bluuebunny/crossref_metadata_2025_split huggingface dataset:
Calibrating the metallicity of M dwarfs in wide physical binaries with F-, G-, and K-primaries – II: carbon, oxygen, and odd-Z iron-peak abundances of the primary stars
Authors: Duque-Arribas C , Tabernero H M , Montes D , Caballero J A 
Published: January 2024

ABSTRACT
Detailed chemical composition of stars is of prime interest for a range of topics in modern stellar astrophysics, such as the chemical evolution of the Galaxy or the formation, composition, and structure of exoplanets. In this work, we derive the C and O abundances and update Sc, V, Mn, and Co abundances considering hyperfine structure effects and correcting for non-local thermodynamical equilibrium for a sample of 196 late-F, G-, and early-K stars with wide resolved M-dwarf companions. We accomplished this by employing the equivalent width method and high-resolution spectroscopic data. Furthermore, we investigated the distributions of [X/Fe] ratios and [C/O] as a function of metallicity ([Fe/H]) and kinematic population. The observed trends are consistent with previous findings reported in the literature. Additionally, we searched for confirmed exoplanets around our primary stars in the literature and found 24 exoplanets in 17 systems, while none of the M-dwarf companions in our sample presented confirmed exoplanets. In conclusion, our study provides homogeneous abundances from high-resolution spectra for a large sample of FGK primary stars, paving the way for further research on stellar abundances of the M secondaries and exoplanetary science.
Data-driven scale identification in oscillatory dynamos
Authors: Guseva Anna 
Published: January 2024

ABSTRACTParker’s mean-field model includes two processes generating large-scale oscillatory dynamo waves: stretching of magnetic field lines by small-scale helical flows and by differential rotation. In this work, we investigate the capacity of data-driven modal analysis, dynamic mode decomposition (DMD), to identify coherent magnetic field structures of this model. In its canonical form, the only existing field scale corresponds to the dynamo instability. To take into account multiscale nature of the dynamo, the model was augmented with coherent in time flow field, forcing small-scale magnetic field with a faster temporal evolution. Two clusters of DMD modes were obtained: the ‘slow’ cluster, located near the dynamo wave frequency and associated with its non-linear self-interaction, and the ‘fast’ cluster, centred around the forcing frequency and resulting from the interaction between the wave and the flow. Compared to other widely used methods of data analysis, such as Fourier transform, DMD provides a natural spatiotemporal basis for the dynamo, related to its non-linear dynamics. We assess how the parameters of the DMD model, rank, and delay, influence its accuracy, and finally discuss the limitations of this approach when applied to randomly forced, more complex dynamo flows.
High-resolution spectroscopic study of extremely metal-poor stars in the Large Magellanic Cloud
Authors: Oh W S , Nordlander T , Da Costa G S , Bessell M S , Mackey A D 
Published: January 2024

ABSTRACT
We present detailed abundance results based on Ultraviolet and Visual Echelle Spectrograph high-dispersion spectra for seven very and extremely metal-poor stars in the Large Magellanic Cloud (LMC). We confirm that all seven stars, two of which have [Fe/H] ≤ −3.0, are the most metal-poor stars discovered so far in the Magellanic Clouds. The element abundance ratios are generally consistent with Milky Way halo stars of similar [Fe/H] values. We find that two of the more metal-rich stars in our sample are enhanced in r-process elements. This result contrasts with the literature, where all nine metal-poor LMC stars with higher [Fe/H] values than our sample were found to be rich in r-process elements. The absence of r-process enrichment in stars with lower [Fe/H] values is consistent with a minimum delay time-scale of ∼100 Myr for the neutron star binary merger process to generate substantial r-process enhancements in the LMC. We find that the occurrence rate of r-process enhancement (r-I or r-II) in our sample of very and extremely metal-poor stars is statistically indistinguishable from that found in the Milky Way’s halo, although including stars from the literature sample hints at a larger r-II frequency the LMC. Overall, our results shed light on the earliest epochs of star formation in the LMC that may be applicable to other galaxies of LMC-like mass.
X-ray properties of reverberation-mapped AGNs with super-Eddington accreting massive black holes
Authors: Maithil Jaya , Brotherton Michael S , Shemmer Ohad , Luo Bin , Du Pu , Wang Jian-Min , Hu Chen , Gallagher Sarah C , Li Yan-Rong , Nemmen Rodrigo S 
Published: January 2024

ABSTRACT
X-ray properties of active galactic nuclei (AGNs) depend on their underlying physical parameters, particularly the accretion rate. We identified eight reverberation-mapped AGNs with some of the largest known accretion rates without high-quality X-ray data. We obtained new Chandra ACIS-S X-ray observations and nearly simultaneous optical spectrophotometry to investigate the properties of these AGNs with extreme super-Eddington accreting massive black holes (SEAMBHs). We combined our new X-ray measurements with those of other reverberation-mapped AGNs, which have the best-determined masses and accretion rates. The trend of the steepening of the spectral slope between X-ray and optical-UV, αox, with increasing optical-UV luminosity, $L_{\rm 2500{\mathring{\rm A}}}$, holds true for even the most extreme SEAMBHs. One of our new SEAMBHs appears X-ray-weak for its luminosity, perhaps due to absorption associated with orientation effects involving a slim disc thought to be present in highly accreting systems. The correlation of the $\rm 2\!-\!8~ keV$ X-ray photon index with the accretion rate also holds for the extreme SEAMBHs, which show some of the largest photon indices reported for AGNs.
New insights into the role of AGNs in forming the cluster red sequence
Authors: Shimakawa Rhythm , Pérez-Martínez Jose Manuel , Koyama Yusei , Tanaka Masayuki , Tanaka Ichi , Kodama Tadayuki , Hatch Nina A , Röttgering Huub J A , Dannerbauer Helmut , Kurk Jaron D 
Published: January 2024

ABSTRACT
As a considerable investment of time from various telescope facilities was dedicated toward studying the Spiderweb protocluster at z = 2.2, it so far remains one of the most extensively studied protocluster. We report here the latest results in this field, adding a new dimension to previous research on cluster formation at high redshift. Previous studies have reported a significant overdensity (δ ∼ 10) of massive Hα (+ [N ii])-emitting galaxies in 3700 comoving Mpc3. Many of these were previously considered to be dusty, actively star-forming galaxies, given their rest-frame optical and infrared features. However, this study argues that a third of them are more likely to be ‘passively evolving’ galaxies with low-luminosity active galactic nuclei (AGNs) rather than star-forming galaxies, given the multiwavelength spectral energy distribution (SED) fitting including an AGN component. For their SED-based star formation rates to be valid, bulk of their Hα + [N ii] emission should come from the central AGNs. This difference in interpretation between this work and past studies, including ours, is particularly supported by the recent deep Chandra/X-ray observation. Furthermore, we have spectroscopically confirmed a quiescent nature for one of these AGNs, with its multiple stellar absorption lines but also low-ionization emission lines. This important update provides new insights into the role of AGNs in forming the cluster red sequence observed in the present-day universe.
Single-cell genomics analysis reveals complex genetic interactions in an in vivo model of acquired BRAF inhibitor resistance
Authors: Schillo Jacob L , Feddersen Charlotte R , Peplinski Rebekah M , Powell Lexy S , Varzavand Afshin , Stipp Christopher S , Riordan Jesse D , Dupuy Adam J 
Published: January 2024

Abstract
The evolution of therapeutic resistance is a major obstacle to the success of targeted oncology drugs. While both inter- and intratumoral heterogeneity limit our ability to detect resistant subpopulations that pre-exist or emerge during treatment, our ability to analyze tumors with single-cell resolution is limited. Here, we utilized a cell-based transposon mutagenesis method to identify mechanisms of BRAF inhibitor resistance in a model of cutaneous melanoma. This screen identified overexpression of NEDD4L and VGLL3 as significant drivers of BRAF inhibitor resistance in vivo. In addition, we describe a novel single-cell genomics profiling method to genotype thousands of individual cells within tumors driven by transposon mutagenesis. This approach revealed a surprising genetic diversity among xenograft tumors and identified recurrent co-occurring mutations that emerge within distinct tumor subclones. Taken together, these observations reveal an unappreciated genetic complexity that drives BRAF inhibitor resistance.
Pushing the boundaries: an interview with Dae-Hyun Kim on terahertz devices
Authors: Wang Defu 
Published: January 2024

Abstract
III–V compound semiconductors, such as InGaAs/InAlAs, exhibit exceptional carrier transport properties, establishing them as fundamental elements in terahertz (THz) applications crucial for the development of 6G networks. These materials present the potential for high-performance, energy-efficient THz devices. Furthermore, their compatibility with heterojunction integration, particularly in hetero-integration with silicon-germanium (SiGe) bipolar complementary metal–oxide–semiconductor (BiCMOS), paves the way for cutting-edge THz devices. This advantage highlights the crucial role of III–V semiconductors in driving THz and 6G technology, meeting the evolving demands of future wireless communication and sensing systems.
NSR conducted an interview with Dr. Dae-Hyun Kim, a semiconductor expert with a distinguished academic and professional background. Dr. Kim embarked on his career at Teledyne Scientific Company in 2008, later joining SEMATECH in 2012, where he played a crucial role in propelling semiconductor technology forward. In 2015, he assumed the position of an Associate Professor at Kyungpook National University. Dr. Kim's journey embodies his long commitment to the field, underscored by his remarkable contributions. In this interview, Dr. Kim shared his insights on fostering collaboration within the semiconductor field. He particularly emphasized on effective approaches for advancing research and innovation in semiconductor technology.
Burden of Medically Attended Diarrhea and OutpatientClostridioides difficileInfection Among Persons in 2 Large Integrated Healthcare Settings, 2016–2021
Authors: Tartof Sara Y , Schmidt Mark A , Contreras Richard , Angulo Frederick J , Florea Ana , Barreras Joanna L , Donald Judy , Zamparo Joann , Grant Deborah Ling , Shuster Elizabeth , Gonzalez Elisa , Kuntz Jennifer L 
Published: January 2024

AbstractBackgroundIdentification of Clostridioides difficile infection (CDI) in the community setting is increasing. We describe testing for CDI among patients with medically attended diarrhea (MAD) in the outpatient setting, and the incidence of outpatient CDI.MethodsThis was a retrospective cohort study among members ≥18 years of age from Kaiser Permanente Southern California and Kaiser Permanente Northwest from 1 January 2016 through 31 December 2021. MAD was identified by outpatient diarrheal International Classification of Diseases, Tenth Revision diagnosis codes, and CDI through positive laboratory results. Outpatient CDI was defined by no hospitalization ≤7 days after specimen collection. Incidence rates (IRs) of outpatient CDI were stratified by select demographic and clinical variables. Outpatient CDI burden 12 months following index date was measured by CDI-associated healthcare visits, and CDI testing and treatment.ResultsWe identified 777 533 MAD episodes; 12.1% (93 964/777 533) were tested for CDI. Of those tested, 10.8% (10 110/93 964) were positive. Outpatient CDI IR was 51.0 (95% confidence interval [CI], 49.8–52.2) per 100 000 person-years, decreasing from 58.2 (95% CI, 55.7–60.7) in 2016 to 45.7 (95% CI, 43.7–47.8) in 2021. Approximately 44% (n = 4200) received an antibiotic 30 days prior to index date and 84.1% (n = 8006) CDIs were “community-associated” (no hospitalizations 12 weeks prior to index date). Of outpatient CDIs, 6.7% (n = 526) had a CDI-associated hospitalization ≤12 months.ConclusionsThere was a high incidence of outpatient CDI despite infrequent CDI testing among patients with MAD. The majority of those with outpatient CDI had no recent antibiotic use and no recent hospitalization. Further studies are needed to understand the source and management of medically attended outpatient CDI.
Veiling and Head-Covering in Late Antiquity: Between Ideology, Aesthetics and Practicality
Authors: Stafford Grace 
Published: January 2024

Abstract
In Late Antiquity, as today, women’s veiling was a contentious topic. Early Christian churchmen wrote about it at length, exhorting women to cover and criticizing those they considered were not veiling appropriately. According to these writers, veils were an essential garment tied to Christian modesty and religious ideas about female submission to male authority. Modern scholarship has tended to side with these clergymen, often claiming that with the rise of Christianity came the social expectation that adult women cover their heads. However, veiling had been a part of life in the Mediterranean for centuries, and the frustration and frequency with which churchmen urged women to veil suggests that contemporary practices often diverged significantly from their expectations. This article examines veiling and head-covering as a complex social practice shaped by numerous intersectional and situational factors beyond religion, including status, practicality, fashion and social context. It explores a wide range of visual and material culture to illuminate the diversity of veiling beyond the diatribes of churchmen. Throughout, how we understand veiling in the past is brought into dialogue with scholarship on modern Islamic veiling to address biases towards veiled women and to find new ways of centring women’s experiences and everyday practices.
A Streptomyces species from the ginseng rhizosphere exhibits biocontrol potential
Authors: Huang Jiaquan , Li Xiaojie , Zhan Xuanlin , Pan Shiyu , Pan Chao , Li Jixiao , Fan Siting , Zhang Liner , Du Kehan , Du Zhiying , Zhang Jiayu , Huang Han , Li Jie , Zhang Heqian , Qin Zhiwei 
Published: January 2024

Abstract
Plants and their associated microbes live in complicated, changeable, and unpredictable environments. They usually interact with each other in many ways through multidimensional, multiscale, and multilevel coupling manners, leading to challenges in the coexistence of randomness and determinism or continuity and discreteness. Gaining a deeper understanding of these diverse interaction mechanisms can facilitate the development of data-mining theories and methods for complex systems, coupled modeling for systems with different spatiotemporal scales and functional properties, or even a universal theory of information and information interactions. In this study, we use a “closed-loop” model to present a plant–microbe interaction system and describe the probable functions of microbial natural products. Specifically, we report a rhizosphere species, Streptomyces ginsengnesis G7, which produces polyketide lydicamycins and other active metabolites. Interestingly, these distinct molecules have the potential to function both as antibiotics and as herbicides for crop protection. Detailed laboratory experiments conducted in Arabidopsis (Arabidopsis thaliana), combined with a comprehensive bioinformatics analysis, allow us to rationalize a model for this specific plant–microbe interaction process. Our work reveals the benefits of exploring otherwise neglected resources for the identification of potential functional molecules and provides a reference to better understand the system biology of complex ecosystems.
Mitochondrial atp1 mRNA knockdown by a custom-designed pentatricopeptide repeat protein alters ATP synthase
Authors: Yang Fei , Vincis Pereira Sanglard Lilian , Lee Chun-Pong , Ströher Elke , Singh Swati , Oh Glenda Guec Khim , Millar A Harvey , Small Ian , Colas des Francs-Small Catherine 
Published: January 2024

Abstract
Spontaneous mutations are rare in mitochondria and the lack of mitochondrial transformation methods has hindered genetic analyses. We show that a custom-designed RNA-binding pentatricopeptide repeat (PPR) protein binds and specifically induces cleavage of ATP synthase subunit1 (atp1) mRNA in mitochondria, significantly decreasing the abundance of the Atp1 protein and the assembled F1Fo ATP synthase in Arabidopsis (Arabidopsis thaliana). The transformed plants are characterized by delayed vegetative growth and reduced fertility. Five-fold depletion of Atp1 level was accompanied by a decrease in abundance of other ATP synthase subunits and lowered ATP synthesis rate of isolated mitochondria, but no change to mitochondrial electron transport chain complexes, adenylates, or energy charge in planta. Transcripts for amino acid transport and a variety of stress response processes were differentially expressed in lines containing the PPR protein, indicating changes to achieve cellular homeostasis when ATP synthase was highly depleted. Leaves of ATP synthase-depleted lines showed higher respiratory rates and elevated steady-state levels of numerous amino acids, most notably of the serine family. The results show the value of using custom-designed PPR proteins to influence the expression of specific mitochondrial transcripts to carry out reverse genetic studies on mitochondrial gene functions and the consequences of ATP synthase depletion on cellular functions in Arabidopsis.
Abscisic acid–induced transcription factor PsMYB306 negatively regulates tree peony bud dormancy release
Authors: Yuan Yanping , Zeng Lingling , Kong Derong , Mao Yanxiang , Xu Yingru , Wang Meiling , Zhao Yike , Jiang Cai-Zhong , Zhang Yanlong , Sun Daoyang 
Published: January 2024

Abstract
Bud dormancy is a crucial strategy for perennial plants to withstand adverse winter conditions. However, the regulatory mechanism of bud dormancy in tree peony (Paeonia suffruticosa) remains largely unknown. Here, we observed dramatically reduced and increased accumulation of abscisic acid (ABA) and bioactive gibberellins (GAs) GA1 and GA3, respectively, during bud endodormancy release of tree peony under prolonged chilling treatment. An Illumina RNA sequencing study was performed to identify potential genes involved in the bud endodormancy regulation in tree peony. Correlation matrix, principal component, and interaction network analyses identified a downregulated MYB transcription factor gene, PsMYB306, the expression of which positively correlated with 9-CIS-EPOXYCAROTENOID DIOXYGENASE 3 (PsNCED3) expression. Protein modeling analysis revealed 4 residues within the R2R3 domain of PsMYB306 to possess DNA binding capability. Transcription of PsMYB306 was increased by ABA treatment. Overexpression of PsMYB306 in petunia (Petunia hybrida) inhibited seed germination and plant growth, concomitant with elevated ABA and decreased GA contents. Silencing of PsMYB306 accelerated cold-triggered tree peony bud burst and influenced the production of ABA and GAs and the expression of their biosynthetic genes. ABA application reduced bud dormancy release and transcription of ENT-KAURENOIC ACID OXIDASE 1 (PsKAO1), GA20-OXIDASE 1 (PsGA20ox1), and GA3-OXIDASE 1 (PsGA3ox1) associated with GA biosynthesis in PsMYB306-silenced buds. In vivo and in vitro binding assays confirmed that PsMYB306 specifically transactivated the promoter of PsNCED3. Silencing of PsNCED3 also promoted bud break and growth. Altogether, our findings suggest that PsMYB306 negatively modulates cold-induced bud endodormancy release by regulating ABA production.
Reframing the police staffing challenge: A systems approach to workforce planning and managing workload demand
Authors: Wilson Jeremy M , Grammich Clifford A 
Published: January 2024

Abstract
Policing agencies in the United States and elsewhere continue to face staff shortages. Calls for greater diversity and different skills among police officers further complicate staffing efforts. Attempts to address these issues typically focus on recruitment and retention. This oversimplifies the problems and leads to piecemeal solutions. We draw on multiple threads of staffing research and field experience to highlight lessons for building effective police workforces. We illustrate the interconnected nature of staffing allocation, workload demand, performance objectives, staff supply and demand, workforce attributes, cohort management, demographic and generational shifts, and systemic circumstances. We suggest that agencies consider staffing from a systems perspective. We illustrate the elements of a police staffing system, discuss the broader ecosystem police staffing must consider, and present a six-step approach for managing police staffing and workload demand. Our lessons should be of interest to all who must address police staffing challenges and community expectations.
Blameworthiness is Terminable
Authors: Matheson Benjamin 
Published: January 2024

Abstract
A theory of blameworthiness must answer two fundamental questions. First, what makes a person blameworthy when they act? Secondly, what makes a person blameworthy after the time of action? Two main answers have been given to the second question. According to interminability theorists, blameworthiness necessarily doesn't even diminish over time. Terminability theorists deny this. In this paper, I argue against interminability and in favour of terminability. After clarifying the debate about whether blameworthiness is interminable or terminable, I argue there's no positive case for interminability. I then respond to three objections to terminability. In doing so, I clarify the nature of blame, self-blame, and posthumous blame. I also give theoretical reasons in favour of the view that a person's blameworthiness for a minor wrong can not only diminish but also cease completely.
Worker Beliefs About Outside Options
Authors: Jäger Simon , Roth Christopher , Roussille Nina , Schoefer Benjamin 
Published: January 2024

Abstract
Standard labor market models assume that workers hold accurate beliefs about the external wage distribution, and hence their outside options with other employers. We test this assumption by comparing German workers’ beliefs about outside options with objective benchmarks. First, we find that workers wrongly anchor their beliefs about outside options on their current wage: workers that would experience a 10% wage change if switching to their outside option only expect a 1% change. Second, workers in low-paying firms underestimate wages elsewhere. Third, in response to information about the wages of similar workers, respondents correct their beliefs about their outside options and change their job search and wage negotiation intentions. Finally, we analyze the consequences of anchoring in a simple equilibrium model. In the model, anchored beliefs keep overly pessimistic workers stuck in low-wage jobs, which gives rise to monopsony power and labor market segmentation.