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1 – 10 of 225Chinedu Chinakwe, Adekunle Adelaja, Michael Akinseloyin and Olabode Thomas Olakoyejo
Inclination angle has been reported to have an enhancing effect on the thermal-hydraulic characteristics and entropy of some thermal systems. Therefore, this paper aims to…
Abstract
Purpose
Inclination angle has been reported to have an enhancing effect on the thermal-hydraulic characteristics and entropy of some thermal systems. Therefore, this paper aims to numerically investigate the effects of inclination angle, volume concentration and Reynolds number on the thermal and hydraulic characteristics and entropy generation rates of water-based Al2O3 nanofluids through a smooth circular aluminum pipe in a turbulent flow.
Design/methodology/approach
A constant heat flux of 2,000 Watts is applied to the circular surface of the tube. Reynolds number is varied between 4,000 and 20,000 for different volume concentrations of alumina nanoparticles of 0.5%, 1.0% and 2.0% for tube inclination angles of ±90o, ±60o, ±45o, ±30o and 0o, respectively. The simulation is performed in an ANSYS Fluent environment using the realizable kinetic energy–epsilon turbulent model.
Findings
Results show that +45o tube orientation possesses the largest thermal deviations of 0.006% for 0.5% and 1.0% vol. concentrations for Reynolds numbers 4,000 and 12,000. −45o gives a maximum pressure deviation of −0.06% for the same condition. The heat transfer coefficient and pressure drop give maximum deviations of −0.35% and −0.39%, respectively, for 2.0% vol. concentration for Reynolds number of 20,000 and angle ±90o. A 95%–99.8% and 95%–98% increase in the heat transfer and total entropy generation rates, respectively, is observed for 2.0% volume concentration as tube orientation changes from the horizontal position upward or downward.
Originality/value
Research investigating the effect of inclination angle on thermal-hydraulic performance and entropy generation rates in-tube turbulent flow of nanofluid is very scarce in the literature.
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Hannah Pitt, Simone McCarthy and Samantha Thomas
Gambling is well-recognised as a significant public health threat. However, current responses to gambling still primarily focus on individualised responsible gambling paradigms…
Abstract
Gambling is well-recognised as a significant public health threat. However, current responses to gambling still primarily focus on individualised responsible gambling paradigms, which neglects to consider the range of commercial and political determinants that contribute to gambling harm and how it might influence young people's gambling attitudes and consumption intentions. This includes the marketing tactics used by the gambling industry to normalise harmful gambling products as embedded in everyday life, including in sport. Young people have demonstrated an in-depth gambling brand awareness and can even recall specific strategies used in gambling advertising that might appeal to children. There have been continuous calls for action to protect children and young people from the commercial marketing of gambling products from a range of stakeholders, including young people and their parents. Young people and their parents are very supportive of increased regulations on gambling advertising, particularly during sport, and have called for sporting teams and codes to reject sponsorship deals with gambling companies. However, a heavy reliance on industry self-regulation has meant that governments across the world have decided that the costs associated with exposing children and young people to pervasive gambling marketing are outweighed by perceived benefits that gambling provides to businesses benefiting financially from gambling. Comprehensive curbs on marketing, as seen in tobacco, are required to significantly reduce young people's exposure to gambling advertising and ultimately prevent the next generation of harm.
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Thalia Anthony, Juanita Sherwood, Harry Blagg and Kieran Tranter
Elle Rochford, Baylee Hudgens and Rachel L. Einwohner
While social media data are used increasingly in studies of social movements, social media evolves far more rapidly than academic research and publication. This chapter argues…
Abstract
While social media data are used increasingly in studies of social movements, social media evolves far more rapidly than academic research and publication. This chapter argues that researchers should adopt historical and archival approaches to social media data. Treating social media data as an “instant archive” – one that is self-curated, is co-constituted, and changes rapidly – we caution researchers to pay attention to the features of this archive and their implications for working with the data therein. Applying insights from recent discussions of archival methods for social science research to the specific features of social media data, we explore how platform features, repressive effects, and user innovations affect the content of the instant archive. We then offer strategies for researchers' methodological approaches, including how best to select units of analysis and platforms, how to collect and interpret archival materials, and how to identify silences in the data.
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Aboubakeur Benariba, Ahmed Bouzidane, Hicham Aboshighiba and Mark Thomas
The purpose of this research is to study the dynamic behavior of hydrostatic squeeze film dampers made of four hydrostatic pads, fed through four capillary restrictors with…
Abstract
Purpose
The purpose of this research is to study the dynamic behavior of hydrostatic squeeze film dampers made of four hydrostatic pads, fed through four capillary restrictors with micropolar lubricant.
Design/methodology/approach
The modified version of Reynolds equation is solved numerically by the finite differences and the Gauss–Seidel methods to determine the pressure field generated on the hydrostatic bearing flat pads. In the first step, the effects of the pad dimension ratios on the stiffness and damping coefficients are investigated. In the second step, the damping factor is evaluated with respect to the micropolar properties.
Findings
The analysis revealed that the hydrostatic squeeze film dampers lubricated with micropolar lubricants produces the maximum damping factor for characteristic length of micropolar lubricant less than 5, while the same bearing operating with Newtonian lubricants reaches its maximum damping factor at eccentricity ratios larger than 0.4.
Originality/value
The results obtained show that the effects of micropolar lubricants on the dynamic performances are predominantly affected by the pad geometry and eccentricity ratio.
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Chanita Rukspollmuang, Jaratdao Reynolds and Praphan Chansema
Initiating a practical model for embedding transformative learning in education that will promote sustainable development is a challenge for higher education. Siam University…
Abstract
Initiating a practical model for embedding transformative learning in education that will promote sustainable development is a challenge for higher education. Siam University decided to assign a task force with the mission to work with communities in order to propose guidelines of learning for sustainability (LfS) based on real-life experiences. Selected communities which have agreed to be the community living labs for teaching and learning activities of the university were chosen based on the Bray and Thomas’ Cube Model. There are differences in sizes (number of members), locations (urban, suburban), and histories (old settlement with long history and rich culture and the newly settlement communities consisting of migrated members). Community-based participatory research (CBPR) was applied in the study. The initial model was developed from the synthesis of experiential work with communities in sustainability-related projects. After revision, the “Learning for Sustainability Action Model” was proposed. Success factors in implementing the model were also suggested.
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Christian M. Hines and LaNorris D. Alexander
Comics and graphic novels can disrupt traditional texts by challenging the “worship of the written word” (Torres, 2019), a feature of white supremacy that perpetuates textual…
Abstract
Comics and graphic novels can disrupt traditional texts by challenging the “worship of the written word” (Torres, 2019), a feature of white supremacy that perpetuates textual hierarchies within educational spaces. Giving all of our students access to contemporary literature that centers Black youth perspectives is not only important in decolonizing literature education but also in presenting a holistic view of Black childhood. They can be used in the classroom as subjects to challenge stereotypical depictions by centering experiences, ideas, and concepts that are often marginalized in traditional curriculum. Within this chapter, we focus on comics and graphic novels as tools to enact students’ multiliteracies and to analyze visual stories depicting BlackBoy adolescence, using the frameworks of BlackBoy Crit Pedagogy (Bryan, 2022), an equity framework that interrogates the interdisciplinary ways that Black boy students' literacy learning can be formed through the teaching and learning of Blackness, maleness, and the schooling experiences of Black boys. We utilize this framework to analyze the use of diverse comics and graphic novels to facilitate critical conversations of bringing inclusive visual texts into the classroom. We invite practitioners to reimagine curricular ideas and content centered on empowerment and Black boy adolescence and how those ideas are presented to youth through a variety of visual narratives.
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Martin Götz and Ernest H. O’Boyle
The overall goal of science is to build a valid and reliable body of knowledge about the functioning of the world and how applying that knowledge can change it. As personnel and…
Abstract
The overall goal of science is to build a valid and reliable body of knowledge about the functioning of the world and how applying that knowledge can change it. As personnel and human resources management researchers, we aim to contribute to the respective bodies of knowledge to provide both employers and employees with a workable foundation to help with those problems they are confronted with. However, what research on research has consistently demonstrated is that the scientific endeavor possesses existential issues including a substantial lack of (a) solid theory, (b) replicability, (c) reproducibility, (d) proper and generalizable samples, (e) sufficient quality control (i.e., peer review), (f) robust and trustworthy statistical results, (g) availability of research, and (h) sufficient practical implications. In this chapter, we first sing a song of sorrow regarding the current state of the social sciences in general and personnel and human resources management specifically. Then, we investigate potential grievances that might have led to it (i.e., questionable research practices, misplaced incentives), only to end with a verse of hope by outlining an avenue for betterment (i.e., open science and policy changes at multiple levels).
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Literature has recognised entrepreneurship education as the main conduit through which entrepreneurial behaviours, attitudes and actions can be built, enacted and delivered. Since…
Abstract
Literature has recognised entrepreneurship education as the main conduit through which entrepreneurial behaviours, attitudes and actions can be built, enacted and delivered. Since the founding of new ventures is largely a resourceful founder-driven enterprise, entrepreneurship education has largely centred on galvanising and shifting the mindsets and cognition of the entrepreneur. Yet, despite over 60 years of delivering entrepreneurship education programmes, hard evidence of the generation of high-growth-oriented and sustainable ventures has been scarce as student entrepreneurship intentions do not always translate into successful venture creation. This is largely because of the complexities of the practicality of entrepreneurial education particularly, the dissonance between acquired education in business schools and the knowledge and competencies needed in the entrepreneurial field. Such dissonance can be attributed to the lack of clarity on the pedagogical approach that most resonates with entrepreneurial action, the diversity in assessment methods and the scholarly illusion pertaining to how pedagogical approaches can be channelled to the generation of growth-oriented ventures. Drawing on Girox's concepts of transformative critical pedagogy (including pedagogy of repression), Socratic dialogue, Hegelian dialectic and Yrjö Engeström's transformative expansive agency, I demonstrate how a flipped transformative critical pedagogy can be harnessed in digitally enhanced learning environments to create new entrepreneurial possibilities for facilitating critical inquiry, complex problem-solving, innovation for the market and fostering tolerance for failure in ambiguous entrepreneurial contexts.
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Noora Arantola and Mari Juntunen
This study aims to increase the understanding of the emergence of a values-based (VB) premium private label (PL) brand reputation within a multiple-tier PL brand portfolio in…
Abstract
Purpose
This study aims to increase the understanding of the emergence of a values-based (VB) premium private label (PL) brand reputation within a multiple-tier PL brand portfolio in retailing.
Design/methodology/approach
By building on the research on PLs, brand image, brand reputation and consumer values, this study creates a conceptual foundation for the emergence of VB PL brand reputation within a multiple-tier brand portfolio among consumers and examines the emergence of such reputation empirically using interpretive exploratory qualitative laddering interviews in the context of fast-moving consumer goods.
Findings
The findings of this study illustrate that the VB reputations of the premium PL product brand and the PL brand store intertwine, ultimately relating to two terminal values: pleasure and doing good. These reputations differ remarkably from the VB reputations of the economy PL brand and the umbrella brand of the retail chain (not doing good and financial security).
Research limitations/implications
This study explains the emergence of VB brand reputation within a multiple-tier brand portfolio and introduces the use of the laddering technique in such research.
Practical implications
This study reminds brand managers to carefully design the relevant brand strategy for brands and their relationships under a brand umbrella.
Originality/value
Although much is known about PL brands and brand reputation, to the best of the authors’ knowledge, this study might be the first to increase the understanding of how a VB premium PL brand reputation emerges and accumulates from brand images within a multiple-tier brand portfolio.
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