• 대한기계학회논문집B
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• 제22권7호
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• pp.1030-1040
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• 1998

One of the main unresolved issues in large-eddy simulation(LES) of wall-bounded turbulent flows is the requirement of high spatial resolution in the near-wall region, especially in the spanwise direction. Such high resolution required in the near-wall region is generally used throughout the computational domain, making simulations of high Reynolds number, complex-geometry flows prohibitive. A grid-embedding strategy using a nonconforming spectral domain-decomposition method is proposed to address this limitation. This method provides an efficient way of clustering grid points in the near-wall region with spectral accuracy. LES of transitional and turbulent channel flow has been performed to evaluate the proposed grid-embedding technique. The computational domain is divided into three subdomains to resolve the near-wall regions in the spanwise direction. Spectral patching collocation methods are used for the grid-embedding and appropriate conditions are suggested for the interface matching. Results of LES using the grid-embedding strategy are promising compared to LES of global spectral method and direct numerical simulation. Overall, the results show that the spectral domain-decomposition grid-embedding technique provides an efficient method for resolving the near-wall region in LES of complex flows of engineering interest, allowing significant savings in the computational CPU and memory.

• 디지털융복합연구
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• 제18권7호
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• pp.375-381
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• 2020

본 연구는 모빌리티 패러다임 변화에 대응하는 미래의 모빌리티 서비스전략 방향성 도출을 위해 밀레니얼 세대가 인식하는 이동의 의미를 알아보기 위해 진행되었다. 이를 위해, 시대변화에 따른 모빌리티의 개념을 이해하고, 관련 사례를 분석하였다. 변화의 주체인 밀레니얼 세대의 특징을 이론적으로 정리하고, 한국 밀레니얼 세대 25명을 대상으로 인뎁쓰 인터뷰를 진행하여 이동에 대한 감성언어와 이미지를 분석하였다. 연구결과, 이들에게 모빌리티는 단순한 이동이 아닌 즐거운 경험이 있는 이동을 의미하며, 삶을 고급스럽게 만드는 모빌리티 라이프로서 감성을 만족시키는 경험재로 그 의미가 확장되고 있음을 알 수 있었다. 이들을 만족시키는 모빌리티 서비스전략 수립을 위해서는 첫째, 각기 다른 감성에 맞춘 모빌리티 라이프를 큐레이션하는 노력이 필요하며, 둘째, 감성을 담아낸 언어와 이미지를 서비스로 보여주는 전략이 필요하고, 셋째, 다양한 영역과의 연결을 통해 구현될 미래 모빌리티 라이프를 리딩하는 전문가의 역할이 필요하다. 본 연구가 미래 모빌리티 서비스전략 수립을 위한 기초자료로 활용되길 기대한다.

• 경영과정보연구
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• 제17권
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• pp.135-160
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• 2005

In the 1990s, university environment is changing rapidly(especially, difficulty of student registration which are originated student's decrease and various deregulation) and university get ready for the new ways of management culture. This new ways are management innovation strategies. The purpose of this study is to suggest the direction of effective innovation(to search application possibility of management innovation strategy), solving the problems occurred by the enlargement and change in the environments of universities. From early in the 1990s, korean corporations perform actively many management innovation strategy including benchmarking, restructuring, downsizing, zero-based budgeting, BPR, learn organization and total quality management. But korean most universities performed hardware management innovation strategies such as corporate portfolio restructuring(including outsourcing, M&A, MBO etc.) and organization restructuring. Therefore korean universities have got to concerns about more software management innovation strategy such as total quality management and learn organization. Also we have seen another problems such as that universities try to merely duplicate certain management innovation strategies which are used by another university. rather than to make various effort to adequate their own organizations. In conclusion, korean universities are to play an important roles in the development of knowledge society. The management innovation and individual competence development in the university are required to overcome crisis of university.

• Journal of Astronomy and Space Sciences
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• 제36권4호
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• pp.235-248
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• 2019

This paper suggests a relative orbit control strategy for the CubeSat Astronomy by NASA and Yonsei using Virtual Telescope Alignment eXperiment (CANYVAL-X) mission whose main goal is to demonstrate an essential technique, which is an arrangement among two satellites and a specific celestial object, referred to as inertial alignment, for a next-generation virtual space telescope. The inertial alignment system is a relative orbit control system and has requirements for the relative state. Through the proposed orbit control strategy, consisting of separation, proximity keeping, and reconfiguration, the requirements will be satisfied. The separation direction of the two CubeSats with respect to the orbital plane is decided to provide advantageous initial condition to the orbit controller. Proximity keeping is accomplished by differential atmospheric drag control (DADC), which generates acceleration by changing the spacecraft's effective cross section via attitude control rather than consuming propellant. Reconfiguration is performed to meet the requirements after proximity keeping. Numerical simulations show that the requirements can be satisfied by the relative orbit control strategy. Furthermore, through numerical simulations, it is demonstrated that the inertial alignment can be achieved. A beacon signal had been received for several months after the launch; however, we have lost the signal at present.

• 경영과정보연구
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• 제13권
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• pp.27-47
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• 2003

The strategic usages of IT(Information Technology) can convey important competitive advantages with an operational productivity. For this reason, many firms have heavily invested in IT and computing power. However, many companies were getting expected results by IT investment, but some companies had to be satisfied with a poor results. The question of whether or not benefit lead to expected performance is not easy to answer. The purpose of this study was to investigate the relationship among IT strategy, IT investment, and IT performance to resolve this problem. The 147 questionnaire responses completed by IS managers in manufacturing sector was conducted for a test of research hypothesis. ANOVA was used to investigate the relationship among three constructs and six factors. An operational performince of fitted group between IT strategy and IT investment was higher than not fitted group(H1). And also an competitive performance of fitted group between IT strategy and IT investment was higher than not fitted group(H2). The study shows a positive relationship between IT strategic orientation, IT investment direction, and performance of IT. The research results provide empirical evidence that supports the research hypothesis that closer fit between IT strategies and IT investment directions does lead to increase operational and competitive performance of IT.

• 디자인학연구
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• 제13권2호
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• pp.123-132
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• 2000

일러스트레이션은 자연이나 사물을 다방면으로 분석하여 객관적인 미적 형상을 끄집어내는 작업이다. 이것은 주제를 보다 명확하게 시각화하여 정확한 목표대상에게 효율적으로 전하는데 목적이 있다. 특히 3-D 일러스트레이션은 다양한 재료와 복잡한 기법으로 인하여 표현자체가 난해해질 수 있는 만큼 주제를 보다 명확히 할 필요가 있다. 이를 이해서 3-D 일러스트레이션의 모든 작업은 전략에 의하여 과학적이고 합리적으로 진행되어야 한다. 본 연구는 출판 및 광고 현장에서 다양하게 활용되고 있는 일러스트레이션 중에서 3-D 일러스트레이션을 선정, 그 개념을 명확히 하고 표현전략에 의한 일러스트레이션 제작 과정을 정립함으로써 전략의 중요성을 강조하였다. 또한 효율적인 일러스트레이션 조건을 제시하여 보다 체계적이고 합리적인 3-D 일러스트레이션 표현전략 수립에 도움이 되고자 하였다

• 경영과학
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• 제26권1호
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• pp.37-51
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• 2009

Korean IT industry has been given much weight in national R&D management. A negative side of this fact is that Korean economy is likely to become vulnerable to a condition of the export business in certain items of IT industry which has a serious influence on the national economy. A customized investment strategy through the analysis of technology competitiveness and R&D status in each technology of IT field is required in order to rectify the structural vulnerability and pursue a continuous growth. In this research, a strategic direction to set up an efficient investment strategy is presented. In this process, it draws a portfolio analysis with two axes of technology level and technology life cycle. It also derives a priority order of the national investment considering the degree of technological impact, marketability, and adequacy of public support from AHP (Analytic Hierarchy Process) method by a survey of IT experts. A portfolio analysis in the prior stage helps the respondents in AHP become more familiar with the alternatives' characteristics so that their decision making process more corresponds with national R&D strategies.

• 품질경영학회지
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• 제45권4호
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• pp.611-628
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• 2017

Purpose: This paper deals with establishing Korean national standardization policy through a comparative trend analysis of national standardization strategies and each nation's policy environment. It first investigates the standardization strategies including Korea, the United States, Japan and Germany which is currently leading the 4th Industrial Revolution. Methods: This study compares and analyzes national standardization policies that synthesize the determinants of national standard activities using the STEEP, PEST analysis used for policy environment analysis, and National Standardization Model Canvas(N-STD Model Canvas) applying business model canvas. Results: This study confirms the reasoning and operating system of establishing national standard strategy reflecting the social, economic and political situation and the direction of national standard strategy. Conclusion: Based on the results, this study summarized the policy decision factors necessary for establishing the national standard policy and suggested the management plan in the midpoint of view.

• 대한의용생체공학회:의공학회지
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• 제24권5호
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• pp.435-442
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• 2003

In this paper, biomechanical aspects of dynamic대학교postural responses against forward perturbations were experimentally determined simultaneous measurements of joint angles, accelerations. EMG activations, center of pressure(CoP) movements and ground reaction forces(GRF), Thirteen young healthy volunteers, stood on a flat platform, were translated into the forward direction by an AC servo-motor at two separate velocities(0.1m and 0.2m/s). In order to recover postural balance against the forward perturbation, joint motions were observed in the sequence of the ankle dorsiflexion, the knee flexion and then the hip flexion during the later acceleration phase. Both acceleration patterns at the heel and the sacrum were shown the forward acceleration pattern during the later acceleration phase and early of constant velocity phase as increasing platform velocity, respectively. Tibialis anterior(TA) for the ankle dorsiflexion and biceps femoris(BF) for the knee flexion. the primary muscle to recover the forward perturbation, was activated during the half of acceleration phase. Ankle strategy was used for slow-velocity perturbation, but mixed strategy of both ankle and hip used for the fast-velocity perturbation. In addition, parameters of perturbation such as timing and magnitude influenced the postural response against the perturbation.

• Journal of Korea Trade
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• 제24권3호
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• pp.55-72
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• 2020

Purpose - In this paper, we provide recommendations for Korea's long-term direction and strategic measures to attract inward foreign direct investment (FDI) in response to Japan's export regulations. In doing so, we analyze the current situation and characteristics of trade between Korea and Japan, focusing on the parts and materials industry, which is particularly affected by Japan's trade regulations. Design/methodology - Based on the analysis of five successful inward FDI cases (e.g. Toray, IGK, Delkor, GlobalWafers, DuPont) and statistic trend review in the parts and materials industry, we consider various factors pertaining to successful inward FDI in Korea and propose valuable investment attraction strategies. Findings - For a successful investment attraction strategy, we studied some statistical trends in the internal and external environments of the parts and materials industry and successful investment attraction cases in Korea. We have found that in order to increase the probability of success in attracting investment, we need a mid-to long-term strategy considering multiple factors such as "Production-oriented, Demand-linked, Global Value Chain (VGC) linked, and Policy-linked investment attraction." Originality/value - We suggest several specific measures and important strategic implications for the Korean government and firm's managers to attract inward FDI successfully.