• 한방안이비인후피부과학회지
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• 제32권3호
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• pp.186-201
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• 2019

Objectives : The aim of this study is to develop clinical practice program using reflective journals in the department of Korean medicine ophthalomology & otolaryngology & dermatology. Methods : It was applied to clinical practice and considered the adequacy of the clinical practice program using reflective journal for students who complete the clinical practice. Result : Students are given high marks for self-directed learning and Korean medicine ophththalomology & otolaryngology & dermatology professional learning.

• 한국치위생학회지
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• 제12권5호
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• pp.849-859
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• 2012

Objectives : The purpose of this study was to examine the educational effects of team learning by having learners keep a journal to record, check and reflect on their own learning. It's basically meant to investigate the effects of team learning on learning motivation and academic achievements to provide some information on teaching-learning strategy setting tailored to learner characteristics. Methods : The subjects in this study were 49 college sophomores. After they were divided into an experimental group and a control group, the experimental group of 24 students engaged in team learning from March to June, 2012, and that group was asked to keep a reflective journal every week to determine whether writing a reflective journal in every session served to boost their learning motivation and academic achievement or not. Results : 1. After the experimental group kept a reflective journal, that group underwent a significant change in learning motivation from a mean of 3.34 in the pretest to a mean of 4.01 in the posttest(p<0.05). The experimental group showed a more positive improvement than the control group. 2. After the experimental group kept a reflective journal, they underwent a significant change in academic achievement from 22.7 in the pretest to 23.5 in the posttest(p<0.05). The control group showed no significant improvement in academic achievement. Conclusions : The findings of the study illustrated that keeping a reflective journal had a positive impact on the learning motivation of the learners, and the findings of the study are expected to lay the foundation for future research in new teaching methods for the department of dental hygiene.

• 한국수학교육학회지시리즈C:초등수학교육
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• 제22권4호
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• pp.281-294
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• 2019

본 연구의 목적은 초등학교 3학년 2학기의 곱셈 학습에서 반성적 활동을 적용함으로써 학업성취도의 수학 학습과정 중에 나타나는 오류 및 처치 행동을 분석하는 데 있다. 연구참여하는 학생들에게 곱셈단원에 대하여 반성적 활동을 적용하여 수업을 재구성하여 진행하였다. 이들의 수학 학업성취도의 변화를 알아보기 위하여 사전 사후 검사를 실시하였고, 반성적 활동에서의 학습자의 오류 처치양상을 분석하기 위해 포커스 그룹의 수학적인 의사소통을 녹음하여 분석하였다. 그리고 오류 유형 및 오류 처치를 위하여 학생들의 활동지와 녹음된 대화를 분석하였다. 연구 결과, 반성적 활동을 적용한 경우 학습자의 수학학업성취도가 상승하였다. 두 자리 수의 곱셈을 학습할 때 오류 유형은 다양하게 나타났다. 그리고 반성적 활동은 학습자가 곱셈 알고리즘에 대해 반성하고 오류가 있는 계산을 분석하여 자신의 오류를 반성적으로 되돌아보고 처치하도록 돕게 됨을 확인하였다.

• 한국광학회지
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• 제13권2호
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• pp.166-170
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• 2002

본 연구에서 우리는 반사형 LCD용 반사판을 최적화하고자 한다. 반사판의 새로운 표면구조를 체계적인 수식적 접근 및 분석을 통해 구한 후, 반사특성의 결과를 바탕으로 기존의 표면구조와 비교해서 보다 최적화된 표면구조를 제시하고자 한다. 반사특성의 결과로는 새로운 표면구조가 기존의 표면구조에 비해 동일한 시야각 범위에서 보다 균일한 반사율 분포를 나타내고 있으며, 또한 주변환경을 충분히 고려해서 사용자 위주의 자유로운 시야각 범위 조절이 가능함을 알 수 있다. 결과적으로, 새로운 표면구조는 보다 균일한 반사율 분포를 가지게 됨으로써, 기존의 반사형 LCD의 시야각 의존성을 상당부분 개선할 수 있으리라 본다.

• Journal of the Optical Society of Korea
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• 제20권1호
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• pp.199-203
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• 2016

An enzyme-free optical method is proposed for estimating high concentrations of glucose in a glucose-lactose mixture, based on a predictive equation that takes advantage of the reflective optical power observed at two discrete wavelengths. Compared to the conventional absorption spectroscopy method based on Beer's Law, which is mainly valid for concentrations below hundreds of mg/dL, the proposed scheme, which relies on reflection signals, can be applied to measure higher glucose concentrations, of even several g/dL in a glucose-lactose mixture. Two probe wavelengths of 1160 and 1300 nm were selected to provide a linear relationship between the reflective power and pure glucose/lactose concentration, where the relevant linear coefficients were derived to complete the predictive equation. Glucose concentrations from 2 to 7 g/dL in a glucose-lactose mixture were efficiently estimated, using the established predictive equation based on monitored reflective powers. The standard error of prediction was 1.17 g/dL.

• 한국지구과학회지
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• 제30권3호
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• pp.366-380
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• 2009

본 연구는 수업의 3가지 맥락(자료, 과제, 역할)에서 학습자의 특성과 그룹의 상호작용에 따른 그룹과 개인의 반성적 탐구는 어떤 차이가 있는지를 알아보고 이를 통해 효율적인 반성적 탐구활동을 위한 소그룹 구성과 교사의 지도에 시사점을 얻고자 하였다. 이를 위해 고등학교 1학년 1개 학급을 선정해서 반성적 탐구활동수업을 실시하고 수업을 녹화 전사해서 언어행동분석틀과 수업상황의 3가지 맥락으로 분석하였다. 본 연구의 결과로부터 학생개인과 그룹의 반성적 탐구는 학생들의 개별특성 그 자체보다는 다튼 학생과 학급에서 어떤 관계를 가지느냐에 더 영향을 받는다는 것을 알 수 있었다.

• 한국해안해양공학회지
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• 제19권5호
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• pp.429-435
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• 2007

비선형 Boussinesq 파랑전파 모델에서 방파제, 호안 등의 반사 경계면에 스펀지층을 설치하여 반사율을 모의하는 방법을 제안하였다. 스펀지층의 반사특성을 도출하기 위하여 상대 스펀지폭(스펀지층 폭/입사파장)을 변화시키는 일차원 수치실험을 수행하였다. 실험결과, 상대 스펀지폭을 조정함으로써 무반사에서 완전반사까지 반사율을 효과적으로 구현할 수 있음을 보였으며, 실험결과에 근거하여 반사율과 관련 무차원 변수들간의 다중회귀분석식을 제시하였다. 마지막으로, 본 스펀지층을 이차원 방파제에 적용하였으며, 스펀지층이 반사경계로서 평면 이차원 조건에서도 충분히 효과적으로 사용될 수 있음을 예시하였다.

• 한국과학교육학회지
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• 제32권9호
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• pp.1405-1416
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• 2012

This study aims to analyze how pre-service science teachers' reflective thinking is presented during the microteaching process. The subjects of this study were 13 students who attended a lecture course on science teaching methods offered by the Department of Science Education of the College of Education at a national university. The simulated lessons that were performed during the microteaching process went through peer assessment and self-assessment. Then, the next set of lessons was conducted based on the assessment results. After the first set of simulated lessons, the pre-service teachers' reflection at the routine and technical levels was most remarkable in the focus dimension. In the inquiry and change dimensions, technical reflection stood out. Dialogic or transformative reflection was rarely presented. In addition, most of the pre-service teachers displayed mingling patterns of reflection levels in all of the three dimensions. The results of this study, in particular, prove that microteaching has a high level of applicability in terms of reflective thinking and instructional technology. Accordingly, there is a need for subsequent studies to create a new model that can encourage pre-service teachers' reflective thinking by structuralizing peer and self-assessment during the process of microteaching.

• 한국태양에너지학회 논문집
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• 제31권2호
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• pp.53-62
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• 2011

Heliostat in the tower type solar thermal power plant is a sun tracking mirror system to reflect the solar energy to the receiver and the optical performance of it affects to the efficiency of whole power plant most significantly. Thus a proper design of structure of the heliostat reflective surface could be the most important step in the construction of such power plant. The work presented here is a design of structure of optical surface of heliostat, which will be used in 200kW solar thermal power plant. The receiver located at 43(m) high from ground in tower has $2{\times}2$(m) rectangular shape. We first developed the software tool to simulate the energy concentration characteristics of heliostat using the ray tracing technique. Then, the shape of heliostat reflective surface is designed with the consideration of heliostat's energy concentration characteristics, production cost and productivity. The designed heliostat's reflective surface has a structure formed by canting four of $1{\times}1$(m) rectangular flat plate mirror facet and the center of each mirror facet is located on the spherical surface, where the spherical surface is formulated by the mirror facet mounting frame.

• 한국보육지원학회지
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• 제17권2호
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• pp.89-101
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• 2021

Objective: The purpose of this study is to verify the effect of directors' coaching leadership on teachers' play implementation competencies and the mediation effects of teachers' reflective thinking and creative job performance by conducting a structural relationship analysis. Methods: The subjects of this study were child care teachers who were purposefully sampled from the metropolitan area which includes Seoul, Incheon, and Gyeonggi Province. A total of 267 questionnaires were analyzed after excluding poor or incomplete questionnaires by use of SPSS Statistics 25.0 and the AMOS 21.0. Results: Directors' coaching leadership was positively correlated with teachers' reflective thinking, creative job performance, and their play implementation competencies. Directors' coaching leaderships directly and indirectly influenced teachers' play implementation competencies, which was mediated by teachers' reflective thinking and their creative job performance. Conclusion/Implications: Directors' coaching leadership has a significant implication for teachers' play implementation competencies which became more important after the national curriculum standards had been revised.