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The transpiration has been recognized as one of the most effective thermal protection methods for future hypersonic vehicles. To improve efficiency and safety, it is urgent to optimize the design of the transpiration system for heat and drag reduction. The purpose of this paper is to investigate the effects of transpiration on heat and drag reduction.

A chemical nonequilibrium flow model with the transpiration is established by using Navier–Stokes equations, the shear-stress transport turbulence model, thermodynamic properties and the Gupta chemical kinetics model. The solver programmed for this model is verified by comparing with experimental results in the literature. Effects of air injection on the flow field, the aerodynamic resistance and the surface heat flux are calculated with the hypersonic flow past a blunt body. Furthermore, a modified blocking coefficient formula is proposed.

Numerical results show that the transpiration can reduce the aerodynamic resistance and the surface heat flux observably and increase the shock wave standoff distance slightly. It is also manifested that the modified formula is in better agreement with the wind tunnel test results than the original formula.

The modified formula can expand the application range of the engineering method for the blocking coefficient. This study will be beneficial to carry out the optimal design of the transpiration system.

Black women faculty are experiencing multiple marginalities within their intersectional identities (Thomas & Hollenshead, 2001). The overwhelming obstacles that they face in academia regarding racism, lack of mentorship, and its impact on productivity are well documented (Allen, Huggins-Hoyt, Holosko, & Briggs, 2018). However, through a raced and gendered intersection centering Black women, these workplace obstacles can transform into something far more insidious (Young & Hines, 2018). Black women academics do not enter academic environments that have been liberated from racism, sexism, or misogynoir; instead, the environment itself is a microcosm of the world in which they reside (Thompson, 2020). Black women academics are double minorities and face issues such as isolation from collegial networks; lack of institutional/departmental support; forced positionality into the role of mentorship for students of color; and increased visibility and bodily presentation concerns (Allen et al., 2018; Pittman, 2010). Further still, the workplace dynamics and needs of students of color can collide within the work of Black women academics, increasing the prevalence of othermothering and a racialized and gendered racial uplift (Griffin, 2013; Mawhinney, 2011). Though previous studies have demonstrated positive effects of university diversification, women, ethnic minorities, sexual minorities, and religious minorities continue to face antagonistic environments (Cunningham, 2009; Hughes & Howard-Hamilton, 2003). Rooted within Black Feminist Thought and Critical Race Theory, this chapter aims to highlight the intersectional identities of Black women academics and identifies mechanisms to address how Black women are experiencing multiple marginalities within their intersectional identities (Hirshfield & Joseph, 2012).

Racial stigma and racial criminalization have been centralizing pillars of the construction of Blackness in the United States. Taking such systemic injustice and racism as a given, then question then becomes how these macro-level arrangements are reflected in micro-level processes. This work uses radical interactionism and stigma theory to explore the potential implications for racialized identity construction and the development of “criminalized subjectivity” among Black undergraduate students at a predominately white university in the Midwest. I use semistructured interviews to explore the implications of racial stigma and criminalization on micro-level identity construction and how understandings of these issues can change across space and over the course of one's life. Findings demonstrate that Black university students are keenly aware of this particular stigma and its consequences in increasingly complex ways from the time they are school-aged children. They were aware of this stigma as a social fact but did not internalize it as a true reflection of themselves; said internalization was thwarted through strong self-concept and racial socialization. This increasingly complex awareness is also informed by an intersectional lens for some interviewees. I argue not only that the concept of stigma must be explicitly placed within these larger systems but also that understanding and identity-building are both rooted in ever-evolving processes of interaction and meaning-making. This research contributes to scholarship that applies a critical lens to Goffmanian stigma rooted in Black sociology and criminology and from the perspectives of the stigmatized themselves.

Based on literature providing evidence that Afrocentric hairstyles (e.g. afros, braids, dreadlocks) of Black women working in professional settings are often associated with negative stereotypes and biases regarding competency and professionalism, this chapter examines the extent to which these biases may be influencing the hairstyle choices of Black women employed in higher education. While academic workplaces tend to be more flexible and informal than non-academic settings, we found many Black women in higher education are, nonetheless, choosing to wear Eurocentric hairstyles. However, choice of hairstyle was influenced by academic discipline, type of institution and level in the university hierarchy.

The authors examine the effect of greenhouse gas (ghg) assurance on cost of debt, and the effect of board gender diversity on cost of debt, for an international sample of listed companies.

Utilizing firm-level data and a quantile regression approach, this study examines the effects of greenhouse gas assurance and board diversity on cost of debt by employing an international sample of firms during 2015–2021.

The authors find that in firms with a relatively low cost of debt the external assurance of greenhouse gas emissions and gender diversity could significantly contribute to a reduction of cost of debt. Furthermore, other measures of board diversity that are linked with independent directors and skilled directors seem to contribute to an increase of firms' cost of debt in the lower end of distribution. Drawing from the agency theory, the authors showcase the fact that ghg assurance reduces information asymmetry and therefore agency costs such as borrowing costs and signals to the stakeholders a long-term commitment to excellence.

This study is the first that provides insights on the relationship between ghg assurance, board diversity and cost of debt.

Drawing upon resource-based view (RBV) and attribution theoretical lenses, this chapter provides a paradigm for examining the interplay among environmental investment towards green innovation, environmental disclosure as well as firm performance using the structural equation modelling (SEM) methodology. This chapter demonstrate a growing environmental awareness among stakeholders of the relevance of environmental performance to share value. It is also suggested that the mediating power of environmental disclosure between environmental investment and firm value as well as incremental goodwill is crucial. The findings of this chapter provide critical implications for several stakeholders that if environmental performance is hypothesised to affect the firm's value, companies may take proactive measures to avert potential environmental-related violations. Besides, investors may trade based on the evidence as to how firm value and its goodwill from acquisition will be affected by news of its environmental performance.

The sources and platforms utilized for environmental communication have been significantly expanded by the emergence of social media. The validity, form, and content of environmental communication processes are particularly radical departures from conventional media, making personal green blogs important of study as areas of everyday culture politics where people make understanding of environmental challenges. There is currently a lack of research on how social media might encourage green behaviours. This research reveals the impact of social media use and green blogging on green purchasing behaviour, which is supported by the social learning theory. Present study shows that social media use and green blogging have a substantial positive connection, drawing on a sample of 580 respondents from Pakistan examined using structural equation modelling. Both notions have a considerable impact on consumers' intentions to make green purchases, and social media trust plays a moderating role in this relationship. Furthermore, social media trust considerably modifies the connections between green blogging and social media use that is related to green behaviour. The current study is novel and offers important information to understand how social media might promote eco-friendly habits and behaviour.

The main purpose of this study is to evaluate whether the COVID-19 pandemic has stimulated earnings management among publicly traded companies in Brazil and the USA.

The authors analyzed the above-mentioned effects based on 22,244 observations of Brazilian companies and 139,856 observations of American companies from 1998 to 2020. The proxy used to detect earnings management based on discretionary accruals (DAC) was obtained by using the Modified Jones Model (MJM) (Dechow et al., 1995), with adjustments suggested by Kothari et al. (2005). In accordance with previous studies (e.g. Brown et al., 2015; Enomoto et al., 2015; Galdi et al., 2020; Huang and Sun, 2017; Roychowdhury, 2006), the authors also employed a second proxy to detect earnings management through real activities associated with unusual losses for fixed assets (property, plant and equipment (PPE)).

The study’s findings indicate that the discretionary accruals of Brazilian companies varied in a more accentuated manner during the COVID-19 pandemic, making it possible to deduce that a recent history of economic depression may entail greater incentives for earnings management in an emerging economy. In addition, the authors verified that the effects of the current crisis on earnings management proxies denote a signal that is distinct from previous economic crises, which may be interpreted as an attempt to postpone the effects of the pandemic on financial statements, especially those of the Brazilian capital markets.

Unlike previous crises, this pandemic has led to direct restrictions on a wide variety of economic segments rather than indirect contagion due to anomalies in the financial markets, making it a phenomenon with the characteristics of a quasi-natural experiment for studies related to the quality of accounting information. Considering that both Brazil and the USA provide an opportune economic contrast, given their discrepancies in terms of economic growth over the past two decades, the researchers believe that there is an unusual opportunity to understand how earnings management can be an incentive for managers in environments where crises arose from natural causes.

Gender equality is a part of the United Nation’s championed sustainable development goal which reflects the global policy priority of bringing women to the table as decision-makers. The year 2021 has seen the highest record of women serving as heads of state and/or government and political representation at national parliaments. However, there seems to be a greater challenge for women to achieve equal political representation as the COVID-19 pandemic that hit the world in 2020 has slowed down women’s political progress at the global level. Until April 2021, COVID-19 has resulted in more than six million casualties and many countries have resorted to taking strict measures to contain the widespread of the virus especially prior to the administration of the vaccines. The strict measures taken by governments worldwide include border closures, extensive contact tracing, physical distancing, and restriction of movements. The pandemic is proven to be precarious not only to public health but also to democracy around the world as governments are given a free pass to silence protests, clamp down on opposition and critics as well as greater control over public movements by using COVID-19 management as a justification. This also has halted the progress made by women’s movements and political activists in championing women’s political representation. Malaysia is one of the countries that imposed long and strict COVID-19-related security and safety measures. This chapter seeks to analyse how COVID-19 is utilized by political institutions specifically the state to embrace or resist changes. COVID-19 is a possible critical juncture that provides opportunities for the state and political parties to renegotiate their structures, values, and positions in society to accommodate women. To explore the gendered responses of political institutions to COVID-19, this chapter identifies two areas to be examined within the Malaysian context (1) the gendered effects of the changes in state structures due to political instability during COVID-19, and (2) government policies that address women during the peak of the COVID-19 period. The results of this study will provide useful insights into the important factors that influence the utilisation of critical junctures either to break a new path or maintain the existing path dependency on political institutions’ policymaking related to gender issues.