• Safety and Health at Work
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• v.15 no.2
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• pp.220-227
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• 2024

Background: Though the artificial neural network (ANN) technique has been used to predict noise-induced hearing loss (NIHL), the established prediction models have primarily relied on cross-sectional datasets, and hence, they may not comprehensively capture the chronic nature of NIHL as a disease linked to long-term noise exposure among workers. Methods: A comprehensive dataset was utilized, encompassing eight-year longitudinal personal hearing threshold levels (HTLs) as well as information on seven personal variables and two environmental variables to establish NIHL predicting models through the ANN technique. Three subdatasets were extracted from the afirementioned comprehensive dataset to assess the advantages of the present study in NIHL predictions. Results: The dataset was gathered from 170 workers employed in a steel-making industry, with a median cumulative noise exposure and HTL of 88.40 dBA-year and 19.58 dB, respectively. Utilizing the longitudinal dataset demonstrated superior prediction capabilities compared to cross-sectional datasets. Incorporating the more comprehensive dataset led to improved NIHL predictions, particularly when considering variables such as noise pattern and use of personal protective equipment. Despite fluctuations observed in the measured HTLs, the ANN predicting models consistently revealed a discernible trend. Conclusions: A consistent correlation was observed between the measured HTLs and the results obtained from the predicting models. However, it is essential to exercise caution when utilizing the model-predicted NIHLs for individual workers due to inherent personal fluctuations in HTLs. Nonetheless, these ANN models can serve as a valuable reference for the industry in effectively managing its hearing conservation program.

• International Journal of Highway Engineering
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• v.15 no.4
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• pp.135-146
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• 2013

PURPOSES : This study aimed to analyze the impact the operation of pre-signals at 4-leg signalized intersections and present primary environmental factors of roads that need to be considered in the installation of pre-signals. METHODS : Shift of proportions safety effectiveness evaluation method which assesses shifts in proportions of target collision types to determine safety effectiveness was applied to analyze traffic crash by types. Also, Empirical Bayes before/after safety effectiveness evaluation method was adapted to analyze the impact pre-signal installation. Negative binomial regression was conducted to determine SPF(safety performance function). RESULTS : Pre-signals are effective in reducing the number of head on, right angle and sideswipe collisions and both the total number of personal injury crashes and severe crashes. Also, it is deemed that each factor used as an independent variable for the SPF model has strong correlation with the total number of personal injury crashes and severe crashes, and impacts general traffic crashes as a whole. CONCLUSIONS: This study suggests the following should be considered in pre-signal installation on intersections. 1) U-turns allowed in the front and rear 2) A high number of roads that connect to the intersection 3) Many right-turn traffic flows 4) Crosswalks installed in the front and rear 5) Insufficient left-turn lanes compared to left-turn traffic flows or no left-turn-only lane.

• Journal of the Korea Safety Management & Science
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• v.25 no.4
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• pp.25-33
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• 2023

This study analyzed the factors affecting the effectiveness of the Chemical Hazard Risk Management (CHARM). A survey was conducted on 104 learners who participated in the Risk Assessment training course at Occupational Safety and Health Training Institute. Through a self-administered questionnaire, the effect of personal characteristics, corporate characteristics, and safety and health level of the company on the effectiveness of chemical risk assessment was investigated. As a result of statistical analysis, the safety and health level of the company had a positive (+) effect on the effectiveness of Chemical Hazard Risk Management(CHARM), but personal characteristics and corporate characteristics had no relation to it. This study can be used as basic data for further research related to chemical risk assessment in workplaces.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2023.05a
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• pp.173-174
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• 2023

In this paper, we introduce a model for detecting Personal Protective Equipment (PPE) using YOLO (You Only Look Once), an object detection neural network. PPE is used to maintain a safe working environment, and proper use of PPE protects workers' safety and health. However, failure to wear PPE or wearing it improperly can cause serious safety issues. Therefore, a PPE detection system is crucial in industrial settings.

• Journal of the Korean Society of Hazard Mitigation
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• v.10 no.6
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• pp.65-71
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• 2010

The aim of the study intends to investigate wearing practice of personal protective equipment for firefighter in gyeongnam province and to provide the base data for the safety and health of firefighter. The results of the study are as follows. The overall reliability of fire personal protection equipment has been investigated by 3.19 and an overall improvement in the personal protective equipment is needed. Firefighter showed such a low satisfaction leather fire boots(2.68), glove(2.67) and rubber fire boots(2.59) in personal protective equipment and rubber fire boots(2.75), glove(2.77) and leather fire boots(2.97) has been investigated by the state of the poor. For personal protective equipment, firefighters have been experiencing many difficulties on the fit and weight. To overcome this problem, it is necessary to be designed ergonomically and to develop high-performance, lightweight materials.

• Journal of The Korean Association of Information Education
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• v.8 no.4
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• pp.489-500
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• 2004

In this paper, an investigation on internet safety of 244 national or public elementary schools' web sites was performed with two points of view : inappropriate material posting and personal information exposure. The investigation results showed that obscene materials and commercial advertisements were uploaded into the bulletin board(67.2%) and students' personal information such as photograph, address, telephone number were exposed(87.3%). Most of the inappropriate materials were posted by auto-register programs. This problem was occurred due to reckless bulletin board opening and inappropriate management. On the contrary, personal information was exposed by teachers and students. They didn't not care about their personal information. It shows the fact that they have not recognized the danger of personal information exposure. Therefore managing real-name membership and enforcing permission to bulletin board were required to construct and use a safe school web site. Teachers have to understand not only negative effects appeared in a school web site but also latent dangerous factors.

• Convergence Security Journal
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• v.23 no.1
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• pp.35-43
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• 2023

Since the Personal Information Protection Act was enacted in 2011, it has played a role in safely protecting people's personal information and protecting their rights. Personal information controller must comply with the duty of safeguards for safe personal information management. Even though administrative regulation is an accompanying issue, it is not clear to whom, when and how it applies. According to the imposition of duties, the scope, standards, safety measures, procedures, etc. for the target person should be clearly and specifically specified, but the current legal system is insufficient .In this study, problems and reasonable improvement plans were presented for the classification criteria for applicable subjects, the criteria for the criteria for determining the targets, and the criteria for measures to ensure safety. Through this, we intend to contribute to enhancing the effectiveness of the system by presenting reasonable measures by clarifying and specifying the scope and standards of application.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.22 no.6
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• pp.92-101
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• 2023

The increasing use of personal mobility has led to a rise in traffic accidents and social issues. Consequently, the government is continually revising laws and regulations to address the problems associated with personal mobility. This study conducted a survey that reflects user characteristics and public perceptions based on the law revised in May 2021. The personal characteristics, legal awareness, usage patterns, risk characteristics, and risk factors were analyzed. The analysis indicated that driving on roads without separate sidewalks, speeding, and carrying passengers are hazardous practices. Moreover, Poor awareness of the legal framework governing personal mobility results in law violations. These results are significant as they highlight the need for policy measures regarding institutional and legal improvements, and they underscore the importance of enhancing social awareness about safety as personal mobility become more widespread.

• Journal of the Korean Society of Safety
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• v.5 no.1
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• pp.67-76
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• 1990

This research was to describe the organizational safety climate, to examine its implication, and to improve the strategies of industrial accident prevention in chemical industry in Korea. The subjects were 207 directors of department of safety in chemical industry, asked to respond questionnaire sent by mailing. The data in this research were analyzed by SPSS PC＋. The results were as follows ： 1) 24.2％ of surveyed chemical industry had department of safety. 2) 53.6％ of suueyed chemical industry had safety education program. 3) 53％ of employees in surveyed chemical industry were satisfied with supply of personal protective equipments.

• Safety and Health at Work
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• v.15 no.3
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• pp.292-299
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• 2024

Background: The aim of this research is to analyze the transformation of workers perceptions of the safety climate in an oil and gas company in Indonesia when they experience a change in ownership from a multinational to a national company. Methods: This cross-sectional study used questionnaires distributed offline and online in three periods of ownership of Company X. Data analysis was carried out descriptively by comparing workers perception scores regarding the safety climate at Company X when managed by the multinational holder, transition period, and national holder. Results: Workers perceptions of the safety climate in Company X when it experienced a change in ownership from a multinational company to a national company has a trend of decreasing scores (from 8.07 to 7.48). Overall, a decreasing trend in scores occurred in several sub-variables of safety climate, namely management commitment (8.33 to 7.56), communication (8.10 to 7.64), safety priority (8.55 to 7.68), personal appreciation of risk (8.25 to 5.48), involvement (7.50 to 7.36), and personal priority and need for safety (8.25 to 5.48). Conclusions: Ownership changes cause a trend of decrease in employee perceptions of the safety climate at Company X. Company's priority on safety related to production target factors is decreasing due to the change of ownership. On the other hand, the national period had a higher score in supportive environments and work environments, compared to the multinational period.