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Article
Publication date: 19 June 2019

Kasif Teker, Yassir A. Ali and Ali Uzun

This study aims to investigate photosensing characteristics of SiC and GaN nanowire-based devices through exposure to UV light. The photocurrent transients have been modeled to…

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Abstract

Purpose

This study aims to investigate photosensing characteristics of SiC and GaN nanowire-based devices through exposure to UV light. The photocurrent transients have been modeled to determine rise and decay process time constants. The 1D-semiconductor nanowires can exhibit higher light sensitivity compared to bulk materials because of their large surface area to volume ratio and the quantum size effects.

Design/methodology/approach

Nanowire devices have been fabricated through dielectrophoresis for integrating nanowires onto pre-patterned electrodes (10 nm Ti/ 90 nm Au) with a spacing about 3 µm onto SiO2/Si (doped) substrate. The photocurrent measurements were carried out under room temperature conditions with UV light of 254 nm wavelength.

Findings

SiCNWs yield very short rise and decay time constants of 1.3 and 2.35 s, respectively. This fast response indicates an enhanced surface recombination of photoexcited electron-hole pairs. Conversely, GaNNWs yield longer rise and decay time constants of 10.3 and 15.4 s, respectively. This persistent photocurrent suggests a reduced surface recombination process for the GaNNWs.

Originality/value

High selective UV light sensitivity, small size, very short response time, low power consumption and high efficiency are the most important features of nanowire-based devices for new and superior applications in photodetectors, photovoltaics, optical switches, image sensors and biological and chemical sensing.

Book part
Publication date: 7 January 2015

This chapter examines corporate governance–related financial reporting issues in the context of globalization. Over the past few decades, the process of globalization has…

Abstract

This chapter examines corporate governance–related financial reporting issues in the context of globalization. Over the past few decades, the process of globalization has substantially altered the fields of corporate governance and accounting. More specifically, Anglo-American models of corporate governance and financial reporting have received increasing momentum in emerging economies, including China. However, a review of relevant studies suggests that there is limited research examining the implementation of Anglo-American concepts in various countries regardless of their growing acceptance. This monograph extends the existing literature by comprehensively investigating the adoption of internationally acceptable principles and standards in China, the largest transitional economy that has different institutional context from Anglo-American countries. In addition, the review has a number of implications for developing the theoretical framework, and determining the research methodology for the monograph.

Details

Adoption of Anglo-American Models of Corporate Governance and Financial Reporting in China
Type: Book
ISBN: 978-1-78350-898-3

Keywords

Article
Publication date: 19 December 2018

Yakup Uzun, Halim Kovacı, Ali Fatih Yetim and Ayhan Çelik

This paper aims to investigate the effects of boriding on the structural, mechanical and tribological properties of CoCrW dental alloy manufactured by the method of selective…

Abstract

Purpose

This paper aims to investigate the effects of boriding on the structural, mechanical and tribological properties of CoCrW dental alloy manufactured by the method of selective laser melting.

Design/methodology/approach

In this study, CoCrW alloy samples that are used in dentistry were manufactured by the method of laser melting, and boriding treatment was made on the samples at 900°C and 1,000°C for 1, 4 and 8 h. The structural, mechanical and tribological effects of boriding on the samples were analyzed using X-ray diffraction, scanning electron microscopy, energy dispersive X-ray spectroscopy, microhardness and an abrasion test device.

Findings

According to the results, the best outcomes in terms of abrasion strength and hardness were obtained in the sample that was subjected to boriding at 1,000°C for 4 h.

Originality/value

This study produced CoCrW alloys, which are fundamental biomaterials that are used in dentistry, by a different production method called selective laser melting and improved their surface characteristics by boriding.

Details

Industrial Lubrication and Tribology, vol. 71 no. 3
Type: Research Article
ISSN: 0036-8792

Keywords

Article
Publication date: 2 October 2018

Tugrul Oktay, Seda Arik, Ilke Turkmen, Metin Uzun and Harun Celik

The aim of this paper is to redesign of morphing unmanned aerial vehicle (UAV) using neural network for simultaneous improvement of roll stability coefficient and maximum…

Abstract

Purpose

The aim of this paper is to redesign of morphing unmanned aerial vehicle (UAV) using neural network for simultaneous improvement of roll stability coefficient and maximum lift/drag ratio.

Design/methodology/approach

Redesign of a morphing our UAV manufactured in Faculty of Aeronautics and Astronautics, Erciyes University is performed with using artificial intelligence techniques. For this purpose, an objective function based on artificial neural network (ANN) is obtained to get optimum values of roll stability coefficient (Clβ) and maximum lift/drag ratio (Emax). The aim here is to save time and obtain satisfactory errors in the optimization process in which the ANN trained with the selected data is used as the objective function. First, dihedral angle (φ) and taper ratio (λ) are selected as input parameters, C*lβ and Emax are selected as output parameters for ANN. Then, ANN is trained with selected input and output data sets. Training of the ANN is possible by adjusting ANN weights. Here, ANN weights are adjusted with artificial bee colony (ABC) algorithm. After adjusting process, the objective function based on ANN is optimized with ABC algorithm to get better Clβ and Emax, i.e. the ABC algorithm is used for two different purposes.

Findings

By using artificial intelligence methods for redesigning of morphing UAV, the objective function consisting of C*lβ and Emax is maximized.

Research limitations/implications

It takes quite a long time for Emax data to be obtained realistically by using the computational fluid dynamics approach.

Practical implications

Neural network incorporation with the optimization method idea is beneficial for improving Clβ and Emax. By using this approach, low cost, time saving and practicality in applications are achieved.

Social implications

This method based on artificial intelligence methods can be useful for better aircraft design and production.

Originality/value

It is creating a novel method in order to redesign of morphing UAV and improving UAV performance.

Details

Aircraft Engineering and Aerospace Technology, vol. 90 no. 8
Type: Research Article
ISSN: 1748-8842

Keywords

Abstract

Details

Corporate Fraud Exposed
Type: Book
ISBN: 978-1-78973-418-8

Article
Publication date: 5 December 2016

Mehmet Ozkaymak, Selcuk Selimli, Durmus Kaya and Umit Uzun

The purpose of this paper is to study the fertility potential of the iron- and steel-making process waste granulated blast furnace slag to recover it as a beneficial product.

Abstract

Purpose

The purpose of this paper is to study the fertility potential of the iron- and steel-making process waste granulated blast furnace slag to recover it as a beneficial product.

Design/methodology/approach

This slag fertilizer was mixed with organic fertilizer to enrich and dung the vegetable sets are pepper, lettuce and cucumbers.

Findings

In this study, 100 per cent granulated slag, 75 per cent granulated slag + 25 per cent fermented manure, 50 per cent granulated slag + 50 per cent fermented manure and 25 per cent granulated slag + 75 per cent fermented manure compositions were mixed with water and added to seeding pots. The growth rate of vegetable sets and also the level of contamination of heavy metals such as lead, copper, aluminum, mercury and cadmium were analyzed. The analyses results showed that contamination rates of lead, copper, aluminum, mercury and cadmium in lettuce and cucumber samples were in the range of acceptable levels for human health. Slag fertilizer enforced the set of growth rate and productivity, too.

Originality/value

By the recovery of the waste slag storage, transport and annihilation economical load on the industry would be eliminated, waste recovery contributes to the economical gaining and beneficial recovered products replace the need of fertility products.

Details

World Journal of Engineering, vol. 13 no. 6
Type: Research Article
ISSN: 1708-5284

Keywords

Book part
Publication date: 18 November 2020

Meral Erdirençelebi

In recent years, preparations for the transition from the Post-industrial society to Community 5.0 have been continuing at full speed. The change in this process necessitates…

Abstract

In recent years, preparations for the transition from the Post-industrial society to Community 5.0 have been continuing at full speed. The change in this process necessitates changes in the roles and structure of the labour force in societies. While work and family living spaces of the individual change the dimensions of his/her interaction, they increase the importance of work–family life balance gradually. The basis of conflicts (imbalances) in roles in work and family life is based on three pillars: time, tension and behaviour. The conflicts in the work and family life spaces take place in two sub-dimensions, namely ‘work-family conflict’ which is directed from work to family and ‘family-work conflict’ which is directed from family to work. The conflict between work and family life leads to individual, organisational and familial consequences. Effective communication with the social support of the organisation and the members of family is of great importance for individuals not to experience a work–family conflict.

Details

Contemporary Global Issues in Human Resource Management
Type: Book
ISBN: 978-1-80043-393-9

Keywords

Article
Publication date: 16 December 2019

Amal Hamrouni, Ali Uyar and Rim Boussaada

The purpose of this paper is to test whether or not CSR disclosure (i.e. aggregate as well as its three sub-indicators) reduces the cost of debt for French corporations listed in…

1966

Abstract

Purpose

The purpose of this paper is to test whether or not CSR disclosure (i.e. aggregate as well as its three sub-indicators) reduces the cost of debt for French corporations listed in the SBF 120 index between 2010 and 2015.

Design/methodology/approach

CSR disclosure ratings of firms were collected from the Bloomberg database under three dimensions such as environmental, social and governance (ESG). Then, a pooled regression analysis was run.

Findings

The results indicate that overall CSR disclosure score as a combination of ESG disclosure scores has a negative effect on the cost of debt (i.e. lowers the cost of debt). While environmental disclosure is negatively associated with the cost of debt, social disclosure is unexpectedly positively associated, and governance disclosure has an insignificant association with the cost of debt.

Research limitations/implications

The study has two main limitations. First, the analysis does not consider contractual constraints and obligations that might exist in debt contracts (Jung et al., 2018). Second, the analyses cover a specific time period (i.e. between 2010 and 2015) for a specific country (i.e. France) excluding utilities and the financial sector.

Practical implications

Overall, it is inferred from the results that financial markets for lenders take into account CSR disclosure when assessing the creditworthiness of borrowers. Specifically, environmental disclosure is the only subdimension of CSR that is influential on creditors’ decisions to offer favorable interest rates. In line with this outcome, companies can assess their processes and be more aligned with eco-friendly practices, and investors are particularly advised to invest in those types of firms.

Originality/value

This study extends scant literature on the association between CSR and the cost of debt by exploring how creditors treat CSR dimensions dissimilarly in granting loans to firms. The findings of this study have particular importance as financial debt is one of the most predominant forms of external financing.

Details

Management Decision, vol. 58 no. 2
Type: Research Article
ISSN: 0025-1747

Keywords

Open Access
Article
Publication date: 3 March 2021

Ali Asgar and Rampelli Satyanarayana

This paper seeks to ascertain the effectiveness of a two-week-long faculty development programme (FDP), organized by Indira Gandhi National Open University (IGNOU), for teachers…

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Abstract

Purpose

This paper seeks to ascertain the effectiveness of a two-week-long faculty development programme (FDP), organized by Indira Gandhi National Open University (IGNOU), for teachers of the open and distance learning (ODL) system, with the aim of upgrading their knowledge and skills for developing print self-learning materials (SLMs). The specific aim of this study is to ascertain whether the objectives of the FDP have been achieved, to examine the effectiveness of the training programme and to suggest measures for improvement in future FDPs regarding the design and development of print SLMs.

Design/methodology/approach

The study was conducted using a descriptive survey research method, through semi-structured questionnaires and adopted purposive sampling. The first survey was conducted immediately after the completion of the programme, in order to collect feedback from the trainees, while the second survey was conducted after six months of the FDP, using the follow-up approach, so that more reliable and authentic results could be obtained.

Findings

The outcomes of the study revealed that the training had been effective in imparting appropriate knowledge and skills to the trainees, with respect to designing print SLMs. However, certain gaps were also identified and have been reported in this paper. Key suggestions have been made to address the shortcomings and improve forthcoming FDPs.

Research limitations/implications

The present research focused on a specific training programme regarding the design and development of SLMs. Therefore, only the teachers and academics who participated in this specialized training activity were considered for the collection of feedback.

Practical implications

The recommendations of this work may be useful for the trainers, FDP coordinators, training institutions and ODL policymakers for planning and designing effective staff development activities for teachers and academics working in ODL institutions. These would be especially useful in the design of FDPs, aimed at orienting teachers who are involved in curriculum planning, design and development of learning resources.

Originality/value

This study is an original research based on the empirical primary data obtained by the researchers. As the largest open university in the world, IGNOU has been playing a key role in staff development for and in ODL in developing countries. This evaluative study of a specialized FDP in the area of SLM design and development is a significant work that may be valuable for planning the staff development strategies and building a training evaluation mechanism.

Details

Asian Association of Open Universities Journal, vol. 16 no. 1
Type: Research Article
ISSN: 1858-3431

Keywords

Article
Publication date: 1 January 2012

Habib Jouber and Hamadi Fakhfakh

This paper attempts to investigate the relationships between the board of directors' characteristics and earnings management being a proxy of earnings quality in two separate…

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Abstract

Purpose

This paper attempts to investigate the relationships between the board of directors' characteristics and earnings management being a proxy of earnings quality in two separate countries, France and Canada. Specifically, it aims to investigate how certain contextual features affect differently earnings management behavior, and to reveal which factors are the most prominent incentives of management discretion in both cases.

Design/methodology/approach

The paper uses a performance matched discretionary accruals (PMDA) measure as a proxy for earnings management. Three separate panel‐regressions are then performed on a full sample, comprising a French sub‐sample and a Canadian sub‐sample, to detect board characteristics and institutional features' impacts on the PMDA. Regressions are based on a panel of 180 French and Canadian listed firms' data over the period 2006‐2008.

Findings

Evidence shows that CEO stock ownership, independent monitoring and institutional investor's property are strong earnings management determinants in both the French and Canadian frameworks. Nevertheless, leadership structure and board size seem to be neutral. Furthermore, French firms show specific earnings management incentives which are related to high ownership concentration, low equity widespread and high contractual debt costs. Dominant minority ownership and capital market forces are the key earnings management incentives in the Canadian context. These findings are robust to alternative sensitivity tests.

Research limitations/implications

Even though the findings answer some questions, earnings management incentives are still to be decided. Future research could further highlight the impact of contractual, legal, cultural, ethical and political country‐specific factors related to financial reporting.

Originality/value

This paper investigates how an effective board of directors is able to provide a monitoring mechanism to ensure high quality of earnings. Moreover, it builds on cross‐country variations in corporate governance features and contextual‐specific factors to reveal earnings management behavior's incentives in two separate environments, namely French and Canadian ones. The underlying promise is that poor corporate governance (weak board monitoring), high ownership concentration, and intensive financial market forces create incentives that largely influence manager's willingness to report earnings that don't reflect a firm's true performance.

Details

Managerial Auditing Journal, vol. 27 no. 1
Type: Research Article
ISSN: 0268-6902

Keywords

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