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Developpe derriere 수행시 하지 관절 모멘트 분석
신성휴,박기자,권문석 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.1
The purpose of this study was to analyze the joint moment on lower extremity using during a developpe deerriere. Data were collected by Kwon3D, KwonGRF program. Two females professional modern dancer were participated in this experiment. Subjects performed a developpe devant in meddle heights(90 deg.). On the axes of X, Y, Z, it wsa shown that the maximum joint moment was occured in hip joint. The moments are plotted during developpe devant. The ankle muscles generate a plantar flexion moment and the knee muscles generate a flexion moment and The hip muscles generate a extension moment. So these muscles of joint were kept the balance going. There is small active turn out possible a level of the leg below the hip joint. A small amount of extra turn out can be obtained when standing because of flexion between the foot and floor which can be used to give a passive external rotation force to the whole leg and this can produce a rotation between the knee and foot. This passive external rotation can produce very damaging results. So, the most important external rotator muscles shoud be trained the adductor group of muscles at hip joint, and be done stretch before performance.
신성휴,김태완,권문석,고석곤,박기자 한국운동역학회 2004 한국운동역학회지 Vol.14 No.3
S. H. SHIN, T. W. KIM, M. S. KWON, S. G. GO, K. J. PARK. Analysis of the angular momentum on the lower extremity by change of starting block angles. Korean Journal of Sport Biomechanics, Vol. 14, No. 3, pp. 165-175, 2004. The aim of this study is to show the effect of starting block angle on the starting motion of sprinters using a crouching start. After installing starting blocks on forced platform, and having four highly comparative sprinters use the starting blocks, I analyzed the angular momentum of a crouching start. From the results of the analysis, the following conclusions could be drawn: There were differences of angular momentum both in body's X, Y, and Z axes and in the thighs' X axes, but not in the pelvis and lower legs. As to the general change of block angle, we noticed that an angular momentum for each segments was higher at an angle of 50 to 55 degrees.
정후민,신윤권,조상복,이종화 울산대학교 2001 공학연구논문집 Vol.32 No.2
압저항형 스마트 실리콘 압력 센서를 0.6 ㎛ 이중 폴리 실리콘 이중 금속 CMOS 공정으로 구현하기 위하여 설계하였다. 이 스마트 실리콘 압력 센서는 압저항형 저항기들로 된 휘스톤 브리지를 갖는 다이아프램과 op-amp, A/D 변환기, 및 UART 회로 등의 주변회로 들로 구성되어 있다. 브리지 회로의 출력 전압과 압력에 의한 기계적 응력 사이의 관계를 COSMOS-M 상용프로그램으로 다이아프램의 응력 분포를 모의실험하여, 압저항기의 최적의 위치와 크기에 대한 연구를 하였다. CMOS op-amp 회로는 규정된 출력 특성을 얻기 위하여 크기가 다른 트랜지스터들로 설계하여 HSPICE로 모의실험하여 최적화 시켰다. A/D 변화기 회로는 가능한 칩 면적을 줄이기 위하여 서브 레인징 기법과 신경 MOSFET 구조를 이용하여 설계하였다. UART회로는 VHDL 소스 코드와 셀 라이브러리를 이용하고 Synopsys로 합성하여 설계하였다. 회로의 물리적 레이아우트 설계는 Mentor 틀로 설계하였다. 그러나 온도보상회로와 출력오프셋 문제는 아직 해결하지 못하고 다음에 연구할 예정이다. A piezoresistive smart silicon pressure sensor is designed to implement with 0.6 ㎛ double-polysilicon double-metal CMOS precess. This smart pressure sensor is composed of a diaphragm with piezoresistive resistors' Wheatstone bridge and the peripheral circuitry of op-amp, A/D converter and UART. The relationship between the output voltage of the bridge circuit and the mechanical stress by applied pressure was studied by simulating the stress distribution on the diaphragm with COSMOS-M package program to optimize the size and position of piezoresistors. The CMOS op-amp circuit was designed with different CMOS transistor sizes to obtain the defined op-amp output characteristics and simulated with HSPICE. The A/D converter was designed using neuron MOSFET structure and sub-ranging method to minimize the chip area. The UART circuit was designed by using VHDL source code and cell library and by synthesizing with Synopses and the physical layout of the circuit was designed with Mentor tools. The problems for temperature compensation and the output voltage offset were not yet considered.
정호철,이상한,정신교 慶北大學校農業科學技術硏究所 2007 慶北大農學誌 Vol.25 No.-
The several enzymes reaction which involve the quality change of fresh vegetables, such as chlorophylase, polyphenol oxidase, lypoxygenase, C-S-Iyase, myrosinase and enzymes related lignification were reviewed. Numerous enzyme reaction continuously proceeds to the deterioration of vegetables after harvest due to the respiration and biochemical metabolism reaction, especially in case of physical injuring. It is extremely important to inhibit and to control these enzyme reaction in order to maintain the organoleptic and nutritional quality of fresh vegetables.
Developpe devant 수행시 하지 관절 모멘트 분석
박기자,신성휴,권문석,김태완,이형나 한국운동역학회 2004 한국운동역학회지 Vol.14 No.1
K. J. PARK, S. H. SHIN, M. S. KWON, T. H. KIM, H. N. LEE. Analysis on lower extremity joint moment during a developpe devant. Korean Journal of Sport Biomechanics, Vol. 14, No. 1, pp. 133-144, 2004. The purpose of this study was to analyze the joint moment on lower extremity during a developpe devant. Data were collected by Kwon3D, KwonGRF program. Two professional modem female dancers were participated in this experiment. Subjects performed a developpe devant in meddle heights. On the axes of X, Y, Z, it was shown that the maximum joint moment was occurred in hip joint. The moments are plotted during developpe devant. The ankle muscles generate a plantar flexion moment and the knee muscles generate a flexion moment and The hip muscles generate a extension moment. So these muscles of joint muscles were known to play a key role in keeping the body balance while doing developpe devant. In addition adduction moment occurred at hip, knee, an ankle in the order of amount, we could assume from this data that turn out motion started from the hip joint. There was small active turn out possible below the hip joint. A small amount of extra turn out could be obtained when standing because of flexion between the foot and floor, which could be used to give a passive external rotation force to the whole leg and this could produce a rotation between the knee and foot. This passive external rotation could produce very damaging results. Therefore, lower extremity joint muscles such as hip, knee, and ankle muscle should be trained to keep the body balance and prevent injury during developpe devant performance. And for the safe and perfect turn ort performance, hip joint abduction, the most important external rotating muscle for turn out is needed to train and full stretching should be done in advance.
홍순모,신성휴 韓國體育大學校附屬 體育科學硏究所 1998 韓國體育大學校附屬 體育科學硏究所論文集 Vol.17 No.1
The purpose of this study was to examine the kinematical characteristics on the rotational motion in discuss throwing, and to grope for the better discuss throwing technique. The subjects, four collegiate discuss throwing players, were the standing player. 2S-VHS video cameras were used for the data collection. The Direct Linear Transformation(DLT) technique was employed to obtain 3-D position coordinates of 21 landmarks(20 body and 1 disk landmarks(Abdel-Aziz & Kararah, 1971) and a cubic spline function was used for smoothing and differentiation. It also calculates the location of center of mass using Plagenhoef's data. In this study, the rotational motion was divided into 4 events(ROF, RON, LON and REL) and two phases(LT, RT for the data analysis. From those, time duration, displacement of COG, velocity of COG and discuss, and trunk and release angles were calculated, and the following conclusions were drawn: 1. Last phase(LT) showed relatively shorter in time than the other phases. 2. In the displacement of COG, first phase(LT) showed longer displacement in horizontal direction, last phase(RT) showed longer displacement in lateral-medial direction and vertical direction 3. Last(RT) showed faster in the horizontal, lateral-medial and verical velocity. 4. At release, horizontal velocity was superior than lateral-medial and vertical direction. 5. The players rotated their body with backward. 6. The angular velocity of body was larger in beginning of rotation.
WDM-PON용 Bi-Di Ferrule 연마기 및 연마기술 개발에 관한 연구
김재열,허상휴,고명석,송경석,유신 한국공작기계학회 2007 한국공작기계학회 추계학술대회논문집 Vol.2007 No.-
WDM-PON(Wavelength Division Multiplexer) was known as solution of ultimate FTTH(Fiber-To-The-Home) in big city and internet network. Optical module part among whole system is the most difficult technologically, it is getting into bottle-neck of development. Quality, all prices are many up to now assignments to be satisfied, it can be said that is early phase. In this treatise I wish to develop WDM-PON Bi-Di Ferrule polishing machine and a polishing technology that use ferule polishing horn in Bi-Di that is an existing technology.