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혼화재료의 치환에 따른 경량기포 콘크리트의 기초적 특성분석
최성용,신재경,정광복,한민철,한천구,Choi, Sung-Yong,Shin, Jae-Kyung,Jeong, Kwang-Bok,Han, Min-Cheol,Han, Cheon-Goo 한국건축시공학회 2007 한국건축시공학회지 Vol.7 No.2
This study investigated the fundamental properties of the lightweight foamed concrete depending on various admixtures, and the results were summarized as following. When 20% of cement kiln dust(CKD) and 0.002% of stabilizing agent were mixed to lightweight foamed concrete, it was necessary to use a superplasticizer because flowability was decreased. However, it could reduce sinking depth which were the extensive trouble of lightweight foamed concrete. Bulk density was divided into '0.4' and '0.5' grades on KS according to unit volume weight. The compressive strength was less than that of plain concrete when admixtures were applied, but the results exceeded the minimum strength of the each grades on KS. Totally, it is found that the combination of 20% of CKD and 0.002% of stabilizing agent makes it possible to reduce a sinking depth, recycle resources, and save cost when were mixed.
부산시내 지하생활권의 공기오염도와 온열인자에 관한 조사연구
최성용,문덕환,이종태,송인혁,이채언,이승민,Choi, Sung-Yong,Moon, Deog-Hwan,Lee, Jong-Tae,Song, In-Hyuk,Lee, Cha-Eun,Lee, Sung-Min 대한예방의학회 1994 Journal of Preventive Medicine and Public Health Vol.27 No.3
For the purpose of preparing the fundamental data on air pollution in underground shopping center and also contributing to the health improvement of residents, the authors measured the level of $SO_2,\;NO_2,\;TSP,\;CO,\;CO_2$ and also some related factors as air temperature, air movement, relative humidity and mean radiation temperature at inside and outside of underground shopping center in Pusan from January to February and from July to August 1994. The results were as follows : 1. The mean concentration of CO within the underground shopping center was $3.1{\pm}1.3ppm$ in winter and $2.1{\pm}0.9ppm$ in summer. There was a negative correlation (p<0.01) between inner CO concentration and temperature in summer and no correlation between inner CO concentration and outer CO concentration in underground shopping center 2. The mean concentration of COE within the underground shopping center was $876{\pm}353ppm$ in winter and $757{\pm}125ppm$ in summer. There was a negative correlation (p<0.01) between inner $CO_2$ concentration and air movement in summer and positive correlation (p<0.05) between inner $CO_2$ concentration and outer $CO_2$ concentration in underground shopping center. 3. The mean concentration of $SO_2$ within a underground shopping center was $0.036{\pm}0.019ppm$ in winter and $0.040{\pm}0.013ppm$ in summer. There was a positive correlation(p<0.01) between inner $SO_2$ concentration and temperature in summer and positive correlation between inner $SO_2$ concentration and outer $SO_2$ concentration in summer and winter in underground shopping center. 4. The mean concentration of $NO_2$ within a underground shopping center was $0.052{\pm}0.038ppm$ in winter and $0.042{\pm}0.016ppm$ in summer. There was a no correlation between inner $SO_2$ concentration and thermal factors in summer and winter and low correlation between inner $SO_2$ concentration and outer $SO_2$ concentration in underground shopping center 5. The mean concentration of TSP within a underground shopping center was $430{\pm}214{\mu}g/m^3$ in winter, $366{\pm}73{\mu}g/m^3$ in summer, and very in excess of the atmospheric environmental quality standards of Korea ($150{\mu}g/m3{\downarrow}$). There was low correlation between inner TSP concentration and temperature in summer and high correlation between inner TSP concentration and outer TSP concentration in underground shopping center.
한방의료기관에서 치료하는 환자의 의료이용분석 -외래 및 재원입원환자의 성, 연령, 지역별 분석을 중심으로-
최성용,신현규,박해모,이선동,Choi, Sung-Yong,Shin, Hyun-Kyu,Park, Hae-Mo,Lee, Sun-Dong 대한예방한의학회 2012 대한예방한의학회지 Vol.16 No.2
Objective : This study aimed to analyze the utilization of Korean Medicine clinics, and high-frequent diseases by sex, age, and region of outpatients and inpatients Methods : The data for this study were "Report on Usage Patterns of Korean Medicine Clinics" issued by the Ministry of Health and Welfare in 2008. Descriptive analysis and correspondence analysis were used to find the patterns of patient's utilization by sex, age and region Results : Diagnosis and examination methods mostly consisted of the pulse for diagnosis. Treatment methods consisted of acupuncture, medical herbs in package, and insurance extract powder. Fee for consultation was paid by Korean Medicine insurance. Usage increased when people's age was over 20 and climaxed among people who were in their 40s and 50s and decreased gradually afterwards. Also, there were differences between the sexes. There were differences in high-frequent diseases by regions, and in usage of Korean Medicine clinics according to sex and age. Conclusion : It was found that there were differences in usage and patterns of Korean Medicine Clinics according to sex, age, and region.
대전광역시 고등학교 물리교육의 현황 및 물리교육 방향 제안
최성용 ( Seong-yong Choi ) 전북대학교 과학교육연구소 2018 과학과 과학교육 논문지 Vol.43 No.2
2015 개정교육과정이 2018년부터 전국 중, 고등하교에서 시행되면서, 대부분의 고등학교에서 학생들의 물리 과목 선택 비율은 더욱 낮아지고 있다. 그러나 대전광역시에 위치한 대덕고등학교는 대전광역시교육청에서 과학중점학교 과정을 운영하는 학교로서 학생들의 물리과목 선택 비율과 물리과목에 대한 흥미와 성취도가 매우 높다. 대덕고등학교는 물리 수업뿐만 아니라 물리실험 교육과정을 통하여 학생들이 물리를 충분히 이해할 수 있는 기회를 제공하고 있다. 대덕고등학교의 물리교육 과정을 일반계 고등학교에도 적용하여 보다 많은 학생들이 물리뿐만 아니라 화학, 생물 및 지구과학 과목을 수강하게 하는 것이 학생들의 미래를 위하여 필요하다. ther reduced after the 2015 amendment education course was enforced since 2018. However, students at Deadeok High School in Daejeon choose physics classes with a high ratio, compared to students at other high schools. Since Daedeok High School runs a special program of science priority school, high interest and achievement of physics courses of students are kept. The physics education program including classes and experiments of physics at Daedeok High School provides sufficient opportunity of understanding of physics concepts to students. It is necessary for students at general high schools in Korea to study a similar science education program including physics, chemistry, biology, and earth science of the Daedeok High School for students future.