bluuebunny/crossref_metadata_2025_split huggingface dataset:
Synergistic Organoboron/Palladium Catalysis for Regioselective N-Allylation of 2-Pyridones, 4-Pyridones, and Related Ambident Heterocycles
Authors: Taylor Mark S. , Yatzoglou Giorgos , Zambri Matthew T. , Desai Shrey P. 
Published: November 2023

AbstractThe use of a boronic acid co-catalyst along with a palladium complex enables efficient dehydrative couplings of allylic alcohols and tautomerizable heterocycles. The protocol has been applied to achieve N-allylations of 2-pyridones, 4-pyridones, 4-pyrimidinones, and their benzofused derivatives.
Association of Decreased Enhancement of Nasoseptal Flap on Postoperative Magnetic Resonance Imaging with the Risk of Complication
Authors: Wingrove Peter M. , Arani Keerthi N. , Snyderman Carl H. , Gardner Paul A. , Cabral David T. Fernandes , Zenonos Georgios A. , Wang Eric W. , Chabot Joseph , Fernandez-Miranda Juan C. , Chang Yue-Fang , Hughes Marion A. 
Published: November 2023

Abstract
Objectives Our objective was to determine if decreased contrast enhancement on postoperative magnetic resonance imaging (MRI) is associated with an increased risk of complication in patients who have undergone nasoseptal flap (NSF) reconstruction.
Design/Setting This was a single-institution retrospective study of patients who underwent a first-time endoscopic endonasal approach (EEA) with NSF reconstruction.
Participants Patients underwent an EEA to the skull base with NSF reconstruction and received postoperative MRI within 3 weeks of the operation.
Main Outcome Measures MR exams were scored on the degree of contrast enhancement at first postoperative MRI. An enhancement score of 4 indicated ≥75% enhancement of the NSF. A score of 3 indicated enhancement ≥50% and <75% enhancement of the NSF. A score of 2 indicated ≥25% and <50% enhancement of the NSF. Complications (e.g., cerebrospinal fluid [CSF] leak, meningitis, empyema, cerebritis, brain abscess, flap necrosis, and flap migration) were retrieved from our institution's skull base database. Logistic regression was used to determine the effect of the MRI enhancement score on the odds of developing a complication.
Results Out of 99 patients in the study, six had complications. Patients who underwent NSF reconstruction of skull base defects were found to have 19 times higher odds of complication (p = 0.007) if they had had an NSF enhancement score of 2 on their postoperative MRI when compared with patients with complete or near complete NSF enhancement (score 4).
Conclusion Quantifying NSF enhancement with an MRI may help surgeons better predict which of their patients are at an increased risk of complication.
Degradability of methylene orange synthetic dyes of multiferroic NiFe2O4–Ba0.8Sr0.2TiO3 composites
Authors: Lam Dao Son , Hieu Nguyen Minh , Dung Dang Duc , Linh Dinh Chi , Tung Nguyen Ngoc , Viet Chinh Nguyen Thi , Huong Ngo Thu , Thanh Tran Dang 
Published: November 2023

Five samples of xNiFe2O4/(1 − x)Ba0.8Sr0.2TiO3 (where x = 0, 0.1, 0.2, 0.3, and 0.4) multiferroic nanocomposites have been successfully fabricated using ball milling combined with heat treatment in a short time. X-ray diffraction patterns indicated the coexistence of two phases, namely, NiFe2O4 (NFO) and Ba0.8Sr0.2TiO3 (BSTO). The average grain size obtained is about 50–100 nm, and NFO and BSTO phases are evenly distributed in the samples. With an increase in the content of NFO, the values characterizing the ferroelectric and ferromagnetic properties improve significantly. Furthermore, the bandgap energy (Eg) value was also strongly reduced. The results on the degradability of methylene orange show that the apparent first-order rate of composites containing NFO with x = 0.4 was found to be k = 0.0228 min−1, which is significantly higher than that of pure BSTO (k = 0.0166 min−1), suggesting that NFO/BSTO multiferroic nanocomposites could be considered as candidate photocatalysts for the degradation of pollutants.
Elastic constants of equiatomic Fe–Ni Invar alloy single crystal
Authors: Singh Rahulkumar Sunil , Guruswamy Sivaraman 
Published: November 2023

In a disordered fcc structure, the equiatomic Fe–Ni alloy is of great interest as a soft magnetic Invar alloy with a near zero or low thermal expansion coefficient. In the L10 ordered phase, it is of interest as a potential high-performance permanent magnet alloy. In this work, the first detailed measurements of the elastic constants in a [001]-oriented Fe-50 at. % Ni alloy single crystal under a no magnetic field condition were made using the resonant ultrasound spectroscopy technique. The elastic constants measured allow one to understand the nature of atomic bonding in a material and the mechanical response to applied stress. The single crystal sample having a rectangular parallelepiped shape was prepared from a single crystal grown using the vertical Bridgman technique. The elastic constants C11, C12, and C44 were obtained from the resonant frequencies observed over a frequency range of 100–900 kHz. Using these C11, C12, and C44 values, Young’s modulus, shear modulus, bulk modulus, and Poisson’s ratio were calculated to be 99.1 GPa, 73.4 GPa, 176.7 GPa, and 0.20, respectively. The large anisotropy factor of 3.29 highlights the strong directional dependence of the material’s mechanical behavior.
Extended centroid position method in liquid-crystal-based interrogation system for electric-field-modulated Fabry-Perot sensing
Authors: Chakraborty Susanta , Sinha Aloka 
Published: November 2023

Abstract
A polarized low-coherence interferometer (PLCI) based on a liquid crystal (LC) wedge is designed, and an associated demodulation method encompassing the tunability feature is proposed for tunable, standalone optical sensing. The application of an electric field to the LC material effectively decreases the birefringence value and the related dispersion relation, which in turn enhances the resolution of detection. The effect of the electric field on the demodulation of the cavity length is addressed by the successive determinations of the centroid positions of the PLCI interferograms. Through a comprehensive study of numerical simulations, the effectiveness of the proposed approach is explored relative to the conventional envelope detection methodology. In order to verify this method, an experiment with a Fabry-Perot-based fiber optic displacement sensor is carried out using a 5CB LC wedge-based PLCI setup in the presence of an electric field. The measurement accuracy of the cavity length is found to be 0.74% of full scale, rendering it more precise and robust than the conventional envelope detection method.
Realization of the absorbed dose to water for 70 kV electronic brachytherapy sources for surface applications
Authors: Schneider T 
Published: November 2023

Abstract

Objective. The purpose of this work is to establish a primary standard for the absorbed dose to water for surface applications with 70 kV electronic brachytherapy sources and thereby to investigate several reference conditions with respect to applicability in metrology institutes, calibration labs and clinics. Approach. A primary standard for the absorbed dose to water for LDR-Seeds (ipFAC) was utilized. For this, the method of evaluation was modified to account for the different geometries in interstitial and surface brachytherapy and for the different energy distributions of the radiation fields, respectively. The correction factors required to determine the absorbed dose to water were evaluated using Monte Carlo (MC) simulations. MC-calculations were also used to estimate the uncertainties of this method. Main results. It could be shown that determining the absorbed dose to water in 1 cm depth below the surface of a water phantom D
w (1 cm) is feasible with the ipFAC. Thereby the method to determine D
w (1 cm) when the source is placed at 50 cm distance and the beam is collimated turns out to be more robust to variations in the directional emittance of the source than placing the source applicator assembly directly on the phantom. Significance. The first method features significantly lower uncertainties, 1.4% compared to 3.7% (both for k = 2), for the second one. However, a calibration based on a transfer chamber calibrated with the second method is more practical and easier to implement in clinical routine.
Resonant Y-Type solutions, N-Lump waves, and hybrid solutions to a Ma-type model: a study of lump wave trajectories in superposition
Authors: Madadi Majid , Asadi Esmaeel , Ghanbari Behzad 
Published: November 2023

Abstract
In this paper, we incorporate new constrained conditions into N-soliton solutions for a (2+1)-dimensional fourth-order nonlinear equation recently developed by Ma, resulting in the derivation of resonant Y-type solitons, lump waves, soliton lines and breather waves. We utilize the velocity-module resonance method to mix resonant waves with line waves and breather solutions. To investigate the interaction between higher-order lumps and resonant waves, soliton lines, and breather waves, we use the long wave limit method. We analyze the motion trajectory equations before and after the collision of lumps and other waves. To illustrate the physical behavior of these solutions, several figures are included. We also analyze the Painlevé integrability and explore the existence of multi-soliton solutions for the Ma equation in general. We demonstrate that our specific Ma-type equation is not Painlevé integrable; however, it does exhibit multi-soliton solutions.
Rational extensions of an oscillator-shaped quantum well potential in a position-dependent mass background
Authors: Quesne C 
Published: November 2023

Abstract
We show that a recently proposed oscillator-shaped quantum well model associated with a position-dependent mass can be solved by applying a point canonical transformation to the constant-mass Schrödinger equation for the Scarf I potential. On using the known rational extension of the latter connected with X
1-Jacobi exceptional orthogonal polynomials, we build a rationally-extended position-dependent mass model with the same spectrum as the starting one. Some more involved position-dependent mass models associated with X
2-Jacobi exceptional orthogonal polynomials are also considered.
Research on color image encryption approach based on chaotic Duffing map
Authors: Kanwal Shamsa , Inam Saba , Quddus Sabeen , Hajjej Fahima 
Published: November 2023

Abstract
In this study, we propose a novel image encryption approach that utilizes the chaotic dynamics of the Duffing map and Moore-penrose pseudo inverse to obscure images. Chaotic maps have been widely used in the field of image encryption due to their sensitive dependence on initial conditions, enabling them a suitable candidate for generating pseudo-random sequences that can be used for encryption tasks. The Duffing map, known for its complex nonlinear behavior, is highly preferred for developing robust and secure encryption schemes. The proposed approach aims to develop a balance between encryption efficiency and cryptographic security while maintaining a straightforward implementation. The analytical results and comparison of suggested approach with some existing approaches exhibit that it is a robust and secure method for real-time image encryption.
Classification of Painlevé type equations by the Mei symmetries and their exact solutions
Authors: Ur Rehman Haseeb , Feroze Tooba 
Published: November 2023

Abstract
There are fifty second-order ordinary differential equations of Painlevé type in the literature. This paper investigates the Mei symmetries corresponding to the Lagrangian of these equations. This classifies these equations by the admitted Mei symmetries, along with the Mei invariants and their respective gauge functions. The existence of Mei symmetries can be correlated with the autonomous and non-autonomous properties of ordinary differential equations of Painlevé type. Furthermore, using symmetries, exact solutions to certain Painlevé type equations are obtained.
Flaky N-doped hard carbon anode material for sodium-ion batteries
Authors: Zhang Kai-Yang , Fu Yan-Qiu , Liu Han-Hao , Yang Jia-Lin , Su Meng-Yuan , Wang Yinglin , Wu Xing-Long 
Published: November 2023

Abstract
Hard carbon (HC), as a promising anode material for sodium ion batteries, its sluggish diffusion performance hinders further improvement of electrochemical performance. In the preparation process of HC materials, the screening and treatment of precursors can optimize the structure and morphology of HC products, further affecting electrochemical performance. Here, we use peptone as the precursor of HC and prepare flaky N-doped HC (PFNC) through a one-step annealing method. Benefitting from this structure, the prepared PNFC delivers a specific capacity of 315.5 mAh g−1 at a current density of 20 mA g−1 with excellent rate performance and cyclic stability. This work proves that peptone is a valuable carbon precursor, opening a new avenue for further application and development of HC.
Magnon-magnon entanglement generation between two remote interaction-free optomagnonic systems via optical Bell-state measurement
Authors: Golkar S , Ghasemian E , Setodeh Kheirabady M , Tavassoly M K 
Published: November 2023

Abstract
Finding new strategies for the generation and preservation of quantum resources, e.g. entanglement between spatially separated macroscopic systems enables reliable and fertile platforms to study both fundamental quantum physics and fruitful applications such as quantum networks and distant quantum information processing. Here, we want to address how to generate magnon-magnon entanglement (MME) in an optomagnonic system based on the optical Bell-state measurement. To do so, we consider a hybrid optomagnonic system comprising of two identical, but distant dissipative microwave cavities, each containing a ferromagnetic YIG sphere and a superconducting qubit. Besides, each subsystem is driven via an external laser field. We numerically simulate the solution of the corresponding master equation and discuss the time-dependent as well as the steady state entanglement between the distant magnon modes at different interaction regime. Also, the fidelity of the generated entangled states is studied in detail. Generally, the dissipative environmental effects plague the MME, however, it is possible to generate a considerable amount of MME even at the steady state regime. Also, the results show that the robust MME may be enhanced by applying a relatively strong external pump decreasing the relative magnon damping rate as well as increasing the relative qubit-photon coupling strength, while some other parameters involved in the model, i.e. the atomic damping rate and detuning parameter do not considerably affect the amplitude (the maximum value) of MME. Exceptionally, although the magnon damping rate decreases the amount of MME, the entanglement stability takes place in a longer time interval in the strong magnonic damping regime. Moreover, the maximum of the steady state entanglement may be obtained in the moderate magnon-photon coupling regime provided that the system is driven by strong external pumps. Furthermore, the system can generate robust MME at steady state, especially in the small detuning regime. Our further investigations show that the system can provide relatively high-fidelity magnonic entangled states even in the presence of inevitable environmental effects. The proposed model offers an attractive platform for the generation of quantum resources to establish long-distance quantum networks based on magnonic and photonic systems.
Topological-edge-state spin transport in asymmetric three-terminal silicenelike nanodevice
Authors: Hu Zheng-Da , Lin Ze-Yu , Sun Yun-Lei , Ye En-Jia 
Published: November 2023

Abstract
We theoretically investigate the topological-edge-state spin transport in asymmetric three-terminal silicene-like nanodevice. Since silicene-like materials are honeycomb structures with considerable spin-orbit interaction (SOI), they possess both Dirac electron and topology insulator behaviors. In the three-terminal silicene-like nanodevice, the SOI realizes helical edge state and brings fully spin polarization selectively without external field. Firstly, we find that the spin degeneracy breaking gives rise to spin-polarized transport, i.e., up-spin electron and down-spin electron propagating to different leads from the top lead. The distribution of edge-state spin-dependent current in the real space indicates that an up-/down-spin channel to the left/right lead is opened at the interface of the present nanodevice. Secondly, the spin-polarized transport behavior has a competition with the effect of asymmetric transport, which prefers propagating the up- and down-electrons from top lead to the same (right) lead. Interestingly, as the geometric size variation is considered, the results show that the width increase of the horizontal armchair (top vertical zigzag) lead reinforces the spin-polarized (asymmetric) transport. However, when both the armchair and zigzag leads increase simultaneously, the spin-polarized transport becomes the dominant effect. Therefore, this edge-state spin-polarized transport behavior is topologically protected and very robust as the whole geometric size of the nanodevice increases. These properties of the topological-edge-state spin transport enable the asymmetric three-terminal silicene-like nanodevice a spin filter or a spin valve, and might contribute to the silicene-like nanocircuit engineering and spintronics application.
Pressure sensor based on two-dimensional photonic crystal ring resonator
Authors: Gupta Priyanka Kumari , Paltani Punya Prasanna , Tripathi Shrivishal 
Published: November 2023

Abstract
This paper proposes a novel pressure sensor utilizing a two-dimensional photonic crystal (2DPC) based on a ring resonator design. The sensor consists of a square ring resonator that is connected to two photonic crystal waveguides. The photonic crystal is comprised of a square lattice of circular Silicon dielectric rods with air serving as a background. The proposed sensor operates within a pressure range of 0 to 6 GPa, corresponding to a wavelength range of 1554 nm to 1569 nm. The band structures and transmission characteristics of the proposed sensor are studied using the plane wave expansion (PWE) and finite-difference time-domain (FDTD) methods. The normalized transmission spectra of the sensor are observed by varying parameters such as the refractive index, radius, lattice constant, and pressure value, resulting in corresponding wavelength shifts. The proposed sensor design offers a compact size, a wide dynamic range of 6 GPa pressure, and a high sensitivity of 3 nm/GPa. These properties make it highly suitable for a range of applications such as high-pressure or stress-sensing, medical applications, and long pipeline strain monitoring.
The ALMA-QUARKS Survey. I. Survey Description and Data Reduction
Authors: Liu 刘 Xunchuan 训川 , Liu Tie , Zhu Lei , Garay Guido , Liu Hong-Li , Goldsmith Paul , Evans Neal , Kim Kee-Tae , Liu Sheng-Yuan , Xu Fengwei , Lu Xing , Tej Anandmayee , Mai Xiaofeng , Bronfman Leonardo , Li Shanghuo , Mardones Diego , Stutz Amelia , Tatematsu Ken’ichi , Wang Ke , Zhang Qizhou , Qin Sheng-Li , Zhou Jianwen , Luo Qiuyi , Zhang Siju , Cheng Yu , He Jinhua , Gu Qilao , Li Ziyang , Zhang Zhenying , Zhang Suinan , Saha Anindya , Dewangan Lokesh , Sanhueza Patricio , Shen Zhiqiang 
Published: November 2023

Abstract
This paper presents an overview of the QUARKS survey, which stands for “Querying Underlying mechanisms of massive star formation with ALMA-Resolved gas Kinematics and Structures.” The QUARKS survey is observing 139 massive clumps covered by 156 pointings at Atacama Large Millimeter/submillimeter Array (ALMA) Band 6 (λ ∼ 1.3 mm). In conjunction with data obtained from the ALMA-ATOMS survey at Band 3 (λ ∼ 3 mm), QUARKS aims to carry out an unbiased statistical investigation of massive star formation process within protoclusters down to a scale of 1000 au. This overview paper describes the observations and data reduction of the QUARKS survey, and gives a first look at an exemplar source, the mini-starburst Sgr B2(M). The wide-bandwidth (7.5 GHz) and high-angular-resolution (∼0.″3) observations of the QUARKS survey allow for the resolution of much more compact cores than those could be done by the ATOMS survey, and to detect previously unrevealed fainter filamentary structures. The spectral windows cover transitions of species including CO, SO, N2D+, SiO, H30
α, H2CO, CH3CN, and many other complex organic molecules, tracing gas components with different temperatures and spatial extents. QUARKS aims to deepen our understanding of several scientific topics of massive star formation, such as the mass transport within protoclusters by (hub-)filamentary structures, the existence of massive starless cores, the physical and chemical properties of dense cores within protoclusters, and the feedback from already formed high-mass young protostars.
Calcium silicate biocomposites: effects of selenium oxide on the physico-mechanical features and their in-vitro biological assessments
Authors: S Sakthi @ Muthulakshmi , S Shailajha , B Shanmugapriya , K Chidhambara Priya Dharshini 
Published: November 2023

Abstract
Bone tissue regenerative material serves as a prospective recovery candidate with self-adaptable biological properties of bio-activation, degradability, compatibility, and antimicrobial efficacy instead of metallic implants. Such materials are highly expensive due to chemical reagents and complex synthesis procedures, making them unaffordable for patients with financial constraints. This research produced an efficient bone tissue regenerative material using inexpensive naturally occurring source materials, including silica sand and limestone. The extracted SiO2 and CaO particles (75:25 wt%) were subjected to hydrothermal synthesis (water treatment instead of chemical solvents) to produce the CaSiO3 biomaterial (code: S). Selenium oxide was doped with calcium silicate at 3, 5, and 10 wt.% to enhance its properties, yielding biocomposite materials (i.e. S3, S5, and S10). The physico-mechanical properties of these materials were investigated with x-ray diffraction, Fourier transform infrared, FESEM-EDS, and micro-universal testing machine. The results revealed that the synthesized biocomposites have a crystalline wollastonite phase with a porously fused rough surface. From structural parametric calculations, we found that the biocomposites have reduced particle size and enhanced surface area due to the influence of selenium oxide. The biocomposite S10, having high SeO2 content, attained the maximum compressive strength of 75.2 MPa. In-vitro studies of bioactivity, biodegradability, biocompatibility, and antibacterial activity were performed. At 7 and 14 d of bioactivity, the synthesized biocomposites are capable of dissolving their ions into simulated body fluid (SBF) solution to precipitate hydroxyapatite and a required Ca/P ratio of 1.69 was achieved by S3. A comparative analysis has been performed on the degradation activity in Tris-HCl and the consequent pH changes during SBF treatment. The bio-analysis revealed that the biocomposite S3 shows enhanced bioactivity through a controlled degradation rate and secured cell viability of 88% at a concentration of 100 μg ml−1. It also offers significant bacterial inhibition potency against E.coli and S.aureus bacteria.