• Title/Summary/Keyword: 복수(複數)

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A Research on Power Decoupled Quadruple-Active-Bridge Converter Adopting Multiple Transformers for DC Distribution System (다수의 변압기를 도입하여 포트 간 전력의 비동조화를 달성할 수 있는 DC 배전용 Quadruple-Active-Bridge 컨버터에 관한 연구)

  • Kim, Inhyeok;Lee, Jun-Young;Jung, Jee-Hoon
    • Proceedings of the KIPE Conference
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    • 2020.08a
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    • pp.139-141
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    • 2020
  • 본 논문에선 다수의 변압기를 도입하여 복수의 입출력 포트 간 전력 동조화 문제를 해결할 수 있는 Quadruple-Active-Bridge(QAB) 컨버터를 제안한다. 기존 QAB 컨버터는 단일 변압기를 사용하기 때문에 입출력 포트 사이의 전력 동조화 문제가 발생한다. 따라서 단일 변압기에서 포트 간 전력 비동조화를 달성하기 위해 입력 포트의 누설 인덕턴스를 최소화하는 최적의 변압기 설계가 필요하나, 복수의 권선 구조로 인해 최적의 설계가 어렵다는 단점이 있다. 이러한 문제점을 해결하고자 본 논문에선 기존의 단일 변압기와 복수의 변압기를 함께 설치하는 구조를 제안한다. 제안한 구조를 통해 별도의 비동조화 알고리즘 없이 출력 포트 사이의 전력 동조화 문제를 해결할 수 있다. 그리고 변압기의 설계도 복잡했던 기존 QAB 와는 달리 쉬워지는 이점도 있다. 제안한 컨버터의 구조 및 전력 비동조화를 등가 모델을 통해 이론적으로 분석한다. 그리고 이를 검증하고자 3 kW급 시작품을 통해 전력전달 구조 및 전력 비동조화를 검증한다.

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Diagnostic Significance of Total Lactate Dehydrogenase(LD) and LD Isoenzyme Measurement in the Body Fluids (체강액에서 총 Lactate dehydrogenase 및 Lactate dehydrogenase 동위효소 측정의 진단학적 의의)

  • Jeon, Chang-Ho;Bae, Eun-Kyung;Hong, Seok-Il;Kim, Chung-Sook;Lee, Young-Hyun
    • Journal of Yeungnam Medical Science
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    • v.3 no.1
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    • pp.193-199
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    • 1986
  • Body fluid Lactate dehydrogenase and its isoenzyme measurement was performed in 132 patients: 8 cases with peritonitis, 21 cases with malignant ascites, 43 cases with liver cirrhosis, 48 cases with tuberculous pleuritis, 12 cases with malignant pleural effusion respectively. Body fluid protein and glucose contents, red blood cell counts, white blood cell counts, cytologic examination were also performed as a comparative study. The results were as follows: 1. Measurement of total LD and protein amount could differentiate between transudate and exudate in the ascitic fluids. 2. In the malignant exudate of ascites and pleural fluid, the activity of LD2 isoenzyme was statistically increased compared with that of inflammatory exudate and the activity of LD4 isoenzyme was also increased compared with that of serum(P<0.05). 3. The inflammatory exudate of pleural fluid and ascites demonstrated the increase of LD5 isoenzyme activity stastistically compared with that of serum and malignant exudate(P<0.05). 4. A difference of total LD activity between malignant ascites and inflammatory ascites was significant statistically, while this was not observed in the pleural exudate. 5. Total LD and LD5 isoenzyme activity didn't correlated with the number of white blood cells in the exudate.

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Effect of Relational Structure with Multiple Vendors on IT Outsourcing Performance: Transaction Cost Theory Perspective (복수 공급업체와의 관계구조가 정보기술 아웃소싱 성과에 미치는 영향: 거래비용 이론 관점)

  • Koo, Yunmo;Lee, Jae-Nam;Son, Insoo
    • Information Systems Review
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    • v.18 no.1
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    • pp.177-197
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    • 2016
  • Information technology (IT) outsourcing is considered an effective strategy to manage and maintain organizational technologies in a rapidly changing business environment. In particular, to meet diverse market needs, many organizations that outsource their IT functions practice a multi-vendor approach as their main outsourcing strategy. Although a few studies have been conducted about the multi-vendor approach, most previous works primarily emphasized conceptual arguments and normative prescriptions. In addition, scant attention has been directed toward the relational structure between the client and multiple vendors in the multi-vendor approach and its implications for outsourcing success. This study proposes a model from the transaction cost perspective by conceptualizing two dominant relational structures of the multi-vendor approach, namely, single-vendor dominant model and the multi-vendor dominant model, and hypothesizing their relationships with two outsourcing outcomes, project success and user satisfaction. The proposed model is examined using the data collected from 246 companies that have implemented multi-vendor outsourcing. As expected, results indicate that the single-vendor dominant model has a more significant impact on project success, whereas the multi-vendor dominant model has a more significant impact on user satisfaction. The study concludes with the theoretical implications and directions for future research.

A Critical Approach to Thriller Films as Male-centric Narratives : Focusing on & (스릴러 영화의 남성 중심적 서사에 대한 비평적 접근 : <아저씨>와 <악마를 보았다>를 중심으로)

  • Hwang, Hye-Jin
    • Cartoon and Animation Studies
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    • s.22
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    • pp.65-80
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    • 2011
  • The purpose of this study is to analyze & through the hypothesis which thriller films based their narratives on the specific characteristics of Koeran society have became mainstream genre in recent Korean film industry. In the viewpoint that popular films and discourses provide the imaginary form of solving problems which threatens the maintenance of status quo in real world. & intend to disclose the identities of antagonist who condense the contradiction of Korean Society and then represent protagonist's practices to integrate disruptions from that contradictions through being a revenger. In the process of reading texts, the fact that there are some crisis in Korean Society not only public realm but also private realm and male-subjects as protagonists struggle for protecting private realm has revealed. But each film appeals to the public using two different narrative strategies. has got popularity by making a fantasy which male-subject success to rebuild the family and punish antagonist severely. In the meantime the protagonist of cannot believe his victory, this kinds of anxiety might come from the traces of antagonist as reflects so many contradictions of Korean Society. At this point, we can expect there will be something new which retrospect our own history and gaze reality itself without ideologically given complex in Korean films in the near future.

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An Exploratory Study of the 'Method of Multiple Working Hypotheses' as a Method of Earth Scientific Inquiry (지구과학의 탐구 방법으로서 '복수 작업가설의 방법'의 특징에 관한 탐색적 연구)

  • Oh, Phil Seok
    • Journal of the Korean earth science society
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    • v.39 no.5
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    • pp.501-515
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    • 2018
  • In this study, the method of multiple working hypotheses (MMWH) as a method of earth scientific inquiry was applied in a context of abductive reasoning about the formation of a rock with a specific structure, and the characteristics of MMWH revealed in the reasoning process were explored. Participants were 31 senior undergraduate students enrolled in a course in a university of education. As part of the course, the participants performed abductive inquiry with multiple working hypotheses about the formation of a rock. The students were asked to record both the processes and results of their reasoning in sketchbooks. The content of the students' sketchbook reports was analyzed according to the principle of analytic induction. Results demonstrated four assertions. First, the participants' working hypotheses were suggested in the use of resource models, and the adaption of the resource models often occurred in this process. Second, the perceptual properties of evidence influenced the activation of the resource models. Third, the kinds of observed evidence and the different interpretations of evidence resulted into different judgments on working hypotheses. Fourth, sometimes new hypotheses were generated by the combination of alternative hypotheses. Implications of these findings for earth science education and relevant research were discussed.

A Comparative Analysis on Multiple Authorship Counting for Author Co-citation Analysis (저자동시인용분석을 위한 복수저자 기여도 산정 방식의 비교 분석)

  • Lee, Jae Yun;Chung, EunKyung
    • Journal of the Korean Society for information Management
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    • v.31 no.2
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    • pp.57-77
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    • 2014
  • As co-authorship has been prevalent within science communities, counting the credit of co-authors appropriately is an important consideration, particularly in the context of identifying the knowledge structure of fields with author-based analysis. The purpose of this study is to compare the characteristics of co-author credit counting methods by utilizing correlations, multidimensional scaling, and pathfinder networks. To achieve this purpose, this study analyzed a dataset of 2,014 journal articles and 3,892 cited authors from the Journal of the Architectural Institute of Korea: Planning & Design from 2003 to 2008 in the field of Architecture in Korea. In this study, six different methods of crediting co-authors are selected for comparative analyses. These methods are first-author counting (m1), straight full counting (m2), and fractional counting (m3), proportional counting with a total score of 1 (m4), proportional counting with a total score between 1 and 2 (m5), and first-author-weighted fractional counting (m6). As shown in the data analysis, m1 and m2 are found as extreme opposites, since m1 counts only first authors and m2 assigns all co-authors equally with a credit score of 1. With correlation and multidimensional scaling analyses, among five counting methods (from m2 to m6), a group of counting methods including m3, m4, and m5 are found to be relatively similar. When the knowledge structure is visualized with pathfinder network, the knowledge structure networks from different counting methods are differently presented due to the connections of individual links. In addition, the internal validity shows that first-author-weighted fractional counting (m6) might be considered a better method to author clustering. Findings demonstrate that different co-author counting methods influence the network results of knowledge structure and a better counting method is revealed for author clustering.

A Study on Network Hospital and the Ban on Opening and Operating the Muliple Medical Institution (네트워크병원과 의료기관 복수 개설·운영 금지 제도에 관한 고찰)

  • KIM, JOON RAE
    • The Korean Society of Law and Medicine
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    • v.17 no.2
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    • pp.281-313
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    • 2016
  • Our Constitution obliges the state to protect the health of the people, and the Medical Law, which embodied Constitution, sets out in detail the matters related to open the medical institution and one of them is to prohibit the operation of multiple medical institutions In the past, there was a provision stipulating the same purpose. But because the Supreme Court interpreted that several medical institutions could be opened if the medical treatment was not made at the additional medical instition which was opened in the another doctor,s license, multiple medical institutions could be opened and operated. However, some health care providers opened the several medical institutions to another doctor's license just by the excuse of the business management and then did illegal medical cares like the unfair luring of patients, overtreatment, and commition treatment for more profits. So, the health rights of the people came to be infringed on. Accordingly, lawmakers amended the Medical Law for medical personnel not to open and to operate more than one medical institution. As the amended medical law prohibited a medical personnel to open multiple medical institution, some medical personnels insisted that the amended medical law is unconstitutional under which they could not be able to open and operate medical institutions on based on free investment and bring out the benefits of network hospitals. But the regulation to prohibit multiple institutions does not apply only to a medical personnel. Many other experts like lawyer and pharmacist can open only one office under such a restriction. If the regulation goes out of force, the procedure that multiple medical institutions should be opened and operated in the capacity as a medical corporation or a non-profit corporation does not have to be followed. And we should keep in mind that the permission for medical personels to open multiple medical institutions could lead virtually to commercial hospital. If in the nation with a very low rate of public medical service, If only a few medical personnels with capital own many medical institutions and operate commercially them, this could cause a falling-off in quality of medical service, ultimately infringe on the health rights and the life right of the people.

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