• 제목/요약/키워드: Safety measure time

검색결과 425건 처리시간 0.028초

대규모 위락시설의 피난안전성능 평가에 관한 연구 (A Study on Safety Assessment of the Evacuation at the Large-scale Amusement Facilities)

  • 박봉래;공하성
    • 한국화재소방학회논문지
    • /
    • 제23권4호
    • /
    • pp.165-173
    • /
    • 2009
  • 성능위주의 설계가 법제화 되면서 화재 및 피난에 대한 연구가 활발히 진행 중이다. 성능위주설계는 인명의 안전성을 증대 시키는 방향으로 발전되어야 한다. 또한, 성능위주의 설계는 소방분야뿐만 아니라 건축법령에서 정하고 있는 피난에 관한 규정을 포함하여 검토되어야 한다. 본 논문은 성능위주의 설계 시 참고가 될 자료로 제시하기위해 다중이용시설인 광주광역시의 OO나이트클럽을 하나의 모델로 삼아 피난시간을 예측하였다. 이를 위해 우리나라와 외국의 피난에 관련된 규정과 연구논문들을 검토하고, 현장을 방문하여 자료를 수집하였다. 그리고 수집된 자료들을 피난프로그램인 Simulex의 입력 자료로 사용하여 피난시간을 측정하였다. 이 연구의 검토과정 및 결과에서 몇 가지 문제시되는 사항을 발견할 수 있었다.

제방 안전관리를 위한 Flex센서와 FBG센서의 적용성 검토 (Suitability Examination of Flex sensor and FBG Sensor for Levee Safety Management)

  • 이인제;이은태;강정훈;김동민;장기태
    • 한국수자원학회논문집
    • /
    • 제41권11호
    • /
    • pp.1135-1142
    • /
    • 2008
  • 하천제방의 붕괴 요인중 구조물(배수통문) 주변 제방의 붕괴는 전체 요인의 l0% 이상을 차지하고 있으며, 특히 2002년 홍수시 낙동강에서 발생한 제방 유실 지점은 거의 배수통문 주위에서 발생하였다. 이러한 제방 파괴는 이질 재료인 통문 구조물과 제체 접합부 사이에 공극이나 공동이 형성된 후 홍수시 내부 침식으로 인해 공동이 확대되어 발생하는 파괴구조를 가지고 있다. 이러한 상황에서 하천제방의 안전관리를 위해 배수통문 주변의 공동발생 여부 혹은 공동내의 흐름 인지 등을 목적으로 한 연구가 진행되고 있으며, 본 연구에서는 Flex센서와 Fiber bragg grating 센서의 변이 계측에 대한 실험을 통해 두 센서의 특징을 파악하고, 하천제방의 안전관리를 위해 보다 적합한 센서의 결정이 가능하도록 하였다. 실험결과 현 시점에서 변이 계측과 관련하여 계측치의 일관성, 미소변이 계측 등 Flex센서의 단점을 보완할 수 있는 FBG센서의 여러 특징을 확인할 수 있었다.

갈매기표지의 개선을 위한 현장시험평가 연구 (In-site Evaluation of Chevron Alignment Sign)

  • 노관섭;김용석;최재성
    • 대한교통학회지
    • /
    • 제14권3호
    • /
    • pp.143-154
    • /
    • 1996
  • Since chevron alignment sign provides a user with information of road's alignment, it plays an important role in improving the safety aspects of the highway. Currently, it is installed without reasonable design specifications and maintained under insufficient labor and working time. This study, therefore, reviewed the current specifications involving design, installation, shape, and color and several alternatives were generated. The readibility and visibility were chosen as measure of effectiveness to compass these alternatives. Furthermore, spacing of sign was evaluated. The field study resulted that yellow background with black sign was more realible and visible than the other alternatives.

  • PDF

공용중 도로하부의 굴착터널 해석 및 계측 연구 (An Analytical and Experimental Study on the Mechanical Behavior of Excavating Turnels beneath the Roadway)

  • 정광모;방명석
    • 한국안전학회지
    • /
    • 제27권5호
    • /
    • pp.99-104
    • /
    • 2012
  • A turnelling work beneath roadways or railways in use is unsafe and dangerous. A turnelling method should be analytically and experimentally studied to verify stability and safety of excavating works by construction step. The conventionally analytical method was ineffective in computational time and cost, so the new analytical method named homogenuity method, was developed and verified compared with analytical results. That method was applied to parameterly study the effect of distance of steel supports and overburdening height of soil. It showed that the homogenuity method was very practical and effective in step-by-step analysis considering construction sequences. A measuring device was set at the construction field and mechanical behavior was monitored during construction. Measuring values are larger than analytical values because impact of inserting steel pipes, lowering level of underground water and vibration of passing vehicles affected soil density during construction, but those values were within allowable limits.

동위원소를 이용한 연안역 현장실험 (A Field Tracer Experiment by Using a Radioisotope near the Offshore)

  • 김기철;박건형;이진용;정성희;민병일;서경석
    • 방사선산업학회지
    • /
    • 제6권1호
    • /
    • pp.41-47
    • /
    • 2012
  • A field tracer experiment using a radioisotope was conducted to analyze the transport and dispersion characteristics of pollutants in the coastal area near a Wolsung. A rod float including GPS was released to track the paths of radioisotope. NaI detector was installed to measure the released radioisotope from the boat, and measurements were performed with the real time. The measured tracer data by a field experiment can be used as the basic data for understanding the transport characteristics of pollutants and verifying numerical models near the offshore.

Post-earthquake fast building safety assessment using smartphone-based interstory drifts measurement

  • Hsu, Ting Y.;Liu, Cheng Y.;Hsieh, Yo M.;Weng, Chi T.
    • Smart Structures and Systems
    • /
    • 제29권2호
    • /
    • pp.287-299
    • /
    • 2022
  • Rather than using smartphones as seismometers with designated locations and orientations, this study proposes to employ crowds' smartphones in buildings to perform fast safety assessment of buildings. The principal advantage of using crowds' smartphones is the potential to monitor the safety of millions of buildings without hardware costs, installation labor, and long-term maintenance. This study's goal is to measure the maximum interstory drift ratios during earthquake excitation using crowds' smartphones. Beacons inside the building are required to provide the location and relevant building information for the smartphones via Bluetooth. Wi-Fi Direct is employed between nearby smartphones to conduct peer-to-peer time synchronization and exchange the acceleration data measured. An algorithm to align the orientation between nearby smartphones is proposed, and the performance of the orientation alignment, interstory drift measurement, and damage level estimation are studied numerically. Finally, the proposed approach's performance is verified using large-scale shaking table tests of a scaled steel building. The results presented in this study illustrate the potential to use crowds' smartphones with the proposed approach to record building motions during earthquakes and use those data to estimate buildings' safety based on the interstory drift ratios measured.

전리방사선 노출과 관리 (Exposure Assessment and Management of Ionizing Radiation)

  • 정은교;김갑배;송세욱
    • 한국산업보건학회지
    • /
    • 제25권1호
    • /
    • pp.27-35
    • /
    • 2015
  • Objectives: To investigate safety and health management, conditions in factories or facilities handling radiation-generating devices and radioactive isotopes were reviewed in terms of regulations of radiation safety control in Korea. Radiation exposure levels generated at those facilities were directly measured and evaluated for establishing an effective safety and health management plan. Methods: Government organizations with laws and systems of radiation safety and health were investigated and compared. There are three laws governing radiation-related employment such as occupational safety and health acts, nuclear safety acts, and medical service acts. We inspected 12 workplaces as research objects:four workplaces that manufacture and assemble semiconductor devices, three non-destructive inspection workplaces that perform inspections on radiation penetration, and five workplaces in textile and tire manufacturing. Monitoring of radiation exposure was performed through two methods. Spatial and surface monitoring using real-time radiation instruments was performed on each site handling radiation generating devices and radioactive isotopes in order to identify radiation leakage. Results: According to the occupational safety and health act, there is no legal obligation to measure ionizing radiation and set dose limits. This can cause confusion in the application of the laws, because the scopes and contents are different from each other. Surface dose rates in radiation generating devices such as implanters, thickness gages and accelerators, which were registered according to nuclear safety acts, using surveymeters, and seven of 36 facilities(19.4%) exceeded the international standards for surface radiation dose of $10{\mu}Sv/hr$. Conclusions: The results showed that occupational health and safety acts require a separate provision for measuring and assessing the radiation exposure of workers performing radiation work. Like noise, ionizing radiation will also periodically be controlled by including it in the object factors of work-environment measurement.

품질개선 및 혁신활동에서 재무성과 측정모형의 개발 (Development of Financial Effect Measurement(FEM) Models for Quality Improvement and Innovation Activity)

  • 최성운
    • 대한안전경영과학회지
    • /
    • 제17권1호
    • /
    • pp.337-348
    • /
    • 2015
  • This research introduces the Financial Effect Measurement (FEM) models which measures both the improvement and the innovation performance of Quality Control Circle (QCC) and activities of Six Sigma. Concepts and principle of Comprehensive Income Statement (CIS), Balanced Scorecard (BSC), Time-Driven Activity Based-Costing (TDABC) and Total Productive Maintenance (TPM) are applied in order to develop the 4 FEM models presented in this paper. First of all, FEM using CIS depicts the improvement effects of production capacity and yield using relationships between demand and supply, and line balancing efficiency between bottleneck process and non-bottleneck processes. Secondly, cause-and-effect relation of Key Performance Indicator (KPI) is used to present Critical Success Factor (CSF) effects for QC Story 15 steps of QCC and DMAIC (Define, Measure, Analyze, Improve, and Control) of Six Sigma. The next is FEM model for service management innovation activities that uses TDABC to calculate the time-driven effect for improving the indirect activities according to the cost object. Lastly, FEM model for TPM activities presents the interpretation of improvement effect model of TPM Capital Expenditure (CAPEX) and Operating Expenditure (OPEX) maintenance using profit, cash and Economic Added Value (EVA) as metrics of enterprise values. To better understand and further investigate FEMs, recent cases on National Quality Circle Contest are used to evaluate new financial effect measurement developed in this paper.

FMEA에서 시간을 고려한 기대손실모형에 기초한 위험 평가 (Risk Evaluation Based on the Time Dependent Expected Loss Model in FMEA)

  • 권혁무;홍성훈;이민구
    • 한국안전학회지
    • /
    • 제26권6호
    • /
    • pp.104-110
    • /
    • 2011
  • In FMEA, the risk priority number(RPN) is used for risk evaluation on each failure mode. It is obtained by multiplying three components, i.e., severity, occurrence, and detectability of the corresponding failure mode. Each of the three components are usually determined on the basis of the past experience and technical knowledge. But this approach is not strictly objective in evaluating risk of a given failure mode and thus provide somewhat less scientific measure of risk. Assuming a homogeneous Poisson process for occurrence of the failures and causes, we propose a more scientific approach to evaluation of risk in FMEA. To quantify severity of each failure mode, the mission period is taken into consideration for the system. If the system faces no failure during its mission period, there are no losses. If any failure occurs during its mission period, the losses corresponding to the failure mode incurs. A longer remaining mission period is assumed to incur a larger loss. Detectability of each failure mode is then incorporated into the model assuming an exponential probability law for detection time of each failure cause. Based on the proposed model, an illustrative example and numerical analyses are provided.

건설근로자의 개인적 특성을 고려한 안전교육 개선방향 (Improvement for Safety Education Considering Individual Personality in the Construction Site.)

  • 김은정;김경래;신동우
    • 한국건설관리학회논문집
    • /
    • 제9권3호
    • /
    • pp.175-184
    • /
    • 2008
  • 안전교육은 작업장 위험에 대해 자기 스스로 보호할 수 있는 기본적인 방법이라고 안전교육 전문가들이 언급한 것처럼 안전교육은 재해예방에 별다른 제한 없이 효율적으로 사용될 수 있는 중요한 안전대책이다. 그러나 건설현장에서의 안전교육은 매우 형식에 치우쳐 교육을 위한 교육일 뿐이며 근로자들에게 안전교육 시간은 지루하고 따분한 시간일 뿐이다. 이러한 이유는 자기와 상관없는 교육내용과 개인적 특성을 무시한 일괄교육에서 기인하며 이는 더 이상 근로자의 자발적 참여를 유도하지 못한다. 따라서 건설근로자들의 개인적 특성에 맞는 다양한 안전교육모델 개발이 필요하다. 이에 본 연구는 건설근로자의 개인적 특성에 맞는 안전교육 모델을 구축하는데 필요한 기초자료를 제공하기 위해 선행연구 분석 및 면담조사를 통해 건설근로자들의 대표적인 개인적 특성 요소와 안전교육 요소를 도출하여 각각의 분류체계를 구축하였으며 마지막으로 건설현장의 근로자에 대한 사례적용을 통해 건설 안전교육의 개선방향을 제시하였다.