bluuebunny/crossref_metadata_2025_split huggingface dataset:
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

ABSTRACTThe 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

ABSTRACTThis 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

AbstractWe 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

AbstractLeisure 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

Abstract
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

AbstractThe 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

AbstractBackground: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

AbstractSite 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.
Quinductor: A multilingual data-driven method for generating reading-comprehension questions using Universal Dependencies
Authors: Kalpakchi Dmytro , Boye Johan 
Published: February 2023

AbstractWe 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

Abstract

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

AbstractThis 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

AbstractA 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

AbstractWe 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

AbstractSingle 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

AbstractIn 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

AbstractGW190425 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.
Magnetorotational core-collapse supernovae: the impact of the magnetic field’s structure
Authors: Bugli Matteo , Guilet Jérôme , Obergaulinger Martin 
Published: February 2023

AbstractThe combination of strong magnetic fields and fast rotation is often invoked as a characteristic of the central engine for outstanding sources such as GRBs, hypernovae, and superluminous supernovae. However, the actual properties of the magnetic field during the collapse of the stellar progenitor are very uncertain, since they depend on the evolution of the star and can be affected by complex dynamo processes occurring in the central proto-neutron star. Using 3D relativistic MHD models we show that higher-order multipolar fields can lead to the onset of a supernova, although they tend to produce less energetic explosions and less collimated outflows. Quadrupolar fields efficiently extract angular momentum from the central core, but the rotational energy is partly stored in the equatorial regions, rather than powering up the polar outflows. Finally, our results show a strong magnetic quenching of the hydrodynamic non-axisymmetric instabilities that are associated to the emission of GWs.
Observations of Gravitational-wave Afterglows
Authors: Corsi Alessandra 
Published: February 2023

AbstractGW170817, the merger of two neutron stars witnessed through both its gravitational wave siren and its glow at all wavelengths of light, represents the first multi-messenger detection of a compact binary merger. The association of the GW in-spiral signal from GW170817 with a γ-ray burst, a kilonova, and a non-thermal afterglow spanning all bands of the electromagnetic spectrum, has provided rich constraints on the physics and astrophysics of neutron stars. Starting from the example of GW170817, I briefly summarize recent results on observations of electromagnetic afterglows from gravitational wave triggers. In the light of these results, I highlight some key questions that are yet to be answered after the GW170817 discovery. I conclude by commenting briefly on some opportunities that lie in front of us, as improvements in ground-based gravitational wave detectors’ sensitivities will transform a trickle of multi-messenger discoveries into a flood, bringing the field of gravitational wave astronomy from its infancy to its maturity.
GRB 170817A and the long-term aftermath of neutron star mergers
Authors: van Eerten Hendrik 
Published: February 2023

AbstractGW170817/GRB 170817A has had a huge impact on our understanding of gamma-ray burst (GRB) afterglows, and has prompted a huge sustained effort at modeling the details of the geometry and emission from GRB jets. While no additional electro-magnetic counterparts have been detected to gravitational wave emission from neutron star mergers so far, it is certainly reasonable to expect further detections in the future. Whether these will be very similar in nature to GRB 170817A or instead will provide us with samplings of afterglow model parameters across a wide parameter space remains an open question. In this presentation I will survey some of the work done by the various active groups worldwide in theoretical modeling and understanding afterglows post 170817A.