bluuebunny/crossref_metadata_2025_split huggingface dataset:
Hot subdwarf wind models with accurate abundances
Authors: Krtička J. , Krtičková I. , Janík J. , Németh P. , Kubát J. , Vučković M. 
Published: January 2024

Context. Helium-dominated subdwarfs are core helium burning stars stripped of their envelope. The nuclear evolution of these stars alters surface abundances. Modified abundances impact the strength of the stellar wind.
Aims. We aim to understand the influence of modified surface abundances on the strength of the stellar wind in the helium-dominated subdwarfs CD–46 8926 and CD–51 11879. A modified wind strength could resolve the problem with the X-ray emission of these stars, as the expected X-ray luminosity of both stars is significantly higher than the upper limit determined from observations.
Methods. We used our own optical spectroscopy combined with archival ultraviolet spectroscopy and photometry to derive basic parameters and surface abundances of selected subdwarfs. The resulting parameterst served as input for the METUJE stellar wind code, which predicts the wind structure of these stars. We compared the derived wind parameters with the predictions derived for solar abundances.
Results. The optical analysis showed that both subdwarfs have effective temperatures in excess of 60 kK and a strong overabundance of carbon in the case of CD–46 8926 and nitrogen in the case of CD–51 11879. We interpret the abundance patterns as being a result of enrichment by the products of nuclear reactions. The modified abundances reduce the wind mass-loss rate by tens of percent. The reduction improves the predicted wind line profiles in comparison to observations. The change in helium abundance does not have a strong effect on the wind parameters. As a result of a lower estimated bolometric luminosity and mass-loss rate and a larger distance, the expected X-ray luminosities become lower and agree with observational upper limits.
Conclusions. The nucleosynthesis does not significantly alter the strength of the wind of hot subdwarfs, but the inclusion of proper stellar parameters improves the agreement with observational wind characteristics. Our analysis indicates that subdwarfs overabundant in helium are typically able to launch wind. This conclusion is supported by data gathered for thousands of subdwarfs from the literature, which shows that subdwarfs overabundant in helium avoid the region in the Kiel diagram where the winds are predicted to be absent. This can be interpreted in terms of the gravitational settling of helium, which is suppressed by the winds.
High-resolution radio imaging of the two particle-accelerating colliding-wind binaries HD 167971 and HD 168112
Authors: De Becker M. , Marcote B. , Furst T. , Benaglia P. 
Published: January 2024

Context. The colliding-wind region in binary systems made up of massive stars allows us to investigate various aspects of shock physics, including particle acceleration. Particle accelerators of this kind are mainly identified thanks to their synchrotron radio emission and dubbed particle-accelerating colliding-wind binaries.
Aims. Our objective is first to validate the notion that obtaining snapshot high-resolution radio images of massive binaries constitutes a relevant approach to unambiguously identifying particle accelerators. Second, we intend to exploit these images to characterise the synchrotron emission of two specific targets, HD 167971 and HD 168112, which are known particle accelerators.
Methods. We traced the radio emission from the two targets at 1.6 GHz with the European Very Long Baseline Interferometry (VLBI) Network, with an angular resolution of a few milli-arcseconds.
Results. Our measurements allowed us to obtain images for both targets. For HD 167971, our observation occurs close to apastron, at an orbital phase where the synchrotron emission is at minimum. For HD 168112, we resolved for the very first time the synchrotron emission region. The emission region appears slightly elongated, in agreement with the expectations for a colliding-wind region. In both cases, the measured emission is significantly stronger than the expected thermal emission from the stellar winds, lending strong support to their non-thermal nature.
Conclusions. Our study offers a significant contribution to the still poorly addressed question of high angular resolution radio imaging of colliding-wind binaries. We show that snapshot VLBI measurements constitute an efficient approach to investigate these objects, with promising results in terms of the identification of additional particle accelerators, coupled with their applicability in revealing long-period binaries.
Clinical usefulness of tissue acquisition of pancreatic cystic lesions using an endoscopic ultrasound-guided needle for histological analysis
Authors: Castro Juliana Silveira Lima de , Taglieri Eloy , Neto Otávio Micelli , Guerra João Guilherme , Venco Filadélfio Euclides , Andrade Eliza , Seraphim Alvaro Moura , Romanini Samuel Galante , Torres Isabela Trindade , Serrano Juan Pablo Roman , Goldman Suzan Menasce , Kemp Rafael , dos Santos José Sebastião , Ardengh José Celso 
Published: January 2024

Abstract
Background and study aims There are rare data on the usefulness
of endosonography-guided tissue acquisition (EUS-TA) in patients with pancreatic cystic
lesions (PCLs). This study aimed to determine the accuracy of EUS-TA with ProCore 20G (PC20)
for differentiating between mucinous neoplasia (MN) and non-MNs (n-MN) and identifying
malignant PCLs, as well as its adverse events (AEs) in patients with PCLs without a
classificatory diagnosis by imaging exams.
Patients and methods In this observational, retrospective,
single-center study, all patients with PCL who underwent EUS-TA due to diagnostic doubts in
imaging studies were consecutively recruited from June 2017 to December 2021. The outcomes
were to determine the diagnostic accuracy of EUS-TA with PC20 for differentiating between MN
and n-MN, identifying malignant PCLs, and the AEs.
Results Herein, 145 patients underwent EUS-TA, with 83 women
(57.2%) and a mean age of 62.2 years. The mean size was 2.3 cm, with 81 patients (77.9%)
having a PCL < 3.0 cm. The final diagnosis was made by EUS-TA (n = 81), surgery (n = 58),
and follow-up (n = 6). The sensitivity, specificity, positive and negative predictive values,
and accuracy for differentiating between MNs and n-MNs and identifying malignant PCLs were
92.6%, 98.4%, 98.7%, 91.3%, and 95.2% (kappa=0.9), and 92%, 99.2%, 95.8%, 98.3%, and 97.9%
(kappa = 0.93), respectively. The AE rate was 2.7%, with no deaths in this cohort.
Conclusions EUS-TA with PC20 has high accuracy and technical
success with a low AE rate for PCL diagnosis.
Long-Term Outcome and Complications after Transcondylar Screw Placement for Canine Humeral Intracondylar Fissure
Authors: Low Daniel , Hutchings Victoria , Rutherford Scott 
Published: January 2024

Abstract
Objective The aim of this study was to report postoperative complications and long-term outcomes following transcondylar screw placement for humeral intracondylar fissure (HIF).
Study Design It was a retrospective single-centre case series. Medical records (2018–2022) were reviewed for dogs with HIF treated with transcondylar screw placement. Data collected included signalment, concurrent orthopaedic disease, partial or complete HIF, surgeon, surgical approach, surgical technique and implant type, transcondylar screw angulation, postoperative complications and outcomes. Long-term outcome was assessed with owner questionnaire, orthopaedic examination and follow-up radiography. Statistical analysis was performed to identify risk factors predisposing to a complication or a poor outcome.
Results Forty-seven dogs (57 elbows) met the inclusion criteria; long-term follow-up was available in 41 dogs (50 elbows). Minor and major medical complications were noted in seven and three elbows respectively. The total complication rate was 17.5%. Increasing age was significantly associated with a reduced risk of postoperative complications (p = 0.0051). No other risk factors were identified. A postoperative complication was not associated with a less than full outcome (p = 0.5698).
Conclusion Transcondylar screw placement for HIF is associated with a low complication rate and good outcome.
The measurement and analysis of similarity degree on data from two types of seismic recorders
Authors: Pang Guanghua , Xue Peng , Gao Jiawei , Jia Shuaifeng , Yu Shengbao 
Published: January 2024

Seismic instruments are widely used in projects related to geophysical prospecting. Quality data from seismic recorders help to determine subterranean structures with high precision. This paper first introduces a field experiment carried out by deploying seismic stations equipped with two kinds of seismic recorders: GEI (China) and Reftek 130 (USA). Then, the three-component seismograms from GEI are measured and evaluated by comparing with those from Reftek 130 in different aspects: waveforms in time and frequency domain, quantitative analysis by calculation and statistic of correlation coefficient, and signal to noise ratio of seismic signal. Our results were presented by multiple images as the following: (I) Both the time and frequency waveforms of GEI were almost exactly coincident with those of Reftek 130, with over 98.60 percent of the correlation coefficients in the time domain within 0.95–1.0, and all those in the frequency domain above 0.9977. (II) The accurate time lag estimation of GEI’s signal was gained by the lag and correlation algorithms based on left–right sliding windows. The GEI clock was 7.3545 ns behind the Reftek 130 clock after every 1 s, which could be utilized to correct the internal clock to improve the synchronous accuracy of seismic recorders. (III) Some seismic signals from GEI were obviously stronger than those from Reftek 130. Our results may potentially promote and support the optimization of seismic recorders and their application in geophysics methods.
A survey of stockperson attitudes and youngstock management practices on Australian dairy farms
Authors: Field Laura , Verdon Megan , Jongman Ellen , Hemsworth Lauren 
Published: January 2024

Context The attitudes of stockpeople towards their animals directly affects the human–animal relationship, in turn affecting stockperson behaviour and animal welfare and productivity. Little is known about the attitudes of Australian stockpeople towards dairy youngstock under their care. Aims We aimed to explore Australian stockperson attitudes and management practices associated with calf management and reported replacement heifer outcomes. Methods A convenience sample surveying 91 Australian dairy stockpeople was used to explore common calf-rearing practices, as well as attitudes of stockpeople towards youngstock and current issues in youngstock welfare and management on Australian dairy farms. Key results Management of both replacement and non-replacement calves varied considerably by farm, and reported practices did not correlate with herd management or demographic data. Factor analysis identified nine principal components related to attitudes towards primiparous heifer and calf welfare and management practices. Variables calculated from these components rarely correlated with demographic factors; however, female respondents were more likely to have positive attitudes towards current issues in calf management (P = 0.013). Several correlations were found between the component variables. Participants who believed it was difficult to use higher-welfare practices to manage the herd were less likely to believe their trusted advisors valued these practices (P < 0.001), or believe these practices were important themselves (P < 0.001). These participants were more likely to believe that early lactation heifers were difficult to handle (P < 0.001), and less likely to believe that it was important to separate cows and calves for calf health (P = 0.006). Respondents who believed that heifers were difficult to handle in early lactation were more likely to believe heifers on their farm were underperforming (P < 0.001). Conclusions Factors external to farm demographics appear to shape the attitudes of Australian stockpeople and on-farm dairy youngstock management decisions. Attitudes towards youngstock appear to be linked to on-farm cultures, particularly the perceived difficulty of performing tasks linked to good welfare outcomes, and the perceived value placed on these practices by trusted advisors. Implications The results indicate that further research using a more representative sample is needed to better understand those responsible for Australian dairy youngstock management and the key drivers behind their management choices, to best tailor approaches to encouraging implementation of best practice on-farm.
Bonjour la famille!
Authors: Pérez-Sabater Carmen , Maguelouk-Moffo Ginette 
Published: January 2024

Abstract
Rooted in African postcolonial pragmatics, this research pays particular attention to the strategic use of
code-switching and other linguistic strategies for relationship maintenance in instant messaging communities that constitute
translanguaging spaces. To this end, by means of a quantitative and computer-mediated communication discourse analysis, we examine
the naturally-occurring interactions, on WhatsApp, of a group of 74 former university classmates who studied Spanish Philology in
the mid-2000s at a Cameroonian university. The close observation of the group’s interactional strategies for relationship
maintenance shows that members construct their online famille – their new social space for self-presentation – by
means of (1) sociolinguistic and pragmatic norms drawn from indigenisation; (2) kinship terms as forms of address, in English and
Spanish in texts mainly in French; and (3) the inclusion of religious terms as a politeness strategy. The use of Spanish as the
tie-sign of the group is not as relevant as initially expected.
Bare nouns, indefinite articles and partitivity in an Early New High German cookbook
Authors: Glaser Elvira 
Published: January 2024

Abstract
The starting point of the present article is the usage of mass nouns with indefinite articles, known from modern
Bavarian and neighbouring dialects. Our analysis is dedicated to the use of the indefinite article varying with bare nouns in a
historical perspective, based on a cookbook handwritten in 1556 in the East Swabian variety of Augsburg, containing about 900
instances of mass nouns with and without articles. Like in modern Bavarian, the readings OBJECT and QUALITY can be distinguished.
A comparison with the de-nominals in Old Spanish recipes shows that the indefinite articles appear in equivalent
positions with mass nouns mostly denoting non-specific regular objects as instantiations of the kind. The discussion of
quantifiers and measuring expressions shows a special syntactic and semantic behaviour of ain wenig ‘a little’.
The final discussion leads to the assumption that the indefinite article does not formally express a partitive relation, but, at
most, produces partitive effects.
High yield and wide lateral size growth of α-Mo2C: exploring the boundaries of CVD growth of bare MXene analogues
Authors: Ravuri SyamSai , Wrobel Pawel S , Gorantla Sandeep , Bazioti Calliope , Sunding Martin F , Lis Krzysztof , Jedrzejewski Roman , Sartori Sabrina , Diplas Spyros , Gunnæs Anette E , Bachmatiuk Alicja 
Published: January 2024

Abstract
Synthesis of Mo2C bare MXenes, without surface terminations groups, via chemical vapor deposition (CVD) on metal foils is scientifically a very intriguing crystal growth process, and there are still challenges and limited fundamental understanding to overcome to obtain high yield and wide crystal size lateral growth. Achieving large area coverage via direct growth is scientifically vital to utilize the full potential of their unique properties in different applications. In this study, we sought to expand the boundaries of the current CVD growth approach for Mo2C MXenes and gain insights into the possibilities and limitations of large area growth, with a particular focus on controlling Mo concentration. We report a facile modification of their typical CVD growth protocol and show its influence on the Mo2C synthesis, with growth times spanning up to 3 h. Specifically, prior to initiating the CVD growth process, we introduced a holding step in temperature at 1095 °C. This proved to be beneficial in increasing the Mo concentration on the liquid Cu growth surface. We achieved an average Mo2C crystals coverage of approximately 50% of the growth substrate area, increased tendency of coalescence and merging of individual flakes, and lateral flake sizes up to 170 μm wide. To gain deeper understanding into their CVD growth behavior, we conducted a systematic investigation of the effect of several factors, including (i) a holding step time on Mo diffusion rate through molten Cu, (ii) the Cu foil thickness over the Mo foil, and (iii) the CVD growth time. Phase, chemical and microstructural characterization by x-ray diffraction, x-ray photon spectroscopy, SEM and scanning/transmission electron microscopy revealed that the grown crystals are single phase α-Mo2C. Furthermore, insights gained from this study sheds light on crucial factors and inherent limitations that are essential to consider and may help guide future research progress in CVD growth of bare MXenes.
Nonlinear structure and growth rate of solitary waves for extended Zakharov-Kuznetsov equation in plasma having (r, q) distribution electrons
Authors: El-Awady E I , Abdikian A , Saha A 
Published: January 2024

Abstract
The Reductive Perturbation Technique (RPT) is used to investigate ion acoustic waves (IAWs) in magnetized plasmas made up of electrons obeying the generalized form of (

r
,
q

) distribution. The analysis makes use of the Extended Zakharov-Kuznetsov (EZK) equation and the hydrodynamic theory of plasmas. The study investigates the effects of electron flatness (

r

) at low energy and superthermal (

q

) at high energy on the characteristics of IAWs, and the solutions to the EZK equation are plotted for different values of the plasma characteristics, such as the total ion cyclotron frequency, the ion to electron temperature ratio, and the ion-specific heat. The research goes into great detail to estimate the instability threshold and growth rate of these waves by applying a small-k perturbation technique. Overall, this investigation contributes to the better understanding of ion acoustic structures in space plasmas.
Cu-based novel transition-metals chalcogenides for advanced optoelectronic and thermoelectric devices: first-principles study
Authors: Gul Banat , Salman Khan Muhammad , Rahaman Mostafizur , Periyasami Govindasami , Ahmad Hijaz 
Published: January 2024

Abstract
Copper-containing ternary transition-metals chalcogenide semiconductors are remarkable due to their potential employment in optical and electronic devices. Here, density functional theory calculations are used to study the structural, optoelectronic, and thermoelectric properties of ternary Cu2WZ4 (Z = S, Se) materials. To accurately account for the strongly linked electronic combinations, advanced TB-mBJ approximations were used for these calculations. The formation energies are computed to predict their stability. The predicted band structure features well support the density of states calculations and verify semiconducting behavior in these studied materials. Moreover, for potential employment in optoelectronic devices, we calculated the optical parameters such as the dielectric function’s constituents, absorption coefficients, energy loss functions, reflectivity, and refractive index. The thermoelectric results revealed that the materials are suitable for thermoelectric applications. The development of remarkable and integrated semiconductor devices along with their applications would primarily benefit through these investigations.
Continuous-wave pumped dispersion-compensated ultrashort-pulse doubly resonant oscillator studies
Authors: Sharma Himani , Padhi Rojalin , Devi Kavita 
Published: January 2024

Abstract
We have reported theoretical analysis of broadband phase-coherent spectral generation with stable short pulse output based on optical parametric oscillator (OPOs) pumped by low-cost single-mode continuous-wave (cw) laser considering the incorporation of mode-locking element in the cw dispersion-compensated OPO in doubly-resonant oscillator (DRO) configuration. Exploiting the control of dispersion in the cw mode-locked cavity, the intracavity round-trip phase shift, phase coherence among resonating waves, carrier envelope offset phase of mode-locked output and enhancement of efficiency of system using active mode-locking element driven at high modulation frequency has been studied. The study paves the way of realization of compact, low-cost, efficient ultrashort pulse OPO under cw pumping.
A dielectric barrier discharge based low pressure narrow band far UV-C 222 nm excimer lamp and its efficiency analysis
Authors: Ahlawat Kiran , Jangra Ramavtar , Ish Ambar , Jain Neha , Prakash Ram 
Published: January 2024

Abstract
Far UV-C light at wavelength 222 nm is gaining popularity nowadays due to its properties that it cannot penetrate even the outer dead skin of humans and the tear layer of the eyes. This wavelength has been proven to be much safer for human health. In this paper, a dielectric barrier discharge (DBD) based Far UV-C excimer lamp with a very narrow and intense spectrum peaking at a wavelength of 222 nm has been reported. Optimization of high voltage electrodes has been carried out to minimize the lamp heating without using any external cooling. The discharge produced in this configuration is diffused discharge at a low pressure of 140 mbar. Generally, at low pressure, a very wide band of spectra having full-width half maxima (FWHM) of 8–15 nm is obtained. In this case, due to the confined gas gap and bi-polar pulse power arrangements, the spectra obtained are very narrow, having an FWHM of 1.7 nm. Applied voltage, frequency and gas pressure are optimized to get high electrical-to-optical conversion efficiency of the lamp. The measured radiated intensity at the applied input electrical power of 31 W from the optimized lamp is ∼2.5 mW cm−2, which results in the electrical to optical conversion efficiency as high as 12.5%. The bacterial efficiency of the developed lamp is also examined on pathogenic gram-positive (S. aureus) and gram-negative (E. coli) bacteria. Complete inactivation of S. aureus and E. coli has been achieved at a UV dose of 3 mJ/cm2 and 12 mJ cm–2, respectively. Morphological studies of treated bacteria have also been performed to correlate the results.
Well-posedness and an Euler-Maruyama method for multi-term caputo tempered fractional stochastic differential equations
Authors: Huang Jianfei , Shao Linxin , Liu Jiahui 
Published: January 2024

Abstract
In this paper, we first prove the existence, uniqueness and continuity dependence on the initial value of multi-term Caputo tempered fractional stochastic differential equations with initial value. Then, an Euler-Maruyama (EM) method is presented for solving the considered equation. The strong convergence of the presented EM method is strictly investigated with the order to be

min
{

α

m

−

α

m
−
1

,

α

m

−
0.5
}

with 0 < α
1 < α
2 < ⋯ < α

m−1 < α

m
< 1, α

m
> 0.5, and m is a given positive integer. Finally, three numerical examples are provided to support our theoretical findings.