고출력 슁글드 태양광 모듈의 온도 저감에 따른 출력 특성 분석

배재성,유장원,지홍섭,이재형,Bae, Jae Sung,Yoo, Jang Won,Jee, Hong Sub,Lee, Jae Hyeong 한국전기전자재료학회 2020 전기전자재료학회논문지 Vol.33 No.6

An increase in the temperature of photovoltaic (PV) modules causes reduced power output and shorter lifetime. Because of these characteristics, demands for the heat dissipation of PV modules are increasing. In this study, we attached a heat dissipation sheet to the back sheet of a shingled PV module and observed the temperature changes. The PV shingled module was tested under Standard Test Conditions (STCs; irradiance: 1,000 W/㎡, temperature: 25℃, air mass: 1.5) using a solar radiation tester, wherein the temperature of the PV module was measured by irradiating light for a certain duration. As a result, the temperature of the PV module with the heat dissipation sheet decreased by 3℃ compared to that without a heat dissipation sheet. This indicated that the power loss was caused by a temperature increase of the PV module. In addition, it was confirmed that the primary parameter contributing to the reduced PV module output power was the open circuit voltage (Voc).

연식주퇴 시스템의 동적 특성 해석

배재성,신철봉,황재혁,강국정,Bae, Jae-Sung,Shin, Chul-Bong,Hwang, Jai-Hyuk,Kang, Kuk-Jeong 한국군사과학기술학회 2008 한국군사과학기술학회지 Vol.11 No.4

In order to reduce the level of recoil force, new recoil technology must be employed. The present study discusses a soft-recoil system that can reduce dramatically the recoil force. The firing sequence of the soft recoil system is radically different from that of a conventional system. The gun is latched and preloaded in its out-of-battery position prior to firing. When unlatched, the gun is accelerated and forward momentum is imparted to the recoiling parts. This momentum is opposed by the ballistic force imparted by firing and the recoil force and stoke will be reduced. In the present study, the soft-recoil system with hydraulic dampers is simulated and its characteristics are investigated theoretically. The results of the simulation show that the soft-recoil system could dramatically reduce the recoil force and the recoil stroke compared to the conventional recoil systems. However, the soft-recoil system was not able to perform well when the firing fault modes like prefire, hang-fire, and misfire happen. Hence, we need to employ a control algorithm to prevent the damage of the recoil system due to these fault mode.

Phellinus linteus, Phellinus baumii 및 Phellinus gilvus의 형태, 일반성분, 원소분석 및 무기성분 함량의 비교

배재성,장광호,이만휘,정규식,조우식,최성국,김영환,박승춘,Bae, Jae-sung,Jang, Kwang-ho,Rhee, Man-hee,Jeong, Kyu-shik,Jo, Woo-sik,Choi, Sung-guk,Kim, Young-hoan,Park, Seung-chun 대한수의학회 2003 大韓獸醫學會誌 Vol.43 No.3

진흙버섯 품종별 P. linteus, P. baumii 그리고 P. gilvus에 대한 형태학적 차이, 일반성분 및 무기성분을 조사하였다. 전자현미경 사진에서 P. gilvus와 P. linteus는 비슷한 형태를 보여주고 있다. 원소 함량의 구성비에서는 세 종류의 버섯이 모두 유사함을 보여주었다. 일반성분을 분석 비교시 수분의 함량은 P. baumii가 가장 높았으며 P. gilvus의 수분 함량은 10% 이내로 낮은 경향을 보여주었다. 식이섬유는 약 30% 이상을 함유하고 있으나 vitamin C 및 단백질의 함량은 높지 않았다. 원소분석에서 Ca의 경우 세 종류의 진흙버섯에서 P. baumi가 가장 높은 Ca 함량을 보여주었으나 통계적유의성은 없었다. 그러나 원소조성 및 일반성분 비교에서는 P. linteus, P. baumii 그리고 P. gilvus의 큰 차이점이 나타나지 않았다. The purpose of this study is to compare the morphology, general composition, elemental composition and mineral contents of Phellinus linteus, Phellinus baumii and Phellinus gilvus. In the scanning electron microscopy, P. gilvus and P. linteus had a similar shape. In the elemental composition, all of the three Phellinus spp. showed similar percent for the analyzed components. In the general composition, the water content of P. linteus. P. baumii and P. gilvus were 13%, 15% and 10%, respectively. The dietary fiber of three Phellius spp. showed more than 30%. The range of vitamin C and protein content was 1.5-2.1 g% and 3.63-3.73 g%. respectively. In mineral analysis, P. baumii of the three Phellinus spp. has the highest calcium concentration (1,135 ppm). From the above results, P. linteus. P. baumii and P. gilvus did not show any differences in the general composition and elemental composition.

유연구조물의 강인한 입력설계기법의 실험적 연구

배재성,현영오,곽동기,박영근,황재혁,Bae, Jae-Sung,Hyun, Young-O,Kwak, Dongi-Gi,Park, Young-Guen,Hwang, Jai-Hyuk 한국항공운항학회 2006 한국항공운항학회지 Vol.14 No.4

In this paper, an experimental study on the robust input shaping for control of the residual vibration of flexible structures has been investigated. Two approaches has been used for the robustness of input shaping: the first method is to increase the number of impulses, and the other includes an EI shaper using vector diagram. The input case designed by the application of the above methods has been applied to a control problem involving residual vibration of a rotating hub with two flexible appendages. It has been found by a series of experiments that the input shaper designed in this paper works well for the residual vibration control of the flexible structure.

공력탄성학

배재성,Bae, J.S. 한국전산구조공학회 2008 전산구조공학 Vol.21 No.2

쓰기 활동에서 동료 논평의 활용 가능성 탐색

배재성(Bae, Jae Seong) 학습자중심교과교육학회 2014 학습자중심교과교육연구 Vol.14 No.7

본 연구에서는 학생 글에 대한 교사와 학생의 논평 유형을 비교·분석하였다. 연구대상은 고등학교 국어교사 18명과 인문계 고등학생 48명이며, 다른 수준의 글 세 편에 대한 66명의 논평 198편에 나타난 유형을 분석하였다. 연구 결과는 다음과 같다. 첫째, 범위 기준에서, 교사는 ‘문장/단어’, ‘글 전체’, ‘문단’ 수준 순으로, 학생은 ‘글전체’, ‘문단’, ‘문장/단어’ 수준 순으로 논평을 하는 것으로 나타났다. 둘째, 성격 기준에서, 교사와 학생 모두 ‘문제/해결’, ‘칭찬/공감’, ‘요약’ 순으로 논평을 하는 것으로 나타났다. 한편, 학생은 교사에 비해 글에 대한 ‘칭찬/공감’의 논평을 많이 하고, 교사는 학생에 비해 ‘문제/해결’의 논평을 많이 하였다. 셋째, 영역 기준에서, 교사는 ‘표현’, ‘내용’, ‘조직’ 순으로, 학생은 ‘내용’, ‘표현’, ‘조직’ 순으로 논평을 하는 것으로 나타났다. 또한 학생의 경우 성별에 따른 유의미한 차이가 나타났다. 넷째, 교사와 학생의 논평 모두 글의 수준이 올라감에 따라 논평의 양이 감소하였으며, ‘칭찬/공감’ 유형이 증가하고 ‘문제/해결’ 유형이 감소하였다. 이러한 결과는 쓰기 활동에서 학생 간 동료 논평의 교육적 효과를 검증하기 위한 실증적인 기초 자료를 제공하는데 의의가 있다. This study compared comment types of high school teacher with student. For this purpose, 18 high school teachers and 48 high school students participated in this study. Participants commented for each of the three texts with different level and all comments were analyzed by types. The results of this study are as follows. First, compared to teachers, the total number of students’ comments was very less. Second, based on the scope of comment, teachers mainly commented ‘word/sentence’ level. Students mainly commented ‘whole text’ level. Third, based on the characteristic, both teachers and students mainly commented ‘problem/solution’. Forth, based on the area, teachers mainly commented ‘expression’ level. Students mainly commented ‘content’ level. Last, according to text level, teachers and students tended to comment similarly. Implications were suggested for further research in the relation of recent emphasis on peer writing comments in writing instruction at school.

신규임용교사들의 교사양성 교육과정에 대한 인식 연구 -서울시 중등 국어과 신규임용교사들의 인식을 중심으로

배재성 ( Jae Seong Bae ) 국어교육학회 2014 國語敎育學硏究 Vol.49 No.2

이 논문은 국어교사양성 교육과정의 실정을 실증적으로 파악하고, 학습자의 요구를 확인하며, 교과교육학 강좌가 변화해야 할 방향을 탐색하기 위해 신규임용교사들의 인식을 조사한 설문 연구이다. 연구 결과는 다음과 같다. 첫째, 신규임용교사들은 국어교과의 각 영역에서 모두 교수ㆍ학습 방법이나 평가 방법에 비해 이론 및 지식을 잘 알고 있다고 인식하였다. 둘째, 신규임용교사들의 영역별 교과교육론 강의 수강 경험은 교원자격 취득 경로에 따라 차이를 보였다. 셋째, 신규임용교사들은 교과교육론 강의를 통해, 교수ㆍ학습 방법이나 평가 방법에 비해 이론 및 지식을 잘 알게 되었다고 인식하였다. 마지막으로 신규임용교사들은 교과교육론 강의에서 이론 및 지식보다 교수ㆍ학습 방법이나 평가 방법을 가르치는 것이 중요하다고 인식하였다. 이 논문은 이와 같은 결과를 바탕으로 국어교사양성 교육과정에 대한 실증적인 연구가 다양하게 이루어져야 함을 제안하였다. This paper investigated beginning Korean teachers` perceptions on teacher education curriculum. This quantitative study examined teachers` perception on 1)teacher professionalism, 2)subject matter education lecture. This study showed that beginning teachers are well aware of the theory and knowledge than instructional method or evaluation. And beginning teacher learn theory and knowledge better than method or evaluation through subject matter education lecture. On the other hand beginning teachers are recognized as important for instructional method and evaluation in teacher education curriculum. Implications and ideas were suggested for further research on teacher education curriculum in secondary school teacher preparation program.

저간섭 확산코드를 이용한 디지털 TV용 송신기식별 기법에 관한 연구

배재성(Jaesung Bae),신명철(MyongChul Shin),이용태(Yongtae Lee),김승원(Seungwon Kim),차재상(Jaesang Cha) 한국통신학회 2005 한국통신학회 학술대회논문집 Vol.2005 No.6

가변스팬 모핑날개를 가진 비행체의 공력특성 및 비행 제어

배재성 ( Jae Sung Bae ),황재혁 ( Jai Hyuk Hwang ),박상혁 ( Sang Hyuk Park ),김종혁 ( Jong Hyuk Kim ) 한국항공운항학회 2010 한국항공운항학회지 Vol.18 No.4

In the aerospace field, the study on a morphing-wing is in progress to improve flight performance and perform multi flight mission. There are many concepts of morphing-wing such as camber-change, wing-twist, variable-span, and so on. In this study, the aerodynamic characteristics and flight control of an air vehicle with a variable-span morphing wing (VSMW) have been investigated. VSMW with symmetric span control(SSC) can increase cruising range of aircraft by reducing drag in various flight condition. VSMW with anti-symmetric span control(ASSC) can be used in the roll control of an aircraft. The flight control about pure rolling dynamic system and full dynamic system have been performed about the cruise missile.

풍력발전기의 성능 모니터링 및 하중분석

배재성(Jae-Sung Bae),김성완(Sung-One Kim),윤정은(Joung-Eun Youn),경남호(Nam-Ho Kyung) 한국유체기계학회 2004 유체기계 연구개발 발표회 논문집 Vol.- No.-

Test facilities for the wind turbine performance monitoring and mechanical load measurements are installed in Vestas 100 ㎾ wind turbine in Wollyong test site, Jeju island The monitoring system consists of Garrad-Hassan T-MON system, telemetry system for blade load measurement, various sensors such as anemometer, wind vane, strain gauge, power meter, and etc. The experimental procedure for the measurement of wind turbine loads, such as edgewise(lead-lag) bending moment, flapwise bending moment, and tower base bending moment, has been established. Strain gauges are on-site calibrated against load cell prior to monitoring the wind turbine loads. Using the established monitoring system, the wind turbine is remotely monitored. From the measured load data, the load analysis has been performed to obtain the load power spectral density and the fatigue load spectra of the wind turbine.