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- 저자 : 허성윤(Sun Yoon-Huh) (검색결과 2 건)
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허성윤(Sun Yoon-Huh),임은미(Eun Mi-Rhim),김선영(Sun Young Kim),박상혁(Sang Hyuk Park) 대한치과의사협회 2011 대한치과의사협회지 Vol.49 No.11
Er: YAG laser irradiation utilizing the newly developed RCLase side-firing spiral tip was used for the cleansing of root canals following their bio-mechanical preparation with ProTaper Ni-Ti files. The distal and palatal roots of 20 freshly extracted molar teeth were instrumented to size F3 with ProTaper files. In the experimental group (10 teeth) the pulp chamber and the root canals were filled with EDTA 17% and the root canals were lased for 30 s using the Er: YAG laser irradiation at 600 mJ per pulse and a frequency of 12 Hz. In the control group (10 teeth) the root canals were not lased. Scanning electron microscope analysis showed clean wall surfaces of the lased root canals with open dentinal tubules, free of smear layer and debris. In the scanning electron microscope photographs of the walls of the non-lased root canals a considerable amount of debris could be detected. It appears that an efficient cleansing of the root canal system can be achieved by using the Er:YAG laser irradiation with the RCLase Side-firing Spiral Tip following bio-mechanical preparation of the root canal with Ni-Ti Taper files.
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국내 원자력발전 부문의 중장기 발전 방향: 계층분석법(AHP)을 중심으로
최현수(Hyun Su Choi),홍선아(Sun-A Hong),허성윤(Sung-Yoon Huh) 한국에너지학회 2024 에너지공학 Vol.33 No.1
Since its introduction in 1978, nuclear power generation in South Korea has consistently expanded its facility capacity and output, making significant contributions to domestic power supply. Developing domestic nuclear technology and securing independent design and construction capabilities, South Korea successfully undertook overseas nuclear power plant construction. However, following the 2011 Fukushima disaster, the nuclear power industry faced setbacks, and globally, the nuclear sector encountered challenges. Despite social controversies surrounding nuclear power, recent events such as the Russia-Ukraine war and rising LNG prices have highlighted energy security concerns, leading to renewed attention on nuclear power. In 2022, with the inauguration of a new government, South Korea has increased investments and support for the nuclear power sector, resuming halted nuclear power plant construction and engaging in various nuclear-related projects. This research aims to analyze the changing domestic and international environment and gather opinions from domestic experts in the nuclear power sector. The goal is to set priorities for the future direction of the nuclear power sector. The primary methodology for analysis involves utilizing the Analytic Hierarchy Process (AHP), with three main criteria and nine sub-criteria set as the hierarchical structure. The analysis results indicate that, at the main criteria level, overseas export of nuclear technology holds the highest weight at 48.7%, indicating its relative importance. At the sub-criteria level, winning contracts for overseas nuclear plant construction projects takes the highest priority at 25.3%. According to this research, the government and nuclear industry should allocate more resources to long-term policies and business strategies for overseas ventures.
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