Miracle-dz/UniFAR-FTUs huggingface dataset:
Numerical study of bluntness effects on laminar leading edge separation in hypersonic flow

Bluntness effects on laminar hypersonic leading edge separation are investigated numerically at Mach number $M\approx 10$ , unit Reynolds number $Re=1.3\times 10^{6}~\text{m}^{-1}$ , specific enthalpy $h_{o}=3.1~\text{MJ}~\text{kg}^{-1}$ and wall-to-stagnation temperature ratio $T_{w}/T_{o}=0.1$ . Such effects are important from an experimental point of view and because bluntness can affect a separated flow favourably or adversely. In this study, two blunt leading edge cases of small radius ( $15~\unicode[STIX]{x03BC}\text{m}$ ) and large radius ( $100~\unicode[STIX]{x03BC}\text{m}$ ) are investigated. A comparison with the idealised sharp leading edge case is also given. General flow features and surface parameters such as the shear stress, pressure and heat flux are presented and analysed. The results have also been interpreted in terms of Cheng’s displacement-bluntness similitude parameter affecting the size of separation. Previous experiments by Holden delineated small and large bluntness effects based on Cheng’s parameter and considering small to moderate separated regions. In this study, leading edge separation was found to suppress the favourable effect of bluntness in delaying separation. Bluntness, furthermore, seemed to promote the appearance of secondary vortices within a main separated region. Analysis of reverse flow boundary layer profiles such as velocity, pressure and temperature is also given. It is shown that bluntness accentuates large transverse gradients. This in turn adversely effects the reverse flow boundary layer leading to the appearance of secondary vortices.
Power Leakage Elimination for Wideband mmWave Massive MIMO-OFDM Systems: An Energy-Focusing Window Approach

When the large antenna array and the large bandwidth are deployed in a massive multiple-input multiple-output (MIMO) system, the spatial-wideband effect and the related beam squint effect make the energy of each multipath component distributed mainly within a square area in angle-delay domain rather than distributed like an impulse. With the finite numbers of antennas and subcarriers in practical massive MIMO-OFDM systems, the power leakage of each path outside the corresponding square area is non-negligible. In this paper, we first derive the millimeter-wave (mmWave) massive MIMO channel model for OFDM transceivers and then design an optimal energy-focusing window, which shapes the channel in spatial-frequency domain to maximally concentrate the energy of each multipath component inside the corresponding square area in angle-delay domain. With the help of this window, the power leakage can be significantly reduced. As a result, the sparsity of mmWave channels can be primely preserved and the inter-user interference can be significantly alleviated for angle- and delay-based channel estimation and precoding. Simulation results demonstrate the effectiveness of the proposed window design.
L1 use and implications in English language teaching in Vietnam

The debate on the role of the first language (L1) use in foreign language classrooms has not reached a conclusive outcome and remains a controversial topic. A number of studies have been carried out across the globe in order to analyse the role of L1 in EFL classrooms. Some experts believe that the use of L1 would seriously narrow down the scope for the target language input and output and that it should therefore be abandoned, while others see a pedagogical value in L1 use in language classrooms. In Vietnam, there seems to be a gap regarding the use of L1 in EFL classrooms. The present study attempts to fill this gap by examining how Vietnamese teachers of English as a foreign language (EFL) use Vietnamese (L1) in their classrooms.
A Survey of School Counselor Multicultural Education Behaviors and the Obstacles That Impede Them.

In this study, researchers examined the frequency with which school counselors enact multicultural education behaviors and the obstacles preventing those behaviors. Using theoretical dimensions and approaches to multicultural education, they developed an instrument measuring school counseling multicultural education behavior. After pilot testing the instrument (n = 114), they distributed a refined instrument to a state school counselor database, and 594 school counselors participated in the primary data collection. Researchers used exploratory factor analysis to determine five factors comprising 72% combined variance of school counselor multicultural education behaviors. Participants enacted behaviors in two factors (Classroom Guidance with Multicultural Education Emphases and Human Relations) occasionally and behaviors in three factors (Professional Development with Multicultural Education Emphases, Knowledge Construction, and Teaching the Exceptional and Culturally Different) rarely. The most common obstacles preventing behaviors were not enough time and not needed. Researchers discuss implications for engaging in and promoting multicultural education in schools.
Proactive management in the context of construction supply chains

Abstract Proactive management addresses problems in advance. It is advantageous over reactive management that does not respond to any issues until they grow to become obvious and critical problems. However, scarce studies to date investigate proactive management from the perspective of construction supply chains. To overcome the limitation within existing studies, this research explores the significance of proactive management in the context of construction supply chains through a thorough investigation. The investigation in this research adopts a mix of a literature review, a questionnaire survey and a series of interviews. This research provides clear evidence for an increasing prevalence of proactive management in today’s construction practice. Proactive management proves to significantly contribute to both problem avoidance/minimization and continuous improvement. Compared to supply chain integration, supply chain collaboration is found to have a closer linkage with proactive management. This research highlights the importance of developing a proactive and collaborative culture in construction.
Improved Target Signal Source Tracking and Extraction Method Based on Outdoor Visible Light Communication Using an Improved Particle Filter Algorithm Based on Cam-Shift Algorithm

An improved particle filter algorithm based on Cam-Shift algorithm applied to outdoor visible light communication (outdoor-VLC) is presented in this paper. In the outdoor-VLC system, accurately and completely tracking and extracting the target signal source Light Emitting Diode (LED) area is the premise for realizing communication. However, few existing studies pay attention to it. In the dynamic outdoor environment, there will be a lot of different environmental interferences (such as background interference, similar object interference, etc.), which greatly increases the difficulty of tracking and extracting the target signal source LED area. Therefore, in this paper, an improved tracking algorithm is proposed to solve the problem of how to track and extract the target signal source LED area accurately, stably and in real time in the outdoor-VLC system under various environmental interferences, so as to increase the feasibility of practical application of VLC system in outdoor scenes. This improved algorithm combines the particle filter algorithm and Cam-Shift algorithm originally. Experimental results show that the proposed algorithm has good accuracy, robustness and real-time performance under the environment of multiple interference factors. Accordingly, the proposed algorithm can be applied to the outdoor-VLC system with various environmental interferences, and can realize the actual first step of communication in VLC system based on image sensor well, laying a foundation for feature extraction, data transmission and other subsequent steps.
Moral Distress, Wellness, and Professional Quality of Life in Play Therapists

Play therapy is a developmentally appropriate form of therapy for children that uses their natural mode of communication-play-to help them process experiences, thoughts, and feelings (Kottman, 2011; Kottman & Meany-Walen, 2016; Landreth, 1991). The unique nature of play therapy, however, is hypothesized to be more emotionally demanding and thus has potential for increased levels of work-related stress (Eastwood & Ecklund, 2008; McGarry et al., 2013; Perron & Hiltz, 2006; Van Hook & Rothenburg, 2009). This study investigated the relationships among moral distress, wellness, and professional quality of life (i.e., compassion satisfaction, burnout, and secondary traumatic stress) in Registered Play Therapists, Registered Play TherapistSupervisors, and School Based-Registered Play Therapists (N = 161). Results indicated wellness was positively correlated with both burnout and secondary traumatic stress and negatively correlated with compassion satisfaction. Additionally, more experienced play therapists had higher levels of moral distress. Both moral distress and wellness were significant predictors for burnout; however, only wellness was a significant predictor for compassion satisfaction and secondary traumatic stress. Finally, play therapists overwhelmingly indicated creativity as an integral part of their wellness endeavors. INDEX WORDS: Moral distress, compassion satisfaction, burnout, wellness, play therapy MORAL DISTRESS, WELLNESS, AND PROFESSIONAL QUALITY OF LIFE IN PLAY
Slug Translational Velocity for Highly Viscous Oil and Gas Flows in Horizontal Pipes

Slug translational velocity, described as the velocity of slug units, is the summation of the maximum mixture velocity in the slug body and the drift velocity. Existing prediction models in literature were developed based on observation from low viscosity liquids, neglecting the effects of fluid properties (i.e., viscosity). However, slug translational velocity is expected to be affected by the fluid viscosity. Here, we investigate the influence of high liquid viscosity on slug translational velocity in a horizontal pipeline of 76.2-mm internal diameter. Air and mineral oil with viscosities within the range of 1.0–5.5 Pa·s were used in this investigation. Measurement was by means of a pair of gamma densitometer with fast sampling frequencies (up to 250 Hz). The results obtained show that slug translational velocity increases with increase in liquid viscosity. Existing slug translational velocity prediction models in literature were assessed based on the present high viscosity data for which statistical analysis revealed discrepancies. In view of this, a new empirical correlation for the calculation of slug translational velocity in highly viscous two-phase flow is proposed. A comparison study and validation of the new correlation showed an improved prediction performance.
Implementation of Artificial Intelligence in Fashion: Are Consumers Ready?

Given the growing interest in combinations of fashion and digital innovations, it is critical for both researchers and retailers to understand how consumers respond to new technologies, especially artificial intelligence (AI). The purpose of the study was to examine consumers’ attitudes and purchase intention toward an AI device. By adapting the technology acceptance model, a conceptual model was constructed and tested related to consumers’ attitudes and purchase intention toward an AI device—Echo Look. A total of 313 subjects (61% female) between 18 and 65 years old in the top 10 metropolitan areas in the United States participated in the study. The results indicated that perceived usefulness, perceived ease of use, and performance risk were significant in consumers’ attitude toward AI. Positive attitudes toward technology positively influenced the purchase intention. Based on these results, theoretical and practical implications are discussed.
Does the Use of Mind Mapping as a Learning Strategy by Physician Assistant Students Promote Critical Thinking as Measured by the Health Science Reasoning Test

Physician Assistant (PA) students need to assimilate and integrate voluminous information quickly and effectively to promote critical thinking skills needed to deliver competent care. Mind mapping is an innovative strategy used to facilitate students’ recognition and recall of key information and ensure depth in their understanding via making connections between pieces of information. Based on the establishment of relationships between concepts expressed in mind maps, critical thinking skills are further developed. Seventy-four PA students were randomly assigned to Standard Note Taking Group (SNTG) or Mind Mapping Group (MMG) to complete the pre-HSRT (Health Science Reasoning Test). MMG were then instructed on how to construct mind maps and create weekly mind maps for nine weeks. The SNTG followed their own method of study and did not make mind maps for nine weeks. Differences in the mean preand post-overall HSRT scores between the groups and within the groups were analyzed using independent and dependent t-test respectively. There was no significant difference between preand post-overall critical thinking scores as measured by HSRT post-nine weeks of intervention in both groups. There was no significant difference in the mean pre-HSRT overall critical thinking scores between the groups. However, there was a significant difference in the mean overall post-HSRT scores between the groups (p=.026). Hence, mind mapping is a viable active learning strategy to promote critical thinking in PA students.
Interprofessional Education for Social Work Students: Findings From a Cross-Sectional Study

This exploratory study aids understanding of the experiences of baccalaureate social work students participating in an interprofessional (IP) simulation and how the simulation would inform their future practice. This study used a nonrandom purposive sample of 32 undergraduate social work students from one midwestern university who attended one of three Team STEPPS seminar training days offered during three semesters. Postseminar surveys were completed, and conventional content analysis was used to analyze data. Three themes emerged regarding the first research question of understanding students' experiences in an IP environment: (1) benefits of IP collaboration, (2) social work as a big part of the puzzle, and (3) real-life learning. Three themes emerged regarding the second research question of these students' future practice: (1) communication, (2) self-confidence, and (3) knowledge gained. The results reveal the value of participation in IP simulation activities for undergraduate social work students and support the need for continued development and implementation of such activity.
Gossip and the Everyday Production of Politics

Although gossip is disapproved of across the world's societies, it is a prominent feature of sociality, whose role in the construction of society and culture cannot be overestimated. In particular, gossip is central to the enactment of politics: through it people transform difference into inequality and enact or challenge power structures. Based on the author's intimate ethnographic knowledge of Nukulaelae Atoll, Tuvalu, this work uses an analysis of gossip as political action to develop a holistic understanding of a number of disparate themes, including conflict, power, agency, morality, emotion, locality, belief, and gender. It brings together two methodological traditions - the microscopic analysis of unelicited interaction and the macroscopic interpretation of social practice - that are rarely wedded successfully.Drawing on a broad range of theoretical resources, Niko Besnier approaches gossip from several angles. A detailed analysis of how Nukulaelae's people structure their gossip interactions demonstrates that this structure reflects and contributes to the atoll's political ideology, which wavers between a staunch egalitarianism and a need for hierarchy. His discussion then turns to narratives of specific events in which gossip played an important role in either enacting egalitarianism or reinforcing inequality. Embedding gossip in a broad range of communicative practices enables Besnier to develop a nuanced analysis of how gossip operates, demonstrating how it allows some to gain power while others suffer because of it.
Surface electronic structure of bismuth oxychalcogenides

This work was supported by the Fundamental Research Program of the State Academies of Sciences, line of research III.23, and the Academic D. I. Mendeleev Fund Program of Tomsk State University (Project No. 8.1.01.2018). The support from the Saint Petersburg State University (Project No. 15.61.202.2015), Basque Country Government, Departamento de Educacion, Universidades e Investigacion (Grant No. IT-756-13), and the Spanish Ministry of Science and Innovation (Grant No. FIS2016-75862-P) is also acknowledged. Calculations were performed using computational resources provided by Resource Center “Computer Center of SPbU” and the SKIF-Cyberia supercomputer at the National Research Tomsk State University. S.V. E. thanks I. A. Nechaev for fruitful discussions.
Navigating nightlife: women’s discourses on unwanted attention in nightlife settings in Norway

Abstract Mainstream nightlife has traditionally been a space marked by compulsory (hetero) sexuality and heteronormativity, making it a key arena for exploring gendered power relations and sexual harassment. In this paper, women’s experiences of unwanted attention in nightlife are explored to shed light on these gendered power relations in contemporary nightlife. The article is based on 50 in-depth qualitative interviews with Norwegian women aged 18–34 years. Three discourses of gender relations in nightlife are identified: a vulnerability discourse, constructing nightlife as a dangerous space for women; an equality discourse, emphasizing women’s equal rights in nightlife; and a feminine power discourse, presenting women’s role as objects of sexual desire as a source of gendered power for women. This article points to both changes and continuities in the norms governing women’s participation in nightlife and the patterns of heterosexual interactions in Norwegian nightlife. These changes seem to be closely connected to the performances of different and new femininities in nightlife settings. Despite the prevalence of an ‘egalitarian’ femininity in nightlife, the article argues that this comes with its own restraints on women participating in nightlife.
Burnout and Self-stigma of Seeking Psychological Help in Military Healthcare Providers

Military healthcare providers (HCPs) are tasked with maintaining the military’s mission readiness while balancing the roles of being providers and military members themselves. As such, military HCPs serve in various settings, including hospitals, clinics, ships, and austere environments. Military HCPs may experience a host of occupational stressors, such as long deployments, being in the line of fire, seeing dead or injured comrades, responding to mass casualty events, having excessive caseloads, and working prolonged hours. These factors make military HCPs susceptible to burnout. Unfortunately, stigma of seeking psychological help is prevalent in the military and may deter individuals from seeking the psychological help they need. The purpose of this study was to examine the relationship between burnout and self-stigma of seeking psychological help in military HCPs to include behavioral health and medical providers, as influenced by, but not limited to, military status (e.g., civilian or military), gender, and profession. Findings from this study revealed a significantly positive relationship between burnout and selfstigma of seeking psychological help and a significantly negative relationship between being a behavioral-health provider and burnout. All other hypotheses were not supported. Results from this study can offer guidance to inform policy and improve wellness and self-care programs for providers. Explanations of the results, limitations of the study, and future implications are also discussed.
Supporting English Language Learners’ Academic Writing Development Through a Systematized Assistance Model

Despite recent efforts to improve college-level students’ academic writing, the ways this skill develops continues to be vastly unexplored. Students do not meet the current literacy demands posed by higher education. These demands become more strenuous when students have to write in English, a language they do not master. The current study reports on the implementation of a systematized assistance model for writing in English as a Foreign Language in a Colombian public university’s bilingual teacher education program. Weekly tutoring sessions were provided to 16 students from an academic writing course in one semester. Common error patterns in their writing samples were identified and categorized with an analytical rubric and students’ reactions to the systematized assistance model were collected through a questionnaire. Results revealed that students benefited significantly from tutor support and professor’s feedback especially in terms of metalinguistic awareness, knowledge of the Process Approach to writing and accuracy in language convention use.