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      • KCI등재

        수직 단축성을 갖는 반공간 유전체 표면에서 VV, HV, VH 문제의 시간영역 해

        이원석,남상욱,Lihh Won-Seok,Nam Sang-Wook 한국전자파학회 2005 한국전자파학회논문지 Vol.16 No.12

        Theoretical investigation is made on the electromagnetic fields generated by an impulsive point current source, fur the VV, HV, and VH problems at the interface between an isotropic upper half-space medium and a normally uniaxial lower half-space medium. The electric fields of these problems are associated only with the extraordinary-wave components in the Fourier-Laplace domain. Applying the Cagniard-de Hoop method to each problem, the time-domain solutions of the wave fields are obtained. The fields of the VV case can be expressed in explicit(integral-free) forms. The fields of the HV and VH cases are not integral-free, but the major singularities implicit in the integral solutions can be analytically extracted. The interfacial far fields in the frequency domain are determined by the singularities in the time domain.

      • KCI등재

        입학사정관전형의 비학업성적영역 평가에 관한 연구:선도대학의 사례를 중심으로

        이원석 고려대학교 교육문제연구소 2015 敎育問題硏究 Vol.28 No.2

        본 논문은 입학사정관전형의 비학업성적영역의 평가가 실제로 어떻게 이루어지고 있는지를 선도대학의 사례를 중심으로 살펴보았다. 이를 위해 심층면접과 문헌 분석의 질적 연구 방법이 활용되었다. 연구 결과로 입학사정관전형의 전형 방법, 평가 요소, 평가 방법을 유형화하였고, 비학업성적영역 평가의 특징으로 종합적 평가, 정성적 평가, 평가요소별 평가자료 목록의 마련, 구체적 평가 방법의 비공개 등 을 도출하였다. 아울러 본 연구는 비학업성적영역 평가와 입학사정관제의 안착을 위해 전형 요소 및 전형 방법의 구체적 내용에 대한 공개, 입학사정관전형의 주요 용어에 대한 통일, 입학사정관의 평가 전문성 제고, 비학업성적영역 평가와 대학의 인재상과의 구체적 연결, 비학업성적영역의 평가에 대한 사회적 공감대 형성을 제안하였다 This study investigates the evaluation of the non-scholastic achievement areas of applicants in college admissions officer system in Korea. In order to do this, the study uses qualitative methods, that is, interviews with college admissions officers and document analysis with various admissions documents. Through the analysis of data the study provides the types of admissions screening, evaluation factors, and evaluation methods in college admissions officer system. In conclusion, the study indicated that holistic approach, qualitative evaluation, the establishment of data lists for assessing applicants’ abilities and the nondisclosure of screening process are listed as the characteristics of the evaluation of the non-scholastic achievement areas of applicants. Also, the study suggests that the formation of social consensus over the non-scholastic achievement areas of applicants arefundamentally important for the settlement of college admissions officer system in Korea.

      • KCI등재SCOPUS

        2D 배열형 초음파 트랜스듀서의 설계 및 제작

        이원석,우정동,노용래,Lee, Wonseok,Woo, Jeongdong,Roh, Yongrae 한국음향학회 2013 한국음향학회지 Vol.32 No.5

        In this paper, a $48{\times}64$ channel 2D array ultrasonic transducer with piezoelectric single crystals was designed, fabricated, and evaluated. Structure of the transducer was chosen to facilitate the electric connection on the planar array, and then components were fabricated in accordance with the structure. Detailed structure of the transducer was designed through finite element analyses. In order to improve the performance of the transducer, the crosstalk between adjacent elements was reduced through the control of kerf width and material, and the target frequency bandwidth was achieved through optimal design of the thickness of the single crystal and matching layers. After fabricating a prototype of the transducer according to the design and measuring its characteristics, the results were compared with those of finite element analyses to evaluate the performance of the developed transducer.

      • KCI등재

        정신분열병의 CDH2 유전자 다형성

        이원석,김미경,정한용,우성일,권영준,김종우,이희제,Lee, Won Seok,Kim, Mi Kyung,Jung, Han Yong,Woo, Sung Il,Kwon, Young Joon,Kim, Jong Woo,Lee, Hee Je 대한생물정신의학회 2005 생물정신의학 Vol.12 No.1

        Objective:There has been increasing evidence that neurodevelopmental dysfunction is involved in the pathophysiology of schizophrenia. Cadherin is known to be one of the important molecules in neurodevelopment. This study was performed to examine the relationship between T816C polymorphism of CDH2 gene and schizophrenia. Methods:Genoytypes of T816C polymorphism of CDH2 gene were analyzed by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) in 156 Korea patents with schizophrenia and 170 controls. Results:No difference was found between the patients with schizophrenia and the controls in genotype and allele frequencies of T816C polymorphism of CDH2 gene. Conclusion:The results of this study do not support an association between T816C polymorphism of CDH2 gene and schizophrenia. However, it is necessary to investigate other polymorphic regions of CDH2 in schizophrenia.

      • KCI등재
      • KCI등재

        탄허스님의 유가적 경세사상

        이원석 한국불교학회 2020 韓國佛敎學 Vol.93 No.-

        This paper aims to review the Confucian Governing Thought of Tan-heo. His idea of the Governing Thought was formed when he was a teenager due to the tradition of Confucianism in his family and the influence of his father and was massively released after the New Avatamska Sutra Treatise was translated and published by him in 1975. His thought reflected the criticism of the ruling ideology of the world and the view of the future of Korea against the background of the development of material civilization and the defeat of ethics and morality. Tan-heo emphasized the Confucian practice of ethics, morality, etiquette, and moderation, especially thinking highly of the Great filial piety and the Utmost filial piety, which are regarded by him as the core of religion, and integrating the harmony of filial piety and loyalty to them. This was the foundation for the cultivation of morally talented people in the combination of Confucian virtue and the theory of Jeongyeok ( 正易 ) . In addition, as Confucius did, Tan-heo initiated education projects and practiced the principles of ‘being not ashamed to inquire of those beneath one’ and ‘no limits to learning’ until entering Nirvana. He strongly encouraged his disciples to study and learn and concentrated his efforts enthusiastically to foster talented people regardless of monks, laity, men, and women. This was his elite education system aiming to educate moral talent awakening to ‘Dao’ and ‘One’. Tan-heo interpreted the idealistic Royal Politics of China’s ancient times as a true democracy based on people-oriented ideas, benevolent government, equal distribution, and humanistic politics. Furthermore, he proposed a welfare society in which material is harmonized with religion and spirit. This was also supported by the theory of Jeongyeok. In particular, it is noteworthy to integrate academics/education with religion’s emphasis on politics. This is reflected in the development of Buddhism, the self-regard as a National teacher, the reorganization of curriculum and teaching materials, and moral talents taken as practical leaders toward an eastern ideal society. Finally, he pursued an ideal society based on the integrity of Confucianism, Buddhism, and Daoism. his Confucian Governing Thought could not but fail due to various limitations, but provided a foundation for related thoughts. Especially, it is highly meaningful that Tan-heo suggested not only educational thoughts from the perspective of Confucianism but also from political/social ideas, in his status as a modern high priest of Buddhism. 본고는 탄허스님의 유가적 경세사상을 고찰한 것이다. 집안의 유학 전통과 부친의 영향으로 10대 중반부터 형성된 그의 경세사상은 1975년 신화엄경합론 의 출판을 계기로 대거 발표되었다. 이는 물질문명의 발달과 윤리·도덕의 패퇴를 배경으로 세계적 지배이념의 비판과 한국의 미래 비전이 결합된 것이었다. 탄허는, 유가적 윤리·도덕·예의·절도 등의 실천을 중시하였고, 특히 종교의 핵심인 효행을 대효(大孝)나 달효(達孝)로 높여 충효일치와 통합하였다. 이는 정역 관과 회통하여 도의적 인재의 배양으로 나아가는 토대였다. 또한, 공자처럼 교육 사업을 발원하고 입적할 때까지 불치하문(不恥下問)과 학해무변(學海無邊)을 실천 하였다. 제자들에게도 공부와 학문을 강권하였고, 승속·남녀를 불문한 인재양성에 주력하였다. 그 방법은 엘리트 교육이고, 그 목표는 도(道)·일(一)마저 각파(覺破) 한 도의적 인재였다. 탄허스님은 중국 상고 제왕의 이상적 왕도정치를 인정(仁政)과 덕치, 균분(均 分)과 민본적 천하공의(天下公議), 『정역』에 근거하여 진정한 민주주의로 해석하 고, 종교나 정신으로 물질을 조화한 복지사회를 상정하였다. 그는, 이런 민주사회가 1980년대에 실현될 것으로 확신하였다. 그가 정치를 강조하며 학술·교육과 종교를 합일한 것은 유가적 논리로 매우 주목된다. 이는 불교의 발전이나 제자사 (帝者師, 國師)의 자임(自任), 교과과정과 교재의 개편, 도의적 인재를 실질적 리더로 삼아 삼교회통적 이상사회를 건설하는 등에 반영되었다. 그의 유가적 경세사상은 여러 한계로 실패하였지만 경세사상 전반의 기틀을 제공하였다. 특히 탄허가 현대의 고승으로써 유가적 교육사상, 나아가 정치사회사상을 제시한 것은 의의가 적지 않다.

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