• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.22 no.6
• /
• pp.534-541
• /
• 2021

This study aims to establish an efficient future technology development strategy in the information and telecommunications industry by grasping related technology trends and fusion complexity through an analysis based on standard patents. Analyzing 1,983 patents related to the information and telecommunications industry identified the trends in major patent applicants and detailed technologies in the world. In addition, technology trends were investigated through keyword analysis to examine the degree of complexity in information and communications technology, confirming the direction of research in information technology. Electronic component and wireless communications fields have relatively few standard patents, but they are highly convergent with other industrial technologies. Computer information processes and communication and broadcasting technologies are highly related to each other, so they can be used as standard fusion technologies in standard patents. In addition, standardization activities in optical and image/sound devices are found to be high.

• The Journal of the Korea institute of electronic communication sciences
• /
• v.18 no.6
• /
• pp.1087-1094
• /
• 2023

Due to the development of technologies, such as big data, cloud, IoT, and AI, The high data throughput is required, and the importance of network flexibility and scalability is increasing. However, existing network systems are dependent on vendors and equipment, and thus have limitations in meeting the foregoing needs. Accordingly, SDN technology that can configure a software-centered flexible network is attracting attention. In particular, a load balancing method based on SDN can efficiently process massive traffic and optimize network performance. In the existing load balancing studies in SDN environment have limitation in that unnecessary traffic occurs between servers and controllers or performing load balancing only after the server reaches an overload state. In order to solve this problem, this paper proposes a method that minimizes unnecessary traffic and appropriate load balancing can be performed before the server becomes overloaded through a method of assigning weights to servers in stages according to server load.

• The Journal of the Korea institute of electronic communication sciences
• /
• v.7 no.5
• /
• pp.991-998
• /
• 2012

This study considered NCW in the general as a key component of Future War and analyzed the international technical trend of tactical data link as the key of technical elements. The technique applied to Future War results from development of electronic communication and IT technique. However, NCW which plays a significant role in the Future War is not possible due to a development of simple technique but requires the amalgamative approach of various techniques essentially. That is, it should be understood and approached the management scenario and various techniques comprehensively. NCW is one of the areas which future electronic communication and IT can concentrate, so the government has been working for the developmental introduction of NCW strategically until 2020. Already, the level of localization of components related to electronics in military supplies exceeds 85%, but under the amalgamative research of technology in the high level like this, it would be possible to create new opportunities. Thus, the electronic communication and IT technology should seek effective applications of NCW by comprehending each area complexly.

• Information and Communications Magazine
• /
• v.28 no.4
• /
• pp.41-50
• /
• 2011

미래 전에서는 정보의 중요성이 더욱 부각되고 있으며 정보의 수집 및 전파, 정확한 지휘결심 및 전파, 기동타격체계의 통제 등으로 이어지는 지휘통제의 전 과정을 유기적으로 연결하여, 그 성능을 극대화시키는 것이 네트워크 중심전(NCW: Net-Centric Warfare)의 개념이다. NCW 실현을 위해 개발중인 여러 체계 중 주목 받고 있는 것이 무인기(UAV: Unmanned Aerial Vehicle) 이다. 무인기는 감시정찰, 고정밀 타격, 그리고 전투피해평가 기능 등을 수행하며, 전술적인 상황인식이 가능하게 한다. 무인기가 이러한 임무를 수행하기 위해서는 비행체의 상태정보, 비행체의 조종통제정보, 그리고 임무 탑재체가 획득한 정보의 간단없고 정확한 전달이 요구된다. 이러한 정보를 전송하기 위한 비행체와 지상체간의 제반 통신을 데이터 링크(Data Link)라 하며, NCW 구현에 있어서 가장 핵심이 되는 요소이다. 세계 각국은 영상정보 수집자산으로서 무인기와 데이터링크의 개발에 박차를 가하고 있는 실정이며, 우리 군도 전력화가 계획된 각 제대별 무인기의 통합운용을 위한 영상정보 공용데이터 링크 (MPI-CDL: Multi-Platform Image and Intelligence Commom Data Link)를 개발중에 있으며 지속적인 영상정보 수집자산의 소요증가에 따른 주파수 획득문제와 사업별 독자적인 데이터 링크의 개발을 지양하고 기존체계와의 상호운용 및 단절없는 통신을 보장을 위해 개발과 동시에 국가적 차원에서의 기술구조 표준화가 추진되어야 한다. 이러한 시점에서 본고에서는 먼저 선진국의 (CDL : Commom Data Link) 표준화 동향을 알아보고, 상호운용성과 연동을 위한 한국형 MPI-CDL 기술 표준화방향을 제시하고자 한다.

• Journal of Korea Port Economic Association
• /
• v.30 no.1
• /
• pp.73-96
• /
• 2014

Competitiveness of container ports has been traditionally evaluated by capability of individual ports to provide services to customers or their service quality. However, since container ports are connected by container shipping networks to varying degrees, the status of the ports in liner shipping service networks also determines competitiveness of the ports. Sometimes same ports may play different roles in different forms of shipping networks. Shipping network connections that formulate in container ports therefore have more significant impact on their performance than service capabilities they have. This study aims to explore how the shipping and port network has been structured and changed in the past and to examine the network characteristics of ports using Social Network Analysis(SNA). In this SNA study, nodes in the network are the ports-of-call of the liner shipping services and links in the network are connections realized by vessel movements, such that the liner shipping networks determine the port networks. This study, therefore, investigates the liner shipping networks and through its results demonstrates the network characteristics of the ports that are represented by the four centrality indices. This provides port authorities and terminal operating companies with managerial implications to enhance competitiveness from customers' perspectives.

• Journal of Advanced Navigation Technology
• /
• v.14 no.5
• /
• pp.604-609
• /
• 2010

The tactical datalink system has been recognized as the key element in Network Centric Warfaret(NCW). The military has been putting great efforts into establishing datalink system using existing tactical radio and UMPC. but the aircraft operational environment and the requirement specification for equipments mounted in the avionics are differentiated with those in other platforms, so special efforts are needed to select suitable UMPC. In this paper, we consider the requirement analysis for UMPC in respect of processor performance, operation system (OS) and NVG compatibility. Additionally we have to make a effort to understand the operational environment of aircraft and examine th standard to select the appropriate UMPC, and then we expect to establish the tactical datalink system successfully.

• Proceedings of the Korea Water Resources Association Conference
• /
• 2011.05a
• /
• pp.57-57
• /
• 2011

탄소발자국(carbon footprint)은 인간의 생산 및 소비활동 전 과정에서 발생하는 온실가스의 양을 나타내는 지표 중 하나로, 최근 기후변화 대응 전략의 일환으로 국제사회의 주목을 받고 있는 개념이다. 현재 영국, 일본, 스위스, 프랑스, 미국 등 선진국을 중심으로 탄소발자국 산정을 통해 온실가스 배출을 저감하려는 시도가 활발히 진행되고 있으며, 탄소발자국 개념을 물관리 분야로까지 확대 적용하는 방안이 논의되고 있다. 본 연구의 목적은 영국과 미국의 서로 다른 형태의 물분야 탄소발자국 산정 방안을 비교 분석함으로써 우리나라의 효율적인 기후변화 대응 물관리 계획에 적용하는 방향을 제시하는 데 있다. 영국은 2008년 제정된 기후변화법에 따라 탄소 저감 목표를 수립하고 정부 차원에서 마련한 표준화된 탄소 산정 가이드라인을 바탕으로 지역 물회사들로 하여금 탄소발자국 산정 및 온실가스 저감계획을 이행하도록 하고 있다. 반면 미국의 경우, 정부 차원에서 탄소라벨링 시스템이 제도화되어 있지는 않으나, 하천네트워크(River Network)와 같은 비영리 민간단체를 통해 물 분야의 탄소 저감 인벤토리가 구축되어 왔다. 현재 우리나라 수자원 분야에서 한국수자원공사가 일부 지역 정수장의 수돗물 및 병물의 생산 및 공급 전 과정에서 발생하는 탄소를 정량화하고 있으나, 물관리 시스템 전반의 온실가스 인벤토리 구축을 통한 표준화된 저감계획이 수립되지 않은 상태이다. 본 연구에서는 우선 영국과 미국에서 진행되어 온 물 분야 탄소발자국 논의의 배경과 동향 및 시행 체계를 살펴보고, 영국 정부 차원에서 제시한 물 분야 탄소 산정 가이드라인과 미국 민간부문에서 제시한 안을 각 항목별로 분석하였다. 이를 통해 두 나라가 비슷한 시기에 탄소발자국 논의를 시작하였음에도 불구하고 실제 적용 과정에서 나타나는 차이점과 특수성을 분석하였다. 탄소발자국 산정은 오늘날 수자원 분야의 기후변화 대응력을 강화하기 위한 대안으로 그 중요성이 점차 증대되고 있다. 영국과 미국의 사례에서 살펴보았듯이 효율적인 온실가스 감축을 위해서는 총괄적인 온실가스 감축 인벤토리 구축이 선행되어야 한다. 따라서 본 연구의 결과는 국내 물관리 분야에서 저감 잠재력이 큰 곳을 중심으로 한 온실가스 저감계획 및 방향 설정에 유의한 시사점을 제공할 것이다.

• The Journal of the Institute of Internet, Broadcasting and Communication
• /
• v.12 no.3
• /
• pp.89-97
• /
• 2012

In recent years, efficient energy management technologies are required, as environmental problems have emerged worldwide. In response to this, smart home services focused on efficient energy management technology seems to be emerging. And the integration of technology of user-oriented real-time energy monitoring and control systems is required. In this paper, we present a location-based green home service using smart phones for efficient energy management in a house. We design a green home network system to apply the green home service, and implement an integrated gateway system which connects and controls each appliance in a house. We develop appliance control services and indoor location services on smart phones, and determine whether user's occupancy of each room by measuring the location according to the variation of signal strength. In order to evaluate the performance of the energy savings, we have set up the scenarios of energy usage pattern and have compared the energy variation resulting from the application of the indoor location services with smart meters. A comparison of energy usage demonstrated that the energy saving of a house with the proposed location-based green home service was down up to 30%.

• Journal of Korea Port Economic Association
• /
• v.33 no.2
• /
• pp.1-18
• /
• 2017

By using social network analysis, this study examined 102 countries, 281 ports, and 6,318 maritime routes associated with the global network of the Maersk Line. With the 'Belt and Road' in place, China is developing ports, expanding the cooperation with major ports, and increasing its influence on maritime transport. China's ports' reform and development implies establishing stable and independent logistic networks for supply of raw materials as well as exports and imports. This is closely related not only to individual ports' competitiveness, but also to relational structures between maritime powerhouses such as the US-which has the largest share and influence in the global market-and the surrounding countries. In this regard, an analysis of the maritime transport needs to consider the characteristics of individual ports together with those of each country. This study identified the characteristics of each port in light of the relationships in the global network of Maersk and applied them to each country. Moreover, the individual networks of China, the US, and Korea are compared. The findings showed that China, the US, Panama, Malaysia, and Spain accounted for large shares of the global network, while the shares of China, Korea, Taiwan, and Vietnam were high in China's network. In addition, by comparing individual networks of China, the US, and Korea, it emerged that Korean ports such as Busan and Gwangyang had secured a high level of competitiveness in the Chinese network.

• Journal of Intelligence and Information Systems
• /
• v.27 no.1
• /
• pp.47-64
• /
• 2021

The global spread of COVID-19 around the world has not only affected many parts of our daily life but also has a huge impact on many areas, including the economy and society. As the number of confirmed cases and deaths increases, medical staff and the public are said to be experiencing psychological problems such as anxiety, depression, and stress. The collective tragedy that accompanies the epidemic raises fear and anxiety, which is known to cause enormous disruptions to the behavior and psychological well-being of many. Long-term negative emotions can reduce people's immunity and destroy their physical balance, so it is essential to understand the psychological state of COVID-19. This study suggests a method of monitoring medial news reflecting current days which requires striving not only for physical but also for psychological quarantine in the prolonged COVID-19 situation. Moreover, it is presented how an easier method of analyzing social media networks applies to those cases. The aim of this study is to assist health policymakers in fast and complex decision-making processes. News plays a major role in setting the policy agenda. Among various major media, news headlines are considered important in the field of communication science as a summary of the core content that the media wants to convey to the audiences who read it. News data used in this study was easily collected using "Bigkinds" that is created by integrating big data technology. With the collected news data, keywords were classified through text mining, and the relationship between words was visualized through semantic network analysis between keywords. Using the KrKwic program, a Korean semantic network analysis tool, text mining was performed and the frequency of words was calculated to easily identify keywords. The frequency of words appearing in keywords of articles related to COVID-19 emotions was checked and visualized in word cloud 'China', 'anxiety', 'situation', 'mind', 'social', and 'health' appeared high in relation to the emotions of COVID-19. In addition, UCINET, a specialized social network analysis program, was used to analyze connection centrality and cluster analysis, and a method of visualizing a graph using Net Draw was performed. As a result of analyzing the connection centrality between each data, it was found that the most central keywords in the keyword-centric network were 'psychology', 'COVID-19', 'blue', and 'anxiety'. The network of frequency of co-occurrence among the keywords appearing in the headlines of the news was visualized as a graph. The thickness of the line on the graph is proportional to the frequency of co-occurrence, and if the frequency of two words appearing at the same time is high, it is indicated by a thick line. It can be seen that the 'COVID-blue' pair is displayed in the boldest, and the 'COVID-emotion' and 'COVID-anxiety' pairs are displayed with a relatively thick line. 'Blue' related to COVID-19 is a word that means depression, and it was confirmed that COVID-19 and depression are keywords that should be of interest now. The research methodology used in this study has the convenience of being able to quickly measure social phenomena and changes while reducing costs. In this study, by analyzing news headlines, we were able to identify people's feelings and perceptions on issues related to COVID-19 depression, and identify the main agendas to be analyzed by deriving important keywords. By presenting and visualizing the subject and important keywords related to the COVID-19 emotion at a time, medical policy managers will be able to be provided a variety of perspectives when identifying and researching the regarding phenomenon. It is expected that it can help to use it as basic data for support, treatment and service development for psychological quarantine issues related to COVID-19.