Search results for "Safety Research"

Special Section on Fractional Operators in the Analysis of Mechanical Systems Under Stochastic Agencies

2017

Approximate analytical mean-square response of an impacting stochastic system oscillator with fractional damping

2017

The paper deals with the stochastic dynamics of a vibroimpact single-degree-of-freedom system under a Gaussian white noise. The system is assumed to have a hard type impact against a one-sided motionless barrier, located at the system's equilibrium. The system is endowed with a fractional derivative element. An analytical expression for the system's mean squared response amplitude is presented and compared with the results of numerical simulations.

Stochastic Analysis of a Nonlocal Fractional Viscoelastic Bar Forced by Gaussian White Noise

2017

Recently, a displacement-based nonlocal bar model has been developed. The model is based on the assumption that nonlocal forces can be modeled as viscoelastic (VE) long-range interactions mutually exerted by nonadjacent bar segments due to their relative motion; the classical local stress resultants are also present in the model. A finite element (FE) formulation with closed-form expressions of the elastic and viscoelastic matrices has also been obtained. Specifically, Caputo's fractional derivative has been used in order to model viscoelastic long-range interaction. The static and quasi-static response has been already investigated. This work investigates the stochastic response of the non…

Philip Keefer and Norman Loayza (Eds.):Terrorism, Economic Development, and Political Openess

2012

A questionnaire to assess parental perception of barriers towards active commuting to school (PABACS): Reliability and validity

2019

Abstract Introduction Parental barriers are a key factor to determine physical activity behaviors, such as active commuting to school in young people. The purpose of this study was to test the reliability and validity of a questionnaire which addresses parental barriers towards active commuting to school. Methods This paper describes the development, following the Delphi method, and the validation of a Likert-scale questionnaire of 23 items (Parental Perception of Barriers towards Active Commuting to School (PABACS)) designed to determine the main parental barriers. These barriers are categorized into 3 scales (general, walking, and cycling barriers) and the overall questionnaire. A total o…

The Integrated Migrant worker Safety Training Evaluation Model: IMSTEM

2021

Abstract This paper presents the development of the IMSTEM (Integrated Migrant worker Safety Training Evaluation Model), which aims to provide guidance on how to evaluate the transfer of safety training of migrant workers. Addressing the lack of rigorous safety training evaluation frameworks, the IMSTEM, using a mixed methods, multi-source approach, covers the deficiencies of previous models. The IMSTEM has its foundations in three main sources: a) the integration of safety training literature in relation to migrant workers; b) the theoretical framework of realist evaluation, which enables evaluators to understand what works for whom in which circumstances; and c) the integration of the tra…

Management and use of filter masks in the “none-medical” population during the Covid-19 period

2020

Abstract SARS-CoV-2 has become a pandemic disease declared by the World Health Organization, consequently each nation has taken a series of actions managed by the government in order to prevent the spread of this dangerous virus. The most common countermeasure is the use of a mask that should cover the mouth and nose to filter the inhaled and exhaled air. Those masks are medical devices that should be handled properly; unfortunately in our study, observation of the population during the so-called “phase 2″ has very often shown an inappropriate use of any type of mask which reduces its effectiveness. The correct dissemination of adequate information on how to use the mask and the strict cont…

Working conditions, job strain, and traffic safety among three groups of public transport drivers

2018

Background: Working conditions and psychosocial work factors have acquired an important role explaining the well-being and performance of professional drivers, including those working in the field of public transport. This study aimed to examine the association between job strain and the operational performance of public transport drivers and to compare the expositions with psychosocial risk at work of three different types of transport workers: taxi drivers, city bus drivers, and interurban bus drivers. Method: A sample of 780 professional drivers was drawn from three transport companies in Bogota (Colombia). The participants answered the Job Content Questionnaire and a set of sociodemogra…

Pseudo-Media Sites, Polarization, and Pandemic Skepticism in Spain

2021

The Coronavirus pandemic has triggered an authentic infodemic, which is a global epidemic of disinformation that has spread throughout most of the world. Social media platforms and pseudo-media outlets have contributed to the problem by producing and disseminating misleading content that is potentially dangerous to public health. This research focuses on a rather unknown phenomenon, which involves digital sites that mimic the appearance of news media but provide pseudo-information. Five Spanish pseudo-media have been analyzed with the aim of enhancing understanding of the issues and the frames presented. The results show clear links with the far-right ideology as well as the presence of a p…

Governance in the metropolitan area of Valencia (Spain): an unfinished business

2023

Metropolitan government is still an unfinished business in Spain. An example of this is the metropolitan area of Valencia. The aim of this article is to learn about the process that has led to the current situation of a lack of metropolitan government and to propose actions that will help to make it a reality in the not-too-distant future. To this end, it analyses the history and the current regulations, and it is completed with the opinions and contributions of academics and politicians. The result is that, although there is no political will to include the consolidation of a metropolitan government in Valencia in the current political agenda, it is possible to set in motion initiatives of…