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Article
Publication date: 9 February 2023

Vipin Gupta, Rajesh Kumar, Rajneesh Kumar and M.S. Barak

This paper aims to study the energy ratios of plane waves on an interface of nonlocal thermoelastic halfspace (NTS) and nonlocal orthotropic piezothermoelastic half-space (NOPS).

Abstract

Purpose

This paper aims to study the energy ratios of plane waves on an interface of nonlocal thermoelastic halfspace (NTS) and nonlocal orthotropic piezothermoelastic half-space (NOPS).

Design/methodology/approach

The memory-dependent derivatives (MDDs) approach with a hyperbolic two-temperature (HTT), three-phase lag theory is used here to study how the energy ratios change at the interface with the angle of incidence.

Findings

Plane waves that travel through NTS and hit the interface as a longitudinal wave, a thermal wave, or a transversal wave send four waves into the NOPS medium and three waves back into the NTS medium. The amplitude ratios of the different waves that are reflected and transmitted are used to calculate the energy ratios of the waves. It is observed that these ratios are affected by the HTT, nonlocal and MDD parameters.

Research limitations/implications

The energy ratios correspond to four distinct models; nonlocal HTT with memory, nonlocal HTT without memory, local HTT with memory and nonlocal classical-two-temperature with memory concerning the angle of incidence from 0 degree to 90 degree.

Practical implications

This model applies to several fields, including earthquake engineering, soil dynamics, high-energy particle physics, nuclear fusion, aeronautics and other fields where nonlocality, MDD and conductive temperature play an important role.

Originality/value

The authors produced the submitted document entirely on their initiative, with equal contributions from all of them.

Details

International Journal of Numerical Methods for Heat & Fluid Flow, vol. 33 no. 6
Type: Research Article
ISSN: 0961-5539

Keywords

Article
Publication date: 11 March 2024

Vipin Gupta, Barak M.S. and Soumik Das

This paper addresses a significant research gap in the study of Rayleigh surface wave propagation within a piezoelectric medium characterized by piezoelectric properties, thermal…

Abstract

Purpose

This paper addresses a significant research gap in the study of Rayleigh surface wave propagation within a piezoelectric medium characterized by piezoelectric properties, thermal effects and voids. Previous research has often overlooked the crucial aspects related to voids. This study aims to provide analytical solutions for Rayleigh waves propagating through a medium consisting of a nonlocal piezo-thermo-elastic material with voids under the Moore–Gibson–Thompson thermo-elasticity theory with memory dependencies.

Design/methodology/approach

The analytical solutions are derived using a wave-mode method, and roots are computed from the characteristic equation using the Durand–Kerner method. These roots are then filtered based on the decay condition of surface waves. The analysis pertains to a medium subjected to stress-free and isothermal boundary conditions.

Findings

Computational simulations are performed to determine the attenuation coefficient and phase velocity of Rayleigh waves. This investigation goes beyond mere calculations and examines particle motion to gain deeper insights into Rayleigh wave propagation. Furthermore, this investigates how kernel function and nonlocal parameters influence these wave phenomena.

Research limitations/implications

The results of this study reveal several unique cases that significantly contribute to the understanding of Rayleigh wave propagation within this intricate material system, particularly in the presence of voids.

Practical implications

This investigation provides valuable insights into the synergistic dynamics among piezoelectric constituents, void structures and Rayleigh wave propagation, enabling advancements in sensor technology, augmented energy harvesting methodologies and pioneering seismic monitoring approaches.

Originality/value

This study formulates a novel governing equation for a nonlocal piezo-thermo-elastic medium with voids, highlighting the significance of Rayleigh waves and investigating the impact of memory.

Details

International Journal of Numerical Methods for Heat & Fluid Flow, vol. 34 no. 4
Type: Research Article
ISSN: 0961-5539

Keywords

Article
Publication date: 17 July 2023

Anand Kumar Yadav, M.S. Barak and Vipin Gupta

This paper aims to study the impact of pyro-electricity, moisture and temperature diffusivity on the energy distribution of plane waves at the free surface of an orthotropic…

Abstract

Purpose

This paper aims to study the impact of pyro-electricity, moisture and temperature diffusivity on the energy distribution of plane waves at the free surface of an orthotropic piezo-hygro-thermo-elastic medium.

Design/methodology/approach

This study presents the novel creation of governing equations for an anisotropic piezothermoelastic medium with moisture impact, which is a significant contribution of this paper.

Findings

In addition to providing numerical data for the amplitude ratios and energy ratios of reflected waves, this study identifies five different kinds of coupled reflected plane waves, namely, quasi-longitudinal P wave, quasi-thermal wave, quasi-transverse wave, quasi-moisture wave and electric potential wave.

Research limitations/implications

The graphical analysis examines the impact of various factors, such as the angle of incidence, moisture and temperature diffusivity, pyro-electricity and frequency, on energy distribution.

Practical implications

This paper's results significantly impact the development of more efficient piezoelectric materials and their applications in geophysics.

Originality/value

The authors of the submitted document initiated and produced it collectively, with equal contributions from all members.

Details

International Journal of Numerical Methods for Heat & Fluid Flow, vol. 33 no. 10
Type: Research Article
ISSN: 0961-5539

Keywords

Article
Publication date: 5 October 2023

Vipin Gupta and M.S. Barak

This study aims to examine the impacts of higher memory dependencies on a novel semiconductor material that exhibits generalized photo-piezo-thermo-elastic properties…

Abstract

Purpose

This study aims to examine the impacts of higher memory dependencies on a novel semiconductor material that exhibits generalized photo-piezo-thermo-elastic properties. Specifically, the research focuses on analyzing the behavior of the semiconductor under three distinct temperature models.

Design/methodology/approach

The study assumes a homogeneous and orthotropic piezo-semiconductor medium during photo-thermal excitation. The field equations have been devised to encompass higher order parameters, temporal delays and a specifically tailored kernel function to address the problem. The eigenmode technique is used to solve these equations and derive analytical expressions.

Findings

The research presents graphical representations of the physical field distribution across different temperatures, higher order plasma heat conduction models and time. The results reveal that the amplitude of the distribution profile is markedly affected by factors such as the memory effect, time, conductive temperature and spatial coordinates. These factors cannot be overlooked in the analysis and design of the semiconductor.

Research limitations/implications

Specific cases are also discussed in detail, offering the potential to advance the creation of precise models and facilitate future simulations.

Practical implications

The research offers valuable information on the physical field distribution across various temperatures, allowing engineers and designers to optimize the design of semiconductor devices. Understanding the impact of memory effect, time, conductive temperature and spatial coordinates enables device performance and efficiency improvement.

Originality/value

This manuscript is the result of the joint efforts of the authors, who independently initiated and contributed equally to this study.

Details

International Journal of Numerical Methods for Heat & Fluid Flow, vol. 34 no. 1
Type: Research Article
ISSN: 0961-5539

Keywords

Article
Publication date: 18 October 2022

Vipin Gupta, Rajesh Kumar, Manjeet Kumar, Vijayata Pathania and M.S. Barak

This paper aims to study the variation of energy ratios of different reflected and transmitted waves by calculating the amplitude ratios.

Abstract

Purpose

This paper aims to study the variation of energy ratios of different reflected and transmitted waves by calculating the amplitude ratios.

Design/methodology/approach

This investigation studied the reflection and transmission of plane waves on an interface of nonlocal orthotropic piezothermoelastic space (NOPHS) and fluid half-space (FHS) in reference to dual-phase-lag theory under three different temperature models, namely, without-two-temperature, classical-two-temperature, and hyperbolic-two-temperature with memory-dependent derivatives (MDDs).

Findings

The primary (P) plane waves propagate through FHS and strike at the interface x3 = 0. The results are one wave reflected in FHS and four waves transmitted in NOPHS. It is noticed that these ratios are observed under the impact of nonlocal, dual-phase-lag (DPL), two-temperature and memory-dependent parameters and are displayed graphically. Some particular cases are also deduced, and the law of conservation of energy across the interface is justified.

Research limitations/implications

According to the available literature, there is no substantial research on the considered model incorporating NOPHS and FHS with hyperbolic two-temperature, DPL and memory.

Practical implications

The current model may be used in various fields, including earthquake engineering, nuclear reactors, high particle accelerators, aeronautics, soil dynamics and so on, where MDDs and conductive temperature play a significant role. Wave propagation in a fluid-piezothermoelastic media with different characteristics such as initial stress, magnetic field, porosity, temperature, etc., provides crucial information about the presence of new and modified waves, which is helpful in a variety of technical and geophysical situations. Experimental seismologists, new material designers and researchers may find this model valuable in revising earthquake estimates.

Social implications

The researchers may classify the material using the two-temperature parameter and the time-delay operator, where the parameter is a new indication of its capacity to transmit heat in interaction with various materials.

Originality/value

The submitted manuscript is original work done by the team of said authors and each author contributed equally to preparing this manuscript.

Details

International Journal of Numerical Methods for Heat & Fluid Flow, vol. 33 no. 2
Type: Research Article
ISSN: 0961-5539

Keywords

Article
Publication date: 15 March 2023

M.S. Barak, Rajesh Kumar, Rajneesh Kumar and Vipin Gupta

This paper aims to study the energy ratios of plane waves on an imperfect interface of elastic half-space (EHS) and orthotropic piezothermoelastic half-space (OPHS).

Abstract

Purpose

This paper aims to study the energy ratios of plane waves on an imperfect interface of elastic half-space (EHS) and orthotropic piezothermoelastic half-space (OPHS).

Design/methodology/approach

The dual-phase lag (DPL) theory with memory-dependent derivatives is employed to study the variation of energy ratios at the imperfect interface.

Findings

A plane longitudinal wave (P) or transversal wave (SV) propagates through EHS and strikes at the interface. As a result, two waves are reflected, and four waves are transmitted, as shown in Figure 2. The amplitude ratios are determined by imperfect boundaries having normal stiffness and transverse stiffness. The variation of energy ratios is computed numerically for a particular model of graphite (EHS)/cadmium selenide (OPHS) and depicted graphically against the angle of incidence to consider the effect of stiffness parameters, memory and kernel functions.

Research limitations/implications

The energy distribution of incident P or SV waves among various reflected and transmitted waves, as well as the interaction of waves for imperfect interface (IIF), normal stiffness interface (NSIF), transverse stiffness interface (TSIF), and welded contact interface (WCIF), are important factors to consider when studying seismic wave behavior.

Practical implications

The present model may be used in various disciplines, such as high-energy particle physics, earthquake engineering, nuclear fusion, aeronautics, soil dynamics and other areas where memory-dependent derivative and phase delays are significant.

Originality/value

In a variety of technical and geophysical scenarios, wave propagation in an elastic/piezothermoelastic medium with varying magnetic fields, initial stress, temperature, porosity, etc., gives important information regarding the presence of new and modified waves.

Details

Multidiscipline Modeling in Materials and Structures, vol. 19 no. 3
Type: Research Article
ISSN: 1573-6105

Keywords

Book part
Publication date: 19 January 2023

Sunaina Gowan

Abstract

Details

The Ethnically Diverse Workplace: Experience of Immigrant Indian Professionals in Australia
Type: Book
ISBN: 978-1-80382-053-8

Article
Publication date: 23 September 2024

Mariana Pinho and Belinda Colston

The current study explores the role of social psychological factors on organizational commitment. It examined the relationships between organizational fairness, inclusion…

Abstract

Purpose

The current study explores the role of social psychological factors on organizational commitment. It examined the relationships between organizational fairness, inclusion, diversity, sexism, psychological safety and affective commitment.

Design/methodology/approach

The study adopted a cross-sectional survey method where data were collected from staff across six higher education institutions in the United Kingdom. A total of 416 responses were collected and the data were analyzed by employing independent sample t-tests to explore gender differences regarding organizational diversity, inclusion, fairness, sexism, psychological safety and affective commitment. The mediating role of psychological safety in the effects of organizational diversity, fairness, inclusion and sexism on staff’s commitment to the organization was evaluated through a series of simple mediation models. Finally, the mediated effect of organizational social psychological factors on affective commitment through psychological safety, moderated by gender was tested.

Findings

As hypothesized, men had higher perceptions of organizational inclusion and diversity and viewed their organization as less sexist. Psychological safety mediated the positive effects of organizational diversity, fairness, inclusion and sexism on staff’s affective commitment to the organization. Organizational diversity and sexism played a bigger part in how women evaluate their organizational environment as safe to take risks and be themselves and consequently on how they commit to the organization. On the other hand, organizational fairness and inclusion seem more closely tied to men’s evaluation of their organization as safe to be themselves and consequently stronger commitment.

Originality/value

The findings shed light on the underlying mechanisms that shape affective commitment, that can lead to more inclusive work environments and contribute to systemic change in the Higher Education context.

Details

Equality, Diversity and Inclusion: An International Journal, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 2040-7149

Keywords

Content available
Book part
Publication date: 16 August 2021

Abstract

Details

Intercultural Management in Practice
Type: Book
ISBN: 978-1-83982-827-0

Article
Publication date: 13 June 2020

Rima'a Da'as, Abeer Watted and Miri Barak

The study aims to test an innovative model that explores the direct and indirect relationships between principals' innovative behavior, climate of organizational learning and a…

Abstract

Purpose

The study aims to test an innovative model that explores the direct and indirect relationships between principals' innovative behavior, climate of organizational learning and a teacher's intent to leave his or her school and take a voluntary absence.

Design/methodology/approach

Data were collected from a survey of 1,529 teachers from 107 Arab elementary schools randomly selected from the database of the Israeli educational system. To test the proposed multilevel model, we conducted multilevel structural equation modeling (ML-SEM).

Findings

The analysis confirmed that organizational learning climate is a prominent mediator between principals' innovative behavior and a teacher's intent to leave and his/her voluntary absence.

Originality/value

This research advances our understanding of leaders' innovative construct in an educational context and adds to the body of research directed at identifying administrative support and work-related factors that may negatively relate to a teacher's absenteeism or intent to leave and are amenable to leadership intervention.

Details

International Journal of Educational Management, vol. 34 no. 8
Type: Research Article
ISSN: 0951-354X

Keywords

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