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This paper aims to investigate the flow of two-layered non-Newtonian fluids with different viscosities in an axisymmetric elastic tube.

A mathematical model was considered for this study to describe the flow characteristics of two-layered non- Newtonian Jeffrey fluids in an elastic tube. Because Jeffrey fluid model is a better model for the description of physiological fluid motion. Further, this model is a significant generalization of Newtonian fluid model. Analytical expressions for flux, stream functions, velocities and interface velocity have been derived in terms of elastic parameters, inlet, outlet and external pressures. The effects of various pertinent parameters on the flow behavior have been studied.

The volumetric flow rate was calculated by different models of Mazumdar (1992) and Rubinow and Keller (1972); from this it was found that the flux of Jeffrey fluid is more in the case of Rubinow and Keller model than Mazumdar. A comparative study is made between single-fluid and two-fluid models of Jeffrey fluid flows and it was observed that more flux and higher velocities were observed in the case of two-fluid model rather than single-fluid model. Furthermore, when both the Jeffrey parameter tends to zero and ratios of viscosities and radii are unity, the results in this study agree with those of Rubinow and Keller (1972).

To describe the fluid flow in an elastic tube with two-layered systems, the models and solutions developed here are very important. These results will be highly suitable in analyzing the rheological characteristics of blood flow in a small blood vessel because of their elastic nature.

This paper aims to present a study on stability analysis of Jeffrey fluids in the presence of emergent chemical gradients within microbial systems of anisotropic porous media.

This study uses an effective method that combines non-dimensionalization, normal mode analysis and linear stability analysis to examine the stability of Jeffrey fluids in the presence of emergent chemical gradients inside microbial systems in anisotropic porous media. The study focuses on determining critical values and understanding how temperature gradients, concentration gradients and chemical reactions influence the onset of bioconvection patterns. Mathematical transformations and analytical approaches are used to investigate the system’s complicated dynamics and the interaction of numerous characteristics that influence stability.

The analysis is performed using the Jeffrey-Darcy type and Boussinesq estimation. The process involves using non-dimensionalization, using the normal mode approach and conducting linear stability analysis to convert the field equations into ordinary differential equations. The conventional thermal Rayleigh Darcy number RDa,c is derived as a comprehensive function of various parameters, and it remains unaffected by the bio convection Lewis number Łe. Indeed, elevating the values of ζ and γ′ in the interval of 0 to 1 has been noted to expedite the formation of bioconvection patterns while concurrently expanding the dimensions of convective cells. The purpose of this investigation is to learn how the temperature gradient affects the concentration gradient and, in turn, the stability and initiation of bioconvection by taking the Soret effect into the equation. The results provide insightful understandings of the intricate dynamics of fluid systems affected by chemical and biological elements, providing possibilities for possible industrial and biological process applications. The findings illustrate that augmenting both microbe concentration and the bioconvection Péclet number results in an unstable system. In this study, the experimental Rayleigh number RDa,c was determined to be 4π2at the critical wave number ( δcˇ) of π.

The study’s novelty originated from its investigation of a novel and complicated system incorporating Jeffrey fluids, emergent chemical gradients and anisotropic porous media, as well as the use of mathematical and analytical approaches to explore the system’s stability and dynamics.

This chapter begins with a brief history of the ways in which alcohol has been ingrained in American culture since the arrival of European settlers and their enslavement of African people. The chapter then addresses important aspects of alcohol and other drug use among college students. Because of the popularity of alcohol and cannabis among college students, they occupy the primary focus of the chapter, although other psychoactive drugs are briefly discussed as well. The chapter draws from data collected by the Healthy Minds Study, the Center for Collegiate Mental Health (CCMH) and the American College Health Association (ACHA) in describing the prevalence of alcohol and cannabis use among college students, as well as trends in the use of both substances. The reasons college students drink and use cannabis are explored, as are the many consequences, including academic, legal, physical and interpersonal. The chapter examines a number of prevention strategies that colleges have used to minimize the negative consequences of substance use, including large-scale scare tactics, educational efforts and norming campaigns, as well as individually tailored programs; the effectiveness of each is reviewed.

This chapter differentiates stress from generalized anxiety, discussing the nature and prevalence of each among college students. The chapter then delves into generalized anxiety in detail, covering instruments that measure generalized anxiety, cultural considerations associated with generalized anxiety and the causes, consequences, prevention and treatment of generalized anxiety among college students. The next section of the chapter focuses on social anxiety among college students, similarly addressing its defining characteristics, prevalence, cultural considerations, causes, consequences, prevention and treatment. The final section of the chapter follows a similar structure in discussing posttraumatic stress disorder (PTSD) among college students. Throughout the chapter, attention is devoted to neurotransmitters and brain structures that are involved in anxiety and its treatment through antianxiety medications. Case examples are used to help bring theoretical concepts and research findings to life.

This chapter addresses one of the most common and long-standing problems among college students, namely depression, as well as a potential consequence of depression, suicide. A formal definition of depression is presented, and symptoms of depression are discussed. Notably, clinical depression is differentiated from “feeling down” or having “the blues.” Common measures of depression for college students are described, and the current prevalence of depression among college students is explored, along with data pertaining to trends and trajectories. Particular attention is devoted to differences in rates and severity of depression among students of various ethnicities, gender identities, disabilities and sexual orientations. Next, the chapter covers various theories about and studies on the causes and consequences of depression, as well as preventive and remedial efforts that students can engage in to minimize the adverse effects of depression. The chapter concludes with a focus on college student suicide, including its prevalence, predictors of suicidal thoughts and behaviors and prevention and treatment of college student suicide.

Romanian women migrant entrepreneurs (RWMEs) are amongst the largest EU migrant communities in the UK and make significant socioeconomic contributions to both their host and origin nations, but academic research and policy discussions have ignored them. Intersectionality raises complex contextual issues that require comprehensive examination and inclusive policies and programmes. This study is aimed at exploring how Romanian women migrant entrepreneurs experience their transnational intersectional journeys of belonging, as they create, negotiate and enact their intersectional identities of the country of origin, gender and being entrepreneurs in the UK and Romania.

This Interpretative Phenomenological Analysis (IPA) draws on draws upon Crenshaw's (1991) intersectional and Social Identity theories (Tajfel and Turner, 1979) to investigate how nine interviewed RWMEs have experienced their transnational journeys of acculturative belonging in the UK and Romania.

The study findings show how RWMEs undo and negotiate their intersecting identities to adhere to socio-cultural standards in both their host and native nations. In the UK, they feel empowered as women entrepreneurs, but in patriarchal Romania, their entrepreneurial identity is revoked, contradicting the prescribed socio-cultural roles.

This study responds to the call regarding inequalities in entrepreneurship opportunities (Vershinina et al., 2022). By focussing on the understudied community of RWMEs and exploring new intersectional and transnational contextual insights, it contributes to the literature and practice of migrant entrepreneurship. These empirical findings are essential for the development of evidence-based, disaggregated entrepreneurship programmes and policies.

This study responds to the call regarding inequalities in entrepreneurship opportunities (Vershinina et al., 2022). By focussing on the understudied community of RWMEs and exploring new intersectional and transnational contextual insights, it contributes to the literature and practice of migrant entrepreneurship. These empirical findings are essential for the development of evidence-based, disaggregated entrepreneurship programmes and policies.

This paper aims to consider the legitimacy challenges faced by hybrid organizations, examining the narrative strategies hybrids use in responding to these challenges and offering a framework for managers to consider in their choice of narratives.

A narrative analysis of texts addressing the legitimacy of the business models used by four hybrid organizations is conducted.

The results of the analysis suggest that the nature of conflicting stakeholder demands – centered on goals or means – is an integral factor influencing hybrids’ choice of narrative strategies to emphasize distinctiveness or conformity.

This paper adds to extant research examining the challenges hybrid organizations face and emphasizes that the choice of narrative strategies is an important factor hybrids must consider when managing legitimacy. Generalizability is a notable limitation of the case approach; the authors suggest areas for future research to address this limitation.

The research offers a practical framework for hybrids’ leaders, as they manage legitimacy, choosing to emphasize distinctiveness or conformity in the face of conflicts regarding goals or means.

By studying the legitimacy challenges faced by hybrid organizations, this study can form a more complete view of legitimation, encompassing different types of enterprises offering distinct value propositions.

The number of students from culturally and linguistically diverse (CLD) backgrounds continue to increase in classrooms across the United States. These students have complex needs as they experience more barriers to success when compared to their peers. These barriers are further compounded when CLD students are also identified as having disabilities. To address the barriers and meet the needs of CLD students with disabilities, teaching professionals should move away from the traditional American educational values of individual freedom and self-reliance, equal opportunity and competition, and material wealth and hard work. Conversely, schools and teaching professionals should incorporate the modern values of social justice, diversity, equity, inclusion, accessibility, and belonging when working with students from CLD backgrounds who have disabilities. This chapter presents these values and provides recommendations for teaching professionals and schools.