Search results

The study aims to explore how Soret and Dufour diffusions, thermal radiation, joule heating and magnetohydrodynamics (MHD) affect the flow of hybrid nanofluid (Al₂O₃-SiO₂/water) over a porous medium using a mobile slender needle.

To streamline the analysis, the authors apply appropriate transformations to change the governing model of partial differential equations into a group of ordinary differential equations. Following this, the authors analyze the transformed equations using the homotopy analysis method within Mathematica software, leading to the derivation of analytical solutions. This study investigates how changing values for porous medium, MHD, Soret and Dufour numbers and thermal radiation influence concentration, temperature and velocity profiles. In addition, the research assesses the effects on local Sherwood number, skin friction and Nusselt number.

In this investigation, the authors explore the movement of a needle away from its origin ( ε > 0). As the magnetic and porous medium parameters increase, there is a correspondence decrease in the velocity profile. Simultaneously, an increase in the Dufour number and thermal radiation parameter yields to a higher temperature profile, whereas arise in the Soret number results in an enhanced concentration profile. Furthermore, growth in the magnetic field parameter is correlated with a reduction in skin friction, Nusselt and Sherwood numbers. In addition, an examination of the data reveals that an escalation in the thermal radiation parameter is associated with an elevation in the Nusselt number. Moreover, an elevation in the Dufour number results in an augmentation in the Nusselt number.

These results have practical applications across diverse fields, including heat transfer enhancement, energy conversion systems, advanced manufacturing and material processing.

This study is distinctive in its investigation of the flow of hybrid nanofluid (Al₂O₃-SiO₂/water) over a slender, moving needle. The analysis includes joule heating, MHD, porous medium, thermal radiation and considering the effects of Soret and Dufour.

This grant-funded research utilized conversational agents (CAs), specifically Alexa Flash Briefings, to deliver supplemental audio content across educational settings, expanding the online learning environment of graduate students, residency teachers and mentors. The study aimed to determine the perceived usability of Flash Briefings and explore participant experiences related to Flash Briefings.

To explore Flash Briefing usability and participant perceptions, a review of relevant literature and researcher experience feedback was conducted. Additionally, graduate student feedback was sought via a modified Children’s Usage Rating Profile (CURP) Assessment survey, which also included questions related to listening habits and provided space for participants to share open-ended qualitative feedback. Data were analyzed for themes and descriptive statistics were calculated.

Findings suggest an overall positive perception of the use of Flash Briefings. A mix of positive experiences and challenges are identified based on user population. The study provides valuable insights for refining the utilization of Flash Briefings in higher education settings.

Variable levels of participation across a small sample size minimizes the generalizability of the results and fails to explore perceptions of student teachers and mentors.

The study offers an initial indication of benefits and challenges found in the implementation of an innovative technological intervention.

There is a continued need and demand for extending online instructional accessibility and communication across broad geographic areas. This study considers a unique approach and provides a step toward closing this gap by analyzing the effectiveness this content modality offers in higher education.

This paper aims to explore the opinions of business owners in an industrial area of Abu Dhabi that could be potentially turned into an art tourism destination.

By mobilizing the concept of “gentrification aesthetics,” the authors use a recall technique to explore support toward art from business owners, regression analyses to understand how the type and content of art predicts gentrification support and chi-square to research the differences between respondents who support the area to become a creative place and those who do not.

A model that explains the connection between gentrification aesthetics and art tourism is presented.

The authors’ proposed model results from testing the possibilities for expanding art tourism specifically and may not apply to other types of tourism. Future research is needed to understand whether and how the model can be applied to other forms of tourist consumption.

The current research presents a case study on how tourism can be strategically expanded into more rural places in a city.

The authors found significant differences between respondents who would like to see Mussafah becoming a creative place in five years and those who believe Mussafah needs to be(come) something else.

While work on tourism gentrification has been conducted, the nexus between gentrification aesthetics and art tourism cannot be found. Their relation can help to expend (art) tourism from busy cultural attractions to industrial areas. The present research fills this gap.

This paper aims at the analytical formulation of the electromagnetic features of flux switching permanent magnet (PM) machines with emphasis on the PM air gap flux density and armature magnetic reaction.

The PM air gap flux density is formulated considering three different analytical models. These differ by the incorporation of the air gap magnetic saliency level from the stator side. In addition, the armature magnetic reaction is investigated based on a simplified magnetic reluctance circuit that considers the flux switching permanent magnet machines magnetic circuit geometry specification. Then, the no- and on-load torque is predicted based on the two air gap flux densities.

It has been found that the PM air gap flux density considering the stator saliencies with trapezoidal magnetomotive force waveform presents the highest accuracy. Despite the simplicity of the magnetic equivalent circuit-based approach, the predicted air gap armature magnetic reaction is in good agreement with the finite element analysis (FEA) one. These lead to the analytical predictions of the no- and on-load torque which is characterized by an acceptable accuracy.

This work should be extended to experimental validation of the FEA results regarding the torque production generation.

The paper proposes an improved design-oriented analytical approach with emphasis on the PM air gap flux density and the armature magnetic reaction of flux switching PM machines.

This study aims to analyze the export competitiveness of Bangladesh's apparel industry by identifying the specific product categories that help sustain its export comparative advantage.

Compound annual growth rate (CAGR) and market share (MS) are calculated between 2011 and 2020 at the two- and four-digit level apparel product categories within the harmonized system (HS) to analyze the industry’s growth and export dominance. Trade competitiveness (TC) at the four-digit level, revealed comparative advantage (RCA) and normalized revealed comparative advantage (NRCA) at the two-, four- and six-digit-level apparel product categories are computed for the same 10-year period to investigate the industry’s export competitiveness. Major export destinations of the top 5 exporting product categories are identified to understand the factors facilitating the industry’s growth. A non-parametric Spearman rank correlation analysis evaluated the association between the RCA and NRCA indices.

Among the 34 product categories at the four-digit level, 29 consistently demonstrated an export comparative advantage, as did 34 out of 217 six-digit level sub-categories. In contrast, 12 sub-categories at the six-digit level consistently exhibited a comparative disadvantage in Bangladesh's export competitiveness. Furthermore, the TC measure identified 28 categories at the four-digit level with a robust comparative advantage. 30 categories displayed a positive CAGR, and Bangladesh asserted significant market dominance over 26 product categories at the four-digit level.

This study's implications are significant for various stakeholders in Bangladesh and other apparel-exporting industries, encompassing government entities, industry officials, policymakers, investors, researchers and students. Nevertheless, limitations arise from the study's reliance on RCA and NRCA as competitiveness indicators, particularly its adoption of a macro-level approach for measurement without exploring a micro-level perspective. This constitutes a notable constraint in the study's analytical framework.

This study contributed novelty and enrichment to the existing academic literature by identifying distinct apparel product categories that contribute to the industry's growth.

Prior research and theory have shown that transformational leadership can be developed through leader development programs (LDPs). To explain how this happens, research suggests a strong connection between an individual’s leader self-concept and their leadership behavior that can be manipulated through LDPs. The purpose of this article is to delve deeper into this phenomenon to understand how development occurs and to better understand how an LDP can improve leadership behaviors by influencing one’s self-concept and ultimately reduce the training transfer gap. As a broader goal, this article contributes to the existing literature on the value proposition of investing in LDPs.

We conducted an explanatory sequential design mixed-methods study to measure the development of participants and the impact of the program. The quantitative phase of the study used self-report surveys to measure the LDP’s impact on participants’ transformational leader behavior (TLB) and concept of themselves regarding leadership, their leader self-views (LSVs). The study also measured the relationship between LSVs and later enactment of leadership behaviors as the second hypothesis. The subsequent qualitative study was designed to understand the mechanisms that might explain the quantitative results.

The study’s empirical findings indicate a positive relationship between LSVs (efficacy, self-awareness and identity) and distal leader development outcomes (TBLs). The study’s findings also provide support for the claim that LDPs convert knowledge and skills into TLB, expanding an individual’s capacity to be effective in leadership roles and processes (Day & Dragoni, 2015). Qualitative results also show LDPs improve leader behavior by influencing their self-efficacy via providing tools and knowledge as well as building experimental mindset.

By showing LDPs' long term impacts, this paper demonstrates why short-term leadership development programs are worth investing.

Visual sustainability has gained significant relevance for both firms and consumers. While the importance of perceived sustainability in package design is well researched, there is a research gap regarding divergent responses of consumers to perceived visual sustainability. This research aims to close this gap by providing deeper insights into the underlying mechanisms of perceived visual sustainability in package design. As a boundary condition, this work also investigates gender differences in response to a design’s visual sustainability.

To explore the mediating influences of cognitive (i.e. a product’s gentleness and power) versus emotional (i.e. moral satisfaction) attributes as well as the role of consumer gender in the perceived visual sustainability–purchase intention relationship, the authors extend previous research through three experiments.

Study 1 provides initial evidence supporting the main effect of perceived visual sustainability on purchase intention. Findings of Study 2 show that moral satisfaction serves as a significant driver of purchase intention for females, while power-related attributes are more influential for males. Study 3 provides additional evidence for the main effect, the interaction effect with consumer gender and underlying mechanisms.

These findings have important implications for marketers and designers aiming to design packages that appeal to different consumer groups based on their (gender-specific) values regarding visual sustainability.

This work extends the literature on green behavior by highlighting the importance of perceived visual sustainability as a factor that influences purchase intention and the role of cognitive versus affective mechanisms in shaping consumer responses to design sustainability.

The purpose of this article is to garner insight into positive introversion, meaning experiences of introverted behaviour that may be perceived as positive and perform positive functions in one’s life. The subject is Mark Weeks, whose primary research has been in cultural studies and philosophy, particularly focusing on laughter and humour, during a career spent mostly at Nagoya University in Japan.

This case study uses positive autoethnography, a methodology that was co-conceived by Weeks. It includes a 10-question interview.

The authors learn how Weeks has positively embraced his introversion to negotiate challenges in his life, fostering resilience, gratitude and joyful experience. In the process, Weeks foregrounds the importance of solitary laughter and humour in his existential journey.

Introversion is often depicted negatively in the literature. Yet, much introversion is and can be developed as, positive.

The narrative shared here is one of trials, exploration and discovery, offering practical insight for introverts and those interested in understanding introverted behaviour in general.

Positively embracing aspects of introversion can be an important step for introverts in finding a healthy and enjoyable balance between the social and the solitary. Indeed, the same may apply to extraverts who fear being alone. Greater social recognition of valuable experiences within solitude could help to produce more tolerant and adaptable societies.

To the best of the authors’ knowledge, this is an original article, narrated by a contributor to the development of positive autoethnography. It focuses on areas of personal experience that are often marginalized and poorly understood, including positive potentials of introversion and of solitary laughter.

Based on the reception of the principle of self-organization, the core of Heinz von Foerster's operational theories, I hypothesize how Heinz von Foerster's theory can be an orientation model for the epistemological problem of complexity. I have chosen this study to demonstrate complexity as an epistemological problem. This is because the question of how order arises - the core problem of complexity - is an epistemological question for which Heinz von Foerster developed an epistemology of self-organization. I do not present new research because HvF already had the complex organization of systems in mind. Rather, I build a critical approach to complexity on the research and work on operational epistemology in HvF.

This article aims to provide an orientation for a philosophical and epistemological understanding of complexity through a reading of Heinz von Foerster's operational theory. The article attempts to establish complexity as an epistemological phenomenon through the following method: (1) a conceptual description of the science of complexity based on the turn to thermodynamic time, (2) a genealogy of complexity going back to the systemic method, and (3) Heinz von Foerster's cybernetic approach to self-organization.

Based on the reception of the principle of self-organization, the core of Heinz von Foerster's operational theories, the conclusion is drawn that complexity as a description is based on language games.

The results present complexity not as an object of science, but as a description that stands for the understanding of complex description.

The hypothesis that complexity is a question of description or observation, i.e. of description for what language serves, has enormous social implications, in that the description of complexes and the recognition of their orders (patterns) cannot be left to algorithmic governmentality, but must be carried out by a social agency.

HvF's operational epistemology can serve as an epistemological model for critical complexity theory.

This study aims to stimulate scholarly attention and practical application pertaining to individuals recognized as “Docs.” Through conducting a comprehensive analysis and acquiring a profound understanding of its many connotations, the objective is to shift attitudes and approaches concerning those who are seen to possess knowledge and value within society.

For this study, culturally relevant pedagogies were used as theoretical frameworks in addition to Sankofa and concept explication being used as methodologies.

The authors identified three themes: (1) honorary cultural practice-community nomination of “professahs” and “docs,” (2) (Black) robinhoods – cultural signifiers of distinction and relatability and (3) docs as catalysts – elevating community via consciousness, trust and mentorship as significant understandings of this distinction.

The study emphasizes the importance of “Docs” in both academic and social contexts. The role of “Docs” serves to alleviate potential conflicts of being a Black intellectual. This study further reveals the ways in which Docs align with, promote or possibly undermine established frameworks of thought. Finally, this study provides institutions with opportunities to consider strategies for the utilization, recognition and integration of individuals who are frequently overlooked or undervalued.