Search results for "River"

Measuring job stress in transportation workers: psychometric properties, convergent validity and reliability of the ERI and JCQ among professional dr…

2021

Abstract Background The accumulated evidence has shown how professional drivers are, in psychosocial terms, among the most vulnerable workforces, and how their crashes (some of them preceded by stressful working conditions) constitute both an occupational and public health concern. However, there is a clear lack of validated tools for measuring stress and other key hazardous issues affecting transport workers, and most of the existing ones, frequently generic, do not fully consider the specific features that properly describe the work environment of professional driving. This study assessed the psychometric properties, convergent validity and consistency of two measures used for researching…

Bidirectional labeling for solving vehicle routing and truck driver scheduling problems

2020

Abstract This paper studies the vehicle routing and truck driver scheduling problem where routes and schedules must comply with hours of service regulations for truck drivers. It presents a backward labeling method for generating feasible schedules and shows how the labels generated with the backward method can be combined with labels generated by a forward labeling method. The bidirectional labeling is embedded into a branch-and-price-and-cut approach and evaluated for hours of service regulations in the United States and the European Union. Computational experiments show that the resulting bidirectional branch-and-price-and-cut approach is significantly faster than unidirectional counterp…

More Than Just “Stressful”? Testing the Mediating Role of Fatigue on the Relationship Between Job Stress and Occupational Crashes of Long-Haul Truck …

2021

Sergio A Useche,1,2 Francisco Alonso,1,2 Boris Cendales,3 Javier Llamazares4 1Faculty of Psychology, University of Valencia, Valencia, Spain; 2DATS (Development and Advising in Traffic Safety) Research Group, INTRAS (Research Institute on Traffic and Road Safety), University of Valencia, Valencia, Spain; 3Faculty of Economic and Administrative Sciences, El Bosque University, Bogotá, Colombia; 4Department of Technology, ESIC Business and Marketing School, Madrid, SpainCorrespondence: Sergio A UsecheDATS, Carrer del Serpis 29, 3rd Floor, Valencia, 46022, SpainTel +34 611317890Email sergio.useche@uv.esIntroduction: Recent evidence consistently highlights the adverse work environment of long-h…

A Framework to Evaluate Autonomic Behaviours for Intelligent Truck Parking

2016

This paper presents a multi-agent platform to evaluate different strategies to manage the negotiated management of parking spaces in road rest areas. The system dynamically adapts itself to the preferences and needs of the drivers of goods about parking requests. The system is shown to be robust to incidents regarding the closure of road rest areas and allows a conversational interaction of new parking requests through an Android based mobile application.

Suspended particulate matter fluxes along with their associated metals, organic matter and carbonates in a coastal Mediterranean area affected by min…

2016

International audience; A study of suspended particulate matter (SPM) fluxes along with their associated metals, organic matter and carbonates, was conducted off the Mejerda River outlet in May 2011 and in March and July 2012 at depths of 10, 20 and 40 m using sediment traps. SPM fluxes are more significant near the Mejerda outlet, especially in winter, but dissipate further offshore. Normalization reveals that the Mejerda is a major source of Pb, Zn, Cd, Cu, Ni, and Co, all of which are the result of human activities. In contrast, Fe, Mn and N are of authigenic origin. The enrichment factor shows that Pb, Zn and especially Cd are the most highly polluting metals off the Mejerda outlet. Thi…

Sediment-flow interactions and effects on bed forms mechanism

2009

Recent experimental works conducted in mobile bed rectilinear flume seem to verify the existence of a correspondence between the spatial periodicity of horizontal turbulent structures evolving in streamwise direction and the wavelength of bed forms (alternate bars) observed on the bed. In this study, the effect of the variation of the bed roughness conditions on the evolution of such horizontal turbulent structures is analyzed. Peculiar results obtained by using flow velocity data collected along the flume both with flat bed and with deformed bed are reported.

¿Tocados por las imágenes?

2020

Carles Salvador i la reivindicació de l'ús social de la llengua catalana

1994

Carles Salvador described himself as «a politician of language». Already at an early age, he staunchly defended the right to speak Catalan in the Valencian Country at every level, beginning in primary school. Pérez i Moragón situates this posture within the Valencian linguistic panorama in an era characterized by the dictatorship of Primo de Rivera, the Second Republic, and the Franco regime.

"Muera el mal gobierno": conflicto jurisdiccional y límites a la política de reformación de Olivares en los virreinatos de Nueva España y Cataluña (1…

2021

Efectos de una crecida en un cauce antropizado. La riada del Palancia de octubre de 2000

2011

[EN] In October of 2000, the Palància River underwent a major flood, which substantially modified the morphology of the river channel. These changes took place on a river bed previously modified by public works aimed at cleaning and simplifying the river section. The flood partially restored the braided morphology, reconstructing bars and channels. Moreover, river incision processes increased, particularly downstream the Palància bridges. This process reveals a sedimentary deficit caused by reservoirs; land use changes and gravel mining. The aim of this work is to describe these processes of change and to analyze the morphosedimentary consequences, through the interpretation of aerial photo…