• Journal of the Korean Society of Safety
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• v.24 no.2
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• pp.13-16
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• 2009

A ski lifter for winter sports is one of the necessary and familiar facilities. But recently safety concern about ski lifter has been built. The ski lifter crash in Pocheon happened recently showed an example of safety concern and frigidity for safety awareness. In this report, the cause of the ski lifter crash in Pocheon was reviewed, and some suggestions were made to prevent a similar accident base on this review.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.40 no.3
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• pp.193-200
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• 2012

A numerical analysis is carried out in order to obtain aerodynamic data of the ski jump. The body modelling of Korean people is used in the numerical simulation and the result is validated by comparing it with the wind tunnel experiment. A flying posture, which provides the maximum lift-to-drag ratio, is found by analyzing the aerodynamic coefficients of various flight conditions. The result of the present study can be applied to fixing the postures of Korean ski players and is expected to advance the national sports science.

• Journal of the Korea Society of Computer and Information
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• v.16 no.11
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• pp.137-143
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• 2011

In this paper, we implement the ski jump visualization tool using the OpenGL graphics library. Among the evaluation elements of jump, the distance of jump is most important. Also, the distance of jump depends on Lift-to-Drag Ratio. In the previous studies, the visualization too according to the consequential changing of variety factors is insufficient. This study provides an easy style flying posture visualization tool to the user who using Lift-to-Drag Ratio. Furthermore, there is to implement an international standard jumping hill by virtue of entered five main data. The results of this study can be applied with reference data for better ski jump.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.33 no.1
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• pp.59-70
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• 2010

This paper reorganized five service qualities dimensions of ski-resorts, then derived the improvement priority order of the service quality through a satisfaction measure considering the importance. There're more competitive situations to guarantee customers using the skies and snowboards is a major sports in winter season. In these competitive environments, this paper's going to propose a predominant-competitive strategies for improving the service quality of ski-resorts. This study measured the satisfaction considering the importance of service quality target on customers has an experience ski resort service quality to improve ski resort service quality. This study using Performance Model decide a priority order about a particular item improvement, then is going to present a guideline that can improve the service quality more exactly. As a result of the study the factors that is important to the customer were prime physical factor, access, assistance physical factor, staff service and assistant service, an improvement priority order were accommodation and eating-drinking facilities, waiting time of a slope and lift/gondola, entertainment/shopping facilities in the resorts, equipment rental and lift fare.

• Proceedings of the Korean Society of Computer Information Conference
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• 2011.06a
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• pp.183-184
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• 2011

본 논문에서는 양항비를 이용하여 스키점프 시각화 도구를 구현하였다. 스키점프는 점프대에서 도약시의 가속도와 맞바람을 통한 양력을 이용하여 활공하는 스포츠이다. 다양한 영향 요소 중에서도 점프의 거리가 가장 중요한데 이는 받음각에 따른 양력과 항력의 비인 양항비에 의해 결정된다. 기존 연구에서 최적의 양항비를 계산하여 이미 표준적인 받음각과 스키의 벌림각, 구부린 각 등은 잘 알려져 있다. 그러나 이러한 영향 인자의 변화에 따른 시각화 도구는 미흡한 실정이다. 본 논문에서는 양항비를 이용하여 사용자에게 직관적인 자세 시각화 도구를 제공한다. 구현을 위하여 OpenGL을 이용하여 그래픽을 표현하고 기존의 수학적 모델을 이용하여 사용자가 요구하는 인자의 변화에 따른 자세변화를 보인다. 본 논문의 결과물은 더 나은 스키점프을 위한 참고자료로 활용될 수 있을 것이다.

• Journal of computational fluids engineering
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• v.21 no.3
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• pp.71-76
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• 2016

In speed skiing, aerodynamic forces play an important role in determining performance of the skier. To predict aerodynamic effects of the posture of the skier on alpine downhill skiing, we constructed equation of motion of the skier and performed the corresponding CFD simulations. Comparing drag and lift of three different skier postures, it has been shown that drag decreases significantly by tucking upper body to lower body and stretching arms forward. Also, aerodynamic lift which worked as downforce in standing posture worked upward in tuck posture, reducing friction force between snow and ski. This indicates that tuck posture have advantages over standing posture in dual mechanism, namely by reducing drag and also increasing lift. By this two-dimensional initial study we could reveal the general tendency of the aerodynamic force over the skier's body. This study not only provides a theoretical foundation for the athletes to understand the aerodynamic effects of skier postures but also shed a light on towards more accurate and rational three-dimensional CFD simulation of skiers in the near future study.