• 인문언어
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• 제7집
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• pp.123-155
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• 2005

This paper concerns different forms of poetic thinking, each of which attempts to investigating truth of being on the ground of its idiosyncratic feature. The horizon evoked via these practices, however, is the Absolute where any plausibility of communication be fundamentally blocked off. Poetry, for instance, relinquishes its semantic auto-referentiality in order to be expressive of something unsayable. Poetic diction, coming-into-being, and sound with no meaning are those three expressive modes that I will examine in terms of the so-called "poetic thinking."

• 산업공학
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• 제15권3호
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• pp.286-296
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• 2002

Products which are sold with warranty, preventive maintenance actions by manufacturers and/or buyers have an impact on the total costs for both parties. In this paper, we develop the models to study the expected warranty cost for products with free repairable warranty with three types of discrete preventive maintenance. We deal with by utilizing the concept that preventive maintenance reduces the virtual age of the system. We assume that the maintenance planning horizon can be segmented into k discrete and equally sized periods. In such a scenario, numerical examples are presented.

• 한국항공우주학회지
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• 제30권2호
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• pp.130-135
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• 2002

• 품질경영학회지
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• 제14권1호
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• pp.61-66
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• 1986

Many papers have suggested various models how to decide an optimal time for replacing equipment. In this study, Dynamic Programming is applied to establish a model of replacing equipment and a new algorithm is developed for computerization to meet the increased number of variables. It is possible to predict the real situation with higher accuracy by employing the proposed model including more variables such as planning horizon, original cost, salvage value, decreasing rate, operating and maintenance costs, increasing rate, and so on.

• 한국품질경영학회:학술대회논문집
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• 한국품질경영학회 2007년도 춘계학술대회
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• pp.503-508
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• 2007

The practice of revenue management has become increasingly important in a number of industries, notably in the airline, hotel, and rental car industries. A common interest of these industries is to maximize their revenue by developing a variety of products from perishable and limited resources over a finite time horizon. This paper provides review of revenue management models and classifies them with 2 different criteria. Finally, this paper concludes with several promising future research topics.

• 한국경영과학회지
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• 제13권2호
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• pp.34-46
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• 1988

This paper deals with design problem of unit load automated storage/retrieval systems (AS/RS). We propose an optimal design model in which the investment and maintenance costs of AS/RS, operating under dual command model is minimized over a time horizon satisfying the warehouse dimensional constraints. The model is formulated as an integer nonlinear program and an algorithm is proposed to find an optimum solution. The valididty of the solution algorithm is illustrated through an example.

• 품질경영학회지
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• 제26권3호
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• pp.1-16
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• 1998

Even though advocates of TQM emphasize the role of TQM more than before, the interest of the public at large have decreased in recent years. In order to explain the perceptual gap between the advocates and general public, three questions were considered: 1) Is TQM a dying fad\ulcorner 2) Does TQM focus on a particular facet of management\ulcorner 3) Does TQM pursue incremental improvement, while reengineering pursue breakthrough innovation\ulcorner It is also discussed how can we extend the horizon of TQM so as to integrate new management theories into the framework of TQM.

• Communications for Statistical Applications and Methods
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• 제17권4호
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• pp.483-491
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• 2010

This study provides the explicit computation of the ruin probability of a Le￠vy process on finite time horizon in Theorem 1 with the help of a fluctuation identity. This paper also gives the numerical results of the ruin probability in Variance Gamma(VG) and Normal Inverse Gaussian(NIG) models as illustrations. Besides, the paths of VG and NIG processes are simulated using the same parameter values as in Madan et al. (1998).

• Journal of Electrical Engineering and Technology
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• 제4권4호
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• pp.566-569
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• 2009

In this paper, we propose a less conservative a linear matrix inequality (LMI) condition for the constrained robust model predictive control of systems with input constraints and polytopic uncertainty. Systems with input constraints are represented as perturbed systems with sector bounded conditions. For the infinite horizon control, closed-loop stability conditions are obtained by using a parameter dependent Lyapunov function. The effectiveness of the proposed method is shown by an example.

• 산업공학
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• 제3권1호
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• pp.21-29
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• 1990

This paper presents a linear programming formulation of the aggregate production planning problem for an optical instrument manufacturing company. Taking into account of the various requirements of the company, an L.P model is developed whose objective is to minimize the total cost of production during the planning horizon. The application results and its implications are well understood by the management and expected to be used as a guide line for future production planning.