• 한국산학기술학회논문지
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• 제9권3호
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• pp.846-851
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• 2008

본 논문에서는 Bowen의 분화이론과 Frankl의 의미요법의 적용 가능성을 알아보고자 하였다. 의미요법은 Bowen이론의 한계를 보완해 준다. 또한 의미요법이 적용된 자아분화 이론은 내담자들에게 많은 도움을 줄 것으로 예상된다.

• Journal of the Korean Society for Industrial and Applied Mathematics
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• 제7권1호
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• pp.47-61
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• 2003

Two principally different statements of the problem of stable numerical differentiation are considered. It is analyzed when it is possible in principle to get a stable approximation to the derivative ${\Large f}'$ given noisy data ${\Large f}_{\delta}$. Computational aspects of the problem are discussed and illustrated by examples. These examples show the practical value of the new understanding of the problem of stable differentiation.

• 산업기술연구
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• 제18권
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• pp.233-240
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• 1998

In this study, ride sensitivity analysis of train with non-linear suspension elements is performed. Non-linear characteristics of springs and dampers for primary and secondary suspensions of a train is parameterized. Equation of motion of the train model is derived, and using the direct differentiation method, sensitivity equations are obtained. For a nominal ride quality performance index, sensitivity analysis with respect to various design parameters regarding non-linear suspension parameters is carried out.

• Journal of the Korean Society for Industrial and Applied Mathematics
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• 제23권3호
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• pp.179-202
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• 2019

This paper presents second derivative generalized extended backward differentiation formulas (SDGEBDFs) based on the second derivative linear multi-step formulas of Cash [1]. This class of second derivative linear multistep formulas is implemented as boundary value methods on stiff problems. The order, error constant and the linear stability properties of the new methods are discussed.

• 산업경영시스템학회지
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• 제41권2호
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• pp.159-166
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• 2018

The proliferation of information technologies made it possible to produce information products of different versions at much lower cost comparing to traditional physical products. Thus it is common for information product manufacturers to consider vertically differentiated product line for more profit through improved market coverage. Another salient characteristic of most information product is network externality. Existing researches dealing with vertical differentiation and network externality usually assumed oligopolistic market where vertically differentiated products are provided by competing companies, respectively. Moreover, they analyzed the essentially dynamic characteristic of network externality statically. In this study, different from the previous researches, the vertical differentiation strategy of a monopolistic company under network externality is dynamically analyzed. We used a two-period model to accommodate the dynamic feature of network externality. Based on the two-period model, the profit maximizing solutions are analyzed. The results showed that a monopolistic company has no incentive to differentiate products vertically when the network externality is absent. On the contrary, when the network externality exists, the monopolistic company can derive more profit by vertically differentiating the product line. It is also shown that, for more profit, the monopolistic company should keep the quality difference between the high quality product and the low quality product as greater as possible.

• 무역학회지
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• 제44권4호
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• pp.205-220
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• 2019

This article recapitulates the recent changes in trade laws, which may be accentuated due to the intriguing emergence of fortified protectionism and Mega FTAs. It points out the need to formulate not only the corporate strategy for enhancing the product differentiation and architectural capabilities but also the public policy, which comprises the industrial adjustment policy to cope with possible negative impulses caused by the digital trade and foreign direct investment. It is imperative for Korea to facilitate the alignment between corporate strategy and industrial adjustment policy as an effective means of enhancing industrial structure by nurturing those linkage effects between relevant forward and backward industries. Given the drastically volatile trade norms of multi-track trade policies, it may be a pivotal momentum for Korea to pursue a paradigm shift of its trade policy with a prime objective of achieving such an alignment between corporate strategy and industrial adjustment policy, which affords increased value-added and the further development of product or generic technology instead of resorting to the misuses and abuses of economies of scale and production technology for the maximization of export amount.

• 한국산학기술학회논문지
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• 제15권2호
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• pp.845-854
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• 2014

본 연구에서는 남녀 중 고생 총 355명을 대상으로, 청소년의 성별에 따라 부모통제에 대한 지각, 심리 및 행동문제, 그리고 자아분화 수준에 차이가 있는지 알아보고, 부모통제에 대한 지각과 자아분화가 이들의 심리 및 행동 문제에 어떤 영향을 미치는지 분석하였다. 또한, 청소년의 자아분화가 이들의 부모통제에 대한 지각과 심리 및 행동 문제 간, 심리문제와 행동문제 간을 매개하는지 분석하였다. 분석결과, 남학생은 여학생보다 부모심리통제 지각과 심리문제가 더 많고, 여학생은 남학생보다 자아분화가 더 높으며, 행동문제가 더 많았다. 청소년의 자아분화와 부모심리 통제가 이들의 심리 및 행동문제에 유의한 영향을 미쳤으며, 자아분화는 심리 및 행동문제를 높이고, 부모심리통제는 이를 낮추는 것으로 나타났다. 청소년의 자아분화는 부모행동통제와 심리 및 행동문제 간을 완전매개, 부모심리통제와 심리 및 행동문제 간, 그리고 심리문제와 행동문제 간을 부분매개하는 것으로 나타났다.

• 한국산학기술학회논문지
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• 제20권9호
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• pp.420-431
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• 2019

본 연구에서는 다문화 가정 어머니의 자아분화가 학습된 무기력에 미치는 영향에서 양육 스트레스의 매개효과를 검증하고자 하였다. 이를 위해 변인들 간의 상관관계를 조사하고, 다문화 가정 어머니의 자아분화, 학습된 무기력, 양육스트레스 간의 구조적 관계를 확인하기 위해 모형검증을 실시하였다. 연구는 다문화 가정에서 자녀를 양육하는 어머니를 대상으로 설문조사를 실시하여 최종 193부가 자료 분석에 사용되었다. 자료 분석은 SPSS 23.0과 AMOS 23.0 프로그램을 활용하였다. 분석결과는 다음과 같다. 첫째, 다문화 가정 어머니의 자아분화는 양육 스트레스와 학습된 무기력에 부(-)의 유의한 영향을 미치는 것으로 나타났고, 양육 스트레스는 학습된 무기력에 정(+)의 유의한 영향을 미치는 것으로 나타났다. 다문화 가정 어머니의 자아분화와 학습된 무기력의 관계에서 양육 스트레스는 매개효과가 있는 것으로 나타났다. 본 연구를 통해 다문화 가정의 어머니는 문화적 차이와 새로운 사회에 적응해야 하는 환경 속에서 자아분화 수준을 높이는 것이 양육 스트레스와 학습된 무기력을 감소시킬 수 있음을 시사한다.

• Journal of the Korean Society for Industrial and Applied Mathematics
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• 제3권2호
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• pp.161-171
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• 1999

Aerodynamic sensitivity analysis codes are developed via the hand-differentiation using a direct differentiation method and an adjoint method respectively from discrete two-dimensional compressible Navier-Stokes equations. Unlike previous other researches, Baldwin-Lomax algebraic turbulence model is also differentiated by hand to obtain design sensitivities with respect to design variables of interest in turbulent flows. Discrete direct sensitivity equations and adjoint equations are efficiently solved by the same time integration scheme adopted in the flow solver routine. The required memory for the adjoint sensitivity code is greatly reduced at the cost of the computational time by allowing the large banded flux jacobian matrix unassembled. Direct sensitivity code results are found to be exactly coincident with sensitivity derivatives obtained by the finite difference. Adjoint code results of a turbulent flow case show slight deviations from the exact results due to the limitation of the algebraic turbulence model in implementing the adjoint formulation. However, current adjoint sensitivity code yields much more accurate sensitivity derivatives than the adjoint code with the turbulence eddy viscosity being kept constant, which is a usual assumption for the prior researches.

• 대한산업공학회지
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• 제33권3호
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• pp.339-348
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• 2007

Since the 1980s, the marketing paradigm has rapidly changed from product-driven marketing to customer-driven marketing. Recently, due to an increase in the amount of information, customer-differentiation strategies have been emphasized more than product-differentiation strategies. This paper suggests a methodology for new customer segmentation and purchase forecasting using changes in customer behavior. This methodology includes a segmentation method for new customers using existing customer's characteristics and a purchase-forecasting system using the purchase-behavior patterns of existing customers. The proposed methodology not only provides differential services from a segmentation system but also recommends differential items from the purchase forecasting system for new and existing customers.