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Article
Publication date: 11 February 2019

Nobl Foad El Boraei, Sayed S. Abd El Rehim and Hamdy H. Hassan

The purpose of this paper is to study the electrochemical behavior of Sn electrode in Na2B2O7 solutions in the absence and presence of NaNO3 as a pitting corrosion agent.

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Abstract

Purpose

The purpose of this paper is to study the electrochemical behavior of Sn electrode in Na2B2O7 solutions in the absence and presence of NaNO3 as a pitting corrosion agent.

Design/methodology/approach

The electrochemical behavior of Sn electrode was studied by using cyclic voltammetry and potentiodynamic polarization measurements and complemented with scanning electron microscopy examinations.

Findings

This paper shows that in the absence of NO3 − ions, the anodic polarization of Sn electrode exhibits active/passive transition. Addition of various concentrations of NO3 − anions to the borate solution enhances active anodic dissolution and tends to break down the passive oxide film at a certain pitting potential. The pitting potential, and hence the pitting corrosion resistance, decreases with increasing NO3-ion concentration and temperature but increases with scan rate and repetitive cycling. Addition of CrO42−, WO42− or MoO42− oxyanions to the borate nitrate solution inhibits the pitting corrosion of Sn.

Originality/value

This is the first study that shows the effect of NO3 − ion as a pitting corrosion agent.

Details

Anti-Corrosion Methods and Materials, vol. 66 no. 3
Type: Research Article
ISSN: 0003-5599

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Article
Publication date: 23 August 2021

Hamdi Khalfaoui and Hassan Guenichi

This paper aims to investigate the impact of Islam, as a set of moral and cultural values, on economic growth and development for 17 Muslim countries over the period 1990–2019.

470

Abstract

Purpose

This paper aims to investigate the impact of Islam, as a set of moral and cultural values, on economic growth and development for 17 Muslim countries over the period 1990–2019.

Design/methodology/approach

To identify the relationship between Islam and economic growth, the authors have proceeded with an empirical panel data analysis using the Autoregressive Distributed Lag (ARDL) model. The study is conducted initially on a sample of 17 Muslim countries and then on 2 sub-samples composed of 12 Arab Muslim countries and 5 non-Arab Muslim countries.

Findings

The empirical analysis showed a significant negative relationship between Islam and economic growth for the Arab-Muslim countries. While for the non-Arab Muslim countries, the relationship remains positive. Following the introduction of the interactive social variables (unemployment and illiteracy), the authors show that increasing unemployment exacerbates the negative effect of Islam on growth. While the effect of illiteracy remains statistically insignificant. However, for non-Arab Muslim countries, the positive effect of Islam on growth is all the greater as these countries have large social contemplation. However, the introduction of the interactive cultural variables (uncertainty avoidance index and long run orientation), show that the positive effect of Islam on growth is all the more important as the non-Arab Muslim countries have a wider cultural value system. While for the total sample and the sub-sample of Arab-Muslim countries, the cultural dimension does not affect the relationship between Islam and economic growth.

Research limitations/implications

Although there are more religions, the authors have considered only Islam as its relationship with economic, social and cultural development and its influence on the entrepreneurial culture is problematic. Maybe a comparative study between different religions offers us a more convincing result.

Practical implications

Social conditions, cultural heritage and race (Arab or non-Arab) play an important role in determining the relationship between Islam and economic development.

Social implications

The effect of Islam remains dependent on Islamic thought and its long-term orientation, uncertainty avoidance and the level of social value creation in the countries where it is practiced.

Originality/value

On the theoretical and on the empirical level, the analysis of the relationship between Islam and development is rarely addressed in the relevant literature because of its sociologically sensitive aspect. Islam would have a positive effect on growth when it evolves in countries that have built their growth on an extroverted and developed economic model and an adequate social and cultural value creation system. However, unemployment, illiteracy, cultural patrimony and race of the Muslim population (Arab or non-Arab) plays, in the long run, a very important role in determining the relationship between Islam and economic growth.

Details

International Journal of Law and Management, vol. 64 no. 2
Type: Research Article
ISSN: 1754-243X

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Article
Publication date: 28 November 2023

Ahmed Hamdy and Riyad Eid

This study aims to analyze the moderating roles of familiarity, generation and gender on the impacts of coronavirus fear-uncertainty on the destination image and visiting…

223

Abstract

Purpose

This study aims to analyze the moderating roles of familiarity, generation and gender on the impacts of coronavirus fear-uncertainty on the destination image and visiting intentions post-COVID-19.

Design/methodology/approach

This paper seeks to provide evidence for a research conclusion by conducting a survey of 431 potential travelers of various nationalities who visited Egypt. The data were examined using structural equation modeling with a multigroup analysis and PROCESS MACRO.

Findings

The findings indicated that the links between coronavirus fear-uncertainty, the destination image and intention to visit were significantly different from one gender and generation group to another. Moreover, it showed that destination familiarity moderates the negative effects of coronavirus fear-uncertainty on the destination image and intention to visit.

Originality/value

To the best of the authors’ knowledge, this paper is the first to explore the moderating role of destination familiarity, generation and gender in the effects post-COVID-19 of coronavirus fear-uncertainty on the destination image and travelers’ intention to visit using generational cohort theory and gender schema theory.

Details

Consumer Behavior in Tourism and Hospitality, vol. 19 no. 1
Type: Research Article
ISSN: 2752-6666

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Article
Publication date: 24 September 2024

Khalfaoui Hamdi, Nabli Mohamed Amine and Guenichi Hassan

This paper investigates the relationship between sporting performance and the market value of European football clubs, with a particular focus on the moderating effect of player…

154

Abstract

Purpose

This paper investigates the relationship between sporting performance and the market value of European football clubs, with a particular focus on the moderating effect of player transfers, fan engagement and coaching changes.

Design/methodology/approach

Using a Cross-Sectional Augmented Auto Regressive Distributed Lagged Model (CS-ARDL), we analyze a decade of data (2013–2023) from fourteen prominent clubs across ten European leagues.

Findings

Our findings confirm a strong positive correlation between sporting performance and market value in European football clubs. Furthermore, the research reveals that strategic player transfers and high fan engagement significantly amplify the positive impact of on-field success on a club's valuation. Interestingly, coaching changes do not exhibit a significant moderating effect on this relationship.

Research limitations/implications

These findings carry significant economic implications for the football industry, underscoring sporting success as not only a driver of economic growth and social development but also a vital source of funding for clubs seeking to further invest in talent, infrastructure and fan engagement initiatives.

Originality/value

This study makes a novel contribution to the existing literature by providing a comprehensive analysis of the intricate relationship between sporting performance, market value and the moderating roles of player transfers, fan engagement and coaching changes within the European football landscape. Moreover, the research offers unique insights into investor behavior and the factors influencing investment decisions, enriching our understanding of the complex dynamics driving the football market.

Details

Managerial Finance, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 0307-4358

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Article
Publication date: 28 May 2021

Mahmoud Abdelrahman Kamel, Mohamed El-Sayed Mousa and Randa Mohamed Hamdy

This study used data envelopment analysis (DEA) models to measure financial efficiency of twelve commercial banks listed in the Egyptian stock exchange (CBLSE), along with…

819

Abstract

Purpose

This study used data envelopment analysis (DEA) models to measure financial efficiency of twelve commercial banks listed in the Egyptian stock exchange (CBLSE), along with evaluating changes to the financial efficiency during the period 2017–2019.

Design/methodology/approach

The study used BCC-I, cross-efficiency, super-efficiency models, and Malmquist productivity index (MPI) to assess financial efficiency of the examined banks. The available data from both inputs and outputs were analyzed using R. studio V.I.3. 1056 software.

Findings

Out of twelve banks examined, only four banks were efficient under BCC-I model over different years of the study period; however, only one bank (CIB) appeared to be the most efficient compared to other peers in the study sample. Moreover, MPI results revealed decreased financial efficiency during the study period, due to the decreased technological innovation, except for HDB. Tobit regression results confirmed that total assets and total equity are significant factors impacted financial efficiency of CBLSE.

Practical implications

This study sheds light on the importance of evaluating financial efficiency of CBLSE to all stakeholders, to pinpoint weaknesses in banks' performance, and for evaluating financial policies and investment decisions.

Originality/value

Several studies sought to implement different models of DEA to assess banking performance in different regions of the world, but very few studies examined financial efficiency of banks. To the best of authors’ knowledge, this study is one of those few that addressed financial efficiency of banks in Egypt.

Details

International Journal of Productivity and Performance Management, vol. 71 no. 8
Type: Research Article
ISSN: 1741-0401

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Article
Publication date: 26 July 2023

Hamdy Mohamed Mohamed and Wael Sabry Mohamed

The study aims to assess the efficiency of nanocomposite to improve the properties of gap-filling materials for pottery artifacts.

101

Abstract

Purpose

The study aims to assess the efficiency of nanocomposite to improve the properties of gap-filling materials for pottery artifacts.

Design/methodology/approach

Five different pastes were used in the laboratory studies. The pastes consist mainly of pottery powder (grog), dental plaster, microballoons and an adhesive of Primal AC33, nano-silica and nano kaolinite in various concentrations. The prepared samples were subjected to accelerated heat and light aging. Besides, some investigations were used to evaluate the efficacy of the additive nanomaterials, such as TEM, digital and scanning electron microscopy microscopes. Contact angle, color change, shrinkage degree, physical properties and compressive strength tests were also conducted.

Findings

The results indicated that using Nano-silica considerably improves the mechanical strength and decreases the shrinkage of gap-filling materials. According to the results, a mixture of grog, microballoons and Primal AC33/Nano-silica Nanocomposites is the optimal gap-filling paste for archaeological pottery. Moreover, this paste showed a higher contact angle (120°), lower color change (ΔE = 2.62), lower shrinkage (3.3%), lower water absorption (3.36%), lower porosity (5.05%) and higher compressive strength (5124 N/mm2).

Originality/value

This paper attains to develop an economic polymer-nanocomposite that can be used with gap-filling materials for pottery artifacts.

Details

Pigment & Resin Technology, vol. 53 no. 6
Type: Research Article
ISSN: 0369-9420

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Article
Publication date: 5 January 2023

Hamdy Mohamed Mohamed and Wael Sabry Mohamed

This study aims to offer an effective nanocomposite for potential use to consolidate and protect deteriorated archaeological pottery.

284

Abstract

Purpose

This study aims to offer an effective nanocomposite for potential use to consolidate and protect deteriorated archaeological pottery.

Design/methodology/approach

Three nanocomposites were used in the experimental study. This study used nano Primal AC33, silicon dioxide (SiO2) and montmorillonite (MMT) nanoparticles to protect and consolidate pottery specimens. Pottery specimens were made at 800°C for this investigation. Consolidation materials were applied with a brush. The properties of the treated pottery specimens were assessed using several methods such as digital and scanning electron microscopes, static water contact angle, color alteration, physical properties and compressive strength.

Findings

Microscopic examination indicated the ability of the nano Primal AC33/MMT nanocomposites to cover the outer surface well and bind the inner granules. Concerning specimens with code F treated with nano Primal AC33 5%/MMT 3% nanocomposites, it achieved an increase in contact angle (120°), density (1.23 g/cm3) and compressive strength (561 kg/cm2), as well as a decrease in color change (ΔE = 2.62), water absorption (4.45%) and porosity (5.46%). The novelty of the results is due to the characteristics of nano Primal AC33 5%/MMT 3% nanocomposites used in the current study.

Originality/value

This study describes the significant results of the analytical methods used for evaluating consolidation materials used in this study. The findings offer useful information for the protection of archaeological pottery. The investigation indicated that nano Primal AC33 5%/MMT 3% nanocomposites gave the best results. Therefore, it is recommended to use this nanocomposite to consolidate archaeological pottery. As a result, the current work provides a promising first step in conserving archaeological pottery for future studies.

Details

Pigment & Resin Technology, vol. 53 no. 4
Type: Research Article
ISSN: 0369-9420

Keywords

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Book part
Publication date: 26 November 2021

Helen M. Dah, Robert J. Blomme, Ad Kil and Ben Q. Honyenuga

This study focuses on the factors that determine the readiness of hotels to implement customer relationship management (CRM) in hotels within the context of Ghana. The sample…

Abstract

This study focuses on the factors that determine the readiness of hotels to implement customer relationship management (CRM) in hotels within the context of Ghana. The sample consisted of 292 employees (restaurant managers, customer service officers, customer relations' officers, and marketing managers) from 3- to 5-star hotels. The study adopted a quantitative deductive approach to collected data using cross-sectional survey, which was analyzed using Partial Least Squares Structural Equation Modeling (PLS-SEM). The findings revealed that management change initiatives and culture have significant impact on organizational readiness to implement CRM in hotels, specifically Ghana. Also, the organizational culture partly mediates management change initiatives and organizational readiness to implement CRM activities. On the other hand, use of technology proved not to mediate management change initiatives and organizational readiness as the relationship proved not to be significant. Also, culture and use of technology have not mediated management change initiatives and organizational readiness as the indirect path proved not to be significant. The outcomes have useful implications for CRM adoption by hotel managers.

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Book part
Publication date: 17 January 2023

Helen M. Dah, Robert J. Blomme, Arie Kil and Ben Q. Honyenuga

This chapter investigates the effect of customer orientation and CRM organization on hotel financial performance. A model of enhancing hotel financial performance through customer…

Abstract

This chapter investigates the effect of customer orientation and CRM organization on hotel financial performance. A model of enhancing hotel financial performance through customer satisfaction practices was tested. Customer satisfaction was hypothesized to be a mediator in the relationships between customer orientation and CRM organization and the result being financial performance. The sample consisted of 54 hotels that was made up of three 5-star, fifteen 4-star, and thirty-six 3-star hotels in Ghana. A quantitative deductive approach was employed to gather data using cross-sectional survey, which was analyzed using PLS-SEM to check the validity, reliability and factor loading of the data. The findings revealed that, CRM organization enhances customer satisfaction and financial performance of hotels. Also, customer orientation showed significant positively related to customer satisfaction in the hotels. Surprisingly, the effects of CRM organization and customer orientation on financial performance through customer satisfaction were insignificant. Thus, customer satisfaction failed to mediate the effect of CRM organization and customer orientation on the financial performance of hotels. This suggests that though an effective CRM organization enhances customer satisfaction, it directly affects the financial performance of hotels. The outcomes have useful implications for CRM implementation on hotel financial performance in Ghana.

Details

Advances in Hospitality and Leisure
Type: Book
ISBN: 978-1-80382-816-9

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Article
Publication date: 13 May 2024

Rania Abdel Gwad Eloriby, Wael Sabry Mohamed and Hamdy Mohamed Mohamed

The purpose of this study is to evaluate the effectiveness of nanocontainer solutions in removing deteriorated and aged polymers commonly used in coating and consolidating…

39

Abstract

Purpose

The purpose of this study is to evaluate the effectiveness of nanocontainer solutions in removing deteriorated and aged polymers commonly used in coating and consolidating archaeological glass.

Design/methodology/approach

This study focused on characterizing glass surfaces coated with two commonly used polymeric materials in archaeological glass preservation. Furthermore, the study evaluates the elimination of these coatings from the surfaces by using innovative aqueous systems composed of micellar solutions (MS) and oil-in-water (O/W) Texapon-P microemulsions (TEX). Glass samples coated with selected polymers were subjected to thermal and photochemical aging to simulate natural degradation conditions. This study aimed to evaluate the effectiveness of nanocontainer aqueous systems compared to acetone (Ac), a conventional solvent commonly used for removal procedures. The characterization procedures involved transmission electron microscopy, USB digital microscopy, scanning electron microscopy, color alteration and gravimetric measurement.

Findings

The findings indicate that the effectiveness of novel techniques using aqueous nanocontainer systems is quite promising when considering a “green approach” to preserving cultural heritage. Microscopic examination demonstrated the efficacy of MS in effectively removing acrylic and vinyl polymers from the glass surface. Furthermore, TEX proved effective in removing polyvinyl acetate (PVA) over Paraloid B72 (B-72). In addition, the measurement of color alteration values revealed a decrease after using MS compared to the standard sample before applying the polymers, with values of ΔE = 1.48 and 1.82 for B-72 polymer and PVA, respectively.

Originality/value

This research provides nanocontainer solutions for removing aged polymers from the glass surface. This makes the current study a promising step for treating archaeological glass.

Details

Pigment & Resin Technology, vol. 54 no. 3
Type: Research Article
ISSN: 0369-9420

Keywords

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