PHILS-based characteristic analysis of a power control scheme applied to renewable energy sources

이주한(Ju-Han Lee),김태훈(Tae-Hun Kim),성해진(Hae-Jin Sung),박민원(Minwon Park),유인근(In-Keun Yu),김경훈(Gyeong-Hun Kim) 대한전기학회 2013 대한전기학회 학술대회 논문집 Vol.2013 No.7

연마 방법과 칫솔질이 아크릴릭 레진의 표면 거칠기에 미치는 영향

이주리,정철호,최정한,황재웅,이동환,Lee, Ju-Ri,Jeong, Cheol-Ho,Choi, Jung-Han,Hwang, Jae-Woong,Lee, Dong-Hwan 대한치과보철학회 2010 대한치과보철학회지 Vol.48 No.4

연구 목적: 본 연구는 연마 술식에 따른 polymethyl methacrylate (PMMA)의 표면 거칠기의 차이를 비교하고, 광중합 광택제가 PMMA의 표면 거칠기에 주는 영향과 이후 칫솔질에 의한 거칠기의 변화를 알아보는데 그 목적이 있다. 연구 재료 및 방법: 총 60개의 $10{\times}10{\times}5\;mm$ 크기의PMMA 시편을 만들었다. 중합 방법 (압력 하 중합과 대기압 하 중합)과 표면 연마 방법 (기계적 연마와 화학적 연마)에 따라 대조군을 포함하여 각 10개씩 총 6군으로 나누었다. 기계적 연마는 카바이드 덴처버로 표면 마무리 한 후, 러버 포인트와 퍼미스를 이용하여 하였으며, 화학적 연마는 표면 마무리 후 광중합 광택제 ($Plaquit^{(R)}$; Dreve-Dentamid GMBH)를 도포하여 실시 하였다. 연마가 완료된 후 비 접촉식 3차원적 표면 형상 분석장치인 Accura $2000^{(R)}$으로 표면거칠기를 측정하였으며, 그 3차원적 영상을 얻었다. 그 후 칫솔질에 의한 마모의 영향을 평가하기 위해 초음파 전동 칫솔을 이용하여 각 시편당 칫솔질을 행하고 다시 Accura $2000^{(R)}$에 의한 표면 분석을 시행하였으며, 거칠기의 정도는 Ra 값으로 표시하였다. 연마 후와 칫솔질 후의 표면 거칠기를 비교하기 위한 통계적 분석은 Mann-Whitney test와 t-test를 이용하여 95% 유의수준에서 실시하였다. 결과: 화학적 연마군은 기계적 연마군에 비해 통계적으로 유의한 작은 평균 표면 거칠기 값을 보였으며 (P = .0045), 일반 대기압 하에서 중합시킨 군에서 그 차이가 더 크게 나타났다 (P = .0138). 초음파 전동 칫솔에 의한 모의 칫솔질 후 표면 거칠기는 기계적 연마군을 제외한 모든 군에서 크게 증가하였으며, 칫솔질 후의 표면 거칠기는 각 군에서 통계적으로 유의한 차이를 보이지 않았다. 결론: 비록 칫솔질에 의한 마모의 영향으로 표면 거칠기가 증가하기는 하지만, 화학적 연마가 기계적 연마에 비해 우수한 표면 거칠기를 보인다고 할 수 있다. Purpose: This study evaluated the effect of polishing techniques on surface roughness of polymethyl methacrylate (PMMA), as well as the influence of light-cured surface glaze and subsequent brushing on surface roughness. Materials and methods: A total of 60 PMMA specimens ($10{\times}10{\times}5\;mm$) were made and then divided into 6 groups of 10 each according to the polymerization methods (under pressure or atmosphere) and the surface polishing methods (mechanical or chemical polishing) including 2 control groups. The mechanical polishing was performed with the carbide denture bur, rubber points and then pumice and lathe wheel. The chemical polishing was performed by applying a light-cured surface glaze ($Plaquit^{(R)}$; Dreve-Dentamid GmbH). Accura $2000^{(R)}$, a non-contact, non-destructive, optical 3-dimensional surface analysis system, was used to measure the surface roughness (Ra) and 3-dimensional images were acquired. The surface roughness was again measured after ultrasonic tooth brushing in order to evaluate the influence of brushing on the surface roughness. The statistical analysis was performed with Mann-Whitney test and t-test using a 95% level of confidence. Results: The chemically polished group showed a statistically lower mean surface roughness in comparison to the mechanically polished group (P = .0045) and the specimens polymerized under the atmospheric pressure presented a more significant difference (P = .0138). After brushing, all of the groups, except the mechanically polished group, presented rougher surfaces and showed no statistically significant differences between groups. Conclusion: Although the surface roughness increased after brushing, the chemical polishing technique presented an improved surface condition in comparison to the mechanical polishing technique.

관상동맥질환자의 식이이행과 건강신념, 사회적 지지 및 특성 간 상관관계

이주임 ( Ju Im Lee ),한상숙 ( Sang Sook Han ) 경희대학교 동서간호학연구소 2005 동서간호학연구지 Vol.11 No.1

Purpose: This study was aimed to identify the factors that related the dietary behavior in coronary artery disease patients and to made the data for nursing which is thought to improve the dietary behavior. Method: The study population was the coronary artery disease patients who were treated at outpatient base. The study method was the dietary behavior, diet self-efficacy, perceivedhealthy behavior, social support measurement & characteristics. All of the above tool was validated for its composition proriety and confidence. The statistical analysis was done by SPSS PC 11.0 program. and frequency, percentage, mean, standard deviation, Pearson`s correlation was used for analysis. Results: The score of dietary behavior in the coronary artery disease patients was 4.57 point. The score of perceived-benefits was the highest among the association factor(point) and the score of perceived-barriers(m=2.78), diet self-efficacy(m=5.12), social support(m=4.86 point), exercise and chest pain. Conclusion: The development of the program for the efficient dietary education that prevents the progression of the coronary artery disease is needed.

책이 전한 세계관의 깊이, 게임이 전한 상상력의 확장

이주한,Lee, Ju-Han 대한출판문화협회 2007 출판저널 Vol.375 No.-

위선암에서 Survivin과 KAI-1의 발현에 대한 연구

이주한,김병수,최종상,Lee Ju-Han,Kim Byung-Soo,Choi Jong-Sang 대한위암학회 2003 대한위암학회지 Vol.3 No.1

Purpose: The aim of this study was to investigate the impact of survivin expression and the decrease or loss of KAI-1 on the clinical stage and the survival rate in gastric adenocarcinomas. Materials and Methods: Expressions of survivin and KAI-1 were immunohistochemically determined in 40 cases of gastric adenocarcinomas. The survivin and KAI-1 expressions were also analyzed by using western blots in 14 cases among them. Results: Resected gastric cancer specimens from 40 patients (intestinal type: 15 cases and diffuse type: 25 cases) were evaluated immunohistochemically. Survivin protein expressions were significantly higher in diffuse types (P=0.03) and in advanced clinical stages (UICC TNM II and III, P=0.02). In contrast, a decrease or loss of KAI-1 expression had no statistically significant correlation with the Lauren classification or the clinical stage. Survivin protein positivity was associated with an unfavorable prognosis. Decrease or loss of KAI-1 was associated with a shorter disease free survivial rate (P < 0.01). The western blot data (n=14) indicated that neither survivin protein over-expression nor KAI-1 down-expression had an significant correlation with the Lauren classification or the clinical stage. Conclusion: In gastric carcinomas, survivin over-expression and decrease or loss of KAI-1 were associated with unfavorable prognosis, being independent prognostic factors along with the clinical stage and the disease free survival rate.

개인연구 : 듀이의 습관개념과 교육

이주한 ( Lee Ju Han ) 교육철학회 2003 교육철학연구 Vol.0 No.30

입체적 도시의 속성을 지니는 건축의 바닥에 관한 연구

이주한(Lee Ju-Han),김광현(Kim Kwang-Hyun) 대한건축학회 2008 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.28 No.1(계획계)

This study was started with the question and problem about the modern city. The urban environment is divided into some separated functions; therefore the city is unable to support human life. The characteristics of 3-dimensional city and contemporary architecture with that characteristics are analyzed as a concept with a way to overcome the limit of the modern city. Through this study, it is cleared that the urban floor is an important factor of 3-dimensional city. To make urban floor in architecture is an attempt to get architecture to work with city and that process makes a human environment connecting to the city. After all, making 3-dimensional city is the matter of how to make urban floors naturally.

혀에 발생한 골종 1예

이주한,박일석,Lee, Ju Han,Park, Il Seok 대한두경부종양학회 2018 대한두경부 종양학회지 Vol.34 No.1

Tongue osteoma is a rare disease. Clinically, it occurs mainly in the posterior part of the tongue and may cause foreign body sensation, but most of it is found incidentally without any symptom. Clear mechanisms of development have not yet been established, but many hypotheses have been proposed. Treatment is possible with surgical resection and no recurrence or malignancy has been reported. We experienced a 29 year old man with osteoma of tongue. We report this case with a review of literature.

연구제도의 혁신적 개혁을 통한 청년과학기술인 육성방안 제안

이주한,Lee, Ju-Han 한국진공학회 2018 진공 이야기 Vol.5 No.2

Dewey의 공동체 개념과 교육

이주한(Lee, Ju-Han) 한국교육사상연구회 2007 敎育思想硏究 Vol.21 No.1

본고의 목적은 Dewey 철학에 나타난 공동체 개념을 분석하고 그것이 갖는 교육적 의미를 탐구하는 것이다. 이를 위해 먼저 Dewey의 저작들에 나타난 공동체 개념이 기술적 용법, 찬사적 용법, 규범적 용법으로 사용되고 있음을 밝히고 그 각각의 의미를 검토하였다. 다음으로 공동체의 다양한 용법들 중에서 특히 규범적 용법의 개념이 교육적으로 중요하다고 판단하여, 그것이 갖는 구체적인 의미를 규정하고 그 준거 및 핵심적 요체가 무엇인지를 탐색하였다. 그리고 마지막으로 공동체와 교육이 어떤 연관관계를 갖는지를 공동체 자체의 교육적 기능과 공동체를 위한 학교의 기능으로 나누어 고찰하였다. In chapter Ⅱ, I examined various usages of the word of community in Dewey's philosophy: descriptive, eulogistic and normative usage. In chapterⅢ, I examined the metaphysical, epistemological, psychological ground of Dewey's conception of community. And I clarified that Dewey's conception of community was defined as a group or social life participating in common activities, sharing the aims, meanings and beliefs of the shared activities, and controling or directing their activities in the light of the consequences of the activities. Also I made clear Dewey thought that the elements in criterion whether a group was a ideal and democratic community or not: How numerous and varied are the interests which are consciously shared? And how full and free is the interplay with other forms of association? In chapter Ⅳ, I maintained that community functioned as educational enterprise through communication, school as a representative/typical formal agent of education was framed to influence the mental and moral disposition of their members in Dewey's philosophy. And school has three major functions in relations of wide community which it is located: to provide a 'simplified environment, to provide a 'purified medium of action, to balance the various elements in social environment.