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Cellular mechanics is a hot field of biological mechanics and biological engineering. The development of the Nano-indentation technique provides a new way for examining the nano-mechanical characteristics of the yeast cells. The nano-indentation properties and the ultra-structure of yeast cells were examined by using the Tribo Indenter in nano-mechanical test Instrument. The largest indentation depth...
Monitoring and guiding real time body motion permits corrective measures to be implemented for more effective rehabilitation results. Taking the rehabilitation practice at home can help stroke patients with movement disability to regain the motor skill. Existing systems for rehabilitation is either too costly, or complicated and bulky to be efficiently employed for personal use at home. In this current...
Human motion capture technologies are widely used in interactive game and learning, animation, film special effects, health-care and navigation. Because of the agility, upper limb motion estimation is the most difficult in human motion capture. Traditional methods always assume that the movements of upper arm and forearm are independent and estimate their movements separately; therefore, the estimated...
Replication of human body motion is a very important means to maintain a subject's emotion, knowledge and experience. The replication process requires accurate motion capturing system with sensor technologies to measure postures of human bodies and posture transmission, as well as feedback systems to adjust postures to fit into targeted ones. The sensing and feedback technologies are fundamental building...
Human motion coordination is a long-standing research issue in biomechanics, and it should also have some implications for humanoid robot control.We have built a whole-body somatosensory reflex model based on our neuromusculoskeletal model and identified its parameters through non-invasive measurements and statistical analysis. Such models are crucial for analyzing and estimating signals in the nervous...
This paper discusses the preliminary design and development of an online anomalous behaviour and event detection system. Live video feeds from CCTV camera were obtained and processed. Important biomechanics features were then extracted and analyzed to discriminate and determine the dynamic objects in the current video scene. Human and nonhuman dynamic objects were then stored in the temporal memory...
Up to now, mostly blunt human-robot impacts were investigated in the robotics literature. In this context, the influence of robot mass and velocity during rigid impacts with and without the possibility of the human being clamped was quantified. In this paper an analysis of soft-tissue injuries caused by sharp tools, which are mounted on/grasped by a robot is carried out as the next step down the road...
Epilepsy is caused by sudden flurries of electrochemical activity in the brain, which interrupt the 'conversation' among neurons. Consciousness, memory, sense, speech, mood, movement, and motions can all be affected during the one or two minutes that the seizure lasts. Walking, jogging, running and stationary bicycling are particularly safe, but especially "Prayer type yoga exercise" clearly...
In this study, it is aimed at measuring for the first time the isometric force of human gracilis (G) muscle as a function of joint angle, intraoperatively. Experiments were conducted during anterior cruciate ligament reconstruction surgery. The knee angle was fixed at 120°, 90°, 60°, 30° and 0° respectively and active isometric forces of this muscle were measured using a buckle force transducer. Limited...
In this study, the adequency of the current amplitudes during intraoperative force measurement of human gracilis muscle is investigated. During anterior cruciate ligament (ACL) reconstruction, gracilis muscle isometric force is measured after stimulating the muscle by different current amplitudes (130, 140, 150 and 160 mA) at fixed knee angles 90°, 60° and 30°. When the knee angle is fixed at 60°...
In the united states, traumatic brain injury (TBI) is the most common cause of death in vehicular crash. Biomechanical analysis of brain tissue is necessary because the experiment cost too much and the modeling achieved the mechanical simulation in vehicular crash. In order to obtain the mechanical properties of human brain tissue, in last 35 years, people did compression, shear, and oscillatory loading...
The high density of receptors in fingertip skin is a limiting factor for replicating tactile feedback for neural prosthetics. At present, the large size of engineered sensors and the dense network of neural connections from finger to brain inhibit duplicating the approximately 100 receptors/cm2. The objective of this work is to build a model of the skin and neural response with which populations of...
CD151 plays an important role in the regulation of cell migration, vascular morphogenesis, and cancer metastasis. Many of these processes are related to the strength of cell-matrix attachment. In this study, traction force microscopy (TFM) was used to determine whether knockdown of CD151 in endothelial cells would lead to a significant modification in cell-matrix adhesion. Human dermal microvascular...
The saliva in dry mouth subjects worked as well as that of the controls in providing lubricity. Their interaction with the saliva substitutes was similar to the behavior of that of the controls with the substitute. Based on the statistical analysis, it is likely that saliva in dry mouth subjects differs from that in normal healthy individuals in quantity alone and not quality.
Electromechanical Wave Imaging (EWI) has recently been introduced as a non-invasive, ultrasound-based imaging modality, which could map the electrical activation of the heart in various echocardiographic planes in mice, dogs and humans in vivo. By acquiring radio-frequency (RF) frames at very high frame rates (390-520Hz), the onset of small, localized, transient deformations resulting from the electrical...
The present work investigated the behavior of conduction velocity of muscle fiber action potential of the vastus lateralis muscle through the acquisition of surface electromyographic signals during the knee isokinetic extension movement. Nine healthy male subjects performed three sets of ten maximal concentric knee extensions at 60o/s with a rest interval of one minute between the sets. The linear...
Free of most social constraints, elderly people tend to perform activities of daily living following the same sequence. This paper proposes a method for medical telesurveillance to detect and quantify a nycthemeral shift in this daily routine. While this common phenomenon is mostly mild, in acute cases, however, it may reveal a pathological behavior requiring a rapid medical examination. This method...
Determining the stiffness (or compliance) of biological vascular vessels is of importance when investigating pathological conditions, the design of stents, vascular grafts, distal anastomotic connectors in coronary artery bypass surgery, and understanding of biological pressure sensors. This communication is concerned with determining appropriate values of the material constants associated with a...
The functional behaviors of human standing postural control investigated when they were exposed to the long-term horizontal vibration in the sagittal plane. For complexity of human postural control, a useful alternative method which has been based on a black-box approach was taken, that is, where the feedback mechanism were lumped into a single element. The motor-driven support platform was designed...
Mechanical impedance is a complex number and a system's property. Impedance of human arm is the control variable when the central nervous system coordinates a motion. This research proposes a new method for measuring the mechanical impedance as a complex number. Impedance is measured at the hand point while sinusoidal perturbation is applied. That helps extracting the real and imaginary part of the...
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