Gait analysis is a valuable tool for obtaining quantitative information on motor deficits in Parkinson's disease (PD). Since the characteristic gait patterns of PD patients may not be fully identified by brief examination clinic, long-term, and unobtrusive monitoring their activities essential, especially nonclinical setting. This paper describes single accelerometer-based system assessment ambulatory properties. Acceleration data were recorded continuously up to 24 h from normal subjects,...

Gait analysis is widely recognized as a promising tool for obtaining objective information on the walking behavior of Parkinson's disease (PD) patients. It especially useful in clinical practices if gait properties can be captured with minimal instrumentation that does not interfere subject's usual behavioral pattern under ambulatory conditions. In this study, we propose new system based trunk-mounted acceleration sensor and automatic detection algorithm. The algorithm identifies signal high...

This paper describes a noninvasive algorithm to estimate the sleep stages used in Rechtschaffen and Kales method (R-K method). The heartbeat body-movement signals measured by pneumatic are instead of using Eletroencephalogram Electromyography R-K method. From measurements, we defined two indices that indicate condition REM depth. Functions obtain incidence ratio standard deviation extracted elements for each stage were also determined, age group subjects. Using these functions, an classify...

This paper describes a novel bed sensing method for noninvasive, constraint-free, subliminal detection of biosignals. The sensor system detects the heartbeat, respiration, body movement, position change, and scratching motion person lying or sleeping on bed. These biosignals provide not only basic medical information but also sophisticated details about sleep conditions. Thus, can be used to monitor health condition people at home, as well that patients in hospital. Furthermore, detect...

This paper describes a novel method for measuring golf swing angular motion in global coordinate system using the 3-D acceleration and velocity detected by local sensor set at grip end of club. Optical direct linear transformation (DLT) is conventional sports motion; however, accurate localization coordinates precise setting infrared high-speed cameras test field are essential. Furthermore, reflectors must be attached to moving object. The itself fine-tuning expensive, but an accurately can...

Falls are serious issues encountered in the lives of elderly living alone. Since cannot stand up without support from a caregiver, or because they may lose consciousness after falling, remain on floor for an extended period time fall; this leads to complications including hypothermia, dehydration, and sometimes, even death. Therefore, immediate detection falls is necessary. In paper, we propose fall system based microwave Doppler sensor. proposed system, apply frequency distribution...

This paper describes a novel strategy for providing ubiquitous medical and healthcare monitoring through the use of mobile phone equipped with low-frequency microphone sensitive to pressure waves in frequency range 0.1 Hz 10 kHz. The is placed sealed air cushion under pillow or mattress subject's bed. picks up signals from heartbeat, respiration, body movement snoring transmits them center where an auto-diagnosing system specialist monitors health condition.

In the graying society, it is important to monitor health-related biosignal with sensors in living environment for sake of emergency response and long-term health management. order use data monitoring systems daily at home, noninvasive system maintenance are crucial. We propose a method estimating sleep stages sleeping subjects through measurement heartbeat respiration using pneumatic an air mattress. However, incurs periodically refilling this paper, another method, which uses tube made...

The management of health through daily monitoring heartbeat and respiration signals is major importance for early diagnosis to prevent diseases the respiratory circulatory system. However, such possible only if system physically psychologically noninvasive. In this paper, an unconstrained method measuring signals, by using a thermistor measure air flows from mattress tube accompanying subject's respiration, proposed. SN ratio with interference opening closing door as environmental noise was...

This paper describes a non-invasive, less restrictive, stable measurement system for brain-computer interface (BCI) second-language (L2) learning. The outputs the arousal of Yerkes-Dodson law. We employ non-invasive near-infrared spectroscopy (NIRS) as basic device to measure blood volume. However, volume measured by NIRS includes base-line drift and is not stable. Here, we introduce new drift-free variable defined flow, which time derivative Problems be considered are: 1) Can flow represent...

This paper describes a method to estimate the measure of human energy expenditure referred as metabolic equivalents (METs). The is defined by an index amount person expends through normal daily activities. average MET values are type activity; for example, brisk walking corresponds 4 METs. lists 107 activities and corresponding values. However, determine consumed in day, each activity its duration must be noted, which inconvenient time consuming. Here, we consider quantitative METs from...

The judgment standards of R-K method include ambiguities and are thus compensated by subjective interpretations sleep-stage scorers. This paper presents a novel to compensate uncertainties in judgments the sleep-model estimation approach describing probabilistic terms. Kalman filter based on two sleep models with no body movement was designed. Sleep stages judged three different scorers were rejudged filter. stochastically estimated from biosignals 15 nights' data scores evaluated 5 nights....

Fall accidents are serious problems, especially for elderly people living alone. This is why many fall event detection methods have been proposed in the past. When constructing multiple classification models, a method expected to be constructed every and nonfall actions. However, context of IoT, it would challenging, if not impossible, cover all scenarios, because necessary keep computational cost low. Thus, we propose hidden Markov model that aggregates actions measured with single Doppler...

Sensing the position and movement of accelerator pedal in a vehicle is important for acceleration control safety while driving. The controlled by foot, but precise adjustment requires much training because driver must rely on somatosensory cues, which provide limited feedback. In this study, we propose periodic tactile feedback to an additional cue. We conducted experiment using driving simulator compare lap time, rate off-track incidents subjective evaluation controllability recorded...

The severity of skin diseases accompanied by itch is related to the frequency itching; thus, ratio total scratching time measurement (TST [%]) a useful index for diagnosing such as atopic dermatitis. To grasp trend patient's TST [%], daily monitoring motion effective, but it important carry out measurements under unconstrained conditions so not burden patient. In this paper, we propose non-wearing sensing method measuring motions while patient sleeping. device used in proposed composed...

This paper describes a novel DC-coupled single input preamplifier which is robust to drift noise and variation due the circuit operation conditions. The intended for capacitive sensors such as electret film type sensor, one of most sensitive accurate presently available. There are both AC-coupled conventional preamplifiers available sensors. However, do not always suppress variation, while require large capacitor expand frequency range, thus making large-scale integration (LSI) very inducing...

This paper describes an unconstrained pneumatic method of estimating the δ-wave activity brain from heartbeat signal. Based on experiments showing that transinformation signal corrupted by body movement was correlated with activity, we developed a percentage included in EEG transinformation. The comb filtering technique used to obtain accurate We applied proposed young normal subjects evaluate method. As result, correlation between δ -wave and 0.727 average error estimates 14.9%. were shown...

Movies, comics, and video games frequently involve robotic heroes composed of metallic parts. Although these characters exist only in the realm fantasy, many us would be interested becoming them, if for a short time. The question therefore naturally arises: how it feel to robot?

A ballistocardiogram (BCG) is a recording of the mechanical movement body caused by cardiac ejection blood. We propose method to obtain BCG utilizing pressure inside sensor tube placed between cushion and bed frame. theoretical model propagation through that generates presented investigate viscoelasticity effect. The stiffness constants damping coefficient an elastic memory foam were investigated. also investigated influence diameter on sensitivity these different cushions. Finally, subject...