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Article
Publication date: 9 June 2022

Afaq Ahmad, Zahoor Ahmad, Abdullah Ullah, Naveed Ur Ur Rehman, Muhammad Israr, Muhammad Zia, Haider Ali and Ataur Rahman

This study aims to investigate and compare the characteristics of three topologies of moving-magnet linear oscillating actuator (LOA) based on their mover position. Positive…

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Abstract

Purpose

This study aims to investigate and compare the characteristics of three topologies of moving-magnet linear oscillating actuator (LOA) based on their mover position. Positive aspects and consequences of every topology are demonstrated. Three topologies of axially magnetized moving-magnet LOA; outer mover, inner mover (IM) and dual stator (DS) are designed and examined. Due to its characteristically high thrust density and more mechanical strength, axially magnetized tubular permanent magnets (PMs) are used in these topologies.

Design/methodology/approach

LOAs are designed and optimized using parametric sweep, in term of design parameters and output parameters like thrust force, stroke and operating resonance frequency of the LOA. All the pros and cons of each topology are investigated and compared. Output parameters of the LOAs are compared using same size of the investigated LOAs. Mover mass, which plays a vital role in resonant operation, is analyzed for IM and DS designs. Investigated LOAs are compared with conventional designs of LOA for compressor in refrigeration system with regards of motor constant, stroke and thrust per PM mass.

Findings

This paper analyzes three topologies of moving-magnet LOAs. The basic difference between investigated LOAs is the radius of tubular-shaped mover from its central axis. All the design parameters are compared and concluded that thrust per PM mass of IMLOA is maximum. OMLOA provides maximum motor constant of value 180 N/A. DSLOA provides thrust force with motor constant 120 N/A and required intermediate materials of PMs. All the three designs give the best results in terms of motor constant and thrust per PM mass, compared to conventional designs of LOA.

Originality/value

This paper determines the impact of mover position from its central axis in a tubular-shaped moving-magnet LOA. This work is carried out in correspondence of latest papers of LOA.

Details

World Journal of Engineering, vol. 20 no. 6
Type: Research Article
ISSN: 1708-5284

Keywords

Article
Publication date: 26 August 2021

Sumeet Khalid, Faisal Khan, Zahoor Ahmad and Basharat Ullah

For compactness and ease in assembling, a novel miniature size tubular moving magnet linear oscillating actuator (MT-MMLOA) design for miniature linear compressor application is…

Abstract

Purpose

For compactness and ease in assembling, a novel miniature size tubular moving magnet linear oscillating actuator (MT-MMLOA) design for miniature linear compressor application is proposed in this paper.

Design/methodology/approach

This MT-MMLOA design possesses a modular C-core stator structure having separation at the middle. Axially magnetized tubular permanent magnets are accommodated on the mover. To improve the output parameters of the linear oscillating actuators (LOA), all the design parameters are optimized using a parametric sweep. Finite element analysis of the proposed design is performed to examine the magnetic flux density as well as thrust force under both static and dynamic analysis within the intended stroke range.

Findings

Compared to conventional LOA for miniature compressors, the motor constant of the proposed LOA is 37 N/A that is 85% greater while keeping the same size of LOA. Permanent magnet volume used in the investigated topology of LOA is 26% reduced. Additionally, the overall volume of the machine is 10.3% decreased. Furthermore, the proposed topology is simple, inexpensive and easy to manufacture.

Originality/value

Electromagnetic performance comparison with different topologies proposed earlier in literature is carried out to prove the performance superiority of the proposed design.

Details

World Journal of Engineering, vol. 20 no. 2
Type: Research Article
ISSN: 1708-5284

Keywords

Article
Publication date: 8 July 2022

Mehtab Khan, Adnan Daud Khan, Muhammad Jawad, Zahoor Ahmad, Naveed Ur Rehman and Muhammad Israr

This paper aims to investigates a novel design of a modular moving magnet linear oscillating actuator (MMM-LOA) with the capability of coupling modules, based on their application…

Abstract

Purpose

This paper aims to investigates a novel design of a modular moving magnet linear oscillating actuator (MMM-LOA) with the capability of coupling modules, based on their application and space requirements.

Design/methodology/approach

Proposed design comprised of modules, and modules are separated by using nonmagnetic materials. Movable part of the proposed design of LOA is composed of permanent magnets (PMs) having axial magnetization direction and tubular structure. Stator of the proposed design is composed of one coil individually in a module. Dimensions of the design parameters are optimized through parametric analysis using COMSOL Multi Physics software. This design is analyzed up to three modules and their response in term of electromagnetic (EM) force and stroke are presented. Influence of adding modules is analyzed for both directions of direct current (DC) and alternating input loadings.

Findings

Proposed LOA shows linear increase in magnitude of EM force by adding modules. Motor constant of the investigated LOA is 264 N/A and EM force per PM mass is 452.389 N/kg, that shows significant improvement. Moreover, proposed LOA operates in feasible region of stroke for compressor application. Furthermore, this design uses axially magnetized PMs which are low cost and available in compact tubular structure.

Originality/value

Proposed LOA shows the influence of adding modules and its effect in term of EM force is analyzed for DC and alternating current (AC). Moreover, overall performance and structural topology is compared with state-of-the-art designs of LOA. Improvement with regard of motor constant and EM force per PM mass shows originality and scope of this paper.

Details

World Journal of Engineering, vol. 20 no. 6
Type: Research Article
ISSN: 1708-5284

Keywords

Article
Publication date: 6 April 2022

Sumeet Khalid, Faisal Khan, Basharat Ullah, Zahoor Ahmad and Siddique Akbar

This paper aims to provide an overview of the recent developments and new topologies of single-phase moving magnet linear oscillating actuators (MMLOAs). The key advantage of the…

Abstract

Purpose

This paper aims to provide an overview of the recent developments and new topologies of single-phase moving magnet linear oscillating actuators (MMLOAs). The key advantage of the MMLOA when compared with conventional LOA is the absence of screws, gears and crankshaft mechanism, which results in fewer mechanical parts, simple structure, easy fabrication, lower noise levels and negligible frictional losses.

Design/methodology/approach

The review included papers up to August 2021. The structural designs of alternative topologies are deliberated in detail, and their relative merits and demerits are evaluated. Specific design issues, including pole and tooth number combinations, stroke length, magnet pole ratio and split ratio, are investigated. The imperative phenomena of the resonance, as well as the adjustable stroke, are also discussed in detail.

Findings

The electromagnetic performance in terms of thrust force of selected MMLOA topologies is compared. It is observed that the MMLOA with flux bridge topology has the highest thrust force of 365 N because of the large volume of the permanent magnets (PMs) used, which consequently increased the mass of the mover but based on overall performance analysis, single-phase end ferromagnetic Halbach surface-mounted PM LOA has the highest efficiency around 92%.

Originality/value

This review provides a comparative analysis for different tubular MMLOA topologies based on design construction and their electromagnetic performances.

Details

World Journal of Engineering, vol. 20 no. 5
Type: Research Article
ISSN: 1708-5284

Keywords

Article
Publication date: 10 April 2024

Mubashir Ahmad Aukhoon, Junaid Iqbal and Zahoor Ahmad Parray

The primary objective of this study was to understand the impact of Corporate Social Responsibility on Employee Green Behavior, examining the mediating role played by Green Human…

Abstract

Purpose

The primary objective of this study was to understand the impact of Corporate Social Responsibility on Employee Green Behavior, examining the mediating role played by Green Human Resource Management Practices and the moderating influence of Employee Green Culture.

Design/methodology/approach

To accomplish this, a careful research approach was taken, using a thoughtfully designed random sampling method to encompass 300 banking employees, ensuring a robust representation of the diverse workforce in the banking sector.

Findings

The empirical findings identified green human resource management practices as a pivotal mediator and employee green culture as a significant moderator. It elucidated how the strategic implementation of green human resource management practices can act as an amplifier, strengthening the positive effects of corporate social responsibility on employee green behavior. This insight underscores the strategic importance of aligning human resource practices with sustainability goals to further enhance the environmental consciousness of employees. It was revealed that the presence of a nurturing organizational culture, one that encourages and supports environmentally responsible behaviors can significantly bolster the association between corporate social responsibility and green behavior among employees.

Originality/value

These findings underscore the essential role of organizational culture as a catalyst for the successful implementation of corporate social responsibility initiatives and the cultivation of a sustainable corporate ethos. This comprehensive research underscores the profound significance of corporate social responsibility, green human resource management practices and employee green culture in fostering and promoting environmentally responsible behaviors within the banking industry. These findings hold substantial implications not only for businesses but also for policymakers.

Details

Evidence-based HRM: a Global Forum for Empirical Scholarship, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 2049-3983

Keywords

Article
Publication date: 1 August 2023

Zahoor Ahmad Parray, Shahbaz ul Islam and Tanveer Ahmad Shah

The main goal of this research study is to look at the mediating effect of emotional exhaustion in the association between workplace incivility and job outcomes (job stress, job…

Abstract

Purpose

The main goal of this research study is to look at the mediating effect of emotional exhaustion in the association between workplace incivility and job outcomes (job stress, job satisfaction and employee turnover intentions) in the higher education sector.

Design/methodology/approach

The authors gathered field data from individuals working in the Higher Education Sector of Jammu and Kashmir to test the proposed study paradigm. A total of 550 respondents reported their perceptions of workplace incivility, emotional exhaustion and job-related outcomes (job stress, job satisfaction and employee turnover intention) at Time 1 in the Kashmir division and Time 2 in the Jammu division of Jammu and Kashmir via a two-wave data collection design.

Findings

The findings supported the hypothesized relationships, demonstrating that emotional exhaustion acts as a mediator between workplace incivility and employee job outcomes (job stress, employee job satisfaction and employee intention to leave).

Research limitations/implications

The research was undertaken in Jammu and Kashmir's higher education sectors. As a result, the findings may not apply to other sectors because workplace incivility may be regarded differently in different sectors.

Practical implications

The findings of this research study will assist organizations and practitioners in comprehending the significance of workplace incivility and emotional exhaustion, as well as how they positively impact job-related outcomes (employee job stress, turnover intention) and negatively on job satisfaction.

Originality/value

This research study added to the existing Self-Determination Theory model developed by Deci and associates (2017) by incorporating Emotional Exhaustion, and workplace incivility as autonomous intrinsic and workplace context factors respectively into the SDT model to study work behaviors in terms of job outcomes. This study adds to existing knowledge on SDTs by suggesting and testing emotional exhaustion as a mechanism for determining the impact of workplace incivility on employee job outcomes.

Contribution to impact

Details

International Journal of Educational Management, vol. 37 no. 5
Type: Research Article
ISSN: 0951-354X

Keywords

Article
Publication date: 16 December 2022

Zahoor Ahmad Parray, Tanveer Ahmad Shah and Shahbaz Ul Islam

The major goal of this research is to examine the work-life balance as a mediating factor in the association between psychological capital and employee attitudes including job…

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Abstract

Purpose

The major goal of this research is to examine the work-life balance as a mediating factor in the association between psychological capital and employee attitudes including job satisfaction, organizational commitment and turnover intentions.

Design/methodology/approach

The authors gathered data from prestigious healthcare institutes in North Indian states to test the suggested study model. Data were gathered from 613 personnel employed in public and private healthcare organizations via an online Google form. Structural Equation Modelling (SEM) was applied for analyzing the data.

Findings

The findings validated the expected relations, demonstrating that the association between psychological capital and employee job attitudes is completely mediated by work-life balance.

Research limitations/implications

This research study used cross-sectional data, which fall short of meeting the requirement for proving causation.

Practical implications

The findings of this study will help organizations and practitioners, particularly healthcare administrators and policymakers, better recognize the value of psychological capital and work-life balance, and how they impact job attitudes.

Originality/value

This research study added to the existing self-determination theory (SDT) model developed by Deci et al. (2017) by incorporating psychological capital and work-life balance as autonomous intrinsic and workplace context factors, respectively, into the SDT model to study work behaviors in terms of job outcomes. In addition, the study added to the existing body of knowledge in organizational behavior literature about the role of mediating variables in understanding the indirect effect of personal resources on job attitudes.

Details

Evidence-based HRM: a Global Forum for Empirical Scholarship, vol. 11 no. 3
Type: Research Article
ISSN: 2049-3983

Keywords

Article
Publication date: 17 January 2023

Tanveer Ahmad Shah, Zahoor Ahmad Parray and Shahbaz ul Islam

The goal of this research is to investigate the association between transformational leadership style, psychological capital and job attitude (job satisfaction and organization…

Abstract

Purpose

The goal of this research is to investigate the association between transformational leadership style, psychological capital and job attitude (job satisfaction and organization commitment). Transformational leadership's effects on these job attitudes were also analysed in terms of the mediating effects of psychological capital.

Design/methodology/approach

The authors received 296 authentic questionnaires from the para-medical staff working in different public and private healthcare institutes in Jammu and Kashmir, India, and these were then analysed by using SEM with SPSS 25.0 and AMOS 19.

Findings

Results implied that transformational leadership increased the levels of employees' job attitudes. The results further displayed that transformational leadership and psychological capital in the workplace are positively associated. The results also showed that psychological capital was positively linked with job attitudes. Moreover, psychological capital serves as a mediating construct between transformational leadership and job attitudes.

Practical implications

The outcomes of this research will help in comprehending the significance of transformational leadership and psychological capital. Further, these research findings affirm the effectiveness of transformational leadership and psychological capital in forecasting positive job attitudes in the Indian work context. The administrators and policymakers in the healthcare sector can implement these concepts to reduce negative job outcomes.

Originality/value

This study expanded on Deci et al.’s (2017) existing self-determination theory model by incorporating leadership style and psychological capital as workplace context and autonomous intrinsic factors, respectively, into the self-determination theory model to study work behaviours of job satisfaction and commitment. This study contributes to existing self-determination theory knowledge by proposing and testing psychological capital as a mechanism for determining the effect of transformational leadership on job attitudes (job satisfaction and organizational commitment).

Details

International Journal of Public Leadership, vol. 19 no. 1
Type: Research Article
ISSN: 2056-4929

Keywords

Article
Publication date: 18 October 2022

Zahoor Ahmad Parray, Shahbaz Ul Islam and Tanveer Ahmad Shah

The main goal of this research study is to look at the mediating effect of emotional exhaustion in the association between workplace incivility and job outcomes (job stress, job…

Abstract

Purpose

The main goal of this research study is to look at the mediating effect of emotional exhaustion in the association between workplace incivility and job outcomes (job stress, job satisfaction, and employee turnover intentions).

Design/methodology/approach

The authors gathered field data from individuals working in the higher education sector of Jammu and Kashmir to test the proposed study paradigm. A total of 550 respondents reported their perceptions of workplace incivility, emotional exhaustion, and job-related outcomes (job stress, job satisfaction, and employee turnover intention) at Time 1 in the Kashmir division and Time 2 in the Jammu division of Jammu and Kashmir via a two-wave data collection design.

Findings

The findings supported the hypothesized relationships, demonstrating that emotional exhaustion acts as a mediator between workplace incivility and employee job outcomes (job stress, employee job satisfaction, and employee intention to leave).

Practical implications

The findings of this research study will assist organizations and practitioners in comprehending the implications of workplace incivility and emotional exhaustion, as well as how they positively impact job-related outcomes (employee job stress, turnover intention), and negatively on job satisfaction.

Originality/value

This study adds to existing knowledge on COR theory by suggesting workplace incivility as a stressor and also testing emotional exhaustion as a defense mechanism for determining the effect of workplace incivility on employee job outcomes.

Details

Journal of Organizational Effectiveness: People and Performance, vol. 10 no. 2
Type: Research Article
ISSN: 2051-6614

Keywords

Article
Publication date: 1 November 2023

Zahoor Ahmad Parray, Junaid Iqbal and Rashid Mushtaq

The primary goal of this research is to examine how corporate social responsibility (CSR) affects customer engagement (CE) and how corporate reputation (CR) serves as a mediator…

Abstract

Purpose

The primary goal of this research is to examine how corporate social responsibility (CSR) affects customer engagement (CE) and how corporate reputation (CR) serves as a mediator of this relationship.

Design/methodology/approach

The data for this paper were gathered from the customers who were actively engaging with the banks. A total of 445 questionnaires were circulated among the respondents, 397 were selected after removing the faulty ones, which estimates around 90% of the total questionnaire distributed. Customers were asked to record their perceptions regarding CSR, CR and CE. The data were collected from both the regions of Jammu and Kashmir simultaneously.

Findings

The findings reinforced the hypothesized associations, indicating that CR successfully and positively mediates the association between CSR and CE.

Practical implications

The outcomes of this study will assist top managers in the organization in understanding the significant impact of CSR and CR, as well as how they both positively impact the CE.

Originality/value

This research introduces a fresh dimension by exploring the influence of cognitive biases in shaping the relationship between CSR efforts, reputation-building and customer engagement. Through this innovative approach, the study establishes a more intricate and comprehensive link between theories, shedding light on the underlying mechanisms that drive these dynamics within the realm of corporate behavior and consumer perceptions.

Details

Corporate Communications: An International Journal, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 1356-3289

Keywords

1 – 10 of 91