Surjit Paul and Saini Das
This study explores how effectively the Indian government utilized social media to communicate emergency information and promote citizen engagement and awareness during the first…
Abstract
Purpose
This study explores how effectively the Indian government utilized social media to communicate emergency information and promote citizen engagement and awareness during the first wave of COVID-19 crisis.
Design/methodology/approach
This research investigates the tweets scraped from the official Twitter handle “CovidnewsbyMIB” of the Ministry of Information and Broadcasting Government of India; the authors unearthed patterns in the communications between the government and its citizens by adopting various social media analysis techniques. Further, the authors also tried to examine the influence of media richness and dialogic loop on citizen engagement through government social media (CEGSM) using multivariate analysis method.
Findings
The results highlighted clusters of words/terms present in the tweets related to COVID-19 combating strategies, guidelines, and updates. The authors also found that media richness has a significant positive relationship with CEGSM, but dialogic loop has an insignificant relationship with CEGSM.
Originality/value
This study provides suggestions to government agencies about ways to improve CEGSM by enhancing media richness and dialogic loop elements such as surveys, polls, and responses in the crisis communication.
Peer review
The peer review history for this article is available at: https://publons.com/publon/10.1108/OIR-06-2021-0307.
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Navin Kumar, Ravinderjit Singh Walia and Surjit Angra
The purpose of this study is to develop jute-glass hybrid fibre reinforced polyester-based bio-composites using an indigenously developed pultrusion set-up and to present a…
Abstract
Purpose
The purpose of this study is to develop jute-glass hybrid fibre reinforced polyester-based bio-composites using an indigenously developed pultrusion set-up and to present a detailed discussion on their mechanical characterization.
Design/methodology/approach
The work was carried out to observe the hybridization effect of natural and synthetic fibres in combination with hybrid fillers loading mainly on strength and other properties. The used hybrid fillers were a combination of 9 Wt.% of carbon black%, 6 Wt.% of eggshell ash powder and 6 Wt.% of coconut coir ash powder. A lab-based developed pultrusion set-up was used to develop these hybrid GJFRP composites of 1,500 mm length. The developed composites were tested for tensile strength, compressive strength and impact strength.
Findings
The maximum tensile, compressive and impact strength obtained are 88.37 MPa, 56.13 MPa and 731.91 J/m from 9 Wt.%, 9 Wt.% and 0 Wt.% of hybrid fillers loading, respectively. Breaking energy was found maximum as 7.31 J in hybrid glass-jute hybrid fibre reinforced plastic composites with no filler loading and it was observed that filler loading was decreasing the impact strength of developed hybrid composites. Shrinkage and its variations in the diameter of the finally developed cylindrical shape composites were observed after cooling and solidification. Scanning electron microscopy was used to observe the internal cracks, bonding of fibres and resin, voids, etc.
Originality/value
Development of hybrid filler based novel eco-friendly bio-composites and its experimental investigation on the impact strength, tensile strength and compressive strength has not been attempted yet.
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Dinesh Kumar, Satnam Singh and Surjit Angra
This study aims to investigate the corrosion behavior of stir-cast hybrid aluminum composite reinforced with CeO2 and graphene nanoplatelets (GNPs) nanoparticulates used as…
Abstract
Purpose
This study aims to investigate the corrosion behavior of stir-cast hybrid aluminum composite reinforced with CeO2 and graphene nanoplatelets (GNPs) nanoparticulates used as cylinder liner material in the engines (automotive, aerospace and aircraft industries).
Design/methodology/approach
The composites were prepared using the stir-casting technique, and their microstructure and corrosion behavior was evaluated using scanning electron microscopy (SEM) and potentiodynamic polarization test, respectively.
Findings
The results showed that the addition of CeO2 and GNPs improved the corrosion resistance of the composites, and the optimal combination of these two nanoparticles was found to be 3 wt.% CeO2 and 3 wt.% GNPs. The enhanced corrosion resistance was attributed to the formation of a protective layer on the surface of the composite, as well as the effective dispersion and uniform distribution of nanoparticles in the matrix. The 0.031362 was noted as the lowest corrosion rate (mmpy) and was noticed in 94% Al-6061 alloy + (3 Wt.% CeO2 + 3 Wt.% GNPs) sample at room temperature and at elevated temperatures; the corrosion rate (mmpy) was observed as 0.0601 and 0.0636 at 45 °C and 75 °C, respectively.
Originality/value
In the vast majority of the published research publications, either cerium oxide or graphene nanoplatelets were utilized as a single reinforcement or in conjunction with other types of reinforcement such as alumina, silicon carbide, carbon nano-tubes, tungsten carbide, etc., but on the combination of the CeO2 and GNPs as reinforcements have very less literatures with 2 wt.% each only. The prepared hybrid aluminum composite (reinforcing 1 wt.% to 3 wt.% in Al-6061 alloy) was considered for replacing the cylinder liner material in the piston-cylinder arrangement of engines.
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Over the years we have reported prosecutions where the defence has alleged, and with circumstantial support that the presence of a harmful foreign body in food was deliberate…
Abstract
Over the years we have reported prosecutions where the defence has alleged, and with circumstantial support that the presence of a harmful foreign body in food was deliberate through the action of a single disgruntled employee or where the labour relations climate generally has been bad. It makes no difference to the manufacturer's responsibility—the offence is an absolute one—but occasionally courts have allowed it in mitigation. Sometimes, it has been the nature of the extraneous material, e.g. fragments of glass or metal, the like of which did not exist in the factory premises or plant. This may be taken as a symptom of the vandalism of the age, but more recently, two incidents have drawn attention to its dangers and provided a glimpse of the criminal mind which can inflict such injury on employers, and expose innocent consumers, of all ages, to possible harm.