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The stretching, that is, the distance between the centre of mass of the ssDNA and the antibody, has been studied using the potential of mean force calculations based on molecular dynamics and the explicit water model. Our simulations indicate that the 6 residues Gln43, Gly44, Arg98, Tyr100, Val136 and Thr137, pair interactions of antibody-ssDNA, and the 5 interprotein molecular hydrogen bonds might...
Lamarck formed the hypothesis Inheritance of acquired characteristics, which states that offspring inherit characters acquired by their parents. However, this hypothesis has now been rejected in the field of genetics. Baldwin offered an explanation for observations of inheritance of acquired characters, despite the fact that they are not inherited; an idea referred to as the Baldwin effect. To verify...
In the present study, a biomimetic swimmer, which propels itself by mimicking the helical flagella motion of microorganisms, is developed. The free swimming model propelled by a helical tail with a pitch angle of 30°, 45° and 60° respectively is tested in a silicone oil bath at a Reynolds number around 0.17. Its propulsive velocity, induced angular velocity and propulsive thrust are measured in the...
During radiotherapy of lung tumors, the respiratory motion must be tracked to reduce radiation of healthy tissue. This is usually done by using a respiratory surrogate, but with limited accuracy. We investigate how patient-specific finite element models (FEM) of respiratory mechanics can predict the motion of the lungs. First, the anatomical models of the lungs and thorax are extracted from CT images...
We propose a method to detect abnormal crowd behavior using integrated multiple behavior models. Traditional abnormal detection methods are based only on personal behavior models. However, a single behavior model cannot accurately reflect complex crowd behavior. To solve this problem, we introduce an integrated multiple behavior model for accurate abnormal behavior detection in a complex crowd scene...
Though interest in gait biometrics continues to increase, there have as yet been few approaches which use model-based algorithms with temporal 3D data. In this paper we describe a new 3D model-based approach using a marionette and mass-spring model to gait biometrics with 3D voxel gait dataset. To model the articulated human body, we use a stick-figure which emulates the marionettes' motion and joint...
Modeling and control of swimming untethered microrobots are important for future therapeutic medical applications. Bio-inspired propulsion methods emerge as realistic substitutes for hydrodynamic thrust generation in micro realm. Accurate modeling, power supply, and propulsion-means directly affect microrobot motility and maneuverability. In this work, motility of bacteria-like untethered helical...
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...
Low back pain affects approximately 80% of the population at some point of their life, and lumbar degenerative disc disease is often indicated as the cause of that symptom. The mail goal of this work is to develop a biomechanical lumbar spine model, using multibody systems methodologies, useful for dynamic analysis, such as in the biomechanical behavior of pathologic and non-pathologic situations...
Prevalence of LBP has led researchers to find out biomechanics of lumbar spine in conjunction with the surrounding muscles and the role of intra-abdominal pressure in different activities. Despite substantial number of experimental studies in this field, limitations of in-vivo experiments have guided researchers to utilize mathematical modeling to obtain more information regarding the spine biomechanics...
This paper presents an improved 3D dynamic model based on mode shape functions for biomimetic continuum robotic arms intended for underwater operation. It is an extension to the dynamic model proposed in the author's previous work to incorporate angular moments and hydrodynamic forces such as buoyancy, lift, and drag. The proposed model is based on an accurate kinematic model and gives an enhanced...
The study on the liver deformation during the needle inserted into the target lesion, plays an important role in the robot-assisted liver tumor coagulation therapy system, which impacts the operation simulation, the pre-operative surgical planning, the treatment accuracy, and the success rate. To this end, this paper presents a quasi-static finite element method to analyze the deformation of the soft...
This paper presents a path planning algorithm for robotic assisted stitching. The method uses a nonlinear model for curved needle — soft tissue interaction. The proposed method can be used for autonomous robotic suturing. The performance of the algorithm was assessed through simulations and experiments. The experimental results illustrate that the path planned curved needle insertions are fifty percent...
This paper introduces ‘Ground Following Locomotion’ as a means to traverse rough terrain inspired by pill bugs(Armadillidium vulgare). The locomotion of pill bugs is unique and effective on irregular terrain. Pill bugs bend their bodies actively along with the terrain to maintain traction force and the behavior enables them to overcome irregular terrain easily. This biological principle can be applied...
A framework to adjust sitting postures based on musculoskeletal models is presented in this paper. After the analysis of muscles and strength, some âcomfortableâ postures are specified as candidate postures. An optimization algorithm is then applied to choose from these candidates, according to current conditions of muscles and the durations one needs, and form a sequence of ordered postures for...
Collision detection has been one of the major performance bottlenecks in clothing animation. Currently the mostly used approach uses the bounding volume hierarchy (BVH). In order to further accelerate the collision detection speed, this paper proposes a new coherent hierarchical collision detection method. This method takes advantage of the fact that in a clothing animation system, the clothing is...
Vehicle accelerations may feed through the human body, causing involuntary limb motions which may lead to involuntary control inputs. This phenomenon is called biodynamic feedthrough (BDFT). Signal cancellation is a possible way of mitigating biodynamic feedthrough. It makes use of a BDFT model to estimate the involuntary control inputs. The BDFT effects are removed by subtracting the modeled estimate...
Various factors have contributed to China's rapid economic growth, such as capital accumulation, technological progress, structural change, resource optimization, system and institutional innovation. But the rapid growth is motivated by other reasons as well, for example, the demographic factor. This paper contributes to the domain by analyzing and studying the relationship between labor force and...
In motorization field, the mechatronic actuators are widely used. They are especially employed to control the air flow circulating in the diesel engine such that the motor performance is ameliorated (improving its efficiency with decreasing the GHG emissions). As a rule, the industrialists do not have an exact analytical models for this actuators class. They often use the lookup table techniques to...
In the paper, takes high college and university in Jiangxi province as an example, based on the survey in the targeted high college and university and systematic analysis on the high college and university actual situation, with the help of the literature review, research methodology and analytical framework of the competitiveness, the paper established the eight influencing factors that acted on...
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