HID LAMP 驅動을 위한 類似共振形 INVERTER에 관한 硏究

金光一,裵相俊 慶一大學校 1992 論文集 Vol.8 No.1

The cricuit of QRI(Quasi-Resonant Inverter) which is able to regulate frequency in the output voltage by the ZVS(Zero Volt Switching) was investigated. We found parameters in the circuit of QRI so that they have application to the HID(High Intensity Discharge) Lamp drive. Then we simulated that by personal computer and summarized the result of simulation.

經濟法序說

朴光緖 中央大學校 法政大學 學生會 1965 法政論叢 Vol.11 No.1

Corynebacterium hofmannii에 依한 전신감염 1예

문대혁,최강원,박석건,이광호 대한감염학회 1984 감염 Vol.16 No.1

Corynebacterium of hoffmannii is a part of normal pharyngeal flora. Human infection caused by C. hofmannii is very rare. All reported cases involve prosthetic or native cardiac valve. This patient sufered from chronic alcohlism, diabetes mellitus, and acute suppurative inflammation of brain, meninges and soft tissue. And he failed to show any clinical response to various antimicrobial therapy and died after discharge.

초등교원양성대학의 교육서비스품질과 학생만족도 및 충성도의 구조적 관계

곽민석(Kwag Min Seok),곽현규(Kwag Hyun Gyu) 학습자중심교과교육학회 2017 학습자중심교과교육연구 Vol.17 No.18

본 연구는 초등교원양성대학의 교육서비스품질과 학생만족도 및 충성도의 구조적관계를 분석하는데 그 목적이 있다. 모집단으로는 현재 전국교육대학교에 재학 중인 학생들을 선정하였고, 이 중 서울과 강원도, 충청도에 소재한 A대학교, B대학교, C 대학교 학생들을 2017년 6월 5일부터 23일까지 약 3주간 표본 집단으로 설정하여 연구를 진행하였다. 연구의 수행을 위해 설문지를 측정도구로써 사용하였으며, 총 234명의 자료를 분석하여 가설을 검증하였다. 자료 처리에는 Windows용 PASW 18.0과 AMOS 20.0 프로그램을 이용하였으며, 빈도분석, 신뢰도 분석, 확인적 요인분석, 상관관계분석, 구조방정식 모형분석을 통해 자료를 분석하였다. 본 연구의 결과는 다음과 같다. 첫째, 교육서비스품질은 학생만족도에 긍정적인 영향을 미치는 것으로 나타났다. 둘째, 교육서비스품질은 학생충성도에 영향을 미치지 않는 것으로 나타났다. 셋째, 학생만족도는 학생충성도에 긍정적인 영향을 미치는 것으로 나타났다. 마지막으로 교육서비스품질과 학생충성도 사이에서 학생만족도는 매개하는 것으로 나타났다. The current study was aimed to investigate the structural relationships among educational service quality, satisfaction, and loyalty. Data were drawn from 234 students in three different universities. PASW 18.0 for windows and AMOS 20.0 program were used for data processing. Data were analyzed using frequency analysis, reliability analysis, confirmatory factor analysis, correlation analysis, and structural equation modeling techniques. The results were as follows. First, educational service quality had a positive effect on satisfaction. Second, educational service quality did not affect loyalty. Third, satisfaction had a positive effect on loyalty. Lastly, satisfaction fully mediated the relationship between educational service quality and loyalty.

A Macrocyclic Nickel(II) Complex Salt Containing Six-Coordinate Nickel(II) Ions in a Different Coordination Environment

Kwag, Jin-Suk,Park, Han-Young,Lough, Alan J.,Kim, Ju-Chang Korean Chemical Society 2010 Bulletin of the Korean Chemical Society Vol.31 No.1

Application of Bayesian statistics to seismic probabilistic safety assessment for research reactor

Kwag, Shinyoung,Oh, Jinho,Lee, Jong-Min Elsevier 2018 Nuclear engineering and design Vol.328 No.-

<P><B>Abstract</B></P> <P>Nuclear facilities are susceptible to the damage due to earthquake hazards. The recent strong earthquake events show the need to explore scenarios in which the expected seismic hazard exceeds a design basis earthquake. In this regard, the seismic probabilistic safety assessment (SPSA) methodology has been developed and utilized to access the overall risk to a nuclear power plant. However, it remains challenging to deal with various uncertainties, accurately to describe correlated events, to accommodate newly observed data and to consider severe accident scenarios within the current framework. In order to overcome such challenges and take advantage of the merits of recent systems analysis concepts, this paper explores a SPSA approach by integrating the current SPSA framework with a Bayesian network and Bayesian inference instead of utilizing the standard fault tree-based technique. The proposed approach enables one to account for what are known as Aleatory and Epistemic uncertainties, to consider the correlated events, to incorporate the additional data and to conduct vulnerability assessments in an accident condition. The proposed Bayesian-based method is demonstrated by its application to a research reactor as an example. Several case studies are conducted to demonstrate how additional information such as correlated events and newly observed data changes the system-level fragility and risk. In addition, a critical scenario is investigated in a situation in which an accident has occurred for a vulnerability assessment beyond a design-basis event. Consequently, it is shown that the proposed approach provides an enhanced framework for risk assessments at nuclear facilities under earthquake hazards. This framework is ultimately expected to be extended to effective plans to mitigate system-level risk and to enhance decision support for risk-informed designs.</P> <P><B>Highlights</B></P> <P> <UL> <LI> This study explores a Bayesian-based approach for seismic PSA of research reactor. </LI> <LI> Incorporation of a Bayesian network enables considering correlated events. </LI> <LI> It is also capable of conducting beyond-design-vulnerability assessments. </LI> <LI> Bayesian inference makes it feasible to evaluate real-time risk. </LI> </UL> </P>

The Relation between Electrical Resistivity and the Microstructure in the Al-Mn Alloys

Kwag, Young Jik 수원대학교 기초과학연구소 1997 基礎科學論文集 Vol.6 No.-

합금의 미세구조를 결정짓는 중요한 세 가지 요소는 고용체 속에 들어 있는 고용체 원소의 밀도, 석출물의 크기와 량, 그리고 각종 격자 결함이다. 연구에 사용된 알루미늄 망간 합금 속에는 1.25%의 망간이 들어 있는데 이 망간은 열처리 온도와 시간에 따라 고용체 속에 녹아 있기도 하고, 석출물로 석출하기도 한다. 열처리 온도와 시간을 이용하면 석출하는 알루미늄망간(Al_6Mn)상의 크기와 밀도를 조절할 수 있다. 1.27㎝ 두께로 스트립 캐스팅된 상태로 입수한 시료는 적당한 크기로 잘라 세 가지 다른 온도에서 2시간 열처리 한 후에 전기전도도와 강도를 측정하고 전자현미경(TEM)으로 미세구조를 측정하였다. 이 시료들은 다시 냉간 압연하여 격자 결함을 증가시킨 후 서로 다른 온도에서 열처리하여 전기전도도와 미세구조를 조사하였다. 이 실험의 결과 금속의 비저항은 고용체 속에 들어 있는 망간 원소의 량에 의해 결정되고 석출입자의 크기나 량, 그리고 격자결함에는 큰 영향을 받지 않는 것으로 나타났다.

A Study on the Influence of Choice Properties of Food Carving Decoration Lecture on Recommended Intention and Revisiting Intention

Kwag, Myung Sug,Kim, Jin Soo Kyung Hee University Management Research Institute 2020 Asia pacific journal of business review Vol.5 No.1

This paper examines the effect of the choice properties of food carving decoration lectures on the recommendation and revisiting intention. As the culinary industry grows, consumers seek not only the value of satiety through food but also the value of aesthetics. They perceived satisfaction from the taste and appearance of the food as well as the interior of the restaurant and the service. Food carving is an important means of fulfilling consumer satisfaction value which is ever-changing. This study attempts to analyze the relationship between the choice properties of food carving lectures and the course recommendation and revisiting intention. This study hypothesis was formulated and the survey was conducted on 125 respondents who had experienced food carving lectures. The reliability and validity of measurement items were verified through Cronbach's Alpha and factor analysis. As a result, all measurement items showed no abnormality. The results of the analyses are as follows. The education satisfaction, education commitment, and brand image, the choice properties of food carving decoration lecture, were found to have a positive effect on the recommendation intention. The results also showed that the education commitment and brand image of food carving decoration lectures were positively associated with revisiting intention. Lastly, the implications of these findings were suggested and for future research were discussed.

Electrical Insulation Characteristics of a High-<tex> ${\rm T}_{\rm c}$</tex> Superconducting DC Cable

Kwag, D.-S.,Cheon, H.-G.,Choi, J.-H.,Kim, H.-J.,Cho, J.-W.,Kim, S.-H. IEEE 2008 IEEE transactions on applied superconductivity Vol.18 No.2

<P>A high temperature superconducting (HTS) DC cable is ideal for transmitting large amount of electrical power over a long distance. However, it must be designed to operate reliably within the constraints of the electrical systems. Therefore, a study of the electrical insulation is important to develop a HTS DC cable because it is operated in a cryogenic high voltage environment. This paper discusses the dielectric constructions of the cable and summarizes the experiment results on the DC and impulse dielectric characteristics of the insulation material, in sheet form and mini-model cable configuration. This shows how to design such insulation to be operated reliably. These studies are essential for the insulation design of a HTS DC cable operating in cryogenic environment.</P>

Binding of zinc(II) macrocycles toward carboxylate ligands

Kwag, Jin Suk,Kim, Ju Chang,Lough, Alan J.,Lee, Byung Min Springer-Verlag 2010 Transition metal chemistry Vol.35 No.1