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Article
Publication date: 23 July 2020

Ashraf Yahya, Syed M. Usman Ali and Muhammad Farhan Khan

Multilevel inverter (MLI) is an established design approach for inverter applications in medium-voltage and high-voltage range of applications. An asymmetric design synthesizes…

74

Abstract

Purpose

Multilevel inverter (MLI) is an established design approach for inverter applications in medium-voltage and high-voltage range of applications. An asymmetric design synthesizes multiple DC input voltage sources of unequal magnitudes to generate a high-quality staircase sinewave comprising a large number of steps or levels. However, the implications of using sources of unequal magnitudes results in the requirements of a large variety of inverter switches and higher magnitudes of the total blocking voltage (TBV) rating of the inverter, which increase the cost. The purpose of this study is to present a solution based on algorithms for establishing DC source magnitudes and other design parameters.

Design/methodology/approach

The approach used in this study is to develop algorithms that bring an asymmetric cascaded MLI (ACMLI) design close to symmetric design. This approach then reduces the variety of switch ratings and minimizes the TBV of the inverter. Thus, the benefits of both asymmetric design (generation of a large number of voltage levels in the output waveform) and symmetric design (modularity) are achieved. The proposed algorithms can be applied to a number of ACMLI topologies, including classical cascaded H-bridge (CHB). The effectiveness of the proposed algorithms is validated by simulation in Matlab-Simulink and experimental setup.

Findings

Two new algorithms are proposed that reduce the number of variety of switches to just three. The variety can further be reduced to two under a specified condition. The algorithms are compared with the existing ones, and the results are promising in minimizing the TBV rating of the inverter, which results in cost reduction as well. For a specific case of four CHBs, the proposed Algorithm-1 produced 27% and Algorithm-2 produced 53% higher levels. Moreover, the presented algorithms produced minimum values of the TBV and resulted in minimum cost of inverter.

Originality/value

The proposed algorithms are novel in structure and have achieved the targeted values of minimized switch variety and reduced TBV ratings. Due to less variety, the inverter achieves a near symmetric design, which enables to attain the added advantages of modularity and reduced difference of power sharing among the DC sources.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering , vol. 39 no. 4
Type: Research Article
ISSN: 0332-1649

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Article
Publication date: 28 November 2019

Syed Alamdar Ali Shah, Raditya Sukmana, Bayu Arie Fianto, Muhammad Ali Ahmad, Indrianawati Usman Usman and Waqar Ahmed Mallah

The purpose of this research is to examine the factors that affect brand satisfaction of a Muslim customer who is making purchases from selling outlets on social media.

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Abstract

Purpose

The purpose of this research is to examine the factors that affect brand satisfaction of a Muslim customer who is making purchases from selling outlets on social media.

Design/methodology/approach

The study used a new mechanism of sampling for research studies relating to social media which. Further, we used hierarchical regression to analyze the moderation effects of religiosity.

Findings

The authors’ findings suggest that religiosity has moderation effects on the relationship between halal social media and brand satisfaction of a Muslim customer and even higher moderation effects on relationship between customer engagement and brand satisfaction of a Muslim customer.

Research limitations/implications

The respondents of this research are completely unknown as the data has been collected from google-docs link sharing arrangement.

Practical implications

This study identifies factors that need to be focused on winning the brand loyalty of a Muslim customer.

Originality/value

This study provides a new sampling methodology to be used for the purpose of studies related to social media, which has been labeled as “social-media disguised snow ball sampling”. Further, this study is one of the few studies in the area of “halal social media”.

Details

Journal of Islamic Marketing, vol. 11 no. 6
Type: Research Article
ISSN: 1759-0833

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Article
Publication date: 29 April 2024

Muhammad Usman, Omaima Alqassimi, Asmaa Mohamed Ahmed Nusairi, Osman Abul and Syed Ali Hussain

This study aims to investigate the potential positive correlation between inclusive leadership and hotel frontline employees’ (FLEs) customer stewardship (CS) behavior, using the…

178

Abstract

Purpose

This study aims to investigate the potential positive correlation between inclusive leadership and hotel frontline employees’ (FLEs) customer stewardship (CS) behavior, using the conservation of resource theory as its foundation. It hypothesizes that role breadth self-efficacy (RBSE) acts as a mediating factor in this relationship, with employee conscientiousness serving as a significant moderating variable.

Design/methodology/approach

A time-lagged survey design was used, spanning over three rounds to collect data from 348 hotel FLEs and 42 managers. The analysis was conducted using structural equation modeling in Mplus version 8.6.

Findings

The study revealed a positive association between inclusive leadership and FLE CS, both directly and indirectly through RBSE. The results also showed that FLE conscientiousness moderated the direct link between inclusive leadership and RBSE, as well as the indirect link between inclusive leadership and FLE CS.

Practical implications

The evidence suggests that inclusive leadership behaviors among hospitality managers may elevate FLE CS behaviors, implying significant benefits for the success of hospitality organizations. Managers should focus on enhancing FLEs’ RBSE to further improve CS behaviors. In addition, by considering FLE conscientiousness, managers can craft targeted strategies to maximize the impact of inclusive leadership on CS behaviors.

Originality/value

This research contributes to the limited body of knowledge on the precursors of CS behavior by explaining both direct and indirect connections with inclusive leadership. Furthermore, it broadens the understanding of the conditions under which leadership most effectively shapes such behaviors.

Details

Journal of Asia Business Studies, vol. 18 no. 4
Type: Research Article
ISSN: 1558-7894

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Article
Publication date: 27 January 2021

Usman Yousaf, Syed Ahmad Ali, Muhammad Ahmed, Bushra Usman and Izba Sameer

Does entrepreneurship education (EE) really enhance participants’ self-efficacy and influence their attitudes towards starting new business? How does this attitudinal influence…

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Abstract

Purpose

Does entrepreneurship education (EE) really enhance participants’ self-efficacy and influence their attitudes towards starting new business? How does this attitudinal influence relate to participants’ entrepreneurial intention (EI)? Researchers and entrepreneurs alike have been probing into these questions with a view to capacitate the need of EE. This study aims to understand and operationalize a framework for entrepreneurship development by measuring participants’ intention towards entrepreneurship.

Design/methodology/approach

The study proposed a sequential mediation framework to examine the impact of EE on EI mediated by self-efficacy and attitude towards starting new business. Testing the hypotheses on data collected from 380 individuals, the study provided differentiated support for the theoretical propositions.

Findings

The findings of the study reflect that EE, self-efficacy and attitude towards starting new business contribute in establishing EI of audience. It was concluded that a sequential mediation exists between EE and EI by channelizing through entrepreneurs’ self-efficacy level that transforms an attitude towards starting a new business venture.

Research limitations/implications

The study has both theoretical and practical implications that will enable academicians, managers and practitioners to facilitate entrepreneurship by enhancing their knowledge database, skillset and developing a positive and constructive attitude among potential entrepreneurs.

Originality/value

The study inculcates a cultural lens and differentiates Pakistani context with other developing countries in Asia.

Details

International Journal of Innovation Science, vol. 13 no. 3
Type: Research Article
ISSN: 1757-2223

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Article
Publication date: 18 October 2022

Sehrish Timer and Syed Ali Raza

The purpose of this study is to investigate the nonlinear association between financial inclusion and inclusive economic growth (IEG) in developed economies. A Block of G7…

508

Abstract

Purpose

The purpose of this study is to investigate the nonlinear association between financial inclusion and inclusive economic growth (IEG) in developed economies. A Block of G7 countries (Germany, Japan, Canada, France, Italy, the UK and the US) are considered in this study.

Design/methodology/approach

For analysis, the authors have employed the “Panel Smooth Transition Regression model.” Annual data consists of the period from 1995 to 2019.

Findings

This research makes a unique contribution to literature with reference to G7 countries, being a pioneering attempt to apply the panel threshold regression model to analyze the relationship between financial inclusion and IEG by applying more rigorous and advanced econometric techniques.

Originality/value

The results indicate that total labor force available in a country, gross fixed capital formation and financial inclusion are positive and significant in lower regimes, but as it moves toward the higher regime, the labor force available in a country becomes less impactful. However, an increase has been observed in financial inclusion in the higher regime. The complete sample generally exhibits a positive yet significant relationship between financial inclusion and inclusive economic development.

Details

International Journal of Social Economics, vol. 50 no. 8
Type: Research Article
ISSN: 0306-8293

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Article
Publication date: 14 September 2022

Muhammad Hamid Murtza, Hafiz Muhammad Usman Khizar, Shahzad Ali Gill, Syed Muhammad Javed Iqbal and Saba Javaid

This qualitative study deals with the career longevity phenomenon in the hospitality sector of Pakistan and aimed at exploring the factors which become the reason for continuing…

321

Abstract

Purpose

This qualitative study deals with the career longevity phenomenon in the hospitality sector of Pakistan and aimed at exploring the factors which become the reason for continuing services in this sector for a longer period despite the prevailing perception of the short-term and unsatisfactory hospitality careers.

Design/methodology/approach

The study has taken up an interpretive social constructivism approach to carry out the research. The purposive sampling technique is used to solicit expert insights into the dynamics of the hospitality career. A thematic analysis was employed to identify the common themes, extract the meaning from the discussion patterns of the respondents, and outline viewpoints and ideas of the respondents.

Findings

The findings of the study are discussed at three levels of career, i.e. entry level, development level, and consolidation level. Long careers in the hospitality sector are a product of dedication and commitment to the job, professionalism, variety, complexity of the job, and healthy relationship with coworkers, supervisors, and guests.

Originality/value

The study links the belief of belonging and socialization attributes to the retention of employees in the hospitality sector jobs. Secondly, the study uses a qualitative approach to provide a diverse perspective of employee–industry loyalty rather than employee–organization loyalty. Thirdly, the study brings forth practical implications for personnel managers in the hospitality sector and proposes that the management should systematically stimulate the socialization of the workers to hold the talent despite providing workers with the opportunity to join another sector. Finally, the study informs about research limitations and directions for future research.

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Article
Publication date: 6 July 2020

Imran Hameed, Zeeshan Ahmed Bhatti, Muhammad Asif Khan and Sumaiya Syed

This study aims to examine the moderated-mediation effects of employees’ Islamic work ethic (IWE) on their promotive and prohibitive forms of constructive voice behaviors through…

685

Abstract

Purpose

This study aims to examine the moderated-mediation effects of employees’ Islamic work ethic (IWE) on their promotive and prohibitive forms of constructive voice behaviors through the integrated frameworks of social identity theory and self-consistency theory.

Design/methodology/approach

Using two-source data collection from employees and supervisors, data were collected from 217 participants working in various companies in the Kingdom of Saudi Arabia. After initial data screening, a confirmatory factor analysis was conducted to test for the factorial validity of the used measures with AMOS. The hypothesized relationships were tested in the PROCESS macro for SPSS.

Findings

The results of this study supported the integration of social identity theory with self-consistency theory in explaining the indirect effects of employees’ IWE on their promotive and prohibitive forms of constructive voice behaviors through the mediation of moral identity. Furthermore, this study also indicated that the indirect effect was conditional on the employees’ perceptions of perceived voice opportunity, which significantly moderated the relationship between their moral identity and their prohibitive voice. However, no such effect was recorded for promotive voice.

Originality/value

This study is the first that explains how and when employees’ IWE leads them to exhibit promotive and prohibitive voice behaviors through the mediation of moral identity and the moderation of perceived voice opportunity. Thus, this study contributes to the IWE, moral identity and employee voice literature by addressing questions with useful theoretical and managerial implications for employees’ promotive and prohibitive forms of constructive voice behaviors in the workplace.

Details

International Journal of Islamic and Middle Eastern Finance and Management, vol. 13 no. 4
Type: Research Article
ISSN: 1753-8394

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Article
Publication date: 3 February 2021

Farman Ali, Man Wang, Khalil Jebran and Syed Tauseef Ali

The purpose of this paper is to explore how multiple facets of board diversity influence technical efficiency (TE) and total factor productivity (TFP).

1940

Abstract

Purpose

The purpose of this paper is to explore how multiple facets of board diversity influence technical efficiency (TE) and total factor productivity (TFP).

Design/methodology/approach

The authors measure board diversity in two dimensions: relation-related dimension (age and gender) and task-related dimension (tenure, education and expertise). The authors use a balanced panel data of 806 nonfinancial Chinese firms over the period 2009–2017. The authors use a two-stage approach for analysis. In the first stage, the authors use a non-parametric frontier approach to calculate the TE and factor productivity scores. In the second stage, the authors regressed these scores on board diversity attributes (relation-related diversity and task-related diversity).

Findings

By using tobit regression and two-step system GMM, the authors find that board diversity improves TE and TFP. The authors’ analyses illustrate that a higher diversity on corporate board (in terms of age, gender, tenure, education and expertise) positively influence firm efficiency.

Practical implications

The findings have important implications for policymakers. The findings suggest that regulators should devise policies to encourage board diversity. Because a diverse board can bring knowledge, skills, abilities, expertise and experience of diverse group members, which will ultimately enhance a firm’s efficiency. Especially, in the emerging markets (such as China), there is still a need for standard governance mechanisms; therefore, the authors suggest that policymakers should develop regulations and promote diversity of directors as one of the factors for improving the governance mechanisms, which will ultimately improve firms productivity.

Originality/value

Prior studies mostly considered only one dimension (such as gender) of diversity and, therefore, have overlooked how other dimensions influence firms. The authors consider several dimensions of diversity and quantify them into relation-related (age and gender) and task-related (tenure, education and expertise) attributes and show how they influence firms’ efficiency. To the best of the authors’ knowledge, this is the first study to comprehensively investigate how several facets of diversity influence a firm’s TE and TFP.

Details

Corporate Governance: The International Journal of Business in Society, vol. 21 no. 4
Type: Research Article
ISSN: 1472-0701

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Article
Publication date: 13 November 2020

Xiao-Yu Xu, Syed Muhammad Usman Tayyab, Fang-Kai Chang and Kai Zhao

This study elicits the critical attributes, consequences and values associated with the purchasing process in the context of cross-border e-commerce (CBEC). The purpose is to…

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Abstract

Purpose

This study elicits the critical attributes, consequences and values associated with the purchasing process in the context of cross-border e-commerce (CBEC). The purpose is to provide a better understanding of the fundamental factors that determine consumer values in CBEC.

Design/methodology/approach

The study applies the means-end-chain theory and soft-laddering techniques to interview 60 CBEC consumers to construct an implication matrix and a hierarchical value map (HVM) of the consumer purchasing process, consisting of attribute-consequence-value (A-C-V) paths.

Findings

By analyzing the significant linkages, elements, ladders and chains in the HVM, four dominant A-C-V paths were identified: economic-driven, efficiency-driven, progress-driven and quality-driven paths.

Research limitations/implications

This study included only Chinese CBEC buyers. This limitation might affect the generalizability of the conclusions as culture, purchase habits and economic development differ between China and other countries.

Practical implications

The results of this study provide CBEC practitioners an understanding of the consumer purchasing process and how consumer values are associated with platform characteristics. Thus, the results aid practitioners in allocating resources and developing CBEC platforms in an appropriate manner and direction.

Originality/value

This study sheds lights on the emerging phenomenon of CBEC. By applying the means-end-chain approach, the study provides a comprehensive HVM for interpreting the consumer online purchasing process in this novel context. By illustrating the dominant paths, this research provides deeper theoretical insights into the specific focuses of CBEC consumer purchasing.

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Article
Publication date: 25 February 2020

Shahid Ali, Junrui Zhang, Muhammad Usman, Muhammad Kaleem Khan, Farman Ullah Khan and Muhammad Abubakkar Siddique

This study aims to investigate the question concerning whether tournament incentives motivate chief executive officers (CEOs) to be socially responsible.

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Abstract

Purpose

This study aims to investigate the question concerning whether tournament incentives motivate chief executive officers (CEOs) to be socially responsible.

Design/methodology/approach

Data from all A-share Chinese companies listed on the Shanghai and Shenzhen stock exchanges for the period from 2010 to 2015 are used. To draw inferences from the data, ordinary least squares (OLS) regression and cluster OLS are used as a baseline methodology. To control for the possible issue of endogeneity, firm-fixed-effects regression, two-stage least squares regression and propensity score matching are used.

Findings

A reliable evidence is found that tournament incentives motivate CEOs to be more socially responsible. Additional analysis reveals that the positive effect of CEO tournament incentives on corporate social responsibility performance (CSRP) is more pronounced in state-owned firms than it is in non-state-owned firms. The study’s findings are consistent with tournament theory and the conventional wisdom hypothesis, which proposes that better incentives lead to competitiveness, which improves financial and social performance.

Practical implications

The study’s findings have implications for companies and regulators who wish to enhance CSRP by giving tournament incentives to top managers. Investment in social responsibility may reduce the conflict between executives and employees and improve the corporate culture.

Originality/value

This study contributes to the existing literature by providing the first evidence that CEOs’ tournament incentives play a vital role in CSRP. The study’s findings contribute to tournament theory.

Details

Managerial Auditing Journal, vol. 35 no. 5
Type: Research Article
ISSN: 0268-6902

Keywords

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