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김곤호,김건우,김영우,최영도,김종식,김상진,한승희,홍문표 漢陽大學校 工學技術硏究所 1998 工學技術論文集 Vol.7 No.1
Abstract- In a plasma source ion implantation, the target is successively biased by negative voltage pulses with an intrinsic finite rise time, resulting in the time-dependent sheath formation around the target. Measurement of time-dependent sheath during the pulse rise show the ion matrix sheath development which is in proportion to square root of time and pulse rise rate over plasma density but independent of the ion mass.
정종훈,김종표,김유수,안종학 東亞大學校附設스포츠科學硏究所 1999 스포츠科學硏究論文集 Vol.17 No.-
The issues for the aged have been appearing on the stage as the deep social problems since the end of 1970's when our communities began to enter into high level industry, which were concerned by people in modern times. The starting time to study on the aged in Korea was from the 1960's. Moreover, it was lively proceeded during the end of the 1970's and the 1980's. At first, it mainly dealt medical issues for them, then, spread up to their social concerns later. This study was to research about the participating type of the aged' leisure, sports activities, as well as its changable relationships with life satisfaction on the premise regarding the necessity of positive practice toward leisure and its participation as the positive solution scheme from the aged' issues, which was based on the social concerns related with the aged. According to the questionary method, to select the main group who were over 60-years-old, men and women in Pusan, it was studied and analyzed regarding the realities of the aged's leisure activities, the participating attitude in sports, the relationships between the degree of satisfaction life when participating in sports activities and the life satisfaction. The results were as follows ; 1. Among the low ranking scopes of the participating attitude in sports, in case of participating in sports for the self-training of character-building themselves, it significantly had and effect on the satisfaction of life. 2. In case of building their own character through sports activities, it had the highest effect on the satisfaction of life. 3. The satisfaction of sporting activities in their childhood had and effect on the life satisfaction.
한국 정신장애의 역학 조사 연구[I] : 각 정신장애의 유병률
조맹제,함봉진,김장규,박강규,정은기,서동우,김선욱,조성진,이준영,홍진표,최용성,박종익,이동우,이기철,배재남,신정호,정인원,박종한,배안,이충경 大韓神經精神醫學會 2004 신경정신의학 Vol.43 No.4
Objectives : This study aims to estimate the prevalence of the DSM-IV psychiatric disorders in Korean population using the Korean version of Composite International Diagnostic Interview (K-CIDI). Methods : Subjects were selected by taking multi-stage, cluster samples of 7,867 adult household residents, 18 to 64 years of age, in ten catchment areas. Total 78 trained interviewers administered the K-CIDI to the selected respondents, from June 1 to November30,2001. Results : Total 6,275 respondents completed the interview. Some 33.5% of respondents reported at least one lifetime disorder, 20.6% reported at least one-year disorder, and 16.7% reported at least one-month disorder. The most common lifetime disorders were alcohol abuse/dependence (17.24%), nicotine dependence/withdrawal (11.19%), specific phobia (5.16%), and major de-pressive disorder (4.25%). The lifetime prevalence of substance abuse/dependence (0.25%) and schizophrenia (0.16%) was very low. Nicotine and alcohol use disorder showed very high male/female ratio. Mood disorder and anxiety disorder were more prevalent among female than male. Conclusion : The prevalence of psychiatric disorders was high. In comparison with other studies, remarkable differences in distributions of psychiatric disorders across the areas and times were observed.
김원일,강종표,송지복 경남대학교 신소재연구소 1991 論文集 Vol.1 No.-
최근의 기계가공에서는 고도의 정밀도아 생산성을 함께 요구하고 있다. 일반적으로 정밀도가 높은 가공방법으로는 생산성은 떨어질 것이다. 따라서 생산성과 정밀도를 함께 향상시키는 한 방법으로 초음파 진동절삭을 예로 들 수 있다. 초음파 진동절삭이란 초음파역의 진동을 공구나 공작물에 가진시켜 가공하는 방법으로 본 논문에서는 이러한 방법으로 얻을 수 있는 여러 가지의 효과에 대하여 실험을 통하여 입증하고자 한다. The ultimate target of machining process is to get both precision and productivity simultaneously. To obtain these effects, many kinds of machining methods have been considered and various research effort has been made for a long time. Ultrasonic vibration cutting method is one of these methods. When the ultrasonic vibration is applied on the workpiece or the too, the cutting tool makes periodical contact with workpiece due to vibration. The cutting is performed by vibration impact force while the cutting tool contacts the workpiece, and it makes the displacement of both the tool and workpiece minimum in three cutting force component (principal, axial, radial force) direction during the cutting process. So the cutting precision is better than the the conventional cutting method.
유화중합을 이용한 폴리스티렌 미세다공체의 제조에 관한 연구
김선남,엄기범,우종표 명지대학교 대학원 1997 대학원논문집 Vol.1 No.-
A low density microcellular foam was prepared using inverse emulsion polymerization method. First radically polymerizable styrene monomer and water with nonionic surfactants formed inverse emulsion, then this system was polymerized. The microcellular foam was obtained by removing water phase. The morphology of emulsion foams with system variables was examined in terms of pore size, cell structure, bulk density, and specific surface area. The emulsion system variables including monomer feeding methods, oil phase/water phase ratio, surfactant/water ratio, and mechanical stirring conditions were consider in this study. The ratio of surfactant/styrene rather than that of styrene/water shows dominant effect on the pore size of emulsion foams. While the open-cell/closed-cell morphology was mainly determined by the ratio of styrene/water. Mechanical stirring also has an effect on the pore size. Sorbitan monooleate among various nonionic surfactants seems to be the best surface active agent in styrene/water inverse emulsion system.
김종두,안기완,서영환,조경상,김철,김상도,홍순표 朝鮮大學校 附設 醫學硏究所 1992 The Medical Journal of Chosun University Vol.17 No.1
This study was attempted to investigate the dissolution rate and the bioavailability of commercially available rifampicin preparations after oral administration in nine normal volunteers. Cross-over design was used for the analysis. The dissolution test was conducted in artificial gastric juice and artificial intestinal juice using basket method with four rifampicin preparations (A, B, C, and D) which were pharmaceutically equivalent. The results were as follows; The dissolution rate was higher in the order of A>C>B>D in artificial gastric juice, and A>B>C>D in artificial intestinal juice. Area under the blood concentration time curve (AUC) was larger in order of A>C>B>D. Relative bioavailability(%) of rifampicin preparations were 93.6% for B, 97% for C, 84.4% for D preparation compared with standard A preparation. Peak blood concentration (Cmax) was higer in order of A>B>C>D. Peak time (Tmax) was larger in order of D>C>A>B. Absorption rate constant (Ka) was larger in order of B>A>D>C. there was little difference in elimination rate constant and biological half-life. The correlation of the dissolution rate in artificial gastric juice and area under the blood concentration time curve as well as correlation of the dissolution rate in artifical intestinal juice and peak time showed significant linear relationship. From the result of the this experiments, it can be concluded that for the choice of preparations, bioavailability must be performed in man because the bioavailability of rifampicin preparations showed big differences among commercial preparations which were abvertised as pharmaceutically equivalent, and that the bioavailability of rifampicin preparations in man partially could be predicted from the results of dissolution rate.
구순구개열환자에서 자가입자망상골을 이용한 이차성 치조골이식에 관한 임상적 연구
김종렬,진성준,조영철,표세정,변준호 대한악안면성형재건외과학회 2001 Maxillofacial Plastic Reconstructive Surgery Vol.23 No.2
Purpose : This study is conducted to evaluate the clinical success of secondary alveolar bone grafting using autogenous iliac particulate cancellous bone marrow in cleft maxilla. Materials and methods : We evaluated 107 cleft patients who had been admitted to the Dept. of Oral and Maxillofacial Surgery of Pusan National University Hospital from January 1, 1991 to January 31, 1999 and had been performed secondary alveola bone grafting with autogenous particulated cancellous bone marrow from iliac crest. Results : 1. Men were 70 and women were 37, which shows 65.4% and 34.6% and the proportion of males to females was 1.9: 1. Unilateral cases were 89(83.2%) and bilateral cases were 18(16.8%). 2, Age of bone grafting is widely distributed from 7 to 29, and the average was 13.2. 3. Success rate was 97.8% in unilateral cases, 94.4% in bilateral cases. Overall success rate was 96.7%. 4. We evaluated the bone graft contour by the percentage of bone attachment level adjacent to the alveolar cleft and the menial side showed 82.4% and the distal 87.7%. 5. The amount of notching the alveolar ridge at the grafted site through the ratio of notching length up to the most apical base to the length of proximal segment anatomic root was 0.19.