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      • 테니스 포핸드 스트로크 시 왼팔의 이용 유무가 스트로크의 정확성에 미치는 영향

        우상연,최성범,김호묵 순천향대학교 기초과학연구소 2011 순천향자연과학연구 논문집 Vol.17 No.1

        The purpose of this study is to analyze and compare accuracy and kinematic characteristics of forehand strokes upon using the left-hand and non the using left hand in tennis. Six unskilled collegiate players who complied primary tennis course participated in this study. Subjects were requested to hit 10 balls with 4 types each: first, it was two directions(down the line, cross), second, it was two velocities(slow ball, fast ball) and then it was type of using left hand. Variables such as accuracy, time, distance, angle and velocity variables were measured by USPTA method and video cameras. The results of this study are as follows: 1) accuracy of hitting balls was not different according to the type of using left hand. While there was an interaction between ball velocity and hitting direction. 2) impact positions of hitting ball were not different according to the type of using left hand. While impact positions were done near by target direction in cross direction then down the line direction. 3) shoulder rotation angle was not different according to the type of using left hand. While shoulder rotation angle was grater in down the line direction than cross direction. 4) the maximum velocity of racket head was faster in using left hand than non using left hand.

      • 노인체육지도자 자격연수과정 평가 분석

        주성범 남서울대학교 출판국 2014 남서울대학교 논문집 Vol.20 No.1-2

        This study in intended to evaluate and analyze with the qualification training course of sport & exercise leader for elder. The course is provided to 45 persons engaged in jobs relating to the improvement in elders' health. And 100-hour theoretical and practical qualification training course had progressed for 10 weeks. After that time, a survey was conducted for the evaluation and value analysis of qualification training course. It was possible to know the positive evaluation and high satisfaction of this qualification training course of sport & exercise for elder through whether the course was completed, whether the certificate was obtained, whether other people would be invited to participate and whether they would participate in the intensive course. Besides, it was possible to check information about a program preferred by participants.

      • 공동주택 유지관리 FCI 모니터링에 관한 연구

        범성우,정영한,박태근 대한건축학회 2004 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.24 No.1

        After the 1980' s governmental housing business policy was vigorously attained, demand of apartment housing is still on the increase, but systematic maintenance is not following this current incerase trend. A promotion about the realization on the importance of maintenance due to life-time degradation of apartment housing and a plan of life-long practice of maintenance established together with longterm stratergy for maintance upkeep must be imperative. Purpose of this study presents application plan about FCI from rifle cycle viewpoint of building. Expect that is used laying plan that is middle part of a song miracle in actuality and expense arbor in the mountains of longtimer line plan of apartment house. As administration subject establishes well-timed repair time and more strategic budget, may behave better maintenance.

      • KCI등재
      • 제주 동굴의 라돈농도 측정

        고상혁,김형석,정범진 제주대학교 방사능이용연구소 2003 연구보고 Vol.17 No.-

        Radon is a radioactive gas emitting α particles. It is chemically stable due to its inert characteristic. While its daughter products, 218Po, 214Bi, 214Pb and 214Po, attached with aerosol particles, is known to cause lung cancer. As radon is produced from uranium and thorium, it accumulates in poorly ventilative underground voids such as caves and mine. Radon concentrations at caves in Jeju were measured in this study. The measurements were by setting three CR-39 detectors for 70 days at 2∼4 positions in Manjang, Hyupjae and Ssangyong caves. The radon levels of the caves spread 403.1∼606.7㏃/㎥. With these results, it is concluded that the Jeju caves have 6 times higher radon concentrations than ordinary house of 65.3㏃/㎥ and that they are higher than Seoul subway stations due to poor ventilation. While, the caves in Jeju have lower radon concentrations than limestone caves of Robin Hood. The radon concentration in the middle of Manjang cave is slightly higher than the action level in the work place of 500㏃/㎥ suggested by the ICRP. The measurement errors are estimated to be less than 5% from its calibration factor.

      • 정지가동상태에서 자동차에 의한 오염물질 배출에 관한 연구

        이범진,이성수,안규동,이병국 순천향대학교 산업의학연구소 2001 순천향산업의학 Vol.7 No.1

        This study was conducted to evaluate the levels of exhaust emission of vehicles from Yesan Gun area. During 1995 through 1996, 360 vehicles were sampled randomly and analyzed by vehicle owner's characteristics, owner's vehicle manufacturing companies, owner's vehicle purchase types(new or used), owner's vehicle residence, owner's vehicle types, vehicle fuels used, vehicle mileages, and vehicle model years, also vehicle exhaust emissions on idling condition were measured. To evaluate the exhaust emissions of the diesel engine vehicles(n=140) by particulate, those of the gasoline engine vehicles (n=220) were examined by CO and HC. The results were as follows; 1. The frequency of vehicle owner's gender was 287 persons in male and 18 persons in female, whereas that of vehicle purchase types(new or used) was 306 persons in new vehicles and 53 person in used vehicles. The frequency of owner's vehicle residence was 214 persons in town area and 144 persons in rural area, whereas that of owner's vehicle manufacturing companies was 141 persons in A company vehicles, 141 person in B company, 42 persons in C company, and 35 persons in D company. 2. The mean value of vehicle model years was 3.2±2.9 years in gasoline engine vehicles and 3.1±1.8 years in diesel engine vehicles, whereas that of vehicle mileage was 5.6±4.3(10,000Km) in gasoline engine vehicles and 6.1±6.5(10,000Km) in diesel engine vehicles. But no significant difference in vehicle model years and vehicle mileages between the diesel engine vehicles and the gasoline engine vehicles was observed The mean value of vehicle exhaust emission of CO or HC was 0.70 ± 1.75 ppm (CO) and 93.29 ± 127.96 ppm (HC) in gasoline engine vehicles, respectively, whereas that of vehicle exhaust emission of particulate was 34.31 ± 12.02 in diesel engine vehicles. 3. In pearson's correlation analysis of gasoline engine vehicles, HC was correlated with CO(r=0.64, p=0.0001), vehicle mileage(r=0.25, p=0.0002), vehicle model year(r=0.23, p=0.0006), and remnant period of regular exhaust emission examination(r=0.09, p=0.1925). In pearson's correlation analysis of diesel engine vehicles, particulate was correlated with remnant period of regular exhaust emission examination(r=0.16, p=0.0599), vehicle model year(r=0.09, p=0.2745), and vehicle mileage(r=0.01, p=0.8297). 4. Multiple linear regression analysis using CO as dependent variable and selected variables(owner's gender, owner's age, vehicle manufacturing company, vehicle purchase type, remnant period of regular exhaust emission examination, vehicle mileage, and vehicle model year) as independent variables, revealed that none of them was significant to the dependent variable. Multiple linear regression analysis using HC as dependent variable and selected variables as independent variables, revealed that owner's gender was significant(p=0.012) to the dependent variable, and vehicle model year was marginally significant(p=0.063). Multiple linear regression analysis using particulate as dependent variable and selected variables as independent variables, revealed that vehicle model year was significant(p=0.015) to the dependent variable, and vehicle mileage was marginally significant(p=0.096). 5. Logistic analysis of the excess of exhaust emission criteria of CO with selected independent variables(owner's gender, owner's age, vehicle manufacturing company, vehicle purchase type, remnant period of regular exhaust emission examination, vehicle mileage, and vehicle model year) indicated that only vehicle model year was significant to the dependent variable(odds ration=1.233, 95% confidence interval : 1.094- 1.389). Logistic analysis of the excess of exhaust emission criteria of HC or particulate with selected independent variables indicated that none was significant to the dependent variable, respectively.

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