젊은 성인의 고관절 발육부전증에 대한 2종 무명골 절골술의 경험 : 증례보고 Report of 3 Cases

문명상,우영균,정영복,제양환 대한고관절학회 1990 Hip and Pelvis Vol.2 No.1

회전근 개 파열 관절중에서 시행한 역구형 관절 치환술 : 2례 보고

문영래,이상홍,노경환 朝鮮大學校 附設 醫學硏究所 2009 The Medical Journal of Chosun University Vol.34 No.1

Morphine의 血漿 Corticosterone 增加作用에 미치는 副交感神經系藥物의 影響

文永煥,全普權,申萬鍊 고려대학교 의과대학 1987 고려대 의대 잡지 Vol.24 No.1

Buckingham suggested that the effects of opioid substances on CRF secretion are probably due partially to direct actions on the hypothatamus and partially to alterations in the activity of cholinergic and noradrenergic neurons in the central nervous system. In this paper, the influences of cholinergic and anticholinergic drugs on the morphine-induced increase of plasma corticotserone level was studied in male mice. The results obtained were summarized as follows; 1. The dose-dependent increasing effect of morphine on plasma corticosterone was significantly inhibited by naloxone. 2. Pilocarpine (0.1-2.0㎎/㎏), physostigmine(10-200㎍/㎏), carbachol(10-200㎍/), and nicotine(0.1-2.0㎎/㎏) induced the dose-dependent increase of plasma corticosterone level. Particularly, the increasing effect of physostigmine and carbachol was marked. 3. The increasing effect of morphine on plasma corticosterone was markedly enhanced by pilocarpine, physostigmine or carbachol and was slightly enhanced by nicotine. The combined effect of morphine with pilocarpine or nicotine showed a tendency to be strengthened by atropine. But the combined effect of morphine and physostigmine was little changed by atropine and the combined effect of morphine and carbachol was inclined to be decreased by atropine. 4. Atropine(1.0㎎/㎏)and hexamethonium(10㎎/㎏)induced the marked increase of plasma corticosterone level. But by the combined treatment of them, the plasma corticosterone level showed the initial marked increase followed by the abrupt decrease downward to the control level. The increase induced by the combined treatment of atropine or hexamethonium with morphine was rather lower than that induced by a single treatment of atropine or hexamethonium. These results suggest that the increasing effect of morphine on plasma corticosterone level is mediated rather by its direct action on hypothalamus and its indirect action on central noncholiergic neurones than by its action on central cholinergic neuronal function.

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.

Ni-Cr계 내열주강의 천이액상접합에 관한 연구

김환태,권영순,문진수 울산대학교 1997 공학연구논문집 Vol.28 No.2

본 연구에서는 MBF-50 삽입금속을 이용한 Ni-Cr주강(HP)의 천이액상접합시의 접합계면의 거동에 대해서 조사하였다. 접합은 진공분위기에서 1100℃∼1200℃의 온도 범위로 0∼60분 동안 행해졌으며 접합압력은 1MPa였다. 본 실험에서 얻어진 결과는 다음과 같다. 1) 1150℃에서 접합한 결과 반응층 내에는 Cr계 탄화물의 생성을 확인할 수 있었다. 2) 유지시간의 증가와 함께 등온응고는 매우 빠르게 일어나 20분 이내에 반응층이 거의 소멸되었으며 성분원소의 균일화도 거의 이루어진 상태였다. 3) 등온응고가 일어나기 이전의 접합부의 경도는 모재에 비해 높게 나타났으나, 유지시간이 증가하면서 균일화와 함께 반응층의 경도는 모재와 같게 나타났다. 4) 접합계면부의 각도를 달리하여 접합한 시편의 creep 특성을 조사한 결과 접합계면각도가 작을수록 creep 특성이 우수하게 나타났다. Transient liquid phase(TLP) bonding of Ni-Cr heat resisted casting alloy(HP) was investigated using of the insert metal MBF-50. TLP-bonding was carried out at 1100℃∼1200℃ for 0∼60min in vacuum atmosphere and bonding pressure was 1MPa. The results of this study are, 1) Microconstituents such as Cr-carbide were formed in the bonded interlayer. 2) Isothermal solidification process was very fast at the bonding temperature of 1150℃ with increasing bonding time, the reaction layer disappeared and homogenization was almost over at the bonding time of 20min. 3) The hardness of reaction layer was higher than that of base metal before isothermal solidification, as time increased the hardness was almost same as that of base metal with homogenization of chemical composition. 4) In case of sample with different bonding interface angle, the smaller bonding interface angle, the better creep property.

스퍼터된 [NiFe/Ag] 적층박막의 적층율에 따른 자기저항 변화

金永煥,朴允文,具燕秀 弘益大學校 科學技術硏究所 1998 科學技術硏究論文集 Vol.9 No.2

In this work, [NiFe/Ag]?? multilayers were deposited by magnetron sputtering method with NiFe and Ag targets. Before the deposition of multilayers, we investigated relationships between process parameters and deposition rate. Magnetoresistance(MR) is increased with increasing the annealing temperature, and it is expected to be affected by interfacial roughness on the basis of the analysis with XRD and AFM. High MR(3.7%) was found in [NiFe(30Å)/Ag(30Å)]?? Si(100) films in the case of increasing the interfacial area ratio of films. It was found that the maximum MR(4.2%) in [NiFe(35Å)/Ag(30Å)]?? Si(100) films when the thickness of NiFe layers was varied by 5Å respectively. Also, MR is increased as the stacking numbers of bilayer increased from 10 to 20.

실시간 GPS 차량의 주행자료를 이용한 링크통행시간 산정에 관한 연구

임채문,이영우,박영환 대구대학교 산업기술연구소 2003 産業技術硏究 Vol.14 No.3

Users of traffic information are demanding a wide range of real-time traffic information. However, the limitation in collecting real-time traffic information makes it difficult to analyze or provide the real-time traffic information. To improve the methods of collecting real-time traffic data, this research examines the possibility of collecting real-time traffic data using GPS. Real-time collection of traffic data is key to the production and provision of real-time traffic information. This research conducted real-time data collection using GPS-based RTK assessment to proceed with the study on link travel times. This research result showed that the patterns of going through traffic were divided up to 2 in the link travel times. The first pattern is the delay on the red ball at the downstream node before passing the link and the other is passing at the green ball without having to be held up by the red ball. Therefore, it will be more accurate to divide up the link travel time into the one involving delay and the other without delay, rather than using the average link travel time in terms of assessing the traffic situation.

천이액상접합시 액상기지내의 고상입자의 거동

김환태,권영순,문진수 울산대학교 1997 공학연구논문집 Vol.28 No.2

본 연구에서는 Mo와 Fe 모재에 대해 액상소결한 삽입금속을 사용한 천이액상접합에서의 등온응고과정과 등온응고시에 일어나는 액상기지내의 고상입자의 거동에 대해 조사하였다. Mo/Mo-Ni/Mo계의 접합에서 삽입금속중의 Ni의 확산에 의해 모재에서는 재결정이 일어남과 함께 zigzag 형태의 복잡한 입계를 형성하였다. Fe/Fe-B/Fe계의 접합에서 등온응고과정은 액상기지내의 고상입자의 성장과 함께 모재와 삽입금속 계면에서의 계면의 성장에 의해 지배되었으나, Fe/Fe-P/Fe계의 접합에서는 모재와 삽입금속 계면에서 계면의 우선적인 성장에 의해 지배되었다. This study evaluated behavior of solid particles at the bonded interlayer of joints and homogenization process during TLP bonding of Mo and pure Fe with a liquid phase sintered insert metal. From the experimental results, isothermal solidification process was different from that of traditional TLP bonding. Recrystallization in the Mo base metal due to diffusion of Ni and zigzag migration of solid particle's grain boundary according to strain energy were observed at the Mo/Mo-Ni/Mo joint. In TLP bonding of Fe/Fe-B/Fe system, isothermal solidification process was controlled by growth of solid particles and migration of solid-liquid interface at the bonded interlayer of joint. But in TLP bonding of Fe/Fe-P/Fe system, isothermal solidification process was controlled only by migration of solid-liquid interface at the bonded interlayer of joint.

規則的 反射條件으로 分類된 空間群

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.

자동차 변속기용 기어설계 프로그램 개발

김영환,박태조,문영재 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.-

A new interactive computer program for design and examination of the automobile transmission gear is developed. The design data of a shifted helical gear sets are calculated and the contact ratio and the strength condition are examined. The involute curve and a root fillet of the designed tooth profile are graphically presented, and the informations for tooth profile such as root point, weakest section point, etc. are obtained. The whole engaging gear shape and contact state are certificated in Autocad. To check the lubrication conditions, the minimum film thickness is calculated and compared with the surface roughness data. Therefore the computer program made in this paper gives more improved practical tool in designing a automobile gear set.