Development of Tracking Algorithm for Floating Photovoltaic System

소병문,임익태 한국반도체디스플레이기술학회 2019 반도체디스플레이기술학회지 Vol.18 No.1

Since floating facility with mooring system can be moved and rotated by wind or other environmental variables, the error in azimuthal angle must be compensated using a GPS receiver and geo-magnetic sensor. Accordingly, when an existing photovoltaic tracking algorithm is applied to a floating photovoltaic system, it is difficult to do the optimal solar tracking. In this paper, an effective azimuthal angle algorithm is develop for the photovoltaic tracking in floating condition. In order to verify the developed algorithm, the prototype of the floating photovoltaic system is manufactured and the developed algorithm is applied to the system. The algorithm shows a good tracking feasibility on the prototype.

Growth rate and composition of InGaN during InGaN/GaN quantum wells selective area metal-organic vapor phase epitaxy considering surface diffusion

소병문,임익태,윤석범 한국공업화학회 2013 Journal of Industrial and Engineering Chemistry Vol.19 No.5

Film growth rate and composition variation were numerically analyzed during the selective area growth of InGaN on both GaN triangular stripe and hexagonal pyramid microfacets. To obtain the In composition of the film, concentration of In and Ga atoms due to the surface diffusion was added to the concentration determined from the Laplace equation that governs the gas phase diffusion. When the surface diffusion is considered, the In composition and resulting wavelength increased compared to the results obtained from the vapor phase diffusion model. The In content also increased according to the increasing mask width.

A Study on the Thermal Analysis of Circular LED Street Lights

소병문 한국반도체디스플레이기술학회 2017 반도체디스플레이기술학회지 Vol.16 No.3

This paper confirms the similarity of temperature tendency through numerical analysis and comparison with test, and it also confirms that temperature prediction of LED lightings is possible by numerical analysis. We confirmed that the temperature difference is about 10 ~ 20 °C except for some measurement points and shows similar tendency with the interpretation through manufacturing and performance analysis of AL heat sink applied Circular LED street lights and manufacturing and performance analysis of CMP-PLA heat sink applied Circular LED street lights. The simulations use Octree technique in SC/Tetra to set the grid size df the surface

ZnO 세라믹 바리스터의 미세구조에 미치는 $TiO_2$의 영향

소병문,홍진웅 한국전기전자재료학회 1998 전기전자재료학회논문지 Vol.11 No.3

ZnO varistors are characterized by the features of excellent nonlinearity and surge withstand capability. In this paper, in order to investigate the use of ZnO varistor as surge absorption device in low voltage, metal oxide material($TiO_2$) was selected as control material of grain growth. Samples of ZnO varistors were fabricated with varying the contents, and then the microstructures and V-I characteristics were measured. It was observed by SEM that the mean grain size increased with the increase of the additive. From the measurement of V-I characteristics, it was observed that according to the increase of the quantity of $TiO_2$ as additive, the operating voltage was lowered.

고등학교 『국어』 교과서 내 한 학기 한 권 읽기 학습활동의 실현 양상 연구

소병문,송기호,So, Byoung moon,Song, Gi ho 한국비블리아학회 2018 한국비블리아학회지 Vol.29 No.3

본 연구는 고등학교 "국어" 교과서의 한 학기 한 권 읽기 학습활동을 분석하여 학교도서관과 협력 방안을 모색하는 것이다. 그동안 독서 활동은 교과 지식과 이원화되어 정규 교과 수업 시간 밖에서 이뤄지는 경우가 많았다. 한 학기 한 권 읽기는 "국어" 정규 수업 시간 내 이뤄지는 독서 활동으로, <읽기-생각나누기-표현하기>를 기본 모형으로 개발되었다. 하지만 실재 11종 "국어" 교과서 22개 유형의 한 권 읽기 학습활동을 분석한 결과, 한 권 읽기는 <도서 정하기-읽기-표현하기>로 실현되었다. 단계별 학교도서관과 협력방안으로, 도서 정하기 단계는 학교도서관을 대상 도서 검색 공간으로 활용하고, 읽기 단계는 독서전략을 추가, 보완해 독서일지를 재구성하며, 표현하기 단계는 기존 독후 프로그램을 함께 운영할 수 있다. 이와 같이 한 권 읽기의 단계별로 협력함으로써 학교도서관의 교육적 역할은 더욱 견고해질 수 있으리라 기대된다. The primary purpose of this study is to analyze the learning activities of "the Reading a Book per Semester" with the goal of finding ways to collaborate with the school library. "the Reading a Book per Semester" is a program that requires students to read during the timetable-designated "Korean" class instead of encouraging students to read outside of class, as has been the case thus far. The program was designed by 3 parts: reading, sharing, and formulating. However, an analysis of 11 Korean textbooks and 22 approaches to the program showed that the model has shifted to <selecting, reading, and formulating>. Under this new model, schools could expand each step in the following ways: utilize the school libraries more as the book search space during the selection process; include writing a reading diary in the reading process; and further encourage students to read outside of the classrooms in the formulating step. If these amendments were to be applied, they would strengthen the educational purpose of the school libraries within schools.

권장도서목록을 활용한 자기 선택적 독서 프로그램이 고등학생의 독서 동기 유형에 끼친 영향 분석

소병문 한국도서관·정보학회 2019 한국도서관정보학회지 Vol.50 No.1

The purpose of this study is to understand student’s reading motivation by laying out self-selected reading program and running it at school libraries. The self-selected reading program based on self-determination theory ensures the autonomy of book selection. The self-selected reading program in this study provided a number of scope and recommended book lists in order to ensure the autonomy of book selection and developed integrated reading and writing. After finishing this program, the author measured 6 domains of reading motivation with participated students who completed this course. As a result, it turned out that autonomous motive domains excessively surpassed heteronomous motive domains. Such autonomy of book selection, one of the key features from self-selected reading programs, is expected to help making the best use of school library collections by recommended book lists and stimulating stable and sustainable reading habits driven by self-motivation. 본 연구는 학교도서관을 통하여 자기 선택적 독서 프로그램을 설계 운영한 후, 학생들의 독서 동기 유형을 파악하는데 있다. 본 연구의 자기 선택적 독서 프로그램은 도서 선정의 자율성 보장을 위해 다수 영역, 다수 도서의 권장도서목록으로 제공하였고, 읽기와 쓰기를 통합해 개발하였다. 프로그램 종료 후 이수 학생들을 대상으로 6개 영역의 독서 동기를 측정한 결과 자율 동기 영역이 타율 동기보다 월등하게 높은 것으로 나타났다. 자기 선택적 독서 프로그램은 권장도서목록을 활용해 도서 선정의 자율성을 보장하고, 자율동기에 따른 안정적이고 지속적인 독서 습관을 기를 수 있을 것으로 기대된다.

교과 연계를 위한 독서 전략의 내용 체계와 적용에 관한 연구

소병문,송기호,So, Byoung-Moon,Song, Gi-Ho 한국도서관정보학회 2020 한국도서관정보학회지 Vol.51 No.1

본 연구는 학교도서관 중심의 독서 전략 범주를 밝혀 독서 전략의 내용 체계를 구안하고, 교과 연계 방안을 모색하는 데 있다. 이를 위하여 고등학교 국어과 교육과정 분석 및 독서 전략 관련 선행 연구의 결과를 토대로 독서 전략의 내용 체계 범주를 텍스트 영역과 인지 전략으로 설정하였다. 여기에 관련 선행 연구의 활동지를 참고해 재구조화한 4개 유형의 독해 기법을 더하여 최종적으로 독서 전략의 내용 체계를 구안하였다. 본 연구의 교과 연계는 교과 교과서를 대상으로 이뤄지며, 학습활동은 탐구 과제 분석의 방법을 통하여 독서전략 적용 방안을 확인하였다. 이에 따라 고등학교 『통합사회』와 『통합과학』의 학습활동을 대상으로 그래픽 조직자를 활용한 독해 전략을 적용해 그 타당성을 검증하였다. 그 결과 독서 전략의 내용 체계를 활용한 교과 연계 방안은 교과 학습활동에 다양한 읽을 자료 제공을 통해 교과 수업을 심화하고, 독립된 독서 프로그램으로 확장해 학습내용을 익힐 수 있는 활동을 제안하였다. The purpose of this study is to structure the system of reading strategy contents and seek a subject linkage method through using it. In order to establish the contents of reading strategy, the 2015 Korean High School Revised National Curriculum's contents system and advanced research were looked at. From that curricula, text areas(the types and fields, meaning structure) and cognitive strategy(reading methods and skills) are deduced and categorized. In addition to reading techniques reorganized by referring to worksheets of advanced researches, the system of reading strategy contents was made. As the result of applying it to the learning activities of "he Integrated Society" and "he Integrated Science" a subject linkage to learn the learning contents proposed providing a variety of reading materials related to the subject and running extended reading programs.

복합소재를 이용한 저가형 3kW 소수력 발전시스템 개발

소병문,김성희,한우용 한국반도체디스플레이기술학회 2018 반도체디스플레이기술학회지 Vol.17 No.1

As the propeller end speed increases, the propeller surface is damaged in the process of bubble formation and dropout. It is intended to prevent the corrosion of the propeller by modifying the shape of the end through the winglet structure to mitigate the cavitation phenomenon. In the case of conventional SUS materials, the cost of production is so high that plastic materials are used to prevent corrosion. This paper aims to mitigate the cavitation by deforming the shape of the end through the winglet structure by using the SMC composite material of the propeller using the existing SUS

국내 ISDN 기술개발의 현황과 전망

소병문,임주환 한국통신학회 1988 정보와 통신 Vol.5 No.1

(Sr0.9Ca0.1)TiO3 세라믹 박막의 열처리온도에 따른 특성

소병문,조춘남,신철기,김진사,김충혁 대한전기학회 2002 전기학회논문지C Vol.51 No.11

- The (Sr0.9Ca0.1)TiO3(SCT) thin films were deposited on Pt-coated electrode (Pt/TiN/SiO2/Si) using RF sputtering method. The composition of SCT thin film deposited on Si substrate at room temperature is close to stoichiometry(1.081 in A/B ratio). The maximum dielectric constant of SCT thin film was obtained by annealing at 600℃. The temperature dependence of dielectric loss showed a value within 0.02 in temperature ranges of -80∼+90℃. The capacitance characteristics showed a stable value within ±4%. The drastic decrease of dielectric constant and increase of dielectric loss in SCT thin films was observed at the frequency above 200kHz.