에어로젤을 사용한 시설하우스의 온도 변화에 대한 연구

양지웅,이은숙,고준영,김원경,변재영,박진규,최원식,Yang, Ji-Ung,Lee, Eun-Suk,Ko, Joon-Young,Kim, Won-Kyung,Byun, Jae-Young,Park, Jin-Gyu,Choi, Won-Sik 한국산업융합학회 2020 한국산업융합학회 논문집 Vol.23 No.6

Green houses provide a more conditioned and warmer environment than the outside environment due to insulation. Currently used insulation materials include soft film (PVC, PE, EVA), foamed PE sheet, non-woven fabric, reflective film, and multi-layer insulation curtain, but there are many disadvantages and to compensate for this, silica aerogel insulation material with excellent warmth, light weight, and small volume Research using is in progress. In this study, the temperature change of the quadruple-structure green house and the temperature change in the dual-structure green house of soft film and silica airgel were investigated. The daytime temperature change was highest in A and A2 (soft film) at 10 to 16:00 after sunrise, but showed the lowest temperature at 17 to 18:00, which is the sunset time, showing the greatest change. The airgels of D and D2 showed the smallest change in temperature after sunrise and right after sunset. That is, it can be said that the airgel is hardly affected by external temperature. The temperature change at night was highest in D and D2 (aerogel) for both quadruple and dual structures. The temperature at night was measured higher in the quadruple structure than in the double structure. As for the ratio of the internal temperature to the external temperature for the quadruple structure and the double structure, D (aerogel) was not affected by the external temperature during the day in the quadruple structure and the double structure. D (Aerogel) seems to be able to reduce the damage caused by high temperatures in summer due to the high thermal insulation effect of the airgel, as the temperature rises above 4℃ at night. And in winter, it helps to save heating costs due to less heat emitted to the outside.

결정질 실리콘 태양전지 표면 역 피라미드 구조의 특성 분석

양지웅(Jeewoong Yang),배수현(Soohyun Bae),박세진(Se Jin Park),현지연(Ji Yeon Hyun),강윤묵(Yoonmook Kang),이해석(Hae-Seok Lee),김동환(Donghwan Kim) 한국태양광발전학회 2018 Current Photovoltaic Research Vol.6 No.3

To generate more current in crystalline silicon solar cells, surface texturing is adopted by reducing the surface reflection. Conventionally, random pyramid texturing by the wet chemical process is used for surface texturing in crystalline silicon solar cell. To achieve higher efficiency of solar cells, well ordered inverted pyramid texturing was introduced. Although its complicated process, superior properties such as lower reflectance and recombination velocity can be achieved by optimizing the process. In this study, we investigated optical and passivation properties of inverted pyramid texture. Lifetime, implied-Voc and reflectance were measured with different width and size of the texture. Also, effects of chemical rounding at the valley of the pyramid were observed.

교통신호등 형태별 운전자 인지반응 시간 비교 연구

양지웅(YANG, Jiwoong),김진태(KIM, Jin-Tae),김주영(KIM, Jooyoung) 대한교통학회 2018 대한교통학회지 Vol.- No.-

국제사회는 3개 렌즈(적, 황, 녹) 교통신호등 사용을 표준으로 규정으로 하나, 우리나라는 4개(적, 황, 녹색화살표, 녹색) 렌즈 교통신호등의 사용을 일반적으로 허용한다. 본 연구는 국제연합 규정 3색 신호등 사용 운전자들의 인지반응 시간과 우리나라 규정 4색 신호등 사용 운전자들의 인지반응 시간이 같지 않음을 확인한다. 피(被)실험 운전자 40명으로부터 총 1,920개 인지반응 시간자료 및 뇌파 자료를 실내시험으로 수집하고 분석하였다. 분석결과 3색 신호등이 4색 신호등보다 신뢰수준 95%에서 (1) 해석 오류가 없고, (2) 인지반응 시간이 빠르며, (3) 인지반응 시간의 표준편차도 적은 것으로 도출되었다. 뇌파 자료 분석결과 3색 신호등은 비서술적 기억 영역(전두엽; 반응 빠름)이 활성화되고, 4색 신호등은 서술적 기억 영역(측두엽; 반응 상대적으로 느림)이 활성화됨을 확인하였다. 이로 우리나라 교통신호등이 교통안전에 유리한 방향으로 발전할 필요가 있음을 제언한다. This study analyzes drivers’ reaction times from the different ways to deliver the meaning of traffic signals based on previous research in Psychology that descriptive and non-descriptive memories in human’s cerebellums play in different roles. The meaning of traffic signal lights is delivered by either the color of light or the combination of those colors. Total 40 subjects asked to react various images of traffic signals and their 1,920 reaction time data were collected and analyzed. Results showed that three-head traffic signals delivering the meaning of traffic signals with its colors provide with less and stable reaction times, at 95% confidence level, compared to the ones of four-head traffic signals delivering with the combination of those. This study suggest a direction to change the types of traffic signal lights based on the findings from this study.

Diesel-DME 혼합연료의 정적챔버내에서의 분무 및 단기통엔진내에서의 연소, 배기특성에 관한 연구

양지웅(jiwoong Yang),정재훈(jahoon Jung),윤상진(sangjin Yoon),임옥택(ocktaeck Lim) 한국자동차공학회 2012 한국자동차공학회 학술대회 및 전시회 Vol.2012 No.11

The purpose of this study was compared the spray characteristics, combustion characteristics and emissions(NOx, CO, HC, smoke) of a typical fuel(100% Diesel,DME) and Diesel-DME blended fuel in a Constant Volume Chamber(CVC) and a single-cylinder DI diesel engine. Spray characteristics were investigated about varied ambient pressure and fuel injection pressure using the common rail fuel injection system when the fuel mixture ratio is varied. the spray characteristic research parameters were spray shape, penetration length, and spray angle at seven hole injector. common types of injectors were used(Bosch). Two types of blended fuel by the mass fraction was used. The typical fuel(100% Diesel,DME) and The blended fuel by mixture ratio 95:5, 90:10 (Diesel:DME) were used. The Injection pressure was fixed by 70MPa when the ambient Pressure was varied 0,2.5 and 5MPa. The combustion experiments was conducted in single cylinder engine equipped with common rail. injection pressure is 700 bar at 1200 rpm. The amount of injected fuels is adjusted to obtain the fixed input calorie value as 972.2 J/cycle in order to compare with the fuel conditions.

정적연소기에서 분위기 압력에 따른 Diesel-DME 혼합연료의 분무 특성에 관한 연구

양지웅(Jiwoong Yang),이세준(Sejun Lee),임옥택(Ocktaeck Lim) 한국자동차공학회 2012 한국자동차공학회 부문종합 학술대회 Vol.2012 No.5

The aim of this study was compared the spray characteristics of a typical fuel(100% Diesel,DME) and Diesel-DME blended fuel in Constant Volume Combustion Chamber(CVCC). typical fuel(100% Diesel,DME) and Diesel-DME blended fuel spray characteristics were investigated about varied ambient pressure and fuel injection pressure using the common rail fuel injection system when the fuel mixture ratio is varied. The fuel injection quantity and spray characteristics were measured. the spray characteristic research parameters were spray shape, penetration length, and spray angle at seven nozzle hole injector. common types of injectors were used(bosch). Three types of blended fuel by the mole fraction was used. The typical fuel(100% Diesel,DME) and The blended fuel by mixture ratio 95:5, 90:10 (Diesel,DME) were used. The ambient pressure was varied by 5MPa from 35 to 70MPa when the ambient Pressure was varied 0,2.5 and 5MPa. The result of using Diesel-DME blended fuel. It can be confirmed from the experiment on spray characteristics of Diesel-DME blended fuels that the increased Diessel blending ratio induced the increase of the spray penetration length. The spray angle slightly increased by the blending of DME fuel. In the experiment on atomization characteristics, the DME blending caused the improvement of the diesel atomization performance.

인간이해 : 비전통적 진로를 선택한 남성의 경험에 대한 내러티브 탐구

양지웅 ( Ji Woong Yang ) 서강대학교 학생생활상담연구소 2015 人間理解 Vol.36 No.1

본 연구의 목적은 전통적 여성 중심 직업을 선택한 남성들이 그들의 진로 결정 및 적응 과정동안에 겪은 심리사회적 경험은 무엇인지 파악하는 것이다. 이를 위해서 간호사, 유치원 교사, 그리고 영양교사인 세 명의 남성을 연구의 참여자로 선정하였으며, 내러티브 탐구를 활용하여 그들의 경험을 이해하고 분석하였다. 내러티브 탐구는 연구 참여자들의 경험에 대해 자연스럽게 표현하고 그에 대한 깊이 있는 이해를 제공하는 데에 효과적인 질적 연구 방법이다. 내러티브 분석 결과, 세 명의 참가자들의 비전통적 진로선택에 대한 4개의 영역이 도출되었으며, 이를 중심으로 연구 텍스트를 생성하였다. 본 연구에서 도출된 4개의 영역은 각각 비전통적 진로에 입문하기까지의 경험, 여성이 다수인 대학생활에서의 경험, 전통적 여성 직업에 종사하는 남성으로서의 경험, 그리고 진로 미래에 대한 태도였다. 논의에서는 연구 결과에 대한 함의, 대학진로상담을 위한 시사점, 연구의 제한점 및 후속 연구를 위한 제언이 언급되었다. The purpose of this study was to explore the experiences of men who made non-traditional career choices. This study was conducted using a narrative analysis with three male workers from three occupations: nursing, kindergarten teacher, nutrition teacher. Based on analyses, four categories of non-traditional career choices were derived. Research texts were then constructed based on those categories. The four categories derived from the research were the experiences of the non-traditional career entry, the experiences of college days when men were in the minority, the experiences of men in non-traditional occupations, and attitude and plans on one`s career outlook. Implications of the findings, suggestions for college career counseling, limitations, and directions for future research were discussed.

Diesel-DME 혼합연료의 분무 및 엔진 연소특성에 관한 연구

양지웅 ( Ji Woong Yang ),정채훈 ( Jae Hoon Jung ),임옥택 ( Ock Taeck Lim ) 한국분무공학회 2013 한국액체미립화학회지 Vol.18 No.2

This purpose of this study was compared the spray, combustion and emissions (NOx, CO, HC, smoke) characteristics of a typical fuel (100% Diesel, DME) and Diesel-DME blended fuel in a Constant Volume Chamber (CVC) and a single-cyl-inder DI diesel engine. Spray characteristics were investigated under various ambient and fuel injection pressures when the Diesel-DME blended ration is varied. The parameters of spray sturdy were spray shape, penetration length, and spray angle. Common types of injectors having seven holes and made by Bosch were used. As of use, the typical fuel(100%Diesel, DME) and the blended fuel by mixture ratio 955, 90:10 (Diesel: DME) were used. The injection pressure was fixed by 70.1MPa, when the ambient pressure was varied 0.1, 2.6 and 5.1 MPa. The combustion experiments was conducted with single cylinder engine equipped with common rail injection system injection pressure is 70MPa. The amount of injected fuels is adjusted to obtain the fixed input calorie value as 972.2J/cycle in order to compare with the fuel conditions.

R프로그래밍을 활용한 고속도로 검지기와 램프 거리에 따른 속도변화에 관한 연구

양지웅(Yang, Ji Woong),김진태(Kim, Jin Tae) 대한토목학회 2018 대한토목학회 학술대회 Vol.2018 No.10

정적연소기에서 분위기 압력에 따른 Diesel-DME 혼합연료의 분무 특성에 관한 연구

양지웅 ( Ji Woong Yang ),이세준 ( Se Jun Lee ),임옥택 ( Ock Taeck Lim ) 한국분무공학회 2012 한국액체미립화학회지 Vol.17 No.4

The aim of this study was to compare the spray characteristics of a typical fuel (100% diesel, DME) and diesel-DME blended fuel in a constant volume combustion chamber (CVCC). The typical fuel (100% diesel, DME) and diesel-DME blended fuel spray characteristics were investigated at various ambient pressures (pressurized nitrogen) and fuel injection pressures using a common rail fuel injection system when the fuel mixture ratio was varied. The fuel injection quantity and spray characteristics were measured including spray shape, penetration length, and spray angle. Common types of injectors were used.

일반논문 : 부모와의 애착 유형과 학업 자아 개념 간의 관계

양지웅 ( Ji Woong Yang ) 인하대학교 교육연구소 2015 교육문화연구 Vol.21 No.2

본 연구의 목적은 부모와의 애착유형 및 학업 자아 개념과 대학생의 학업 성취 간의 관계를 탐색하는 데에 있다. 본 연구에서는 학업적으로 우수한 성취를 이룬 대학생 집단과 학업적으로 위기에 처한 대학생 집단이 부모와의 애착유형과 학업 자아 개념에서 차이를 보이는지를 살펴보았다. 이를 위해, 161명의 대학생들이 본 연구에 참여하였다. 연구 참가자 중에서 90명은 낮은 학업 성취로 인해 학업 지원 프로그램(academic support program)에 참가하고 있었으며, 71명은 그들의 우수한 학업적 성취로 우등대학(hornors college)에 소속되어 있었다. 연구결과는 부모와의 애착유형과 학업 자아 개념 간에 유의미한 상관이 있음을 보여주었다. 세부적으로는, 어머니와의 공포적(fearful), 냉담한(distant) 애착 유형과 아버지와의 의존적(dependent) 애착 유형이 학업 자아 개념과 부적 상관을 보였다. 또한, 학업적으로 우수한 대학생 집단과 학업적 위기에 있는 대학생 집단은 부모와의 애착유형과 학업 자아 개념에서 차이를 보였다. 그리고 연구의 의의와 한국적 맥락에서의 시사점, 연구의 제한점, 후속 연구를 위한 제언을 논의하였다. The purpose of this study was to explore the relationship between the two psychological constructs, patterns of relating to both parents and academic self-concept, and academic achievement. This study was designed to examine the differences between academically high-achieving college students and academically at-risk college students in patterns of relating and academic self-concept. One hundred sixty one college students participated in this study. Of the 161 participants, 90 were recruited from an academic support program and 71 were recruited from an honors college. Results showed that there are significant correlations between patterns of relating and academic self-concept. Specifically, fearful and distant patterns of relating to mother are negatively correlated with academic self-concept. A dependent pattern of relating to father was negatively correlated with academic self-concept. Also, the results of this study indicated that there are differences between academically high-achieving college students and academically at-risk college students in patterns of relating and academic self-concept. The implications of this study, insights of Korean context, limitations, and suggestions for future research are discussed.