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석병석(Suk, Byong-suk),민승용(Min, Seung-yong),권재욱(Kwon, Jae-wook),김창균(Kim, Chang-kyoon),문상만(Moon, Sang-man),최수진(Choi, Su-jin),구철회(Koo, Cheol-hea),김인규(Kim, In-kyu),류동영(Ryu, Dong-young) 한국항공우주연구원 2015 항공우주산업기술동향 Vol.13 No.2
시험용 달 궤도선의 발사 요구조건 사전 분석 단계로 최근 외국에서 발사한 달 탐사선의 발사 요구조건을 분석하였다. 일반적으로 달 탐사선의 발사 요구조건은 달 임무 궤도를 결정하는 중요한 요소이며, 또한 지구, 달, 태양의 상대적인 운동으로 인해 임무궤도 요구조건을 만족하는 발사 가능 시간이 주기적으로 반복되는 경향이 있다. 분석 결과 설정된 발사 요구조건들로부터 달 궤도선의 주 임무가 달의 남/북극 지역의 광학 관측 임을 간접적으로 알 수 있었다. 향후 우리나라 달 궤도선 발사 요구 조건 설정에 본 논문이 도움이 되길 기대한다. In the preliminary study on launch window requirement for Korea Path-finder Lunar Orbiter(KPLO), the recent foreign lunar orbiter’s lauch window requirement was analyzed. Normally, the launch requirements depends on the mission orbit. Based on the relationship between Moon, Earth, and Sun, the launch time will be available periodically to meet requirements. In this paper, it is understood that the launch window requirements come from payload mission requirements to take picture each poles of Moon. This paper might be a practical example to derive KPLO launch requirements in the future.
3차원 뇌자기공명영상을 이용한 강박증의 뇌형태학적 연구
공석원,송인창,한문희,장기현,류인균,권준수 대한신경정신의학회 2000 신경정신의학 Vol.39 No.6
연구 목적 : 강박증의 생물학적 원인으로 전두엽-선조체 회로의 이상이 알려져 있다. 그러나 형태학적 뇌영상을 이용한 기존의 연구는 전두엽과 미상핵의 용적 변화에 대한 일관된 결과가 없었다. 따라서 본 연구에서는 선형변환을 통한 반자동화된 방법을 이용하여 뇌의 각부위에 대한 형태학적 연구를 위하여 시행되었다. 방 법 : DSM-IV의 기준에 의해 진단한 13명의 강박증 환자와 9명의 정상대조군을 대상으로 하였다. 3차원 뇌자기공명영상을 Spoiled gradient-recalled(SPGR)법으로 얻었다. 3차원으로 재구성된 뇌자기공명영상을 Talairach와 Tournoux의 표준화 좌표에 공간적 정위시킨 후 회질과 백직을 반자동화된 방법으로 분리하였다. 죄표에 의거한 뇌엽의 각 부위에 대한 용적 측정을 하고, 미상핵은 수기로 구획한 후 용적측정을 하였다. 전두엽은 Brodman 의 영역에 의거하여 좌표계에 따른 분할을 하여 배외측전두엽, 안와전두엽, 내측전두엽으로 분할 구획하여 용적을 측정하였다. 결 과 : 강박증군에서 전두엽 회질의 용적이 증가되는 경향을 나타내었다. 다른 부위의 회질과 백질 그리고 미상핵의 용적은 차이가 없었다. 편측성에 의한 차이도 없었으며, 임상적 심각도와 상관관계는 관찰되지 않았다. 결 론 : 본 연구에서는 강박증군에서 전두엽의 용적 증가를 관찰할 수 있었으며, 이것은 기존 연구 중 일부에서 전두엽과 미상핵의 용적 감소를 보고했던 것과 차이가 있다. 강박증이 만성화되고 일정기간 이상이지나 구조적 변화가 오기 전까지 오히려 대사와 혈류 증가에 따른 회질 용적 증가가 관찰되는 것이라 생각된다. Objectives: Neurobiological models for obsessive-compulsive disorder(OCD) have consistently Implicated prefrontal-striatal circuits in the pathophysiology of this disorder. But, prior studies have inconsistently found alteration in caudate and frontal lobe volumes in patients with OCD. This study was undertaken in the hope that semi-automated linear transformation methods would elucidate the morphometric differences of various parts of brain between OCD and normal control group. Methods : Thirteen parients meeting the DSM-IV criteria fro OCD, and 9 psychiatrically normal comparison subjects participated in the study. 3-D brain MRIs using Spoiled gradient-recalled(SPGR) sequence were acquired for each subjects. After spatially normalized according to Talairach and Tournoux's coordinates, the gray and white matters were segmented by semi-automated methods using fuzzy algorithm. Each lobal volumes was measured according to Talairach and Tournoux's coordinates, and the region of interests of caudate nuclei was manually traced. The frontal lobe was divided into 3 subregions ; dorsolateral prefrontal cortex, orbital frontal cortex, mesial frontal cortex accoring to the coordinates and Broadman's cytoarchitectonics. Results : Only the volume of left and right frontal gray matter showed a significant difference between OCD and normal subjects. In OCD, the frontal gray matter volume was increased in tendency. There's no difference in laterality and no coorelation with clinical severities. Conclusion : Findings of increased frontal gray matter volumes in patients implicate a structural abnormality of these brain regions in the pathophysiology of OCD. The increased frontl gray matter volumes reflect a epiphenomena due to increased cerebral blood flows and metabolic rates before the structural changes may occur.
이문균(Moon Kyoon Lee) 한국기독교학회 2011 한국기독교신학논총 Vol.74 No.-
Preaching serves to help the congregation recognize a new world of God and live according to the new possibility. Thus for preaching, knowing how to deliver a message rhetorically is more important than knowing what to speak. A preacher has to nurture his/her ability to select a theologically appropriate word and arrange the word effectively in his preaching. Like a poet, a preacher should be a master of language. A preacher has to mold ordinary language into a word of faith, while building a beautiful new world for the people listening to his/her preaching. This paper focuses on what a preacher can learn from poetry. Poets and preachers alike capture being. Both reveal that being and help people to both encounter and respond to a reality. Through their use of language, preachers and poets help people to see what they could not see before and what they only knew vaguely. Poems move people and force them to imagine something, rather than arguing for and explaining that thing. Similarly, preaching moves people and helps them to envision and imagine something of God, rather than defining and arguing for it. A preacher has to use language to show the congregation what they could not see before. He/She has to see something from the perspective of a poet. The preacher needs to learn how to see something anew through the poet`s language, rather than relying on stereotyped notions of the knowledge of faith. Specifically, a preacher in the postmodern world should have the sensibility of a poet. He/She has to show the congregation an alternative world, which God invites people to enter, on the basis of the Gospel, avoiding argumentation based upon orthodoxy. In this regard, he/she can speak in a new language, that is, a language that is characterized by an abundance of imagination. A preacher should display the power of the Gospel by the means of poetic language. A preacher should read poetry and hold a poetic sensibility. A preacher should be a poet.