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태양광 발전용 단일 SiC 스위치 기반 8kW급 ZVZCS 부스트 컨버터
김재준(Jae-Joon Kim),표기현(Ki-Hyun Pyo),전준혁(Joon-Hyeok Jeon),경신수(Sin-Su Kyung),이은수(Eun-Soo Lee) 전력전자학회 2023 전력전자학회 논문지 Vol.28 No.3
In this paper, tapped inductor-based high-efficiency and high-power density zero-voltage and zero-current switching(ZVZCS) boost converters are proposed for 8 kW PV applications. The proposed converter uses only one SiC switch and three SiC diodes for turn-on ZCS and turn-off ZVS operations, resulting in an efficiency of over 98.2%. This value is higher than that of the conventional converter (97.3%), which uses two switches and two diodes, considering switching and conduction losses. The proposed converters are applied to 500 and 800 V of input and output voltages for PV, respectively, and verified by simulation analysis and experimental setup with SiC high-frequency switching devices manufactured from PowerCubeSemi Co., Ltd.
김우현(Kim, Woo-Hyun),오중근(Oh, Jung-Keun),김재준(Kim, Jae-Jun) 대한건축학회 2012 대한건축학회논문집 Vol.28 No.12
The purpose of architectural competition is to choose the best design to satisfied with the goal of a project. If the matters which are not satisfied with the owner’s requirement can’t be found out in the evaluation phase, however, a good sum may have to be paid for design change. Additionally, as time goes on, the possibilities for modification of the original design will be decreased. For this reason, it can be critical to shorten the design errors with the accurate work in the early part of design phase for success of a project. On this, BIM using extensively since the late 2000’s could be a good alternative. BIM(Building Information Modeling) can minimize design errors through managing data with 3D-based information. Actually, domestic public institutions recognize the advantages of BIM, and are increasing ordering quantity BIM-based project. However, some of the BIM-based projects which were already performed with great expectations have showed some problems. With this background, it is needed to find out the effectiveness for reducing design errors with applying BIM process to the project. Thus, in this study, it will be found out that in what parts of the architectural competition, the effectiveness of BIM process shows up. And, it will be found out that in what parts of the architectural competition, the problems shows up through comparing 2D-based design process and BIM-based design process.
김재준,Kim, Jae-Jun 대한석유협회 2006 석유와 에너지 Vol.2006 No.5
2006년 5월 22일부터 일주일간 중동지역 5개국 9명의 정부ㆍ산업계 인사가 대한석유협회초청으로 한국을 방함하여, 산업자원부 방문ㆍ관련기업 미팅ㆍ에너지 등 주요산업시설 방문의 일정을 소화하였다. 금번 방한은 산유국 주요인사 초청프로그램으로서, 한ㆍ산유국 국제교류 협력사업의 세부사업으로 시행된 것으로서, 에너지 산업 역사상 최초라는 의미이외에도 최근 중동지역의 중요성이 부각되는 상황에서, 향후 중동지역과의 실질적ㆍ장기적 협력채널 구축에 기여할 수 있을 것으로 평가할 수 있다.
시적 발화의 토대로서 방언과 지명 -셰이머스 히니의 『겨울나기』
김재준 ( Jae Joon Kim ) 21세기영어영문학회 2016 영어영문학21 Vol.29 No.2
This paper analyzes how the dialect of Heaney’s hometown Derry and its landscape establish the roots of his poetic utterance. Although Heaney continued to expand the range of his poetic utterance and take new models for it, many of Heaney``s early poems are enlivened by a language as it is really used by people in his local region. Heaney himself has an active interest in the phonetic and linguistic study of Ulster dialects and the sound of the place-names. He has the consistent belief that the local words and speech rhythms of the place-names are closely related to the features of the landscape. The dialects and place-names in his early poems are not yet the subject of the poems. They are important because they give him a moment of sinking into the most primitive and forgotten of the common community, so they are fundamental to his attempts to find images and symbols adequate to his predicament. The vision which they have given Heaney while he grows up into a poet includes not only the natural features but the signs of human history within it.
시와 풍경의 해독 -Seamus Heaney의 『어둠으로 들어가는 문』
김재준 ( Jae Joon Kim ) 21세기영어영문학회 1999 영어영문학21 Vol.15 No.-
The Idea of poetry as a point of entry into the buried life of feeling, or as a point of exit for it, is prevalent through Door into the Dark. In a comment on Death of a Naturalist Heaney told that poetry`s origin lay in energies that came from his personal remembering. But in Door into the Dark the energies of his poetry`s origin are found equally in language and landscape of the community he belongs to. This means that the scope of the poetry of the second book comes to be deeper and wider than the first book`s. In Door into the Dark Heaney to probe past the autobiographical and into the ancestra1, into the possibility that the sources of psychic and/or spiritual truth lie buried in language and landscape of his community. The strata of memory buried in language and landscape require Heaney to face an actual dread of ``losing`` himself to the primal or instinctual. When Heaney tried to forge the ``uncreated conscience`` of his race in his poetry, he found out that he should step into the dark to erase his strongly established self from his poetry. This means that he can expand and transcend himself only by losing himself. Losing-himself will help him get multiple viewpoints to make his poetry less partisan and more powerful. He asserts that he ``will uncode all landscapes`` just when he is able to see ``things founded clean on their own shapes and learn to lose himself while we are in the dark center of the landscape. The word ``uncode`` suggests the land`s secret, buried history that awaits one who can uncode. Heaney shows that there is an analogy between the secret, hidden activity of the poet and the secret, and hidden activity of the blacksmith and the thatcher. They all are kind of musicians in the sense that they are able to leave the audience surprised by creating the useful, meaningful, ordered things from nothing or the dead things. So Heaney`s uncoding is not only uncovering something buried in landscape but also creating the new meaning of the place. Uncoding all landscapes, Heaney shows how life and death in the human and natural world are inevitably and mysteriously intertwined. He finds thingness in human life and human quality in the things. He finds the beginning and ending of his life in the landscape, and he finds there is just one cycle between both worlds.