• ETRI Journal
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• 제42권3호
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• pp.366-375
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• 2020

The network traffic prediction of a smart substation is key in strengthening its system security protection. To improve the performance of its traffic prediction, in this paper, we propose an improved gravitational search algorithm (IGSA), then introduce the IGSA into a wavelet neural network (WNN), iteratively optimize the initial connection weighting, scalability factor, and shift factor, and establish a smart substation network traffic prediction model based on the IGSA-WNN. A comparative analysis of the experimental results shows that the performance of the IGSA-WNN-based prediction model further improves the convergence velocity and prediction accuracy, and that the proposed model solves the deficiency issues of the original WNN, such as slow convergence velocity and ease of falling into a locally optimal solution; thus, it is a better smart substation network traffic prediction model.

• 국제지역연구
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• 제16권3호
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• pp.209-237
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• 2012

국제경영분야에서 가장 큰 중심화두가 되는 다국적기업의 성공과 실패에 있어서 해외자회사의 지식창출과 이전에 관한 문제는 다국적기업의 성공과 실패에 영향을 주는 가장 중요한 결정요인이다. 이로 인해 다국적 기업의 경우 글로벌 네트워크에 속해 있는 해외자회사들의 차별적 역할과 역량에 따라 글로벌 경쟁역량이 좌우되기 때문에 새로운 지식을 창출하고 이를 기업 내에 확산하는데 있어서 해외자회사의 전략적 역할을 인식하지 못하거나, 초우량센터를 발굴하고 육성하지 못하는 기업은 글로벌 경쟁에서 성공할 수 없을 것이다. 이러한 관점에서 본 연구는 다음과 같은 두 가지 연구목적을 달성하고자 한다. 첫째는 해외자회사를 지식창출의 중심점으로 발전시키는데 있어서, 지식창출역량에 영향을 주는 핵심요인을 도출하는 것이고, 둘째는, 이들 핵심요인을 강화하는 전략과 성공요건을 제시하는 것이다. 기존 연구에 비해 본 연구는 해외자회사의 역할을 지식창출의 관점에서 본사와 다른 네트워크 주체와의 관계, 현지국의 환경, 자회사의 조직구조와 역량이라는 관점에서 해외자회사가 탁월성의 거점이 될 수 있는 전략적 관점을 통해 실무적 시사점을 제시할 수 있을 것으로 기대된다.

• 융합보안논문지
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• 제17권5호
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• pp.133-142
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• 2017

군보안상 해킹에 대응하기 위하여 군조직문화의 특성과, 군조직내 물리보안의 개념, 정보통신상의 해킹 개념을 이해하고, 군보안상 해킹사례를 분석하여, 문제점을 도출하고 대응방안을 통해 군의 물리보안활동을 강화해야 한다. 군내부망에 대한 맹신에서 벗어나 H/W적인 보강방안, 군내 정보통신자산에 대한 통제방안, 국방망과 인터넷망과의 연동이 되는 접점에 대한 보안통제 강화방안, 법적인 보완장치, 군에 지원되는 외주용역업체 및 외부민간업체에 대한 인원 시설 보안측면에서의 보안관리방안 등이 요구된다. 군조직에서 해킹의 위험성과 실제 발생한 해킹사례의 분석을 통해 국방망에 대한 해킹보안을 위한 강화대책과 법규적 보완장치 및 외주용역직원 통제방안 등에 대한 정책수립이야말로 정보통신기술적인 H/W 안전장치와 연계하여 물리적인 접근차단방식 등의 적용보다도 오히려 군조직 특성에 효율적으로 기능할 수 있는 해킹 대응방안이라고 할 수 있다.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2000년도 추계 학술대회지
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• pp.46-78
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• 2000

This paper is to introduce recent collaborative activities in agricultural weather information services among institutions in Korea as well as key concepts for understanding agrometeorological services. KMA and RDA have agreed upon the establishment of the Joint Committee for Agrometeorolgy at national level to strengthen the national agrometeorological services in data collection, information production, research, and services to end-users of agrometeorological information in Korea. Several on-going joint projects in agrometeorology by RDA/KMA are introduced in brief. The projects being developed are : Strengthening of the Joint Committee of agrometeorology, Extension of observation network for agricultural weather, Production of the detailed agrometeorological information based on numerical weather forecasts, Development of seasonal and interannual weather forecasts for agricultural applications, Information network system for supporting agrometeorological research, and Improvement of agrometeorological information services at national and regional level. Strengthening of programs for the education and training of agrometeorologists will be impending responsibilities of the government. The government must consider establishment of organizations dedicated to and in charge of national agrometeorological services to end-users. RDA and KMA should play a major role to obtain this goal, based on a close cooperation with universities, scientific societies, and other relevant institutions. If this plan is successful, major infrastructures and services in agrometeorology shall be established in the next 5 years, and we can contribute to regional and global societies through sharing experiences and know-hows.

• Structural Engineering and Mechanics
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• 제25권1호
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• pp.39-52
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• 2007

This paper describes an experimental study on structural health monitoring of a 1:3-scaled one-story concrete frame subjected to seismic damage and retrofit. The structure is tested on a shaking table by exerting successively enhanced earthquake excitations until severe damage, and then retrofitted using fiber-reinforced polymers (FRP). The modal properties of the tested structure at trifling, moderate, severe damage and strengthening stages are measured by subjecting it to a small-amplitude white-noise excitation after each earthquake attack. Making use of the measured global modal frequencies and a validated finite element model of the tested structure, a neural network method is developed to quantitatively identify the stiffness reduction due to damage and the stiffness enhancement due to strengthening. The identification results are compared with 'true' damage severities that are defined and determined based on visual inspection and local impact testing. It is shown that by the use of FRP retrofit, the stiffness of the severely damaged structure can be recovered to the level as in the trifling damage stage.

• International Journal of Computer Science & Network Security
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• 제21권12spc호
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• pp.675-683
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• 2021

An article is devoted to developing the concept of inter-territorial collaboration in the context of strengthening its economic security. This concept is based on the study of international experience and successful OTG functioning in Ukraine. The idea includes directions, forms, tools, procedures, and financial sources for joint projects that strengthen territorial associations' economic security. The research consists of assessing the state of economic development of territorial communities and forms of their cooperation with other territorial communities. Analysis, synthesis, induction, and deduction are the main methods of scientific knowledge used to summarize statistical information, normative and legal support, and global experience of cooperation of territorial communities. The study results include the main areas of cooperation of territorial communities in Ukraine, including long-term collaboration. The study also contains successful examples of collaboration between different territorial communities, applying practical aspects and tools to form effective interaction. The main points of discussion concern various forms of interaction between territorial communities, which allow achieving the economic goal more quickly and effectively.

• 한국항만경제학회지
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• 제27권4호
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• pp.291-311
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• 2011

항만의 기능은 갈수록 다기능 복합화 되어가고 있으며 네트워크 중심지화 되어 가고 있다. 최근의 항만은 배후지 산업이 중요하고 글로벌 물류센터로서의 역할과 주요 산업의 부품 공급 기지로서 기능이 커지고 있고, 금융 중심지 역할도 커지고 있으며, 세계주요 은행의 집적화 기능, 24시간 활용성 있는 첨단 통신 네트워크가 뒷받침 되는 비즈니스를 가능하게하며 문화와 관광명소로서의 기능도 갖춰줘야 된다. 인천항은 이러한 여러 배후 산업 기반을 경쟁력 강화를 위한 전략으로 활용하고 산업의 지역혁신 체계구축과 수도권 지역의 각 산업의 지원과 발전을 위해서 인천항의 동아시아 및 수도권 물류 복합화, 네트워크화 중심지 전략이 필요하다. 서해안 벨트 및 동해안, 남해안 후발 항만의 도약은 인천항 입장에서는 분명히 위협 요인이며, 수도권 물류의 인천항 유도는 필요요인이고, 중국의 급속한 경제성장에 따른 물동량 증가는 인천 항의 기회 강화 요인이나 인천항은 항만경쟁의 특성상 현재의 인천항의 제반 어려운 여건을 극복하고 한시적인 기간 안에 추구 할 수밖에 없다.

• International Journal of Advanced Culture Technology
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• 제12권2호
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• pp.249-257
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• 2024

This study analyzes the current status and prospects of Iran's air defense network, focusing on the Russian-made S-300 system, and derives implications for the development of South Korea's air defense network. Iran's air defense network exhibits strengths such as long-range detection and interception capabilities, multi-target processing, high-altitude interception, and electronic warfare response. However, it also reveals weaknesses, including lack of mobility, difficulty in detecting low-altitude targets, obsolescence, training level of operating personnel, and vulnerability to electronic warfare. Real-world cases confirm these weaknesses, making the system susceptible to enemy evasion tactics, swarm drone attacks, and electronic warfare. Drawing from Iran's case, South Korea should establish a multi-layered defense system, strengthen low-altitude air defense and electronic warfare capabilities, foster the domestic defense industry for technological self-reliance, and enhance international cooperation. By addressing these aspects, South Korea can establish a robust air defense network and firmly protect its national security. Future research should aim to secure and analyze materials from the Iranian perspective for a more objective evaluation of Iran's air defense network and continuously track Iran's efforts to improve its air defense network and the trend of strengthening drone forces to predict changes in the Middle East security situation.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제14권7호
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• pp.2800-2814
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• 2020

5G network optimization problem is a challenging optimization problem in the practical engineering applications. In this paper, to tackle this issue, Pareto fronts-driven Multi-Objective Cuckoo Search (PMOCS) is proposed based on Cuckoo Search. Firstly, the original global search manner is upgraded to a new form, which is aimed to strengthening the convergence. Then, the original local search manner is modified to highlight the diversity. To test the overall performance of PMOCS, PMOCS is test on three test suits against several classical comparison methods. Experimental results demonstrate that PMOCS exhibits outstanding performance. Further experiments on the 5G network optimization problem indicates that PMOCS is promising compared with other methods.

• 대한약침학회지
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• 제24권3호
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• pp.138-141
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• 2021

Objectives: This study aims to describe the utilization of herbal formulas from Wenrejingwei by using network analysis and understand the treatment of acute exogenous febrile diseases. Methods: We constructed a matrix of high-frequency herbal combinations (HCs) from Wenrejingwei and Shang Han Lun and cluster networks based on cohesive analysis. Network analysis was performed to compare the results. Results: The results of the high-frequency HC network in Wenrejingwei showed cohesive patterns in three categories corresponding to dampness-heat and warm-fever treatment. Compared to the Shang Han Lun network, the Wenrejingwei network indicated a careful approach in the use of pungent and warm herbs such as Guizhitang. Moreover, the combination of Scutellaria baicalensis and Coptis chinensis along with the use of herbs strengthening yin, such as Ginseng Radix and Liriopes Radix, provide evidence of a holistic approach in the treatment of exogenous febrile diseases by considering the balance of the human body damaged by heat. Conclusion: The results of this study could help select appropriate herbal formulas and treatment methods for treating Onbyeong and modern acute febrile infectious diseases.