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Article
Publication date: 9 October 2024

Nepal Chandra Roy, Md. Mahmudul Hassan and Saeed Dinarvand

This study aims to analyze the thermo-hydrodynamic characteristics for the mixed convection boundary layer flow of three-particle aqueous nanofluid on a shrinking porous plate…

Abstract

Purpose

This study aims to analyze the thermo-hydrodynamic characteristics for the mixed convection boundary layer flow of three-particle aqueous nanofluid on a shrinking porous plate with the influences of thermal radiation and magnetic field.

Design/methodology/approach

The basic equations have been normalized with the help of similarity transformations. The obtained equations have been solved numerically using the shooting method in conjunction with the sixth-order Runge–Kutta technique. Numerical results for the velocity and temperature are illustrated with varying relevant parameters.

Findings

The results reveal that the local drag coefficient increases with higher values of the magnetic field parameter, nanoparticle volume fraction and suction parameter. On the other hand, boosting the radiation parameter and nanoparticle concentration notably enhances heat transfer. Furthermore, it is noted that the suction parameter and magnetic field parameter both lead to an increase in velocity and promote the occurrence of dual solutions within the problem conditions.

Research limitations/implications

The limitations are that the model is appropriate for thermal equilibrium of base fluid and nanoparticles, and constant thermo-physical properties.

Originality/value

To the best of the authors' knowledge, no study has taken an attempt to predict the flow and heat transfer characteristics of unsteady mixed convection ternary hybrid nanofluid flow over a shrinking sheet, particularly under the influence of magnetic field and radiation. The findings obtained here may hold particular significance for those interested in the underlying theoretical and practical implications.

Details

International Journal of Numerical Methods for Heat & Fluid Flow, vol. 34 no. 12
Type: Research Article
ISSN: 0961-5539

Keywords

Article
Publication date: 10 September 2024

Shanshan Shang and Sen Geng

Drawing on dual process theory as the overarching framework, this study investigates how different types of incidental vocabulary learning yield different performance, repetition…

Abstract

Purpose

Drawing on dual process theory as the overarching framework, this study investigates how different types of incidental vocabulary learning yield different performance, repetition, and continuance intention outcomes and uncovers the underlying mechanism.

Design/methodology/approach

We identify four popular types of incidental learning: traditional, a murder mystery game, noneducational live streaming, and VTuber. We propose that the underlying mechanism is the mediating role of perceived novelty as heuristic processing, and effort and performance expectancy as systematic processing. We conduct a between-subject experiment with four groups for the four types of incidental learning. From a total of 220 subjects, 55 valid responses were collected from each group. Analysis of variance and a partial least squares structural equation model are employed to examine the differences and mechanism.

Findings

The results show that noneducational live streaming performs significantly best for all three outcomes. The mechanism test demonstrates that perceived novelty and performance expectancy play significantly positive mediating roles, whereas effort expectancy has a null mediating effect.

Originality/value

The research provides both theoretical and practical implications.

Details

Library Hi Tech, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 0737-8831

Keywords

Article
Publication date: 5 November 2024

Amir Ghajarieh, Sara Vafaei and Mohammad Amin Mozaheb

The impact of teachers' positive psychology (PP) beliefs on their practices and the consequential influence on teaching processes and learning outcomes has been widely…

Abstract

Purpose

The impact of teachers' positive psychology (PP) beliefs on their practices and the consequential influence on teaching processes and learning outcomes has been widely acknowledged. In line with PP in education, this research endeavors to examine the interconnectedness of Iranian English as a Foreign Language (EFL) teachers’ beliefs and their classroom practices regarding establishing a positive classroom environment.

Design/methodology/approach

Using a purely qualitative approach, this study utilizes interviews and classroom observations as methods of data collection. To explore the beliefs of six female teachers and a number of their students, the researchers adapted selected prompts from the “What is happening in this class?” questionnaire developed by Fraser et al. (1996) into interview questions. The researchers also conducted classroom observations to gather information on the teachers' implementation of practices that contribute to a positive classroom environment.

Findings

By triangulating the interview data with the qualitative observations, the findings revealed a discrepancy between the teachers' cognition and their actual classroom practices concerning the establishment of a positive classroom environment. Students’ interviews also revealed the teacher participants' actual practices did not align with their cognitive beliefs.

Originality/value

The findings have significant implications for creating a positive environment in the post-pandemic era, suggesting a need for professional development and support for teachers in aligning their beliefs on positive psychology with their practices through qualitative enquiry.

Details

Qualitative Research Journal, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 1443-9883

Keywords

Article
Publication date: 7 November 2024

Mohanaphriya US and Tanmoy Chakraborty

This research focuses on the controlling irreversibilities in a radiative, chemically reactive electromagnetohydrodynamics (EMHD) flow of a nanofluid toward a stagnation point…

Abstract

Purpose

This research focuses on the controlling irreversibilities in a radiative, chemically reactive electromagnetohydrodynamics (EMHD) flow of a nanofluid toward a stagnation point. Key considerations include the presence of Ohmic dissipation, linear thermal radiation, second-order chemical reaction with the multiple slips. With these factors, this study aims to provide insights for practical applications where thermal management and energy efficiency are paramount.

Design/methodology/approach

Lie group transformation is used to revert the leading partial differential equations into nonlinear ODE form. Hence, the solutions are attained analytically through differential transformation method-Padé and numerically using the Runge–Kutta–Fehlberg method with shooting procedure, to ensure the precise and reliable determination of the solution. This dual approach highlights the robustness and versatility of the methods.

Findings

The system’s entropy generation is enhanced by incrementing the magnetic field parameter (M), while the electric field (E) and velocity slip parameters (ξ) control its growth. Mass transportation irreversibility and the Bejan number (Be) are significantly increased by the chemical reaction rate (Cr). In addition, there is a boost in the rate of heat transportation by 3.66% while 0.05⩽ξ⩽0.2; meanwhile for 0.2⩽ξ⩽1.1, the rate of mass transportation gets enhanced by 12.87%.

Originality/value

This paper presents a novel approach to analyzing the entropy optimization in a radiative, chemically reactive EMHD nanofluid flow near a stagnation point. Moreover, this research represents a significant advancement in the application of analytical techniques, complemented by numerical approaches to study boundary layer equations.

Details

International Journal of Numerical Methods for Heat & Fluid Flow, vol. 34 no. 12
Type: Research Article
ISSN: 0961-5539

Keywords

Article
Publication date: 4 April 2023

Zohre Farzinfar, Amirreza Konjkav Monfared and Seyed Mohammad Tabataba’i-Nasab

The present study aims to identify the dimensions of destination psychological ownership (DPO) from tourists’ perspectives and to develop a reliable and valid measurement scale.

277

Abstract

Purpose

The present study aims to identify the dimensions of destination psychological ownership (DPO) from tourists’ perspectives and to develop a reliable and valid measurement scale.

Design/methodology/approach

The mixed method has been applied in this study for the development of a scale to measure psychological ownership (PO) of tourists. The first stage includes identifying the PO dimensions of tourists toward the tourist destinations through in-depth interviews with experts (university professors, managers and experts in the tourism industry). Theme analysis was applied to analyze the data in this stage. A quantitative survey was conducted among tourists during the second stage. Accordingly, a questionnaire was designed and its reliability and validity were investigated. Confirmatory factor analysis and structural equation modeling were used to examine the structural model and its validity.

Findings

The findings revealed that the DPO from tourists’ perspectives includes six dimensions for the sense of attachment, responsibility, the sense of trust, the sense of honor, the sense of gratification and self-identity toward tourist destinations. The validity of the conceptual model was confirmed according to the results of the quantitative section of the study.

Originality/value

The present study is one of the limited numbers of studies coping with PO, especially in the field of tourism, from the view of the consumer. The present study identifies the dimensions of the DPO of tourists and develops an instrument to measure them. Therefore, the developed questionnaire can be used as a valid and reliable instrument to measure the DPO in future research.

Details

Kybernetes, vol. 53 no. 7
Type: Research Article
ISSN: 0368-492X

Keywords

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