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Article
Publication date: 12 March 2018

Samy Shaban, Abd Elaziz Fouda, Mohamed Elmorsi, Tarek Fayed and Omar Azazy

The purpose of this study is to inspect the corrosion inhibition of API N80 steel pipelines in uninhibited solution and inhibited with a synthesized surfactant compound…

253

Abstract

Purpose

The purpose of this study is to inspect the corrosion inhibition of API N80 steel pipelines in uninhibited solution and inhibited with a synthesized surfactant compound [N-(3-(dimethyl octyl ammonio) propyl) palmitamide bromide] (DMDPP), which is prepared through a simple and applicable method.

Design/methodology/approach

Weight loss was inspected at five different temperatures of 25°C, 30°C, 40°C, 50°C and 60°C Potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) and electrochemical frequency modulation were used at room temperature. Density functional theory was used to study the relation between the molecular structure and inhibition theoretically.

Findings

Adsorption of the prepared DMDPP fits the Langmuir isotherm model. The inhibition efficiency of the prepared DMDPP amphipathic inhibitor is directly proportional to temperature increase. Polarization results reveal that the investigated DMDPP amphipathic compound behaves as a mixed-type inhibitor. EIS spectra produced one individual capacitive loop.

Originality/value

The originality is the preparation of cationic surfactants through a simple method, which can be used as corrosion inhibitors in oil production. The synthesized inhibitors were prepared from low-price materials. The work studied the behavior of the synthesized surfactants in inhibiting the corrosion of the steel in an acidic medium. Electrochemical and theoretical studies were presented, besides gravimetric and surface examination.

Details

Anti-Corrosion Methods and Materials, vol. 65 no. 2
Type: Research Article
ISSN: 0003-5599

Keywords

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Article
Publication date: 12 December 2024

Mirame Elsayed, Abeer Elshater, Dina Shehayeb and Samy Afifi

Neuro-urbanism is an emerging field focused on addressing global urban challenges by examining the impact of urban living on stress levels and mental well-being. The restorative…

37

Abstract

Purpose

Neuro-urbanism is an emerging field focused on addressing global urban challenges by examining the impact of urban living on stress levels and mental well-being. The restorative environment approach has been widely applied to measure stress and mental health outcomes. Although there is a recognised relationship between neuro-urbanism and restorative environments, further exploration of literature is needed. This paper aims to propose a conceptual urban restorative model that leverages neuro-urbanism to explore the potential of various urban space typologies and their associated urban design qualities in fostering restorative environments.

Design/methodology/approach

This review article utilised VOSviewer to conduct a bibliometric analysis of data from Scopus and PubMed, focusing on neuro-urbanism and restorative environments. Our study explored the intersection of neuroscience and urbanism in designing environments that enhance mental well-being by mapping keyword co-occurrences and analysing citation networks. It identified research clusters, emerging trends and literature gaps, offering a detailed overview of how these fields intersect and influence each other.

Findings

Our findings have revealed significant links between these fields, paving the way for the proposed restorative model. This model, derived from the literature, outlines the types of restorative environments, managing domains and theories integrating intangible and tangible urban design qualities using features and variables.

Research limitations/implications

This study has limitations, as the proposed urban restorative model was developed using data from a literature review of databases such as Scopus and PubMed without testing its application in a real-world case study. Nevertheless, the urban restorative model provides valuable insights that can support urban designers, planners and public health organisations in evaluating restorative environments, which may enhance mental well-being and reduce stress in urban settings.

Originality/value

This research contributes to the broader understanding of how urban design can influence mental well-being and provides actionable keys for improving the quality of life in urban settings.

Details

Open House International, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 0168-2601

Keywords

Available. Open Access. Open Access

Abstract

Details

Journal of Intelligent Manufacturing and Special Equipment, vol. 4 no. 1
Type: Research Article
ISSN: 2633-6596

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Article
Publication date: 19 August 2020

Shaban Mohammadi, Hadi Saeidi and Nader Naghshbandi

The purpose of this study is to investigate the effect of board and audit committee characteristics on corporate social responsibility (CSR) in Iranian companies listed in stock…

2584

Abstract

Purpose

The purpose of this study is to investigate the effect of board and audit committee characteristics on corporate social responsibility (CSR) in Iranian companies listed in stock exchanges.

Design/methodology/approach

This is a descriptive-correlational and an applied research. The statistical population of this research is all companies listed in Tehran Stock Exchange and the research period is from 2012 to 2018. Using screening method a sample of 150 companies was selected. Multivariate regression and the software Eviews 10 were used for data analysis and hypothesis testing.

Findings

The results indicated that board size had a significant effect on CSR; board independence had a significant effect on CSR; managerial ownership did not have a significant effect on CSR; CEO duality did not have a significant effect on CSR; audit committee size had a significant effect on CSR; audit committee independence had a significant effect on CSR; and financial expertise of audit committee members had a significant effect on CSR.

Originality/value

The present study is the first research performed on the effect of board and audit committee characteristics on CSR in Iran. The results of this study contribute to the literature on the effect of board and audit committee characteristics on CSR and provide suggestions for capital market participants. CSR helps reduce asymmetric distribution of information among the internal and external organizational entities and reduce agency problems and conflicts among different groups. Based on the results, an effective audit committee as an effective mechanism enhances the credibility of financial and non-financial reporting such as social responsibility, which means that an effective audit committee can improve the level of voluntary disclosure of information through effective oversight of the reporting process. It is also suggested that companies focus on audit committee characteristics to increase the level of CSR.

Details

International Journal of Productivity and Performance Management, vol. 70 no. 8
Type: Research Article
ISSN: 1741-0401

Keywords

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