• 대한수학회보
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• 제52권3호
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• pp.1035-1046
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• 2015

In this work we present some geometric properties (like star-likeness and convexity of order ${\alpha}$ and also close-to-convexity of order ($1+{\alpha}$)/2) for normalized of Lommel functions of the first kind. In order to prove our main results, we use the technique of differential subordinations and some inequalities. Furthermore, we present some applications of convexity involving Lommel functions associated with the Hardy space of analytic functions, i.e., we obtain conditions for the function $h_{{\mu},{\upsilon}}(z)$ to belong to the Hardy space $H^p$.

• 경영과학
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• 제26권2호
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• pp.61-70
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• 2009

This study gives the quality factor evaluation of rubber gloves manufacturing, including a systematic classification of poor durability(internal quality factors) and look bad(external quality factors) as well as the types of defective items, along with the relationship between quality factors and the defective types. The relationship analysis between quality factors and the defective types are performed with AHP(Analytic Hierarchy Process) technique. The results of our study will be useful for quality management activities and manufacturing process in rubber gloves manufacturing companies.

• 대한수학회논문집
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• 제10권2호
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• pp.305-315
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• 1995

The class $R_{\gamma-1,p}(A,B,\alpha)$ for $-1 \leq B < A \leq 1,\gamma > (B -1)p+(A_B)(p-\alpha)/1-B$ and $0 \leq \alpha < p$ consisting of p-valently analytic functions in the open unit disc is defined with the help of convolution technique. We study containment property, integral transforms and a sufficient condition for an analytic function to be in $R_{\gamma-1,p}(A,B,\alpha)$.

• Journal of the Korean Society for Industrial and Applied Mathematics
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• 제22권4호
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• pp.289-294
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• 2018

In this work, a recently developed semi-analytic technique, so called the residual power series method, is generalized to process higher-dimensional linear and nonlinear partial differential equations. The solutions obtained takes a form of an infinite power series which can, in turn, be expressed in a closed exact form. The results reveal that the proposed generalization is very effective, convenient and simple. This is achieved by handling the (m+1)-dimensional Burgers equation.

• 조명전기설비학회논문지
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• 제14권3호
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• pp.59-67
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• 2000

본 연구는 확장하연서도 적용하기 어려운 계통인 인천국제공항 배전계통에 대하여 전력공급제한을 포함하는 종합적언 선협도평가를 하였다. 우선, 계통의 선로제약 및 전압강하를 고려한 평가를 하기 위하여 확정론적인 방법과 고장모드-효과분석법에 지반을 푼 PLOC지법을 도입하고, 신뢰도지수를 계산하었다. 또한 계통의 능력을 평가하고, 신뢰도를 개선하기 위하여 ANP를 도입하였다. 이와같은은 결과로 정확한 신뢰도를 계산하교 취약부분을 찾아내고, 계통의 확장계획을 수립하는 것올 가능하게 하였다.

• 한국컴퓨터정보학회논문지
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• 제7권4호
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• pp.83-88
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• 2002

데이터베이스 설계를 위해 구축된 수많은 개념적 스키마들을 재사용하기 위한 분석수단이 요구된다. 본 논문에서는 개념적 스키마를 분석하는 방법을 제시하고 참조 스키마를 추출하기 위한 스키마 분석을 실험을 하였다. 스키마 통합은 유사함 값이 0.6 이상인 경우에 적용하는 것이 바람직하다. 분석 방법을 통해 생성되는 참조 스키마는 개념을 포괄적으로 표현할 수 있고 스키마 재사용을 위한 수단이 된다. 그리고, 참조 스키마 추출에 필요한 상세한 분석자료를 구하기 위해서는 피쳐를 근거로 스키마를 분석하는 것이 효과적인 수단이 된다.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2000년도 춘계학술대회논문집A
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• pp.170-175
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• 2000

Bimaterial containing an in-plane or an out-of-plane singularity embedded in the inclusion or in the unbounded matrix is first analyzed by using analytic continuation. Next, the series forms of solutions for the trimaterial with two concentric circular inclusions having an identical singularity are found based on an alternating technique using the solution for the bimaterial case. The sum of the first three or four terms of solutions derived provides an excellent approximation for most of material combinations. By applying continuous distributions of dislocations, the trimaterial solution obtained in this study may be used to solve crack problems in the same material.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2001년도 춘계학술대회논문집B
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• pp.410-415
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• 2001

Hydraulic mounts have been used as an alternative to the conventional rubber mounts for they can provide more desirable stiffness and damping properties which may vary with frequency and excitation amplitude. Although a lumped-parameter non-linear model of the hydraulic mount developed by a simple fluid dynamic analysis can be successfully used for representing the inertia track dynamics, a linear model is still preferred. In this paper, an analytic technique for making a linear model of the hydraulic mount is proposed.

• 대한기계학회논문집
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• 제17권11호
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• pp.2773-2781
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• 1993

Laplace's equation is, perhaps, the most important equation, which governs various kinds of physical phenomena. Due to its importance, there have been several numerical techniques such as the finite element method, the finite difference method, and the boundary element method. However, these techniques do not appear very effective as they require a substantial amount of numerical calculation. In this paper, we develop a new most efficient technique based on analytic solutions for Laplace's equation in some convex polygons. Although a similar approach was used for the same problem, the present technique is unique as it solves directly Laplace's equation with the utilization of analytical solutions.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2008년도 춘계학술대회 논문집
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• pp.883-891
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• 2008

The design shows the high-technology of the High Speed Train and its renovated services which is still to be solved. This research presents the process held in approaching the design of the streamline nose using the ‘Image Implementation Technique’. The image that has been brought out through the ‘Image Implementation Technique’ and applied to 'Idea-Creation' and 'Idea-Embodiment' is in order to embody the identity of the nose. We have drawn design and form elements through scientific and analytic approach, bringing up the image of the nose.