Aida Bennouna, Assia Boughaba, Mohamed Mouda and Salim Djabou
This study aims to examine the long-term impact of leader–member exchange (LMX) on employee safety behavior. It proposes a conceptual model that includes the mediating role of job…
Abstract
Purpose
This study aims to examine the long-term impact of leader–member exchange (LMX) on employee safety behavior. It proposes a conceptual model that includes the mediating role of job satisfaction (JS) in the relationship between LMX and safety behaviors, regarding safety compliance behavior (SCB) and safety participation behavior (SPB).
Design/methodology/approach
Data were collected from 325 health-care workers across public hospitals in Algeria at three waves. Data were analyzed with partial least square structural equation modeling.
Findings
The findings revealed that LMX positively influenced employees’ job satisfaction. However, the relationship between LMX and SCB was found to be mediated by job satisfaction. LMX was not directly related to both dimensions of safety behavior, whereas JS was positively associated with safety compliance and safety participation.
Originality/value
This is the first paper, to the best of the authors’ knowledge, to report on the significant mediating role of JS on the reciprocal process used to exchange resources between leaders and subordinates and safety behaviors among health-care workers, thereby filling an important research gap in existing literature.
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Djebabra Mébarek, Mouda Mohamed and Bellaala Djamel
– The purpose of this paper is to assist organizations in the professional risk prevention.
Abstract
Purpose
The purpose of this paper is to assist organizations in the professional risk prevention.
Design/methodology/approach
It consists of a proposal for a BQA method of the work procedures analysis.
Findings
In the suggested method, the authors use the principles of BQA and propose a new formulation of parameters of a work procedures simplification.
Practical implications
The suggested method constitutes an invaluable help to implementation of the work permits system.
Originality/value
The suggested method facilitates the process of working safety assessment providing substantial assistance to one of the most important stages that is to decide which particular indicators will be considered.
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Mouhcine Mouda, Mohamed Nabhani and Mohamed El Khlifi
This study aims to examine the magneto-elastohydrodynamic effect on finite-width slider-bearings lubrication using a non-Newtonian lubricant.
Abstract
Purpose
This study aims to examine the magneto-elastohydrodynamic effect on finite-width slider-bearings lubrication using a non-Newtonian lubricant.
Design/methodology/approach
Based on the magneto-hydrodynamic (MHD) theory and Stokes micro-continuum mechanics, the modified two-dimensional Reynolds equation including bearing deformation was derived.
Findings
It is found that the bearing deformation diminishes the load-capacity and increases the friction coefficient in comparison with the rigid case. However, the non-Newtonian effect increases load-capacity but decreases the friction coefficient. Moreover, the use of a transverse magnetic field increases both the friction coefficient and load capacity.
Originality/value
This study combines for the first time MHD and elastic deformation effects on finite-width slider-bearings using a non-Newtonian lubricant.
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Mouhcine Mouda, Mohamed Nabhani and Mohamed El Khlifi
The purpose of this paper is to examine the effect of surface roughness on the magneto-hydrodynamic (MHD) non-parallel squeeze film lubrication using non-Newtonian lubricant.
Abstract
Purpose
The purpose of this paper is to examine the effect of surface roughness on the magneto-hydrodynamic (MHD) non-parallel squeeze film lubrication using non-Newtonian lubricant.
Design/methodology/approach
Based on the MHD thin film lubrication theory and the Stokes theory and homogenization method, the homogenized MHD Reynolds equation is derived considering the squeezing effect.
Findings
It is found that the obtained results indicate that the interaction among non-Newtonian, MHD and surface roughness influences is significant.
Originality/value
This study is original which compares the dimensionless load capacity and dimensionless response time among transverse, longitudinal and, for the first time, anisotropic surface roughness types under magneto-hydrodynamic non-Newtonian non-parallel squeeze film lubrication.
Peer review
The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-02-2020-0071/
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Mohammed Kardoudi, Mohamed Nabhani and Mohamed El Khlifi
This paper aims to present a numerical model to examine the finite magneto-hydrodynamic (MHD) journal bearings performances including both non-Newtonian couple stress and bearing…
Abstract
Purpose
This paper aims to present a numerical model to examine the finite magneto-hydrodynamic (MHD) journal bearings performances including both non-Newtonian couple stress and bearing deformation impacts.
Design/methodology/approach
Based upon the MHD and Stokes theories, a novel expression of modified Reynolds equation including bearing deformation is obtained. The bearing elastic deformation impact is predicted by means of the Winkler model. Using the numerical differentiation approach, the film pressure is iteratively solved. Different bearing characteristics are then numerically calculated. The validity of the proposed model was verified by comparing with some particular cases from literature.
Findings
From the numerical presented results, it is demonstrated that the conducting couple stress lubricant with an applied radial magnetic field results in an induced electric current density and thus significantly improves the performances of elastic journal bearings. Particularly, the load-carrying capacity is increased, whereas a reduction in friction factor is observed.
Originality/value
This numerical model is original, which combines both non-Newtonian couple stress and bearing deformation impacts on finite MHD journal bearings performances. It provides useful information in designing MHD journal bearings, given the lack of experimental studies.