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Article
Publication date: 16 July 2019

Akhil Khajuria, Modassir Akhtar, Manish Kumar Pandey, Mayur Pratap Singh, Ankush Raina, Raman Bedi and Balbir Singh

AA2014 is a copper-based alloy and is typically used for production of complex machined components, given its better machinability. The purpose of this paper was to study…

Abstract

Purpose

AA2014 is a copper-based alloy and is typically used for production of complex machined components, given its better machinability. The purpose of this paper was to study the effects of variation in weight percentage of ceramic Al2O3 particulates during electrical discharge machining (EDM) of stir cast AA2014 composites. Scanning electron microscopy (SEM) examination was carried out to study characteristics of EDMed surface of Al2O3/AA2014 composites.

Design/methodology/approach

The effect of machining parameters on performance measures during sinker EDM of stir cast Al2O3/AA2014 composites was examined by “one factor at a time” (OFAT) method. The stir cast samples were obtained by using three levels of weight percentage of Al2O3 particulates, i.e. 0 Wt.%, 10 Wt.% and 20 Wt.% with density 1.87 g/cc, 2.35 g/cc and 2.98 g/cc respectively. Machining parameters varied were peak current (1-30 amp), discharge voltage (30-100 V), pulse on time (15-300 µs) and pulse off time (15-450 µs) to study their influence on material removal rate (MRR), tool wear rate (TWR) and surface roughness (SR).

Findings

MRR and SR decreased with an increase in weight percentage of ceramic Al2O3 particulates at the expense of TWR. This was attributed to increased microhardness for reinforced stir cast composites. However, microhardness of EDMed samples at fixed values of machining parameters, i.e. 9 amp current, 60 V voltage, 90 µs pulse off time and 90 µs pulse on time reduced by 58.34, 52.25 and 46.85 per cent for stir cast AA2014, 10 Wt.% Al2O3/AA2014 and 20 Wt.% Al2O3/AA2014, respectively. SEM and quantitative energy dispersive spectroscopy (EDS) analysis revealed ceramic Al2O3 particulate thermal spalling in 20 Wt.% Al2O3/AA2014 composite. This was because of increased particulate weight percentage leading to steep temperature gradients in between layers of base material and heat affected zone.

Originality/value

This work was an essential step to assess the machinability for material design of Al2O3 reinforced aluminium metal matrix composites (AMMCs). Experimental investigation on sinker EDM of high weight fraction of particulates in AA2014, i.e. 10 Wt.% Al2O3 and 20 Wt.% Al2O3, has not been reported in archival literature. The AMMCs were EDMed at variable peak currents, voltages, pulse on and pulse off times. The effects of process parameters on MRR, TWR and SR were analysed with comparisons made to show the effect of Al2O3 particulate contents.

Details

World Journal of Engineering, vol. 16 no. 4
Type: Research Article
ISSN: 1708-5284

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Article
Publication date: 3 December 2018

William Coffie, Ibrahim Bedi and Mohammed Amidu

This paper aims to investigate the effects of audit quality on the cost of capital in Ghana.

Abstract

Purpose

This paper aims to investigate the effects of audit quality on the cost of capital in Ghana.

Design/methodology/approach

Non-financial firms listed on the Ghana Stock Exchange (GSE) as well as non-listed firms from the database of Ghana Club 100 were included in the sample. Series are yearly, covering a sample of 40 firms during the six-year period, 2008-2013. The study employed the positivist research paradigm to establish the relationship between audit quality and the cost of capital.

Findings

There is evidence to suggest that the cost of debt and the overall cost of capital of firms in Ghana can be explained by the quality of the external auditors. The results also show that the large size of the board is associated with low cost of debt.

Research limitations/implications

The fact that the choice of quality measure is based on firm size only and other measurements of audit quality could not be measured. Future research may examine how other approaches to measuring audit quality affect cost of capital.

Practical implications

The results significant for those charged with assurance and regulation, as well as lenders and managers of companies.

Originality/value

The authors investigate how external auditing quality affects the cost of capital of firms operating in Ghana.

Details

Journal of Financial Reporting and Accounting, vol. 16 no. 4
Type: Research Article
ISSN: 1985-2517

Keywords

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Book part
Publication date: 13 October 2008

Harsh V. Pant

India's engagement with Afghanistan readily became multi-dimensional after the defeat of the Taliban and the installation of an Interim Authority in 2001. This was…

Abstract

India's engagement with Afghanistan readily became multi-dimensional after the defeat of the Taliban and the installation of an Interim Authority in 2001. This was reflected in an immediate upgradation of Indian representation in Afghanistan from Liaison Office to full-fledged Embassy in 2002. India actively participated in the Bonn Conference and was instrumental in the emergence of post-Taliban governing and political authority in Afghanistan. Since then, India's main focus has been to support the Afghan government and the political process in the country as mandated under the Bonn agreement of 2001. It has continued to pursue a policy of high-level engagement with Afghanistan through extensive and wide-ranging humanitarian, financial, and project assistance, and participation in international efforts aimed at political reconciliation and economic rebuilding of Afghanistan.

Details

Conflict and Peace in South Asia
Type: Book
ISBN: 978-1-84950-534-5

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Article
Publication date: 19 June 2019

Manzoor Hassan Malik and Nirmala Velan

The purpose of this paper is to present the growth trends in IT industry after the period of globalization in 1990s and to investigate the short-run and long-run dynamics…

Abstract

Purpose

The purpose of this paper is to present the growth trends in IT industry after the period of globalization in 1990s and to investigate the short-run and long-run dynamics between IT software and service exports, globalization and economic growth in India.

Design/methodology/approach

Annual time series data on IT exports, net national product and openness index have been collected from National Association of Software and Service Companies, the Reserve Bank of India database on Indian economy and the World Bank for the present study. The methodology adopted for studying the first objective are growth trend models, descriptive statistics and graphs prepared on the basis of data from the IT sector. Growth trends in key performance variables, such as total output, export, domestic output and employment have been analyzed. In the case of second objective, vector auto regression model has been used based on variance decomposition and impulse response function to capture the short-run and long-run dynamics between IT exports, globalization and economic growth in India.

Findings

Results of the growth trend model show the relative growth performance of software services receipts shows its strong advancement compared to the other sub-components of current account of balance of payments of India. It is found that economic growth responds positively to the shocks in IT exports and openness of economy. Further, IT software and service exports and openness index contribute to economic growth more in the long-run rather than in the short run.

Research limitations/implications

The IT software and service exports is dynamic field of economic activity amid heavy dependence on both domestic and external economic and political environment; hence, the rate of change is so rapid, and the relevance of factors may change over time.

Practical implications

The paper has implications for achieving sustainability in IT software and service exports growth. It is recommended that economic growth can be enhanced by implementing policies that not only improve the efficiency of the sector but also focus on optimization of the potential of the Indian IT industry.

Originality/value

This paper focuses on originality in delineating the growth trends and analysis of capturing the short-run and long-run dynamics between IT exports, globalization and economic growth in India.

Details

Journal of Science and Technology Policy Management, vol. 10 no. 3
Type: Research Article
ISSN: 2053-4620

Keywords

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Article
Publication date: 21 September 2015

Janusz Marek Smulko, Maciej Trawka, Claes Goran Granqvist, Radu Ionescu, Fatima Annanouch, Eduard Llobet and Laszlo Bela Kish

– This paper aims to present the methods of improving selectivity and sensitivity of resistance gas sensors.

Abstract

Purpose

This paper aims to present the methods of improving selectivity and sensitivity of resistance gas sensors.

Design/methodology/approach

This paper compares various methods of improving gas sensing by temperature modulation, UV irradiation or fluctuation-enhanced sensing. The authors analyze low-frequency resistance fluctuations in commercial Taguchi gas sensors and the recently developed tungsten trioxide (WO3) gas-sensing layers, exhibiting a photo-catalytic effect.

Findings

The efficiency of using low-frequency fluctuations to improve gas detection selectivity and sensitivity was confirmed by numerous experimental studies in commercial and prototype gas sensors.

Research limitations/implications

A more advanced measurement setup is required to record noise data but it will reduce the number of gas sensors necessary for identifying the investigated gas mixtures.

Practical implications

Fluctuation-enhanced sensing can reduce the energy consumption of gas detection systems and assures better detection results.

Originality/value

A thorough comparison of various gas sensing methods in resistance gas sensors is presented and supported by exemplary practical applications.

Details

Sensor Review, vol. 35 no. 4
Type: Research Article
ISSN: 0260-2288

Keywords

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Article
Publication date: 29 June 2018

Jennifer L. Lemanski and Jorge Villegas

The purpose of this paper is to examine the impact of personal relevance, source credibility and advertising appeal type on the emotional and cognitive processing of a…

Abstract

Purpose

The purpose of this paper is to examine the impact of personal relevance, source credibility and advertising appeal type on the emotional and cognitive processing of a direct to consumer pharmaceutical ad for a meningitis vaccine.

Design/methodology/approach

A 2 × 2 experiment was used, and path analysis was undertaken to test the hypotheses.

Findings

Resultant models indicated that unvaccinated (more at risk) and vaccinated (less at risk) participants are persuaded through different pathways. More specifically, vaccinated participants rely more on message credibility than creative strategy to form their cognitive evaluation of the message, whereas non-vaccinated subjects’ cognitive evaluations of the message depend on creative strategy (advertising appeal type) more than message credibility. Differences between individuals who were certain of the vaccine status and those who were not certain of their vaccine status were also apparent. Implications and areas for future research are also presented.

Practical implications

When using direct to consumer pharmaceutical ad for a vaccine, advertisers should take into account the perceived risk level of and relevance to audience members.

Originality/value

Personal relevance and risk are issues which impact the effectiveness of different types of advertising appeals, but less prior research has focused on this aspect of the target audience for direct to pharmaceutical vaccine advertisements.

Details

International Journal of Pharmaceutical and Healthcare Marketing, vol. 12 no. 2
Type: Research Article
ISSN: 1750-6123

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Article
Publication date: 4 December 2017

Sonal Agarwal, Ginni Chawla and Rupali Singh

The purpose of this study is to develop innovations in human resource (InHR) framework in the context of Indian banking industry and further develop a scale for its measurement.

Abstract

Purpose

The purpose of this study is to develop innovations in human resource (InHR) framework in the context of Indian banking industry and further develop a scale for its measurement.

Design/methodology/approach

A non-response bias test is conducted on a sample of 300 employees, and the assumptions of constant variance, outliers and normality are tested. Further, the InHR scale is validated through exploratory factor analysis (EFA) and confirmatory factor analysis (CFA) tests.

Findings

EFA confirms the existence of five empirically distinct constructs at banking industry in India, and CFA affirms the dependability of the arrived constructs. It is concluded that the InHR framework constructs possess high reliability and validity.

Research limitations/implications

The authors duly recognize the limitations of survey-based research, the exploratory research design and the use of single method.

Practical implications

The proposed InHR scale and its constructs are an important input to guide managers and human resources (HR) policymakers to devise strategies for the Indian banking industry. Banks can also benchmark existing HR policies by applying the proposed InHR framework constructs.

Social implications

The InHR constructs provide academicians and practitioners with a better approach of understanding the InHR practices.

Originality/value

Despite the significance of Indian banking industry for the socio-economic capital, academic research focusing on this industry’s innovative practices has been limited. This study reveals originality and value by proposing an InHR framework in the context of Indian banking industry which integrates all the major innovative practices. Further a scale has been developed for its measurement.

Details

International Journal of Innovation Science, vol. 9 no. 4
Type: Research Article
ISSN: 1757-2223

Keywords

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