bluuebunny/crossref_metadata_2025_split huggingface dataset:
Experimental and computational study of a multi-active-site Schiff base as corrosion inhibitor of mild steel in 1 M HCl
Authors: Li Xiaolong , Long Ting , Wu Qian , Lai Chuan , Li Yue , Li Junlan , Ren Boyan , Deng Keqian , Long Chaozheng , Zhao Shuting 
Published: January 2024

In this study, the corrosion inhibition behavior of N,N′-(1,4-phenylene)bis(1,1-di(pyridin-2-yl)methanimine) (PBDPM) on mild steel in 1 M HCl at 30°C was evaluated under steady conditions. The corrosion inhibitor was synthesized by a one-step method. Electrochemical, energy dispersion spectrum (EDS) and water contact angle results revealed the adsorption behavior of the inhibitor at the metal–solution interface. The adsorption of PBDPM obeys the Langmuir adsorption isotherm. It is obvious that PBDPM exhibits good inhibition performance presumably due to its high surface coverage, as it forms a dense protective film on the surface of mild steel. The adsorption configuration and structure–activity relationships of the inhibitor were also explored theoretically by density functional theory (DFT) and molecular dynamics (MD), and the thermodynamic parameters and molecular active sites (the values of electrophilic attack and nucleophilic attack) were calculated.
Proposal for composite quantum electromagnetically induced transparency heat engine coupled by a nanomechanical mirror
Authors: Laskar Rejjak 
Published: January 2024

Abstract
This paper introduces a quantum heat engine model that utilizes an ultracold atomic gas coupled with a nanomechanical mirror. The mirror’s vibration induces an opto-mechanical sideband in the control field, affecting the behavior of the cold gas and subsequently influencing the output radiation of the engine. The model incorporates mirror vibration while omitting cavity confinement, establishing a bridge between a multi-level atom–laser interacting system that plays with coherences and the mechanical vibration of the nanomechanical mirror, which jointly function as heat engines. Three distinct heat engine configurations are proposed: the first involves a vibration-free three-level Λ-type system, the second introduces nanomechanical vibration to the three-level Λ-type system, and the third constitutes a composite engine that combines the previous setups along with nanomechanical vibration. The spectral brightness of a three-level heat engine is diminished with mirror vibration, whereas for a composite heat engine, there is a slight enhancement in the brightness peak. However, the maximum brightness is attained when there is no vibration. Comparisons between the proposed model and an ideal system are made regarding entropy balance, adhering to the constraints of the second law of thermodynamics. The model observed that when subjected to mirror vibration, the proposed heat engines diverged from the characteristics expected in an ideal heat engine.
Development of novel superconductivity with higher

T

c

via the suppression of magnetism in quasi-two-dimensional electride

Y

2

C

under high pressures
Authors: Cui Zhiqiang , Luo Ying , Shi Lei , Chen Yue , Zhang Yunwei 
Published: January 2024

Abstract
Discovery of superconductivity in electride materials has been a topic of interest as their intrinsic electron-rich properties might suggest a considerable electron–phonon interaction. Layered

Y

2

C

is a ferromagnetic quasi-two-dimensional electride with polarized anionic electrons confined in the interlayer space. In this theoretical study, we report

Y

2

C

undergoes a series of structural phase transitions into two superconducting phases with estimated

T

c

of 9.2 and 21.0 K at 19 and 80 GPa, respectively, via the suppression of magnetism. Our extensive first-principles swarm structure searches identify that these two high-pressure superconducting phases possess an orthorhombic Pnma and a tetragonal I4/m structures, respectively, where the Pnma phase is found to be a one-dimensional electride characterized by electron confinements in channel spaces of the crystal lattice, while the electride property in I4/m phase has been completely destroyed. We attribute the development of an unprecedentedly high

T

c

superconductivity in Y-C system to the destructions of magnetism and the delocalization of interlayered anionic electrons under pressures. This work provides a unique example of pressure-induced collapse of magnetism at the onset of superconductivity in electride materials, along with the dramatic changes of electron-confinement topology in crystal lattices.
Gain reversal in the translocation dynamics of a semiflexible polymer through a flickering pore
Authors: Upadhyay Gokul , Kapri Rajeev , Chaudhuri Abhishek 
Published: January 2024

Abstract
We study the driven translocation of a semiflexible polymer through an attractive extended pore with a periodically oscillating width. Similar to its flexible counterpart, a stiff polymer translocates through an oscillating pore more quickly than a static pore whose width is equal to the oscillating pore’s mean width. This efficiency quantified as a gain in the translocation time, highlights a considerable dependence of the translocation dynamics on the stiffness of the polymer and the attractive nature of the pore. The gain characteristics for various polymer stiffness exhibit a trend reversal when the stickiness of the pore is changed. The gain reduces with increasing stiffness for a lower attractive strength of the pore, whereas it increases with increasing stiffness for higher attractive strengths. Such a dependence leads to the possibility of a high degree of robust selectivity in the translocation process.
A reduced-condition-number algorithm for single-frequency precise point positioning based on regularized Kalman filter
Authors: Li Linyang , Yang Kaichun , Jia Zhen 
Published: January 2024

Abstract
Single-frequency receivers are low cost and portable, thus being widely applied in engineering; the extended Kalman filter (EKF) is commonly used to perform single-frequency precise point positioning (SF-PPP). However, the positioning performance of SF-PPP is seriously influenced by various errors. Due to the large process noise and initial variance of the estimated parameters, the weight matrix of state parameters will be ill-conditioned, and since the noise of the pseudo-range is much higher than that of the carrier phase, the weight matrix of observations presents as ill-conditioned. Additionally, the condition number of the normal matrix will jump on the conditions of cycle slip, new emerging satellites, and signal outages. To reduce the condition number of the normal matrix, the regularized Kalman filter (RKF) algorithm is proposed, with additional support for the maximum variance matrix and singular value decomposition, thereby improving the accuracy and stability of SF-PPP. Through static and dynamic experiments, it is found that the proposed method can reduce both the ill-conditioning of the weight matrices of the observations and the state parameters. The condition number of the normal matrix is <500 per epoch, and the convergence time is shortened by >40%. Compared with the SF-PPP using EKF, centimeter-level static positioning accuracies of 1.13, 0.73, and 2.92 cm and decimeter-level kinematic positioning accuracies of 12.5, 10.8, and 27.3 cm in the east, north, and vertical components, respectively, using RKF; this yielded 38.3, 29.8, and 45.2% and 39.6, 41.9, and 21.3% improvement in the static and kinematic scenarios, respectively.
Measurement of six-degree-of-freedom geometric errors of a translation stage using three absolute position encoders
Authors: Kim Jong-Ahn , Lee Jae Yong , Kang Chu-Shik , Woo Jae Heun 
Published: January 2024

Abstract
This paper presents an effective method for evaluating the geometric errors of precision translation stages. It quantifies the six degrees of freedom (6-DOF) absolute posture of a moving platform on the stage, where a phase-encoded binary scale is fixed. This evaluation is accomplished using multi-axis readings obtained from three absolute position encoders. The scale errors are compensated using a reversal method, and distances between the measurement points are obtained without the need for additional calibration processes. Therefore, the proposed method can achieve both high accuracy and efficiency, even when implemented for on-site calibration. The performance of the prototype measurement system was evaluated by measuring the 6-DOF geometrics errors of a translation stage over a 100 mm range, and the measurement results showed agreement with the reference data within ±0.3 μm and ±1.2″.
Study of nanoindentation behavior of NiCrCoAl medium entropy alloys under indentation process using molecular dynamics
Authors: Ngo Thi-Thuy Binh , Nguyen Van-Thuc , Fang Te-Hua 
Published: January 2024

Abstract
The mechanical properties and deformation behavior of CoCrNiAl medium entropy alloy (MEA) subjected to indentation by an indenter tooltip on the substrate are explored using molecular dynamics (MD) simulation. The study investigates the effects of alloy compositions, temperature variations, and ultra vibration (UV) on parameters, such as total force, shear strain, shear stress, hardness, reduced modulus, substrate temperature, phase transformation, dislocation length, and elastic recovery. The findings indicate that higher alloy compositions result in increased total force, hardness, and reduced modulus, with Ni-rich compositions demonstrating superior mechanical strength. Conversely, increasing alloy compositions lead to reduced von Mises stress (VMS), phase transformation, dislocation distribution, and dislocation length due to the larger atomic size of Ni compared to other primary elements. At elevated substrate temperatures, atoms exhibit larger vibration amplitudes and interatomic separations, leading to weaker atomic bonding and decreased contact force, rendering the substrate softer at higher temperatures. Additionally, higher initial substrate temperatures enhance atom kinetic energy and thermal vibrations, leading to reduced material hardness and increased VMS levels. Increasing vibration frequency enlarges the indentation area on the substrate’s surface, concentrating shear strain and VMS with vibration frequency. Higher vibration amplitude and frequency amplify force, shear strain, VMS, substrate temperature, and dislocation distribution. Conversely, lower vibration amplitude and frequency result in a smaller average elastic recovery ratio. Moreover, increased amplitude and frequency values yield an amorphous-dominated indentation region and increased proportions of hexagonal close-packed and body-centered cubic structures. Furthermore, this study also takes into account the evaluation of a material’s ability to recover elastically during the indentation process, which is a fundamental material property.
Discontinuous to continuous transition changeover and magnetic helicity reversal in helimagnet nanodisks under torsion
Authors: Wan Xuejin , Zhong Anruo , Hu Yangfan , Lan Xiaoming , Wang Biao 
Published: January 2024

Abstract
A magnetic skyrmion is topologically protected because it possesses a non-zero topological charge. As a result, the creation or annihilation of a magnetic skyrmion is thought to be initiated by a sudden reversal of local magnetization, and thus cannot occur continuously. Here, we show that this viewpoint is only partially correct by studying the creation and annihilation of an isolated skyrmion in a nanodisk suffering coupled magnetic field and mechanical torsion. It was found that at a proper magnetic field, the torsion-induced chiral stress field can change the helicity of the magnetization structure and create or annihilate isolated skyrmion in a continuous way. In the torsion-magnetic-field phase diagram, there appears a critical point, where the type of the topological transition changes from a discontinuous to a continuous one. It was further proved that the critical condition for the continuous transition is the softness of magnetization at the center.
The complete set of eigenstates in one type of N-multiple quantum wells
Authors: Wang Bin-Hao , Mao Ning , Zhao Li-Chen 
Published: January 2024

Abstract
We provide a method to obtain a complete set of eigenstates analytically and the corresponding eigenvalues in one type of N-multiple well potentials. The quantum well profile can be adjusted by many different parameters, which could be applicable to many different physical situations. We demonstrate explicitly the series of eigenstates in double and triple well potentials, which can be used to describe Josephson oscillations and other tunneling dynamics conveniently. The analytic solutions can be used to discuss the topological vector potential hidden in the eigenstates of quantum wells, through performing our recently proposed method of extending Dirac’s monopole theory to a complex plane. Our results suggest that each node of eigenfunctions corresponds to the merging of a pair of magnetic monopoles with inverse charge. The underlying monopoles can be used to determine the phase jump of a pure real wave function with nodes, as observed from an experimental viewpoint.
Electronic, optical, and transport properties of boron arsenide monolayers tailored with hydrogenation and halogenation
Authors: Cai Shuo , Yu Heng , Wei Dong , Wei Yifei , Ma Yaqiang , Li Yi , Tang Yanan , Dai Xianqi 
Published: January 2024

Abstract
In this study, density functional theory was used to demonstrate the effectiveness of a strategy involving chemical functionalization, specifically hydrogenation and halogenation, to tailor the electronic, optical, and transport properties of boron arsenide (BAs) monolayer. Compared to the half-functionalized BAs monolayers, the fully functionalized BAs monolayers (X–BAs–X, X = H, F, Cl, Br, and I) showed excellent stability. Moreover, functionalization not only disrupted the planar structure of BAs monolayer but also broke its mirror symmetry, enabling effective modulation of its bandgap and work function within the ranges of 0.29 eV–4.25 eV and 3.96 eV–6.98 eV, respectively. In addition, functionalization significantly enhanced optical absorption in the infrared and ultraviolet regions and induced the notable negative differential resistance effect in transmission devices. Thus, functionalization offers a versatile means for modulating the electronic, optical, and transport properties of BAs monolayers, thereby expanding their potential applications in optoelectronic and microelectronic devices.
A Galaxy Image Augmentation Method Based on Few-shot Learning and Generative Adversarial Networks
Authors: Yao Yiqi , Zhang Jinqu , Du Ping , Dong Shuyu 
Published: January 2024

Abstract
Galaxy morphology classifications based on machine learning are a typical technique to handle enormous amounts of astronomical observation data, but the key challenge is how to provide enough training data for the machine learning models. Therefore this article proposes an image data augmentation method that combines few-shot learning and generative adversarial networks. The Galaxy10 DECaLs data set is selected for the experiments with consistency, variance, and augmentation effects being evaluated. Three popular networks, including AlexNet, VGG, and ResNet, are used as examples to study the effectiveness of different augmentation methods on galaxy morphology classifications. Experiment results show that the proposed method can generate galaxy images and can be used for expanding the classification model’s training set. According to comparative studies, the best enhancement effect on model performance is obtained by generating a data set that is 0.5–1 time larger than the original data set. Meanwhile, different augmentation strategies have considerably varied effects on different types of galaxies. FSL-GAN achieved the best classification performance on the ResNet network for In-between Round Smooth Galaxies and Unbarred Loose Spiral Galaxies, with F1 Scores of 89.54% and 63.18%, respectively. Experimental comparison reveals that various data augmentation techniques have varied effects on different categories of galaxy morphology and machine learning models. Finally, the best augmentation strategies for each galaxy category are suggested.
Design and development of a single-laser 2D Thomson scattering measurement system for TS-6 merging tokamak/magnetic reconnection experiments
Authors: Kamiya S. , Yamaguchi H. , Kim J. , Akimitsu M. , Himeno S. , Tanabe H. , Narihara K. , Ono Y. 
Published: January 2024

Abstract
Nd:YAG Thomson scattering diagnostics is reliable measurement of electron temperature and density, but its 2D extension conventionally needs as many polychromators as measuring points and as many lasers as measuring paths. To reduce the numbers and costs, we designed and developed a single-laser 2D measurement system by use of multiple reflection and time-of-flight of laser light. A single laser pulse reflects between mirrors on both sides of the vacuum vessel and makes seven round trips, which enables measurement at m × 7 points with only m polychromators and a single laser. Here, we present the design to satisfy the resolution required for TS-6 merging tokamak and magnetic reconnection experiments and the system development, especially the time-separation of scattered light signals from different points with time-of-flight delays. The measured Thomson scattering signals from 7 × 2 points and the measured Raman scattered signals from points in four laser paths indicate the feasibility of Thomson scattering measurement at m × 4 points.
Non-iterative generation of binary amplitude holograms applied to holographic projection with digital micromirror devices
Authors: Hoyos-Peláez César Antonio , Velez-Zea Alejandro , Barrera-Ramírez John Fredy 
Published: January 2024

Abstract
In this work, we implement a fast non-iterative method for the generation of binary amplitude Fresnel holograms and demonstrate their application in a holographic projection scheme based on a digital micromirror device. To achieve this, we perform the binarization of phase-only holograms generated using an optimized Fresnel random phase. We analyze the quality of the resulting binary amplitude holograms and compare them with holograms obtained with the conventional iterative Fresnel algorithm as a function of the number of iterations and the propagation distance. Additionally, we evaluate the diffraction efficiency in both methods. We demonstrate that the holograms produced with our method present significantly advantages in computation speed without a significant reduction in the reconstruction quality. Both experimental and numerical results confirm the effectiveness of our proposal.
Development and comparison of primary facilities for traceable BSSRDF measurements
Authors: Santafé-Gabarda Pablo , Gevaux Lou , Ferrero Alejandro , Fontanot Tommaso , Audenaert Jan , Meuret Youri , Obein Gaël , Campos Joaquín 
Published: January 2024

Abstract
The bidirectional scattering-surface reflectance distribution function (BSSRDF) describes the radiance originated by the volume scattering and the surface reflectance of any position on the surface of a sample, when it is directionally irradiated at any other position. The present state of the technology for appearance rendering requires a more detailed physical description of translucent objects by traceable measurements of the BSSRDF. This work presents two primary facilities developed for traceable BSSRDF measurements by different measuring approaches. Their results on the same translucent samples have been compared and the achieved BSSRDF scale has been transferred to a commercial measuring system. This study highlights the problems of the different measuring instrument designs and provides the scientific community with more knowledge on the measurement of the BSSRDF, which will be crucial for future works on material appearance.
Probing the surface electrical properties of clay minerals with electrostatic force microscopy and kelvin probe force microscopy
Authors: Qin Zonghua , Nie Xin , Yu Wenbin , Yang Shuguang , Zhou Zongke , Yang Shuqin , Wan Quan 
Published: January 2024

Abstract
Many surface processes of clay minerals require in-depth understanding of their surface electrical properties, such as surface charge density, surface potential distribution, etc In this paper, electrostatic force microscopy (EFM) and Kelvin probe force microscopy (KPFM) were used to study the surface charge densities, surface potentials, electric field intensities, and electric field force gradients of three common clay minerals: kaolinite, montmorillonite, and illite. The properties were directly imaged, and the average surface permanent charge densities of kaolinite, montmorillonite, and illite were obtained to be −0.0060, −2.136, and −5.456 μC m−2, respectively. In addition, a good linear relationship was found between the surface charge densities obtained by KPFM and the layer charges calculated from the mineral chemical formulas of three clay minerals.
Natural rubber based elastocaloric solid-state refrigeration device: design and performances of a single stage system
Authors: Sion Marianne , Jay Jacques , Coativy Gildas , Komiya Atsuki , Sebald Gaël 
Published: January 2024

Abstract
The elastocaloric effect denotes the ability of a material to release or absorb heat when the material is stretched and released respectively. This effect may be used to design an alternative cooling device. This work focuses on the development of a cooling device using natural rubber (NR) as the elastocaloric material. It consists of a solid–solid heat exchange between a cyclically stretched elastocaloric material and two exchangers, respectively put in contact with the elastocaloric material when it is stretched or released. An experimental device was designed and tested in order to assess the temperature span and cooling power (PC) achievable by NR based single stage device. The effect of the thickness of the NR is also discussed. It is shown that it was possible to transfer nearly 60% of the heat absorption potential of the NR from the cold heat exchanger. From the measurements, the highest PC was found to be 390 mW (430 W kg−1) for a 600 µm thick sample, and 305 mW (540 W kg−1) for a 400 µm thick sample. The temperature span was found to be similar for both materials, ranging 1.5 °C–1.9 °C.