• 대한안전경영과학회지
• /
• 제14권4호
• /
• pp.169-175
• /
• 2012

Self-Inspection is being used in the workplace hazardous, dangerous machinery and equipment to build capacity for the voluntary safety risks due to use of machinery and prevention of industrial accidents that inspect facilities for safety issues, is to check. However, December 31, 2008 as part of Article 36 of the Occupational Safety and Health Act (safety inspection), the financial vanish as the self-test, Safety inspection program has been changed., In each individual workplace that creates its own standards and regulations to use the existing inspection system is in some cases. This study is located in the southeast industrial complex as a risk reducer manufacturer, machine-based target zones in S Corp owns most of the crane based on the results of the tests is to analyze the problem. Then check the results - to bring its measures and information you need to know for sure is to propose.

• 한국기계가공학회지
• /
• 제20권10호
• /
• pp.119-127
• /
• 2021

Small drops in gas cause some problems for downstream equipments such as turbine, compressor and etc. In some cases, we are obliged to remove hazardous liquid mist from gas. In order to remove water or other liquids from the gas, there are some equipments like mesh mist eliminator and vane-plate mist eliminator. oil mist filter is a kind of liquid eliminator equipments used to remove the liquid with 1-10um droplet diameter from the gas. In this paper is determine the factors affecting the oil mist filter efficiency using CFD. length and angle of the filter were considered and the results and compare the results of the efficiency tests, showed error of less than 3%. optimum filter can remove more than 87.3% between 1 and 10um of oil mist.

• 전자통신동향분석
• /
• 제34권1호
• /
• pp.111-122
• /
• 2019

As society develops, the demand for safety and security services increases. Developed nations such as the United States use advanced technology to lower crime rate and promote intelligent security services. First, this article examines intelligent systems that are used for monitoring and detecting crimes and dangerous situations. Recently, we have been studying technologies that enable preemptive responses through prediction of crime and hazardous situations. In this paper, we examine the cases of security services based on a crime/risk prediction model and explain the structure and major technologies of an intelligent security system. In addition, we propose a direction for technological development for achieving future security services.

• 한국가시화정보학회지
• /
• 제17권1호
• /
• pp.19-25
• /
• 2019

We report a study on the dynamics of the transport of a capsule immersed in a vertical pipe. Techniques to convey objects through liquid flow pipes using a hydraulic mean are used to transport sludge and hazardous materials. For the better understanding of the techniques, we developed a theoretical model to predict the transport speed of a cylindrical capsule in a vertical pipe. The comparison of the model prediction with the experiments shows that our model using the lubrication approximation precisely describes the experimental observations in cases where the gap between the capsule and pipe wall is sufficiently small. Our study suggests parameters to control the falling speed and thus enable an accurate control of the capsule speed in hydraulic transport systems.

• 국제학술발표논문집
• /
• The 2th International Conference on Construction Engineering and Project Management
• /
• pp.327-336
• /
• 2007

Construction activities are characterized as hazardous work. Therefore, it is very imperative to explore comprehensively fatal accidents and safety performance in both developed and developing countries. The goal of this study was to look at the reasons behind fatal accidents in HCMC, Vietnam's largest city. The survey sample consists of 91 fatal accident cases in total that occurred in construction sites during the years 1996-2005 and were reported to the Department of Labor-Invalids-Social Affairs in HCMC. The study was conducted by means of field surveys with relevant individuals working in construction sites and statistical analyses. The research resulted in failing to wear/use PPE as unsafe acts and in poor safety management procedures/methods in sites as insecurely working conditions behind serious accidents in the construction. The paper stresses that accidents tended to occur more in state-owned companies than in others and involved more with masonry/welding people and workers without labor contracts than with other workers.

• 한국건축시공학회:학술대회논문집
• /
• 한국건축시공학회 2021년도 봄 학술논문 발표대회
• /
• pp.297-298
• /
• 2021

The construction industry is a representative high levels of hazardous work environment, and the number of disasters in the construction industry is the highest compared to other industries. Information & Communication Technology(ICT) convergence technologies are being introduced worldwide, and this study considers ICT-based safety management cases at domestic and foreign, resulting in a list of technologies to recognize and resolve to construction site hazards. Technologies such as 「Development of hazard map considering cause, age, proficiency, type and timing of accident in construction industry」, 「Development of hazard map-based accident prediction platform using AI」, 「Development of smart safety management plan for whole construction work cycle」, 「Development of intelligent safety devices and smart safety equipment for mitigating hazard factors」 were derived as smart construction technologies that could solve this problem.

• 한국환경보건학회지
• /
• 제44권3호
• /
• pp.283-292
• /
• 2018

Objectives: This study was conducted to identify hazardous factors that reflect the characteristics of the academy and to provide basic data of environmental safety standard. Methods: Heavy metals, volatile organic compounds, formaldehyde, pesticides and phthalates were measured in 20 academies, which were supplementary, music, art and physical education institutes. Results: In case of heavy metals, the 12 locations were detected for lead (Pb) over the standard value, and 15 locations were exceeded for the total heavy metal. In six locations, the concentrations of volatile organic compounds were exceeded the standard value of $400{\mu}g/m^3$, and two locations for formaldehyde were exceeded the standard value of $100{\mu}g/m^3$. The most commonly detected agents in the air dust were chlorpyrifos and diazinon. The concentrations of DEHP, DINP, and DBP were detected and exceeded in several academies, The risk assessment results showed that HCHO as carcinogen had a safety level of 10-7 to 10-6, and DEHP and DINP as non-carcinogens had a safety level as assessed to be under than 0.1. Conclusions: Through the investigation of long-term environmental and health effects related laws on academies, indoor air quality management might be needed because there were cases of exceeding standard.

• 한국환경보건학회지
• /
• 제41권1호
• /
• pp.1-10
• /
• 2015

Objectives: The purpose of this study was to propose an indirect exposure assessment method using a questionnaire survey at a time when direct exposure assessment would be impossible after a chemical accident. Methods: About two weeks after an accident, a questionnaire survey was performed with 1,264 persons from the local community. Variables related to exposure were extracted from the survey contents, weighted and then graded for comparison with subjective symptoms in order to evaluate the extent of exposure. Survey items suitable for reflecting the previous exposure level during the accident were extracted, weighted and divided into quartile ranges. Subjective symptoms showed an increasing tendency with higher exposure level when compared with final exposure level (p<0.01). Results: For the relationship between the final exposure grade and subjective symptoms, as the exposure grade was increasing the rates complaining of symptom also showed an increasing tendency. However, when adjusted for demographic characteristics, there was a tendency for the eye irritation symptom to appear higher in women, and respiratory organ irritation appeared higher in smokers. Conclusions: When the problem of recall bias is considered, this study may not have completely unraveled exposure and the characteristics of the participants can affect subjective symptoms. Nevertheless, the exposure rating method of using a questionnaire showed a significant relationship with symptom level. It can be deemed that assessment of past exposure may be successfully evaluated by questionnaire in cases such as chemical accidents.

• 한국식품위생안전성학회지
• /
• 제29권1호
• /
• pp.21-25
• /
• 2014

멜라민수지 조리기구 제조에 사용되는 formaldehyde와 phenol의 경우 식품에 이행될 우려가 있다. 이에 본 연구에서는 국내에서 유통되고 있는 멜라민수지 조리기구 222건에 대하여 formaldehyde와 phenol의 식품유사용매로의 이행량을 조사하였다. 멜라민수지 조리기구는 컵(14), 공기(75), 접시(85), 숟가락(10), 젓가락(4), 식판(8), 주걱(4), 뒤지게(9) 및 국자(12)등을 수거하였다. 식품유사용매로는 물, 4% 초산, 20% 에탄올, n-헵탄을 사용하였다. 한국의 멜라민수지 기구 및 용기 포장 중 formaldehyde와 phenol의 용출기준은 각각 4 mg/L, 5 mg/L 이며, 수거된 222건 멜라민수지 조리기구 모두 기준 규격에 적합하였다. 멜라민수지 조리기구 중 formaldehyde와 phenol의 이행량은 각각 $N.D{\sim}2,949{\mu}g/L$, $N.D{\sim}78{\mu}g/L$이었다. 위 분석결과는 멜라민수지 기구 및 용기 포장의 안전관리의 과학적 근거자료로 제공될 수 있을 것으로 판단된다.

• 한국컴퓨터정보학회논문지
• /
• 제25권9호
• /
• pp.143-150
• /
• 2020

본 연구는 다중위해사례를 중심으로 경호임무수행 간 출입통제 활동을 실시하는 과정에서 유발되는 경호원의 휴먼에러가 무엇인지 규명하고 그에 따른 대책을 제시하는데 목적이 있다. 이를 검증하고자 사건의 순서를 시계열로 배열한 뒤 변동노드를 중심으로 문제점을 파악할 수 있는 'VTA 기법'과 'Why-Why 분석 기법'을 활용하였으며, 추가적으로 'M-SHEL Matrix'를 통하여 휴먼에러를 유발하는 환경요인과 개인요인을 추출하였다. 분석결과, 출입통제 사고를 유발하는 경호환경요인으로는 시간부족(조급함), 방문자에 대한 편견, 편중된 근무방법, 보안 관리미흡, 무사안일주의, 익숙한 분위기(긴장이완), 형식적인 근무활동, 편의제공, 과소평가 등으로 조사되었다. 그리고 경호원 개인적 측면에서 유발되는 휴먼에러는 낮은 경계의식, 형식적인 근무, 검측소홀, 안일한 대처 등으로 조사되었다.