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Article
Publication date: 15 May 2017

Ali Rostami and Chike F. Oduoza

Risks play an important role in the success of construction projects. Failure in identification and assessment of risks can lead to inadequacy in the process of managing…

Abstract

Purpose

Risks play an important role in the success of construction projects. Failure in identification and assessment of risks can lead to inadequacy in the process of managing risks, which in turn can critically affect the projects’ resources. A formal risk management is rarely practised in construction projects due to the lack of contractors’ awareness of key risks. The purpose of this paper is to focus on the investigation of risk factors in construction projects in Italy from contractors’ perspective.

Design/methodology/approach

Semi-structured interviews were conducted to collect data, based on which a total of ten key risks were ascertained. The identified risks were compared with the findings of the surveys conducted in the Australian and Chinese construction industry to address the unique risks associated with construction projects in Italy.

Findings

The key risks included delays in payments, client variations, design variations, inaccurate cost estimates, and tight project schedules. The comparison between those three countries specified the delays in payments and project funding problems as the most critical factors that are related to cultural influences and behaviour of clients. The findings assist contractors in the risk identification process, and can be applied to the development of a risk management framework for construction projects.

Research limitations/implications

The findings of this study cannot be generalised statistically for the whole of Italy as it was constrained geographically, with respondents drawn only from a self-selection sample of construction projects in the Veneto region of Northern Italy. The findings represent a snapshot of the key potential internal and external risks from the perspective of contractors.

Originality/value

The results of the study specified the key risks of construction projects from the perspective of contractors which can contribute to risk management for construction projects.

Details

Engineering, Construction and Architectural Management, vol. 24 no. 3
Type: Research Article
ISSN: 0969-9988

Keywords

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Article
Publication date: 2 May 2008

Ali Rajabzadeh, Ali Asghar Anvary Rostamy and Ali Hosseini

The purpose of this paper is to describe the outsourcing process in the public sector, determine the effective factors involved in this process and their priorities. The…

Abstract

Purpose

The purpose of this paper is to describe the outsourcing process in the public sector, determine the effective factors involved in this process and their priorities. The aim is to develop a generic conceptual model for the outsourcing process in public sectors.

Design/methodology/approach

This paper is based on the results of literature review and conducting binominal and Friedman tests. The model consists of the following steps and components: considering the organization's basic activities, evaluation of organizations' existing potentials and analyzing organizational processes, studying general outsourcing patterns, implementing and monitoring outsourcing process in terms of some critical success factors; and evaluation of outsourcing process of the organization and identifying feedbacks.

Findings

The paper determines the main components and influence factors involving in the process of outsourcing in public sectors. The generic model developed in this paper as a framework can be used to increase the efficiency and the effectiveness of the outsourcing process of organizations in public sector.

Practical implications

The authors believe that the proposed model and results of this research can aid public sector managers to implement their outsourcing process in a more efficient and effective manner in their organizations.

Originality/value

This paper develops a new generic conceptual model based on literature review, field resaech and using binominal and Frideman test. This model is unique and can be considered as an aid in the outsourcing process of organizations.

Details

Management Decision, vol. 46 no. 4
Type: Research Article
ISSN: 0025-1747

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Article
Publication date: 19 January 2015

Ali Rostami, James Sommerville, Ing Liang Wong and Cynthia Lee

The competition and challenges facing construction firms during the recent recession have brought risk management (RM) to the fore in people’s minds. Examination of the…

Abstract

Purpose

The competition and challenges facing construction firms during the recent recession have brought risk management (RM) to the fore in people’s minds. Examination of the difficulties of implementing RM in small and medium enterprises (SMEs) in the UK construction industry has been relatively untouched. The paper aims to discuss these issues.

Design/methodology/approach

As part of on-going research to facilitate RM processing aimed at improving the competitiveness of SMEs, the difficulties in RM implementation were identified through a literature review of RM implementation in SMEs. Postal questionnaire were sent to SMEs who have experience of construction management.

Findings

Of the 153 of SMEs responding, most highlighted that the main difficulty experienced is how to scale RM process to meet their requirements. None of the available standards explain the fundamental principle of applying RM to the situations that SMEs find themselves in. This difficulty is further exacerbated by a lack of management skills and knowledge in the adoption of RM tools or techniques to identify and analyse the business’ risks.

Originality/value

The identified difficulties can be considered to develop a process to facilitate RM process within SMEs.

Details

Engineering, Construction and Architectural Management, vol. 22 no. 1
Type: Research Article
ISSN: 0969-9988

Keywords

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Article
Publication date: 25 October 2018

Safae Hasnaoui, Abdelkhalek Amahmid, Abdelghani Raji, Hassen Beji, Mohammed Hasnaoui, Youssef Dahani and Haykel Benhamed

The purpose of this paper is to study numerically thermosolutal natural convection within an inclined rectangular cavity in the presence of Soret effect and heat…

Abstract

Purpose

The purpose of this paper is to study numerically thermosolutal natural convection within an inclined rectangular cavity in the presence of Soret effect and heat generation. The enclosure is heated and salted from its long sides with constant but different temperatures and concentrations. The study focuses on the effects of three main parameters which are, the Soret parameter (Sr = 0 and –0.5), the internal to external Rayleigh numbers ratio 0 ≤ R ≤ 80 and the cavity inclination γ, varied from 0° (vertical position) to 60°. The combined effects of these parameters on fluid flow and heat and mass transfer characteristics are examined for the external Rayleigh number RaE = 105, the Prandtl number Pr = 0.71, the buoyancy ratio N = 1, the Lewis number Le = 2 and the aspect ratio of the cavity A = 2.

Design/methodology/approach

A hybrid lattice Boltzmann-finite difference method (LBM-FD) was used to tackle the problem under consideration. The LBM with the simple relaxation time was used for the fluid flow in the presence of the gravity force, while the temperature and concentration equations were solved separately using an explicit finite-difference technique at the Boltzmann scale.

Findings

The monocellular nature of the flow, obtained for R = 0 is not destroyed by varying the cavity inclination and the Soret parameter but rather by the increase of the parameter R. The Soret parameter and the cavity inclination become perceptible at high values of R. The inclination γ = 60° leads to high mean temperatures compared to the other inclinations. The effect of R on mean concentration is amplified in the presence of Soret effect but limited in the absence of the latter. The negative Soret parameter combined with high internal heat generation and a relatively high inclination is important when the objective is to maintain the fluid at a high concentration of species. The presence of bicellular flow combined with the important elevation undergone by the fluid temperature, makes both the cold and hot walls playing a cooling role with the most important exchanges taking place at the upper part of these walls. The analysis of the mean mass transfer shows that the increase of the inclination may lead to an increase or a decrease of the mass transfer depending on the range of R, in the case of Sr = 0. However, for Sr = −0.5, it is observed that the increase of γ is generally accompanied by a reduction of the mass transfer.

Originality/value

To the best of the authors’ knowledge, the hybrid LBM-FD was not used before to study such a problem. Combined effect of R and inclination may be useful in charging the fluid with species when the objective is to maintain high concentrations in the medium.

Details

Engineering Computations, vol. 35 no. 8
Type: Research Article
ISSN: 0264-4401

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Article
Publication date: 9 July 2019

Mehdi Fasihi, Mohammad Yousefi, Abdolrasoul Safaiyan, Mahdi Mousavi Mele, Mohammadreza Rostami and Ali Barzegar

The purpose of this paper is to examine the effect of green coffee extract on anthropometric index and lipid profile, fasting blood sugar, chemerin and malondialdehyde on…

Abstract

Purpose

The purpose of this paper is to examine the effect of green coffee extract on anthropometric index and lipid profile, fasting blood sugar, chemerin and malondialdehyde on subjects with metabolic syndrome.

Design/methodology/approach

A randomized, double-blind, placebo-controlled clinical trial was conducted in Sheikh Al Raise Clinic from September 2016 to March 2017. The participants were randomly divided into green coffee group and placebo group. Green coffee group (n = 24) received green coffee extract (GCE), while placebo group (n = 24) took cellulose as a placebo, two capsules (400 mg) two times each day for eight weeks. The anthropometric index and lipid profile, fasting blood sugar, chemerin and malondialdehyde were measured at the beginning of the study and after eight weeks of treatment with GCE. Blood samples were collected before and after eight weeks of supplementation.

Findings

Significant weight loss, from 84.80 ± 2.12 kg to 80.94 ± 2.10 kg (ptime = 0.030, pGC = 0.007), as well as decreases in body mass index (ptime = 0.034, pGC = 0.006) were detected in the green coffee group after eight weeks. Also, the green coffee group has significant lower (pgroup = 0.029, ptime = 0.013) malondialdehyde (MDA) compared to the placebo group, and there was a significant difference between two groups at the insulin level and homeostatic model assessment of insulin resistance (HOMA-IR) (ptime = 0.001, pgroup = 0.048), (ptime = 0.012, pgroup = 0.007). However, there was no significant difference in lipid profile, fasting blood sugar and serum chemerin between two groups after eight weeks of supplementation.

Originality/value

This paper showed the statistical difference in body weight, malondialdehyde, insulin and insulin resistance after eight weeks of treatment. GCE might be associated to reduction in the carbohydrate absorption and the enhancement of lipid metabolism.

Details

Nutrition & Food Science , vol. 50 no. 1
Type: Research Article
ISSN: 0034-6659

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Article
Publication date: 13 February 2017

Mahdi Moradi, Mohammad Ali Bagherpour Velashani and Mahdi Omidfar

The purpose of this study is to investigate the effect of product market competition and corporate governance on firm’s management performance in the Tehran Stock Exchange…

Abstract

Purpose

The purpose of this study is to investigate the effect of product market competition and corporate governance on firm’s management performance in the Tehran Stock Exchange market. According to the research literature, the governance mechanisms used in this study consist of ownership structure, structure of the board of directors and capital structure. In addition, Herfindahl–Hirschman Index and market size were used to measure the product market competition.

Design/methodology/approach

This study used one selected sample among the firms in the capital market of Iran from 2004 to 2012.

Findings

The results of this study indicated that there is a significant relation among the major governance mechanisms (including ownership concentration, independence of the board of directors and debt ratio) and product market competition and management performance. The findings of this study also showed that product market competition is effective on the relation between corporate governance and the performance, and this is what has been ignored in most of the conducted studies.

Originality/value

In general, the results of this study supported the idea that product market competition is effective on implementation and efficiency of governance mechanisms.

Details

Humanomics, vol. 33 no. 1
Type: Research Article
ISSN: 0828-8666

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Article
Publication date: 27 May 2020

Mohammed Saleh Alosani, Rushami Zien Yusoff, Ali Ali Al-Ansi and Hassan Saleh Al-Dhaafri

This study aims to empirically examine the relationship between Six Sigma and organisational performance of the Dubai Police Force (DPF). Moreover, this study further…

Abstract

Purpose

This study aims to empirically examine the relationship between Six Sigma and organisational performance of the Dubai Police Force (DPF). Moreover, this study further explores the role of innovation culture as a mediating variable between this relationship.

Design/methodology/approach

A questionnaire survey was conducted to collect research data. The population of the study was composed of head section officers of the DPF. A total of 388 questionnaires were distributed amongst respondents in which 252 of them were returned. Structural equation modelling was performed to test the hypothesised model.

Findings

Central findings confirmed the effect of Six Sigma and innovation culture on organisational performance. Additionally, innovation culture was found to partially mediate the effects of Six Sigma on organisational performance.

Practical implications

Findings from this study may enlighten managers, practitioners and academicians on the importance of using Six Sigma in the policing field. This study advocates taking into account preparing appropriate culture when implementing Six Sigma projects given its role in facilitating the implementation of these projects and achieving success. Six Sigma with innovation culture provides a key opportunity for the creation of uniqueness and has the potential to significantly influence organisational performance.

Originality/value

This study adds to the current knowledge on the role of Six Sigma on organisational performance of police agencies. This study is the first to provide empirical evidence on the mediating role of innovation culture on the relationship between Six Sigma and organisational performance in policing context.

Details

International Journal of Lean Six Sigma, vol. 12 no. 2
Type: Research Article
ISSN: 2040-4166

Keywords

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Book part
Publication date: 24 August 2016

Tara Povey

This chapter analyses the strategies employed by women and youth political activists in Iran in the context of changes engendered by the neo-liberal policies pursued by…

Abstract

Purpose

This chapter analyses the strategies employed by women and youth political activists in Iran in the context of changes engendered by the neo-liberal policies pursued by successive governments since the end of the Iran-Iraq war.

Design/methodology/approach

The analysis in this chapter is based on semi-structured interviews conducted by the author with women and youth activists in Iran in 2015. This qualitative data is contextualised within a theoretical discussion of the nature of the Iranian state, the impact of neo-liberal policies, and debates surrounding gender and neo-liberalism.

Findings

Contrary to the view of politics in Iran as a battle between hard-line religious fundamentalists and moderates, this chapter argues that it is not the religious nature of the state but its neo-liberal policies that have made it more difficult for women and youth activists to mobilise against the exclusionary policies of the state. In response activists in Iran have developed and articulated strategies of resistance to and accommodation with the Islamic Republic’s neo-liberal project.

Originality/value

The chapter breaks with prevailing socio-cultural analyses of women’s rights in Iran and provides a critique of prevalent ideas of women’s rights as innately connected to liberal and specifically neo-liberal forms of politics and governance.

Details

Gender and Race Matter: Global Perspectives on Being a Woman
Type: Book
ISBN: 978-1-78635-037-4

Keywords

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Article
Publication date: 25 June 2019

Saeed Dinarvand, Mohammadreza Nademi Rostami, Rassoul Dinarvand and Ioan Pop

This paper aims to simulate the steady laminar mixed convection incompressible viscous and electrically conducting hybrid nanofluid (CuO-Cu/blood) flow near the plane…

Abstract

Purpose

This paper aims to simulate the steady laminar mixed convection incompressible viscous and electrically conducting hybrid nanofluid (CuO-Cu/blood) flow near the plane stagnation-point over a horizontal porous stretching sheet along with an external magnetic field and induced magnetic field effects that can be applicable in the biomedical fields like the flow dynamics of the micro-circulatory system and especially in drug delivery.

Design/methodology/approach

The basic partial differential equations (PDEs) are altered to a set of dimensionless ordinary differential equations (ODEs) with the help of suitable similarity variables which are then solved numerically using bvp4c scheme from MATLAB. Inasmuch as validation results have shown a good agreement with previous reports, the present novel mass-based algorithm can be used in this problem with great confidence. Governing parameters are both nanoparticle masses, base fluid mass, empirical shape factor of both nanoparticles, suction/injection parameter, magnetic parameter, reciprocal magnetic Prandtl number, Prandtl number, heat source parameter, mixed convection parameter, permeability parameter and frequency ratio. The effect of these parameters on the flow and heat transfer characteristics of the problem is discussed in detail.

Findings

It is shown that the use of CuO and Cu hybrid nanoparticles can reduce the hemodynamics effect of the capillary relative to pure blood case. Moreover, as the imposed magnetic field enhances, the velocity of the blood decreases. Besides, when the blade shapes for both nanoparticles are taken into account, the local heat transfer rate is maximum that is also compatible with experimental observations.

Originality/value

An innovative mass-based model of CuO-Cu/blood hybrid nanofluid has been applied. The novel attitude to one-phase hybrid nanofluid model corresponds to considering nanoparticles mass as well as base fluid mass to computing the solid equivalent volume fraction, the solid equivalent density and also solid equivalent specific heat.

Details

International Journal of Numerical Methods for Heat & Fluid Flow, vol. 29 no. 11
Type: Research Article
ISSN: 0961-5539

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Article
Publication date: 19 March 2021

Najiyah Safwa Khashi'ie, Norihan M. Arifin, John H. Merkin, Rusya Iryanti Yahaya and Ioan Pop

The purpose of this paper is to numerically analyze the stagnation point flow of Cu-Al2O3/water hybrid nanofluid with mixed convection past a flat plate and circular cylinder.

Abstract

Purpose

The purpose of this paper is to numerically analyze the stagnation point flow of Cu-Al2O3/water hybrid nanofluid with mixed convection past a flat plate and circular cylinder.

Design/methodology/approach

The similarity equations that reduced from the boundary layer and energy equations are solved using the bvp4c solver. The duality of solutions is observed within the specific range of the control parameters, namely, mixed convection parameter λ, curvature parameter γ and nanoparticles volumetric concentration ϕ1 for alumina, while for copper ϕ2. The stability analysis is also designed to justify the particular solutions’ stability. Additionally, the idea to obtain the solution for large value of λ and γ is also presented in this paper.

Findings

Two solutions exist in opposing and assisting flows up to a critical value λc where λc lies in the opposing region. An upsurge of the curvature parameter tends to extend the critical value (delay the separation process), whilst increase the heat transfer performance of the working fluid. Meanwhile, the application of hybrid Cu-Al2O3/water nanofluid also can decelerate the separation of laminar boundary layer flow and produce higher heat transfer rate than the Cu–water nanofluid and pure water.

Originality/value

The results are new and original. This study benefits to the other researchers, specifically in the observation of the fluid flow characteristics and heat transfer rate of the hybrid nanofluid. Also, this paper features with the mathematical formulation for the solution with large values of λ and γ.

Details

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

Keywords

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