bluuebunny/crossref_metadata_2025_split huggingface dataset:
A systematic tomography framework for thickness mapping of pipes using helical guided waves
Authors: Qian Zhi , Li Peng , Qian Zhenghua , Wu Xianwei , Liu Dianzi , Kuznetsova Iren 
Published: October 2023

Abstract
Pipe wall loss caused by corrosion is of growing interest in the petrochemical industry. A systematic tomography framework using helical guided waves is developed in this paper to conduct a thickness mapping. In this work, the thickness under investigation is reconstructed using an objective function derived from the acoustic Helmholtz equation. The main approach consists of two parts. Firstly, the parametric dictionary is designed to separate the overlapped guided waves travelling in helical paths. After that, the scattering field can be extracted as the input of the distorted born iteration method. The imaging result is exemplified numerically and experimentally, with the strengths and drawbacks explained thoroughly. Remarkably, the thickness error of the simple defect is still within 0.5 mm when the input data is poor. A clear qualitative description of complex defects can be achieved through iterations even in the absence of an initial objective function. The framework established in this paper contributes a comprehensive imaging algorithm and the corresponding signal processing approach, all of which are conducive to providing some reference for engineering applications in nondestructive testing and structural health monitoring.
Tightly focused linearly and radially polarized beam effect on the LSPR peak with varying particle size
Authors: Sarita  , Jha Rajan , Singh Rakesh Kumar 
Published: October 2023

Abstract
Interactions of gold and silver spherical nanoparticles (NPs) of a wide range of radius size with tightly focused beams are investigated for a wide range of wavelengths. The scattering of tightly focused beams with a single NP of varying size is examined using a generalized Mie theory and average intensity enhancement in the near-field due to localized surface plasmons is examined for different tightly focused beams. A multipole expansion approach is used to observe the contribution of modes in shaping the scattered light intensity. Influence of particle size and tightly focused beam on intensity enhancement factor is investigated and a shift in localized surface plasmon resonance (LSPR) peak towards higher wavelength is observed with increasing particle size. Maximum intensity enhancement factor due to scattering of different incident beams by a metallic NP is theoretically examined and reported. Gold and silver NP having radius size ranging from 30–60 nm and 1–15 nm respectively showed a maximum intensity enhancement factor in different media. A significant enhancement for the tightly focused radially polarized beam is observed for gold and silver NPs of radius size between 50 nm and 100 nm. Variation towards higher wavelength in LSPR peak due to involvement of higher order of multipoles, and the surrounding medium are also examined in detail.
Thermodynamic properties of M− C
60 dimers immersed in an inert gas
Authors: Silva-Molina R Yesenia G , Castellanos-Moreno Arnulfo , Castellanos-Jaramillo Alejandro , Castellanos-Jaramillo Juan M 
Published: October 2023

Abstract
When fullerenes

C

60

capture an alkali metal

M
−
C

60

,

they acquire a powerful permanent dipole. This suggests that if the system is in an inert atmosphere, like Argon, they tend to form dimers

(
M
−
C

60

)

2

,

producing a gas whose thermodynamical properties can be studied. On this work, we focus on the degrees of freedom that appear when the dimer has formed. The fraction of

(
M
−
C

60

)

2

that can be created is calculated by using the standard physical statistics and can be graphed against the temperature on the 273.15 K and 373.15 K interval. The usual procedure to obtain the Keesom energy is revised to show that it can only be valid for weakly interacting dipoles or when the separation distance between them is considerable. To solve the problem we use the correction to the Keesom energy obtained by Battezzati and Magnasco in order to introduce it into the partition function for the new degree of freedom. The energy, the Helmholtz energy and the entropy is calculated through both means. The results were represented on graphs against the distance of separation between the

M
−
C

60

.

These results show that using the Keesom term alone is unsuitable when the separation distances are lower than 0.7 nm. Lastly, the calculations of the Helmholtz, Gibbs, and enthalpy as functions of temperature show that the dimer formation is both spontaneous and exothermic, as well as stable and an important fraction of the total amount of gas molecules in the system.
Nonlinear interaction of electromagnetic wave with electron acoustic wave in plasma
Authors: Dutta M , Goswami J , Kausik S S 
Published: October 2023

Abstract
An analysis on the nonlinear interaction of electromagnetic waves with electron acoustic waves is performed in plasma with two different temperature electron fluids in the presence of a neutralizing static ion background. A newly structured Zakharov’s equations are derived employing two fluid two-time scale theory. These coupled Zakharov’s equations describe the weakly nonlinear interaction of em wave perturbation with electron acoustic waves while propagating through plasma. In the low frequency or adiabatic limit, these Zakharov’s equations may be unified to produce a modified NLSE. A solution of the equation, novel in the literature, is derived following the method shown by Kudryashov. In a resonant regime, the modified NLSE reduces to NLSE. Though a stable solution exists for both cases, instability analysis shows caviton instability may arise. The threshold value of the electric field, at which instability sets in, is virtually zero for the resonant region whereas, apart from that region there is a threshold value of the electric field, determined by the frequency difference of em wave and electron plasma wave. Experimental observations support these results. This study is relevant for laser-plasma interaction and astrophysical and space plasma.
Capacitive self tension sensing properties of steel beam: electrode configuration and stress regime
Authors: Ozturk Murat 
Published: October 2023

Abstract
A structural material is called self-sensing when it is able to reveal its own state without the need for any external sensors. Self-sensing for steel is valuable for the control and safety of steel structures such as buildings and bridges. The changes in the capacitance of steel in response to cyclic tensile stresses applied in low, medium and high stress regimes are measured by using a Inductnce-Capacitance-Resistance (LCR) meter. Coplanar and parallel plate electrode configuration is used for capacitance measurements. Aluminum foil is used as electrode. A steel beam of 100 mm in length, 30 mm in width and 2.5 mm in thickness is tensioned by holding it at both ends to produce direct tensile stresses in the material. The maximum stresses applied for low, medium and high stress regimes are 6.7 MPa, 33.3 MPa and 66.7 MPa. The capacitance value of the sample with coplanar and parallel plate electrode configurations measured without applying load are 203.42 pF and 196.00 pf, respectively. The fractional changes in capacitance are 0.059%, 0.192% and 0.275% when 6.7 MPa, 33.3 MPa and 66.7 MPa direct tensile stress is created in the steel beam. These values are 0.12%, 0.20% and 0.29% for parallel plate electrode configuration. Test results demonstrates that there is a relation between stress and fractional change in capacitance. In other words, measuring fractional change in capacitance gives information about the stress variations in the material. From the experimental results, parallel plate electrode configuration is found to be more effective in tensile stress self-sensing. In addition, the relationship between stress and fractional change in capacitance is more linear for both electrode configurations in the low stress regime. This paper aims to reveal the tensile stresses occurring in steel by means of capacitance-based sensing. Sensing capability in larger scale structures and factors effecting sensing sensitivity are to be addressed in future work.
The DESI One-Percent survey: exploring the Halo Occupation Distribution of Emission Line Galaxies with AbacusSummit simulations
Authors: Rocher Antoine , Ruhlmann-Kleider Vanina , Burtin Etienne , Yuan Sihan , de Mattia Arnaud , Ross Ashley J. , Aguilar Jessica , Ahlen Steven , Alam Shadab , Bianchi Davide , Brooks David , Cole Shaun , Dawson Kyle , de la Macorra Axel , Doel Peter , Eisenstein Daniel J. , Fanning Kevin , Forero-Romero Jaime E. , Garrison Lehman H. , Gontcho A Gontcho Satya , Gonzalez-Perez Violeta , Guy Julien , Hadzhiyska Boryana , Hahn ChangHoon , Honscheid Klaus , Kisner Theodore , Landriau Martin , Lasker James , E. Levi Michael , Manera Marc , Meisner Aaron , Miquel Ramon , Moustakas John , Mueller Eva-Maria , Newman Jeffrey A. , Nie Jundan , Percival Will J. , Poppett Claire , Qin Fei , Rossi Graziano , Samushia Lado , Sanchez Eusebio , Schlegel David , Schubnell Michael , Seo Hee-Jong , Tarlé Gregory , Vargas-Magaña Mariana , Weaver Benjamin A. , Yu Jiaxi , Zhang Hanyu , Zheng Zheng , Zhou Zhimin , Zou Hu 
Published: October 2023

AbstractThe One-Percent survey of the Dark Energy Spectroscopic Instrument collected ∼ 270kemission line galaxies (ELGs) at 0.8 <z< 1.6. The high completeness of the sample allowed the clustering to be measured down to scales never probed before, 0.04 Mpc/hinrpfor the projected 2-point correlation function (2PCF) and 0.17 Mpc/hin galaxy pair separation s for the 2PCF monopole and quadrupole. The most striking feature of the measurements is a strong signal at the smallest scales, below 0.2 Mpc/hinrpand 1 Mpc/hins. We analyse these data in the halo occupation distribution framework. We consider different distributions for central galaxies, a standard power law for satellites with no condition on the presence of a central galaxy and explore several extensions of these models. For all considered models, the mean halo mass of the sample is found to be log10⟨Mh⟩ ∼ 11.9. We obtain a satellite mean occupation function which agrees with physically motivated ELG models only if we introduce central-satellite conformity, meaning that the satellite occupation is conditioned by the presence of central galaxies of the same type. To achieve in addition a good modelling of the clustering between 0.1 and 1 Mpc/hinrp, we allow for ELG positioning outside of the halo virial radius and find 0.5% of ELGs residing in the outskirts of halos. Furthermore, the satellite velocity dispersion inside halos is found to be ∼ 30% larger than that of the halo dark matter particles. These are the main findings of our work. We investigate assembly bias as a function of halo concentration, local density or local density anisotropies and observe no significant change in our results. We split the data sample in two redshift bins and report no significant evolution with redshift. Lastly, changing the cosmology in the modelling impacts only slightly our results.
Chirping compact stars: gravitational radiation and detection degeneracy with binaries
Authors: Rodríguez J.F. , Rueda J.A. , Ruffini R. , Zuluaga J.I. , Blanco-Iglesias J.M. , Lorén-Aguilar P. 
Published: October 2023

Abstract
Compressible, Riemann S-type ellipsoids can emit gravitational waves (GWs) with a chirp-like behavior (hereafter chirping ellipsoids, CELs). We show that the GW frequency-amplitude evolution of CELs (mass ∼ 1 M⊙, radius ∼ 103 km, polytropic equation of state with index n ≈ 3) is indistinguishable from that emitted by double white dwarfs and by extreme mass-ratio inspirals (EMRIs) composed of an intermediate-mass (e.g. 103 M⊙) black hole and a planet-like (e.g. 10-4 M⊙) companion, in the frequency interval within the detector sensitivity band in which the GW emission of these systems is quasi-monochromatic.
For reasonable astrophysical assumptions, the local universe density rate of CELs, double white dwarfs, and EMRIs in the mass range here considered are very similar, posing a detection-degeneracy challenge for space-based GW detectors. We outline the astrophysical implications of this CEL-binary detection degeneracy by space-based GW-detection facilities.
Chiral asteroseismology: seismic oscillations caused by chiral transport in neutron stars and supernovae
Authors: Hanai Sota , Yamamoto Naoki 
Published: October 2023

Abstract
We study the novel asteroseismology of the chiral magnetic wave (CMW) of the quark number density in relativistic quark matter inside neutron stars and core-collapse supernovae and the chiral vortical wave (CVW) of the neutrino number density in relativistic neutrino matter at the core of supernovae.
We call the oscillation modes for these chiral waves the chiral magnetic mode (CM-mode) and chiral vortical mode (CV-mode), respectively.
We derive the dispersion relations of these new modes in the presence of the chirality flipping due to the finite quark mass and diffusion. We then estimate the possible frequencies of these modes and amplitudes of the resulting gravitational waves. In particular, since the CM-mode can exist only in quark matter with nearly gapless quarks (such as the two-flavor color superconductivity) for a sufficiently strong magnetic field, corresponding gravitational waves provide a new possible probe for such quark matter and the magnetic field in neutron stars.
Fast and robust Bayesian inference using Gaussian processes with GPry
Authors: El Gammal Jonas , Schöneberg Nils , Torrado Jesús , Fidler Christian 
Published: October 2023

Abstract
We present the GPry algorithm for fast Bayesian inference of general (non-Gaussian) posteriors with a moderate number of parameters. GPry does not need any pre-training, special hardware such as GPUs, and is intended as a drop-in replacement for traditional Monte Carlo methods for Bayesian inference. Our algorithm is based on generating a Gaussian Process surrogate model of the log-posterior, aided by a Support Vector Machine classifier that excludes extreme or non-finite values. An active learning scheme allows us to reduce the number of required posterior evaluations by two orders of magnitude compared to traditional Monte Carlo inference. Our algorithm allows for parallel evaluations of the posterior at optimal locations, further reducing wall-clock times. We significantly improve performance using properties of the posterior in our active learning scheme and for the definition of the GP prior. In particular we account for the expected dynamical range of the posterior in different dimensionalities. We test our model against a number of synthetic and cosmological examples. GPry outperforms traditional Monte Carlo methods when the evaluation time of the likelihood (or the calculation of theoretical observables) is of the order of seconds; for evaluation times of over a minute it can perform inference in days that would take months using traditional methods. GPry is distributed as an open source Python package (pip install gpry) and can also be found at https://github.com/jonaselgammal/GPry.
Tuning stability enhancement of all-fiber acousto-optic tunable filter based on multi-piezoelectric transducer
Authors: Qiu Feng , Bai Yongzhong , Qu Dingrong , Shan Guangbin , Han Lei , Zhang Yanling 
Published: October 2023

Abstract
All-fiber acousto-optic tunable filters (AOTFs) have advantages of wide wavelength tuning range, fast tuning speed and low insertion loss. The resonance wavelength of the all-fiber AOTF can be tuned by adjusting the driving frequency of the piezoelectric transducer (PZT). In general, the driving voltage needs to be tuned in wide range in the wavelength tuning process, due to the existence of resonance frequency of the PZT. In this work, we propose and demonstrate a stability-enhanced all-fiber AOTF based on multi-PZT, which can reduce the dependence on the resonant frequency of a single PZT. In the experiment, the acousto-optic coupling efficiency can maintain larger than 80%, when the resonance wavelength of the AOTF is tuned from 1400 nm to 1600 nm, under the condition of a fixed driving voltage. The high tuning stability of the proposed multi-piezoelectric driving configuration can facilitate the practical applications of the all-fiber AOTF, such as the laser wavelength tuning, wavelength-division-multiplexing optical communication, fast optical spectroscopy, and so on.
Efficient two-dimensional Fraunhofer diffraction pattern via electron spin coherence
Authors: Meddour H , Askar Sh , Dehraj S , Al-dolaimy F , Abdullaeva B S , Alsaalamy A , Fenjan M N , Alawadi A , Kareem S H , Thabit D 
Published: October 2023

Abstract
In this letter, we have discussed the two-dimensional diffraction pattern via electron spin coherence in a GaAs quantum dot. Impulsive stimulated Raman excitation utilizing coherent optical fields is employed for the purpose of regulating the electron spin coherence within a charged ensemble of GaAs quantum dots, by means of an intermediate charged exciton (trion) state. We show that for the coupling two-dimensional standing wave (SW) field in the x and y directions, the two-dimensional Fraunhofer pattern can be formed for a weak probe light. By using the experimental parameters and controlling the Rabi frequency of the SW field and relative phase between applied lights, the symmetry and asymmetry diffraction pattern are obtained for the weak probe light due to the four-wave mixing mechanism. Our proposed model may have potential applications in high-capacity optical communications and quantum information technologies.
Low-power red laser and blue LED on circadian gene mRNA levels in human breast cancer cells
Authors: Ribeiro Rickson Souza , Rodrigues Juliana Alves , dos Santos Soares Márcia , Mencalha Andre Luiz , de Souza da Fonseca Adenilson 
Published: October 2023

Abstract
Low-power blue light-emitting diode (LED) and red laser have been used for therapeutic proposals based on photobiomodulation (PBM). This effect is trigged after absorption of radiation by photoacceptors, which lead to molecular, cellular and systemic responses. Cryptochromes are involved in circadian cycle control, and associated with development and progression of tumors. Despite such proteins are able to absorb violet-blue lights, there are few data on their participation in PBM. Thus, this work aims to evaluate the effects of radiations emitted by low-power blue LED (470 nm) and red laser (658 nm) on mRNA levels from cryptochromes genes as well as those from involved in their regulation in human breast cancer cells. The MCF-7 and MDA-MB-231 cells were exposed to low-power blue LED (470 nm, 640 J cm−2) and red laser (660 nm, 9 J cm−2), and relative mRNA levels from CRY1, CRY2, PER2, BMAL1 and CLOCK genes were evaluated by reverse transcription-quantitative polymerase chain reaction. The results suggested that exposure to low-power blue LED and red laser do not alter the mRNA levels from cryptochromes genes, and those involved in their regulation, in MCF-7 and MDA-MB-231 human breast cancer cells.
A novel radiometric calibration of an infrared thermometer
Authors: Yamada Yoshiro , Harris Subrena , Theocharous Evangelos , Hayes Michael 
Published: October 2023

Abstract
A new temperature calibration scheme was proposed and implemented on the National Physical Laboratory infrared radiometer Absolute Measurements of Blackbody Emitted Radiance (AMBER) operating in the wavelength range from 9 µm to 11 µm and equipped with a cryogenically cooled mercury cadmium telluride detector. The scheme involves measurements of the relative spectral responsivity of the filter radiometer including the spectral transmittance of the window and lens. It requires calibration at two reference temperatures, but does not involve measurement of the zero-radiance signal. The scheme uses a Ga-point blackbody as one reference point, and a variable temperature blackbody source at close to −30 °C with its temperature measured with a standard platinum resistance thermometer as the other. The measured temperature was compared using the variable temperature blackbody as the source against the temperature measured by the standard platinum resistance thermometer and agreement within the uncertainties was confirmed at intermediate temperatures. The scheme has the advantage that it makes full use of the small uncertainty realised by the fixed-point blackbody. The scheme was successfully implemented in an international comparison of sea surface temperature measuring radiometers where AMBER served to provide the reference.
Saturated cavity ringdown spectroscopy at Balmer-α line
of atomic hydrogen for estimating sheath electric field in plasma
Authors: Fushimi Kimika , Nishiyama Shusuke , Tomioka Satoshi , Sasaki Koichi 
Published: October 2023

Abstract
We applied saturated cavity ringdown spectroscopy (CRDS) to the measurement of the
Doppler-free absorption spectrum of the Balmer-α line of atomic hydrogen in an inductively
coupled hydrogen plasma. The spectrum was used for estimating the electric field in the sheath
region in the vicinity to a biased electrode. The absorption frequency (the absorption
coefficient multiplied by the speed of light) and the saturation parameter were estimated by
fitting the experimental ringdown curve with the theory reported by Giusfredi and coworkers
(Phys. Rev. Lett.
104 (2010) 110801). We detected the Lamb dip corresponding to the
2p
2
P
o
3/2 - 3d
2
D
5/2 transition in the absorption spectrum in the field-free
condition. We observed the change in the Lamb dip spectrum when we repeated the measurement in
the sheath, and we succeeded in estimating the sheath electric field of 220–230 V/cm at a distance
of 1.8 mm from the electrode which was biased at -100 V with respect to the ground potential. The
experimental results indicate the potential of saturated CRDS for the measurement of sheath
electric fields in plasmas.
A novel Hirota bilinear approach to N = 2 supersymmetric equations
Authors: Delisle Laurent 
Published: October 2023

Abstract
This article presents a novel application of the Hirota bilinear formalism to the N = 2 supersymmetric Korteweg–de Vries and Burgers equations. This new approach avoids splitting N = 2 equations into two N = 1 equations. We use the super Bell polynomials to obtain bilinear representations and present multi-soliton solutions.
Nonlinear Mori–Zwanzig theory and quadratic coarse-grained coordinates for complex molecular systems
Authors: Martzel Nicolas 
Published: October 2023

Abstract
We first introduce the Zwanzig–Kawasaki version of the generalized Langevin equation and show as a preamble and under some hypothesis about the relaxation of the fluctuations in the orthogonal subspace, that the commonly used term for the Markovian approximation of the dissipation is rigorously vanishing, necessitating the use of the next-order term, in an integral series we introduce. Independently, we provide thereafter a comprehensive description of complex coarse-grained molecules which, in addition to the classical positions and momenta of their centers of mass, encompasses their shapes, angular momenta and internal energies. The dynamics of these quantities is then derived as the coarse-grained forces, torques, microscopic stresses, energy transfers, from the coarse-grained potential built with their Berne-like anisotropic interactions. By incorporating exhaustively the quadratic combinations of the atomic degrees of freedom, this novel approach enriches considerably the dynamics at the coarse-grained level and could serve as a foundation for developing numerical models more holistic and accurate than dissipative particle dynamics for the simulation of complex molecular systems. This advancement opens up new possibilities for understanding and predicting the behavior of such systems in various scientific and engineering applications.