논문 : Al - Li 다원계 합금에 있어서 δ' 상과 제3석출상과의 상호관계에 대한 조직학적인 해석

조현기,정동석 ( Hyun Kee Cho,Dong Seok Chung ) 대한금속재료학회 ( 구 대한금속학회 ) 1990 상변태 심포지엄 Vol.2 No.-

공리적설계/AHP를 이용한 해외무기체계 구매사업 제안서 평가지표 개발에 관한 연구

조현기,김우제,Cho, Hyun-Ki,Kim, Woo-Je 한국군사과학기술학회 2011 한국군사과학기술학회지 Vol.14 No.3

In this study, the axiomatic design(AD) method is applied to construct the hierarchical structure of evaluation criteria and the AHP method is used to calculate the weights of criteria in order to develop the proposal evaluation index for the overseas weapon system purchasing projects. The common evaluation items as main categories are selected through the review of evaluation criteria from the previous works and projects, relevant regulations and defense policy, and the design matrix using fuzzy concept is established and evaluated by the expert group in each design phase to determine the independency, that is the satisfaction of decoupled or uncoupled design, for each criteria in the same hierarchy when they are derived from the main categories. The establishment of decoupled or uncoupled design matrix provides mutually exclusiveness of how small number of DPs can be accounted for FRs within the same hierarchy. The proposal evaluation index developed in this study will be used as a general proposal evaluation index for the overseas weapon system purchasing projects which there are no systematically established evaluation tools.

Al-Cu-Mg 합금에 있어서의 2차 결함조직

조현기,우기도,Cho, Hyun-Kee,Woo, Kee-Do 한국현미경학회 1986 Applied microscopy Vol.16 No.2

The interrelation of secondary defects, intermediate S' phase and aging condition in Al-2.0 wt% Cu-1.1 wt% Mg alloy is studied by transmission electron microscope. The results obtained in this study are as follows. 1. High density of dislocation loops, helices and stacking faults are observed in this specimen with aging treatment. 2. The number of dislocation loops and the width of loop free zone (LFZ) are increased with aging time. 3. The intermediate S' phase precipitates and grows on the dislocations and secondary defects. 4. The misfit dislocations are formed around intermediate S' phase. 5. It is thought that the helices appear to be produced by the climb of screw dislocations, while the dislocation loops appear to be formed both by condensation of vacancies into collapsed discs and by interaction of helices with screw of opposite sign.

공리적설계 기반의 내부종속 AHP를 이용한 국방무기 해외 구매사업의 무기성능 평가방법 개발

조현기(Hyunki Cho),김우제(Woo-Je Kim) 한국경영과학회 2012 經營 科學 Vol.29 No.3

Test and evaluation of weapon system is an important task to evaluate the performance of overseas weapon system purchasing project. Especially, quantitative evaluation of performances is hardly completed in defense projects where multiple criteria are conflicted each other. In order to solve this problem, we apply Axiomatic Design (AD) and Inner Dependence AHP method. First, finite functional requirements (FRs) are categorized in hierarchy structure by selecting proper design parameters (DPs) to implement their corresponding FRs. If there are no ways to select DPs when design is coupled between FRs and DPs, then inner dependence is allowed to overcome the strict rule of independence in AHP. Second, the weights of DPs are calculated by applying both Inner Dependence AHP method for coupled design and normal AHP method for uncoupled or decoupled design. Finally, information axiom of AD is applied to the proposed weapon systems by calculating information contents for all parameters. Weapon system with minimum sum of information contents is considered as the best solution. The proposed method in this study should be used in multiple criteria decision making problems involving various conflicting criteria.

UNESCO 협력학교의 효과성 분석 연구

조현기(Hyungi Cho) 글로벌교육연구학회 2021 글로벌교육연구 Vol.13 No.3

PISA 2018에서의 글로벌 역량의 혁신 영역 선정을 기점으로 글로벌 교육이 부각되기시작하였다. 글로벌 역량의 중요성이 대두되면서 교육에서 글로벌 역량을 함양시키기 위한연구의 필요성도 함께 제기되었다. UNESCO 협력학교는 현장에서 이루어지고 있는 글로벌교육 관련 활동 중에서 가장 오래되고 보편적으로 이루어지고 있지만 그 효과성에 대한연구는 제대로 이루어지고 있지 않은 상황이다. 본 연구에서는 글로벌 교육의 선구자적인역할을 담당하고 있는 UNESCO 협력학교의 효과성을 PISA 2018의 글로벌 역량을 중심으로 알아보고자 하였다. 본 연구를 위해서 UNESCO 협력학교 6개교와 비교집단으로 일반학교 6개교를 선정하였다. UNESCO 협력학교의 효과를 검증하기 위해 카이제곱검정, 상관분석, 독립표본 t검증을 실시하였다. 또한, 글로벌 역량과 해외거주 경험 사이의 연관성, 글로벌 역량과 해외여행빈도 사이의 연관성을 알아보기 위해 상관분석을 이용하였다. 마지막으로 UNESCO 협력학교와 일반학교 사이의 독립표본 t검증을 통해 유의미한 차이가 있는지 알아보았다. UNESCO 협력학교와 일반학교 사이의 독립표본 t검증에서는 기능 영역과 가치 영역에서유의미한 차이를 보였다. 또한, 글로벌 역량 전체 값으로 분석한 결과에서도 유의미한 차이가 있는 것으로 나타났다. At PISA 2018, global education was highlighted as an innovative area of global competency. As global capabilities become more important, the need to cultivate them has also been raised. The UNESCO partner schools are the oldest and most common among global education-related activities in the field, but studies on their effectiveness have not been conducted properly. In this study, the effectiveness of UNESCO partner schools was investigated with a focus on the global capabilities of PISA 2018. For this study, six UNESCO cooperative schools and six general schools were selected. To verify the effectiveness of UNESCO partner schools, chi-square test, correlation analysis, and independent sample t-test were performed. Exogenous variables were removed through chi-square test and correlation analysis. The effectiveness was investigated through independent sample t-test between UNESCO partner schools and general schools. In addition, in the independent sample t-test, there was a significant difference in function and value, and there was also a s ignificant d ifference in t he o verall valu e of global competency.

DEMATEL과 ANP를 이용한 해외구매 무기체계의 평가지표 개발

조현기(Hyunki Cho),김우제(Woo-Je Kim) 한국경영과학회 2012 한국경영과학회지 Vol.37 No.2

Even though the final source selection of foreign weapon system purchase project in defense area is the most important phase, the standard evaluation index has not been developed. This paper provides an appropriate evaluation index using DEMATEL and ANP methods. First, the all possible evaluation criteria applied to the relevant previous literatures in domestic and overseas researches are derived and classified into groups. Second, DEMATEL method is used to determine the network structure representing the relations of cause and effect between groups and their sub-criteria. If isolated factors, not connected with other factors, are existed in the network structure, all factors except for the isolated ones are grouped as one large factor so that the independency between those ones is maintained. The weights of criteria are determined using AHP method if the criteria are independent relation and ANP method if the criteria are networked. The weights of higher and lower level criteria are then integrated and distributed as a point with respect to the decision making purpose. The developed evaluation index can be used as a standard one in various foreign weapon system purchase projects in defense area.

DC-DC 부스트 컨버터 고장 진단 알고리즘

조현기(Hyun-ki Cho),곽상신(Sang-shin Kwak) 전력전자학회 2012 전력전자학술대회 논문집 Vol.2012 No.11

W.I.T.H 세계시민교육을 통한 공동체 역량 신장

조현기(Hyungi Cho) 글로벌교육연구학회 2017 글로벌교육연구 Vol.9 No.2

이 연구는 초등학생들의 공동체 역량을 신장시키기 위해 W.I.T.H 세계시민교육 프로그램을 개발하여 적용하였다. 연구자 학급에는 학교 생활에 적응하지 못하는 학생, 마음에 상처를 담고 있는 학생, 자기중심적으로 행동하는 학생 등 다양한 학생들이 여러 어려움을 가지고 있었다. 이에 연구자는 학생들이 공동체 생활을 보다 원활하게 할 수있도록 초등학생들의 공동체 역량을 신장시키는 것에 목적을 두었다. 또한, 공동체 역량 신장을 위해 W.I.T.H 세계시민교육 프로그램을 구안 및 적용하여 그 효과를 검증하도록 하였다. 이 프로그램은 여건 조성과 본 프로그램으로 나눠서 진행되었으며 적용 후에는 결론 도출을 위한 반성적 검토 과정을 거쳤다. 프로그램은 5개 영역, 15개 주제로 구성되어 있으며 세계시민교육 목표와 공동체 역량 목표로 수업이 진행된다. 반성적 검토 과정에서는 양적 검증과 이를 보완하기 위한 질적 검토로 이루어져 있다. 양적 검증은 연구자가 자체 제작한 초등학생 공동체 역량 검사를 통해 사전 검사와 사후 검사를 비교 분석한다. 질적 검토는 양적 검증을 보완하기 위해 심층면담, 소감문 분석 으로 진행하였다. 연구결과 연구자는 학생들의 공동체 역량을 신장시키기 위해서는 방법적인 측면과 내용적인 측면 두 가지 모두가 병행되어야 한다는 사실을 알았다. 또한, 함께하는 삶을 공부하는 과정에서 학생들의 공동체 역량은 자연스럽게 발전하고 성장 하였다. 후속 연구로는 공동체 역량 증진을 보다 효과적으로 이루기 위해 사춘기 학생들을 위한 공동체 프로그램을 함께 진행하는 것과 W.I.T.H 모형의 정련화하는 과정이 필요하다고 본다. This researcher developed and applied W.I.T.H Global Citizenship Education Program to enhance the community competence of elementary school students. In the researcher class, a variety of students who could not adjust to school life, with heart injuries, and acted self-centered, had various difficulties. The purpose of this research is to enhance the community competence so that they can make their life more comfortable. In addition, this program was designed and applied to verify the effectiveness. This program was divided into two categories: the creation of conditions and the program. The program consists of 5 areas and 15 themes. The course is taught with the goals of global citizenship education and community competence. As a result of this research, I found that both the methodical and the content aspects must be combined in order to enhance the students community competence. In addition, in the process of studying living together, the students community competence naturally developed and grew. Based on this, I think it is necessary to carry out a community program for adolescent students together with a process of refining the W.I.T.H model in order to achieve community competence more effectively.

알코올 의존 환자에서 치료 서비스 조사(Treatment Service Review)의 신뢰도, 타당도에 대한 예비적 연구

조현기(Hyun-Kee Cho),주동식(Dong-Sik Joo),조웅제(Woong-Je Cho),변원탄(Won-Tan Byun) 한국중독정신의학회 2004 중독정신의학 Vol.8 No.1

Objectives:The purpose of this study was to evaluate the reliability and validity of Korean version of Treatment Service Review (TSR) in alcohol dependence patient Methods:Forty patients for the reliability test and forty four patients for the validity test were choosen, all of whom were diagnosed as alcohol dependence according to DSM-IV criteria and forty four patients for the validity test had treated for 8 weeks or more. Results:In the reliability test, Test-retest study and Interrater reliability were satisfactory in medical, alcohol, psychiatric problem areas. In the validity test, 1) Alcohol area of TSR problem showed between-level difference, but the other areas did not show significant between-level difference in Alcohol ward admission patients and General psychiatric ward admission patients. 2) Comparing TSR with chart record showed high correlation. 3) Correlations of treatment need with treatment provided were positive in the medical problem area but negative in the other problem areas. Conclusion:The results suggests that several Korean version of TSR problem areas showed reasonable reliability and validity, but this study is just initial step for the development of Korean version of TSR. Further study is indicated to evaluate general application.

5-레벨 NPC/H-브릿지 인버터의 예측 제어

조현기(Hyun-ki Cho),곽상신(Sang-shin Kwak) 전력전자학회 2014 전력전자학술대회 논문집 Vol.2014 No.11