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Reciprocal Lattice Explorer의 原理와 使用法
徐日煥,李珍昊,秋錦洪,林星秀,柳保盈,朴晶蘭,金文執,趙素羅,金憲俊,李正秀,成百石 충남대학교 자연과학연구소 1993 忠南科學硏究誌 Vol.20 No.2
Reciprocal lattice explorer는 de Jong-Bouman camera와 Buerger precession camera를 合친것이다. 이 explorer를 使用하면 goniometer에 한번 固定한 試料를 使用하여 그 試料의 空間群을 決定하는데 必要한 모든 寫眞을 撮影할 수 있으며 그들은 찌그러지지 않은 逆格子面의 寫眞들이다. 本 論文에서는 de Jong-Bouman 과 Buerger precession 寫眞術의 原理와 使用法을 記述 하였고 또한 de Jong-Bouman의 振動寫眞과 zeroth layer 寫眞으로부터 11個 Laue群의 識別方法도 提示하였다. The reciprocal lattice explorer is an instrument which incorporates the principles of both the Buerger precession and the de Jong-Bouman methods. On the explorer all photographs which are necessary for a space group determination can be taken with a single setting of a crystal and the photographs show undistorted pictures of the reciprocal lattice planes. In this paper, the principles and the usages of the de Jong-Bouman and the Buerger precession photography are described, and a method of 11 Laue group identification using the de Jong-Bouman oscillation and zeroth layer photographs is shown.
徐日煥,金光柱,秋錦洪,李珍昊,林星秀,柳保盈,金文執 충남대학교 자연과학연구소 1992 忠南科學硏究誌 Vol.19 No.1
各 結晶格子는 230個 空間群 中 하나로 記述되는 對稱性을 가지고 있으며 그 結晶의 構造를 밝히기 爲하여는 그 結晶이 屬한 空間群을 반드시 알아야 한다. 이 論文에서는 230個 空間群을, 그 結晶이 가지고 있는 反射條件에 依하여 明白히 決定되는 空間群과 空間群間의 共通的인 反射條件 때문에 結晶의 構造가 밝혀진 後에야 밝혀지는 空間群으로 分類하여 놓았다. Every crystal lattice has a symmetry which is described by one of the 230 space groups and the space group of a crystal must be known in order to elucidate its structure. In this paper the 230 space groups are classified into two categories, i.e., the space groups that are explicitly determined by the reflection conditions the crystals have and the others that are determined only after the elucidation of the crystal structures because of the common systematic reflection conditions between the space groups.
振動寫眞과 Weissenberg 零層寫眞法으로 7個 結晶系와 11個 Laue群의 認知
徐日煥,秋錦洪,李珍昊,林星秀,柳保盈 충남대학교 자연과학연구소 1992 忠南科學硏究誌 Vol.19 No.2
As the function Ⅰ(hkl) of the X-ray intensity has a center of symmetry assuming anomalous scattering is negligible, Ⅰ(hkl) shows the symmetry of a centrosymmetric point group, i.e., a Laue group. The symmetry of each Laue group gives rise to its equivalent intensity relation, from which a scheme for identification of Laue group by means of oscillation and Weissenberg zeroth layer photographs has been obtained.
徐日煥,李正秀,李珍昊,秋錦洪,成百石,林星秀,柳保盈 충남대학교 자연과학연구소 1992 忠南科學硏究誌 Vol.19 No.2
三斜晶系에는 2個의 空間群이 있고 單斜晶系에는 13個의 空間群이 있다. 本 論解에서는 이 空間群들을 誘導한후 各 空間群에 屬한 一般位置, 原點移動, 特殊座標 및 反射條件들을 說明 하였다. There are two and thirteen space groups in triclinic and monoclinic systems respectively. After derivation of the space groups, the general coordinates, the special coordinates and the reflection conditions of each space group have been discussed and change of origin of certain space groups is also shown.
농촌경관 중요요소의 조작을 통한 경관평가 : 농촌 문화마을을 대상으로 The case of Rural Culture Village
서주환,심성보,전영임,박태희,조영배 경희대학교 부설 디자인연구원 2002 예술· 디자인학연구 Vol.5 No.1
This study does questionnaire over recognition of landscape, major landscape and impressive site in rural community, and research visual preference through precessing pictures with a computer about major landscape. The landscape with natural fabric generally harmonizing with background is high in preference. Also, though major landscape factors are similar, preference is different according to shape, size, quality and color.
徐日煥,金光柱,秋錦洪,李珍昊,林星秀,柳保盈,金文執 충남대학교 자연과학연구소 1992 忠南科學硏究誌 Vol.19 No.1
한 結晶의 構造는 唯一單位의 X-線 回折强度資料로부터 決定될 수 있다. Miller指數(hkl)의 函數인 回折强度Ⅰ(hkl)는 異常 散亂(anomalous scattering)이 無視될때 對稱中心點群 卽 Laue群의 對稱性을 나타낸다. 이 論文에서는 모든 結晶系에 對한 回折强度의 唯一單位를 Laue群들의 對稱性으로부터 誘導하여 놓았다. Crystal structures can be determined from the unique data of X-ray intensity. As the X-ray intensity Ⅰ(hkl), which is a function of diffraction plane (hkl), has a center of symmetry assuming anomalous scattering is negligible Ⅰ(hkl) shows the symmetry of a centrosymmetric point group, i.e., a Laue group. In this paper the unique data of the intensity for all crystal systems have been derived from the symmetries of Laue groups.
徐日煥,秋錦洪,李珍昊,林星秀,柳保盈,朴晶蘭,金憲俊,成百石,李正秀,金文執 충남대학교 자연과학연구소 1993 忠南科學硏究誌 Vol.20 No.1
The multiplicity factor, which may be defined as the number of different planes in a form having identical interplanar spacing and identical intensity, is tabulated here for eleven Laue groups on the basis of their symmetries.
서주환,이준근,심성보,전영임 경희대학교 디자인연구원 2004 예술· 디자인학연구 Vol.7 No.1
The cultural interchanges have been dramatically increased between Korea and China since the diplomatic agreement on the 24th of August, 1992, Among the several discussions between the two countries, particularly building up Korea traditional garden will take concrete shape in Kwan-dong in China. These followings are the basic plans. First, the project approaches the garden as a place for the interchange and the cooperation between the counties, and where people can experience Korea traditional garden. Secondly, it is plotted to express the distinct character and originality of Korea traditional garden. Third, it applies the same materials, subject matters and the same construction method of Korea traditional garden. We can use the most similar materials if it is not possible. Fourth, the project is plotted to make the efficient use of the land form to decrease the damage of natural environment.