• 한국운동역학회지
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• 제12권2호
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• pp.65-75
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• 2002

본 연구는 리듬체조를 구성하는 기술 중에서 신체 기본요소군의 Jump에 포함되는 C난도 Ring jump의 3차원 동작분석을 통해 분석하여 선수들의 기술향상과 지도에 필요한 정량적 자료를 제공하는데 목적을 두었다. 이벤트별 소요시간에서는 E-3에서 0.409${\pm}$0.017sec로 가장 긴 소요시간을 보였다. 신체중심의 변위에서는 E-3에서 88.5${\pm}$1.3%로 가장 높은 높이를 보였다. 좌 우 발끝 속도에서는 E-2에서 각각 732.4${\pm}$46.1cm/sec, 1958.4${\pm}$25.1cm/sec로 가장 빠르게 나타났다. 상체후경각에서는 E-3에서 97.8degree로 가장 낮은 각도를 보였다. 슬관절 각변위에서는 E-3에서 좌 우 각각 92.8${\pm}$14.9degree, 69.2${\pm}$5.7degree로 가장 낮은 각도를 보였다. 족관절 각변위에서는 E-3에서 좌 우 각각 171.3${\pm}$6.9degree, 167.9${\pm}$8.4degree로 가장 큰 각도를 보였다. 이런 결과로 볼 때, Ring jump동작을 수행하기 위해서는 족관절의 신전을 통한 높은 점프로 상체를 후경할 수 있는 유연성과 체공을 시간을 갖추는 것이라고 사료된다.

• 한국정보시스템학회지:정보시스템연구
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• 제15권4호
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• pp.171-188
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• 2006

Information technology and the Internet have had a dramatic effect on education method and individual life. Universities and companies we making large investments in e-Learning applications but are hard to pressed to evaluate the success of their e-Learning systems. e-Learning can be seen as not only one of Internet based information systems which can provide education services but also one of teaching-teaming methods which can implement self-directed teaming. This paper tests the updated model of information system success proposed by Delone and McLean using a field study of a e-Learning. The five dimensions - information quality, system quality, service quality, user satisfaction, net benefit - of the updated model are parsimonious framework for organizing the e-learning success metrics identified in the literature. Questionaires are collected from 107 students who are enrolling a e-learning class using online survey. The model is tested using SPSS and LISREL. The results show that information quality and service quality are significant predictors of user satisfaction with the e-Learning system but system quality is not. Also user satisfaction is found to be a strong predictor of the learning performance. This strong association between user satisfaction and teaming performance suggests that user satisfaction may serve as a valid surrogate for teaming performance. Empirical testing of the updated DeLone & McLean model should therefore be extended to cover a wider variety of systems.

• 지질공학
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• 제24권2호
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• pp.171-178
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• 2014

In seismic reflection data processing, the crossdip correction effectively focuses the stacking energy near the sharp bends of a crooked survey line. Additionally, approximate 3-D information on the reflector (e.g., true crossdip angle and lateral continuity) are locally investigated as a by-product of the crossdip correction procedure. Improvement of the signal-to-noise ratio and estimation of reflector crossdip attitude are tested, in terms of both common midpoint bin direction and processing-line type, using synthetic seismic reflection data. To effectively image the reflection energy near bends in seismic survey lines, straight-line binning is preferred to slalom-line binning.

• Journal of electromagnetic engineering and science
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• 제10권3호
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• pp.171-174
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• 2010

In the paper, a printed dual-dipole array antenna is presented. A 4-way planar SIW power divider is adopted for feeding the array antenna. The dual-dipole is adopted as radiation elements which greatly improves the impedance band. The measured bandwidth larger than 31 % for VSWR$\leq$1.5 operating near 14 GHz is achieved and in agreement with the simulated results. The radiation E-plane and H-plane radiation pattern is presented in the paper. The radiation gain is also presented in the paper.

• Asian-Australasian Journal of Animal Sciences
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• 제8권2호
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• pp.171-174
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• 1995

Heteromorphisms of chromosome banding patterns can be useful markers for gene mapping and other kinds of genetic studies. In Japanese quail, the centromere region of chromosome No. 4 is the site of a heteromorphism. One form of the C-band at this region is relatively small ("a" form); an alternative form is much larger ("b" form). To identify the transmission patterns, all possible matings were made between birds with karyotype a/a, a/b, and b/b. The outcome from all crosses are entirely consistent with the expectation from simple Mendelian transmission. No evidence was found for segregation distortion or gametic selection. This dimorphism, therefore, is a reliable marker.

• 전기화학회지
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• 제2권3호
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• pp.171-175
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• 1999

Novel process for high power catalyst electrode for PEM fuel cell has been developed. MEA having this catalyst electrode showed $0.5W/cm^2\;with\;0.2mg/cm^2$ of Pt loading at aunospheric humid hydrogen and oxygen condition. In this process, platinized carbon and plain carbon powders were coated with ionomer (Nafion) and hydrophobic polymer (PTFE), respectively and it could maximize two roles of catalyst electrode, l.e., reaction and gas supplying component. Those polarization characteristics proved the improved performance by reducing potential drop especially in the concentration polarization region.

• Advances in materials Research
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• 제9권3호
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• pp.171-187
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• 2020

The microstructural evolution of different compositions of Mg-Sn alloys (30%Sn-70%Mg, 40%Sn-60%Mg and 50%Sn-50%Mg) is studied at first to understand the changes observed with change in tin content and deformation conditions. The Mg₂Sn phase increases with increase in tin content and a significant substructure development is found in 50%Sn-50%Mg alloy. The above observation led to further deformation studies on Mg₂Sn based thermoelectric materials with higher tin percentage. The microstructure in terms of Electron backscatter diffraction (EBSD)measurements is studied in detail followed by the determination of thermoelectric properties i.e., Seebeck coefficient and electrical conductivity for both as cast and extruded Mg_(2+x)Sn-Ag alloys. The electrical conductivity of the extruded Mg_(2+x)Sn-.3wt%Ag {x =1} alloy was found to be more than its as cast counterpart while the Seebeck coefficient values remained almost the same.

• 한국생물공학회:학술대회논문집
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• 한국생물공학회 2002년도 생물공학의 동향 (X)
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• pp.180-183
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• 2002

Pseudomonns putida BCNU171 had the tolerant ability to several other organic solvents headed by toluene and xylene. Several mutants were made by mating of BCNUl71, pJFF350 to clarify the structure tolerance gene related. From this mutants the 7 of mutants related with toluene sensitive mutants were selected. pBCNUT-2, pBCNUT-4, pBCNUT-9 was transformed, and from this separated plasmid DNA sequences the gene having high homology was searched. In the case of toluene sensitive mutant it was todX gene (pBCNU4) related with cell membrane, ttgE gene (pBCNU2, pBCNU9) and ttgF gene (pBCNU2, pBCNU9).

• 한국진공학회:학술대회논문집
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• 한국진공학회 2007년도 제33회 하계학술대회 초록집
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• pp.171-171
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• 2007

• 대한수학회보
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• 제34권2호
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• pp.155-171
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• 1997

Let $M^n$ be a connected subminifold of a Euclidean space $E^m$, equipped with the induced metric. Denoty by $\Delta$ the Laplacian operator of $M^n$ and by x the position vector. A well-known T. Takahashi's theorem [13] says that $\delta x = \lambda x$ for some constant $\lambda$ if and only if $M^n$ is either minimal subminifold of $E^m$ or minimal submanifold in a hypersphere of $E^m$. In [9], O. Garay studied the hypersurfaces $M^n$ in $E^{n+1}$ satisfying $\delta x = Dx$, where D is a diagonal matrix, and he classified such hypersurfaces. Garay's condition can be seen as a generalization of T.