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Article
Publication date: 21 June 2019

Amit Srivastava, Dharmendra Kumar Srivastava and Anil Kumar Misra

The present study aims to demonstrate the performance assessment of flexible pavement structure in probabilistic framework with due consideration of spatial variability…

Abstract

Purpose

The present study aims to demonstrate the performance assessment of flexible pavement structure in probabilistic framework with due consideration of spatial variability modeling of input parameter.

Design/methodology/approach

The analysis incorporates mechanistic–empirical approach in which numerical analysis with spatial variability modeling of input parameters, Monte Carlo simulations (MCS) and First Order Reliability Method (FORM) are combined together for the reliability analysis of the flexible pavement. Random field concept along with Cholesky decomposition technique is used for the spatial variability modeling of the input parameter and implemented in commercially available finite difference code FLAC for the numerical analysis of pavement structure.

Findings

Results of the reliability analysis, with spatial variability modeling of input parameter, are compared with the corresponding results obtained without considering spatial variability of parameters. Analyzing a particular three-layered flexible pavement structure, it is demonstrated that spatial variability modeling of input parameter provides more realistic treatment to property variations in space and influences the response of the pavement structure, as well as its performance assessment.

Originality/value

Research is based on reliability analysis approach, which can also be used in decision-making for quality control and flexible pavement design in a given environment of uncertainty and extent of spatially varying input parameters in a space.

Details

Journal of Engineering, Design and Technology , vol. 17 no. 6
Type: Research Article
ISSN: 1726-0531

Keywords

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Article
Publication date: 3 October 2019

Dharmendra B.V., Shyam Prasad Kodali and Nageswara Rao Boggarapu

The purpose of this paper is to adopt the multi-objective optimization technique for identifying a set of optimum abrasive water jet machining (AWJM) parameters to achieve…

Abstract

Purpose

The purpose of this paper is to adopt the multi-objective optimization technique for identifying a set of optimum abrasive water jet machining (AWJM) parameters to achieve maximum material removal rate (MRR) and minimum surface roughness.

Design/methodology/approach

Data of a few experiments as per the Taguchi’s orthogonal array are considered for achieving maximum MRR and minimum surface roughness (Ra) of the Inconel718. Analysis of variance is performed to understand the statistical significance of AWJM input process parameters.

Findings

Empirical relations are developed for MRR and Ra in terms of the AWJM process parameters and demonstrated their adequacy through comparison of test results.

Research limitations/implications

The signal-to-noise ratio transformation should be applied to take in to account the scatter in the repetition of tests in each test run. But, many researchers have adopted this transformation on a single output response of each test run, which has no added advantage other than additional computational task. This paper explains the impact of insignificant process parameter in selection of optimal process parameters. This paper demands drawbacks and complexity in existing theories prior to use new algorithms.

Practical implications

Taguchi approach is quite simple and easy to handle optimization problems, which has no practical implications (if it handles properly). There is no necessity to hunt for new algorithms for obtaining solution for multi-objective optimization AWJM process.

Originality/value

This paper deals with a case study, which demonstrates the simplicity of the Taguchi approach in solving multi-objective optimization problems with a few number of experiments.

Details

Multidiscipline Modeling in Materials and Structures, vol. 16 no. 2
Type: Research Article
ISSN: 1573-6105

Keywords

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Article
Publication date: 30 July 2021

Vishesh Anna Joshi and Ila Gupta

The COVID-19 pandemic has had serious and far-reaching consequences on every aspect of human life. As various countries went into lockdown, hospitality and tourism was…

Abstract

Purpose

The COVID-19 pandemic has had serious and far-reaching consequences on every aspect of human life. As various countries went into lockdown, hospitality and tourism was badly affected and this has had an impact on hospitality and tourism education too. This paper aims to assess the impact of the pandemic on hospitality and tourism education in India and the effectiveness of mitigation strategies in support of the industry. The study also proposes recommendations for resilience-building.

Design/methodology/approach

A pilot survey using semi-structured interviews was conducted and followed by a detailed questionnaire-based survey of industry representatives and educators. Selected industry leaders were also interviewed to understand the industry perspective on the pandemic, the “new normal” and the expectations of post pandemic graduates. The study focuses on four main areas – (1) existing interrelationships between industry and academia, (2) the efficiency of Internet-based education during the pandemic, (3) the “new normal” and the expectations of graduates and (4) recommendations for resilience-building.

Findings

There is a perceived gap between academia and industry that needs to be bridged. We found that the pandemic is seriously affecting education with challenges ranging from technological issues, disparities and reduced enrolments to student behavioural issues. Most impacted was the practical training component in operational areas and especially in food production and services. It is now clear that education needs a shift in focus from the more traditional, operational aspects of hospitality and tourism to technological awareness, knowledge and soft skills development. The research also identified a need for better two-way communication and information exchange between industry and academia. In fact, the lessons learnt from the pandemic need to be communicated from industry to academia. This is important given that industry expects graduates to be adaptive, compassionate, able to multi-task, familiar with the principles of crisis management and proficient with technology.

Originality/value

The study analyses possible long-term effects and implications for the workforce of the future as the industry struggles to respond to the pandemic. The study also suggests possible avenues and methods for industry and academia to form more symbiotic relationships and become more resilient.

Details

Worldwide Hospitality and Tourism Themes, vol. 13 no. 5
Type: Research Article
ISSN: 1755-4217

Keywords

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