Jonathan Torres, Matthew Cole, Allen Owji, Zachary DeMastry and Ali P. Gordon
This paper aims to present the influences of several production variables on the mechanical properties of specimens manufactured using fused deposition modeling (FDM) with…
Abstract
Purpose
This paper aims to present the influences of several production variables on the mechanical properties of specimens manufactured using fused deposition modeling (FDM) with polylactic acid (PLA) as a media and relate the practical and experimental implications of these as related to stiffness, strength, ductility and generalized loading.
Design/methodology/approach
A two-factor-level Taguchi test matrix was defined to allow streamlined mechanical testing of several different fabrication settings using a reduced array of experiments. Specimens were manufactured and tested according to ASTM E8/D638 and E399/D5045 standards for tensile and fracture testing. After initial analysis of mechanical properties derived from mechanical tests, analysis of variance was used to infer optimized production variables for general use and for application/load-specific instances.
Findings
Production variables are determined to yield optimized mechanical properties under tensile and fracture-type loading as related to orientation of loading and fabrication.
Practical implications
The relation of production variables and their interactions and the manner in which they influence mechanical properties provide insight to the feasibility of using FDM for rapid manufacturing of components for experimental, commercial or consumer-level use.
Originality/value
This paper is the first report of research on the characterization of the mechanical properties of PLA coupons manufactured using FDM by the Taguchi method. The investigation is relevant both in commercial and consumer-level aspects, given both the currently increasing utilization of 3D printers for component production and the viability of PLA as a renewable, biocompatible material for use in structural applications.
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Sanna F. Siddiqui and Ali P. Gordon
Additive manufacturing (AM) studies on Inconel 718 (IN718) have focused on exploring its tensile and fatigue response. As IN718 is used in the propulsion and energy sector, the…
Abstract
Purpose
Additive manufacturing (AM) studies on Inconel 718 (IN718) have focused on exploring its tensile and fatigue response. As IN718 is used in the propulsion and energy sector, the impact of shearing is also critical to ensuring the durability of these components. As such, this study aims to explore the relation between build orientation on the shear cyclic response of direct metal laser sintered (DMLS) IN718.
Design/methodology/approach
IN718 torsion specimens were manufactured along six build orientations: (100)-X, (010)-Y, (001)-Z, (110)-XY45, (101)-XZ45 and (011)-YZ45, using the DMLS process. Torsional fatigue testing was performed on as-built specimens, from which fracture behavior, surface roughness, softening/hardening response and monotonic/cyclic shear torsional properties were assessed.
Findings
DMLS IN718 was found to exhibit transversely isotropic behavior. In terms of shear stress range and shear modulus, Z > (X, XY45, Y) > (XZ45, YZ45). Specimens cyclically hardened to stabilization and softened to fracture. In terms of torsional fatigue fracture response, the Z, XZ45 and YZ45 specimens exhibited crack initiation and propagation from internal defects, whereas cracks were found to initiate at the surface and propagate between and through build layers for the X, Y and XY45 specimens.
Originality/value
This study reports the torsional cyclic response and shear moduli exhibited by as-built DMLS IN718 manufactured along varying build orientations. The findings are applicable for researchers because of the wide use of IN718 in the gas turbine industry, and the current trend to replace conventional manufacturing with AM.
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Although the extant literature widely recognizes the impact of corporate culture on performance, such findings are either speculative or mostly based on US companies, thus may not…
Abstract
Although the extant literature widely recognizes the impact of corporate culture on performance, such findings are either speculative or mostly based on US companies, thus may not be generalisable to other national settings. In addition, while industry effect is considered in a few studies, its combined effect with other factors on performance has not been explored. This study modifies the existing model of corporate culture on performance by adding industry effect to the model. This is also the first study that tests such a relationship in a Middle East setting. Due to its unique culture, data collection in the Middle East region has been difficult if not impossible. More research in this region is needed since most of it is still in its infancy. This study investigates firms in Bahrain, the financial hub of the Arab World, to shed some insight onto this region. The results confirm a positive relation between Culture and performance and marginal industry effect between banks and hotels.
Zulqurnain Ali and Aqsa Mehreen
Leadership development practices develop future leaders for the organizations which are evidence for the proper utilization of organizational resources. The purpose of this paper…
Abstract
Purpose
Leadership development practices develop future leaders for the organizations which are evidence for the proper utilization of organizational resources. The purpose of this paper is to integrate succession planning into the job demands–resources (JD–R) model to predict individual performance.
Design/methodology/approach
In total, 239 participants were drawn from commercial banks located in a large city of Pakistan through a structured questionnaire. The proposed model was tested through structural equation modeling.
Findings
The results from 239 participants suggest that succession planning has a direct and indirect effect on engagement and employee performance through the JD–R model. Furthermore, job resources and engagement mediate the association between succession planning and employee performance.
Research limitations/implications
The present study employed a cross-sectional approach, and all constructs were answered on a self-report questionnaire. Thus, the findings should be validated through a longitudinal design by employing a more objective construct.
Practical implications
The banks should adopt proactive succession system to improve individual and organizational performance. Succession planning helps the banks to reduce recruitment cost and promote internal hiring. This study supports the managerial decisions making by mobilizing skilled and talented employees in the sudden resignation of a bank employee.
Social implications
Succession planning seems an important development factor that directly improves employees’ well-being through the JD–R model.
Originality/value
The present study demonstrates the integration of the JD–R model into succession planning.
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In the last four years, since Volume I of this Bibliography first appeared, there has been an explosion of literature in all the main functional areas of business. This wealth of…
Abstract
In the last four years, since Volume I of this Bibliography first appeared, there has been an explosion of literature in all the main functional areas of business. This wealth of material poses problems for the researcher in management studies — and, of course, for the librarian: uncovering what has been written in any one area is not an easy task. This volume aims to help the librarian and the researcher overcome some of the immediate problems of identification of material. It is an annotated bibliography of management, drawing on the wide variety of literature produced by MCB University Press. Over the last four years, MCB University Press has produced an extensive range of books and serial publications covering most of the established and many of the developing areas of management. This volume, in conjunction with Volume I, provides a guide to all the material published so far.
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Mohd Mohid Rahmat, Siti Hajar Asmah Ali and Norman Mohd Saleh
This study aims to examine the effect of the auditor-client relationship (ACR) on related party transaction (RPT) types of disclosure, either RPT-efficient or RPT-conflict. This…
Abstract
Purpose
This study aims to examine the effect of the auditor-client relationship (ACR) on related party transaction (RPT) types of disclosure, either RPT-efficient or RPT-conflict. This study also examines whether family controlling shareholders (FCS) negatively affect the ACR in RPT types of disclosure.
Design/methodology/approach
This study uses multivariate regression on 2,203 year-observations of companies listed in Malaysia during the period 2014–2017.
Findings
This study finds weak evidence that auditors can mitigate companies’ RPT type (RPT-efficient and RPT-conflict) disclosure while maintaining a close ACR. However, an interaction between FCS and ACR reduces the RPT-conflict disclosure. Additionally, the Big 4 auditors slightly increase the RPT-conflict disclosure, however, the relationships are inversed if the close ACR involves the FCS. The Big 4 auditors also increase RPT-efficient disclosure although in a close ACR with FCS. Meanwhile, an interaction between non-Big 4 auditors and FCS in close ACR reduces both types of RPT disclosures.
Research limitations/implications
The findings suggest that a close relationship between auditors and clients in firms with significant family control could compromise auditor’s skepticism. The FCS can easily influence the auditors to agree with the ways they treat the RPT disclosure. Therefore, policymakers may have to revisit auditors’ rotation policies in Malaysia, especially those involving FCS.
Originality/value
Trust, familiarity and future fee dependency are significant threats to auditor independence in a close ACR. This study contributes to the literature by examining the effect of a close ACR on RPT types of disclosure from a network theory perspective.
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Ali Saleh Alshomrani, Sapna Pandit, Abdullah K. Alzahrani, Metib Said Alghamdi and Ram Jiwari
The main purpose of this work is the development of a numerical algorithm based on modified cubic trigonometric B-spline functions for computational modelling of hyperbolic-type…
Abstract
Purpose
The main purpose of this work is the development of a numerical algorithm based on modified cubic trigonometric B-spline functions for computational modelling of hyperbolic-type wave equations. These types of equations describe a variety of physical models in the vibrations of structures, nonlinear optics, quantum field theory and solid-state physics, etc.
Design/methodology/approach
Dirichlet boundary conditions cannot be handled easily by cubic trigonometric B-spline functions. Then, a modification is made in cubic trigonometric B-spline functions to handle the Dirichlet boundary conditions and a numerical algorithm is developed. The proposed algorithm reduced the hyperbolic-type wave equations into a system of first-order ordinary differential equations (ODEs) in time variable. Then, stability-preserving SSP-RK54 scheme and the Thomas algorithm are used to solve the obtained system. The stability of the algorithm is also discussed.
Findings
A different technique based on modified cubic trigonometric B-spline functions is proposed which is quite different from the schemes developed (Abbas et al., 2014; Nazir et al., 2016) and depicts the computational modelling of hyperbolic-type wave equations.
Originality/value
To the best of the authors’ knowledge, this technique is novel for solving hyperbolic-type wave equations and the developed algorithm is free from quasi-linearization process and finite difference operators for time derivatives. This algorithm gives better results than the results discussed in literature (Dehghan and Shokri, 2008; Batiha et al., 2007; Mittal and Bhatia, 2013; Jiwari, 2015).
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This is a study of the social consequences of accounting controls over labour. This paper aims to examine the system of tasking used to control Indian indentured workers in the…
Abstract
Purpose
This is a study of the social consequences of accounting controls over labour. This paper aims to examine the system of tasking used to control Indian indentured workers in the historical context of Fijian sugar plantations during the British colonial period from 1879 to 1920.
Design/methodology/approach
Archival data consisting of documents from the Colonial Secretary’s Office, reports and related literature on Indian indentured labour were accessed from the National Archives of Fiji. In addition, documented accounts of the experiences of indentured labourers over the period of the study gave voice to the social costs of the indenture system, highlighting the social impact of accounting control systems.
Findings
Accounting and management controls were developed to extract surplus value from Indian labour. The practice of tasking was implemented in a plantation structure where indentured labourers were controlled hierarchically. This resulted in their exploitation and consequent economic, social and racial marginalisation.
Research limitations/implications
Like all historical research, our interpretation is limited by the availability of archival documents and the theoretical framework chosen to examine these documents.
Practical implications
The study promotes a better understanding of the practice and impact of accounting controls within a particular institutional setting, in this case the British colony of Fiji.
Social implications
By highlighting the social implications of accounting controls in their historical context, we alert corporations, government policy makers, accountants and workers to the socially damaging effects of exploitive management control systems.
Originality/value
The paper contributes to the growing body of literature highlighting the social effects of accounting control systems. It exposes the social costs borne by indentured workers employed on Fijian sugar plantations.
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Nurshahirah Abd Majid, Mohd Mohid Rahmat and Kamran Ahmed
This study aims to examine the ability of independent directors to discipline related-party transactions (RPTs) among listed companies in Malaysia. Firms typically appoint…
Abstract
Purpose
This study aims to examine the ability of independent directors to discipline related-party transactions (RPTs) among listed companies in Malaysia. Firms typically appoint independent directors individually, not as a group. However, board members are commonly viewed collectively as a group, and evidence of the abilities of individual directors is scarce.
Design/methodology/approach
The attributes of individual independent directors include accounting literacy, length of service, audit committee membership and active participation in board and audit committee meetings. The unit of analysis is the individual independent director. The final sample consists of 1,552 observations in 2017, and RPTs are categorized as either efficient or conflicting.
Findings
The study finds that the tenure of individual independent directors and active participation in board meetings affect the firm’s engagement in RPTs. However, the financial literacy, audit committee membership and attendance of independent directors at audit committee meetings do not affect the firm’s engagement in RPTs, either efficient or conflicting. Overall, this result offers limited support for the upper-echelon theory concerning the attributes of individual independent directors and RPTs.
Research limitations/implications
This study uses cross-sectional observations for 2017, which predates the COVID-19 pandemic. Thus, this study ignores the impact of restrictions in community mobility during the pandemic on the independent director’s ability to monitor the corporation. This circumstance may have implications for practice and merit further research.
Practical implications
The findings provide information for board nominating committees, regulators and policymakers that the capability of individual independent directors to fulfill their responsibilities is limited. The firm’s nominating committee must be very selective in nominating and appointing independent directors with appropriate competencies. Investors should choose companies that have reappointed the same independent directors for an extended period, as they may benefit from the experience in protecting investors’ interests.
Originality/value
This paper contributes novel evidence to upper-echelon theory literature on the association between independent directors and RPT types from the perspective of individual independent directors.
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Social movement scholarship convincingly highlights the importance of threats, political opportunities, prior social ties, ideological compatibility, and resources for coalition…
Abstract
Social movement scholarship convincingly highlights the importance of threats, political opportunities, prior social ties, ideological compatibility, and resources for coalition formation. Based on interviews with Palestinian, Israeli, and international activists involved in two transnational coalitions in Israel/Palestine, this chapter illustrates the emergence of transnational coalitions, particularly those that cross polarized ethno-national divides, depends not only on such facilitators, but also, and critically, on the belief that such diverse cooperation is strategic. I argue these unique coalitions intentionally formed with individuals and organizations situated in different national communities out of a strategic decision by the Palestinian initiators, given the closed political opportunity structure they faced domestically, to enlarge the scope of conflict by drawing in new people and communities who may have some leverage on the Israeli government. Consequently, this chapter also makes clear that partners in the Global South make intentional choices about who to partner with, and that the agency is not solely linked with their more privileged partners in the Global North (cf., Bob, 2001; Widener, 2007). Finally, it illustrates that coalition partners are recruited not only because of social ties, prior histories of interaction, ideological similarity, and shared organizational framing, but also due to key considerations including perceptions of what the ethno-national diversity, varying networks, and differing privileges make available.