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Article
Publication date: 5 October 2018

Amir Norouzzadeh, Reza Ansari and Hessam Rouhi

It has been revealed that application of the differential form of Eringen’s nonlocal elasticity theory to some cases (e.g. cantilevers) leads to paradoxical results, and recourse…

Abstract

Purpose

It has been revealed that application of the differential form of Eringen’s nonlocal elasticity theory to some cases (e.g. cantilevers) leads to paradoxical results, and recourse must be made to the integral version of Eringen’s nonlocal model. The purpose of this paper, within the framework of integral form of Eringen’s nonlocal theory, is to study the bending behavior of nanoscale plates with various boundary conditions using the isogeometric analysis (IGA).

Design/methodology/approach

The shear deformation effect is taken into account according to the Mindlin plate theory, and the minimum total potential energy principle is utilized in order to derive the governing equations. The relations are obtained in the matrix-vector form which can be easily employed in IGA or finite element analysis. For the comparison purpose, the governing equations are also derived based on the differential nonlocal model and are then solved via IGA. Comparisons are made between the predictions of integral nonlocal model, differential nonlocal model and local (classical) model.

Findings

The bending analysis of nanoplates under some kinds of edge supports indicates that using the differential model leads to paradoxical results (decreasing the maximum deflection with increasing the nonlocal parameter), whereas the results of integral model are consistent.

Originality/value

A new nonlocal formulation is developed for the IGA of Mindlin nanoplates. The nonlocal effects are captured based on the integral model of nonlocal elasticity. The formulation is developed in matrix-vector form which can be readily used in finite element method. Comparisons are made between the results of differential and integral models for the bending problem. The proposed integral model is capable of resolving the paradox appeared in the results of differential model.

Details

Multidiscipline Modeling in Materials and Structures, vol. 14 no. 5
Type: Research Article
ISSN: 1573-6105

Keywords

Article
Publication date: 19 August 2019

Amir Norouzzadeh, Mohammad Faraji Oskouie, Reza Ansari and Hessam Rouhi

This paper aims to combine Eringen’s micromorphic and nonlocal theories and thus develop a comprehensive size-dependent beam model capable of capturing the effects of…

Abstract

Purpose

This paper aims to combine Eringen’s micromorphic and nonlocal theories and thus develop a comprehensive size-dependent beam model capable of capturing the effects of micro-rotational/stretch/shear degrees of freedom of material particles and nonlocality simultaneously.

Design/methodology/approach

To consider nonlocal influences, both integral (original) and differential versions of Eringen’s nonlocal theory are used. Accordingly, integral nonlocal-micromorphic and differential nonlocal-micromorphic beam models are formulated using matrix-vector relations, which are suitable for implementing in numerical approaches. A finite element (FE) formulation is also provided to solve the obtained equilibrium equations in the variational form. Timoshenko micro-/nano-beams with different boundary conditions are selected as the problem under study whose static bending is addressed.

Findings

It was shown that the paradox related to the clamped-free beam is resolved by the present integral nonlocal-micromorphic model. It was also indicated that the nonlocal effect captured by the integral model is more pronounced than that by its differential counterpart. Moreover, it was revealed that by the present approach, the softening and hardening effects, respectively, originated from the nonlocal and micromorphic theories can be considered simultaneously.

Originality/value

Developing a hybrid size-dependent Timoshenko beam model including micromorphic and nonlocal effects. Considering the nonlocal effect based on both Eringen’s integral and differential models proposing an FE approach to solve the bending problem, and resolving the paradox related to nanocantilever.

Details

Engineering Computations, vol. 37 no. 2
Type: Research Article
ISSN: 0264-4401

Keywords

Book part
Publication date: 11 April 2019

Trin Thananusak and Shaz Ansari

The authors explore the emergence of altmetrics and Open Access (OA) publishing and discuss why their adoption in the management field lags behind other fields such as life…

Abstract

The authors explore the emergence of altmetrics and Open Access (OA) publishing and discuss why their adoption in the management field lags behind other fields such as life sciences. The authors draw on the status literature to discuss the knowledge production and consumption underpinned by the ‘Impact Factor’ metric and high-status ‘Toll Access’ journals and their implications. The authors explain the rise of altmetrics and OA publishing and their implications on the production and consumption of knowledge. The authors then examine the current situation, challenges and offer reflections on the management field’s progression towards a more open research regime in the digital era.

Details

The Production of Managerial Knowledge and Organizational Theory: New Approaches to Writing, Producing and Consuming Theory
Type: Book
ISBN: 978-1-78769-183-4

Keywords

Article
Publication date: 1 January 1993

Khalid F. Alotaibi, Stanley E. Fawcett and Laura Birou

Increasing competitive pressure over the past 20 years has forced many companies to re‐evaluate their value‐added systems. This re‐evaluation has greatly amplified the managerial…

Abstract

Increasing competitive pressure over the past 20 years has forced many companies to re‐evaluate their value‐added systems. This re‐evaluation has greatly amplified the managerial attention focused on purchasing. Indeed, many firms have begun to emphasize purchasing in their attempts to improve their competitive positions. Two advanced sourcing practices have been particularly important: global and JIT sourcing. This paper: 1) reviews the literature pertaining to these two sourcing practices, 2) considers potential competitive impact, 3) explores issues of compatibility, and 4) presents future research directions.

Details

International Journal of Commerce and Management, vol. 3 no. 1/2
Type: Research Article
ISSN: 1056-9219

Article
Publication date: 21 November 2023

Peyman Aghdasi, Shayesteh Yousefi and Reza Ansari

In this paper, based on the density functional theory (DFT) and finite element method (FEM), the elastic, buckling and vibrational behaviors of the monolayer bismuthene are…

66

Abstract

Purpose

In this paper, based on the density functional theory (DFT) and finite element method (FEM), the elastic, buckling and vibrational behaviors of the monolayer bismuthene are studied.

Design/methodology/approach

The computed elastic properties based on DFT are used to develop a finite element (FE) model for the monolayer bismuthene in which the Bi-Bi bonds are simulated by beam elements. Furthermore, mass elements are used to model the Bi atoms. The developed FE model is used to compute Young's modulus of monolayer bismuthene. The model is then used to evaluate the buckling force and fundamental natural frequency of the monolayer bismuthene with different geometrical parameters.

Findings

Comparing the results of the FEM and DFT, it is shown that the proposed model can predict Young's modulus of the monolayer bismuthene with an acceptable accuracy. It is also shown that the influence of the vertical side length on the fundamental natural frequency of the monolayer bismuthene is not significant. However, vibrational characteristics of the bismuthene are significantly affected by the horizontal side length.

Originality/value

DFT and FEM are used to study the elastic, vibrational and buckling properties of the monolayer bismuthene. The developed model can be used to predict Young's modulus of the monolayer bismuthene accurately. Effect of the vertical side length on the fundamental natural frequency is negligible. However, vibrational characteristics are significantly affected by the horizontal side length.

Details

Engineering Computations, vol. 41 no. 1
Type: Research Article
ISSN: 0264-4401

Keywords

Article
Publication date: 1 May 1997

Gunnar Bakkeland and Pierre R. Berthon

Some understanding and form of inter‐organisation management is necessary and desirable if a channel is to maintain or achieve satisfactory performance as a competitive entity…

Abstract

Some understanding and form of inter‐organisation management is necessary and desirable if a channel is to maintain or achieve satisfactory performance as a competitive entity (Stern and El‐Ansary 1992). Although this view is not novel (of. Alderson 1954,1957), it has not been the subject of extensive research (Frazier 1983), and interorganisational coordination in distribution channels has perhaps received less focus as a survival requirement (Dwyer and Oh 1988) than it deserves. Stern and El‐Ansary (1992) seem to reflect traditional points of view when stating that power is the major means available to achieve coordination and co‐operation among channel members. Power, however, gives rise to channel dependence and interdependence issues, (of. Pfeffer and Salancik 1978; Gaski 1984; Brown, Lusch and Muehling 1983), and issues of interorganisational governance mechanisms which for some years have also interested institutional economists, (of. Williamson 1993, 1991, 1986, 1981, 1975, Ouchi 1980) and economic sociologists, (of. Granovetter, 1985, Granovetter and Swedberg 1992). The marketing literature (of. Heide and John 1992; 1990; 1988) has questioned Williamson's somewhat simplistic treatment of opportunism as an underlying behavioural norm, central as this is to his transaction cost paradigm. Since Heide and John's [1992] work on the role of norms in marketing relationships, there is a distinct possibility that insufficient further research has been done in order to allow comparisons of their findings with those of other studies that differ with regard to cultures, settings, and time periods. Maintaining focus on the transaction between dyadic exchange partners as a fundamental activity in marketing channels (of. Achrol, Stern, and Reve 1983), the objectives of this article are to examine the existence or otherwise of relational norms between dyadic exchange partners serving as a governance mechanism safeguarding against opportunistic behaviour in the presence of transaction‐specific assets. The work of Heide and John [1992] shed much light on this, but examined the dyad from the perspective of a strong buyer facing a large number of small suppliers. We will focus on a strong supplier, facing a large number of small buyers, currently, but not indefinitely, bound to it by legislation and contract. The perspective adopted will be that of many small buyers (phar‐macies) from a monopolistic ethical drug wholesaler, at the time of dismantling of a statutory wholesale drug monopoly in Norway.

Details

Management Research News, vol. 20 no. 5
Type: Research Article
ISSN: 0140-9174

Book part
Publication date: 13 March 2023

MengQi (Annie) Ding and Avi Goldfarb

This article reviews the quantitative marketing literature on artificial intelligence (AI) through an economics lens. We apply the framework in Prediction Machines: The Simple

Abstract

This article reviews the quantitative marketing literature on artificial intelligence (AI) through an economics lens. We apply the framework in Prediction Machines: The Simple Economics of Artificial Intelligence to systematically categorize 96 research papers on AI in marketing academia into five levels of impact, which are prediction, decision, tool, strategy, and society. For each paper, we further identify each individual component of a task, the research question, the AI model used, and the broad decision type. Overall, we find there are fewer marketing papers focusing on strategy and society, and accordingly, we discuss future research opportunities in those areas.

Details

Artificial Intelligence in Marketing
Type: Book
ISBN: 978-1-80262-875-3

Keywords

Article
Publication date: 6 November 2007

Mahfooz A. Ansari, Daisy Kee Mui Hung and Rehana Aafaqi

Building upon the “fair exchange in leadership” notion (Hollander; Scandura), the purpose of this paper was to hypothesize the mediating impact of procedural justice climate on…

3483

Abstract

Purpose

Building upon the “fair exchange in leadership” notion (Hollander; Scandura), the purpose of this paper was to hypothesize the mediating impact of procedural justice climate on the relationship between leader‐member exchange (LMX) and two attitudinal outcomes: organizational commitment and turnover intentions.

Design/methodology/approach

A total of 224 managers voluntarily participated in the study. They represented nine multinational companies located in northern Malaysia. Data were collected by means of a structured questionnaire containing widely used scales to measure LMX (contribution, affect, loyalty, and professional respect), procedural justice climate, organizational commitment (affective, normative, and continuance), and turnover intentions. After establishing the goodness of measures, hypothesized relationships were examined using Structural Equation Modeling (SEM). While commitment and LMX were, respectively, conceptualized as 3‐ and 4‐dimensional constructs, procedural justice climate and turnover intentions were each treated as unidimensional constructs.

Findings

Whereas hypotheses for direct effects received low‐to‐moderate support, the mediation hypothesis received substantial support only in the case of professional respect dimension of LMX.

Research limitations/implications

The study has obvious implications for leader‐member exchange and procedural justice in organizations. Though findings are in line with those in the past research, they should be viewed with caution – given the nature of cross‐sectional data.

Originality/value

Management needs to pay attention to the quality of LMX, as today's employees look for mutual trust.

Details

Leadership & Organization Development Journal, vol. 28 no. 8
Type: Research Article
ISSN: 0143-7739

Keywords

Article
Publication date: 1 July 2008

Herman Aguinis, Mahfooz A. Ansari, Sharmila Jayasingam and Rehana Aafaqi

Based on the leadership, entrepreneurship, and issue selling literature, we hypothesized that entrepreneurs who are perceived to be successful can be differentiated from…

1192

Abstract

Based on the leadership, entrepreneurship, and issue selling literature, we hypothesized that entrepreneurs who are perceived to be successful can be differentiated from unsuccessful entrepreneurs based on their degree and type of social power. We conducted a field experiment including 305 Malaysian managers with considerable experience in working with entrepreneurs and in entrepreneurial environments. Entrepreneurs perceived to be successful were ascribed greater referent, information, expert, connection, and reward power; less coercive power; and similar legitimate power than unsuccessful entrepreneurs. These results provide evidence in support of social power as a distinguishing individual characteristic of successful entrepreneurs and make a contribution to theories linking social capital with entrepreneurial success. Aspiring entrepreneurs need to be aware that their social power profile is associated with various degrees of perceived success. Our paper points to the need to investigate variables beyond personality and that are more directly relevant to social and interpersonal interactions that may differentiate entrepreneurs perceived to be successful from those who are not.

Details

Management Research: Journal of the Iberoamerican Academy of Management, vol. 6 no. 2
Type: Research Article
ISSN: 1536-5433

Keywords

Article
Publication date: 28 April 2020

Megha Gupta, Kanika T. Bhal and Mahfooz A. Ansari

Drawing on similarity-attraction hypothesis and generational gap literatures, this study aims to examine the impact of age difference in a leader–member dyad on leader–member…

Abstract

Purpose

Drawing on similarity-attraction hypothesis and generational gap literatures, this study aims to examine the impact of age difference in a leader–member dyad on leader–member exchange (LMX). The study hypothesized that relational age would impact the subordinates-reported LMX. However, given that leaders have structural power over subordinates and hence have mechanisms of interaction available to them, the age difference might not determine their perception of quality of LMX. The study also hypothesized that generation gap in values and beliefs leads to lack of trust, on the part of subordinates, which in turn might be the reason for poor quality of LMX.

Design/methodology/approach

A total of 200 leader–member dyads from five organizations in the National Capital Region of India were used in this study. Data were collected via separate structured questionnaires for leaders and members, which comprised of standard scales of LMX and perceived trust, and demographics.

Findings

Hypotheses received substantial support from the data with a few exceptions. Only the loyalty dimension of perceived trust mediates the relationship between relational age and member perception of LMX.

Research limitations/implications

Results have implications for relational age and LMX interventions. However, the results are to be viewed in the light of members’ perspective. While this is a common practice in LMX research, it would be interesting to explore leaders’ trust and psychological reactions as well, for additional insights into leadership practice.

Originality/value

Limited work has been done to explore the impact of relational age on LMX, that too mediated by trust. An attempt has been made in this study to do so via leader–member dyads.

Details

Journal of Indian Business Research, vol. 12 no. 4
Type: Research Article
ISSN: 1755-4195

Keywords

1 – 10 of over 3000