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- 저자 : 김태규(Taegyu Kim) (검색결과 118 건)
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테니스 플랫서브시 키네시올로지 테이핑 적용에 따른 어깨뼈의 운동학적 분석
김태규,최호경,Kim, Taegyu,Choi, Hokyung 한국융합학회 2020 한국융합학회논문지 Vol.11 No.9
This study aimed to identify the difference of scapular movements between tennis players with and without shoulder impingement syndrome(SIS) and to verify the effect of kinesiology taping applied to scapular. A total of 15 players were categorized in SIS group(n=7) and control(CON) group(n=8). The scapular movements evaluated using 3-dimensional motion analysis in the 5 events of the flat first serve before and after the application of taping. The male of SIS group(-7.31±1.19° and -5.28±1.08°, respectively) had tilted scapular more anteriorly compared to CON group(-0.98±5.38° and -0.44±3.52°, respectively) at the maximally humeral external rotation and the impact(Z=-2.309, p=.021 and Z=-2.309, p=.021, respectively). The scapular(-8.11±2.57°) of female in SIS group tilted more anteriorly than that of CON(-0.97±3.31°) group at the maximally humeral external rotation(Z=-2.121, p=.034). But the scapular movements had no statistical differences between before and after the application of taping.
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김태규(Taegyu Kim),권세진(Sejin Kwon) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.11
A MEMS methanol reformer was fabricated and its performance was evaluated in the present study. Catalytic steam reforming of methanol was selected because the process had been widely applied in macro scale reformers. Conventional Cu/ZnO catalyst that was prepared by co-precipitation method to give the highest coating quality was used. The reactor structure was made by bonding three layers of glass wafers. The internal structure of the wafer was fabricated by the wet-etching process that resulted in a high aspect ratio. The internal surface of the reactor was coated by catalyst and individual wafers were fusion-bonded to form the reactor structure. The internal volume of the microfabricated reactor was 0.3㎤ and the reactor produced exhaust gas with hydrogen concentration at 73%. The production rate of hydrogen was 4.16ml/h that could generate power of 350㎽ in a typical PEM fuel cell.
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항공기 수리부속의 간헐적 수요에 대한 데이터 마이닝 기반 예측 방법 - 공군 항공통제기(E-737) 수리부속을 중심으로 -
김태규 ( Taegyu Kim ),마정목 ( Jungmok Ma ) 한국항공경영학회 2018 한국항공경영학회지 Vol.16 No.4
Improving the accuracy of demand forecasting for repair parts is an important part of the effective execution of the defense budget. However, it is challenging to forecast the demand for intermittent items that have irregular sizes and intervals characteristics with the forecasting method(time series analysis) adopted in the Military. In this study, the authors collected the flight operation data(flight time, number of flights), weather data(temperature, humidity), and quarterly repair data of E-737 from 2012 to 2015. Then, both data mining and time series models were fitted with the data. The result reveals that the prediction accuracy of data mining models can outperform that of time series models with the case of intermittent spare parts of E-737.
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金兌奎(Taegyu Kim),金鍾旭(Jong-Wook Kim) 대한전기학회 2007 전기학회논문지 Vol.56 No.6
This paper introduces an optimal design technique for a 250-watt isolation transformer using an optimization method, dynamic encoding algorithm for searches (DEAS). Although the optimal design technique for transformers dates back to 1970s and various optimization methods have been developed so far, literature concerning global optimization for transformer core design is rarely found against its importance. In this paper, core configuration of the isolation transformer whose performance is computed by complex mathematical steps is optimized with DEAS. The optimization result confirms that DEAS can be successfully employed to transformer core design for various performance specifications only by adjusting weight factors in cost function.
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전동 무인기 구동용 화학수소화물 기반 200W급 연료전지 시스템 개발
김태규(Taegyu Kim),심주형(Ju-hyeong Sim),김진철(Jincheol Kim) 한국추진공학회 2013 한국추진공학회 학술대회논문집 Vol.2013 No.12
본 연구에서는 전동 무인기 구동용 화학수소화물 기반 200W급 연료전지 시스템을 개발하였다. 연료전지 시스템은 고분자 전해질막 연료전지와 수소원으로 수소화붕소나트륨(NaBH4) 알칼리 용액을 사용한 수소발생기로 구성된다. 수소발생기는 유지보수와 취급이 용이하도록 탈부착이 가능한 모듈형태로 제작되었다. 또한 일체형 컴팩트한 수소발생기는 연료전지 시스템을 높은 에너지밀도가 가능하게 하였다. 전체 통합된 연료전지 시스템은 다양한 작동조건에서 평가되었다. 또한 무인기 구동 시 급격한 동력부하가 요구될 때 안정한 출력을 발생하기 위해 연료전지와 배터리이 하이브리드 동력 시스템을 고안하였다. 개발된 연료전지 시스템은 425 W-hr/kg의 에너지밀도를 가짐으로써, 기존 배터리로는 가능하지 않았던 높은 항속시간을 제공할 수 있다. Chemical hydride-based 200W fuel cell system for electric unmanned aerial vehicles (UAVs) was developed in the present study. The fuel cell system consists of a polymer electrolyte membrane fuel cell (PEMFC) and a hydrogen generator using sodium borohydride (NaBH4) alkaline solution as a hydrogen source. The hydrogen generator was fabricated as a detachable module to make easy to handle and use for maintenance and repair. Moreover, the all-in-one compact hydrogen generator made it high energy density that the fuel cell system. The fully-integrated fuel cell system was evaluated at the various operating conditions. Hybrid power system of a fuel cell and battery was contrived to generate a stable power output when the sudden power load is needed. The developed fuel cell system had a specific energy density pf 425 W-hr/kg which provides a high endurance that not possible by existing batteries.
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