bluuebunny/crossref_metadata_2025_split huggingface dataset:
Almost Cosymplectic $$(k,\mu )$$-metrics as $$\eta$$-Ricci Solitons
Authors: Wang Wenjie 
Published: December 2021

AbstractIn this paper, we study $$\eta$$
η
-Ricci solitons on almost cosymplectic $$(k,\mu )$$

(
k
,
μ
)

-manifolds. As an application, it is proved that if an almost cosymplectic $$(k,\mu )$$

(
k
,
μ
)

-metric with $$k<0$$

k
<
0

represents a Ricci soliton, then the potential vector field of the Ricci soliton is a strict infinitesimal contact transformation, and the corresponding almost cosymplectic manifold is locally isometric to a Lie group whose local structure is determined completely by $$k<0$$

k
<
0

. In addition, a concrete example is constructed to illustrate the above result.
Changes in Frequency and Patterns of Marital Sexual Activity During COVID-19: Evidence from Longitudinal Data Prior to, During and After Lockdown in Singapore
Authors: Tan Poh Lin 
Published: December 2021

ABSTRACTBackgroundThe literature suggests that the pandemic has affected sexual activity and sexual desire around the world, potentially due to increased levels of stress, movement restrictions under lockdown conditions, and changes in relationship quality.AimTo investigate changes in frequency and patterns of marital sexual activity and the role of potential factors underlying these changes, during and after COVID-19 lockdown.MethodsThis longitudinal study followed 409 heterosexual married female participants who completed a baseline survey in April–July 2018 and biweekly online surveys over the next 14 weeks; an online survey in May 2020 during the lockdown in Singapore; and an online survey in June 2020 after the lockdown was lifted. Participants were recruited in 2018 using street intercept and screened for inclusion and exclusion criteria. Logistic fixed-effects models were used to test for changes in frequency and patterns of marital sexual activity and assess underlying factors. Pseudo-design-based sample weights were applied.OutcomesThe 2018 in-person baseline survey collected information on demographic characteristics and ideal frequency of marital sex, while follow-up online questionnaires in May–June 2020 included items on exact dates of marital sexual activity of previous weeks; stress and fatigue levels; both spouses’ stay-at-home statuses during lockdown; and marital satisfaction.Results409 heterosexual married women were included in this study. Compared to pre-pandemic levels, the proportion of participants not having marital sex within a week remained stable while weekly sexual frequency increased, with more evenly distributed sexual activity on weekdays and weekends. Stress, fatigue, and marital satisfaction levels predicted probability of non-activity and sexual frequency.Clinical TranslationThe increase in weekly sexual frequency has implications for sexual and reproductive health, including sexual satisfaction and prevalence of infertility and low birth weight associated with waiting time to pregnancy.Strengths & LimitationsThe longitudinal nature of the dataset provides unique insights into differences in frequency of marital sexual activity during compared to before the pandemic. Unlike previous studies, detailed data on exact dates of sexual activity allow for detection of differences in sexual activity by day of the week. However, dates of sexual activity were recorded retrospectively and may contain recall errors. Data were collected only from wives and hence dates of marital sexual activities were not cross-validated with husbands.ConclusionResults point to more active and flexible marital sex lives during the pandemic, with effects that persisted after the lockdown ended.
MEAN–VARIANCE INSURANCE DESIGN WITH COUNTERPARTY RISK AND INCENTIVE COMPATIBILITY
Authors: Boonen Tim J. , Jiang Wenjun 
Published: December 2021

AbstractThis paper studies the optimal insurance design from the perspective of an insured when there is possibility for the insurer to default on its promised indemnity. Default of the insurer leads to limited liability, and the promised indemnity is only partially recovered in case of a default. To alleviate the potential ex post moral hazard, an incentive compatibility condition is added to restrict the permissible indemnity function. Assuming that the premium is determined as a function of the expected coverage and under the mean–variance preference of the insured, we derive the explicit structure of the optimal indemnity function through the marginal indemnity function formulation of the problem. It is shown that the optimal indemnity function depends on the first and second order expectations of the random recovery rate conditioned on the realized insurable loss. The methodology and results in this article complement the literature regarding the optimal insurance subject to the default risk and provide new insights on problems of similar types.
Cost-effectiveness analysis of whole-genome sequencing during an outbreak of carbapenem-resistantAcinetobacter baumannii
Authors: Elliott Thomas M. , Harris Patrick N. , Roberts Leah W. , Doidge Michelle , Hurst Trish , Hajkowicz Krispin , Forde Brian , Paterson David L. , Gordon Louisa G. 
Published: December 2021

AbstractBackground:Whole-genome sequencing (WGS) shotgun metagenomics (metagenomics) attempts to sequence the entire genetic content straight from the sample. Diagnostic advantages lie in the ability to detect unsuspected, uncultivatable, or very slow-growing organisms.Objective:To evaluate the clinical and economic effects of using WGS and metagenomics for outbreak management in a large metropolitan hospital.Design:Cost-effectiveness study.Setting:Intensive care unit and burn unit of large metropolitan hospital.Patients:Simulated intensive care unit and burn unit patients.Methods:We built a complex simulation model to estimate pathogen transmission, associated hospital costs, and quality-adjusted life years (QALYs) during a 32-month outbreak of carbapenem-resistantAcinetobacter baumannii(CRAB). Model parameters were determined using microbiology surveillance data, genome sequencing results, hospital admission databases, and local clinical knowledge. The model was calibrated to the actual pathogen spread within the intensive care unit and burn unit (scenario 1) and compared with early use of WGS (scenario 2) and early use of WGS and metagenomics (scenario 3) to determine their respective cost-effectiveness. Sensitivity analyses were performed to address model uncertainty.Results:On average compared with scenario 1, scenario 2 resulted in 14 fewer patients with CRAB, 59 additional QALYs, and $75,099 cost savings. Scenario 3, compared with scenario 1, resulted in 18 fewer patients with CRAB, 74 additional QALYs, and $93,822 in hospital cost savings. The likelihoods that scenario 2 and scenario 3 were cost-effective were 57% and 60%, respectively.Conclusions:The use of WGS and metagenomics in infection control processes were predicted to produce favorable economic and clinical outcomes.
Hospital mattress failures—A hidden patient danger
Authors: Hooker Edmond A. 
Published: December 2021

AbstractThe objective of the research was to assess the condition of beds and mattresses in 4 US hospitals. In total, 727 beds and mattresses were evaluated, and 523 (72%) had damage: 340 (47%) required mattress cover replacement and 183 (25%) required replacement of the entire mattress.
Correlates of vocational outcomes of youth with co-occurring mental illness and substance use disorders: Evidence from a vocational rehabilitation program
Authors: Akinola Olayemi A. , Horsman Euchay Ngozi , Dunkley Lisa 
Published: December 2021

AbstractYouth with co-occurring mental illness and substance use disorders are at higher risk for vocational rehabilitation exclusion. This study aimed to (a) explore the personal factors associated with vocational outcomes of youth with co-occurring mental illness and substance use disorders and (b) highlight services that have shown the greatest promise for this population in the state-federal rehabilitation program in the United States. Our analytic sample was extracted from the Rehabilitation Services Administration’s Case Service Report data set for 2013, 2014, and 2015 fiscal years. Multiple regression analyses results identified personal factors such as gender, race/ethnicity, level of education, and severity of disability as predictors of the achievement of competitive employment, hours worked, and income. The receipt of vocational rehabilitation services such as job search support, job placement assistance, vocational training, and on-the-job support are significantly associated with the achievement of competitive employment, higher work hours, and income. These finding have implications for vocational rehabilitation practice as they highlight who is at higher risk for poor outcomes, effective services, and additional factors to consider when working with youth with co-occurring mental illness and substance use disorders.
A novel statistical method predicts mutability of the genomic segments of the SARS-CoV-2 virus
Authors: Darooneh Amir Hossein , Przedborski Michelle , Kohandel Mohammad 
Published: December 2021

AbstractThe SARS-CoV-2 virus has made the largest pandemic of the 21st century, with hundreds of millions of cases and tens of millions of fatalities. Scientists all around the world are racing to develop vaccines and new pharmaceuticals to overcome the pandemic and offer effective treatments for COVID-19 disease. Consequently, there is an essential need to better understand how the pathogenesis of SARS-CoV-2 is affected by viral mutations and to determine the conserved segments in the viral genome that can serve as stable targets for novel therapeutics. Here, we introduce a text-mining method to estimate the mutability of genomic segments directly from a reference (ancestral) whole genome sequence. The method relies on calculating the importance of genomic segments based on their spatial distribution and frequency over the whole genome. To validate our approach, we perform a large-scale analysis of the viral mutations in nearly 80,000 publicly available SARS-CoV-2 predecessor whole genome sequences and show that these results are highly correlated with the segments predicted by the statistical method used for keyword detection. Importantly, these correlations are found to hold at the codon and gene levels, as well as for gene coding regions. Using the text-mining method, we further identify codon sequences that are potential candidates for siRNA-based antiviral drugs. Significantly, one of the candidates identified in this work corresponds to the first seven codons of an epitope of the spike glycoprotein, which is the only SARS-CoV-2 immunogenic peptide without a match to a human protein.
Novel SNPs and haplotypes identified in theCD4gene and their influence on deregressed MACE EBV indexes of milk-related traits in Simmental breed
Authors: Napolitano Francesco , Grandoni Francesco , De Matteis Giovanna , Degano Lorenzo , Vicario Daniele , Buttazzoni Luca 
Published: December 2021

AbstractCluster of differentiation 4 (CD4) is the accessory protein non-covalently bound to the T cell receptor that recognizes an invariant region of MHC class II on antigen presenting cells. Its cytoplasmic tail, physically associated with a protein tyrosine kinase, is important in the activation of helper/inducer T lymphocytes. InBos taurus,CD4gene is located on chromosome 5 from which two isoforms are transcribed, with a different number of amino acids due to splicing of exon 7 and variation in the reading frame. The aim of this study was to investigate the sequence of the entireCD4gene in Simmental sires to evaluate the effects of genomic variants on the indexes of the bulls for milk, fat and protein yields, as well as somatic cell score. The associations among genomic variants and indexes were analysed using the Allele and GLM procedures of SAS 9.4. The analysis indicated that only four of the thirty-one identified SNPs influenced the considered traits. Identified variants insist on coding zones and intronic sequences, where we revealed the presence of sites for transcription factors. To evaluate the existence of haplotypic effects, combinations among the four genomic variants (SNP 3, SNP 8, SNP 11 and SNP 19) were investigated. Six different haplotypic alleles were identified, but only four of them were frequent enough to allow for an evaluation of any haplotypic effect (at least six copies in the examined sample): Hap1, Hap2, Hap3 and Hap6. The analysis of associations between the selected haplotypes in theCD4gene with milk related indexes showed that bulls with Hap2 (T-A-C-C) had better indexes for milk and protein yields (P< 0.05), whereas the presence of the Hap1 haplotype (A-G-A-T) caused a significant decrease of the index for protein yield (P< 0.05). Frequencies of the two alleles Hap1 and Hap2 (9 and 36% respectively) make them of interest for their possible inclusion in breeding schemes and support the hypothesis of considering this gene as a candidate for the improvement of milk-related traits in the Simmental breed.
Amen to daat: on the foundations of Jewish epistemology
Authors: Lebens Samuel 
Published: December 2021

AbstractI argue that the Hebrew Bible adopts a non-doxastic account of propositional faith. In coming to this conclusion, we shall discover that Biblical Hebrew has no word for belief. What ramifications might this have had for biblical and Jewish epistemology? I begin to trace the sort of epistemic norms that might emerge from an epistemology that approaches knowledge by thinking about faith, rather than belief.
Childhood temperament as a predictor of adolescent nonsuicidal self-injury
Authors: Dale Kristina , Case Julia A.C. , Dyson Margaret W. , Klein Daniel N. , Olino Thomas M. 
Published: December 2021

AbstractPrevious cross-sectional work has consistently found associations between neuroticism and impulsivity and nonsuicidal self-injury (NSSI). However, there are few longitudinal studies of personality risk factors for NSSI. In this study, we examined associations between individual differences in temperament at age 3 and NSSI from ages 9 to 15. At age 3, 559 preschool-aged children (54% male; Mage = 42.2 months [SD = 3.10]) completed laboratory assessments of temperament. Parents also completed questionnaires about their child’s temperament. Children completed a diagnostic interview assessing NSSI engagement at ages 9, 12, and 15. By the age 15 assessment, 12.4% of adolescents reported engaging in NSSI. In univariate models, we found that higher levels of observed sadness and maternal-reported sadness and anger were associated with increased risk for NSSI. In multivariate models, female sex and maternal-reported anger were significantly associated with greater likelihood of NSSI. Laboratory observed sadness and impulsivity were associated with a higher likelihood of NSSI. This work extends the literature on personality risk factors associated with NSSI by finding longitudinal associations between early childhood negative affect and later NSSI engagement during adolescence.
Harpy Eagle Harpia harpyja nest activity patterns: Potential ecotourism and conservation opportunities in the Amazon Forest
Authors: MIRANDA EVERTON B. P. , KENUP CAIO F. , MUNN CHARLES A. , HUIZINGA NIKI , LORMAND NICKOLAS , DOWNS COLLEEN T. 
Published: December 2021

SummaryTourism can be a powerful tool for wildlife conservation if well controlled and responsibly managed. Apex predators constitute particularly attractive subjects for tourism, but simultaneously they may generate conflict with local communities. Harpy Eagles Harpia harpyja are the largest eagle species and are highly sought-after by ecotourists. The last stronghold of the Harpy Eagle is the Amazon Forest, which is being deforested for cattle ranching. We tested methods for developing Harpy Eagle ecotourism as a potential tool to harmonize these issues. Using camera traps, we collected data on timing of Harpy Eagle visits to their nests, as well as on probabilities of viewing an eagle. Harpy Eagles can only be seen predictably during the first 12 of the 30–36 month nest cycle. In nests with nestlings (up to 5–7 months), adults are visible on a daily basis, and this period lasts 16.6% of the nesting cycle, demanding a minimum of 13, 17, and 26 nests to have at least one nest with a nestling on 90%, 95% and 99% of the days. After this 5–7 month window, we found that two and 4.16 days spent at nests afforded high probabilities of sighting a fledgling or adult eagle, respectively. Harpy Eagles were mainly active at the beginning and the end of the day. Activity core lasted 6.5 decimal hours for adults, peaking at 10h00, and 7.45 decimal hours for fledged eagles, peaking at 15h00. Our results demonstrate that Harpy Eagles fit several criteria for a viable wildlife attraction: predictable in activity and location, viewable, and diurnal, even though at the same time they are considered a rarity. In a broader perspective, Harpy Eagle tourism shows every indication of being a significant tool for more robust rainforest conservation.
The role of psychological distress in the relationship between lifestyle and compulsivity: An analysis of independent, bi-national samples
Authors: Brierley Mary-Ellen E. , Albertella Lucy , Rotaru Kristian , Destree Louise , Thompson Emma M. , Liu Chang , Christensen Erynn , Lowe Amelia , Segrave Rebecca A. , Richardson Karyn E. , Kayayan Edouard , Chamberlain Samuel R. , Grant Jon E. , Lee Rico S. C. , Hughes Sam , Yücel Murat , Fontenelle Leonardo F. 
Published: December 2021

AbstractBackgroundPoor mental health is a state of psychological distress that is influenced by lifestyle factors such as sleep, diet, and physical activity. Compulsivity is a transdiagnostic phenotype cutting across a range of mental illnesses including obsessive–compulsive disorder, substance-related and addictive disorders, and is also influenced by lifestyle. Yet, how lifestyle relates to compulsivity is presently unknown, but important to understand to gain insights into individual differences in mental health. We assessed (a) the relationships between compulsivity and diet quality, sleep quality, and physical activity, and (b) whether psychological distress statistically contributes to these relationships.MethodsWe collected harmonized data on compulsivity, psychological distress, and lifestyle from two independent samples (Australian n = 880 and US n = 829). We used mediation analyses to investigate bidirectional relationships between compulsivity and lifestyle factors, and the role of psychological distress.ResultsHigher compulsivity was significantly related to poorer diet and sleep. Psychological distress statistically mediated the relationship between poorer sleep quality and higher compulsivity, and partially statistically mediated the relationship between poorer diet and higher compulsivity.ConclusionsLifestyle interventions in compulsivity may target psychological distress in the first instance, followed by sleep and diet quality. As psychological distress links aspects of lifestyle and compulsivity, focusing on mitigating and managing distress may offer a useful therapeutic approach to improve physical and mental health. Future research may focus on the specific sleep and diet patterns which may alter compulsivity over time to inform lifestyle targets for prevention and treatment of functionally impairing compulsive behaviors.
Ichthyosaurs from the Upper Triassic (Carnian–Norian) of the New Siberian Islands, Russian Arctic, and their implications for the evolution of the ichthyosaurian basicranium and vertebral column
Authors: ZVERKOV Nikolay G. , GRIGORIEV Dmitry V. , WOLNIEWICZ Andrzej S. , KONSTANTINOV Alexey G. , SOBOLEV Evgeny S. 
Published: December 2021

ABSTRACTThe first ichthyosaurian specimens discovered from the Upper Triassic of the Russian Arctic (Kotelny Island, New Siberian Islands) are described herein. They include the remains of large- to small-bodied ichthyosaurians originating from six stratigraphic levels spanning the lower Carnian to middle Norian. The material is mostly represented by isolated vertebrae and ribs, which are not possible to accurately diagnose, but also includes specimens comprising associated vertebrae and a fragmentary skeleton that preserves cranial remains (parabasisphenoid, fragmentary quadrate, partial mandible and hyoids). Based on vertebral and rib morphology, we identify the specimens as representatives of the following taxonomic groups: large-bodied shastasaurids, medium-sized indeterminate ichthyosaurians with a single rib facet in the presacral centra, and small euichthyosaurians with double rib facets present throughout the presacral vertebrae that likely represent toretocnemids and/or basal parvipelvians. In addition, the cranial and mandibular remains preserved in one of the specimens, ZIN PH 5/250, were studied using micro-computed tomography. Its mandible is highly similar to that of toretocnemids, whereas the parabasisphenoid demonstrates a peculiar combination of both plesiomorphic and derived character states, providing the first detailed data on this cranial element in a Late Triassic ichthyosaurian. Furthermore, the specimen also demonstrates a distinctive condition of rib articulation in the anteriormost presacral (cervical) vertebrae, which together with other features allows for the erection of a new taxon – Auroroborealia incognita gen. et sp. nov. Although the phylogenetic position of this taxon is uncertain due to its fragmentary nature, its anatomy, indicating toretocnemid or parvipelvian affinities, further supports the previously hypothesised sister-group relationships between these two clades. The morphology of the parabasisphenoid and vertebral column of the new taxon is discussed in broader contexts of the patterns of evolution of these skeletal regions in ichthyosaurs.
Revisiting ENSO and IOD Contributions to Australian Precipitation
Authors: Liguori Giovanni , McGregor Shayne , Singh Martin , Arblaster Julie , Di Lorenzo Emanuele 
Published: December 2021

AbstractTropical modes of variability, such as El Niño–Southern Oscillation (ENSO) and the Indian Ocean Dipole (IOD), exert a strong influence on the interannual variability of Australian precipitation. Nevertheless, commonly used indices of ENSO and IOD variability display significant co‐variability that prevents a robust quantification of the independent contribution of each mode to precipitation anomalies. This co‐variability issue is often addressed by statistically removing ENSO or IOD variability from the precipitation field before calculating teleconnection patterns. However, by performing a suite of coupled and uncoupled modeling experiments in which either ENSO or IOD variability is physically removed, we show that ENSO‐only‐driven precipitation patterns computed by statistically removing the IOD influence significantly underestimate the impact of ENSO on Australian precipitation variability. Inspired by this, we propose a conceptual model that allows one to effectively separate the contribution of each mode to Australian precipitation variability.
Anomalous Behavior of Zirconium and Hafnium in Volcanic Fumarolic Fluids
Authors: Censi P. , Zuddas P. , Caracausi A. , Sortino F. , Cangemi M. , Piazzese D. , Censi V. , Falcone E. 
Published: December 2021

AbstractThe Zirconium and Hafnium concentrations in worldwide fumaroles fed by magmatic fluids reveal that the Zr/Hf ratio is inversely related to the temperature of emission. Lower Zr/Hf ratio values below the chondritic signature are found in fluids having the highest temperature while super‐chondritic Zr/Hf ratio values are found in lower temperatures. Sub‐chondritic values of the Zr/Hf ratio may be related to larger volatility of Hf‐chloride gas species with respect to Zr‐Cl gas species, while super‐chondritic ratios may correspond to fluid‐rock processes resulting from cooling of uprising magmatic fluids. We propose that sub‐chondritic Zr/Hf ratio values in fumaroles associated with high temperature may be an appropriate marker of fast magmatic rising representing a new sensitive tool for volcanic risks strategies.