bluuebunny/crossref_metadata_2025_split huggingface dataset:
X-ray flux and spectral variability of the blazar OJ 287 with Suzaku
Authors: Zhou Dongtao , Zhang Zhongli , Gupta Alok C , Kushwaha Pankaj , Wiita Paul J , Gu Minfeng , Xu Haiguang 
Published: July 2024

ABSTRACT
We present analyses of Suzaku XIS light curves and spectra of the BL Lac object OJ 287 with observations positioned primarily around proposed recurrent optical outbursts. The first two observations were performed in 2007 April 10–13 (epoch 1) and 2007 November 7–9 (epoch 2) that, respectively, correspond to a low and a high optical state and which, within the binary supermassive black hole model for OJ 287, precede and follow the impact flare. The last three observations, made consecutively during 2015 May 3–9 (epoch 3), were during the post-impact state of the 2013 disc impact and are the longest continuous X-ray observation of OJ 287 taken before the optical outburst in 2015 December. Intraday variability is found in both the soft (0.5–2 keV) and hard (2–10 keV) bands. The discrete correction function analysis of the light curves in both bands peaks at zero lag during epochs 2 and 3, indicating that the emission in both bands was cospatial and emitted from the same population of leptons. Power spectral densities of all three light curves are red noise dominated, with a rather wide range of power spectrum slopes. These X-ray spectra are overall consistent with power laws but with significantly different spectral indices. In the 2015 observations the X-ray spectrum softens during the flare, showing an obvious soft X-ray excess that was not evident in the 2007 observations. We discuss the implications of these observations on the jet, the possible accretion disc, and the binary supermassive black hole model proposed for the nearly periodic optical flaring of OJ 287.
A two-phase model of galaxy formation: I. The growth of galaxies and supermassive black holes
Authors: Mo Houjun , Chen Yangyao , Wang Huiyuan 
Published: July 2024

ABSTRACT
We develop a model for galaxy formation and the growth of supermassive black holes (SMBHs), based on the fact that cold dark matter haloes form their gravitational potential wells through a fast phase with rapid change in the potential, and that the high universal baryon fraction makes cooled gas in haloes self-gravitating and turbulent before it can form rotation-supported discs. Gas fragmentation produces subclouds so dense that cloud–cloud collision and drag on clouds are not significant, producing a dynamically hot system of subclouds that form stars and move ballistically to feed the central SMBH. Active galactic nucleus (AGN) and supernova feedback is effective only in the fast phase, and the cumulative effects are to regulate star formation and SMBH growth, as well as to reduce the amount of cold gas in haloes to allow the formation of globally stable discs. Using a set of halo assembly histories, we demonstrate that the model can reproduce a number of observations, including correlations among SMBH mass, stellar mass of galaxies and halo mass, the number densities of galaxies and SMBH, as well as their evolution over the cosmic time.
Personal Characteristics Associated With Switching From Cigarettes to Noncombustible Tobacco and Nicotine Products Among U.S. Adults: Findings From PATH Study Waves 1–5
Authors: Sharma Akshika , Kasza Karin A , O’Connor Richard J , Felicione Nicholas J 
Published: July 2024

Abstract

Introduction
Reducing the disease burden from tobacco smoking may encompass switching to noncombustible (NCs), along with cessation. This study evaluates factors associated with switching to NCs (e-cigarettes, smokeless, and snus) versus continued smoking, complete cessation, or dual use.

Aims and Methods
Population Assessment of Tobacco and Health adult data were analyzed in three 2-year wave pairs across 2013–2019 to assess product transitions among people who exclusively smoked tobacco. Generalized estimating equations examined demographics, smoking characteristics, perceptions, and messaging exposure as predictors of transitions from cigarette smoking.

Results
Ages 18–44 years (ref = 65+; aORs = 3.79–5.92), males (aOR = 1.18, 95% CI [1.01, 1.37]), and perceiving NCs as less harmful than smoking (ref = not; aOR = 1.47, 95% CI [1.28, 1.69]) were positively associated with switching to NCs versus continued smoking, while being Black (ref = White; aOR = 0.36, 95% CI [0.26, 0.48]) or Hispanic (ref = non-Hispanic; aOR = 0.59, 95% CI [0.45, 0.78]) were negatively associated. Ages 18–64 years (aORs = 2.49–5.89), noticing promotional ads (ref = not; aOR = 1.34, 95% CI [1.14, 1.58]), daily light or heavy smoking (ref = nondaily; aORs = 2.33–3.72), and smoking within 30 minutes of waking (ref=&gt;30 minutes; aOR = 1.47, 95% CI [1.18, 1.85]) were positively associated with switching to NCs versus cessation, while being Black (aOR = 0.55, 95% CI [0.38, 0.74]) or Hispanic (aOR = 0.52, 95% CI [0.38, 0.71]) were negatively associated. Incomes of $10 000–≥$100 000 (ref ≤ $10 000; aORs = 2.08–3.13) and daily heavy smoking (aOR = 1.96, 95% CI [1.11, 3.48]) were positively associated with switching to NCs versus dual use, while being male (aOR = 0.44, 95% CI [0.29, 0.65]) was negatively associated.

Conclusions
Transitioning to NCs was unequally distributed among sociodemographic groups and smoking characteristics. The mere availability of NCs may not promote health equity. Continued market and regulatory efforts that promote both smoking cessation and transitioning to NCs among various populations may promote public health gains.

Implications
This study examines factors associated with transitioning from smoking to noncombustible tobacco product use. We examined three different product use scenarios that may be associated with varied levels of exposure to harm. We observed that younger ages and perceiving NCs as less harmful than cigarettes were more likely to transition to NCs as compared to continued smoking and cessation, while Black or Hispanic individuals were less likely to transition to NCs. This highlights the need for more focused harm reduction efforts for racial and ethnic minority populations as a complementary strategy to cessation to reduce health disparities from smoking.
Identifying E-cigarette Content on TikTok: Using a BERTopic Modeling Approach
Authors: Lee Juhan , Ouellette Rachel R , Murthy Dhiraj , Pretzer Ben , Anand Tanvi , Kong Grace 
Published: July 2024

Abstract

Introduction
The use of hashtags is a common way to promote e-cigarette content on social media. Analysis of hashtags may provide insight into e-cigarette promotion on social media. However, the examination of text data is complicated by the voluminous amount of social media data. This study used machine learning approaches (ie, Bidirectional Encoder Representations from Transformers [BERT] topic modeling) to identify e-cigarette content on TikTok.

Aims and Methods
We used 13 unique hashtags related to e-cigarettes (eg, #vape) for data collection. The final analytic sample included 12 573 TikTok posts. To identify the best fitting number of topic clusters, we used both quantitative (ie, coherence test) and qualitative approaches (ie, researchers checked the relevance of text from each topic). We, then, grouped and characterized clustered text for each theme.

Results
We evaluated that N = 18 was the ideal number of topic clusters. The 9 overarching themes were identified: Social media and TikTok-related features (N = 4; “duet,” “viral”), Vape shops and brands (N = 3; “store”), Vape tricks (N = 3; “ripsaw”), Modified use of e-cigarettes (N = 1; “coil,” “wire”), Vaping and girls (N = 1; “girl”), Vape flavors (N = 1; “flavors”), Vape and cigarettes (N = 1; “smoke”), Vape identities and communities (N = 1; “community”), and Non-English language (N = 3; Romanian and Spanish).

Conclusions
This study used a machine learning method, BERTopic modeling, to successfully identify relevant themes on TikTok. This method can inform future social media research examining other tobacco products, and tobacco regulatory policies such as monitoring of e-cigarette marketing on social media.

Implications
This study can inform future social media research examining other tobacco products, and tobacco regulatory policies such as monitoring of e-cigarette marketing on social media.
The Public Health Impact of a Ban on Flavored Cigars: A Decision-Theoretic Policy Framework
Authors: Levy David T , Cadham Christopher , Mok Yoonseo , Travis Nargiz , Buszkiewicz James H , Jeon Jihyoun , Fleischer Nancy L , Meza Rafael 
Published: July 2024

Abstract

Introduction
Half of adult cigar users report flavored cigars as their usual brand. The Food and Drug Administration proposed prohibiting “all characterizing flavors in cigars” and “menthol… in cigarettes.” We provide evidence on cigar and cigarette transitions and a framework to assess the impact of a U.S. flavored cigar ban.

Aims and Methods
Using Population Assessment of Tobacco and Health survey waves 1–4, we estimated use patterns and annual transitions among flavored cigars, non-flavored cigars, cigarettes, and among adults aged 18–34 and aged ≥35. We also consider electronic nicotine delivery systems (ENDS)-related transitions. We developed a decision-theoretic framework for examining the impact of a flavored cigar ban alone, and the impact of a flavored cigar with a menthol cigarette ban with and without a non-tobacco flavored ENDS ban.

Results
Cigar users exhibited less stable use than cigarette users, with a large portion of cigar users switching to cigarette use each year. Past studies provide limited information on transitions between cigar and ENDS use. Our policy framework suggests that imposing a flavored cigar ban alone may be partially undermined by the substitution of menthol cigarettes for flavored cigars. While adding a menthol cigarette to a flavored cigar ban is expected to improve public health, a simultaneously implemented ENDS may offset some of the gains.

Conclusions
Our analysis suggests the information necessary to gauge the public health impact of a cigar flavor ban alone and with flavor bans on cigarettes and ENDS. Further research is needed on ENDS vis-a’-vis cigar use, and the impact of enforcement and non-flavor-related policies on flavor ban effectiveness.

Implications
Unlike menthol cigarette use and menthol bans, flavored cigar use and flavored cigar bans have received minimal attention. Transitions from cigars, especially dual and flavored use, are generally common compared to cigarettes. Our policy framework suggests important public health impacts. A flavored cigar ban absent a menthol cigarette ban may be partially undermined by the substitution of menthol cigarettes for flavored cigars. Adding a menthol cigarette ban is expected to offset such substitution and improve public health. However, simultaneously adding an ENDS with a flavored cigar and menthol cigarette ban may reduce the public health impact of a menthol cigarette and cigar flavor ban since flavored cigar users would be less able to substitute a lower-risk alternative.
Olive Oil Consumption, Risk Factors, and Diseases: An Umbrella Review
Authors: Fraga Shyrlei R O , Zago Lilia , Curioni Cintia C 
Published: July 2024

Abstract

Context
Olive oil is a vegetable oil that provides health benefits, including a reduction in free radicals and total cholesterol and prevention of chronic diseases. The escalating incidence of chronic diseases presents a substantial challenge to public health, prompting numerous studies to assess these health-related effects. Despite several systematic reviews and meta-analyses summarizing the association between olive oil consumption and specific health outcomes, there is no summary of the accumulated evidence from these reviews.

Objective
This umbrella review summarizes the evidence on olive oil consumption or intervention in adults and its association with multiple risk factors and diseases.

Data Sources
We retrieved systematic reviews of randomized trials or observational studies on oral interventions or the consumption of olive oil. The systematic search encompassed databases including MEDLINE, Embase, Scopus, Web of Science, LILACS, and CENTRAL from inception to February 6, 2023.

Data Extraction
Two independent reviewers conducted data extraction and assessed methodological quality using the Joanna Briggs Institute tool.

Data Analysis
Overall, 17 systematic reviews of randomized trials and observational studies, covering outcomes such as cardiovascular diseases, cancer, type 2 diabetes, glucose metabolism, inflammatory and oxidative markers, and all-cause mortality, were included. The evidence suggests a beneficial association between olive oil consumption and cardiovascular diseases, cancer, type 2 diabetes, and all-cause mortality. However, the evidence was less definitive for inflammatory markers, oxidative stress, glucose metabolism, and blood lipid outcomes. Several meta-analyses revealed high heterogeneity and wide confidence intervals, along with a limited number of randomized clinical trials.

Conclusion
Given the high heterogeneity and low quality of evidence, further studies involving randomized trials are imperative. Prioritizing an in-depth analysis of specific olive oil components and using a control group with distinct characteristics and different effects is strongly recommended.

Systematic Review Registration
PROSPERO registration no. CRD42022357290.
Skeletal Muscle Index–Based Cachexia Index as a Predictor of Prognosis in Patients With Cancer: A Meta-Analysis and Systematic Review
Authors: Xu Xintian , Tian Mengxing , Ding Chen Chen , Xu Huiting , Wang Huifen , Jin Xin 
Published: July 2024

Abstract

Context
Cachexia is associated with poor survival rates. In the clinical setting, the diagnosis of cancer cachexia is challenging. The cachexia index (CXI), a new index for predicting survival time, is a promising tool for diagnosing cancer cachexia; however, its efficacy in predicting patient survival has not been validated.

Objective
This meta-analysis and systematic review aimed to explore the CXI’s prognostic value in patients with cancer.

Data Sources
The PubMed, Embase, MEDLINE, and Cochrane Library databases were searched for relevant studies to determine the association between CXI findings and prognosis.

Data Extraction
The outcomes were overall survival (OS), progression-, disease-, and recurrence-free survival (PFS/DFS/RFS) rates, and the rate of complete response.

Data Analysis
The QUality In Prognostic Studies (QUIPS) tool was used to evaluate the quality of the included trials. This meta-analysis comprised 14 studies involving 2777 patients. A low CXI was associated with decreased OS (hazard ratio [HR] 2.34, 95% confidence interval [CI] 2.01–2.72; P &lt; .001), PFS/DFS/RFS (HR 1.93, 95% CI 1.68–2.22; P &lt; .001), and complete response (odds ratio [OR] 0.49, 95% CI 0.36–0.66; P &lt; .001). Patients with a low CXI had a lower body mass index (mean difference [MD] −0.75, 95% CI −1.00 to 0.50; P &lt; .001), skeletal muscle index (standardized MD −0.80, 95% CI −0.98 to −0.61; P &lt; .001), and serum albumin level (MD −0.23, 95% CI −0.26 to −0.20; P &lt; .001); and a higher neutrophil–lymphocyte ratio (MD 1.88, 95% CI 1.29–2.47; P &lt; .001) and more advanced disease stages (OR 0.80, 95% CI 0.71–0.91; P = .001).

Conclusion
A low CXI was found to be associated with poor survival in patients with cancer. While the CXI is a promising marker for predicting cancer cachexia, further studies are required to verify its usefulness.
Extreme weather has variable effects on reproductive success of grassland songbirds at the northern extent of their range
Authors: Fisher Ryan J , Davis Stephen K 
Published: July 2024

Abstract
Grassland songbirds breeding in Canada and the United States have experienced significant population declines likely because of habitat loss and degradation. Many climate change models predict an increase in the frequency, intensity, and duration of extreme precipitation and temperature events that could place further pressures on declining species. We monitored the fate of 1,868 individual nesting attempts of 7 grassland songbird species in response to various precipitation and temperature measures over a 10-yr period (1997 to 2002 and 2004 to 2008) in Saskatchewan, Canada. Daily nest survival rates of 5 species, including 3 at-risk species, were negatively influenced by high levels of precipitation, although the amount of precipitation where declines in daily nest survival occurred varied. Daily nest survival rates of 2 species were negatively correlated with high temperatures. We failed to detect any relationship between precipitation or temperature and the number of fledglings produced from successful nests. Extreme weather events could add additional stressors to declining populations of grassland birds in Canada. Increases in the frequency and intensity of extreme weather, specifically extreme precipitation events and short-term high temperatures, will likely lead to lower reproductive success for several species compared to current levels. This may be especially problematic for management of Anthus spragueii (Sprague’s Pipit) and Centronyx bairdii (Baird’s Sparrow), where a large proportion (&gt; 75%) of the breeding population occurs near the northern edge of the Great Plains. The continuing loss and degradation of northern grasslands may limit the ability of these species to disperse and find favorable climate conditions.
Variation in defensive spines across juvenile instars of Daphnia magna
Authors: Diel Patricia , Kiene Marvin , Laforsch Christian 
Published: July 2024

Abstract
Various species of freshwater zooplankton feature defensive spines, spikes or spinules across a comparatively wide size range. Among those is Daphnia magna, which has previously been found to express an enhanced spinescence in response to the predatory tadpole shrimp Triops cancriformis. This involves an elongated tail-spine, further protruding fornices and elongated, as well as further spread spinules along its carapace margins. Of these, the predator-induced trait changes concerning the spinules of D. magna at the age of first reproduction are known. However, their morphological development throughout the juvenile instars, in comparison to the changes of the prominent tail spine during the same periods, has thus far been unclear. Our study shows that D. magna expresses spinules across all investigated juvenile instars. Furthermore, during ontogeny, the development of D. magna’s rather small spinescence traits, i.e. the dorsal and ventral mean spinule length, as well as the dorsal spinules bearing area, in response to predation pressure, differs distinctly from that of the prominent tail-spine. Thus, our study provides further insight into the connectedness of traits contributing to the overall defensively enhanced spinescence of D. magna, with possible implications for the functional benefit of the traits at certain developmental periods.
Unpacking polarization: Antagonism and alignment in signed networks of online interaction
Authors: Fraxanet Emma , Pellert Max , Schweighofer Simon , Gómez Vicenç , Garcia David 
Published: July 2024

Abstract
Political conflict is an essential element of democratic systems, but can also threaten their existence if it becomes too intense. This happens particularly when most political issues become aligned along the same major fault line, splitting society into two antagonistic camps. In the 20th century, major fault lines were formed by structural conflicts, like owners vs. workers, center vs. periphery, etc. But these classical cleavages have since lost their explanatory power. Instead of theorizing new cleavages, we present the FAULTANA (FAULT-line Alignment Network Analysis) pipeline, a computational method to uncover major fault lines in data of signed online interactions. Our method makes it possible to quantify the degree of antagonism prevalent in different online debates, as well as how aligned each debate is to the major fault line. This makes it possible to identify the wedge issues driving polarization, characterized by both intense antagonism and alignment. We apply our approach to large-scale data sets of Birdwatch, a US-based Twitter fact-checking community and the discussion forums of DerStandard, an Austrian online newspaper. We find that both online communities are divided into two large groups and that their separation follows political identities and topics. In addition, for DerStandard, we pinpoint issues that reinforce societal fault lines and thus drive polarization. We also identify issues that trigger online conflict without strictly aligning with those dividing lines (e.g. COVID-19). Our methods allow us to construct a time-resolved picture of affective polarization that shows the separate contributions of cohesiveness and divisiveness to the dynamics of alignment during contentious elections and events.
Stress, job satisfaction, and workplace climate in Italian police workers
Authors: Maran Daniela Acquadro , Grandi Annalisa , Colombo Lara 
Published: July 2024

Abstract:Police job, because of its inherent characteristics, predisposes to work in stressful contexts on a daily basis. The features of the work environment, such as a good organizational climate, could play an important role in maintaining a good level of job satisfaction. The aim of the present study is to investigate, using OLS regressions, which climate dimensions predict job satisfaction and stress in a sample of police workers (N = 665) in Northern Italy. In addition, the differences between groups in terms of organizational climate and stress are examined, especially in relation to role (police officers vs. other roles) and gender. Results showed that all dimensions of workplace climate (except fairness, autonomy and communication) were positively and significantly associated with job satisfaction, while job description, job involvement, team and leadership were negatively and significantly associated with stress. Compared to the differences between groups, police officers showed significantly more critical scores on most of the variables included in the analyses (workplace climate and stress); in terms of gender, women showed more negative scores on stress symptoms (relational problems, emotional distress and physical problems) and more positive perceptions of organizational fairness. This study offers new insights into the critical role of police officers and gender differences in the police force. The importance of supporting and maintaining a good organizational climate in such a critical profession is also confirmed.
Why regulations on empirical claims in the media are justified
Authors: Park John J 
Published: July 2024

Abstract
In light of rampant fake news and disinformation in today's press and social media, I provide a new consequentialist argument that regulations on the media pertaining to certain false verifiable empirical facts are warranted. This contention is based in part on a collection of pre-existing empirical findings that I newly piece together from political science and psychology demonstrating that a post-truth society is likely with current media. My position is then defended from several counters, such as that it violates deontological rights to free speech and to freedom of the press, that free speech leads to the acquisition of truth, and that government regulators can be biased and corrupt.
Persistence without essence
Authors: Leech Jessica 
Published: July 2024

Abstract
Questions of persistence and change are central to metaphysics. There is almost always a role for sortal or essential properties to play in theories of persistence. However, one might reasonably be suspicious of many of the claims about sortal properties and essential properties on which so many accounts of persistence conditions rest. The aim of this paper is to think through what persistence looks like if we don't help ourselves to these assumptions. In so doing, we shall uncover a deep and difficult problem when it comes to identity facts and their relation to qualitative facts. Towards the end of the paper, I sketch a potential line of response that builds upon our seeming awareness of a genuinely persisting self.