Fabrication of High-Quality $SmBa_{2}Cu_{3}O_{7-{\delta}}$ Thin Films by a Modified TFA-MOD Process

김덕진,송규정,문승현,박찬,유상임,Kim Duck-Jin,Song Kyu-Jeong,Moon Seung-Hyun,Park Chan,Yoo Sang-Im The Korean Superconductivity Society 2005 Progress in superconductivity Vol.7 No.1

We report a successful fabrication of high-quality $SmBa_{2}Cu_{3}O_{7-{\delta}}$ (SmBCO) thin films on $LaAlO_3$(LAO)(100) single crystalline substrates by a modified TFA-MOD method. After the pyrolysis heat treatment of spin-coated films up to $400^{\circ}C$, SmBCO films were fired at various temperatures ranging from 810 to $850^{\circ}C$ in a reduced oxygen atmosphere (10 ppm $O_2$ in Ar). Optimally processed SmBCO films exhibited the zero-resistance temperature ($T_{c,zero}$) of 90.2 K and the critical current density ($J_c$) of $0.8\;MA/cm^2$ at 77K in self-field. Compared with the $J_c$ values (normally, > $2\;MA/cm^2$ at 77 K) of MOD-TFA processed YBCO films, rather depressed $J_c$ values in SmBCO films are most probably attributed to the existence of ${\alpha}$-axis oriented grains.

제39회 한일기술사 합동심포지엄 특집 - 분과별 심포지엄 참관기 - 제4분과

김덕진,Kim, Duck-Jin 한국기술사회 2010 技術士 Vol.43 No.1

스팀 동력 플랜트의 엑서지 및 열경제학적 해석

김덕진,정정열,곽호영,Kim, Duck-Jin,Jung, Jung-Yeul,Kwak, Ho-Young 대한기계학회 2003 大韓機械學會論文集B Vol.27 No.1

Exergetic and thermoeconomic analyses were performed fer a 137-MW steam power plant. In these analyses, mass and energy conservation laws were applied to each component of the system. Quantitative balance of the exergy and exergetic cost for each component, and for the whole system was carefully considered. The exergo-economic model, which represented the productive structure of the system was used to visualize the cost formation process and the productive interaction between components. The computer program developed in this study can determine production costs of power plants, such as gas-and steam-turbines plants and gas-turbine cogeneration plants. The program can also be used to study plant characteristics, namely, thermodynamic performance and sensitivity to changes in process and/or component design variables.

No.7 공동선 신호 방식의 신호망 기능 데스트에 관한 연구

김덕진(Duck Jin Kim),박석천(Seok Cheon Park),기장근(Jang Geun Ki) 대한전자공학회 1987 대한전자공학회 학술대회 Vol.1987 No.11

간호대학생의 의사소통능력과 비판적 사고성향이 문제해결능력에 미치는 영향

김덕진 ( Kim Duck-jin ),윤석희 ( Yun Seok-hee ) 대한의료커뮤니케이션학회 2016 의료커뮤니케이션 Vol.11 No.2

Purpose: The purpose of this study was to investigate the influence of communication competence and critical thinking disposition on problem-solving skills of nursing student. Method: Data were collected from 169 nursing students by means of self reported questionnaires about communication competence, critical thinking disposition and problem-solving skills from September 5 to 13, 2016. Results: There were positive correlations between communication competence, critical thinking disposition and problem-solving skills. The critical thinking disposition (β=.41, p<.001), communication competence (β=.35, p<.001) and male (β=.13, p=.015) were significant predictors of problem-solving skills. Conclusion: It is necessary to develop an effective intervention program to improve nursing student`s problem-solving skills by critical thinking disposition and communication competence.

임금근로자의 우울관련요인: 주관적 건강과 스트레스 인지를 중심으로

김덕진 ( Duck Jin Kim ),이정섭 ( Jeong Seop Lee ) 한국산업보건학회 2016 한국산업보건학회지 Vol.26 No.1

Objectives: The purpose of this study is to analyze factors associated with depression among wage earners by subjective health and stress perception. Methods: The study subjects include 1,787 wage earners(aged 19 and older) who are currently working, using data from the 2014 National Health and Nutrition Survey. Data were analyzed using frequency test, t-test, ANOVA and multiple regression. Results: Multiple regression analysis showed that perceived stress level, subjective health status, age, monthly household income, sex, marital status, average daily sleeping time, and whether type of employment was regular or non-regular were significantly related to depression. Conclusions: It is necessary to develop an appropriate mental health promotion program and to manage prevention of depression at the national level.

ADM 상호 접속망의 패킷 스위칭 소자의 구현 및 시뮬레이션에 관한 연구

김덕진(Duck Jin Kim),최진규(Jin Kyu Choi),홍원기(Won Gi Hong),오길록(Kil Lok Oh) 대한전자공학회 1986 대한전자공학회 학술대회 Vol.1986 No.12

코로나19 팬데믹 상황에서 간호학 임상실습 교수의 온라인 시뮬레이션 지도 경험

김덕진(Kim, Duck Jin),유선영(You, Sun Young) 학습자중심교과교육학회 2022 학습자중심교과교육연구 Vol.22 No.7

Objectives The purposes of this study were to comprehensively and in-depth understanding of the nature of the nursing clinical practice faculty s experience of online simulation instruction of the COVID-19 pandemic. Methods Participants had 1:1 in-depth interviews with 10 clinical practice faculty in nursing who had experience in instruction clinical practice through online simulations of the COVID-19 pandemic. Data collection was conducted for 3 weeks from January 4 to January 25, 2021. The collected data were analyzed using Colaizzi s seven-step phenomenological qualitative analysis method. Results As a result of analyzing the online simulation teaching experience of the nursing clinical practice professor, 31 topics, 9 topic collections, and 3 categories were derived. The three derived categories were ‘Chaos that came with COVID-19’, ‘Finding your way in the chaos of the COVID-19 pandemic’, and ‘Taking one step further over difficulties’. Conclusions As the COVID-19 pandemic continues, face-to-face practice in the Department of Nursing has been changed to non-face-to-face to prevent the spread of infectious diseases. Online simulation has become an alternative practice method that can be applied in infectious disease situations. Based on this study, in order for online simulation to become an effective practice that can be applied to nursing students even in the untact era, it is required to develop and apply a program that reflects the domestic clinical field situation and the opinions of clinical practice professors. 목적 본 연구의 목적은 코로나19 팬데믹 상황에서 간호학 임상실습 교수의 온라인 시뮬레이션 지도에 대한 경험의 본질을 총체적이고 심층적으로 이해하고자 하였다. 방법 참여자는 코로나19 팬데믹 상황에서 온라인 시뮬레이션으로 임상실습을 지도한 경험이 있는 간호학 임상실습 교수 10명을 대상으로 1:1 심층면담하였다. 자료수집은 2021년 1월 4일부터 1월 25일까지 3주간 진행되었다. 수집된 자료는 Colaizzi의 7단계 현상학적 질적 분석방법을 활용하였다. 결과 간호학 임상실습 교수의 온라인 시뮬레이션 지도 경험에 대해 분석한 결과 31개의 주제, 9개의 주제모음, 3개의 범주로 도출되었다. 도출된 3개의 범주는 ‘코로나19와 함께 온 혼란’, ‘코로나19 팬데믹 혼란 속에 길 찾기’, 그리고 ‘어려움 딛고 한 걸음 더 나아가기’로 나타났다. 결론 코로나19 팬데믹이 지속되는 상황에서, 감염병의 확산을 차단하기 위해 간호학과 대면 실습은 비대면으로 변경되었다. 온라인 시뮬레이션은 감염병 상황에서 적용할 수 있는 대체실습의 방안이 되었다. 본 연구를 토대로 언택트 시대에도 온라인 시뮬레이션이 간호학과 학생들에게 적용할 수 있는 효율적인 실습이 되기 위해 국내 임상현장 상황과 임상 실습교수의 의견이 반영된 프로그램 개발과 적용이 요구되어 진다.

대학생의 도박행동

김덕진(Duck-Jin Kim) 한국산학기술학회 2017 한국산학기술학회논문지 Vol.18 No.6

본 연구는 대학생의 도박행동과 관련된 선행연구와 문헌고찰을 토대로 가설적 모형을 구축하고 검정함으로써, 예방적 차원에서 학교 및 지역사회 정신보건 실무에 기초자료를 제공하고자 수행되었다. 대학생의 도박행동과 관련된 선행요인으로는 인지적 요인, 심리적 요인, 사회적 요인 그리고 자기통제력을 포함시켰다. 인지적 요인(비합리적 도박신념), 심리적 요인(우울, 불안), 사회적 요인(부모의 감독, 부모의 지지, 친구의 지지)은 외생변수로, 자기통제력과 도박행동(도박경험, 도박수준)은 내생변수로 하여 가설적 모형을 구성하였다. 또한 성별, 음주, 흡연, 인터넷 사용시간, 스마트폰 사용시간, 친구의 도박행동, 가족의 도박행동을 조절변수로 설정하여 그 효과를 분석하였다. 본 연구의 표적모집단은 국내의 대학생이며, 근접모집단은 1개 광역도시와 4개의 지역도시에 소재한 7개 대학교에 재학 중인 남, 여 대학생 246명이다. 자료수집은 2016년 1월 25일부터 3월 31일까지 이루어졌으며, 자료분석은 SPSS 21.0과 AMOS 20.0 Program을 이용하여 공분산 구조분석을 실시하였다. 대학생의 도박행동을 예측하는 여러 요인들 중에서 자기통제력의 효과가 가장 크고, 예측된 모든 변수들에 대한 자기통제력의 매개효과가 나타났다. 따라서 대학생의 도박행동을 예방하기 위한 중재 개발 시 자기통제력을 증진시키는 방안을 우선적으로 고려할 것과 개인의 인지적, 심리적 요인과 사회적 요인들을 개선시킴으로써 자기통제력을 증진시키는 방안이 필요할 것으로 사료된다. 또한 성별을 고려한 접근 및 가족이나 친구를 포함하는 집단상담 프로그램 개발이 필요할 것으로 본다. The purpose of this study was to construct and test a structural equation model for college student’s gambling behavior. A structured questionnaire was completed by 246 college students to analyze the relationships between perspective factors(irrational gambling belief), psychological factors(depression, anxiety), social factors(parental monitoring, parental support, friend support), self-control and gambling behavior. The moderating effects of gender, friends and family’s gambling behaviors were examined. The data were analyzed using SPSS 21,0 and AMOS 20.0 programs. Self-control and psychological factors directly affected the college student’s gambling behavior, while perspective factors and social factors affected it indirectly. The model fit indices of the modified model were suitable for the recommended levels. The overall study findings suggest the need to develop a gambling prevention program for college studentsthat reinforces self-control, parental monitoring and support, and friend support while reducing irrational gambling belief, depression, and anxiety. An approach that considers gender and a development of a group counseling program for family or friends are also required.

청소년의 건강 관련 인지적 특성이 우울에 미치는 영향: 스트레스의 매개효과

김덕진 ( Kim Duck Jin ) 한국간호과학회 정신간호학회(구 대한간호학회정신간호학회) 2020 정신간호학회지 Vol.29 No.1

Purpose: The purpose of this study was to examine the mediating effect of stress on the relationship between subjective health, subjective body weight, and depression in adolescents. Methods: This study used a secondary data analysis study with the data derived from the 14th (2018) Korea Youth Risk Behavior Survey. Data of 60,040 adolescents were analyzed. Descriptive statistics, x² test, and multivariate logistic regression were used for data analysis. Results: Subjective health and subjective body image were influence to depression, and stress partially mediated it. Conclusion: Our findings suggest that it is crucial to manage stress and to perceive appropriate subjective health and subjective body weight to prevent depression in adolescents.