철봉 어깨 틀어 휘돌아 다시 잡기(el-grip swing with one turn to el-grip) 동작의 운동학적 분석

김재필 한국운동역학회 2003 한국운동역학회지 Vol.13 No.1

Kim, J-P. Kinematical Analysis of El-grip swing with 1turn to el-grip in horizontal bar. Korean Journal of Sport Biomechanics, Vol. 13, No. 1, pp. 51-62. This study was attempted to kinematical characteristics of the El-grip swing with 1turn to el-grip in elite horizontal bar for the purpose of improving performance. The subjects were three males who were 2002 Busan Asian Games in men's team. The three dimensional motion analysis with DLT method was executed using three video cameras of analyzing the actual competition situation. In point of analyzing the actual competition situation, it is expected that gymnastics and coaches have the effective informations, and the following conclusion had resulted. 1. In case of release, It is impotant to make fast horizontal velocity of CM, high vertical position of CM, large hip and shoulder angle. Also It should be performed release motion of trunk rotation angle(+). 2. During LHR the action should be made at higher position than the CM and the shoulder joint is moving within 127±16.82. It is important to make large trunk rotation angle. 3. During Hop, the RHR motion should be done in high position with short time and fast twisting action and to reduce the vertical speed is important.

開放化時代의 우리나라 保險産業 成長戰略

김재필,박성호 昌原大學校 産業經濟硏究所 1994 産經硏究 Vol.11 No.-

엘리트 높이뛰기 선수들의 발구름 동작에 관한 운동학적 분석

김재필 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.1

This study was attempted to kinematical characteristics of the take-off motion in elite high jumpers for the purpose of improving jumping height. The subjects were three males who were 2002 Busan Asian Games medalist in high jump. The three dimensional motion analysis with DLT method was executed using three video cameras of analyzing the actual competition situation. In point of analyzing the actual competition situation, it is expected that high jumpers and coaches have the effective informations, and the following conclusion had resulted. The take-off time shows that this study was longer than the other former studies. This result comes from wet ground condition, because of cold day. The ratio of height that center of gravity was 52.8±4.3 % in touch-down phase and 72.3±5.3% in take-off phase. Also vertical height of increasing between touch-down and take-off was 19.5±1.5%, maximum height was 124.3±2.8%. In order to improve jumping height the vertical and medial-lateral velocity of center of gravity should be increased as possible. And the lead leg and both arms contribute to the increase of center of gravity's velocity. It is appeared that the knee joint angle the lead leg at touch-down phase 162.2±8.89 degree, at take-off phase was 167.7±8.38degree, the angle of maximum flextion was 174.0±3.58 degree. The take-off leg were 117.4±10.6, 66.9±8.0, 146.8±13.1degree respectively.

칼슘과 아연으로 치환된 Y0.8 Pr0.₂ Ba₂ Cu₃ O7_δ 의 전기 및 자기적 성질에 관한 연구

김성재,전인,박영민,강재필,노태호,박현진,최숙자,송승기 명지대학교 자연과학연구소 1996 자연과학논문집 Vol.14 No.-

전이온도가 72K인 고온초전도체 Y?P?B?Cu?O?에서 초전도성을 감소시키는 Pr원소자리에 Ca과 Zn를 적당히 치환시켜 자기적 성질을 연구하였다. 초전도 전이온도(Tc)는 Ca이 치환된 시료의 경우 80~85k의 범위에서 측정되었으며, Zn가 치환된 경우에는 35~49K의 값을 보였다. 비저항의 온도 변화로부터 결정된 전기적 전이온도는 온도에 대한 자기모우먼트으 변화에서 구한 자기적 전이온도와 비슷한 값을 보였다. 자기이력곡선으로부터 Bean의 모델을 이용하여 Hcl(저임계자기장), Hc?(고임계자기장), 반자성정도, 임계전류밀도를 측정하였다. 이러한 성질들은 시료 내에 Ca의 치환량이 많아질수록 증가하였으며, Zn가 많아질수록 급격히 감소하였다. 특히 임계전류밀도는 x=0.0인 시료는 1.60x10?A/㎠이었으며 Ca이 치환된 시료는 1.30~1.98x10? A/㎠, Zn가 첨가된 시료는 3.5x10?~1.3x10?A/㎠의 값으로 계산되었다. 이것은 시료 내에서 Ca은 초전도성을 증가시키고, Zn는 초전도성을 감소시키는 것을 의미한다. We have studied magnetic properties as a appropriate substitute of Ca and Zn element for Prelement which reduces superconducting properties in the high-temperature superconductor Y?Pr?Ba?Cu?O? of transition temperature 72K. When Ca is put into, the critical temperature(Tc)showed the value of measurement at the range of 80~85K while for Zn the Tc had the range of 35~49K. The electric critical temperature determined by the temperature dependence of resistivity had a similar data to the magnetic field), Hc?(high critical magnetic field), diamagnetic ratio and critical current density have observed by Bean's model from the magnetic hysterisis curve. These properties were increased with adding Ca and abruptly decreased with adding Zn in the samples. Especially, the critical current density of x=0.0 sample was calculated at 1.60x10?A/㎠ and those of the other Ca-added samples at the range of 1.30~1.98xA/㎠and those of Zn-added samples at the range of 3.50x10?~1.30x10?A/㎠. These mean that Ca increases supercondecting properties in the sample and Zn element decreases them.

고온 초전도체 Y Pr Zn Ba₂Cu₃O의 자기적 성질

김성재,박영민,노태호,전인,강재필,송승기 명지대학교 자연과학연구소 1995 자연과학논문집 Vol.12 No.-

전이 온도가 72K인 Y?Pr?-Zn?Ba?Cu?O?고온 초전도체에 초전도성을 약화시키는 Pr 원소와 Zn를 적절한 비율로 치환하여 자기적 특성을 연구하였다. Zn가 첨가되었을 때의 임계온도(전이온도)는 35~ 44K의 값을 나타내었다. 온도에 대한 비저항의 측정으로 구한 전기적 임계온도와 온도 대 자기 모우먼트 측정으로 구한 자기적 임계온도 값은 거의 비슷했다. 자기이력 곡선으로부터 H?(저임계자기장), H?(고임계자기장)와 반자성 정도를 구했으며, Bean의 모델을 이용하여 임계전류밀도를 구하였다.이러한 자기적 성질들은 시료에 Zn가 첨가되자 급격히 감소되었다. 임계전류밀도의 경우 x=0.0인 시료가 1.6x 10?A/㎠으로 계산되었고, Zn가 첨가된 다른 시료의 임게전류밀도는 3.5x10?~1.3x10?A/㎠범위의 값을 나타내었다. 이것은 시료내에서 Znr가 초전도성을 급격하게 감소시킴을 의미한다. We have studied magnetic property as a substitute appropriate propertation of Zn element for Pr element which reduces superconducting property in high-temperature superconductor Y?Pr??Zn?Ba?Cu?O?? of transition temperature 72K, When Zn is put into it, critical temperature showed the value of measurement at th range of 35 ~44K. The electric critical temperature determinded by the temperature dependence of resistivity had a similar data to the magnetic citical temperature determinded by the temperature dependence of at the range of 35 ~ 44K. The electric critical temperature determined by the temperature dependence of resistivity had a similar data to the magnetic critical temperature determined by the temperature vs. magnetic moment. H?(critical low mgnetic field ), H?(critical high magnetic field), diamagnetic ratio and critical current density calulated by Bean's model from the magnetic hysterisis curve. These properties were abruptly decreased with adding Zn in the samples, Especially , the critical current desity of x=0.0 sample was calculated at 1/6x 10?A/㎠.These mean that Zn in the sample decreases superconduting properties in the sample.

감자를 첨가한 기능성 크림수프의 품질 특성

한경필,한재숙,소기신행,김동석,박미란,이갑랑 한국조리과학회 2005 한국식품조리과학회지 Vol.21 No.1

The purpose of this study was to investigate the quality characteristics of potato added functional cream soup. The highest crude protein (p<.01) and crude lipid (p<.001) were for the potato soup with added potato peel (S₃). The highest pH of 5.95 was for the potato soup with added potato peel (S₄). The highest lightness of 69.46(1, value) was for the potato soup with added potato peel (S₃) (p<.01). The redneess(a value) and yellowness(b value) were increased by the adding of potato peel to the potato soup(p<.01). Viscosity was increased by potato content, and was the highest for the potato soup (S₂) (p<.001). The glycoalkaloid content of the potato soup with added potato peel was 175 mg and 2.20 mg, for Si and S4 respectively. In sensory evaluation. the highest sensory scores for flavor and taste (p<.05) of mean 3.55 and 3.45, respectively, were obtained from the potato soup with added potato peel (S₄). The highest overall acceptability of mean 3.00 was for the potato soup with added potato peel (S₃) (p<.01).

판진동이론에 의한 바닥판의 사용성에 관한 연구

노필성,김재웅 동아대학교 환경문제연구소 2003 硏究報告 Vol.25 No.2

The necessity of evaluating floor serviceability is due to the fact that, with the trend toward using lighter and more flexible construction materials, excess vibration can occur under normal human activity loads, resulting in human discomfort and sometimes, unsafe condition. The complexity of the exact floor vibration computations has prompted investigators to use simplified model such as beam, equivalent SDOF and so on. This paper prefers plate itself for vibration analysis rather than above and compare results with that of other studies and floor vibration criteria.

능동질량감쇠기에 의한 구조물의 진동조절

盧泌成,金在雄 동아대학교 환경문제연구소 1997 硏究報告 Vol.20 No.1

For the control of building to external dynamic forces created by the wind or earthquake, many structural control method has been studied. Among those, a closed-loop feedback control algorithm is proposed for the control of a building using an active tuned mass damper. The passive-control device properties, including the stiffness and damping constants of the tuned mass damper and the gain coefficients of actuator, are derived by minimizing the displacement variance of the building. The results show that the control efficiency of the ATMD based on the velocity feedback depends on the passive-control-device properties assumed. Also, the ATMD with optimal passive properties using complete feedback results in further reduction in the structural displacement, the control force required is smaller using complete feedback.

흰쥐 부정소 상피세포의 미세구조

주재수,김종세,조광필,김생곤 조선대학교 부설 유전생물공학연구소 1992 유전생물공학연구지 Vol.2 No.-

The epithelia of epididymis are composed of principal cells, basal cells, light cells and narrow cells. The principal cells are secretory cells that Golgi complex and rough endoplasmic reticulum were well developed in the cytoplasm. The light cells are secretory cells which exist in the corpus and cauda of the epididymis. It is observed the number of secretory granules in the cytoplasm. The basal cells are situated on the basal membrane. In proportions to cytoplasm, it has large nucleus and. a few cell organelles exist in the cytoplasm. The narrow cells have several secretory vesicles and electron-dense cytoplasm. It is suggested that narrow cells are degenerating cells.

77K와 상온에서 CO(NH₂)₂의 ¹⁴N Pulsed NQR 연구

강재필,박영민,전인,김성재,최숙자,박현진,송승기,서용문 명지대학교 자연과학연구소 1996 자연과학논문집 Vol.13 No.-

77K와 상온에서 CO(NH₂)₂분말 시료의 ??N Pulsed NQR실험을 하여 위와 아래 공명 진동수, 핵 사중극 결합상수, 비대칭 인자, 스핀-스핀 완화시간, 결정 격자 진동에서의 평균 비틀림 진동수, 진동자의 관성 모먼트 등을 구하였다. 공명 진동수의 온도 의존성은 전형적인 Bayer이론의 격자 진동에 의한 주파수 변화를 보였다. Bayer-Kushida이론의 고온근사식을 실험값에 적용하여 OK에서 공명 진동수 ν??와 ν??를 구했으며, 77K와 상온에서의 스핀-스핀 완화시간 T₂를 관측했다. 상온에서 T₂의 감소는 결정 내의 reorientation motion과 관련이 있을 것으로 보인다. Upper and lower resonance frequencies, nuclear quadrupole coupling constants, asymmetry parameters, spin-spin relaxation time, average torsional frequency in the crystal lattice motion and moment of inertia in the oscillator are found for CO(NH₂)₂powder sample by using ??N Pulsed NQR(Nuclear Quadrupole Resonance) technique at 77K and room temperature. Temperature dependence of resonance frequencies showed frequency variation in agreement with the typical Bayer's theory in lattice motion. Resonance frequencies ν?? and ν?? at OK were obtained by fitting the high temperature approximation of Bayer-Kushida theory to the experimental data and spin-spin relaxation time (T₂) was observed at 77K and room temperature. Decrease of T₂at room temperature was explained by the effect of reorientational motion in the crystal lattice.