bluuebunny/crossref_metadata_2025_split huggingface dataset:
Vorticity dynamics diagnosis of the internal flow field in a high-load counter-rotating compressor
Authors: Yan T. , Chen H. , Yan P. 
Published: May 2023

AbstractA high-load counter-rotating compressor is optimised based on the method of coupling aerodynamic optimisation technology and computational fluid dynamics, and the flow structures in the passage are analysed and evaluated by vorticity dynamics diagnosis. The results show that the aerodynamic performance of optimised compressor are obviously improved at both design point and off-design point. By comparing the distribution characteristics of vorticity dynamics parameters on the blade surface before and after the optimisation, it is found that BVF (boundary vorticity flux) and circumferential vorticity can effectively capture high flow loss regions such as shock waves and secondary flow in the passage. In addition, the BEF (Boundary enstrophy flux) diagnosis method based on the theory of boundary enstrophy flux is developed, which expands the application scenario of the boundary vorticity dynamics diagnosis method. The change of vorticity dynamics parameters shows blade geometric parameters’ influence on the passage’s viscous flow field, which provides a theoretical basis for the aerodynamic optimisation design.
Firn aquifer water discharges into crevasses across Southeast Greenland
Authors: Cicero Eric , Poinar Kristin , Jones-Ivey Renette , Petty Alek A. , Sperhac Jeanette M. , Patra Abani , Briner Jason P. 
Published: May 2023

AbstractIn Southeast Greenland, summer melt and high winter snowfall rates give rise to firn aquifers: vast stores of meltwater buried beneath the ice-sheet surface. Previous detailed studies of a single Greenland firn aquifer site suggest that the water drains into crevasses, but this is not known at a regional scale. We develop and use a tool in Ghub, an online gateway of shared datasets, tools and supercomputing resources for glaciology, to identify crevasses from elevation data collected by NASA's Airborne Topographic Mapper across 29000 km2of Southeast Greenland. We find crevasses within 3 km of the previously mapped downglacier boundary of the firn aquifer at 20 of 25 flightline crossings. Our data suggest that crevasses widen until they reach the downglacier boundary of the firn aquifer, implying that crevasses collect firn-aquifer water, but we did not find this trend with statistical significance. The median crevasse width, 27 meters, implies an aspect ratio consistent with the crevasses reaching the bed. Our results support the idea that most water in Southeast Greenland firn aquifers drains through crevasses. Less common fates are discharge at the ice-sheet surface (3 of 25 sites) and refreezing at the aquifer bottom (1 of 25 sites).
Economic Shocks and the Development of Immigration Attitudes
Authors: Laaker Dillon 
Published: May 2023

AbstractHow do immigration attitudes form? Drawing on the political socialization literature, I argue that growing up in a recession causes a lasting increase in anti-immigration attitudes. I delineate two mechanisms that emphasize the negative consequences of recessions for young workers and the anti-immigration narrative that often emerges during economic turmoil. Young adults are particularly vulnerable to these external shocks because they have minimal political experience and are developing their core political attitudes. Support is provided for this argument with evidence from the European Social Survey. An economic shock during young adulthood causes a significant increase in anti-immigration attitudes, a relationship not found for other ages. I find tentative evidence that growing up in a recession has a larger effect on the racial and cultural dimensions of immigration and causes a broader sociotropic response. Results highlight how economic crises affect the socialization of young adults and underscore their lasting political consequences.
Improved models for the relationship between age and the probability of trypanosome infection in female tsetse, Glossina pallidipes Austen
Authors: Hargrove J. W. , Van Sickle J. 
Published: May 2023

AbstractBetween 1990 and 1999, at Rekomitjie Research Station, Zambezi Valley, Zimbabwe, 29,360 female G. pallidipes were dissected to determine their ovarian category and trypanosome infection status. Overall prevalences were 3.45 and 2.66% for T. vivax and T. congolense, respectively, declining during each year as temperatures increased from July – December. Fits to age-prevalence data using Susceptible-Exposed-Infective (SEI) and SI compartmental models were statistically better than those obtained using a published catalytic model, which made the unrealistic assumption that no female tsetse survived more than seven ovulations. The improved models require knowledge of fly mortality, estimated separately from ovarian category distributions. Infection rates were not significantly higher for T. vivax than for T. congolense. For T. congolense in field-sampled female G. pallidipes, we found no statistical support for a model where the force of infection was higher at the first feed than subsequently. The long survival of adult female tsetse, combined with feeding at intervals ≤3 days, ensures that post-teneral feeds, rather than the first feed, play the dominant role in the epidemiology of T. congolense infections in G. pallidipes. This is supported by estimates that only about 3% of wild hosts at Rekomitjie were harbouring sufficient T. congolense to ensure that tsetse feeding off them take an infected meal, so that the probability of ingesting an infected meal is low at every meal.
Paleo-trade wind directions over the Yangtze Carbonate Platform during the Cambrian–Ordovician, Southern China
Authors: Hu Chenlin , Qin Tianyou , Ma Jinghui , Han Changcheng , Wang Xuliang 
Published: May 2023

AbstractThe Sichuan Basin was a part of the Yangtze Carbonate Platform (YCP) during the Cambrian–Ordovician, and marine carbonates were deposited in the basin during this interval. Although previous studies have evaluated the paleogeography, paleoclimate and paleoecology of this basin, they have primarily focused on the paleoecology and biological evolution in the basin; however, analysis of paleogeography and paleoclimate is lacking. This study integrated outcrop sedimentological and magnetic fabric data to document sedimentary differentiation and anisotropy of magnetic susceptibility (AMS) within the YCP. The aims of this study were to infer paleowind directions during each epoch of the Cambrian–Ordovician and to constrain the paleogeographic location of the YCP. The northwestern, central and southeastern sides of the YCP were characterized by high-energy deposition (e.g. sub-angular to rounded intraclasts), medium-energy deposition (e.g. sub-angular to sub-rounded intraclasts) and low-energy deposition (e.g. angular to sub-angular intraclasts), respectively. The centroid D-Kmaxvalues for the Early, Middle and Late Cambrian were 116° ± 52°, 145° ± 57° and 159° ± 62° from the present north, respectively; corresponding values for the Early, Middle and Late Ordovician were 169° ± 70°, 139° ± 73° and 91° ± 68° from the present north, respectively. Sedimentary differentiation and AMS results indicated that the prevailing wind directions during the Early Cambrian, Middle Cambrian, Late Cambrian, Early Ordovician, Middle Ordovician and Late Ordovician were 296° ± 52°, 325° ± 57°, 339° ± 62°, 349° ± 70°, 319° ± 73° and 271° ± 68° from the present north, respectively. The present study provides evidence for the location of the YCP during the Cambrian–Ordovician via the correspondence between the paleowind directions over the YCP and the trade winds in the Northern and Southern hemispheres. The novelty of this study lies in the following aspects: (1) it integrates microfacies and AMS analyses to establish paleowind patterns; (2) it constrains the paleo-hemispheric location of the YCP during the Cambrian–Ordovician; and (3) it provides a reference for further studies of the paleoclimate and paleogeography of the YCP during the Cambrian–Ordovician.
Why do women abort their pregnancies? Evidence from the National Family Health Survey (2019–21) of India
Authors: Saikia Daisy , Pradhan Manas Ranjan 
Published: May 2023

AbstractInduced abortion is closely associated with maternal morbidity, mortality, and reproductive rights of women and thus continues to draw research interest. This study assesses the reasons for abortion and their predictors using India’s National Family Health Survey-5 (2019–21) data. The sample of women aged 15–49 who had terminated their last pregnancy by induced abortion in the five years preceding the survey (n=5835) was considered for analysis. Multinomial logistic regression was used to check the adjusted effects of the socioeconomic predictors on the reasons for abortion. Stata (v16.0) was used for the data analysis. Women were more likely to abort their pregnancy at home/other than in the public health sector if unintended pregnancies (RR: 2.79; CI: 2.15–3.61) and sex-selective abortions (RR: 2.43; CI: 1.67–3.55) rather than life risk. The study found unintended pregnancy as the primary contributor to induced abortion. However, some women undergo the procedure due to medical reasons and the undesired gender of the unborn child. Unintended pregnancies that end in abortion are strongly correlated with gestational age, method of abortion, place of abortion, number of surviving children, religion, place of residence, and region. Again, there is a strong association between the sex-selective reason for abortion and the gestational age, method of abortion, place of abortion, number of surviving children, proper knowledge of the ovulatory cycle, religion, wealth quintile, and region. Women had abortions mainly due to unintended pregnancies, and there was socioeconomic, demographic, and geographic variation in the reasons for abortion in India. Sex-selective abortions continue to exist, especially among women of higher parity, poorest households and from the central, eastern, and north-eastern regions. The key to reducing unintended pregnancies and abortions is raising the understanding of contraception and empowering women in reproductive decisions. Reducing unintended pregnancies will contribute to lower induced abortion and thus improve women’s health.
Delayed extensive surgical emphysema after Valsalva manoeuvre post Eustachian tuboplasty
Authors: Hussain S Z M , Hashmi S , Qayyum A 
Published: May 2023

AbstractObjectiveThis paper reports a case of balloon Eustachian tuboplasty with delayed presentation of extensive surgical emphysema.MethodsThis is a clinical case report with a review of literature.ResultsEustachian tube dysfunction is a functional disorder that results in inadequate middle-ear ventilation, causing aural fullness and tinnitus. A 36-year-old male presented with the sudden onset of an isolated, painful, left-sided neck swelling. The patient underwent balloon Eustachian tuboplasty, which was uneventful, but subsequently developed a sudden onset of isolated left-sided neck swelling on the 5th post-operative day during Valsalva manoeuvre. Neck examination revealed extensive crepitus on the left side of the neck. Examination findings were confirmed by imaging. The patient was conservatively managed and subsequently discharged home.ConclusionBalloon Eustachian tuboplasty is a safe procedure; however, extra care must be taken to avoid possible complications. Patients should be counselled against Valsalva manoeuvre and heavy weightlifting. They also should be instructed to sneeze with an open mouth and consider the use of stool softeners.
Olfactory recovery following omicron variant infection: a psychophysical prospective case–control study with six-month follow up
Authors: Vaira Luigi Angelo , Boscolo-Rizzo Paolo , Lechien Jerome R , Mayo-Yáñez Miguel , Petrocelli Marzia , Pistidda Laura , Salzano Giovanni , Maglitto Fabio , Hopkins Claire , De Riu Giacomo 
Published: May 2023

AbstractObjectiveThis study aimed to evaluate the recovery of olfactory function at six months in individuals infected with the coronavirus disease 2019 omicron variant, using psychophysical tests.MethodsA prospective case–control study that included severe acute respiratory syndrome coronavirus-2 patients infected in February and March 2022 was conducted. Patients underwent the Sniffin’ Sticks test within 10 days of infection and again after at least 6 months. The olfactory scores were compared with those of a control group.ResultsIn all, 102 patients and 120 controls were enrolled in the study. At baseline, 26 patients (25.5 per cent) self-reported smell loss. The median threshold, discrimination and identification score was 33.6 (interquartile range, 12.5) for the cases and 36.5 (interquartile range, 4.38) for the controls (p < 0.001). Based on the threshold, discrimination and identification scores, 12 controls and 34 patients reported olfactory dysfunction (p < 0.001). Eighty cases underwent re-evaluation at six months; the median threshold, discrimination and identification score was 37.1 (interquartile range, 4.75) with no significant differences compared with the controls.ConclusionSix months after infection, the prevalence of olfactory dysfunction in patients did not differ significantly from the control population.
Socio-demographic differences in access to psychological treatment services: evidence from a national cohort study
Authors: Sharland Emma , Rzepnicka Klaudia , Schneider Dorothee , Finning Katie , Pawelek Piotr , Saunders Rob , Nafilyan Vahé 
Published: May 2023

AbstractBackgroundSince 2008, the Improving Access to Psychological Therapies (IAPT) programme has offered adults in England evidence-based psychological treatments for common mental disorders (CMDs) such as depression and anxiety disorders. However, inequalities in access have not been explored at the national level.MethodsUsing a unique individual patient dataset that linked 2011 Census information of English residents to national IAPT data collected between April 2017 and March 2018, we estimated the rate of access by a wide range of socio-demographic characteristics that are not routinely available. A large household survey was used to estimate the prevalence of probable CMDs by these socio-demographic characteristics. We estimated the probability of access to IAPT amongst people with CMDs by comparing the rates of access from IAPT data and the estimates of prevalence of CMDs from the household survey. Both unadjusted and adjusted (for important patient characteristics) access rates were estimated in logistic regression models.ResultsAs a proportion of those with a probable CMD, access to IAPT varied markedly by socio-demographic characteristics. Older adults, males, people born outside of the UK, people with religious beliefs, people from Asian ethnic backgrounds, people reporting a disability and those without any academic or professional qualifications were underrepresented in IAPT services nationally, in adjusted models.ConclusionsThe identification of patients who may be underrepresented in IAPT provides an opportunity for services to target outreach and engagement with these groups. Further understanding of barriers to access should help increase equity in access.
Design of a torsional compliant mechanism with given discrete torque-deflection points for nonlinear stiffness elastic actuator
Authors: Ju Wenjie , Li Bingwei , Kang Rongjie , Zhang Songyuan , Song Zhibin 
Published: May 2023

AbstractOwing to inherent flexibility, compliant actuator with physical elastic elements can implement compliant interactions between robot and environment. Nonlinear stiffness elastic actuators (NSEAs) use one motor to adjust position and stiffness, which improve compactness of variable stiffness actuators, and consider high torque/force resolution and high bandwidth. The primary challenge of designing a NSEA is designing a reliable compliant mechanism with a given torque-deflection profile. In this study, a general design method of torsional compliant mechanism through given discrete torque-deflection points was proposed, where a chain algorithm based on 2R pseudo-rigid-body model was used to describe the large deformation in elastic elements. Moreover, the theoretical model of stiffness of a compliant mechanism based on series flexible beams was developed. Based on the proposed model, the dimensional parameters of proposed compliant mechanism were designed satisfying the condition of the given torque-deflection points. Finally, simulation and physical experiment of the designed compliant mechanism through three given torque-deflection points are conducted to show the effectiveness of the proposed method. The designed compliant mechanism was tested and evaluated in the self-developed NSEA.
Kaya forests: nucleus of cultural and biological diversity and functionality
Authors: Habel Jan Christian , Schultze-Gebhardt Kathrin , Shauri Halimu S. , Maarifa Ali M. , Maghenda Marianne , Fungomeli Maria , Teucher Mike 
Published: May 2023

Abstract
The Kaya forests in Southern Kenya are valuable habitats for rare animal and plant species and provide various ecosystem services. The Kaya forests are also centres of cultural life and are of great relevance to rites, traditions, and the social order of the community of people. During the past decades, these forest remnants become under extreme pressure due to land use and resource exploitation and are in danger of disappearing completely during the next years. This negative trend is progressing with the increasing population density. In addition, the relevance of the former cultural rites is increasingly being forgotten, and with it the relevance of these places. In order to preserve these forest remnants in the long term, it is important to make the population aware of the numerous and valuable ecosystem services, as well as to bring the former cultural life back into the centre of society. A general prerequisite to efficiently conserve Kayas might be the improvement of communication among generations, such as between the elders of Kayas and the youth, as well as among elders from different Kayas to harmonize conservation strategies and the sustainable use of these forest remnants. In addition, strengthening the communication between state institutions and the elders of the individual Kayas might help to find a common strategy to conserve Kaya forests.
The social field of international adjudication: Structures and practices of a conflictive professional universe
Authors: Soave Tommaso 
Published: May 2023

AbstractThe modern professional world of international adjudication bears little trace of the ‘invisible college’ theorized by Oscar Schachter 50 years go. Instead, it has become a social field marked by a fierce competition among actors possessing unequal skills and influence. Moving from these premises, this article unravels the socio-professional dynamics of the community of legal experts – judges, arbitrators, government agents, private counsel, court bureaucrats, specialized academics, etc. – dealing with the judicial settlement of international disputes on a daily basis. On the one hand, the community has developed a specific set of social structures, practices, and dispositions that distinguish it from the rest of the international legal profession and insulate its activities from outside interference. On the other, it is the site of an endless struggle among its participants, who deploy various forms of capital to consolidate their positions relative to one another. Having outlined the twofold structure of the community – externally autonomous and internally conflictive – the article reflects on how co-operation and competition affect the everyday unfolding of international judicial proceedings and the production of legal outcomes at the international level.
The dyadic effects of social support on anxiety among family members during COVID-19: The mediating role of perceived family resilience
Authors: Feng Li , Feng Jingyan , Li Xiaohui , An Yuanyuan 
Published: May 2023

AbstractFamilies have been suffering from huge financial loss and psychological distress due to the COVID-19 pandemic. Most existing studies investigated the protective factors for anxiety at the individual level, while understandings from the perspective of family dyadic level were left unknown. Considering that social support could serve as a protective factor to reduce anxiety both at individual level and at dyadic level, the present study adopted dyadic data analysis approach to tackle this puzzle. In total, 2512 Chinese parent–adolescent dyads completed a survey with scales of anxiety, social support, and perceived family resilience on July 31 and August 1 of 2021. Results showed that: (1) adolescents’ perceived social support had significant actor and partner effects on their own and parents’ anxiety, whereas parents’ perceived social support only had a significant actor effect on their own anxiety and (2) the actor mediating effects of social support on anxiety via one’s own perceived family resilience were found in both adolescents and parents, and a partner mediating effect of adolescents’ social support was significantly associated with parents’ anxiety through parents’ perceived family resilience. Findings emphasize that interventions aiming at increasing adolescents’ support resources could generate a significant effect on reducing anxiety.
A pair degree condition for Hamiltonian cycles in 3-uniform hypergraphs
Authors: Schülke Bjarne 
Published: May 2023

AbstractWe prove a new sufficient pair degree condition for tight Hamiltonian cycles in
$3$
-uniform hypergraphs that (asymptotically) improves the best known pair degree condition due to Rödl, Ruciński, and Szemerédi. For graphs, Chvátal characterised all those sequences of integers for which every pointwise larger (or equal) degree sequence guarantees the existence of a Hamiltonian cycle. A step towards Chvátal’s theorem was taken by Pósa, who improved on Dirac’s tight minimum degree condition for Hamiltonian cycles by showing that a certain weaker condition on the degree sequence of a graph already yields a Hamiltonian cycle.In this work, we take a similar step towards a full characterisation of all pair degree matrices that ensure the existence of tight Hamiltonian cycles in
$3$
-uniform hypergraphs by proving a
$3$
-uniform analogue of Pósa’s result. In particular, our result strengthens the asymptotic version of the result by Rödl, Ruciński, and Szemerédi.
A unique bizarre subtype of mixed total anomalous pulmonary venous connection
Authors: Öztürk Erkut , Bas Serap , Recep Berra Zümrün Tan , Tanıdır Ibrahim Cansaran , Hatemi Ali Can 
Published: May 2023

AbstractMixed total anomalous pulmonary venous connection is a rare CHD with a wide variation in pulmonary venous anatomy and drainage. We present a ten-day-old newborn with a rare bizarre subtype of mixed total anomalous pulmonary venous connection.
Neural networks for quantile claim amount estimation: a quantile regression approach
Authors: Laporta Alessandro G. , Levantesi Susanna , Petrella Lea 
Published: May 2023

AbstractIn this paper, we discuss the estimation of conditional quantiles of aggregate claim amounts for non-life insurance embedding the problem in a quantile regression framework using the neural network approach. As the first step, we consider the quantile regression neural networks (QRNN) procedure to compute quantiles for the insurance ratemaking framework. As the second step, we propose a new quantile regression combined actuarial neural network (Quantile-CANN) combining the traditional quantile regression approach with a QRNN. In both cases, we adopt a two-part model scheme where we fit a logistic regression to estimate the probability of positive claims and the QRNN model or the Quantile-CANN for the positive outcomes. Through a case study based on a health insurance dataset, we highlight the overall better performances of the proposed models with respect to the classical quantile regression one. We then use the estimated quantiles to calculate a loaded premium following the quantile premium principle, showing that the proposed models provide a better risk differentiation.