• Title/Summary/Keyword: Safety management efficiency

검색결과 865건 처리시간 0.024초

유휴공간을 활용한 도시물류 시스템의 안전성 향상을 위한 모델기반 분석 (Model-based Analysis to Improve the Safety of Urban Logistics System Using Vacant Space)

  • 박재민;김주욱;김영민
    • 대한안전경영과학회지
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    • 제24권1호
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    • pp.1-9
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    • 2022
  • The growth of the online market is accelerating due to the development of technology and the pandemic era. The delivery service through the courier must be used to deliver the ordered goods to the customer through the online market. With the growth of the online market, the logistics market for delivery is also growing. The traffic and environmental problems are emerging as social issues. Urban logistics technology using underground space based on the urban railway developed to improve logistics efficiency in a metropolitan area and a new alternative to environmental problems. This study proposed a plan to secure system safety through safety analysis based on operational concept definition and scenario analysis by applying model-based perspective analysis to the system under development.

가압중수로 증기발생기의 경년열화 관리를 위한 안전성 평가 시스템 개발 (Development of a Safety Assessment System on Aging Management in Existing CANDU Steam Generators)

  • 신소은;이정훈;박동규;정종엽
    • 시스템엔지니어링학술지
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    • 제10권1호
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    • pp.49-56
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    • 2014
  • Since steam generator (SG) tubes are located in the boundary between the primary and secondary systems of nuclear power plant (NPP), the SG is one of the most important components in the aspects of the safety of NPP. The magnetite ($Fe_30_4$) deposition, so-called fouling, is generally known as a major aging mechanism of CANDU SGs, and this aging mechanism makes the heat transfer efficiency between the primary and secondary systems of NPP reduced. Therefore, the development of SG safety assessment system which can evaluate the effect of the SG aging degradation mechanism should be needed for safety of NPP. In this study, through the suggestion of the guideline for SG safety assessment, it is possible to strengthen the basic of establishing the effective SG aging management technique. The SG safety assessment is carried out by CATHENA(Canadian Algorithm for THErmalhydraulic Network Analysis). It is possible to determine the integrity of SGs by identifying the main safety parameters which can be changed by the aging degradation of CANDU SGs.

폐자동차의 해체기술 동향 (Trends of Disassembly Technique on End of Life Vehicle)

  • 이현용;송준엽;강재훈
    • 대한안전경영과학회:학술대회논문집
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    • 대한안전경영과학회 2001년도 춘계학술대회
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    • pp.211-215
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    • 2001
  • In the last year, the number of registered vehicles in Korea surpassed the 12 million mark, and increase in number continuously Nowdays, this tendency has raised some problems inevitably in the view of expansion of ELV(end of life vehicle) and earth environment pollution resulted from it. For the proper scope with this environment pollution, recycling of parts and materials, minimization of wastes are desirable. And application of disassembly technology is required for it necessarily. Therefore it is essential to study systematically about disassembly technology of ELV with high efficiency for improvement recycling ratio and diminution shredder dust amount also in Korea.

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Algorithms for Reliability Calculation of Multistate System

  • Seong Cheol Lee
    • 대한안전경영과학회:학술대회논문집
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    • 대한안전경영과학회 2001년도 춘계학술대회
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    • pp.173-178
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    • 2001
  • This paper studies the structure and reliability of homogeneous s-coherent multistate system. We describe efficiency of inclusion-exclusion algorithm and pivotal decomposition algorithm for reliability calculation of 2-states system which developed in (Lee 1999) [10]. We extend our method, applied in [10], to the case when components of the system are given multi-states. As an application, the high pressure injection system of a pressurized water reactor is modeled as a multistate system composed of homogeneous s-coherent multistate subsystems. And Several examples are illustrated.

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산재예방과 산재보험제도 관계의 효율성 제고에 관한 연구 (A Study in Efficiency that relation between Prevention of Industrial Accident and Industrial Insurance)

  • 서규석;김대호;김병석
    • 대한안전경영과학회:학술대회논문집
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    • 대한안전경영과학회 2006년도 춘계공동학술대회
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    • pp.223-227
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    • 2006
  • 본 연구는 산업재해를 둘러싼 위험에 대한 리스크 관리적 관점에서 산업재해에 대한 물리적 안전망의 정교성 및 범위와 산업재해에 대한 사전 안전망으로서 산재예방과, 재해발생시 이에 대한 경제적 및 의료적 보호를 위한 사후 안전망으로서 산재보험의 역할을 분석하였으며, 안전망의 강화를 위한 이들 산재 안전망의 향후 과제에 관한 연구를 다루었다.

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이중 셔틀 자동창고 시스템의 주행시간 모델에 관한 연구 (A Study on Travel Time Model of double shuttle AS/RS)

  • Chae-Soo Kim;Seong-Whan Shinn
    • 대한안전경영과학회지
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    • 제3권3호
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    • pp.97-106
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    • 2001
  • This paper considers automated storage and retrieval systems with double shuttle. We developed the expected travel time model based on the first come first served rule. An heuristic procedure by retrieval order sequencing was presented which aimed to improve the operation efficiency laking advantage of "No cost zone". Through sensitivity study, we evaluated the performance of the double shuttle system working on the four command cycle.

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택배시스템에 있어서 철도운송의 이용 가능성 평가 (The evaluation for availability of railway transportation in home delivery service system)

  • 김상직;주용준
    • 대한안전경영과학회지
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    • 제2권3호
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    • pp.61-79
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    • 2000
  • It is very important to delivery timely and safely items in logistics. So, the home delivery service system is introduced by many enterprises. Also, the beginning in 1990's, the rapid increase of automobile increased logistics cost and led to road stagnation. So, the railway transportation use in logistics can be considered. The railway transportation in home delivery service system can overcome the limit of transportation by land. This study evaluate railway transportation in home delivery service system by economical efficiency and timeliness.

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분류 알고리즘의 효율성에 대한 경험적 비교연구 (The empirical comparison of efficiency in classification algorithms)

  • 전홍석;이주영
    • 대한안전경영과학회지
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    • 제2권3호
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    • pp.171-184
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    • 2000
  • We may be given a set of observations with the classes or clusters. The aim of this article is to provide an up-to-date review of different approaches to classification, compare their performance on a wide range of challenging data-sets. In this paper, machine learning algorithm classifiers based on CART, C4.5, CAL5, FACT, QUEST and statistical discriminant analysis are compared on various datasets in classification error rate and algorithms.

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컴퓨터 내장형 냉각시스템 개발 (Development for Inserted Type Coling System in Computer)

  • 이현용;임선종
    • 대한안전경영과학회:학술대회논문집
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    • 대한안전경영과학회 2009년도 추계학술대회
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    • pp.399-404
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    • 2009
  • The research for computer cooling system has been researched briskly at home and abroad. Most of computer cooling systems are the air cooling method using cooling fan. The air cooling system are most widely used for low cost and easy installation but have limits in cooling. The water cooling system are good for cooling efficiency but bad for installation. This paper presents the developing for cooling system to be inserted in computer using thermoelectric module.

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우리나라 대기업의 지배구조 개선에 관한 연구 (A Study on Governance Structure Improvement of Large Corporate in Our Country)

  • 이재범
    • 대한안전경영과학회지
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    • 제5권1호
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    • pp.143-162
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    • 2003
  • The governance structure of corporate is very important to raise the nation's economic efficiency and the operation result of firm. However, the innovation of corporate governance structure is a important problem to improve international confidence in our country, since most large corporate in our country has a promodern governance structure to be influenced in decision making of corporate group by minority governance-shareholder. Therefore, in our country the improvement of corporate governance structure is very urgent. This study examine the improvement device of corporate governance structure to be introduced in our country, and present the improvement direction to be suitable to our country's economic circumstance.