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Article
Publication date: 18 June 2020

Kazeem Babawale Kasali, Yusuf Olatunji Tijani, Matthew Oluwafemi Lawal and Yussuff Titilope Lawal

In this paper, we studied the steady flow of a radiative magnetohydrodynamics viscoelastic fluid over an exponentially stretching sheet. This present work incorporated the effects…

81

Abstract

Purpose

In this paper, we studied the steady flow of a radiative magnetohydrodynamics viscoelastic fluid over an exponentially stretching sheet. This present work incorporated the effects of Soret, Dufour, thermal radiation and chemical reaction.

Design/methodology/approach

An appropriate semi-analytical technique called homotopy analysis method (HAM) was used to solve the resulting nonlinear dimensionless boundary value problem, and the method was validated numerically using a finite difference scheme implemented on Maple software.

Findings

It was observed that apart from excellence agreement with the results in literature, the results obtained gave further insights into the behaviour of the system.

Originality/value

The purpose of this research is to investigate heat and mass transfer profiles of a MHD viscoelastic fluid flow over an exponentially stretching sheet in the influence of chemical reaction, thermal radiation and cross-diffusion which are hitherto neglected in previous studies.

Details

Multidiscipline Modeling in Materials and Structures, vol. 16 no. 6
Type: Research Article
ISSN: 1573-6105

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Article
Publication date: 22 November 2011

Aragudige Nagaraja, K.C. Gangadhar and M. Vasanthakumar

Library consortia have played a vital role in sharing information resources among participating libraries. In India, engineering college libraries subscribe to many electronic…

623

Abstract

Purpose

Library consortia have played a vital role in sharing information resources among participating libraries. In India, engineering college libraries subscribe to many electronic resources through the Indian Digital Library of Engineering Science and Technology (INDEST) consortium. This paper aims to identify the collection development of electronic resources through INDEST to predict the most required and useful model for engineering colleges.

Design/methodology/approach

The list of colleges that subscribe to electronic resources through INDEST was studied online and analyzed.

Findings

It is evident that most colleges only subscribed IEL online through INDEST. Some colleges have subscribed to different resources from more than one publisher. The bundles of resources subscribed through INDEST have not fully supported all the courses offered by the institutions. It is revealed that the bibliographical databases for searching the literature in technological sciences were not subscribed to by any colleges participating in INDEST.

Originality/value

The results of this study are useful for engineering college libraries to develop the collection of online journals in the digital era.

Details

Library Hi Tech, vol. 29 no. 4
Type: Research Article
ISSN: 0737-8831

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Article
Publication date: 4 February 2021

Venkata Subba Rao M., B.J. Gireesha, Kotha Gangadhar, Manasa Seshakumari P. and S. Sindhu

This paper aims to address the magnetohydrodynamic boundary layer flow of hybrid mixture across a stretching surface under the influence of electric field.

178

Abstract

Purpose

This paper aims to address the magnetohydrodynamic boundary layer flow of hybrid mixture across a stretching surface under the influence of electric field.

Design/methodology/approach

The local similarity transformations are implemented to reformulate the governing partial differential equations into coupled non-linear ordinary differential equations of higher order. The numerical solutions are obtained for the simplified governing equations with the aid of finite difference technique.

Findings

The velocity, temperature and entropy generation are examined thoroughly for the effects of different budding parameters related to present analysis by means of graphs. It is obtained that owing to the effect of magnetic field along with slip factor, the fluid motion slowdown. However, the flow velocity enhances for the rising estimations of an electric field which tends to resolve sticky effects.

Originality/value

The three-dimensional plots are drawn to understand the nature of physical quantities. To ensure the precision, the obtained solutions are compared with the existing one for certain specific conditions. A good concurrence is observed between the proposed results and previously recorded outcomes.

Details

International Journal of Numerical Methods for Heat & Fluid Flow, vol. 31 no. 6
Type: Research Article
ISSN: 0961-5539

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Article
Publication date: 19 October 2022

Prachi Vinod Ingle and Gangadhar Mahesh

The success of construction projects can be indicated by measuring their performance. For effective project performance (PP), the successful execution of a construction projects…

155

Abstract

Purpose

The success of construction projects can be indicated by measuring their performance. For effective project performance (PP), the successful execution of a construction projects is very important. A systematic review of the literature on performance areas and performance assessment models was undertaken. The purpose of this paper is to develop a mathematical formulation for construction PP areas to suit the Indian context by modifying the current project quarterback rating (PQR) model.

Design/methodology/approach

Based on the literature, the PQR model has not been validated for suitability in the Indian context. To validate the PQR model and modify the same for the Indian context, a survey instrument was used to collect data on performance areas and a multivariate data analysis technique was carried out to develop a modified model. Delphi technique was used to assign the weights for each performance metric in performance areas.

Findings

This study concluded the importance of three additional performance areas, namely, productivity, stakeholder satisfaction and environment for assessing PP for Indian construction projects. It also identified the interrelationship between the performance areas and the PP.

Practical implications

The developed modified PQR model (MPQR) will guide the concerned stakeholders to take corrective actions for improving the performance of construction projects.

Originality/value

The MPQR proposed in this paper covers ten areas and is a comprehensive single score that can be used to benchmark and compare performance over different projects to achieve continuous improvement.

Details

Journal of Facilities Management , vol. 22 no. 4
Type: Research Article
ISSN: 1472-5967

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Article
Publication date: 23 November 2018

Gangadhar Kotha, Keziya Kukkamalla and S.M. Ibrahim

The purpose of this paper is to examine the magneto hydrodynamic flow and heat transfer of nanofluids over a permeable wedge based on engine oil which is under the effects of…

79

Abstract

Purpose

The purpose of this paper is to examine the magneto hydrodynamic flow and heat transfer of nanofluids over a permeable wedge based on engine oil which is under the effects of thermal radiation and convective heating.

Design/methodology/approach

The equations governing the flow are transformed into differential equations by applying similarity transformations. Keller box method is used to bring out the numerical solution.

Findings

The discovery interprets that temperature as well as the velocity of Ag-engine oil nanofluids are more noticeable than Cu-engine oil nanofluids. Thermal boundary layer increases for radiation parameter as well as Biot number. Fluctuations of co-efficient of drag skin friction as well heat transfer rate at the wall are also tested.

Originality/value

Till now, no numerical studies are reported on the heat transfer enhancement of the permeable wedge under thermal radiation on engine oil nanofluid flow by considering convective heating.

Details

Multidiscipline Modeling in Materials and Structures, vol. 15 no. 1
Type: Research Article
ISSN: 1573-6105

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Article
Publication date: 13 July 2023

Prachi Vinod Ingle, Mahesh Gangadhar and M.D. Deepak

In recent times, there has been a lot of research focused on performance measurement (PM) in project-based sectors. However, there are very few studies that were reported on the…

359

Abstract

Purpose

In recent times, there has been a lot of research focused on performance measurement (PM) in project-based sectors. However, there are very few studies that were reported on the significance of PM in the construction sector. Keeping track of an organization in achieving organizations goals and objectives seems an important way. One of the major challenges faced by the industry is unavailable of an appropriate PM system for assessing organizational performance. Most of the PM approaches consider the traditional project triangle assessment of project success. Based on the limitations identified in existing PM models, the purpose of this paper is to develop a comprehensive PM model, i.e. Modified Project Quarter Back Rating (MPQR) applicable for construction projects.

Design/methodology/approach

A detailed list of performance areas as a method for PM is analyzed in the construction industry context. Also, industry-specific professionals conducted semi-structured interviews to assess whether these performance areas are sufficient to measure and understand the PM systems.

Findings

The research finding focuses on developing the MPQR model that considers both financial and non-financial areas for performance assessment to provide a holistic assessment of project performance.

Practical implications

MPQR model provides an opportunity to set the benchmark for overall performance for construction organizations.

Originality/value

The findings of the study are expected to provide guidelines to construction professionals for implementing the performance model that will improve performance in the construction industry.

Details

Benchmarking: An International Journal, vol. 31 no. 5
Type: Research Article
ISSN: 1463-5771

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Article
Publication date: 9 October 2023

Goutam Kumar Jana, Sumit Bera, Ribhu Maity, Tithi Maity, Arjun Mahato, Shibayan Roy, Hemakesh Mohapatra and Bidhan Chandra Samanta

The manufacture of polymer composites with a lower environmental footprint requires incorporation of sustainably sourced components. In addition, the incorporation of novel…

115

Abstract

Purpose

The manufacture of polymer composites with a lower environmental footprint requires incorporation of sustainably sourced components. In addition, the incorporation of novel components should not compromise the material properties. The purpose of this paper is to demonstrate the use of a synthetic amine functional toluidine acetaldehyde condensate (AFTAC) as a modifier for fiber-reinforced epoxy composites. One of the fiber components was sourced from agricultural byproducts, and glass fiber was used as the fiber component for comparison.

Design/methodology/approach

The AFTAC condensate was synthesized via an acid-catalyzed reaction between o-toluidine and acetaldehyde. To demonstrate its efficacy as a toughening agent for diglycidyl ether bisphenol A resin composites and for the comparison of reinforcing materials of interest, composites were fabricated using a natural fiber (mat stick) and a synthetic glass fiber as the reinforcing material. A matched metal die technique was used to fabricate the composites. Composites were prepared and their mechanical and thermal properties were evaluated.

Findings

The inclusion of AFTAC led to an improvement in the mechanical strengths of these composites without any significant deterioration of the thermal stability. It was also observed that the fracture strengths for mat stick fiber-reinforced composites were lower than that of glass fiber-reinforced composites.

Originality/value

To the best of the authors’ knowledge, the use of the AFTAC modifier as well as incorporation of mat stick fibers in epoxy composites has not been demonstrated previously.

Details

Pigment & Resin Technology, vol. 54 no. 1
Type: Research Article
ISSN: 0369-9420

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Article
Publication date: 22 May 2009

Bidhan Samanta, Tithi Maity and A.K. Banthia

The purpose of this paper is to evaluate the improvement of mechanical and thermal properties of cured epoxy modified with amine functional chloroaniline formaldehyde condensate…

469

Abstract

Purpose

The purpose of this paper is to evaluate the improvement of mechanical and thermal properties of cured epoxy modified with amine functional chloroaniline formaldehyde condensate (AFCFC) and to determine the optimum level of modification.

Design/methodology/approach

To evaluate toughening, different compositions were made by adding various concentration of AFCFC to epoxy. The impact, adhesive, tensile and flexural strengths of the modified and the unmodified epoxy were characterised by dynamic mechanical analysis. Thermogravimetric properties of modified epoxy were also reported.

Findings

The modification of epoxy resin using AFCFC showed significant enhancement of mechanical strength over unmodified epoxy. The reason behind this is that, in the initial stage of curing, the AFCFC are miscible with the epoxy and form a homogeneous solution. This homogeneity promotes the chemical reaction and network formation. During the curing process, as the molecular weight increases, the component separates within the reaction medium to form a second dispersed phase.

Research limitations/implications

The toughening agent AFCFC has been synthesised by using chloroaniline and formaldehyde. By changing amine and aldehyde, other toughening agents could be synthesised and the efficiency of modification of epoxy resin using these could also be studied.

Originality/value

AFCFC modified epoxy could be used in the field of coating, casting, adhesives, potting and encapsulation of semiconductor devices.

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Article
Publication date: 12 August 2021

Gangadhar Ch, Thirumal S., Ramesh R., Damaraju Sri Sai Satyanarayana, Asadi Srinivasulu and Kranthi Kumar K.

The present digital world’s challenging issue is COVID-19. This paper is related to the process of the COVID-19 treatment based on age, gender, symptoms and previous health…

317

Abstract

Purpose

The present digital world’s challenging issue is COVID-19. This paper is related to the process of the COVID-19 treatment based on age, gender, symptoms and previous health issues. This paper gives the deep discussion about the prevention, symptoms, tests and treatment process. In this research work, the discussion is about vaccine invention and the side effects of the consumed medication.

Design/methodology/approach

This paper gives a clear explanation of the types of vaccine, which are lopinavir, ritonavir, remdesivir, hydroxychloroquine, chloroquine and plasma therapy. Thereafter, the discussion is prolonged to Indian vaccine for COVID-19.

Findings

This paper examines some of the COVID-19 treatment processes and difficulties, and finally, this paper aims to summarize and give an overview of the present preclinical research and clinical trials of potential candidates for COVID-19 treatments and vaccines.

Originality/value

The required information has been taken from online databases such as PubMed, Science, Nature, PNAS and Cell. Papers included were published between December 2019 and July 2020. The current results indicate the most promising outcomes for dexamethasone as a treatment and vaccine. Further research is needed to identify safe and effective treatments and vaccines for COVID-19.

Details

World Journal of Engineering, vol. 19 no. 1
Type: Research Article
ISSN: 1708-5284

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Article
Publication date: 25 June 2021

Gangadhar Ch, Nama Ajay Nagendra, Syed Mutahar Aaqib, C.M. Sulaikha, Shaheena Kv and Karanam Santoshachandra Rao

COVID-19 would have a far-reaching impact on the international health-care industry and the patients. For COVID-19, there is a need for unique screening tests to reliably and…

55

Abstract

Purpose

COVID-19 would have a far-reaching impact on the international health-care industry and the patients. For COVID-19, there is a need for unique screening tests to reliably and rapidly determine who is infected. Medical COVID images protection is critical when data pertaining to computer images are being transmitted through public networks in health information systems.

Design/methodology/approach

Medical images such as computed tomography (CT) play key role in the diagnosis of COVID-19 patients. Neural networks-based methods are designed to detect COVID patients using chest CT scan images. And CT images are transmitted securely in health information systems.

Findings

The authors hereby examine neural networks-based COVID diagnosis methods using chest CT scan images and secure transmission of CT images for health information systems. For screening patients infected with COVID-19, a new approach using convolutional neural networks is proposed, and its output is simulated.

Originality/value

The required patient’s chest CT scan images have been taken from online databases such as GitHub. The experiments show that neural networks-based methods are effective in the diagnosis of COVID-19 patients using chest CT scan images.

Details

World Journal of Engineering, vol. 19 no. 2
Type: Research Article
ISSN: 1708-5284

Keywords

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