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1 – 4 of 4Mehmet Merdan, Ahmet Yildirim and Ahmet Gökdoğan
The purpose of this paper is to show how an application of fractional two dimensional differential transformation method (DTM) obtained approximate analytical solution of…
Abstract
Purpose
The purpose of this paper is to show how an application of fractional two dimensional differential transformation method (DTM) obtained approximate analytical solution of time‐fraction modified equal width wave (MEW) equation.
Design/methodology/approach
The fractional derivative is described in the Caputo sense.
Findings
It is indicated that the solutions obtained by the two dimensional DTM are reliable and that this is an effective method for strongly nonlinear partial equations.
Originality/value
The paper shows that exact solutions can also be obtained from the known forms of the series solutions.
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Mehmet Merdan, Ahmet Gökdoğan, Ahmet Yildirim and Syed Tauseef Mohyud‐Din
In this article, the aim is to obtain an approximate analytical solution of time‐fraction generalized Hirota‐Satsuma coupled KDV with the help of the two dimensional differential…
Abstract
Purpose
In this article, the aim is to obtain an approximate analytical solution of time‐fraction generalized Hirota‐Satsuma coupled KDV with the help of the two dimensional differential transformation method (DTM). Exact solutions can also be obtained from the known forms of the series solutions.
Design/methodology/approach
Two dimensional differential transformation method (DTM) is used.
Findings
In this paper, the fractional differential transformation method is implemented to the solution of time‐fraction generalized generalized Hirota‐Satsuma coupled KDV with a number of initial and boundary values has been proved. DTM can be applied to many complicated linear and strongly nonlinear partial differential equations and does not require linearization, discretization, restrictive assumptions or perturbation. The presented method is a numerical method based on the generalised Taylor series expansion which constructs an analytical solution in the form of a polynomial.
Originality/value
This is an original work in which the results indicate that the method is powerful and significant for solving time‐fraction generalized generalized Hirota‐Satsuma coupled KDV type differential equations.
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Aybegüm Güngördü Belbağ and Sedat Belbağ
Consumer skepticism hinders the growth of remanufactured products (RPs). Previous studies have explored factors influencing the intention to purchase RPs, overlooking consumer…
Abstract
Purpose
Consumer skepticism hinders the growth of remanufactured products (RPs). Previous studies have explored factors influencing the intention to purchase RPs, overlooking consumer resistance. This study aims to address this gap by integrating barriers, personal factors and outcome expectations – drawing on innovation resistance and social cognitive theories – from the perspective of higher education.
Design/methodology/approach
This study conducted semi-structured, in-depth interviews with 34 undergraduates at higher education institutions in Türkiye, and analyzed the data with reflexive thematic analysis.
Findings
Findings reveal that barriers (value, risk and image), personal factors (product knowledge and self-efficacy) and outcome expectations (green benefits, like-new quality and financial benefits) affect intention to purchase RPs.
Originality/value
Although higher education boosts sustainability awareness, research on university students’ barriers and intentions to purchase RPs is scarce. Prior research has only addressed risk and value barriers, product knowledge and perceived green benefits. None examined image barriers, self-efficacy, financial benefits and like-new quality. This study fills this gap by addressing higher education’s role in overcoming adoption barriers and enhancing outcome expectations. It also explores personal factors like self-efficacy, an underexplored area, that can be enhanced through social persuasion and mastery experiences.
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Selin Hanife Eryuruk, Burçak Karagüzel Kayaoglu and Fatma Kalaoglu
Surgical gowns should be designed and produced using special techniques to provide barrier properties against potential risks during surgery and healthcare procedures. Ultrasonic…
Abstract
Purpose
Surgical gowns should be designed and produced using special techniques to provide barrier properties against potential risks during surgery and healthcare procedures. Ultrasonic welding is one of these methods used to produce surgical gowns with determined barrier properties. The purpose of this paper is to analyse bond strength and permeability properties of ultrasonically welded nonwoven fabrics and compare them with traditional sewing techniques.
Design/methodology/approach
In this study, ultrasonic welding of nonwovens was performed to demonstrate its use as an assembly method. Performance requirements in the design of surgical gowns were determined. Fabric strengths and bond strengths of ultrasonic-welded and traditionally sewn fabrics were analysed. The performance properties, i.e., bond strength, air and water resistance of the fabrics and the joints obtained by ultrasonic and classical sewing methods were studied.
Findings
As a result, it was found that ultrasonic welding technique is a suitable method for joining layers in surgical gown production bringing the advantages of high water resistance together with acceptable bond strength.
Originality/value
The current study focuses on the use of ultrasonic welding of nonwovens used for disposable protective surgical gowns. Ultrasound welding technique was presented as an alternative to classic assembly methods and ultrasonic welding technology was applied to different fabric combinations simulating different layers in different joining sections of a surgical gown.
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