• Title/Summary/Keyword: 성능중심

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Developments of performance-based assessment technique for existing tunnels (공용중인 터널의 성능중심 평가기법 개발)

  • An, Jai-Wook;Kim, Hong-Kyoon
    • Journal of Korean Tunnelling and Underground Space Association
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    • v.18 no.6
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    • pp.525-533
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    • 2016
  • The purpose of current tunnel maintenance system in South Korea is safety-based maintenance system for accident prevention, So it is difficult to conduct a strategic maintenance. The development of a new maintenance system can lead to effective investment of limited financial and it's effort is still in progress. In this study, to develop a performance-based assessment method, indexes for assessment are derived taking into account the safety, durability and serviceability. The indexes for performance-based assessment were selected by a literature analysis and a delphi survey. Then the importance among indexes were calculated by the AHP analysis.

고성능연구망 인프라 활성화를 위한 Grid 구축

  • Jang, Haeng-Jin
    • Journal of Scientific & Technological Knowledge Infrastructure
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    • s.4
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    • pp.49-55
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    • 2001
  • 인터넷의 발생은 슈퍼컴퓨팅센터를 중심으로 구축된 고성능연구망으로부터 시작되었으며, 대부분의 선진국에서 추진중인 차세대 인터넷 프로젝트도 고성능컴퓨팅 자원 활용을 위해 구축된 고성능연구망을 중심으로 추진되었다.

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Performance Based Design for High Curability Concrete (성능중심형 고내구성 콘크리트의 배합설계)

  • Kim, S.S.;Park, K.P.;Lee, J.B.
    • Proceedings of the Korea Concrete Institute Conference
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    • 2008.11a
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    • pp.969-974
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    • 2008
  • This study was carried out to investigate the service life of reinforced concrete structures for durability design. The service life has three aspects physical service life, functional service life, and social service life, and that a structures are normally demolished to end its service life when either the functional or social service life is over before the physical service life comes to end an end. In the future, it is very important that durability design shall be performed establishing design service life and the unallowable state of deterioration in the course of design service life.

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Performance based Construction Specifications and Design Criteria Development Plan of Electrical Installations (전기설비분야 성능기준 개발 접근방법)

  • Kim, Se-Dong;Lee, Kwang-Sik;Choi, Eun-Hyeok
    • Proceedings of the KIEE Conference
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    • 2007.11c
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    • pp.117-118
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    • 2007
  • 성능중심의 건설기준을 개발하고, 성능계약제도 도입방안을 구축함으로써 시설물의 성능을 향상시키고, 생애주기비용(LCC)을 절감하며, 설계 및 시공자의 기술개발을 유도하는 것이 필요하다. 본 연구에서는 건축전기설비분야의 성능기준 개념과 외국의 도입사례를 살펴보고, 성능기준 개발 대상 및 범위를 설정하고 성능 기준 개발을 위한 접근방법을 도출하였다. 앞으로 국제 경쟁력 확보를 위해서는 성능중심의 건설기술기준 적용이 필요하다.

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Numerical Analysis of Caching Performance in Content Centric Networks Using Markov Chain (마코프체인을 이용한 콘텐츠 중심 네트워크의 캐싱 성능 분석)

  • Yang, Won Seok
    • The Journal of the Korea Contents Association
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    • v.16 no.4
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    • pp.224-230
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    • 2016
  • Recently, CCN(Content Centric Network) has been extensively interested in the literature to transfer data traffic efficiently according to the rapid growth of multimedia services on the Internet. CCN is a new networking paradigm to deliver contents efficiently based on the named content not the named or addressed host. This paper presents a mathematical approach for analyzing CCN-caching systems with two routers. Considering the stochastic characteristics of communication networks, the caching system is modeled as a two dimensional Markov chain. This paper analyzes the structural feature of the transition rate matrix in the Markov chain and presents a numerical solution for the CCN-caching performance of the two router system. In addition, various numerical examples are presented.

A User-Centric Response Time Analyzer for Improving User Experience of Android Applications (스마트폰 응용 프로그램의 사용자 경험 향상을 위한 사용자 중심 반응 시간 분석 도구)

  • Song, Wook;Sung, Nosub;Kim, Jihong
    • KIISE Transactions on Computing Practices
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    • v.21 no.5
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    • pp.379-386
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    • 2015
  • We propose a novel user-perceived performance optimization framework for the Android platform that takes advantage of the user-centric response time analysis. To this end, we propose a new definition of response time, which we call the user-centric response time, as a metric for the quality of user-perceived performance of the smartphone application. In this paper, we describe the design and implementation of an on-line user-centric response time analyzer for Android-based smartphones, which provides smartphone application developers with valuable insight for user-perceived performance optimization. We implemented the user-centric response time analyzer on the Android platform, version 4.0.4 (ICS) running on a Galaxy Nexus smartphone. From our experimental results, the proposed user-centric response time analyzer accurately estimates user-centric response times with an accuracy of 92.0% compared to manually measured times with less than 1% performance penalty. In order to evaluate the efficiency of the proposed framework, we were able to reduce the user-centric response time of the target application by up to 16.4% based on the evaluation results by the proposed framework.

Development and Performance Evaluation of an Ultra-Compact CT with Auto Calibration of Detector Center Axis (검출기 중심축을 자동 보정하는 초소형 CT 개발 및 성능평가)

  • Byeong-Woo Kwak;Keun-Ho Rew
    • Journal of the Korean Society of Radiology
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    • v.17 no.5
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    • pp.651-662
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    • 2023
  • In this study, we designed and fabricated an ultra-compact CT that automatically calibrates the detector's center axis and verified its performance. The three-dimensional reconstruction performance was evaluated using 3D CAD data and X-ray data acquired by manually calibrating the center axis of the CT detector. The results showed that tilting the center axis by more than 0.25° causes circle break phenomenon, which rapidly degrades the quality of the 3D reconstructed image. By applying the automatic calibration device of a detector center axis, the 3D reconstruction performance was enhanced by calibrating the detector center axis to match the specimen rotation axis.

Head-Percolation Rules of Constituent-to-Dependency Conversion in Korean (한국어 구절 구문 코퍼스의 의존 구문 구조 트리로의 변환에서 중심어 전파 규칙)

  • Choi, Yong-seok;Lee, Kong Joo
    • Annual Conference on Human and Language Technology
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    • 2018.10a
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    • pp.514-519
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    • 2018
  • 본 연구에서는 세종 구문 코퍼스를 의존 구문 코퍼스로 변환할 때 사용되는 중심어 전파(Head-Percolation) 규칙에 대하여 논의한다. 한국어는 중심어-후위 언어이기 때문에 의존 구문 트리를 구축할 때 지배소를 의존소 뒤에 배치시키는 것을 원칙으로 하였다. 그러나 의존 관계에 있는 단어 사이에 지배소를 앞쪽으로 설정하는 것이 더 자연스러운 경우가 있다. 본 연구에서는 지배소를 앞쪽으로 배치시키는 것을 허용하는 중심어 전파 규칙을 채택하여 의존 구문 코퍼스를 구축해 보고 중심어 전파 규칙이 구문 분석기의 성능에 어떤 영향을 미치는지 살펴본다. 실험 결과 지배소를 앞쪽으로 설정하는 것을 허용한 경우, 0.43%의 성능 저하가 있었으나 학습 코퍼스의 일관성을 유지한다면 성능 저하의 차이를 좀 더 줄일 수 있을 것이다.

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A Study on Approach Method for Standardization of Contruction Specifications and Design Criteria based on Energy Performance of Electrical Installations in Buildings (건축전기설비분야의 에너지절약 요소기술 설계편람 개발)

  • Kim, Se-Dong;Lee, Kwang-Sik;Park, Won-Joo;Choi, Eun-Hyeok
    • Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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    • 2009.10a
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    • pp.387-390
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    • 2009
  • 앞으로 국제경쟁력 확보를 위해서는 성능중심의 건설기술기준 적용이 필요하다. 성능중심의 건설기준을 개발하고, 성능계약제도 도입방안을 구축함으로써 시설물의 성능을 향상시키고, 생애주기비용 (LCC)을 절감하며, 설계 및 시공자의 기술개발을 유도하는 것이 필요하다. 본 연구에서는 건축전기설비분야를 중심으로 에너지절약 요소기술을 발굴하고, 설계기준에 기술하기 곤란한 사항, 기술자가 효율적인 업무수행을 위하여 필요한 사항들을 도출하여 실무에 쉽게 활용하도록 설계편람을 작성하는데 있다.

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