Anas Obeidat, Teis Schnipper, Kristian M. Ingvorsen, Sajjad Haider, Knud Erik Meyer, Stefan Mayer and Jens H. Walther
– The purpose of this paper is to study the effect of piston position on the in-cylinder swirling flow in a simplified model of a large two-stroke marine diesel engine.
Abstract
Purpose
The purpose of this paper is to study the effect of piston position on the in-cylinder swirling flow in a simplified model of a large two-stroke marine diesel engine.
Design/methodology/approach
Large eddy simulations with four different models for the turbulent flow are used: a one-equation model, a dynamic one-equation model, a localized dynamic one-equation model and a mixed-scale model. Simulations are carried out for two different geometries corresponding to 100 and 50 percent open scavenge ports.
Findings
It is found that the mean tangential profile inside the cylinder changes qualitatively with port closure from a Lamb-Oseen vortex profile to a solid body rotation, while the axial velocity changes from a wake-like profile to a jet-like profile. The numerical results are compared with particle image velocimetry measurements, and in general, the authors find a good agreement.
Research limitations/implications
Considering the complexity of the real engine, the authors designed the engine model using the simplest configuration possible. The setup contains no moving parts, the combustion is neglected and the exhaust valve is discarded.
Originality/value
Studying the flow in a simplified engine model, the setup allows studies of fundamental aspects of swirling flow in a uniform scavenged engine. Comparing the four turbulence models, the local dynamic one-equation model is found to give the best agreement with the experimental results.
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Shatha M. Obeidat, Shahira Abdalla and Anas Abdel Karim Al Bakri
This study aims to contribute to the current Green human resource management (HRM) field by providing an empirical examination of a comprehensive model that tests the effect of…
Abstract
Purpose
This study aims to contribute to the current Green human resource management (HRM) field by providing an empirical examination of a comprehensive model that tests the effect of green strategic intent on Green HRM implementation, the possible effect of Green HRM and green empowerment on circular economy, and the effect of circular economy on sustainable performance. It examines the mediating effect of circular economy on the link between Green HRM and sustainable performance.
Design/methodology/approach
The study is empirical in nature. It focuses on the service sector in Qatar. Managers that work in the service sector represent the study participants. 149 questionnaires were collected and 131 completed questionnaires were used in the analysis. An advanced Partial Least Squares Structural Equation Modeling (SEM-PLS) analysis was conducted to reveal the study results.
Findings
The study findings confirmed the positive effect of green strategic intent on Green HRM, the positive link between Green HRM and green empowerment on circular economy, and the positive relationship between circular economy and sustainable performance. It also confirms the indirect effect of circular economy on the link between green HRM and sustainable performance.
Research limitations/implications
Because of the chosen research approach and the focus on the service sector in Qatar only, research results may lack generalizability.
Practical implications
This study provides important implications for practice on how to improve Green HRM practices; particularly for its unique context, the Qatari service sector.
Originality/value
This study is considered original since it is one of the few to examine a conceptual framework that links Green HRM, circular economy and sustainable performance.
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Myriam Aloulou, Rima Grati, Anas Ali Al-Qudah and Manaf Al-Okaily
The purpose of this study is to discuss the United Arab Emirates’ (UAE) favorable attitude toward the financial sector’s digital transformation and the development of FinTech due…
Abstract
Purpose
The purpose of this study is to discuss the United Arab Emirates’ (UAE) favorable attitude toward the financial sector’s digital transformation and the development of FinTech due to the rise of financial technology. FinTech blends innovation and technology to provide financial inclusion to stakeholders through various new products and services such metaverse and artificial intelligence.
Design/methodology/approach
A quantitative research approach was used to empirically validate the suggested research model by using 260 Emirates-based banking authorities and administrators’ data.
Findings
The findings indicate that FinTech adoption had a substantial impact on the competitiveness and performance of the UAE banking industry during COVID-19 times. The research indicates that adequate FinTech implementation and alignment with technology management directly influence the performance of the UAE’s banking sector in difficult times.
Originality/value
This study is critical because the UAE banking sector serves diverse nationalities, and its success is contingent on FinTech and its competitive edge.
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Tareq Osaili, Reyad Shaker Obaid, Sadi Taha, Sofia Kayyaal, Rima Ali, Manal Osama, Refaa Alajmi, Anas A. Al-Nabulsi, Amin Olaimat, Fayeza Hasan and Mutamed Ayyash
The aims of this study were to assess the food safety knowledge amongst domestic workers in the UAE and test the association between their socio-demographic characteristics and…
Abstract
Purpose
The aims of this study were to assess the food safety knowledge amongst domestic workers in the UAE and test the association between their socio-demographic characteristics and food safety knowledge.
Design/methodology/approach
A non-probabilistic sample of 231 domestic workers who help families in food preparation and/or cooking participated in this cross-sectional study. The participants completed a questionnaire composed of socio-demographic characteristics and four different aspects of food safety knowledge (personal hygiene, food poisoning, cross-contamination and temperature control).
Findings
It was observed that the domestic workers had inadequate knowledge about food safety with an overall food safety knowledge score of 32.9%. Total knowledge of “personal hygiene” and “cross-contamination” was relatively higher (46.2 and 43.9%, respectively) than that of “food poisoning” (18.1%) and “temperature control” (23.3%). A significant (P-value < 0.05) association was observed between overall food safety knowledge and marital status, age and education level, but not nationality of domestic workers (Asian or African).
Originality/value
The findings of this study are expected to encourage policy makers mandate food safety trainings for this segment of the population besides helping them in creating awareness and training programs regarding food safety.
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Yasmeen Abu Sumaqa, Sajeda Alhamory, Manar Abu-Abbas, Ahmad Rayan, Mutaz Foad Alradaydeh, Nour Alrida, Omymah Zain Alddin Al-Rajabi, Mohammad Y. Alzaatreh, Anas H. Khalifeh, Saleh Al Omar and Manal Mohamed Abd EINaeem
The purpose of this paper is to assess the perceived level of Jordanian nurses’ competencies in offering care to the community during a disaster.
Abstract
Purpose
The purpose of this paper is to assess the perceived level of Jordanian nurses’ competencies in offering care to the community during a disaster.
Design/methodology/approach
A correlational descriptive design was used to assess nurses’ competencies in offering care for the community during a disaster.
Findings
A total of 370 nurses (55 % males) aged 25−55 agreed to participate. The mean score of competencies of nurses who offer care to the community during the disaster was 2.11 (SD = 0.59) points. The results of correlation coefficient tests revealed a significant positive correlation between stated competencies level and nurses’ sex, receiving disaster education and training with rpb (371) = 0.13, p < 0.01; rpb (598) = 0.15, p = 0.004; rpb (598) = 0.21, p < 0.001, respectively. Furthermore, the “care of communities” subscale had a weak positive correlation with the.
Originality/value
Nurses play a critical role in disaster response. However, there was a gap in nurses’ competencies for disaster, which shows there is a crucial need to include disaster management courses in the nursing curriculum and update disaster management courses in hospitals based on nurses’ needs to improve their competencies during disasters.
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Isaac Nyarko Adu, Kwame Owusu Boakye, Samuel Yeboah and Evelyn Twumasi
This study seeks to examine the mediating role of innovative work behavior (IWB) in the relationship between entrepreneurial leadership (EL) and employee performance.
Abstract
Purpose
This study seeks to examine the mediating role of innovative work behavior (IWB) in the relationship between entrepreneurial leadership (EL) and employee performance.
Design/methodology/approach
The study adopted the cross-sectional research design of quantitative approach where data were collected from 344 employees in Ghana’s food and beverages industry. The retrieved data were analyzed using descriptive and inferential statistics (partial least squares structural equation modeling).
Findings
Mainly, the study revealed that IWB positively and significantly mediated the relationship between EL and contextual and task performance (TP). The study found that EL has a significant positive relationship with task and contextual performance (CP). This indicates that leaders who demonstrate entrepreneurial qualities, such as innovation, proactiveness and risk-taking, are likely to enhance their team’s ability to complete specific tasks effectively (TP) and contribute positively to the broader organizational environment (CP).
Practical implications
Practically, organizations that prioritize EL qualities among managers and supervisors in the form of providing training programs, coaching and mentorship opportunities that emphasize innovation, risk-taking and pro-activeness in decision-making significantly influence their employee performance.
Originality/value
The originality and value of this study lie in its comprehensive exploration of the relationship between EL, IWB and performance outcomes.
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H.T. Rahal, A.M. Abdel-Gaber, R. Awad and B.A. Abdel-Naby
The paper aims to examine the inhibition effect of NiO nanoparticles and the influence of liquid nitrogen immersion on the corrosion behavior of (NiO)x(Bi1.6 Pb0.4)Sr2Ca2Cu3O10-δ…
Abstract
Purpose
The paper aims to examine the inhibition effect of NiO nanoparticles and the influence of liquid nitrogen immersion on the corrosion behavior of (NiO)x(Bi1.6 Pb0.4)Sr2Ca2Cu3O10-δ and (NiO)x (Bi, Pb 2223), where x = 0.00 and 0.05 Wt.% phase superconductor in 0.1 M Na2SO4 at 30°C.
Design/methodology/approach
This study was done using open-circuit potential electrochemical impedance spectroscopy, potentiodynamic polarization curves and chronoamperometry measurements.
Findings
Potentiodynamic polarization technique showed that NiO nanoparticles suppress both the anodic and cathodic parts of the polarization curves of (NiO)x(Bi, Pb)-2223 superconductor in 0.1 M Na2SO4 solution. A significant enhancement in the corrosion resistance of the prepared superconductors is observed on immersing them in liquid nitrogen. This is owing to the fact that immersion in liquid nitrogen increases the volume contraction of the superconductor matrix, causing the shrinkage of the pores and voids present in the samples and thus reducing the active surface area for the dissolution of (NiO)x(Bi, Pb)-2223 superconductor matrix.
Originality/value
This paper fulfills the need to investigate the corrosion behavior of superconductors and the influence of liquid nitrogen immersion on such behavior.
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William Hanna Alkunsol, Abdel-Aziz Ahmad Sharabati, Nidal Amin AlSalhi and Hamza Sultan El-Tamimi
This study aims to investigate the effect of Lean Six Sigma elements on the Jordanian Pharmaceutical Manufacturing organizations’ business performance.
Abstract
Purpose
This study aims to investigate the effect of Lean Six Sigma elements on the Jordanian Pharmaceutical Manufacturing organizations’ business performance.
Design/methodology/approach
Data were collected from 120 managers out of about 300 managers by means of questionnaire. After confirming normality, validity and reliability of the study tool, correlation analysis was carried out, and then multiple regressions were used to test the hypotheses.
Findings
The results show that there is an agreement on high implementation of Lean Six Sigma variables among Jordanian Pharmaceutical Manufacturing organizations; there are strong relationships among Lean Six Sigma variables, except between non-utilized talent and transportation; there are strong relationships between Lean Six Sigma variables and business performance. All Lean Six Sigma variables have effect on business performance, except extra processing and waiting time.
Research limitations/implications
This study was carried out on the pharmaceutical industry in Jordan, generalizing results of one industry and/or one country to other industries and/or countries may be questionable. Extending the analyses to other industries and countries represents future research opportunities.
Practical implications
Implementing Lean Six Sigma variables in all Jordanian Pharmaceutical Manufacturing organizations can improve their business performance; also, it can be applied to other manufacturing industry.
Social implications
The aim of all organizations is to reduce waste, which leads to reserve the natural resources, which is considered as a corporate social responsibility.
Originality/value
Only few studies related to Lean or Six Sigma have been carried out in pharmaceutical industry in Jordan. Therefore, this study might be considered as an initiative study, which studies the effect of both Lean and Six Sigma on pharmaceutical industry in Jordan.