Showing papers on "Sleep (system call) published in 2002"

Sleep forms memory for finger skills

Abstract: Practicing a motor skill triggers a process of memory consolidation that continues for hours after practice has ended, and becomes manifest in an improved skill at later testing. We used a sequential motor task (finger-to-thumb opposition task) to show that, in humans, the formation of motor skill memories essentially benefits from sleep. Independent of whether placed during daytime or nighttime, sleep after practice enhanced speed of sequence performance on average by 33.5% and reduced error rate by 30.1% as compared with corresponding intervals of wakefulness. The effect of sleep after learning proved to be stable when retesting was postponed for another night, to exclude effects of sleep loss and to assure that all subjects had sufficient sleep before retrieval testing. Also, the consolidating effect of sleep was specific for the motor sequence learned. It did not generalize to a similar sequence containing identical movement segments in a different order. Retention periods of wakefulness improved performance only moderately and only if placed during daytime. The observations demonstrate a critical role of sleep for storing and optimizing motor skills.

Sleep scoring apparatus and method

Abstract: A method and an apparatus are disclosed for scoring the quality of sleep experienced by a subject wearing the apparatus for a specified period. This sleep monitoring apparatus includes a motion sensor that quantifies the temporal variation in the subject's motion, an analog to digital converter to sample the sensor data, a microprocessor with embedded programmable memory to store control and processing firmware, a memory device for data storage, a display means, and a switch for staring and resetting the device. The firmware for this apparatus: (i) directs the microprocessor to sample sensor output at a prescribed time interval and to temporarily store this data in the memory device, (ii) directs the microprocessor to analyze the temporarily stored data to compute a sleep score based on the magnitude of movements recorded during the monitoring period, and (iii) controls the operation of the display means. Upon termination of the sleep period, the apparatus' display means will display a sleep score based on a scale of 0 to 100. A high score indicates restful sleep (very low movements), while a low score indicates excessive restlessness during the monitored sleep period.

Discriminating between an awake phase and a sleep phase of a patient in an active implantable medical device

Abstract: An active medical device having an improved discrimination between an awake phase of a patient and a sleep phase of a patient. This device measures a physiological parameter of a patient, delivers a physiological signal with a slow time response variation, in particular a signal of minute-ventilation (signal MV), and detects whether the patient is in a phase of awakening or sleep. An average (VE) of the signal MV is calculated over a given number of respiratory cycle and compared with a predetermined threshold (Threshold MV), such that a first state of awakening is determined when the average is higher than the threshold, and a first state of sleep is determined in the contrary case. The device also measures patient activity (signal G), using a signal having a short response time. The activity signal is compared with a predetermined threshold (Threshold G), and a second state of the patient is determined to be an awakening phase when the activity signal is higher than the threshold, and a sleep state in the contrary case. Detecting the phases of awakening and sleep also includes comparing the first state of awakening/sleep to the second state of awakening/sleep, and in the event of a discordance between these states, the response time of the physiological signal processing is modified, in particular by reducing the number of respiratory cycles over which the average MV signal (VE 128 , VE 64 ) is calculated.

Active medical device for the diagnosis of the sleep apnea syndrome

Abstract: An active medical device have an improved diagnosis of a sleep apnea syndrome. This device measures the respiratory activity of the patient, determines a state of activity, this state being likely to take, according to satisfaction of predetermined criteria, a value representative of a state of sleep of the patient, and analyzes a detected signal corresponding to the respiratory activity to detect, when the aforementioned state is a state of sleep, the presence of respiratory pauses, and thereby to produce an indicating signal of sleep apnea in the event of the occurrence of a respiratory pause of duration longer than a first predetermined duration. The analysis also includes inhibiting the production of the aforesaid indicating signal, or a treatment to resolve an apnea, when the duration of the detected respiratory pause is longer than a second predetermined duration, typically of at least one minute.

Intermediate wake mode to track sleep clock frequency in a wireless communication device

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.

A system and method for evaluating task effectiveness based on sleep pattern

Abstract: A method for evaluating the effectiveness of a person to perform a task based on his/her previous or predicted sleep activity is provided. The method can be used to predict changes in task effectiveness at any time of day, based upon numerous patterns of sleep and activity, either experienced or planned for the future. The method take into account progressive increases in sleep deprivation, the effects of the time of day on performance, and changes in the time when a person sleeps and works. The method also accounts for the quality of a sleep interval and a person's sleep inertia (52), the temporary slowing of performance immediately after awakening. The method is homeostatic. Gradual decreases in sleep debt decrease sleep intensity (42). Progressive increases in sleep debt (44) produced by extended periods of less than optimal levels of sleep lead to increased sleep intensity.

Memory control system

Abstract: The processor, upon fetching a sleep command, stops its own operation and outputs an internal power-down signal The power-down control circuit outputs, upon receiving the internal power-down signal from the processor, a control signal to put a volatile semiconductor memory connected to the system bus into a self refresh mode Thus, the processor can simply fetch the sleep command to put the semiconductor memory into the self refresh mode Since system programs need not include any processing program for putting the semiconductor memory into the self refresh mode, the software processing can be prevented from being complicated As a result, it is possible to reduce the burden on the program developers

Mobile communication system, mobile communication method, mobile terminal and base station

Abstract: In a mobile communication system for carrying out packet transmission/reception between a mobile terminal having a power saving mode to reduce a power consumption and a radio base station, 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 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.

Scan-based state save and restore method and system for inactive state power reduction

Abstract: A scan-based state save and restore method and system for inactive state power reduction. An integrated circuit (130) has an inactive state power reduction manager (160), normal circuitry and scan circuitry (150). Upon receipt of a sleep signal, the state of the normal circuitry is accessed by employing scan circuitry (150). The state is then stored in a memory (270). The power is disconnected from the normal circuitry. Upon wake-up, the normal circuitry is re-connected to the power (200). The state of the circuit is accessed from the memory (270) and restored to the normal circuitry by employing scan circuitry (150).

Sleep support system

Abstract: A sleep support system for comfortably supporting a user during sleep More particularly, a sleep support system for face-down sleep in essentially a sitting position The system is adapted for use with equipment and fixtures commonly found in patient recovery rooms, such as hospital beds and over-bed tables The system provides comfortable head and arm support with a plurality of user-selectable positional adjustments The system is foldable and portable The system may be adapted for use with a wheelchair

Information processing device with sleep mode function

Abstract: The present invention as disclosed hereby is to provide an information processing device with sleep mode function which is capable of running in a sleep mode, thereby reducing the power consumption for its accompanying device and main memory. In the information processing device with sleep mode function, its system CPU 10 during a normal operation mode loads a required control program from a ROM 12 to the main memory 11 and executes it to monitor an operating state of the accompanying device 2 - 9 , and then executes a sleep controlling program stored in a sleep ROM 13 when it is detected that any operation request for the accompanying device has not been performed within a predetermined period of time. Upon execution of this sleep controlling program, the accompanying device is powered down with the exception of its reactivation-request generating function part and the clock supply to the main memory, the power supply to the main memory or both of them is(are) turned off, thereby allowing the information processing device to place in a waiting state for an interrupt from the accompanying device. Accordingly, the primary power for the accompanying device and the main memory is not wasted, thereby providing reduction of the power consumption.

Method and system for dynamically determining sleep cycle values in a quiescent mobile vehicle

Abstract: The present invention provides a method of accessing a quiescent mobile vehicle using a wireless communication system. At least one transmit power parameter of a vehicle communication device is determined. At least one sleep duration value is calculated based on the transmit power parameter. The vehicle communication device is placed into a quiescent state based on the sleep duration value. Programs and systems of using the method are also provided.

On-board computer for processing sensor signals, user entered information has device for determining user tiredness from sleep information re last sleep and sensor-detected influencing parameters

Abstract: The device has a device for determining the tiredness of the user using sleep information regarding the last sleep and sensor-detected influencing parameters. Defined equations are used to determine the natural fatigue components sleep dependent components, sleep lethargy and a circadian component. The natural fatigue components are combined with at least one loading components to form a current fatigue value.

Sleep monitoring system and monitoring device

Abstract: PROBLEM TO BE SOLVED: To provide a sleep monitoring system and a monitoring device with which the sleeping state of a subject can be accurately monitored by a third person. SOLUTION: The sleep monitoring system is equipped with a sleeping state measuring device 11a which measures the sleeping state of a user, and a managing device 12a which monitors the sleeping state of the user. A data generating unit 63 of the sleeping state measuring device 11a generates staying-in-bed data and body movement data based on sleeping information on the user which is detected by a biological information detecting unit 31. Then, a web server 47 of the managing device 12a enables the staying-in-bed data and the body movement data received from the sleeping state measuring device 12a, and in addition, the falling into sleep and the awakening of the user distinguished by a distinguishing unit 49 to be browsed by terminal units of the family which are registered in advance. COPYRIGHT: (C)2004,JPO

Method and apparatus for information handling system sleep regulation

Abstract: An information handling system includes a microprocessor, a storage, a plurality of devices operatively connected to said microprocessor and a run voltage rail, a sleep regulator, and a power management controller The plurality of devices are further operatively connected to a run voltage power rail to operate in a run mode in response to a run voltage Vrun applied to the run voltage power rail The sleep regulator provides a sleep voltage Vsleep output Lastly, the power management controller determines a power savings sleep voltage for a run/sleep mode power management condition and controls the sleep power voltage output of the sleep regulator according to the power savings sleep voltage The power management controller is further configured to enable select ones of the plurality of devices to be operatively disconnected from the Vrun power rail and connected to the sleep voltage Vsleep output, wherein devices operatively connected to the sleep voltage Vsleep output operate in a sleep power mode

Master-slave communication system and electronic apparatus utilizing such system

Abstract: A communication system has a master device and a slave device clocked by the system clock generated by the master device for data transfer between them. When no data transfer takes place between them for a predetermined period, the slave device goes into a sleep mode. The slave device in the sleep mode can return to the active mode when it receives a system clock. Thus, the slave device can be placed in the sleep mode and return to the active mode without any additional signal lines. The communication system can save a large amount of power during the sleep.

Monitoring vehicle data bus awakening processes, initiates triggering from sleep or standby mode on reception of signals and stores them sequentially in memory

Abstract: Triggering occurs when the data bus is in a sleep- or standby mode. In this mode, fewer signals are sent the data bus, and/or its transmission/reception units are switched off. This compares with the more active transmission state. On recurrence of a data bus signal, the monitoring interval is triggered. The signal is registered from one line (CAN-H) of the data bus. This line is switched to a high impedance with respect to earth, in the sleep- or standby mode. During the process, data bus signals received, are entered sequentially as bit sequences into signal memory (5). The data bus signals are over-clocked by 5 times or more, with respect to their bit interval.

Bed with lighting

Abstract: PROBLEM TO BE SOLVED: To provide a bed with lighting providing optimum lighting when one falls into a sleep. SOLUTION: A CPU 41 is connected to a sleep light L1 provided in a head board of a bed with lighting through a sleep light driving circuit 51. When a start switch SW8 is turned on, the CPU 41 turns the sleep light L1 on. When a timer 41a incorporated in the CPU 41 keeps first elapsed time previously set, the CPU 41 lowers the luminance of the sleep light L1 until second elapsed time previously set.

Sleep-inducing system, sleep-inducting method, psychological physiological effect-imparting-supporting device, psychological physiological effect-imparting- device, psychological physiological effect-imparting method, psychological physiological effect-imparting system, program to make computer perform the method, and computer-readable recording medium on which program to make computer perform the method is recorded

Abstract: PROBLEM TO BE SOLVED: To stimulate the sensitive organ of a person who desires sleep, to accept the person's intensive reaction to the stimulation, and to analyze the stimulation and the accepted reaction; and also, to generate a next stimulation to promote sleep based on the analyzed result, to apply the stimulation to the person, and to induce the person to sleep. SOLUTION: This sleep-inducing device is used for a physiological body, and is equipped with a stimulation-imparting unit 20 which imparts the stimulation, and a reaction-accepting unit 30. In this case, the reaction-accepting unit 30 accepts the input reaction when the operated reaction by the physiological body to the stimulation which is imparted by the stimulation-imparting unit 20 is input. COPYRIGHT: (C)2003,JPO

Radio telephone capable of operating on time slot paging mode and operating method

Abstract: Prior to entry into a low-power sleep mode, a radiotelephone (104) in a radiotelephone system (100) calculates in advance the timing required to wake up selected portions of the radiotelephone and stores the calculated wakeup times in registers (216). Also prior to entry into sleep mode, local timing of the radiotelephone is synchronized to received PN roll boundaries from the radiotelephone system. In the sleep mode, the radiotelephone uses a sleep timer (210) to simulate system timing. When the sleep timer (210) matches the stored wakeup times, the radiotelephone re-activates the selected portions of the radiotelephone, such as an oscillator (116) and a radio frequency portion (109) of an analog front end (108), to exit the sleep mode and reacquire communication with the system. This also permits an early exit from sleep mode, for example to service an interrupt, while maintaining system timing.

Sleep information by Telephone: Callers Indicate Positive Effects on Sleep Problems

Abstract: There is a need to develop effective interventions for insomnia that are readily accessible and not too expensive. For the reason that earlier studies have already shown that direct contact with a sleep therapist is not always needed, telephone service may be useful to give insomnia patients education and instructions about sleep and sleep hygiene. In April 1998, the 'Sleep Line' was introduced in The Netherlands. People with sleep problems could dial a telephone number for information and tips. Randomly structured interviews by telephone were held among 302 of the 10.000 people who called the line in the first nine months of its existence. The average caller of the Seep Line is a middle aged and highly educated person. Sleep onset is the main complaint. Almost all subjects have sleep complaints a few nights per week or more, with a mean duration of five years. Callers listened mostly to general information about sleep and to treatments not involving hypnotic drugs. About one quarter of the callers experienced subjective improvements in their sleep after calling the line once or twice. This means that from the 10.000 people who called the line, the subjectively experienced sleep quality of approximately more than 2500 people may be improved. It is suggested that these positive results could be explained by the information about sleep and sleep hygiene advises given to the callers. We therefore conclude that minimal intervention using the Sleep Line is a useful supplement to more time consuming and expensive forms of sleep therapy.

Method and system for preserving and restoring scan- based state for inactive state power reduction

Abstract: PROBLEM TO BE SOLVED: To realize inactive state power reduction. SOLUTION: In this method and system for preserving and restoring a scan- based state for inactive state power reduction, an integrated circuit (130) is provided with an inactive state power reduction manager (160) and a normal circuitry and a scan circuitry (150). At the time of receiving a sleep signal, the state of the normal circuitry is accessed by using the scan circuitry (150). Then, the state is stored in a memory (270). A power source is disconnected from the normal circuitry, In wake-up, the normal circuitry is reconnected to a power source (200). The state of the circuit is accessed from the memory (270), and restored to the normal circuitry by using the scan circuitry (150).

Abnormality detecting system

Abstract: PROBLEM TO BE SOLVED: To allow a control ECU to easily detect the abnormality of devices to be controlled forming a network. SOLUTION: Each of ECUs 311-334 is always supplied with power so that communications can be maintained even when vehicle elements 511-534 to be controlled are turned into an inoperative state. When the ECU 311-334 cannot be put in a sleep state, sleep NG notification including their own identification information is transmitted. An abnormality detecting device 4 connected through communication lines 21-23 to the ECU 311-334 detects the ECUs 311-334 which are in active stages beyond a waiting time until their transition to their sleep operations by monitoring the sleep NG notification, and stores the identification information of the detected ECU 311-314. When the vehicle elements 511-534 to be controlled are abnormal, the activation factors are continued so that the abnormal parts can be specified from the identification information.

Voice output control circuit, display brightness control circuit, voice output and display brightness control circuit, method of control voice output, method of controlling display brightness, method of controlling voice output and display brightness, voice output control program recording and storing medium, display brightness control program recording and storing medium, and voice output and display brightness control program recording and storing medium

Abstract: PROBLEM TO BE SOLVED: To provide a stereo equipment, AM/FM receiver, or the like which will not make one conscious about bothering the people around one, even if the volume is set to one's desired value when trying to fall a sleep, while listening to music or the like by starting up a sleep timer, and which will hardly prevent one from getting to sleep due to the brightness of a display, and for which power consumption will not be wasteful. SOLUTION: The voice output is reduced according to the remaining time of the sleep timer. Alternatively, the brightness of a display section 11 is decayed as the remaining time of the sleep timer is reduced. Or, both the voice output and the brightness of the display section 11 are decayed, as the remaining time of the sleep timer is reduced.

Method for lock in personal digital assistants mode of personal portable terminal

Abstract: PURPOSE: A locking method in a PDA mode of a portable terminal is provided to convert into a sleep mode when a sleep timer elapses in a PDA mode standby state, and to present the PDA mode standby state on a screen after a locking state is cancelled, thereby preventing personal damage caused by the locking state CONSTITUTION: When a PDA mode is in a standby state(11), a controller decides whether a sleep timer elapses(12) If so, the controller converts into a sleep mode, and drives a screen saver(71) The controller decides whether a call is generated from outside(14) If so, the controller cancels the sleep mode(15), and presents a password input window(73), then rings a bell(17) The controller decides whether a password is inputted by a user(74) If so, the controller presents an incoming call message window(75) The controller decides whether a 'yes' button is pressed(76) If so, the controller presents a PDA mode speech state(19)

Sleep cycle alarm timepiece

Abstract: PROBLEM TO BE SOLVED: To provide a sleep cycle alarm timepiece capable of notifying a person of time to conformably wake up by combining a device for detecting the time of having gone to sleep with a clock with an alarm device and issuing an alarm in every sleep cycle of 90 minutes on the basis that 90 minutes are one cycle in human sleep with REM sleep and non-REM sleep combined together and that he can be refreshed and wake up in one and a half hours, three hours, four and a half hours, six hours, seven and a half hours, or nine hours after going to sleep SOLUTION: It is utilized that the electric resistance of an organism changes in a human before and after going to sleep An organism electric resistance measuring device is built in part of the back lid of a watch with an alarm device to measure changes in electric resistance at part of a wrist before and after going to sleep When a predetermined rise is detected, the time of having gone to sleep is determined to be a signal to turn on the alarm which sounds in a cycle of 90 minutes

Segmental organization of sleep

Abstract: Segmental organization of sleep was studied in healthy subjects and insomniac patients. Theoretical and practical aspects of sleep organization are discussed. The disintegration syndrome (decreased stability of development of sleep stage segments and change in sleep stage sequence characteristic of normal sleep) is an inherent feature of sleep disorders and a fine index of adaptive possibilities of sleep systems. It is suggested that each segment of any sleep stage has its specific functional role different from the functional significance of the stage as a whole. Depending on the time of appearance of any specific segment, it can be an important preliminary of transition to another functional state and be involved in preparation for triggering corresponding sleep-organizing systems. At the same time, it can be a reflection of the process of estimation of the achieved result. The dynamic change in sleep stages is determined by subsequent activation of different brain structures and also suggests a possibility of a change in the functional role of a certain stage depending on the initial functional state of sleep systems.

Power control system

Abstract: PROBLEM TO BE SOLVED: To reduce the number of connection lines to send a sleep release signal to a sleep controller from a detected signal generator circuit. SOLUTION: This control system has a sleep controller 2, a print engine controller 3 to carry out printing, a detected signal generator 4 to detect the cause to release sleeping and to generate a sleep release signal depending on the cause, a signal collecting circuit 11 to collect the sleep release signals generated in the detected signal generator 4 into a single sleep release signal, a single connection line 12 to send the collected sleep release signal generated in the signal collecting circuit 11, and a consumption power saving circuit 8 controlled by the sleep controller and to cut off power to the print engine controller 3.

Multiplex communication apparatus for vehicle

Abstract: The simple and easy device configuration and a simple, multi-vehicle possible to determine the transition condition is satisfied in the sleep state is determined by an easy procedure communication device is provided. This communicates apparatus includes a specific communication node (node) and a plurality of common communication node. A specific communication node, the time from the common communication node from the first information to be sent, respectively do not determine the communication request continues to be transmitted to the sleep transition instruction signal to the common communication node. Communication node, without having to determine the necessity of the transition to the sleep state to the individual, according to the sleep transition indication signal from a particular communications node must transition to the sleep state.