bluuebunny/crossref_metadata_2025_split huggingface dataset:
Study on wave propagation in the modulation structure with gradually changing impedance according to specific waveform based on magneto-rheological fluid
Authors: Si Qianqian , Liu Shaogang , Wang Lei , Sun Zebang 
Published: November 2023

Abstract
This work proposes a novel hierarchical modulation structure with gradually-changed impedance built by magneto-rheological (MR) fluid and investigates its wave propagation characteristics theoretically and experimentally. Based on the impedance tunable property of the MR fluid, applying multiple magnetic fields to MR fluid realizes the modulation of this proposed structure, and regulating its magnetic field distribution law can effectively change the impedance variation forms in the structure. Establish the elastic wave propagation model of this modulated structure, and analyze the variation trends of its elastic wave propagation characteristics with different impedance distribution patterns, taking the vibration level difference as an indicator. Subsequently, conduct experimental testing for the transmissibility of elastic waves. The results show that the elastic wave transmission characteristics of the proposed modulation structure mainly depend on its impedance variation rate and the frequency of external excitation. On a broader band of the frequency range (20–300 Hz) studied in this paper, the gradual impedance distribution of MR fluid enhances the transmission loss of elastic waves compared to a uniform distribution of its impedance. Moreover, in the lower frequency range (40–125 Hz), the layered modulation structure with a non-monotonic variation of impedance following a wave-like waveform presents more significant attenuation on elastic waves than the structure whose impedance varies monotonously in a gradient waveform. This work contributes to expanding the design thoughts of the structure with gradually changing impedance and providing new ideas and means for the control of elastic waves.
Uq(sl3)
3j-symbols for tensor product of symmetric representations
Authors: Ahmed Ayaz , Ramadevi P , Akhtar Shoaib 
Published: November 2023

Abstract
We propose an algebraic procedure to obtain

U

q

(

sl

3

)

quantum 3j-symbols (quantum Clebsch–Gordan coefficients) appearing in the decomposition of tensor product of symmetric representations. In fact, these symbols will be useful to write the spectral parameter dependent R-matrix elements for any bi-partite vertex model whose edges carry states of the symmetric representations.
Planar weibull quantum circuit genetic algorithm with strong search ability and its implementation
Authors: Dong Ziming , Zeng Yi , Luo Jun , Wang Hao , He Jin , Hang Qijun , Chang Sheng 
Published: November 2023

Abstract
Genetic Algorithm (GA) is a widely used search method, and Quantum Genetic Algorithm (QGA) has been pointed out for several years. While common QGA only refers to the concept of quantum mechanics, and still uses mathematical representations of quantum states to simulate quantum entanglement and superposition, it can’t be realized on a quantum computer. This paper presents an implementable quantum circuit for a genetic algorithm, named as Planar-Weibull Quantum Circuit Genetic Algorithm (PW-QCGA), employing the Weibull function and excitation function through planar matrix coding. It is not only a self-adaptive algorithm that adjusts parameters dynamically, but it can also be executed on quantum computers by constructing parameterized quantum circuits. Experiments on three typical applications show that PW-QCGA not only has obvious advantages on convergence accuracy, search ability, convergence speed, and robustness, but also has higher fidelity on a quantum computer. We hope this work can bring inspiration to other quantum intelligent algorithms.
Large rotating magnetocaloric effects in polycrystalline Ni-Mn-Ga melt-spun ribbons
Authors: Chen Fenghua , Xie Haibo , Huo Mingshuai , Wu Hui , Li Lianjie , Jia Fanghui , Jiang Zhengyi 
Published: November 2023

Abstract
In this study, the different wheel speeds Ni53Mn23.5Ga23.5 alloy ribbons were prepared by melt-spun method. The morphology and crystal structure, martensitic phase transformation, magnetocrystalline anisotropy, in situ technique magnetization observation and the magnetic refrigeration capacity resulting were tested. The ratio of the length to width for the columnar crystals is approximately 2.5:1.0 in the sample created at a wheel speed of 12 m s−1, and it increases to 5:1 in the sample produced at a wheel speed of 18 m s−1. It is found that a sample with 18 m s−1 ha−1s−1 a large rotating magnetocaloric effect in polycrystalline alloys, with the results of 2 K with different directions. It can be designed as a working substance for rotary refrigeration machines that make full use of their anisotropic characteristics. The in situ atomic force microscope observation of the technological magnetisation has provided an important exploration for a better understanding of the magnetisation.
Thermoelastic damping and frequency shift of different micro-scale piezoelectro-magneto-thermoelastic beams
Authors: Guha Sayantan , Singh Abhishek Kumar , Singh Sonam 
Published: November 2023

Abstract
This work focuses on mathematically studying thermoelastic damping (TED) and frequency shift (FS) in micro-scale piezoelectro-magneto-thermoelastic (PEMT) composite beams composed of BaTiO3-CoFe2O4 combination. Pertaining to cutting-edge micro-technologies implemented in several engineering/scientific applications now-a-days, micro-scale doubly clamped (CC), doubly simply supported (SS), clamped-free (CF), and clamped-simply supported (CS) beams are extensively analyzed. The beams are modeled following the linear Euler-Bernoulli assumptions. The first two eigenvalues of all beams are numerically obtained using Newton-Raphson method. The closed-form expressions of TED and FS of all beams are derived analytically. The influences of Classical dynamical coupled (CL), Lord-Shulman (LS) & Green-Lindsay (GL) thermoelasticity theories, beam dimensions, BaTiO3 volume fraction (Ω
f
), and the first two modes (M
1 & M
2) on the TED & FS are meticulously analyzed. Critical thickness (CrTh), critical length (CrLt), and TED (inverse Quality factor) of the beams are numerically obtained and studied. Among other key outcomes, the existence of a critical value of Ω
f
is established in the range Ω
f
∈ [0.5, 0.55], at which, the TED and FS display a drastic change in their natures. The outcomes of the present analysis may find immense potential uses in the design and development of PEMT composite micro-beams, and their applications in several areas such as supporting/stiffening other micro/nanostructures, construction works, sensitive sensing applications, etc.
Progress in direct measurements of the Hubble constant
Authors: Freedman Wendy L. , Madore Barry F. 
Published: November 2023

Abstract
One of the most exciting and pressing issues in cosmology today is the discrepancy between some measurements of the local Hubble constant and other values of the expansion rate inferred from the observed temperature and polarization fluctuations in the cosmic microwave background (CMB) radiation. Resolving these differences holds the potential for the discovery of new physics beyond the standard model of cosmology: Lambda Cold Dark Matter (ΛCDM), a successful model that has been in place for more than 20 years. Given both the fundamental significance of this outstanding discrepancy, and the many-decades-long effort to increase the accuracy of the extragalactic distance scale, it is critical to demonstrate that the local measurements are convincingly free from residual systematic errors. We review the progress over the past quarter century in measurements of the local value of the Hubble constant, and discuss remaining challenges. Particularly exciting are new data from the James Webb Space Telescope (JWST), for which we present an overview of our program and first results. We focus in particular on Cepheids and the Tip of the Red Giant Branch (TRGB) stars, as well as a relatively new method, the JAGB (J-Region Asymptotic Giant Branch) method, all methods that currently exhibit the demonstrably smallest statistical and systematic uncertainties. JWST is delivering high-resolution near-infrared imaging data to both test for and to address directly several of the systematic uncertainties that have historically limited the accuracy of extragalactic distance scale measurements (e.g., the dimming effects of interstellar dust, chemical composition differences in the atmospheres of stars, and the crowding and blending of Cepheids contaminated by nearby previously unresolved stars). For the first galaxy in our program, NGC 7250, the high-resolution JWST images demonstrate that many of the Cepheids observed with the Hubble Space Telescope (HST) are significantly crowded by nearby neighbors. Avoiding the more significantly crowded variables, the scatter in the JWST near-infrared (NIR) Cepheid PL relation is decreased by a factor of two compared to those from HST, illustrating the power of JWST for improvements to local measurements of H
0. Ultimately, these data will either confirm the standard model, or provide robust evidence for the inclusion of additional new physics.
Jet modification in absence of QGP-medium: the role of multiparton interactions and color reconnection*
Authors: Das Prottoy , Modak Abhi , Banerjee Debjani , Biswas Rathijit , Das Supriya , Ghosh Sanjay K. , Raha Sibaji , Prasad Sidharth Kumar 
Published: November 2023

Abstract
Recent studies on high-multiplicity events in small collision systems (proton-proton and proton-lead) have drawn considerable research interest toward the possibility of the formation of partonic medium in such systems. One of the important consequences of the formation of dense partonic medium is the quenching of high-momentum final-state particles, resulting in several experimental observations such as suppression in nuclear modification factor

, modification of jet shape observable

and jet fragmentation (

) distributions, etc. In this work, we study

and

for inclusive charged-particle jets in proton-proton (pp) collisions at

= 13 TeV using the PYTHIA 8 Monash 2013 Monte Carlo simulation. We show that the color reconnection (CR) and multiparton interaction (MPI) mechanisms in PYTHIA 8 can lead to an increased rate of jet production. We also find that the mechanisms of MPI and CR and change in the gluonic contribution in high-multiplicity events result in significant modification of

and

compared to those in minimum bias events for 10

20 GeV/c. We notice a direct connection of

and gluonic contribution with the amount of modification in

: the larger the number of MPIs and/or gluonic contribution, the larger the amount of modification of

.
A Hierarchical Method for Locating the Interferometric Fringes of Celestial Sources in the Visibility Data
Authors: Ma Rong , Yan Ruiqing , Cui Hanshuai , Cheng Xiaochun , Li Jixia , Wu Fengquan , Yin Zongyao , Wang Hao , Zeng Wenyi , Yu Xianchuan 
Published: November 2023

Abstract
In source detection in the Tianlai project, locating the interferometric fringe in visibility data accurately will influence downstream tasks drastically, such as physical parameter estimation and weak source exploration. Considering that traditional locating methods are time-consuming and supervised methods require a great quantity of expensive labeled data, in this paper, we first investigate characteristics of interferometric fringes in the simulation and real scenario separately, and integrate an almost parameter-free unsupervised clustering method and seeding filling or eraser algorithm to propose a hierarchical plug and play method to improve location accuracy. Then, we apply our method to locate single and multiple sources’ interferometric fringes in simulation data. Next, we apply our method to real data taken from the Tianlai radio telescope array. Finally, we compare with unsupervised methods that are state of the art. These results show that our method has robustness in different scenarios and can improve location measurement accuracy effectively.
Low Surface Brightness Galaxies Selected by Different Model Fitting
Authors: Zhang Bing-Qing , Wu Hong , Du Wei , Zhao Pin-Song , He Min , Lei Feng-Jie 
Published: November 2023

Abstract
We present a study of low surface brightness galaxies (LSBGs) selected by fitting the images for all the galaxies in α.40 SDSS DR7 sample with two kinds of single-component models and two kinds of two-component models (disk+bulge): single exponential, single sérsic, exponential+deVaucular (exp+deV), and exponential+sérsic (exp+ser). Under the criteria of the B band disk central surface brightness

μ

0
,
disk

(
B
)
≥
22.5

mag

arcsec

−
2

and the axis ratio b/a > 0.3, we selected four none-edge-on LSBG samples from each of the models which contain 1105, 1038, 207, and 75 galaxies, respectively. There are 756 galaxies in common between LSBGs selected by exponential and sérsic models, corresponding to 68.42% of LSBGs selected by the exponential model and 72.83% of LSBGs selected by the sérsic model, the rest of the discrepancy is due to the difference in obtaining μ
0 between the exponential and sérsic models. Based on the fitting, in the range of 0.5 ≤ n ≤ 1.5, the relation of μ
0 from two models can be written as

μ

0
,
s

e

́

rsic

−

μ

0
,
exp

=
−
1.34
(
n
−
1
)

. The LSBGs selected by disk+bulge models (LSBG_2comps) are more massive than LSBGs selected by single-component models (LSBG_1comp), and also show a larger disk component. Though the bulges in the majority of our LSBG_2comps are not prominent, more than 60% of our LSBG_2comps will not be selected if we adopt a single-component model only. We also identified 31 giant low surface brightness galaxies (gLSBGs) from LSBG_2comps. They are located at the same region in the color–magnitude diagram as other gLSBGs. After we compared different criteria of gLSBGs selection, we find that for gas-rich LSBGs, M
⋆ > 1010
M
⊙ is the best to distinguish between gLSBGs and normal LSBGs with bulge.
Almost free of calibration for SSVEP-based brain-computer interfaces
Authors: Luo Ruixin , Xiao Xiaolin , Chen Enze , Meng Lin , Jung Tzyy-Ping , Xu Minpeng , Ming Dong 
Published: November 2023

Abstract

Objective. Steady-state visual evoked potential (SSVEP)-based brain-computer interface (BCI) is a promising technology that can achieve high information transfer rate (ITR) with supervised algorithms such as ensemble task-related component analysis (eTRCA) and task-discriminant component analysis (TDCA). However, training individual models requires a tedious and time-consuming calibration process, which hinders the real-life use of SSVEP-BCIs. A recent data augmentation method, called source aliasing matrix estimation (SAME), can generate new EEG samples from a few calibration trials. But SAME does not exploit the information across stimuli as well as only reduces the number of calibration trials per command, so it still has some limitations. Approach. This study proposes an extended version of SAME, called multi-stimulus SAME (msSAME), which exploits the similarity of the aliasing matrix across frequencies to enhance the performance of SSVEP-BCI with insufficient calibration trials. We also propose a semi-supervised approach based on msSAME that can further reduce the number of SSVEP frequencies needed for calibration. We evaluate our method on two public datasets, Benchmark and BETA, and an online experiment. Main results. The results show that msSAME outperforms SAME for both eTRCA and TDCA on the public datasets. Moreover, the semi-supervised msSAME-based method achieves comparable performance to the fully calibrated methods and outperforms the conventional free-calibrated methods. Remarkably, our method only needs 24 s to calibrate 40 targets in the online experiment and achieves an average ITR of 213.8 bits min−1 with a peak of 242.6 bits min−1. Significance. This study significantly reduces the calibration effort for individual SSVEP-BCIs, which is beneficial for developing practical plug-and-play SSVEP-BCIs.
Effect of Azo Dye on Electro-Optic and Optical Band Gap Characteristics in ZnO Nanoparticles Induced Vertically Aligned Liquid Crystal Cells
Authors: Jaggi Chinky , Kumar Pankaj , Malik Parul 
Published: November 2023

Abstract
Alignment of liquid crystal (LC) molecules in vertical direction is the most promising and interesting aspect for display devices in view of scientific and technological growth. Moreover, in accordance with the photovoltaic device applications, liquid crystals (LCs) show numerous applications. In the present work, the impact of dye as dopant with appropriate amount, over the electro-optic (E-O) and band gap properties as well as phase behaviour of vertically aligned liquid crystals (VALCs) has been studied and discussed. Initially, zinc oxide (ZnO) nanoparticles (NPs) were mixed to induce the vertical alignment (VA) in confined cell. Then, to prepare the dye doped LC sample, 0.125% of azo dye as dopant was uniformly mixed in the host sample. The results showed enhanced E-O characteristics with reduction in optical band gap as calculated using UV Visible study in 0.125% dye doped cell as compared to host sample cell.
Rheological and tribological behaviour of nanofluids: an experimental evaluation
Authors: Thapliyal Prashant , Kumar Ajay , Thakre G D 
Published: November 2023

Abstract
Commercially available synthetic engine oils of SAE grades 5W40 were taken as base fluids for preparing nano fluids by blending 0.1% and 0.2% concentration by weight of the functionalized Cu and MoS2 nanoparticles in them. The base fluids and their blends were characterized using standard ASTM and IS testing methods for their physicochemical and tribo performance behaviours. The rheological studies were performed on a Rheometer while the tribological investigations were performed on tribo-tester. The study reveal that a small improvement in anti- friction behaviour of about 6% and 4% reported for the 0.2 wt% of Cu and MoS2 nanoparticles respectively in the tested lubricants indicate that finished products have little scope to improve anti-friction properties under the influence of already present additives, however anti-wear properties showed significant enhancement up to 20% for 0.2% MoS2 and up to 15% for 0.2% nano-Cu indicating better anti-wear properties of MoS2 and Cu nanoparticle blends. Rheological studies reveal that blending of nanoparticles has marginal influence on the rheological behaviour of the lubricants. The lubricants show shear thinning behaviour at low shear rates. However at higher shear rates, lubricants behave as Newtonian fluids.
Role of heat treatment on nickel oxide nanoparticles: energy band gap and their effectiveness as antibacterial agents
Authors: Deotale A J , Singh U , Rattawa K , Shukla D , Gome A 
Published: November 2023

Abstract
This paper discusses the critical role of thermal effect on the crystalline size, phase and energy band gap of nickel oxide nanoparticles synthesized utilizing the ASH SUPPORTED technique. These nanoparticles were baked from 300°C to 900°C. The phase of nickel oxide nanoparticles with isochronal annealing has been identified through structural characterization utilising X-ray diffraction of each sample. It was observed that nickel oxide nanoparticles have an average crystallographic size of about 26.2 nm. The pure phase of nickel oxide nanoparticles was obtained at 900°C, which was also supported by Raman spectra. Vibrational characteristics demonstrate the increase in intensity with temperature due to the improvement in the grain size. UV-Visible spectroscopy determines the direct variation of the band gap in the region of 2.14 eV - 3.37eV with varying crystallite size due to alteration in annealing temperature or may be due to surface & interface effect. It also exhibits excellent antibacterial activity against enteropathogenic bacteria Salmonella Sp, which shows zone of inhibition diameter of 10mm.
Effects of Reduced Graphene Oxide on Structural, Morphological, and Contact Angle Measurements of Poly (Vinyl Alcohol)/Polyvinyl Pyrrolidone Nanofibers
Authors: Yadav Shweta , Lakshun Naidu K 
Published: November 2023

Abstract
Polymer blend nanofibers are attracting considerable attention due to their wide applications in energy storage, water purification, drug delivery, and wettability studies. To date, research on poly (vinyl alcohol)/polyvinyl pyrrolidone (PVA/PVP) embedded with graphene-related materials like graphene oxide or reduced graphene oxide(rGO) are synthesized from solution mixing and casting into film, with limited efforts on developing polymer blend nanofibrous films. The present study focuses on developing the PVA/PVP blend nanofibrous film embedded with rGO using the electrospinning technique. The X-ray Diffraction (XRD), Field Emission scanning electron microscopy (FESEM), and contact angle measurements are used to investigate the structural, morphological, and wettability of the synthesized nanofibrous film. The rGO is synthesized by the improved Hummer’s method. The study provides insights into the tuning of the contact angles by modifying the morphology of nanofibers. The as-synthesized nanofibers have a diameter of about 150-250 nm and with the increase in rGO weight percentage show a drastic change in contact angle from 64° to 35.2°. These results highlight the modification of the wettability properties of blend nanofiber films by embedding rGO.
Dielectric behaviour and dipole moment of binary mixtures containing certain amides in benzene
Authors: Bagade Sanjay H 
Published: November 2023

Abstract
Certain polar amides(v) are dissolved in benzene, a nonpolar solvent(u) to prepare binary mixtures with different composition of the amides like acetanilide, N-N-dimethyl acetamide, N-methyl acetamide, acetamide and formamide. Static relative permittivity ɛ0uv
, high frequency permittivity ɛ
∞uv
for different weight fraction of polar solute at 30°C are determined. The dielectric behaviour of binary mixtures are investigated under electric field of low frequency by using the Debye model for polar liquids. Static dipole moment µs
, dipole moment µv
from conductivity measurements and µ
t
from bond angle and bond moment measurements are computed. The dipole moments are consequence of attractive interaction between the adjacent molecules in binary mixture due to variation of electron densities. Hydrogen bonding, associated charge distribution among the constituent molecules, changes in bond angle values are some of the factors that give rise to dipole moment of binary mixtures. Nearly equal and close values of µs
, µv
and µt
proves the correctness of dielectric behaviour studies of amides- benzene binary mixtures.
Impedance Spectroscopy of Binary Mixtures of Dimethyl Silicone Fluid and Methyl Iso Butyl Ketone
Authors: Shah K N , Rana V A 
Published: November 2023

Abstract
A precision LCR metre was used to measure the parallel resistance (RP) and parallel capacitance (CP) of a capacitive cell filled with samples of binary mixes of methyl isobutyl ketone (MIBK) and dimethyl silicone fluid (DMSF), over the frequency range of 100 Hz to 2 MHz, at a temperature of 303.15 K. Using RP and CP, complex impedance Z*(ω) was computed. A four-element equivalent circuit model was used to fit the complex impedance data. The fitting provided the values of various circuit elements representing various electrical processes occurring in the capacitive measurement cell under the influence of an applied ac field. The Bode plot presentation of the complex impedance data confirmed the values of various circuit elements determined using the fitting process. Complex impedance formalism supports the observation of the electronic double-layer capacitance (EDLC) phenomena and ionic conduction relaxation phenomena.