Papers by Keyword: Human Body

Abstract: Living organisms are open dissipative thermodynamic systems that rely on mechano-thermo-electrochemical interactions to survive. Plant physiological processes allow plants to survive by converting solar radiation into chemical energy, and store that energy in form that can be used. Mammals catabolize food to obtain energy that is used to fuel, build and repair the cellular components. The exergy balance is a combined statement of the first and second laws of thermodynamics. It provides insight into the performance of systems. In this paper, exergy balance equations for both mammal’s and green plants are presented and analyzed.

Abstract: Vibration is a complex mechanical oscillation of solids that can be transmitted directly to the body. By exposing the body to vibration, tissues begin to move from their natural position. In the work setting, there are basically three types of vibration that are medical significant: whole body vibration, segmental vibration and human resonance. When the body comes directly in contact with mechanical vibration, a direct adverse physiological and physical effect occurs on that body. This type of effects interferes with work efficiency and productivity of labor and, in some situations, can put the workers at risk for injury. In ergonomics, any factor that has the potential to impair the worker’s function may be a significant issue and therefore must be eliminated or reduced to the greatest extent possible. In this context, the paper presents an assessment of the effects that vibrations may have on the human body and find ways to prevent or eliminate them. In order to strengthen theoretical information, a case study is presented.

Abstract: In the paper, electric field under overhead lines with human body existing is studied. The mixed method coupling finite element method with charge simulation method is constructed. Linkage of the finite element method domain and the charge simulation method domain is done by use of surface charge at interface. A simplified model with basic figure of human body is used. Calculation results show that human body has distortion effect on electric field nearby. Electric field at region very close to human body is greatly enhanced, while there’s little influence at region far away from the body. Head and upper side of human body play main roles of induction.

Abstract: Vibrations are mechanical oscillations produced by regular or irregular period movements of a member or body about its rest position. Vibration can affect visual perception, muscles, concentration, circulation and the respiratory system and at certain levels can even result in physical harm to the body. The effect of vibration on the human body is related to the natural frequency of parts of the human body affected. This paper studies the dynamic characteristics of a seated human body system in a vibration environment. The main result is a multi degrees of freedom lumped parameter model. The model provided an analytical tool for human body dynamics research. It also enabled a primary tool for seat and cushioning design. Combining the geometry and the mechanical characteristics of a structure under large deformation into a lumped parameter model enables successful analysis of the human/seat interface system and provides practical results for body protection in dynamic environment. The relative displacements of human parts are evaluated, which can be a basis for the assessment of vibration risk. It is suggested that the multi-body dynamic model is used to evaluate the vibration effect to the seated subjects.

Abstract: In this article, the current situation of the study about sportswear structure is analyzed , and summarized the factors that can influent the structure design of sportswear. Than combined with the characteristics of body posture in volleyball game, we found out which point need to adjust, and in different part what requirements need to be met to get the batter structure design. This discussion would provide the reference about structure design of volleyball apparel or other kinds of sportswear.

Abstract: Despite the appearance of high-tech human computer interface (HCI) devices, pattern recognition and gesture recognition with single camera are still playing vital role in research. A real-time human-body based algorithm for hand gesture recognition is proposed in this paper. The basis of our approach is a combination of moving object segmentation process and skin color detector based on human body structure to obtain the moving hands from input images, which is able to deal with the problem of complex background and random noises, and a rotate correction process for better finger detection. With ten fingers detected, more than 1000 gestures can be recognized before concerning motion paths. This paper includes experimental results of five gestures, which can be extended to other conditions. Experiments show that the algorithm can achieve a 99 percent recognition average rate and is suitable for real-time applications.

Abstract: The purpose of this paper is to observe the ergonomic advantages of different car seats and how the driver is constrained to them during the drive. The study was conducted by taking in to consideration the dynamical characteristics of a standard vehicle and subjecting the human body model provided by the AnyBody Modelling System, to inertia and centrifugal forces, in three different driving posture cases. The model proved to be viable and offered an image of different car seats advantages from ergonomic point of view.

Abstract: Vibration problem has been destroying the harmony between human being and nature. In order to analyze the effect of vibration on human body, twenty subjects were exposed to random vibration in fore-and-aft, lateral direction in standing position. The accelerations at head, abdomen and leg of each subject were measured. The response was analyzed by means of acceleration sat the measured points and their Fourier spectra and transfer function. The results show that the response curves of all of the subjects in the same direction are substantially the same. The resonance frequencies decreased in different degree. A principal resonance peak around 0.6Hz at different body parts of the same subject. The research results can provide a reference for human body modeling and human comfort evaluation.

Abstract: This paper describes the various aspects of biological effects of high frequency electromagnetic fields on the human body. Specific Absorption Rate in human model by the IEC62209-1 standard is simulated and evaluated. Also the effect of change in physical parameter on Specific Absorption Rate is simulated and compared by IEC standard model. High Frequency Field Simulation Structure software has been used for simulations.