Hidradenitis Suppurativa 1 예

정철수,김용환 대한피부과학회 1971 大韓皮膚科學會誌 Vol.9 No.2

Hidradenitis suppurativa is a rare disease which represents a chronic suppurative and scarring process, affecting the apocrine glands due to persistent bacterial infection and apocrine dysfunction. We have experienced a case of hidradenitis suppurativa, 22-year-old female which involved both axillary region. Diagnosis was established by clinical characteristicsymptoms, histopathological findings and bacteriological examinations.

부산지방보훈청사

정철수,Jeong, Cheol-Su 대한건축사협회 2006 建築士 Vol.2006 No.9

일신화학공업주식회사

정철수 한국원예학회 2011 한국원예학회 학술발표요지 Vol.2011 No.5

테니스 포핸드 스트로크의 포워드 스윙에서 multisegment 스윙과 single unit 스윙의 라켓 속도에 대한 기여도 비교에 관한 연구

임규찬,정철수 師範大學 體育硏究所 1993 서울大學校 體育硏究所論集 Vol.14 No.2

The purpose of this study was to compare the contribution to the speed of the racket of multisegment and single unit forehand stroke during forward swing in tennis. Each one skilled subject was filmed with three-dimensional cinematography, and after the film analysis procedure using the Direct Linear Transformation method, the factors contributing to the speed of the racket in each subject were obtained. The following conclusions were reached: 1. The typical difference of the preimpact speed of the racket between the multisegment swing and the single unit swing was not found, but each swing pattern was inclined to be different. 2. Concretely, the shoulder and elbow joint dominated the multisegment initial swing pattern, and the trunk rotation and elbow joint dominated the multisegment final swing pattern. Especially, the somersault component of the upperarm rotation dominated the upperarm initial swing pattern, and the twist component dominated the upperarm final swing pattern. 3. The shoulder and elbow joint dominated the single unit initial swing pattern, and during the intermediate phase the trunk rotation and elbow joint dominated the single unit swing pattern, finally the shoulder joint and the trunk rotation and the elbow joint dominated the single unit final swing pattern. Especially, the twist component of the upperarm rotation dominated the upperarm initial swing pattern, and the somersault component dominated the upperarm final swing pattern.

포스터 발표 - 에너지환경분과 / 화학공정분과 : 중공사막에 의한 Co (Ⅱ) 의 분리에 관한 연구

정철수,이용진,김영일,박동원 한국공업화학회 1997 한국공업화학회 연구논문 초록집 Vol.1990 No.3

N/A Separations by hollow fiber modules are fast compared with conventional extraction equipment because of the large surface area per volume. In these modules, the reactants can be contacted at high speed and two flows are completely independent, so there are no problems with loading and channeling. General the mass transfer coefficients in hollow fibers will be maximized when the resistance of the membrane is minimized. This membrane resistance will be minimized if the hollow fiber is wet by the solvent that flow the outside of the fiber. In this paper, for the extraction of Co (II) from wastewater, the extractants were LA-2, EHPNA and TOPO. To determine the rate controlling step in hollow fibers, we examined the effect of inside and outside flow rates of the fibers. From these experiments, we identified for the extraction of system with partition coefficient in hydrophobic hollow fibers, mass transfer in the inside aqueous feed dominated the overall mass transfer.

Fluorescence In Situ Hybridization법을 이용한 상향류 Biobead(R) 공법에서의 HRT 및 역세 주기 변화에 따른 질산화 미생물의 군집특성

정철수,박정진,정하덕,최원석,변임규,박태주 대한환경공학회 2007 대한환경공학회 학술발표논문집 Vol.2007 No.12

Shape recognition performance analysis and improvement in Sendzimir rolling mills

정철수,박정현,한성익,김종식 대한기계학회 2014 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.28 No.4

Twenty-high Sendzimir rolling mills (ZRMs) typically use small diameter work rolls to provide massive pass reduction. Because ofthe small diameter of the work rolls, a rolled steel strip has a complex shape mixed with quarter, edge, and center waves. When the stripshape is controlled automatically, actuator saturation occurs in the shape actuator such as AS-U rack. These problems affect productivityand the quality of products made from the rolled material. We analyzed problems on the shape control system of a ZRM. The shape recognitionperformance was analyzed by comparing the measured and recognized shapes by multi-layer perceptron (MLP) method. Inaddition, neural network using the radial basis function (RBF) method was proposed to improve the shape recognition performance of theshape control system in a ZRM. P-gain which compensates the scale of the strip shape is added to prevent actuator saturation. Finally, weverify the variation of actuator position using ZRM’s shape control simulator. Through simulation results, we found that shape recognitionperformance can be improved by the proposed method based on RBF neural network and actuator saturation problem can be improvedby increasing shape recognition performance.

韓國農村에 있어서 農事技術革新의 受容過程

鄭喆洙 慶北大學校 東洋文化硏究所 1974 東洋文化硏究 Vol.1 No.-

1. Objectives of the Project: (1) To determine how the farmers adopt agricultural innovations encouraged by the farming policy authorities and to see the correlations between their attitudes of adoption of agricultural innovations and their socio-economic conditions. (2) To study what kinds of communication sources the farmers use in acquiring information about the agricultural innovations, and to make a comparative analysis of respective roles of mass media or personal contacts in their adoption process. 2. Methodology (Selection of the Sample Villages/Households and Interviewing) Four C.D. Villages and as many non-C.D. villages were selected from Kyongsangbuk-do Province for the present study. From each of these eight villages forty to fifty households totaling 360 households in all were chosen by the use of random sampling method. A total of 360 householders were personally interviewed with a questionaire from August through October of 1973. Out of the original 360 respondents, only 341 respondents' answer proved to be valid for the study. Therefore 341 copies of questionaire were treated for comparison and analysis of this study. 3. Selected Characteristics of Sample Households (1) Median age 46.6 (2) Illiteracy rate 32.3% (3) Median size of family members 6.4 (4) Farm size 8.5tambo^* (5) Possession of radio 94.4% (6) Possession of TV 18.7% (7) Subscription of a newspaper 19.7% (8) Subscription of a magazine 17.0% (9) Subscription of a farm magazine 13.2% (10) Listening to radio programs on agriculture 54.0% (11) Dwelling duration of more than 30 years in the same village 83.6% (12) No experience of living in the town or city 19.6% ^*1 tambo is equivalent to .245 acres. 4. Data Analysis Collected (1) Adoption of Agricultural Innovation Programs In order to determine the attitude of adoption of agricultural innovation programs a questionaire of 12 items derived from the agricultlnal programs encouraged by the agriculture supervising authorities was given to each respondent, and the findings are shown in Table 1. TABLE 1 ◁표 삽입▷(원문을 참조하세요) On the basis of the data collected and using "Arbitrary Index Construction," we made an adoption index of agricultural innovation and the indices were correlated for comparison with respondents' socio-economic variables. The findings are as the following in Table 2. (The correlation between the two variables were testified by X^2-test.) TABLE 2 Correlation between the Adoption Index of Agricultural Innovations and Socio-Economic Variables ◁표 삽입▷(원문을 참조하세요) As shown in Table 2, in the correlation between the adoption index of agricultural innovations and the respondents' socio-economic variables, a high degree of significance is found in the items of farm size, the degree of participation in community organizations, the frequency of visit to Rural Guidance Offices and listening to radio concerning agriculture, while no statistical significance is found in the items of age and education of the householders. However, in the percentage rates of age in younger group (mainly, below 30 years of age) and of education in above elementary school level, the rate of adoption index proved to be high. Therefore it follows that those respondents who are younger in age and higher in educational background are more likely to have a strong tendency of adoption of agricultural- technological innovations. On the other hand, the comparison of C.D. villages with non-C.D. villages in their correlation of adoption index convinced us to conclude that villagers in C.D. villages show a stronger tendency toward adoption of agricultural-technologica innovations compared with that of non-C.D. villagers. (2) Adoption of Agricultural Innovations and Communication Sources The purpose of the chapter lies in the determination of the role of communication sources at adoption stages for adopter categories in the adoption of T.O.K weeding chemicals (that is, a kind of agricultural programs recommended to farmers), and furthermore to analytically and cross-culturally compare the findings of my study with those of my predecessors in and outside the country. Using the theoretical knowledge of Professor E.M. Rogers, an authority in Diffusion Theory, I divided adoption process of innovations as knowledge stage persuasion stage and decision stage, and I investigated what kinds of communication sources the respondents use in the respective stage. The adopters were catergorized by innovaters, early adopters, early majority, late majority and non-adanalyzed the role of communication sources at adoption stages for adopter categories. Thus I testified the hypothesis by E.M. Rogers. The followings are summary of the comparison for testification. 1. Mention of any mass media source was made by 35% of the 334 respondents, and personal communication sources were made by 62% at knowledge stage in the adoption process. A much higher difference in rate between mass media source and personal communication source is found in the decision stage rather than in the knowledge stage and in the persuasion stage. Therefore, unlike the rural community in the United States of America, the Korean rural community sees that the personal communication sources are of much greater importance in the knowledge stage and in the persuasion stage in the adoption process rather than mass media sources, and particularly, personal communication is of the utmost importance in the decision stage. 2. While the mass media communication sources play more important roles compared with those of personal communication sources in early adopters of innovations rather than in later adopters of innovations, personal communication sources play more important roles in both early adopters and late adopters of innovations. When we look into the reasons why the personal communication sources is more important than mass communication sources in every stage, they are firstly a poorer preparation and subscription of mass communication in Korean rural community than in his U.S. counterpart; secondly, a high rate of illiteracy of Korean farmers and a low rate of contact with mass media because of poor economic condition, etc. In conclusion the fact that Korean rural community shows a greater importance of personal communication sources rather than mass media communication in the adoption process compared with the case in the U.S., it follows that Korean rural community is still in the stage much more characteristic of Gemeinschaft. The findings of the present study reveals more than 26 percent of utilizing mass media sources in every stage of adoption process. Judging from these phenomena compared with those of Professor Seung-Gyu Mun (less than three percent in every stage), it may well say that we have witnessed a notable development for seven years thanks to a high rate of mass media expansion into rural areas and a successful performance of New Village Movement(or Community Development Plan) in which many agricultural innovation programs are included. On the other hand, when we compare the findings of the present study with that of 1973 in the rural community in Colombia(Percentage of Utilizing Mass Media Source at each stage), we can conclude that mass communication sources play a fairly great role in the diffusion of innovation. 3. Unlike the case in the rural area of the U.S., in Korea, the role of the personal-localite communication sources (33.6%) in the knowledge stage is higher than that of personal-cosmopolite communication sources (28.6%). This gap of rate between both sources was enlarged in the decision stage. Consequently the findings of the study agree with that of Rogers's study in Columbia in 1973. In short, we have surveyed some hypotheses about the role of communication sources at adoption process, developed in the advanced American society and we have concluded that they may not have cross-culturally validity in the rural community of Korea. On the other hand, we have found that the tendency of adoption process is similar to that of Colombian rural community. However, the only difference we may point out is that Korean phenomenon of roles of mass media and extension agents in every station of life shows a slightly higher than that of Colombian counterpart.

외전 운동에 Stretch-Shortening Cycle이 미치는 영향

서정석,정철수 師範大學 體育硏究所 1999 서울大學校 體育硏究所論集 Vol.20 No.2

The purpose of this study was to analyze an effect of stretch-shortening cycle when abduction movement is occurred about shoulder joint. To accomplish this, five male rugby-football players performed purely concentric abduction movement and abduction movement with stretch-shortening cycle according to three different angular velocities such as 60 degrees/sec, 180 degrees/sec and 240 degrees/sec. Torque, work and power value about two-types movement and three-kinds angular velocities were collected by Cybex 770 and then were analyzed using Excel 97 program. The following conclusions were found : 1. The stretch-shortening cycle abduction movement with pre-stretch was greater than pure abduction movement in peak torque by 9.37% and this effect of pre-stretch was decreased as the angular velocity is increased. 2. The angle to produce peak torque between two-types movement was not different significantly except 240 degrees/sec condition and this angle was increased as the angular velocity is increased. 3. SSC abduction movement including pre-stretch was greater than pure abduction movement in total work by 7.54% and this effect of pre-stretch was increased as the angular velocity is increased. 4. SSC abduction movement with pre-stretch was greater than pure abduction movement in power by 6.93% and this power was increased as the angular velocity is increased.

政治變動의 過程과 매스ㆍ코뮤니케이션

鄭喆洙 한국사회학회 1976 韓國社會學 Vol.10 No.-