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항공스포츠 교관의 지도유형, 여가몰입 및 여가이득의 인과관계
김경렬(Kyung Ryul Kim) 한국사회체육학회 2012 한국사회체육학회지 Vol.0 No.50
This study was to test a structural modeling designed to hypothesize the causal relationships between air sport instructors` teaching types and participants` leisure flow and benefits. 233 participants were recruited from paragliding venues located at the state of Gyeong-gi and Gang-won. Statistical programs such as SPSS(V. 15) and AMO(V. 7) were employed to test a SEM modeling where causal relationships among designed factors were set. First, it was found that instructors` teaching styles significantly affected leisure flow of participants. Second, it was also found that the teaching styles significantly influenced leisure benefits of participants. And lastly, there was a significant relationship between leisure flow and leisure benefit among the participants. All relationships were found to be positive.
PEFP 100 MeV Drift Tube의 열 및 유동 특성에 관한 연구
김경렬(Kyung-Ryul Kim),박준(Jun Park),김형균(Hyung-Gyun Kim),김희섭(Hee-Sub Kim),황운하(Woon-Ha Hwang),윤종철(Jong-Cheol Yoon),권세진(Sei-Jin Kwon),손윤규(Yoon-Gyu Son) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.5
The Resonance Control Cooling System (RCCS) was designed and fabricated by Pohang Accelerator Laboratory (PAL) for the 20 MeV proton Drift Tube Linac (DTL) of the Proton Engineering Frontier Project (PEFP). Design of the RCCS pumping skid depend on the characteristic of Drift Tube (DT) in the DTL Tank. The 100 MeV DT is different from configuration of the 20 MeV DT. The 100 MeV DT contains an Electro Quadrupole Magnet (EQM) which is made of a hollow conductor. We have to confirm the property of thermal and hydraulics with size and configuration of the EQM because that is important parameter to design the RCCS of 100 MeV DTL. This paper discussed the result of fluid dynamics model, test by the DT tester, study on the thermal property and finally design of the RCCS pumping skid for the 100 MeV DTL.
PEFP DTL 가속장치의 공진주파수 제어를 위한 펌프장치의 설계 및 성능에 관한 연구
김경렬(Kyung-Ryul Kim),박준(Jun Park),김형균(Hyung-Gyun Kim),김희섭(Hee-Sub Kim),황운하(Woon-Ha Hwang),윤종철(Jong-Cheol Yoon),이몽수(Mong-Su Lee),조은별(En-Byul Cho) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.11
The Resonance Control Cooling System (RCCS) prototype installed in KAERI site has been designed to control the resonant frequency of the normal conducting drift tube linac (DTL) for the Proton Engineering Frontier Project (PEFP). The RCCS water pumping skid is composed of two channels as a by-passing the cooling water and a plate heat exchanger. The required temperature can be achieved by mixing both channels in order to control its the resonant frequency at 350 ㎒. The temperature controlled water pumping skid operates in combination with the Low Level Radio Frequency (LLRF) system. We have discussed the design, modeling with each components, control scheme, fabrication and test results of the water pumping skid for resonant frequency control of the DTL cavity. In conclusion, the fabricated RCCS prototype through the optimization of modeling has corresponded with the design requirement and concept.
김경렬(Kyung-Ryul Kim),박준(Jun Park),김형균(Hyung-Gyun Kim),김희섭(Hee-Sub Kim),권세진(Sei-Jin Kwon),황운하(Woon-Ha Hwang),윤종철(Jong-Cheol Yoon),노준택(Jun-Taek Noh) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.10
This paper describes the design requirement, manufacture and optimization of a prototype cooling water skid for the PEFP 20 MeV DTL. The main objective of this prototype is to control resonance frequency of DTL system through the temperature control of cooling water. It is to resonant frequency of the drift tube cavities to 350 ㎒. The prototype water skid operates in combination with the low-level rf system (LLRF) to set the operating point of the drift tube. The frequency loop from the LLRF system will define the set points for the temperature control loop which will be able to control the tuning of the drift tube by regulating its temperature. This paper describes the design of a prototype cooling water skid required for the temperature control of the DTL cavities, focusing in the modeling and simulation of the cooling system, the sizing of water pumping skid component and the temperature control scheme.
패러글라이딩 참여자의 몰입경험, 여가유능감 및 여가이득의 인과관계
김경렬(Kyung-Ryul Kim) 한국엔터테인먼트산업학회 2016 한국엔터테인먼트산업학회논문지 Vol.10 No.6
본 연구의 패러글라이딩 참여자의 몰입경험, 여가 유능감 및 여가이득의 영향력 관계를 실증적으로 분석하기 위하여 외·내생 변수간의 구조적 인과관계를 분석하였다. 조사대상은 2016년 3월~2016년 10월까지 경기, 충북 지역의 패러글라이딩 활공장을 직접 방문한 실제 참여자 247명을 표집하였으며 AMOS 통계프로그램을 이용하여 구조방정식(SEM: structural equation modeling) 모형을 도출하였다. 설계된 이론적 근거와 연구방법에 의하여 연구한 결과 다음과 같은 결론을 도출하였다. 첫째, 패러글라이딩 참여를 통하여 획득된 몰입경험은 여가유능감에 유의한 정(+)적 영향을 미쳤다. 둘째, 패러글라이딩 참여를 통하여 획득된 몰입경험은 여가이득에 유의한 영향을 미치지 않았다. 셋째, 패러글라이딩 참여를 통하여 획득된 여가유능감은 여가이득에 유의한 정(+)적 영향을 미쳤다. 이러한 결론을 바탕으로 패러글라이딩 활동을 통하여 획득된 몰입경험은 여가활동의 유능감을 높여주는 주요 변인임이 밝혀졌다. In order to analyze empirically the influence of leisure experience, leisure competence, and leisure gain of the paragliding participant in this study, the structural causality between external and internal variables was analyzed. The survey subjects were 247 participants who visited the paragliding site in Kyunggi, Chungbuk, from March, 2016 to October, 2016. The statistical program was used to derive a structural equation modeling (SEM) model. The following conclusions were drawn from the results of the study by the designed theoretical basis and the research method. First, the flow experience obtained through participation in paragliding had a positive (+) effect on leisure competence. Second, the flow experience obtained through participation in paragliding did not have a significant effect on leisure gain. Third, leisure competence acquired through participation in paragliding has a positive (+) effect on leisure gain.
20 MeV DTL 냉각계통의 유동 특성에 관한 수치해석
김경렬(Kyung-Ryul),박준(Jun Park),권세진(Sei-Sin Kwon),김형균(Hyung-Gyun Kim),김희섭(Hee-Sub Kim),황운하(Woon-Ha Hwang),윤종철(Jong-Cheol Yoon) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.5
The cooling water system for the PEFP 20 MeV proton accelerator was established and tested to obtain the precise resonance frequency of DTL through the temperature control of cooling water. The water temperature in the main flow loop was manipulated by adjusting the proportion of hot water returning from the DTL structures through the heat exchanger loop. Due to low duty factor operation and insufficient cooling loop installation of the DTL tanks, the manual mode operation was applied to maintain the DTL temperatures close to their resonance temperatures. The optimized process conditions with flow balancing and pressure drop in the DTL cooling systems are reported.