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성은지 韓國舞踊敎育學會 1994 韓國舞踊敎育學會誌 Vol.4 No.-
Dance is the art form which is expressed One's thought and feelings through the body. for the artistic goa, dancers have to train their body scientifically and efficiently. If dancers practice economically, they can invest their energy and time in choreography or their new pieces along with aesthetic elements. Motor learning theory is regarded as an efficient method of body training. Yet many dance teachers have not believed that this method is appropriate to their dance class, so they depend on customary way of teaching. In this point of view, it is necessary for efficiency of dance lessons to review the researchs of dance used motor learning theory.
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Resin infiltration을 시행한 법랑질 초기 우식 병소의 특성
김은영,권민석,김신,정태성 大韓小兒齒科學會 2012 大韓小兒齒科學會誌 Vol.39 No.1
The concept of resin infiltration which was born in an innovative philosophy to arrest the incipient caries. However, the structural changes of resin infiltrated lesions have not yet explained completely. The liquid resin might contribute not only to maximizing the penetration but to deteriorating physical stability. This study was performed to examine some physical and histological features of resin infiltrated incipient carious lesions. With the specimen of resin infiltrated lesions, microhardness by nanoindentation in depth profile, morphology of resin tags were revealed after HCl dissolution, and degree of microleakage were assessed. The percentage of microhardness of surface layer and lesion body of untreated specimen to sound enamel was 64.6% and 24.6% respectively, while that of resin-infiltrated lesions was 72.1%, showing significant difference (p<0.05). The resin tags observed under SEM had relatively homogeneous length of 433(282~501) ㎛ on the average. Among 20 specimens for microleakage assessment, 13 specimens showed no leakage while 5 and 2 showed leakage into outer and inner half of lesion respectively. It was thought the infiltrant resin penetrates deeply and homogeneously into lesion body and improves its hardness with relatively good physical stability. 본 연구는 infiltrant resin을 침투시킨 초기 우식 병소의 특성을 평가하기 위해 법랑질의 깊이에 따른 경도를 측정하고, 병 소 내로의 레진 침투양상을 분석하며, 미세누출 정도를 관찰하여 다음의 결과를 얻었다. 건전 법랑질에 대한 초기 우식 법랑질의 경도 백분율은 표층(5~40 ㎛) 64.6%, 병소본체(60~350 ㎛) 24.6%였으며, infiltrant resin을 침투시킨 병소의 경도 백분율은 72.1%로 나타났다. 5~350 ㎛의 전 깊이에서, infiltrant resin을 침투시 킨 병소는 비처치 우식 병소보다 경도가 유의하게 높았지만 정상 법랑질에 비해서는 경도가 유의하게 낮았다(p<0.05). FESEM 관찰 결과 탈회된 법랑질 내부로 비교적 균일하게 침투한 레진 테그가 관찰되었으며, 침투깊이는 433 ㎛(282-501)로 측정되었다. 열순환 처리 후 13개의 치아에서 미세누출이 관찰되지 않았고, 5개에서 병소 외측 절반, 2개에서 병소 내측 절 반까지 미세누출이 관찰되었다.
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Sung‑Eun Kim,Jin-Gyu Lee,In-Young Choi,Ha-Eun Kim,Hong-Sub Lee 한국세라믹학회 2020 한국세라믹학회지 Vol.57 No.1
Sneak current is one of the main bottlenecks for dense crossbar array resistive random access memory. This study reports highly non-linear resistive switching characteristic from Ce0.9Y0.1O2/ TiO2 bi-layer (1S/1R device) structure, fabricated by photochemical metal-organic deposition, as a solution for sneak current issue. Ce0.9Y0.1O2 material, possessing oxygen vacancies, was used as a potential barrier as well as oxygen reservoir which rectified the current of low resistance state without an electrical breakdown in 1S/1R device. TiO2 was adopted for resistive switching property, and TiO2 layer having mixed phase (anatase and brookite) showed typical diode switching behavior. The photochemical reaction of photochemical metal-organic deposition process and phase formation were monitored and established using by Fourier-transform infrared spectroscopy and X-ray diffraction, respectively. The 1S/1R device showed highly non-linear resistive switching characteristic, large on/ off ratio of above three orders of magnitude with low operating current.
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성은현,신문기 대한건축학회 2004 대한건축학회논문집 Vol.20 No.9
This research aimed to study the relationships between the divergent thinking, the creative personality, the general knowledge, the knowledge of major field and the ability of architectural design The 191 students majoring architecture In the university in Choong-Nam province participated In tins study The subjects were divided into two groups, high grade (the junior and the senior group) and low grade one (the freshman and the sophomore group) Each group was divided again into two sub-groups according to architectural design ability, high ability group and low ability one We used i-test and stepwise multiple near regression for analysing the data of each group The results were as follows First, m the low grade group, the high ability of architectural design group gamed significantly high scores m the creative personality, the knowledge of major field and the general knowledge than low ability group In the high grade group, the high ability of architectural design group gamed significantly high scores in the creative personality, the divergent thinking, the knowledge of major field and the general knowledges than low ability one Second, m the low grade group, the general knowledge and the knowledge of major field were the significant predictors of the ability of architectural design In the high grade group, the knowledge of major field and creative personality were the significant predictors of the ability of architectural design Finally, limitations of this study and the directions for future research were discussed.
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100m 달리기시 최고 속도 구간과 감속 구간의 동작 비교 연구
은선덕,정철수,배성제 한국운동역학회 1996 한국운동역학회지 Vol.6 No.1
본 연구의 목적은 100m 달리기에서 최고 속도 구간과 감속 구간에서의 동작을 비교하여 감속의 원인을 규명하는 데 있다. 두 구간에 대한 주요 운동학적 변인인 신체 중심의 속도와 변위, 보속과 보폭, 상체의 전경각, 관절각, 각속도를 분석하여 다음과 같은 결론은 얻었다. 감속 구간에서의 지면 접촉 기간 동안과 체공 기간 동안의 신체 중심의 수평 속도는 최고 속도 구간에 비해 느린 것으로 나타났다. 보속은 최고 속도 구간에 비해 느린 것으로 나타났고, 지지 시간은 긴 것으로 나타났으며, 체공 시간은 차이가 나타나지 않았다. 보폭은 최고 속도 구간에 비해 짧은 것으로 나타났고, 착지시 신체 중심과 발끝의 수평 거리는 최고 속도 구간에 비해 긴 것으로 나타났다. 또한 상체의 전경각은 착지시에만 차이가 있었으며 최고 속도 구간에 비해 작고, 무릎 관절각은 착지시와 이지시에 있어서 최고 속도 구간에 비해 작았다. 그리고 고관절각은 반대발의 이지시와 착지시, 그리고 최소값에 있어서 최고 속도 구간에 비해 크고, 운동 범위에 있어서는 작은 것으로 나타났다. 또한 무릎 관절 각속도는 최고 속도 구간과의 비교에서 차이가 나타나지 않았다. The study was conducted to make a comparative analysis of running motion and to examine the difference in the deceleration phase(80∼90m) and the Max-speed phase(30∼40m) during the 100-meter Sprint. In this study, data was analyzed with variables including velocity and displacement of center of gravity, stride frequency, stride length, foward angle of upper body, joint angle, angular velocity in the deceleration phase and the max-speed phase. The conclusions of the study were as follows ; 1. Horizontal velocity of the center of gravity in the deceleration phase was found to be slower than that in the max-speed phase in the supporting period and non-supporting period. 2. Stride frequency in the deceleration phase was found to be slower than that in the max-speed phase, and supporting time n the deceleration phase was longer than that in the max-speed phase, also there was no difference between each phase in nonsupporting time. 3. Stride length in the deceleration phase was to be found shorter than that in the max-speed phase. 4. Horizontal distance between the center of gravity and toe in the deceleration phase was to be found longer than that in the max-speed phase. 5. Forward angle of upper body at the moment of touch down in the deceleration phase was found to be smaller than that in the max-speed phase. 6. Knee angle at the moment of touch down and take off in the deceleration phase were found to be smaller than in the max-speed phase. 7. Hip angle at the moment of touch down and take off of the other foot, and minimum hip angle in the deceleration phase were found to be larger than that in the max-speed phase, and range of, motion in the deceleration phase was smaller than that in the max-speed phase. 8. Knee angular velocity at the moment of touch down of the other foot toward flection in the deceleration phase was found to be larger than that in the max-speed phase.
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성낙창,김은호,문추연,김정권,장성호,김수생,박출재 동아대학교 환경문제연구소 1996 硏究報告 Vol.19 No.1
In this study, we can be obtained the following conclusions about the characteristics of leachate with waste compositions and landfill methods. pH shows a tendency to increase in E. landfill, because NH₃ is created by anaerobic degradation and dissolved in leachate. The concentrations of BOD and COD become different, In case of E. landfill, food of combustible is H. & S. landfill and then SS is high in concentration. According to passed time, T-N is high in concentration, but T-P shows a similar tendency. Heavy metals of leachate is lower than threshold concentrations. If leachate is treated biologically, microbes are not inibitory.
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은성수,이수용 한국항공대학교 1998 論文集 Vol.36 No.-
온도하중이 작용할 때 복합재료 하니콤 샌드위치 쉘 구조물의 거동을 파악하기 위해서 3차원 응축쉘 이론 그리고 일차전단 변형이론에 입각한 유한요소 해석이 수행되었다. 본 연구에서는 하니콤을 탄성보강재로 가정하여 온도가 증가함에 따라 하니콤과 적층쉘 사이에서 발생하는 분리현상을 규명하였다. 이러한 파손현상은 적층각도와 적층쉘 두께이 따라 다르게 나타났다. 준등방성 그리고 직교이방성 보다도 angle-ply 적층순서에서 파손이 많이 발생하였고 또한 적층쉘의 두께가 증가함에 따라 파손현상이 많이 발생하였다. Finite element analysis based on 3-D degenerated shell theory and first shear deformation theory was peformed to investigate the behavior of composite and honeycomb sandwich shell structures under thermal loading. In this study, the honeycomb was regarded as an elastic foundation and delamination phenomenon occurring between the laminated shell and the honeycomb was examined as temperature increases. The results shows that the delamination depends on lay-up angle and thickness in the composite shell. A lot of failure was occurred for angle-ply stacking sequence rather than for quasi-isotropic and cross-ply stacking sequences and a lot of failure was occurred as the thickness of the composite shell increases.
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