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Nowadays, decreasing birthrate and aging population become to be the serious social problem in Japan. Therefore, needs of assistive devices are more and more increasing. When people use such assistive devices, there is a risk that devices cost user excessive burden. So analysis and evaluation of motions and load of person who uses assistive devices are necessary. In this paper, a model to analyze...
In this paper, we propose a novel fatigue assessment technique using Vertical Ground Reaction Force (VGRF) signals acquired during ultra-marathon running. To achieve that goal, we performed frequency-domain on singlechannel VGRF signals on different time intervals during ultra-marathon running and tracked the features' variation. Our method was applied on single-channel VGRF signals recorded via instrumented...
In this paper, we propose guidelines and techniques for optimally handling Vertical Ground Reaction Force (VGRF) signals acquired during running. For that endeavor, we developed an algorithm that performs leg-specific signal separation in an adaptive manner such that each VGRF signal is decomposed into two equally-sized time series each being specific to one of the two legs. Our technique was applied...
A virtual reality program has been developed to assess the strength and flexibility of a computer based model of a term fetus or newborn baby's neck. The software has a haptic/force feedback user interface which allows clinical experts to adjust the mechanical properties, including range of motion and mechanical stiffness of a newborn neck model, at runtime. The developed software was assessed by...
Robotic prosthetic foot-ankle prostheses typically aim to replace the lost joint with revolute joints aimed at replicating normal joint biomechanics. In this paper, a previously developed robotic ankle prosthesis with active alignment is evaluated. It uses a four-bar mechanism to inject positive power into the gait cycle while altering the kinematics of the ankle joint and pylon segment to reduce...
We developed an cardiopulmonary resuscitation (CPR) feedback learning device using maltisensor technology such as the Kinect and Wii Balance Board, in order to improve and promote lay rescuers' knowledge and skills in CPR. The proposed system can evaluate user CPR actions in real time and a low-cost way. Particular characteristics of this system are for laypeople to achieve the necessary posture during...
As fingers represent the main executive instrument that assisted human evolution by performing various activities, starting with work and fight for survival, the flawless functioning of their grip and motion capacity should be a major preoccupation for researchers in biomechanics and ergonomics areas. More and more robotics becomes involved in rehabilitation issues requiring accurate information regarding...
Main purpose of this paper is to describe a propose and compile a dynamometric measurement system which would measure the isometric force of a handgrip. Although, in the practice, there have already been the mechanic hand dynamometers which could evaluate only a limited amount of information, precisely the maximum strength of a handgrip, our aim is to compile the full electronic hand dynamometer....
Lower-limb musculoskeletal injuries are a pervasive problem in the population and military, especially during basic training where load bearing bones and joints are repeatedly subjected to aggressive movements and high forces. The ability to measure these elements is critical to acquisition decisions affecting or influencing cumulative load carriage of the individual Marine/Warfighter. These data...
Biomechanical properties have been revealed as potential biomarkers for distinguishing cancer cells from normal cells. In this work, we report a novel technique using a confining microchannel embedded with microelectrodes for biomechanical phenotyping for floating human cells, including one normal breast cell line (MCF-10A) and two breast cancer cell lines (MCF-7 and MDA-MB-231). The floating cells...
It was found that the material properties of the human spleen were not strain rate dependent within the tested range. This finding can lead to simplified models with elastic material properties that can quickly determine the effect of loading on the spleen including prediction of failure.
Electromyography (EMG) employs widespread usage of rehabilitation robotics. EMG informs about the maximum capabilities of muscles and allows comparisons between different tasks performed. This presents a comparitive study % MVC (Maximum Voluntary Contraction) hand muscles among 30 to 60 years of age group. The movement considered are flexion and extension of elbow and wrist, pronation and supination...
Center of pressure (COP) movement during sitting on an unstable chair can be used to represent static trunk postural control. Theoretically, healthy individuals with intact trunk proprioception should have similar COP movement between eye-open and eye-closed conditions regardless of visual feedback. The custom software program has been developed to investigate COP movement in this group of participants...
After shooting action, basketball's movementtrajectory directly affects the shooting rate. In this paper, usingtheoretical basis of kinematic mechanics, analyzes the influenceof rotation of basketball on air resistance, and draws aconclusion that the influence of contra rotation on shooting ratediffers from that of forward-rotation. In the end, The papersuggestions that the strength of shooting should...
Center of pressure (COP) movement during sitting on an unstable chair can be used to represent static trunk postural control. Theoretically, healthy individuals with intact trunk proprioception should have similar COP movement between eye-open and eye-closed conditions regardless of visual feedback. The custom software program has been developed to investigate COP movement in this group of participants...
Hand muscles do not perform their functions because of different reasons such as disease, injury and trauma. It is implemented some treatments for the hand therapy at hospitals and rehabilitation centers. One of these is using orthotic or robotic devices for rehabilitation. One of the important issues for these devices, placed on the user's hand, is force transmitting. Design and manufacturing process...
The lower limb exoskeleton can help the paralyzed walk again, also can be used to reduce the body weight. it is necessary to promote the anthropomorphic and man-machine matching of exoskeleton. The man-machine matching is divided into two, one is the structure matching and the other is the driven matching involving the biomechanics of the muscle. This article puts forward the design rule of exoskeleton...
Radial distal fracture is commonly found in clinical practice. Compared to surgical treatment, the traditional manual reduction is proved effective and has high efficiency-cost ratio. However, the lack of basic research on biomechanical measurements and analysis of manipulative reduction at home and abroad makes the effect of traditional manual reduction not so satisfying. This paper proposed a novel...
An anti-ejection control strategy was proposed for the characteristics of underactuated prosthetic hand grasping process. The reference position can be calculated and the stiffness of objects can be estimated by the feedback signals of force and position. When the driving joint approaches the reference position and the actual grasp force does not reach the desired value, which means that the ejection...
This paper built an improved vascular model based on mass spring model, considering forces associated with springs elongation and bending. Meanwhile, for the improve of real-time computation, few nodes are used to build vascular model. In order to ensure vascular model is similar with biomechanics properties of real vascular, using Gaussian Processes to optimize parameters of model. Parameter set...
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