bluuebunny/crossref_metadata_2025_split huggingface dataset:
The environmental dependence of X-ray AGN activity at z ∼ 0.4
Authors: Noordeh E , Canning R E A , King A , Allen S W , Mantz A , Morris R G , Ehlert S , von der Linden A , Brandt W N , Luo B , Xue Y Q , Kelly P 
Published: September 2020

ABSTRACT
We present an analysis of the X-ray active galactic nucleus (AGN) population in a sample of seven massive galaxy clusters in the redshift range 0.35 &lt; z &lt; 0.45. We utilize high-quality Chandra X-ray imaging to robustly identify AGN and precisely determine cluster masses and centroids. Follow-up VIsible Multi-Object Spectrograph optical spectroscopy allows us to determine which AGN are cluster members. Studying the subset of AGN with 0.5–8 keV luminosities &gt;6.8 × 1042 erg s−1, within r ≤ 2r500 (approximately the virial radius), we find that the cluster AGN space density scales with cluster mass as $\sim M^{-2.0^{+0.8}_{-0.9}}$. This result rules out zero mass dependence of the cluster X-ray AGN space density at the 2.5σ level. We compare our cluster X-ray AGN sample to a control field with identical selection and find that the cluster AGN fraction is significantly suppressed relative to the field when considering the brightest galaxies with V &lt; 21.5. For fainter galaxies, this difference is not present. Comparing the X-ray hardness ratios of cluster member AGN to those in the control field, we find no evidence for enhanced X-ray obscuration of cluster member AGN. Lastly, we see tentative evidence that disturbed cluster environments may contribute to enhanced AGN activity.
Gravitational waves from SGRs and AXPs as fast-spinning white dwarfs
Authors: Sousa Manoel F , Coelho Jaziel G , de Araujo José C N 
Published: September 2020

ABSTRACT
In our previous article we have explored the continuous gravitational waves (GWs) emitted from rotating magnetized white dwarfs (WDs) and their detectability by the planned GW detectors such as Laser Interferometer Space Antenna (LISA), Deci-hertz Interferometer Gravitational wave Observatory (DECIGO), and Big Bang Observer (BBO). Here, GWs’ emission due to magnetic deformation mechanism is applied for soft gamma repeaters (SGRs) and anomalous X-ray pulsars (AXPs), described as fast-spinning and magnetized WDs. Such emission is caused by the asymmetry around the rotation axis of the star generated by its own intense magnetic field. Thus, for the first time in the literature, the GW counterparts for SGRs/AXPs are described as WD pulsars. We find that some SGRs/AXPs can be observed by the space detectors BBO and DECIGO. In particular, 1E 1547.0−5408 and SGR 1806−20 could be detected in 1 yr of observation, whereas SGR 1900+14, CXOU J171405.7−381031, Swift J1834.9−0846, SGR 1627−41, PSR J1622−4950, SGR J1745−2900, and SGR 1935+2154 could be observed with a 5-yr observation time. The sources XTE J1810−197, SGR 0501+4516, and 1E 1048.1−5937 could also be seen by BBO and DECIGO if these objects have $M_{\mathrm{ WD}} \lesssim 1.3 \, \mathrm{M}_{\odot }$ and $M_{\mathrm{ WD}} \lesssim 1.2 \, \mathrm{M}_{\odot }$, respectively. We also found that SGRs/AXPs as highly magnetized neutron stars are far below the sensitivity curves of BBO and DECIGO. This result indicates that a possible detection of continuous GWs originated from these objects would corroborate the WD pulsar model.
A deep learning view of the census of galaxy clusters in IllustrisTNG
Authors: Su Y , Zhang Y , Liang G , ZuHone J A , Barnes D J , Jacobs N B , Ntampaka M , Forman W R , Nulsen P E J , Kraft R P , Jones C 
Published: September 2020

ABSTRACT
The origin of the diverse population of galaxy clusters remains an unexplained aspect of large-scale structure formation and cluster evolution. We present a novel method of using X-ray images to identify cool core (CC), weak cool core (WCC), and non-cool core (NCC) clusters of galaxies that are defined by their central cooling times. We employ a convolutional neural network, ResNet-18, which is commonly used for image analysis, to classify clusters. We produce mock Chandra X-ray observations for a sample of 318 massive clusters drawn from the IllustrisTNG simulations. The network is trained and tested with low-resolution mock Chandra images covering a central 1 Mpc square for the clusters in our sample. Without any spectral information, the deep learning algorithm is able to identify CC, WCC, and NCC clusters, achieving balanced accuracies (BAcc) of 92 per cent, 81 per cent, and 83 per cent, respectively. The performance is superior to classification by conventional methods using central gas densities, with an average ${\rm BAcc}=81{{\ \rm per\ cent}}$, or surface brightness concentrations, giving ${\rm BAcc}=73{{\ \rm per\ cent}}$. We use class activation mapping to localize discriminative regions for the classification decision. From this analysis, we observe that the network has utilized regions from cluster centres out to r ≈ 300 kpc and r ≈ 500 kpc to identify CC and NCC clusters, respectively. It may have recognized features in the intracluster medium that are associated with AGN feedback and disruptive major mergers.
On the road to per cent accuracy IV: ReACT – computing the non-linear power spectrum beyond ΛCDM
Authors: Bose Benjamin , Cataneo Matteo , Tröster Tilman , Xia Qianli , Heymans Catherine , Lombriser Lucas 
Published: September 2020

ABSTRACT
To effectively exploit large-scale structure surveys, we depend on accurate and reliable predictions of non-linear cosmological structure formation. Tools for efficient and comprehensive computational modelling are therefore essential to perform cosmological parameter inference analyses. We present the public software package ReACT, demonstrating its capability for the fast and accurate calculation of non-linear power spectra from non-standard physics. We showcase ReACT through a series of analyses on the DGP and f(R) gravity models, adopting LSST-like cosmic shear power spectra. Accurate non-linear modelling with ReACT has the potential to more than double LSST’s constraining power on the f(R) parameter, in contrast to an analysis that is limited to the quasi-linear regime. We find that ReACT is sufficiently robust for the inference of consistent constraints on theories beyond ΛCDM for current and ongoing surveys. With further improvement, particularly in terms of the accuracy of the non-linear ΛCDM power spectrum, ReACT can, in principle, meet the accuracy requirements for future surveys such as Euclid and LSST.
Observing protoplanetary discs with the Square Kilometre Array – I. Characterizing pebble substructure caused by forming planets
Authors: Ilee John D , Hall Cassandra , Walsh Catherine , Jiménez-Serra Izaskun , Pinte Christophe , Terry Jason , Bourke Tyler L , Hoare Melvin 
Published: September 2020

ABSTRACT
High-angular-resolution observations of discs at mm wavelengths (on scales of a few au) are now commonplace, but there is a current lack of a comparable angular resolution for observations at cm wavelengths. This presents a significant barrier to improving our understanding of planet formation, in particular how dust grains grow from mm to cm sizes. In this paper, we examine the ability of the Square Kilometre Array (SKA) to observe dust substructure in a young, planet-forming disc at cm wavelengths. We use dusty hydrodynamics and continuum radiative transfer to predict the distribution and emission of 1-cm dust grains (or pebbles) within the disc, and simulate continuum observations with the current SKA1-MID design baseline at frequencies of 12.5 GHz (Band 5b, ∼2.4 cm) on 5–10 au scales. The SKA will provide high-fidelity observations of the cm dust emission substructure in discs for integration times totalling hundreds of hours. Radial structure can be obtained at a sufficient resolution and S/N from shorter (tens of hours) integration times by azimuthal averaging in the image plane. By modelling the intensity distribution directly in the visibility plane, it is possible to recover a similar level of (axisymmetric) structural detail from observations with integration times one to two orders of magnitude lower than required for high-fidelity imaging. Our results demonstrate that SKA1-MID will provide crucial constraints on the distribution and morphology of the raw material for building planets, the pebbles in protoplanetary discs.
Systematic Review of Electronic Cigarette Use (Vaping) and Mental Health Comorbidity Among Adolescents and Young Adults
Authors: Becker Timothy D , Arnold Melanie K , Ro Vicky , Martin Lily , Rice Timothy R 
Published: September 2020

Abstract

Introduction
The prevalence of electronic cigarette (EC) use has risen dramatically among adolescents and young adults (AYA, ages 12–26) over the past decade. Despite extensive established relationships between combustible cigarette use and mental health problems, the mental health comorbidities of EC use remain unclear.

Aims and Methods
To provide a systematic review of existing literature on mental health comorbidities of EC use among AYA. Database searches using search terms related to EC, AYA, and mental health identified 1168 unique articles, 87 of which prompted full-text screening. Multiple authors extracted data, applied the Effective Public Health Practice Project Quality Assessment Tool to evaluate the evidence, and synthesized findings.

Results
Forty articles met eligibility criteria (n = 24 predominantly adolescent and 16 predominantly young adult). Analyses yielded three main categories of focus: internalizing disorders (including depression, anxiety, suicidality, eating disorders, post-traumatic stress disorder), externalizing disorders (attention-deficit/hyperactivity disorder and conduct disorder), and transdiagnostic concepts (impulsivity and perceived stress). Significant methodological limitations were noted.

Conclusions
Youth EC use is associated with greater mental health problems (compared with nonuse) across several domains, particularly among adolescents. Because many existing studies are cross-sectional, directionality remains uncertain. Well-designed longitudinal studies to investigate long-term mental health sequelae of EC use remain needed.

Implications
Forty recent studies demonstrate a variety of mental health comorbidities with AYA EC use, particularly among adolescents. Mental health comorbidities of EC use generally parallel those of combustible cigarette use, with a few exceptions. Future EC prevention and treatment strategies may be enhanced by addressing mental health.
Anti-inflammatory effects of oral supplementation with curcumin: a systematic review and meta-analysis of randomized controlled trials
Authors: Ferguson Jessica J A , Abbott Kylie A , Garg Manohar L 
Published: September 2020

AbstractContextChronic inflammation is a major contributor to the development of noncommunicable diseases. Curcumin, a bioactive polyphenol from turmeric, is a well-known anti-inflammatory agent in preclinical research. Clinical evidence remains inconclusive because of discrepancies regarding optimal dosage, duration, and formulation of curcumin.ObjectiveThe aim of this systematic review, conducted and reported in accordance with Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines and checklist, was to evaluate the efficacy of curcumin supplementation on systemic inflammatory mediators, comparing dose, duration, and bioavailability status of interventions.Data SourcesThe Medline, CINAHL, EMBASE, Scopus, and Cochrane literature databases were searched from 1980 to May-end 2019. Randomized controlled trials investigating effects of dietary curcumin on inflammatory mediators in humans not receiving anti-inflammatory treatment were eligible for inclusion. Two authors independently assessed titles and abstracts of identified articles for potential eligibility and respective, retrieved, full-text articles; disagreements were resolved by a third author. Evidence quality was critically appraised using the Quality Criteria Checklist for Primary Research.Data ExtractionThirty-two trials (N = 2,038 participants) were included and 28 were meta-analyzed using a random-effects model; effect sizes were expressed as Hedges’ g (95%CI).Data AnalysisPooled data (reported here as weighted mean difference [WMD]; 95%CI) showed a reduction in C-reactive protein (−1.55 mg/L; −1.81 to −1.30), interleukin-6 (−1.69 pg/mL, −2.56 to −0.82), tumor necrosis factor α (−3.13 pg/mL; −4.62 to −1.64), IL-8 (−0.54 pg/mL; −0.82 to −0.28), monocyte chemoattractant protein-1 (−2.48 pg/mL; −3.96 to −1.00), and an increase in IL-10 (0.49 pg/mL; 0.10 to 0.88), with no effect on intracellular adhesion molecule-1.ConclusionThese findings provide evidence for the anti-inflammatory effects of curcumin and support further investigation to confirm dose, duration, and formulation to optimize anti-inflammatory effects in humans with chronic inflammation.Systematic Review RegistrationPROSPERO registration no. CRD42019148682.
Presenteeism among workers: health-related factors, work-related factors and health literacy
Authors: Goto E , Ishikawa H , Okuhara T , Ueno H , Okada H , Fujino Y , Kiuchi T 
Published: September 2020

Abstract

Background
Presenteeism is an important factor in workers’ health. However, few studies have examined how variables such as socio-economic status, health status, workplace status and health literacy correlate with and affect presenteeism.

Aims
To assess the correlates of presenteeism with a focus on health-related factors, work-related factors and health literacy.

Methods
We conducted a cross-sectional study of 2914 Japanese workers from one company. We used a self-administered questionnaire to assess socio-demographic characteristics, health status, work environment, presenteeism and health literacy.

Results
Forty-one per cent of participants were under 40 years of age and 70% were male. We found that 59% of the participants were at high risk of presenteeism. Presenteeism was associated with sex, age, household income, marital status, health-related factors (i.e. self-rated health status, dietary choices, exercise habits), work-related factors (i.e. workplace support, job demands, job control) and health literacy. Logistic regression analyses indicated that presenteeism was associated with self-rated health status, overtime hours, workplace support, job demands, job control and health literacy after adjusting for sex, age and income.

Conclusions
Health-related factors, work-related factors and health literacy are all associated with presenteeism. Improving the workplace environment, especially factors such as overtime working hours, workplace support, job demands and job control, and increasing health literacy may reduce presenteeism among general office workers.
Musculoskeletal disorders and level of physical activity in welders
Authors: Weyh C , Pilat C , Krüger K 
Published: September 2020

Abstract

Background
Welders demonstrate a high prevalence of musculoskeletal disorders (MSDs), as indicated by high rates of illness-related absenteeism. Leisure time physical activity (LTPA) could be a preventive strategy. However, little is known about LTPA prevalence and its association with MSDs among welders.

Aims
The aim of this study was to analyse the prevalence of MSD and LTPA levels among welders and to identify risk factors for the main disorder of low back pain (LBP).

Methods
The following data were collected from 145 welders from 34 companies in the German steel industry: individual factors (demographics, health behaviour), job-related factors (welding process, welding hours per day, employment years, shift work, ergonomic tools) and MSD (Nordic questionnaire). LTPA (International Physical Activity Questionnaire) was calculated to determine the metabolic equivalent of task (MET) per week as an objective measure of energy expenditure. Prevalence and multivariate regression analysis were calculated to determine odds ratios (ORs).

Results
The 12-month prevalence of LBP was 71%, for neck pain 61% and for shoulder pain 55%. Forty-two per cent of the participants accumulated &lt;600 MET/week. The multivariate regression model revealed LTPA &lt;600 MET/week (OR 3.4, 95% CI 1.05–10.85) and neck pain in the previous 12 months (OR 5.2, 95% CI 2.02–13.56) to be significantly associated with LBP.

Conclusions
The results show a high prevalence of MSDs and thus a strong requirement for intervention. Therefore, LTPA should be prioritized and employers should encourage access to regular activity.
Information Dispersion across Employees and Stock Returns
Authors: Agrawal Ashwini , Hacamo Isaac , Hu Zhongchen 
Published: September 2020

Abstract
Rank-and-file employees are becoming increasingly critical for many firms, yet we know little about how their employment dynamics matter for stock prices. We analyze new data from the individual CV’s of public company employees and find that rank-and-file labor flows can be used to predict abnormal stock returns. Accounting data and survey evidence indicate that workers’ labor market decisions reflect information about future corporate earnings. Investors, however, do not appear to fully incorporate this information into their earnings expectations. The findings support the hypothesis that rank-and-file employees’ entry and exit decisions reveal valuable insights into their employers’ future stock performance.
Factors Affecting Household Disaster Preparedness Among Foreign Residents in Japan
Authors: GREEN David , LINLEY Matthew , WHITNEY Justin , SANO Yae 
Published: September 2020

AbstractJapan is a country known both for its devastating natural disasters and its high level of community preparedness. However, while demographic pressures stemming from an aging society have led to a growing foreign population, scholars have paid little attention to understanding the levels of disaster preparedness exhibited by this group. Using representative data from the 2015 Nagoya City Foreign Resident Survey, this article is the first to explore variations in household disaster preparedness among Japan’s foreign residents. Although numerous factors were found to affect preparedness, the most important appear to be national origin, experience with disaster training, and exposure to disaster information. Japanese language proficiency, perhaps surprisingly, was of minor importance. We thus argue that a person’s cultural background and their exposure to information about local hazards affect their ability to identify and assess risk, which increases the likelihood that they will prepare their household for emergencies. This study not only provides insight into what might drive preparedness activities within foreign populations but also helps explain how migrants obtain disaster information. Its main implication is that Japan’s disparate migrant populations require a strategically varied approach when considering interventions to address disaster vulnerability.
Incidence of Traumatic Spinal Fractures in the Netherlands
Authors: Smits Arjen J. , Ouden Lars P. den , Deunk Jaap , Bloemers Frank W. 
Published: September 2020

Study Design.
Retrospective database study based on prospectively collected data.

Objective.
The aim of this study was to describe the current incidence and epidemiology of traumatic spinal fractures in the Netherlands

Summary of Background Data.
Traumatic spinal fractures may lead to severe disability and have considerable consequences on healthcare capacity and costs. Several studies have reported a large and increasing share of fractures in elderly. Currently, a reliable, detailed, and up to date incidence of these injuries in the Netherlands is lacking. These numbers could aid in the composition of preventative measures.

Methods.
All patients from 2010 to 2017 that were admitted with a spinal fracture were included. Patients were selected based on Abbreviated Injury Scores (AIS) codes. Collected data consisted of patient- and injury characteristics, afflicted spine-region, associated injury, referral- and discharge location, and geographic region of admittance.

Results.
Overall, 29,637 patients were included in this study. The incidence of spinal fractures increased from 2010 to 2017 (from 21.5 to 24.0 per 100,000 inhabitants). Most patients were injured by a (low-energy) fall from the same level followed by (high-energy) traffic accidents. Elderly patients (≥65 years of age) made up 42% of all patients. The proportion of elderly increased significantly faster over the years compared to younger patients. More than half of polytrauma (injury severity score ≥16) patients had fractures in multiple spine regions. 5,5% of all patients suffered spinal cord injury (SCI), most often associated with cervical fractures in polytrauma patients. Regional differences were found mainly in presentation through referral and low- and high-energy falls.

Conclusion.
The incidence of patients with spinal fractures increased and elderly made up a large part. Preventative measures could be regional dependent and should focus on low-energy falls, traffic accidents, and bicycle accidents in specific. In polytraumatized patients there should be special attention for any additional spine fractures and SCI.

Level of Evidence: 3
Restoration of Thoracic Kyphosis in Adolescent Idiopathic Scoliosis Over a Twenty-year Period: Are We Getting Better?
Authors: Bodendorfer Blake M. , Shah Suken A. , Bastrom Tracey P. , Lonner Baron S. , Yaszay Burt , Samdani Amer F. , Miyanji Firoz , Cahill Patrick J. , Sponseller Paul D. , Betz Randal R. , Clements David H. , Lenke Lawrence G. , Shufflebarger Harry L. , Marks Michelle C. , Newton Peter O. 
Published: September 2020

Study Design.
A multicenter, prospectively collected database of 20 years of operatively treated adolescent idiopathic scoliosis (AIS) was utilized to retrospectively examine pre- and postoperative thoracic kyphosis at 2-year follow-up.

Objective.
To determine if the adoption of advanced three-dimensional correction techniques has led to improved thoracic kyphosis correction in AIS.

Summary of Background Data.
Over the past 20 years, there has been an evolution of operative treatment for AIS, with more emphasis on sagittal and axial planes. Thoracic hypokyphosis was well treated with an anterior approach, but this was not addressed sufficiently in early posterior approaches. We hypothesized that patients with preoperative thoracic hypokyphosis prior to 2000 would have superior thoracic kyphosis restoration, but the learning curve with pedicle screws would reflect initially inferior restoration and eventual improvement.

Methods.
From 1995 to 2015, 1063 patients with preoperative thoracic hypokyphosis (<10°) were identified. A validated formula for assessing three-dimensional sagittal alignment using two-dimensional kyphosis and thoracic Cobb angle was applied. Patients were divided into 1995–2000 (Period 1, primarily anterior), 2001–2009 (Period 2, early thoracic pedicle screws), and 2010–2015 (Period 3, modern posterior) cohorts. Two-way repeated measures analysis of variance and post-hoc Bonferroni corrections were utilized with P < 0.05 considered significant.

Results.
Significant differences were demonstrated. Period 1 had excellent restoration of thoracic kyphosis, which worsened in Period 2 and improved to near Period 1 levels during Period 3. Period 3 had superior thoracic kyphosis restoration compared with Period 2.

Conclusion.
Although the shift from anterior to posterior approaches in AIS was initially associated with worse thoracic kyphosis restoration, this improved with time. The proportion of patients restored to >20° kyphosis with a contemporary posterior approach has steadily improved to that of the era when anterior approaches were more common.

Level of Evidence: 3