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수증기 메탄 개질 반응을 이용한 수소 생산용 Ni-Cr-Al 다공체 지지 촉매의 제조, 기계적 안정성 및 수소 환원 효율
김규식,강태훈,공만식,박만호,윤중열,안지혜,이기안,Kim, Kyu-Sik,Kang, Tae-Hoon,Kong, Man Sik,Park, Man-Ho,Yun, Jung-Yeul,Ahn, Ji Hye,Lee, Kee-Ahn 한국분말재료학회 (*구 분말야금학회) 2021 한국분말재료학회지 (KPMI) Vol.28 No.3
Ni-Cr-Al metal-foam-supported catalysts for steam methane reforming (SMR) are manufactured by applying a catalytic Ni/Al<sub>2</sub>O<sub>3</sub> sol-gel coating to powder alloyed metallic foam. The structure, microstructure, mechanical stability, and hydrogen yield efficiency of the obtained catalysts are evaluated. The structural and microstructural characteristics show that the catalyst is well coated on the open-pore Ni-Cr-Al foam without cracks or spallation. The measured compressive yield strengths are 2-3 MPa at room temperature and 1.5-2.2 MPa at 750℃ regardless of sample size. The specimens exhibit a weight loss of up to 9-10% at elevated temperature owing to the spallation of the Ni/Al<sub>2</sub>O<sub>3</sub> catalyst. However, the metal-foam-supported catalyst appears to have higher mechanical stability than ceramic pellet catalysts. In SMR simulations tests, a methane conversion ratio of up to 96% is obtained with a high hydrogen yield efficiency of 82%.
분말 합금법으로 제조된 Fe-Cr-Al 금속 다공체의 구조, 미세조직 및 기계적 특성
김규식,강병훈,박만호,윤중열,이기안,Kim, Kyu-Sik,Kang, Byeong-Hoon,Park, Man-Ho,Yun, Jung-Yeul,Lee, Kee-Ahn 한국분말야금학회 2020 한국분말재료학회지 (KPMI) Vol.27 No.1
The Fe-22wt.%Cr-6wt.%Al foams were fabricated via the powder alloying process in this study. The structural characteristics, microstructure, and mechanical properties of Fe-Cr-Al foams with different average pore sizes were investigated. Result of the structural analysis shows that the average pore sizes were measured as 474 ㎛ (450 foam) and 1220 ㎛ (1200 foam). Regardless of the pore size, Fe-Cr-Al foams had a Weaire-Phelan bubble structure, and α-ferrite was the major constituent phase. Tensile and compressive tests were conducted with an initial strain rate of 10<sup>-3</sup>/s. Tensile yield strengths were 3.4 MPa (450 foam) and 1.4 MPa (1200 foam). Note that the total elongation of 1200 foam was higher than that of 450 foam. Furthermore, their compressive yield strengths were 2.5 MPa (450 foam) and 1.1 MPa (1200 foam), respectively. Different compressive deformation behaviors according to the pore sizes of the Fe-Cr-Al foams were characterized: strain hardening for the 450 foam and constant flow stress after a slight stress drop for the 1200 foam. The effect of structural characteristics on the mechanical properties was also discussed.
웹 브라우저의 고속 실행을 위한 뉴 메모리 기반 캡처 기법
김규식 ( Kyu-sik Kim ),김태석 ( Tae-seok Kim ) 한국정보처리학회 2015 한국정보처리학회 학술대회논문집 Vol.22 No.1
본 논문에서는 웹 브라우저의 사용자 응답성을 개선하기 위해 뉴 메모리를 활용하는 기법을 제안한다. 프레임버퍼에 저장된 기본 웹 페이지의 실행 화면을 뉴 메모리에 캡처하고, 이를 웹 브라우저 실행 시 그대로 복원함으로써 사용자가 체감하는 웹 브라우저의 응답성을 크게 개선한다. 또한 제안하는 기법을 뉴 메모리 에뮬레이션 보드에 직접 구현하여 그 성능을 검증하고자 한다.
김규식(Kyu-Sik Kim) 영남신학대학교 2011 신학과 목회 Vol.36 No.-
As marriage is an institution established by God, there is God's intention in marriage. Husbands and wives should pursue satisfaction and happiness through their marriage life, but human satisfaction and happiness cannot be the essence of marriage. Nevertheless, husbands and wives pursue satisfaction and happiness as crucial conditions of their marriage life mainly because churches have neglected value education on the essence of marriage. The seriousness of contemporary marital distress is looming as a crisis of churches consisting mainly of families. The collapse of a family through divorce is a crisis not only to the family but also to the church. The present researcher assumed that marital distress and divorce are caused by the absence of marital education in churches, and wrote this thesis in order to emphasize that churches should carry out actively marital education based on Christian values. The purpose of this study was to find core values for marital education in Martin Luther's view on marriage. There have been many studies on Luther in Korea, but few of them were about his ideas on family and marital relationship. Thus, this study is expected to trigger various subsequent studies on Luther's understanding of family and husband wife relationship. The researcher analyzed Luther's view on marriage from the viewpoint of God's gift and secularity, and divorce from the viewpoint of God's love and forgiveness. In addition, this study suggested two conditions for maintaining marital stability, which are the vocation of serving the spouse based on God's calling and the office as a pastor and teacher for parenting. Based on the results of this study, lastly, the researcher sorted out and presented core values for church based marital education. Marital education based on the results of this study is expected to have a positive effect on husbands and wives' faith oriented thinking and their enhanced marital satisfaction and stability.
김규식(Kyu-Sik Kim),강연준(Yeon June Kang) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.5
In this paper, a new method for identifying the joint properties from the measured FRFs of an assembled system and its substructures is presented. All of parameters of the joint system should be taken into consideration in a model for the joint, because the dynamic behaviours of the assembled system can be generally affected by all parameters at its joint. In order to comprehensively identify all parameters of joint system, a new substructure synthesis algorithm with a flexible joint model based on FRF data has been developed, and then the joint identification technique based on this new algorithm is introduced here. The validation of the identification and coupling method is conducted by using various beams combined with bolted joints. Results show that the FRFs of assembled structure can be estimated accurately by using the proposed coupling method with joint effect obtained from the proposed identification technique.
비소세포폐암 환자의 혈장 DNA를 이용한 Microsatellite 분석
김규식 ( Kyu Sik Kim ),김은정 ( Eun Jung Kim ),김수옥 ( Soo Ock Kim ),오인재 ( In Jae Oh ),박창민 ( Chang Min Park ),정주연 ( Ju Yeon Jeong ),김유일 ( Yu Il Kim ),임성철 ( Sung Chul Lim ),박종태 ( Jong Tae Park ),김영철 ( Young Ch 대한결핵 및 호흡기학회 2005 Tuberculosis and Respiratory Diseases Vol.58 No.4
부부문제에서 분노의 유발 원인과 대처 전략에 대한 연구
김규식(Kyu Sik Kim) 영남신학대학교 2009 신학과 목회 Vol.32 No.-
The anger itself is a kind of neutral emotion. However, dysfuctional anger expression in the couple relationship can facilitate severe results such as marital distress. family violence, and divorce. Thus, this study aimed at finding the cause and treatment strategies for anger in marital distress. I found two kinds of angers facilitating marital distress through this study. First, is the dysfunctional behaviors(DB) accelerating partner's anger. Second, is the dysfunctional cognitions(DC) accelerating our own anger. The DB had four main parts: the skill deficiencies of couple communications, problem solving, anger expressions, and aversive control systems. The DC had three main parts: irrational belief, dysfunctional cognitions, and selective perceptions. The effective treatment strategy to eliminate anger in the marital distress was the cognitive behavioral approach(CBA). The main target of the CBA was to change the DB and DC to functional behaviors and cognitions.
김규식(Kyu-Sik Kim) 영남신학대학교 2014 신학과 목회 Vol.42 No.-
The purpose of this study was to find strategies for characterizing the Department of Christian Education. That Christian education exists as an independent academic department in theological universities and seminaries basically assumes that it has an identity essentially different from theology and that, as a part of social science, it has its own color distinguished from the Department of Education. Of course, this color can be expressed specifically through the characterization of the academic department, but the characterization should be preceded by the establishment of the ideal image of a capable person pursued by the Department of Christian Education. It is because, although the professors in the department are diverse in major and teaching method, such an ideal image of a capable person sought by the department can be a common denominator that bring forth unity under the big umbrella of Christian education. In order to establish the ideal image of a capable person pursued by the Department of Christian Education, first of all, this study analyzed the educational purposes and goals of the department and derived three images: one who has a healthy character; one who has a spiritual identity as a Presbyterian Christian; and one who has specialties in the practice of Christian education. Second, this study suggested areas for the characterization of the Department of Christian Education, and the basic premises for the discussion were: that it is compatible with the regional characteristics of the Yeongnam region; that it is feasible; and that it is agreeable to the professors, students, and alumni of the school. As a result, three areas were suggested according to the developmental stage, which are specialists in education, teachers of Christian alternative schools, and specialists in Christian home education. Lastly, this study proposed strategies for the characterization of the department including connection to field works for building education systems, establishment of certification systems, improvement in curriculums, follow-up of graduates, fund raising for characterization, and MOUs with similar academic departments in foreign countries.
인성교육의 장으로서 생활관 기능 확장을 위한 방안 연구
김규식(Kyu-Sik Kim) 영남신학대학교 2016 신학과 목회 Vol.46 No.-
This study is about strategies for enhancing functions of residence as a field for character building education. As the residence in its characteristics is a space for students who lived a life with different culture, environment and values to interact one another, it can be the most appropriate place to maximize character building education of students by utilizing characteristics of residence if educational intention of college is to be reflected fully. The author took Alfred Adler’s individual psychology as a theoretical background for directions of character building education. In terms of individual psychology, human’s basic motives are regarded as the pursuit of belonging and community feeling, and because it may be correspond to the target of ultimate pursuits of character building education. Though character building education may be available for people in all ages, this study was in search of strategies for character building education centered on the residence applicable for undergraduate students who are in the early adult stage of development after high school graduation. In detail, this study discussed strategies for enhancing functions of the residence as directions of character education for them and a field of character education, and they are firstly, selection of freshman students through residence character education selection, secondly, development of curriculum focusing on the residence and thirdly, the relationship within the residence and establishment of care system. It is necessary to benchmark domestic dormitory models in pursuit of residential colleges. At the same time, in reference to education targets that foreign brand name universities have pursued for a long time, it is also necessary to constantly search for strategies to maximize functions of dormitory as a field of character building education appropriate for characteristics of our school.