• Title/Summary/Keyword: 표준화 절차

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Development of BIM for a Maintenance System of Subway Infrastructures (지하철 구조물 유지관리 시스템을 위한 BIM 개발)

  • Shim, Chang-Su;Kim, Seong-Wook;Song, Hyun-Hye;Yun, Nu-Ri
    • Journal of KIBIM
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    • v.1 no.1
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    • pp.6-12
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    • 2011
  • BIM(Building Information Modeling) technologies are the most effective for the maintenance of infrastructures because they provide information sharing througout the life-cycle of structures and support close communication between different project stages. Systematic and well-organized data play a fundamental role for the effective maintenance of subway tunnel. In this paper, 3D information models for maintenance of BIM-based subway tunnel structures are developed. Standard classifications for the maintenance and construction information classification system were adopted. A classification system based on construction information classification system was built considering procedures of maintenance work. It provides optimization and standardization of the work flow for the maintenance of subway structures by applying information modeling processes instead of the current maintenance practices. It can effectively reduces the life cycle cost and time for the maintenance. The proposed system can be utilized for the maintenance history management to enhance current maintenance system.

The Improvements for 3GPP LTE-Advanced Relay (3GPP LTE-Advanced을 위한 Relay 개선 방안)

  • Park, Byoung-Seong;Kim, Sang-Ha;Chang, Il-Doo;Lee, Hee-Bong;Kwon, Kyoung-In
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.36 no.12B
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    • pp.1647-1658
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    • 2011
  • This paper suggests the methods to improve the wireless backhaul link of the Relay FDD mode that 3GPP LTE-Advanced supports. New RRC message and Relay startsup procedure are introduced to apply Carrier Aggregation in the Relay wireless backhaul. Also, we design new reference signal that makes Type 1 Relay operated in full-duplexing, expecting to maximize the radio resource utilization. And, we propose the efficient configuration for the periodic uplink control information under the backhaul subframe allocation method in LTE-Advanced Relay. Hereafter, the standard activities in the 3GPP RAN is supposed to focus on the improvement of the LTE-Advanced features. Therefore, the suggestions in this paper are expected to be actively discussed in the LTE-Advanced future releases.

A Study on Development of Construction Industry's Accounting Information System (건설 산업 회계정보시스템 구축 방안에 대한 연구)

  • Kang, Dong-Il;Yoon, Sung-Yong
    • Journal of Digital Convergence
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    • v.13 no.3
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    • pp.127-135
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    • 2015
  • This study has become a construction company will help you establish a Management Accounting System target model to move forward. Research method was to present the basic concepts and techniques used in managing complex accounting convergence look at the whole construction industry. For the successful deployment of a construction company management accounting system Responsibility Accounting System, Target Profit, Target Cost, and requires a key technique of Performance Evaluation, which the CEO's firm determination and persistence for support, proactive communication in the field and headquarters staff, the goal organizations and institutions to support the model, the standardization is required. This study is based on case studies in the future through the Delphi Method and AHP are needed.

A Study on the Condensation Performance of The Curtain-walls (커튼월 결로 성능평가에 관한 연구)

  • Lee, Sang-Jin;Ock, Jong-Ho;Kim, Sung-Keun
    • Proceedings of the Korean Institute Of Construction Engineering and Management
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    • 2008.11a
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    • pp.808-812
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    • 2008
  • Recently, the buildings have been likely to shape Super Tall trend. Therefore, the exterior parts of the buildings come to be changed. Instead of early heavy wall structure, it is changed to light wall concept of curtain wall system. However, the curtain wall system causes lots of loads due to the external surrounding factors of building. In particular, due to the densely built-up condition in Korea, the generation of dew condensation is getting severer Since there has been no standardized process that reviews this generation of dew condensation, it is very urgent for us to prepare the reviewing process for the dew condensation for construction business managers. The purpose of this study is to assess dew condensation function of the curtain wall and provide the basic data for the provision of the future dew condensation review process by comparing and analyzing the range of generation of dew condensation as well as temperature distribution according to the change of relative humidity at the identical temperature by selecting the Unitized system and Stick system which are the representative types of curtain wall system.

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Study on the Determination of Fatigue Damage Parameter for Rubber Component under Multiaxial Loading (다축하중이 작용하는 방진고무부품 피로손상 파라미터 결정에 관한 연구)

  • Moon, Seong-In;Woo, Chang-Su;Kim, Wan-Doo
    • Elastomers and Composites
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    • v.47 no.3
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    • pp.194-200
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    • 2012
  • Rubber components have been widely used in automotive industry as anti-vibration components for many years. These subjected to fluctuating loads, often fail due to the nucleation and growth of defects or cracks. To prevent such failures, it is necessary to understand the fatigue failure mechanism for rubber materials and to evaluate the fatigue life for rubber components. The objective of this study is to develop the durability analysis process for vulcanized rubber components, which is applicable to predict fatigue life at initial product design step. The determination method of nonlinear material constants for FE analysis was proposed. In order to investigate the applicability of the commonly used damage parameters, fatigue tests and corresponding finite element analyses were carried out and strain energy density was proposed as the fatigue damage parameter for rubber components. The fatigue analysis for automotive rubber components was performed and the durability analysis process was reviewed.

Development of the Qualitative Model for Post Construction Evaluation (건설공사 사후평가의 정성평가 모델 개발)

  • Lee, Kyu-Sun;Park, Hee-Sung
    • KSCE Journal of Civil and Environmental Engineering Research
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    • v.38 no.5
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    • pp.733-739
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    • 2018
  • Various public construction projects have been performed for public welfare and appropriate evaluation of the effectiveness and efficiency has been required. In accordance with legislation of a post construction project evaluation in Construction Technology Promotion Act, all construction projects that exceed 30 billion won in budget are required to perform post evaluation. Korean Government provides post construction evaluation manual that includes both quantitative and qualitative criteria. However, it only provides general concepts and procedures not but detail guidelines for different construction project types and characteristics. Therefore, this paper developed a standard format for qualitative evaluation using survey through analyzing previous cases and research. As a result, the developed standard for survey can be applied for most civil and architectural facilities. However, it will need further research regarding establishment of detailed evaluation criteria for each type of facilities and data storage system for feedback.

An Investigation of EMI Reduction Technique using the Spread Spectrum for an Automotive Power Converter (EMI 개선을 위해 자동차용 전력변환기에 적용된 주파수 확산 기법 분석)

  • Chae, Gyoo-Soo
    • Journal of the Korea Convergence Society
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    • v.9 no.2
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    • pp.1-6
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    • 2018
  • In this study, the investigation results of conducted and radiated emission for DC/DC converter circuit applied in electric vehicles are presented. A frequency spreading circuit was used to improve the EMI characteristics of a power converter designed by using MPQ4433 chip. The frequency spreading circuit using a TLV3201 chip was designed and applied to the power converter. A PCB was fabricated based on the EMI minimization procedures and simulated and measured results were presented for the far-field and near-field conducted and radiated emissions using the fabricated circuit. The measurement were done as CISPR 25 standardized test procedures. It is clearly showed that the EMI characteristics were improved 20% in case frequency spreading was applied. The EMI reduction technique using the frequency spreading proposed in this study was first applied to the design of power converter module for automobile. It is expected that the method presented here can be effectively used for EMI improvement in the future.

A Study on the Electronic Processing of Bidding Business for Public Procurement in Construction Industry (건설산업 공공조달을 위한 입찰업무 전자처리에 관한 연구)

  • Ahn Kwang-Hoon;Cheon Bong-Gi;Kim Seung-Kyun;Kim Yea-Sang
    • Korean Journal of Construction Engineering and Management
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    • v.3 no.2 s.10
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    • pp.114-120
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    • 2002
  • Traditional bidding process and activities in public construction area has many problems in terms of the transparency and fairness of administration. And, it causes many expenses to suppliers. As part of the efforts to solve these problems, some public institutions developed the electronic bidding systems. But these systems have still problems in diverse aspects. Therefore, the purpose of this study is to analyze current bidding systems through literature survey, Questionnaire, contentment estimation and IDEF method to compare the result of the analysis with the developed electronic bidding systems and to suggest the improvement for the coming bidding systems. According to the survey, under present bidding system big problem is inconvenience of conducting process. Nearly all users of current electronic bidding systems were contented. When public institutions are planning new electronic bidding systems, standardization, security, law and bidding system consolidation must be applied. This study proposes an improved bidding system and described the effects through the improvements.

A Study of Establishment of Softwaresystem Configuration for Improving Health Information Sharing (의료정보 공유기능 향상을 위한 소프트웨어시스템 기반구성 방법에 관한 연구)

  • Han, Soon-Hwa;Ju, Se-Jin
    • Journal of Digital Contents Society
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    • v.15 no.1
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    • pp.11-18
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    • 2014
  • The strength of our country is based on high-speed networks to build a nationwide health information network to improve the quality of health care is needed. However, nature of the medical services in the hospital medical record form, so that all departments characterize each medical department, a common format that can be used for all disease is a very difficult challenge. This study is one of the ways to improve this priority issue on health information sharing medical information system(PACS/HIS) information linkage between the problem of information, compatibility and security issues derived. The problem is derived from the requirements of theorem 3 to 6 items. This is effective in order to improve sharing of medical information for the purpose of designing the software system. Sharing of medical information software system design are derived from stakeholders, requirements analysis, architecture design, software framework, configuration, architecture evaluation process. This study is based on the medical information standardization environmental diagnosis of a medical information system design. Software design philosophy is based on a new framework for deriving the function and mechanism made up.

Developing Measurement System for Key Performance Indicators on Building Construction Projects (건설 프로젝트 효율적 성과관리를 위한 핵심 지표 체계 구축)

  • Cha, Hee-Sung;Kim, Tae-Kyoung
    • Korean Journal of Construction Engineering and Management
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    • v.9 no.4
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    • pp.120-130
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    • 2008
  • In construction industry, project performance should be evaluated in terms of project value objectives, i.e., cost, time, quality, safety, and environment. However, there have been few, if any, systematic approaches in assessing comprehensive performance level which encompasses the whole spectrum of project value objectives. It is non trivial to establish the standardized performance metric system due to the project individualities. This study provides a new approach in assessing the wide variety of project performance types by collecting the real industry project data. In addition, the proposed system has been validated through industry survey on project practitioners. It is concluded that the developed quantitative project performance measurement system would be effectively useful in indicating the level of current status of a particular project and furthermore, to provide a meaningful strategy for the future project in a more sustainable way.