• 천문학회지
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• 제32권2호
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• pp.83-89
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• 1999

We have conducted a V, I, J, and H surface photometry of a barred galaxy NGC 4314 to analyze the morphology and luminosity distribution of the galaxy. By applying a semi two-dimensional profile decomposition method, we derived the luminosity fractions and the scale lengths of the three distinct components, bulge, disk, and bar: $L_b {\approx}0.35,\;L_d{\approx}0.35,\;L_{bar}{\approx}0.30,\;r_e{\approx}22",\;r_o {\approx} 50"$, and a $\approx$ 60". The bulge of NGC 4314 seems to be triaxial due to the isophotal twists but its luminosity distribution is well approximated by the $r^{1/4}$-law.

• 대한수학회논문집
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• 제13권3호
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• pp.445-459
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• 1998

Let λ be a partition with all distinct parts. In this paper we give a bijection between the set $\Gamma$$_{λ}$(X) of pairs (equation omitted) satisfying a certain condition and the set $\pi_{λ}$(X) of circled permutation tableaux of shape λ on the set X, where P$\frac{1}{2}$ is a tail circled shifted rim hook tableaux of shape λ and (equation omitted) is a barred permutation on X. Specializing to the partition λ with one part, this bijection gives a combinatorial proof of the Schur identity: $\Sigma$2$\ell$(type($\sigma$)) = 2n! summed over all permutation $\sigma$ $\in$ $S_{n}$ with type($\sigma$) $\in$ O $P_{n}$ . .

• Journal of Contemporary Eastern Asia
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• 제14권2호
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• pp.37-44
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• 2015

Many people criticized how the Chinese government responded to the Wenchuan Earthquake. They focused on how it failed to address the psychological needs of the survivors. The study presented here approached this issue from a human resources perspective. It was determined that the Chinese government approached the situation in a bureaucratic way that limited the government's capacity and barred non-profit organizations and community groups from participating. It was also found that survivors could not contact these organizations for psychological support. This study concludes that the situation called for a more flexible and improvised institution that would respond to the emerging needs of survivors.

• Journal of Power Electronics
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• 제14권5호
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• pp.827-833
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• 2014

This study proposes a coupled inductor method for the parallel operation of a power conditioning system (PCS). When primary and secondary currents flow in the same direction in a coupled inductor, total flux and inductance are cancelled; when currents flow in opposite directions, each flux becomes an individual inductor. These characteristics are applied in the parallel operation of a PCS. To connect at a grid code, abnormal current, which is barred under the grid connection code, is blocked by using a coupled inductor. A design based on the capacity and current duration time of a PCS is verified through hardware implementation. Experiment results show the effectiveness of variance reduction.

• 한국전산구조공학회논문집
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• 제15권3호
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• pp.501-510
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• 2002

상자형의 중간격벽은 상자형의 단면변형을 구속하고 상부플랜지에서 발생되는 하중을 양측의 웨브에 분포시키는 역할을 한다. 그러나 상자형의 내부공간이 중간격벽으로 차단될 경우 내부공간을 활용할 수 없으며 유지관리에 많은 어려움을 격게 된다. 상자형의 격벽이 개구부를 갖는 경우 개구부가 없는 경우에 비하여 어떠한 영향을 갖는지를 실험을 통하여 중간격벽의 강성으로 표현하고자 하였다

• Journal of applied mathematics & informatics
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• 제9권1호
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• pp.101-124
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• 2002

The convergence rate of a numerical procedure barred on Schwarz Alternating Method (SAM) for solving elliptic boundary value problems (BVP's) depends on the selection of the interface conditions applied on the interior boundaries of the overlapping subdomains. It hee been observed that the Robin condition(mixed interface condition), controlled by a parameter, can optimize SAM's convergence rate. Since the convergence rate is very sensitive to the parameter, Tang[17] suggested another interface condition called over-determined interface condition. Based on the over-determined interface condition, we formulate the two-layer multi-parameterized SAM. For the SAM and the one-dimensional elliptic model BVP's, we determine analytically the optimal values of the parameters. For the two-dimensional elliptic BVP's , we also formulate the two-layer multi-parameterized SAM and suggest a choice of multi-parameter to produce good convergence rate .

• 천문학회지
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• 제36권3호
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• pp.223-239
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• 2003

It is now a well established fact that galaxies undergo significant morphological transformation during their lifetimes, manifesting as an evolution along the Hubble sequence from the late to the early Hubble types. The physical processes commonly believed to be responsible for this observed evolution trend, i.e. the major and minor mergers, as well as gas accretion under a barred potential, though demonstrated applicability to selected types of galaxies, on the whole have failed to reproduce the most important statistical and internal properties of galaxies. The secular evolution mechanism reviewed in this paper has the potential to overcome most of the known difficulties of the existing theories to provide a natural and coherent explanation of the properties of present day as well as high-redshift galaxies.

• 대한가정학회지
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• 제38권12호
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• pp.85-99
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• 2000

The purpose of this study was to classify consumers barred on satisfaction with electronic commerce and to understand group differences in personal and behavioral characteristics. An on-line survey among hitel users was conducted from August 5th through 14th of 1999 and 678 replies were analyzed. This study identified four groups of consumers based on satisfaction with electronic commerce. They were 'the generally satisfied'. 'the generally dissatisfied', 'the satisfied with e-commerce while dissatisfied with the Internet', and 'the dissatisfied with e-commerce while satisfied with the Internet'. Demographic and behavioral characteristics of the four groups were significantly different. Implications on consumer education, consumer policy, and customer services of e-business were discussed.

• 한국지능정보시스템학회:학술대회논문집
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• 한국지능정보시스템학회 2001년도 춘계정기학술대회
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• pp.445-454
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• 2001

A workflow model is useful fur business process analysis and has often been implemented for office automation through information technology. Accordingly, the results of workflow modeling need to be systematically managed as information assets. In order to manage the modeling process effectively, it is necessary to enhance the efficiency of their reuse. Therefore, this paper creates a Document-barred Workflow Modeling Support System (DWMSS) using a case-based reasoning (CBR) approach. It proposes a system architecture, and the corresponding modeling process is developed. Furthermore, a repository, which consists of a case base and vocabulary base, is built. A carte study is illustrated to demonstrate the usefulness of th is system.

• 한국지구과학회지
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• 제30권1호
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• pp.69-80
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• 2009

본 연구에서는 SDSS DR6을 이용하여 별탄생율과 활동성 은하핵의 막대의 특성, 특히 막대의 세기에 대한 의존성을 조사하였다. 막대의 세기를 보다 잘 표현하기 위하여 막대의 길이와 축비를 이용하여 막대를 6개의 군으로 나누었다. $H{\alpha}$ 방출선 세기로부터 구한 별탄생율은 막대의 세기와 좋은 상관관계를 보였으나 활동성 은하핵은 막대와 또렷한 상관관계를 보이지 않았다. 전자의 상관관계는 막대에 의해 유발되는 가스 유입이 막대의 세기에 의존하기 때문이라고 해석되며, 활동성 은하핵이 막대의 특성과 특별한 상관관계를 보이지 않는 것은 초중량 블랙홀로 들어가는 가스의 양이 막대와 초거대 블랙홀과의 상호 작용에 의해 조절된다는 것을 의미한다. 활동성 은하핵은 주변의 밀도에 의해 영향을 받으나 별탄생율은 주변의 밀도와 무관해 보인다. 이것은 별탄생은 은하에서의 가스 밀도에 의해 결정되는 국지적인 현상인데 반해 활동성 은하핵은 질량이나 광도와 같은 은하의 특성이 밀도-광도관계로 표현되는 은하의 환경 의존성과 밀접한 관계가 있음을 암시한다.