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Article
Publication date: 29 April 2021

Uma Natarajan, Kenneth Y.T. Lim and Kumar Laxman

The purpose of this study is to examine the reform initiatives that began with a focus towards change in the teaching and learning in Singapore classrooms with technology…

Abstract

Purpose

The purpose of this study is to examine the reform initiatives that began with a focus towards change in the teaching and learning in Singapore classrooms with technology integration.

Design/methodology/approach

The methodology used in this study is review and descriptive narrative of educational technology polices, initiatives and projects.

Findings

The Ministry of Education, Singapore, has ensured that schools had infrastructure, leadership and necessary teacher training to successfully implement the initiatives.

Originality/value

The descriptions of the implementations are valuable lessons for other national systems in the region and beyond, seeking to integrate information and communications technology (ICT) in their education systems.

Details

International Journal of Educational Management, vol. 35 no. 5
Type: Research Article
ISSN: 0951-354X

Keywords

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Article
Publication date: 4 January 2013

Kumar Laxman

The purpose of this paper is to investigate the pedagogical implications of implementing inquiry‐based learning within the context of a problem‐solving oriented curriculum…

Abstract

Purpose

The purpose of this paper is to investigate the pedagogical implications of implementing inquiry‐based learning within the context of a problem‐solving oriented curriculum in a polytechnic institution in Singapore. An interventionist study examines the impact of developing questioning skills on students’ problem‐solving abilities.

Design/methodology/approach

A case study approach was adopted as the key research methodology for this course. The students who participated in this study came from a class of 25 first‐year students and they were assigned to five groups consisting of five members in each group. These students ranged in ages from 17 to 19 and were an even mix in terms of gender distribution.

Findings

It was found in the study that inquiry‐based learning as an educational process of active learning encouraged students to discover new knowledge on their own and enhanced their problem‐solving abilities. By generating their own questions and evidence‐supported explanations, students were also able to engage in higher levels of cognitive reasoning in the classroom.

Originality/value

The findings of this study will inform curriculum designers and educators who wish to implement alternative pedagogies on how they can develop inquiry‐based lessons for their classes.

Details

International Journal for Lesson and Learning Studies, vol. 2 no. 1
Type: Research Article
ISSN: 2046-8253

Keywords

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Book part
Publication date: 21 July 2011

Jon S.T. Quah

During a press conference at the Imperial Hotel in Delhi on 13 March 2001, the Internet news site, Tehelka.com, showed secret video footage of senior politicians…

Abstract

During a press conference at the Imperial Hotel in Delhi on 13 March 2001, the Internet news site, Tehelka.com, showed secret video footage of senior politicians, bureaucrats, and army officers accepting money in a fake defense deal. Two journalists from Tehelka, Anirudha Bahal and Mathew Samuel, posed as arms dealers from a fictitious arms company called West End International to sell nonexistent handheld thermal cameras to senior officials of the Ministry of Defense (MOD) in India. Bahal and Samuel paid bribes to politicians, civil servants, and army officers to procure government contracts. The journalists used three hidden cameras to videotape the corrupt politicians and officials accepting the bribes, with the most dramatic video clip showing the Bharatiya Janata Party (BJP) President, Bangaru Laxman, accepting a wad of currency notes from them. Laxman later claimed that he was not guilty of wrongdoing for accepting Rs. 100,000 (US$2,170) as a donation for the BJP. Describing the episode as “concocted,” he added that he had given the donation to the BJP's treasurer (BBC News, 2001a).

Details

Curbing Corruption in Asian Countries: An Impossible Dream?
Type: Book
ISBN: 978-0-85724-819-0

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Article
Publication date: 10 February 2021

Vaibhav Sidraya Ganachari, Uday Chate, Laxman Waghmode, Prashant Jadhav and Satish Mullya

Many engineering applications in this era require new age materials; however, some classic alloys like spring steel are still used in critical applications such as…

Abstract

Purpose

Many engineering applications in this era require new age materials; however, some classic alloys like spring steel are still used in critical applications such as aerospace, defense and automobile. To machine spring steel material, there exist various difficulties such as rapid tool wear rate, the rough surface formation of a workpiece and higher power consumption. The purpose of this paper is to address these issues, various approaches in addition to electrical discharge machines (EDM) are used such as dry EDM (DEDM) and near dry EDM (NDEDM).

Design/methodology/approach

This study focuses on these two approaches and their comparative analysis with respect to tool wear during machining of spring steel material. For this study, current, gap voltage, cycle time and dielectric medium pressure are considered input variables. This study shows that the near dry EDM approach yields better results. Hence, the thermo-electrical model for this approach is developed using ANSYS workbench, which is further validated by comparing with experimental results. This thermo-electrical model covers spark radius variation and formation of temperature profile due to electric discharge. Transient thermal analysis is used to simulate the electric discharge machining.

Findings

It is observed from this study that discharge environment parameters such as debris concentration and fluid viscosity largely influences the dielectric fluid pressure value. Experimental results revealed that NDEDM yields better results in comparison with DEDM as it shows a 25% lesser tool wear rate in NDEDM.

Originality/value

The range of predicted results and the experimental results are in close agreement, authenticating the model.

Details

World Journal of Engineering, vol. 18 no. 5
Type: Research Article
ISSN: 1708-5284

Keywords

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Article
Publication date: 31 December 2018

Rajyalakshmi K. and Nageswara Rao Boggarapu

Scatter in the outcome of repeated experiments is unavoidable due to measurement errors in addition to the non-linear nature of the output responses with unknown…

Abstract

Purpose

Scatter in the outcome of repeated experiments is unavoidable due to measurement errors in addition to the non-linear nature of the output responses with unknown influential input parameters. It is a standard practice to select an orthogonal array in the Taguchi approach for tracing optimum input parameters by conducting a few number of experiments and confirm them through additional experimentation (if necessary). The purpose of this paper is to present a simple methodology and its validation with existing test results in finding the expected range of the output response by suggesting modifications in the Taguchi method.

Design/methodology/approach

The modified Taguchi approach is proposed to find the optimum process parameters and the expected range of the output response.

Findings

This paper presents a simple methodology and its validation with existing test results in finding the expected range of the output response by suggesting modifications in the Taguchi method.

Research limitations/implications

Adequacy of this methodology should be examined by considering the test data on different materials and structures.

Originality/value

The introduction of Chauvenet’s criterion and opposing the signal-to-noise ratio transformation on repeated experiments of each test run will provide fruitful results and less computation burden.

Details

Multidiscipline Modeling in Materials and Structures, vol. 15 no. 2
Type: Research Article
ISSN: 1573-6105

Keywords

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Article
Publication date: 2 October 2017

Rajkumar Bhimgonda Patil, Basavraj S. Kothavale, Laxman Yadu Waghmode and Shridhar G. Joshi

The paper presents reliability, maintainability and life cycle cost (LCC) analysis of a computerized numerical control (CNC) turning center which is manufactured and used…

Abstract

Purpose

The paper presents reliability, maintainability and life cycle cost (LCC) analysis of a computerized numerical control (CNC) turning center which is manufactured and used in India. The purpose of this paper is to identify the critical components/subsystems from reliability and LCC perspective. The paper further aims at improving reliability and LCC by implementing reliability-improvement methods.

Design/methodology/approach

This paper uses a methodology for the reliability analysis based on the assessment of trends in maintenance data. The data required for reliability and LCC analysis are collected from the manufacturers and users of CNC turning center over a period of eight years. ReliaSoft’s Weibull++9 software has been used for verifying goodness of fit and estimating parameters of the distribution. The LCC of the system is estimated for five cost elements: acquisition cost, operation cost, failure cost, support cost and net salvage value.

Findings

The analysis shows that the spindle bearing, spindle belt, spindle drawbar, insert, tool holder, drive battery, hydraulic hose, lubricant hose, coolant hose and solenoid valve are the components with low reliability. With certain design changes and implementation of reliability-based maintenance policies, system reliability is improved, especially during warranty period. The reliability of the CNC turning center is improved by nearly 45 percent at the end of warranty period and system mean time between failure is increased from 15,000 to 17,000 hours. The LCC analysis reveals that the maintenance cost, operating cost and support costs dominate the LCC and contribute to the tune of 87 percent of the total LCC.

Research limitations/implications

The proposed methodology provides an excellent tool that can be utilized in industries, where safety, reliability, maintainability and availability of the system play a vital role. The approach may be improved by collecting data from more number of users of the CNC turning centers.

Practical implications

The approach presented in this paper is generic and can be applied to analyze the repairable systems. A real case study is presented to show the applicability of the approach.

Originality/value

The proposed methodology provides a practical approach for the analysis of time-to-failure and time-to-repair data based on the assessment of trends in the maintenance data. The methodology helps in selecting a proper approach of the analysis such as Bayesian method, parametric methods and nonparametric methods.

Details

International Journal of Quality & Reliability Management, vol. 34 no. 9
Type: Research Article
ISSN: 0265-671X

Keywords

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Article
Publication date: 7 March 2016

Laxman Yadu Waghmode and Rajkumar Bhimgonda Patil

Reliability analysis is required to identify the components or subsystems with low reliability for a given designed performance. Life cycle cost analysis helps understand…

Abstract

Purpose

Reliability analysis is required to identify the components or subsystems with low reliability for a given designed performance. Life cycle cost analysis helps understand the cost implications over the entire life span of a product. The purpose of this paper is to present a case study describing reliability analysis and life cycle cost optimization of a band saw cutting machine manufactured and used in India.

Design/methodology/approach

The data required for reliability analysis is collected from the manufacturer and users of band saw cutting machine. The parameters of failure distribution have been estimated by using ReliaSoft’s Weibull++6 software. The life cycle cost is divided into various cost elements such as acquisition cost, operation cost, failure cost, support cost and net salvage value.

Findings

The results of the analysis show that the components such as band wheel bearing, guide roller bearing, limit switch, carbide pad, hydraulic cylinder oil seal, control panel dial, control panel and solenoid valve are critical from reliability and life cycle cost analysis perspective.

Originality/value

With certain design changes it is found that the reliability of the system is increased by 15.85 percent while the life cycle cost is reduced by 22.09 percent. The study also shows that the reliability analysis is useful for deciding maintenance intervals.

Details

International Journal of Quality & Reliability Management, vol. 33 no. 3
Type: Research Article
ISSN: 0265-671X

Keywords

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Article
Publication date: 5 February 2018

Shankar Chakraborty, Partha Protim Das and Vidyapati Kumar

The purpose of this paper is to exploit the fullest potential and capability of different non-traditional machining (NTM) processes, it is often recommended to operate…

Abstract

Purpose

The purpose of this paper is to exploit the fullest potential and capability of different non-traditional machining (NTM) processes, it is often recommended to operate them at their optimal parametric combinations. There are several mathematical tools and techniques that have been effectively deployed for identifying the optimal parametric mixes for the NTM processes. Amongst them, grey relational analysis (GRA) has become quite popular due to its sound mathematical basis, ease to implement and apprehensiveness for multi-objective optimization of NTM processes.

Design/methodology/approach

In this paper, GRA is integrated with fuzzy logic to present an efficient technique for multi-objective optimization of three NTM processes (i.e. abrasive water-jet machining, electrochemical machining and ultrasonic machining) while identifying their best parametric settings for enhanced machining performance.

Findings

The derived results are validated with respect to technique for order preference by similarity to ideal solution (TOPSIS), and analysis of variance is also performed so as to identify the most significant control parameters in the considered NTM processes.

Practical implications

This grey-fuzzy logic approach provides better parametric combinations for all the three NTM processes with respect to the predicted grey-fuzzy relational grades (GFRG). The developed surface plots help the process engineers to investigate the effects of various NTM process parameters on the predicted GFRG values.

Originality/value

The adopted approach can be applied to various machining (both conventional and non-conventional) processes for their parametric optimization for achieving better response values.

Details

Grey Systems: Theory and Application, vol. 8 no. 1
Type: Research Article
ISSN: 2043-9377

Keywords

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Article
Publication date: 11 May 2012

Shri Ram and N. Laxman Rao

Bioinformatics is an emerging discipline where the interdisciplinary research holds great promise for the advancement of research and development in many complex areas…

Abstract

Purpose

Bioinformatics is an emerging discipline where the interdisciplinary research holds great promise for the advancement of research and development in many complex areas. The research output generates a huge amount of data and information. Because of the heterogeneous nature of bioinformatics resources, difficulty in accessing pertinent information is the biggest challenge for the bioinformatics community. The integration of bioinformatics resources in a comprehensive manner is advocated by the bioinformatics user community as well as by information scientists serving this community. There are have already been some efforts made for integration of bioinformatics resources by the discrete bioinformatics community, but these are based on the requirement of their own area and arena. This paper aims to discuss the design and development of a tool for the integration of various heterogeneous bioinformatics information resources available over the internet.

Design/methodology/approach

The authors have developed a tool with the acronym “iBIRA” (Integrated Bioinformatics Information Resource Access) that associates the bioinformatics community with the bioinformatics “resourceome” (the term suggested for the “full set of bioinformatics resources” by Cannata et al.). Available over the internet. iBIRA (www.ibiranet.in) integrates bioinformatics resources in a way such that it is possible to locate, connect and communicate different categories of resources in a cohesive manner. A software engineering and database‐driven approach was used for the integration and organization of bioinformatics resources. Computational programming such as Hypertext Preprocessor (PHP), a server‐side dynamic web programming language, and MySQL as a database management system have been used. Dublin Core Metadata Standards have been used for the design of metadata for bioinformatics resources..

Findings

The term “resource” in the area of bioinformatics covers various entities such as journals, molecular biology databases, online annotation tools, patents, published documents (articles, books, etc), protocols, software tools, and web servers. It has been found that bioinformatics resources are heterogeneous in nature and available over the internet in different forms and formats. The fact that bioinformatics resources are scattered over the internet makes resource discovery difficult for the bioinformatics community, and there is need for a system that reorganizes these resources. The integration of all the resources of bioinformatics at a single platform (called “iBIRA”) provides significant “value added” to the bioinformatics community, those serving this population.

Originality/value

The iBIRA tool is a meta‐server developed to provide information service about the availability of various bioinformatics resources to the bioinformatics community. This will provide a value‐added benefit to the population in helping them to locate relevant resources for their education, research and training.

Details

Reference Services Review, vol. 40 no. 2
Type: Research Article
ISSN: 0090-7324

Keywords

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Article
Publication date: 23 July 2021

Khalid Abed Dahleez, Ayman A. El-Saleh, Abrar Mohammed Al Alawi and Fadi Abdelmuniem Abdelfattah

This research examined the factors affecting several types of student engagement, namely agentic, behavioral, emotional and cognitive engagement. Specifically, it examined…

Abstract

Purpose

This research examined the factors affecting several types of student engagement, namely agentic, behavioral, emotional and cognitive engagement. Specifically, it examined the effect of e-learning system usability on student engagement and explored teacher behavior's possible intervening impact on this relationship.

Design/methodology/approach

Data were collected from 418 students studying at different specializations at Omani private academic institutions. This study employed a quantitative methodology and utilized the Smart-PLS for data analyses.

Findings

The findings showed that e-learning system usability influenced significantly and positively agentic, behavioral and cognitive engagement. However, the link between e-learning system usability and emotional engagement was not significant. Moreover, teacher behavior mediated the relationship between e-learning system usability and the four types of engagement.

Originality/value

This study improves one’s understanding of how the interaction of e-learning system usability and teacher behavior affects several aspects of student engagement. It also helps higher education administrators and policymakers by exploring the influential effects of e-learning systems usability and teacher behavior on facilitating students' engagement.

Details

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

Keywords

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