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김향래 ( Hyang Rae Kim ),이준원 ( Jun Won Lee ) 한국유아체육학회 2008 한국유아체육학회지 Vol.9 No.2
The other side of recent economic growth and technological development has resulted in social problems such as environment pollution, increased stress, isolation of individuals, and increased adult diseases appeared along with urbanization and industrialization. These problems are becoming factors which are threatening quality of life of individuals, whereas the importance of leisure activity is increasing than ever as a way to enhance the quality of life. The juveniles may improve their quality of life through various leisure and sports experiences including local culture visit, various leisure & sports, well-being experience, orienteering and skill acquisition for tracking which are provided at the international camping. This study was performed to find out the effects of outdoor activity to the emotional aspect of juveniles through verifying the structure model of relationship between satisfaction about the experiences of the juveniles obtained through the camping, and their psychological well-being. To achieve the objective of this study, I collected samples of 250 middle & high school students who participated in the International Dynamic Korea Jamboree by using convenient sampling method. I used the total 235 samples as final effective samples excluding 15 samples which were not appropriate for the study. The data processing was confirmed by verification of appropriateness of model by using SPSSWIN Ver. 14.0 and AMOS 6.0 which was followed by verification of respective assumptions. The results of study verified by actual proof analysis are as follows: First, the commitment has positive(+) effect on self-realization. Second, the commitment has positive(+) effect on efficacy. Third, the commitment has positive(+) effects on happiness.
BaSO₄와 CaCO₃가 자동차용 Brake Pad의 마찰 특성에 미치는 영향 연구
정근중(Geun Joong Jeong),김향래(Hyang Rae Kim),김대환(Dae Hwan Kim),송현우(Hyun Woo Song),최형기(Hyeoung Gi Choi) 한국트라이볼로지학회 2004 한국트라이볼로지학회 학술대회 Vol.39 No.-
The purpose of this study is to investigate the firction characterisctcs of brake pads according to different ratios of BaSO₄/CaCO₃. Four brake pads with different ratios of BaSO₄/CaCO₃ were manufactured. The friction characteristics of brake pads were tested using 1/5 reduced scale tester. With increasing of the amount of BaSO₄ density and shear strength of brake pads were increased and hardness of brake pads were decreased. In effectiveness, the fricton coefficient of brake pad was higher and the stability of firction coefficient was better as the ratio of BaSO₄ increased. In fade test, friction coefficient of B3 sample used only CaCO₃ was decreased rapidly. B1 sample showed a good noise performance without noise generation. The wear resistance of samples were decreased with increasing of the ratio of CaCO₃.
브레이크 패드에 함유된 아라미드 섬유와 미네랄 섬유의 마찰특성 연구
공지운(Ji Woon Kong),박정환(Jung Hwan Park),정진오(Jin Oh Chung),김향래(Hyang Rae Kim) 한국자동차공학회 2007 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Friction characteristics of automotive friction materials according to the types of fiber were investigated by using a 115 scale brake dynamometer. fiber materials used in the study are aramid, mineral fiber respectively, while keeping other ingredients, such as binders, lubricants, abrasives, fillers the same. In the entire mode of friction test the friction coefficients of all the specimens show different among different pads even under the same temperature condition. In the effectiveness test, friction coefficients decrease with increase in the mineral fiber and aramid-containing friction material FB4 shows the highest coefficients. In the 1st fade test, fade phenomena is decreased with increase in the mineral fiber. The fade rate of FB1(scotching) is higher than the FB1. And 2nd fade rate is higher than 1st fade rate for each specimen. All the specimens tested showed a good recovery rate. The standard deviations of friction coefficient during entire mode for all the specimens were more stable with increase in the mineral fiber and FB1(scotching) is more stable than FB1.
브레이크 패드에 함유된 섬유재의 성분변화에 따른 마찰특성 연구
박정환(Jung Hwan Park),정진오(Jin Oh Chung),김향래(Hyang Rae Kim) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
To access the effect of fiber ingredients on friction characteristics of brake pad material, two kinds of specimens with different fibers were prepared. Fiber materials used in the study are aramid and acrylic fiber respectively, while keeping other ingredients, such as binders, lubricants, abrasives and fillers the same. Two different materials(FC25 and FC17) were used for disk rubbing the friction material. The friction materials were tested by 1/5 scale brake dynamometer and test mode is modified JASO C406-P1. The temperature changes showed almost the same variation throughout the entire mode of fiction test regardless of different materials. However the tested friction coefficient of each specimen showed a variation with different disks and friction materials. In the effective mode, friction coefficients of aramid-containing friction material showed higher friction coefficients than acrylic-containing friction material. The excellent fade resistance was observed when aramid-containing friction material was rubbed against the FC25 disk. The Recovery of fiction coefficient after fade was suitable for all the specimens except that acrylic-containing friction material was rubbed against the FC25 disk. On the other hand, high temperature test result that aramid-containing fiction material exhibited higher friction coefficients than acrylic-containing friction material. The friction stability was excellent for specimens containing acrylic fiber.