• 한국경영과학회지
• /
• 제35권4호
• /
• pp.33-53
• /
• 2010

When purchase prices of a raw material fluctuate over time, the total purchasing cost is mainly affected by reordering time. Existing researches focus on deciding the right time when the demand for each period is replenished at the lowest cost. However, the decision is based on expected future prices which usually turn out to include some error. This discrepancy between expected prices and actual prices deteriorates the performance of inventory models dealing with fluctuating purchase prices. In this paper, we propose a new inventory model which incorporates not only cost but also risk into making up a replenishment schedule to meet each period's demand. For each replenishment schedule, the risk is defined to be the variance of its total cost. By introducing the risk into the objective function, the variability of the total cost can be mitigated, and eventually more stable replenishment schedule will be obtained. According to experimental results from crude oil inventory management, the proposed model showed better performance over other models in respect of variability and cost.

• 한국실내디자인학회논문집
• /
• 제13권4호
• /
• pp.3-11
• /
• 2004

The origin of Uchida is strictly avant-garde and carries a social dimension. The work is a challenge to consumption-oriented mass production, a revolt against intrusive one-way communication, and an aversion to oppressive politics. Such a spirit led to a rare communication design that was created in collabolation with the user and designer, both relating to each other's senses of touch and in the same familiar plane. He first began by focusing on the physical movements of objects in order to achieve maximum comfort and lightness. From the beginning, He avoided strong, sturdy solids, and favored the faint, transitory and vulnerable. He choose the pursue "furniture with delicate lines", "to create darkness by layering shadows", all of which are extremely unique and resulted in designs that have a profound presence. Uchida gives various meanings and functions to the grid. This activities and philosophy of Uchida Shigeru influenced on the interior design.the interior design.

• 한국정보과학회:학술대회논문집
• /
• 한국정보과학회 2005년도 한국컴퓨터종합학술대회 논문집 Vol.32 No.1 (B)
• /
• pp.364-366
• /
• 2005

소프트웨어 개발시 요구사항 협의단계에서 WinWin 협의모델은 이해당사자들이 모두 만족할 수 있는 합의값물 결정하도록 도와준다. 이해당사자들은 각각의 Win 조건을 정의하고, 이것을 품질특성별로 규명한 수치화된 값으로 만든 후 이를 대상으로 협의하여 합의값을 도출한다. 하지만 이같은 합의값을 도출하는 과정에서 모든 이해당사자들이 Win 조건에 도달했는지 설명할 수 있는 방법은 없다. 본 논문은 WinWin 모델에서 이같은 합의값 도출 과정을 규명 가능한 수준으로 만들어 전체적으로 WinWin 모델의 성능이 개선될 수 있다는 것을 제시한다. 각 이해당사자들은 WinWin 모델 내의 합의값 도출과정을 퍼지 합의모델인 OCA(Opinion Changing Aversion)를 이용하여 산출된 합의값의 신뢰도를 평가한다. 평가된 신뢰도를 향상시킬 때까지 반복이 가능하므로 전체적으로 OCA는 WinWin 협의모델의 성능을 개선시킬 수 있다는 것을 증명한다.

• 한국게임학회 논문지
• /
• 제14권4호
• /
• pp.37-44
• /
• 2014

본 논문에서는 행동경제학에서 주로 사용되는 전망이론을 게임 인공지능 분야에 도입하여 인간의 인지적 특성을 사실적으로 표현하고자 하는 관점에서 NPC의 의사결정 모델을 제안한다. 이를 위하여 효용 이론의 한계로 지적되었던 기준점 설정의 문제, 민감도 체감성, 손실 회피의 특징을 분석하고, 이를 게임 상에서의 NPC 의사결정 모델에 반영한다. 본 논문에서는 제안 모델을 동적 지형분석에 적용하였으며, 실험을 통해 NPC의 다양한 개성 부과 및 창발적인 행위를 유도할 수 있음을 확인하였다.

• 한국의류산업학회지
• /
• 제6권4호
• /
• pp.427-432
• /
• 2004

We evaluate what kinds of differences are existed to the visual sensitivity of college students m Daegu and Daejeon. Evaluation used the produced basic pattern to change modeling element of figure, direction, proportion, and color. The results are as below. The circle is preferred to the figure sensitivity and the triangle in Daegu and triangle and quadrangle in Daejeon is disliked. The direction sensitivity shows the difference of preferences according to figure. The angle of $0^{\circ}$ and $90^{\circ}$ which could be felt stability is preferred in general. In proportion sensitivity, the basic figure 1:1 rectangular proportions are preferred. The color sensitivity I shows the differences of preference according to figure and there are difference to the area in the degree of aversion.

• 복식
• /
• 제25권
• /
• pp.201-213
• /
• 1995

The purposes of the study were (1) to seg-ment the female college apparel market based on fashion life style and (2) to develop a pro-file of each segment regard to self-concept, shopping orientation and patronage behavior. The data were collected through questionnaire by random sample of 526 female college students. By cluster analysis of lifestyle factors, three groups were identified, (fashion leaders, fashion followers and fashion aversion) Three groups were then compared through multivariate analysis of variance and chi-square statistics on 10 self-concept variables, 6 shopping statistics on 10 self-concept variables, 6 shopping orientation factors and 1 patronage behavior variable. Significant difference were found among the three groups on all these variables which indi-cate that fashion lifestyle can be a useful base for segmenting female apparel market and these groups are unique in terms of self-con-cept, shopping orientation and patronage behavior.

• 한국의류학회지
• /
• 제18권3호
• /
• pp.395-409
• /
• 1994

Consumers experience various emotional responses to clothing in consumption process. These emotional responses are important in explaining consumer behavior of clothing. The Purpose of the study was to identify the types of emotion that consumers experience in the process of wearing clothes. A questionnaire consisted of 35 words expressing emotion was developed. 110 female college students were surveyed to find out consumption experience of clothing. The empirical study was conducted in two ways. One is that the subjects were asked to respond six-point unipolar scale of emotional adjectives to identify the various emotions that consumers experienced. The other is that four different wearing situations were described for the survey and then the subjects were asked to respond same questionnaire. The data surveyed for research were analyzed by factor analysis. The conclusion of empirical study was as follows. The types of emotion that consumers experienced at various situstions were: pleasure, arousal, unpleasure, aversion, dominance, sandness, security and tension.

• Management Science and Financial Engineering
• /
• 제19권2호
• /
• pp.43-47
• /
• 2013

This paper studies an optimal consumption and portfolio choice problem for unemployed people who have an option to work. Our problem is to find optimal consumption, risky investment, and workforce re-entry strategies for the unemployed. We find a closed form of the critical wealth level to re-enter the workforce. We show that the unemployed with a higher disutility of labor or a larger relative risk aversion are more reluctant to re-enter the workforce.

• Journal of the Korean Society for Industrial and Applied Mathematics
• /
• 제18권4호
• /
• pp.283-294
• /
• 2014

In this paper we study consumption-labor supply decision of an agent who prepares for retirement at a known time in the future. The agent is assumed to have a preference which is represented by the von Neumann-Morgenstern utility function in which the felicity function has constant relative risk aversion over the composite of consumption and leisure. The composite is obtained by the Cobb-Douglas function. A general problem has been studied by Bodie et al. (2004). We contribute to the literature by deriving the Slutsky equations and conducting comparative statics. In particular, we show that wealth effect can exhibit an interesting property depending upon the time until retirement, as the interest rate increases.

• Journal of the Korean Society for Industrial and Applied Mathematics
• /
• 제19권4호
• /
• pp.429-441
• /
• 2015

We study optimal consumption/investment and life insurance purchase rules for a wage earner with mortality risk under regime-switching financial market conditions, in a continuous time-horizon. We apply the Markov chain approximation method and suggest an efficient algorithm using parallel computing to solve the simultaneous Hamilton-Jaccobi-Bellman equations arising from the optimization problem. We provide numerical results under the utility functions of the constant relative risk aversion type, with which we illustrate the effects of regime switching on the optimal policies by comparing them with those in the absence of regime switching.