• 대한소아치과학회지
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• 제26권1호
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• pp.126-132
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• 1999

저자는 전남대학병원 소아치과에 내원한 혼합치열기 II급 부정교합환아를 Activator와 Anterior high pull headgear로 치료하여 다음과 같은 결론을 얻었다. 1. 상악골의 전, 하방 성장을 억제하였다. 2. 하악골의 전방 전위 및 반시계방향 회전을 유도하였다. 3. Deep overbite와 large overjet이 개선되었다.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2004년도 춘계학술대회 논문집 방전 플라즈마 유기절연재료 초전도 자성체연구회
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• pp.120-124
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• 2004

The protection performance and energy absorption capability are important for both MOAs for distribution lines and MOAs for high voltage systems, therefore the manufacturing technique of ZnO varistor elements with high ability against surge impacts is great important for high voltage systems. But until now ZnO varistors for low voltage class have been developed in Korea, ZnO varistors with the rate discharge current of 5, 10kA class for high voltage systems depend on an import from advanced countries, such as Japan or U.S.A, which have developed its in the late 1980s. So in the aspect of taking independent technique the development of ZnO varistors with the rate discharge current of 5, 10kA class for high voltage systems is important. In this research project ZnO varistor elements with diameters of 35mm and 70mm for the rate discharge current of 5, 10kA class for high voltage systems are manufactured, then various chemical composition and processing variables affected the electrical and the physical characteristics of these ZnO varistors are investigated.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2022년도 추계학술대회
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• pp.404-406
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• 2022

본 연구에서는 일반계 고등학교의 고교학점제를 위하여 데이터과학 수업 방안을 설계하였다. 초·중학교나 일반계 고등학교에서는 시수 확보가 쉽지 않아서, 데이터과학과 같은 새로운 과목을 학습자가 마음껏 수강할 수 없지만, 고교학점제를 통하여 원하는 과목을 신청하여 학습을 진행할 수 있다. 이에 A시의 일반계 고등학교에서 데이터과학을 신청한 15명의 학생을 위하여 ADDIE 모형에 기반하여 수업 방안을 설계하였다. 본 연구를 통하여 학습 방안에 따른 데이터과학 수업 과정을 설계할 수 있었다.

• 한국농촌건축학회논문집
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• 제13권4호
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• pp.25-34
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• 2011

On former days, school has realized as "where teach", but development of a technology and change of paradigm are changing school as "where study". This is meaning that student is more important and be considered than others when make school environment. Due to continuous investment of national level in several decades, in our elementary school's facilities and environment, when compare with advanced nations that we know that have come to the fairly high level. But, it is not really certainly in middle school and high school. Than the reason is, 'College entrance examination' is prior than other certain values in occasion of high school especially, and we ask a question in return whether have persuaded ourselves that school facilities and environment may change later. It is hard to find more important thing than the proposition in fact on present society. However, it is that society and facilities that can correspond to fast change of paradigm, change of curriculum, learner's change and environment have to be changed in middle school and high school now. Departmentalized Class System that applies in national middle and high school now can become an opportunity that can improve school facilities and environment of middle and high school. In such background, I studied space satisfaction and student's moving route and pattern characteristic of Departmentalized Class System high school in Chungcheongbuk-do area. And this study aims at supply the data about efficient Departmentalized Class System School's facilities plan and space use which can meet on request of students.

• 한국산학기술학회논문지
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• 제16권4호
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• pp.2924-2932
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• 2015

본 연구는 초등학교, 중학교 및 고등학교의 급수설비 사용수량의 분석 통해 급수량 산출자료를 추정하여 학교시설 급수시스템의 적정 급수계획에 필요한 기초자료를 얻고자 하였다. 이를 위하여, 강원지역 6개 도시에 소재하는 초 중 고등학교 54개 학교를 대상으로 5년간의 급수설비 사용수량을 분석하였다, 분석결과, 1) 월평균 사용수량의 평균은 $600.7(m^3/mon)$이었으며, 초등학교와 중학교가 $484.2(m^3/mon)$, 고등학교가 $833.8(m^3/mon)$로 분석 되었다. 2) 학급당 월평균 사용수량의 평균은 $27.0(m^3/mon/class)$이었으며, 초등학교와 중학교가 $24.4(m^3/mon/class)$, 고등학교가 $32.(m^3/mon/class)$로 분석 되었다. 3) 1인1일 평균 사용수량의 평균은 55.8(l/c/d)이었으며, 초등학교와 중학교가 54.4(l/c/d), 고등학교가 58.6(l/c/d)로 분석 되었다.

• 한국대기환경학회지
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• 제22권6호
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• pp.808-820
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• 2006

In regard to indoor air quality patterns, the government introduced various polices that were about managing and monitoring quality of indoor air as a major assignment, and also executed 'Indoor Air Quality Management Act' which was presented in the May, 2004. However, among the multi-usage facilities controlled by the Act, the school was not included yet. This study goal was to investigate PM 10 pollution patterns of the high school classrooms using a pattern recognition method based on cluster analysis and disjoint principal component analysis, and further to survey levels of inorganic elements in May, June, and September, 2004. A hierarchical clustering method was examined to obtain possible objects in pseudo homogeneous sample classes by transformation raw data and by applying various distance. Following the analysis, the disjoint principal component analysis was used to define homogeneous sample class after deleting outliers. Then three homogeneous Patterns were obtained as follows: the first class had been separated and objects in the class were considered to be sampled under semi-open condition. This class had high concentration of Ca, Fe, Mg, K, Al, and Na which are related with a soil and a chalk compounds. The second class was obtained in which objects were sampled while working air-conditioners and was identified low concentration of PM 10 and elements. Objects in the last class were assigned during rainy day. A chalk, soil element and various types of anthropogenic sources including combustions and industrial influenced the third class. This methodology was thought to be helpful enough to classify indoor air quality patterns and indoor environmental categories when controlling an indoor air quality.

• 대한치과교정학회지
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• 제24권3호
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• pp.555-567
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• 1994

The purpose of this study is to observe the effect of high pull headgear on the craniofacial structures of mixed dentition with Class II malocclusion. The cephalometric headplates of 16 children treated by high pull headgeaar during 6 months and 18 children during 12 months were traced, digitized and statistically analyzed. The results were as follows. 1. Inhibition of foreward growth of maxilla was observed in both group. 2. Clockwise rotation of maxilla was observed in both group. 3. There were distal movement of maxillary 1st molar and inhibition of alveolar bone growth of maxilla. 4. There was compensatory extrusion on mandibular 1st molar. 5. The ratio of anterior facial height to posterior facial height was almostly not changed. In the treatment plan of C II malocclusion by high pull headgear, ire must prevent the mandibulasr 1st molar from extruding and for orthopedic effect, at least 6 months is needed.

• 한국항행학회논문지
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• 제24권2호
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• pp.107-114
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• 2020

2.4 GHz ISM대역 전력증폭기를 설계하고 송신 시스템을 구현하였다. 고효율 증폭기는 E급이나 F급 증폭기로 구현 가능하다. 본 연구에서는 회로 구조가 간단한 E급으로 20 W 급 고효율 증폭기를 설계하여 ISM 대역 응용에 적용하도록 하였다. E급 회로 설계이론 및 회로 시뮬레이션을 통해 임피던스 정합회로를 설계하였으며 2.45 GHz에서 출력전력 44.2 dBm 및 전력부가효율 69%를 얻었다. 설계된 전력증폭기에 30 dBm의 입력전력을 인가하기 위하여 앞단에 전압제어발진기와 구동증폭기를 제작하여 입력전력 공급회로를 구현하였고, 제작한 전력증폭기는 43.2 dBm 출력 및 65%의 전력부가효율 특성을 나타내었다. 본 연구결과는 무선전력전송, 전파차단장치, 고출력 송신장치 등 다양한 무선통신시스템용 출력 전력증폭기 설계에 활용될 수 있다.

• 한국정보통신학회논문지
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• 제16권9호
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• pp.1906-1914
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• 2012

본 논문은 우회경로를 적용하는 JET 스위칭 방식의 광 버스트 스위치 네트워크에서 클래스간 비율적 서비스 차별화 방안을 제안한다. 제안하는 방식은 동적파장할당, 선취권, 그리고 우회경로 방식을 적용한다. 동적파장할당은 주기적인 측정을 통해 클래스간 손실 비율의 조정이 요구되는 경우에 높은 클래스에 할당된 파장의 수를 동적으로 증가시킴으로서 높은 클래스의 손실률도 낮추면서 동시에 상대적 손실 비율도 유지한다. 가용한 파장이 모두 사용된 경우에는 낮은 클래스의 트래픽이 사용하던 파장을 높은 클래스의 트래픽에 이양하는 선취권 방식을 적용한다. 동시에 우회경로를 적용하여 높은 클래스나 낮은 클래스의 손실률을 낮춘다. 제안된 방식에 대한 큐잉 기반의 분석 모델이 도출되고, 도출된 모델을 기반으로 성능분석을 수행하여 제안모델이 비율적 서비스 차별화를 제공함을 입증한다.

• 교육시설
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• 제9권1호
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• pp.15-26
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• 2002

According to seventh curriculum, new types of school design have been developed recently. However there are hardly any data of national status about plan and area organization, types and number of rooms of those. On this background, the purpose of this study is to provide fundamental resources for architectural designing and planning of high schools and to recognize national status of plan organizations of high schools through collecting 53 school's standard design drawings(arrangement, plan drawing) which city, province education office drafted for 4 years(from 1997 to 2000) and analyzing them into plan types, building area and type, number and area of rooms. The results of this study are as follows: 1. The range of class number of designed 53 high schools varies from 24 to 36 and 36-class-schools are 47.2% of all. Average number of class is 34.1. As a result we can find out large scale schools are mainly designed. 2. Among 53 schools, 21 schools have the department system but few of them equipped sufficient rooms and their features are very manifold. After recognizing utilization status of each schools, the standards of room type, number and plan organization should be proposed. In terms of plan type for fluent level based transferring class, most of schools are not apt. 3. In the status of type and number of rooms related to class number, range is very wide. So simplification is necessary. 4. The variations of building area, area per a class and area per a student are very large so that standard of adequate area should be established. 5. That every school which has different plan organization from conventional schools exceeds ministry of education's minimum area standards shows those standards cannot cover the diverse plan design of school. So more adequate standards should be proposed. 6. Area and number of Teacher's research room and Home Base are also very manifold from school to school. They are also considered to be simplified immediately.