• Journal of the Korea Academia-Industrial cooperation Society
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• v.16 no.1
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• pp.703-712
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• 2015

This paper proposes the UIGRP, which can tackle the problem of the network disconnection and packet transmission delay caused by turning vehicles frequently in an urban intersection. The UIGRP was designed as follows. First, it calculates the direction of vehicles using the moving direction of vehicles and the location of a destination. Second, it makes the RSU measure the density of an urban intersection. Third, the TGF Algorithm in the UIGRP decides the data transmission paths by setting as an intermediate node, not only the vehicle that is moving in the direction where a destination node is located, but also the node that has the highest density. The TGF algorithm using a moving direction and density minimizes or removes the occurrence of local maximum problems that the existing Greedy Forwarding algorithm has. Therefore, the simulation result shows that UIGRP decreases the occurrence of local maximum problems by 3 and 1 times, and the packet transmission time by 6.12 and 2.04(ms), and increases the success rate of packet transmission by 15 and 3%, compared to the existing GPSR and GPUR.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.1
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• pp.155-162
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• 2020

In this paper, we present a radiation compensation method and experiment method for two-dimensional direction finding by elevation and azimuth angles of broadband GPS signal, and then produce experimental results. Previous studies have performed direction finding by only using the azimuth angle of the detected signal. So, the compensation table utilizes compensation data by azimuth angles only. However, the presented method in this study has compensation data by azimuth and elevation angles for two-dimensional direction finding. Because of direction finding systems and applications are diversified, recently. So, we present a two-dimensional radiation compensation method. For evaluation of the presented compensation method, we calculate the ideal phase differences on the antenna for two-dimensional direction finding and simulate phase differences using a FEKO EM simulator. Subsequently, we analyze experimental data by radiation compensation experiments using the presented compensation method in an anechoic chamber.

• The Journal of Fisheries Business Administration
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• v.49 no.1
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• pp.1-15
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• 2018

The main purpose of this study is to explore a way of fisheries cooperation through the ODA demand survey in the fisheries sector on 8 ASEAN countries. In detail, we identified the status of detailed cooperation in the fisheries sector with ASEAN countries and identified new cooperation network construction projects in accordance with the changes in external cooperation environment, and presented strategies and policy directions for fisheries cooperation projects. For this purpose, we surveyed the questionnaires of 8 ASEAN countries using structured questionnaires for local fisheries experts. As a result of the questionnaire analysis, eight ASEAN countries were classified into three groups according to DAC beneficiary standards and suggested implications. Based on the results of the survey, the basic direction of the fisheries cooperation projects in each of the eight countries surveyed was set up, and the preferred projects for fisheries cooperation projects were proposed by dividing them into groups. In addition, the research results were used to systematically establish national promotion plans.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.46 no.spc
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• pp.39-53
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• 2023

Recently, the market competition has been fiercer due to the acceleration of technological change and the launch of intelligent products. In this situation, technology cooperation activities through networks rather than independent technological innovation activities of a single company or institution are recognized as a crucial strategy to gain competitiveness. Technology cooperation can take various forms depending on the target technology, and researchers have conducted performance analyses of technology cooperation types. However, there have not been data-based quantitative studies on the types and trends of technology cooperation for the target technology. In this paper, we explored the difference between the technology cooperation types by technology and time using the formal concept analysis method and co-patent information. In particular, the proposed methodology has been verified through the case study of electric vehicles, and it is intended to suggest the direction of technological cooperation according to specific technologies and cooperation targets in the future

• THE INTERNATIONAL COMMERCE & LAW REVIEW
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• v.17
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• pp.197-224
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• 2002

This paper aims to analyze the status and prospects of chinese e-commerce, review previous literature, and provide future direction for cooperation with far east asian area This study deals with the reform, the open and entering WTO of China economy to suddenly change domestic IT industry, legal regulation of Chinese e-commerce market and cooperation with far east asian area. Especially, Chinese e-commerce market is much developed in recently, but relative legal system is unsatisfactory. Therefore this paper research firstly the present conditions and characteristics of Chinese e-commerce market, secondly Chinese e-commerce policy and legal regulation tendency, thirdly the e-commerce activity between Korea and China, and cooperation with far east asian area.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.14 no.6
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• pp.2971-2978
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• 2013

Recently, with the world-wide issues about global warming and CO2 reduction, a number of distributed generations(DGs) such as photovoltaic(PV) and wind power(WP), are interconnected with the distribution systems. However, DGs can change the direction of the power flow from one-direction to bi-direction, and also change the direction and amount of fault current of existing distribution systems. Therefore, it may cause the critical problems on the power quality and protection coordination. This paper proposes an operation algorithm for bi-directional protection coordination using and apply it for the evaluation system for protection coordination. From the simulation results It is found that the proposed method is more effective and convenient than existing method.

• Journal of Fisheries and Marine Sciences Education
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• v.29 no.3
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• pp.899-908
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• 2017

The purpose of this study is to identify challenges related to social, economic and environmental change for fishing villages and suggest the developmental direction of fishing village to actively respond to new changes. This study mainly focuses on fishing village fraternities. Its current problems are summarized as follows: shortage of labor, population aging, entry barrier against newcomers, insufficient guidance and supervision functions, lack of funds of new projects and inadequate statistics and data. The fishing village community in the modern meaning of the term can be understood as an economic and flexible social-cultural community based on openness, cooperation instead of exclusiveness and closeness, which aligns fisheries with local industries. Thus, in order for the fishing village community to improve, the followings areas required. First, strengthening capacity of the fishing village community. Second, establishing the database system and the third, reorganizing the fishing village community into a sea village community.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.7 no.5
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• pp.847-851
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• 2006

This paper presents a technology of information fusion between radar and electronic intelligence system. Radar can get range and direction information of targets and electronic intelligence system can get direction and electromagnetic information of targets which can be fused and identified together. We designed an information fusion unit in which information data is able to be added and compared and designed a display unit in which a fused information is totally displayed.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.11 no.3
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• pp.965-970
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• 2010

In this paper, a iterative image restoration method is proposed to restore for noisy-blurred images. In conventional method, regularization is usually applied to all over the without considering the local characteristics of image. As a result, ringing artifacts appear in edge regions and the noise amplification is introduced in flat regions. To solvethis problem we proposed an adaptive regularization iterative restoration using directional regularization operator considering edges in four directions and the regularization operator with no direction for flat regions. We verified that the proposed methods showed better results in the suppression of the noise amplification in flat regions, and introduced less ringing artifacts in edge regions. As a result it showed visually better image and improved better ISNR further than the conventional methods.

• Proceedings of the Korean Nuclear Society Conference
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• 2004.10a
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• pp.1423-1424
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• 2004