bluuebunny/crossref_metadata_2025_split huggingface dataset:
Steady Euler flows and Beltrami fields in high dimensions
Authors: CARDONA ROBERT 
Published: December 2020

AbstractUsing open books, we prove the existence of a non-vanishing steady solution to the Euler equations for some metric in every homotopy class of non-vanishing vector fields of any odd-dimensional manifold. As a corollary, any such field can be realized in an invariant submanifold of a contact Reeb field on a sphere of high dimension. The solutions constructed are geodesible and hence of Beltrami type, and can be modified to obtain chaotic fluids. We characterize Beltrami fields in odd dimensions and show that there always exist volume-preserving Beltrami fields which are neither geodesible nor Euler flows for any metric. This contrasts with the three-dimensional case, where every volume-preserving Beltrami field is a steady Euler flow for some metric. Finally, we construct a non-vanishing Beltrami field (which is not necessarily volume-preserving) without periodic orbits in every manifold of odd dimension greater than three.
Localizing virtual structure sheaves for almost perfect obstruction theories
Authors: Kiem Young-Hoon , Savvas Michail 
Published: December 2020

Abstract
Almost perfect obstruction theories were introduced in an earlier paper by the authors as the appropriate notion in order to define virtual structure sheaves and K-theoretic invariants for many moduli stacks of interest, including K-theoretic Donaldson-Thomas invariants of sheaves and complexes on Calabi-Yau threefolds. The construction of virtual structure sheaves is based on the K-theory and Gysin maps of sheaf stacks.

In this paper, we generalize the virtual torus localization and cosection localization formulas and their combination to the setting of almost perfect obstruction theory. To this end, we further investigate the K-theory of sheaf stacks and its functoriality properties. As applications of the localization formulas, we establish a K-theoretic wall-crossing formula for simple

$\mathbb{C} ^\ast $

-wall crossings and define K-theoretic invariants refining the Jiang-Thomas virtual signed Euler characteristics.
Hospital-acquired Clostridioides difficile infection among patients at an urban safety-net hospital in Philadelphia: Demographics, neighborhood deprivation, and the transferability of national statistics
Authors: Vader Daniel T. , Weldie Chelsea , Welles Seth L. , Kutzler Michele A. , Goldstein Neal D. 
Published: December 2020

AbstractObjective:To investigate associations between healthcare-associated Clostridioides difficile infection and patient demographics at an urban safety-net hospital and compare findings with national surveillance statistics.Methods:Study participants were selected using a case-control design using medical records collected between August 2014 and May 2018 at Hahnemann University Hospital in Philadelphia. Controls were frequency matched to cases by age and length of stay. Final sample included 170 cases and 324 controls. Neighborhood-level factors were measured using American Community Survey data. Multilevel models were used to examine infection by census tract, deprivation index, race/ethnicity, insurance type, referral location, antibiotic use, and proton-pump inhibitor use.Results:Patients on Medicare compared to private insurance had 2.04 times (95% CI, 1.31–3.20) the odds of infection after adjusting for all covariables. Prior antibiotic use (2.70; 95% CI, 1.64–4.46) was also associated with infection, but race or ethnicity and referral location were not. A smaller proportion of hospital cases occurred among white patients (25% vs 44%) and patients over the age of 65 (39% vs 56%) than expected based on national surveillance statistics.Conclusions:Medicare and antibiotics were associated with Clostridioides difficile infection, but evidence did not indicate association with race or ethnicity. This finding diverges from national data in that infection is higher among white people compared to nonwhite people. Furthermore, a greater proportion of hospital cases were aged <65 years than expected based on national data. National surveillance statistics on CDI may not be transportable to safety-net hospitals, which often disproportionately serve low-income, nonwhite patients.
Performance Effects of Internationalization: Contingency Theory Analysis of Russian Internationalized Firms
Authors: Dikova Desislava , Veselova Anna 
Published: December 2020

ABSTRACTThe relationship between internationalization and performance has attracted researchers’ attention for more than 40 years, producing contradictory results. Research on emerging-market (EM) multinationals’ performance has not added much clarity to the issue. Although contingency theory is widely applied in management research to explain superior organizational performance as a direct result of a ‘fit’ between structure, strategy, and environment, there has been little effort in extending the notion of strategy-structure-environment fit to include internationalization. We address this limitation by offering a comprehensive analysis of Russian internationalized firms’ performance, which reflects the complexity of strategic and structural changes that Russian firms make during internationalization. We use survey data on 213 predominantly private and mature firms to examine whether the alignment of a multitude of strategic and structural choices in a specific context matters for subsequent performance. We apply a fuzzy-set Qualitative Comparative Analysis (fsQCA) and find several distinct types of ‘fit’ that positively affect Russian internationalized firms’ performance.
THE HYPERELLIPTIC THETA MAP AND OSCULATING PROJECTIONS
Authors: BOLOGNESI MICHELE , VARGAS N. F. 
Published: December 2020

AbstractLet C be a hyperelliptic curve of genus
$g \geq 3$
. In this paper, we give a new geometric description of the theta map for moduli spaces of rank 2 semistable vector bundles on C with trivial determinant. In order to do this, we describe a fibration of (a birational model of) the moduli space, whose fibers are GIT quotients
$(\mathbb {P}^1)^{2g}//\text {PGL(2)}$
. Then, we identify the restriction of the theta map to these GIT quotients with some explicit degree 2 osculating projection. As a corollary of this construction, we obtain a birational inclusion of a fibration in Kummer
$(g-1)$
-varieties over
$\mathbb {P}^g$
inside the ramification locus of the theta map.
Value Shift: Immigration Attitudes and the Sociocultural Divide
Authors: Lancaster Caroline Marie 
Published: December 2020

AbstractThe sociocultural divide in Western Europe is increasingly focused on issues of national identity, namely immigration. It is commonly assumed that opponents of immigration also exhibit conservatism on other sociocultural issues. Yet recent research suggests that general social conservatism is declining in the region. Do immigration attitudes fit squarely into the sociocultural dimension? Using survey data from eleven West European countries, as well as a Dutch household panel from 2007–2019, this study finds that gender attitudes, a key sociocultural issue, are subject to change through both cohort and life cycle effects, while immigration attitudes are stable over the course of the panel and exhibit little variation across cohorts. Immigration attitudes also appear to be immune to period effects resulting from the 2015 refugee crisis. Further, those born during and after the ‘post-materialist revolution’ have weakened associations between these two attitudes, while older individuals' attitudes are strongly correlated. The combination of gender egalitarianism and anti-immigrant sentiment may become increasingly common as acceptance of the former spreads, while immigration remains a hotly contested issue.
ANOTHER CIVILIAN VIEW OF UNJUST ENRICHMENT'S STRUCTURAL DEBATE
Authors: Letelier Pablo 
Published: December 2020

AbstractThis article seeks to illustrate the kinds of difficulties that may follow from renouncing a unified approach to restitutionary claims for unjust enrichment. To do so, it draws on the experience of the French legal system, where the notion of unjustified enrichment describes a maxim inspiring various doctrines which have evolved in relative isolation from each other. Relying on this experience, the article argues that the objections recently raised by Nils Jansen against the German law of unjustified enrichment should not lead English lawyers to downplay the value of a unified approach to the subject.
THE PRINCIPLE OF LEGALITY
Authors: Varuhas Jason N.E. 
Published: December 2020

AbstractThis article examines the principle of legality, a principle of statutory interpretation that requires clear statutory words to oust basic common-law norms. The principle is of growing importance in the Supreme Court's public law jurisprudence, yet it has garnered little scholarly attention. This article offers a comprehensive account of the principle, unpacking its core elements and identifying key controversies. The article reveals that lying beyond this apparently straightforward principle is a complex and elaborate jurisprudence, which raises fundamental issues of principle, policy and judicial legitimacy.
Giardia intestinalis can interact, change its shape and internalize large particles and microorganisms
Authors: Benchimol Marlene 
Published: December 2020

AbstractGiardia intestinalis is a parasitic protozoan that inhabits its vertebrate hosts' upper small intestine and is the most common cause of waterborne diarrhoea worldwide. Giardia trophozoites present few organelles, and among them, they possess peripheral vesicles (PVs), which are considered an endosomal–lysosomal system. All experimental procedures carried out until now indicate that Giardia ingests macromolecules by fluid-phase and receptor-mediated endocytic pathways. Still, there is no description concerning the interaction and ingestion of large materials. Here, we tested Giardia's capacity to interact with large particles; once, in vivo, it inhabits an environment with a microbiota. We tested protozoan interaction with yeasts, bacteria, latex beads, ferritin and albumin, in different times of interaction and used several microscopy techniques (light microscopy, scanning electron microscopy and transmission electron microscopy) to follow their fate. Giardia interacted with all of the materials we tested. Projections of the plasma membrane similar to pseudopods were seen. As albumin, small markers were found in the PVs while the larger materials were not seen there. Large vacuoles containing large latex beads were detected intracellularly. Thus, we observed that: (1) Giardia interacts with large materials; (2) Giardia can display an amoeboid shape and exhibit membrane projections when in contact with microorganisms and large inorganic materials; (3) the region of the exit of the ventral flagella is very active when in contact with large materials, although all cell surface also present activity in the interactions; (4) intracellular vacuoles, which are not the PVs, present ingested large beads.
Bipolar Spectrum disorders in Parkinson’s disease: a systematic evaluation
Authors: Bacciardi Silvia , Elefante Camilla , Brancati Giulio Emilio , Mazzucchi Sonia , Del Prete Eleonora , Frosini Daniela , Maremmani Icro , Lattanzi Lorenzo , Ceravolo Roberto , Bonuccelli Ubaldo , Perugi Giulio 
Published: December 2020

AbstractObjectivePsychiatric disorders are very common in patients affected by Parkinson’s disease (PD). However, comorbidity with Bipolar Spectrum disorders is understudied. The aim of this study is to explore the clinical correlates of PD associated with Bipolar Spectrum disorders.MethodsOne hundred PD patients were screened for psychiatric comorbidities, cognitive profile, motor, and non-motor symptoms. The sample was divided into three groups: PD-patients with Bipolar Spectrum disorders (bipolar disorder type I, type II, and spontaneous or induced hypomania; N = 32), PD-patients with others psychiatric comorbidities (N = 39), PD-patients without psychiatric comorbidities (N = 29). Clinical features were compared among the groups using analysis of variance and chi-square test. A logistic regression was performed to evaluate the association between Bipolar Spectrum disorders and early onset of PD (≤50 years) controlling for lifetime antipsychotic use.ResultsIn comparison with PD patients with and without other psychiatric comorbidity, subjects affected by Bipolar Spectrum disorders were younger, showed more frequently an early onset PD, reported more involuntary movements and a higher rate of impulse control disorders and compulsive behaviors. No differences were observed in indexes of exposure to dopamine agonist treatments. The early onset of PD was predicted by Bipolar Spectrum comorbidity, independently from lifetime antipsychotic use.ConclusionBipolar Spectrum disorders are common in early onset PD. The presence of bipolar comorbidity could identify a particular subtype of PD, showing higher rates of neurological and psychiatric complications and deserving further investigation.
Use of selective serotonin and norepinephrine reuptake inhibitors (SNRIs) in the treatment of autism spectrum disorder (ASD), comorbid psychiatric disorders and ASD-associated symptoms: a clinical review
Authors: Nanjappa Muralidhara Shankarapura , Voyiaziakis Emanuel , Pradhan Basant , Mannekote Thippaiah Srinagesh 
Published: December 2020

AbstractIt is challenging to treat symptoms of autism spectrum disorder (ASD), comorbid psychiatric disorders and ASD-associated symptoms. Some of the commonly used medications to treat these can, and frequently do have serious adverse side effects. Therefore, it is important to identify medications that are effective and with fewer side effects and negative outcomes. In this review, we looked at current evidence available for using the serotonin and norepinephrine reuptake inhibitors (SNRIs) class of medications in treating some of these often difficult to treat symptoms and behaviors. An extensive literature search was conducted using EBSCO.host. Our search algorithm identified 130 articles, 6 of which were deemed to meet criteria for the purpose of this review. Each of these six articles was independently reviewed and critically appraised. As a prototype of the SNRIs family, venlafaxine was found to be a useful adjuvant in children and adults with ASD for the treatment of self-injurious behaviors, aggression, and ADHD symptoms when used in doses lower than its antidepressant dosage. However, duloxetine was not found to show any added benefit in treatment of any of the comorbid symptoms and behaviors in ASD when compared to other antidepressants. On the other hand, milnacipran was reported to produce improvements in impulsivity, hyperactivity symptoms, and social functioning through reduction of inattention of ADHD when comorbid with ASD. Overall, SNRIs were shown variable effectiveness in treatment of these comorbid symptoms and behaviors in ASD.
HAUSDORFF DIMENSION FOR THE SET OF POINTS CONNECTED WITH THE GENERALIZED JARNÍK–BESICOVITCH SET
Authors: BAKHTAWAR AYREENA 
Published: December 2020

AbstractIn this article we aim to investigate the Hausdorff dimension of the set of points

$x \in [0,1)$
such that for any

$r\in \mathbb {N}$
,

$$ \begin{align*} a_{n+1}(x)a_{n+2}(x)\cdots a_{n+r}(x)\geq e^{\tau(x)(h(x)+\cdots+h(T^{n-1}(x)))} \end{align*} $$
holds for infinitely many

$n\in \mathbb {N}$
, where h and

$\tau $
are positive continuous functions, T is the Gauss map and

$a_{n}(x)$
denotes the nth partial quotient of x in its continued fraction expansion. By appropriate choices of

$r,\tau (x)$
and

$h(x)$
we obtain various classical results including the famous Jarník–Besicovitch theorem.
Availability as key determinant in the palliative home care setting from the patients’ and family caregivers’ perspectives: A quantitative-qualitative-content analysis approach
Authors: Dillen Kim , Joshi Melanie , Krumm Norbert , Hesse Michaela , Brunsch Holger , Schmidt Holger , Strupp Julia , Radbruch Lukas , Rolke Roman , Voltz Raymond 
Published: December 2020

AbstractObjectiveA sense of security is important in palliative home care. Yet, knowledge about which components contribute most to feeling secure from the patients’ and family caregivers’ perspectives, especially since the introduction of specialist palliative home care, is sparse. The goal of the current study was to determine the key components contributing to a sense of security and how they relate to each other as experienced by patients and family caregivers in specialist and generalist palliative home care.MethodsThe current sub-study, as part of a larger study, was performed in different regions in Germany. Palliative care patients and family caregivers of at least 18 years of age, being cared for at home were interviewed using semi-structured interview guides following a three-factor model and analyzed by using a combined quantitative-qualitative-content approach.ResultsOne hundred and ninty-seven patients and 10 carers completed interviews between December 2017 and April 2019. The majority of patients were diagnosed with an oncological disease. Sense of security was mentioned particularly often suggesting its high relevance. We identified nine subcategories that were all mentioned more frequently by specialist than generalist palliative home care recipients in the following order of priority and relation: (i) patient-centeredness: availability, provision of information/education, professional competence, patient empowerment, and trust (ii) organizational work: comprehensive responsibility, external collaboration, and internal cooperation, and (iii) direct communication.Significance of resultsThe work of specialist palliative home care services in particular was perceived as very effective and beneficial. Our findings confirm a previously developed three-factor model allowing for generalizability and revealed that availability was most important for improving the sense of security for effective palliative home care.
Association between gestational cannabis exposure and maternal, perinatal, placental, and childhood outcomes
Authors: Ayonrinde Oyekoya T. , Ayonrinde Oyedeji A. , Van Rooyen Derrick , Tait Robert , Dunn Mikaela , Mehta Shailender , White Scott , Ayonrinde Oyekunle K. 
Published: December 2020

AbstractGlobally, the availability and formulations for the administration of cannabis are changing with decriminalization or legalization of recreational use in some jurisdictions, and the prescription of cannabis also occurring. These changes are likely to affect the prevalence of use, including by women of childbearing age. The effects of in utero and infant alcohol and tobacco exposure are well-documented, but the outcomes of cannabis exposure are less certain. The content of delta-9-tetrahydrocannabinol (THC), the psychoactive component of cannabis has progressively increased over several decades. This review explores the limited knowledge surrounding the epidemiology of gestational and postnatal cannabis exposure and implications for the mother–placenta–fetus/neonate triad. We examine cannabis’ effects from antenatal and lactation exposure on (a) pregnancy and perinatal outcomes, (b) placental health, and (c) longer term cardiometabolic and neurodevelopmental risks and outcomes. Though definitive outcomes are lacking, gestational cannabis has been associated with increased risk of other substance use during pregnancy; impaired placental blood flow; increased risk of small for gestational age births; and associated complications. Childhood and adolescent outcomes are sparsely assessed, with suggested outcomes including increased risk of depression and attention-deficit hyperactivity disorder. Cardiometabolic implications of gestational cannabis use may include maternal fatty liver, obesity, insulin resistance, and increased risk of gestational diabetes mellitus (GDM), with potential consequences for the fetus. Clinical implications for pediatric practice were explored in a bid to understand any potential risk or impact on child health and development.
Legislative aims and the Kantian supranational court: A comment on Alec Stone Sweet and Clare Ryan, A Cosmopolitan Legal Order
Authors: SADURSKI WOJCIECH 
Published: December 2020

AbstractIn my short comment on the new book by Alec Stone Sweet and Clare Ryan, I claim that the European Court of Human Rights does not take the ‘legitimacy of state goals’ step in its proportionality analysis seriously enough, relegating all its hard intellectual work to the next step: necessity scrutiny. What is puzzling about Stone Sweet and Ryan’s book is that this observation about the ECtHR hardly registered in the book’s argument, even though a Kantian perspective seems to be quite hospitable to a consideration of the scarcity of goal scrutiny in ECtHR case law.
The ECtHR, transregional dialogues and global constitutionalism
Authors: SANDHOLTZ WAYNE 
Published: December 2020

AbstractIn A Cosmopolitan Legal Order, Stone Sweet and Ryan suggest that ‘from the standpoint of global law, we see that the [European Court of Human Rights] has taken its place in a pluralist, rights-based international order, as one trustee of this global order’. This article is a preliminary attempt to evaluate signs of movement toward global rights review. A multi-level charter of rights exists in the network of international and regional human rights treaties and in national constitutions. An incipient structure of global rights review exists in the form of the regional human rights courts, which see themselves as trustees of the larger global human rights system. Judicial dialogue among the regional courts allows for informal, decentralized coordination among them. The European Court of Human Rights serves as a point of reference for the African and Inter-American systems, though these also cite each other. Transregional judicial dialogue establishes a rudimentary, informal and decentralized mechanism of coordination among bodies that exercise a review function in the multi-level system of international human rights.
Historical Changes in Surface Soil Moisture Over the Contiguous United States: An Assessment of CMIP6
Authors: Yuan Shanshui , Quiring Steven M. , Leasor Zachary T. 
Published: December 2020

AbstractThe newly released simulations from the Sixth Phase of the Coupled Model Intercomparison Project (CMIP6) provide an opportunity to re‐examine long‐term soil moisture trends. In this study, we assessed the historical simulation (1850–2014) of surface soil moisture from 18 general circulation models that are part of CMIP6 and compared them with model simulations from CMIP5 and NLDAS‐2, and in situ observations over CONUS. Our results show that for CONUS as a whole, there is no significant long‐term trend in soil moisture, but significant drying trends exist over medium‐term, short‐term, and near‐present periods based on the CMIP6. Our comparison of CMIP6 to NLDAS‐2 (1980–2014) and in situ observations (2004–2014) demonstrates that it more accurately captures soil moisture trends in CONUS than CMIP5. CMIP6 shows a significant wetting trend in the Northwest, Midwest, Northeast, and Southeast. There is greater agreement amongst the individual models in CMIP6 than CMIP5, but intermodel variability still exists.