평가 기준의 조합에 따른 차원 축소 비교 연구

최재우(Jaewoo Choi),전용운(Yongun Jeon),박정선(Jungsun Park) 항공우주시스템공학회 2023 항공우주시스템공학회 학술대회 발표집 Vol.2023 No.05

환경공학과 대학생의 지속가능발전 태도에 대한 잠재적 집단 유형과 지속가능발전교육 경험과 학년에 따른 차이 분석

최재우(Jaewoo Choi),강운선(Woonsun Kang) 한국환경교육학회 2012 環境 敎育 Vol.25 No.4

The aim of research is to examine Environment Engineering Undergraduate Students Attitude towards Sustainable Development (SD). In this article the following two research questions were addressed: Firstly, Are there underlying types of environment engineering undergraduate students attitude about sustainable development? Secondly, are educational experience for sustainable development and year predictive of membership in types of environment engineering undergraduate students perception towards Sustainable Development (SD)? For this research, I carried out latent class analysis (LCA) and multinominal logistic regression. LCA is a statistical method used to identify a set of discrete, mutually exclusive latent classes of individuals based on their responses to a set of observed categorical variables. I used PROC LCA, SAS procedure for latent class analysis and multinominal logistic regression. The results are following. Firstly, 25.8% of respondents are expected to belong to the ecologism centered social welfare class. 6.0% of respondents are expected to belong to the techno-centrism centered social welfare class, 9.9% are expected to belong to the social welfare based economic growth class, 39.6% are expected to belong to the greenism class, 9.6% are expected to belong to the techno-centrism centered economic growth class, and 9.1% are expected to belong to the environment centered social and economic development class. Secondly, Both educational experience for sustainable development (p<.001) and year (p<.0001) were strong predictors of latent class membership.

유튜브 여행콘텐츠 특성이 몰입과 만족에 미치는 영향 연구

최재우 ( Jaewoo Choi ) 관광경영학회 2019 관광경영연구 Vol.88 No.-

This study has researched the effect of YouTube travel contents features on flow and satisfaction. First, this study has defined the relation of effect between YouTube travel contents and users' flow. Second, it has clarified the relation of effect between users' flow and satisfaction. Lastly, it has defined the relation of effect between YouTube travel contents features and satisfaction. With these research purposes, this study suggests practical implications for YouTube travel contents strategies of travel agency through the empirical research results. The survey was conducted from January 18th to January 28th in 2019. A total of 200 questionnaires were distributed and usable 195 questionnaires were analyzed after removing 5 irresponsible questionnaires. As a result of analysis, first, the only factor of amusement has a significant positive effect on pleasure with regard to the factor of YouTube travel contents features for users' flow. Also, with respect to time distortion, both variety and amusement have a statistically significant and positive influence on pleasure. Second, users' flow has a significant impact on satisfaction. Third, YouTube travel contents features have significant positive effect on satisfaction.

중장년층의 디지털 미디어 활용 기능 유형과 사회인구학적인 변인에 따른 차이

최재우(Jaewoo Choi),강운선(Woonsun Kang) 동아인문학회 2016 동아인문학 Vol.37 No.-

본 연구는 중장년층을 대상으로 디지털 미디어의 활용 기능을 유형화하고, 연령대, 성별, 소득, 학력과 같은 사회인구학적변인이 디지털미디어의 활용 기능 유형에 미치는 차별적 영향을 밝히는데 목적을 두고 수행하였다. 이를 위하여 정보통신정책연구원에서 제공하는 2015년 한국미디어패널 자료를 활용하였으며, 잠재적 집단분석(Latent Class Analysis: LCA)과 다중로지스틱 회귀분석을 실시하였다. 분석결과는 다음과 같다. 첫째, 디지털 미디어를 활용하기 위한 중장년층의 기능유형은 ‘디지털 문맹자(18%)’, ‘인터넷 입문자(12%)’, ‘인터넷 초보자(15%)’, ‘인터넷 중급자(18%)’, 그리고 ‘디지털 문식자(43%)’의 다섯 집단으로 유형화할 수 있다. 둘째, 연령대, 성별, 소득, 학력과 같은 사회인구학적 변인은 중장년층의 디지털 미디어의 활용 기능 유형에 유의미한 영향을 미친다. This article addressed two research questions were addressed: 1) Are there underlying types of digital skills among the middle-aged? In other words, is there a latent class structure that adequately represents the heterogeneity in underlying types of perception on digital skills? If so, what are the types? and how the middle-aged distributed types of the latent classes? 2) Are sociodemographic factors such as age, sex, grade, income predictive of membership in types of digital skills among the middle-aged? For the purpose of this study, we used the Korean Media Panel Data, and Latent class analysis (LCA) and multinominal logistic regression carried out using PROC LCA for SAS. The results are following. 1) the respondents were grouped into five latent classes: ‘digital illiterate (18%)’, ‘internet starter(18%)’, ‘internet beginner(12%)’ ‘internet middle level(5%)’, and “digital literate(43%). 2) Sociodemographic factors such as age, sex, grade, income were predictors of latent class membership.

스마트 관광 비즈니스 확장을 위한 여행플랫폼 모델의 탐색적 연구

최재우 ( Jaewoo Choi ) 관광경영학회 2019 관광경영연구 Vol.87 No.-

As an exploratory research on the travel platform model for the expansion of the smart tourism business, with the Team Heads and the Heads of the Business Departments in the travel business field as the subjects and as the interviewees of this research, by selecting the subjects who are scheduled to push ahead and plan regarding the travel platform as the interviewees, the expert interviews had been proceeded with the related items, including the following: Firstly, the direction of the travel platform: Secondly, the structure of the travel platform model; Thirdly, the constituent elements of the travel platform; Fourthly, the important matters when designing a travel platform; Etc. As a result of the research, in order to strengthen the competitiveness of a platform in the travel industry, the introduction, and the possibility of the utilization, of a cutting-edge technology regarding the travel information and the travel products and services are the very important elements. And, according to the expansions of the B2C, O2O, and OTA business models in the travel market, the preparation and the establishment of a customized-type, travel platform business model with the foreign tourists as the subjects are needed. And a standardization strategy regarding the process of the expansion of the travel platform business for drawing the agreement between the persons interested must be formulated. It is judged that, in the researches in the future, the specific, additional researches regarding the convenience of the travel platform users and regarding the commercialization of the platforms are needed.

ALU⁺를 이용한 결정질 태양전지 후면 전극 Screen Printing 횟수에 따른 특성

최재우(Choi, Jaewoo),김현엽(Kim, Hyunyup),이준신(Yi, Junsin) 한국신재생에너지학회 2011 한국신재생에너지학회 학술대회논문집 Vol.2011 No.05

기존의 p-type 태양전지 공정과 유사한 공정으로 제작되는 n-type ALU^+태양전지는 후면에 Al을 screen printing하여 emitter층을 형성한 구조이다. screen printing은 공정의 단순화와 제조 단가의 저비용으로 인해, metalization 공정에서 많이 쓰이고 있다. 본 연구에서는 양산 가능한 n-type ALU^+태양전지 제작을 위해, 후면 Al emitter 층을 single, dobule, triple로 변경하며 Al의 양을 가변하였고, 그에 따른 특성의 변화를 연구하였다. screen printing 횟수가 변경된 후면 Al emitter 층의 특성은 DIV와 LIV 측정을 통해 분석하였다. 실험 결과 Al을 single printing 하였을 때보다, double, triple printing을 통하여 Al의 양을 증가하였을 때, DIV 데이터에서 직렬저항(Rs)가 24.44{Omega}/cm²에서 0.31{Omega}/cm²으로 감소하였고, 단락전류(Jsc)는 1.26mA/cm²에서 37.7mA/cm²으로 약 300% 증가한 것을 확인할 수 있었다. 프린팅 횟수에 따른 LIV 데이터의 Fill Factor를 분석하게 되면, double printing이 64.35%로 54.75%의 triple printing보다 약 1.17배 더 향상된 것으로 확인하였다. 이러한 결과를 바탕으로 후면 Al emitter 형성시에 Al의 양이 적절하지 못한 이유로, Al emitter가 제대로 형성되지 못하거나 과하게 형성되면, 태양전지 내부에 누설 저항의 변화와 누설 전류의 증가로 인해, 단락전류(Jsc)와 Fill Factor 감소의 주요 원인이 된다는 것을 확인할 수 있었다.

유동해석 및 음향해석을 이용한 bleeding system 최적 설계

최재우(Jaewoo, Choi),김호진(Hojin, Kim),송재욱(Jaewook, Song) 한국유체기계학회 2016 한국유체기계학회 학술대회 논문집 Vol.2016 No.11

초음속 cascade 실험을 위한 제품 제작 및 검증 방법

최재우(Jaewoo Choi),서준혁(Junhyuk Seo),이성룡(Sungryong Lee) 한국유체기계학회 2018 한국유체기계학회 학술대회 논문집 Vol.2018 No.11

복합화력발전소 경영진의 안전관심이 직원의 안전참여에 미치는 영향관계에서 조직요인의 매개효과 분석

최재우(JaeWoo Choi),엄성인(SungIn Um),홍인기(InGi Hong) 한국가스학회 2016 한국가스학회지 Vol.20 No.3

조직특성 및 안전문화는 매우 다양한 요인들을 포함하고 있으며, 그러한 안전문화의 향상을 위해서는 다양한 방법으로 접근되어야 한다. 구조방정식모형 분석을 통해 복합화력발전소의 안전문화 요인의 영향관계 검증결과 경영진의 관심도가 증가할수록 교육훈련정도의 향상과, 의사소통 및 안전참여의 향상에 긍정적인 역할을 함을 알 수 있었다. 그리고, 교육훈련 강도가 높을수록 근무향상에 도움이 될 것이 예측되었다. Organization characteristics and safety culture contains a wide variety of factors. It should be accessed in a variety of ways in order to improve such a safety culture. Thru by analyzing the safety culture factor of combined-cycle-power plants, it was found to be a positive role in the improvement and enhancement for the improving of safety training, communication and training participation level by structural equation modeling analysis as the management’s interest is increased. As the safety training is emphasized, it would be help to improve work participation.

4년제 대학졸업 구직자의 구직선호 유형과 성별과 졸업대학 소재 지역에 따른 차이

최재우(Jaewoo Choi),강운선(Woonsun Kang) 동아인문학회 2015 동아인문학 Vol.33 No.-

본 연구는 한국교육고용패널조사(KEEP) 데이터를 활용하여 4년제 대학 졸업자들의 구직선호도의 잠재적 유형을 도출하고, 성별과 졸업대학 소재지에 따른 구직선호 유형의 차이를 밝히는데 목적을 두고 수행되었다. 잠재적 집단분석(Latent Class Analysis: LCA)을 활용하여 4년제 대학졸업자의 구직 선호도를 분석한 결과 4년제 대졸 구직자의 구직선호 유형은 ‘완생형(21%)’, ‘전통적 관념형(19%)’, ‘수도권일자리추구형(18%)’, ‘취업맹목형 구직자(16%)’, ‘칼퇴근 중시형(14%)’, ‘암니옴니형(7%)’, 그리고 ‘중소기업회피형(5%)’의 7개 집단으로 유형화되었다. 성별과 대학소재지가 구직선호 유형에 미치는 영향을 분석한 결과, 성별과 졸업대학 소재지역은 구직선호도 유형에 유의미한 영향을 미치는 것으로 밝혀졌다. This article examines whether there is latent class structure that adequately represents the heterogeneity in job preference of job seekers from university, and whether gender and location of university are predictive of membership in latent classes. For these, I address two researches problem: 1) Are there underlying types relate to job preferences of job seekers? If so, what are the types and their corresponding prevalence? 2) Are gender and location of university predictive of membership in job seekers classes? For these, data were used the Korea Education and Employment Panel(KEEP). Latent class analysis (LCA) and multinominal logistic regression carried out using PROC LCA for SAS. The results are following. Firstly, the respondents were grouped into seven latent classes: Secondly, gender and location of university were strong predictors of latent class membership of job seekers.