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Article
Publication date: 5 January 2015

N.F. Lokman, F. Suja', H. Abdullah and A.A. Abu Bakar

This purpose of this study is to investigate the structural and morphology of hybrid silver-crosslinked chitosan thin films potentially for surface plasmon resonance (SPR…

Abstract

Purpose

This purpose of this study is to investigate the structural and morphology of hybrid silver-crosslinked chitosan thin films potentially for surface plasmon resonance (SPR) sensor application. Silver, silver-chitosan and silver-crosslinked chitosan (annealed) thin films also were prepared as controls for this study.

Design/methodology/approach

Silver was firstly coated on top of the glass substrate by magnetron sputtering method. Different chitosan solutions (with and without glutaraldehyde) were coated on top of the substrate by spin coating method. Annealing treatment was carried out for one of silver-crosslink chitosan sample. The structural and morphology of all the thin films were studied by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM) and atomic force microscopy (AFM). The SPR curves also were measured by the SPR sensor with air and deionised (DI) water as analytes.

Findings

The structure of silver-crosslinked chitosan thin film presented a monoclinic structure with high crystallinity of 131.71 nm at the prominent peak by XRD analysis. The FESEM and AFM analyses revealed the morphology to be rough in surface attributed to enhanced contact with analytes in SPR measurement compared to other thin films.

Research limitations/implications

In the present study, the glutaraldehyde used to crosslink the thin film increased hydrophobicity and allows for more binding capacity.

Originality/value

The proposed silver-crosslinked chitosan thin film may prove beneficial for biosensing such as in environmental applications by SPR sensor.

Details

Pigment & Resin Technology, vol. 44 no. 1
Type: Research Article
ISSN: 0369-9420

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Article
Publication date: 15 April 2020

Guanzheng Wu, Siming Li, Jiayu Hu, Manchen Dong, Ke Dong, Xiuliang Hou and Xueliang Xiao

This paper aims to study the working principle of the capacitive pressure sensor and explore the distribution of pressure acting on the surface of the capacitor. Herein, a…

Abstract

Purpose

This paper aims to study the working principle of the capacitive pressure sensor and explore the distribution of pressure acting on the surface of the capacitor. Herein, a kind of high sensitivity capacitive pressure sensor was prepared by overlaying carbon fibers (CFs) on the surfaces of the thermoplastic elastomer (TPE), the TPE with high elasticity is a dielectric elastomer for the sensor and the CFs with excellent electrical conductivity were designed as the conductor.

Design/methodology/approach

Due to the excellent mechanical properties and electrical conductivity of CFs, it was designed as the conductor layer for the TPE/CFs capacitive pressure sensor via laminating CFs on the surfaces of the columnar TPE. Then, a ‘#' type structure of the capacitive pressure sensor was designed and fabricated.

Findings

The ‘#' type of capacitive pressure sensor of TPE/CFs composite was obtained in high sensitivity with a gauge factor of 2.77. Furthermore, the change of gauge factor values of the sensor under 10 per cent of applied strains was repeated for 1,000 cycles, indicating its outstanding sensing stability. Moreover, the ‘#' type capacitive pressure sensor of TPE/CFs was consisted of several capacitor arrays via laminating CFs, which could detect the distribution of pressure.

Research limitations/implications

The TPE/CFs capacitive pressure sensor was easily fabricated with high sensitivity and quick responsiveness, which is desirably applied in wearable electronics, robots, medical devices, etc.

Originality/value

The outcome of this study will help to fabricate capacitive pressure sensors with high sensitivity and outstanding sensing stability.

Details

Pigment & Resin Technology, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 0369-9420

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Article
Publication date: 8 November 2019

Dinesh Ramkrushna Rotake, Anand D. Darji and Nitin S. Kale

This paper aims to propose a new microfluidic portable experimental platform for quick detection of heavy metal ions (HMIs) in picomolar range. The experimental setup uses…

Abstract

Purpose

This paper aims to propose a new microfluidic portable experimental platform for quick detection of heavy metal ions (HMIs) in picomolar range. The experimental setup uses a microfabricated piezoresistive sensor (MPS) array of eight cantilevers with ion-selective self-assembled monolayer's (SAM).

Design/methodology/approach

Most of the components used in this experimental setup are battery operated and, hence, portable to perform the on-field experiments. HMIs (antigen) and thiol-based SAM (antibody) interaction start bending the microcantilever. This results in a change of resistance, which is directly proportional to the surface stress produced due to the mass of targeted HMIs. The authors have used Cysteamine and 4-Mercaptobenzoic acid as a thiol for creating SAM to test the sensitivity and identify the suitable thiol. Some of the cantilevers are blocked using acetyl chloride to use as a reference for error detection.

Findings

The portable experimental platform achieves very small detection time of 10-25 min with a lower limit of detection (LOD) 0.762 ng (6.05 pM) for SAM of Cysteamine and 4-Mercaptobenzoic acid to detect Mn2+ ions. This technique has excellent potential and capability to selectively detect Hg2+ ions as low as 2.43 pM/mL using SAM of Homocysteine (Hcys)-Pyridinedicarboxylic acid (PDCA).

Research limitations/implications

As microcantilever is very thin and fragile, it is challenging to apply a surface coating to have selective detection using Nanadispenser. Some of the cantilevers get broken during this process.

Originality/value

The excessive use and commercialization of NPs are quickly expanding their toxic impact on health and the environment. Also, LOD is limited to nanomolar range. The proposed method used the combination of thin-film, NPs, and MEMS-based technology to overcome the limitation of NPs-based technique and have picomolar range of HMIs detection.

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Book part
Publication date: 19 December 2016

Norafni @ Farlina binti Rahim

Islamic finance and Halal product sectors are thriving successfully. This chapter is a general review of the perception of Asian consumers on Islamic finance and Halal…

Abstract

Purpose

Islamic finance and Halal product sectors are thriving successfully. This chapter is a general review of the perception of Asian consumers on Islamic finance and Halal sectors in the global Halal economy.

Methodology/approach

The first section will briefly describe the Halal concept in both Islamic finance and Halal industries, and the growth of both sectors in Asian countries. The second part highlights the review of Asian consumers’ perception towards Islamic finance products and Halal products.

Findings

The review found that the consumers’ perception towards the Islamic finance products and Halal products is distinctive. This is due to the diversity of Asian countries in terms of geography, religion, culture, ethnic, school of thoughts (madzahib), income per capita and government’s involvement.

Originality/value

The third part of the chapter concentrates on planning towards Halal marketing, which involves the move and future challenges in different layers of industries to gear up and strengthen the Halal economy.

Details

Advances in Islamic Finance, Marketing, and Management
Type: Book
ISBN: 978-1-78635-899-8

Keywords

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Article
Publication date: 4 July 2016

Mohammed Borhandden Musah, Hairuddin Mohd Ali, Shafeeq Hussain Vazhathodi al-Hudawi, Lokman Mohd Tahir, Khadijah Binti Daud, Hamdan Bin Said and Naail Mohammed Kamil

This study aims to investigate whether organisational climate (OC) predicts academic staff performance at Malaysian higher education institutions (HEIs). The study equally…

Abstract

Purpose

This study aims to investigate whether organisational climate (OC) predicts academic staff performance at Malaysian higher education institutions (HEIs). The study equally aims at validating the psychometric properties of OC and workforce performance (WFP) constructs.

Design/methodology/approach

Survey questionnaires were administered to 800 academic staff of eight selected HEIs. Principal component analysis, confirmatory factor analysis, full-fledged structural equation modelling and multiple regression analysis were performed to explore the underlying factors and test the factorial validity of the constructs.

Findings

The analysis yielded a five-factor index for the OC construct, whereas the WFP construct comprised two factors. The findings reveal a strong predictive causal effect between OC and WFP. These results suggest that establishing a positive OC enhances academic staff performance. Furthermore, the hypothesised model adds new knowledge to the literature of OC, from the Malaysian context, which could be used to predict WFP at the tertiary level.

Practical implications

The study concludes by discussing the theoretical and practical implications of the findings for HEIs.

Originality/value

This paper makes a significant contribution to the understanding of how OC could be used as an effective instrument in improving academic staff performance in the context of Malaysian HEIs.

Details

Quality Assurance in Education, vol. 24 no. 3
Type: Research Article
ISSN: 0968-4883

Keywords

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Article
Publication date: 9 April 2018

Mohammed Borhandden Musah, Rozanne Emilia Abdul Rahman, Lokman Mohd Tahir, Shafeeq Hussain Vazhathodi Al-Hudawi and Khadijah Daud

The purpose of this paper is to examine the relationship between headteachers and teachers and its effects on the role of trust in Malaysian high-performing schools…

Abstract

Purpose

The purpose of this paper is to examine the relationship between headteachers and teachers and its effects on the role of trust in Malaysian high-performing schools through the dyadic relationship theoretical approach.

Design/methodology/approach

Using a survey questionnaire, a total of 199 teachers from five high-performing schools were selected as respondents for data collection. Before proceeding with inferential statistical analysis, teachers were separated into the “in-group” and “out-group”.

Findings

The findings revealed that the teachers from both the groups perceived that their facets of trust are strongly associated with the type of relationship they have with their school leaders. The results also demonstrate that the quality of dyadic relationships between headteachers and teachers moderately influences teachers’ trust.

Practical implications

The findings suggest that the headteachers should always build good relationships with the teachers to gain teachers’ trust for sustaining school effectiveness. The findings encourage the Ministry of Education, particularly the Teacher Recruitment Division, to require all teachers and headteachers to deepen their knowledge on leader-member exchange (LMX) role-development processes.

Originality/value

The results are of great importance since limited empirical studies have examined LMX role-development processes with reference to teachers and headteachers in the context of Malaysian higher performing schools.

Details

International Journal of Educational Management, vol. 32 no. 3
Type: Research Article
ISSN: 0951-354X

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Article
Publication date: 6 June 2016

Sirilak Bangchokdee and Lokman Mia

This paper aims to examine the role of senior managers’ use of financial and non-financial performance measures in the relationship between decentralization and…

Abstract

Purpose

This paper aims to examine the role of senior managers’ use of financial and non-financial performance measures in the relationship between decentralization and organizational performance in the hotel industry.

Design/methodology/approach

Data were collected using a mailed questionnaire. General Managers in charge of medium-to-large hotels in Thailand completed the questionnaire. In total, 131 general managers, one from each hotel, participated in the study. Path analysis technique was used to test the hypotheses.

Findings

The results indicate that the general managers’ use of financial and non-financial performance measures fully mediates the relationship between the extent of decentralization of decision-making and hotel performance. The results reveal that the decentralization of decision-making alone is not enough to help a hotel improve its performance. Indeed, the relationship between decentralization of decision-making and hotel performance exists only via the general manager’s use of the performance measures. It is contended that a general manager’s use of the performance measures in a hotel encourages department managers to make appropriate decisions to successfully improve their department’s performance which, in turn, leads to increased performance of the hotel.

Originality/value

This study provides empirical evidence indicating how senior managers in hotels with decentralized decision-making could use performance measures to better manage their hotels, thereby improving the hotel’s performance. An in-depth analysis of the data reveals that the senior manager’s use of the non-financial, and not the financial, performance measures is a mediator of the relationship between decentralization of decision-making and hotel performance.

Details

Journal of Accounting & Organizational Change, vol. 12 no. 2
Type: Research Article
ISSN: 1832-5912

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Article
Publication date: 8 June 2021

Lokman Gunduz, Hamad Mohammed Rahman Humaid Alshamsi and Mehmet Yasin Ulukus

This paper aims to examine the per capita income convergence of 57 member countries of the Organization of Islamic Cooperation (OIC) over the period 1990–2017 and to…

Abstract

Purpose

This paper aims to examine the per capita income convergence of 57 member countries of the Organization of Islamic Cooperation (OIC) over the period 1990–2017 and to investigate the determinants of convergence club formations.

Design/methodology/approach

The authors applied the methodology of Phillips and Sul (2007, 2009) to identify the convergence clubs and estimated several-ordered logit models to determine the key drivers.

Findings

The results support existence of two convergence clubs and one diverging unit, indicating that 30 and 26 member countries form two separate groups converging to their own steady-state paths. They also suggest a significant productivity divergence between these clubs. The authors showed that the number of convergence clubs started to decline after the global financial crisis in 2008. Moreover, they found that fixed capital formation, education and political stability are key drivers of convergence club membership.

Practical implications

There is a strong need for large-scale policy interventions to close the gap between leading and lagging clubs of the OIC. A substantial investment in human and physical capital seems necessary for lower-income OIC countries.

Originality/value

This is the first empirical study on the existence of convergence clubs among member countries of the OIC.

Details

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

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Article
Publication date: 10 August 2018

Shabana Talpur, Mohd Lizam and Shafie Mohammad Zabri

The purpose of this paper is to provide an insight into the voluntary corporate governance disclosure and AC practices among Malaysian property listed companies. Along…

Abstract

Purpose

The purpose of this paper is to provide an insight into the voluntary corporate governance disclosure and AC practices among Malaysian property listed companies. Along with that, the influence of AC characteristics on voluntary corporate governance disclosure was also examined.

Design/methodology/approach

The study used the content analysis of annual reports to extract voluntary corporate governance disclosures and audit committee (AC) practices. The relationship between voluntary corporate governance disclosures and AC characteristics was examined by using the panel data regression analysis.

Findings

Based on the results of the study, it can be concluded that all three variables: AC size, AC independence and AC meetings are the factors that influence the level of voluntary corporate governance disclosure among sampled companies.

Practical implications

This study provides an overview of voluntary corporate governance disclosures practices, which have shown an increasing trend of information disclosed by Malaysian listed property companies. Additionally, the AC structure was also found satisfactory with highly independent and higher number of meetings as required by Malaysian Code of Corporate Governance and Bursa Malaysia requirement.

Social implications

By filling the gap identified in this study, investors’ confidence will boost as they will have sufficient information about the Malaysian listed property companies – resulting in strengthening competitiveness and growth by attracting local and foreign investments in the country. The influence of AC attributes over the quality of disclosure among Malaysian listed properties companies is identified, and regulators introduce more explicit rules for AC mechanism for improving the disclosure quality. The increase in the quality of information provided in the annual reports will lead toward highly efficient and transparent stock market.

Originality/value

This study has provided an insight into corporate governance of listed companies in Malaysia, which will contribute to the extended literature. Along with that, it will also provide an overview of corporate governance structure among Malaysian listed companies to the policy makers.

Details

Property Management, vol. 36 no. 5
Type: Research Article
ISSN: 0263-7472

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Article
Publication date: 20 March 2019

Lokman Tutuncu

The purpose of this paper is to examine the effect of pre-acquisition earnings management on the performance of private firm management buyouts.

Abstract

Purpose

The purpose of this paper is to examine the effect of pre-acquisition earnings management on the performance of private firm management buyouts.

Design/methodology/approach

The study examines 291 UK private firms acquired by their managers between 2004 and 2012. Earnings management is investigated by means of cross-sectional discretionary accruals models, and estimated discretionary accruals are regressed on performance changes in the three years following acquisition.

Findings

Management buyouts of private firms are preceded by earnings overstatement and followed by performance deterioration. Private equity sponsored firms engage less in earnings management and remain more profitable than non-sponsored buyouts. Upward earnings managers cease to outperform industry after second post-buyout year, while aggressive earnings managers do not outperform industry at all. Discretionary total accruals are inversely associated with performance changes in the three years after buyout, and explain over 4 per cent of the changes in performance.

Research limitations/implications

Pertinent to the utilisation of private firms and their exemption from publishing cash flow statement, the study relies on accrual-based models for tests of earnings management.

Originality/value

The paper contributes to the mergers and acquisitions literature and value creation debate in buyouts by providing the first tests of earnings management and post-acquisition performance in private firm management buyouts.

Details

Managerial Finance, vol. 45 no. 10/11
Type: Research Article
ISSN: 0307-4358

Keywords

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