bluuebunny/crossref_metadata_2025_split huggingface dataset:
Probing the interplay of interactions, screening and strain in monolayer MoS2 via self-intercalation
Authors: Pielić Borna , Mužević Matko , Novko Dino , Cai Jiaqi , Bremerich Alice , Ohmann Robin , Kralj Marko , Šrut Rakić Iva , Busse Carsten 
Published: September 2024

AbstractControlling many-body interactions in two-dimensional systems remains a formidable task from the perspective of both fundamental physics and application. Here, we explore remarkable electronic structure alterations of MoS2 monolayer islands on graphene on Ir(111) induced by non-invasive self-intercalation. This introduces significant differences in morphology and strain of MoS2 as a result of the modified interaction with the substrate. Consequently, considerable changes of the band gap and non-rigid electronic shifts of valleys are detected, which are a combined effect of the screening of the many-body interactions and strain in MoS2. Furthermore, theory shows that each substrate leaves a unique stamp on the electronic structure of two-dimensional material in terms of those two parameters, restricted by their correlation.
An analysis of spectroscopic, seismological, astrometric, and photometric masses of pulsating white dwarf stars
Authors: Calcaferro Leila M. , Córsico Alejandro H. , Uzundag Murat , Althaus Leandro G. , Kepler S. O. , Werner Klaus 
Published: September 2024

Context. A central challenge in the field of stellar astrophysics lies in accurately determining the mass of stars, particularly when dealing with isolated ones. However, for pulsating white dwarf stars, the task becomes more tractable due to the availability of multiple approaches such as spectroscopy, asteroseismology, astrometry, and photometry, each providing valuable insights into the mass properties of white dwarf stars.
Aims. Numerous asteroseismological studies of white dwarfs have been published, focusing on determining stellar mass using pulsational spectra and comparing it with spectroscopic mass, which uses surface temperature and gravity. The objective of this work is to compare these mass values in detail and, in turn, to compare them with the mass values derived using astrometric parallaxes or distances and photometry data from Gaia, employing astrometric and photometric methods.
Methods. Our analysis involves a selection of pulsating white dwarfs with different surface chemical abundances that define the main classes of variable white dwarfs. We calculated their spectroscopic masses, compiled seismological masses, and determined astrometric masses. We also derived photometric masses, when possible. Subsequently, we compared all the sets of stellar masses obtained through these different methods. To ensure consistency and robustness in our comparisons, we used identical white dwarf models and evolutionary tracks across all four methods.
Results. The analysis suggests a general consensus among the four methods regarding the masses of pulsating white dwarfs with hydrogen-rich atmospheres, known as DAV or ZZ Ceti stars, especially for objects with masses below approximately 0.75 M⊙, although notable disparities emerge for certain massive stars. For pulsating white dwarf stars with helium-rich atmospheres, called DBV or V777 Her stars, we find that astrometric masses generally exceed seismological, spectroscopic, and photometric masses. Finally, while there is agreement among the sets of stellar masses for pulsating white dwarfs with carbon-, oxygen-, and helium-rich atmospheres (designated as GW Vir stars), outliers exist, where mass determinations by various methods show significant discrepancies.
Conclusions. Although a general agreement exists among different methodologies for estimating the mass of pulsating white dwarfs, significant discrepancies are prevalent in many instances. This shows the need to redo the determination of spectroscopic parameters and the parallax and/or improve asteroseismological models for many stars.
Spectral aging analysis of the 3C 219 double-double radio galaxy
Authors: Wolnik K. , Jurusik W. , Jamrozy M. 
Published: September 2024

Context. Double-double radio galaxies are characterized by intermittent jet-formation activity. The exact reasons for this behavior are not yet fully understood. Studying these objects and their environment allows us to find common characteristics and compare them with the general population of radio galaxies. 3C 219 is a well-known and thoroughly studied radio galaxy. Among the many explanations for its unusual “partial jet” structure, intermittent activity seems to be the leading one. However, this hypothesis has never been tested using aging analysis.
Aims. The aim of this paper is to put constraints on the active galactic nucleus duty cycle and dynamics of radio lobe expansion in 3C 219, in both the inner and outer double. This will provide us with information on the behavior of the central engine and the interaction of the radio lobes with the ambient medium, allowing us to verify whether the structure of 3C 219 is the result of intermittent activity and to search for its possible causes.
Methods. We performed a spectral aging analysis of the 3C 219 double-double radio galaxy using archival Karl G. Jansky Very Large Array and Low Frequency Array data. We present detailed spectral age maps and constructed a spectral age profile. We compared ratios of linear sizes and luminosities in individual phases of activity with lobe expansion velocities in the plane of the sky derived from the age profile to infer hot-spot advance velocities through the surrounding medium and the orientation of the jet axes.
Results. The galaxy shows a general asymmetry in the distribution of plasma with respect to the inferred jet axis in the original phase of activity, suggesting an influence of the intracluster medium on the formation of the radio structure. The advance speed of hot spots in the outer double is typical of classical FRII sources expanding into an ambient thermal medium, while for the inner double, the lower limit is estimated to be ∼0.28 c. The radio galaxy has experienced a very short quiescent period of no more than 2 Myr, which is ≲7% of its total lifetime.
Conclusions. The most plausible explanation for the double-double radio structure in 3C 219 is a rapid jet reorientation along the line of sight, which may be the result of a minor merger. Further study of the 3C 219 inner double is needed. High-resolution maps are required to probe its structure in sufficient detail, while high-frequency observations are necessary to better constrain the durations of the quiescent and restarted phases.
Probing the physics of star formation (ProPStar)
Authors: Pineda Jaime E. , Soler Juan D. , Offner Stella , Koch Eric W. , Segura-Cox Dominique M. , Neri Roberto , Kuffmeier Michael , Ivlev Alexei V. , Teresa Valdivia-Mena Maria , Sipilä Olli , Jose Maureira Maria , Caselli Paola , Cunningham Nichol , Schmiedeke Anika , Gieser Caroline , Chen Michael , Spezzano Silvia 
Published: September 2024

Context. Turbulence is a key component of molecular cloud structure. It is usually described by a cascade of energy down to the dissipation scale. The power spectrum for subsonic incompressible turbulence is ∝k−5/3, while for supersonic turbulence it is ∝k−2.
Aims. We determine the power spectrum in an actively star-forming molecular cloud, from parsec scales down to the expected magnetohydrodynamic (MHD) wave cutoff (dissipation scale).
Methods. We analyzed observations of the nearby NGC 1333 star-forming region in three different tracers to cover the different scales from ∼10 pc down to 20 mpc. The largest scales are covered with the low-density gas tracer 13CO (1–0) obtained with a single dish, the intermediate scales are covered with single-dish observations of the C18O (3–2) line, while the smallest scales are covered in H13CO+ (1–0) and HNC (1–0) with a combination of NOEMA interferometer and IRAM 30m single-dish observations. The complementarity of these observations enables us to generate a combined power spectrum covering more than two orders of magnitude in spatial scale.
Results. We derive the power spectrum in an active star-forming region spanning more than 2 decades of spatial scales. The power spectrum of the intensity maps shows a single power-law behavior, with an exponent of 2.9 ± 0.1 and no evidence of dissipation. Moreover, there is evidence that the power spectrum of the ions to have more power at smaller scales than the neutrals, which is opposite to the theoretical expectations.
Conclusions. We show new possibilities for studying the dissipation of energy at small scales in star-forming regions provided by interferometric observations.
Induction of Labor Using Castor Oil Cocktail – an Analysis of Real-world Data
Authors: Ziegler Stefanie Mona , Heimann Yvonne , Schleussner Ekkehard , Weschenfelder Friederike , Groten Tanja 
Published: September 2024

AbstractInduction of labor is indicated when benefits of delivery outweigh benefits of prolonged pregnancy, which is not always welcomed by women. Castor oil is accepted as an “old household remedy” for labor induction but is not yet part of the official guidelines. Nevertheless, it is often used, mostly even before the women are admitted to the hospital. Data on its actual benefits and safety are missing. Upon accepting the real-world practice of applying castor oil cocktail for labor induction we added castor oil as one option of labor induction in our clinical routine for multiparous women at term, with a history of at least one vaginal delivery. Here we aimed to generate data on the effectivity and safety of castor oil in labor induction by analyzing the real-world data generated in our cohort.In our retrospective analysis we included data of a cohort of 148 multiparous women induced by castor oil cocktail and of 286 matched controls receiving established methods according to the current guidelines for labor induction. The castor oil cocktail was prepared following a standardized recipe with quality-tested castor oil. Statistical analysis was performed with SPSS 27.0.Perinatal outcome data including the rate of vaginal deliveries did not differ between groups, except significantly more neonates were admitted to the neonatal intensive care unit in the group receiving established methods for induction of labor (p = 0.01). In 39 women (26%), administration of castor oil cocktail alone failed to induce labor. The time from initiation of labor induction until delivery was significantly shorter in the castor oil cocktail group (p = 0.04).Our study demonstrates the safety and effectivity of a castor oil cocktail induction in multiparous women at term in a hospital-based setting using quality-controlled castor oil in a standardized recipe.
Synthesis of Substituted 1-Benzyl-2H-1,2,3-Triazoles by a Click Reaction Using Calcium Carbide as an Acetylene Source
Authors: Fu Rugang , Lei Yuming , Wang Yuyu , Huang Baoqian , Qiu Dong , Wang Junke 
Published: September 2024

AbstractAn effective strategy for constructing substituted 1-benzyl-1H-1,2,3-triazoles was developed through click reactions of benzylic halides with sodium azide and calcium carbide as sources of nitrogen and acetylene, respectively. The advantages of this method are an easily handled inexpensive source of acetylene, a wide range of substrates, satisfactory yields, and simple workup procedures, which could promote the use of calcium carbide as a sustainable acetylene source in modern industrial chemistry.
Obstructive Sleep Apnoea and Type 1 Diabetes Mellitus: A Neglected
Relationship?
Authors: Panou Theodoros , Roukas Konstantinos , Chadia Konstantina , Nena Evangelia , Gouveri Evanthia , Papanas Nikolaos , Steiropoulos Paschalis 
Published: September 2024

AbstractObstructive sleep apnoea (OSA) is regarded as a major health condition,
progressively affecting an increased number of people around the world. The
interplay between OSA and type 2 diabetes mellitus (T2DM) has been extensively
studied. However, little is known about the relationship between OSA and type 1
diabetes mellitus (T1DM). This review provides insight into the prevalence of
OSA in T1DM and its relationship with diabetic complications. Studies have
hitherto yielded contradictory results on the occurrence of OSA in T1DM. Indeed,
the risk of OSA in T1DM has ranged from 1 in 10 to more than 1 in 2 T1DM
subjects. This high occurrence was confirmed by objective polysomnography as
well as widely used subjective questionnaires. Multiple studies revealed the
important correlation between OSA and diabetes complications. Both microvascular
(nephropathy, neuropathy and retinopathy) and macrovascular complications appear
to be associated with OSA occurrence, although some associations were not
significant due to inadequate data. In conclusion, T1DM subjects carry a higher
risk of undiagnosed OSA. Additional studies are needed to clarify the exact
correlation between the two conditions.
Improving heat tolerance in betel palm (Areca catechu) by characterisation and expression analyses of heat shock proteins under thermal stress
Authors: Alam Osama , Khan Adeel , Khan Wasi Ullah , Khan Waqas Ahmad , Ahmad Mushtaq , Khan Latif Ullah 
Published: September 2024

Context Heat shock proteins play a vital role in cellular homeostasis by protecting proteins against various environmental stresses, which facilitates the survival of plants under unfavourable conditions. Aims We aimed to provide the first comprehensive genomic and expression analysis of the HSP70 gene family in betel palm (Areca catechu) to elucidate its role in heat stress response. Methods Genomic analysis revealed 34 putative HSP70 genes distributed across 13 chromosomes. These were renamed AcatHSP70 and classified into five subfamilies (A–E) based on phylogenetic analysis. These genes are mostly localised in the chloroplast, cytoplasm, and nucleus. Gene ontology revealed that these genes are mostly involved in heat stress. The gene duplication events of HSP70 genes involved only segmental duplications. We subjected betel palm seedlings (2 years old) to heat stress under controlled conditions for 30 days at high, low, and room temperatures for expression analyses of HSP70 genes. Key results Expression analysis revealed eight putative candidate genes (AcatHSP70-3, AcatHSP70-13, AcatHSP70-22, AcatHSP70-19, AcatHSP70-21, AcatHSP70-24, AcatHSP70-25, and AcatHSP70-26) that showed significantly higher expression under high-temperature stress. AcatHSP70-5 showed higher expression under low-temperature treatment, and AcatHSP70-16 was responsive at room temperature treatment. Conclusion We conclude that the majority of AcatHSP70 genes play a crucial role under thermal stress conditions, and respond to high-temperature stress as shown by the quantitative reverse transcription polymerase chain reaction analysis. Implications This comprehensive characterisation of the HSP70 gene family provides novel insights into the thermal protection mechanisms of betel palms in changing climates.
Evaluation of Bosch processing and C4F8 plasma deposition at cryogenic temperatures
Authors: Nos Jack , Dussart Rémi , Tillocher Thomas , Lefaucheux Philippe , Boufnichel Mohamed 
Published: September 2024

Abstract
The Bosch process was studied at a substrate temperature of −100 °C and compared to etchings performed at room temperature, as in the general case. The tests were realized using an inductively coupled plasma reactor by varying C4F8 passivating gas flow injections both at +20 °C and −100 °C. It was observed that the Bosch process is effectively temperature dependent and that the necessary C4F8 passivating gas flow can be reduced to obtain similar anisotropic profiles at −100 °C compared to the ambient temperature process. For example, in one of the studied cases, a fluorocarbon injection of 8 sccm was sufficient to obtain an anisotropic etch rate of up to 4.4 μm min−1 at −100 °C whereas the profile obtained at +20 °C using the same parameters presents lateral etching defects with a reduced etch rate of 2.4 μm min−1. At this point, the C4F8 flow must be increased to 12 sccm (50% more) to retrieve an anisotropic profile with an etch rate of 4.0 μm min−1. In the case of cryogenic Bosch (cryo-Bosch) processing, C4F8 feed dosing has a greater influence on the passivation regime which affects the subsequent etching result but it can be easily refined through the optimization of process parameters. An in-situ ellipsometry study of the deposition rate of C4F8 on both polycrystalline silicon (p-Si) and SiO2 substrates was realized by varying the gas flow at −100 °C and +20 °C. This study shows that the deposited fluorocarbon material is approximately a hundred times thicker at cryogenic temperatures using the same process parameters. Scanning electron microscopy (SEM) observation of these samples are in adequacy with the ellipsometry results. Cryo–Bosch etching also results in a slightly higher etch rate compared to room temperature processing when analyzing similar anisotropic profiles. Si:SiO2 etching selectivity is significantly increased at −100 °C although the aspect-ratio dependent etching phenomenon is more important.
Pressure-induced magnetic and topological transitions in non-centrosymmetric MnIn2Te4
Authors: Bose Anumita , Banerjee Rajdeep , Narayan Awadhesh 
Published: September 2024

Abstract
In recent years, the study of magnetic topological materials, with their variety of exotic physics, has significantly flourished. In this work, we predict the interplay of magnetism and topology in the non-centrosymmetric ternary manganese compound MnIn2Te4 under external hydrostatic pressure, using first-principles calculations and symmetry analyses. At ambient pressure, the ground state of the system is an antiferromagnetic insulator. With the application of a small hydrostatic pressure (∼0.50 GPa), it undergoes a magnetic transition, and the ferromagnetic state becomes energetically favorable. At ∼2.92 GPa, the ferromagnetic system undergoes a transition into a Weyl semimetallic phase, which hosts multiple Weyl points in the bulk. The presence of non-trivial Weyl points have been verified by Wilson bands computations and the presence of characteristic surface Fermi arcs. Remarkably, we discover that the number of Weyl points in this system can be controlled by pressure and that these manifest in an anomalous Hall conductivity (AHC). In addition to proposing a new candidate magnetic topological material, our work demonstrates that pressure can be an effective way to induce and control topological phases, as well as AHC, in magnetic materials. These properties may allow our proposed material to be used as a novel pressure-controlled Hall switch.
Cavity ionization chamber responses in the JAEA and the NMIJ high-energy photon reference fields for radiation protection
Authors: Ishii Junya , Shimizu Morihito , Kato Masahiro , Kurosawa Tadahiro , Tsuji Tomoya , Yoshitomi Hiroshi , Tanimura Yoshihiko , Watabe Hiroshi 
Published: September 2024

Abstract
A dosimeter should ideally be calibrated in a reference field with similar energy and doserate to that which the dosimeter is being used to measure. Environments around nuclear reactors and radiation therapy facilities have high-energy photons with energies exceeding that of 60Co gamma rays, and controlling exposure to these photons is important. The Japan Atomic Energy Agency and National Metrology Institute of Japan have high-energy reference fields with energies above several megaelectronvolts for different types of accelerators. Their reference fields have different fluence-energy distributions. In this study, the energy dependencies of the two-cavity ionization chambers, which are often used by secondary standard laboratories, were experimentally and computationally evaluated for each high-energy field. These results agreed well within the relative expanded uncertainties (k = 2), and their capabilities for air kerma measurements in each high-energy reference field were confirmed. Therefore, the capabilities of the air-kerma measurements were verified in the two high-energy reference fields.
Measurement and machining error assessment method for cycloid pump rotor profile based on STEP
Authors: Xu Kai , Xiao Ying , Dai Zhen , Li Tianxing 
Published: September 2024

Abstract
The contour shape and machining precision of the rotor of an cycloid pump directly determine the sealing performance of the pump cavity. Precise measurement of contour machining errors is a crucial step in the manufacturing process. However, rotor contour curves are often designed by enterprises based on actual engineering needs, leading to inconsistency between the measured baseline contour and the designed contour, thus failing to accurately reflect the actual machining condition of the rotor. Therefore, this paper proposes a method for measuring the contour of the cycloid pump rotor and evaluating machining errors based on the standard for the exchange of product (STEP) files necessary for product design in manufacturing. Firstly, utilizing NX/OPEN API functions, contour coordinate points and unit normal vectors are obtained from the rotor’s STEP design data. Subsequently, by planning the process of measuring the closed continuous contour of the rotor, the transformation between the workpiece coordinate system and the measurement coordinate system is achieved to position the tested rotor, followed by analyzing the influence of different starting points on error measurement and evaluation determines the optimal starting point. Finally, a measurement sampling point strategy is established to collect data points of the actual machining contour of the rotor. By achieving the best matching between the actual machining contour and the measured baseline contour, a contour deviation calculation model is established. Utilizing gauge blocks enables accurate assessment of pitch deviation, radial runout, and tooth-to-tooth distance deviation, resulting in assessment results that better fit the actual meshing situation of the rotor. Experimental results verifies consistency between the measurements of the one-dimensional probe and Gleason measurements. This theory and method not only expand the measurement range of the one-dimensional probe but also provide more accurate and efficient guidance for the flexible machining of the rotor.
Strong-SLAM: real-time RGB-D visual SLAM in dynamic environments based on StrongSORT
Authors: Huang Wei , Zou Chunlong , Yun Juntong , Jiang Du , Huang Li , Liu Ying , Jiang Guo Zhang , Xie Yuanmin 
Published: September 2024

Abstract
The assumptions of a static environment and scene rigidity are important theoretical underpinnings of traditional visual simultaneous localization and mapping (SLAM) algorithms. However, these assumptions are difficult to work in dynamic environments containing non-rigid objects, and cannot effectively handle the characteristics of local areas of non-rigid moving objects, seriously affecting the robustness and accuracy of the SLAM system in localization and mapping. To address these problems, we improved ORB-SLAM3 and proposed a real-time RGB-D visual SLAM framework for dynamic environments based on StrongSORT—Strong-SLAM. First, we combine YOLOv7-tiny with StrongSORT to match the semantic information of dynamic targets. Optical flow and epipolar constraints are then used to initially extract geometric and motion information between adjacent frames. Subsequently, based on an improved adaptive threshold segmentation algorithm and geometric residuals, a background model and a Gaussian residual model are constructed to further extract the geometric information of dynamic targets. Finally, semantic and geometric information are integrated to perform global feature motion level classification, and motion probabilities and optimization weights are defined to participate in global pose estimation and optimization. Experimental results on the publicly available TUM RGB-D dataset show that Strong-SLAM reduces the absolute trajectory error and relative pose error by at least 90% compared to ORB-SLAM3, achieving performance comparable to the most advanced dynamic SLAM solutions.