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1 – 10 of 149
Article
Publication date: 19 September 2022

Muhammad Yasir and Azeem Jan

Leadership literature has identified that the servant leadership style can reduce employee negative work outcomes, even in challenging work environments like the…

Abstract

Purpose

Leadership literature has identified that the servant leadership style can reduce employee negative work outcomes, even in challenging work environments like the health-care sector as nurses play an important role in the performance of a hospital. That is why, the efficiency and effectiveness of the nurses are believed to be directly linked to improved health benefits to the public. So, this study aims to investigate the inter-relationship between servant leadership, organizational justice and workplace deviance of nurses in public sector hospitals.

Design/methodology/approach

A self-administrated questionnaire using a drop-and-collect method was used for collecting the data from nurses working in the public sector hospitals of Pakistan using a convenient sampling technique. In total, 370 questionnaires were distributed among the nursing staff, of which 201 completed and usable questionnaires were returned and used for data analysis. Further, the partial least squares structural equation modeling approach is used in this study using SmartPLS version 3 software to test the hypothesized model and determine the direct and indirect effects.

Findings

Results showed a negative relationship between servant leadership and workplace deviance, positive relationship between servant leadership and organizational justice, negative relationship between organizational justice and workplace deviance and that organizational justice mediates in the relationship between servant leadership and workplace deviance.

Practical implications

This study provides valuable recommendations and practical implications to address the nurses’ deviant workplace behaviors in the public sector hospitals of Pakistan.

Originality/value

This study is novel as it shows the significance of servant leadership behavior which has the ability to positively influence organizational justice perception leading to less likelihood of the emergence of nurses’ deviant workplace behavior, specifically in the context of public sector hospitals of Pakistan.

Details

Leadership in Health Services, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 1751-1879

Keywords

Article
Publication date: 21 July 2020

Yasir Khan

In the nonlinear model of reaction–diffusion, the Fitzhugh–Nagumo equation plays a very significant role. This paper aims to generate innovative solitary solutions of the…

Abstract

Purpose

In the nonlinear model of reaction–diffusion, the Fitzhugh–Nagumo equation plays a very significant role. This paper aims to generate innovative solitary solutions of the Fitzhugh–Nagumo equation through the use of variational formulation.

Design/methodology/approach

The partial differential equation of Fitzhugh–Nagumo is modified by the appropriate wave transforms into a dimensionless nonlinear ordinary differential equation, which is solved by a semi-inverse variational method.

Findings

This paper uses a variational approach to the Fitzhugh–Nagumo equation developing new solitary solutions. The condition for the continuation of new solitary solutions has been met. In addition, this paper sets out the Fitzhugh–Nagumo equation fractal model and its variational principle. The findings of the solitary solutions have shown that the suggested method is very reliable and efficient. The suggested algorithm is very effective and is almost ideal for use in such problems.

Originality/value

The Fitzhugh–Nagumo equation is an important nonlinear equation for reaction–diffusion and is typically used for modeling nerve impulses transmission. The Fitzhugh–Nagumo equation is reduced to the real Newell–Whitehead equation if β = −1. This study provides researchers with an extremely useful source of information in this area.

Details

International Journal of Numerical Methods for Heat & Fluid Flow, vol. 31 no. 4
Type: Research Article
ISSN: 0961-5539

Keywords

Article
Publication date: 6 August 2021

Yasir Khan

Nizhnik–Novikov–Veselov system (NNVS) is a well-known isotropic extension of the Lax (1 + 1) dimensional Korteweg-deVries equation that is also used as a paradigm for an…

Abstract

Purpose

Nizhnik–Novikov–Veselov system (NNVS) is a well-known isotropic extension of the Lax (1 + 1) dimensional Korteweg-deVries equation that is also used as a paradigm for an incompressible fluid. The purpose of this paper is to present a fractal model of the NNVS based on the Hausdorff fractal derivative fundamental concept.

Design/methodology/approach

A two-scale transformation is used to convert the proposed fractal model into regular NNVS. The variational strategy of well-known Chinese scientist Prof. Ji Huan He is used to generate bright and exponential soliton solutions for the proposed fractal system.

Findings

The NNV fractal model and its variational principle are introduced in this paper. Solitons are created with a variety of restriction interactions that must all be applied equally. Finally, the three-dimensional diagrams are displayed using an appropriate range of physical parameters. The results of the solitary solutions demonstrated that the suggested method is very accurate and effective. The proposed methodology is extremely useful and nearly preferable for use in such problems.

Practical implications

The research study of the soliton theory has already played a pioneering role in modern nonlinear science. It is widely used in many natural sciences, including communication, biology, chemistry and mathematics, as well as almost all branches of physics, including nonlinear optics, plasma physics, fluid dynamics, condensed matter physics and field theory, among others. As a result, while constructing possible soliton solutions to a nonlinear NNV model arising from the field of an incompressible fluid is a popular topic, solving nonlinear fluid mechanics problems is significantly more difficult than solving linear ones.

Originality/value

To the best of the authors’ knowledge, for the first time in the literature, this study presents Prof. Ji Huan He's variational algorithm for finding and studying solitary solutions of the fractal NNV model. The reported solutions are novel and present a valuable addition to the literature in soliton theory.

Details

International Journal of Numerical Methods for Heat & Fluid Flow, vol. 32 no. 5
Type: Research Article
ISSN: 0961-5539

Keywords

Article
Publication date: 7 August 2021

Yasir Khan and Naeem Faraz

The purpose of this paper is to investigate the circuit analysis differential equations, which play an important role in the field of electrical and electronic…

Abstract

Purpose

The purpose of this paper is to investigate the circuit analysis differential equations, which play an important role in the field of electrical and electronic engineering, and it was necessary to propose a very simple and direct method to obtain approximate solutions for the linear or non-linear differential equations, which should be simple for engineers to understand.

Design/methodology/approach

This paper introduces a simple novel Maclaurin series method (MSM) to propose an approximate novel solution in the area of circuit analysis for linear and non-linear differential equations. These equations describe the alternating current circuit of the resistor–capacitor, which evaluates the effect of non-linear current resistance. Linear and non-linear differential equations are evaluated as a computational analysis to assist the research, which reveals that the MSM is incredibly simple and effective.

Findings

Simulation findings indicate that the achieved proposed solution using the novel suggested approach is identical to the exact solutions mentioned in the literature. As the Maclaurin series is available to all non-mathematicians, this paper reflects mostly on theoretical implementations of the numerous circuit problems that occur in the field of electrical engineering.

Originality/value

A very simple and efficient method has been proposed in this paper, which is very easy to understand for even non-mathematicians such as engineers. The paper introduced a method of the Maclaurin series to solve non-linear differential equations resulting from the study of the circuits. The MSM mentioned here will be a useful tool in areas of physical and engineering anywhere the problem of the circuits is studied.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering , vol. 40 no. 3
Type: Research Article
ISSN: 0332-1649

Keywords

Article
Publication date: 11 October 2018

Yasir Khan

This paper aims to study the two-dimensional steady magneto-hydrodynamic flow of a second-grade fluid in a porous channel using the homotopy perturbation method (HPM).

Abstract

Purpose

This paper aims to study the two-dimensional steady magneto-hydrodynamic flow of a second-grade fluid in a porous channel using the homotopy perturbation method (HPM).

Design/methodology/approach

The governing Navier–Stokes equations of the flow are reduced to a third-order nonlinear ordinary differential equation by a suitable similarity transformation. Analytic solution of the resulting differential equation is obtained using the HPM. Mathematica software is used to visualize the flow behavior. The effects of the various parameters on velocity field are analyzed through appropriate graphs.

Findings

It is found that x component of the velocity increases with the increase of the Hartman number when the transverse direction variable ranges from 0 to 0.2 and the reverse behavior is observed when transverse direction variable takes values between 0.2 and 0.5. It is noted that the y component of the velocity increases rapidly with the increase of the transverse direction variable. The y component of the velocity increases marginally with the increase of the Hartman number M. The effect of the Reynolds number R on the x and y components of the velocity is quite opposite to the effect of the Hartman number on the x and y components of the velocity and the effect of the parameter on the x and y components of the velocity is similar to that of the Reynolds number.

Originality/value

To the best of the author’s knowledge, nobody had tried before two-dimensional steady magneto-hydrodynamic flow of a second-grade fluid in a porous channel using the HPM.

Details

International Journal of Numerical Methods for Heat & Fluid Flow, vol. 28 no. 10
Type: Research Article
ISSN: 0961-5539

Keywords

Article
Publication date: 1 March 2021

Yasir Khan

The nonlinear Schrödinger equation plays a vital role in wave mechanics and nonlinear optics. The purpose of this paper is the fractal paradigm of the nonlinear…

Abstract

Purpose

The nonlinear Schrödinger equation plays a vital role in wave mechanics and nonlinear optics. The purpose of this paper is the fractal paradigm of the nonlinear Schrödinger equation for the calculation of novel solitary solutions through the variational principle.

Design/methodology/approach

Appropriate traveling wave transform is used to convert a partial differential equation into a dimensionless nonlinear ordinary differential equation that is handled by a semi-inverse variational technique.

Findings

This paper sets out the Schrödinger equation fractal model and its variational principle. The results of the solitary solutions have shown that the proposed approach is very accurate and effective and is almost suitable for use in such problems.

Practical implications

Nonlinear Schrödinger equation is an important application of a variety of various situations in nonlinear science and physics, such as photonics, the theory of superfluidity, quantum gravity, quantum mechanics, plasma physics, neutron diffraction, nonlinear optics, fiber-optic communication, capillary fluids, Bose–Einstein condensation, magma transport and open quantum systems.

Originality/value

The variational principle of the Schrödinger equation without the Lagrange multiplier method in the sense of the fractal calculus is developed for the first time in the literature to the best of the author's understanding.

Details

Multidiscipline Modeling in Materials and Structures, vol. 17 no. 3
Type: Research Article
ISSN: 1573-6105

Keywords

Article
Publication date: 14 August 2017

Yasir Khan, Alborz Mirzabeigy and Hanieh Arjmand

The purpose of this paper is to present an analytical approximate solution of the nonlinear mathematical model of the bifilar pendulum.

Abstract

Purpose

The purpose of this paper is to present an analytical approximate solution of the nonlinear mathematical model of the bifilar pendulum.

Design/methodology/approach

First, the equation of motion derived based on the classical dynamics law by only an angular oscillation assumption and vertical oscillation is neglected. The energy balance method is applied to solve an established model and an analytical formulation has been obtained for the nonlinear frequency of the bifilar pendulum.

Findings

A comparison of results with those obtained by a numerical solution of the exact model (without any simplifications) shows the precise accuracy even for a large amplitude of oscillation.

Originality/value

The proposed model and solution are relatively simple and can be applied instead to a linear model for achieving accurate results.

Details

Multidiscipline Modeling in Materials and Structures, vol. 13 no. 2
Type: Research Article
ISSN: 1573-6105

Keywords

Article
Publication date: 21 April 2022

Muhammad Yaseen Bhutto, Myriam Ertz, Yasir Ali Soomro, Mussadiq Ali Ali Khan and Waheed Ali

The purpose of this study is to develop an extended theory of planned behavior (TPB) model by adding religious commitment (RC) and self-efficacy as internal variables and…

Abstract

Purpose

The purpose of this study is to develop an extended theory of planned behavior (TPB) model by adding religious commitment (RC) and self-efficacy as internal variables and investigating the effect of these variables on attitudes toward halal cosmetics. In addition, this study also examined the moderating role of halal literacy in the relationships between attitudes (ATT), subjective norms (SN), perceived behavioral control (PBC) and intentions to purchase halal cosmetics.

Design/methodology/approach

The method of data collection used was self-administered surveys with customers in two stores in Karachi, Pakistan, yielding 267 valid questionnaires. To guarantee validity and reliability, convergent and discriminant validity analyses were conducted, and structural equation modeling was advanced to assess the relationships between variables using smart partial least squares 3.0 software. The interaction moderation technique has been used to examine the moderating effect of halal literacy on the purchase intention (PI) of halal cosmetics.

Findings

The results show that RC and self-efficacy both significantly impact the attitudes of Gen Y. Normative beliefs also had a significant relationship with SN. Further, ATT and SN had a significant relationship with PI of halal cosmetics, while PBC was nonsignificant. Furthermore, halal literacy is found to have a positive moderating influence on ATT and PI, and SN and PI. Finally, the moderating effect of halal literacy does not exist in the relationship between PBC and PI.

Research limitations/implications

Participants’ characteristics should vary for future studies, and larger sample sizes may yield different results. It is critical for managers working in the cosmetic industry to monitor Muslim consumption patterns to develop strategies to reach Muslim consumers. This study reveals the effect of RC, self-efficacy and the moderating role of halal literacy on the behavioral attitudes of a booming market sector, which can guide marketing managers in developing more effective advertising campaigns.

Originality/value

This paper contributes to the halal consumption literature by exploring RC and self-efficacy as constructs for the very first time in the TPB model. To the best of the authors’ knowledge, this study is the first to explore the influence of halal literacy on Gen Y Pakistani Muslim consumer behavioral intention toward halal cosmetic products using the TPB model. The paper offers an extended TPB model framework that may be of interest to scholars, marketers and policymakers.

Details

Journal of Islamic Marketing, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 1759-0833

Keywords

Open Access
Article
Publication date: 22 February 2011

Zaid Ahmad Wani, Arshad Hussain, Abdul Wahid Khan, M Maqbool Dar, AkashYousf Khan, Yasir H. Rather and Sheikh Shoib

Suicide and attempted suicide is an important health issue and the number of people who die of suicide exceeds that of conflicts. Kashmir has been suffering from a low…

Abstract

Suicide and attempted suicide is an important health issue and the number of people who die of suicide exceeds that of conflicts. Kashmir has been suffering from a low intensity war since last 20 years in which thousands have been killed or injured. There has been phenomenal increase in cases of psychological disorders along with suicide and and suicide attempters. Suicide in a conflict zone is viewed with indifference due to focus on the physical part of trauma. Difficulties faced by the suicidal patient and his attendants are seldom highlighted. 1408 patients who reported to emergency room for suicide attempt from 2000 to 2008 were taken for the study. All the patients underwent the hospital protocol for poisoning management. Patients were subjected to detailed psychiatric evaluation and questions were specifically asked about the difficulties encountered during management. Most of the cases were females with 92.11% belonging to the Muslim religion. 76.20% cases were from a rural background. 32.5% had been referred because of the lack of specific antidotes. Forty-three percent required arrangement of transportation by their own family members. Fifty-seven percent had been stopped for security checks along the way. Seventy-three percent felt that the attitude of the staff hostile. Twenty-three percent of patients had to share a bed. Almost all patients were questioned by security agencies within the hospital. More than 68% patient reported hostility amongst their neighbors. Suicidal poisoning is a significant health problem in Kashmir and management of these cases is fraught with difficulties across the spectrum of health care. Educating the doctors at primary care about first aid, improvement in community services followed by long term resolution of the conflict would go some way in alleviating the difficulties faced by a suicidal patient and his family in a conflict zone.

Details

Mental Illness, vol. 3 no. 1
Type: Research Article
ISSN: 2036-7465

Keywords

Article
Publication date: 1 January 2014

Yasir Khan

This paper aims to suggest a novel modified Laplace decomposition method (MLDM) for MHD flow over a non-linear stretching sheet with slip condition by suitable choice of…

Abstract

Purpose

This paper aims to suggest a novel modified Laplace decomposition method (MLDM) for MHD flow over a non-linear stretching sheet with slip condition by suitable choice of an initial solution.

Design/methodology/approach

The governing partial differential equations are converted into dimensionless non-linear ordinary differential equation by similarity transformation, which is solved by MLDM. The method is based on the application of Laplace transform to boundary layers in fluid mechanics. The non-linear term can be easily handled by the use of He's polynomials.

Findings

The series solution of the MHD flow of an incompressible viscous fluid over a non-linear stretching sheet subject to slip condition is obtained. An excellent agreement between the MLDM and HPM is achieved. Convergence of the obtained series solution is properly checked by using the ratio test.

Practical implications

Stretching surface is an important type of flow occurring in a number of engineering processes such as heat-treated materials travelling between a feed roll and a wind up roll, aerodynamic extrusion of plastic sheets, glass fiber and paper production, cooling of an infinite metallic plate in a cooling path, manufacturing of polymeric sheets are few examples of flow due to stretching surfaces. This work provides a very useful source of information for researchers on this subject.

Originality/value

Such flow analysis is even not available yet for the hydrodynamic fluid. The series solution for MHD boundary layer problem with slip condition by means of MLDM is yet not available in the literature.

Details

International Journal of Numerical Methods for Heat & Fluid Flow, vol. 24 no. 1
Type: Research Article
ISSN: 0961-5539

Keywords

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