bluuebunny/crossref_metadata_2025_split huggingface dataset:
Evolution of quadrupole-octupole collectivity in the even–even 54 ≤ Z ≤ 58 nuclei
Authors: Minkov Nikolay 
Published: May 2024

Abstract
We explore the quadrupole-octupole collectivity in the mass region of even–even 54 ≤ Z ≤ 58 (Xe, Ba and Ce) nuclei by analysing the fine structure of energy spectra. As a basic criterion for the presence of reflection-asymmetric degree of freedom we consider the formation of alternating-parity level-sequences. As a clear-cut criterion for the emergence of pronounced octupole deformation we consider the reduction of the parity-shift at certain angular momentum and the formation of a single energy sequence which can be interpreted as an octupole band. Applying these criteria we select out alternating-parity bands (APBs) in the region of Xe, Ba and Ce isotopes for which a manifestation of pronounced octupole collectivity can be considered. Their fine structure is probed in a collective quadrupole-octupole rotation model (QORM) providing a detailed analysis in terms of odd–even staggering diagrams. The obtained model descriptions of the energy levels and staggering patterns reveal the most characteristic features of the quadrupole-octupole deformations in this mass region and outline a clearly determined area of manifestation of nuclear reflection-asymmetric shapes.
Synergistic influence of external electric field on laser ablation in liquid: correlating nanoparticle synthesis and cavitation bubble dynamics
Authors: Mehta Kavil , Ahuja Manushi , Kumar Prashant , Kushawaha Rajesh K , Baruah Prahlad K 
Published: May 2024

Abstract
The present study aims to investigate the changes in the properties of nanoparticles (NPs) and cavitation bubble dynamics by applying an external electric field during laser ablation in liquid (LAL). Investigating electric field assisted laser ablation in liquid (EFLAL) is crucial since phenomena such as plasma charging effect and electrostatic pressure have important role in determining the size, shape, and crystallinity. of the NPs. With this motivation, the present study has been conducted with different electric fields of 0, 100, 500 and 1000 V cm−1 to probe the effect of an external electric field on the dynamics of EFLAL. The charging effect observed on NPs during cavitation bubble dynamics was also investigated at these field intensities. The size of NPs witnesses a reduction from ∼30 nm without electric field to ∼19 nm in presence of electric field. Also, a significant narrowing of the size distribution by over 4 times was observed in the presence of electric field. This clearly demonstrates that EFLAL can be used to obtain NPs with uniform size distribution. Moreover, NPs of different shapes have also been observed by varying the electric field intensities (100 and 1000 V cm−1). The effect of the external electric field on the dynamics of the cavitation bubble produced during EFLAL has been probed using shadowgraphy technique. It has been observed that the bubble size increases with the presence of an electric field. The estimation of the bubble pressure in the presence of an electric field has revealed that the implosion bubble pressure is significantly lower than pressure in the absence of the field. The results obtained for NPs have been correlated to the changes in bubble parameters in this work.
Quasinormal modes by improved matrix method and weighted residual method
Authors: Lin Kai 
Published: May 2024

Abstract
This work discusses the Improved Matrix Method and Weighted Residual Method for studying the quasinormal modes (QNMs) of black holes. In the first method, by utilizing Jordan decomposition, the improved matrix method avoids the calculation of inverse matrices in the original matrix method. This significantly saves computational resources and time needed to compute the coefficient square matrices of the derivatives. In the second method, we illustrate the effectiveness of the weighted residual method in QNMs calculations by using the collocation method and Galerkin method as examples. We compared the results of both methods with the Generalized Horowitz-Hubeny Method and the WKB approximation. The methods proposed in this paper demonstrates superior precision. Additionally, we provide five criteria to exclude extraneous roots from the methods.
The heat dissipation by the multi-needle electrode structure ionic wind generator
Authors: Zhou Wenhao , Zhang Dongxuan , Liu Feng , Fang Zhi , Wan Hui 
Published: May 2024

Abstract
Ionic wind generated by atmospheric pressure discharge can be used for propulsion, heat dissipation, food drying, which shows the unique advantages of no mechanical parts and fast response. However, the wind speed and the energy efficiency of ionic wind generator are very low, which limit its application. In this paper, an ionic wind generator, constructed with needle-net electrode structure and powered by high-voltage positive dielectric current (DC) power supply, is built for cooling of a metal oxide semiconductor field effect transistor (MOSFET). The energy efficiency and wind speed of the ionic wind generator are optimized by adjusting the electrode structure and applied voltage amplitude. The results show that when the discharge spacing is fixed at 10 mm and the optimal needle spacing is 17.5 mm with 6 needles at 14 kV, the ionic wind velocity can reach a maximum value 3.20 m s−1 and the energy efficiency is 1.90%. Under optimal experimental conditions, the heat dissipation performance of MOSFET is significantly enhanced compared to using only a heat sink. With cooling by the ionic wind generator, the MOSFET junction temperature can be lowered by about 29 °C after 240 s operation.
Nonlocality via multiqubit orthogonal product bases
Authors: Chen Lin , Jiang Yutong 
Published: May 2024

Abstract
We investigate the quantum nonlocality via the discrimination on two, three and four-qubit orthogonal product bases (OPBs). We show that every two-qubit, and some three and four-qubit OPBs can be locally distinguished. It turns out that the remaining three and four-qubit OPBs cannot be locally distinguished, and thus they show the quantum nonlocality without entanglement. We also distinguish them by merging some systems using quantum teleportation with assisted Bell states.
A comparative analysis of 3D woven honeycomb-based aircrew helmet liners against Nomex and Aluminum alternatives
Authors: Singh Omender , Behera Bijoy Kumar , Thakur Nitin , Bahl Shashi 
Published: May 2024

Abstract
This study investigates the energy dissipation efficiency of an aircrew helmet liner developed using 3D woven honeycomb structural composites compared to different commercially available honeycomb liner materials such as Nomex, and Aluminium. In contrast to liners with discrete density differences, the use of a honeycomb-based liner reduces the concern about delamination, back face deformation and fracture propagation. The research involves comparing several parameters related to crashworthiness, such as specific energy absorption (SEA), crush force efficiency (CFE), and margin of safety, which are crucial for head protection and ensuring helmet injury tolerance. These parameters play a vital role in assessing the ability of different configurations of the honeycomb liner during impacts. Flatwise compression and dynamic impact tests were conducted to evaluate the helmet liner’s performance while maintaining consistency in the helmet shell component. Finite element analysis (FEA) and 3D x-ray Tomography techniques were utilized to analyse the back face deformation (BFD) at high-velocity impact and the internal damage resulting from impacts on the helmet liners, respectively. The results revealed that the 3D woven honeycomb liner configuration performs optimally in terms of energy absorption by demonstrating sufficient and balanced competency across these three critical factors. Additionally, the simulation result revealed that the 3D woven honeycomb liner exhibits wave propagation. This phenomenon enhances its energy absorption capacity and reduces back-face deformation attributed to its crushing behaviour. This research offers valuable insights for improving the performance of aircrew helmet liners, with a particular focus on utilizing 3D woven honeycomb liners featuring 3D woven solid structure to maintain exceptional structural integrity.
Inducing d
0 magnetism in new SrCl2 monolayer towards spintronic applications
Authors: On Vo Van , Ponce-Pérez R , Ha Chu Viet , Guerrero-Sanchez J , Hoat D M 
Published: May 2024

Abstract
Magnetism engineering in two-dimensional (2D) materials has been widely explored to make new spintronic materials. In this work, the doping (with alkali metals at Sr sublattice and with chalcogen atoms at Cl sublattice) method are proposed to induce significant d
0 magnetism in the non-magnetic SrCl2 monolayer. This 2D material is an indirect gap insulator with large band gap of 4.97(6.25) eV as obtained by PBE(HSE06) functional, exhibiting ionic character that is generated by the charge transfer from Sr atom to Cl atoms. The monolayer is significantly magnetized by doping with alkali metals, where a total magnetic moments between 0.90 and 1.00 μ

B
are obtained. Herein, Cl atoms closest to the doping site make main contribution to the system magnetism. Interestingly, the doped systems exhibit half-metallic behavior that is generated by semiconductor spin-up state and metallic spin-down state. On the other hand, the diluted magnetic semiconductor nature emerges in SrCl2 monolayer as a result of doping with chalcogen atoms. In these cases, total magnetic moment of 1.00 μ

B
is obtained, where magnetic properties are produced mainly by chalcogen impurities and Cl atoms below them. The electronic and magnetic properties of the doped systems are regulated mainly by the outermost p orbital of Cl and chalcogen atoms, and Sr-4d orbital that form mainly the conduction band. Upon further increasing the doping level of K and O atoms, the half-metallic or magnetic semiconductor natures are preserved. Results presented in this work may introduce new prospective 2D spintronic candidates for spintronic applications, which are derived from a non-magnetic SrCl2 monolayer via doping with d
0 atoms.
Computational study of lattice dynamics and mechanical properties of AlxIn1-xPySbzAs1-y-z/InP under the effect of composition
Authors: Alyami Mohammed , Alfrnwani O A , Othman Mazin Sh , Elkenany Elkenany B 
Published: May 2024

Abstract
For the first time, the composition dependence of pentanary AlInPSbAs alloy is described. The effect of composition on the polarity

(
∝

p

)
,

mechanical parameters have been calculated for the AlxIn1-xPySbzAs1-y-z alloy. The impact of composition on the internal strain parameter

(
ζ
)
,

bond-bending force constant (α), bond-stretching force constant (β), and sound velocity (v) has been reported. Results from experiments and the investigated properties of the new alloy show a high degree of agreement. In this work, the density function theory (DFT) and the empirical pseudo-potential approach (EPM) with the virtual crystal approximation (VCA) have been used. The outcomes are expected to be used in optoelectronic applications and in understanding the mechanical properties of AlxIn1-xPySbzAs1-y-z alloy.
Statistical analysis of the inverse power Zeghdoudi model: Estimation, simulation and modeling to engineering and environmental data
Authors: Elbatal Ibrahim , Hassan Amal S , Gemeay Ahmed M , Diab L S , Ben Ghorbal Anis , Elgarhy Mohammed 
Published: May 2024

Abstract
In this research, we investigate a brand-new two-parameter distribution as a modification of the power Zeghdoudi distribution (PZD). Using the inverse transformation technique on the PZD, the produced distribution is called the inverted PZD (IPZD). Its usefulness in producing symmetric and asymmetric probability density functions makes it the perfect choice for lifetime phenomenon modeling. It is also appropriate for a range of real data since the relevant hazard rate function has one of the following shapes: increasing, decreasing, reverse j-shape or upside-down shape. Mode, quantiles, moments, geometric mean, inverse moments, incomplete moments, distribution of order statistics, Lorenz, Bonferroni, and Zenga curves are a few of the significant characteristics and aspects explored in our study along with some graphical representations. Twelve effective estimating techniques are used to determine the distribution parameters of the IPZD. These include the Kolmogorov, least squares (LS), a maximum product of spacing, Anderson-Darling (AD), maximum likelihood, minimum absolute spacing distance, right-tail AD, minimum absolute spacing-log distance, weighted LS, left-tailed AD, Cramér-von Mises, AD left-tail second-order. A Monte Carlo simulation is used to examine the effectiveness of the obtained estimates. The visual representation and numerical results show that the maximum likelihood estimation strategy regularly beats the other methods in terms of accuracy when estimating the relevant parameters. The usefulness of the recommended distribution for modelling data is illustrated and displayed visually using two real data sets through comparisons with other distributions.
Hyperhydrodynamics: relativistic viscous fluids from hypermomentum
Authors: Iosifidis Damianos , Koivisto Tomi S. 
Published: May 2024

Abstract
We explore a new action formulation of hyperfluids, fluids with intrinsic hypermomentum. Brown's Lagrangian for a relativistic perfect fluid is generalised by incorporating the degrees of freedom encoded in the hypermomentum tensor, namely by including connection-matter couplings. Quite interestingly, generic hyperfluids are imperfect, since hypermomentum induces such effects as bulk and shear viscosities as well as heat fluxes. The various coefficients that appear in the first order expansion of hydrodynamics can now be deduced from a Lagrangian formulation, given a geometrical interpretation and a suggested microscopic description in terms of hypermomentum.
This connection between hypermomentum and dissipative fluids could shed new light on the physics of relativistic hydrodynamics.
The applicability of the new formalism is demonstrated by exact cosmological solutions.
The Sun and core-collapse supernovae are leading probes of the neutrino lifetime
Authors: Martínez-Miravé Pablo , Tamborra Irene , Tórtola Mariam 
Published: May 2024

Abstract
The large distances travelled by neutrinos emitted from the Sun and core-collapse supernovae together with the characteristic energy of such neutrinos provide ideal conditions to probe their lifetime, when the decay products evade detection. We investigate the prospects of probing invisible neutrino decay capitalising on the detection of solar and supernova neutrinos as well as the diffuse supernova neutrino background (DSNB) in the next-generation neutrino observatories Hyper-Kamiokande, DUNE, JUNO, DARWIN, and RES-NOVA.
We find that future solar neutrino data will be sensitive to values of the lifetime-to-mass ratio τ
1/m
1 and τ
2/m
2 of 𝒪(10-1–10-2) s/eV. From a core-collapse supernova explosion at 10 kpc, lifetime-to-mass ratios of the three mass eigenstates of 𝒪(105) s/eV could be tested. After 20 years of data taking, the DSNB would extend the sensitivity reach of τ
1/m
1 to 108 s/eV. These results promise an improvement of about 6–15 orders of magnitude on the values of the decay parameters with respect to existing limits.
Broken blue-tilted inflationary gravitational waves: a joint analysis of NANOGrav 15-year and BICEP/Keck 2018 data
Authors: Jiang Jun-Qian , Cai Yong , Ye Gen , Piao Yun-Song 
Published: May 2024

Abstract
Recently, the pulsar timing array (PTA) collaborations have
reported the evidence for a stochastic gravitational wave
background (SGWB) at nano-Hertz band. The spectrum of inflationary
gravitational wave (IGW) is unknown, which might exhibit different
power law at different frequency-bands, thus if the PTA signal is
primordial, it will be significant to explore the underlying
implications of current PTA and CMB data on IGW. In this Letter,
we perform a joint Markov Chain Monte Carlo analysis for a broken
power-law spectrum of IGW with the NANOGrav 15-year and BICEP/Keck
2018 data. It is found that though the bestfit spectral tilt of
IGW at PTA band is n
PTA
T = 2.42+0.32
-0.91,
at CMB band the bestfit is n
CMB
T
= 0.55+0.37
-0.10 while a detectable amplitude of r with
n
CMB
T ≃ 0 is still compatible. The
implication of our results for inflation is also discussed.
Analytical insights into constant-roll condition: extending the paradigm to non-canonical models
Authors: Mohammad Ahmadi S. , Ahmadi Nahid , Shokri Mehdi 
Published: May 2024

Abstract
In this work, we explore the prospect of generalizing the constant-roll condition in canonical inflationary model to non-canonical models. To find a natural generalization, we focus on three manifestations of this condition and construct constant-roll models corresponding to each manifestation. These models are not equivalent but reduce to the familiar constant-roll model in canonical limit. To showcase the applicability of our generalized mechanism, we examine a specific class of non-canonical models, which can be viewed as extensions of k/G inflation. In these models sound speed is constant. We conduct a comparative study, and with an analytical examination of the model, specify instances when our constant-roll conditions yield dissimilar outcomes and when they exhibit analogies. We also apply our findings to scrutinize another kinetically driven inflationary model with varying sound speed. We demonstrate that each of our constant-roll conditions leads to a unique set of solutions. Afterward, we construct a four-stage constant-roll kinetically driven inflation that complies with CMB constraints, it sustains for a sufficiently long period of time, and finally gracefully exits. In this model the spectrum of curvature perturbations is enhanced in a brief phase of non-slow-roll inflationary evolution. Employing numerical methods, we analyse this scenario to elucidate how altering the constant-roll condition impacts the power spectrum and the model's dynamics.
Shadow images of compact objects in beyond Horndeski theory
Authors: Huang Hyat , Kunz Jutta , Mitra Deeshani 
Published: May 2024

AbstractA beyond Horndeski theory is considered that admits wormholes, black holes and naked singularities. In this theory the shadow images of the black holes and the exotic compact objects (ECOs), illuminated by an optically and geometrically thin disk, are investigated. The results show that the three kinds of objects cast unlike shadow images, in particular, because the different objects possess a different number of light rings. The different boundaries of the accretion disk also affect the images. This may provide further insight into the nature of the shadow images of massive compact objects.
The quest for CMB signatures of conformal cyclic cosmology
Authors: Bodnia Eve , Isenbaev Vlad , Colburn Kellan , Swearngin Joe , Bouwmeester Dirk 
Published: May 2024

Abstract
Circles of low-variance and Hawking points in the Cosmic Microwave Background (CMB), resulting from black hole mergers and black hole evaporation, respectively, in a previous cycle of the universe, have been predicted as possible evidence for the Conformal Cyclic Cosmology model (CCC) introduced by R. Penrose. We present a high-resolution search for such low-variance circles in the Planck and WMAP CMB data, and introduce HawkingNet, our machine learning open-source software based on a ResNet18 algorithm, to search for Hawking points in the CMB.
We find that spots consisting of a few unusually bright (high-temperature) or dark (low-temperature) pixels, erroneously lead to regions with many low-variance circles, and consequently sets of near-concentric low-variance circles, when applying the search criteria used in previous work [1]. After removing those spots from the data, no statistically significant low-variance circles can be found.
Concerning Hawking points, also no statistically significant evidence is found when using a Gaussian temperature amplitude model over ∼ 1° opening angle and after accounting for spots of unusual brightness.
That the unusual spots in the data are themselves remnants of Hawking points is not supported by low-variance and/or low-temperature circles around them.
The absence of such statistically-significant distinct features in the currently available CMB data does not disprove the CCC model, but implies that higher resolution CMB data and/or refined CCC based predictions are needed to pursue the search for CCC signatures further.
Self-interacting vectorial dark matter in a SM-like dark sector
Authors: Tran Van Que , Nguyen Thong T.Q. , Yuan Tzu-Chiang 
Published: May 2024

Abstract
A dark SU(2)
D
× U(1)
D
gauge-Higgs sector, an exact copy of the Standard Model (SM) one, is proposed. It is demonstrated that the
dark gauge bosons 𝒲(p,m), in analogous to the SM W
±,
can fulfill the role as a self-interacting vector dark matter candidate, solving the core versus cusp and missing satellites problems faced by the conventional paradigm of collisionless weakly interacting massive particle. Constraints from collider, astroparticle and cosmology on such a self-interacting vector dark matter candidate are scrutinized. Implications for the future searches of
𝒲(p,m) in direct detection experiments are discussed.
The quantum corrected Schwarzschild black hole with a linear-quadratic GUP: a comprehensive evaluation
Authors: Barman Himangshu , Al-Badawi Ahmad , Jha Sohan Kumar , Rahaman Anisur 
Published: May 2024

Abstract
In this manuscript, we delve into an analytic and numerical probe of shadow with different accretion models, quasinormal modes, Hawking radiation, and gravitational lensing to study observational impacts of quantum effect introduced through linear-quadratic GUP(LQG). Our investigation reveals that the shadows of LQG-modified black holes are smaller and brighter than Schwarzschild black holes. To examine the impact of the quantum correction on the quasinormal mode, linear-quadratic GUP-modified black holes are explored under scalar and
electromagnetic field perturbation. Here, linear-quadratic GUP is
used to capture quantum corrections. It is observed that the
incorporation of quantum correction by linear-quadratic GUP alters
the singularity structure of the black hole. To compute the
quasinormal modes of this linear-quadratic GUP-inspired
quantum-corrected black holes, we compute the effective potential
generated under the perturbation of scalar and electromagnetic
field, and then we use the sixth-order WKB approach in conjunction
with the appropriate numerical analysis. We find that the greybody factor decreases with the GUP parameter α implying that the probability of transmission decreases with the GUP parameter. The total power emitted by LQG modified black hole is found to be greater than that emitted by Schwarzschild black hole. Finally, we study weak gravitational lensing and make a comparison with quadratic GUP and linear GUP-modified black holes.