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The purpose of this study is to investigate the transport phenomena of smoke flow in a semi-open vertical shaft.

The large eddy simulation (LES) method was used to model the movement of fire-induced thermal flow in a full-scale vertical shaft. With this model, different fire locations and heat release rates (HRRs) were considered simultaneously.

It was determined that the burning intensity of the fire is enhanced when the fire attaches to the sidewall, resulting in a larger continuous flame region in the compartment and higher temperatures of the spill plume in the shaft compared to a center fire. In the initial stage of the fire with a small HRR, the buoyancy-driven spill plumes incline toward the side of the shaft opposite the window. Meanwhile, the thermal plumes are also directed away from the center of the shaft by the entrained airflow, but the inclination diminishes as HRR increases. This is because a greater HRR produces higher temperatures, resulting in a stronger buoyancy to drive smoke movement evenly in the shaft. In addition, a dimensionless equation was proposed to predict the rise-time of the smoke plume front in the shaft.

The results need to be verified with experiments.

The results could be applied for design and assessment of semi-open shafts.

This study shows the transport phenomena of smoke flow in a vertical shaft with one open side.

Boards of directors often attempt to foster corporate entrepreneurship by replacing a firmʼs chief executive officer (CEO). Compelling theoretical arguments and anecdotal evidence suggest that when firm performance has suffered, a new CEO is best suited to lead the firmʼs creative endeavors. On the other hand, among firms that retain their existing CEO after a decline in performance, manipulating the CEOʼs compensation package is a common governance practice used by boards to encourage innovation. In these cases, some have argued that increasing the CEOʼs pay will encourage corporate entrepreneurship, because the CEO has been compensated for assuming additional risk. Counter to these propositions, this study develops theoretical arguments that a firmʼs existing CEO is better equipped to foster corporate entrepreneurship and that this probability increases when the CEOʼs cash compensation is decreased. Results from a sample of 100 single-product manufacturing firms suggest firms that retain their current CEO and decrease the CEOʼs cash compensation are most likely to engage in corporate entrepreneurship. Implications that this research has for corporate entrepreneurship, corporate governance, and firm performance are discussed.

Technology-facilitated violence and abuse is a truly global problem. As the diverse perspectives and experiences featured in this book have shown, the deep entanglement between technologies, inequality, marginalization, abuse, and violence require multi-faceted and collaborative responses that exist within and beyond the law. When this chapter was written, society was (and continues to be) facing an unprecedented challenge in COVID-19 – a global pandemic. At the same time, a renewed focus on racist police and civilian violence has occurred following the killings of George Floyd, Ahmaud Arbery, and Breonna Taylor in the United States. As we describe in this chapter, these two major moments are ongoing reminders of the profound social inequalities within our global communities, which are grounded in systemically discriminatory oppressions and their intersections. This chapter draws together some thoughts on technology-facilitated violence and abuse in an era of COVID-19 and antiracist protest. It explores these within the context of the book as a whole, highlighting the importance for improved understanding of, and responses to, technology-facilitated violence and abuse as part of a broader push for social justice.

The purpose of this paper is to examine whether the impact of persistent racial bias, discrimination and racial violence is facilitated by otherwise well-intentioned individuals who fail to act or intercede. Utilizing the aversive racism framework, the need to move beyond awareness raising to facilitate behavioral changes is discussed. Examining the unique lens provided by the aversive racism framework and existing research, the bystander effect provides important insights on recent acts of racial violence such as the murder of Mr. George Floyd. Some promise is shown by the work on effective bystander behavior training and highlights the need for shared responsibility in preventing the outcomes of racial violence and discrimination to create meaningful and long-lasting social change.

This paper uses literature based on the aversive racism framework together with the literature on the bystander effect to understand the factors, conditions and consequences for lack of intervention when the victim is African American. This paper also provides evidence and theory-based recommendations for strategies to change passive bystanders into active allies.

The use of the aversive racism framework provides a powerful lens to help explain the inconsistencies in the bystander effect based on the race of the victim. The implications for intervention models point to the need for behavioral and competency-based approaches that have been shown to provide meaningful change.

Several different approaches to address incidents of racial aggression and violence have been developed in the past. However, given the principles of aversive racism, a unique approach that considers the inconsistencies between self-perceptions and actions is needed. This sets a new agenda for future research and meaningful behavioral intervention programs that seek to equip bystanders to intercede in the future.

The need to address and provide effective strategies to reduce the incidence of racial aggression and violence have wide-ranging benefits for individuals, communities and society.

By connecting the aversive racism framework to the bystander effect, the need for different models for developing responsive and active bystanders can be more effectively outlined.