Computers are quickly taking over safety-critical functions in transportation systems. Not surprisingly, we are starting to experience incidents and accidents related to the software components in these systems, including a recent recall related to ABS failure. Software allows unprecedented complexity and coupling in these systems, and these factors are stretching our current engineering techni...

The identification of a suitable basis of safety to protect, or prevent, against overpressure hazards from gas, vapour or dust explosions and runaway chemical reactions or decompositions is a prerequisite for safe operation. However, the process of successfully realising and implementing the basis of safety is critical to its success. This paper examines the critical phases of selection of the ...

In occupational safety, prevention and protection usually involve the use of some sort of barriers. To estimate accurately safety barriers effectiveness it is of paramount importance to assure its performance and consequently keep the risks on adequate levels. But, what is safety barrier effectiveness? How to estimate it without statistical reliable data? Estimate the effectiveness of safety ba...

This study focused on the public transport risk assessment in District one of ​​Tehran through Fault Tree Analysis involving the three criteria of human, vehicle and road in Haddon matrix. In fact, it examined the factors contributing to the occurrence of road accidents at several urban black spots within District 1. Relying on road safety checklists and survey of experts, this study made an ef...

all societies face the need to make judgments about what interventions (both public health and personal medical) to provide to their populations under reasonable resource constraints. their decisions should be informed by good evidence and arguments from health technology assessment (hta). but if hta restricts itself to evaluations of safety, efficacy, and cost-effectiveness, it risks being vie...

A safety assessment approach for human-machine interfaces (HMI) of Nuclear Power Plant (NPP) instrumentation and control systems (I&Cs) based on the Safety Case methodology is proposed. I&C assessment model is described taking into account human factor impact. Normative profile based on harmonization and standard requirements selection for choice of HMI safety assessment methods is developed. R...

Industrial safety is an important issue in Thailand, and attempts have been made to improve safety performance and accident records. This paper examines key criteria influencing safety improvement. Exploratory factor analysis confirms 9 safety criteria, including 5 "enablers" and 4 "results", with a total of 47 associated attributes. A safety assessment approach is developed, using those 9 key ...

introduction: patient safety culture is an important part of improvement in the safety of health care. knowing its present status is required for development of safety culture. the present study aimed to evaluate the current status of patient safety culture in hospitals of three central provinces of iran. method: the present cross-sectional study was performed in teaching hospitals of tehran, a...