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Measurement of interfacial shear stress in gas–liquid two-phase stratified flow
Get PDFThis article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in (Fang, L., Ge, B., Li, Z., Sun, X., Han, B., Faraj, Y., & Zhao, N. (2023). Measurement of interfacial shear stress in gas–liquid two-phase stratified flow. Journal of Applied Physics, 134(16), article-number 164703) and may be found at (https://doi.org/10.1063/5.0168677).Gas–liquid two-phase stratified flow exists in many industrial processes. Although the flow pattern is simple, the interfacial shear prediction of stratified flow is still the focus of the study. The calculation of the shear stress at the gas–liquid interface is closely related to the measurement of the void fraction and pressure drop of the stratified flow. In this study, a new method for the calculation of interfacial shear stress of gas–liquid two-phase stratified flow is proposed. Differential pressure measurement and planar laser-induced fluorescence technology are combined to obtain important parameters for stratified flow under low-speed flow conditions (Ql = 0.10–0.25 m3/h, Qg = 0.35–1.00 m3/h). The interfacial shear stress is successfully calculated using macroparameters. The uncertainty associated with the calculated parameters using the proposed method is 2.67%, and this study verifies the accuracy of the linear relationship. The method provides a new way to obtain the interfacial shear stress of gas–liquid stratified flow.VoR made available 06/11/2023.National Natural Science Foundation of China; FundRef: https://doi.org/10.13039/10.13039/501100001809; Grant(s): 62173122Key Project of Natural Science Foundation of Hebei Province; Grant(s): F2021201031Beijing-Tianjin-Hebei Collaborative Innovation Community Construction Project; Grant(s): 20540301DNatural Science Foundation of Hebei Province; FundRef: https://doi.org/10.13039/10.13039/501100003787; Grant(s): F2022201034Hebei Provincial Postgraduate Demonstration Course Project; Grant(s): KCJSX202100
Effects of a transoceanic rowing challenge on cardiorespiratory function and muscle fitness
Get PDFUltra-endurance sports and exercise events are becoming increasingly popular for older age groups. We aimed to evaluate changes in cardiac function and physical fitness in males aged 50-60 years who completed a 50-day transoceanic rowing challenge. This case account of four self-selected males included electro- and echo-cardiography (ECG, echo), cardiorespiratory and muscular fitness measures recorded nine-months prior to and three weeks after a transatlantic team-rowing challenge. No clinically significant changes to myocardial function were found over the course of the study. The training and race created expected functional changes to left ventricular and atrial function; the former associated with training, the latter likely due to dehydration, both resolving towards baseline within three weeks post-event. From race-start to finish all rowers lost 8.4-15.6 kg of body mass. Absolute cardiorespiratory power and muscular strength were lower three weeks post-race compared to pre-race, but cardiorespiratory exercise economy improved in this same period. A structured programme of moderate-vigorous aerobic endurance and muscular training for >6 months, followed by 50-days of transoceanic rowing in older males proved not to cause any observable acute or potential long-term risks to cardiovascular health. Pre-event screening, fitness testing, and appropriate training is recommended, especially in older participants where age itself is an increasingly significant risk factor.AAM added to the record 04/11/2024
Does GOD not also speak through us? Developing a new pedagogy for the formation of women who preach in the Church of England
Get PDFThis thesis explores the formation of women preachers in the Church of England. My research was carried out with a particular group of women preachers, lay and ordained, who attended a conference in 2018 called Women’s Voices. The data generated suggests that theological education and ministerial formation fail women in two ways. First, ministerial training excludes, minoritizes and silences those who are perceived as ‘other’ than a White, male norm. Among other minoritized voices, women’s voices are absent from classrooms, reading lists and theological critique. Second, I argue that for women, the absence of these
voices results in them entering ministry ill-informed about preaching about Bible women or from their own experiences, and ill-prepared for the sexism and misogyny they will encounter.
Based on my exploration of these failures, I make some specific proposals about how preachers might be taught, how women ordinands and trainees might be prepared for the ministry they are to embark on, and how Theological Education Institutions might facilitate the flourishing of marginalised groups. I propose that preaching classes should not only include information about developments in preaching, but also practical sessions in which students explore how to preach from their own experiences and understandings. In line with the women who took part in my research, I propose that spaces be made available where women can support each other. My participants perceived a cycle in which women received support and acceptance from each other, realised that they were being silenced and released each other to resist oppression. I suggest that such spaces be opened up in the classroom so that women are better prepared for ministries that will be marked by sexist reactions to their presence and their preaching.
In making proposals that I see as life-giving and disruptive of the status quo, I draw on the Hebrew prophet Miriam who was a leader of Israel alongside her brother Moses. She both led women to freedom and challenged male domination. As a result of her challenge to Moses, “does God not also speak through us?” she is afflicted with leprosy and banished from the camp. I believe that Miriam’s experience echoes that of many women in the church who are silenced when they challenge male domination.
My research opens up other areas of inquiry I have not had space to pursue, particularly how women’s intersectional experiences might impact their ministerial experiences. My findings among a particular group of women preachers contribute to
curriculum development work and to the ways in which women ministers are formed
(Ba0.6Sr0.4)TiO3/PEEK composites modified by Polyethersulfone with low dielectric constant and high dielectric tunability under DC bias
Get PDFCeramic/polyetheretherketone (PEEK) composites show a wide range of applications and have attracted extensive interest in the scientific community due to their outstanding dielectric and mechanical characteristics. However, the interface connection between the ceramic and PEEK is a vital issue that must be addressed to improve their physical and electrical properties. In this work, the polyethersulfone resin (PES) was selected as interface modifier between barium strontium titanate (Ba0.6Sr0.4TiO3, BST) and PEEK. Cold-pressing sintering was used to create BST/PEEK materials with superior dielectric frequency stability and dielectric tunability. The effects of PES content on the morphology and dielectric characteristics of PES modified BST/PEEK materials were investigated. The results showed PES could improve the dispersion of BST particles in polymer. The dielectric constant, dielectric tunability, and breakdown strength increased first, then reduced as PES content increased. The composite had the most homogeneous microstructure and the best dielectric properties when the PES content was 7.5vol%. The frequency dispersion factor F(x) was much smaller than that of other ceramic/polymer composites reported. In addition, the dielectric tunability of the composites could reach a relatively high level (34.18%) while the dielectric constant was as low as 14. The dielectric tunable efficiency (TuE) was proposed to evaluate the property of low dielectric constant and high dielectric tunability under DC bias. The TuE of PES modified BST/PEEK composites show the highest value comparing with reported dielectric tunable composites. This research laid the path for the development of a novel ceramic/polymer composite with good interface bonding and high dielectric tunability
Reinterpreting the Middle Ages
Get PDFWhat is the most famous ‘Viking funeral’ in modern popular culture? I present a case for the funeral of V in the dystopian fiction of the 1980s graphic novel V for Vendetta and its 2005 film adaptation. Building on earlier roots, the nineteenth-century creation of the Vikings and the Viking Age (c.750–1050) took place through fiction, literary and historical scholarship but also through prominent and influential archaeological investigations of artefacts, sites and monuments in which funerary practices were central and captured the popular imagination. Tied to concepts of feud, fate and faith, this fascination with Old Norse deathways and concepts of the afterlife focused on the conception that the Vikings burned their dead in boats or ships set adrift on open water. By tackling one manifestation of this modern engagement with this imagined Viking past, this epilogue serves as a case study for rethinking the complexity and entanglement of Viking themes in contemporary arts and media, but also to rethink academic public engagements, teaching and research in both Viking and Vikingist studies, and thus medieval/medievalist scholarship more broadly, to counter extremist appropriations
The Role of Community-led Food Retailers in Enabling Urban Resilience
Get PDFOur research examines the extent to which community-led food retailers (CLFRs) contribute to the resilience and sustainability of urban retail systems and communities in the UK, contributing to existing debates on the sustainability and resilience of the UK’s urban retail sector. While this literature has predominantly focused on the larger retail multiples, we suggest more attention be paid to small, independent retailers as they possess a broader, more diffuse spatiality and societal impact than that of the immediate locale. Moreover, their local embeddedness and understanding of the needs of the local customer base, provide a key source of potentially sustainable competitive advantage. Using spatial and relational resilience theories, and drawing on 14 original qualitative interviews with CLFRs, we establish the complex links between community, place, social relations, moral values, and resilience that manifest through CLFRs. In doing so, we advance the conceptualization of community resilience by acknowledging that to realize the networked, resilient capacities of a community, the moral values and behavior of the retail community needs to be ascertained. Implications and relevant recommendations are provided to secure a more sustainable set of capacities needed to ensure resilient, urban retail systems, which benefit local communities
Introducing open book examinations in clinical education: A case study
Get PDFDuring the recent COVID-19 pandemic, in common with educators across the Higher Education sector, the School of Dentistry at the University of Liverpool reimagined the learning and assessment strategy by moving from proctored closed-book assessment to largely unmonitored open-book examinations (OBE). This article discusses understandings from an educator perspective following our implementation of OBE. The educator perspective discussed here indicates that OBE have the potential to be an authentic and acceptable form of assessment, but that some reframing of attitudes towards assessment from all stakeholders and their approaches to assessment is necessary when developing these innovative types of assessment
Cucumeropsis mannii seed oil ameliorates Bisphenol‐A‐induced adipokines dysfunctions and dyslipidemia
Get PDFThis study demonstrated the therapeutic potentials of Cucumeropsis mannii seed oil (CMSO) capable of alleviating BPA‐induced dyslipidemia and adipokine dysfunction. In this study, we evaluated the effects of CMSO on adipokine dysfunctions and dyslipidemia in bisphenol‐A (BPA)‐induced male Wistar rats. Six‐week‐old 36 albino rats of 100–200 g weight were assigned randomly to six groups, which received varied doses of BPA and/or CMSO. The administration of BPA and CMSO was done at the same time for 42 days by oral intubation. The adipokine levels and lipid profile were measured in adipose tissue and plasma using standard methods. BPA induced significant (p < .05) increases in triglycerides, cholesterol, leptin, LDL‐C, and atherogenic and coronary risk indices in adipose tissue and plasma, as well as a decrease in adiponectin and HDL‐C levels in Group II animals. BPA administration significantly (p < .05) elevated Leptin levels and reduced adiponectin levels. BPA plus CMSO reduced triglycerides, cholesterol, leptin, LDL‐C, and atherogenic and coronary risk indices while increasing adiponectin levels and HDL‐C in adipose tissue and plasma (p < .05). The results showed that BPA exposure increased adipose tissue as well as serum levels of the atherogenic index, triglycerides, cholesterol, coronary risk index, LDL‐C, leptin, and body weight with decreased adiponectin levels and HDL‐C. Treatment with CMSO reduced the toxicities caused by BPA in rats by modulating the body weight, adiponectin/leptin levels, and lipid profiles in serum and adipose tissue. This study has shown that CMSO ameliorates BPA‐induced dyslipidemia and adipokine dysfunctions. We suggest for further clinical trial to establish the clinical applications
Handbook of Aging, Health and Public Policy: Perspectives from Asia
Get PDFThis chapter explores the phenomenon of elder abuse. The chapter explores the reason why it is hidden yet there is a visible aging population. In terms of the policing of elder abuse, it has been an enduring case for social workers and social carers rather than for law enforcement and criminal justice agencies. The chapter further explores how and why elder abuse remains an important yet under-researched topic of social and theoretical analysis. Drawing from the work of Michel Foucault on power and surveillance, we ascertain that elder abuse gives legitimacy for welfare professionals for their roles yet, in comparison, the criminalization process is absent for law enforcement. We raise critical questions: Why elder abuse has not been taken seriously as child abuse? Is this a question of priorities or a problem of not taking elder abuse seriously enough for criminal justice agencies? The chapter finds that the processing of offenders has been exceptionally small, when the visibility of elder abuse must be higher for policy makers and law enforcement
The vulnerability of in-between statuses: ID and migration controls in the cases of the ‘Windrush generation’ scandal and Brexit
Get PDFThis is an Accepted Manuscript of an article published by Taylor & Francis in Identities: Global Studies in Culture and Power on 23/01/2023, available online: https://doi.org/10.1080/1070289X.2023.2170607In this article, I argue that identity documents (ID) and migration statuses are both tools of population control and subjectivities that individuals have an interest in holding. I use documentary analyses and interviews with 31 EU27 citizens in the UK, 21 UK citizens in Belgium and the UK and with nationality bureaucracies in the two countries. States create legitimate, illegitimate and in-between statuses, and in-between statuses show how being exempt from certain ID and migration controls can create paradoxical vulnerabilities. Windrush generation migrants in the UK were exempt from migration controls but then in some cases were treated as irregular migrants because of the lack of proof of status. EU citizens were free from many migration controls, but can have difficulties in naturalization and dealing with new requirements brought about by Brexit because the procedures can require proof of rights usually produced through the migration controls they were exempt from
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