bluuebunny/crossref_metadata_2025_split huggingface dataset:
Hydrodynamical simulations of wind interaction in spider systems
Authors: Guerra C. , Meliani Z. , Voisin G. 
Published: July 2024

Context. The detected population of “spiders”, referring to millisecond pulsar binaries, has significantly grown in the past decade thanks to multiwavelength follow-up investigations of unidentified Fermi sources. These systems consist of low-mass stellar companions orbiting rotation-powered millisecond pulsars in short periods of a few hours up to day. Among them, a subset of intriguing objects called transitional millisecond pulsars (tMSPs) has been shown to exhibit a remarkable behavior, transitioning between pulsar-binary and faint low-mass X-ray binary states over a span of a few years.
Aims. Our objective is to study the interaction of stellar winds in tMSPs in order to understand their observational properties. To this end we focus on the parameter range that places the system near Roche-lobe overflow.
Methods. Employing the adaptative mesh refinement (AMR) AMRVAC 2.0 code, we performed 2D hydrodynamical (HD) simulations of the interaction between the flows from both stars, accounting for the effects of gravity and orbital motion.
Results. By studying the mass loss and launch speed of the winds, we successfully recreated two phenomenologically distinct regimes: the accretion stream and the pulsar radio state. We also identified the tipping point that marks the sharp transition between these two states. In the accretion stream state, we discover a very strong variability induced by the pulsar wind. In the pulsar state, we reconstructed the corresponding X-ray light curves of the system that produces the characteristic double-peak pattern of these systems. The position of the peaks is shifted due to orbital motion and the leading peak is weaker due to eclipsing by the companion.
Conclusions. This study highlights the importance of gravity and orbital motion in the interaction between the companion and pulsar winds. Our setup allows the study of the complex interaction between the pulsar wind and an accretion stream during mass transfer. We suggest that a smaller leading peak in X-rays is indicative of a nearly edge-on system.
Magnetism in LAMOST CP stars observed by TESS
Authors: Thomson-Paressant K. , Neiner C. , Labadie-Bartz J. 
Published: July 2024

Context. A thousand new magnetic candidate CP stars have been identified with LAMOST, of which ∼700 prime targets have had rotational modulation determined by TESS.
Aims. We aim to check for the presence of a magnetic field in a subsample of these LAMOST CP stars, test the viability of the 5200 Å depression used to select the mCP candidates in the LAMOST survey as a reliable indicator of magnetism, and expand on the limited database of known magnetic hot stars. The sample includes some pulsators that would be valuable targets for magneto-asteroseismology.
Methods. We selected ∼100 magnetic candidate LAMOST CP stars that present a depression at 5200 Å in their spectrum and that also display rotational modulation in their TESS photometric light curves. We obtained spectropolarimetric observations of 39 targets from this sample with ESPaDOnS at CFHT. We utilised the least squares deconvolution method to generate the mean profile of the Stokes V and I parameters, from which the longitudinal magnetic field strength for each target can be determined. For HD 49198, we performed more in-depth analysis to determine the polar magnetic field strength and configuration.
Results. We detect fields in at least 36 of the 39 targets in our sample. This success rate in detecting a magnetic field (above 92%) is very high compared to the occurrence of magnetic fields in hot stars (∼10%). Four of these newly discovered magnetic stars are magnetic pulsators. In particular, we detect the strongest field around a δ Scuti star discovered to date: a 12 kG dipolar field in HD 49198.
Conclusions. From our analysis, we conclude that using the 5200 Å depression displayed in the spectra in combination with rotational modulation in photometric data is a very reliable method of identifying magnetic candidates in this population of stars.
VVVX survey dusts off a new intermediate-age star cluster in the Milky Way disk
Authors: Garro E. R. , Minniti D. , Alonso-García J. , Fernández-Trincado J. G. , Gómez M. , Palma T. , Saito R. K. , Obasi C. 
Published: July 2024

Context. In the last decade, many new star clusters have been discovered in heavily obscured regions of the Milky Way bulge and disk.
Aims. Our primary long-term objective is to seek out additional star clusters in the poorly studied regions of the Milky Way, where detections pose significant challenges. The aim of this pursuit is to finalize the Milky Way’s globular and open cluster system census and to gain a comprehensive understanding of both the formation and evolution of these systems and our Galaxy as a whole.
Methods. We report the discovery of a new star cluster, named Garro 03. We investigated this new target using a combination of near-infrared and optical databases. We employed the VISTA Variables in the Via Láctea Survey and Two Micron All Sky Survey data in the near-infrared, and the Gaia Data Release 3 and the DECam Plane Survey datasets in the optical passband. We constructed density maps and vector proper motion diagrams in order to highlight our target. We performed a photometrical analysis in order to derive its main physical parameters.
Results. Garro 03 is located at equatorial coordinates RA = 14:01:29.3 and Dec = −65:30:57.0. From our photometric analysis we find that this cluster is not heavily affected by extinction with AKs = 0.25 ± 0.04 mag and AG = 1.54 ± 0.02 mag. It is located at heliocentric distance of 14.1 ± 0.5 kpc, which places Garro 03 at 10.6 kpc from the Galactic centre and Z = −0.89 kpc below the Galactic plane. We also calculated the mean cluster proper motion of (μα*,μδ)=(−4.57 ± 0.29, −1.36 ± 0.27) mas yr−1. We derived an age of 3 Gyr and metallicity [Fe/H] = −0.5 ± 0.2 by the isochrone-fitting method, employing the PARSEC models. The total luminosity was derived in the Ks and V bands, finding MKs = −6.32 ± 1.10 mag and MV = −4.06 mag. Finally, the core and tidal radii were measured constructing the Garro 03 radial density profile and fitting the King model. We obtained rc = 3.07 ± 0.98 pc and rt = 19.36 ± 15.96 pc, respectively.
Conclusions. We photometrically confirm the cluster nature for Garro 03, located in the Galactic disk. It is a distant, low-luminosity, metal-rich star cluster of intermediate age. We also searched for possible signatures (streams or bridges) between Garro 03 and Garro 01, but we exclude a companionship with the present analysis. We need spectroscopic data to classify it as an old open cluster or a young globular cluster, and to understand its origin.
Five- and 18-Year Outcome of Two Cases with Full-Arch Rehabilitations Ad modum All-on-4 in the Presence of Challenging Conditions
Authors: de Araújo Nobre Miguel , Santos Diogo , Ferro Ana , Lopes Armando , Antunes Carolina Jorge , Vitor Inês 
Published: July 2024

AbstractPlacing implants in fresh postextraction sites is a borderline rehabilitation procedure. The purpose of this report is to describe the pre-, per-, and postoperative procedures for maintaining long-term stability of two full-arch rehabilitations through the All-on-4 protocol, performed in the presence of challenging conditions. Two patients were referred for full-arch rehabilitation with immediate function, with both patients presenting infection in the jaws: patient 1 with an implant (position #45) inserted in a cystic cavity; patient 2 with one implant (position #24) inserted transsinus after the removal of a cyst on the base of the maxillary sinus and another implant (position #15) inserted with a dehiscence. Both patients received a preoperative dental hygiene appointment, a regenerative surgical protocol, and were enrolled in a postoperative maintenance protocol. After surgery a provisional prosthesis was provided ensuring immediate function, and 6 months after surgery, the final prosthesis was delivered. During the follow-up appointments (final follow-up at 5 and 18 years), the implants were stable, and no infection was observed for both patients. The present case report describes two full-arch rehabilitations in immediate function, supported by dental implants inserted in the presence of challenging conditions that do not represent the norm, rather are highly demanding for the clinical team, warranting caution in the interpretation of the results.
APOE Polymorphism, Obstructive Sleep Apnea, and Cognitive Function
Authors: Gara Elisangela Macedo , Goya Thiago Tanaka , Ferreira-Silva Rosyvaldo , Matheus Larissa , Jordão Renato Marques , Araújo Marlon Lemos , Silva Alanna Joselle , Guerra Renan Segalla , Lorenzi-Filho Geraldo , Ueno-Pardi Linda Massako 
Published: July 2024

Abstract
Objective Obstructive sleep apnea (OSA) is associated with the apolipoprotein E ε4 polymorphic allele (APOE ε4) and with worse cognitive function. However, the influence of APOE ε4 on cognitive function in patients with moderate-to-severe OSA is controversial. The present study evaluated the influence of APOE ε4 polymorphism and cognitive function in sedentary OSA patients with no other major comorbidities.
Materials and Methods In total, 55 middle-aged patients underwent conventional nocturnal polysomnography, APOE ε4 polymorphism genotyping, cognitive evaluation (attention, inhibitory control, frontal functions, processing speed, and episodic memory), and they filled out the International Physical Activity Questionnaire.
Results Overall, 13 patients had no or mild OSA, and 42 had moderate-to-severe OSA (apnea-hypopnea index [AHI] ≥ 15 events/h of sleep) and APOE ε4 was present in 7.7% and 21.4% of the patients in each group respectively. Among patients with moderate-to-severe OSA, the sleep parameters were similar in the groups of APOE ε4 carriers and noncarriers. Compared with patients with no or mild OSA, the cognitive parameters were worse for processing speed (Digit Symbol Test) and attention (Stroop Color Word Test, SCWT-Part 2) among the patients with moderate-to-severe OSA. The difference was present even after the exclusion of APOE ε4 carriers. Among patients with moderate-to-severe OSA, APOE
ε4 carriers presented worse episodic memory, evaluated through the Rey Auditory Verbal Learning Test, than APOE
ε4 noncarriers.
Conclusion Moderate-to-severe OSA is associated with poor cognitive function that is further impaired by the presence of APOE
ε4 polymorphism.
Soft x-ray high diffraction efficiency and spectral flux laminar-type W/B4C multilayer diffraction grating for 300–1000 eV
Authors: Koike M. , Hatano T. , Pirozhkov A. S. , Oue Y. , Murano T. , Kakio T. , Koshiya S. , Kondo K. , Terauchi M. 
Published: July 2024

Multilayer diffraction gratings are designed to improve the detection limit and sensitivity of soft x-ray flat-field spectrographs in the region of 300–1000 eV, placing emphasis on Fe-L (705 eV), Cu-L (930 eV), and Zn-L (1012 eV) emissions. For this purpose, spectral flux was used as the performance index, which is proportional to the amount of optical flux incident into a detector and correlated with detection sensitivity. A super-mirror-type W/B4C multilayer coating [Koike et al., Rev.Sci. Instrum. 94, 045109 (2023)] was employed to improve diffraction efficiency in a wide energy region. The unique feature of the multilayer structure is that the average refractive index and the period length of W/B4C layer pairs are increased from the bottom to top layers. In addition, the incidence angle was reduced to 86.03° from 88.65° and the nominal groove density was increased to 3200 lines/mm from 2400 lines/mm of our previous design, to improve spectral flux while maintaining dispersion and spectral resolution. A holographic varied-line-spacing spherical grating and a soft x-ray flat-field spectrograph were designed, using the aspherical-wavefront-recording method, assuming the nominal grating constant and incident angle described above. The numerical simulation results showed that the spectrograph employing the newly designed grating with the W/B4C multilayer indicated 3.2–8.2 times higher spectral flux compared with those using the previously designed grating while keeping the same spectral resolution.
Electrical design of the flexible imaging diffraction diagnostic for laser experiments (FIDDLE) at the National Ignition Facility (NIF)—Requirements, design, and performance
Authors: Nyholm P. R. , Palmer N. E. , Petre R. B. , Carpenter A. C. , Nagel S. R. , Bradley D. K. , Vennari C. E. , Golick B. , Boyle D. , Sharp A. M. , Morioka S. B. , Mackinnon A. J. , Benedetti L. R. 
Published: July 2024

The Flexible Imaging Diffraction Diagnostic for Laser Experiments (FIDDLE) is a newly developed diagnostic for imaging time resolved diffraction in experiments at the National Ignition Facility (NIF). It builds on the successes of its predecessor, the Gated Diffraction Development Diagnostic (G3D). The FIDDLE was designed to support eight Daedalus version 2 sensors (six more hCMOS sensors than any other hCMOS-based diagnostic in NIF to date) and an integrated streak camera. We will review the electrical requirements, design, and performance of the electrical subsystems that were created to support this large number of cameras in the FIDDLE. The analysis of the data that the FIDDLE is intended to collect relies heavily on the accurate and well-understood timing of each sensor. We report camera-to-camera timing jitter of less than 100 ps rms and sensor integration times of 2.2 ns FWHM in 2-2 timing mode. Additionally, diffraction experiments on the NIF produce electric fields (EMI) on the order of 1 kV/m, which have been observed to negatively impact the performance of some electrical components of the FIDDLE. We report on the results of testing hCMOS camera electronics in a similar EMI environment generated in an offline lab. We also summarize the use of a novel approach to using a vector network analyzer as an EMI leak detector to understand and reduce the negative impacts of EMI on the FIDDLE.
Exploring positional and dimensional aspects of topographic space for advanced-level British Sign Language
learners
Authors: Nunn Nicola 
Published: July 2024

Abstract
This study investigates how British Sign Language (BSL) learners develop positional and dimensional aspects of
topographic space. The teaching of BSL has been occurring at an increasing rate, and many people are learning to use BSL to the
advanced levels, which are generally referred to in the UK as BSL Levels 4 and 6 and are loosely equivalent to pre-C1 (advanced)
and C1 (proficient), respectively, on the Common European Framework for Reference (Languages) scale. Spatial grammar is a crucial
aspect of BSL (Brennan 1992), and this article provides insight into issues related to
learning how to use topographic space, a feature of spatial grammar whereby real-world referent locations are replicated in the
signing production. This study of L2 advanced learners of BSL explores the numbers and types of errors that are made when applying
topographic features into their signing, with a particular focus on positioning and dimensionality aspects. Two scenarios are used
do this: classroom layouts (Task 1) and a courtroom layout (Task 2). The study concludes with reflections on how BSL teachers can
support L2 learners in improving their development of topographic skills.
A relativistic scalar model for fractional interaction between dark matter and gravity
Authors: Benetti Francesco , Lapi Andrea , Gandolfi Giovanni , Liberati Stefano 
Published: July 2024

Abstract
In a series of recent papers we put forward a ‘fractional gravity’ framework striking an intermediate course between a modified gravity theory and an exotic dark matter (DM) scenario, which envisages the DM component in virialized halos to feel a non-local interaction mediated by gravity. The remarkable success of this model in reproducing several aspects of DM phenomenology motivates us to look for a general relativistic extension. Specifically, we propose a theory, dubbed Relativistic Scalar Fractional Gravity or RSFG, in which the trace of the DM stress-energy tensor couples to the scalar curvature via a non-local operator constructed with a fractional power of the d’Alembertian. We derive the field equations starting from an action principle, and then we investigate their weak field limit, demonstrating that in the Newtonian approximation the fractional gravity setup of our previous works is recovered. We compute the first-order post-Newtonian parameter γ and its relation with weak lensing, showing that although in RSFG the former deviates from its GR values of unity, the latter is unaffected. We also perform a standard scalar-vector-tensor-decomposition of RSFG in the weak field limit, to highlight that gravitational waves propagate at the speed of light, though also an additional scalar mode becomes dynamical. Finally, we derive the modified conservation laws of the DM stress energy tensor in RSFG, showing that a new non-local force emerges, and hence that the DM fluid deviates from the geodesic solutions of the field equations.
Marker points 3D matching based on Delaunay triangfulation structure and error dispersion
Authors: Jin Ruidi , Wang Zhao , Huang Junhui , Li Zijun , Duan Qiongqiong , Qi Miaowei , Wang Wei , Dong Qiang 
Published: July 2024

Abstract
Point cloud registration techniques based on marker points are widely used in optical 3D industrial measurements. However, in this process, marker points 3D matching methods are often haunted by low efficiency and accuracy. To improve the performance of marker points 3D matching, we propose a two-step method of ‘matching-verification’. In the matching process, Delaunay triangulation is introduced to extract the 3D structure of the marker points set, and then the 3D structure is deconstructed into 2D units for matching, which simplifies complexity and improves the efficiency of the algorithm. In the verification process, the mismatched pairs of points are located and removed by the method that is based on the error dispersion of initial matched results, and the initial transformation results are iteratively verified to obtain the optimal transformation matrix. The experimental results show that our method takes an average of 2.2 s for each matching, the average error of coarse registration point cloud is 0.075 mm and the root mean square is 0.219 mm, which effectively solves the problem of the low efficiency and accuracy of marker points 3D matching methods.
PPP based on factor graph optimization
Authors: Xiao Guorui , Xiao Zhengyang , Zhou Peiyuan , Jia Xiaoxue , Wang Ningbo , Zhao Dongqing , Wei Haopeng 
Published: July 2024

Abstract
Kalman or Kalman-related filtering methods are routinely applied in precise point positioning (PPP). However, in robot simultaneous localization and mapping (SLAM) systems, factor graph optimization (FGO) has proven advantages over filtering methods in recent years, e.g. reducing the linearization error and support of plug-and-play features for multiple sensor fusion. Therefore, it would be interesting to apply the FGO to PPP. In addition, it will also facilitate the tight integration of PPP with Visual/LiDAR SLAM. In this work, PPP is solved under the FGO framework. A factor graph for PPP has been constructed. Results from 268 IGS-MGEX stations show that the FGO method can achieve a similar performance to that of Kalman filtering. First, the positioning accuracy in the convergence period can be improved for PPP based on FGO because it optimizes the entire state variables based on all the available observations. For applications that do not require real-time processing, the observation after the current state, e.g. future observations, can also be used to enhance the current state estimation. Second, the accuracy of static PPP is almost the same for the two methods with millimeter-accuracy for horizontal directions and centimeter-accuracy for vertical directions. Third, the kinematic PPP for both methods can achieve centimeter-level accuracy in horizontal directions and decimeter-level accuracy in vertical directions. Although the performance is comparable, it is noted that the computational efficiency of the FGO method is still a problem. For each epoch, the average elapsed time for Kalman filtering is 132 microseconds, while that of FGO method is 9664 microseconds. The elapsed time of the FGO method can be further improved if the fix-window optimization technique is applied, which will be investigated in the future.
A fault diagnosis approach for flange stabilizer based on multi-signal fusion
Authors: Chen Fan , Wei Haotian , Li Yong , Wang Luming , Xu Lushuai , Dong Shaohua , Zhang Hang 
Published: July 2024

Abstract
As an essential means of energy transportation, pipelines have been widely used in various fields. However, many external factors such as vibration and corrosion can cause damage at the flange part, which seriously affects the safety of pipeline transportation. Quite a number of methods for troubleshooting at pipeline flanges have been continuously proposed, yet there is little research on diagnostic methods for the stabilizer at the flange. Therefore, in this paper, we focus on the stabilizer of the flange and a method that combines traditional detection and machine learning with each other to detect stabilizer faults is proposed. At first, we can obtain a stable and reliable diagnostic data by combining the advantages of the preload of the bolt and the acoustic signal. Subsequently, the optimized N-Beats model is trained based on the measured bolt preload data to predict the service state of the stabilizer. Finally, the data measured by the sensors as well as the predicted data are analyzed by a simplified classification algorithm to determine whether a fault has occurred and to classify the fault. The fault detection method used in this paper not only improves the accuracy of detection and shortens the fault detection time, but also improves the automation level of pipeline inspection. Hence, the work done in this paper has far-reaching practical significance for ensuring the safe and stable operation of pipelines.
Deep quality-related stacked isomorphic autoencoder for batch process quality prediction
Authors: Zhang Yan , Cao Jie , Zhao Xiaoqiang , Hui Yongyong 
Published: July 2024

Abstract
Batch processes play an important role in modern chemical industrial and manufacturing production, while the control of product quality relies largely on online quality prediction. However, the complex nonlinearity of batch process and the dispersion of quality-related features may affect the quality prediction performance. In this paper, a deep quality-related stacked isomorphic autoencoder for batch process quality prediction is proposed. Firstly, the raw input data are reconstructed layer-by-layer by isomorphic autoencoder and the raw data features are obtained. Secondly, the quality-related information is enhanced by analyzing the correlation between the isomorphic feature of each layer of the network and the output target, and constructing a correlation loss function. Thirdly, a deep quality-related prediction model is constructed to predict the batch process quality variables. Finally, experimental validation was carried out in penicillin fermentation simulation platform and strip hot rolling process, and the experimental results demonstrated the feasibility and effectiveness of the model proposed in this paper for the quality prediction of the batch process.