The relationship between radiological features and clinical manifestation and dental expenses of keratocystic odontogenic tumor

민정현,허경회,허민석,최순철,이원진,이삼선,배광학,최진우 대한영상치의학회 2013 Imaging Science in Dentistry Vol.43 No.2

Purpose: This study was performed to identify correlations between keratocystic odontogenic tumor (KCOT) data from CT sections, and data on the KCOT clinical manifestation and resulting dental expenses. Materials and Methods: Following local Institutional Review Board (IRB) approval, a seven-years of retrospective study was performed regarding patients with KCOTs treated at the Seoul National University Dental Hospital. A total of 180 KCOT were included in this study. The following information was collected: age, gender, location and size of the lesion, radiological features, surgical treatment provided and dental expenses. Results: There was no significant association between the size of the KCOT and age, gender, and presenting preoperative symptoms. In both jaws, it was unusual to find KCOTs under 10 mm. The correlation between the number of teeth removed and the size of the KCOT in the tooth bearing area was statistically significant in the mandible, whereas in the maxilla, no significant relationship was found. Dental expenses compared with the size of the KCOT were found to be significant in both jaws. Conclusion: The size of KCOT was associated with a significant increase in dental expenses for both jaws and the number of teeth removed from the mandible. These findings emphasize the importance of routine examinations and early detection of lesions, which in turn helps preserving anatomical structures and reducing dental expenses.

기존온수온돌과 조립식 온수온돌의 전열특성에 관한 실험적 연구

민정현,이충구,장문석,Min, J.H.,Lee, C.G.,Jang, M.S. 대한설비공학회 1995 설비공학 논문집 Vol.7 No.4

The objectives of this study are to find out and to analyze the heat transmission characteristics of the conventional and prefabricated Ondol systems. To compare the thermal characteristics of these Ondol, a real sized Ondol model is set in a chamber. Hot water whose temperature is varied from $45^{\circ}C$ to $60^{\circ}C$ with $5^{\circ}C$ interval is supplied to each Ondol system. At that time the temperature distribution of floor surface, the amount of supplied heat, the heat radiation aspect and the heat loss from the floor to the underground are measured and analyzed simultaneously. As a result, even if the supplied hot water temperature to the prefabricated Ondol panel is lower by about $5^{\circ}C$ than that of the conventional Ondol panel, the net radiant effect is same. Heat radiation efficiency of the prefabricated Ondol panel is over 5% better than that of the conventional Ondol panel. It takes 12 hours for the conventional Ondol and 45 minutes for the prefabricated Ondol, respectively to reach steady state.

유아교사의 디지털 테크놀로지 지식, 기술, 태도와 디지털 매체 활용 간의 관계

민정현,신동주 한국어린이미디어학회 2023 어린이미디어연구 Vol.22 No.1

The purpose of this study is to examine the general trends of early childhood teachers’ digital technology knowledge, skill, attitude and digital media utilization, and to investigate the relationship between digital technology knowledge, skill, attitude and digital media utilization. In this study, teachers overseeing classes of 3, 4, and 5-year-old children in preschools and daycare centers were selected as the research subjects. A questionnaire was used to find out the relationship between digital technology knowledge, skill, attitude, and digital media utilization of early childhood teachers. The research results derived from the analysis were as follows: First, the result indicated strong general trends of digital technology in the order of skill, knowledge, and attitude. In the case of digital media utilization, the smartphone and search program showed the highest frequency. Second, as a result of examining the differences in digital technology knowledge, skill, and attitude according to the background variables of early childhood teachers, female teachers, teachers under the age of 30, and teachers with experience in digital-related training showed higher results. In the case of digital media utilization, teachers with higher age in charge and with experience in digital-related training experience used digital media more frequently. Third, there was an overall significant positive correlation between early childhood teachers’ digital technology knowledge, skill, attitude and digital media utilization. The results of this study are significant in identifying the characteristics of early childhood teachers’ digital technology knowledge, skill, attitude and providing basic data for the utilization of digital media in early childhood education. 본 연구의 목적은 유아교사의 디지털 테크놀로지 지식, 기술, 태도와 디지털 매체 활용에 대한 일반적인 경향과 배경변인에 따른 차이를 알아보고, 디지털 테크놀로지 지식, 기술, 태도와 디지털 매체의 활용 간의 관계를 알아보는 것이다. 이를 위해 유치원과 어린이집에 근무하고 있는 만 3, 4, 5세 유아반 담임교사 255명을 대상으로 설문조사를 실시하였다. 주요 결과는 다음과 같다. 첫째, 유아교사는 디지털 테크놀로지와 관련하여 기술, 지식, 태도 순으로 높은 점수를 나타냈으며, 디지털 매체 활용의 경우 하드웨어는 스마트폰을 가장 많이 활용하였고 소프트웨어의 경우 전반적으로 제작 프로그램을 가장 많이 활용하고 있었다. 둘째, 유아교사의 배경변인에 따른 디지털 테크놀로지 지식, 기술, 태도의 차이를 살펴본 결과 성별에서는 여성이, 연령에서는 30대 미만이, 디지털 관련 연수 경험 여부에서는 연수 경험이 있는 교사의 디지털 테크놀로지에 대한 지식, 기술, 태도가 높게 나타났다. 디지털 매체 활용의 경우 담당 연령이 높고 디지털 관련 연수 경험이 있는 교사일수록 디지털 매체를 더 자주 활용하는 것으로 나타났다. 셋째, 유아교사의 디지털 테크놀로지 지식, 기술, 태도와 디지털 매체 활용 간의 관계를 분석한 결과 전반적으로 유의한 정적 상관관계가 있는 것으로 나타났다. 본 연구결과는 유아교사의 디지털 테크놀로지 지식, 기술, 태도의 특성을 밝히고 유아교육 현장에서의 디지털 매체 활용에 대한 기초자료를 제공하는데 의의가 있다.

[음악교육 칼럼] 우리에겐 기다림이 없다

민정현 충북연구원 2009 앞,뒤 바라보다 Vol.- No.1

HIV-1 nucleocapsid 단백질 저해제 합성

민정현,박정호 한국공업화학회 2005 한국공업화학회 연구논문 초록집 Vol.2005 No.-

에이징-인-플레이스(Aging-in-place)를 고려한 영구임대주택 단지 외부 커뮤니티 시설 구성의 특성 분석

민정현,이현수 한국실내디자인학회 2022 한국실내디자인학회논문집 Vol.31 No.6

It is predicted that Korea will enter a super-aged society by 2025, with the proportion of the elderly population reaching 20.3%. Older people want to continue living in the area where they live. Therefore, it is important to consider the neighborhood in the permanent rental housing where the elderly who are very low income group primarily live. In particular, community facilities play an important role in increasing the living satisfaction of older people in rental housing. The purpose of this study is to investigate the distribution of community facilities in the neighborhood in order to propose efficient community facilities. In this paper, GIS is used to investigate the number and distance of community facilities around permanent rental housing. Based on the results of the GIS analysis, the distribution of community facilities in the neighborhood of rental housing is evaluated. The results show that the distance to community facilities should be shortened, especially for the elderly. In addition, since the distribution of current community facilities is not diverse and is concentrated only in certain facilities. There is a need to provide diverse community facilities. In particular, there are very few cultural and leisure facilities and medical social welfare facilities. In addition, the southeast area has the longest distance from permanent rental housing to community facilities, and the northeast area has the closest distance to community facilities.

공동주택의 난방실태에 따른 온돌의 전열특성 연구

민정현,송인춘,장문석,유헌형 忠南大學校 産業技術硏究所 1996 산업기술연구논문집 Vol.11 No.1

The objectives of the study are to find out the thermal performance of Ondol and its heat transmission characteristics through the experiment between the conventional Ondol system and prefabricated Ondol system in apartments. The results of the study could be summarized as follows. ·The heat radiation efficiency of prefabricated Ondol is better than that of conventional Ondol. ·The prevailing intermittent heating system of existing apartments must be changed to the continous heating system to keep the living space comfort. ·The allocation of boiler matching with the real heating load and some developed system taking into account of partial efficiency are needed to obtain the best performance of boiler. ·It is worth changing the existing finishing materials of conventional Ondol to any other materials having good thermal sensation. ·It is to be desired that the intermittent heating system of existing apartments should be changed to the continous heating system. And in case of holding the intermittent heating system the running time of boiler must be enlarged.

광섬유 격자 센서를 이용한 FRP 보강 철근콘크리트 보의 접착파괴 모니터링

민정현(Jung- Hyun Min),신영수(Yeong-Soo Shin),김기수(Ki-Soo Kim),김종우(Jong-Woo Kim),조윤범(Yoon-Bum, Jho) 한국콘크리트학회 2002 한국콘크리트학회 학술대회 논문집 Vol.2002 No.11

카바메이트 촉매 열분해를 통한 이소시아네이트 제조에서의 CuO-ZnO의 상호 작용

현민정,서영웅 한국공업화학회 2014 한국공업화학회 연구논문 초록집 Vol.2014 No.1

Non-phosgene 공정 중 하나인 카바메이트의 열분해를 이용한 이소시아네이트의 생산 반응이 주목을 받고 있다. 선행 연구를 통해 카바메이트의 촉매 열분해 반응에 있어서 ZnO 촉매의 활성이 매우 우수함을 확인하였다. 이에 ZnO 촉매의 활성을 보다 개선하기 위해 CuO-ZnO 이원 금속 산화물을 제조하였다. 그 결과, ZnO 촉매의 활성 증진보다는 CuO와 ZnO 간의 상호작용에 대한 효과를 확인하였다. 본 연구에서 사용하는 반응물은 Dimethyl hexane-1,6-diyldicarbamate (HDC)이고 반응 실험은 초자 반응기를 사용하여 질소분위기 하에 448 K에서 수행하였다. CuO-ZnO 촉매는 공침법을 이용하여 합성하였으며, 이 때 CuO-ZnO 몰 비를 변화시켰다. 최종적으로 촉매 활성과 물성 간의 연관관계를 조사하여, CuO-ZnO 촉매의 시너지 효과에 대한 원인을 해석하였다.

공간적 범위에 따라 분류한 노인주거의 국내학술지 연구동향

민정현(Min, JeongHyeon),이현수(Lee, HyunSoo) 한국실내디자인학회 2021 한국실내디자인학회 학술대회논문집 Vol.23 No.3