• Journal of Advanced Marine Engineering and Technology
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• 제34권4호
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• pp.532-539
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• 2010

유무선 통신기술이 접목된 정보통신 및 제어기술을 이용하는 첨단해양교통시설은 안전한 해양교통 환경을 보장할 수 있는 혁신적인 교통시설이다. 표준화를 기반으로 개발되어진 기술을 통합한 해양교통시설은 항로표지 시스템의 관리와 모니터링 분야에 그 응용기반이 확대되어져 가고 있다. 이러한 해양교통 환경적 변화를 고려하여 해양교통시설에 대한 현황을 파악하고, 해양교통시설 관리시스템 통합의 타당성을 확인하였고, 통합을 구현하기 위한 최적의 방안 및 기존 시스템과의 연계를 통한통합 방안을 제시하였다.

• 융합보안논문지
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• 제6권2호
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• pp.31-42
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• 2006

이 논문에서는 기존 정보보안체계의 취약성에 대처하고 보다 강력한 침입차단을 위해 통합화 된 인프라스트럭처 구조를 제안했다. 제안된 인프라스트럭처는 정보보안 프레임워크, 기능메커니즘, 통합화구조에 기반한 정보보호스킴으로 구성되었다. 이 논문은 오늘날의 바이러스방역환경에서 악성트래픽을 효과적으로 차단하기 위해서는 인프라스트럭쳐를 기본으로 구조개선과 스캐닝툴의 효과적인 결합을 통한 대응이 최적의 접근방법임을 제시하고 있다. 본 논문을 통해 인프라스트럭처상에서의 성능분석모델을 제시했으며 이 분석모델을 통해 1단계, 3단계, 5단계 차단단계별 성능측정이 가능함을 실험을 통해 보여줬다. 최적의 정보보호를 위한 효율적인 인프라스트럭처 구조는 사용자 또는 사용자조직에 의해 계속적인 진단과 평가 및 튜닝이 필요함을 본 연구에서는 결론으로 강조했다.

• 한국정보통신학회논문지
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• 제19권10호
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• pp.2429-2440
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• 2015

본 논문에서는 국내 연구ㆍ교육기관들의 협업 생태계 구축 및 협업 활성화를 위한 통합협업 인프라를 소개한다. 통합협업 인프라는 국내 연구ㆍ교육기관, 관련 상용 서비스 업체들이 참여하고 이들의 협력 증진을 위한 다양한 협업 지원 시스템과 서비스를 포함한다. 특히 제안한 통합협업 인프라는 ID 페더레이션 기술을 기반으로, 협업 참여 기관들의 연구자원 공유를 위한 사용자 인증 프레임워크를 제시함으로써 협업의 효율성을 제고한다. 본 논문은 국가과학기술연구망에 구축한 통합협업 인프라에 대해 기술하고 제안된 프레임워크의 동작 방식을 검증한다.

• KIEAE Journal
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• 제9권5호
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• pp.29-37
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• 2009

As with the January 2005 amendment of the Act on Private Participation in Infrastructure, schools are now included in the scope of privately-funded infrastructure projects. According to the announcement made by the Ministry of Education, Science and Technology in 2007, a total of 1.1 billion-won stimulus package has been proposed and is being implemented to operate private investments in social infrastructure helping to secure sufficient educational facilities for a period of five years from 2005 to 2010. Private participation offers first-priority infrastructure in a timely manner, raises efficiency with creative project conception and design, and stimulates economy by tapping into unemployed fund. This study limited its scope to new school construction projects in Gyeonggi Province which have been implemented via BTL system since January 2005. And using field-inspection and interview techniques, the study proposed improvement schemes applicable to the field. The results will be fully incorporated into new school construction projects to be carried out in the future, to help build creative learning space-student-oriented quality structures-where in Korea's leaders of the 21st century knowledge-based society will be educated.

• 정보보호학회논문지
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• 제20권5호
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• pp.111-124
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• 2010

원격 검침 시스템(AMI : Advanced Metering Infrastructure)은 최근 활발히 추진 중인 스마트그리드의 핵심 인프라로, 구축비용 절감 및 운영의 효율성을 위해 무선 통신 기술 도입이 적극적으로 검토되고 있다. 하지만, AMI에 무선 통신 기술 적용 시 무선 통신의 보안 취약점 때문에 다양한 보안 위협이 발생 가능하기 때문에 이에 대한 대응책이 필요하다. 본 논문에서는 Binary CDMA 망을 이용한 AMI 네트워크 무선망 구조를 제시하고, 이에 대한 보안 대책으로 BSIM(Binary Subscriber Identity Module)을 중심으로 사용자 인증 및 무선 구간 암호화를 수행함으로써 AMI 무선 구간의 보안 위협을 감소시키는 방안에 대해 연구한다.

• 한국환경과학회지
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• 제30권11호
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• pp.937-944
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• 2021

In this study, water resource topics, infrastructure, water supply, users, and economic indicators based on statistical annual standards for evaluating water welfare were selected by examining domestic and foreign water resource-related indicators. The level of water welfare was evaluated relative to 23 cities and counties in Daegu and Gyeongsangbuk-do using data from the Statistical yearbook, and places with high value of indicators urbanization and large populations were excellent in the infrastructure field, but overall analysis showed that small and medium-sized cities had higher levels. It is judged that it is necessary to develop continuous research and indicators that can evaluate and quantify the level of physical welfare that the people can feel by utilizing the results of this study. In future studies, it is necessary to systematically evaluate the level of water welfare by local governments in Korea through more diverse evaluation items and detailed indicators for each item so that it can be used as basic data for realizing water welfare.

• Journal of the Korean Wood Science and Technology
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• 제49권3호
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• pp.254-266
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• 2021

Using forest resources involves solving complex and diverse tasks. At the same time, one of the key goals in the field is improving the quality of forest infrastructure. This direction requires adequate mathematical and economic justification. Moreover, creating an effective infrastructure will not only increase the accessibility and usage volumes of wood and other forest resources, but also contribute to the development of continuous and sustainable forest management. The existing practice of making decisions in terms of the organizational and technological aspects of logging, based on the personal experiences of managers or leading specialists in enterprises, hinders the achievement of constant optimal efficiency. The paper presents results that are a continuation of the research cycle of the authors' team in the fields of optimization and algorithmization of various logging processes. The focus of the study lies in the processing and movement of wood resources, the most valuable products of the investigated groups of enterprises. To this end, the paper presents a developed algorithm for determining an effective technological chain of transportation in logging operations, and for improving loading and unloading processing operations under dynamic natural and production conditions. This algorithm serves as the methodological basis for designing logging infrastructure in a dynamically changing environment.

• The Journal of Asian Finance, Economics and Business
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• 제10권2호
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• pp.183-193
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• 2023

This paper proposes and examines the economic impact of infrastructure improvement on the San-En-Nanshin region in the Chubu area of Japan. We develop a single transportation computable general equilibrium (CGE) model for each subregion within the San-En-Nanshin region. The explicit modeling of the transportation infrastructure is defined based on interregional commuting flows and business trips, considering the spatial structure of the San-En-Nanshin economy. A CGE model is integrated with an interregional transportation network model to enhance the framework's potential for understanding the infrastructure's role in regional development. To evaluate the economic impact of transportation improvement, we analyze the interrelationship between travel time savings and regional output and income. The economic impact analysis under the CGE framework reveals how transportation facilities and systems affect firm and household behavior and therefore induce changes in the production and consumption of commodities and transportation services. The proposed theoretical model was tested by using data from the 2005 IO tables of each subregion and the 2006 transport flow dataset issued by the Ministry of Land, Infrastructure, Transport, and Tourism in Japan. As a result, the paper confirms the positive effect of transportation investment on the total output and income of the studied region. Specifically, we found that while economic benefits typically appear in urban areas, rural areas can still potentially benefit from transportation improvement projects.

• 국제학술발표논문집
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• The 2th International Conference on Construction Engineering and Project Management
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• pp.509-519
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• 2007

Private financing is playing an increasing role in public infrastructure construction projects worldwide. However, private investors/operators are exposed to the financial risk of low profitability due to the inaccurate estimation of facility demand, operation income, maintenance costs, etc. From the operator's perspective, a sound and thorough financial feasibility study is required to establish the appropriate capital structure of a project. Operators tend to reduce the equity amount to minimize the level of risk exposure, while creditors persist to raise it, in an attempt to secure a sufficient level of financial involvement from the operators. Therefore, it is important for creditors and operators to reach an agreement for a balanced capital structure that synthetically considers both profitability and repayment capacity. This paper presents an optimal capital structure model for successful private infrastructure investment. This model finds the optimized point where the profitability is balanced with the repayment capacity, with the use of the concept of utility function and multi-objective GA (Generic Algorithm)-based optimization. A case study is presented to show the validity of the model and its verification. The research conclusions provide a proper capital structure for privately-financed infrastructure projects through a proposed multi-objective model.

• 한국항공운항학회지
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• 제32권1호
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• pp.71-78
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• 2024

In this study, we reviewed access transportation, operating companies, and airport infrastructure to revitalize Cheongju International Airport. Regarding access transportation infrastructure, it is necessary to promote a railway network connecting the metropolitan inland line and the central inland region. In addition, active administrative support from local governments is required to ensure smooth progress in railway and highway infrastructure linkage projects, such as the Osong Connecting Line and Chungbuk Line, high-speed rail network promotion, and expansion of the Chungbuk Eastern Axis Expressway and Central Expressway. Regarding operator access infrastructure, continuous efforts are required to add and attract airlines based at Cheongju International Airport. Regarding airport infrastructure, the Cheongju International Airport runway needs complete resurfacing due to its deterioration. Domestic passenger capacity has exceeded 6.5%, and considering the increase in import and export of high value-added goods in the North Chungcheong region, it is necessary to build and expand passenger terminals and cargo terminals. Cheongju International Airport's runway does not have enough runway length to operate large and ultra-large aircraft, so if it is extended from the existing 2,744m to 456m to 3,200m, several benefits can be expected in terms of revitalizing Cheongju Airport, such as route expansion.