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The lubricating fluid stored in the porous matrix will spontaneously exude to supplement the lubricating film in the damaged area, thus ensuring the long-term self-lubricating function of the porous surface. To reveal the repair mechanism of oil film, it is necessary to understand the flow characteristics of oil in micropores. The purpose of this study guides the design of micropore structure to realize the rapid exudation of oil to the porous surface and the rapid repair of the lubricating film.

In this paper, cylindrical orifice, convergent orifice and divergent orifice were studied. The numerical model of lubricating oil exudation in micropores was established. The distribution characteristics of oil pressure, velocity and three-phase contact line in the process of oil exudation were investigated. The effects of different orifice shapes and orifice structure parameters on the pinning and spreading characteristics of oil droplet were analyzed. Then the internal mechanisms of oil droplet formation and spread on the orifice surface were summarized.

The results show that during the process of oil exudation, the three-phase contact line of the oil drop is pinned once at the edge of the cylindrical and convergent orifice. Compared with the three orifice structures, the inlet pressure of the oil drop is low, and the oil velocity at the pinning point is stable in the divergent orifice. Resulting in favorable oil exudation. It is easier for oil droplet to depin by appropriately reducing the wall wetting angle, increasing the aperture or controlling the wall inclination angle. Ensure the self-healing and long-lasting lubrication film of porous oil-bearing surfaces.

The effect of pore structure on the flow behavior of lubricating fluid has always been concerned. But the mechanism by which different orifice shape affect the pinning behavior of oil droplets is not yet clear, which is crucial for understanding the self-healing mechanism of oil films on porous surfaces. It is meaningful to analyze the mechanism of oil exudation and spreading on the porous surface of oil in the special orifice, to optimize the design of the orifice structure.

Orifice shape has influence on internal flow field parameters. There is no report on the influence of orifice shape on the film formation process of oil seepage and diffusion from pores. The effects of different orifice shapes and orifice structure parameters on the characteristics of oil droplet pinning and diffusion were studied.

The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-04-2024-0118/

This introductory chapter begins by outlining the background of this book: how the concept of excessive teacher entitlement took shape and was progressively enriched through my collaborative work with Cheryl J. Craig. Our ongoing informal dialogues gave rise to an invisible college where we co-created new meanings to deepen the understanding of professional inertia. We saw professional inertia as a manifestation of excessive teacher/faculty entitlement constantly adrift in a yin and yang relationship with their best-loved self. This insight came from challenging the narrow mainstream view of the notion of excessive entitlement as a purely volitional act of autonomous individuals which leads to blaming and pathologizing teachers/faculty. Instead, a Vygotskian cultural-historical perspective is proposed. This perspective facilitates a more complex historicized view of the phenomenon by directing attention to the historically and culturally mediated nature of excessive teacher/faculty entitlement and the means to alleviate it. The healing touch to excessive teacher/faculty entitlement repeatedly surfaces as humanizing pedagogy. This involves helping teachers/faculty develop empowered entitlement and work towards realizing their dreams, their best-loved self. Finally, this introductory chapter provides a brief overview of the 15 chapters that follow. They explore the notion of excessive teacher/faculty entitlement in diverse sociocultural contexts and examine promising approaches to address this problem from different theoretical and methodological angles. You are invited to join us in this rich journey of inquiry and transformation.

Drawing on interviews with two types of essential workers – wound clinicians and care workers – the chapter examines stigma management in dirty care work through the lens of emotion management. The study combines two dimensions of dirty work: physical taint in relation to bodywork and social taint linked to working in close proximity to socially stigmatized clients. Hence, stigma management extends to dealing with the physically and socially dirty features of essential care work. In addition, the authors’ assessment of social stigma includes how essential care workers also sought to alleviate the social stigma encountered by their clients. In so doing, the authors extend the literature on dirty work to identify how emotion management skills are central to the stigma management strategies of the essential care workers in this study. The authors demonstrate how both groups deal with their stigma by emphasizing the emotion management skills in ‘doing’ dirty work and in the ‘purpose’ of this work, which includes acknowledging how the authors attempt to address the social taint encountered by their clients. Additionally, by comparing two occupations with different contexts and conditions of work, the authors show how complex emotion management skills are gendered in care work to expand the understanding of gender and stigma management. Furthermore, these emotion management skills emanate from the deep relational work with clients rather than through occupational communities. The authors argue that by focussing on emotion management, the hidden skills of dirty work in gendered care work are illuminated and contribute to contemporary debates about whether stigma can be overcome.

As Ratnam makes clear, a cultural–historical perspective on teacher/faculty excessive entitlement is indispensable if we are to use this concept to work with, rather than undermine, education practitioners. In this chapter, a networked relational model of activity is proposed as a tool for understanding excessive entitlement from a cultural–historical activity theory (CHAT) perspective, so that the transformative potential of both entitlement and the modeling of it may be harnessed. The networked relational model, which represents CHAT activity systems as a hand-draw or painted network of relationships between actors and artifacts, allows its creators, in their capacity as researchers or academics, to use it as an imaginative artifact in the Wartofskian sense. That is, by representing activity systems of academic performance as networks of interacting entities, the emergence of excessive entitlement can be traced to, and perhaps mitigated through the relationships that they represent. In this regard, the why, what, and how artifacts proposed by Engeström are taken up as useful means for enhancing the functioning of the networked relational model not just as a tool for analyses of entitlement but also a means for envisioning alternative countercultures into being.

Like most in education, I rarely take the opportunity to question and slow down enough to reflect on ideas and intentionally notice the subtle shifts in my thoughts. Life is hurried, and finding quiet reflective moments is difficult but not impossible. Encouraged to confront experiences of excessive entitlement in relation to the social, cultural, and political world, I learned that as with much in life there is a give and take, a negotiation of sorts, which if allowed leads to understanding. The interconnectedness of practitioners' varying experiences with administrators and educational policies raises the question of who affects whom and causes me to reflect on my research questions: 1. What is my relationship with excessive teacher entitlement? 2. Am I implicit in its production? If so, how and why?

In this chapter, I reflect on my cognitive and emotional relationship with excessive entitlement as an embodied experience through autoethnography methodology and phenomenology. By troubling or worrying the notion of excessive entitlement, I confront my beliefs through conversations with student teachers and veteran teachers, examining the interconnectedness of how people are implicit in its production. As a researcher and participant, the theoretical underpinnings of phenomenology allow me to orient myself to my lived experiences as an art teacher, teacher leader, and faculty member and leader at a private university. Pulling from journal entries, emails, written “ponderings,” noted conversations, and memory, data support the notion that excessive entitlement occurs at all levels in education, and awareness is the first step toward understanding.

The paper follows Jason Cope's (2011) vision of a holistic perspective on the failure-based learning process. By analyzing the research since Cope's first attempt, which is often fragmentary in nature, and providing novel empirical insights, the paper aims to draw a new comprehensive picture of all five phases of entrepreneurial learning and their interplay.

The study features an interpretative phenomenological analysis of in-depth interviews with 18 failed entrepreneurs. Findings are presented and discussed in line with experiential learning theory and Cope's conceptual framework of five interrelated learning timeframes spanning from the descent into failure until re-emergence.

The study reveals different patterns of how entrepreneurs experience failure, ranging from abrupt to gradual descent paths, different management and coping behaviors, and varying learning effects depending on the new professional setting (entrepreneurial vs non-entrepreneurial). Analyzing the entrepreneurs' experiences throughout the process shows different paths and connections between individual phases. Findings indicate that the learning timeframes may overlap, appear in different orders, loop, or (partly) stay absent, indicating that the individual learning process is even more dynamic and heterogeneous than hitherto known.

The paper contributes to the field of entrepreneurial learning from failure, advancing Cope's seminal work on the learning process and -contents by providing novel empirical insights and discussing them in the light of recent scientific findings. Since entrepreneurial learning from failure is a complex and dynamic process, using a holistic lens in the analysis contributes to a better understanding of this phenomenon as an integrated whole.

In this study, I use currere to examine excessive entitlement in my own high school education. By “excessive entitlement,” I emphasize teachers' actions and systemic conditions related to an excessive educational mindset justifying (and manifesting) self-infallibility. Teachers displaying excessive entitlement might take for granted, for example, the correctness of their actions, closing self-awareness, and more equitable relations with others (especially students). On a structural level, it includes, for example, societal norms, school policies, educational traditions, and often laws. Specifically, I present findings examining three levels of curriculum – the formal or explicit, the implicit or hidden, and the null or present/absent. I offer my own story as a case study of how schools and teachers may silence and erase student identity and culture as well as how more inclusive and dialogic teaching approaches (and methods of inquiry) can counteract and offer alternatives to such oppressive forces. My framework includes professional ethics, moral ethics, and social justice ethics. Looking back at my history as a gay high school student, I discovered that my school's explicit curriculum provided teachers with a safe haven for bigotry and hostility toward LGBTQ students (as well as female students and students of color), and its hidden curriculum projected messages that privileged such a curriculum (and denigrated epistemologies more on the margin). It was only in the null curriculum that I began to experience a sense of liberation and inclusion and an awareness of the multiplicity of epistemology and ontology.