bluuebunny/crossref_metadata_2025 huggingface dataset:
Amino acid substitution in the S1 or CH1-CH2 linker domain of TRPM4: Two newTRPM4variants found in complete heart block patients lead to gain of expression and gain of current
Authors: Boukenna Mey , Arullampallam Prakash , Taib Choshiman , Guichard Sabrina , Rougier Jean-Sébastien , Gollob Michael H. , Abrie Hugues
Published: March 2023

Withdrawal Statement

“The authors have withdrawn their manuscript owing to the following: In an effort to conduct blinded reproducibility experiments, they encountered difficulties in reproducing a portion of the data pertaining to the pathogenicity of the variants. While the clinical data presented in the manuscript are not affected, they are actively working to address and resolve these issues. The authors will resubmit the manuscript once they have ensured the accuracy and integrity of all the experimental data. Therefore, the authors do not wish this work to be cited as reference for the project. If you have any questions, please contact the corresponding authors.”
Interlinkages of cryptocurrency and stock markets during the COVID-19 pandemic by applying a QVAR model
Authors: Yen Nguyen Hong , Ha Le Thanh
Published: March 2023

Purpose

This paper aims to study the interlinkages between cryptocurrency and the stock market by characterizing their connectedness and the effects of the COVID-19 crisis on their relations.

Design/methodology/approach

The author employs a quantile vector autoregression (QVAR) to identify the connectedness of nine indicators from January 1, 2018, to December 31, 2021, in an effort to examine the relationships between cryptocurrency and stock markets.

Findings

The results demonstrate that the pandemic shocks appear to have influences on the system-wide dynamic connectedness. Dynamic net total directional connectedness implies that Bitcoin (BTC) is a net short-duration shock transmitter during the sample. BTC is a long-duration net receiver of shocks during the 2018–2020 period and turns into a long-duration net transmitter of shocks in late 2021. Ethereum is a net shock transmitter in both durations. Binance turns into a net short-duration shock transmitter during the COVID-19 outbreak before receiving net shocks in 2021. The stock market in different areas plays various roles in the short run and long run. During the COVID-19 pandemic shock, pairwise connectedness reveals that cryptocurrencies can explain the volatility of the stock markets with the most severe impact at the beginning of 2020.

Practical implications

Insightful knowledge about key antecedents of contagion among these markets also help policymakers design adequate policies to reduce these markets' vulnerabilities and minimize the spread of risk or uncertainty across these markets.

Originality/value

The author is the first to investigate the interlinkages between the cryptocurrency and the stock market and assess the influences of uncertain events like the COVID-19 health crisis on the dynamic interlinkages between these two markets.
The impact of differentiated empowering leadership on employees’ depression: moderation of employees’ envy and gender
Authors: Qasim Neelam , Arshad Muhammad , Farooq Omer , Raoof Rabeeya
Published: March 2023

Purpose

This study aims to investigate the effect of differentiated empowering leadership on employees’ depression. Using the behavioral theory of depression, this study further explores the simultaneous moderation of gender and employees’ envy on the relationship between such leadership and employees’ depression.

Design/methodology/approach

Data were collected using two surveys conducted with a time lag of one week. In Time 1, data on differentiated empowering leadership and employees’ envy were collected. After a week, data on employees’ depression were collected. Model testing was conducted using data on a sample of 420 employees from 87 departments in 27 service sector organizations in Pakistan. Hypotheses were tested using the structural equation modeling technique in Mplus.

Findings

Results indicate that perceived differentiated empowering leadership positively affects employees’ depression. In addition, this positive effect is further moderated by employees’ envy and gender simultaneously, such that this effect is weakest among the male individuals who feel low envy, whereas, for highly envious females, this effect is strongest.

Originality/value

To the best of the authors’ knowledge, this is the first study to examine the effect of differentiated empowering leadership on employees’ depression along with the moderation of employees’ envy and gender. Furthermore, this study provides some policy implications based on its findings to decrease employees’ depression.
Effect of natural resources rents on income inequality in sub-Saharan Africa: exploring the direct and indirect transmission mechanisms
Authors: Akpa Armand Fréjuis
Published: March 2023

Purpose

The reduction of income inequality and the ways to fight against it are source of debate among scientific communities and policymakers. Rents from natural resources that African countries are endowed with remain one way to cope with income inequality, but its influence on income inequality is mixed. Thus, the purpose of this paper is to explore the direct and indirect transmission mechanisms through which natural resources rents can affect income inequality in sub-Saharan Africa.

Design/methodology/approach

This study obtained data on income inequality from the Standardised World Income Inequality Data database, natural resources rents from World Bank’s Development Indicators and education from United Nations Development Programme for the period 1990–2018. It was analysed using system generalised method of moments.

Findings

The results of this study showed that natural resources rents solely increased income inequality, but its interaction with education significantly reduced income inequality.

Research limitations/implications

These findings suggest that the reduction of income inequality by natural resources rents passes through a good education system in sub-Saharan African countries.

Originality/value

In previous studies, authors analysed the role of education in the relationship between natural resources rents and income inequality by inserting the two variables separately in the model. But in this paper, the author analysed the role of education in the relationship between natural resources rents and income inequality by using the interaction of natural resources rents and education.
Economic migrants in the Czech segmented labour market: Covid-19 as a magnifying glass
Authors: Gheorghiev Olga
Published: March 2023

Purpose

This study examines Covid-19-related policies as a showcase for priorities in migration governance, the role of the state and employers’ associations, as well as gaps in social security and social protection.

Design/methodology/approach

This paper looks at how immigration interacts with the labour market in the Czech Republic through the prism of the varieties of capitalism framework and its relation to the concepts of labour market segmentation and flexibility.

Findings

The findings show that pandemic-related measures focused on continuously adjusting a legislative framework granting access to third-country workers. However, protective measures that would guarantee migrant workers and their families access to social rights, such as healthcare, were lacking. In this context, several lines of segmentation are observed: between migrant workers in standard employment and those in non-standard employment, when looking at their access to healthcare; between migrants hired directly by employers and those working through temporary agencies in terms of their wages, stability and protection; and, at a sectoral level, between the skilled workforce and migrants that are pushed to low-qualified poorly paid, and routinised jobs.

Originality/value

This paper expands the existing literature on the preferences and influence of governments, employers and trade unions regarding the demand for foreign labour in varieties of capitalism by adding the perspective of a Central European economic model. At the same time, its findings contribute to the understanding that labour market inequalities are not fostered on the supply side of migrant labour, through exogenous societal or cultural characteristics specific to countries of origin, but rather through institutionalised measures, practices and policies in countries of destination.
Unspoken teacher conflict: uncovering female novice teachers' conflict experiences in professional learning community
Authors: Hou Yansi , Chen Shuangye , Yu Shulin
Published: March 2023

Purpose

The professional development of novice teachers is receiving increased attention. Although conflict is regarded as an essential factor affecting the effectiveness of the school professional learning community, it is often hidden unspokenly. This study uncovers the conflict experiences of female novice teachers in an Asian cultural context and investigates how such experiences influence their professional development and emotions.

Design/methodology/approach

The case study approach was adopted. Four participants were selected according to specific criteria, and two rounds of semi-structured interviews were conducted in five years to identify the conflicting parties, conflict types, coping strategies and resulting impact.

Findings

Longitudinal qualitative data have revealed that female novice English language teaching (ELT) teachers mainly reported conflicts with their female colleagues. Goal, task and relationship conflict are the most common types of conflict encountered, while the strategies of avoiding, dominating and obliging are the most popular. This study also discusses the impacts of such conflict experiences.

Originality/value

This study identifies the influence of culture, particularly a culture of high power distance and an emphasis on “precious harmony”, on novice female teachers' conflict coping and offers insights into how conflict can be utilised to enhance novice teachers' professional development in the school professional learning community.
On whose side are you: perspective-taking and attribution of blame in handling sexual harassment complaints
Authors: Adikaram Arosha S. , Kailasapathy Pavithra
Published: March 2023

Purpose

The authors aim to explore how perspective-taking and attribution of blame lead to side-taking by human resource professionals (HRPs) when making judgements and handling complaints of sexual harassment.

Design/methodology/approach

Employing qualitative methodology, the authors used semi-structured in-depth interviews with 35 HRPs from 30 companies in Sri Lanka. Attribution theory and perspective-taking were used as theoretical lenses.

Findings

In handling complaints of sexual harassment incidents, HRPs take the perspectives of the alleged perpetrator, complainant, or the company and attribute the blame to the alleged perpetrator or the complainant. Irrespective of the gender of the HRPs and the perspective they take, they would most often blame the female complainants due to sexual harassment myths and misperceptions and traditional sex-role beliefs. Thus, they either take the side of the alleged perpetrator or the company, explicitly/implicitly or intentionally/unintentionally.

Originality/value

The central originality of this research is the finding that HRPs take sides in resolving complaints of sexual harassment and perspective-taking and attribution of blame by HRPs lead to this side-taking in organisational settings.
Next generation employability and career sustainability in the hospitality industry 5.0
Authors: Hussain Sarah , Singh Anubha Mahender , Mohanty Priyakrushna , Gavinolla Mahender Reddy
Published: March 2023

Purpose

With an industry 5.0 revolution taking place in the hospitality industry, a shift from manual to cognitive labor is anticipated, characterized by greater sustainability, resilience and a human-centric approach. In this regard, hospitality educators' ability and willingness to teach novel topics such as automation at work, upskilling of employees, man-machine interaction and service robots have become more important than ever. This study aims to interpret the perspectives of hospitality educators about bridging the gap in the employability skills of (next-gen) hospitality graduates and the concerns relating to career sustainability in times of transition.

Design/methodology/approach

A case study method was used given the novelty of the topic in a developing country like India. A qualitative survey with open-ended questions, is employed to understand the viewpoints of Indian hospitality educators, including those with more than 15 years of teaching experience. In-depth interviews were conducted with 23 hospitality educators to reach the theoretical saturation point. MAXQDA software was used to analyze the qualitative data collected in the study.

Findings

The findings reveal the challenges and motivations of hospitality educators in adapting to frequently changing business environments. In doing so, it sheds light on the methods employed to create a generation of hospitality graduates aligned with the changing dynamics of the industry.

Originality/value

The paper presents the viewpoints of hospitality educators in India in relation to a futuristic approach to next-gen employability and career sustainability. Whilst numerous studies have focused on the role of robots and artificial intelligence in replacing the human component of the service environment, the concept of people working alongside advanced technologies is fairly new and needs to be fully explored.
Trophic interrelationships of bacteria are important for shaping soil protist communities
Authors: Nguyen Thi Bao Anh , Chen Qing‐Lin , Yan Zhen‐Zhen , Li Chaoyu , He Ji‐Zheng , Hu Hang‐Wei
Published: March 2023

Protists occupy multiple trophic positions in soil food webs and significantly contribute to organic matter decomposition and biogeochemical cycling. Protists can ingest bacteria and fungi as main food sources while being subjected to predation of invertebrates, but our understanding of how bottom‐up and top‐down regulations structure protists in natural soil habitats is limited. Here, we disentangle the effects of trophic regulations to the diversity and structure of soil protists in natural settings across northern and eastern Australia. Bacterial and invertebrate diversity were identified as important drivers of the diversity of functional groups of protists. Moreover, the compositions of protistan taxonomic and functional groups were better predicted by bacteria and fungi, than by soil invertebrates. There were strong trophic interconnections between protists and bacteria in multiple organismic network analysis. Altogether, the study provided new evidence that, bottom‐up control of bacteria played an important role in shaping the soil protist community structure, which can be derived from feeding preferences of protists on microbial prey, and their intimate relationships in soil functioning or environmental adaptation. Our findings advance our knowledge about the impacts of different trophic groups on key soil organismic communities, with implications for ecosystem functions and services.
COVID‐19 and preeclampsia: The unique and the mutually nonexclusive clinical manifestations
Authors: Shetty Shrimati , Kshirsagar Shrinath , Bansal Shweta , Rangarajan Savita , Phadke Varsha
Published: March 2023

Preeclampsia (PE) is a serious, unpredictable hypertensive disorder of pregnancy present in around 8–10% of all pregnancies resulting in high rate of maternal and fetal morbidity and mortality. With the pathophysiology partially known, delivery is the only cure for PE. The disease sets due to multiple pathologic processes involving endothelial cell activation, inflammation, multiorgan damage and syncytiotrophoblast stress.  Though the primary target organ is lungs in COVID‐19, other systemic manifestations which include endothelial dysfunction, dysregulated angiogenesis, thrombosis, liver injury, thrombocytopenia, hypertension and kidney damage overlap with PE. COVID‐19 patients show a higher incidence of PE as compared to their noninfected counterparts and vice versa. Similar pathophysiology and clinical features make differential diagnosis challenging. For effective and specific management, it is important to differentiate actual PE from COVID‐19 with PE like features. There are contradictory reports about the accuracy of diagnostic tools in distinguishing PE from severe COVID‐19 with PE like features. With the available data, it can only be stated that PE is a common adverse pregnancy event, which may be exacerbated by, or may exacerbate, COVID‐19. Future research should focus on cohesive understanding of the pathophysiology of the clinical manifestations, and preventive strategies during pregnancy.
Globalization and Promissory Representation
Authors: Schneider Christina J. , Thomson Robert
Published: March 2023

Despite the centrality of promise keeping to representation, we know little about how it is affected by economic globalization, which is one of the modern world's defining characteristics. We argue that globalization reduces governing parties' ability to keep their campaign promises. We test the empirical implications of our theory with a mixed‐methods approach that combines a large‐n quantitative comparative analysis of pledge fulfillment with a typical case study to trace the underlying causal mechanisms of the theory. The findings indicate that international economic integration exerts a large negative effect on the likelihood of pledge fulfillment in a broad range of contexts and that the hypothesized mechanisms are clearly observable in the detailed case study. These findings have important implications for democratic representation in a globalized world.
Covid‐19‐tested food labels
Authors: Shi Longzhong , Chen Xuan , Chen Bo
Published: March 2023

While the transmission of virus SARS‐CoV‐2 via food is rare, some Chinese food retailers are considering a Covid‐19‐tested food label. However, how consumers may support such a label is unknown. We quantify Chinese consumers’ willingness to pay (WTP) for food carrying a Covid‐19‐tested label using an online choice experiment. We find that the WTPs for such a label are always positive for all food products considered. The amount of WTP depends on the entities authenticating the labels, country of origin of the food, and consumers’ socio‐demographic status. Contrary to expectation, the knowledge on Covid‐19 does not affect consumer preferences for the Covid‐19‐tested food labels. Our benefit and cost analysis suggests a possible large benefit of creating and administering a Covid‐19‐tested food label. This study provides insights for policymakers, global food manufacturers, and retailers to create marketing strategies to alleviate consumer food safety concerns associated with Covid‐19.
Prolonged diversion after ileal pouch‐anal anastomosis: Is it safe to wait?
Authors: Clancy Cillian , Connelly Tara M. , Jia Xue , Lipman Jeremy , Lightner Amy L. , Hull Tracy , Steele Scott R. , Holubar Stefan D.
Published: March 2023

Aim

Diverting loop ileostomy reversal (DLI‐R) is routinely performed from 2–6 months following ileal pouch‐anal anastomosis (IPAA). The safety of delayed reversal after IPAA is not well‐defined. The aim of this study was to determine if prolonged diversion is associated with adverse outcomes compared to routine closure.

Methods

Adult patients undergoing primary IPAA with DLI from 2000 to 2021 were included in this retrospective cohort study from our institutional database. Patients were stratified into tertiles based on timing of reversal: Routine (56–116 days), Delayed (117–180 days), or Prolonged (>6 months). Univariate analysis compared categorical variables between groups. Patients reversed at <8 weeks were excluded.

Results

In total, 2615 patients underwent DLI‐R following IPAA (3‐stage 61%, 2‐stage 39%; mean age 39.9 years). DLI‐R was performed as Routine, Delayed and Prolonged in 1908 (72.9%), 426 (16.4%) and 281 (10.8%), respectively. Overall, DLI‐R related complications occurred in 12.4% (n = 324). The complication rate in the Routine group was 11% (n = 210), in the Delayed group was 12.2% (n = 52) and in the Prolonged group was 22.1% (n = 62). Reasons for prolonged diversion in the Prolonged group were complications at the time of IPAA in 207 (73.9%) or patient preference/scheduling in 73 (26.1%). DLI‐R >6 months after IPAA due to complications had higher rates of overall complications following ileostomy reversal (OR 2.6, 95% CI 1.85–3.72, p < 0.001) whereas when DLI‐R was delayed due to preference/scheduling outcomes were not different than the Routine group (p = 0.28).

Conclusion

Prolonged time to ileostomy reversal after IPAA is probably safe without increased risk of complications when due to patient preference.
The effects of Bythotrephes longimanus invasion on diets and growth of age‐0 yellow perch in Oneida Lake, New York
Authors: Jordan Peter D. B. , Figary Stephanie E. , Brooking Thomas E. , Holeck Kristen T. , Hotaling Christopher W. , VanDeValk Anthony J. , Rudstam Lars G.
Published: March 2023

Bythotrephes longimanus is a predatory zooplankton native to Eurasia known for its large caudal spine. This species can decrease Daphnia abundance and may decrease growth rates of native planktivorous fish including yellow perch (Perca flavescens). Bythotrephes was first documented in Oneida Lake, USA in 2019 and reached high densities in 2020 and 2021. This recent invasion created an opportunity to investigate at what length yellow perch feed on Bythotrephes, if age‐0 yellow perch select for Bythotrephes, and if yellow perch first‐year growth decreased. We found Bythotrephes in the stomachs of 23% (2020) and 35% (2021) of age‐1 and older yellow perch caught from June through September and 54% of the age‐0 yellow perch caught from June through October (2021). Age‐0 yellow perch started feeding on Bythotrephes at 27 mm and selected for Bythotrephes from June 24 through the autumn of 2021. Bythotrephes accounted for 54% of age‐0 diets by dry weight over the summer and fall. We used the extensive water quality and biological monitoring data from Oneida Lake to develop a multivariate linear regression model for age‐0 yellow perch October length from 1993 to 2021. Significant variables included were age‐0 yellow perch abundance (negative effect) and temperature, Daphnia biomass, and Bythotrephes presence, all positive effects. Contrary to our expectations, Bythotrephes were selected by age‐0 yellow perch from end of June through October, and contributed a substantial proportion of ingested mass by age‐0 perch, without negatively affecting age‐0 yellow perch growth.
Dental students' and faculty perception of online exams with e‐invigilation in Cyprus
Authors: Giannakopoulos Kostis , Kavadella Argyro , Kavvadia Katerina , Yiallouris Andreas , Kaklamanos Eleftherios G.
Published: March 2023

Introduction

During the recent pandemic, e‐learning and e‐assessment methods have been implemented worldwide, providing opportunities for further implementation in the dental curriculum. This study aims to research the dental students' and dental faculty's perceptions of online exams with e‐invigilation.

Materials and Methods

Online questionnaires were developed and delivered, after three semesters of online exams, to all students and faculty. Descriptive statistics were performed, and answers were grouped into Principal Components (PC) using Principal Component Analysis (PCA). Statistical significance was set at p < .05.

Results

Two‐hundred and sixty dental students (83.7%) and 24 dental faculty members (63.1%) answered the online questionnaires. PCA of students' responses revealed 4 PC, ‘University support to students’, ‘Comparison between online and face‐to‐face exams’, ‘Preparation for the online exams’ and ‘Attitudes towards the technology used for the online exams’. PCA of faculty responses revealed 5 PC: ‘Comparison between online and face‐to‐face exams’, ‘University support to faculty’, ‘Faculty attitudes towards the exam procedures’, ‘Human factors associated with the exam procedures’ and ‘Exam invigilation’. The overall satisfaction was high for both staff and students (higher for students and female staff). Students with previous experience in online exams scored more positively than first‐year students. University support, process‐related stress and e‐invigilation were highlighted.

Conclusions

The overall satisfaction with the e‐exams was high, despite the technical problems, time‐consuming processes and related stress. University support (training, IT support and resources) and mock exams emerged as important elements of online exams, as was the e‐invigilation, which students perceived as efficient and non‐intrusive.
Geological evolution of the Hampshire Basin (southern England) during a global climate transition from ‘hothouse’ to ‘coolhouse’ in the Palaeogene
Authors: Barnet James
Published: March 2023

Palaeogene sediments of the Hampshire Basin were a sensitive recorder of fluctuations in climate and eustatic sea level as Earth's climate transitioned from the global early Eocene ‘hothouse’ to the early Oligocene ‘coolhouse’, accompanied by the first permanent continent‐scale glaciation of Antarctica at the Eocene/Oligocene boundary. A study of the Palaeogene sediments of the Hampshire Basin is not only interesting from a palaeoclimate perspective, but the marine middle Eocene formations are renowned for containing some of the most abundant and diverse Palaeogene fossil assemblages in the world. In this article, I take you on a tour of the geological evolution of the Hampshire Basin from the end of the Paleocene through to the Pleistocene. I highlight some of the best exposures where sediments can be studied at outcrop and representative fossil assemblages can be collected, along with the economic and archaeological significance of these Palaeogene sediments.
Defrocking the false father of the ‘Driftless Area’, USA
Authors: Brick Greg
Published: March 2023

The Driftless Area is a designation popular in American promotional tourist literature for an area in four contiguous American states, Minnesota, Wisconsin, Iowa and Illinois, that were not glaciated during the latest ice advance. Geographer Lawrence Martin published several articles asserting that geologist William H. Keating first discovered this area in 1823, an error that has crept into subsequent accounts. But historical evidence goes to show that three geologists, Roland D. Irving, Newton H. Winchell and Thomas C. Chamberlin, were simultaneous originators of the concept as we understand it today, about the year 1877.
Comparative Green Advantage: Growth Regimes and Public Investment in Renewable Energy R&D
Authors: Driscoll Daniel
Published: March 2023

Many consider research and development (R&D) a crucial pillar of decarbonization, yet few have investigated what actually drives investment. What drives public investment in renewable energy R&D in wealthy democracies? Using OECD data, this research note tests a number of hypotheses from the literature and finds that public investment in renewable energy R&D is most closely associated with growth regimes and their related characteristics. Furthermore, the ‘most invested’ are dynamic services export‐led growth regimes who are deindustrializing and moving towards knowledge‐based sectors like information and communications technology and finance. In short, economies investing the most in renewable energy R&D have the least structurally carbon‐intensive growth regime. As international economic integration locks many countries into specific path‐dependent roles, these findings suggest that there is a comparative advantage to the green transition. It concludes with a discussion of the asymmetric green capacities between core and periphery countries in the European Union.
Emotional worlds colliding: A qualitative exploration of the emotional experiences of transgender and cisgender women in romantic relationships during transition
Authors: Smithee Lauren , Few‐Demo April
Published: March 2023

Relationships in which one partner is transgender are often more complex compared to other LGBQ+ couples, due to the ways in which gender transition prompts changes for each partner and their relationship. Despite the impact of transition on both partners, the relationships of transgender people have been underresearched. This study was guided by symbolic interactionism to explore how transgender and cisgender women in romantic relationships experienced their relationship during their transition process. Constructivist grounded theory was used to analyze interviews with 20 transgender and cisgender participants using group‐level analysis. Both groups described their journeys in terms of emotional tensions that ebbed and flowed across time. Participants reflected on how they experienced tensions internally and within their relationships as they worked through change and created meaning from their experiences. Recommendations for research and clinical work are provided, in light of these findings.
Wildfire risk, salience, and housing development in the wildland–urban interface
Authors: Black Katie Jo , Irwin Nicholas B. , McCoy Shawn J.
Published: March 2023

As wildfires increase in both severity and frequency, understanding the role of risk saliency on human behaviors in the face of fire risks becomes paramount. While research has shown that homebuyers capitalize wildfire risk following a fire, studies of the role that risk saliency plays on residential development is limited. This paper aims to fill this gap by studying the link between wildfire risk saliency and the rate of residential development in wildfire‐prone areas, by treating recent wildfires as conditionally exogenous shocks to saliency. Using geospatial data on residential development in Colorado, we show that saliency shocks due to wildfire lead to statistically significant reductions in the rate of new development in wildfire risk zones that last upwards of 5 years, a result that is robust to a number of alternative explanations. We explore the policy implications of these findings, noting that education on fire risks may curtail some but not all of the development in these high wildfire‐risk areas due to the rapid growth of development in these regions.
Math Is Not a Universal Language: Supporting Middle School Students with Learning Disabilities Using Explicit Vocabulary Instruction in Mathematics Classrooms
Authors: Peeples Katherine N. , Kroesch Allison M. , VanUitert Victoria J.
Published: March 2023

Middle school students with learning disabilities often struggle with reading and literacy skills, including vocabulary, and require support in content‐area classes such as mathematics where weak vocabulary knowledge can negatively affect learning, achievement, and deep understanding. However, in general, middle school mathematics teachers do not receive training in literacy instruction, much less in explicit vocabulary instruction. Additionally, relatively few studies have examined content‐area vocabulary instruction at the middle or secondary school level. This study addressed these gaps in the research by examining the effect of a performance feedback and coaching intervention on middle school mathematics teachers’ use of explicit mathematics vocabulary instruction. Results of the study indicate that performance feedback and coaching had moderately positive effects on teachers’ use and quality of explicit mathematics vocabulary instruction.
Product design with attribute dependence
Authors: Novo‐Peteiro José A.
Published: March 2023

This paper studies how product design and pricing strategies are affected by the existing relationship between the characteristics that integrate the product. The analysis shows that complementarity and low substitutability encourage the provision of quality incorporated to the products and increase the quality distortion and cannibalization problems that are common in segmented markets. A two‐product strategy with a common attribute is shown to be a feasible strategy for reasons other than cost savings, namely attribute dependence. In addition, menu pricing is found to be the most profitable strategy, and a commonality strategy is more profitable than a common‐product strategy.
Comparing the impact of Joe Biden and Donald Trump on popular attitudes toward their parties
Authors: Jacobson Gary C.
Published: March 2023

This article extends the analysis of how presidents influence popular beliefs and feelings about their parties to include Donald Trump's full term and the first 2 years of Joe Biden's presidency. The results from examination of hundreds of surveys confirm that both presidents, like their predecessors, have strongly influenced evaluations of their parties generally and of their congressional wings specifically. They have also had a powerful impact on assessments of their party's competence in dealing with the COVID‐19 pandemic and on voters' preferences in their midterm election. For the most part, Trump's impact has been notably greater than Biden's, whose influence generally matches that of earlier presidents. Trump also stands out as having a larger and more consistent impact on opinions of the opposition, and he is exceptional in continuing to influence his party's reputation and standing after leaving office.
The convergence of culture, technology and context: A pathway to reducing Mathophobia and improving achievement in mathematics
Authors: Oladejo Adekunle I. , Olateju Taibat T. , Okebukola Peter A. , Agboluaje Taiwo M. , Sanni Rasheed , Shabani Juma , Akinola Victor O. , Ebisin Aderonke
Published: March 2023

This study explored the potency of CTCA in reducing math anxiety and promoting meaningful learning of mathematics among secondary school students. The study adopted a mixed‐method (explanatory sequential) design involving a quasi‐experimental design and individual in‐depth interviews. Participants were drawn from two schools, purposively selected within Lagos state educational district V. Three instruments: Set Theory Achievement Test, Math Anxiety Scale and Students' Perception about CTCA Interview Guide were used to collect the quantitative and qualitative data subsequently. The experimental group (102 students) was taught using the culturo‐techno‐contextual approach while the control group (106 students) was taught with the traditional lecture method. Treatment lasted six weeks after which posttest and retention test (four weeks after posttest) were conducted. MANCOVA was used to analyze the quantitative data. The results obtained suggest that CTCA reduces math anxiety and enhanced learning achievement [Pillai's Trace = 0.34 (F = 53.09; p<0.01)] more effectively than the traditional teaching method. No significant gender difference was also found in the achievement of the experimental group. Students' perception about the use of CTCA was generally positive. Within the scope and limitations of the study, it was recommended that CTCA should be adopted by secondary school teachers in teaching mathematics concepts.
Interobserver agreement of lateral and oblique radiography and standing cone beam CT of the caudal cervical articular process joints of horses
Authors: Brown Kara A. , Davidson Elizabeth J. , Johnson Amy L. , Stefanovski Darko , Wulster Kathryn B. , Ortved Kyla
Published: March 2023

Caudal cervical articular process joint osteoarthritis (CAPJ OA) leads to career‐altering clinical signs in the horse. Oblique radiographs and standing cone beam computed tomography (CBCT) facilitate the assessment of this area, however, the variability of interpretation of these images is currently unknown. This retrospective, secondary analysis, methods comparison study investigated interobserver agreement between clinicians and modality in grades of CAPJ OA on lateral and oblique radiographs and CBCT. We hypothesized that agreement between clinicians’ grades of CAPJ OA would be lowest for oblique radiographs and highest for CBCT, and agreement between grades of CAPJ OA would be low for all pairs of modalities. Horses underwent lateral and oblique radiography and CBCT of the CAPJs of C5‐C6 and C6‐C7. Radiographs and CBCT images were graded retrospectively by four blinded clinicians using 3‐point scales. Cohen's kappa analysis was used to evaluate interobserver agreement between grades of CAPJ OA, and agreement between grades of CAPJ OA between different modalities was explored using kappa‐weighted analysis. Agreement between clinicians’ grades of CAPJ OA was moderate for lateral radiographs (0.49), and fair for oblique radiographs (0.23) and CBCT (0.36). For all modalities, agreement was slight to fair between clinicians for CAPJs with grade 1 (normal, 0.21–0.32) or 2 (mild, 0.13–0.36) CAPJ OA, and moderate to substantial for grade 3 (moderate to severe, 0.45–0.77) CAPJ OA. Agreement between grades of CAPJ OA was fair for all pairs of modalities. This study provides important information regarding the inconsistency of interpretation of mild CAPJ OA on radiographs and CBCT amongst clinicians.
Medical Device Hybrid Manufacturing: Translating the Coordinate System From Metal Additive Manufacturing to Subtractive Post-Processing
Authors: Suriano Justin T. , Tafuni Angelantonio , Mullen Lewis , Racanelli Joseph , Tarantino Robert , Lieber Samuel C.
Published: March 2023

Additive manufacturing (AM) has transformed not only how parts can be realized but also their design. Metal additive manufacturing (MAM) has increased AM’s utility toward the manufacture of functional products. This has been seen in several industries including medical device, aerospace, and the automotive industries. The main limitation of MAM continues to be the part dimensional tolerances that can be achieved, and the respective surface finish produced. Hybrid manufacturing processes have been used to address these limitations; however, there remain challenges of how to translate the component’s coordinate system from AM to subtractive post-processes. This paper explores this topic through a medical device case study. A translatable coordinate system was produced by first designing features to serve as a datum reference frame (DRF). These features were introduced by MAM and then finalized with wire-electrical discharge machining (EDM). The produced DRF features successfully prepared the component for translation from the MAM to subtractive post-process. The completed medical device component met the expected requirements with a less than 1% difference on key part nominal dimensions. In addition, the hybrid process exhibited a potential for sustainable manufacturing with a buy-to-fly ratio of 6:1. The study demonstrated that a coordinate system can be translated effectively in hybrid manufacturing by designing part features informed by both AM and wire-EDM processes.
Non-Smooth Dynamics of Tapping Mode Atomic Force Microscopy
Authors: Belardinelli Pierpaolo , Chandrashekar Abhilash , Alijani Farbod , Lenci Stefano
Published: March 2023

This study examines the nonlinear dynamics in tapping-mode atomic force microscopy (AFM) with tip-surface interactions that include van der Waals and Derjaguin-Müller-Toporov contact forces. We investigate the periodic solutions of the hybrid system by performing numerical pseudo-arclength continuation. Through the use of bifurcation locus maps in the set of parameters of the discontinuous model, the overall dynamical response scenario is assessed. We demonstrate the influence of various dissipation mechanisms that are related with the AFM touching or lacking contact with the sample. Local and global analyses are used to investigate the stability of the stable solution in the repulsive regime. The impacting nonsmooth dynamics framed within a higher-mode Galerkin discretization is able to capture windows of irregular and complex motion.
Harmonic Method for Simulating Unsteady Multispool Interactions
Authors: Wang Feng , di Mare Luca
Published: March 2023

Modern civil jet engines arrange components on spools with different rotational speeds in order to improve compressor stall margin, overall engine performance, etc. The unsteady interactions among these components can be significant and should be considered at an early design stage if possible. Unsteady Reynolds-averaged Navier–Stokes (URANS) is a common approach to simulate these unsteady effects, but the disparity in time scales in a multispool simulation can lead to expensive URANS simulations. Harmonic methods are effective and efficient approaches to simulate unsteady interactions among turbomachinery components, but their applications to multispool simulations remain a challenge. The objective of this paper is to address this challenge. This paper extends the Favre-averaged non-linear harmonic method to simulate multispool turbomachinery components using a unified bladerow interface which transfers disturbances through bladerows with arbitrary blade counts at any rotational speed. The regularization of non-reflective boundary condition is described for certain circumferential wave number of the zero-frequency mode. The capability of the proposed approach is demonstrated by simulating the transfer of hot streaks through full 3D high- and intermediate-pressure turbines in a three-shaft engine. The temperature distributions from the harmonic method show good agreement with direct unsteady simulation in terms of the mean flow and the instantaneous flow. The radial migration of the hot streaks towards the hub are captured very well by the proposed harmonic method. The required wall-clock time of the harmonic method is roughly 240 times smaller than the whole annulus URANS simulation. This demonstrates that the proposed method can be an efficient design tool to trace hot streaks in multispool turbines at the early design stage.
Development of One-Part Rock-Based Geopolymers for Downhole Cementing Applications
Authors: Omran Mohamed , Khalifeh Mahmoud
Published: March 2023

The use of geopolymers as a full replacement for cement in oil well cementing applications requires the development of not only environmentally friendly but also user-friendly cementitious materials. This study aims to investigate the early-age mechanical and chemical properties of synthesized one-part geopolymers, which are heat-cured rock-based products. These geopolymers were synthesized from granite-based precursors and were activated by solid powders of potassium silicate, with a small portion of potassium hydroxide (KOH) as an accelerator to enhance the setting time and early strength. The mechanical and chemical properties of the one-part geopolymers were characterized, and the mineralogy of the solidified samples was analyzed through crystallography to better understand their microstructure. The study found that the investigated one-part geopolymer mixes, which were activated by a solid activator with a modulus ratio of 2.4, developed acceptable compressive strength of around 7 to 13 MPa within 24 h and up to 7 days. The use of one-part geopolymers has the potential to provide environmentally- and user-friendly slurries that can facilitate their utilization for large-scale in-situ applications in the petroleum and civil engineering sectors.
Experimental Study on the Effect of Off-Sized Rollers on the Dynamic Load Distribution in a Cylindrical Roller Bearing
Authors: Hou Yu , Wang Xi , Li Xingyu , Guo Rubing , Li Junqiang , Li Qiang
Published: March 2023

The differences in the roller diameters within a roller bearing are unavoidable in practice, which is known as the off-sized effect. The off-sized effect results in the dynamic variation of the load distribution in bearings and further the abnormal vibration and premature failure of bearings. This paper experimentally investigates the effect of off-sized rollers on the dynamic load distribution in a cylindrical roller bearing. Different configurations of off-sized rollers are given considering the oversized and undersized roller conditions, and the number and position of off-sized rollers. The real-time roller-raceway contact loads distributed in the bearing are measured under these test cases. The results show that a single off-sized roller leads to the loading change directly on itself and further the load rebalances among the adjacent rollers. Under the conditions of multiple off-sized rollers, a stack effect of the competition rule of roller loading dominates the variation range of the dynamic load distribution. As results of the stack effect, among all roller configurations, the configuration of multiple off-sized rollers adjacent to each other leads to the minimum range of the dynamic load distribution, while the configuration of two off-sized rollers separated by a regular roller leads to the maximum one.
Contactless Evaluation of Stress in Anisotropic Metallic Plates Using Nonlinear Electromagnetic Acoustic Resonance Technique
Authors: Li Weibin , Hu Yi , Shi Tianze , Deng Mingxi
Published: March 2023

In this paper, a contactless nonlinear acoustic method is developed for the evaluation of stress states in anisotropic metallic plates by a combination of electromagnetic acoustic resonance (EMAR) technique and higher harmonic generation. Electromagnetic transducers (EMATs) designed and applied for exciting and receiving ultrasonic signals can maintain the coupling condition consistently on the measure of higher harmonics generated. EMAR provides a sufficient magnitude of signals for higher harmonics generated. In addition, the conventional EMAR technique based on the measurement of shear-wave velocity and attenuation within a certain frequency range is also carried out in the specimens. The effect of stress on the higher harmonic generation is explored and discussed. It is found that nonlinear parameters measured by the nonlinear EMAR method change significantly versus the increase of external tension stress loadings, whereas the variations of linear acoustic parameters measured are negligible. In addition, the obtained results clearly indicate that the variation of the measured acoustic nonlinear parameters versus external stresses is direction-depended in anisotropic materials. The contactless nonlinear acoustic technique combines the feature of EMAR with the merit of higher harmonic generation, providing an effective means for stress evaluation in weakly anisotropic materials with improved reliability and sensitivity over linear ones.
Supplemental Material: Early Cretaceous (Late Barremian–Early Albian) expanding aeolian activity in East Asia: evidence from the stratigraphic evolution of aeolian deposition in the Baiyin-Jingyuan Basin, northern China
Authors: Wang Fei , et al.
Published: March 2023

Field photos of three sections, a–a′, b–b′, c–c′, of Hekou Group in the 8 Baiyin-Jingyuan Basin.
Paradoxical embolisation to the brain in right-sided infective endocarditis and patent foramen ovale in a pregnant woman
Authors: Tackett Madison S , Ahmed Taimoor , El-Dalati Sami A , Ahmed Taha
Published: March 2023

The incidence of infective endocarditis in pregnancy has increased as a result of the opioid epidemic. Right-sided infective endocarditis (RSIE), specifically tricuspid valve endocarditis, is more commonly linked to injection drug use. In pregnant patients, a prompt diagnosis and treatment of infective endocarditis are crucial to prevent fetal and maternal morbidity and mortality. Complications associated with infective endocarditis in pregnancy include death, preterm labour and embolic disease. RSIE is classically linked to septic pulmonary emboli; however, we report a unique case of a pregnant patient with known tricuspid valve infective endocarditis. Our patient unfortunately developed an ischaemic stroke from paradoxical brain embolisation in the setting of a previously undiagnosed patient foramen ovale. Furthermore, we demonstrate the importance of considering how normal cardiac physiological changes associated with pregnancy can impact the clinical course in patients with RSIE.