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徐日煥,秋錦洪,李珍昊,朴晶蘭,郭相姬,金文執,李正秀,申容賢 충남대학교 자연과학연구소 1994 忠南科學硏究誌 Vol.21 No.2
32개 點群은 中心對稱(centrosymmetric)을 갖는 11가지 點群(Laue群)과 21個의 非對稱中心(noncentrosymmetric)點群으로 이루어졌다. 本 硏究에서는 21個 非對稱中心點群 各各의 等價回折面(等價逆格子點)들을 誘導하였다. The thirty two point groups consist of eleven Laue groups (centrosymmetric point groups) and twenty one noncentrosymmteric point groups. In this paper, the reciprocal lattice points equivalent under the operations of 21 noncentrosymmetric point groups are derived.
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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.
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서정세,김형수 慶尙大學校生産技術硏究所 1997 生産技術硏究所論文集 Vol.13 No.-
The experiments were performed in a high temperature furnace to examine the effects of the temperature difference between the single round jet and the surrounding fluid on the characteristics of impinging heat transfer. It was found that the average heat transfer coefficient increased in proportion to 1.5th power of the jet velocity, which was higher than that of previous measurements in which the jet temperature was the same as the ambient temperature. since the jet is thermally mixed with its surroundings, the heat transfer increases as the nozzle-to-surface distance decreases. The maximum average heat transfer occurred at the nozzle-to-surface distance normalized by the nozzle diameter.
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徐廷守 梨花女子大學校 醫科大學 醫科學硏究所 1991 EMJ (Ewha medical journal) Vol.14 No.4
Feeding gastrostomy is a popular alternative in patients with swallowing difficulty. Many of theses patients are high anesthetic risk. Nonoperative percutaneous gastrostomy is a simple and safe precedure, and appear promising as alternatives for enteric alimentation. The auther performed 26 cases of percutaneous gastrostomy from June 1987 to April 1991 at Ewha Womans University Hospital. The underlying diseases of the patients were esophageal cancer(14 cases). CNS disease(10 cases) and lung cancer(2 case). Seldinger method was used in all cases. The general condition improved in all patients, and there were no serious complications. Gastrostomy tubes were patent in all patients during their survival period, and easily changeable to a larger bore tubes.
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Four-circle Diffractometer를 이용한 결정방위행렬과 단위포상수 결정
서일환,이진호,심해섭,이정수,성백석,이창희,김문집 순천향대학교 기초과학연구소 1999 순천향자연과학연구 논문집 Vol.5 No.2
A theoretical process to determine the unit cell parameters a, b, c, , β, γ of single crystals and then to collect intensities of ?? using four-circle diffractometer has been shown.
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ASYMUNT: 21개 Noncentric 점군이 갖는 X선 데이터의 asymmetric Units
서일환,박정란,박영수,이진호,이창희,김문집 순천향대학교 기초과학연구소 1999 순천향자연과학연구 논문집 Vol.5 No.2
결정학적 가설 ??은 anomalous dispersion을 나타내는 원자를 갖고있는 비대칭 결정에 대해서는 성립하지 않는다. 만약 이들의 결정구조가 Lane group 보다는 오히려 noncentric point group의 X선 강도 데이터의 asymmetric unit로부터 정해질 수 있다면, 그 구조는 강도 데이터가 2배로 증가하기 때문에 보다 신뢰성이 증가한다. 본 논문에서는, 21개 noncentric point group 각각에 들어가는 강도 데이터의 asymmetric unit 의 정확한 범위를 계산하는 프로그램을 제안하였다.
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서정수 梨花女子大學校 醫科大學 醫科學硏究所 1995 EMJ (Ewha medical journal) Vol.18 No.4
목 적 : 경피적 세침 흡인 생검술은 인체부위 어느 병소나 안전하며 간편하게 정확한 진단을 얻을 수 있어 보편적으로시행되고 있는 진단방법이다. 이에 저자가 174예의 미세침을 이용한 영상유도하의 경피적 생검에 대하여 그 진단적 정확도와 임상적 유용성을 알아 보고자 한다. 대상 및 방법 : 투시 및 초음파 유도하에서 174예의 생검을 시행하였으며 생검의 부위로는 흉부 82예, 종격동 3예, 간 55예, 췌장 10예, 복강내 6예, 후복막강내 4예, 경부 10예, 갑상선 2예, 신장 1예, 유방 1예였다. 천자는 Westcott 검침22G와 23G를 사용하였고 생검결과는 수술, 객담검사, 다른부위의 생검결과, 그리고 환자의 임상 경과와 비교 분석하였다. 결과 : 174예의 생검중 170예(97.7%)에서 병리조직학적 진단을 내릴 수 있는 조직을 얻었다. 이들 중 127예가 악성질환 이었으며 47예가 양성질환이었다. 생검의 정확도는 악성질환에서 96%, 양성질환에서 100%였으머 간에서는100%, 전체적으로는 98%였다. 합병증은 10예(5.8%)에서 발생하였다. 기흉과 일시적인 각혈이 있었으나 심각한합병증은 없었다. Purpose : Percutaneous biopsy is the most frequent interventional radiologic procedure. Itsincreased use is related to new imaging technique facilitating needle placement, greater safety offine needle and advances in cytology. Over a period of recent 3 years, 174 cases who underwent percutaneous needle aspiration and biopsy were analyzed. Materials and Methods : 174 biopsies under fluoroscopic or ultrasonic guidance were performed. Various anatormic sites were targeted, chest 82, liver 55, neck 10, pancreas 10, intraabdominal 6, retrperitoneal 4, thyroid 2, kidney 1, breast 1. Results : Obtained cytologic specimen and tissue were diagnostic in 170 of the 174 biopsies(97.7%). 4 biopsies yielded inadequate or were composed of necrotic debris. The overall accuracy for both suspected malignant and infectious diseases were 98%. The diagnosis weremalignancy in 127 biopsies and benign disease in 47 biopsies. No complications other thanpneumothorax(7 cases ; 4.1%) and a transient hemoptysis(3 cases : 17%) was observed in 10cases(5.8%). Conclusion : The author obtained extremely high diagnostic accuracy of malignant andbeign or inflammatory lesions using percutaneous fine needle aspiration biopsy without seriouscomplirations. It is a valuabel diagnostic methd in the lesion of the body at any location.
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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.
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서정수 梨花女子大學校 醫科大學 醫科學硏究所 1991 EMJ (Ewha medical journal) Vol.14 No.3
Although cholelithiasis is a common biliary disease, it is little known about its prevalence in asymptomatic population samples. Real-time ultrasonography was done with 2639 subjects for healthy screening at Ewha Womans University Hospital. The results were as follows: 1) Among 2639 subjects, the asymptomatic cholelithiasis were found in 88 cases(3.3%). 2) The age ranged from 25 to 87 years. The highest incidence was found in 7th(36.3%) and 6th(29.5%) decades. The prevalence of the male was 3.8%, and female 2.8%. The sex ratio was 1:0.76 3) Among the 88 cases with gallstones, most of them are single in number(51.1%), and small in size(less than 1.0㎝. 55.7%).
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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.
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