We propose two on-line algorithms for stride parameter estimation an in-shoe motion-sensor system (IMS) system: one segmentation based on stable foot-flat detection using foot-sole angle and the other a three-dimensional zero-velocity-update accurate parameterization. developed small lightweight IMS device, which consists of inertial measurement unit, micro control peripheral electrical components, integrated with insole so that it can be placed inside shoe at arch foot. Stride parameters,...

Identifying and monitoring overpronation oversupination in the long term during activities of daily living are essential for people's ambulatory health. Using an in-shoe motion sensor (IMS) with power-saving functions is a potential solution. In this study, we challenged development estimation model foot function using center pressure excursion index (CPEI) as via linear multivariate regression, which sufficiently light type IMS. Data collected from 65 17 participants were involved...

To expand the potential use of in-shoe motion sensors (IMSs) in daily healthcare or activity monitoring applications for healthy subjects, we propose a real-time temporal estimation method gait parameters concerning bilateral lower limbs (GPBLLs) that uses single IMS and is based on event detection approach. validate established methods, data from 26 participants recorded by an reference 3D analysis system were compared. The agreement between proposed was evaluated intraclass correlation...

Frailty poses a threat to the daily lives of healthy older adults, highlighting urgent need for technologies that can monitor and prevent its progression. Our objective is demonstrate method providing long-term frailty monitoring using an in-shoe motion sensor (IMS). We undertook two steps achieve this goal. Firstly, we used our previously established SPM-LOSO-LASSO (SPM: statistical parametric mapping; LOSO: leave-one-subject-out; LASSO: least absolute shrinkage selection operator)...

Mobility is a crucial physical factor that highly correlated with fall risk and can be modified by exercise. The timed up go (TUG) test outcome metric represents mobility. Monitoring mobility in daily living essential for prevention older adults. In this study, we aim to develop models estimating TUG-represented single stride of foot motion measured an in-shoe sensor (IMS). addition, tested the validity individual robustness these on separately recruited subjects. As result, discover novel...

Knee joint function deterioration significantly impacts quality of life. This study developed estimation models for ten knee indicators using data from in-shoe motion sensors to assess movement during everyday activities. Sixty-six healthy young participants were involved, and multivariate linear regression was employed construct the models. The results showed that eight out achieved a “fair” “good” agreement based on intra-class correlation coefficients (ICCs), with three angle reaching...

Our purpose was to demonstrate the possibility of providing foot-healthcare application by using an in-shoe motion sensor (IMS) through validating feasibility applying IMS for measuring first metatarsophalangeal angle (FMTPA), which is most important parameter regarding common foot problem hallux valgus. Methods: The signals can represent motions when mid-foot and hindfoot were modelled as a rigid body. FMTPAs be estimated from foot-motion measured embedded beneath arch near calcaneus side...

Falls rank as the second main cause of accidental death and injury in older adults, so technologies are urgently needed that accurate, inexpensive, easy to use administer fall risk assessments daily living. In this study, first stage assessing living, by using in-shoe motion sensor (IMS), we aim develop an assessment method for dynamic balance ability is important factor assessment. Sixty-four elderly participants were recruited constructing model, 20 other model validation. We used...

An algorithm has been constructed for estimating minimum toe clearance (MTC), an important gait parameter previously proven to be a critical indicator of tripping risk. It uses data from reported in-shoe motion sensor (IMS) detecting events. First, candidate feature points in the IMS signal use MTC events were identified. Then, temporal agreement between each point and target event was evaluated. Next, accuracy precision estimated using evaluated reference value obtained 3-D optical...

A 3-1/2 inch magnetic disk drive equipped with a novel load/unload mechanism using multilayer piezoelectric actuator was developed. Using this drive, the velocity influence and slider initial orientation influence, particularly pitch angle, for contacts between during process were experimentally investigated. The dynamic loading criteria derived from experimental results clarified. Applying condition to several hard drives, 20000 cyclic tests completed without any head/disk interface...

Deterioration of knee joint function greatly affects quality life. Therefore, technology is needed that accurately, inexpensively, and easily measures function. As the first step for deterioration assessment in daily walking, we developed estimation models six parameters capture features healthy movement by using an in-shoe motion sensor (IMS). We recruited 72 participants to construct models. Using intra-class correlation coefficients (ICCs), showed five achieved "fair" or "good" agreement...

Lower back pain is an extremely common health problem. Therefore, accurate, inexpensive, and easy-to-assess technology needed to assess lower during daily activities. We respectively constructed models for estimating the range of pelvic motion gait (RoPM) in sagittal, frontal horizontal planes, by using in-shoe sensors as first step assessment activities, e.g., walking. successfully collected data from 45 healthy participants construct estimation models. found a correlation between foot RoPM...

Lower extremity strength (LES) is essential to support activities in daily living. To extend healthy life expectancy of elderly people, early detection LES weakness important. In this study, we challenge develop a method for assessment living via an in-shoe motion sensor (IMS). construct the estimation model, collected data from 62 subjects. We used outcome five-times-sit-to-stand test represent performance as target variable. Predictors were constructed subjects' foot motions measured by...

The authors propose a novel head/disk interface mechanism in which head flies over ultrasmooth, nontextured disks. A ramp loading designed with an emphasis on its slider roll control capability has been developed to increase reliability during load-unload operations. Improved characteristics, key parameter for reliable under sub-sub-micron spacing were first predicted by numerical analysis, and experimentally confirmed measurements Head/disk contact, degrades reliability, was never detected...

For proper walking, metatarsophalangeal joints play a crucial role during gait. In this study, we specify characteristic features observed in the foot motion signals measured by an in-shoe sensor that are significantly affected first angle (FMTPA). To validate these specified features, conduct classification test for high and low FMTPA subjects using them. Fifty (23 males 27 females) participated our their FMTPAs were digital photography. The with above below 20 degrees categorized as...

This paper presents a method for on-line lithium-ion battery (LiB) internal impedance identification accurate state of health (SOH) and charge (SOC) estimation. The proposed extracts values caused by aging, using optimization linked to an extended Kalman filter (EKF). In long update cycle, elements in equivalent electrical circuit model are optimized during the storage logged measured data identify fixed that relates aging effect. An EKF process runs each iteration calculate multi-objective...

Over-pronated foot and over-supinated are deviations from normal function recognized as risk factors for shin splints, knee pain, etc. Foot has conventionally been assessed by the center of pressure excursion index (CPEI), but measurement systems this complicated expensive. We aim to establish a simpler method assessment using foot-motion measured an in-shoe motion sensor (IMS) system. A total 72 subjects (36 males, 36 females) participated in our study. their CPEIs foot-motions during...

There is a strong need to assess frailty in daily living. Hand grip strength (HGS) has been proven be very important factor for identifying frailty, however it always assessed under the guidance of facility clinicians. Our purpose demonstrate possibility providing HGS estimation by using foot-motion signals measured an in-shoe motion sensor (IMS) embedded insole achieve high precision assessment The were collected from 62 elder participants (27 men and 35 women). Their HGSs hand dynamometer....

This paper describes head/disk interface dynamics for micromachined mother ship negative pressure slider bearings with an integrated microsuspension mechanism that we proposed, at steady-state flying in proximity magnetic recording. The authors first indicated the analytical model air bearing of mechanisms, and advantages mechanisms were discussed from points view, compared conventional head mechanisms. Dynamic design considerations optimization also investigated. Finite element simulation...