Mohammed Fahad and Bavanish B.
Aviation field requires a material with greater tribological characteristics to withstand the critical climate conditions. Hence, it is of paramount importance to enhance the wear…
Abstract
Purpose
Aviation field requires a material with greater tribological characteristics to withstand the critical climate conditions. Hence, it is of paramount importance to enhance the wear resistance of material. AZ91D magnesium alloy is a light weight material used in the aviation field for the construction work. The purpose of this study is to augment the wear properties of AZ91D alloy by reinforcing with hard particles such as tungsten carbide (WC) and silicon dioxide (SiO2).
Design/methodology/approach
In this work, three types of composites were fabricated, namely, AZ91D – WC, AZ91D – SiO2 and AZ91D – (WC + SiO2) by ball milling method, and the tribological properties were analyzed using pin-on-disc apparatus.
Findings
Results showed that the hardness of AZ91D alloy was greatly improved due to the reinforcing effects of WC and SiO2 particles. Wear study showed that wear rate of AZ91D alloy and its composites increased with the increase of applied load due to ploughing effect and decreased with the increase of sliding speed owing to the formation of lubricating tribolayer. Further, the AZ91D – (WC + SiO2) composite exhibited the lower wear rate of 0.0017 mm3/m and minimum coefficient of friction of 0.33 at a load of 10 N and a sliding speed of 150 mm/s due to the inclusion of hybrid WC and SiO2 particles. Hence, the proposed AZ91D – (WC + SiO2) composite could be a suitable candidate to be used in the aviation applications.
Originality/value
This work is original which deals with the effect of hybrid particles, i.e. WC and SiO2 on the wear performance of the AZ91D magnesium alloy composites. The literature review showed that none of the studies focused on the reinforcement of AZ91D alloy by the combination of carbide and metal oxide particles as used in this investigation.
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Mohammed Fahad and Bavanish B.
The aviation field requires a material with the ability to withstand severe environmental conditions. The purpose of this paper is to provide higher wear resistance and improve…
Abstract
Purpose
The aviation field requires a material with the ability to withstand severe environmental conditions. The purpose of this paper is to provide higher wear resistance and improve the lifetime of aircraft. Hence, it is vital to enhance the wear resistance and strength of the material.
Design/methodology/approach
In this investigation, the Az91D magnesium alloy was reinforced with lanthanum (La2O3) and cerium oxide (CeO2) nanoparticles by stir casting and heat treatment process and the tribological and mechanical properties were analyzed.
Findings
The results showed the Az91D/CeO2 composite exhibited higher density (1.96 g/cm3) and lower porosity (1.01%) compared to other materials due to the diffusion of CeO2 nanoparticles in between the atoms of Az91D alloy. The hardness of Az91D/ CeO2 & Az91D/ La2O3 was improved by 38% and 34%, respectively, compared to Az91D alloy owing to the reinforcing effect of hard nanoparticles. Further, the inclusion of nanoparticles decreased the mass loss and showed lower wear rate compared to the Az91D alloy due to the pinning effect of nanoparticles. In addition, the friction coefficient was observed in the order of Az91D > Az91D/ La2O3 > Az91D/ CeO2. Moreover, the heat treatment displayed positive results on the properties of all the materials.
Originality/value
This work is original as the combination of cerium oxide nanoparticles with Az91D magnesium alloy is not tried by earlier investigators. Further, the comparative performance of both lanthanum and cerium oxide nanoparticles on the tribological and mechanical behavior of Az91D alloy has been analyzed for aviation application. This study will provide new information to the scientific world to increase the lifetime of aviation structures.
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Fraud has never respected national boundaries. But the advent of the Internet and modern technology has increased the ease with which money and documents can be transferred…
Abstract
Fraud has never respected national boundaries. But the advent of the Internet and modern technology has increased the ease with which money and documents can be transferred worldwide. The Fraud Advisory Panel's first annual report estimates that fraud could be costing £5bn a year and is likely to get worse following the introduction of the Euro and the growth in e‐commerce. When fraud is unearthed, there are three key elements to frustrating the fraudster and recovering the monies, namely speed, secrecy and surprise.
Rubina Begum, Fahad Riaz Choudhry, Tahir Mehmood Khan, Faizah Safina Bakrin, Yaser Mohammed Al-Worafi and Khadeeja Munawar
The term “Mental health literacy” is defined as knowledge and beliefs about mental disorders which aid their recognition, management or prevention. The importance of health…
Abstract
Purpose
The term “Mental health literacy” is defined as knowledge and beliefs about mental disorders which aid their recognition, management or prevention. The importance of health literacy for physical health is widely studied; however, the area of mental health literacy in Pakistan has been comparatively neglected. The purpose of this paper is to address the knowledge about mental health in people living in Pakistan.
Design/methodology/approach
Relevant literature relating to mental health literacy was identified through various database searches. The databases searched included: PubMed, Cochrane database of Systemic Reviews, PsycINFO using the terms mental health, mental health literacy, mental health education, Pakistan.
Findings
Literature suggests that there is dearth of knowledge about mental illnesses and their treatment among public. This review also highlights the importance of mental health literacy among professionals working in the field of health care. In Pakistan, due to low literacy rate, a high percentage of poverty and dearth of trained professionals warrants an emendation in approaches established for attaining the goal of public health and psychiatric care.
Practical implications
Findings have implications for practitioners in the field of mental health care as well as designing targeted interventions for enhancing mental health literacy and help-seeking behavior in the future.
Originality/value
A limited understanding and lack of improvement in mental health literacy may interfere with society’s acceptance of evidence-based mental health care which may hamper the delivery of adequate mental health services to the needy.
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Abdullah Fahad AlMulhim, Sanaa Mostafa Mohammed, Houcine Benlaria and Zouheyr Gheraia
The objectives of this research were to inspect the relationship of intellectual capital (IC), along with its dimensions (human, structural and internal and external relational…
Abstract
Purpose
The objectives of this research were to inspect the relationship of intellectual capital (IC), along with its dimensions (human, structural and internal and external relational capital) with innovation performance (IP), to explore entrepreneurial opportunity recognition (EOR) as a mediator between the IC and IP of small and medium-sized enterprises (SMEs) in Saudi Arabia.
Design/methodology/approach
This research used data collected via a well-structured questionnaire. The sample size was comprised of 457 participants who were owners and/or managers of SMEs in Saudi Arabia. Further, the findings were extracted from data using partial least squares (PLS) techniques.
Findings
The results indicated that all dimensions of IC, including human capital (HC), structural capital (SC), internal relational capital (IRC) and external relational capital (ERC), had a significant relation with both IP and EOR. It was also shown that EOR positively influenced IP. Furthermore, the results showed that EOR played an important role as a mediator between IC (HC, SC, IRC and ERC) and IP.
Practical implications
The present research offered a beneficial and novel managerial and theoretical strategy for improving a given firm’s IP with the support of IC and EOR. This finding offered a vision to the management teams of SMEs for full utilization of IC and IP. The present study also provided policymakers, administration and future studies with a path to improving the production and services of SMEs to secure market advantages.
Originality/value
According to the author’s best knowledge, the present research represented the first attempt to expose the mediating role of the EOR relationship between IC and IP. Furthermore, the present study also developed the relationship between dynamic capabilities (DC) theory, intellectual capital-based view (ICV) theory and resource-based view (RBV) theory, with variables that reveal the theoretical foundation of the study. Finally, the results of this study were verified by the existing literature.
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Fahad Riaz Choudhry, Khadeeja Munawar, Bushra Akram, Yaser Mohammed Al-Worafi, Faizah Safina Bakrin, Li Ying Tey, Sabrina Anne Jacob, Goh Bey Hing, Tahir Mehmood Khan, Lee Learn Han and Anila Kamal
The purpose of this paper is to provide an insight into xylophagia, its treatment, intervention options, etiological causes and possible relationship with other diseases.
Abstract
Purpose
The purpose of this paper is to provide an insight into xylophagia, its treatment, intervention options, etiological causes and possible relationship with other diseases.
Design/methodology/approach
A systematic search was performed across four scientific databases (i.e. Ovid Medline, Embase via Ovid, PubMed and ProQuest). All of the qualitative studies reporting on xylophagia from the inception of databases until August 2019 have been included. The quality of included studies was assessed through a ten-item checklist given by Kmet et al. (2004).
Findings
A total of 18 studies were included, and five primary themes emerged after analysis: precipitation/onset of xylophagia, co-morbid psychiatric or medical illnesses, assessment and investigation modes to confirm diagnosis, outcomes of xylophagia and treatment options comprising medical care, psychological care, counseling and duration of recovery. There were 16 females and 9 males in included studies. The mean ages and standard deviations of males and females were 29.25(12.17) years and 32.81(11.92), respectively. The mean duration and standard deviation of paper pica were 4.80(4.27) years.
Research limitations/implications
Despite the limitation that this meta-synthesis is based upon findings from case studies, results show that standardized medication regimens for treating xylophagia are still not available or are unknown. There is a dire need for further research in order to better understand the disorder. The healthcare professionals need to use reciprocal, mutually constituent influence of biological and sociocultural factors in order to screen, diagnose and manage complex psychological problems like xylophagia.
Originality/value
The findings advance our understanding of the positive effects of patients and family members undergoing counseling or cognitive behavior therapy in reducing stress and enhancing coping skills thus, avoiding self-damaging behaviors.
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Abdullah Fahad AlMulhim and Sanaa Mostafa Mohammed
Applicable to telecom companies operating in Saudi Arabia, this study aims to investigate the mediating role of workplace dignity (WD) in the relationship between inclusive…
Abstract
Purpose
Applicable to telecom companies operating in Saudi Arabia, this study aims to investigate the mediating role of workplace dignity (WD) in the relationship between inclusive leadership and innovative work behavior (IWB) as well as the moderate role of workplace inclusion (WI) in said relationship.
Design/methodology/approach
A total of 364 telecom companies in Saudi Arabia participated in the survey study. SmartPLS was employed to evaluate the data and test the research variables.
Findings
According to this study, inclusive leadership has a favorable impact on IWB. Additionally, the study concluded that inclusive leadership enhances WD. Furthermore, the authors discovered that WD has a favorable impact on IWB. The findings showed that the association between inclusive leadership and IWB is mediated by WD. Finally, WI has a statistically positive moderating effect between WD and IWB on the moderation side of the analysis.
Originality/value
This study is the first to consider WD as a mediator in the relationship between inclusive leadership and IWB. Examining WI's role as a moderator also deepens the authors' comprehension of the connection between WD and IWB.
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Ahmad Nabeel Siddiquei, Hassan Imam and Fahad Asmi
Temporal leadership is a new construct that predicts team outcomes. This study examines the mediating role of shared temporal cognitions and the moderating role of time pressure…
Abstract
Purpose
Temporal leadership is a new construct that predicts team outcomes. This study examines the mediating role of shared temporal cognitions and the moderating role of time pressure in the relationship between temporal leadership and project success within sustainable construction projects.
Design/methodology/approach
The multi-source and multi-wave data were collected via self-administered questionnaires from teams working on sustainable construction projects. The direct and mediating hypotheses were tested using multi-level structural equation modelling, while moderated mediation hypotheses were examined by applying the bootstrap method using SPSS Process Macro.
Findings
The results showed that temporal leadership enables project success via shared temporal cognitions. Temporal leadership is most beneficial for facilitating project success via shared temporal cognitions when teams experience high time pressure.
Originality/value
This is the first study examining shared temporal cognitions as a mediator of the relationship between temporal leadership and project success. Also, this is the first study that considered time pressure as a boundary condition that influences the relationships between temporal leadership, shared temporal cognitions and project success within sustainable construction projects. The study provides valuable advice to project managers and project-based construction organizations about using and managing time within projects.
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Strategy and business models (BMs) are key to success and are increasingly used by organisations. Using the Baldrige Excellence Framework (BEF), this study mainly aims to analyse…
Abstract
Purpose
Strategy and business models (BMs) are key to success and are increasingly used by organisations. Using the Baldrige Excellence Framework (BEF), this study mainly aims to analyse the role of BM implementation, as captured by operating model (OM) and enterprise architecture (EA), in the context of business excellence models.
Design/methodology/approach
The research model is analysed using partial least squares and survey data from 203 Saudi firms.
Findings
The findings show that the importance of BM implementation (i.e. OM and EA execution) is reinforced by the mediating effect exerted by these constructs between strategy and organisational results. In addition, this study develops a conceptual framework depicting the integration of BMs and the BEF. It also discusses the resultant implications for theory, management practice and future research.
Originality/value
In the context of business excellence models, empirical analyses on the extent to which strategy and BMs can be interrelated and integrated are scarce. This paper contributes to filling this research gap.
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Mohamed Ezzat Khalifa, Adil Abdullah Gobouri, Mohamed Hesham Hassan Mahmoud, Abdulraheem Safar Almalki and Fahad Mustafa Kabli
This paper aims to synthesize new benzimidazole dyes aiming to study the solvent effects on their absorption in Ultraviolet-visible spectra.
Abstract
Purpose
This paper aims to synthesize new benzimidazole dyes aiming to study the solvent effects on their absorption in Ultraviolet-visible spectra.
Design/methodology/approach
Ureido/thioureido hydrazonamide benzimidazoles (U/THB) are prepared by condensation of N-aryl-1H-benzo[d]imidazole-2-carbohydrazonoyl bromides with ureido and/ or thioureido reagents. The target products are fully characterized for structural elucidation by means of their spectral and elemental methods. Solvatochromic behavior of U/THB dyes has been studied in different polar protic solvents at room temperature.
Findings
The absorption spectra distinguish two main bands at (350 nm–442 nm) and (308 nm–382 nm) referring to n-π* and π- π* transitions of the azo groups. Dimethyl formamide induces an extremely bathochromic transition comparing to the other protic solvents. The observed bathochromic shifts indicate strong interaction with solvents in the excited state. Most dyes show one absorbance in all solvents used, so they may exist in a single tautomeric form (hydrazo form).
Research limitations/implications
In the present paper, the synthesis of U/THB dyes was achieved by a simple and convenient pathway. In addition, the variations in substituents attached to the chromophoric moiety could also be studied.
Practical implications
The new U/THB dyes are accountable for providing good knowledge about their solvation and spectral properties of an order acceptable for industrial utilization.
Social implications
Synthesis of these new benzimidazole derivatives and study of their solvation and spectral properties provides good knowledge, which is very useful in many industrial applications (e.g. dye-sensitized solar cell, etc.).
Originality/value
The synthesized mono azo U/THB dyes are novel members in the benzimidazole family, where no details regarding the synthesis of such dyes are reported before in the literature. They are superior in terms of preparation, multiple applications and spectral properties.