bluuebunny/crossref_metadata_2025_split huggingface dataset:
Scrutinizing job satisfaction during COVID-19 through Facebook
Authors: Liu Fung Ming Christy 
Published: April 2024

AbstractDue to the advent of social media, translators have started communicating about their work- and non-work-related experiences and associated attitudes on these platforms. COVID-19 accelerated a shift toward a greater reliance upon digital media (Tsao et al. 2021;Wong et al. 2021). This paper uses social media data to examine how Chinese translators and/ or interpreters used their Facebook pages as a channel to express their job dis/satisfaction between January 1, 2020 and December 31, 2022. Conclusions regarding practitioner job satisfaction are based on an analysis of information gathered concerning expressed attitudes on access to expanded networking opportunities, client appreciation, and the acquisition of new knowledge. Practitioners value their role as cultural mediators. COVID-19 introduced unprecedented changes, requiring practitioners to adapt to remote work settings and an increased reliance upon digital tools. Despite income and job security concerns due to the pandemic, practitioners remain committed to delivering quality work.
A covariant tapestry of linear GUP, metric-affine gravity, their Poincaré algebra and entropy bound
Authors: Farag Ali Ahmed , Wojnar Aneta 
Published: April 2024

Abstract
Motivated by the potential connection between metric-affine gravity and linear generalized uncertainty principle (GUP) in the phase space, we develop a covariant form of linear GUP and an associated modified Poincaré algebra, which exhibits distinctive behavior, nearing nullity at the minimal length scale proposed by linear GUP. We use three-torus geometry to visually represent linear GUP within a covariant framework. The three-torus area provides an exact geometric representation of Bekenstein’s universal bound. We depart from Bousso’s approach, which adapts Bekenstein’s bound by substituting the Schwarzschild radius (

r

s

) with the radius (R) of the smallest sphere enclosing the physical system, thereby basing the covariant entropy bound on the sphere’s area. Instead, our revised covariant entropy bound is described by the area of a three-torus, determined by both the inner radius

r

s

and outer radius R where

r

s

⩽
R

due to gravitational stability. This approach results in a more precise geometric representation of Bekenstein’s bound, notably for larger systems where Bousso’s bound is typically much larger than Bekensetin’s universal bound. Furthermore, we derive an equation that turns the standard uncertainty inequality into an equation when considering the contribution of the three-torus covariant entropy bound, suggesting a new avenue of quantum gravity.
Schwinger correlation of Dirac fields in accelerated frames
Authors: Zeng Hao-Sheng , Liu Heng , Wu Lian-Jie 
Published: April 2024

Abstract
We study the Schwinger correlation of Dirac fields in the noninertial frames under the influences of both constant and pulsed electric fields. We use both the entanglement negativity and quantum mutual information between particle and antiparticle as the indicator of the Schwinger correlation observed by the accelerated observers. We find that the Schwinger correlation in the inertial frames is the largest. With the increase of acceleration of the observers, the Schwinger correlation becomes smaller and smaller, but does not vanish in the limit of infinite acceleration. For the given acceleration, the Schwinger correlation is a nonmonotonic function of the electric field intensity, and there is an optimal value of electric field intensity for which the Schwinger correlation is the largest. In the case of pulsed electric fields, the Schwinger correlation is also the nonmonotonic function of pulsed width, which suggests the existence of optimal pulsed width for observing Schwinger correlation.
Influence of Be vacancy on 2D BeN4 single-layer for enhanced H2S sensing: prediction from first-principles simulations
Authors: Lakshmy Seetha , Banerjee Antara , Sanyal Gopal , Kalarikkal Nandakumar , Chakraborty Brahmananda 
Published: April 2024

Abstract
A notable surge in research interest directed towards the exploration and development of two-dimensional materials, specifically in the realm of advancing nano-devices, with a special focus on applications in gas detection, has been observed. Among these materials, the spotlight has fallen on a newly synthesized single-layered Dirac Semimetal, known as BeN4, which holds great promise as a potential candidate for an efficient gas sensor. The current investigation uses first-principles calculations to examine the H2S detection capability of pristine and point-defect-tempted BeN4 single-layers. The H2S molecule has been observed to be weakly adsorbed on pure BeN4 through weak van der Waals interaction exhibiting very low adsorption energy of −0.0726 eV and insignificant charge transport. The impact of the Be vacancy point defect in BeN4 was the surge in H2S adsorption energy to −0.582 eV, manifested by enhanced charge transmission (0.02 e) from the H2S molecule to the BeN4 with Be defects. The reasonable physical steadiness and modest recovery time (6 ms) at ambient conditions indicate the possibility of Be point-defected BeN4 being a contender as a sensor material for designing and developing a robust H2S gas sensor. In addition, the sensor exhibited a selective response towards the H2S gas molecules. Our findings will provide a reference line for the fabrication of innovative H2S detectors, showcasing the practical implications of the observed enhancements in H2S adsorption energy and charge transmission in Be point-defected BeN4 structures.
Influence of gate dielectric property on the capacitance dispersion in organic-metal-insulator-semiconductor capacitors
Authors: Imroze Fiheon , Chennamkulam Ajith Mithun , Manda Prashanth Kumar , Logesh Karunakaran , Dutta Soumya 
Published: April 2024

Abstract
The capacitance dispersion with frequency in an organic-metal–insulator-semiconductor capacitor (OMISCAP) is a vital phenomenon for predicting high-frequency applications. In this paper, the influence of the dielectric constant on the capacitance dispersion of OMISCAP is investigated by varying the dielectric constant of poly-4-vinyl-phenol using cross-linker concentration. The cut-off frequency of capacitance dispersion f

c

at which the capacitance drops by 10% of the plateau is introduced to measure the capacitance dispersion and the range of operating frequency. The variation of f

c

from 34 kHz to 50 kHz upon changing the dielectric constant of the insulator from 3.8 to 4.8 appears to be due to the combined effect of the capacitance variation in step with dielectric constant and the resistance variation due to field-induced charge accumulation in the semiconductor. The experimental results are validated using TCAD simulation and parameter extraction.
Topological phase transitions with zero indirect band gaps
Authors: Palumbo Giandomenico 
Published: April 2024

Abstract
Topological phase transitions in band models are usually associated to the gap closing between the highest valance band and the lowest conduction band, which can give rise to different types of nodal structures, such as Dirac/Weyl points, lines and surfaces. In this work, we show the existence of a different kind of topological phase transitions in one-dimensional systems, which are instead characterized by the presence of a robust zero indirect gap, which occurs when the top of the valence band coincides with the bottom of the conduction band in energy but not in momentum. More specifically, we consider an one-dimensional model on a trimer chain that is protected by both particle–hole and chiral-inversion symmetries. At the critical point, the system supports a Dirac-like point. After introducing a deforming parameter that breaks both inversion and chiral symmetries but preserves their combination, we observe the emergence of a zero indirect band gap, which results to be related to the persymmetry of our Hamiltonian. Importantly, the zero indirect gap holds for a range of values of the deforming parameter. We finally discuss the implementation of the deforming parameter in our tight-binding model through time-periodic (Floquet) driving.
Higher-order topological phases in crystalline and non-crystalline systems: a review
Authors: Yang Yan-Bin , Wang Jiong-Hao , Li Kai , Xu Yong 
Published: April 2024

Abstract
In recent years, higher-order topological phases have attracted great interest in various fields of physics. These phases have protected boundary states at lower-dimensional boundaries than the conventional first-order topological phases due to the higher-order bulk-boundary correspondence. In this review, we summarize current research progress on higher-order topological phases in both crystalline and non-crystalline systems. We firstly introduce prototypical models of higher-order topological phases in crystals and their topological characterizations. We then discuss effects of quenched disorder on higher-order topology and demonstrate disorder-induced higher-order topological insulators. We also review the theoretical studies on higher-order topological insulators in amorphous systems without any crystalline symmetry and higher-order topological phases in non-periodic lattices including quasicrystals, hyperbolic lattices, and fractals, which have no crystalline counterparts. We conclude the review by a summary of experimental realizations of higher-order topological phases and discussions on potential directions for future study.
Quantum enhanced efficiency and spectral performance of paper-based flexible photodetectors functionalized with two dimensional materials
Authors: Sharma Monika , Mazumder Nirmal , Ajayan Pulickel M , Deb Pritam 
Published: April 2024

Abstract
Flexible photodetectors (PDs) have exotic significance in recent years due to their enchanting potential in future optoelectronics. Moreover, paper-based fabricated PDs with outstanding flexibility unlock new avenues for future wearable electronics. Such PD has captured scientific interest for its efficient photoresponse properties due to the extraordinary assets like significant absorptive efficiency, surface morphology, material composition, affordability, bendability, and biodegradability. Quantum-confined materials harness the unique quantum-enhanced properties and hold immense promise for advancing both fundamental scientific understanding and practical implication. Two-dimensional (2D) materials as quantum materials have been one of the most extensively researched materials owing to their significant light absorption efficiency, increased carrier mobility, and tunable band gaps. In addition, 2D heterostructures can trap charge carriers at their interfaces, leading increase in photocurrent and photoconductivity. This review represents comprehensive discussion on recent developments in such PDs functionalized by 2D materials, highlighting charge transfer mechanism at their interface. This review thoroughly explains the mechanism behind the enhanced performance of quantum materials across a spectrum of figure of merits including external quantum efficiency, detectivity, spectral responsivity, optical gain, response time, and noise equivalent power. The present review studies the intricate mechanisms that reinforce these improvements, shedding light on the intricacies of quantum materials and their significant capabilities. Moreover, a detailed analysis of the technical applicability of paper-based PDs has been discussed with challenges and future trends, providing comprehensive insights into their practical usage in the field of future wearable and portable electronic technologies.
Understanding and optimizing the sensitization of anatase titanium dioxide surface with hematite clusters
Authors: Asikainen Kati , Alatalo Matti , Huttula Marko , Barbiellini B , Assa Aravindh S 
Published: April 2024

Abstract
The presence of hematite (Fe2O3) clusters at low coverage on titanium dioxide (TiO2) surface has been observed to enhance photocatalytic activity, while excess loading of hematite is detrimental. We conduct a comprehensive density functional theory study of Fe2O3 clusters adsorbed on the anatase TiO2 (101) surface to investigate the effect of Fe2O3 on TiO2. Our study shows that TiO2 exhibits improved photocatalytic properties with hematite clusters at low coverage, as evidenced by a systematic study conducted by increasing the number of cluster adsorbates. The adsorption of the clusters generates impurity states in the band gap improving light absorption and consequently affecting the charge transfer dynamics. Furthermore, the presence of hematite clusters enhances the activity of TiO2 in the hydrogen evolution reaction. The Fe valence mixing present in some clusters leads to a significant increase in H2 evolution rate compared with the fixed +3 valence of Fe in hematite. We also investigate the effect of oxygen defects and find extensive modifications in the electronic properties and local magnetism of the TiO2 -Fe2O3 system, demonstrating the wide-ranging effect of oxygen defects in the combined system.
Clutch model for focal adhesions predicts reduced self-stabilization under oblique pulling
Authors: Braeutigam Andrea , Burnet Anton F , Gompper Gerhard , Sabass Benedikt 
Published: April 2024

Abstract
Cell-matrix adhesions connect the cytoskeleton to the extracellular environment and are essential for maintaining the integrity of tissue and whole organisms. Remarkably, cell adhesions can adapt their size and composition to an applied force such that their size and strength increases proportionally to the load. Mathematical models for the clutch-like force transmission at adhesions are frequently based on the assumption that mechanical load is applied tangentially to the adhesion plane. Recently, we suggested a molecular mechanism that can explain adhesion growth under load for planar cell adhesions. The mechanism is based on conformation changes of adhesion molecules that are dynamically exchanged with a reservoir. Tangential loading drives the occupation of some states out of equilibrium, which for thermodynamic reasons, leads to the association of further molecules with the cluster, which we refer to as self-stabilization. Here, we generalize this model to forces that pull at an oblique angle to the plane supporting the cell, and examine if this idealized model also predicts self-stabilization. We also allow for a variable distance between the parallel planes representing cytoskeletal F-actin and transmembrane integrins. Simulation results demonstrate that the binding mechanism and the geometry of the cluster have a strong influence on the response of adhesion clusters to force. For oblique angles smaller than about 40∘, we observe a growth of the adhesion site under force. However this self-stabilization is reduced as the angle between the force and substrate plane increases, with vanishing self-stabilization for normal pulling. Overall, these results highlight the fundamental difference between the assumption of pulling and shearing forces in commonly used models of cell adhesion.
Pressure and temperature dependent ab-initio quasi-harmonic thermoelastic properties of tungsten
Authors: Gong Xuejun , Dal Corso Andrea 
Published: April 2024

Abstract
We present the ab-initio temperature and pressure dependent thermoelastic properties of body-centered cubic tungsten. The temperature dependent quasi-harmonic elastic constants (ECs) are computed at several reference volumes including both the phonon and the electronic excitations contribution to the free energy and interpolated at different temperatures and pressures. Good agreement with the experimental ECs on a single crystal at ambient pressure is found. The pressure and temperature dependence of the shear sound velocity measured on polycrystalline tungsten by Qi et al is also in agreement with theory. Some discrepancies are found instead for the compressional velocity at high temperature and this is attributed to the temperature derivative of the bulk modulus, higher in theory than in experiment. These conclusions are reached both by PBE and by PBEsol functionals. The two give elastic properties with a similar pressure and temperature dependence although the latter is closer to experiment at 0 K.
Laminar separation bubble analysis by means of single–shot lifetime temperature sensitive paint in a water towing tank
Authors: Venenciuc Tudor V , Klein Christian , Yarusevych Serhiy , Hain Rainer , Kähler Christian J 
Published: April 2024

Abstract
A laminar separation bubble is studied on an SD7003 foil in a water towing tank at a Reynolds number of

6
⋅

10
4

and an angle of attack of 6∘ by means of the temperature sensitive paint single-shot lifetime method in order to resolve the footprints and dynamics of vortical structures at low inflow turbulence levels. A heat flux is created by applying a carbon based heating layer on the suction side of the foil. The influence of the surface heating on the transition behaviour is analyzed using 2D2C-PIV and found to be negligible. The results demonstrate the capability of the single-shot lifetime method to quantify salient time-averaged flow characteristics, as well as to resolve and characterize the footprints of the dominant coherent structures.
Internal surface inspection method under linear structured light illumination based on dual non-coaxial optical paths
Authors: Zhang (张芷民) Zhimin , Li (李鹏阳) Pengyang , Huang (黄秋红) Qiuhong , Zhu (朱凌建) Lingjian 
Published: April 2024

Abstract
The inner space of tubular and hole-like workpieces, such as oil pipes and cylinders, is limited in volume and has no effective means of measuring the inner surface under geometric constraints.
This paper proposes a non-coaxial optical path line structured light method for inner surface inspection, which can significantly reduce the device size and working distance. The method constructs two non-coaxial optical paths for light source and imaging, and uses two fixed reflectors to achieve the deflection of the optical axes of the light source and imaging paths.
After theoretical derivation and verification, a sample device was designed and fabricated for experiments. The device measures approximately 22 mm by 24 mm in cross-section, the maximum insertion distance is about 200 mm, and the minimum inner diameter of the accessible space is 50 mm.
The results show that the optical path design does not destroy the original homography relationship, and can still ensure the measurement capability comparable to the existing methods when reducing the device size to 10% of the original. The method has obvious advantages when applied to the inspection of tubular and hole-like workpieces in fields such as petrochemical industry, military equipment, etc.
Improved ellipsoid fitting aided geomagnetic sensor calibration algorithm
Authors: Jiang Wei , Tan Xinglong 
Published: April 2024

Abstract
Aiming at the problems that the traditional single ellipsoid fitting fails to eliminate the errors of the geomagnetic sensor and does not consider the geomagnetic anomaly information, etc., this paper proposes a robust least squares combined with the Levenberg–Marquardt (LM-RLS) algorithm to fit an accurate ellipsoid to achieve accurate data calibration. According to the geomagnetic sensor error model, the total amount of geomagnetism is used as the constraint, the fitted ellipsoid coefficients of RLS are used as the initial values, and the LM algorithm is used to calculate the magnetic field dispersion points to the nearest point of the fitted ellipsoid surface. Then, the initial calibration value is solved by the criterion of the minimum weighted sum of squares of the closest point distance. Finally, the accurate ellipsoid is obtained to realize data calibration. The results of the dynamic experiment show that after the ellipsoid is precisely fitted by the LM-RLS algorithm, the sum of the absolute values of the distance from the magnetic field discrete data to the ellipsoid surface is reduced by 48.33% (RLS) and 43.10% (RWTLS). The relative errors of the magnetic field in the X, Y, and Z axes are reduced from 0.48%, 0.78%, 1.48% (RLS) and 0.30%, 0.58%, 1.14% (RWTLS) to 0.10%, 0.04% 0.16 %, respectively. The accuracy of geomagnetic calibration is improved by 68.06% (RLS) and 61.02% (RWTLS) in the dynamic experiment. The algorithm improves the accuracy of geomagnetic measurement, which provides a new idea for the calibration of three-axis geomagnetic sensors.
A portable terminal for acoustic monitoring and online recognition of bats with CNN-LSTM
Authors: Gao Wenzhuo , Liu Fanghao , Li Chengxuan , Shi Mengyao , Lin Aiqing , Dong Yongjun , Guo Jingfu 
Published: April 2024

Abstract
The acquisition and recognition of ultrasonic signals serves as pivotal mechanisms for the dynamic monitoring of bat species. In this study, we introduce a novel portable terminal for ultrasonic monitoring and online recognition of bats, leveraging an embedded platform in conjunction with the AudioMoth device. This research capitalizes on the distinctive differences observed in the echolocation signals’ typical characteristics across various bat species, alongside their spectrogram features. To this end, a sophisticated voiceprint recognition method was developed, combining the strengths of convolutional neural network with long short-term memory network. This method was subsequently integrated into the portable terminal. Furthermore, the Majority Vote Algorithm was employed to improve the recognition accuracy. Experimental results obtained from trials conducted within a controlled bat laboratory environment demonstrate the terminal’s capability for real-time collection and online recognition of bat ultrasonic signals. Remarkably, the system achieved a recognition accuracy of 99.18%, surpassing the performance metrics of four conventional deep learning models typically employed in similar contexts. This research not only provides a practical case for the acoustic monitoring and recognition of bat species but also holds the potential for broader application in wildlife diversity investigations.
Nonlinear frequency response function: experimental study on gearbox fault detection under step load
Authors: Tang Weili , Liu Deming , Li Xinxin , Mao Hanling , Huang Zhenfeng 
Published: April 2024

Abstract
For rotating machinery, excitation signals are difficult to measure, making it impossible to detect fatigue damage using nonlinear frequency response function. The purpose of this study is to propose a fatigue damage detection method for gearboxes under stepped load conditions based on normalized nonlinear output frequency response functions (NOFRFs). That is, using the vibration signals from the gearbox during the step loading to calculate the cross power spectrum, and therefrom estimating the normalized NOFRFs. This method is used to detect gearboxes containing prefabricated damaged gears or bearings. The research result shows that gear and bearing damage can lead to an increase in the index value of normalized NOFRFs. The different type of damage lead to the significant diversification of higher-order normalized NOFRFs, which further demonstrates that the method proposed in this article is not only effective in gearbox damage detection, but also has certain potential in fault classification. Then, experimental research for accumulated fatigue damage of gear was conducted. The results show that the normalized NOFRFs index is a better indicator of fatigue damage than the kurtosis index.