Highway work zones interrupt regular traffic flows and create safety problems. Improving safety without sacrificing the main function of highways is a challenging task that traffic engineers and researchers have to confront. In this study, the concept of using crash severity index (CSI) for work zone safety evaluation was proposed and a set of CSI models were developed through the modeling of w...

| We consider a urban ber-optic microcellular environment in which a cigar-shaped cell consists of several microzones with their own antenna sites connected to a central station through optical bers. To increase the ef-ciency of radio resources and to reduce unnecessary hand-oo calls between microzones, we propose a movable safety zone scheme in which each communicating user has his own safety ...

To protect passengers, large aircraft are equipped with multiple mechanisms to absorb impact energy during a crash. However, light aircraft rely only on the cabin structure to withstand the compression and energy generated during a crash. This study performed a topology optimization analysis on the model structure by using Abaqus/optimization and used strain energy as the objective function and...

It is well recognised that plant vegetation and roots are capable of improving the shear strength hillslopes by reinforcing soil resistance. Several key factors influencing level slope reinforcement include root geometry, orientation strength. To assess mechanical performance vegetated slopes using numerical methods, structures can be represented beam pile elements to mirror behaviour. In contr...

Objective: This study aims to develop and create a tool based on factor analysis to assess safety culture in the processing industry. Methods: This study was conducted in the petrochemical industry in 2021. The questionnaires were distributed among 312 employees, supervisors, and managers, and 308 of them were completed. The validity of the questionnaire was assessed by content and construct v...

We employed a Mohr-Coulomb safety factor equation to assess the response of ice-cemented slopes in the stable upland zone of the McMurdo Dry Valleys (MDV) to artificial increases in mean summertime soil surface temperatures (MSSST). Results show that ice-rich, silty tills on slopes 20° could fail by planar sliding with an increase in MSSST of ~5o to 9oC. This change corresponds to an atmospheri...

Recently, we presented a steady-state analytical hillslope stability model to study rain-induced shallow landslides. This model is based on kinematic wave dynamics of saturated subsurface storage and the infinite slope stability assumption. Here we apply the model to investigate the effect of neglecting the unsaturated storage on the assessment of slope stability in the steady-state hydrology. ...

Elaboration of an instrumental reaction involving conditioned rearrangement of innate motor coordination takes a long time to attain in dogs. Particular difficulties are encountered in the execution of conditioned movement when painful stimulation evokes an inborn response opposite to the conditioned one. Exclusion of visual control of performance selectively impairs the phase of searching for ...