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We present the study of the biomechanical properties of human renal cancer cells utilizing the magneto-optical tweezers. In this work, a novel magneto-optical tweezers were designed by integrating a pair of electromagnets with optical tweezer. The magneto-optical tweezers were utilized to manipulate nano-sized magnetic particles which being uptaken by specific cancer cells. The biomechanical behavior...
Bionic knee was important basic driving element for biped robot. with the adult male's right leg knee working as bionic prototype, the three-dimensional finite element model was established, and the cinnections balance equation was established with the help of nonlinear contact theory, then system penalty function was used to deal with the contact constraint by considering the minimum potential energy...
In this paper a cable-based system is presented for rehabilitation of the wrist movements. The proposed structure consists of one or two cables that allow the movement of abduction-adduction and flexion-extension with different limits of movement and speed. The development of this robotic device is justified by the large number of people with upper limb problems. It starts with a study of the basic...
This paper presents an approach of human gait modeling and prediction using fuzzy inference system. In this system, lower limbs motion prediction is simplified by introducing fuzzy knowledge base to describe the whole motion. Our fuzzy knowledge base predicts contralateral lower limb joints angles. The concept of fuzzy knowledge is based on fuzzy membership function that represents knee angle and...
Investigations of the biomechanical parameters of robotic walker assisted gait are needed to allow modern rehabilitation strategies and to improve further technological developments. In this study, spatio-temporal gait parameters were assessed during normal and assisted ambulation with the Simbiosis walker model, a robotic walker with forearm supports. Six infra-red video cameras, integrated in a...
The finite element models have been used to evaluate the biomechanics of healthy and pathologic knee. And the imaging data provide functional representation of anatomical structures for the models. Previous studies have established the geometry of bone from Computed tomography (CT), and created the cartilage of femoral, tibial according to Magnetic Resonance Imaging (MRI). The meniscus geometric structure...
The main purpose of this work is to present a three dimensional biomechanical multibody foot model suitable to perform forward dynamic analysis. The proposed approach takes into accounts the different contact phenomena that develop between the foot and ground during the stance phase of the human gait. The interaction between the foot and ground bodies is provided by the introduction of a set of spheres...
The purpose of this study is to validate a computational model that can be applied to studies of movement control and rehabilitation. A two joint, six muscle, virtual arm (VA) model has been developed in previous work [Song et al. 2008a]. The VA model driven by internal noise of neural control of muscles, i.e. the signal dependent noise (SDN), displays a behavior of kinematic variability that is often...
Vertical displacement of the body center of mass (BCOM) reflects the motion of the whole body and it can be used as a relevant indicator in studying and evaluation of human walking. In this work, a methodology to accurately compute vertical displacement of the BCOM in real-time using smart mobile phone equipped with accelerometer sensor has been proposed. The proposed methodology is experimentally...
Accumulation of bone micro-damage is suspected to lead to severe impairment of mechanical properties with an increase in skeletal fragility and fracture risk. The objective of the study was to evaluate the potential of Nonlinear Resonant Ultrasound Spectroscopy (NRUS) for measuring micro-damage accumulation in cortical bone using four-point bending cycling fatigue. Sixteen human cortical bone specimens...
Focus on the study of a simplest biped robot, the dynamics of the biped locomotion is analyzed. In order to avoid swinging leg scrape the ground as it attempts to swing in front of the support leg, in this paper, a more complicated biped robot that has knees is designed. The knee of the swinging leg is bended during the swing phase, so the swinging leg is shorten. The robot is powered by using an...
In order to provide natural, biomimetic control to recently developed powered ankle prostheses, we must characterize the impedance of the ankle during ambulation tasks. To this end, a platform robot was developed that can apply an angular perturbation to the ankle during ambulation and simultaneously acquire ground reaction force data. In this study, we detail the design of the platform robot and...
This abstract presents new results on the structure and function of vestibular part of the inner ear of vertebrates with special emphasis on human behavior. First we summarize a mathematical analysis of motion of the endolymphatic fluid, justifying known approximated formulas for the cupula functioning based on a set of anatomical parameters. Some of these parameters can be estimated from the bony...
Though simple in appearance, postural stabilization is a complex neuromuscular task requiring coordination among multiple joints. Mechanisms of postural stability and control in the body include supraspinal processes responsible for anticipatory postural adjustments (APA) and internal model control, lower level motor servo, and passive viscoelasticity of the musculo-tendon complex (MTC). Nevertheless,...
A robot-driven gait orthosis which allows balance training during gait would further enhance the capabilities of robotic treadmill training in gait rehabilitation. In this paper, additional mass is attached to walking able-bodied subjects to simulate the effects of additional inertia and body weight support on the lateral balance task. The combination of additional inertia and body weight support...
The transmissibility and the phase shift of the foot and ankle system (FAS) under the vertical sinusoidal vibration were studied as a function of the applied load. It was found that the increase of the applied load leads to the increase of the observed resonant frequency and stiffness of the system case.
Introduction: Advanced Normalization Tools (ANTs) is an image registration program that has been validated for analysis of several tissues, but not previously applied to the disc. The objectives of this study were to optimize ANTs for disc image registration and to validate ANTs strain measurements by comparison with Vic2D, a commercially available software previously applied to quantify disc strain,...
A wearable device was developed to study the human grasping behavior. This device includes a custom-made glove with conductors at finger tips to detect the finger contact signals, a simple electronic circuit to enhance the signal quality, and a real-time data acquisition system to synchronize the acquisition of the finger contact signals with obtaining the optical marker signals in a motion capture...
Non-enzymatic glycation (NEG) detrimentally affects cancellous bone's mechanical integrity. In particular, it may help explain the fragility of osteoporotic bone, which is composed primarily of thinner and more rod-like trabeculae. Hence, the goal of our project was to investigate the relationship between the extent of NEG and trabecular morphology. Individual trabeculae were extracted from mechanically...
In this paper, we propose a novel interface called Joyman, designed for immersive locomotion in virtual environments. Whereas many previous interfaces preserve or stimulate the users proprioception, the Joyman aims at preserving equilibrioception in order to improve the feeling of immersion during virtual locomotion tasks. The proposed interface is based on the metaphor of a human-scale joystick....
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