• 한국건축시공학회지
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• 제13권2호
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• pp.169-180
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• 2013

본 논문은 건설현장에서 사고의 주체인 근로자의 개인적 특성과 안전행동에 대한 인과관계 규명 및 직 간접적인 영향력을 분석하는 것에 목적이 있다. 이를 위해 선행연구를 통해 개인적 특성 관련 변인들을 선출하고 '개인적 특성-안전행동'에 대한 이론 모형을 구안하였다. 모형 검증을 위해 대구 경북 건설현장의 근로자 399명을 대상으로 설문조사를 실행하고, SPSS 18.0과 AMOS 18.0을 활용하여 탐색적 요인분석, 신뢰도분석, 구조분석을 실시하였다. 직 간접효과를 분석하기 위해 적합도 지수와 매개효과 검증을 실시하였다. 본 연구의 결과는 개인성격 중 '성실성'과 '개방성 및 외향성'이 안전행동에 직접적인 영향을 미치면서 동시에 '스트레스반응', '안전동기', '안전지식'을 매개로 안전행동에 간접적인 영향을 미친다는 것을 확인하였다.

• 한국건설관리학회논문집
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• 제24권6호
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• pp.81-90
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• 2023

Climate change has resulted in increased frequency and intensity of heat waves, which poses a significant threat to the health and safety of construction workers, particularly those engaged in labor-intensive and heat-stress vulnerable working environments. To address this challenge, this study aimed to propose an interpretable machine learning approach for forecasting personal heat strain by considering the cumulative effect of heat exposure as a situational variable, which has not been taken into account in the existing approach. As a result, the proposed model, which incorporated the cumulative working time along with environmental and personal variables, was found to have superior forecast performance and explanatory power. Specifically, the proposed Multi-Layer Perceptron (MLP) model achieved a Mean Absolute Error (MAE) of 0.034 (℃) and an R-squared of 99.3% (0.933). Feature importance analysis revealed that the cumulative working time, as a situational variable, had the most significant impact on personal heat strain. These findings highlight the importance of systematic management of personal heat strain at construction sites by comprehensively considering the cumulative working time as a situational variable as well as environmental and personal variables. This study provided a valuable contribution to the construction industry by offering a reliable and accurate heat strain forecasting model, enhancing the health and safety of construction workers.

• International Journal of Advanced Culture Technology
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• 제10권1호
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• pp.302-309
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• 2022

Occupational safety accidents are caused by various factors, and it is difficult to predict when and why they occur, and it is directly related to the lives of workers, so the interest in safety accidents is increasing every year. Therefore, in order to reduce safety accidents at industrial fields, workers are required to wear personal protective equipment. In this paper, we proposes a method to automatically check whether workers are wearing safety helmets among the protective equipment in the industrial field. It detects whether or not the helmet is worn using YOLOv5, a computer vision-based deep learning object detection algorithm. We transfer learning the s model among Yolov5 models with different learning rates and epochs, evaluate the performance, and select the optimal model. The selected model showed a performance of 0.959 mAP.

• 디지털융복합연구
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• 제14권3호
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• pp.373-379
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• 2016

국내에서 주 5일제 근무가 시행되어 많은 사람들이 주말을 즐기기 위해 취미활동이나 레저활동 혹은 캠핑 등에 관심이 집중되고 있다. 또한 최근 출퇴근을 위한 퍼스널 모빌리티 제품도 샤오미를 통한 가격 인하 제품의 출시로 직장인들에게 많이 판매되고 있다. 이러한 시점에서 본 연구는 레저활동이나 혹은 퍼스널 모빌리티 제품 사용에 있어서의 안전을 위한 자이로스코프 센서를 이용한 방향지시등의 개발을 목적으로 하고 있다. 현재 레저활동이나 퍼스널 모빌리티 제품의 안전을 위한 방향지시등의 제작 사례와 문제점등을 알아 보고 그것을 보완할 수 있는 사용자의 안전을 위한 방향지시등 개발을 개발하였다. 그모양은 원형의 링으로 LED를 사용하여 사용자의 움직임 방향을 후측방에 지시할 수 있다. 이러한 연구는 퍼스널모빌리티 제품을 사용하는 사용자를 위한 하나의 해결책이 될 수있다.

• 한국산업보건학회지
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• 제33권2호
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• pp.156-170
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• 2023

Objectives: This study conducted practical training to improve the proper usage of personal protective equipment(PPE), which greatly impacts workplace safety and health management. Personal protective equipment education was conducted through active participation, without theoretical modules, and aimed to identify the effects of repeated practical education and determine ways to increase participant satisfaction. Methods: Study data were analyzed using the IBM SPSS Statistics ver.29 software. First, participants' general characteristics were analyzed with frequency analysis. Second, the normality and equality of variances (Leven's test) were tested for the dependent variables prior to statistical analyses to determine the use of parametric tests. In general, normality is assumed when the sample size is 30 or more per the central limit theorem (Park et al., 2014). As our sample size of health management workers was 43, normality can be assumed. However, to ensure rigor of the study, we examined skewness and kurtosis. The results confirmed that the data were normally distributed. Third, the effects of repeated PPE training were analyzed using paired t-tests. Fourth, differences in satisfaction with PPE training according to the safety and health job position and safety and health certification were analyzed with t-test and Welch's t-test. For parameters that did not meet the assumption of equal variances, the Welch's t-test was performed. Results: Repeated PPE training improved the educational outcomes, and the improvements were significant in the 1st and 2nd respiratory PPE and safety and hygiene PPE training evaluations (p<.001). In terms of safety and health job position, repeated training led to improvements in educational outcomes, with significant improvements observed among supervisors and specialized health management institution workers in the 1st and 2nd training evaluations (p<.005). In terms of safety certification, repeated training led to improvements in educational outcomes, with significant improvements observed among both certified and non-certified individuals (p<.005). Regarding satisfaction with PPE training according to safety and health job positions, specialized health management institution workers showed greater satisfaction than supervisors, with significant differences in the satisfaction for expertise of lecture, work relevance, and lecturer's attitude (p<.001). Regarding satisfaction with PPE training according to safety and health certification, satisfaction was higher among certified individuals, with significant differences in satisfaction for work relevance and lecture attitude (p<.05) Conclusions: PPE education should be recommended to be provided as practical training. Repeated training can enhance educational outcomes for individuals with inadequate knowledge and understanding of PPE prior to education. For individuals with high levels of pre-existing knowledge and understanding of PPE, the results show that various training experiences should be provided to enhance their satisfaction. Therefore, it suggests that the workplace should actively seek educational media and methods to acquire expertise and skills in wearing personal protective equipment and improve the ability to use

• 한국안전학회지
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• 제31권5호
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• pp.89-94
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• 2016

The objective of this study was to estimate the dynamic behavior of a personal rapid transit(PRT) track system using a rail of rectangular tube section and a rail joint of sliding type, and to compare the results with the normal rail and rail joint of a PRT track system by performing field measurements using actual vehicles running along the service lines. The measured vertical displacement of rail and sleeper, and vertical acceleration of rail for the normal rail and rail joint section were found to be similar, and the rail joint of sliding type satisfied the design specifications of the track impact factor for a conventional railway track. The experimental results showed that the overall dynamic response of the rail joint were found to be similar to or less than that of the normal rail, therefore the rail joint of sliding type for PRT track system was sufficient to ensure a stability and safety of PRT track system.

• Asian Journal for Public Opinion Research
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• 제8권3호
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• pp.222-245
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• 2020

In the pandemic crisis, many governments implemented harsh interventions that might contradict democratic values and civil liberties. In Taiwan, the debate over whether or not to reveal personal information of infected persons to limit the coronavirus's spread poses the democratic dilemma between public health and civil liberties. This study examines whether and explains how Taiwan's people respond to the choice between individual privacy and collective security. We used survey data gathered in May 2020 to show that, first, the democratic values did not deter the pursuit of collective safety at the cost of civil liberty; rather, people with higher social trust were more likely to give up their civil liberties in exchange for public safety. Second, people who support democratic values and pursue collective security tend to avoid violating privacy by opposing the release of personal information. This study proves that democratic values do not necessarily threaten collective safety and that the pursuit of common good can co-exist with personal privacy.

• 한국안전학회지
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• 제21권5호
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• pp.60-71
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• 2006

In recent years, the most safety studies have been focused on identifying the relationship between safety climate and safe work behavior in accordance with the awareness that prime causes of accidents are organizational, managerial, and human factors rather than pure technical failures across the world. This study focused empirical research aimed at finding out the safety climate factors and examining the relationships of the safety climate and safe work behavior in construction site in Korea, too. A 10 numbers of safety climate factors were adapted from the Mohamed's study(2002) and tested using PLS-GRAPH 3.0 expecting same results as Mohamed' study. And then the relationship between safety climate and safe work behavior was examined. Only two safety climate factors-personal risk appreciation and worker's safety competence-were found and a strong positive relationship between safety climate and safe work behavior was identified in this study. Discussed in details about the results and implications and suggested further studies.

• 해양환경안전학회지
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• 제1권1호
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• pp.63-82
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• 1995

In recent years, through the rapid development in personal computer technology, it has become possible to make a radar simulator based on the personal computer. The advantage of the personal Computer aidd radar simulator lies in its cost effectiveness, when comparing with that using the real radar. Although there have been studies carried out to develop radar simulator using PC and the products of thi kind is in the commercial market already, they are all using the mockup of the real radar, and therefore, the price of the simulator is still rather expensive. In this respect, this thesis aims to develop a ARPA radar simulator which is running on the sole PC, so that the students of the maritime educational institution may get ARPA radar training easily and cheaply. The simulator developed in this thesis using Visual Basic is found to run successfully on the 486PC, and it is expected that this new simulator system designed first time in Korea would be used as an easily accessible ARPA radar training equipment.

• 대한안전경영과학회지
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• 제16권3호
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• pp.433-441
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• 2014

Increasing the outsourcing of personal information treatment, the safe management and director for fiduciary is very important. In this paper, under the personal information protection management systems the current situation of fiduciary management and direction was reviewed and the certification system was analysed in terms of availability of the controled items. Under the basis of legal compliance at the time of the Privacy Act, the characteristics of outsourcing type was also analyzed and derived new controled items. As a result of the proposed research, new controled items for fiduciary could be used as a standard for the managing Director.