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알루미늄 합금 GMAW 용접부의 전기화학적 방법에 의한 내식성 평가
양예진(Ye-Jin Yang),박일초(Il-Cho Park),이정형(Jung-Hyung Lee),한민수(Min-Su Han),김성종(Seong-Jong Kim) 한국표면공학회 2017 한국표면공학회지 Vol.50 No.6
The aim of the present study is to evaluate electrochemical corrosion characteristics of base metal and weldment of Al-Mg alloy in seawater solution. The specimen was 5mm thick 5083-H321 Al alloy plate which was butt-welded using gas metal arc welding (GMAW). To identify the types of inclusions in the weldment, the microstructural observation was performed along with Energy dispersive spectrometer (EDS) analysis. The anodic polarization experiments were performed to evaluate the corrosion characteristics. After the anodic polarization test, the corroded surface was observed by SEM(scanning electron microscope) and EDS. The result of the analysis revealed a large number of voids in the weldment, especially coarse grains and inclusions in the heat affected zone. The corrosion current density of the weldment was found to be approximately 13 times higher than that of the base metal, indicating lower corrosion resistance of the weldment due to the defects in the weldment and the heat affected zone.
부부갈등, 부모공동양육 및 양육스트레스가 어머니의 양육효능감에 영향을 미치는 경로
양예진(Ye-Jin Yang),도현심(Hyun-Sim Doh) 한국아동학회 2019 아동학회지 Vol.40 No.3
Objectives: The main purpose of this study was to explore pathways from marital conflict, coparenting and parenting stress to mothers’ parenting efficacy. The purpose was achieved by examining marital conflict’s direct and indirect effects (through coparenting and parenting stress) on mothers’ parenting efficacy. Methods: The data for the study included 151 mothers of 3- to 4-year-old preschoolers in Seoul. The mothers completed questionnaires on their marital conflict, coparenting, parenting stress and their parenting efficacy. The data were conducted using SPSS 22.0 and SPSS PROCESS MACRO v2.16. Results: First, marital conflict had no direct effect on mothers’ parenting efficacy. Second, marital conflict had no indirect effect on mothers’ parenting efficacy through coparenting or parenting stress. Lastly, marital conflict had indirect effect on mothers’ parenting efficacy through coparenting and parenting stress sequentially, which means that mothers who perceived a higher level of marital conflict reported more negative coparenting, and mothers who showed more negative coparenting reported a higher level of parenting stress, which led to a lower level of parenting efficacy. Conclusion: The present study confirmed the mediation effects of coparenting and parenting stress in the relations between marital conflict and mothers’ parenting efficacy. Findings of this study especially emphasize the crucial impact of coparenting on parenting stress that affects parenting efficacy directly.
양예진(Yang Ye Jin),정재성(Jung Jae Sung) 한국통신학회 2022 한국통신학회 학술대회논문집 Vol.2022 No.2
본 논문은 수요관리 ESS의 자율 운영을 위한 기계학습 기반 스케줄링 알고리즘을 비교 검토한다. 다변수선형회귀, 회귀나무, 심층신경망 모델을 이용하여 고객 수익이 부하패턴에 따라 피크부하 감축 및 차익거래 스케줄을 결정한다. 기계학습 모델 성능 향상을 위해 VIF 지수를 기반으로 이력 데이터를 선정하였다. 제안 모델은 상업용 고객의 실 부하데이터를 이용하여 검증하였으며 스케줄링 성능은 정확도, 연산소요시간, 수익을 기준으로 비교하였다.
코로나-19로 인한 비대면 수업 상황에서 간호대학생의 학습자-교수자 상호작용이 수업만족도에 미치는 영향
최윤정(Choi Yoon Jeong),양예진(Yang Ye Jin),신민경(Shin Min Kyeong),김지연(JiYeon Kim),김민지(Min Ji Kim),김윤영(Yunyoung Kim) 학습자중심교과교육학회 2021 학습자중심교과교육연구 Vol.21 No.17
목적 본 연구에서는 코로나-19로 인한 비대면 수업상황에서 간호대학생의 학습자-교수자 상호작용이 수업만족도에 미치는 영향을 파악하고자 하였다. 방법 2021년 3월부터 4월까지 코로나-19 상황에서 비대면 수업 경험이 있는 간호대학생 185명을 대상으로 Google 설문을 이용하여 자료 수집하였으며, 기관생명윤리심의위원회 승인 내용에 따라 연구참여에 동의한 대상자만을 대상으로 하였다. 수집된 자료는 SPSS 26.0 프로그램을 이용하여 분석하였다. 결과 연구결과 학습자-교수자 상호작용, 수업만족도의 상관관계가 있는 것으로 나타났으며(r=.393, p<.001), 대상자의 학습자-교수자 상호작용이 수업만족도에 미치는 영향을 확인하기 위해 회귀분석하여 회귀모형을 확인한 결과에서 통계적으로 유의한 결과를 확인하였다(F=33.396, p<.001). 결론 본 연구결과를 통해 학습자-교수자의 상호작용은 간호대학생들의 수업만족도에 영향을 미침을 확인할 수 있었으며, 코로나-19 상황이 지속되어 비대면 학습이 불가피한 상황에서 교육과정 운영 시 학습자-교수자 상호작용 증진 전략을 고려하는 것이 필요하다 여겨진다. Objectives In this study, the effect of student-teacher interaction of nursing students on class satisfaction was investigated in non-face-to-face class situations caused by COVID-19. Methods Data were collected from March to April 2021 with written consent from 185 nursing college students who had experience in non-face-to-face classes in the COVID-19 situation, and the collected data were analyzed using the SPSS 26.0 program. Results There was a correlation between student-teacher interaction and class satisfaction (r=.393, p<.001). Regression analysis was performed to confirm the effect of the subject s student-teacher interaction on class satisfaction, and a statistically significant result was confirmed from the result of confirming one regression model (F=33.396, p<.001). Conclusions It was confirmed that the learner-teacher interaction had an effect on the class satisfaction of nursing students. It is necessary to consider a strategy to promote student-teacher interaction in a situation where non-face-to-face learning is inevitable due to the continued COVID-19 situation.
안정화 원소 Ti 첨가에 따른 스테인리스강의 해수 내 캐비테이션-침식 특성
최용원(Yong-Won Choi),양예진(Ye-Jin Yang),김성종(Seong-Jong Kim) 한국표면공학회 2016 한국표면공학회지 Vol.49 No.4
Stainless steel is widely applied in many industrial fields due to its excellent anti-corrosion and durability characteristics. However, stainless steel is very vulnerable to cavitation attack caused by high speed flow of fluid in the chloride environments such as marine environment. These conditions promote intergranular corrosion and cavitation-erosion, leading to degradation of the structural integrity and service life. In order to prevent these problems, the stabilized stainless steel is applied to the offshore and shipbuilding industries. In this study, Ti was added to 19%Cr-9%Ni as the stabilizer element with different concentrations (0.26%, 0.71%), and their durabilities were evaluated with cavitation-erosion experiment by a modified ASTM G32 method. The microstructural change was observed with the stabilizer element contents. The result of the observation indicated that the amount of carbide precipitation was decreased and its size became finer with increasing Ti content. In the cavitation-erosion experiment, both weight loss and surface damage depth represented an inverse proportional relationship with the amount of Ti element. Consequently, the stainless steel containing 0.71% of Ti had excellent durability characteristics.
아동양육시설 퇴소 청소년의 부모-자녀관계 경험에 관한 사례연구
김민정 ( Kim Min-jung ),이운경 ( Lee Woon Kyung ),김태우 ( Kim Tae Woo ),양예진 ( Yang Ye-jin ) 열린부모교육학회 2019 열린부모교육연구 Vol.11 No.2
본 연구는 아동양육시설에서 퇴소한 만 24세 이하의 청소년을 대상으로, 입소 전, 입소 후, 그리고 퇴소 이후 과정에서 이들의 부모-자녀관계에 대한 의미와 관계경험에 대해 사례연구를 통해 심층적으로 살펴보았다. 연구 참여자는 원가족이 있는 4명의 퇴소 청소년들로, 2회 이상의 심층적 반구조화식 개별면접과 관찰을 통해 자료를 수집하였다. 수집된 자료를 사례연구 방법을 통해 맥락과 구체적 사례에 초점을 두어 분석하였고, 사례 내 분석 및 사례 간분석 결과를 제시하였다. 사례 내 분석을 통해 발견된 부모-자녀관계의 구체적 경험은 물론 상이하였으나, 사례 간분석 결과 각 사례의 공통점 및 차이점을 보여주는 총 4가지 범주 및 14개 하위범주가 도출되었다. 부모-자녀관계 경험의 주요 4가지 범주는 ‘부모로부터 버려진 나,’ ‘소속감을 느끼지 못하는 나,’ ‘적응하기 위해 분투하는 나,’ ‘새로운 가족을 꿈꾸는 나’에 해당하였다. 국내의 아동양육시설 퇴소 청소년의 심리사회적 적응 및 미래의 긍정적 부모역할을 위한 개입이 절대적으로 부족한 가운데, 본 연구는 퇴소 청소년의 부모-자녀관계 경험의 특성을 고려한 적극적 개입 방안을 모색할 필요성을 보여준다. This study aimed to explore the parent-child relationship experiences of adolescents under the age of 24 who were discharged from child-care facilities. The adolescents' descriptions of parent-child relationship characteristics before and after they were placed in the child-care facilities and after discharge were explored. The participants were four discharged adolescents who had parents. Two/three in-depth individual interviews and observations were conducted to collect data. The within-case analysis revealed each participant’s unique parent-child relationship experiences throughout their life. After the between-case analysis, four main topics and fourteen subtopics emerged. The main topics were ‘Me, dumped by my own parents,’ ‘Me, having no sense of belonging,’ ‘Me, making every effort to get through difficult circumstances,’ and ‘Me, dreaming of a new family.’ It is problematic that few intervention efforts to help discharged adolescents exist in South Korea in terms of the adolescents' socio-emotional adjustment and preparation for future parenting roles. This study suggests that it is essential to provide intervention programs and policies that consider discharged adolescents’ past and current parent-child relationship characteristics and their impacts reflected in their current developmental characteristics.