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Publication date: 10 March 2022

Vahid Beygi, Mohammad Abooyee Ardakan and Seyyed Mohammad Moghimi

Despite the rather adequate physical and human resources available to Iranian state-owned enterprises (SOEs), they have proved not only unproductive and unprofitable but also…

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Abstract

Purpose

Despite the rather adequate physical and human resources available to Iranian state-owned enterprises (SOEs), they have proved not only unproductive and unprofitable but also corrupt in cases due to their corporate governance (CG) systems. This study aims to identify the most important challenges faced within designing, implementing and operating such systems in Iranian SOEs.

Design/methodology/approach

A judgmental sampling technique was adopted for the purposes of the present qualitative study to select a heterogeneous group of interviewees in terms of experience and expert knowledge in CG and SOEs. Using 28 semi-structured interviews and the thematic analysis methodology within an exploratory approach, the themes/challenges were extracted from the data thus collected that were subsequently analyzed and explicated.

Findings

The 16 challenges derived from the data set were subsequently classified into the four categories of “general assembly deficiencies”, “contextual issues of ownership”, “board deficiencies” and “external managerial constraints”.

Research limitations/implications

This study aims to provide insights into policy-making systems at both national and international levels to gain a better understanding of the contextual factors that could be exploited toward developing and/or reforming CG codes. To improve SOEs, this study also suggests four main solutions to the CG challenges faced within Iran and similar centralized economic planning systems.

Originality/value

The literature on the topic indicates that while a few theoretical and empirical studies have been conducted on CG of SOEs, no study has ever been conducted on similar Iranian cases. The present study provides ample empirical evidence from the CG systems in a state-controlled and centralized economic system to offer new insights into the comparative CG, especially in a developing country like Iran, where the government is the major player in the economy.

Details

International Journal of Islamic and Middle Eastern Finance and Management, vol. 15 no. 6
Type: Research Article
ISSN: 1753-8394

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Article
Publication date: 21 September 2018

Isam Tareq Abdullah and Sabah Khammass Hussein

The purpose of this paper is to optimize the welding parameters: rotating speed and plunging depth of carbon steel and pure copper joints using friction stir spot welding (FSSW…

152

Abstract

Purpose

The purpose of this paper is to optimize the welding parameters: rotating speed and plunging depth of carbon steel and pure copper joints using friction stir spot welding (FSSW) with the aid of the design of experiments (DOE) method.

Design/methodology/approach

Carbon steel and pure copper sheets were welded using the FSSW technique with a cylindrical tool and without a probe. The welding parameters were: rotating speed: 1,120, 1,400 and 1,800 RPM and plunging depth: 0.2 and 0.4 mm. The welding process was carried out both with and without pre-heating. The welded specimens were analyzed using a shear tensile test. A microstructural investigation at the optimum conditions was carried out. The results were analyzed and optimized using the statistical software Minitab and following the DOE method.

Findings

Pre-heating the sample and increasing the rotating speed and plunging depth increased the tensile shear force of the joint. The plunging depth has the biggest effect on the joint efficiency compared with the rotating speed. The optimum shear force (4,560 N) was found at 1,800 RPM, 0.4 mm plunge depth and with pre-heating. The welding parameters were modified so that the samples were welded at 1,800 RPM and at plunging depths of 0.45–1 mm in 0.05 mm steps. The optimized shear force was 5,400 N. The fractured samples exhibited two types of failure mode: interfacial and nugget pull-out.

Originality/value

For the first time, pure copper and carbon steel sheets were welded using FSSW and a tool without a probe with ideal joint efficiency (95 percent).

Details

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

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