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유도 맞잡기 유형에 따른 양손업어치기의 동작의 운동학적 분석[Ⅰ]
김지태,허성규 한국운동역학회 2006 한국운동역학회지 Vol.16 No.2
J. T. KIM, S. G. HEO, A Kinematic Analysis of Morote-Seoinage(two-handed shoulder throw) According to the Kumi-kata Types in Judo[Ⅰ], Korean Journal of Sports Biomechanics, Vol. 16, No. 2, pp. 45-53, 2006. The purpose of this study was to analyze exercise related mechanical variables according to performance levels and Kumi-kata types in elite judo players (G1) and non-elite judo players, namely university players (G2). To achieve this purpose, three players in G1 whose main special skill was Morote-Seoinage and three university judo players(G2) was selected as comparative group. Then they were examined for distinguishing A and B types of Kumi-kata. Analyzed variables were the time required to show skills, knee degree, elbow degree. After analysing this study, conclusions were derived as follows.1. In total necessary time of showing skills according to group of Kumi-kata type, G2 was longer than G1 in both A type (20.9%) and B type (23.7%). In necessary time of phase, in only 3P, G1 was shorter than G2 in A type (50%) and B type (75%).There was no difference in time required of 1P and 2P according to Kumi-kata type of group and in only 3P, B type was shorter than A type in both B type (75%) of G1 and B type (50%) of G2.2. There was no difference in elbow degree of offensive arm according to group of Kumi-kata type, however in A and B types, G1 could use skills by extending in kake phase, but G2 could use skills by bending. Elbow degree of offensive arm according to Kumi-kata type of group showed difference in E1 and E2 of G1. A and B types of G1 extended elbow degree in Kake phase, but G2 bent elbow degree so exercise program which could movable range extensively in Kake phase is needed.* tae7689@hanmail.net
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김지태,Kim, Ji-Tae 대한건축사협회 1968 建築士 Vol.3 No.10
The heating system, ondol is indispensable for the Korean traditional houses. In the field of architecture today has been made rapid progress in Korea, but it is fact that under-floor heating system in traditional houses in korea has not improved up to now. As a matter of fact, to improve the traditional ondol under present housing structure is very difficult problem. So long as we live in such houses, we architects will have to fulfil our responsibility to improve the ondol system. This article offering data as a basic experiment will be helpful in studing under-floor heating system ondol.
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김지태,김성원,성건혁,김동준,유홍선 한국방재학회 2016 한국방재학회논문집 Vol.16 No.4
Vertical fire propagate through a broken building’s glass curtain wall system poses a serious threat to occupant and property. To prevent curtain wall system, using a water film is effectively. Thus, spray hole of glass side is added at existing water curtain nozzle for forming water film. In this study, numerical analysis is performed for obtain flow characteristics along area of pray hole to design goals which are water film over than 1 mm and unprotected area at curtainwall system. As a result, the flow rate decrease 1% according to area of spray hole of glass side decrease 1%. Therefore, flow characteristics of design goal could be archive area of spay hole of glass side is 32 mm 2 . 유리커튼월을 사용하는 건축물은 화재시 유리재가 파손되며 수직화재 전파가 발생 하므로 파손을 방지하는 것이 중요하다. 파손을 방지하기 위해서는 유리외장재에 수막을 형성하는 것이 매우 효과적이다. 따라서 수막을 형성하기 위하여 기존 워터커튼 노즐에 수막 형성을 위한 유리면 살수부를 추가 하였으며 수치해석을 통해 설계 목표에 부합하는 커튼월 노즐을 설계하고자 유리면 살수부 넓이에 따른 유동 특성을 분석하였다. 설계 목표는 커튼월 시스템에 1 mm 이상의 수막과 비보호면이 발생하지 않는 유동특성을 가지는 노즐 형상이다. 그 결과 유리면 살수부의 넓이가 1% 감소 할 때 유리면 살수부의 유량이 1% 감소하였으며 이러한 유리면 살수부 면적과 유량의 관계를 고려하였을 때 유리면 살수부의 넓이가 32 mm 2일 때 목표한 유동 특성을 확보할 수 있을 것으로 판단되었다.
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김지태,이강원,Kim, Ji-Tae,Lee, Kang-Won 한국정보통신학회 2015 한국정보통신학회논문지 Vol.19 No.6
In this study an active RFID system of low power consumption is proposed, for which we improved the tag collection algorithm of ISO/IEC 18000-7 standard and significantly reduced the tag collection time. We classified the type of power consumption according to the operating mode of active RFID and proposed the method which can accurately estimate battery life time. By calculating the power consumptions of proposed and current methods, we can compare the battery life times of both methods. Through this analysis we can demonstrate the superiority of the proposed method in battery life time.
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