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Article
Publication date: 1 December 1998

I.V. Suresh, C. Padmakar, Prabha Padmakaran, M.V.R.L. Murthy, C.B. Raju, R.N. Yadava and K. Venkata Rao

The potential problems and their consequences due to fly ash disposal have been well studied around the world. Ash pond is a common available disposal facility for thermal power…

2173

Abstract

The potential problems and their consequences due to fly ash disposal have been well studied around the world. Ash pond is a common available disposal facility for thermal power plants. The pond ash is subjected to weathering and the ions present in ash migrate to the soil and subsequently to the ground water over a period of time. A study has been carried out at Vijayawada Thermal Power Station (VTPS), Andhra Pradesh, India, to monitor the ground water quality in order to determine the potential impact of ash ponds. It has been found that ground water quality is deteriorated due to the presence of fly ash ions (macro and micro such as Fe, Ca, Mg etc.) which were leached out from the ash up to some extent. The contamination is likely to increase in the case of toxic and other ions with the passage of time. The presence of vegetative cover and plant growth on the down stream slope and fly ash ponds which are covered by soil may effectively control the leaching of ions.

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Environmental Management and Health, vol. 9 no. 5
Type: Research Article
ISSN: 0956-6163

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Article
Publication date: 6 July 2022

Baocheng Liu, Jinliang Liu, Yanqian Wen, Qinglin Hu, Liang Liu and Shili Zhao

In this paper, to obtain shear and bending performance of carbon fiber-reinforced polymer (CFRP)-strengthened beams bonded by geopolymers, the effects of impregnated adhesive…

106

Abstract

Purpose

In this paper, to obtain shear and bending performance of carbon fiber-reinforced polymer (CFRP)-strengthened beams bonded by geopolymers, the effects of impregnated adhesive types, strengthened scheme, CFRP layer and pre-cracked width are investigated, and the performance of CFRP-strengthened beams is validated by the establishment of Finite Element Models (FEMs).

Design/methodology/approach

In this paper, static loading test and finite element analysis of epoxy-CFRP-strengthened (ECS) and geopolymer-CFRP-strengthened (GCS) were carried out, and the bearing capacity and stiffness were compared, the results show that GCS reinforced concrete (RC) beam is feasible and effective.

Findings

The bearing capacity, crack distribution and development, load–deflection curves of GCS RC beams with different pre-crack widths were investigated. The reinforcement effect of geopolymer achieves the same as epoxy, effectively improving the ultimate bearing capacity of the beam, with a maximum increase rate of 28.9%. The failure mode of CFRP is broken in the yield failure stage of GCS RC beam with reasonable strengthening form, and the utilization rate of CFRP is improved. CFRP-strengthened layers, pre-cracked widths significantly affect the mechanical properties, and deformation properties of the strengthened beams.

Originality/value

Compared with ECS RC beams, the bearing capacity and stiffness of GCS RC beams are similar to or even better, indicating that GCS RC beam is feasible and effective. It is a new method for CFRP-strengthened beams, which not only conforms to the concept of national ecological civilization construction, but also provides an economical, environmentally friendly and excellent performance solution for structural reinforcement.

Details

International Journal of Structural Integrity, vol. 13 no. 5
Type: Research Article
ISSN: 1757-9864

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Article
Publication date: 14 December 2023

Prathamesh Gaikwad and Sandeep Sathe

The purpose of this paper is to study and analyze the effects of fly ash (FA) as a mineral admixture on compressive strength (CS), carbonation resistance and corrosion resistance…

227

Abstract

Purpose

The purpose of this paper is to study and analyze the effects of fly ash (FA) as a mineral admixture on compressive strength (CS), carbonation resistance and corrosion resistance of reinforced concrete (RC). In addition, the utilization of inexpensive and abundantly available FA as a cement replacement in concrete has several benefits including reduced OPC usage and elimination of the FA disposal problem.

Design/methodology/approach

Reinforcement corrosion and carbonation significantly affect the strength and durability of the RC structures. Also, the utilization of FA as green corrosion inhibitors, which are nontoxic and environmentally friendly alternatives. This review discusses the effects of FA on the mechanical characteristics of concrete. Also, this review analyzes the impact of FA as a partial replacement of cement in concrete and its effect on the depth of carbonation in concrete elements and the corrosion rate of embedded steel as well as the chemical composition and microstructure (X-ray diffraction analysis and scanning electron microscopy) of FA concrete were also reviewed.

Findings

This review provides a clear analysis of the available study, providing a thorough overview of the current state of knowledge on this topic. Regarding concrete CS, the findings indicate that the incorporation of FA often leads to a loss in early-age strength. However, as the curing period increased, the strength of fly ash concrete (FAC) increased with or even surpassed that of conventional concrete. Analysis of the accelerated carbonation test revealed that incorporating FA into the concrete mix led to a shallower carbonation depth and slower diffusion of carbon dioxide (CO2) into the concrete. Furthermore, the half-cell potential test shows that the inclusion of FA increases the durability of RC by slowing the rate of steel-reinforcement corrosion.

Originality/value

This systematic review analyzes a wide range of existing studies on the topic, providing a comprehensive overview of the research conducted so far. This review intends to critically assess the enhancements in mechanical and durability attributes (such as CS, carbonation and corrosion resistance) of FAC and FA-RC. This systematic review has practical implications for the construction and engineering industries. This can support engineers and designers in making informed decisions regarding the use of FA in concrete mixtures, considering both its benefits and potential drawbacks.

Details

World Journal of Engineering, vol. 22 no. 1
Type: Research Article
ISSN: 1708-5284

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Article
Publication date: 9 December 2020

Aditya Singh, Padmakar Pandey and G.C. Nandi

For efficient trajectory control of industrial robots, a cumbersome computation for inverse kinematics and inverse dynamics is needed, which is usually developed using spatial…

305

Abstract

Purpose

For efficient trajectory control of industrial robots, a cumbersome computation for inverse kinematics and inverse dynamics is needed, which is usually developed using spatial transformation using Denavit–Hartenberg principle and Lagrangian or Newton–Euler methods, respectively. The model is highly non-linear and needs to deal with uncertainties because of lack of accurate measurement of mechanical parameters, noise and non-inclusion of joint friction, which results in some inaccuracies in predicting accurate torque trajectories. To get a guaranteed closed form solution, the robot designers normally follow Pieper’s recommendation and compromise with the mechanical design. While this may be acceptable for the industrial robots where the aesthetic look is not that important, it is not for humanoid and social robots. To help solve this problem, this study aims to propose an alternative machine learning-based computational approach based on a multi-gated sequence model for finding appropriate mapping between Cartesian space to joint space and motion space to joint torque space.

Design/methodology/approach

First, the authors generate sufficient data required for the sequence model, using forward kinematics and forward dynamics by running N number of nested loops, where N is the number of joints of the robot. Subsequently, to develop a learning-based model based on sequence analysis, the authors propose to use long short-term memory (LSTM) and hence, train an LSTM model, the architecture details of which have been discussed in the paper. To make LSTM learning algorithms perform efficiently, the authors need to detect and eliminate redundant features from the data set, which the authors propose to do using an elegant statistical tool called Pearson coefficient.

Findings

To validate the proposed model, the authors have performed rigorous experiments using both hardware and simulation robots (Baxter/Anukul robot) available in their laboratory and KUKA simulation robot data set made available from Neural Learning for Robotics Laboratory. Through several characteristic plots, it has been shown that a sequence-based LSTM model of deep learning architecture with non-redundant features could help the robots to learn smooth and accurate trajectories more quickly compared to data sets having redundancy. Such data-driven modeling techniques can change the future course of direction of robotics research for solving the classical problems such as trajectory planning and motion planning for manipulating industrial as well as social humanoid robots.

Originality/value

The present investigation involves development of deep learning-based computation model, statistical analyses to eliminate redundant features, data creation from one hardware robot (Anukul) and one simulation robot model (KUKA), rigorously training and testing separately two computational models (specially configured two LSTM models) – one for learning inverse kinematics and one for learning inverse dynamics problem – and comparison of the inverse dynamics model with the state-of-the-art model. Hence, the authors strongly believe that the present paper is compact and complete to get published in a reputed journal so that dissemination of new ideas can benefit the researchers in the area of robotics.

Details

Industrial Robot: the international journal of robotics research and application, vol. 48 no. 1
Type: Research Article
ISSN: 0143-991X

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Article
Publication date: 15 April 2024

Geetika Madaan, Amrinder Singh, Amit Mittal and Padmakar Shahare

The circular economy (CE) promotes the recovery of value from waste while also working towards achieving long-term environmentally sustainable goals. The goal of this research is…

321

Abstract

Purpose

The circular economy (CE) promotes the recovery of value from waste while also working towards achieving long-term environmentally sustainable goals. The goal of this research is to explore the challenges, opportunities, future scope and green practices that small and medium-sized firms (SMEs) face as they move from the linear economy to the CE.

Design/methodology/approach

Based on a structured questionnaire, a survey was conducted with representatives from 163 SMEs in India. The data were analysed using co-variance based structural equation modelling technique.

Findings

This research identifies various challenges, including consumer acceptability, worries about awareness, recyclability issues, financial constraints and the absence of a defined management plan for SMEs in adopting the CE. Further, strong management will, innovation, technical up-gradation, training of employees, employee motivation and appropriate guidelines are recognized as essential possibilities for CE implementation.

Originality/value

While there has been some work on CE, no studies have directly compared these efforts with the goal of shifting from a linear economy to a CE. Given the transient nature of many archives, it is critical that the efforts put into them and the opinions of those who work in them be recorded so that communities can benefit from a shared linear economy in making decisions about their own history.

Details

Journal of Small Business and Enterprise Development, vol. 31 no. 6
Type: Research Article
ISSN: 1462-6004

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Article
Publication date: 19 August 2019

Shailesh Rastogi, Arpita Sharma and Chetan Padmakar Panse

The purpose of this paper is to explore the determinants of effective teaching–learning (ETL) from students’ perspective in B-schools and build a model for the satisfaction of…

372

Abstract

Purpose

The purpose of this paper is to explore the determinants of effective teaching–learning (ETL) from students’ perspective in B-schools and build a model for the satisfaction of students of B-schools from teaching–learning processes.

Design/methodology/approach

The study employs the descriptive research design, and the cross-sectional data are collected through a structured questionnaire. Out of 320, 302 accurately filled questionnaires were used for the empirical analysis. The data are collected from the masters of business management (MBA) students. An exploratory factor analysis is applied to appraise factors appropriate for ETL. A confirmatory factor analysis is used to establish reliability and validity of the identified factors. Structural equation modeling (SEM) is applied to empirically test the proposed model for ETL.

Findings

The major findings of the current study are as follows: this paper identifies extracurricular activities (ECA), conducive environment (CE) and project work and practical exposure (PWPE) as the determinants of ETL in MBA Programs. These determinants have been identified individually; however, collectively authors do not find any other study that discusses them. This paper explores a suitable and apt model of ETL through the identified determinants of ETL (ECA, CE and PWPE). This is also a contribution of the paper, which has not been observed by the authors, in the literature.

Research limitations/implications

The scope of the research can be enhanced to the all level of management students and colleges of all sorts can be taken.

Practical implications

Findings of this paper are a long-term plan with a futuristic vision. Determinants affecting ETL will help the administrators and faculty members at the MBA programs to realign their focus for the future.

Originality/value

This study determines three determinants (from the students’ points of view) for the effectiveness of the teaching–learning process in the management (MBA) programs. The determinants in this study are ECA, CE and PWPE. SEM is applied to test the model of ETL and to specify these three determinants (constructs). Decision makers for MBA programs can prudently use the model to bring about transformation in teaching–learning processes in business schools.

Details

International Journal of Educational Management, vol. 33 no. 6
Type: Research Article
ISSN: 0951-354X

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Publication date: 3 December 2018

Mahima Kaura Mathur, Ritu Mehta, Sanjeev Swami and Sanjeev Bhatnagar

The ‘Bottom of the Pyramid’ or BoP represents the population living at the lowest level of the economic or income pyramid across the world (Prahalad, 2002). The BoP approach…

Abstract

The ‘Bottom of the Pyramid’ or BoP represents the population living at the lowest level of the economic or income pyramid across the world (Prahalad, 2002). The BoP approach undoubtedly provides a market-based solution for poverty reduction and facilitates inclusive economic growth. This segment can be classified into two parts, namely, rural BoP and urban BoP. The urban BoP is a more sustainable and viable option for companies to operate in, since it strategically avoids the numerous challenges faced by the rural BoP. Rural BoP is relatively more distant, dispersed, desperately poor, largely illiterate and heterogeneous market (Ireland, 2008). This chapter aims at understanding and characterising the urban BoP market. Further it shares some interesting results of an empirical study conducted to understand the urban BoP consumers of Mumbai city. The study assumes importance as it focusses on the urban BoP as a realistic option to operate in the BoP by removing the dynamic barriers of the rural BoP. Additionally, it provides insight into the urban BoP market and its consumer behaviour.

Details

Bottom of the Pyramid Marketing: Making, Shaping and Developing BoP Markets
Type: Book
ISBN: 978-1-78714-556-6

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Article
Publication date: 1 January 2005

Sugata Mitra

Earlier work often referred to as the ‘hole in the wall’ experiments has shown that groups of children can leam to use public computers on their own. This paper presents the…

1420

Abstract

Earlier work often referred to as the ‘hole in the wall’ experiments has shown that groups of children can leam to use public computers on their own. This paper presents the method and results of an experiment conducted to investigate whether such unsupervised group learning in shared public spaces is universal. The experiment was conducted with ‘hole in the wall’ (minimally invasive education, or MIE) kiosks in 23 locations in rural India. Focus groups in each location were tested for computer literacy for 9 months. Results, which are discussed in the paper, show that groups of children can leam to use computers and the Internet on their own, irrespective of who or where they are. The paper also discusses the engineering considerations for building such ‘hole in the wall’ computers in public spaces.

Details

International Journal of Development Issues, vol. 4 no. 1
Type: Research Article
ISSN: 1446-8956

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Article
Publication date: 1 March 2021

Ubaid Illahi and Mohammad Shafi Mir

The purpose of this paper is to quantify and evaluate transport sustainability from an integrated perspective. It is argued that transportation systems being interdisciplinary and…

247

Abstract

Purpose

The purpose of this paper is to quantify and evaluate transport sustainability from an integrated perspective. It is argued that transportation systems being interdisciplinary and complex, the integrated approach towards quantification and evaluation would present its sustainability goals’ attainment in a much better way.

Design/methodology/approach

The proposed integrated methodology is divided into five major steps that are sub-divided. It adopts a three-tier classification system i.e. pillar, sub-division and indicator. In total, 116 sustainable transportation indicators (STIs) were classified into 10 subdivisions corresponding to three sustainability pillars. The weighting and aggregation of STIs were done using a combination of a statistical tool called principal component analysis/factor analysis, a machine learning tool called fuzzy logic and equal weighting method. The final output that the proposed integrated methodology generates is a new composite index called the integrated sustainable transportation index (IIST).

Findings

To check the credibility of the proposed integrated methodology, it was applied to 26 states and the National Capital Territory (NCT) of Delhi, India. Based on the computed IIST, 27 study zones were ranked and mapped. The results showed that while Tamil Nadu (0.643), Telangana (0.574) and Maharashtra (0.564) were the best-performing states, Goa (0.347), Chhattisgarh (0.436) and Meghalaya (0.439) were the worst-performing states, as far as the relative transportation sustainability is concerned.

Practical implications

The proposed integrated methodology could be useful for transportation evaluators, planners and policymakers who can recognize, track and improve the strengths and overcome the weaknesses within a transportation system.

Originality/value

The novelty of this research work is that it uses a multi-stage multi-tool approach to quantify and evaluate transport sustainability that minimizes the demerits of single-stage individual tools while maximizing their merits.

Details

Journal of Science and Technology Policy Management, vol. 13 no. 1
Type: Research Article
ISSN: 2053-4620

Keywords

Available. Open Access. Open Access
Article
Publication date: 10 March 2021

Prachi Bhavesh Sanghvi and Seema Mehrotra

The purpose of this review was to examine Indian research on help-seeking for mental health problems in adults.

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Abstract

Purpose

The purpose of this review was to examine Indian research on help-seeking for mental health problems in adults.

Design/methodology/approach

Original Indian research studies on help-seeking for mental health, published from the year 2001−2019 were searched on PubMed, EBSCO, ProQuest and OVID using a set of relevant keywords. After applying exclusion criteria, 52 relevant research studies were identified.

Findings

The reviewed studies spanned a variety of themes such as barriers and facilitators to help-seeking, sources of help-seeking, causal attributions as well as other correlates of help-seeking, process of help-seeking and interventions to increase help-seeking. The majority of these studies were carried out in general community samples or treatment-seeking samples. Very few studies incorporated non-treatment seeking distressed samples. There is a severe dearth of studies on interventions to improve help-seeking. Studies indicate multiple barriers to seeking professional help and highlight that mere knowledge about illness and availability of professional services may be insufficient to minimize delays in professional help-seeking.

Originality/value

Help-seeking in the Indian context is often a family-based decision-making process. Multi-pronged help-seeking interventions that include components aimed at reducing barriers experienced by non-treatment seeking distressed persons and empowering informal support providers with knowledge and skills for encouraging professional help-seeking in their significant others may be useful.

Details

Journal of Health Research, vol. 36 no. 3
Type: Research Article
ISSN: 0857-4421

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