• Proceedings of the ESK Conference
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• 대한인간공학회 1998년도 춘계학술대회논문집
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• pp.149-154
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• 1998

The design of seat is maintaining to final stable posture. The final stable posture is the seated posture in which the force of the pad and spring supporting the body is balanced with the body weight and the bodydoes not sink anyfurther intothe seat. With poorly designed seated seats, your behind maygradually move forward, or localized pressure may result in congestion of the blood or numbness, making you want to move. Therefore, the final stable posture is not maintained. A number of ideas were used in this study will eliminate this problem. In automobile seat design, primary attention has forcused on providing the occupant with a comfortable seat that has sufficient padding and adjuxtments toaccomodate different sizes and postures of people. First of all, whether the process is design-oriented or technology-oriented, the design concept must be human-oriented. The fatigue-alleviating seats which were the primary purpose of this research were studied with a human-oriented approach.

• Journal of the Institute of Electronics Engineers of Korea SP
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• 제41권3호
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• pp.121-127
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• 2004

This paper presents a new vertex selection scheme for shape approximation. In the proposed method, final vertex points are determined by "two-step procedure". In the first step, initial vertices are simply selected on the contour, which constitute a subset of the original contour, using conventional methods such as an iterated refinement method (IRM) or a progressive vertex selection (PVS) method In the second step, a vertex adjustment Process is incorporated to generate final vertices which are no more confined to the contour and optimal in the view of the given distortion measure. For the optimality of the final vertices, the dynamic programming (DP)-based solution for the adjustment of vertices is proposed. There are two main contributions of this work First, we show that DP can be successfully applied to vertex adjustment. Second, by using DP, the global optimality in the vertex selection can be achieved without iterative processes. Experimental results are presented to show the superiority of our method over the traditional methods.

• Nuclear Engineering and Technology
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• 제52권9호
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• pp.2100-2106
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• 2020

This paper newly proposes an efficient analytic springback prediction method to predict the final dimensions of bent cylindrical tubes for a helical tube steam generator in a small modular reactor. Three-dimensional bending procedure is treated as a two-dimensional in-plane bending procedure by integrating the Euler beam theory. To enhance the accuracy of the springback prediction, mathematical representations of flow stress and elastic modulus for unloading are systematically integrated into the analytic prediction model. This technique not only precisely predicts the final dimensions of the bent helical tube after a springback, but also effectively predicts the various target radii. Numerical validations were performed for five different radii of helical tube bending by comparing the final radius after a springback.

• Transactions of Materials Processing
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• 제8권1호
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• pp.108-115
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• 1999

In this paper, the analysis of cold forging in final state has been performed by using rigid-plastic FEM. For the analysis, the geometry and flow stress of the workpiece are required. One method to obtain the geometry is measurement of that made from experimet. To evaluate the flow stress, average effective strain is calculated from the load-stroke diagram by using energy method. The numerical test performed to show the validity of propose method. The analysis of PFIR, the precision forging of spurgear with inside relif, is performed.

• Transactions of Materials Processing
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• 제4권1호
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• pp.59-69
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• 1995

A simple kinematically admissible velocity field is proposed to determine the final-stage extrusion load and the average extruded length in the square-die forward extrusion of regular polygonal-shaped bars from circular billets. From the proposed velocity field, the upper-bound extrusion load and the average extruded length are determined by minimizing the total power consumption with respect to four parameters. Experiments have been carried out with hard solder billets at room temperature. The theoretical predictions of the extrusion load are in good agreements with the experimental results and there is generally reason able agreement in average extruded length between theory and experiment.

• 한국방재학회:학술대회논문집
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• 한국방재학회 2007년도 정기총회 및 학술발표대회
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• pp.181-185
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• 2007

A free-surface correction(FSC) method is presented to solve the 3-D shallow water equations. Using the mode splitting process, FSC method can simulate shallow water flows under the hydrostatic assumption. For the hydrostatic pressure calculation, the momentum equations are firstly discretized using a semi-implicit scheme over the vertical direction leading to the tri-diagonal matrix systems. A semi-implicit scheme has been adopted to reduce the numerical instability caused by relatively small vertical length scale compare to horizontal one. and, as the free surface correction step the final horizontal velocity fields are corrected after the final surface elevations are obtained. Finally, the vertical final velocity fields can be calculated from the continuity equation. The numerical model is applied to the calculation of the simulation of flow fields in a rectangular open channel with the tidal influence. The comparisons with the analytical solutions show overall good agreements between the numerical results and analytical solutions.

• Journal of Acupuncture Research
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• 제29권4호
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• pp.1-6
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• 2012

Objectives : This study was done for reporting the effect of scratching method on patients with positional vertigo. Methods : We investigated 22 cases of patients with dizziness, and devided patients into two groups : We treated one group by complex oriental medical treatment with scratching method therapy, and did the other group by complex oriental medical treatment without scratching method therapy. Korean version of dizziness handicap inventory at baseline and final were used for evaluating the effect of the treatment. Results : 1. In scratching method group and non-scratching method group, compared with baseline, at final, Korean version of dizziness handicap inventory was significantly decreased. 2. At final, scratching method group showed significant decrease on Korean version of dizziness handicap inventory compared with non-scratching method group. Conclusions : Scratching method showed significant improvement in dizziness.

• Journal of Acupuncture Research
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• 제24권3호
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• pp.1-8
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• 2007

Objectives : This study was to evaluate the influence of dysgeusia on prognosis of peripheral facial paralysis. Methods: We investigated 40 cases of patients with Peripheral Facial Paralysis, and classified them as existence of dysgeusia. we evaluated the treatment effect of each group by using Gross Grading System of House-Brackmann, Yanagihara's Unweighed Grading System before treatment and after final treatment. Results: 1. Postauricular pain showed the highest frequency in symptoms at onset. 2. As a result of evaluation by using Gross Grading System of House-Brackmann, Yanagihara's Unweighed Grading System, treatment score after final treatment was marked higher than that before treatment within each group. 3. After final treatment, non-dysgeusia group showed signficant difference on Gross Grading System of House-Brackmann, Yanagihara's Unweighed Grading System compared with dysgeusia group. Conclusions: These results suggested that non-dysgeusia group should be get better than dysgeusia group in the patient with peripheral facial paralysis.

• Journal of Acupuncture Research
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• 제28권4호
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• pp.119-125
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• 2011

Objectives : This study was to investigate the effectiveness of cupping therapy on peripheral facial paralysis. Methods : We investigated 39 cases of patients with peripheral facial paralysis, and devided patients into two groups : We treated one group by complex oriental medical treatment with cupping therapy, and did the other group by complex oriental medical treatment without cupping therapy. To evaluate the effectiveness of treatment applied for two groups, we used gross grading system of House-Brackmann(HB score), Yanagihara's unweighed grading system(Y score) at baseline and final. Results : 1. In cupping group and non-cupping group, compared with baseline, at final, HB score was significantly decreased and Y score was significantly increased. 2. At final, cupping group showed significant decrease on HB score and significant increase on Y score compared with non-cupping group. Conclusions : Cupping therapy can be available for relieving symptoms related with peripheral facial paralysis.

• Journal of Biosystems Engineering
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• 제26권3호
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• pp.229-236
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• 2001

The torque loads acting on the input shaft of the transmission and final driving shaft of the tractor having a cage wheel attached to the driving tries as a traction aid were measured during the rotavating operations in a poorly drained paddy field. Using the measured load data load spectra were constructed. Effects of the design parameters of the cage wheel on the load characteristics were also analyzed. The torque load exerted on the input shaft decreased as the diameter of the cage wheel increased and increased as the rotavator speed increased. The torque load exerted on the final driving shaft increased as the working speed of the tractor increased and decreased as the rotavator speed increased. The torque load on the final driving shaft with the cage wheel were greater than those without the cage wheel.