• 환경영향평가
• /
• 제14권6호
• /
• pp.387-402
• /
• 2005

In this study, we tried to predict the change of future land-cover and relationships between land-cover change and geo-spatial information in the Gongju area by using fuzzy logic operation. Quantitative evaluation of prediction models was carried out using a prediction rate curve using. Based on the analysis of correlations between the geo-spatial information and land-cover change, the class with the highest correlation was extracted. Fuzzy operations were used to predict land-cover change and determine the land-cover prediction maps that were the most suitable. It was predicted that in urban areas, the urban expansion of old and new towns would occur centering on the Gem-river, and that urbanization of areas along the interchange and national roads would also expand. Among agricultural areas, areas adjacent to national roads connected to small tributaries of the Gem-river and neighboring areas would likely experience changes. Most of the forest areas are located in southeast and from this result we can guess why the wide chestnut-tree cultivation complex is located in these areas and the possibility of forest damage is very high. As a result of validation using the prediction rate curve, it was indicated that among fuzzy operators, the maximum fuzzy operator was the most suitable for analyzing land-cover change in urban and agricultural areas. Other fuzzy operators resulted in the similar prediction capabilities. However, in the prediction rate curve of integrated models for land-cover prediction in the forest areas, most fuzzy operators resulted in poorer prediction capabilities. Thus, it is necessary to apply new thematic maps or prediction models in connection with the effective prediction of changes in the forest areas.

• 디지털콘텐츠학회 논문지
• /
• 제11권3호
• /
• pp.331-339
• /
• 2010

네트워크 보안에서의 효율성은 침입차단 성능과 시스템 performance로 대표된다. 네트워크 보안의 성능 향상을 위해서는 네트워크 인프라스트럭쳐에서의 기능적인 효율성을 우선 확보해야 한다. 그동안 네트워크 보안 효율성 제고 달성에 관한 많은 방법론들이 연구되었다. 이 같은 연구의 목적은 인프라스트럭쳐에서의 효율성 메커니즘 구현을 통해 빠른 응답시간내에 보다 우수한 침입차단을 실현하는 것이다. 이를 위해서 네트워크 보안 도메인 효율성 구조를 설계하고 구조별 효율성 측정방법을 연구함으로써 인프라스트럭쳐상에서의 보안방법론 모델을 제안하였다. 본 연구에서 제안한 방법론을 통해 체계적인 도메인 설계와 측정방법을 실시할 경우 운용인프라스트럭쳐 시스템상에서 보안 효율성 확보가 가능함이 입증되었다.

• International Journal of Contents
• /
• 제13권2호
• /
• pp.29-34
• /
• 2017

Cloud computing is becoming an effective and efficient way of computing resources and computing service integration. Through centralized management of resources and services, cloud computing delivers hosted services over the internet, such that access to shared hardware, software, applications, information, and all resources is elastically provided to the consumer on-demand. The main enabling technology for cloud computing is virtualization. Virtualization software creates a temporarily simulated or extended version of computing and network resources. The objectives of virtualization are as follows: first, to fully utilize the shared resources by applying partitioning and time-sharing; second, to centralize resource management; third, to enhance cloud data center agility and provide the required scalability and elasticity for on-demand capabilities; fourth, to improve testing and running software diagnostics on different operating platforms; and fifth, to improve the portability of applications and workload migration capabilities. One of the key features of cloud computing is elasticity. It enables users to create and remove virtual computing resources dynamically according to the changing demand, but it is not easy to make a decision regarding the right amount of resources. Indeed, proper provisioning of the resources to applications is an important issue in IaaS cloud computing. Most web applications encounter large and fluctuating task requests. In predictable situations, the resources can be provisioned in advance through capacity planning techniques. But in case of unplanned and spike requests, it would be desirable to automatically scale the resources, called auto-scaling, which adjusts the resources allocated to applications based on its need at any given time. This would free the user from the burden of deciding how many resources are necessary each time. In this work, we propose an analytical and efficient VM-level scaling scheme by modeling each VM in a data center as an M/M/1 processor sharing queue. Our proposed VM-level scaling scheme is validated via a numerical experiment.

• 디지털콘텐츠학회 논문지
• /
• 제10권4호
• /
• pp.501-507
• /
• 2009

인트라넷 네트워크상 에서의 응답시간 단축은 정보제공 효율성을 확보하는 기본요소이다. 그동안 네트워크상에서 응답시간 단축을 실현하기위해 많은 방법론들이 연구되고 제안 되었다. 이같은 연구의 목적은 응답시간 단축 메커니즘 구현을 통해 단축된 빠른 응답시간 내에서 신속성을 생명으로 하는 정보시스템 본래의 목표실현이 가능하기 때문이다. 네트워크를 활용하는 정보시스템에서 최종적인 목표는 요구되는 시간내에 목적하는 성능을 확보하는 것이다. 이를 위해서 정보시스템 네트워크 응답시간 측정방법을 연구개발 하므로서 단축된 응답시간 보증방법 개발이 가능해진다. 본 논문에서는 latency 테스트 결과를 참조하는 인프라시스템에서 응답시간 측정 방법론을 제안한다. 본 연구에서 제안한 방법론을 통해 체계적인 측정환경을 설계하여 응답시간 측정이 가능함이 입증되었고 응답시간측정 메카니즘을 통해서 개선된 네트워킹 기능과 정보시스템 기능을 위한 효율성제고 방법론 개발이 가능함을 보여주고 있다.

• Strategy21
• /
• 통권44호
• /
• pp.103-141
• /
• 2018

As the South China Sea maritime dispute illustrates, when considering the place where maritime claims occur, states do not have many choices to respond to maritime claims in which disputed areas are located far away from the land and are surrounded by the sea. As Mearsheimer (2014) points out, the sea stops power projection. Therefore, in order to adopt coercive as well as peaceful settlement policies to deal with maritime claims, states need to overcome obstacles (the sea) to project power. It means that if states want to conduct a specific foreign policy action, such as negotiating maritime borderlines or arguing sovereignty on islands, they need a tool (naval power) to coerce or to persuade the opponent. However, there are lack of research that studies maritime claims from the perspective of naval power. This research project fills this gap based on naval power. How do relative levels of naval power and (dis) parities of naval power influence the occurrence of MIDs over maritime claims? Naval power is a constitutive element during maritime claims. If disputants over maritime claims have required naval power to project their capability, it means that they have the capability to apply various ways, such as aggressive options including MIDs, to accomplish their goals. So, I argue that when two claimants have enough naval power to project their capabilities, the likelihood of MIDs over maritime claims increases. Given that one or both states have a certain level of naval power, how does relative naval power between two claimants influence the management of maritime claims? Based on the power transition theory, I argue that when the disparities of relative naval power between claimants becomes distinctive, militarized conflicts surrounding maritime territory are less probable. Based on the ICOW project which codes maritime claims from 1900 to 2001, the empirical results of the Poisson models show if both claimants have projectable naval power, the occurrence of MIDs over maritime claims increases. In addition, the result shows that when disputants maintain similar relative naval powers, they are more likely to initiate MIDs over maritime claims. To put it differently, if naval capabilities' gap between two claimants becomes larger, the probability of the occurrence of MIDs decreases.

• 한국정보통신학회논문지
• /
• 제7권7호
• /
• pp.1575-1581
• /
• 2003

사회가 고도의 디지털 정보화 시대로 급속히 발전함에 따라 영상 및 음성 데이터의 획득, 전송, 저장을 위한 멀티 미디어 통신 서비스가 상용화 되어가고 있다. 그러나, 여전히 데이터를 디지털화하거나 전송하는 과정에서 여러 가지 원인에 의해 노이즈가 발생하고 있으며, 이러한 노이즈를 제거하기 위한 연구는 지금까지 계속되고 있다. 노이즈를 제거하기 위해 기존에 FFT와 STFT 등이 있었으나, 신호에 대한 시간정보를 알 수 없고 시간-주파수 국부성이 상충관계를 갖는다. 따라서, 이러한 한계를 극복하기 위해 신호처리 분야의 새로운 기법으로 제시된 웨이브렛 변환은 시간-주파수 국부성을 가지므로, 다양한 신호를 해석하는데 용이할 뿐만 아니라, 다중 해상도 해석이 가능하므로 최근 여러 분야에 응용되고 있다. 그리고, 두 개의 웨이브렛 기저가 힐버트 변환쌍을 형성하도록 설계될 때, 웨이브렛 쌍은 데이터 특징 검출에서 기존의 DWT보다 우수한 성능을 갖는다. 따라서, 본 연구에서는 절단된 계수 벡터에 의해 설계된 두 개의 dyadic 웨이브렛 기저와 적응-길이 메디안 필터를 사용하여 임펄스 노이즈를 제거하였다.

• 농촌계획
• /
• 제18권3호
• /
• pp.137-148
• /
• 2012

The purpose of this study is to evaluate the differences of recognition of the actual conditions, performances, problems and issues of the Direct Payment Program for Rural Landscape Conservation(DPPRLC) between interest groups who are residents, officials and experts. In the results of this study, there were differences in awareness of DPPRLC depending on interest groups and whether the program participation. It is determined to be caused the limitations of the program that the target district farmers recognised the program as a source of income and seldom act to manage the rural landscape except cultivating "landscape crops". Therefore, the efforts will be demanded to clarify and share the goals, contents of the project. The following measures are proposed in this study for the direction of improvement of DPPRLC: First, the various efforts are needed to overcome the differences on the interest group's recognition for goals, contents, performance of the Direct Payment Program for rural landscape conservation. Second, it is needed to conduct the program based on the rural landscape plan and participant's capabilities. Third, the various programs to attract voluntary participation from residents should be implemented. Forth, it demands the entrusted implementation to professional organizations to support resident's voluntary activities of surveying rural landscape resources, planning rural landscape conservation, execution of village landscape conservation, etc. Fifth, the various programs to strengthen participant's capabilities should be implemented.

• Journal of Korea Trade
• /
• 제27권3호
• /
• pp.87-102
• /
• 2023

Purpose - Although the importance and necessity of "sustainable supply chain management (SCM)" is emphasized, it is often not realized due to conflicting results, the long time required, and large-scale changes brought about by sustainability. This study used the innovation resistance model to confirm the influence of sustainable SCM innovation resistance factors and dynamic capabilities on adoption intentions. This approach made it possible to understand the factors that hinder adoption of sustainability practices and to identify the relationships among influencing factors. It should also help to establish effective policies or strategies. Design/methodology - Through a literature review, the characteristics of sustainable SCM were classified into relative advantage, compatibility, perceived risk, and complexity. The effects of these innovation characteristics on innovation resistance in sustainable SCM and the effects of innovation resistance on adoption intentions were confirmed. In addition, the effects of SCM capabilities on innovation resistance and adoption intentions were analyzed, and the mediating effect of innovation resistance was analyzed. Findings - Compatibility, perceived risk, and flexibility had significant effects on innovation resistance. In turn, innovation resistance had a significant effect on adoption intention, and flexibility had a significant effect on intention to adopt. A partial mediating effect of resistance to innovation was confirmed. Originality/value - Although many previous studies have acknowledged trade-offs with sustainability, most sustainable SCM studies dealt with the correlations among positive drivers of adoption, practices, and performance. This study confirmed the process of accepting sustainable SCM innovation in a single model and is expected to serve as a cornerstone for future sustainable SCM adoption studies. In addition, our findings should help establish effective policies or strategies to activate SSCM adoption by identifying the factors that hinder the adoption of sustainable SCM.

• Journal of Korea Trade
• /
• 제27권3호
• /
• pp.199-216
• /
• 2023

Purpose - This study aims to identify the internal capabilities that export companies need to possess in order to utilize FTAs and to propose ways to expand their export performance through them. To achieve this goal, the study analyzed the internal factors that affect FTA utilization from a resource-based perspective, such as Origin Management Competency, Information Acquisition Competency, contract Management Competency, and Commitment to Export, based on prior research on corporate capabilities in the field of management and FTA-related research. The study ultimately aims to confirm whether a company's FTA utilization contributes to its export performance through the management and response to its internal factors for FTA utilization. Design/methodology - To achieve the research objective, this study conducted a literature review related to FTA utilization and identified the internal factors of companies that affect FTA by classifying them into Origin Management Competency, Information Acquisition Competency, contract Management Competency, and Commitment to Export Based on this, a final research model was developed, hypotheses were set through a preliminary study survey, and conclusions were drawn by analyzing the data of 312 companies. Findings - The empirical analysis results indicate that Origin Management Competency and Contract Management Competency have a positive impact on FTA utilization, while Information Acquisition Competency and Commitment to Export do not have a statistically significant impact on FTA utilization. Based on these findings, this study suggests measures for efficient FTA utilization for companies that want to utilize FTAs. Additionally, FTA utilization has a positive impact on export performance. In other words, the extent to which companies utilize the signed agreements has a positive impact on their performance. Based on these results, this study identifies the characteristics of companies that want to utilize FTAs and proposes measures for future efficient FTA utilization. Originality/value - This study has confirmed that in order for companies to utilize FTAs, they must meet the requirements of the FTA. To this end, the study has concluded that it is important to manage and address internal factors such as Origin Management Competency, Information Acquisition Competency, contract Management Competency, and Commitment to Export to increase FTA utilization. Based on these results, it can be confirmed that it is essential for companies to have an understanding and management of the internal factors that satisfy the requirements of the FTA in order to utilize the FTA.

• 지식경영연구
• /
• 제23권4호
• /
• pp.1-19
• /
• 2022

언택트 문화가 확산되면서 취약계층의 디지털 정보의 접근성 문제인 디지털정보격차가 사회·문화 분야를 비롯한 다양한 분야에서 정보의 불평등을 초래할 수 있다. 이에 본 연구는 취약대층을 대상으로 디지털 정보격차수준을 파악하고 정보의 접근성, 인구사회학적특성, 신체 및 정신건강 특성이 정보수준에 미치는 영향을 분석하였다. 그 결과, 정보접근성이 높을수록 정보격차는 감소하고 디지털활용능력수준은 증가하는 것으로 나타나고 있어 정보기기의 접근성을 높이고 활용할 수 있는 역량을 갖출 수 있는 기회를 제공해야 할 것이다. 또한 연령이 높을수록, 남성보다는 여성이, 소득수준이 낮을수록 정보격차가 커지는 것으로 나타나고 있어 취약계층에 대한 세부적인 계층별 프로그램을 통해 디지털 역량을 높일 수 있는 방안이 필요하다. 마지막으로 정보격차와 디지털활용능력수준은 취약계층의 삶의 만족도와 일상생활의 만족도에 유의한 영향을 미치고 있어 디지털 포용정책으로 패러다임을 전환하여 정보 활용 역량을 높이기 위한 역량강화 교육프로그램 확대가 지속적으로 운영되어야 할 것이다.