밀폐공간을 포함한 폐쇄공간에서 발생하는 반사음·잔향과 방진마스크·귀마개 착용은 음 성 명료도와 위험신호 인지를 제약할 수 있음에도, 국내 산업안전 연구는 화학적·절차적 위험요인에만 관리가 집중되고 있다. 이에 본 연구는 폐쇄공간을 출입이 제한되고 반사 음·잔향이 두드러지며, 적정한 공기가 유지되는 작업공간으로 조작 정의한 후, 자극-유기 체-반응(SOR) 모형에 기반하여 음향·보호구 복합 자극이 심리 부담을 매개로 안전행동에 이르는 구조적 경로를 실증적으로 규명하고자 하였다. 조선·해양, 석유화학, 상·하수도, 발전, 제조업 등에서 근무하는 작업자 235명이 자기기입식 설문에 응답한 자료를 SPSS 29.0 (IBM Corp.)과 PROCESS Macro (Version 4.1, Model 4)로 분석하였다. 분석 결과, 음향·보호구 복합 자극(S)은 심리 부담(O)을 거쳐 안전행동(R)에 이르는 경로가 통계적으 로 유의하였고(β = .799; β = .460), 자극이 안전행동에 미치는 직접효과 또한 유의하였다 (β = .331). 부트스트랩 5,000회 재표본표출로 추정된 간접효과는 ab = .367 (95% BCa CI [.246, .491])로 유의하여, 자극-안전행동 관계에서 심리 부담의 부분매개효과가 확인되 었다. 또한 총효과 중 간접경로와 직접경로가 각각 52.6%와 47.4%로 공존하는 이중경로 구조가 관찰되었으며, 안전행동 하위차원별로 차별적 경로 양상(Rc 간접전담, Rv 직접우 세 β = .62, Rcp 직접전담)이 나타났다. 응답자의 97.0%는 폐쇄공간 내 의사소통 환경의 개선 필요성에 동의하였다. 이상의 결과는 폐쇄공간 안전관리가 음향환경 개선과 작업자 의 심리 부담 완화도 병행하여 재설계될 필요가 있음을 시사한다.

PURPOSES : Driving simulations are widely used for safety assessment because they can minimize the time and cost associated with collecting driving behavior data compared to real-world road environments. Simulator-based driving behavior data do not necessarily represent the actual driving behavior data. An evaluation must be performed to determine whether driving simulations accurately reflect road safety conditions. The main objective of this study was to establish a methodology for assessing whether simulation-based driving behavior data represent real-world safety characteristics. METHODS : A 500-m spatial window size and a 100-m moving size were used to aggregate and match the driving behavior indicators and crash data. A correlation analysis was performed to identify statistically significant indicators among the various evaluation metrics correlated with crash frequency on the road. A set of driving behavior evaluation indicators highly correlated with crash frequency was used as inputs for the negative binomial and decision tree models. Negative binomial model results revealed the indicators used to estimate the number of predicted crashes. The decision-tree model results prioritized the driving behavior indicators used to classify high-risk road segments. RESULTS : The indicators derived from the negative binomial model analysis were the standard deviation of the peak-to-peak jerk and the time-varying volatility of the yaw rate. Their importance was ranked first and fifth, respectively, using the proposed decision tree model. Each indicator has a significant importance among all indicators, suggesting that certain indicators can accurately reflect actual road safety. CONCLUSIONS : The proposed indicators are expected to enhance the reliability of driving-simulator-based road safety evaluations.

Despite over eighty percent of industrial accidents were caused by unsafe behaviors, most safety programs still focus on changing workers’ internal status such as thinking and attitude rather than directly changing safe related behaviors. The purpose of this paper is to introduce the basic concepts and procedures of Behavior-Based Safety (BBS) which originated in applied behavior science (ABS), BBS attempts to change safety related behaviors by manipulating antecedents and consequences of workers’ behaviors. Also this paper introduces several case studies conducted globally in various industrial fields. These case studies highlight the procedures of BBS, their impacts on safety performance and accidents rate, and other business results. Based on these results, this paper proposes new guidelines for safety management.

  In this paper, we described the existing methodology of product safety analysis and proposed a Petri-nets based method to analyze product safety systematically. The proposed method can be used to find the defects of hardware/software and the error of hu

Load test is performed to obtain the data to evaluate load carrying capacity and check static & dynamic characteristics of a structure by estimating the real behavior of bridge due to loading the load. The subject facility in this paper is a bridge located on the spiilway of dam and traffic is relatively less than most brige. Considering the age and operation rules of a dam, however, load test and structure programming analysis were performed to check current conditions for structure under in-depth inspection and the results of that analysis are shown.