• Proceedings of the Korean Information Science Society Conference
• /
• 2003.10c
• /
• pp.361-363
• /
• 2003

지리적으로 분산된 이 기종의 유휴 자원들을 서로 연결하여 가상의 고성능 컴퓨팅 자원으로 사용하는 그리드에서 자원에 대한 접근 제어 시스템의 구축은 필수적이다. 본 논문에서는 자원에 대한 접근 제어 시스템을 설계 및 구현한다. 특히, 그리드 환경 구축 시 가장 많이 사용되는 Globus Toolkit을 기반으로 하고 각 자원을 제공하는 사이트의 자율성을 보장하는 자원 접근 제어 시스템을 설계 및 구현하였다.

• Journal of the Korean Society of Safety
• /
• v.21 no.5 s.77
• /
• pp.72-76
• /
• 2006

This study deals with problems of technical assistance through accidents analysis and questionnaires on small-sized construction sites which are difficult to understand real condition and administrate legally and indicated following efficient methods of technical assistance. (1) Ensuring access to the small-sized construction sites. (2) Delegation technical assistance service to civilian and supporting selected. (3) Raising of the person's safe consciousness concerned with the small-sized construction sites. (4) Safety consulting for the head office of small-sized construction sites.

• Proceedings of the Korean Operations and Management Science Society Conference
• /
• 2004.10a
• /
• pp.623-626
• /
• 2004

최근 이동망 경쟁활성화 및 이용자 후생확대를 위하여 로밍, MVNO, 사이트 공유(site sharing), 매스트 공유(mast sharing), 무선접속망 공유(radio access network sharing), 무선 코어망공유(radio and core network sharing) 등 다양한 제도들이 검토되고 있다. 이 가운데 로밍과 MVNO제도가 현시점에서 가장 보편적으로 이용되고 있다. 논문은 이동망 네트워크 공유제도에 대하여 로밍과 MVNO제도를 중심으로 분석하고, 마지막으로 국내 이동통신 시장에 적용될 수 있는 바람직한 정책적 시사점을 도출하고자 한다.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
• /
• v.13 no.8
• /
• pp.804-810
• /
• 2002

The code division multiple access(CDMA) system capacity is limited by the amount of interference of the system. To reduce the unnecessary interference, this paper proposes optimized cell identification codes for site selection diversity transmission(SSDT) power control in wideband code division multiple access system of third generation partnership project(3GPP). The main objective of SSDT power control is to transmit on the downlink from the primary cell, and thus reducing the interference caused by the multiple transmission. In order to select a primary cell, each cell is assigned a temporary identification(ID) and user equipment(UE) periodically informs a primary cell ID to the connecting cells during soft handover. The non-primary cells selected by UE do not transmit the dedicated physical data channel(DPDCH) to reduce the interference. A major issue with the SSDT technology is the impact of uplink symbol errors on its performance. These errors can corrupt the primary ID code and this may lead to wrong decoding in the base station receivers. The proposed SSDT cell ID codes are designed to minimize the problem and to be easily decoded using simple fast Hadamard transformation(FHT) decoder.

• Journal of the Korean Geotechnical Society
• /
• v.34 no.12
• /
• pp.115-131
• /
• 2018

Extension plate attached PHC piles and bolts spliced PHC piles were installed in field test site. Pile integrities were checked during installation with dynamic pile test and the actual pile conditions after installation were compared with integrity index (${\beta}$ index) by PDA test. Theoretically the break in near pile end or pile end (especially extension plate itself) was very difficult to access by integrity index (${\beta}$ index) and also require a high level of knowledge and field experience on PDA test. First actual wave equation of bolts spliced PHC piles due to bolts spliced equipment can be different with welding spliced. Second wave length of the stress wave from installing can be longer than the height of bolts spliced equipment (about 100 mm). Third Beta processing in PDA analysis function is very difficult to access without a high level of knowledge and field experience on wave equation. Above-mentioned three reasons can make conclusion that traditional PDA test in domestic site can not access the integrity of bolts spliced equipment in bolts spliced PHC piles.

• ETRI Journal
• /
• v.36 no.2
• /
• pp.293-300
• /
• 2014

As the system-on-chip (SoC) design becomes more complex, the test costs are increasing. One of the main obstacles of a test cost reduction is the limited number of test channels of the ATE while the number of pins in the design increases. To overcome this problem, a new test architecture using a channel sharing compliant with IEEE Standard 1149.1 and 1500 is proposed. It can significantly reduce the pin count for testing a SoC design. The test input data is transmitted using a test access mechanism composed of only input pins. A single test data output pin is used to measure the sink values. The experimental results show that the proposed architecture not only increases the number of sites to be tested simultaneously, but also reduces the test time. In addition, the yield loss owing to the proven contact problems can be reduced. Using the new architecture, it is possible to achieve a large test time and cost reduction for complex SoC designs with negligible design and test overheads.

• Journal of the Korean Institute of Landscape Architecture
• /
• v.31 no.1
• /
• pp.78-89
• /
• 2003

This paper presents a community participatory small-park design. It proposes that environmental planning and design can be understood as a communicative action that aims to achieve consensus among stakeholders through communication with the local residents. By studying the communicative action theory and communicative planning theory, three strategies were set for practicing small-park design as a communicative action: (1) stakeholders should how what data and actions are needed; (2) citizens should have access to the data and participate in the process; (3) the community's concerns should be consulted and their opinions heard. In applying the three strategies to the small-Park design, a council composed of experts, community members, and NGO's was established. All processes were then executed after careful deliberation. From interviews, the town-touring program and surveys, the design of the site was determined among the stakeholders. The site was subsequently designed based on the needs of the community and revised according to their suggestions. Finally, the small park was constructed. Even though the researchers experienced many limitations because the site is very small, the significance of this study can be outlined as follows: (1) the need to construct the park was suggested by the community rather than by the administration; (2) experts, members of the community, and NGO's constituted the council; (3) the design process involved deliberation among the members of council rather than a method previously established by experts; (4) the administration supported rather than led the entire process: (5) citizens discussed and reached a consensus by themselves.

• The Journal of Korea Robotics Society
• /
• v.16 no.3
• /
• pp.199-206
• /
• 2021

The robot is an effective means to perform repetitive tasks quickly and accurately. It could be more effective in dangerous environments where human is difficult to access. The construction site is a dangerous environment with a high possibility of industrial accidents where heavy work is frequently carried out at a high place. In particular, an accident in the construction site is highly likely to lead to a severe disaster. Of course, various technologies are being developed to monitor the safety of workers in construction sites and prevent accidents, but there is a limit to eliminate the risk of accidents. Therefore, it is necessary to make efforts to replace workers exposed to dangerous environments with equipment or robots that could be controlled remotely in a more active way. In this study, Remote Precise Installation System was proposed to replace the workers exposed to the risk of accident at a high place during the bridge construction. Also, the conceptual design and analytical reviews of this system were carried out. Suppose Remote Precise Installation System is developed according to the derived concept and the target performance. In that case, this system is expected to be applied as a technology that can effectively replace the workers at the bridge construction site.

• Asia Pacific Journal of Business Review
• /
• v.3 no.1
• /
• pp.39-55
• /
• 2018

This study emphasizes the necessity of implementing political supports for artists and suggests several details to develop related industries. For these objectives this study analyzes the trend in related researches and overhauls the aid system. It then comes up with results about how artists are aware of the supporting system by conducting a survey of 140 artists. The result of summarize as follows. First, most of the artists have severely limited access to government-funded or private aid programs. This signals the urgency of establishing an integrated portal site since the artists aren't evenly offered the information they need. Along with this, artists should note that the main purpose of this portal site is focused on providing information related to livelihoods. Secondly, the analysis shows the lack of infrastructure for supporting artists. Both governmental and private sectors should take charge of establishing art consulting agencies which can bring efforts to improve rights and interests of many artists via a number of channels. Supporting artists also presents its necessity about solving social problems besides the one suggested by previous studies. This study has its significance by implying the actual perspectives of artists while most of the related studies are rather theoretical.

• International conference on construction engineering and project management
• /
• 2022.06a
• /
• pp.1138-1145
• /
• 2022

While pursuing digitalization and paperless projects, the construction industry needs to settle on how to make the most of digitized data and information. On-site workers, who currently rely on paper documents to check and review design and construction plans, will need alternative ways to efficiently access the information without using any paper. Augmented Reality is a potential solution where the information customized to a user is aligned with the physical world. This paper proposes the Augmented Reality framework to deliver the information on on-site resources (e.g., workers and equipment) using head-mounted devices. The proposed framework was developed by interoperating Augmented Reality-supported devices and a digital twin platform in which all information related to ongoing tasks is accumulated in real-time. On-site resources appearing in the user's field of view are automatically detected by an object detection algorithm and then assigned to the corresponding information by matching the data in the digital twin platform. Preliminary experiments show the feasibility of the proposed framework. Worker detection results can be visualized on HoloLens 2 in near real-time, and the matching process obtained the accuracy greater than 88%.