플라즈마 표지소자의 제작

이상윤,라병욱,박동수,황인헌,이덕동,신영남,박성배,이동욱,박용석,박형근,손상호,권태근,채경락,정경득 慶北大學校 自然科學大學 1986 自然科學論文集 Vol.4 No.-

An Ac-type Plasma Display Panel (PDP) operating with Ne-Ar(0.1%) Penning mixture gas is fabicated. The characterics of the panel with electrodes covered with thin and thick dielectric layers are studied. The brightness of the Neon-orange light emitted by the panel measured as function of applied voltage and frequency. As an application, a graphic display system equipped with PDP showing still and moving pictures is made.

원통 연삭에서 가공 능률 향상을 위한 연삭 저항의 측정에 관한 연구

김원일,이진,이윤경,왕덕현,이상복,이관철,문원길 경남대학교 공업기술연구소 2000 硏究論文集 Vol.18 No.-

본 연구에서는 원통 연삭 가공에서 가공 능률 향상을 위한 연삭 저항을 측정하고자 연삭 가공 중에 발생하는 연삭 저항의 추이를 확인하였고 다음과 같은 결과를 얻었다. 숫돌과 공작물간의 연삭 강성은 공작 속도의 증가에 따라 지지계의 강성이 높은 경우 증가하였고 절삭 깊이와 연삭 숫돌의 속도에는 연삭 강성이 감소하는 경향을 보였다. 또한 총합 강성은 공작 속도, 절삭 깊이 및 연삭 숫돌의 속도 증가에 따라 지지계의 강성이 높을 수록 증가하였다. 연삭기의 강성 변형과 가공 능률에 영향을 주는 값으로 연삭 강성비는 지지계의 강성이 높을 수록 감소하였다. In this study, the measurement of grinding resistance to improve grinding efficiency in cylindrical grinding was studied and the following conclusions could be obtained. Relation grinding wheel and workpiece, grinding stiffness increases according to increase of work speed for high machine stiffness and decreases depth of cut and grinding wheel speed. Also, resultant stiffness increases high machine stiffness according to increase work speed, depth of cut and grinding wheel speed. The values of the effect stiffness deflection in grinding machine, grinding stiffness ratio decrease according to high machine stiffness.

위절제술 환자의 표준진료지침 개발 및 적용 효과

김은희,김철규,이순교,김순덕,이혜옥,권정순,이경미,이민미,심순미,유용만,신종식,강은희,이상일,김병식,오성태,육정환,박수길 한국의료QA학회 2003 한국의료질향상학회지 Vol.10 No.2

Background : Gastric cancer is the most common malignant tumor in Korea. surgical operation is one of the major treatment modalities for gastric cancer patients. Therefore, gastrectomy is one of the most common procedures in General Surgery. There were variation in length of hospital stay and medical treatment for gastrectomy between three surgeons at Asan Medical Center. Clinical pathways have received considerable attention as a tool for recucing the medical practice variation, increasing the efficiency of care process, and improving the quality of care. The aim of this study was to evaluate the effect of a clinical pathway for gastrectomy in gastric cancer patients. Methods : The clinical pathway for gastrectomy was developed and implemented by a multidisciplinary group in Asan Medical Center. A computerized clinical pathway program was developed and revised after a pilot test. A total of 145 patients underwent gastrectomy by three surgeons at Asan Medical Center. We compared the length of hospital stay, patient satisfaction, and unplanned readmission rate between the pre-pathway group(n=67) and the post-pathway group(n=78). We also investigated the degree of satisfaction among the physicians and nurses who were main end-users of the clinical pathway. Results : The clinical pathway was applied to all target patients. The average length of hospital stay was shortened from 12.7days to 10.6days(p<0.01). The degree of patient satisfaction with the care process changed from 90.3% to 89.2% after the implementation of the clinical pathway, but the difference was of satistically significant(p=0.761). Unplanned readmission rate was 2.9% in the pre-pathway group. More than 90% of physicians and nurses answered that the clinical pathway had been a useful tool in their medical practice. Conclusions : The findings of the study demonstrated that implementation of the clinical pathway for gastrectomy produced substantial reduction in the length of hospital stay while improving the quality of patient outcomes. The computerized clinical pathway program can be used as one of the powerful patient management tools for reducing the practice variations and increasing the efficiency of care process in Korea hospital settings.

DMBA 투여후 랫트의 조혈기능에 미치는 녹용의 영향에 대한 연구

이상목,김찬규,이덕윤 건국대학교 생명과학연구원 1995 생명과학지 Vol.2 No.1995

정보화시대와 韓 ·日 經濟協力

이상덕,이종윤 韓日經商學會 1996 韓日經商論集 Vol.12 No.-

本 硏究は, 韓日兩國における經濟協力とくに技術協力を圓滑に進行するのに必要な社會的基盤について情報社會という側面から考察するにことこする. このため, まず韓日企業間の最近の動きについて調べることにする. 次は, 前の分析はどを參考にしながらにれからの韓日經濟協力の基本方向を考える. こるから韓日間の經濟協力を考える察, 情報通信ネットワ - クの役割により,いももでの制約要因であった時間, 空間及び距離の問題が大きく改善できる. いれいよって韓日の企業間コミユニケ-シヨソ環境がよくなるし,このような變化はこれからの韓日關係の新しい 視点をあたえてくれると思う.

銅과 第二酸化銅의 K 吸收端構造

李悳源,沈相俊 成均館大學校 1980 論文集 Vol.28 No.-

Cauchois type으로 배열된 Single crystal Spectrometer를 사용하여 Cu와 CuO의 K 吸收端의 構造를 조사했다. Cu에 대한 CuO의 K 吸收端의 변위를 測定했으며 그 결과를 諸硏究者들의 실험치 및 이론치와 비교하였다. CuO의 K 吸收端 및 그 微細構造는 Cu의 K 吸收端의 短波長領城으로 약 4eV만큼 변위돼 나타났고 A.H. Barnes의 結果인 3.7eV와는 비교적 양호한 一致를 보인다. The K-absorption edge of copper and copper oxide were examined by the single crystal spectrometer which was arranged by the Cauchois type. The extended fine structures of copper were compared with the theoretical and the experimental values of the others. The shifts of K-absorption edge from copper to copper oxide was measured and compared with the experimental value of A.H. Barnes. The shift of k-absorption edge of copper Oxicle which was found on the short wavelength side from k-absorption edge of copper was about 4eV in energy.

實驗大學 實施에 따른 師範大學 學生實態

李相魯,林在圭,吳岱燮,閔庚德 慶北大學校 師範大學 1977 敎育硏究誌 Vol.19 No.-

The purposes of this study were (1) to analyze students' reasons, for applying to the Teachers College, department and major; (2) to assess the degree of satisfaction on being assigned to their particular department; (3) to investigate their attitudes toward the new way of assigning students in terms of two broadly classified majors i.e., studies of humanistic and social sciences and studies of natural sciences; (4) to estimate the degree of fulfillment of student desire and degree of utility of physical facilities; and (5) to identify reasons of success or failure of the students in the respective departments they were assigned to. The subjects were 2 groups of Teachers College students, one group which entered the university in 1976 and the other in 1977. In order to collect data pertaining to students' opinions or attitudes, questioniares were used; the score on college entrance exam and grade point average were obtained from individual student reports. The data were statistically analyzed by means of either Z or chi-test. The major findings were as follows: 1. Approximately 41 percent of the freshmen of the Teachers College reported that they decided to enter the Teachers College in order to be teachers. 2. Approximately 70 percent of the Teachers College students decided their particular major by themselves rather than by suggestions or advices. 3. The degree of satisfaction on having entered the Teachers College was relatively high, since the average scale point was .472. 4. The fresh students showed a significant decrease in their positive attitude toward the new way of assigning the students to the department or majors. The average scale point of the students in 1975 was .276; that of in 1976 was .489; that of the students in 1977 was .077. When the changes in attitude toward the new way of assigning students to departments or majors were estimated, it was observed that the degree of those in favor was .489 at the beginning of the first semester, and-.677 at the end of the second semester. However, the degree of satisfaction reported by students after they were assigned to a specific department or major was .732. Therefore, the negative attitude toward the new way of assigning could be interpreted as a reflection of students' anxiety status of rather than an attitude against the new way of assigning the students.

객체지향 메소드의 확장 구성 및 변환에 관한 연구

李德世,李相文 忠州大學校 1995 한국교통대학교 논문집 Vol.30 No.2

In this paper, I suggest the enhanced query model that is made to execute integrated query. Additionally, the method of conventional object-oriented query model was mostly represented into code form with module, so it was complicated to be specified. Accordingly, I suggest both of user-defined method and system-defined method that are seperated to represent method more easily. And, I proposed method transformation rules.

압력용기 구조물 용접부에서 잔류응력이 피로균열진전거동에 미치는 영향

이연신,차용훈,김덕중,성백섭 朝鮮大學校 機械技術硏究所 1999 機械技術硏究 Vol.2 No.2

This paper is to investigated the influence of welding residual stresses on the fatigue crack growth behaviors in the vertical direction to the weld bead. So, Co₂Automatic welding was performed on the ASTM A5l6 grade 60 Steel. For skip and continuous fillet welding, the specimens of fatigue cracks are initiated at toe end and beginning of welded specimen. The fatigue life of continue fillet welding is greater then that of skip fillet welding. The fatigue lief of as welded specimen is longer than that of PWHT specimen because the compression residual stress are greater than the other zone, which are near the welding toe notch of welded specimen. For skip and continuous fillet welding, da/dN-ΔK relations show retardation at HAZ and increase linearly at the stable growth region.

PCB조립 라인의 준비 시간 단축 및 재고품 감소를 위한 스케줄링 전략

이영해,김덕한,전성진 한국경영과학회 1997 韓國經營科學會誌 Vol.22 No.1

Printed circuit board (PCB) assembly line configuration is characterized by very long set-up times and high work in process(WIP) inventory level. The scheduling method can significantly reduce the set-up times and WIP inventory level. Greedy sequence dependent scheduling (GSDS) method is proposed based on the current methods. The proposed method is compared with the current method in terms of three performance measures: line throughput, average WIP inventory level, and implementation complexity.