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Article
Publication date: 16 February 2023

Martin Carlsson-Wall, Kai DeMott and Hamza Ali

In this paper, the authors empirically and theoretically analyze the scaling and control of talent development to highlight an important part of commercialization in football…

2674

Abstract

Purpose

In this paper, the authors empirically and theoretically analyze the scaling and control of talent development to highlight an important part of commercialization in football clubs, especially in the light of a growing transfer market.

Design/methodology/approach

Conducting a single case study of a Swedish football club, the authors adapt a view of the club as a “high-intensity” organization (Alvesson and Kärreman, 2004), one that inherently relies on strong identification of employees and the fostering of talent. This view allows us to detail the importance of both socio-ideological and technocratic forms of control involved in the talent development process.

Findings

The authors show how socio-ideological and technocratic forms of control were combined to establish the football club as a “talent factory” in the league, as well as the corresponding challenges when scaling talent development activities and how these challenges were handled. In doing so, the authors contribute to the broader accounting literature on talent- and human resource management, as the authors provide an example of how football clubs may commercialize without necessarily violating their fundamental sports values.

Originality/value

Talent management has mainly been studied in terms of increasing player wages and a focus on the cost of talent. As opposed to these perspectives, the authors highlight the revenue potential in developing players in the light of a growing transfer market and the relevance of talent development for the commercialization of football clubs.

Details

Accounting, Auditing & Accountability Journal, vol. 37 no. 2
Type: Research Article
ISSN: 0951-3574

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Article
Publication date: 31 May 2021

Farid Terbouche, Ali Hamza and Smail Gabi

The purpose of this paper is the analysis of the dissipation of pore water pressures in the core of an earth dam, under the effect of water level fluctuations in the reservoir…

83

Abstract

Purpose

The purpose of this paper is the analysis of the dissipation of pore water pressures in the core of an earth dam, under the effect of water level fluctuations in the reservoir under operating conditions, taking into account the partial emptying and filling.

Design/methodology/approach

The Taksebt Dam, Tizi-Ouzou, Algeria was chosen as a case study, using a two-dimensional transient finite element numerical model. The GeoStudio calculation software is used through the SEEP/W. The latter takes into account the flow in the saturated and unsaturated zone, the formulation of SEEP/W allows the analysis of the dissipation of pore water pressures in the dyke. Starting from the maximum level of the reservoir, at least one cycle of partial emptying-filling was modelled over an eight-year operating period from 2011 to 2019. The input variables were the water level variation curve, material properties and boundary conditions.

Findings

It can be concluded that the numerical results obtained from the simulation model on the different points studied, namely, the pore water pressures are satisfactory as long as they are close to those recorded in the field by the pore pressure cells with an average error not exceeding 10% except for some measurements where the error is 20%. When the water level in the reservoir varies, the pore water pressures vary and their behaviour follows these fluctuations. Some points in the dam are affected by negative pore water pressures. No abnormal situations have been detected pore water pressures.

Originality/value

The numerical results of the simulation are analysed and validated against actual pore pressure cell measurements under operating conditions.

Details

World Journal of Engineering, vol. 19 no. 4
Type: Research Article
ISSN: 1708-5284

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Article
Publication date: 11 February 2021

M. Ali Hamza, Saqib Rehman, Adnan Sarwar and Komal Nadeem Choudhary

The organizational success to achieve and maintain its competitiveness is ascribed in the effectiveness of its knowledge management (KM) system, which depends on its employees’…

1184

Abstract

Purpose

The organizational success to achieve and maintain its competitiveness is ascribed in the effectiveness of its knowledge management (KM) system, which depends on its employees’ impetus to exhibit knowledge sharing behavior. When an employee hides knowledge, an organization somewhat loses its part of knowledge, which causes loss to the organization eventually. This study aims to examine the impact of personality traits and one’s ethnicity on knowledge hiding behavior (KHB) by focusing on mediating role of team member exchange (TMX).

Design/methodology/approach

A total 308 questionnaires are collected from the public sector organizations (Livestock and Dairy Development Department, Punjab, Pakistan), out of them 300 are used in the analysis. Through Google e-survey form, cross-sectional data using convenience sampling are collected from the Gazetted officers (managerial level) of the department.

Findings

The paper provides empirical insights about three personality traits, i.e. openness, conscientiousness and neuroticism, and ethnicity have positive relation with KHB, whereas TMX as a mediator converts this positive relation into negative. Remaining two personality traits, i.e. extraversion and agreeableness, have negative relation with KHB, whereas TMX as a mediator strengthens this negative relationship with KHB.

Research limitations/implications

The broad context of research and large number of items made it difficult to collect the responses. In future studies, 50 items of big five should be replaced with mini scale. Empirical explanation of the relation between ethnicity and knowledge hiding is an addition to body of knowledge in general, particularly in context of Pakistan.

Practical implications

This study has the power to help managers in managing their team members and to understand what kind of personality and social group involvements promote knowledge sharing culture within the organization.

Originality/value

To broaden the understanding of KM domain, this study adds value in the relationship between big five personality traits, ethnicity and KHB of employees by finding the mediating effect of TMX in the context of Pakistani organizations.

Details

VINE Journal of Information and Knowledge Management Systems, vol. 53 no. 1
Type: Research Article
ISSN: 2059-5891

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Article
Publication date: 25 November 2024

Nehad Abid Allah Hamza, Amal Hussein Oliwie, Nejla Mahjoub Said, Isam Abed and Qusay Rasheed

This study aims to investigate experimentally and numerically the thermal analysis of a wavy diverging-converging corrugated enclosure, partitioned into two parts under the effect…

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Abstract

Purpose

This study aims to investigate experimentally and numerically the thermal analysis of a wavy diverging-converging corrugated enclosure, partitioned into two parts under the effect of magnetohydrodynamic (MHD) natural convection. The left part was filled with Al2O3/C2H6O2 nanofluid, while the right part was Al2O3/C2H6O2 saturated by a porous medium, featuring a corrugated cylinder at the center. This system is relevant to many engineering applications. Key factors affecting thermal performance, such as nanofluid volume fraction, Darcy number, Hartmann number, inclination angle of MHD and Rayleigh number, were analyzed. This study evaluated the impact of these parameters on stream function, average Nusselt number and isothermal lines under three heat source scenarios: heating the corrugated cylinder, heating the magnetic source and heating the nanofluid, porous media and corrugated walls.

Design/methodology/approach

The main governing equations for the nanofluid flow are mass, momentum and heat transfer, while the porous media are modeled using the Darcy–Brinkmann model. These governing equations are transformed into a dimensionless form and solved numerically using COMSOL 6.0 based on the finite-element method. Dynamic viscosity, density and thermal conductivity equations are used to calculate the properties of the nanofluid at different volume concentrations.

Findings

The results showed that increasing the Rayleigh number (Ra) and Darcy number (Da) increased the Nusselt number by 55%, indicating enhanced heat transfer. A vertical magnetic source (γ = 90°) further improved thermal performance. Conversely, thermal performance decreased with increasing Hartmann number (Ha). The highest Nusselt number was observed when the heat source was applied to the corrugated cylinder, followed by the right side with nanofluid–porous contact and was lowest for the left side with nanofluid contact. Experimental data demonstrated that the presence of a magnetic field can significantly increase the temperature, thereby enhancing heat transfer by natural convection, particularly when the heat source is applied in the region of nanofluid–porous contact.

Originality/value

The primary originality of this work lies in the use of a novel design featuring a diverging-converging structure with a wavy wall. In addition, it uses two types of fluids simultaneously, dividing the enclosure into two sections: the right side contains nanofluid mixed with a porous medium, while the left side is filled with nanofluid only. The system also includes a corrugated cylinder at its center with four undulations. The position of the heat source significantly influences heat dissipation. Therefore, three different positions were examined: heating the cylinder at a constant temperature, heating the left side of the enclosure and heating the right side.

Details

International Journal of Numerical Methods for Heat & Fluid Flow, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 0961-5539

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Article
Publication date: 1 August 1998

Ahmed Hamza H. Ali, Koki Kishinami, Yutaka Hanaoka and Jun Suzuki

A two‐dimensional numerical study was carried out to investigate laminar forced‐convection heat transfer characteristics of air flow in a two parallel plate channel with offset…

610

Abstract

A two‐dimensional numerical study was carried out to investigate laminar forced‐convection heat transfer characteristics of air flow in a two parallel plate channel with offset plates and heated by a radiation heat flux. The SIMPLE method was used for the numerical prediction of the flow and thermal fields. The flow field temperature boundary conditions were obtained by applying the energy balance equation to boundary elements. The ray tracing technique was used to obtain the net absorbed radiation fractions in the boundary elements. The numerical results were validated with measured temperature values and experimentally calculated values of local Nusselt number (Nux), and a reasonable agreement was shown. Then the numerical simulation was used to study effects of design parameters on the convective heat transfer coefficient. It was found that in Re numbers from 650 to 2,550, the optimum spacing of offset plates relative to the nearest channel wall was around one third of the channel height. Also, the optimum offset plates’ numbers can be calculated based on one offset plate length being equal to one and a half times the channel hydraulic diameter. A correlation of average Nusselt number between the flowing air and the offset plates was obtained as follows; —Nu = 1.81 Re 0.352Pr1/3(Dh/l)1/2.

Details

International Journal of Numerical Methods for Heat & Fluid Flow, vol. 8 no. 5
Type: Research Article
ISSN: 0961-5539

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Article
Publication date: 1 September 1998

Koki Kishinami, Hakaru Saito, Jun Suzuki, Ahmed Hamza H. Ali, Hisashi Umeki and Noriyuki Kitano

Combined forced and free laminar convective heat transfer on a vertical plate with a backward‐facing step has been studied numerically and experimentally, considering the effects…

375

Abstract

Combined forced and free laminar convective heat transfer on a vertical plate with a backward‐facing step has been studied numerically and experimentally, considering the effects of the interaction between the buoyancy and inertia forces which play a significant role in this phenomenon with the step‐geometry factor of d/L. The convective heat transfer behavior in connection with the reattachment and recirculation flows appearing in the step region has been investigated based on the numerical calculations and Mach‐Zehnder interferometer measurement under the wide range of the thermal condition. The behaviors of local Nusselt number NuL, velocity and temperature boundary layers and streamline fields in the recirculating region have been discussed for the various parameters of Grashof number GrL, Reynolds number ReL and the geometry factor d/L. The characteristic behavior of this convection heat transfer, including the vortex flow mode in the recirculating region and the unstable fluctuating mode near the reattaching point appearing at the specific condition, has been clarified numerically and experimentally by introducing the generalized coupling parameter GrL/ReL2 and geometry factor d/L.

Details

International Journal of Numerical Methods for Heat & Fluid Flow, vol. 8 no. 6
Type: Research Article
ISSN: 0961-5539

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Book part
Publication date: 1 March 2013

Thomas Olesen

This chapter offers a symbolic perspective on the Egyptian Revolution. It does so by analyzing the transformation of Khaled Said, a 28-year-old Egyptian man beaten to death by…

Abstract

This chapter offers a symbolic perspective on the Egyptian Revolution. It does so by analyzing the transformation of Khaled Said, a 28-year-old Egyptian man beaten to death by police on June 6, 2010, into a key visual injustice symbol. Activists were motivated by a horrifying cell phone photograph of Said taken by his family at the morgue and uploaded on the web. Although the postmortem photograph had a powerful emotional impact in itself, the transformation of Said from local/particular incident to injustice symbol with society-wide repercussions cannot be explained by its mere availability in the public sphere. The transformation required intervention and appropriation by activists who creatively and strategically universalized the case, linking it with existing injustice frames in Egypt. This chapter analyzes this interplay between photographs, activism, and society in two steps. The first provides an analysis of the genesis of the Said symbol and identifies three levels of agency in its formation. The second step analyzes the process through which Said was infused with injustice meanings by activists. Providing the first systematic analysis of Said from a social movement perspective, the chapter draws on several data sources that are subjected to interpretive analysis: visual material available on the internet, Facebook pages, and interviews with and accounts by key activists. And it calls for more attention to photographs and symbols in the analysis of activism and points to several historical and present cases with relevance for such an approach.

Details

Advances in the Visual Analysis of Social Movements
Type: Book
ISBN: 978-1-78190-636-1

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Article
Publication date: 22 January 2025

Adeola John Omowaye, Adedayo Naheem Adesina, Taoqer Ayobami Aleem, Joshua Ayodeji Omowaye and Samuel Olukayode Ayinde

The purpose of this study is to investigate the impact of Arrhenius kinetics on hydromagnetic free convection of an electrically conducting fluid flowing past a vertically…

2

Abstract

Purpose

The purpose of this study is to investigate the impact of Arrhenius kinetics on hydromagnetic free convection of an electrically conducting fluid flowing past a vertically stretched sheet maintained at a constant temperature, considering viscous dissipation. In this study, the understanding of the Biot number is essential for comprehending and enhancing heat transfer processes in a flow. Mastering this concept is crucial for the efficient design and management of various industrial and natural systems. The effect of Newtonian heating is accurately addressed by adjusting the traditional temperature boundary condition.

Design/methodology/approach

The presiding inconsistent Partial differential equations are contrasted to ordinary differential equations by similitude changes and the solutions are completed numerically by fourth-order Runge-Kutta (RK-4) and shooting procedures. Tables and graphs feature vividly in annotating the outcomes of changing parameters on the flow.

Findings

Notably, the Biot number significantly impacts temperature gradients and distribution, which subsequently affect the flow’s velocity and thermal characteristics; that is, velocity and temperature contours increase directly to an upsurge in the Biot number. Contrasting with existing work, a perfect harmony is experienced. Arrhenius kinetics are essential for predicting and managing fluid flow behaviour in systems where reactions are sensitive to temperature. Grasping this relationship helps engineers and scientists enhance process efficiency, ensure safety and optimize fluid-based systems. Similarly, Newtonian heating significantly impacts fluid flow by affecting temperature distribution, viscosity, buoyancy-driven flows and flow stability. Mastering the control of this heating process is vital in both natural and engineered fluid systems. Technical applications of this research include variation cooling and atomic power generation refrigeration.

Originality/value

The distinguishing quality of this research lies in the scrutiny of Arrhenius steady hydromagnetic heat transfer to natural convection flow in a stretching upright sheet: viscous dissipation and Newtonian heating. To best of the authors’ understanding, a problem like this has not been considered. The findings in this work will give useful information to scientists and engineers.

Details

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

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Article
Publication date: 14 June 2023

Manikandamaharaj T.S. and Jaffar Ali B.M.

Effective performance of a direct ethanol fuel cell (FC) stack depends on the satisfactory operation of its individual cells where it is always challenging to manage the…

147

Abstract

Purpose

Effective performance of a direct ethanol fuel cell (FC) stack depends on the satisfactory operation of its individual cells where it is always challenging to manage the temperature gradient, water flow and distribution of reactants. In that, the design of the bipolar fuel flow path plate plays a vital role in achieving the aforementioned parameters. Further, the bipolar plates contribute 80% of the weight and 30%–40% of its total cost. Aim of this study is to enhance the efficiency of fuel to energy conversion and to minimize the overall cost of production.

Design/methodology/approach

The authors have specifically designed, simulated and fabricated a standard 2.5 × 2.5 cm2 active area proton exchange membrane (PEM) FC flow path plate to study the performance by varying the flow fields in a single ladder, double ladder and interdigitated and varying channel geometries, namely, half curve, triangle and rectangle.

Findings

Using the 3D PEMFC model and visualizing the physical and electrochemical processes occurring during the operation of the FCs resulted in a better-performing flow path plate design. It is fabricated by using additive manufacturing technology. In addition, the assembly of the full cell with the designed flow path plate shows about an 11.44% reduction in total weight, which has a significant bearing on its total cost as well as specific energy density in the stack cell.

Originality/value

Simultaneous optimization of multiple flow path parameters being carried out for better performance is the hallmark of this study which resulted in enhanced energy density and reduced cost of device production.

Details

Rapid Prototyping Journal, vol. 29 no. 9
Type: Research Article
ISSN: 1355-2546

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Article
Publication date: 30 September 2024

Aqsa Jaleel and Muhammad Sarmad

How leaders’ empowerment impacts followers' job performance in learning organizations seeks much attention. Under the lens of self-determination theory, this research examines the…

167

Abstract

Purpose

How leaders’ empowerment impacts followers' job performance in learning organizations seeks much attention. Under the lens of self-determination theory, this research examines the mediating role of work-related curiosity between empowering leadership and job-crafting behaviors. Furthermore, by applying trait activation theory, this study aims to examine the moderating role of gender egalitarianism in the relationship between empowering leadership and work-related curiosity among teachers.

Design/methodology/approach

A time-lagged data from 310 teachers was collected. The quantitative research method under the deductive approach and positivism research philosophy was applied. The data was analyzed through the SPSS and structured equation modeling technique under SMART-PLS.

Findings

The results show that empowering leadership is positively related to job crafting dimensions. Simultaneously, work-related curiosity mediates these predictive relations. Moreover, low gender egalitarianism moderates empowering leadership and work-related curiosity.

Originality/value

Investigating the direct and indirect effects of empowering leadership on the dimensions of job crafting is scarce, especially in learning organizations with a low gender egalitarian culture. By using the self-determination theory, this study analyzed work-related curiosity as a mediating path between empowering leadership and job crafting. The cultural circumstances under empowering leadership are important for work-related curiosity. Finally, the moderating role of gender egalitarianism is established between empowering leadership and work-related curiosity in the unique context of an underdeveloped country, Pakistan. In addition, this study provides important theoretical and managerial implications for learning organizations for needful job crafting behaviors.

Details

The Learning Organization, vol. 31 no. 6
Type: Research Article
ISSN: 0969-6474

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