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여대생의 교양 체육 수업 참여 경험에 관한 문화기술적 사례 연구
박성기,이안수 한국체육교육학회 2023 한국체육교육학회지 Vol.28 No.5
Purpose: of this study takes an in-depth look at female students' experiences of participating in liberal arts tennis classes and seeks to find educational meaning and value. Methods: Participant observation, in-depth interviews, and open-ended questionnaires were conducted on five female students who participated in a liberal arts, physical education, and tennis class. Results: the themes of why female students participated in liberal arts and physical education tennis classes, their experiences while participating in tennis classes, and changes after tennis classes were identified. The discussion revealed that female students had prejudices against liberal arts and physical education, and that they were able to escape from such misunderstandings and prejudices through their experience in liberal arts and physical education classes, and that by re-recognizing the value of liberal arts and physical education, it went beyond its justification as a liberal arts subject and helped college students face the future society. I was able to confirm that it was a necessary subject. Conclusions: It is hoped that the research results will provide practical knowledge to professors who teach university liberal arts physical education classes and will be helpful in research to expand female students' participation in liberal arts physical education.
박성기,심재철,임문환,이원재,장연희,김태우,이창연,오연희,박석건,유문집 대한산부인과학회 1992 Obstetrics & Gynecology Science Vol.35 No.1
저자들은 2년 2개월 된 여아에서 전형적인 Mc-Cune-Ablright 증후군 1례를 경험하였기에 1974년 Cune-Albright 증후군 1례를 경험하였기에 1974년이 등의 보고 이후 새로운 문헌고찰과 함께 보고하는 바이다. The McCune-Albrights syndrome is extremely rare if one considers the complete form which fullfils the triad of cafe au lait spots, fibrous dysplasia, and endocrine disturbances. A current concept about endocrine disturbances in this syndrome is that it is the result of autonomous hyperfunction of peripheral target glands, and that other endocrine disorders (hyperthyroidism, Cushing syndrome, gigantism, and acromegaly)are occasionary accompanied, and that treatment with the aromatase inhibitor testolactone which blocks the synthesis of estogens seems to be successful. The authors report a case of a 22/12-year-old girl with sexual precocity and cafe au lait spots with literature review.
라텍스개질 콘크리트의(LMC)의 강도특성 및 배합인자 결정방법
박성기,원종필,박찬기,Park, Sung-Ki,Won, Jong-Pil,Park, Chan-Gi 한국농공학회 2008 한국농공학회논문집 Vol.50 No.5
This study are decided the mix proportion method of latex modified concrete for agricultural concrete structures from the results of workability and strength test with mix proportion factor. For mix proportion factor, this study are selected the water-cement ratio, unit cement amount and latex content. Also, this study were performed the slump, compressive strength test and microstructure analysis using the scanning electron microscope(SEM). The strength and slump of LMC are dependent with unit cement amount, latex content, and water-cement ratio. Especially, the strength of LMC are not controlled by single mix proportion factor but effected by combined mix proportion factor. Microstructure investigation are showed the LMC are reduced the internal pore volume and enhanced the transition zone between cement paste and aggregate interface. This effect get by consist of latex films in the concrete. Also, this study were recommended the mix proportion method for LMC. These mix proportions method are estimated the mix design for satisfied the target performance which are applied the agricultural concrete structure.
고성능 콘크리트의 재령에 따른 강도 및 내구성능 발현 특성
박성기,오리온,백철우,류득현,이수진,김황희 한국도로학회 2019 한국도로학회논문집 Vol.21 No.3
PURPOSES: The objective of this study is to evaluate the properties of high-performance concrete and compare them with the properties of ternary blended cement (OPC 60% : BFS 30% : FA 10%) as applied to all-in-one bridge decks. High-performance concrete modified with styrene-butadiene latex (SB latex) was evaluated for strength development and durability through its compressive strength and chloride ion diffusion coefficient. METHODS: The compressive strength test was conducted according to KS F 2405, and the average value of the three specimens was used as the result at each stage. The chloride ion diffusion test was performed at 28 days, 56 days, and 365 days according to NT BUILLD 492. The chloride ion penetration test was conducted according to ASTM C 1202. RESULTS: For the compressive strength of the high-performance concrete, the blast furnace slag 40% replacement (BFS40) mixture had the most similar results to those of the ternary blended cement. The BFS40 mixture exhibited a lower compressive strength at 3 days than the latex modified concrete (LMC) mixture used for the bridge deck pavement, whereas it exhibited a 3.7-9.8% higher compressive strength at 7 days. In addition, the BFS40 mixture had the lowest diffusion coefficient, which was 49.1~59.0% lower than that of the LMC mixture. Mixing with latex tended to decrease in charge passed compared to Plain which is only used ternary blended cement, and showed excellent watertighness (rated “very low”), which is lower than 1,000 coulombs in all mixtures with latex. CONCLUSIONS : The BFS40 mixture exhibited excellent compressive strength, chloride ion permeability resistance, and the lowest chloride ion diffusion coefficient although it included a small amount of latex, which makes it more expensive than the current LMC mixture. It is believed that it is possible to secure excellent economic efficiency and durability by using lesser latex than that in the LMC mixture and using a mixture of the blast furnace slag instead.