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태안마애삼존불의 보존과학적 훼손도 진단과 보존환경 분석
엄두성,전병규,한민수,이장존,송치영,Eom, Doo-Sung,Jun, Byung-Kyu,Han, Min-Su,Lee, Jang-Jon,Song, Chi-Young 국립문화재연구소 2008 保存科學硏究 Vol.29 No.-
Sam-jon-bul or Three Buddha Image Carved on rock surface which is called Sam-jon-bul in Taean, state-designated national treasure No. 307, made in Baek-je Period, has two Buddha images and one Bodhisattva. The detached part of the Sam-jon-bul from wall rock has been attached through conservation treatment in 1995. Few study has been done on weathering condition of petrological point of view and damage while the surface of the Sam-jon-bul has been under serious weathering (relief) of loosing stone particles, and discoloration. In this study, it was made weathering damage maps, which show physical property of the material and state of damage of Sam-jon-bul, in order to dialogize how far the weathering has been done. It has been considered continuing on-site monitoring as necessity when Sam-jon-bul was covered with dew, which may have been caused by change in weather in and out of the protect building. It is necessary to set up detailed conservation plan for it by doing regular diagnosis on the influence of the protect building and weathering of Sam-jon-bul.
안료 원료인 뇌성산 산출 뇌록의 소성에 따른 광물학적 특성 변화
이장존 ( Jang Jon Lee ),김재환 ( Jae Hwan Kim ),한민수 ( Min Su Han ) 한국광물학회 2018 광물과 암석 (J.Miner.Soc.Korea) Vol.31 No.1
뇌록은 조선시대 건축물의 바탕칠(가칠)에 사용된 녹색 안료이며, 불국사 대웅전 등 주요 건축물의 단청에 사용되었다. 본 연구에서는 한국 전통 안료 원료인 뇌록을 이용하여 소성온도에 따른 광물학적 특성 변화를 살펴보았다. 포항 뇌성산 일대에 국부적으로 산출하고 있는 뇌록은 주구성 광물이 셀라도나이트(celadonite)이며, 주요 구성 원소는 Fe, Si, K, Mg 등으로 주로 Fe가 풍부한 운모류임을 알 수 있다. 105℃~1000℃까지 단계적 소성실험 결과, 색상이 녹색 → 담녹색 → 갈색 → 적색으로 변하였으며, 열분석에서는 616℃ 부근에서 결정수의 탈수작용에 의한 흡열반응이 확인되었다. 광물의 변화는 600℃ 이상에서 결정면[(111), (021)]이 붕괴되고, 1000℃ 이상에서 철산화물이 형성되었다. 따라서 뇌록의 정출 온도가 600℃ 이하인 것으로 추정되며, 셀라도나이트만이 확인되는 것으로 보아 Stage I 단계만의 변질을 겪은 것으로 판단된다. Noerok ia a green pigment used in Joseon dynasty, and its main usage was for forming foundation layers of Dancheong, the ornamental paintings on the surface of traditional buildings in Korea, such as the Daeung-jeon(main hall) of Bulguk-sa temple. In this research, we investigated the mineralogical characteristic changes of Noerok, a traditional Korean pigment, depending on its firing temperature. The Noerok that we experimented on was mined from Noeseong Mountain, Pohang where it is locally reserved. The major composition mineral is Celadonite, and the main constituent elements are Fe, Si, K and Mg, that refers to the existence of Fe-rich mica. As a result of phased firing experiment from 105℃ to 1000℃, the color was changed from green to pale green, then to brown, and finally to red in order. In the thermal analysis, endothermic reaction induced by the dehydration of crystalline water was confirmed at around 616℃. In the mineralogical change, the crystal surface [(111) and (021)] of the mineral collapsed at temperatures above 600℃, and iron oxide was formed at 1000℃ or higher. Therefore, it is estimated that the crystallization temperature of Noerok is below 60 0℃, and it is also considered that it has undergone the alteration phase up to stage I, based on the presence of only a celadonite.
니하오? 국내 중국인 유학생의 한국 학생과의 교우관계 : 중국인 유학생의 경험과 인식
전재은,장나영 안암교육학회 2012 한국교육학연구 Vol.18 No.1
본 연구는 국내 중국인 유학생이 한국 학생과의 관계에 대하여 갖는 인식과 경험을 알아봄 으로써 교우관계에서 느끼는 어려움을 심층적으로 탐색하고자 하였다. 이를 위해 서울의 사 립대학 학부 과정에 재학 중인 중국인 유학생 20명을 대상으로 질적 면접을 실시하였다. 연 구결과 중국인 유학생의 한국 학생과의 교우 관계는 서로 단절되어 분리된 경향을 보였다. 중국인 유학생은 한국 학생들에 대하여 중국인 유학생을 냉담하고 목적 위주의 관계만을 선 호한다고 인식하였다. 거꾸로 중국인 유학생들은 한국인과 한국학생들이 본인들을 부정적으 로 바라본다고 인식하고, 그 이유는 양국 언론매체의 보도, 정치경제적 관계, 한국의 이문화 교육 등에 있다고 생각하였다. 본 연구는 이러한 연구 결과를 바탕으로 국내 대학의 외국인 유학생의 유치가 수치상으로는 성공적이나 학생들 간 분리되어 있는 현상을 지적하고, 앞으 로 외국인 유학생의 한국 학생과의 교우관계에 대한 지원을 통해 이들 학생들의 교육 및 사 회문화적 경험의 질을 높이는 대학 국제화가 필요함을 강조하였다. The purpose of this paper is to explore Chinese students’ difficulty and understanding of their relationship with Korean students. A total of 20 Chinese undergraduate students at a private university in Seoul were interviewed. Findings show that (1) Chinese students were separated from Korean students in their relationships; (2) Chinese students understood that Korean students were indifferent to Chinese students and pursue purposeful relationships with Chinese students; (3) Chinese students recognized that Korean students and people perceive China and Chinese people negatively, reasons including mass media in both China and Korea, political and economic relations between two countries, and lack of intercultural education in Korean education. This paper emphasizes the separation of Chinese students from Korean students despite the successful increase of international student population in Korean higher education, and concludes that international student recruitment and internationalization efforts in Korean higher education need to be directed toward facilitating relationships between Korean and international students, thereby promoting their quality of educational and sociocultural experience.
Bailey, Jon A.,Bhattacharya, Tanmoy,Gupta, Rajan,Jang, Yong-Chull,Lee, Weonjong,Leem, Jaehoon,Park, Sungwoo,Yoon, Boram,Della Morte, M.,Fritzsch, P.,Gá,miz Sá,nchez, E.,Pena Ruano, C. EDP Sciences 2018 The European Physical Journal Conferences Vol.175 No.-
<P>We present the first preliminary results for the semileptonic form factor <I>h</I><I>A</I>1 (<I>w</I> = 1)/<I>ρ</I><I>A</I><I>j</I> at zero recoil for the <I>B</I> → <I>D*l</I><I>v</I> decay using lattice QCD with four flavors of sea quarks. We use the HISQ staggered action for the light valence and sea quarks (the MILC HISQ configurations), and the Oktay-Kronfeld (OK) action for the heavy valence quarks.</P>
Bailey, Jon A.,Jang, Yong-Chull,Lee, Weonjong,Leem, Jaehoon,Della Morte, M.,Fritzsch, P.,Gá,miz Sá,nchez, E.,Pena Ruano, C. EDP Sciences 2018 The European Physical Journal Conferences Vol.175 No.-
<P>The CKM matrix element |<I>V</I><I>cb</I>| can be extracted by combining data from experiments with lattice QCD results for the semileptonic form factors for the <I>B̅</I> → <I>D(*)lv̅</I> decays. The Oktay-Kronfeld (OK) action was designed to reduce heavy-quark discretization errors to below 1%, or through O(λ<SUP>3</SUP>) in HQET power counting. Here we describe recent progress on bottom-to-charm currents improved to the same order in HQET as the OK action, and correct formerly reported results of our matching calculations, in which the operator basis was incomplete.</P>