparison. The sleep-related signals may be derived from implantable or external sensors. Additional sleep-related signals may be used to confirm the sleep condition. A sleep detector device implementing a sleep detection method may be a component of an implantable pulse generator such as a pacemaker or defibrillator.

Sleep state classification

Abstract: Systems and methods for sleep state classification involve detecting conditions related to sleep, including at least one condition associated with rapid eye movement (REM) sleep. Additionally, a condition modulated by the sleep-wake status of the patient may be detected. A medical system that is partially or fully implantable incorporates sensors and circuitry for detecting and processing the sleep-related signals. A sleep state processor classifies the patient's sleep state based on the sleep-related signals. Sleep state classification may be used in connection with the delivery of sleep state appropriate therapy, diagnostic testing, or patient monitoring.

Unobtrusive monitoring of sleep patterns

Abstract: Disrupted sleep is a common problem in the elderly, due to age-related changes in health, lifestyle, and the physiological aspects of sleep. Severe sleep disturbances lead to impaired functioning, reduced quality of life, and increased health care costs. Therefore, monitoring of sleep patterns in the elderly is important. However, current methods for monitoring sleep are inadequate. In this paper, we use load cells for unobtrusive continuous monitoring of sleep patterns. Load cells are placed under a bed, and sleep characteristics such as bedtime, wake up time, and number and duration of naps are inferred from the load cell data. Using information from each load cell individually, we can also identify a person's position in bed, and, consequently, detect position shifts. We describe the algorithms for computation of the sleep characteristics and for assessment of the person's position in bed. We conclude by discussing the limitations in our approach, and the work we intend to pursue in the future.

Timer-based sleep for terminals in wireless communication systems

Abstract: Techniques for performing timer-based sleep to extend sleep time and thus battery life for a terminal in a wireless communication system. The likelihood of data traffic may be related to recent usage. If recent usage indicates that data traffic is unlikely, then the terminal can continue to maintain the link but monitor the signals from the system at a reduced rate. In one method, the probability of data traffic for the terminal is initially estimated (e.g., based on time since last activity and a particular usage model). A timer value is then determined based on the estimated probability of data traffic. The timer value may be modified based on an event, which may relate to link maintenance, hand-off, and so on. Sleep is then performed for the duration corresponding to the unmodified or modified timer value and may extend past one or more designated paging slots.

Techniques for transitioning control of a serial ATA device among multiple hosts using sleep and wake commands

Abstract: A system has a Serial ATA device and a subsystem. The subsystem includes multiple hosts, and a communications medium which interconnects the hosts to the device. The hosts are configured to share control of the device through the communications medium. First and second hosts, when transitioning control of the device, are configured to (i) send a sleep command from the first host to the device, the sleep command directing the device to transition from a normal operating mode to a sleep mode, (ii) provide a notification signal from the first host to the second host, the notification signal indicating that the first host has released control of the device to the second host, and (iii) send a wake command from the second host to the device in response to the notification signal, the wake command directing the device to transition from the sleep mode to the normal operating mode.

Apparatus and program for sleep support

Abstract: PROBLEM TO BE SOLVED: To provide an apparatus and a program for sleep support which enable a user to keep on sleeping until the planned hour of rising and wake up comfortably even the sleep is not deep enough. SOLUTION: The sleep supporting apparatus 1 is constituted of a time setting means 3 which comprises the well-known timer and can set the planned hour of rising, a biological information detecting means 5 to detect the biological information, a sleep situation judging means 7 which judges the sleep situation on the basis of the biological information, a controlling means 9, and an awakening means 11. The awakening means 11 adjusts the sleep situation by the motion intensity based on the judgement of the sleep situation during a sleep situation adjusting period before the planned hour of rising. COPYRIGHT: (C)2005,JPO&NCIPI

Home health monitoring system in the sleep

Abstract: This paper describes a development of health monitoring system that uses a non-invasive type microphone based pressure sensor The system can estimate the sleep stages from the heartbeats and body motion measured by the sensor The algorithm for sleep stages estimations as implemented to the single chip microcomputer The validity of the proposed system is confirmed by comparing the conventional sleep stage estimation results

Sleep cycle alarm clock

Abstract: PROBLEM TO BE SOLVED: To provide a clock letting a user know comfortable waking time by detecting the time when the user falls asleep or starts his first REM sleep to sound an alarm every sleeping cycle of 90 minutes, based on the fact that the human sleep has a cycle of 90 minutes for REM sleep and non-REM sleep combined, which means that one can wake up refreshed if awakened after one and a half hours, three hours, four and a half hours, six hours, seven and a half hours, and so on, of sleep. SOLUTION: Pulse rate drops gradually after one falls asleep, and after reaching a minimal value, it rises greatly (about 10%) at the beginning of first REM sleep. This change is detected and signaled to a wristwatch or a clock having an alarm device to switch on an alarm that sounds every 90 minutes. Changes in pulse rate are detected by a photosensor attached to a fingertip and a built-in computing circuit is used for such a control as switching the alarm on.

Processor state aware interrupts from peripherals

Abstract: A method, apparatus and computer product wherein interrupt thresholds are automatically adjusted based on the current state of the processor. The processor provides an output signal, possibly on one or more lines, that is indicative of the state the processor is in such as active, idle sleep. The peripherals monitor this signal and their interrupt thresholds are varied to be low when the processor is active and to be high when the processor is asleep. This causes the peripherals to delay their respective interrupts when the processor is asleep. When the processor is awakened, all peripherals requiring it may be serviced.

Mobile communication system, method, mobile terminals and base stations

Abstract: In a mobile communication system for carrying out packet transmission/reception between a mobile terminal (13) having a power saving mode to reduce a power consumption and a radio base station (14), a packet type of a packet is judged, and a sleep timer value indicating a time duration since a last packet is transmitted/received until the power saving mode starts is set according to a judgement result. Then, at least one sleep timer (32a, 32b) for measuring an elapsed time since the packet is transmitted/received is activated, and the mobile terminal is controlled to execute the power saving mode at a timing at which the elapsed time measured by the at least one sleep timer exceeded the sleep timer value.

Sleep recovery circuit and method

Abstract: Systems and methods of recovering a device from a sleep mode of operation are described. In one aspect, a device includes a sleep recovery circuit that is operable to transition from a first signal detection mode to a second signal detection mode in response to detection of a first signal characteristic in an input signal. The sleep recovery circuit also is operable to transition from the second signal detection mode to a third operational mode in response to detection in the input signal of a second signal characteristic different from the first signal characteristic.

System and method for transitioning a system comprising a microcontroller into a low power state in response to a first sleep type which is not recognized by part of the system and a second sleep type which is recognized by part of the system

Abstract: A computer system having an Advance Configuration and Power Interface-compliant, or ACPI, operating system performs certain machine specific tasks before going to a low power state. When the computer operating system indicates that entry into the low power state is desired, a microcontroller embedded in an input/output chip is alerted. Synchronization between the main processor of the computer system and the embedded microcontroller of the ACPI operating system is achieved, reducing the likelihood of system failure on the next boot operation. The embedded microcontroller then also causes the state of devices connected to the input/output chip to be saved. This helps the machine to go to a known state during the resume process.

Semiconductor integrated circuit with sleep memory

Abstract: A semiconductor integrated circuit operating in an active state and a sleep state has a power line that is branched through a first transistor to a first virtual power line and through a second transistor to a second virtual power line. The first transistor is switched on in the active state and off in the sleep state; the second transistor is switched off in the active state and on in the sleep state. The first virtual power line powers logic circuits. The second power line powers a memory circuit that stores necessary logic-circuit signal levels during the sleep state. The memory circuit does not consume power in the active state.

Method for modifying life rhythm

Abstract: PROBLEM TO BE SOLVED: To provide a method for modifying a life rhythm used for returning a once disturbed life rhythm to a normal life rhythm which allows comfortable awakening while a required sleeping time is assured. SOLUTION: Sleep stages are detected using characteristic values of power spectral density signals acquired from heart rate signals or R-R interval values of the heart rate signals. An amount of sleeping is calculated by multiplying each of the lengths of the REM sleep, the light non-REM sleep and the deep non-REM sleep by each weighting factor and by adding the obtained values together. In an alarm control step, a set amount of sleeping is calculated on the basis of preexamined amount of sleeping that allows a subject to awake comfortably, and an alarm signal is put out during the REM sleep period in the late sleep stage. Part or all of the measured data and the control data of a sleeping time calculating step for calculating the amount of sleeping from the sleep stages and of the alarm control step for determining the set amount of sleeping and the time of rising are acquired via a communication means. COPYRIGHT: (C)2005,JPO&NCIPI

Method and system for extending backup battery life in primary line customer premises equipment

Abstract: Current to a relay causes a telephone to be connected to a SLIC Following LOOP, a sleep switch opens to interrupt current to the power supply converter after a first predetermined period expires If the telephone is on-hook, loss of current to the relay causes disconnection from the SLIC, but causes connection to a battery Current sensed from the battery through an off-hook hook switch generates a current signal The current signal closes a current switch, which is in parallel with the open sleep switch, thereby providing a current path to the converter The sleep switch then makes and then the current switch breaks After awakening, a ring-back signal informs a user that telephony service has been restored and a message may indicate that telephony service is being sought When the telephone is placed back on-hook, counting of a second predetermined period starts, after which the sleep switch opens again

Self-control air fan with timing delay

Abstract: An automatic controlled timing vent fan consists of a group of circuits including a part of lamp trigging fan and a part of low voltage power supply, a group of all the day cyclic timer and delayed cut off timer with a phase inverter, a group of electronic switch circuits, a group of sleep timer, which continues to output signals until the preset delay time to stop the vent fan after the lamp turned off while provides a signal to sleep timer that is connected with the delayed cutoff timer and all the day cyclic timer.

System for executing prescribed process during operating system is in sleep state using information stored in common area

Abstract: The present invention relates to an information processing apparatus such as a personal computer and an information processing program that is executed there, and the process is immediately executed while the power consumption is suppressed. A program that is operable even when the operating system is in its state of sleep is prepared. By supplying a power source to only the necessary components, a prescribed process is executed with that program while the operating system is kept in its state of sleep.

Method for determining sleep phase

Abstract: PROBLEM TO BE SOLVED: To solve the problem with a method of determining sleep phases: that is, while monitoring sleep conditions is indispensable for pathological analysis and health care associated with sleep disorders and sleep deprivation, and there is a sleep polygraph measuring method as an international standard for detecting sleeping conditions, it causes psychological pain as it requires a subject to wear a number of detectors, making the difficult to be obtained from the natural state of the subject. SOLUTION: Efforts are made to make more natural a measuring method that constrains a subject, and a means of indirectly gathering information from the subject's body by use of an air mat is an excellent method among these. However, the data available cannot help but become scarce, and conventionally there is only such a simple analysis as making a distinction between awakening and sleep or between REM sleep and non-REM sleep. Then, a method of classifying the data for analysis is established, so that six sleep phases conforming to the international standard can be identified based on the method. Thus, a variety of analyses, diagnoses and measures on sleep are taken more universally while eliminating such disturbances as differences among individuals and among physical conditions.

Data transfer system

Abstract: PROBLEM TO BE SOLVED: To increase the efficiency of processing of a plurality of devices while saving on power by a simple configuration, in a data transfer system having a plurality of devices connected to a common bus so as to occupy the bus in sequence for data transfer. SOLUTION: A circuit 201 monitors an occupancy status of a system bus 104, and when detecting an unoccupied bus idle state, starts a timer 203 to measure the duration of the bus idle state. When the duration reaches a given time T1, a signal 207 causes a sleep circuit 204 to disable a clock enabling signal 108, which in turn stops a clock signal at a high level. When the duration reaches a given time T1+T2, a further signal 207 causes the sleep circuit 204 to enable a sleep signal 118, which in turn stops the clock signal at a low level and powers off most parts of particular devices connected to the bus 104 into a sleep state. COPYRIGHT: (C)2004,JPO&NCIPI

Peripheral device, server system, client device, network device system, device searching method, storing medium for storing computer-readable program, and program

Abstract: PROBLEM TO BE SOLVED: To freely return to a data processing waiting state by canceling a sleep mode by an instruction from a proxy response server corresponding to a search request from a client device connected to a network after shifting to the sleep mode while maintaining a power saving state without responding to a normal peripheral device search request. SOLUTION: After a printer 301 as a peripheral device reports a sleep shifting request to the proxy response server 200 connectable to a LAN 101 at the time of shifting to the sleep mode from a normal data processing waiting state and the proxy response server 200 accepts the sleep mode shifting request, the sleep mode is canceled to return to the data processing waiting state based on the sleep canceling request from the proxy response server 200 in the case that the proxy response server 200 accepts the sleep canceling request from any of client PCs 100 connected to the LAN 101. COPYRIGHT: (C)2005,JPO&NCIPI

Brief behavior therapy for sleep‐habit improvement in a work place by correspondence

Abstract: The effects of mediated minimal behavioral intervention on poor sleepers were examined. A behavioral sleep education trial was applied to 114 Japanese workers. The program was designed as a complete self-help approach by means of mediated intervention. The self-checking of sleeping habits, goal setting, self-monitoring, and reinforcement were used as behavior modification techniques. A manual was also referred to. After the intervention, six kinds of sleep-related behaviors were significantly improved. As for sleep, total sleep time was significantly increased, sleep latency, time in bed after sleep offset shortened, and sleep efficiency was also increased. These results suggest that a simple behavioral approach is effective in the improvement of sleep quality.

Low frequency sleep clock error correction within a mobile station operating in a slotted paging mode

Abstract: Various techniques for improving a wireless communication device are described. The techniques may include reducing power in a wireless communication device for a first sleep period and then increasing power in the wireless communication device for an intermediate wake period after the first sleep period to estimate an error of the sleep clock. The method may further include reducing power in the wireless communication device for a second sleep period after the intermediate wake period. The intermediate wake mode implemented during the intermediate period can be used to estimate the error of the sleep clock without performing one or more tasks associated with an awake mode, such as demodulation. The techniques may facilitate the effective use of low frequency low power clocks for sleep mode, even when relatively large slot cycles are defined within a slotted paging system.

Information processing apparatus, and information processing program storage medium

Abstract: The present invention relates to an information processing apparatus such as a personal computer and an information processing program that is executed there, and the process is immediately executed while the power consumption is suppressed. A program that is operable even when the operating system is in its state of sleep is prepared. By supplying a power source to only the necessary components, a prescribed process is executed with that program while the operating system is kept in its state of sleep.

Appratus for inducing sleep and using method thereof

Abstract: PURPOSE: An apparatus and method for inducing sleeping are provided to optimally induce sleeping by outputting the oscillation and/or the ultrasonic of the frequency band range detected by the result of the repetitive study according to the physical state of the user while inputting the physical information of the user. CONSTITUTION: The apparatus for inducing sleeping comprises an input part(10) provided with a timer switch(11), a power switch(12) and on switch(13) to input the options of the user; a checking part of sleeping state(14) to detect a state from the time the user begins to sleep to the time the user sleeps completely while checking the amount of a circulated blood; a microprocessor(15) to control behavior when user sleeps or gets up by the detected result; a memory(16) to store the detected result or options of the user and then output while controlled by the microprocessor(15); a timer(17) to output time information while controlled by the microprocessor(15); a current controller(18) to control current size output while controlled by the microprocessor(15); an oscillation motor(19) which is worked by the current supplied via the current controller(18) and generates an oscillation of 1.5 to 2.5 Hz; and a frequency generator(20) to generate a delta wave of 1.5 to 2.5 Hz delivered via the current controller(18) and output it through a speaker(21).