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허복,黃樹寬,朱永恩 慶北大學校 師範大學 1986 敎育硏究誌 Vol.28 No.-
In an effort to elucidate the effect of ethanol on the pulmonary function in athletes, 26 athletic college students were selected. Pulmonary function test was performed after administration of ethanol to the blood ethanol level of 40㎎/㎗. Results of the test were summarized as follows: Forced expiratory volumes were decreased by ethanol, and FVC and FEV_0.5, in particular, showed a significant decrease. Forced expiratory flows were decreased by ethanol. Especially, PEF, PEF_25%, FEF_(200∼1200㎖), and FEF_(25∼75%) showed a significant decrease. MVV was decreased by ethanol ingestion. Alveolar PO_2 and PCO_2 were not changed by ethanol ingestion. Blood pH, PCO_2, PO_2, bicarbonate, base excess, O_2 content and O_2 saturation showed no significant change.
5급 glass ionomer cement 수복물의 응력분포에 관한 3차원 유한요소법적 분석
허복 부산대학교 병원 암연구소 2006 부산대병원학술지 Vol.- No.20
Purpose: The purpose of this study was the analysis of stress distribution of class V resin modified glass ionomer cement restorations for determination of reasons of failure. Method: 3D FE model of maxillary second premolar was constructed with the use of micro-CT and ANSYS. Mter simulation of class V resin modified glass ionomer cement restorations, stress distributions on the cavosurface margins and cavity walls were analyzed with ANSYS. Results: Principal stress concentration at the lesion apex of unrestored cavity was reduced remarkably after restoration. But tensile stress distribution on cervical margin area was increased after restoration. Conclusion: Within the limits of this study, interface failure at the lesion apex, leakage and fracture of cervical margin area are anticipated.
Racket 運動時의 反應時間과 運動速度 改善을 爲한 Simulator 「SQT」에 關한 硏究
허복,蔡鴻遠,李來華,李敏炯,金基學,鄭相澤,朴宇奎 慶北大學校 體育科學硏究所 1986 체육과학연구지 Vol.2 No.-
The main purpose of this study was to improve greatly the most important reaction time(RT) and speed of movement (SM) at racket exercise by making program for simulator super quality training (S.Q.T) and applying it. The subjects employed were 25 male athletes composed of soccer players 8, volleyball players 7, shooting players 2, soft-tennis players 2, gymnastics player 1, and rugby football player 1 at the Kyungpook National University. We devided each sport player half and half by means of their pre-testing reaction time, and the subjects were devieded into experimental and control group. Experimental group was drilled by using light stimulus simulator training method and control group was drilled by using sound stimulus simulator training method. The training was practiced 20∼30 minutes a day regularly and 5 times a week for 5 weeks. Two groups practiced concentrically experimental learning by using light and sound simulator equipment by S.Q.T. program under equal condition. The propriety on the training effect was investigated by longitudinal analysis of results tested before and after experiment. As the result of the experiment, superiority and inferiority of two groups was evaluated by trying crosssectional analysis. The results obtained were summarized as follows: 1. Reaction time Experimental group; The performance of this group was greatly improved after experiment. Control group; The performance of this group was greatly improved after experiment. Comparison of two groups; Leftward simple completion time showed a significant difference (p<.01), but the other elements did not showed it. As a whole, experimental group was superior to control group, but statistics showed little difference between the two groups. 2. Speed of movement Experimental group; The performance of all elements were improved after experiment(over p<.05). Control group; The performance of this group was improved at only 4 of 9 elements after experiment Comparison of two groups; The performance of service and dash showed a significant difference (p<.01) and the others did not showed it. But as a whole, experimental group was superior to control group in their performance. 3. Viewing Variance and correlation coefficient at the change of RT and SM, there were differences in the variance. This means that the standard deviation is great; i.e. the individual difference is great. The lower correlation coefficient means that correlationship is low in the performance before and after experiment: i.e. it means that individual difference was decreased because the gap of two groups, correlation coefficient became less. Especially, statistics showed that the record of the lower recorded players could be shortened to a maximum.
5급 흐름성 복합레진 수복의 전단응력분포에 관한 3차원 유한요소법적 분석
허복 부산대학교 병원 암연구소 2008 부산대병원학술지 Vol.- No.24
Purpose: The purpose of this study was the analysis of shear stress distribution of class V flowable composite resin restorations for determination of reasons of failure. Materials & Method: 3D FE model of maxillary second premolar was constructed with the use of micro-CT and ANSYS. After simulation of class V flowable composite resin restorations, shear stress distributions on the cavosurface margins and cavity walls were analyzed with ANSYS. Results: Shear stress concentration at the lesion apex of unrestored cavity was reduced remarkably after restoration. But shear stress distribution on cervical margin area was reduced slightly after restoration. Conclusion: Within the limits of this study, interface failure at the lesion apex and leakage at the cervical margin area are anticipated.