bluuebunny/crossref_metadata_2025_split huggingface dataset:
Path-lengths in the quiet Sun transition region using O iv lines from IRIS
Authors: Rao Yamini K , Del Zanna Giulio , Mason Helen E , Dufresne Roger 
Published: September 2022

ABSTRACT
We use spectroscopic diagnostics to determine different plasma parameters in the transition region of the quiet Sun. The electron number density from O iv lines using high-resolution spectral observations from the Interface Region Imaging Spectrograph (IRIS) are estimated to be around 1010 cm−3, in agreement with literature values and our re-analysis of earlier observations from HRTS and SUMER. We also find a large scatter in the densities obtained from IRIS and SUMER. We use these densities to estimate the size of the emitting region (the path-length) using an isothermal assumption. We find evidence for some centre-to-limb variations, with median values of path-lengths for disc centre and near the limb from IRIS O iv being 10 and 31 km, respectively. These values are close to those obtained from HRTS. We also use new atomic models for the quiet Sun, which include electron density effects, photoionization, and charge transfer, to find path-lengths from Si iv and C iv in close agreement with those from O iv. Finally, we estimate the emission measure from HRTS data to show that the isothermal assumption overestimates the path-lengths by factors of 5–8. Such small path-lengths should be taken into account when modelling the transition region for the interpretation of observations from e.g. IRIS and the Solar Orbiter SPICE spectrometer.
Spatially dependent photometric activity of M dwarfs in the solar cylinder
Authors: Chang Seo-Won , Wolf Christian , Onken Christopher A 
Published: September 2022

ABSTRACT
We study the relationship between Galactic location (R, Z) and photometric activity for 3.6 million M dwarf stars within 1 kpc of the Sun. For this purpose, we identify 906 unique flare events as a proxy for magnetic activity from the SkyMapper Southern Survey Data Release 3. We adopt vertical distance |Z| from the Galactic disc as a proxy for age and confirm a strong trend of flaring fraction decreasing with growing stellar age. Among M dwarfs within 50 pc of the Sun, we find a flaring fraction of one in 1500, independent of spectral type from M2 to M7, suggesting that these stars are all in a flare-saturated young evolutionary stage. We find a hint of a kink in the slope of the overall flare fraction near 100 pc from the plane, where a steep decline begins; this slope change is visible for mid-type M dwarfs (M3–M5), suggesting it is not an artefact of mixing spectral type. Together with the Sloan Digital Sky Survey Hα emission, this trend is additional evidence that the activity fraction of M dwarfs depends on Galactic height and activity lifetime. While there is a hint of flattening of the overall activity fraction above |Z| ≈ 500 pc, our data do not constrain this further. Within ∼500 pc distance from the Sun, we find no sign of radial disc gradients in flare activity, which may only be revealed by samples covering a larger radial range.
Evaporation before disruption: Comparing time-scales for Jovian planets in star-forming regions
Authors: Daffern-Powell Emma C , Parker Richard J 
Published: September 2022

ABSTRACT
Simulations show that the orbits of planets are readily disrupted in dense star-forming regions; planets can also be exchanged between stars, or become free-floating and then be captured by other stars. However, dense star-forming regions also tend to be populous, containing massive stars that emit photoionizing radiation, which can evaporate the gas in protoplanetary discs. We analyse N-body simulations of star-forming regions containing Jovian-mass planets and determine the times when their orbits are altered, when they become free-floating, and when they are stolen or captured. Simultaneously, we perform calculations of the evolution of protoplanetary discs when exposed to FUV radiation fields from massive stars in the same star-forming regions. In almost half (44 per cent) of the planetary systems that are disrupted – either altered, captured, stolen or become free-floating, we find that the radius of the protoplanetary disc evolves inwards, or the gas in the disc is completely evaporated, before the planets’ orbits are disrupted. This implies that planets that are disrupted in dense, populous star-forming regions are more likely to be super-Earths or mini-Neptunes, as Jovian mass planets would not be able to form due to mass-loss from photoevaporation. Furthermore, the recent discoveries of distant Jovian mass planets around tightly packed terrestrial planets argue against their formation in populous star-forming regions, as photoevaporation would preclude gas giant planet formation at distances of more than a few au.
A study on the clustering properties of radio-selected sources in the Lockman Hole region at 325 MHz
Authors: Mazumder Aishrila , Chakraborty Arnab , Datta Abhirup 
Published: September 2022

ABSTRACT
Studying the spatial distribution of extragalactic source populations is vital in understanding the matter distribution in the Universe. It also enables understanding the cosmological evolution of dark matter density fields and the relationship between dark matter and luminous matter. Clustering studies are also required for EoR foreground studies since it affects the relevant angular scales. This paper investigates the angular and spatial clustering properties and the bias parameter of radio-selected sources in the Lockman Hole field at 325 MHz. The data probes sources with fluxes ≳0.3 mJy within a radius of 1.8° around the phase centre of a 6° × 6° mosaic. Based on their radio luminosity, the sources are classified into Active Galactic Nuclei (AGNs) and Star-Forming Galaxies (SFGs). Clustering and bias parameters are determined for the combined populations and the classified sources. The spatial correlation length and the bias of AGNs are greater than SFGs- indicating that more massive haloes host the former. This study is the first reported estimate of the clustering property of sources at 325 MHz, intermediate between the pre-existing studies at high and low-frequency bands. It also probes a well-studied deep field at an unexplored frequency with moderate depth and area. Clustering studies require such observations along different lines of sight, with various fields and data sets across frequencies to avoid cosmic variance and systematics. Thus, an extragalactic deep field has been studied in this work to contribute to this knowledge.
The white dwarf binary pathways survey – VIII. A post-common envelope binary with a massive white dwarf and an active G-type secondary star
Authors: Hernandez M S , Schreiber M R , Parsons S G , Gänsicke B T , Toloza O , Zorotovic M , Raddi R , Rebassa-Mansergas A , Ren J J 
Published: September 2022

ABSTRACT
The white dwarf binary pathways survey is dedicated to studying the origin and evolution of binaries containing a white dwarf and an intermediate-mass secondary star of the spectral type A, F, G, or K (WD + AFGK). Here, we present CPD-65 264, a new post-common envelope binary with an orbital period of 1.37 d that contains a massive white dwarf ($0.86\pm 0.06\, \mathrm{M}_{\odot }$) and an intermediate-mass ($1.00\pm 0.05\, \mathrm{M}_{\odot }$) main-sequence secondary star. We characterized the secondary star and measured the orbital period using high-resolution optical spectroscopy. The white dwarf parameters are determined from HST spectroscopy. In addition, TESS observations revealed that up to 19 per cent of the surface of the secondary is covered with starspots. Small period changes found in the light curve indicate that the secondary is the second example of a G-type secondary star in a post-common envelope binary with latitudinal differential rotation. Given the relatively large mass of the white dwarf and the short orbital period, future mass transfer will be dynamically and thermally stable and the system will evolve into a cataclysmic variable. The formation of the system can be understood assuming common envelope evolution without contributions from energy sources besides orbital energy. CPD-65 264 is the seventh post-common envelope binaries with intermediate-mass secondaries that can be understood assuming a small efficiency in the common envelope energy equation, in agreement with findings for post-common envelope binaries with M-dwarf or substellar companions.
Radiative cooling for passive thermal management towards sustainable carbon neutrality
Authors: Liang Jun , Wu Jiawei , Guo Jun , Li Huagen , Zhou Xianjun , Liang Sheng , Qiu Cheng-Wei , Tao Guangming 
Published: September 2022

ABSTRACT
Photonic structures at the wavelength scale offer innovative energy solutions for a wide range of applications, from high-efficiency photovoltaics to passive cooling, thus reshaping the global energy landscape. Radiative cooling based on structural and material design presents new opportunities for sustainable carbon neutrality as a zero-energy, ecologically friendly cooling strategy. In this review, in addition to introducing the fundamentals of the basic theory of radiative cooling technology, typical radiative cooling materials alongside their cooling effects over recent years are summarized and the current research status of radiative cooling materials is outlined and discussed. Furthermore, technical challenges and potential advancements for radiative cooling are forecast with an outline of future application scenarios and development trends. In the future, radiative cooling is expected to make a significant contribution to global energy saving and emission reduction.
Cryoglobulins and cold agglutinins for hand arm vibration syndrome
Authors: Alsaidi Y , Thompson A , Spilchuk V , House R A , Adisesh A 
Published: September 2022

AbstractBackgroundHand arm vibration syndrome (HAVS) is a condition caused by hand transmitted vibration from the use of hand-held vibrating tools or workpieces. The disease affects the vascular, neurological and musculoskeletal systems. The vascular component of HAVS is a form of secondary Raynaud’s phenomenon. Other causes of disease must be excluded before attributing the cause to hand transmitted vibration.AimsTo evaluate the prevalence, and utility of testing for, cryoglobulins and cold agglutinins in patients with HAVS symptoms.MethodsA retrospective cohort study of 1183 patients referred for HAVS clinical assessment at St. Michael’s Hospital, Toronto, Canada, between 2014 and 2020. The standard operating procedure at the clinic includes a detailed clinical and exposure history, physical examination, objective investigations and blood tests. Data were retrieved from patient chart review and laboratory investigation results for all cases with cryoglobulin and cold agglutinin testing.ResultsA total of 1183 patients had a serum cryoglobulin measurement. Eleven patients (1%) were positive. Seven positive results were ‘low titre’ (1% positive) and the other four results were 2%, 6%, 9% and 18%. The patient with a 9% positive cryoglobulin titre had previously diagnosed Sjögren’s syndrome. There were no positive cold agglutinin tests in the 795 patients tested.ConclusionsRoutine testing for cryoglobulins and cold agglutinins in patients with HAVS symptoms is not recommended because test positivity rates are negligible. Testing may be considered if the clinical history or routine blood investigations suggest evidence of underlying cryoglobulinaemia or cold agglutinin disease.
Low Risk of Failing Direct-Acting Antivirals in People With Human Immunodeficiency Virus/Hepatitis C Virus From Sub-Saharan Africa or Southeastern Asia: A European Cross-Sectional Study
Authors: Isfordink Cas , Boyd Anders , Mocroft Amanda , Kusejko Katharina , Smit Colette , de Wit Stephane , Mahungu Tabitha , Falconer Karolin , Wandeler Gilles , Cavassini Matthias , Stöckle Marcel , Schinkel Janke , Rauch Andri , Peters Lars , van der Valk Marc ,   for EuroSIDA, the Swiss HIV Cohort Study, and the ATHENA Observational Cohort
Published: September 2022

Abstract

Background
Several studies have reported suboptimal efficacy of direct-acting antivirals (DAAs) to treat hepatitis C virus (HCV) subtypes endemic to sub-Saharan Africa (SSA) and Southeastern Asia (SEA). The extent of this issue in individuals with human immunodeficiency virus (HIV)/HCV from SSA or SEA residing in Europe is unknown.

Methods
We retrospectively analyzed data from several prospective European cohorts of people living with HIV. We included individuals with HIV/HCV who originated from SSA or SEA, were treated with interferon-free DAAs, and had an available HCV RNA result ≥12 weeks after the end of treatment. The primary outcome was sustained virological response at least 12 weeks after the end of treatment (SVR12).

Results
Of the 3293 individuals with HIV/HCV treated with DAA and with available SVR12 data, 142 were from SSA (n = 64) and SEA (n = 78). SVR12 was achieved by 60 (94% [95% confidence interval {CI}, 86%–98%]) individuals from SSA and 76 (97% [95% CI, 92%–99%]) from SEA. The genotypes of the 6 individuals failing DAA treatment were 2, 3a, 3h, 4a, 4c, and 6j. For 2 of the 4 unsuccessfully treated individuals with available sequence data at treatment failure, NS5A resistance-associated substitutions were present (30R/93S in an individual with genotype 4c and 31M in an individual with genotype 6j).

Conclusions
SVR12 rates were high in individuals with HIV/HCV residing in Europe and originating from regions where intrinsically NS5A-resistant HCV strains are endemic. HCV elimination for this population in Europe is unlikely to be hampered by suboptimal DAA efficacy.
Early nest initiation and vegetation density enhance nest survival in Wild Turkeys
Authors: Keever Allison C , Collier Bret A , Chamberlain Michael J , Cohen Bradley S 
Published: September 2022

Abstract
The theory of adaptive habitat selection suggests resource selection by animals should reflect underlying quality, such that individual selection confers an adaptive advantage via increased fitness. Using resource selection functions and nest survival models, we demonstrated that visual obstruction at the nest site was adaptively significant but timing of nest initiation had the greatest effect on nest survival for eastern Wild Turkeys (Meleagris gallopavo silvestris). Predation risk is a selective pressure, and if individuals can perceive predation risk, they may respond by altering the selection of nest site characteristics based on prior experience. We evaluated patterns in nest site selection of 387 Wild Turkeys and the consequences of selection on reproductive success across the southeastern United States from 2014 to 2019. We monitored 549 nest sites and found that nest initiation date had the strongest effect on daily nest survival rates, wherein adult females at our earliest nest initiation date were ~4 times more likely to successfully nest than females at our latest nest initiation date. Selection of nest sites with greater visual obstruction also increased daily nest survival rates, and females were 1.17 (95% CI: 1.100–1.234) and 1.37 (95% CI: 1.258–1.486) times more likely to select sites for every 10-cm increase in visual obstruction and maximum vegetation height, respectively. Collectively, our results indicate that nest initiation date is likely the critical parameter driving Wild Turkey nest success, whereas vegetative conditions play a lesser role in influencing nest success. Females nesting earlier may be in better body condition and show increased nest attentiveness, which may mediate nest success more than vegetation conditions around nest sites. Our work indicates that increasing the reproductive success of Wild Turkeys may hinge on females being able to nest as early as possible within the reproductive season.
Can Post-Subduction Porphyry Cu Magmas Form by Partial Melting of Typical Lower Crustal Amphibole-Rich Cumulates? Petrographic and Experimental Constraints from Samples of the Kohistan and Gangdese Arc Roots
Authors: Zhang Jingbo , Chang Jia , Wang Rui , Audétat Andreas 
Published: September 2022

Abstract
Sulfide-rich hydrous arc cumulates in the lower crust are considered a likely source for porphyry Cu-forming magmas in post-subduction settings. However, it remains controversial whether or not post-subduction porphyry Cu magmas can be produced by partial melting of lower crustal arc cumulates. Here we performed detailed petrographic and geochemical studies on exhumed lower to middle crustal cumulates from the Gangdese and Kohistan arc sections, and then conducted partial melting experiments of the Gangdese sulfide-rich lithologies at 1.5 GPa and 800°C–1150°C using a piston cylinder press. Both the Gangdese and the Kohistan arc-root samples formed as cumulates in the lower to middle crust, but the Kohistan samples were subsequently brought into the garnet stability field during the India–Eurasia continental collision. Most of the Gangdese samples contain relatively high abundances of magmatic sulfides preserved in the form of Cu-poor monosulfide solid solution. In contrast, most of the Kohistan samples contain very low abundances of Cu-rich sulfides preserved as inclusions in garnet, probably due to intense metamorphic dehydration and up to 2 wt% partial melting in the garnet stability field. The original magmatic sulfides at Kohistan appear to have been removed mainly by metamorphic fluids rather than by partial melts, as the arc-root samples could have experienced only very low degree of partial melting and the sulfur solubility in experimentally produced partial melts is low (≤0.1 wt%) even at oxygen fugacities two log-units above the fayalite-magnetite-quartz buffer. Furthermore, the experimental partial melts contain much less K2O, MgO, Cl and ±S than typical post-subduction porphyry Cu-forming magmas. Hence, we conclude that the role of sulfide-rich arc cumulates in the formation of post-subduction porphyry Cu magmas has been severely overestimated.
Large Vascular Bundle Phloem Area 4 enhances grain yield and quality in rice via source–sink–flow
Authors: Zhai Laiyuan , Yan An , Shao Kuitian , Wang Shu , Wang Yun , Chen Zhong-Hua , Xu Jianlong 
Published: September 2022

Abstract
In rice (Oryza sativa L.), vascular bundle phloem tissue in the panicle neck is vital for the transport of photosynthetic products from leaf to panicle and is positively associated with grain yield. However, genetic regulation of the single large vascular bundle phloem area (LVPA) in rice panicle neck tissue remains poorly understood. In this study, we carried out genome-wide association analysis of LVPA in the panicle neck using 386 rice accessions and isolated and characterized the gene LVPA4, which is allelic to NARROW LEAF1 (NAL1). Phenotypic analyses were carried out on the near-isogenic line (NIL) NIL-LVPA4LT in the high-yielding indica (xian) cultivar Teqing and on overexpression lines transformed with a vector carrying the Lemont alleles of LVPA4. Both NIL-LVPA4LT and LVPA4 overexpression lines exhibited significantly increased LVPA, enlarged flag leaf size, and improved panicle type. NIL-LVPA4LT had a 7.6%–9.6% yield increase, mainly due to the significantly higher filled grain number per panicle, larger vascular system for transporting photoassimilates to spikelets, and more sufficient source supply that could service the increased sink capacity. Moreover, NIL-LVPA4LT had improved grain quality compared with Teqing, which was mainly attributed to substantial improvement in grain filling, especially for inferior spikelets in NIL-LVPA4LT. The single-nucleotide variation in the third exon of LVPA4 was associated with LVPA, spikelet number, and leaf size throughout sequencing analysis in 386 panels. The results demonstrate that LVPA4 has synergistic effects on source capacity, sink size, and flow transport and plays crucial roles in rice productivity and grain quality, thus revealing the value of LVPA4 in rice breeding programs for improved varieties.
Globalization of scientific communication: Evidence from authors in academic journals by country of origin
Authors: Macháček Vít 
Published: September 2022

Abstract
This study measures the tendency to publish in international scientific journals. For each of nearly 35,000 Scopus-indexed journals, we derive seven globalization indicators based on the composition of authors by country of origin and other characteristics. These are subsequently scaled up to the level of 174 countries and 27 disciplines between 2005 and 2017. The results indicate that advanced countries maintain high globalization of scientific communication that is not varying across disciplines. Social sciences and health sciences are less globalized than physical and life sciences. Countries of the former Soviet bloc score far lower on the globalization measures, especially in social sciences or health sciences. Russia remains among the least globalized during the whole period, with no upward trend. Contrary, China has profoundly globalized its science system, gradually moving from the lowest globalization figures to the world average. The article concludes with reflections on measurement issues and policy implications.
THE SYSTEM OF RADIATION PROTECTION QUANTITIES USED FOR OCCUPATIONAL EXPOSURES TO EXTERNAL SOURCES: SHORT HISTORY AND CRITICAL REVIEW
Authors: Bouzegzi K , Frahi-Amroun A 
Published: September 2022

Abstract
The article summarises the development of the system of radiation protection quantities used for occupational exposures to external sources throughout the last century. Although the current system generally meets the radiation protection needs quite satisfactorily, this system has often been the target of criticism. Some controversial issues are highlighted in the present paper. The conclusion is that it would be appropriate to undertake a deep review of the current system and suggest the necessary revisions to remove any ambiguities or confusion and address the deficiencies and incoherencies.
A REVIEW OF 137CS TRANSFER FACTOR STUDIES FOR INDIAN ENVIRONS
Authors: Prabhu Ujwal , Shanker Jada 
Published: September 2022

Abstract
In recent years there have been conscious efforts put by researchers in India to generate the soil-to-plant 137Cs transfer factor values. This review study is aimed at providing a comprehensive background of 137Cs transfer rates around the environs of a few nuclear power plant sites of India. As a part of this, the study looked into 137Cs transfer rates from soil to various plant species. The effort was made to quantify the transfer rates of 137Cs and various parameters affecting the movement of 137Cs in the terrestrial environment. The past and current knowledge on 137Cs transfer factors available in the literature were reviewed thoroughly and highlighted the need for incorporating lesser known and overlooked aspects of radionuclide behaviour for future studies. The paper also tried to identify and highlight the gaps and inconsistencies in the reported values of 137Cs transfer factors.