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金龍祚 慶南大學校 附設 工業技術硏究所 1983 硏究論文集 Vol.1 No.-
剪斷스피닝 加工에 있어서 變形에너지 理論의 上界解析法을 導入하여 加工을 求하였다. Von Mises 材料로 假定하여 얻어진 結果는 롤러의 移送速度 및 코너半經이 減少할수록, 맨드럴의 圓錐半角이 클수록 加工 接線力은 減少하였고, 加工限界가 向上되는 파라메터가 되었다. 提案된 解析의 結果를 Kobayashi의 解와 比較하였고 아주 비슷한 結果를 얻었다. 또한 單純剪斷理論에 의하여 提案된 加工 接線力과 比較 및 檢討하였다. The expression for the tangential force of a shear spinning was derived with the use of a upper-bound method in a deformation energy theory. And the results obtained from assumptions of von Mises' material are as follows; the working tangential force is decreased with decreasing the feed and the radius of corner of a roller, and increasing the half angle of a mandrel. A present theory also was very similar to Kobayashi's results. In addition, the simple shear theory was discussed with the present theory.
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초등사회과 경제 영역의 기본 개념별 수행평가 방법에 관한 연구
김용조,임순환 광주교육대학교 초등교육연구소 2000 初等敎育硏究 Vol.15 No.1
This paper focused on the application at actual teaching field in the way of performance assessment that lately entered the stage as an alternative plan traditional way of evaluation at the 5th grade social studies economic area in elementary school. This paper presented the ground of an argument of performance assessment introduction based on a developmental evaluation view, cognitive psychology and multi-intelligence theory. Constantly to be feed back the goal of social studies economic education, guidance content, evaluation, we established the goal of social studies economic education and analyzed the content of economic education by ten pieces of basic concept in the 5th grade social studies elementary school. On the basic of these, we reconstructed by 8 pieces of basic concept against being guide at the 5th social studies curriculum now in use. One hand for the development of performance assessment of economic area, this paper utilized the existing techniques of performance assessment and made a criterion plan of the performance assessment . on the basic of this. We projected the way of performance assessment by basic concept. The result is as follows First, The production of a criterion plan of performance assessment can be a suitable tool of performance assessment. Second, if we used compound numbers technique of performance assessment, the result of evaluation would bring along the synergy effect. Third, we extracted the economic basic concept against being guided to the 5th grade in the elementary school. For further more studies, this paper suggests that the test way of performance assessment must be exploited as possible as early to know how much contribute to make progress higher order thinking like originality and problem solving capacity to information-oriented society and knowledge foundation society in the coming up.
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부교감신경차단제인 atropine sulfate와 glycopyrrolate가 위액 분비량 및 위액산도에 미치는 영향에 관한 임상적 연구
김용조,길찬일,신정순 고려대학교 의과대학 1982 고려대 의대 잡지 Vol.19 No.1
Gastric acid aspiration into the lung is a very grave pulmonary complication in general anesthesia for the surgical patients. There were many preventive methods of pulmonary aspiration of stomach contents such as N.P.O. prior operation, preoperative gastric lavage, administration of apomorphine to induce vomiting, metoclomide to empty stomach, and anticholinergics to reduce gastric secretion acidity etc. But, there were not absolute preventive measures of acid aspiration pneumonitis. Recently, a quaternary ammonium compound (glycopyrrolate) was introduced as an anticholinergics for its longer action and more potency than atropine. It is known to reduce gastric acidity and secretion. So, we performed a clinical survey to compare the effects of atropine and glyco pyrrolate on the pH and volume of gastric secretion. The results obtained were summarized as follows; 1. The incidence of dry cases of salivary secretion were 2/20 (10%) in group Ⅰ, 17/20(85%) in group Ⅱ, and 18/20(90%) in group Ⅲ. 2. The incidence of gastric volume≥0.4㎖/㎏ and pH≤2.5 were noted at 60min. after premedication as follows; 18/20(90%) in group Ⅰ, 16/20(80%) in group Ⅱ and 8/20(40%) in group Ⅲ. 3. The incidence of gastric volume≥0.4ml/㎏ and pH≤2.5 were noted at 120min. after premedication as follows; 18/20(90%) in group Ⅰ, 14/20 (70%) in group Ⅱ and 9/20(45%) in group Ⅲ.
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김용조 한국교육학회 대구·경북지회 1997 교육학논총 Vol.18 No.-
The purpose of this study is to clarify the contents and conditions of elementary teacher's profession, and is to analyze the status quo of elementary teacher training schools in terms of prior basis, and to suggest the alternatives for enchancing profession in elementary teacher education. The content of elementary teacher's profession are: childrens' learning, childrens' guidance, classroom management and education services. Several aspects of enhancing profession in elementary education are suggested (1) Specific educational objectives shoud be presented and established which reflect the specialities or professionals of teachers university. (2) The curriculum of teachers university shoud he constructed toward the reinforcing ways of elementary teacher preparation. (3) The curriculum shoud be revised in order to well cope with changing educational conditions and to meet student teachers' needs in term of one's whole personality and education. (4) Faculties of teachers university should influence and help teaching-learning activities with their specialties. (5) student teaching practice should sestrengthened in the way of increasing students' ability which leads to effective field adjustment. (6) Teachers university should secure competent not professors not only who are good at subject education, but also who are experienced in the actual field. (7) Teachers university should strengthen the admission system that could pull excellent elementary teacher applicants. (8) Various admission program should be adopted considering teachers university location and regional characteristics, by that excellent students can be maintained. (9) Dramatic supporting strategies should be implemented for better teacher education performance. (10) In terms of managing quality of teacher education, evaluations of teachers university should be executed and the present teacher licencing system should be changed. In summary, elementary teachers training schools should consider and make great efforts for improvement and development for elementary teaching profession. This study has important implications for restructuring and suggesting alternatives for the profession in elementary teacher education.
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A Study on Life Estimation of Hot Forging Die
김용조,최창혁 한국정밀공학회 2009 International Journal of Precision Engineering and Vol. No.
In this study, the forging die life was investigated using fatigue life and wear quantity, which are generally considered for estimation of die life. The main aim is development of the equations to adapt finite element analysis to life estimation for a hot forging die. The Archard's model was used to estimate the wear life of the die and Goodman's and Gerber's equations, using the stress-life method, were applied to estimation of the fatigue life. These techniques were applied to die life estimation for the hot forging die of a ball joint socket used in an autovehicle system. Rigid-plastic finite element analysis was first carried out for the forging process of the ball joint socket and then the elastic stress analysis was performed for the die in order to obtain fundamental data for the prediction of fatigue life. The die stress analysis requires the deforming loads of the workpiece to be translated into the contact loading of the die. In this case, the size of finite elements of the die and the workpiece is important for good interpolation of the loading. Therefore, the influence of element sizes on the interpolation results of the contact loading was also investigated. The wear volume of the die was measured using a 3-dimensional scanner of probe type. It was found that the measurement had a good agreement with the results of the finite element analysis for the die life estimation.
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