• Bulletin of the Korean Mathematical Society
• /
• v.40 no.2
• /
• pp.195-205
• /
• 2003

For the boundary value problem (BVP) of second order functional differential equations for the one-dimensional $\rho$-Laplaclan: ($\Phi$$_{\rho}$(y'))'(t)+m(t)f(t, $y^{t}$ )=0 for t$\in$[0,1], y(t)=η(t) for t$\in$[-$\sigma$,0], y'(t)=ξ(t) for t$\in$[1,d], suitable conditions are imposed on f(t, $y^{t}$ ) which yield the existence of at least two positive solutions. Our result generalizes the main result of Avery, Chyan and Henderson.

• Korean Journal of Fisheries and Aquatic Sciences
• /
• v.41 no.5
• /
• pp.371-380
• /
• 2008

This study elucidated the floral composition of marine algae and community structure at Hallyeo-haesang National Park, on the southern coast of Korea. In all, 89 species, comprising 10 green, 30 brown and 49 red algae, were identified. The dominant species in terms of importance value were Ulva pertusa, Colpomenia sinuosa, Undaria pinnatifida, Padina arborescens, Hizikia fusiformis, Sargassum sagamianum and Amphiroa dilatata. The vertical distribution of marine vegetation was characterized by Enteromorpha linza - Ulva pertusa - Gelidium divaricatum in the upper intertidal zone, Hizikia fusiformis - Sargassum thunbergii in the middle intertidal zone, and Amphiroa spp. - Hildenbrandtia rubra - Corallina pilulifera in the lower intertidal zone. Functional form group analysis showed that coarsely branched forms comprised 50.3% of the algal community, whereas thick leathery forms, sheet forms and filamentous forms comprised 11.9-13.1%. R/P, C/P and (R+C)/P values were 1.91, 0.74 and 2.64, respectively. A cluster analysis of species occurrence suggested that the number of marine algal species differed greatly among the sampling sites.

• Journal of applied mathematics & informatics
• /
• v.7 no.1
• /
• pp.183-193
• /
• 2000

In this paper we use measure theory to solve a wide range of second-order boundary value ordinary differential equations. First, we transform the problem to a first order system of ordinary differential equations(ODE's)and then define an optimization problem related to it. The new problem in modified into one consisting of the minimization of a linear functional over a set of Radon measures; the optimal measure is then approximated by a finite combination of atomic measures and the problem converted approximatly to a finite-dimensional linear programming problem. The solution to this problem is used to construct the approximate solution of the original problem. Finally we get the error functional E(we define in this paper) for the approximate solution of the ODE's problem.

• Journal of Korea Society of Digital Industry and Information Management
• /
• v.12 no.4
• /
• pp.135-143
• /
• 2016

The purpose of this study is to investigate the user's attitude and usage of smart banking application in terms of user's benefits and personalization. While the prior researches on mobile banking adoption focus on the characteristics of service itself, this paper intends to investigate the smart banking application in terms of user's benefits, which are personal value consumers attach to the product or service attributes. Based on prior studies functional benefits, social benefits, experiential benefits, and personalization are identified as affecting factors of the user's attitude and usage of smart banking application. According to the results of multiple regression analysis, all benefit factors(functional benefit, experimental benefit, social benefit) and personalization were found to be significantly related to the user's attitude. Users' attitude on smart banking was found to be significantly related to the real usage as well. This paper has value in that it investigates the attitude and usage of smart banking in terms of benefits.

• KSBB Journal
• /
• v.10 no.5
• /
• pp.547-552
• /
• 1995

Some functional and rheological properties of the ${\gamma}$-polyglutamic acid(${\gamma}$-PGA) produced from alkalophilic Alcaligenes sp. were investigated. Viscosity synergism with thickening agents, capacities for gelling, entrapig of heavy metals, and flocculability of ${\gamma}$-PGA were not observed, but the relatively good compatability with various polyvalent metallic ins, excellent absorption ability and spinability were observed. The ${\gamma}$-PGA solution showed non-Newtonian flow behavior and exhibited pseudoplastic property with a yield stress at above 1% concentration. The values of flow index for 1% solution were in the range of 0.41∼0.75 showing shear rate dependency and the value of yield stress was 2.28 Pa. The value of consistency index was 0.868 Pa$.$Sn and was exponentially dependent on concentration.

• Proceedings of the Korean Society for Emotion and Sensibility Conference
• /
• 1999.11a
• /
• pp.179-184
• /
• 1999

To fill the emotivity in the interior design, the functional factor from the provided space, the aesthetic factor including modeling factor, and even the practical factor from the convenience and the value must be considered. To carry out an achieved design by the emotivity, it must follow the recognition of the original function which comes from the emotivity design method, and it should be applied to the design process fitting into the purpose of the space. The value of the sufficient interior by the emotivity is depended on what kind of image it gives, and how much of the satisfaction it can give to the customers. And fur more, it should not be partially lean to any of the decoration and the function of the object. That is, how faithfully it was to the use and the purpose of the interior and the emotion related to all parts which are the functional side and the decorative side mainly considered in the external form is designed by the essential part of the design.

• Journal of the Korea Fashion and Costume Design Association
• /
• v.7 no.1
• /
• pp.55-63
• /
• 2005

The outcome of modem sports events are reliant on not only the athletic ability and technology of individual players but their sportswear proterties. State-of-the-Hitech sportswear has started to be introduced in the 1950s, and in addition to the athletic capability of players, sportswear is one of the primary factors to affect the results of sports games, as a wide variety of Hi-Tech functional materials have come out since the 1990s. The purpose of this study was to development into the concept of active sportswear, to sort out hitech functional product lines in this field, to look into sports stars and Hi-Tech functional sports brands, and finally to identify the major characteristics of recent active sportswear. The result of this study were as follows: 1. There were largely four characteristics in recent functional sportswear materials: fast-drying cooling, minimized resistance, ultralight comfortableness, and water vapor permeable/waterproof function. 2. Besides the athletic capability and technology of players, Hi-Tech functional products are one of the major factors to determine the outcome of modem sports events. Functional synthetic fiber is preferred, instead of cotton, since the former is easier to manage and retains humidity better. 3. The major features of recent trend in active sportswear products are, functional, diversity and value. That is, those products are functional, since they are easy to manage and retain proper humidity, and they are for multipurpose, since they are fashionable and practical at the same time. And they are valuable, being expensive but appropriate for the movement of the body and having a high quality.

• East Asian mathematical journal
• /
• v.22 no.2
• /
• pp.171-188
• /
• 2006

We consider the problem of an optimal control of the wave equation with a localized nonlinear dissipation. An optimal control is used to bring the state solutions close to a desired profile under a quadratic cost of control. We establish the existence of solutions of the underlying initial boundary value problem and of an optimal control that minimizes the cost functional. We derive an optimality system by formally differentiating the cost functional with respect to the control and evaluating the result at an optimal control.

• Nonlinear Functional Analysis and Applications
• /
• v.26 no.1
• /
• pp.35-64
• /
• 2021

In this paper, we investigate an initial boundary value problem for a nonlinear pseudoparabolic equation. At first, by applying the Faedo-Galerkin, we prove local existence and uniqueness results. Next, by constructing Lyapunov functional, we establish a sufficient condition to obtain the global existence and exponential decay of weak solutions.

• Asia Marketing Journal
• /
• v.5 no.4
• /
• pp.48-71
• /
• 2003

본 논문은 기업들의 점증하는 체계적 브랜드 관리에 대한 필요를 인식하면서 이에 부응하기 위한 하나의 브랜드 관리 시스템을 제안하고자 한다. 일반적으로 전략적인 브랜드 관리는 브랜드자산의 구축, 브랜드자산의 측정과 진단, 브랜드 자산의 관리를 포함한다(Keller 1998). 그러나 이 논문에서 제안하고자 하는 브랜드 관리 시스템인 Brand Value-Up 은 주로 상표 자산의 측정과 진단에 관한 시스템이다. 이 논문에서 Brand Value-Up 을 제안하기 위해 우선 기존의 대표적인 브랜드 관리 시스템들을 검토하였다. 그리고 나서 이들의 미비점들을 분석하였으며, 나아가서 기존 시스템들의 미비점을 보완하는 시스템으로서 Brand Value-Up 을 소개하였다. 또한 Brand Value-Up 은 고객 중심의 브랜드진단 평가모델로서 결과지표 (Awareness Power, Functional Power, Image Power)와 성과지표(Brand Performance)로 구분하여 구체적으로 전략적인 시사점을 얻기 위한 모형으로서 제안하였다. 실제로 주요 국내 브랜드 (21 개 제품 106 개 브랜드)를 대상으로 한 분석을 통해 Brand Value-Up 의 활용 예를 보였으며, 마지막으로 이 시스템이 갖는 마케팅적인 의미와 시사점을 논의하였다.