• Title/Summary/Keyword: 목표 안전 수준

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Understanding and expertise in outdoor education and education-oriented (야외교육의 전문성 이해와 교육적 지향)

  • Yi, Joo-Wook;Yun, Dae-Hyun
    • Journal of Digital Convergence
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    • v.12 no.11
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    • pp.607-615
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    • 2014
  • Outdoor education emphasizes diverse experiences from the internal growth which is expected from the learners, to the ecological and environmental experiences. It is also the needs of this time and reflected in the education system of Korea. However the goal of outdoor education is not well defined and philosophical efforts to clarify it is also not enough. In this respect, we tried to define the goal and investigated professionalism of outdoor education. Specifically, we investigated the professionalism of teachers and instructors of physical education. The goal was investigated in two areas 1) holistic experience and problem solving skill and 2) aiming self-reflective practitioner. The idea was that educators must not aim simple educational efficiencies but have to become self-reflective practitioners through everyday life. The conclusions of this study are firstly, a safety manual is required to avoid possible injuries and to give first aid in an unfortunate occasion, secondly, an education program is required to train outdoor professionals and lastly, outdoor education should not remain in the boundary of formal education but should be included in non-formal education.

Implementation of Test Automation Agent for DO-330 Tool Qualified of ARINC-661 Development Tool (ARINC-661 개발 도구의 DO-330 도구 자격 획득을 위한 시험 자동화 에이전트 구현)

  • Kim, Do Gyun;Kim, Younggon
    • Journal of Platform Technology
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    • v.8 no.4
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    • pp.47-58
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    • 2020
  • DO-330 Software Tool Qualification Considerations is a guideline for development of tools used to develop/verify software and hardware installed on aircraft. And among several processes, the verification process is very crucial as it occupies a large proportion for DO-330. Especially, in order to qualify tool with high safety level, test objectives must be performed with independence, accordingly, more time, cost, and manpower are required than other objectives. In addition, even if the test cases or test procedures are well defined, the higher the complexity of the test the higher probability of human error occurs. In this paper, we propose Script-based Test Automation Agent software structure for efficient DO-330 verification process of A661UAGEN tool developed by Hanwha Systems. Compared to the test performed manually by the test engineer, testing time of the Script-based Test Automation Agent is reduced by 87.5% and testing productivity is increased by 43.75%.

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Development of Intelligent Planning and Analysis Method for Railroad Alignment Improvement (지능형 철도 선형개량 계획 및 분석 기술 개발)

  • Kim, Jeong Hyun;Lee, Jun;Oh, Jitaek;Lim, Joonbum
    • KSCE Journal of Civil and Environmental Engineering Research
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    • v.43 no.5
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    • pp.651-657
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    • 2023
  • Railroad alignment improvements and operating speed increase occupy considerable portion in recent railroad market. Developing countries have limitations to construction of new high speed railroads due to the burden of budgets and the lack of demands, and the projects of operating speed increase arepracticallyrecommended. Thisstudy developed the methodologyto provide the railroad alignment design alternatives and the costs by upgrading the "Intelligent Railroad Alignment Design Program (ei-Rail)" which has been used to obtain the alignment plans and construction costs for railroad construction projects. The program provides the cost for alignment improvement, design drafts and the effects of operating speed increase with the input of target improvement speed and the prevailing railroad alignment on the numerical map. It is then expected for the ei-Rail program to be used for the supporting tool for the railroad alignment improvement projects.

A Study on Improving the Efficiency of Facility Safety Inspection Work Using Images (영상을 활용한 시설물 안전점검 작업 효율성 향상 방안 연구)

  • Jeon, Kyungsik;Kim, Jintae;Lee, Byoungkil
    • Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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    • v.39 no.3
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    • pp.179-186
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    • 2021
  • In general, the daily safety inspection activities, which investigate damages in structures and measures the size of the damage, have been relied heavily on the visual inspection so far. Since the probe of the condition and performance of facilities by such personnel is often dependent on the subjective judgment of the investigator, the consistency and repeatability of the probing results may reduce. Particularly, damage located in a difficult-to-reach place depends mainly on experience with the naked eye, and an unsafe method using a ladder has mainly applied when necessary. Therefore, in this study, we tried to propose a way of using images that can reduce the deviation between safety inspection investigators, enhance objectivity, and improve the safety of workers. In this study, we have applied homographic transformation as a method of correcting the image. As a result of analyzing the size of the damage in the corrected image of the test subject, it confirms that the accuracy of measuring the magnitude of the damage can satisfy the target levels of 5.0mm and 0.005m2, the target accuracy levels. As a result of the field verification test to which the proposed image correction technique applied, the coefficient of variation of the crack length in the structure decreased from 5.4~7.0% to 0.072~0.12%, and that of the damaged area from 10.9% to 1.6%. It confirms that the measurement accuracy is improved. Therefore, it is expected that this study on the image utilization technique in safety inspection activities can increase the accuracy of damage measurement and improve the reliability of the safety inspection reports and exterior survey drawings.

Target Reliability Indices of Static Design Methods for Driven Steel Pipe Piles in Korea (국내 항타강관말뚝 설계법의 목표 신뢰도지수)

  • Kwak, Kiseok;Huh, Jungwon;Kim, Kyung Jun;Park, Jae Hyun;Lee, Juhyung
    • KSCE Journal of Civil and Environmental Engineering Research
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    • v.28 no.1C
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    • pp.19-29
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    • 2008
  • As a part of study to develop LRFD (Load and Resistance Factor Design) codes for foundation structures in Korea, reliability analyses for driven steel pipe piles are performed and the target reliability indices are selected carefully. The 58 data sets of static load tests and soil property tests conducted in the whole domestic area were collected and analyzed to determine the representative bearing capacities of the piles. The static bearing capacity formula and the Meyerhof method using N values are applied to calculate the expected design bearing capacity of the piles. The resistance bias factors were evaluated for the two static design methods by comparing the representative bearing capacities with the design values. Reliability analysis was performed by two types of advanced methods: First Order Reliability Method (FORM), and Monte Carlo Simulation (MCS) method using resistance bias factor statistics. The static bearing capacity formula exhibited relatively small variation, whereas the Meyerhof method showed relatively high inherent conservatism in the resistance bias factors. Reliability indices for safety factors in the range of 3 to 5 were evaluated respectively as 1.50~2.89 and 1.61~2.72 for both of the static bearing capacity formula and the Meyerhof method. The target reliability indices are selected as 2.0 and 2.33 for group pile case and 2.5 for single pile case, based on the reliability level of the current design practice and considering redundancy of pile group, acceptable risk level, construction quality control, and significance of individual structure.

Development of Foundation Structure for 8MW Offshore Wind Turbine on Soft Clay Layer (점토층 지반에 설치 가능한 8MW급 해상풍력발전기 하부구조물 개발)

  • Seo, Kwang-Cheol;Choi, Ju-Seok;Park, Joo-Shin
    • Journal of the Korean Society of Marine Environment & Safety
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    • v.27 no.2
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    • pp.394-401
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    • 2021
  • The construction of new renewable energy facilities is steadily increasing every year. In particular, the offshore wind farm market, which has abundant development scalability and a high production coefficient, is growing rapidly. The southwest sea has the highest possible offshore wind power potential, and related projects are to be promoted. This study presents a basic design procedure by the EUROCODE and considers structural safety in the development of an effective of shore wind foundation in the clay layer. In a previous study, the wind power generator of 5MW class was the main target, but the 8MW of wind turbine generator, which meets the technical trend of the wind turbine market in the Southwest sea, was selected as the standard model. Furthermore, a foundation that fulfills the geological conditions of the Southwest sea was developed. The structural safety of this foundation was verified using finite element method. Moreover, structural safety was secured by proper reinforcement from the initial design. Based on the results of this study, structural safety check for various types of foundations is possible in the future. Additionally, specialized structural design and evaluation guidance were also established.

Preliminary Hazard Analysis for Development of ICT-Based Local Control Center (ICT기반 지역제어센터 개발을 위한 예비위험원 분석)

  • Sung, Yu-Suk;Baek, Jong-Hyen;Kim, Gonyop;Kim, Youngju
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.40 no.9
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    • pp.1819-1827
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    • 2015
  • ICT-based on-board oriented train control system has been proposed to improve operation efficiency in low-density railway line. It is also needed to develop a new ICT-based local control center which relates to existing centralized traffic control lines. In order to meet the qualitative target of these developing system, RAMS activities are required. In this paper, through preliminary hazard analysis, hazards and their contributing factors are addressed, then countermeasures are established to control the risk to an acceptable level.

연구 리포트 - 국가 원자력 신기술 확보 대책과 경쟁력 제고에 대한 제안

  • Lee, Ik-Hwan
    • Nuclear industry
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    • v.36 no.11
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    • pp.29-44
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    • 2016
  • 1980~1990년대 OPR1000 기술 자립을 추진할 때도 그랬지만 한국은 원자력 기술 자립에 대한 도전이 선진국에 비해 늦었지만 과학기술자의 열정과 정부의 적극적인 지원으로 오늘날 원자력 선진국이 될 수 있었고, 원자력산업을 해외 수출 산업으로서 다양한 노력을 시도하고 있다. 특히 국내 가동 중인 원전은 외국과 차별되게 1기당 고장 정지율이 0.1건으로 외국 평균의 5.5건과 크게 대별된다. 또한 운전 신뢰성을 나타내는 발전소 가동률도 10% 이상 차로 월등히 높다. 한마디로 한국은 가장 원전의 기술 개발과 운영을 잘하고 있는 원전 선진국임을 자타가 인정하고 있다. 그러나 현재의 기술 수준에 머물면 미래 원전 기술에서는 다른 선진국 내지 중국, 인도 등 신흥국에 그 자리를 양보할 수밖에 없을 것이다. 미래 원자력이란 시대적 요건인 고유 안전성과 지속 가능성을 확보하고 경제성과 함께 핵확산 저항성이 전제되는 원자력 신기술로서 세계와의 경쟁 대상이다. 여기에 핵연료 자원의 유한성에 지속 가능성을 확보하기 위해서 우라늄 효율을 극대화하는 제4세대의 고속로 개발까지 우리나라는 선도적 위치로 가야 한다. 이 기술 개발 역시 출발은 늦었지만 적극적인 개발을 추진하고 있어 소듐고속로의 시현 원자로인 PGSFR을 2028년까지 완성하는 목표를 달성하면, 이를 근간으로 세계 선진국의 경쟁 대열에 나설 수 있다. 정부의 적극적인 지원이 선도적 위치에 갈 수 있는 지름길이다. 고속로 기술 개발과 관련하여 사용후핵연료(SF)의 국가 정책이 아직 확정되지 않아 재활용주기를 전제하고 있는 고속로 개발에 어려움을 주고 있다. 따라서 SF 부지를 2028년까지 확정하는 일정과 함께 국가 SF 정책이 조속히 확정되어야 한다.

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Comparing the Effectiveness of Punishment Severity and Policy Means on Traffic Laws Violating Drivers (위법운전자에 대한 제재 수준과 정책수단 선택의 교통안전효과 비교)

  • Myeong, Myo-Hee;kim, Kwang-Sik
    • Journal of Korean Society of Transportation
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    • v.26 no.1
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    • pp.89-100
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    • 2008
  • The purpose of this paper is to analyze the differences between the severity of punishments for traffic laws related offenders and the choice of policy measures with a view to reducing traffic accidents. To this end, government data on the drivers given a sentence of license suspension or revocation were collected and analyzed in terms of sex, age, type of driver's license, driving career, number of traffic laws violations, and number of traffic accidents generated. The statistics of analysis of covariance and tests of significance were used and conducted to compare the effectiveness of punishment for the penalty and the incentive groups. The results showed that the incentive policy measure on the drivers who violate traffic regulations repeatedly is more effective to reduce the number of traffic offenders and traffic accidents.

A Study on the Architectural Design Requirements of the Korean e-Navigation System (한국형 e-Navigation 시스템의 아키텍쳐 설계 요건에 관한 연구)

  • Park, Sang-Kook;Yoon, Dae-Gwun;Park, Jung-Dae
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
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    • 2015.07a
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    • pp.111-112
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    • 2015
  • IMO established an e-Navigation Strategy Implementation Plan(SIP) in 2014 and they aim to enforce in 2019. Accordingly, korean government also prepared e-Navigation SIP as the Next Maritime Safety Comprehensive Management System in 2015. The main content is to promote R&D by putting 131 billion won over the next five years from 2016 to 2020. On the other hand still in a situation that staying at the conception level of Korean e-Navigation System, by study the architectural design requirements of the Korean e-Navigation system, so we will be able to establish future research directions.

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