• 천문학회지
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• 제38권2호
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• pp.23-31
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• 2005

CN and CH band strengths for fourteen bright giants in the globular cluster M71 have been measured from archival spectra obtained with the Multiple Mirror Telescope. Adding the collected. data from the literature we confirm a bimodality of CN distribution on the red giant branch and the honzontal branch, and CN-CH anti-correlations on the lower giant branch and horizontal branch. However a CN-CH anti-correlation on the upper red giant branch is not quite clear as those of other branches. The small number If statistics could not be excluded as a possible cause. To confirm this, a greater number of sample stars are needed. We also confirm that the ratio of CN-strong to CN-weak stars is quite different from that in 47 Tuc, although the anti-correlation between CN and CH bands, the bimodality of the CN distribution, and the spatial distribution of CN stars in M71 are found to be similar to those III 47 Tuc.

• 한국분무공학회지
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• 제20권1호
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• pp.1-6
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• 2015

Visualization of the mixing pattern in a non-element mixer was carried out using laser induced fluorescence(LIF) to evaluate characteristics of mixer consisting of the main flow pipe and branch flow pipes. The branch flows were injected periodically with the period $T_{in}$ normal to the main flow, and rhodamine B was mixed into the most upstream branch flow to visualize mixing pattern in the main flow pipe by LIF. The length of boundary line L of the LIF image was measured. In this study, a numerical analysis was performed to identify the mixing process of the non-element mixer, and the results were compared with experimental results. Each result was almost the same. When the number of branch flows is increased, the mixing pattern became complicated and was supposed to become chaotic. The length of boundary line L increased exponentially with an increase in the number of branch flows.

• 한국잠사곤충학회지
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• 12호
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• pp.1-4
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• 1970

뽕나무의 정엽중 즉 수량을 예측하고 수량과 제형질과의 관계를 알고자 우리나라 상수주요품종 4품종을 재료로 상수의 8개형질상호간의 유전상관, 표현형상관 그리고 환경상관을 계산한바 그 결과를 요약하면 다음과 같다. 1. 각형질상호간의 표현형공분산, 유전공분산 그리고 환경공분산을 계산한 바 제1표와 같이 표현형공분산은 유전공분산의 값과 근사하나 다소 높고 환경공분산의 값은 그 변동이 심하다. 2. 각형질상호간의 유전상관, 표현형관계 그리고 환경상관 등은 계산한바 제2표와 같이 유전상관은 표현형상관보다 그 값이 높고 지조장과 주당지수간, 주당지수와 지총중간에 1이상의 이상치가 보였다. 3. 지조직경과 제형질상호간에는 어느 경우에 있어서도 상관의 정도가 낮고, 정엽중 즉 수량과 제형질간의 상관관계를 본바 수량과 지조직경간에는 그값이 낮으나 기타 제형질은 수량과 높은 상관관계를 보였다. 뽕나무의 제형질중 예취전에 측정할 수 있는 지조장, 절간수, 지조직경, 주당지수의 4개형질이 수량의 예측이나 선발대상형질로서 중요한 형질이나 본실험의 결과 지조직경은 수량과 상관의 정도가 낮고, 주당지수는 전보의 결과에서 유전력이 낮았으므로 지금까지의 결과로는 지조장과 절간수가 더욱 중요한 형질로서 취급하여야 할 것으로 믿으며 이들 형질들과 수량과의 직접효과와 간접효과를 구명하여 보는 것이 앞으로 남은 한 과제가 될 수 있을 것으로 믿는다.

• 한국문헌정보학회지
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• 제31권1호
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• pp.231-256
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• 1997

대학도서관의 분관설치는 이용자들에게 봉사의 편의를 제공하고 이용자들의 장서접근을 용이하게 하여 궁극적으로 이용율을 높이기 위함이다. 본 연구는 한국 대학도서관에 설치된 분관들이 현재 어떤 상태이며 소기의 목적을 성취하고 있는지를 조사하여 밝히기 위해 한국 대학도서관 분관들의 운영실태를 조사하고 분관의 설치로 이용율의 증가가 일어나고 있는지를 집중적으로 조사하였다. 본 연구의 목적은 (1) 한국의 대학도서관의 분관을 설립하는데 있어서 보편적인 경향을 확인하는 것과 (2) 분관이 대학도서관 전체 이용율에 끼치는 효과를 조사하는 것이다. 이러한 목적을 달성하기 위하여. 본 연구는 도서관장서규모와 학생수, 대학의 역사, 학과수, 중앙도서관의 면적, 도서관 예산과 분관과 상호관련성에 대해 초점을 맞추어 6개 분간을 가진 2개 도서관. 3개의 분관을 설치한 2개의 대학도서관, 분관이 없는 2개 대학도서관등 6개의 대학도서관들을 선택하여 조사하였다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제17권9호
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• pp.2483-2504
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• 2023

Most existing low-light enhancement algorithms either use a large number of training parameters or lack generalization to real-world scenarios. This paper presents a novel lightweight and robust pixel-wise polynomial approximation-based deep network for low-light image enhancement. For mapping the low-light image to the enhanced image, pixel-wise higher-order polynomials are employed. A deep convolution network is used to estimate the coefficients of these higher-order polynomials. The proposed network uses multiple branches to estimate pixel values based on different receptive fields. With a smaller receptive field, the first branch enhanced local features, the second and third branches focused on medium-level features, and the last branch enhanced global features. The low-light image is downsampled by the factor of 2b-1 (b is the branch number) and fed as input to each branch. After combining the outputs of each branch, the final enhanced image is obtained. A comprehensive evaluation of our proposed network on six publicly available no-reference test datasets shows that it outperforms state-of-the-art methods on both quantitative and qualitative measures.

• 설비공학논문집
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• 제18권7호
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• pp.603-611
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• 2006

A variety of schemes were sought for a mitigation of thermal stratification phenomenon in the branch piping of domestic nuclear power plant. Several mechanisms of thermal stratification occurrence were introduced in this paper. A number of factors were selected to find out the schemes for thermal stratification mitigation and the computational analysis were performed. The length of vertical branch piping, the diameter, the radius of curvature of the elbow, the direction of connection between main piping and branch piping, the slope of branch piping, the leakage flow rate, the installation of additional valve, the change of the 1st valve position and another branch piping connected with branch piping were mentioned as factors in this paper.

• 한국수학교육학회지시리즈B:순수및응용수학
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• 제23권3호
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• pp.319-328
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• 2016

In this paper, we solve the additive ρ-functional inequalities (0.1) ||f(2x-y)+f(y-x)-f(x)|| $\leq$ ||${\rho}(f(x+y)-f(x)-f(y))$||, where ρ is a fixed complex number with |ρ| < 1, and (0.2) ||f(x+y)-f(x)-f(y)|| $\leq$ ||${\rho}(f(2x-y)-f(y-x)-f(x))$||, where ρ is a fixed complex number with |ρ| < $\frac{1}{2}$. Using the direct method, we prove the Hyers-Ulam stability of the additive ρ-functional inequalities (0.1) and (0.2) in β-homogeneous F-spaces.

• Journal of applied mathematics & informatics
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• 제28권1_2호
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• pp.539-551
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• 2010

Low scalability and power efficiency of the shared bus in SoCs is a motivation to use on chip networks instead of traditional buses. In this paper we have modified the Orion power model to reach an analytical model to estimate the average message energy in K-Ary n-Cubes with focus on the number of virtual channels. Afterward by using the power model and also the performance model proposed in [11] the effect of number of virtual channels on Energy-Delay product have been analyzed. In addition a cycle accurate power and performance simulator have been implemented in VHDL to verify the results.

• 대한산업공학회지
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• 제33권2호
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• pp.213-220
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• 2007

This paper considers a two-stage hybrid flow shop scheduling problem for the objective of minimizing the number of tardy jobs. Each job is processed through the two production stages in stages, each of which has multiple identical parallel machines. The problem is to determine the allocation and sequence of jobs at each stage. A branch and bound algorithm that gives the optimal solutions is suggested that incorporates the methods to obtain the lower and upper bounds. Dominance properties are also suggested to reduce the search space. To show the performance of the algorithm, computational experiments are done on randomly generated problems, and the results are reported.

• Structural Engineering and Mechanics
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• 제34권1호
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• pp.85-95
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• 2010

In this paper, numerical solution of the singular integral equation for the multiple curved branch-cracks is investigated. If some quadrature rule is used, one difficult point in the problem is to balance the number of unknowns and equations in the solution. This difficult point was overcome by taking the following steps: (a) to place a point dislocation at the intersecting point of branches, (b) to use the curve length method to covert the integral on the curve to an integral on the real axis, (c) to use the semi-open quadrature rule in the integration. After taking these steps, the number of the unknowns is equal to the number of the resulting algebraic equations. This is a particular advantage of the suggested method. In addition, accurate results for the stress intensity factors (SIFs) at crack tips have been found in a numerical example. Finally, several numerical examples are given to illustrate the efficiency of the method presented.