bluuebunny/crossref_metadata_2025_split huggingface dataset:
Collective motion of pulsating active particles in confined structures
Authors: Liu Wan-hua , Zhu Wei-jing , Ai Bao-quan 
Published: January 2024

Abstract
The collective motion of pulsating active particles with periodic size contraction is investigated in a two-dimensional asymmetric channel. Our findings reveal that changes in particle size can act as a non-equilibrium driving force, disrupting the system’s thermodynamic equilibrium and leading to the transformation of self-contraction motion into directional motion in the asymmetric channel. The specific direction of motion is dictated by the symmetrical properties of the channel. Furthermore, our study identifies an optimal degree of channel opening (or self-pulsation frequency) at which the average velocity reaches its peak value. At lower frequencies, the average velocity demonstrates a peak function in relation to the self-pulsation amplitude (or particle number density). Conversely, at higher frequencies, the average velocity increases with the self-pulsation amplitude (or particle number density). The system exhibits three distinct states: the arrested ordered state, disordered state, and cycling ordered state. Notably, particle rectification reaches its optimum in the disordered state.
Comment on ‘Solving a singular integral equation for the one-dimensional Coulomb problem’ (2023 Physica Scripta
98 085219)
Authors: Zhang Yupeng , Zeng Qihao , Sun Dong , Olendski Oleg 
Published: January 2024

Abstract
It is shown by Olendski that the derivation of the momentum waveform of the quasi-one-dimensional hydrogen atom recently performed by Shutovskyi et al (2023 Phys. Scr.
98 085 219) contains the same error as in the previous effort by Saha et al (2017 Eur. J. Phys.
38 025 103). The error was also identified by Olendski (2017 Eur. J. Phys.
38 038 001; 2019 Eur. J. Phys.
40 025 402). To exemplify the faulty nature of Shutovski et al formula, the standard deviations of position and momentum that enter the Heisenberg uncertainty relation were calculated. It produced different results in the position and wave vector spaces, whereas the use of the correct expression yields the same value by either method.
Fusion and (non)-rigidity of Virasoro Kac modules in logarithmic minimal models at (p, q)-central charge
Authors: McRae Robert , Sopin Valerii 
Published: January 2024

AbstractLetOcbe the category of finite-length modules for the Virasoro Lie algebra at central chargecwhose composition factors are irreducible quotients of reducible Verma modules. For anyc∈C, this category admits the vertex algebraic braided tensor category structure of Huang–Lepowsky–Zhang. Here, we begin the detailed study ofOcp,qwherecp,q=1−6p−q2pqfor relatively prime integersp,q≥ 2; in conformal field theory,Ocp,qcorresponds to a logarithmic extension of the central chargecp,qVirasoro minimal model. We particularly focus on the Virasoro Kac modulesKr,s,r,s∈Z≥1, inOcp,qdefined by Morin-Duchesne–Rasmussen–Ridout, which are finitely-generated submodules of Feigin–Fuchs modules for the Virasoro algebra. We prove thatKr,sis rigid and self-dual when 1 ≤r≤pand 1 ≤s≤q, but that not allKr,sare rigid whenr>pors>q. That is,Ocp,qis not a rigid tensor category. We also show that all Kac modules and all simple modules inOcp,qare homomorphic images of repeated tensor products ofK1,2andK2,1, and we determine completely howK1,2andK2,1tensor with Kac modules and simple modules inOcp,q. In the process, we prove some fusion rule conjectures of Morin-Duchesne–Rasmussen–Ridout.
Performance and precision analysis of 3D surface modeling through UAVs: validation and comparison of different photogrammetric data processing software
Authors: Mora-Félix Zuriel D , Rangel-Peraza Jesús Gabriel , Monjardín-Armenta Sergio Alberto , Sanhouse-García Antonio J 
Published: January 2024

Abstract
The planimetric and altimetric accuracies of the Digital Elevation Model (DEM) obtained from Unmanned Aerial Vehicle (UAV) depend on some photogrammetric parameters such as flight height, flight speed, and/or ground sample distance. In the last few years, the study of computer vision algorithms has increased focusing on their importance on the photogrammetric reconstruction process for land surface mapping. According to this, the main goal of this paper was to evaluate the performance of different photogrammetric processing software, such as Open Drone Map (ODM), Agisoft PhotoScan, and Pix4D, on DEM accuracy. For this purpose, a DJI Phantom 4 Pro drone was used for the acquisition of 600 images in a difficult topography area (630 ha) with 27 Ground Control Points (GCP) previously established. The photogrammetric products were generated, and a statistical analysis was carried out for the comparison of the DEMs. The results of the Root Mean Square Error (RMSE) show that the planimetric and altimetric accuracy of Agisoft PhotoScan (RMSExy = 0.514 m; RMSEz = 0.162 m) is greater than those obtained using Pix4D and ODM. Unsatisfactory results were obtained with ODM since deformations and high planimetric and altimetric errors were identified in the orthomosaic and DEM, which was related to inefficient key point detection and an incomplete mosaic construction process. Agisoft PhotoScan modeled the anthropogenic objects as part of the land surface, while Pix4d smoothed the terrain, eliminating these anthropogenic objects and not considering them as part of the ground surface.
Theoretical prediction of proteins network-induced nonlocal response in molecules-resonator biosensor with hydrogen bonds including van der waals interactions
Authors: Bourouina Hicham , Boussendel Abdelmadjid 
Published: January 2024

Abstract
The present study investigates the adsorption-induced resonance frequency shift of a biomolecule-resonator system, considering the shear distortion effect, distributed adatoms, and small-scale effects using nonlocal elasticity theory. The adsorption-induced energy is modeled using a distributional approach for both the bio-receptor and spike protein. The dynamic behavior model for a microbeam resonator is derived, incorporating surface stress. The functional microbeam approach and the localized biomolecule approach are employed, along with van der Waals (vdW) interactions using the Lennard-Jones (6–12) potential to calculate the influence of all applied conditions. Explicit inertia moment and shear force are determined based on the nonlocal Timoshenko beam equations, with residual stress applied as an additive axial load. Numerical results demonstrate that the computed frequency shift depends on the active surface parameters, adsorbed adatoms, as well as the localized receptor and spike. The evaluation of results indicates that interatomic phenomena make the microsystem softer, emphasizing the importance of considering it in computations. Thus, the derived model is suitable for investigating the dynamic behavior of the biomolecule-resonator, applicable for determining both mass and density of spike and virus in the presence of adatom bonds.
Transmissive all-dielectric metasurfaces for reconstructing terahertz holographic images via polarization-multiplexing and polarization-decoupling
Authors: Zhong Zhaoyu , Zhang Ying , Jiang Jiuxing , Yao Yongtao , Yang Yuqiang , He Xunjun 
Published: January 2024

Abstract
Recently, the multifunctional terahertz metasurface holography (meta-holography) has garnered significant attention and sparked wide discussions due to its capacity for carrying a large amount of information. However, traditional multifunctional meta-holography, achieved by integrating metasurfaces with active materials or MEMS technology, have exhibited distinct shortcomings due to their intrinsic properties, such as slow response, complex structure, or low reliability. Herein, we propose a transmissive metasurface platform composed of anisotropic all-dielectric meta-atoms including three parts: the elliptical silicon pillars (Si-pillars), circular Si-pillars, and a quartz substrate sandwiched between them. This platform enables the implementation of dual-channel holographic images by utilizing linear polarization (LP) multiplexing and circular polarization (CP) decoupling. As proof of concept, two transmissive anisotropic metasurfaces (MS-1 and MS-2) are designed and created. When illuminated with two orthogonal LP-polarization waves, the MS-1 can produce holographic images of the letters ‘X’ and ‘Y’ in the corresponding co-polarized channel. Additionally, the MS-2 is illuminated by the left-circularly polarized (LCP) wave, two holographic images with different patterns (‘L’ and ‘R’) are reconstructed in the co-polarized and cross-polarized channels respectively. Therefore, the proposed metasurfaces allowing for polarization-multiplexing or polarization-decoupling can exhibit considerable potential for applications in multifunctional integration and high information capacity.
Effect of cobalt addition on thermal cycling behaviour of Ti50Ni(50−x)cox shape memory alloys
Authors: Swaminathan G , Sampath V , Santosh S 
Published: January 2024

Abstract
The effect of adding Co on the temperature cycling behaviour of ternary Ti50Ni(50−x)Cox (x = 1, 2, 3) alloys was experimentally studied in this work. The alloys were prepared using a vacuum induction furnace, followed by subjecting them to homogenization, hot-rolling and annealing processes. The alloys were subjected to thermal cycling experiments in a nitrogen atmosphere by differential scanning calorimetry under stress-free conditions between their transformation temperatures. The results indicate that adding Co to NiTi alloys decreases their transition temperatures, improves the thermal cycling stability apart from suppressing the R-phase formation on cooling during cycling. The changes are due to the addition of Co introducing solid solution strengthening and generation of dislocations during cyclic phase transformations, as confirmed by the hardness test results and TEM micrographs, respectively.
One pot synthesizing of cobalt (III) and (IV) oxides/polypyrrole nanocomposite for light sensing in wide optical range
Authors: Rabia Mohamed , Ben Gouider Trabelsi Amira , Alkallas Fatemah H , Elsayed Asmaa M 
Published: January 2024

Abstract
A highly porous potato-shaped nanocomposite, Co(111) and Co(IV) oxide/polypyrrole (Co2O3-Co3O4/Ppy), is synthesized employing a one-pot procedure involving the slow oxidation of pyrrole using Co(NO3)2. The exceptional physical characteristics of this nanocomposite are accompanied by impressive optical properties, marked by a bandgap of 1.72 eV. Its absorbance spans across the UV, visible (Vis), and infrared (IR) regions, making it a promising candidate for optoelectronic applications such as photodetectors designed for light sensing within this extensive optical range that encompasses a substantial portion of the electromagnetic spectrum. This Co2O3-Co3O4/Ppy thin film photodetector is subjected to electrical testing under varying light conditions, leading to the determination of the photocurrent density (Jph) value of 0.26 mA.cm−2. When evaluated under different monochromatic light sources ranging from 340 to 730 nm, distinct Jph values are observed for each wavelength, reflecting the nanocomposite’s ability to effectively interact with photons across this spectrum. The measured responsivity (R) and detectivity (D) values further underscore the photodetector’s efficiency. At 340 nm, the R and D values stand at 1.22 mA.W-1 and 0.275 × 109 Jones, respectively. Similarly, at 730 nm, these values are 1.21 mA.W−1 and 0.270 × 109 Jones. The combination of these favorable findings, including cost-effectiveness and high stability, position the Co2O3-Co3O4/Ppy nanocomposite as an optimal choice for a wide range of industrial applications, attesting to its potential impact in the field.
Transmission enhancement in coupled nanohole and nanodisk arrays for solar blind UV filter
Authors: Chen Yihong , Guo Wenfei , Xu Lingyi , Lai Jianjun 
Published: January 2024

Abstract
Extraordinary optical transmission (EOT) based on metallic nanohole array has great potential for optical filtering, owing to its spectral selectivity and structure-dependent tunability. However the transmittance of EOT is relatively low owing to the large loss of the metal film, particularly in the UV waveband. Herein, we propose a high transmission narrowband ultraviolet filter based on aluminum compound nanostructures on a UV-grade fused silica substrate. These compound nanostructures are consisted of periodic nanodisk and nanohole arrays with the same period in a staggered rectangular arrangement. Numerical simulations using the finite-difference time-domain (FDTD) method have shown that the compound structures exhibit high transmittance of over 70% and a narrower bandwidth of less than 50 nm in the 200–300 nm spectral region compared with the conventionally EOT of pure metallic nanohole arrays. Moreover, a broad suppression in the wavelength ranges of 300 to 1100 nm was achieved. The enhanced performance is attributed to the coupling between the surface plasmon polariton (SPP) of nanohole arrays and the localized surface plasmon resonance (LSPR) of nanodisk arrays. The compound coupled nanostructures can be used in solar-blind ultraviolet detectors and the enhancement mechanism has potential for use in other spectral regions.
Castor seed-derived luminescent carbon nanoparticles for metal ion detection and temperature sensing applications
Authors: Kumar Avinash , Kumar Ishant , Kumar Sandeep , Sharma Ankita , Gathania Arvind K 
Published: January 2024

Abstract
In the current study, castor seeds are used as a first-time natural precursor in the hydrothermal process of making carbon nanoparticles. The produced nanoparticles have a non-uniform size distribution with an average diameter of 13 nm and a roughly spherical shape. They comprise a variety of functional groups containing carbon, nitrogen, and oxygen. Their spectra have peaks at 524 nm and 441 nm for their emission and excitation, respectively. They exhibit temperature-sensitive Photoluminescence (PL) behaviour, high quantum yield value (24%), and excitation-dependent emission. In high salt environments, UV radiation, storage time, and fluorescent light they provide exceptional photostability. They have been used in applications for metal ion and thermal sensing. With a limit of detection (LOD) value of 18 μM, they are found to be both sensitive and selective to Fe3+ ions. Additionally, a nanothermosensor with good recovery and a broad temperature range (5 °C–85 °C) has also been demonstrated with a thermal sensitivity of 0.54% °C−1 based on their temperature-sensitive behaviour.
Comparison of methods to determine the fluence of monoenergetic neutrons in the energy range from 30 keV to 14.8 MeV
Authors: Nolte R , Lutz B 
Published: January 2024

Abstract
The primary reference instruments for neutron fluence measurements used at the Physikalisch-Technische Bundesanstalt are based on the primary standard for neutron measurements which is the differential neutron–proton scattering cross section. Such instruments require considerable effort for their operation and analysis. Therefore, routine measurements are carried out using a transfer instrument to facilitate the efficient provision of services to customers. A series of measurements was conducted to compare the transfer device to the primary reference instruments and ensure the traceability of neutron fluence measurements. This resulted in an improved characterisation of the instrument and new analysis procedures. For neutron energies between 144 keV and 14.8 MeV, the ratio of neutron fluence values measured with the primary reference instruments and the transfer instrument deviates from unity by less than the estimated standard measurement uncertainties of 2.6% to 3.2%. At neutron energies between 30 keV and 100 keV, however, the experimental fluence ratios deviate from unity by about 4% which exceeds the estimated uncertainties of 2.5% to 2.9%. At present, the reason for this inconsistency remains unresolved.
Large deviations and conditioning for chaotic non-invertible deterministic maps: analysis via the forward deterministic dynamics and the backward stochastic dynamics
Authors: Monthus Cécile 
Published: January 2024

AbstractThe large deviation properties of trajectory observables for chaotic non-invertible deterministic maps as studied recently by Smith (2022Phys. Rev.E106L042202) and by Gutierrezet al(2023arXiv:2304.13754) are revisited in order to analyze in detail the similarities and the differences with the case of stochastic Markov chains. More concretely, we focus on the simplest example displaying the two essential properties of local stretching and global folding, namely the doubling mapxt+1=2xt[mod1]on the real-space intervalx∈[0,1[that can also be analyzed via the decompositionx=∑l=1+∞σl2linto binary coefficientsσl=0,1. The large deviation properties of trajectory observables can be studied either via deformations of the forward deterministic dynamics or via deformations of the backward stochastic dynamics. Our main conclusions concerning the construction of the corresponding Doob canonical conditioned processes are: (i) non-trivial conditioned dynamics can be constructed only in the backward stochastic perspective where the reweighting of existing transitions is possible, and not in the forward deterministic perspective; (ii) the corresponding conditioned steady state is not smooth on the real-space intervalx∈[0,1[and can be better characterized in the binary spaceσl=1,2,..,+∞. As a consequence, the backward stochastic dynamics in the binary space are also the most appropriate framework to analyze higher levels of large deviations, and we obtain the explicit large deviations at level 2 for the probability of the empirical density of long backward trajectories.
Electronic Collections of Solved Problems in Physics and Physics Experiments
Authors: Koupilová Zdeňka , Kácovský Petr , Snetinová Marie , Mandíková Dana 
Published: January 2024

Abstract
The Collection of Solved Problems in Physics and the Collection of Physics Experiments have been developed at the Department of Physics Education, Faculty of Mathematics and Physics, Charles University for more than fifteen years. Although they are prepared as support materials for the students of our department, the audience is much larger. The Collection of Physics Problems is used not only by university students of other study programs and universities, but also by lower and upper secondary school students and their teachers. There are more than 950 (in Czech), and 320 (in English) fully solved problems covering all major areas of physics with a specially designed solution structure that promotes active thinking and the development of problem-solving skills. Selected problems are accompanied by interactive components. They are mainly prepared in GeoGebra or Wolfram Mathematica. Their aims are various, e.g., they help to create a correct geometrical view of the problem; they show the temporal development of the process; they simulate a mental process involved in solving the problem; they graphically show the solution for values other than those given; they allow to simulate various alternatives. These elements are designed for free play and exploration by the reader, and they are accompanied by tasks that lead the reader to a deeper understanding of the problem. The Collection of Physics Experiments is widely used by in-service teachers at both levels of secondary education. The collection includes approximately 170 experiments in Czech and 80 experiments in English. The focus is on selecting practical classroom experiments that captivate students. Most experiments come with video sequences presenting sample experiment settings and/or procedures.
Machine-learning Assisted Insights into Cytotoxicity of Zinc Oxide Nanoparticles
Authors: Bilgi E , Oksel Karakus C 
Published: January 2024

Abstract
Zinc oxide nanoparticles (ZnO NPs) are commercially used as an active ingredient or a color additive in foods, pharmaceuticals, sun protection lotions, and cosmetic products. While the use of ZnO NPs in everyday products has not been linked to any serious health issues so far, the scientific evidence generated for their safety is not conclusive and, in most cases, could not be validated further in in vivo settings. To settle controversies arising from inconsistent in vitro findings in previous research focusing on the toxicity ZnO NPs, we combined the results of 25+ independent studies. One way analysis of variance (ANOVA) and classification and regression tree (CART) algorithm were used to pinpoint intrinsic and extrinsic factors influencing cytotoxic potential of ZnO in nanoscale. Particle size was found to have the most significant impact on the cytotoxic potential of ZnO NPs, with 10 nm identified as a critical diameter below which cytotoxic effects were elevated. As expected, strong cell type-, exposure duration- and dose-dependency were observed in cytotoxic response of ZnO NPs, highlighting the importance of assay optimization for each cytotoxicity screening. Our findings also suggested that ≥12 hours exposure to NPs resulted in cytotoxic responses irrespective of the concentration. Considering the cumulative nature of research processes where advances are made through subsequent investigations over time, such meta-analytical approaches are critical to maximizing the use of accumulated data in nano-safety research.
Prevention-through-design approach to mitigate workers’ exposure in the graphene production processes
Authors: Boccuni F , Tombolini F , Natale C , Bellagamba I , Sebastiani F , Ferrante R 
Published: January 2024

Abstract
The growing development of new and advanced nanomaterials calls for a responsible approach to evaluate and prevent health and safety risks for workers, who could be exposed in their whole life cycle. Since many uncertainties still remain about health effects and as long as occupational exposure limits will not be available, Prevention-through-Design (PtD) approach may be proposed as a framework aimed at preventing risks, taking into account health and safety aspects starting from the design stages of innovation production processes. PtD principles could be applied to NMs, including strategies to mitigate emissions and minimize risks related to the manufacturing and use. In the present study, this approach has been successfully applied to different case studies of graphene-based NMs production in research and development laboratories, with promising applications in the transition towards the industrial scale. The methodology includes the integration of ISO control banding tool and OECD multi-metric and tiered approach to assess exposure by inhalation, improving the reliability of risk analysis framework. The findings support the complementary use of qualitative and quantitative data to identify tailored control measures and prevent risks in parallel with the development of NMs production processes, by giving also the opportunity to evaluate their effectiveness.