• Proceedings of the KIEE Conference
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• 2007.07a
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• pp.46-47
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• 2007

전력시스템안정기는 전력시스템의 저주파 댐핑을 효율적으로 향상시키기 위해 사용되는 제어기이다. 전력시스템안정기의 동적 특성은 위상 보상기의 이득과 시정수와 같은 선형 파라미터와 출력 리미터와 같이 비평활, 비선형 특성을 나타내는 비선형 파라미터에 영향을 받는다. 기존의 선형 제어 방법인 고유치 분석을 통한 선형 파라미터의 최적화 방법은 소신호 동작 범위에 대한 최적화 기법이기 때문에 큰 상정사고 시 효과적인 댐핑 향상을 보장할 수 없게 된다. 이를 극복하기 위하여 하이브리드 시스템에 신경회로망을 임베디드화하여 체계적인 방법으로 비선형 파라미터를 최적화한 후, 고유치 분석을 통해 선형 파라미터를 최적화함으로 전력시스템안정기의 성능 향상을 도모할 수 있다.

• Prospectives of Industrial Chemistry
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• v.24 no.3
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• pp.28-41
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• 2021

고분자 시스템의 경우 매우 상이한 시간 및 길이 스케일(time and length scale)에 연관된 복잡한 내부 구조(internal structure)를 가지고 있기 때문에 전통적인 실험 방법만으로는 체계적이고 종합적인 연구가 쉽지 않다. 최근 다양한 시간 및 길이 스케일에 연관된 연구를 진행할 수 있는 다중 스케일 전산 모사(multiscale computer simulation) 방법은 이러한 고분자 시스템 연구에 있어서 새로운 대안으로 각광받고 있다. 본 논문에서는 최근 급격한 발전을 이룬 고분자 용액(polymeric liquid) 시스템에 대한 평형(equilibrium) 및 비평형(nonequilibrium) 전산 모사(computer simulation) 방법들에 관해 소개하고 이를 통합적으로 해석할 수 있는 다중 스케일 전산 모사 방법에 대해 여러 가지 사례를 들어 살펴보았다.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.35 no.9
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• pp.1091-1097
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• 2011

The SGBEM-FEM alternating method has been known to be a very effective method for analyzing threedimensional cracks in a finite body. The accurate values of the stress intensity factor can be obtained for a general planar or nonplanar three-dimensional crack. In the existing method, eight-noded quadrilateral boundary elements are used to model a crack. In some cases, three-node triangle boundary elements are more convenient for the modeling of a crack with a general shape. In this study, a crack is modeled with three-noded triangular and seven-noded quadrilateral elements by using the advancing-front mesh generation method. The stress intensity factors are obtained for cracks with several shapes and the accuracy of results is examined.

• Journal of the Society of Naval Architects of Korea
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• v.30 no.1
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• pp.73-86
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• 1993

This paper describes a potential-based panel method for the prediction of steday performance of a marine propeller operating in a uniform oncoming flow. An integral equation with unknown dipole strengths is formulated by distributing the normal dipoles and/or sources on the blade and hub surfaces and the wake sheet, and is solved numerically upon discretization. A hyperboloidal panel has been adopted to compute the potential induced by a normal dipole on a non-planar quadrilateral panel. The Kutta condition is satisfied by iteratively annulling the pressure jumps at the trailing edge. Extensive convergence tests are carried out, and the influence of the wake model upon performance is studied. Predicted performance is shown to correlate well with the experiments.

• Journal of Broadcast Engineering
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• v.24 no.1
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• pp.153-163
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• 2019

This paper analyzes the film in a quantitative method to understand the principle to assign film's narrative as an art form. To do this, we tried to quantify 'conflict', which is a key factor of narrative, according to measuring the information represented in images. And thus, we measured the face areas of Protagonist and Antagonist, and then analyzed the relationship between area and conflict. The reason why the face area is used as the measurement target is because it is an index showing the way in which the director represents the conflict in the film. The quantification of conflict in films can be applied to indexing the narrative structure or specific conflict sections based on objective figures. In addition, it is possible to visualize narrative through conflict graphs, and it is meaningful that the computational criticism can apply into narrative study by quantification of conflict.

• 한국문예비평연구
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• no.65
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• pp.123-149
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• 2020

This study identified objective placeness throughout the writing of Na, Hye-seok, who was Korea's first female Western painter and early modern writer, and analyzed her spatiality around two keywords, "confined space" and "delay space." The investigator applied the concept of gender geography, which maintains that place experiences organize existence, and demonstrated the intrinsic aspects of placeness. First, confined spaces expressed the institutional contradictions of Joseon with the analogy of collapse and extinction. Inns and boarding houses were daily spaces and also temporary places of residence that she had to leave some day. Gyeongseong was a hybrid place of both success and failure. Secondly, Japan was a space of growth to study modernity and a delay space to escape from fear for Na. Her Western experiences underwent the procedure of discovering otherness inside a civilized state instead of self-colonization and asking questions about the places where she belonged. Na's place experiences and their connotations revealed in her writing show a gap between the ideal and reality of a subject facing her given destiny and between her inner conflicts. The present study demonstrated the daily conditions, social status, and characteristics of women through spaces beyond ideological placeness as a common idea, thus holding its significance. The specific daily and multiple nature produced in relations between a certain subject and the existential situation of a place will play significant roles in the theoretical extension of gender discourse in the future.

• Journal of Korean Medical classics
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• v.18 no.1 s.28
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• pp.7-32
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• 2005

청대적명의오국통(淸代的名醫吳摘通), 불근시'온병'제가(不僅是'溫病'諸家), 우시관어림상각과논치적명가(又是關於臨床各科論治的名家). 관어(關於)${\ulcorner}$온병조변${\lrcorner}$(溫病條辨)상온병학(上溫病學)술리논적특정(術理論的特征), 정리여하(整理如下). 대온병병인(對溫病病因), 파융합제가문학설(把融合諸家們學說), 규명시종일관(糾明始終一貫), 제시료정상화비정상적'복기'(提示了正常和非正常的'伏氣'), '사천시영현행지기'('司天時令現行之氣'), '려기'인기온병적삼도인치온'지학설('戾氣'引起溫病的三圖因致溫'之學說). 吸收諸家們的長處(흡수제가문적장처), 創案'三焦辨證'濃體系(창안'삼초변증'농체계). 수선(首先), 타이'삼초'위강영구분병위적상하(他以'三焦'爲綱領區分病位的上下), 천채(淺採), 기차이'륙경'위구별설명장역부화경락적불동(其次以'六經'爲區別說明?驛腑和經絡的不同), 재일차이'위기영혈'(在一次以'衛氣營血') 구별료표리적선후(區別了表裏的先後). 우용횡향급종향논술료온사적전변규률(又用橫向及縱向論述了溫邪的傳變規律), 최후제시료'치상초여우(最後提示了'治上焦如羽), 비경불거(非輕不擧). 치중초여형(治中焦如衡), 비평불안(非平不安). 치하초여권(治下焦如權), 비중불침(非重不沈).'적약물치료원칙(的藥物治療原則). 재질병적변별구분'온열'화'습열'(在疾病的辨別區分'溫熱'和'濕熱'), 재약물적사용상구별'강조'화'유윤'(在藥物的使用上區別'剛燥'和'柔潤'), 저우시오씨적온병학술특징지일(這又是吳氏的溫病學術特徵之一). 재치법(在治法), 방제(方劑), 약양(藥量), 전법(煎法), 복법(服法), 음식(飮食), 조양등적온병치료방면(調養等的溫病治療方面), 제시료광범위적'금기'학설(提示了廣範圍的'禁忌'學說). 타심각적감각도료오치온병적결과(他深刻的感覺到了誤治溫病的結果), 위료방지오치(爲了防止誤治), 관전치료'금기'(灌展治療'禁忌'), 현재야필요준수적충분적가치(現在也必要遵守的充分的價値).

• Journal of the Korean Geographical Society
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• v.48 no.4
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• pp.557-574
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• 2013

The paper examines the recent criticism from various viewpoints on landscape research in 'New cultural geography' focusing on the representation and duplicity of landscape as one of the key theoretical basis of the landscape school. The paper argues that landscape theories in new cultural geography should be considered as what is constantly changing over time and composed of various theoretical and genealogical elements rather than internally homogeneous, fixed, and closed system of knowledge. Through the recent 'phenomenological turn' of geography, landscape researchers explores a possibility of alternative approach to the existing theories and methods, which is so called NRT(Non-representational theory). The research objectives of the paper is to examine the theoretical and practical implications of such significant criticisms, which put emphasis on the idea of landscape as performance and practice rather than landscape as representation in cultural geography.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.13 no.2
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• pp.95-101
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• 1999

The electron energy distributions function were analysed in sulIitur hexaflowide at E/N : 500~800(Td) for a case of non-equilibrium region in the nran electron energy. This papa- describes the electron transport characteristics in $ SF_6$ gas calculated for range of E/N values from 150~800(Td) by the Monte Carlo simulation and Boltzmann equation Irethod using a set of electron collision cross sectioos determined by the authors and the values of electron swarm parameters. The results gained that the value of an electron swarm parameter such as the electron drift velocity, the electron ionization or attachment coefficients, longitudinal and transverse diffusion coefficients agree with the experimental and theoretical for a range of E/N. The properties of electron avalanches in an electron energy non-equilibrium region.region.

• Journal of Korean Library and Information Science Society
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• v.37 no.1
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• pp.83-107
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• 2006

We share the critical mind about the decolonization of Library & Information Science(LIS) and Political Science in Korea. We did a bibliographical study on the decolonization discourse in the Political Science of Korea. Concretely, we traced the decolonization discourse of the scholars of the Political Science in Korea, and wrote their abstracts. Finally, this study provided the general view of their decolonization discourse. This study covers the decolonization discourse from 1945 to 2005. This bibliographical review may show the possibility of communication between LIS and social sciences in Korea, and can support the development of the decolonization discourse in the Political Science of Korea.