bluuebunny/crossref_metadata_2025_split huggingface dataset:
Crystal growth and pressure effect on the transport properties in 122-type (La,Na,K)Fe2As2 superconductors
Authors: Zhang Chutong , Huang Song , Zhang Xiaoran , Xing Xiangzhuo , Yi Xiaolei , Liu Xiaobing 
Published: November 2024

Abstract
High-quality single crystals are essential for probing the intrinsic properties of unconventional superconductors. In this work, we report the successful growth of (La,Na,K)Fe2As2 single crystals, a novel 122-type iron-based superconductor, using the self-flux method. The crystal structure and chemical composition were characterized through x-ray diffraction and energy-dispersive x-ray spectroscopy. The (La,Na,K)Fe2As2 single crystals exhibit bulk superconductivity, with a critical transition temperature T
c of approximately 22 K. Magnetization measurements reveal a second peak effect and a critical current density J
c∼ 5 × 105 A cm−2 at 2 K in a self-field. The upper critical field anisotropy was systematically studied within the framework of the anisotropic Ginzburg–Landau theory, yielding an anisotropy value of approximately 2.6. Furthermore, we employ the diamond anvil cell technique to investigate the pressure effect on (La,Na,K)Fe2As2. Our results demonstrate that superconductivity is gradually suppressed with increasing pressure, while the normal state resistivity at low temperatures evolves from non-Fermi liquid to Fermi liquid behavior. This observation suggests that (La,Na,K)Fe2As2 may be situated on the right of the quantum critical point or, at the very least, within the over-doped region. These findings provide a critical sample platform and experimental insights for advancing the understanding of the physical properties of the newly discovered (La,Na,K)Fe2As2 superconductors.
Thermal quantum coherence: a comparative study of molybdenum disulfide versus graphene
Authors: El Houri Abdelghani , Khribach Aziz , Adnane Brahim , Moqine Younes , Houça Rachid , Kamal Abdellatif , Belouad Abdelhadi 
Published: November 2024

Abstract
This study examines quantum coherence in molybdenum disulfide MoS2 by considering thermal fluctuations and the spin–orbit coupling of molybdenum’s d orbitals. Our results reveal that at the ground state, the system exhibits significant coherence, particularly for high values of the wave vector k. Interestingly, this coherence improves with increasing temperature before asymptotically decreasing towards zero. In conclusion, we have shown that graphene generally outperforms molybdenum due to its perfect two-dimensional structure thanks to the high mobility of electrons in its conduction bands. Moreover, these findings enable predictions about the behavior of other materials with similar band structures based on their crystal lattice interactions.
Coincidence broadening doppler spectroscopy applied to elemental oxides
Authors: Domínguez-Reyes R , Rodríguez-López A 
Published: November 2024

Abstract
Coincidence Doppler Broadening Spectroscopy (CDBS) was employed to analyze ten simple oxides and compare them to their corresponding non-oxidized pure elements to identify the spectral signature attributable to oxygen. Despite variations among the oxidized elements, the resulting spectra exhibited consistent features—when referenced against the oxidized elements—that can be attributed to oxygen. Furthermore, CDBS spectra referenced against pure aluminum, a widely used independent standard, also revealed a prominent characteristic signal indicative of oxygen that can serve as a fingerprint for its presence. Comparisons with CDBS spectra of Group XVIa elements (Te, Se, and S) were also conducted to further validate the oxygen-related features. This methodology offers a valuable approach for discerning oxygen contributions in complex materials, even when the CDBS spectra are intricate and involve diverse compositions.
A class of stable nonlinear non-Hermitian skin modes
Authors: Ghaemi-Dizicheh Hamed 
Published: November 2024

Abstract
The non-Hermitian skin effect (NHSE) is a well-known phenomenon in open topological systems that causes a large number of eigenstates to become localized at the boundary. Although many aspects of its theory have been investigated in linear systems, this phenomenon remains novel in nonlinear models. In the first step of this paper, we look at the conditions for the presence of quasi-skin modes in a semi-infinite, one-dimensional, nonlinear, nonreciprocal lattice. In the following phase, we explore the survival time of the quasi-skin mode in a finite nonlinear lattice with open edges. We study the dependency of the survival time on the system’s parameters and demonstrate how the nonreciprocity of the system affects the survival time. This study introduces a method for achieving a stable localized state in a nonlinear finite lattice.
A hybrid approach of substitution and permutation techniques for modern image-cryptosystem
Authors: Ibrahim Mohammed , R Venkatesan , Ahmad Musheer 
Published: November 2024

Abstract
In this paper, we implemented an image encryption algorithm using a hybrid approach that combines substitution and permutation techniques. The hybrid approach starts by creating the initial S-Box from the irreducible polynomial over the Galois field, followed by the permutation operation to obtain the final S-Box; this is the first step of the encryption process. Subsequently, we conducted numerous analyses on the S-Box, examining its bijectivity, non-linearity, strict avalanche criteria, differential analysis, and fixed points to evaluate its performance. Our findings were commendable when compared to existing literature. Next, we utilized our unique chaotic map and cellular automata, which are both effective pseudo random number generators for cryptographic properties, in conjunction with S-Box to enhance the security and complexity of the encryption algorithm. Finally, we subject our encryption algorithm to various security analyses and compare its performance with existing literature. The results indicate that the proposed algorithm performs well in terms of security and complexity, and its low computational resource makes it suitable for real-time cryptographic applications. This contribution will be an added advantage in the development of image encryption standards.
An integral for self inductance of thin wires
Authors: Majic Matt 
Published: November 2024

Abstract
I propose an elegant method of calculating the self inductance of a thin wire of arbitrary shape. The inductance is broken to into two parts - the inductance of a straight wire of the same length and cross section, and the remainder, the ‘curve inductance’ due to the shape of the axial curve. The curve inductance is finite and can be calculated from a double integral by subtracting the straight wire singularity inside the integrand. Unlike all other methods, this does not involve a small parameter, and can be applied to any curve knowing its arc length parameterization. We use the circular arc and helix as examples and find that the integral is fast and accurate. The limits of the approximation are investigated for touching parallel wires.
On the two-dimensional harmonic oscillator with an electric field confined to a circular box
Authors: Fernández Francisco M , Garcia Javier , Aquino Norberto , Flores-Riveros Antonio 
Published: November 2024

Abstract
We revisit the quantum-mechanical two-dimensional harmonic oscillator with an electric field confined to a circular box of impenetrable walls. In order to obtain the energy spectrum we resort to the Rayleigh-Ritz method with polynomial and Gaussian basis sets. We compare present results with those derived recently by other authors. We discuss the limits of large and small box radius and also do some calculations with perturbation theory.
First-principles investigation of structural, electronic, optical, elastic, and thermoelectric properties of cubic francifluorite perovskites FrXF3 (X = Si, Ge, and Sn) for optoelectronic and thermoelectric applications
Authors: Benahmedi Lakhdar , Besbes Anissa , Djelti Radouan , Bendehiba Sidahmed , Aissani Ali 
Published: November 2024

Abstract
This study employs first-principles calculations based on Density Functional Theory (DFT), implemented in the Wien2k code, to investigate the structural, electronic, optical, elastic, and thermoelectric properties of FrXF3 (X = Si, Ge, Sn) compounds. Various exchange–correlation functionals, including GGA-PBE, GGA-PBEsol, GGA-WC, and TB-mBJ, were utilized to achieve a comprehensive analysis. The electronic structure calculations reveal that all compounds exhibit semiconducting behavior with direct band gaps (R→R), ranging from 1.75 eV to 2.68 eV using TB-mBJ. Optical properties analysis shows strong responses in the visible to ultraviolet range, highlighting their potential for optoelectronic applications. Thermoelectric evaluations, including thermal and electrical conductivity, Seebeck coefficient, power factor, and figure of merit, indicate that FrXF3 compounds possess significant thermoelectric potential, positioning them as promising candidates for thermoelectric applications.
Saturated absorption spectroscopy of 87Rb atoms using structured light: observation of narrow hyperfine and crossover resonances
Authors: Akhtar Samim , Das Aparajita , Saha Jayanta K , Hossain Md Mabud 
Published: November 2024

Abstract
An experiment on the saturated absorption spectroscopy (SAS) of 87Rb-D2 line is performed using the Laguerre–Gaussian (LG) beam as structured light. The theoretical simulation of which is done by considering a four-level atom-laser coupled system. The theoretically simulated spectra fairly match with the experimentally observed spectra. The line-width narrowing behavior of both the observed hyperfine and crossover resonances in the Doppler-broadened probe absorption spectra is attributed by the spatially dependent Rabi frequency of the pump LG beam irrespective of the characteristics of the probe beam. The results also illustrated that the narrowing behavior of the line shapes of the hyperfine structure using the LG beam is universal in nature, i.e. irrespective of hyperfine or crossover transitions. This structured light-induced narrowing of line-width of the sub-Doppler hyperfine and crossover resonances can be utilized for high-precision laser frequency locking at a particular hyperfine or crossover transition. Moreover, a significant narrowing of hyperfine and crossover resonances with the variation of the orbital angular momentum (OAM) number of the LG beam shows that the generated SAS signal can be manipulated by using the OAM of the structured light as a control knob.
Feedback projection synchronization of discrete chaotic systems and its application to speech encryption
Authors: Yang Ziheng , Wu Wenchu , Ding Qun 
Published: November 2024

Abstract
Chaotic systems are widely used in secure communication due to their sensitivity to initial values, unpredictability, and complex motion trajectories. In this paper, we study the encryption method of chaotic synchronization and introduce a scaling factor based on traditional feedback control synchronization to achieve more accurate projection synchronization. The effectiveness and robustness of the method in chaotic systems are verified through theoretical proofs and numerical simulations. A chaotic masked speech encryption system utilizing bit similarity is designed; the structural similarity index (SSIM) of the decrypted signal with the original signal is as high as 0.992866, while the SSIM value of the encrypted signal with the original signal is only 0.000030, proving the efficiency and security of the encryption process. Additionally, we analyzed the data transmission process of the encryption system. The fusion of the control signal and the encryption sequence into one transmission sequence in the channel not only saves hardware and software design resources but also reduces inter-channel interference and conflict, improving the reliability and stability of the transmission. Experimental results show that the system performs well in terms of data transmission security and anti-interference capability.
Neutrino oscillation in the presence of background classical sources
Authors: Mandal Susobhan 
Published: November 2024

Abstract
The presence of background classical sources affects quantum field theory significantly in different ways. Neutrino oscillation is a phenomenon that confirms that neutrinos are massive fermions in nature, a celebrated result in modern physics. Neutrino oscillation plays an important role in many astrophysical observations. However, the interactions between the background classical sources with neutrinos are not often considered. In the present article, we show the effect of some classical sources, namely matter currents, electromagnetic waves, torsion, and gravitational waves on neutrino oscillation. It is shown explicitly that the above sources can change the helicity state of neutrinos during neutrino oscillation.
Symplectic symmetry approach to clustering in atomic nuclei: the case of 24Mg
Authors: Ganev H G 
Published: November 2024

Abstract
Symplectic symmetry approach to clustering (SSAC) in atomic nuclei, recently proposed, is modified and further developed in more detail. It is firstly applied to the light two-cluster 20Ne + α system of 24Mg, the latter exhibiting well developed low-energy

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rotational bands in its spectrum. A simple algebraic Hamiltonian, consisting of dynamical symmetry, residual and vertical mixing parts is used to describe these three lowest rotational bands of positive and negative parity in 24Mg. A good description of the excitation energies is obtained by considering only the SU(3) cluster states restricted to the stretched many-particle Hilbert subspace, built on the leading Pauli allowed SU(3) multiplet for the positive- and negative-parity states, respectively. The coupling to the higher cluster-model configurations allows us to describe the known low-lying experimentally observed B(E2) transition probabilities within and between the cluster states of the three bands under consideration without the use of an effective charge.
Development of Gravity Theories in the View of TRAPPIST-1e
Authors: Wang Nan , Lu Lu-Yao , Liu Hui-Gen , Chen An-Dong , Lu Tiger , Cui Ao-Ran , Wang Jun-Kai 
Published: November 2024

Abstract
Contrary to the solar system, most exoplanet systems detected hitherto are close-in and compact. One typical system is TRAPPIST-1, which has seven nearly co-planar terrestrial planets all within the orbit of Mercury, including three in the habitable zone. To evaluate the differences in developing sophisticated gravity theories from the solar system, we use N-body integrations to simulate ephemeris and reproduce some important astronomy phenomena observed on the potentially habitable planet TRAPPIST-1e. Retrograde motions of other planets last 1–2 orders of magnitude shorter than in the solar system, but occur much more frequently. Transit events of all inner planets can be observed steadily. Except for Kepler's first law, which is hard to notice for low eccentricities of planets, the other two laws can then be precisely verified in 102 days, because the areas swept by planets vary by ≲0.01% and the observed semimajor axes and periods result in constants with theoretical and observation accuracies both ​​​​≲2%. However, the mean motion correlation implies that the Great Inequality is not always apparent between one pair of planets like Jupiter and Saturn. Furthermore, general relativity can hardly be discovered because it gives rise to perihelion precession of inner planets only ​​​​​​~​​​​​​0.1% of gravity precession, dozens of times smaller than Mercury. Our results support the possibility of developing part of gravity theories by potential exo-civilizations in compact systems like TRAPPIST-1.
Laboratory and beam-test performance study of a 55 µm pitch iLGAD sensor bonded to a Timepix3 readout chip
Authors: Svihra P. , Bates R. , Braach J. , Buschmann E. , Dannheim D. , Maneuski D. , Moffat N. , Otarid Y. 
Published: November 2024

Abstract
This contribution reports on characterisation results of a large-area (2 cm2) small pitch (55 µm) inverse Low-Gain Avalanche Detector (iLGAD), bonded to a Timepix3 readout chip. The ilGAD sensors were produced by Micron Semiconductor Ltd with the goal to obtain good gain uniformity and maximise the fill-factor — an issue present with standard small-pitch LGAD designs. We have conducted detailed performance evaluations using both X-ray calibrations and beam tests. An X-ray fluorescence setup has been used to obtain energy calibration and to identify the optimal operating settings of the new devices, whereas the extensive beam tests allowed for a detailed evaluation of the detector performance. The beam-tests were performed at the CERN SPS North Area H6 beamline, using a 120 GeV/c pion beam. The reference tracking and time-stamping is achieved by a Timepix3-based beam telescope setup.

The results show a gain of around 5 with very good uniformity, measured across the whole gain area, as well as a hit time resolution down to 1.3 ns without correcting for the time-walk effects. Furthermore, it is shown that the gain opens the possibility of a good X-ray energy resolution down to 4.5 keV.
Timepix3: single-pixel multi-hit energy-measurement behaviour
Authors: Bromberger Hubertus , Pennicard David , Ballabriga Rafael , Trippel Sebastian , Küpper Jochen 
Published: November 2024

Abstract
The event-driven hybrid-pixel detector readout chip, Timepix3, has the ability to simultaneously
measure the time of an event on the nanosecond timescale and the energy deposited in the sensor.
However, the behaviour of the system when two events are recorded in quick succession of each
other on the same pixel was not studied in detail previously. We present experimental
measurements, circuit simulations, and an empirical model for the impact of a preceding event on
this energy measurements, which can result in a loss as high as 70%. Accounting for this effect
enables more precise compensation, particularly for phenomena like timewalk. This results in
significant improvements in time resolution — in the best case, multiple tens of nanoseconds —
when two events happen in rapid succession.
First demonstration of a combined light and charge pixel readout on the anode plane of a LArTPC
Authors: Anfimov N. , Branca A. , Bürgi J. , Calivers L. , Cuesta C. , Diurba R. , Dunne P. , Dwyer D.A. , Evans J.J. , Ezeribe A.C. , Gauch A. , Gil-Botella I. , Greenberg S. , Guffanti D. , Karcher A. , Kreslo I. , Kunzmann J. , Lane N. , Manthey Corchado S. , McConkey N. , Navrer-Agasson A. , Parsa S. , Ruiz Ferreira G. , Russell B. , Selyunin A. , Söldner-Rembold S. , Szelc A.M. , Tapper A. , Terranova F. , Tognina C. , Stenico G.V. , Weber M. , Xiotidis I. ,   The SoLAr collaboration
Published: November 2024

Abstract
The novel SoLAr concept aims to extend sensitivities of
liquid-argon neutrino detectors down to the MeV scale for
next-generation detectors. SoLAr plans to accomplish this with a
liquid-argon time projection chamber that employs an anode plane
with dual charge and light readout, which enables precision matching
of light and charge signals for data acquisition and reconstruction
purposes. We present the results of a first demonstration of the
SoLAr detector concept with a small-scale prototype detector
integrating a pixel-based charge readout and silicon
photomultipliers on a shared printed circuit board. We discuss the
design of the prototype, and its operation and performance,
highlighting the capability of such a detector design.
160 kW beam commissioning for the Rapid Cycling Synchrotron of the China Spallation Neutron Source
Authors: Huang Ming-Yang , Liu Hanyang , Huang Liangsheng , Xu Shouyan , Lu Xiaohan , An Yuwen , Peng Jun , Li Zhiping , Li Yong , Chen Jianliang , Zhou Kai , Han Yanliang , Yuan Yaoshuo , Yuan Yue , Wang Sheng 
Published: November 2024

Abstract
For the China Spallation Neutron Source (CSNS), the rapid cycling synchrotron (RCS)
accumulates and accelerates the injection beam to the design energy of 1.6 GeV and then extracts
the high energy beam to the target. In this paper, the 160 kW beam power commissioning for
the CSNS RCS has been comprehensively studied, including: increase in the pulse width of
the injection beam to optimize the transverse painting, commissioning of the two dual
harmonic radio frequency (RF) cavities, optimization of the transverse and momentum collimators,
longitudinal dynamic optimization, beam instability suppression,
global closed orbit correction, local closed orbit correction, optimization of the RCS occasional
large beam loss, optimization of the extraction mode and extraction occasional large beam loss,
and so on.
In order to meet the requirements of beam power increase and stable operation of the accelerator,
the RCS beam losses from different sources are studied and optimized. With the aid of weekly
radiation dose measurement, the hot spots of the RCS are studied in depth to explore the causes.
Mesalamine loaded ethyl cellulose nanoparticles: optimization and in vivo evaluation of antioxidant potential in ulcerative colitis
Authors: Gautam Preety , Akhter Md Habban , Anand Anubhav , Rab Safia Obaidur , Jaremko Mariusz , Emwas Abdul-Hamid 
Published: November 2024

Abstract
This study aimed to optimize mesalamine (MES)-nanoparticles (NPs) using Box Behnken Design and investigate its in vivo antioxidant potential in colon drug targeting. The formulation was prepared using oil/water (O/W) emulsion solvent evaporation technique for time dependent colonic delivery. The optimal formulation with the following parameters composition was selected: polymer concentration (% w/w) (A) = 0.63, surfactant concentration (% w/w) (B) = 0.71, sonication duration (min) (C) = 6. The outcomes showed that ethyl cellulose (EC) NP containing MES has particles size of 142 ± 2.8 nm, zeta potential (ZP) of −24.8 ± 2.3 mV, % EE of 87.9 ± 1.6%, and PDI of 0.226 ± 0.15. Scanning electron microscopy revealed NPs has a uniform and spherical shape. The in-vitro release data disclosed that the EC NPs containing MES showed bursts release of 52% ± 1.6% in simulated stomach media within 2 h, followed by a steady release of 93% ± 2.9% in simulated intestinal fluid that lasted for 48 h. The MES release from NP best match with the Korsmeyer–Peppas model (R
2 = 0.962) and it followed Fickian diffusion case I release mechanism. The formulation stability over six-months at 25 °C ± 2 °C with 65% ± 5% relative humidity, and 40 °C ± 2 °C with 75% ± 5% relative humidity showed no significant changes in colour, EE, particle sizes and ZP. As per in vivo results, MES-NP effectively increased glutathione, SOD level and reduces the LPO level as compared to other treatment groups. The findings hold promise that the developed formulation can suitably give in ulcerative colitis.