Road transport has become by far the major source of environmental pollution and traffic congestion in urban areas. Though a lot of research has been done to investigate the functional relationship linking air quality and air pollution from transport, a further improvement in the knowing of this relationship is needed. The aim of this study was to analyze this relationship and to develop a more...

This paper analyses the scientific study on airport efficiency in WoS (Web of Science) database for period 2000–2019. Productivity indicators have been obtained by author, years, journals, and institutions, an analysis visibility, impact, collaboration through co-citations was performed. The areas greatest application are transport, engineering, economics. reveals existence three research lines...

7 The effects of entrained air on microstructure and transport properties of concrete with up to 11.5% air at different w/c 8 ratios, curing and conditioning regimes were investigated. It was found that air voids disrupt the packing of cement and 9 increase the heterogeneity of the microstructure. The width of the affected interface is around 30 μm. Gaseous 10 diffusivity and permeability are i...

in this paper, we propose a sensitivity analysis for evaluating the effectiveness of recovery solutions in the case of disturbed rail operations. indeed, when failures or breakdowns occur during daily service, new strategies have to be implemented so as to react appropriately and re-establish ordinary conditions as rapidly as possible. in this context, the use of rail simulation is vital: for e...

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...

This study presents the application of multi-criteria evaluation in the selection of an optimal configuration for an Air Quality Model. The simulation domains focus on the Mexico City Metropolitan Area. A set of 10 different configurations were considered as alternatives. These configurations included convective parameterization, 6th order diffusion and exclusion of data assimilation within the...

The air transport sector has never been consistently profitable. Further the true nature of the air transport market has long been hidden beneath a maze of regulations and controls. These have to some extent been gradually relaxed in many markets over the past twenty years, at least as far as operations are concerned. Fixed infrastructure, however, remains heavily regulated. There still remains...

Background: This study investigated the accidents recorded at the Gonabad Hospital Management Center for Hospital Management from 2014 to 2016, and identified important causes or parameters that influenced the incidence of accidents using the Pareto chart. Materials and Methods: This descriptive and analytic study examined 25,414 incidents recorded at the Gonabad Hospital Management Center. Th...