• International Journal of Highway Engineering
• /
• v.9 no.4
• /
• pp.159-169
• /
• 2007

In this paper, a PMS(Pavement Management System) is presented for the public agency who wish to execute rational repair by referring to asset management information regarding road pavement. The aim of the paper is to provide the decision makers with the planning information regarding maintenance strategies for efficient road pavement management. We found that life cycle cost can be minimized and repair cost in each year fluctuates when repeating repair at the IRI management level. The validity of PMS application presented in this paper is investigated through case studies for conducted for 22 national highway road sections in Korea.

• Proceedings of the Korea Multimedia Society Conference
• /
• 2000.04a
• /
• pp.296-299
• /
• 2000

본 연구는 컴퓨터 비전 시스템을 위한 라이브러리를 설계 및 구현하고, 이를 적용하여 적정량의 정액 내에 분포되어 있는 정자의 수를 측정하는 불임진단보조용 시스템을 개발하였다. 본 시스템은 육안으로 검사하던 수작업을 자동화하여 의사의 주관적 진단에 신뢰도 , 높은 수치화된 정보를 제공할 수 있다. 또한 범용 주변 장비와 윈도우즈 환경을 사용함으로써 경제성, 확장성, 호환성을 가질 뿐만아니라 윈도우즈 사용자에게 친숙하고 편리한 인터페이스를 제공할 수 있다. 개발된 시스템의 성능을 병원에서 제공된 영상으로 테스트하였다.

• KSCE Journal of Civil and Environmental Engineering Research
• /
• v.26 no.6D
• /
• pp.951-960
• /
• 2006

Structural pavement analysis considering lateral loads of moving vehicle was carried out in order to simulate passing vehicle loads under various interface conditions. To verify of existing multi-layer elastic analysis of layer interface effect parameters, this study compared outputs by using ABAQUS, a three dimensional finite element program and KENLAYER, multi-layer elastic analysis as vertical load was applied to the surface of asphalt pavements. Pavement performance depending on interface conditions was quantitatively evaluated and fundamental study of layer interface effect parameters was performed in this study. As results of the study, if only vertical loads of moving vehicle is applied, subdivision of either fully bonded or fully unbonded is enough to indicate interface effect parameters. On the other hand, when lateral loads are applied with vertical loads, pavement behavior and performance are greatly changed with respect to layer interface conditions. The thinner thickness of the asphalt layer is and the smaller elastic moduli of the asphalt layer is, the more pavement behavior is influenced by interface conditions. In addition, regression analysis equation analytically computing tensile strain which was considered thicknesses and elastic moduli of the asphalt layer and layer interface effect parameters at the bottom of the asphalt layer was presented using database from numerical analyses on national pavement model sections.

• Proceedings of the Korea Multimedia Society Conference
• /
• 2001.06a
• /
• pp.342-346
• /
• 2001

인터넷 우편 시스템은 기존의 우편시스템을 인터넷이라는 공용 망을 이용해서 재구성함으로서 우체국 업무의 효율성은 물론, 사용자의 편이에도 상당한 도움이 될 것이다. 인터넷 우편 시스템은 크게 3가지로 Front Agent(웹 기반의 사용자 인터페이스), End Agent(우체국), Management Agent(관리부) 나뉘어 지는데 본 논문에서는 EndAgent를 중심으로 서술하였다.

• Proceedings of the Korean Information Science Society Conference
• /
• 2003.04d
• /
• pp.599-601
• /
• 2003

본 논문에서는 e-비즈니스 공용프레임워크 국제 표준인 ebXML 환경에서 레지트리에 등록되어 있는 XML로 표현한 비즈니스 프로세스들과 비즈니스 문서들을 재사용하여 e-비즈니스 시스템을 효과적으로 개발할 수 있는 방법에 관하여 기술함으로써 전세계 e-비즈니스 시스템과 상호 운영 가능한 비즈니스 시스템을 개발하는데 기여하고자 한다.

• Journal of Korea Society of Industrial Information Systems
• /
• v.23 no.4
• /
• pp.69-79
• /
• 2018

We performs the cost-benefit analysis, an economical analysis technique, to measure the effect of a shared public supercomputer. The costs of two given alternatives, to share the public supercomputer in a national center and to employ their own supercomputers in the organizations under the necessity, will be estimated and compared for decision making. In the case of sharing, we can simply predict the cost based on the results of the previous public supercomputer. The cost of individual introduction, however, is almost unpredictable since it has a remarkable variability due to the required system performances, locations, human factor, and so on. Accordingly, an objective and valid method to estimate the cost of individual cases will be proposed in this research. Finally, we analyze the economic effect of operating public supercomputer by comparing the sharing cost with that of the individual employs. The results of analysis confirms that the sharing public supercomputer will reduce the operational cost about 10.3 billion won annually compared with the individual introduction. Accordingly, it is expected that the sharing public supercomputer will bring a considerable economical effect.

• KSCE Journal of Civil and Environmental Engineering Research
• /
• v.26 no.1D
• /
• pp.89-94
• /
• 2006

Premature failures in pavements are frequently reported due to rapid increasement in traffic volume, heavy vehicles, and high temperature in the summer. Based on this concept in mind, Korea Highway Corporation established the Test Road Operation Center to estimate the pavement performance. To evaluate the pavement performance effectively using the field data, wandering is an important topic in pavement analysis. In this study, portable wandering system was developed and analyzed to investigate the pavement responses due to the dynamic truck passes, and analyzed the wandering to dynamic load test. The test results revealed that the advantages of laser devices were noticeable compare to the other measuring ones. To understand the behavioral characteristics of pavements using the wandering measurement devices, dynamic truck tests were conducted in the field. Test results showed that the effects of wandering on asphalt pavement were significant. The data analysis using this wandering effect is considered as an important tool in performance analysis of asphalt concrete pavement.

• The Journal of the Acoustical Society of Korea
• /
• v.22 no.7
• /
• pp.528-538
• /
• 2003

A SCCRS (Speech and Character Combined Recognition System) is developed for working on mobile devices such as PDA (Personal Digital Assistants). In SCCRS, the feature extraction is separately carried out for speech and for hand-written character, but the recognition is performed in a common engine. The recognition engine employs essentially CHMM (Continuous Hidden Markov Model), which consists of variable parameter topology in order to minimize the number of model parameters and to reduce recognition time. For generating contort independent variable parameter model, we propose the SSMS(Successive State and Mixture Splitting), which gives appropriate numbers of mixture and of states through splitting in mixture domain and in time domain. The recognition results show that the proposed SSMS method can reduce the total number of GOPDD (Gaussian Output Probability Density Distribution) up to 40.0% compared to the conventional method with fixed parameter model, at the same recognition performance in speech recognition system.

• Journal of the Korea institute for structural maintenance and inspection
• /
• v.11 no.6
• /
• pp.201-212
• /
• 2007

This study presents experimental results of Steel-PSC mixed structural system having front-rear plate connection between Steel and Prestressed Concrete. Two kinds of Steel-PSC mixed structural system of 5.4m length were tested to evaluate flexural behaviors under four point loading, and 4 kinds of specimens with and without prestressing force at R & L type connection were tested to observe the shear behavior. Based on the test results of load-deflection curves and failure modes of specimens, it is found that the proposed L shape connection with front-rear plate connection between Steel and Prestressed Concrete has higher strength and stiffness. From the study, Steel-PSC mixed structural system with L shaped connection has a better structural performance in connection part.

• 제어로봇시스템학회:학술대회논문집
• /
• 1993.10a
• /
• pp.994-999
• /
• 1993

To service with high quality electricity to customer, the utilities consider the DAS (Distribution Automation System) as a good means of it. The backbone of the DAS are communication and computer technique. Most of all, from the economical and functional point of view, the selection of transmission media for system communication is the key factor to achieve a successful DAS. In this paper author propose the method of the DAS communication which share its channel with CATV transmission line and analyze the effect.