• Proceedings of the Korean Society of Dyers and Finishers Conference
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• 2009.03a
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• pp.179-180
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• 2009

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.10 no.8
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• pp.3474-3497
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• 2016

Network Function Virtualization (NFV) and Software Defined Networking (SDN) are recently considered as very promising drivers of the evolution of existing middlebox services, which play intrinsic and fundamental roles in today's networks. To address the virtual service deployment issues that caused by introducing NFV or SDN to networks, this paper proposes an optimal solution by combining quantum genetic algorithm with cooperative game theory. Specifically, we first state the concrete content of the service deployment problem and describe the system framework based on the architecture of SDN. Second, for the service location placement sub-problem, an integer linear programming model is built, which aims at minimizing the network transport delay by selecting suitable service locations, and then a heuristic solution is designed based on the improved quantum genetic algorithm. Third, for the service amount placement sub-problem, we apply the rigorous cooperative game-theoretic approach to build the mathematical model, and implement a distributed algorithm corresponding to Nash bargaining solution. Finally, experimental results show that our proposed method can calculate automatically the optimized placement locations, which reduces 30% of the average traffic delay compared to that of the random placement scheme. Meanwhile, the service amount placement approach can achieve the performance that the average metric values of satisfaction degree and fairness index reach above 90%. And evaluation results demonstrate that our proposed mechanism has a comprehensive advantage for network application.

• 전자공학회논문지 IE
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• v.47 no.4
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• pp.48-52
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• 2010

Recently, WiBro service as a mobile internet has been being extended. The market of wireless data communication has been being extended rapidly due to the increase of mobile data communication service supply such as smart-phone, WiBro service and so on. As the result, security is also emphasized in the mobile Internet In this paper, we propose the methods that tighten up security in the upcoming Enterprise Mobile-VPN service on WiBro network.

• Proceedings of the Korean Society of Computer Information Conference
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• 2014.07a
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• pp.397-398
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• 2014

연구기획 단계부터 사업화에 대한 고려를 위해서 기존의 연구 성과에 대한 조사 분석을 포함하는 해당 연구 주제에 대하여 기술동향, 시장분석, 정책 등 다양한 정보를 종합적이고 전략적으로 활용할 수 있는 정보 서비스 환경에 대한 필요가 급증하고 있으며, 국가연구 생산성 제고를 위해 후속심화 연구를 위한 연구 성과의 효율적인 공유 및 재사용을 지원하는 표준화 기반의 정보공유인프라 구축 및 운영이 필요하다. 이를 위해 국가R&D정보와 NDSL 정보를 연계하고, 이를 활용하여 연구자의 R&D활동관련 문제해결을 지원하는 서비스 체계를 구축할 필요가 있다. 이를 위해, NDSL-NTIS 연계 및 융 복합 서비스를 개발하고 이를 뒷받침하기 위해 연계체계 구축, 분석기반 개선, 개념기반 체계 구축, 연계활용을 지원하는 메타데이터 관리기능 개선을 수행하는 것을 목표로 국가R&D정보 네비게이션 서비스를 개발하였다.

• Proceedings of the Korea Technology Innovation Society Conference
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• 1998.05a
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• pp.4-4
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• 1998

As our society leads into information age, it becomes necessary to build a new national science & technology information system responded to new social technological change. Therefore, It is needed a picture of the new economic structure to introduce a new system, but our part of science & technology information service have not taken into account of it. This paper gives the national R&D electronic information service system of science & technology in this new change a guide to the coming structure, thus allowing it to better define and position its offerings in the context of one another. The premise of this paper is that new role of it will be based on the structure of new national science & technology information system In this research results, information society of the future is going to the direction of maximizing the economies of extent and connection. The intent of Science & Technology Integrated Information System is hold the information in common, to possess accumulation benefit of the information. In this system, science & technology information fulfill its function of a R&D part in national management system, therefore cooperation among enterprise, school and research institution is easily made through the process into more enhancing the total competition of national science & technology.

• Nuclear Engineering and Technology
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• v.42 no.5
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• pp.474-499
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• 2010

This paper presents the mostortant developments implemented in the APOLLO2 spectral code since its last general presentation at the 1999 M&C conference in Madrid. APOLLO2 has been provided with new capabilities in the domain of cross section self-shielding, including mixture effects and transfer matrix self-shielding, new or improved flux solvers (CPM for RZ geometry, heterogeneous cells for short MOC and the linear-surface scheme for long MOC), improved acceleration techniques ($DP_1$), that are also applied to thermal and external iterations, and a number of sophisticated modules and tools to help user calculations. The method of characteristics, which took over the collision probability method as the main flux solver of the code, allows for whole core two-dimensional heterogeneous calculations. A flux reconstruction technique leads to fast albeit accurate solutions used for industrial applications. The APOLLO2 code has been integrated (APOLLO2-A) within the $ARCADIA^{(R)}$ reactor code system of AREVA as cross section generator for PWR and BWR fuel assemblies. APOLLO2 is also extensively used by Electricite de France within its reactor calculation chain. A number of numerical examples are presented to illustrate APOLLO2 accuracy by comparison to Monte Carlo reference calculations. Results of the validation program are compared to the measured values on power plants and critical experiments.

• ETRI Journal
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• v.36 no.2
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• pp.271-279
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• 2014

This paper proposes a new broadcasting system for the service-compatible 3DTV in which the 3D service can coexist with the conventional digital TV broadcast. In the proposed system, the commercial 3DTV service can be implemented via the existing DTV channel without utilizing the dedicated 3DTV system. This 2D/3D system interworks with the conventional system and can switch to 2D or 3D service according to the broadcast programming and schedule. The system also provides a mechanism that can prevent the synchronization mismatch between left and right video streams and between the stream and the associated signaling in the 2D/3D transition periods. The picture quality measurements are carried out based on the ITU-R recommended test to check the level of quality of service provided by the proposed scheme. The conformity tests are also performed with the conventional channel and the receiver for the DTV system to confirm the feasibility of the proposed one for the commercial service.

• Journal of Korean Society for Quality Management
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• v.45 no.4
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• pp.811-828
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• 2017

Purpose: In the meantime, studies on the measurement methods of service quality have mainly been conducted in views of the service recipients. In this study, we introduce a co-orientation model that compares the perceptions of service provider and recipient and examine the applicability in service quality field. Methods: In this study, we conducted a case study on the specific service called 'National R&D Project Plan Evaluation Service' to examine the applicability of the co-orientation model in the service quality field. Results: We could identify the phenomenon of how service providers and recipients perceive differently about specific services introduced in the case study. This study confirms that it can be used to identify problems in mutually oriented service quality activities and to take practical measures to improve them. As we have seen in this case study, the co-orientation model is expected to be of great help in exploring opportunities for quality improvement in the area of service quality. Conclusion: The service quality co-orientation model allows the service provider to distinguish between what they think of differently with the service recipient and what they have in common, so the service provider will be able to find the agenda of service quality improvement.

• Journal of Korea Technology Innovation Society
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• v.12 no.2
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• pp.388-412
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• 2009

This study analyzed the important factors in service quality for public usage of national R&D facilities and equipments, and, using those factors, performed the importance-performance analysis for several national R&D programs in order to examine what service quality factors should be concentrically improved in each programs. Additionally, the in-depth interview with program managers and R&D facility experts was performed to realize the managerial issues subject to the characteristics of programs regarding the national R&D public facility management. As the results, this study made some political suggestions such as the reformation of promoter's role regarding the formulation of the government policy to support those programs. For example, it is more suitable for colleges as the subject of programs to be invested for self-research purpose rather than public usage, for independent corporation to be centered on the more general and common production fields, and for the government R&D agencies on the leading and special technical fields.

• The Journal of the Korea Contents Association
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• v.14 no.7
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• pp.480-494
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• 2014

The importance of knowledge and information is ever increasing. The ingredients of the customer value of the information offered for free by the public information organizations are different from those of the ordinary products or services. This study aims to identify the factors which affect the information customer value and the job performance of the R&D managers who use national R&D information service(NTIS). The results show the quality of information service and the perception of services organizations have significant positive effect on customer value. In addition, the customer value have significant influence on the job performance. Meanwhile, the perception of information organizations have not effect on the job performance. Regarding the moderating effect of the information using environment, the results are as follows: the information using environment moderates the relationship between the information service quality and between the customer value and the perception of information organizations, and the relationship between the customer value and the job performance, but does not moderate the relationship between the perception of information services organizations and the job performance. According to the research results, we proposed several implications to foster the customer value management in the field of public information as well as future research directions.