bluuebunny/crossref_metadata_2025 huggingface dataset:
Tagesschläfrigkeit bei Pflegepersonal
Authors: Koch Peter , Damerau Lukas , Kersten Jan Felix , Harth Volker , Augustin Matthias , Nienhaus Albert , Terschüren Claudia
Published: February 2023

Hintergrund

Aufgrund von Arbeitszeiten, die außerhalb der normalen Tagesarbeitszeit liegen, kann es bei Pflegepersonal zu Störungen der inneren Uhr kommen. Durch zusätzliche Verpflichtungen im familiären Bereich kann sich möglicherweise eine Normalisierung der zirkadianen Störung bei weiblichen Pflegenden erschweren, da sie zu Hause nicht genug Zeit für Schlaf und Erholung finden.

Fragestellung

In der vorliegenden Arbeit soll explorativ untersucht werden, ob Beschäftigte in der Pflege ein höheres Risiko für Tagesschläfrigkeit haben als andere Berufsgruppen, die nicht im Schichtdienst arbeiten. Darüber hinaus soll ebenfalls explorativ analysiert werden, inwiefern das Geschlecht in Verbindung mit der Beschäftigung im Schichtdienst eine Rolle hinsichtlich der Tagesschläfrigkeit spielt.

Material und Methoden

Aus der 10.000er Baselinestichprobe der Hamburg City Health Study (HCHS) wurden alle Proband:innen selektiert, die beruflich in der Pflege tätig waren. Anhand des Alters, des Geschlechts und des Chronotyps wurden aus dem HCHS-Datensatz aktiv Beschäftigte im Verhältnis 1:3 gezogen, die aus Branchen mit vorwiegend keiner Schichtarbeit stammen (Kontrollen). Die Tagesschläfrigkeit wurde anhand des Epworth-Sleepiness-Scale-Fragebogens (ESS) erhoben.

Ergebnisse

In der Gesamtstichprobe der HCHS waren 4646 Personen aktiv beschäftigt. Unter diesen befanden sich 134 Personen, die angaben, in der Pflege zu arbeiten. Anhand des Matchings von 1:3 wurde ein Datensatz von 536 Personen erzeugt. Insgesamt konnte für 19 % der Stichprobe eine exzessive Tagesschläfrigkeit beobachtet werden, davon betroffen waren 25 % der Pflegenden und 17 % der Beschäftigten anderer Branchen. Weibliche Beschäftigte in der Pflege hatten im Vergleich zu Männern aus anderen Branchen ein statistisch signifikant erhöhtes Risiko für exzessive Tagesschläfrigkeit (OR 3,5; 95 % KI 1,32–9,23).

Diskussion

Anhand der Ergebnisse der bevölkerungsbezogenen Untersuchung zeigt sich, dass Pflegepersonal im Vergleich zu Branchen ohne Schichtarbeit öfter von Tagesschläfrigkeit betroffen ist. Inwieweit Frauen, die in der Pflege arbeiten ein noch höheres Risiko für Tagesschläfrigkeit besitzen, sollte in weiteren Studien anhand zusätzlicher Merkmale präziser untersucht werden.
A Unique Metro Choice Behaviour of Suburban Rail Passengers in India
Authors: Selvakumar M. , Ramulu D. Siddi , Sankar K.
Published: February 2023

This study aims to analyse the inter-rail modal shift behaviour of suburban rail passengers to examine ridership for the proposed metro extension corridor in Chennai, India. This investigation was conducted in 2019 as part of a feasibility study for the extension of the metro line spanning between Chennai Airport and Kilambakkam, a southern suburb of Chennai. The same origin–destination pair is also served by the suburban rail system. It is an extension of the operating line from Washermenpet to the airport of the Phase I metro project. For this inter-rail competition study, a sample of 272 suburban rail passengers covering work, education and other trip purposes were interviewed using a stated preference questionnaire. Six stated scenarios were considered for analyses which included travel time saving by using the metro along with the fare difference between metro and bus. The study revealed that suburban rail passengers were less concerned about travel time saving and gave priority to fare difference irrespective of trip purpose. This shows the unique metro choice behaviour of suburban rail travellers in the Indian context.
Interaction of natural and hydraulic fractures: the impact on reservoir pressure buildup and risk of shear fault reactivation in the Upper Devonian Duvernay Formation, Fox Creek, Alberta
Authors: Li Qiuguo , Konstantinovskaya Elena , Zhmodik Alexey , Ibelegbu Charles
Published: February 2023

The interaction of natural and hydraulic fractures may facilitate lateral fluid propagation in an unconventional reservoir resulting in fast fluid pressure transmission from treatment wells to a fault zone and potential fault shear slip reactivation and associated induced seismicity. Several induced earthquakes (up to 4.1 Mw) occurred since 2013 during hydraulic fracturing of the Upper Devonian Duvernay Formation in the Western Canada Sedimentary Basin. The mechanism of lateral fluid migration in the unconventional reservoir is not well understood. The current study aims to investigate the interaction of natural fractures and hydraulic fractures for the case study in the area south of Fox Creek, where a linear zone of induced earthquakes (up to 3.9 Mw) occurred along a fault in 2015 during hydraulic fracturing of horizontal wells. We analyze the growth of hydraulic fractures in presence of natural fractures, the impact of resulting complex fracture network on fluid transmission and fluid pressure buildup around the treatment wells. Hydraulic fracture modeling (HFM), reservoir simulations and 3D coupled reservoir-geomechanical modeling are applied to match the timing of hydraulic fracture propagation and transmitted fluid pressure increase in the fault zone versus induced earthquake occurrence. HFM results are verified by microseismic clouds distribution. Reservoir simulations are validated by a history matching of fluid injection volume and bottomhole pressure data. Additional HFM simulations are carried out to optimize the pumping schedule in the studied well pad that would help to prevent hydraulic fractures reaching the fault and minimize the risk of induced seismicity.

Article highlights

Stress anisotropy and simulated natural fractures impact lateral growth of complex hydraulic fractures and reservoir pressure buildup.

Predicted fluid pressure transmission to a fault zone results in fault dextral shear slip reactivation matching induced seismicity.

Optimized pumping schedule helps to minimize risks of fault reactivation and induced seismicity while preserving overall pad performance.
Experimental investigation of the fracture initiation and propagation for sandstone hydraulic fracturing under the effect of evenly distributed pore pressure
Authors: Zhao Xinglong , Huang Bingxiang , Cai Qingwang , Zhao Long , Chen Bin
Published: February 2023

Pore pressure is disregarded in traditional laboratory rock hydraulic fracturing experiments, and the effect of pore pressure is not clear. An integrated experiment for seepage and hydrofracturing was established and used to perform sandstone hydraulic fracturing experiments under an initial evenly distributed pore pressure. The experimental results show that there is a positive correlation between the breakdown pressure and the pore pressure at the initiation stage. The data fitting results show that the breakdown pressure and pore pressure follow a linear growth trend. As the pore pressure increases, the acoustic emission energy at the moment of borehole wall fracturing correspondingly increases. After borehole wall fracturing, the reduced magnitude of the pumping pressure also increases, indicating that the initial rupture range is positively correlated with pore pressure. During fracturing propagation, the propagation range and opening of the fracture increase as the initial pore pressure increases within the same pumping time. During hydraulic fracturing, a pore pressure gradient is generated on both sides of the mineral particles. When the tensile stress or shear stress induced by the pore pressure gradient reaches the ultimate strength of the mineral particle bonding surface, the particle bonding surface breaks and opens. This experimental process is more similar to the actual hydraulic fracturing process of oil and gas reservoirs. These results provide a more comprehensive theoretical basis for resolving technical problems of unconventional oil and gas resource exploitation.
Effect of Different Organic Amendments on Actual and Achievable Yields in a Cereal-Based Cropping System
Authors: Albano Xavier , Whitmore Andrew P. , Sakrabani Ruben , Thomas Cathy L. , Sizmur Tom , Ritz Karl , Harris Jim , Pawlett Mark , Watts Chris , Haefele Stephan M.
Published: February 2023

Soil fertility is at risk in intensive cropping systems when using an exclusive regime of inorganic fertilisers without returning sufficient organic matter to the soil. Our objective was to evaluate the long-term effects of commonly used organic amendments interacting with different rates of inorganic nitrogen fertiliser on crop yields of winter wheat. Yield data from winter wheat were collected for five seasons between 2013 and 2019 from a continuous field trial based at Rothamsted Research, SE England. Organic amendments (anaerobic digestate, compost, farmyard manure, and straw at a rate of 0 and 2.5 ton C per hectare) and five rates of inorganic nitrogen fertiliser (NH4NO3 at 0, 80, 150, 190, 220 kg N ha−1) were applied to winter wheat grown in an arable rotation. At the same inorganic N rate, grain yields for the different organic amendment treatments (excluding the straw treatment) were statistically similar but significantly greater than the unamended control treatment. The nitrogen rate required for optimum yields tended to be lower in plots receiving a combination of organic amendments and mineral fertiliser. Based on the observed and modelled response functions, organic amendments excluding straw increased maximum achievable yields compared to non-amended controls. The size of the effect varied between seasons and amendments (+4.6 to +19.0% of the control yield), increasing the mean maximum achievable yield by 8.8% across four seasons. We conclude that the application of organic amendments can increase the yield potential in winter wheat substantially over what is achievable with inorganic fertiliser only.
Modulation of the endoplasmic reticulum stress and unfolded protein response mitigates the behavioral effects of early-life stress
Authors: Solarz-Andrzejewska Anna , Majcher-Maślanka Iwona , Kryst Joanna , Chocyk Agnieszka
Published: February 2023

Background

Early-life stress (ELS) affects brain development and increases the risk of mental disorders associated with the dysfunction of the medial prefrontal cortex (mPFC). The mechanisms of ELS action are not well understood. Endoplasmic reticulum (ER) stress and the unfolded protein response (UPR) are cellular processes involved in brain maturation through the regulation of pro-survival or proapoptotic processes. We hypothesized that ER stress and the UPR in the mPFC are involved in the neurobiology of ELS.

Methods

We performed a maternal separation (MS) procedure from postnatal days 1 to 14 in rats. Before each MS, pups were injected with an inhibitor of ER stress, salubrinal or a vehicle. The mRNA and protein expression of UPR and apoptotic markers were evaluated in the mPFC using RT-qPCR and Western blot methods, respectively. We also estimated the numbers of neurons and glial cells using stereological methods. Additionally, we assessed behavioral phenotypes related to fear, anhedonia and response to psychostimulants.

Results

MS slightly enhanced the activation of the UPR in juveniles and modulated the expression of apoptotic markers in juveniles and preadolescents but not in adults. Additionally, MS did not affect the numbers of neurons and glial cells at any age. Both salubrinal and vehicle blunted the expression of UPR markers in juvenile and preadolescent MS rats, often in a treatment-specific manner. Moreover, salubrinal and vehicle generally alleviated the behavioral effects of MS in preadolescent and adult rats.

Conclusions

Modulation of ER stress and UPR processes may potentially underlie susceptibility or resilience to ELS.
Approach for improved development of advanced driver assistance systems for future smart mobility concepts
Authors: Weber Michael , Weiss Tobias , Gechter Franck , Kriesten Reiner
Published: February 2023

To use the benefits of Advanced Driver Assistance Systems (ADAS)-Tests in simulation and reality a new approach for using Augmented Reality (AR) in an automotive vehicle for testing ADAS is presented in this paper. Our procedure provides a link between simulation and reality and should enable a faster development process for future increasingly complex ADAS tests and future mobility solutions. Test fields for ADAS offer a small number of orientation points. Furthermore, these must be detected and processed at high vehicle speeds. That requires high computational power both for developing our method and its subsequent use in testing. Using image segmentation (IS), artificial intelligence (AI) for object recognition, and visual simultaneous localization and mapping (vSLAM), we aim to create a three-dimensional model with accurate information about the test site. It is expected that using AI and IS will significantly improve performance as computational speed and accuracy for AR applications in automobiles.
More Than Meets the Eye
Authors: Schlanger Sarah H.
Published: February 2023

Culturally significant landscapes, which evoke and promote strong feelings of attachment among their constituencies and advocates, pose a management challenge for federal agencies. Current cultural resources laws and policies focus largely on the physical characteristics of individual sites and features. I call here for a management approach that differs from current practice in several important ways. First, it recognizes the power of landscapes and landscape character. Drawing from both wilderness and park management, it calls for the identification and preservation of landscape characteristics, and the development of landscape-level inventories that can identify current landscape condition. Finally, it recognizes that how a landscape is experienced by its constituencies and advocates is a measure of management effectiveness. For management to succeed, management approaches must recognize and respect the core values and experiences that are at the heart of culturally significant landscapes.
Our Checkered Past
Authors: Leckman Phillip O. , Heilen Michael
Published: February 2023

Despite advocacy of landscape approaches in cultural resource management (CRM) and critiques of the site concept, CRM data collection methods in the western United States continue to focus on individual archaeological sites as units of observation, analysis, and management. The transect-recording unit (TRU) method strikes a balance between conventional site-based recording methods and site-less survey approaches by dividing survey space into a grid of uniformly sized cells for recording all cultural manifestations observed across a survey area. TRU survey generates site boundaries required by CRM regulations while retaining a fine-grained spatial framework for landscape-level research and management. This article discusses the technical requirements of the TRU system and its potential for improving landscape-level research and management. Advances in digital recording technologies and analysis techniques render the method efficient and effective in identifying cultural resource distributions and characteristics otherwise obscured by conventional approaches. The research and management potential of the TRU system is illustrated through identification and interpretation of precontact foot trails in New Mexico's Tularosa Basin. These trails are essentially invisible during pedestrian survey but are readily identifiable as linear patterns using aggregated landscape-scale TRU survey data from multiple survey projects, providing novel insight into precontact routes of movement and exchange.
Ta-Nehisi Coates'sBetween the World and Me: A Phenomenology of Racialized Conflict
Authors: RAUTENBERG NICLAS
Published: February 2023

This article investigates the structure of racialized conflict experience. Embarking from a conflict event in Ta-Nehisi Coates's autobiographyBetween the World and Meand contrasting the work of Maurice Merleau-Ponty and Alfred Schutz with insights from Black phenomenology, I argue that Coates's experience discloses conflictual, but intertwined, modes of being-in-the-world. Further, it presents an instantiation of a particular kind of conflict, i.e., corporeal conflict. Corporeal conflict applies whenever the body is politicized, i.e., when it becomes the marker for traits representative of a rival political group. Understood this way, racialized conflict is always political. I conclude the article with some remarks on the shortcomings of two dominant conflict theories in political philosophy and the potential for an alternative, phenomenological approach that enables new ways of engaging the other in conflict. The analysis is preceded by a meditation on the role of the White researcher in critical philosophy of race.
Voluntariness and the bounds of cost–benefit analysis
Authors: Sugden Robert
Published: February 2023

Behavioural economists often claim that their policy recommendations are justified by cost–benefit analysis (CBA), but without adequate explanation of the methodology they have in mind. I sketch the outlines of a CBA methodology that is compatible with the findings of behavioural economics and is in accord with my account in Sugden (2018) of a well-functioning market as a network of opportunities for mutually beneficial transactions. The key idea is that the CBA of a project is concerned only with effects that are not transmitted through voluntary interactions. I illustrate this proposal by considering the appraisal of fuel economy mandates.
Does E-learning Facilitate Medical Education in Pediatric Neurology?
Authors: Curry Brittany , Buttle Sarah , McMillan Hugh J. , Webster Richard , Reddy Deepti , Karir Aneesh , Spence Stewart , Mineyko Aleksandra , Writer Hilary , MacLean Heather , Pohl Daniela
Published: February 2023

Background:

E-learning has become commonplace in medical education. Incorporation of multimedia, clinical cases, and interactive elements has increased its attractiveness over textbooks. Although there has been an expansion of e-learning in medicine, the feasibility of e-learning in pediatric neurology is unclear. This study evaluates knowledge acquisition and satisfaction using pediatric neurology e-learning compared to conventional learning.

Methods:

Residents of Canadian pediatrics, neurology, and pediatric neurology programs and medical students from Queens University, Western University, and the University of Ottawa were invited to participate. Learners were randomly assigned two review papers and two ebrain modules in a four-topic crossover design. Participants completed pre-tests, experience surveys, and post-tests. We calculated the median change in score from pre-test to post-test and constructed a mixed-effects model to determine the effect of variables on post-test scores.

Results:

In total, 119 individuals participated (53 medical students; 66 residents). Ebrain had a larger positive change than review papers in post-test score from pre-test score for the pediatric stroke learning topic but a smaller positive change for Duchenne muscular dystrophy, childhood absence epilepsy, and acute disseminated encephalomyelitis. Learning topics showed statistical relationship to post-test scores (p = 0.04). Depending on topic, 57–92% (N = 59–66) of respondents favored e-learning over review article learning.

Conclusions:

Ebrain users scored higher on post-tests than review paper users. However, the effect is small and it is unclear if it is educationally meaningful. Although the difference in scores may not be substantially different, most learners preferred e-learning. Future projects should focus on improving the quality and efficacy of e-learning modules.
Commerce and Credit: Female Credit Networks in Eighteenth-Century Kingston, Jamaica
Authors: Burnard Trevor , Haggerty Sheryllynne
Published: February 2023

Recent work on white women in Jamaica has shown that they were active participants in Jamaica’s slave economy. This article adds to this recent literature through an innovative use of social network analysis (SNA) to examine the credit networks in which women operated in the thriving eighteenth-century British Atlantic town of Kingston, Jamaica. In particular, it uses closeness and centrality measures to quantify the distinctive role that white women had in local credit networks. These were different from those of men involved in transatlantic trade, but were vital in facilitating female access to credit enabling domestic retail trade. White female traders in particular facilitated female access to credit networks, acting as significant conduits of money and information in ways that were crucial to the local economy. Their connectedness within trade networks increased over time, despite their greater exposure than larger traders to economic shocks. We therefore demonstrate that white women were active protagonists in the developing economy of eighteenth-century Jamaica.
Expanding mental health services in low- and middle-income countries: A task-shifting framework for delivery of comprehensive, collaborative, and community-based care
Authors: Bolton Paul , West Joyce , Whitney Claire , Jordans Mark J.D. , Bass Judith , Thornicroft Graham , Murray Laura , Snider Leslie , Eaton Julian , Collins Pamela Y. , Ventevogel Peter , Smith Stephanie , Stein Dan J. , Petersen Inge , Silove Derrick , Ugo Victor , Mahoney John , el Chammay Rabih , Contreras Carmen , Eustache Eddy , Koyiet Phiona , Wondimu Esubalew Haile , Upadhaya Nawaraj , Raviola Giuseppe
Published: February 2023

This paper proposes a framework for comprehensive, collaborative, and community-based care (C4) for accessible mental health services in low-resource settings. Because mental health conditions have many causes, this framework includes social, public health, wellness and clinical services. It accommodates integration of stand-alone mental health programs with health and non-health community-based services. It addresses gaps in previous models including lack of community-based psychotherapeutic and social services, difficulty in addressing comorbidity of mental and physical conditions, and how workers interact with respect to referral and coordination of care. The framework is based on task-shifting of services to non-specialized workers. While the framework draws on the World Health Organization’s Mental Health Gap Action Program and other global mental health models, there are important differences. The C4 Framework delineates types of workers based on their skills. Separate workers focus on: basic psychoeducation and information sharing; community-level, evidence-based psychotherapeutic counseling; and primary medical care and more advanced, specialized mental health services for more severe or complex cases. This paper is intended for individuals, organizations and governments interested in implementing mental health services. The primary aim is to provide a framework for the provision of widely accessible mental health care and services.
The shift towards an eco-welfare state: growing stronger together
Authors: Hasanaj Valon
Published: February 2023

Poverty, inequality and climate change are profoundly interconnected issues and represent grave threats to the future of our planet and civilization. Failure in one will result in failure in the other; thus, government responses to such threats must be meticulously coordinated, especially across environmental and welfare state programs. In recent years, a growing body of research has examined the links between these two domains, lauding the eco-welfare state as a viable path forward. As the literature on the eco-welfare state is at an early stage, this study proposes two essential theoretical and empirical contributions. First, it examines the most prominent theoretical interpretations of the concept of eco-welfare state and proposes a refined understanding. Second, using model-based cluster analysis for 42 countries, this study empirically unveils a global shift towards and the existence of an eco-welfare state.
Cross-shore wind-induced changes to field-scale overturning wave shape
Authors: Feddersen Falk , Fincham Adam M. , Brodie Katherine L. , Young Adam P. , Spydell M.S. , Grimes Derek J. , Pieszka Michal , Hanson Kentaro
Published: February 2023

The shape of depth-limited breaking-wave overturns is important for turbulence injection, bubble entrainment and sediment suspension. Overturning wave shape depends on a nonlinearity parameter$H/h$, where$H$is the wave height, and$h$is the water depth. Cross-shore wind direction (offshore/onshore) and magnitude affect laboratory shoaling wave shape and breakpoint location$X_{{bp}}$, but wind effects on overturning wave shape are largely unstudied. We perform field-scale experiments at the Surf Ranch wave basin with fixed bathymetry and$\approx 2.25$m shoaling solitons with small height variations propagating at$C=6.7\ \mathrm {m}\ \mathrm {s}^{-1}$. Observed non-dimensional cross-wave wind$U_w$was onshore and offshore, varying realistically ($-1.2 < U_{w}/C < 0.7$). Georectified images, a wave staff, and lidar are used to estimate$X_{{bp}}$,$H/h$, overturn area$A$and aspect ratio for 22 waves. The non-dimensionalized$X_{{bp}}$was inversely related to$U_{w}/C$. The non-dimensional overturn area and aspect ratio also were inversely related to$U_{w}/C$, with smaller and narrower overturns for increasing onshore wind. No overturning shape dependence on the weakly varying$H/h$was seen. The overturning shape variation was as large as prior laboratory experiments with strong$H/h$variations without wind. An idealized potential air flow simulation on steep shoaling soliton shape has strong surface pressure variations, potentially inducing overturning shape changes. Through wave-overturning impacts on turbulence and sediment suspension, coastal wind variations could be relevant for near-shore morphology.
INTERCOMPARISON EXERCISE ON FUEL SAMPLES FOR DETERMINATION OF BIOCONTENT RATIO BY 14C ACCELERATOR MASS SPECTROMETRY
Authors: Varga Tamás , Hajdas Irka , Calcagnile Lucio , Quarta Gianluca , Major István , Jull A J Timothy , Molnár Anita , Molnár Mihály
Published: February 2023

The method of determining the biobased carbon content in liquid fuel samples is standardized, but different laboratories use different protocols during sample preparation and perform the measurements using different machines. The accelerator mass spectrometry (AMS) laboratories use different combustion, preparation, and graphitization methods for the graphite production for the spectrometric measurements. As a result, the intercomparison between the laboratories is inevitable to prove precision and accuracy and to demonstrate that the results are comparable. In this study, we present the results of an intercomparison campaign involving three 14C accelerator mass spectrometry laboratories. Five samples were used in the measurement campaign, including two biocomponents (fatty acid methyl ester, hydrotreated vegetable oil), one fossil component (fossil diesel), and two blends (mixtures of fossil and biocomponent with 90–10% mixing ratio) in the laboratories of CEDAD (Italy), ETH (Switzerland), and INTERACT (Hungary). The results presented by the laboratories are comparable, and all three laboratories could determine the biobased carbon content of the samples within 1% relative uncertainty, which is acceptable in the scientific, economic, and industrial fields for biocomponent determination.
RECONSTRUCTING HUMAN−ENVIRONMENTAL RELATIONSHIP IN THE SIBERIAN ARCTIC AND SUB-ARCTIC: A HOLOCENE OVERVIEW
Authors: Kuzmin Yaroslav V
Published: February 2023

This paper examines patterns of human–environmental interactions across northern Asia during the Holocene, in order to summarize current knowledge and identify key areas for future research. To achieve these goals, currently available chronological, cultural, and paleoenvironmental datasets from the east Russian Arctic for the last 10,000 14C years were integrated. Study regions include the Taymyr Peninsula, Lena River basin (except its southern part), northeastern Siberia, and Kamchatka Peninsula. Several broad-scale correlations between climatic fluctuations and cultural responses (e.g., subsistence strategies and occupation densities) were identified; however, these are not straightforward. For example, the increase of occupations during the warm periods in the Early–Middle Holocene are notable while the most pronounced rises coincide with a cooling trend in the Late Holocene. This shows that the human–environmental relationships in the Holocene were not linear; more interdisciplinary research will be needed to construct higher resolution data for understanding prehistoric cultural responses to past environmental changes in the Asian Arctic.
The Only Constant Is Change: Nonconstant Volatility and Implied Volatility Spreads
Authors: Campbell T. Colin , Gallmeyer Michael , Petkevich Alex
Published: February 2023

We examine the predictability of stock returns using implied volatility spreads (VS) from individual (nonindex) options. VS can occur under simple no-arbitrage conditions for American options when volatility is time-varying, suggesting that the VS-return predictability could be an artifact of firms’ sensitivities to aggregate volatility. Examining this empirically, we find that the predictability changes systematically with aggregate volatility and is positively related to the firms’ sensitivities to volatility risk. The alpha generated by VS hedge portfolios can be explained by aggregate volatility risk factors. Our results cannot be explained by firm-specific informed trading, transaction costs, or liquidity.
The functions of leisure in later life: bridging individual- and community-level perspectives
Authors: Hennessy Catherine Hagan
Published: February 2023

Leisure participation in older age has principally been researched from individual-level theoretical perspectives that view leisure as reflecting adaptations to ageing-related losses and change. Recent orientations to later-life leisure participation, such as innovation theory, emphasise positive developmental aspects and uses of older individuals' leisure pursuits, driven by personal agency. Moreover, the potential of later-life leisure activities to contribute to community is conceptualised in social capital theory perspectives that bridge individual- and community-level functions of leisure participation. This paper presents findings from qualitative thematic analysis of oral histories on leisure conducted with 58 persons aged 60 and over in rural south-west England, to examine the personal uses and functions of their leisure occupations in older age, and the role that these activities play in connecting older individuals to their communities. While participants described lifetime patterns of leisure characterised by a core set of activities and interests, later life was a period of leisure transitions in which they actively used new and continuing pastimes to adapt to changing personal circumstances, abilities and aspirations. The findings also demonstrate how participants' leisure activities – ranging from avidly pursued hobbies to formal volunteering – served individual adaptive and developmental purposes, and were a means of fostering social connectivity and contributing to rural community life. Implications of these findings are discussed in regard to leisure theory, policy and practice. This paper adds to the literature on ageing and leisure by identifying the benefits of examining older persons' leisure participation from a combined conceptual perspective that can elucidate its functions at both the micro- and meso-levels of society.
Usefulness of linked data for infectious disease events: a systematic review
Authors: Field Emma , Strathearn Melanie , Boyd-Skinner Christopher , Dyda Amalie
Published: February 2023

Surveillance is a key public health function to enable early detection of infectious disease events and inform public health action. Data linkage may improve the depth of data for response to infectious disease events. This study aimed to describe the uses of linked data for infectious disease events. A systematic review was conducted using Pubmed, CINAHL and Web of Science. Studies were included if they used data linkage for an acute infectious disease event (e.g. outbreak of disease). We summarised the event, study aims and designs; data sets; linkage methods; outcomes reported; and benefits and limitations. Fifty-four studies were included. Uses of linkage for infectious disease events included assessment of severity of disease and risk factors; improved case finding and contact tracing; and vaccine uptake, safety and effectiveness. The ability to conduct larger scale population level studies was identified as a benefit, in particular for rarer exposures, risk factors or outcomes. Limitations included timeliness, data quality and inability to collect additional variables. This review demonstrated multiple uses of data linkage for infectious disease events. As infectious disease events occur without warning, there is a need to establish pre-approved protocols and the infrastructure for data-linkage to enhance information available during an event.
Dysregulation profile in children of ethnoracially diverse at-risk families: Factor structure and longitudinal correlates
Authors: Kil Hali , Longpré Charlotte , Mageau Geneviève A.
Published: February 2023

The present work sought to confirm the factor structure and examine longitudinal strengths-based and mental health correlates of the dysregulation profile (DP) in children of at-risk fragile families of diverse ethnoracial backgrounds. The data came from the Fragile Families and Child Wellbeing Study (N = 2125 families). Mothers (Mage = 25.3) were mostly unmarried (74.6%), and children (51.4% boys) were identified as Black (47.0%), Hispanic (21.4%), White (16.7%), or multiracial or other backgrounds. Childhood DP was constructed using mother reports of the Child Behavior Checklist at age 9. Mothers’ in-home parent–child interactions and depressive symptoms were assessed at child age 5. At age 15, children responded about their own mental health, social skills, and other strengths-focused outcomes. A bifactor DP structure fit well to the data, with the DP factor representing difficulties in self-regulation. Using SEM, we found that mothers who were more depressed and used less warm parenting at child age 5 had children who presented with higher DP at age 9. DP was in turn associated with less social skills, perseverance, optimism, and more anxiety, depression, and impulsivity at adolescence. Childhood DP appears to be relevant and applicable for at-risk, diverse families, and may also impede on children’s future positive functioning.
Identifying the ‘active ingredients’ of socioeconomic disadvantage for youth outcomes in middle childhood
Authors: Carroll Sarah L. , Shewark Elizabeth A. , Mikhail Megan E. , Thaler Daniel J. , Pearson Amber L. , Klump Kelly L. , Burt S. Alexandra
Published: February 2023

Background:

Youth experiencing socioeconomic deprivation may be exposed to disadvantage in multiple contexts (e.g., neighborhood, family, and school). To date, however, we know little about the underlying structure of socioeconomic disadvantage, including whether the 'active ingredients' driving its robust effects are specific to one context (e.g., neighborhood) or whether the various contexts increment one another as predictors of youth outcomes.

Methods:

The present study addressed this gap by examining the underlying structure of socioeconomic disadvantage across neighborhoods, families, and schools, as well as whether the various forms of disadvantage jointly predicted youth psychopathology and cognitive performance. Participants were 1,030 school-aged twin pairs from a subsample of the Michigan State University Twin Registry enriched for neighborhood disadvantage.

Results:

Two correlated factors underlay the indicators of disadvantage. Proximal disadvantage comprised familial indicators, whereas contextual disadvantage represented deprivation in the broader school and neighborhood contexts. Results from exhaustive modeling analyses indicated that proximal and contextual disadvantage incremented one another as predictors of childhood externalizing problems, disordered eating, and reading difficulties, but not internalizing symptoms.

Conclusions:

Disadvantage within the family and disadvantage in the broader context, respectively, appear to represent distinct constructs with additive influence, carrying unique implications for multiple behavioral outcomes during middle childhood.
Teotihuacan site 19:N1W5: Mortuary and oxygen isotope evidence for a Michoacan affiliation
Authors: Spence Michael W. , Gómez Chávez Sergio , Longstaffe Fred J. , Gazzola Julie , Pereira Grégory , Olsen Karyn , Pollard Helen Perlstein
Published: February 2023

Site E19 (19:N1W5), near Tlailotlacan, the “Zapotec Barrio” of Teotihuacan, contains evidence of both Tlailotlacan and Michoacan affiliation. To verify and better understand the Michoacan relationship, 22 enamel and 19 bone samples from five E19-affiliated burials were analyzed to determine their oxygen isotope compositions, which provide an indication of an individual's area of residence when that particular tissue was forming. Because prismatic blades and Thin Orange ceramics from Teotihuacan occur widely in the Lakes Region of north central Michoacan we obtained samples from several sites there for comparative purposes. The results show that most of the E19 people had passed their later years in the Patzcuaro Basin of the Lakes Region. Although in E19 the archaeological evidence of this relationship declined over time, the isotopic evidence indicates that Patzcuaro ties continued to the end of E19's occupation. It seems that the people of E19, originally Michoacanos, gradually adopted a core identity as Teotihuacanos while continuing to deploy their Michoacan ancestry during their stays in Michoacan.
‘Save Me from My Friends’: The Transnational Intimacies of an Irish-Latvian Couple within and beyond the Irish Revolution, 1916–1921
Authors: Casey Maurice J.
Published: February 2023

What can a focus on intimacies and affinities between radical immigrants in Ireland and their Irish counterparts tell us about the transnational scope of the global Irish revolution? This article answers this question through the lives of Rose MacKenna, an Irish playwright and socialist, and her husband Sidney Arnold, a Latvian literary translator. The activist career of this obscure Irish-Latvian couple took them from revolutionary Dublin in the wake of the Easter Rising to Petrograd in the aftermath of the Russian Revolution. This article argues that MacKenna and Arnold, by virtue of their obscurity and marginality, rather than in spite of it, can suggest the sources and methodologies required to uncover the transnational world of Ireland's radical intelligentsia.
THE DEMYSTIFICATION OF DAVID RICARDO’S FAMOUS FOUR NUMBERS
Authors: Morales Meoqui Jorge
Published: February 2023

The paper offers the first interpretation of David Ricardo’s famous numerical example fully compatible with the primary source. It claims that the sole purpose of the four numbers was to illustrate that the relative value of commodities made in different countries is not determined by the respective quantities of labor devoted to their production. This exception results from unequal ordinary profit rates between countries because capital does not move across national borders as easily as it does within the same country. Likewise, the paper also debunks some entrenched myths about the numerical example. It shows that Ricardo did not leave the terms of trade indeterminate, that the purpose of the four numbers was not about measuring the gains from trade, and that Portugal had no productivity advantage over England. All of this contradicts the way scholars have interpreted Ricardo’s numerical example since the mid-nineteenth century.
Quinductor: A multilingual data-driven method for generating reading-comprehension questions using Universal Dependencies
Authors: Kalpakchi Dmytro , Boye Johan
Published: February 2023

We propose a multilingual data-driven method for generating reading comprehension questions using dependency trees. Our method provides a strong, deterministic and inexpensive-to-train baseline for less-resourced languages. While a language-specific corpus is still required, its size is nowhere near those required by modern neural question generation (QG) architectures. Our method surpasses QG baselines previously reported in the literature in terms of automatic evaluation metrics and shows a good performance in terms of human evaluation.
Health system-related barriers to prenatal care management in low- and middle-income countries: a systematic review of the qualitative literature
Authors: Mohseni Mohammad , Mousavi Isfahani Haleh , Moosavi Ahmad , Dehghanpour Mohammadian Elham , Mirmohammadi Fatemeh , Ghazanfari Fatemeh , Ahmadi Shiler
Published: February 2023

Background:

Appropriate prenatal care (PNC) is essential for improving maternal and infant health; nevertheless, millions of women in low- and middle-income countries (LMICs) do not receive it properly. The objective of this review is to identify and summarize the qualitative studies that report on health system-related barriers in PNC management in LMICs.

Methods:

This systematic review was conducted in 2022. A range of electronic databases including PubMed, Web of Knowledge, CINHAL, SCOPUS, Embase, and Science Direct were searched for qualitative studies conducted in LMICs. The reference lists of eligible studies also were hand searched. The studies that reported health system-related barrier of PNC management from the perspectives of PNC stakeholders were considered for inclusion. Study quality assessment was performed applying the Critical Appraisal Skills Programme (CASP) checklist, and thematic analyses performed.

Results:

Of the 32 included studies, 25 (78%) were published either in or after 2013. The total population sample included 1677 participants including 629 pregnant women, 122 mothers, 240 healthcare providers, 54 key informed, 164 women of childbearing age, 380 community members, and 88 participants from other groups (such as male partners and relatives). Of 32 studies meeting inclusion criteria, four major themes emerged: (1) healthcare provider-related issues; (2) service delivery issues; (3) inaccessible PNC; and (4) poor PNC infrastructure.

Conclusion:

This systematic review provided essential findings regarding PNC barriers in LMICs to help inform the development of effective PNC strategies and public policy programs.
On the rationale and implications of China’s RMB internationalization: A global historical perspective
Authors: Lim Kean Fan
Published: February 2023

This article addresses two interrelated questions pertaining to the Communist Party of China’s (CPC) attempt to internationalize the Chinese currency – the renminbi (RMB). First, what is the historical rationale of RMB internationalization, and what are its implications? Second, how does the rationale for, and implications of, RMB internationalization distinguish this process from the emergence of the US dollar as the global reserve currency? The article proceeds by framing the RMB internationalization process as a historical palimpsest that emerges from three critical moments following the establishment of the People’s Republic of China in 1949. It then assesses their collective global historical significance through a comparison with the rationale and effects of dollar internationalization. Through foregrounding the domestic and global path-dependence of the RMB’s historical evolution, the article argues that RMB internationalization does not constitute a rupture in global historical terms by challenging the dollar’s global reserve currency status; rather, it paradoxically consolidates a dollar-centric global monetary system because the CPC is committed to sustaining the Mao-era (1949-76) legacy of absolute macroeconomic control.
Observability of isolated neutron stars at SRG/eROSITA
Authors: Khokhriakova Alena D. , Biryukov Anton V. , Popov Sergei B.
Published: February 2023

A four-year sky survey with the use of the eROSITA telescope on board the Spektr-RG observatory will provide the best coverage in the soft (0.5–2 keV) and standard (2–10 keV) X-ray ranges, both in terms of sensitivity and angular resolution. We have analysed the possibility of detecting various types of isolated neutron stars with eROSITA. Among already known objects, eROSITA will be able to detect more than 160 pulsars, 21 magnetars, 7 central compact objects, all seven sources of the Magnificent Seven, and two other X-ray isolated neutron stars during the four-year survey mission.
Deep eROSITA observations of the magnificent seven isolated neutron stars
Authors: Mancini Pires Adriana , Schwope Axel , Kurpas Jan
Published: February 2023

We report the initial results of deep eROSITA monitoring of the magnificent seven isolated neutron stars (INSs). Thanks to a combination of high count statistics and good energy resolution, the eROSITA datasets unveil the increasingly complex energy distribution of these presumably simple thermal emitters. For three targets, we report the detection of multiple (in some cases, phase-dependent) spectral absorption features and deviations from the dominant thermal continuum. Unexpected long-term changes of spectral state and timing behaviour have additionally been observed for two INSs. The results pose challenging theoretical questions on the nature of the variations and absorption features and ultimately impact the modeling of the atmosphere and cooling of highly magnetised neutron stars.
A new model for nulling and moding in radio pulsars
Authors: Dyks Jaroslaw
Published: February 2023

Single pulse behaviour of radio pulsars is usually interpreted in terms of the E × B drift of a radio beam. It is shown that antisymmetric arrangement of the radio-bright zones can produce several types of observed single pulse phenomena: the half-cycle jump in subpulse modulation phase, left-right-middle subpulse sequence and switching between the core-dominated and cone-dominated pulsation modes. The geometry can also produce nulling, both sporadic and intermodal. The model implies that the radio-quiet intervals that separate the main pulse and interpulse in PSR B0826−34 correspond to azimuthal breaks in the radio beam, instead of breaks in colatitude.
Consequences of Jet-Ejecta Interaction in Neutron Star Mergers
Authors: Nativi Lorenzo , Rosswog Stephan , Bulla Mattia , Lundman Christoffer , Lamb Gavin P. , Kowal Grzegorz
Published: February 2023

In the first observed neutron star merger, GW170817, two dynamical components, mildly- and ultra-relativistic outflows were detected independently. The first component triggered a rapidly evolving thermal transient named macronova (kilonova), while the second caused an observed short GRB where the early gamma-ray signal was followed by a multi-wavelength afterglow. These two distinct components are typically modelled independently and the observational consequences of their interplay are hardly explored. Here we summarize the results of 3D special-relativistic simulations that we have used to investigate the consequences of jet propagation through a realistic environment. We show how the presence of a jet can lead to the macronova being brighter and bluer for on-axis observers in the first few days. Then we show the consequences on the interaction on the shape of the emerging jet. Finally, we will discuss how small scale features in the emerging jet structure can impact the best-fit afterglow parameters.
GECKO: Network of Telescopes and Follow-up Observation of GW190425
Authors: Paek Gregory S.H. , Im Myungshin , Kim Joonho , Lim Gu
Published: February 2023

GW190425 is the second gravitational wave (GW) event caused by a binary neutron star (BNS) merger. We report the result of the follow-up observation of GW190425 by the Gravitational-wave Electromagnetic-wave (EM) Counterpart Korean Observatory (GECKO). Our observation demonstrates that GECKO can detect EM counterpart of a GW170817-like event.