S.B. Mishra, Kamlesh Chandra and Satya Prakash
The purpose of this study is to investigate the application of Ni3Al coating for boilers and other power plant equipment, which suffer severe erosion-corrosion problems resulting…
Abstract
Purpose
The purpose of this study is to investigate the application of Ni3Al coating for boilers and other power plant equipment, which suffer severe erosion-corrosion problems resulting in substantial losses. Currently, superalloys are being used to increase the service life of the boilers. Although the superalloys have adequate mechanical strength at elevated temperature, they often lack resistance to erosion-corrosion environments.
Design/methodology/approach
In this paper, the erosion-corrosion performance of plasma-sprayed nickel aluminide (Ni3Al) coating on nickel- and iron-based superalloys have been evaluated by exposing them to the low temperature primary superheater zone of the coal-fired thermal power plant at the temperature zone of 540°C for ten cycles of 100 h duration. The exposed products were analysed along the surface and cross-section using scanning electron microscopy (SEM), X-ray diffraction (XRD) and electron micro probe analysis (EPMA).
Findings
The XRD, SEM and EPMA analyses have shown the formation of mainly NiO, NiAl2O4 and indicated the presence of Ni3Al, Ni and Al2O3. In the boiler environment, Ni3Al coating partially oxidizes and acts as a perfect barrier against erosion-corrosion of superalloys. The partially oxidised Ni3Al coating remains intact even after 1,000 h cycle exposure.
Originality/value
The probable mechanism of attack for the plasma-sprayed Ni3Al coating in the given boiler environment is presented.
Details
Keywords
Chandra S. Mishra and James F. Nielsen
Outlines previous research on the links between board composition, firm performance and chief executive officer (CEO) compensation, and presents a study of CEO pay‐performance…
Abstract
Outlines previous research on the links between board composition, firm performance and chief executive officer (CEO) compensation, and presents a study of CEO pay‐performance sensitivity, board independence and performance in the US banking industry. Explains the methodology and presents the results, suggesting that for large bank holding companies with average performance, increased board independence reduces pay‐performance sensitivity because internal monitoring is sufficient without extra alignment incentives. Adds that when performance is poor this no longer holds true and compensation contracts are then used to align the interests of managers and shareholders.
Details
Keywords
Ishani Sharma, Weng Marc Lim and Arun Aggarwal
With a growing preference for active, authentic, and cultural experiences over traditional ones, creative tourism has garnered significant academic interest. This study offers a…
Abstract
Purpose
With a growing preference for active, authentic, and cultural experiences over traditional ones, creative tourism has garnered significant academic interest. This study offers a comprehensive review of creative tourism research, delineating its evolution, prominent contributors, pivotal areas, and prospective trajectories through a bibliometric analysis.
Design/methodology/approach
Employing a bibliometric analysis using the biblioshiny and VOSviewer software, this study systematically reviews 198 articles on creative tourism identified and retrieved from the Scopus database.
Findings
A notable increase in creative tourism research is witnessed in recent times, with Portugal and the Netherlands leading in publications and citations, respectively. This review also pinpoints key authors, countries, institutions, and journals shaping the field, and presents emerging themes such as authenticity and creative experience, culture and heritage, urban and rural contexts, and co-creation in creative tourism.
Practical implications
Identifying core research contributors (authors, countries, institutions, journals) and contributions (themes, topics) assists academics in seeking collaborations and shaping future research. Practitioners are advised to adapt these trends (authenticity, co-creation, sustainability) into their strategic planning to meet market demands.
Originality/value
This study offers a seminal review of creative tourism through a bibliometric analysis, a technique that leverages the power of technology (data, software) to engage in retrospection and projection—the hallmark of benchmarking studies across fields, including tourism. Noteworthily, this study provides a detailed summary of the field’s trajectory and significant trends, positioning itself as an essential reference for academic scholars, industry professionals, and policymakers with a keen interest in creative tourism.
Details
Keywords
Peter Prakash F., Muthukannan Duraiselvam, Natarajan S. and Kannan Ganesa Balamurugan
This paper aims to investigate the effect of laser surface texturing (LST) on the wear behavior of C-263 nickel-based superalloy and to identify the optimum wear operating…
Abstract
Purpose
This paper aims to investigate the effect of laser surface texturing (LST) on the wear behavior of C-263 nickel-based superalloy and to identify the optimum wear operating condition.
Design/methodology/approach
C-263 nickel-based superalloy was selected as substrate material and pico-second Nd-YAG laser was used to fabricate the waviness groove texture on their surface. Wear experiments were designed based on Box-Bhenken design with three factors of sliding velocity, sliding distance and applied load. Wear experiments were performed using pin on disc tribometer. Morphologies of textures and worn-out surfaces were evaluated by scanning electron microscopy and energy dispersive spectroscopy. Surface topographies and surface roughness of the textures were evaluated by weight light interferometry. The response surface methodology was adopted to identify the optimum wear operating condition and ANOVA to identify the significant factors.
Findings
LST improves the wear resistance of C-263 nickel-based superalloy by appeoximately 82 per cent. Higher wear rate occurs at maximum values of all operating conditions, and applied load affects the coefficient of friction. Applied load significantly affects the wear rate of un-textured specimen. The interaction of sliding velocity and applied load also affects the wear rate of textured specimens. The optimum parameters to get minimum wear rate for un-textured specimens are 1.5 m/s sliding velocity, 725 m sliding distance and 31 N of applied load. For textured specimens, the optimum values are 1.5 m/s sliding distance, 500 m sliding distance and 40 N of the applied load.
Originality/value
Literature on laser texturing on nickel-based superalloy is very scarce. Specifically, the effect of laser texturing on wear behavior of the nickel-based superalloy C-263 alloy is not yet reported.
Details
Keywords
Bukola Joseph Babalola, Ojo Jeremiah Akinribide, Olukayode Samuel Akinwamide and Peter Apata Olubambi
During the operation of nickel-based alloys as blades and discs in turbines, the sliding activity between metallic surfaces is subjected to structural and compositional changes…
Abstract
Purpose
During the operation of nickel-based alloys as blades and discs in turbines, the sliding activity between metallic surfaces is subjected to structural and compositional changes. In as much as friction and wear are influenced by interacting surfaces, it is necessary to investigate these effects. This study aims to understand better the mechanical and tribological characteristics of Ni-17Cr-10X (X = Mo, W, Ta) ternary alloy systems developed via spark plasma sintering (SPS) technique.
Design/methodology/approach
Nickel-based ternary alloys were fabricated via SPS technique at 50 MPa, 1100 °C, 100 °C/min and a dwell time of 10 mins. Scanning electron microscopy, X-Ray diffraction, energy dispersive X-ray spectroscopy, nanoindentation techniques and tribometer were used to assess the microstructure, phase composition, elemental dispersion, mechanical and tribological characteristics of the sintered nickel-based alloys.
Findings
The outcome of the investigation showed that the Ni-17Cr10Mo alloy exhibited the highest indentation hardness value of 8045 MPa, elastic modulus value of 386 GPa and wear resistance. At the same time, Ni-17Cr10W possessed the least mechanical and wear properties.
Originality/value
It can be shown that the SPS technique is efficient in the development of nickel-based alloys with good elemental distribution and without defects such as segregation of alloying elements, non-metallic inclusions. This is evident from the scanning electron microscopy micrographs.
Details
Keywords
Pooja Kumari and Chandra Sekhar Mishra
This study aims to investigate how the intangible intensive nature of firms affects the value relevance of earnings and the book value of equity between profit- and loss-reporting…
Abstract
Purpose
This study aims to investigate how the intangible intensive nature of firms affects the value relevance of earnings and the book value of equity between profit- and loss-reporting firms. The study also examines how firms’ intangible intensity affects the value relevance of R&D outlays between profit- and loss-reporting firms.
Design/methodology/approach
An empirical analysis based on Ohlson’s (1995) framework is used. A total of 54,421 firm-year observations of Indian listed firms from financial years 1992–2016 constitute the study sample.
Findings
The findings suggest that the difference in the value relevance of earnings and the book value of equity between profit- and loss-reporting firms is more significant in non-intangible intensive firms than in intangible firms. Specifically, earnings are more value relevant in profit-reporting and non-intangible intensive firms, whereas book value of equity is more value relevant in loss-reporting and intangible intensive firms. The results also suggest that the difference in the incremental value relevance of R&D information between profit- and loss-making firms is higher in intangible intensive firms than in non-intangible intensive firms.
Practical implications
The findings of this study can help managers, standard-setters and investors make effective decisions.
Originality/value
This study offers insights into the impact of intangible intensity on the value relevance of aggregated and disaggregated accounting information between profit- and loss-making firms in institutional settings where capitalization of R&D expenditures is allowed.
Details
Keywords
Pooja Kumari and Chandra Sekhar Mishra
This paper aims to examine the impact of the intangible intensity of the firm on the relevance of research and development (R&D) information to determine equity values in India…
Abstract
Purpose
This paper aims to examine the impact of the intangible intensity of the firm on the relevance of research and development (R&D) information to determine equity values in India. Additionally, the study compares the association of input information on R&D investment (the reported R&D cost) and output information on R&D investment (patent count) with equity values. Further, the study also examines the operational nature of the firm and patent count, which is the better proxy to measure the intangible intensity of the firm.
Design/methodology/approach
The authors compared the explanatory power of R&D information between intangible and non-intangible intensive firms. To estimate the value relevance of R&D information, the authors followed the statistical model based on the theoretical framework of the residual income model.
Findings
The results indicate that there is a significant moderating impact of the intangible intensity of the firm on the relevance of R&D information to determine equity values in India over the 25 years study period (from 1991 to 2016). Further, in India, the study finds that the input information of R&D outlay is more relevant than output information on R&D outlay to determine equity values, irrespective of the proxy measure of intangible intensity. Moreover, the study finds that the operational nature of the firm is a better proxy of the intangible intensity of the firm compared to patent counts.
Research limitations/implications
In this study, pooled cross-sectional data were used for analysis. In the future, longitudinal and panel data can be used for more insightful results.
Practical implications
The findings of the study provide direction to investors and creditors to find the intrinsic value of the investments in internally developed intangible assets, which will reduce the asymmetry between the market value and accounting value of equity.
Originality/value
The paper offers insights into the impact of intangible intensity on the relevance quality of R&D information in an emerging country.
Details
Keywords
Chandra Shekhar Pandey, Shri Ram Pandey, Patanjali Mishra and Shweta Pandey
The purpose of the study was to develop and validate a scale for measuring epistemic trust in open educational resources (OERs).
Abstract
Purpose
The purpose of the study was to develop and validate a scale for measuring epistemic trust in open educational resources (OERs).
Design/methodology/approach
A mixed methods approach was employed, using both qualitative and quantitative methods. The scale development involved several stages, including various iterations of exploratory factor analysis and confirmatory factor analysis (CFA).
Findings
The study resulted in a valid and reliable nine-factor scale for measuring epistemic trust in OERs. These factors are reliability and credibility of information, source competence and expertise, goodwill and intentions of the source, transparency and openness, consistency and stability, accessibility and usability, peer and social validation, engagement and interaction and ethical and moral integrity. The CFA confirmed the nine-factor structure and showed good model fit. Cronbach’s alpha coefficients for the dimensions ranged from 0.668 to 0.823, indicating acceptable to excellent internal consistency. Extracted (AVE) value for each factor indicates the strong convergent validity of the scale.
Research limitations/implications
The study’s focus is on measuring epistemic trust of university students in OERs.
Practical implications
By providing a reliable and valid instrument to measure epistemic trust in OERs, the study provides a practical approach for OER creation, curation and use.
Social implications
The study proposes a framework for combating misinformation by providing a scale to assess the epistemic trust in OERs.
Originality/value
To the best of the authors’ knowledge, this is the first study to develop a comprehensive scale specifically designed to measure epistemic trust in OERs.
Details
Keywords
Pooja Kumari and Chandra Sekhar Mishra
Fundamental shifting of the world toward intangible intensive economy raised an apprehension regarding value relevance of internally generated intangible assets. In the previous…
Abstract
Purpose
Fundamental shifting of the world toward intangible intensive economy raised an apprehension regarding value relevance of internally generated intangible assets. In the previous studies, research and development (R&D) expenditure is recognized as a significant accounting item, which can indicate potential internally generated intangible assets. This study aims to examine whether investors consider nature of intangible intensity of a firm for the evaluation of R&D expenditure to determine equity values in India.
Design/methodology/approach
The authors compared value relevance of capitalized and the expensed portion of R&D expenditure between intangible- and non-intangible-intensive firms. They adopted empirical model grounded on the generalized version of Ohlson’s (1995) model.
Findings
The findings of the study indicate that, in intangible-intensive (non-intangible) firms, the capitalized portion of expenditure is positively (negatively) significant and the expensed portion of R&D expenditure is negatively (positively) significant to explain equity values.
Practical implications
The findings of this study may have potential implication for the discussion on the accounting treatment of internally generated intangible assets based on the nature of intangible intensity of the firm. The study also suggests that while setting standards, standard-setters should consider nature of intangible intensity of the firm, which could disseminate the discrepancy between the market and book value of the equity.
Originality/value
The study provides evidence, how value relevance of R&D reporting is affected by the nature of intangible intensity of a firm.