• Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT)
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• v.10 no.2
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• pp.105-115
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• 2012

Necessity of demonstration test to evaluate the structural integrity of a basket for accident conditions arose during license approval procedure for the WSPP's dry storage facility named MACSTOR/KN-400. A drop test facility for demonstration was constructed in KAERI site and demonstration tests for basket drop were conducted. As the upper welding region of a loaded basket was collided with a dropped basket during the drop test, the welding in this region was fractured and leakage happened after the drop test. The enhancement of basket design was needed since the existing basket design was not able to satisfy the performance requirement. The directions for design modification were determined and six enhanced designs were derived based on these directions. Structural analyses and specimen tests for each enhanced design were conducted. By evaluating structural analysis results and test results, one among six enhanced designs was decided as a final design for revision. The final design was the one to reduce the height of central post of a basket and to decrease the impact velocity with a dropped basket. Test basket models were fabricated with accordance with the final enhanced design. Additional demonstration test was performed for this test model and all the performance requirements were satisfied.

• Journal of the Korea Institute of Construction Safety
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• v.3 no.1
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• pp.18-24
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• 2020

The purpose of this study is to propose a system improvement plan to prevent ground sinking accidents. To do this, follow the procedure below. First, it defines terms that are used interchangeably, such as ground subsidence and ground depression. Second, analysis of the current status and cause of ground sink, and the analysis of the correlation between rainfall and ground sink causes, derives priority management causes. Third, we propose a system improvement plan for the cause of priority management. As a result, damage to underground pipes and inadequate underground works were identified as the cause of priority management, and two system improvement plans to manage them were proposed. The results of this study can be used as basic data for improving the system for more effective prevention of underground sink in the future.

• Journal of Korean Society of Transportation
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• v.21 no.5
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• pp.73-81
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• 2003

The Government presented improvement plans such as "Traffic Accident Frequent Point" and "Hazardous Roads" to reduce traffic accidents on the increase after 1980s. In case of the hazardous roads, they are expressed by grades which are marked by geometric elements such as width, radius, grade. sight distance. and other environmental factors. As each business for improving roads goes by only focusing on improvement of geometric elements, excessive expense can be invested too much nowadays causing economical waste. Therefore, as improvement plans approached by economic access are needed, this paper shows the cost-effective improvement of the business to keep safety related to traffic accident and economical waste. The hazardous roads which authorized by Gwang-ju National Road Preservation Office of Construction and Transportation Ministry in 1995 for business for improvement of roads, were investigated before 1999. First of all, estimating traffic accident models are presented by using existed data statistically. The models help to maximize traffic accident decrease through control of the presented factor. Secondly, optimum construction cost of improvement is presented to prevent overcapitalization. However, this paper is limited because it was difficult to sort the data with various areas and to approach various ways.

• Proceedings of the Korean Society of Disaster Information Conference
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• 2016.11a
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• pp.292-294
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• 2016

'16년 9월 경주지역 지진 발생으로 현재까지 여진이 계속 이어지고 있으며 우리나라 국토도 지진 또는 각종 자연재해, 재난으로부터 안전한 곳이 아니라는 인식을 심어주게 되었다. 본 연구에서는 사람들이 많이 이용하는 다중이용시설의 재난 발생 시 상당한 인적, 물적 피해를 우려하고 있으며 피해를 예방하고 최소화 할 수 있는 현재 방재설비를 확인하고 유지관리 개선안에 대해서 알아보고자 한다.

• Proceedings of the Korea Contents Association Conference
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• 2012.05a
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• pp.389-390
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• 2012

대학생이 학업중단에 이르는 과정은 여러 가지 요인에 의해 영향을 받는다. 이에 관한 연구는 초기에 학업중단을 예방할 수 있게 해주며, 각 단계에서의 다양한 개입의 방향과 전략을 제시해 줄 수 있다. 따라서, 본 논문에서는 학업을 포기하는 전문대학생의 실태와 현황, 학업중단의 문제를 요인 분석하기 위하여, K대학의 중도탈락에 관한 실제 데이터를 대상으로 요인분석을 실시하고, 그 개선안을 제시하데 그 목적이 있다.

• Annual Conference of KIPS
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• 2004.11a
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• pp.369-372
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• 2004

게임산업은 IT 산업 중에 다른 산업과의 연계를 통해 큰 부가가치를 창출하고 있는 산업이다. 게임제작 프로세스 개선안에 관한 연구를 통해 전체적이고 체계적인 게임 제작 단계를 제시하였으며, 각 활동을 진행하기 위한 제작 부서를 할당하여 작업자간 원활한 의사소통과 일정 진행으로 인한 작업효율의 증대를 기대할 수 있다.

• Journal of Auto-vehicle Safety Association
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• v.4 no.1
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• pp.23-26
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• 2012

본 논문은 듀얼클러치 변속기 변속 메커니즘 개발을 위한 동역학적 시뮬레이션 해석 및 피로수명 해석에 관한 연구이다. 캠을 이용한 쉬프트 포크의 이송으로 기어를 변속하는 개념을 갖는 쉬프트 메커니즘의 작동성 및 설계안 검증을 위해 캠의 회전 속도, 접촉면의 경계조건 및 싱크로나이저 슬리브에서의 저항을 반영한 모델링을 구성하여 동역학적 시뮬레이션을 실시하였다. 각 파트의 응력 및 변형률 발생을 해석하여 설계 개선안을 도출하고, 개선안이 반영된 최종 시작모델의 시뮬레이션 상 최대 응력 발생 시점에서 시프트 포크의 각 접촉면 별 외력 작용을 분석하여 이를 적용한 피로 해석을 진행하였다.

• 대학교육
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• s.21
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• pp.34-43
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• 1986

• 대학교육
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• s.15
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• pp.62-67
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• 1985

• 대학교육
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• s.23
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• pp.68-75
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• 1986