The paper investigates the ability to learn from an aircraft accident as the opportunities for learning diminish with the decline in the accident rate. A safety compromising case is studied as the processes of aircraft accident intervention and recovery can degrade the ability of an aircraft accident investigation process to enhance aviation safety by revealing accident causation. In the case s...

here have been many methodologies proposed for the risk assessment in the chemical process industries (CPI). Among them, the most notable ones are quantitative risk analysis, probabilistic safety analysis, worst-case methodology for risk assessment and optimal risk analysis. A critical review of these methodologies is available (1). The key points of these methods are: Quantitative risk analysi...

This study identified high-risk locations (hotspots) using geographic information systems (GIS) and spatial analysis. Five years of accident data (2013–2017) for the Lokoja-Abuja-Kaduna highway in Nigeria were used. The concentration analysis was conducted mean center Kernel density estimation method. These further verified Moran’s I statistics (spatial autocorrelation) to determine their clust...

background  & aim: case-crossover  studies are the case-control  version of crossover studies. in these studies, cases and controls are the same subjects. the term crossover is applied for designs that all subjects pass through both treatment (exposure) and placebo (non-exposure) phases. in fact they are  crossover  of  subjects  between  periods  of  exposure  and  non-exposure.  this  design ...

introduction: sleepiness may predispose drivers to road traffic accidents. obstructive sleep apnea syndrome is the most common medical cause of sleepiness. hence increased neck circumference (nc) and obesity are known as obstructive sleep apnea syndrome risk factors. this study was conducted to assess osas role in occurrence of road traffic accidents in sleeping drivers of commercial heavy vehi...