bluuebunny/crossref_metadata_2025_split huggingface dataset:
Numerical study of magneto convective ag (silver) graphene oxide (GO) hybrid nanofluid in a square enclosure with hot and cold slits and internal heat generation/absorption
Authors: Rajenderan Elayaraja , Prasad V. Ramachandra 
Published: October 2024

AbstractEnergy transmission is widely used in various engineering industries. In recent times, the utilization of hybrid nanofluids has become one of the most popular choices in various industrial fields to increase thermal performance and enhance power generation, entropy reduction, solar collectors, and solar systems. Motivated by this wide range of applications, the present article explores the mixed convection flow and heat transfer of magnetohydrodynamic $$\:Ag$$ (Silver) and $$\:GO$$ (Graphene) nanofluids hybrid nanofluids in a square enclosure with heat generation/absorption by using the MAC method. The vertical walls of the enclosure are assumed to be adiabatic. The horizontal walls are also assumed adiabatic except for the center portion of the top and bottom walls of the cavity. The center portion of the horizontal upper wall is maintained as a cold is $$\:{(T}_{c})$$and the lower wall is maintained as hot $$\:\left({T}_{h}\right)$$. The dimension equations are transformed into dimensionless form and then discretized and solved with the finite difference Marker and cell (MAC) method. Numerical modelling is implemented, by changing Richardson number $$\:\left(Ri\right)$$, The results are located graphically using MATLAB software. The Nusselt number graph was displayed for the Reynolds number (Re), Richardson number$$\:\:\left(Ri\right)$$, and Hartmann number $$\:\left(Ha\right)$$. The findings show that enhancing the values of the Richardson number and Reynolds number enhances the Nusselt number values except for the Hartmann number. The findings indicate that the combination of the new model is very good at predicting thermal conductivity and correlates experimental results well. The augmenting strength of magnetic force diminishes fluid flow. Developing the coefficients for the heat source and sink improves energy transmission and heat transfer enhancement. Hybrid nanofluids like $$\:Ag-GO$$ enhance heat transfer and efficiency. They improve cooling in heat exchangers, radiators, and electronics, boost solar energy systems, aid in cancer treatment and drug delivery, enhance geothermal and wind turbine efficiency, and improve manufacturing processes. Overall, they optimize thermal management in various applications.
A novel model of cardiovascular–kidney–metabolic syndrome combining unilateral nephrectomy and high-salt–sugar–fat diet in mice
Authors: Carvalho Lucas Rannier R. A. , Shimari Miho , Boeder Ariela Maína , Zhuge Zhengbing , Cai Min , Leijding Cecilia , Gastaldello Stefano , Kleschyov Andrei L. , Schiffer Tomas A. , Guimarães Drielle Dantas , Picozzi Gaia , Lund Lars H. , Fellström Bengt , Weitzberg Eddie , Lundberg Jon O. , Hagberg Carolina E. , Pironti Gianluigi , Andersson Daniel C. , Carlström Mattias 
Published: October 2024

AbstractThe aim of this study was to explore biological interaction and pathophysiology mechanisms in a new mouse model of cardiovascular–kidney–metabolic (CKM) syndrome, induced by chronic moderate renal failure in combination with consumption of a customized Western diet rich in carbohydrates, fat and salt. Male C57BL/6J mice were subjected to unilateral nephrectomy, fed a customized Western diet rich not only in sugar and fat but also in salt, and followed for 12 weeks or 20 weeks. Sham-operated mice on a standard chow served as healthy controls. Body composition, weight gain, glucose metabolism, fat distribution, blood pressure, cardiac function, vascular reactivity, renal function, inflammation and mitochondrial function were measured and combined with biochemical and histopathological analyses. The novel triple-hit model of CKM syndrome showed signs and symptoms of metabolic syndrome, disturbed glucose metabolism, impaired adipocyte physiology and fat redistribution, cardiovascular dysfunction, renal damage and dysfunction, systemic inflammation, elevated blood pressure and cardiac remodeling. The pathological changes were more pronounced in mice after prolonged exposure for 20 weeks, but no deaths occurred. In the present mouse model of CKM syndrome, profound and significant metabolic, cardiac, vascular and renal dysfunctions and injuries emerged by using a Western diet rich not only in fat and carbohydrates but also in salt. This multisystem disease model could be used for mechanistic studies and the evaluation of new therapeutic strategies.
Variability of young stellar objects in the Orion nebula
Authors: Noroozi S. , Chen Z. , García-Díaz Ma. T. , González-Buitrago D. H. 
Published: October 2024

Context. The Orion Nebula is one of the best-studied star-forming regions in our Galaxy and provides an ideal laboratory to study the early stages of star formation. Understanding the variability of young stellar objects (YSOs) can provide valuable insights into the underlying physical processes that occur during this crucial phase of stellar evolution. In this context, we have conducted a photometric survey with high temporal resolution of a six-square-degree region centered on NGC 1980. We used two filters (R and I) between 2012 and 2015 with the 15 cm twin telescope RoBoTT at the Universitätssternwarte Bochum in Chile.
Aims. Our goal is to identify and characterize the variable objects in this sample using a unique observational setup that allows us to obtain high-quality light curves with time sampling on the order of minutes. This is the first time such an intensive ground-based photometric campaign has been conducted in the Orion Nebula.
Methods. After careful quality control, more than 13 000 light curves were produced in either R or I; the total number of matched light curves is 11 889. The corresponding stars were subsequently matched with the 2MASS point source catalog, resulting in 8197 stars with I < 16.5 mag and AAA quality flags. We employed three methods – amplitude, standard deviation, and the Stetson J index – to identify variable objects in our sample, successfully classifying 561 stars as variables (irregular, periodic, and quasi-periodic). These stars serve as the foundation for further analysis. We confirmed 456 of these as known pre-main-sequence stars through cross-referencing with existing YSO catalogs, supported by spectroscopic and photometric data. The youth of the remaining stars was established based on their optical and infrared color signatures.
Results. The period, P, could be determined for 147 sources and ranges from 0.2 days to several weeks. The frequency of very short periods (<1 day) is two to four times higher than reported in previous studies. A significant population (10%) comes primarily from weak-line T Tauri stars, which are characterized by rotation periods of less than 1 day. These results emphasize the advantages of observations with an exceptional time sampling strategy that allows the identification of variability on scales from hours to years.
The GAPS programme at TNG
Authors: D’Arpa M. C. , Guilluy G. , Mantovan G. , Biassoni F. , Spinelli R. , Sicilia D. , Locci D. , Maggio A. , Lanza A. F. , Petralia A. , Di Maio C. , Benatti S. , Bonomo A. S. , Borsa F. , Cabona L. , Desidera S. , Fossati L. , Micela G. , Malavolta L. , Mancini L. , Scandariato G. , Sozzetti A. , Stangret M. , Affer L. , Amadori F. , Basilicata M. , Bignamini A. , Boschin W. , Ghedina A. 
Published: October 2024

Context. Atmospheric characterisation plays a key role in the study of exoplanetary systems, giving hints about the current and past conditions of the planets. The information retrieved from the analysis of pivotal lines such as the Hα and He I triplet allow us to constrain the evolutionary path of the planets due to atmospheric photo-evaporation. After focussing for many years on ultra-hot Jupiters, atmospheric characterisation is slowly moving towards smaller and colder planets, which are harder to study due to the difficulties in extracting the planetary signal and which require more precise analysis.
Aims. We aim to characterise the atmosphere of TOI-5398 b (P ~ 10.59 days), the outer warm Saturn orbiting a young (~650 Myr) G-type star that also hosts the small inner planet TOI-5398 c (P ~ 4.77 days). Both planets are suitable for atmospheric probing due to the closeness to their host star, which results in strong photo-evaporation processes, especially the larger outer one with an estimated transmission spectroscopy metric of 288 (higher than those of several well-known hot Jupiters).
Methods. We investigated the atmosphere of planet b, analysing the data collected during a transit with HARPS-N and GIANO-B high-resolution spectrographs, employing both cross-correlation and single-line analysis to study the presence of atomic species. Incidentally, we recorded the simultaneous transit of planet c, and hence we also focussed on discerning the origin of the signal. We expect planet b to be the cause of the detected signal, since, according to existing evaporation models, it is currently expected to lose more mass than planet c.
Results. We detected the presence of Hα and He I triplets, two markers of the photo-evaporation processes predicted for the system, retrieving a height in the atmosphere of 2.33 Rp and 1.65 Rp, respectively. We confirmed these predictions by employing the models computed with the ATES software, which predict a He I absorption arising from planet b comparable with the observed one. Moreover, the ATES models suggested an He/H ratio of 1/99 to match our observations. The investigation of atomic species led to the detection of an Na I doublet via single-line analysis, while the cross-correlation did not return a detection for any of the atomic species investigated.
Single Nucleotide Polymorphisms and Tendon/Ligament Injuries in
Athletes: A Systematic Review and Meta-analysis
Authors: Fukuyama Yumi , Murakami Haruka , Iemitsu Motoyuki 
Published: October 2024

AbstractThis systematic review and meta-analysis aimed to identify the association
between genetic polymorphisms and tendon and ligament injuries in adolescent and
adult athletes of multiple competition sports. The PubMed, Web of Science,
EBSCO, Cochrane Library, and MEDLINE databases were searched until July 7, 2023.
Eligible articles included genetic studies on tendon and ligament injuries and
comparisons between injured and non-injured athletes. This review included 31
articles, comprising 1,687 injury cases and 2,227 controls, from a meta-analysis
of 12 articles. We identified 144 candidate gene polymorphisms (only single
nucleotide polymorphisms were identified). The meta-analyses included vascular
endothelial growth factor A (VEGFA) rs699947, collagen type I alpha 1 rs1800012,
collagen type V alpha 1 rs12722, and matrix metalloproteinase 3 rs679620. The
VEGFA rs699947 polymorphism showed a lower risk of injuries in athletes with the
C allele ([C vs. A]: OR=0.80, 95% CI: 0.65–0.98,
I

2

=3.82%, p=0.03). The risk of these
injuries were not affected by other polymorphisms. In conclusion, the VEGFA
rs699947 polymorphism is associated with the risk of tendon and ligament
injuries in athletes. This study provides insights into genetic variations that
contribute to our understanding of the risk factors for such injuries in
athletes.
‘Like to comment on that?’
Authors: Živković Branka , Vuković-Stamatović Milica 
Published: October 2024

Abstract
Questions are powerful interactional devices which academic lecturers may use to facilitate learning, engage
students and add to a lecture’s interactivity. This contrastive and corpus-based study examines student-oriented questions, i.e.
those initiating a student response, in British and Montenegrin university linguistics lectures. It aims to answer research
questions regarding what forms of this question category are employed; how frequent they are, what functions they commonly
perform, and whether there are any similarities and differences in these respects between the two groups of lectures. The data
include 12 lectures in linguistics from several British academic corpora and a specially created corpus of 12 Montenegrin
linguistics lectures. We combine quantitative and qualitative approaches to arrive at results which point to certain similarities
and differences between the corpora. Some of these might be explained by the language differences between English and BCMS
(Bosnian/Croatian/Montenegrin/Serbian), while others seem to have stemmed from academic lecturing style differences. The findings
add to the literature on questions in academic lectures and, together with other contrastive studies, may contribute to revealing
the universal and culturally-specific discourse features of academic lectures across academic cultures, as well as be
pedagogically useful for lecturers, particularly novices, who are teaching linguistics in English and BCMS.
Dynamical system analysis in modified Galileon cosmology
Authors: Duchaniya L K , Mishra B , Fomin I V , Chervon S V 
Published: October 2024

AbstractIn this paper, we have investigated the phase space analysis in modified Galileon cosmology, where the Galileon term is considered a coupled scalar field,F(ϕ). We focus on the exponential type function ofF(ϕ)and the three well-motivated potential functionsV(ϕ). We obtain the critical points of the autonomous system, along with their stability conditions and cosmological properties. The critical points of the autonomous system describe different phases of the Universe. The scaling solution for critical points was found in our analysis to determine the matter-dark energy and radiation-dark energy-dominated eras of the Universe. In these scaling solutions, dark energy is typically introduced alongside another component, such as radiation or matter, and helps explain the transition between cosmological eras. The dark energy dominated critical points show stable behavior and indicate the late-time cosmic acceleration phase of the Universe. Further, the results are examined with the Hubble rateH(z) and the Supernovae Ia cosmological data sets.
Electrically controlled nonlocal transport in antiferromagnet/superconductor junctions with Rashba spin-orbital coupling
Authors: Cai Lu Ming , Niu Zhi Ping 
Published: October 2024

Abstract
We theoretically investigate nonlocal transport phenomena at an antiferromagnet/normal/superconductor/antiferromagnet junction. Both parallel and antiparallel configurations are considered, with the Néel vector aligned with the z axis in the left antiferromagnet and with the z and -z axes in the right antiferromagnet, respectively. In the parallel configuration, only equal-spin crossed Andreev reflection (CAR) is allowed, as the conventional CAR is forbidden. As the Rashba spin-orbital coupling strength increases in the normal region, the amplitude of equal-spin CAR increases while the amplitude of electron elastic cotunneling (EC) decreases, resulting in equal-spin CAR-dominant nonlocal transport. In the antiparallel configuration, a CAR-dominant nonlocal transport is observed at low Rashba spin-orbital coupling strength, with the conventional CAR process being finite. Furthermore, our results indicate that increasing the staggered sublattice potential enhances the conventional CAR in the parallel configuration, and conversely, in the antiparallel configuration at high Rashba spin-orbital coupling strength, it reduces CAR dominance in favor of EC processes. Therefore, by adjusting the Rashba spin-orbital coupling strength and staggered sublattice potential, CAR-dominant nonlocal transport can be achieved in both the parallel and antiparallel configurations.
TCP-UQ: two-color pyrometry uncertainty quantification using high speed color cameras
Authors: Retfalvi Kolos , Georgalis Georgios , Patra Abani , DesJardin Paul E 
Published: October 2024

Abstract
In this study, an uncertainty quantification method is developed for two-color pyrometry (TCP-UQ), using high-speed color cameras. A NIST traceable calibrated light source is used and the relative exposure is determined using spectrometer measurements and color camera response functions. The inherent digitization and noise uncertainty is estimated from a set of calibration images and characterized with probability distribution functions. These uncertainties are then propagated during TCP to two quantities of interest: the temperature and soot volume fraction measurements. TCP-UQ is applied to a polymethyl methacrylate slab burner experiment to determine the temperature and the soot volume fraction fields. Temperature measurements ranged from 2300

K

to 2800

K

, soot volume fractions are recorded between 0.5 and 10 ppm and are in good agreement with prior measurements reported in the literature. The newly developed TCP-UQ allows for uncertainty estimations in the temperature and the soot volume fraction measurements to be associated with variations in the pixel intensities. For the slab burner experiment, the average uncertainty in the temperature is between 120–140 K and the average uncertainty in the soot volume fraction is around 0.1 ppm. Generally, higher pixel intensities corresponded to lower uncertainty in the temperature measurement.
Investigating the impact of three levels of representation-based visual media on students’ mental models
Authors: Putri Ananda Hafizhah , Suhandi Andi , Samsudin Achmad 
Published: October 2024

Abstract
This study examines the effect of visual media on students’ mental models regarding battery functions and electrical resistance concepts. The study presents a novel visual media approach consisting of phenomena videos, dynamic analogies, and microscopic models. The development of the visual media followed the ADDIE model. The research subjects were 25 12th-grade students from a private senior high school in Bandung, West Java. Students’ mental models were assessed using open-ended test that examined four concepts: (1) electromotive force (EMF) in batteries; (2) electrical resistance; (3) resistors in series; and (4) resistors in parallel. The test were administered as both pre-tests and post-tests.The pre-test results revealed that the majority of students had initial mental models regarding battery functions and electrical resistance concepts. By the end of the study, most students had developed synthetic mental models. However, the majority successfully achieved scientific mental models concerning electrical resistance concepts. In other concepts, only a few students achieved scientific mental models. Overall, the visual media had a significant positive effect on students’ mental models, with corrections observed in 92% of students for EMF in batteries, 96% for electrical resistance, 80% for resistors in series, and 84% for resistors in parallel.These findings encourage physics teachers and researchers to develop innovative visual media focused on correcting students’ mental models in scientific concept learning.
Parameter optimization design of the helmet liner structure for mitigating traumatic brain injury under impact loading
Authors: Gao Feng , Yang Bin , Wu Jinguo , Li Xin , Tse Kwong Ming 
Published: October 2024

Abstract
Helmets play a crucial role in protecting motorcycle riders during two-wheeler accidents by reducing the risk of head injuries. This study investigated the complex interplay between the density, Poisson’s ratio, and Young’s modulus of a helmet liner and their impact on biomechanical factors contributing to traumatic brain injury during collisions. A validated finite element model of a 50th percentile detailed human head was initially used, followed by the development of a coupled helmet head model for collision simulations. The accuracy of the model was assessed by comparing the center-of-mass acceleration data of the head with the experimental results. This study analyzed the von Mises stress, skull stress, and intracranial pressure (ICP),and the results revealed patterns in stress distribution and the potential for cranial and brain injuries. Stress concentrations were observed in the cervical region before the impact, characterized by compressive stress on the impacted side and tensile stress on the opposite side, with peak stress levels found in the temporal bone base and frontal bone. After the impact, brain inertia–driven movements can further increase the risk of traumatic brain injury. The study found a positive correlation between liner density and center-of-mass acceleration of the head in the absence of bottoming out of the liner. By optimizing the liner properties, the study achieved a 4.5% reduction in head acceleration, a 10.1% decrease in skull stress, and a 19.8% reduction in ICP. These findings offer valuable insights for biomechanical research on head injuries caused by traffic accidents and for improving helmet designs to enhance protective measures.
Study of relativistic hot accretion flow around Kerr-like wormhole
Authors: Sen Gargi , Maity Debaprasad , Das Santabrata 
Published: October 2024

Abstract
We investigate the structure of relativistic, low-angular momentum, inviscid advective accretion flow in a stationary axisymmetric Kerr-like wormhole (WH) spacetime, characterized by the spin parameter (a
k), the dimensionless parameter (β), and the source mass (M
WH). In doing so, we self-consistently solve the set of governing equations describing the relativistic accretion flow around a Kerr-like WH in the steady state, and for the first time, we obtain all possible classes of global accretion solutions for transonic as well as subsonic flows. We study the properties of dynamical and thermodynamical flow variables and examine how the nature of the accretion solutions alters due to the change of the model parameters, namely energy (ℰ), angular momentum (λ), a
k, and β. Further, we separate the parameter space in λ-ℰ plane according to the nature of the flow solutions, and study the modification of the parameter space by varying a
k and β. Moreover, we retrace the parameter space in a
k-β plane that allows accretion solutions containing multiple critical points. Finally, we calculate the disc luminosity (L) considering free-free emissions for transonic solutions as these solutions are astrophysically relevant and discuss the implication of this model formalism in the context of astrophysical applications.
A Hamiltonian, post-Born, three-dimensional, on-the-fly ray tracing algorithm for gravitational lensing
Authors: Zhou Alan Junzhe , Li Yin , Dodelson Scott , Mandelbaum Rachel , Zhang Yucheng , Li Xiangchong , Fabbian Giulio 
Published: October 2024

AbstractThe analyses of the next generation cosmological surveys demand an accurate, efficient, and differentiable method for simulating the universe and its observables across cosmological volumes. We present Hamiltonian ray tracing (HRT) — the first post-Born (accounting for lens-lens coupling and without relying on the Born approximation), three-dimensional (without assuming the thin-lens approximation), and on-the-fly (applicable to any structure formation simulations) ray tracing algorithm based on the Hamiltonian formalism. HRT performs symplectic integration of the photon geodesics in a weak gravitational field, and can integrate tightly with any gravity solver, enabling co-evolution of matter particles and light rays with minimal additional computations. We implement HRT in the particle-mesh library pmwd, leveraging hardware accelerators such as GPUs and automatic differentiation capabilities based on JAX. When tested on a point-mass lens, HRT achieves sub-percent accuracy in deflection angles above the resolution limit across both weak and moderately strong lensing regimes. We also test HRT in cosmological simulations on the convergence maps and their power spectra.