유경 두개골 전이를 이용한 전두부 성형술

배강익,박운교,이종원 大韓成形外科學會 1993 Archives of Plastic Surgery Vol.20 No.4

수직경사응고(VGF)법에 의한 Si 도핑 GaAs 단결정 성장시 $B_{2}O_{3}$ 첨가에 따른 캐리어 농도 변화

배소익,한창운,Bae, So-Ik,Han, Chang-Woon 한국결정성장학회 2009 韓國結晶成長學會誌 Vol.19 No.2

PBN 도가니를 이용하여 Si이 도핑된 GaAs 단결정을 수직경사 응고법으로 성장시켰다. PBN 도가니에 산화막인 $B_{2}O_{3}$의 양을 $0{\sim}0.2wt%$ 범위에서 변화시키면서, 성장 후 캐리어 농도를 측정하였다. $B_{2}O_{3}$ 첨가량이 증가함에 따라, 초기 0.1 정도의 Si 도판트의 편석계수는 0.01 부근까지 급격히 감소하고, 동시에 캐리어 농도도 감소하는 것을 알 수 있었다. 이는 성장도중 도판트인 Si이 $B_{2}O_{3}$과 반응하며 도너인 Si 양을 감소시키며, 동시에 억셉터인 B 양을 증가시키기 때문으로 보인다. 한편 PBN 도가니 내면에 얇은 유리질의 $B_{2}O_{3}$층 형성이 용이한 고온 산화막 처리가 결함감소에 효과적임을 확인하였다. Si-doped GaAs single crystals were grown by vertical gradient freeze using PBN crucibles. The amount of oxide layer $B_{2}O_{3}$ in PBN crucible was changed($0{\sim}0.2wt%$) and measured the concentration of carriers. The segregation coefficients of Si in GaAs melt decreased rapidly from initial 0.1 to 0.01 as the amount of $B_{2}O_{3}$ increases. At the same time, concentration of carriers was shown to decrease. It is likely that the reaction between dopant Si and $B_{2}O_{3}$ in GaAs melt results in the reduction of Si dopants(donor) while increase in the amount of boron(acceptor). The thin layer of $B_{2}O_{3}$ glass in PBN crucible was proved to be a better way to reduce defect formation rather than the total amount of $B_{2}O_{3}$.

태권도 수련생 학부모의 도장 선택요인에 관한 연구

조운익(Cho, Woon-Ik),박성배(Park, Sung-Bae) 한국웰니스학회 2016 한국웰니스학회지 Vol.11 No.4

본 연구의 목적은 태권도장을 이용하는 수련생들의 학부모들이 태권도장을 선택하는데 영향을 미치는 요인과 수련생들의 만족도 및 재등록 의도를 분석하여 도장 운영을 효율적으로 운영하기 위한 마케팅 전략을 제시하고자 하는 데 있다. 서울시 양천구에 소재한 태권도장 수련생들의 학부모 300명과 자녀들과 함께 국기원에 방문한 학부모 150명 등 총 450명으로부터 설문지를 수집하였다. 통계 분석 결과 다음과 같은 결과를 얻었다. 첫째, 태권도장을 선택함에 있어서, 학부모의 성별, 교육 수준, 수련생의 성별, 태권도 수련 시간, 일주일간 수련일, 시범 공연이 수련생의 동기와, 도장의 서비스, 그리고 수련생 관리에 중요한 영향을 미치는 것으로 나타났고, 수련생의 학년은 수련생의 동기, 도장의 서비스, 그리고 수련생의 관리에 중요한 변수로 나타났다. 둘째, 학부모의 만족도, 교육, 그리고 자녀의 성별은 태권도 사범, 교육 프로그램, 시설 및 도장 위치에 중요한 영향을 미쳤고, 학부모의 성별, 직업, 수입, 자녀의 학년, 수련 시간, 수련 일수는 사범과 교육 프로그램에 유의미한 영향을 끼쳤다. 마지막으로 부모의 교육 수준, 수입, 직업, 시범 공연은 재등록 의도에 중요한 영향을 미쳤고, 자녀의 학년과 수련 시간은 입소문 의지에 중요한 영향을 미쳤다. The purpose of the study was to identify the effects that parents’ characteristics of taekwondo trainee have on taekwondo studio selection, customer satisfaction and re-registration intention and to provide essential marketing strategies for taekwondo studio management and operations. The respondents in the study are parents of taekwondo trainee in yangchengu, seoul and 300 parents were surveyed through the questionnaires. In addition trainees’ parents participated in kukkiwon were surveyed and then 150 questionnaires. The findings in this study indicated as belows. First as for the difference in taekwondo studio selection, gender, education, children’s gender, taekwondo training time by one day, number of training participation by week and training term show significant differences on motive/goal, service, administration and children’s grade show significant differences on the motive/goal, service and trainee management. Second, as for the difference in taekwondo customer satisfaction, education and children’s gender show significant differences on instructor, education program, facilities and studio location and also gender, job, income, children’s grade taekwondo training time by one day, number of training participation by week show significant differences on the instructor, education program. Third, as for the difference in re-registration intention, job, education, income and training term show significant differences on the repurchasing intention and word-of mouth intention and also children’s gender, children’s grade and taekwondo training time by one day show significant differences on word- of-mouth intention.

산재생 공정내 염산 저장시설에 대한 피해 영향범위 분석 및 저감방안에 대한 연구

성기운(Gi Woon Seong),문진영(Jin Young Moon),이익모(Ik Mo Lee),배철호(Chul Ho Bae) 한국위험물학회 2016 한국위험물학회지 Vol.4 No.1

Chemicals are essential for modern society, and more than 15 million kinds of chemicals are commercially used all over the world. Among them, the number of kinds of chemicals circulating in Korea reaches approximately 43,000 or above. It was shown that damage and frequency of occurrence of chemical accidents was at a high level according to an increase in the amount of chemicals used and circulated. According to statistical data provided in Chemistry Safety Clearing-house established by National Institute of Chemical Safety, the number of chemical accidents occurring in Korea for the last 10 years (2005~2014) was found to be 297. Among them, the number of spillage accidents was 230, and accounted for 77%. And with regard to substances which caused accidents, it was shown that accidents most frequently occurred due to hydrochloric acid, being followed by sulfuric acid and nitric acid. This study suggested a scheme of reducing damage and analyzing a threat zone when hydrochloric acid spilled for hydrochloric acid storage facility in acid regeneration process where spent acid was regenerated by using as a key raw material the hydrochloric acid that accounted for a high portion among substances which caused chemical accidents. In order to suggest countermeasures for minimizing damage, threat distance according to spillage accident from hydrochloric acid storage facility was analyzed depending on area of pool by using ALOHA 5.4.5 program. Furthermore, threat distance was analyzed by using KORA-ver1.0.0.12 program before․after hydrochloric acid storage facility was sealed tightly. According to the results of analysis, in case of reducing the area of spilled pool from 80 m2 to 27 m2, the threat zone decreased by 83m from ERPG-2(20 ppm) 213 m to 130 m. And it was possible to verify that the threat zone decreased by 139.9 m from ERPG-2 198.6 m to 58.7 m before·after being sealed tightly. When hydrochloric acid storage facility was sealed tightly, it was shown that the threat distance was minimum. However, it is thought proper to minimize the threat distance by minimizing the area of dike considering safety such as facilities and wall corrosion and suffocation due to hydrochloric acid vapor. It is expected that the results of this study will be utilized for minimizing damage to local residents and protected facilities located within the threat distance in case of spillage accident at hydrochloric acid storage facility.

감껍질, 여주, 작두콩 추출물이 Streptococcus mutans의 우식유발 관련특성에 미치는 영향

김동운 ( Dong-woon Kim ),이동익 ( Dong-ik Lee ),임상욱 ( Sang-uk Im ),최연희 ( Youn-hee Choi ),송근배 ( Keun-bae Song ) 대한예방치과·구강보건학회 2019 大韓口腔保健學會誌 Vol.43 No.3

Objectives: The purpose of this study is to determine methods of dental caries prevention by investigating the use of compounds of Diospyros kaki (D. kaki) peel, Momordica charantia (M. charantia), and Canavalia gladiata (C. gladiata) extracts to limit the cariogenic traits of Streptococcus mutans (S. mutans), such as their ability to proliferate and adhere to the tooth surface. Methods: Broth microdilution and the agar spreading assay were used to determine the antimicrobial effect and minimum inhibitory concentration (MIC) of S. mutans extracts. In order to identify the adhesive ability of S. mutans at varying concentrations, culture plates were first stained with 1 ml of 0.01% crystal violet for 15 minutes at room temperature, and then eluted with 1 ml of EtOH:Acetone (8:2) solution for 15 minutes in a 37℃ incubator. Eluted solutions were then evaluated by use of a spectrophotometer at 575 nm. Results: Experiments were conducted in order to investigate the effectiveness of D. kaki peel, M. charantia, and C. gladiata extracts on limiting the proliferation of S. mutans. The MIC was measured as an indication of whether the antibacterial activity of D. kaki peel, M. charantia, and C. gladiata extracts had a significant bacteriostatic effect on S. mutans. M. charantia extract was effective for growth inhibition on S. mutans at a minimum concentration of 0.25%. From the adhesion ability assay, M. charantia extract had an anti-adhesive effect. Conclusions: These results indicate that M. charantia extract demonstrates antibacterial activity and has an anti-adhesive effect on S. mutans. Due to these properties, M. charantia extract may be used to prevent dental caries.

DNDC 모형을 이용한 논에서 질소와 탄소 거동 평가

조창익 ( Cho Chang-ik ),윤광식 ( Yoon Kwagn-sik ),최우정 ( Choi Woo-jung ),최우영 ( Choi Woo-young ),정재운 ( Jung Jae-woon ),임상선 ( Lim Sang-sun ),이준배 ( Lee Jun-bae ),최훈근 ( Choi Hun-geun ) 한국농공학회 2009 한국농공학회 학술대회초록집 Vol.2009 No.-

이산화탄소와 같은 온실가스 농도 증가에 따른 지구 온난화 문제는 현재 전 지구적으로 가장 큰 현안이다. 농업은 인간 활동에 의해 발생한 CO₂ 배출의 25%를 차지하는 것으로 추정 되고 있다. 토양은 대기 중 CO₂ 배출원이 되기도 하고 저장고가 되기도 한다. 광합성을 통해 식물체에 고정된 CO₂는 식물체 잔재물이 토양으로 환원되면 토양 유기물로 전환되어 유기탄소 형태로 토양에 저장된다. 토양 탄소를 늘리기 위한 장기적 유기물 사용 등은 수질 측면에서는 부정적인 영향을 끼칠 수 있다. 따라서 두 가지 측면을 모두 고려한 관리 방법이 제시 되어야 한다. 지금까지 국내의 농경지의 물질수지연구는 대부분 부영양화를 일으키는 질소와 인의 계량화 및 제어에 초점을 맞추어 왔다. 탄소의 저장고로 토양을 이용하면서 수권으로 유기물질 및 영양물질이 배출 되는것은 최소화 하여야 한다. 다양한 기상과 토양 조건하에서 토양 및 농경관리 예를 들어 경운, 시비, 물 관리, 추수 후 잔류물 관리, 동절기 피복 및 사료 작물재배등이 토양유기탄소 저장에 미치는 영향을 정확히 파악하기 위해서는 DNDC 모형이 많이 이용되고 있다. 국내에서는 외국의 경우처럼 모델링에 의해 관리기술을 연구하는 사례는 매우 미흡하다. 따라서, 농경지 내 질소와 탄소의 거동을 살피고 이들간의 관계를 밝히는 연구가 필요하며 본 연구에서는 DNDC 모델의 국내 적용성을 평가하였다.

다양한 속도의 걷기와 달리기에서 가속도센서의 에너지소비량 추정과 타당성

배윤정(Yoon Jung Bae),이희진(Hee Jin Lee),이운용(Woon Yong Lee),이대택(Dae Taek Lee),조위덕(We Duke Cho),김양원(Yang Weon Kim),허익현(Ik Hyeon Heo),노형석(Hyung Suk Lho) 한국생활환경학회 2012 한국생활환경학회지 Vol.19 No.2

Physical activity provides various physiological and health promotional benefits. In promoting and monitoring physical activity, accelerometers are often employed. But the algorithm installed within the devices has not been throughly examined whether it reflects human activities sensitively. Currently introduced two accelerometers, Actical and Life Sense, were selected and the values obtained from these two devices and indirectly calorimetry (IC) were compared by sex and exercise intensity. Fifty nine young healthy adults (30 men, 28.3±4.2 yrs, 178.3±4.6 ㎝, 79.8± 10.8 ㎏, 25.7±3.5 ㎏·m-²; 29 women, 27.7±5.1 yrs, 161.7±5.0 ㎝, 59.7±6.5 ㎏, 22.8±2.2 ㎏·m-²) participated in the study. They exercised on a treadmill at 6 different speed consecutively such as 3, 5, 7, 9, 10, ㎞·h-¹ for men and 2, 4, 6, 8, 9, 10 ㎞·h-¹ for women. At each speed, they walked or ran for 5 min and rested 1 min before the next speed. During the exercise, they wore LS and Actical on their waistline. Also EE was measured using a metabolic measurement system. EE for men was 4.53±0.79, 6.17±0.96, 11.03±2.16, 14.80±2.25, 15.75±2.11, and 16.86±2.17 ㎉·min-¹ at 3, 5, 7, 9, 10, and 11 ㎞·h-¹ and EE for women was 2.58±0.56, 3.62±0.70, 5.69±1.01, 9.48±1.17, 10.53±1.37, and 11.25± 1.43 ㎉·min-¹ at 2, 4, 6, 8, 9, and 10 ㎞·h-¹, respectively. Except at the lowest speed, EE obtained by three modalities showed high correlations. by sex and treadmill speed. According to Bland-Altman analyses, EE of Actical was consistently low compared to IC regardless sex and speed. Compared to IC, Life Sense showed a proportional error in moderate locomotive speed. Based on the results, Actical underestimated EE compared to IC in both man and woman over the course of treadmill speed. In particular, the two accelerometers do not appear to reflect actual EE sensitivity at low activity level. The sex differences in sensitivity may exist in high exercise intensity.

Poster Display : Therapeutic Efficacy of YCY on CCl4-induced Liver Dysfunction in Rats

( Hee Youl Chai ),( Woon Kwon ),( Young Min Cho ),( Ehn Kyoung Choi ),( Ik Soo Kim ),( Kang Sun Ryu ),( Seock Yeon Hwang ),( Chi Young Yun ),( Yun Bae Kim ),( Jong Koo Kang ) 한국수의병리학회 2003 학술대회 Vol.1 No.-

Therapeutic Efficacy of YCY on CCL₄-induced Liver Dysfunction in Rats.

Hee-Youl Chai,Woon-kwon,Young-min Cho,Ehn-kyoung Choi,Ik-soo Kim,Kang-sun Ryu,Seock-yeon Hwang,Chi-young Yun,Yun-bae Kim,Jong-koo Kang 대한수의학회 2003 대한수의학회 학술대회발표집 Vol.2003 No.-

Eel artificial production in Korea

Shin-Kwon Kim,Bae-Ik Lee,Yong-Woon Ryu 한국수산과학회 양식분과 2021 한국수산과학회 양식분과 학술대회 Vol.2021 No.4