bluuebunny/crossref_metadata_2025_split huggingface dataset:
On the quantum Guerra–Morato action functional
Authors: Knorst Josué , Lopes Artur O. 
Published: August 2024

Given a smooth potential W:Tn→R on the torus, the Quantum Guerra–Morato action functional is given by I(ψ)=∫(DvDv*2(x)−W(x))a(x)2dx, where ψ is described by ψ=aeiuℏ, u=v+v*2, a=ev*−v2ℏ, v, v* are real functions, ∫a2(x)dx = 1, and D is the derivative on x ∈ Tn. It is natural to consider the constraint div(a2Du) = 0, which means flux zero. The a and u obtained from a critical solution (under variations τ) for such action functional, fulfilling such constraints, satisfy the Hamilton-Jacobi equation with a quantum potential. Denote ′ =ddτ. We show that the expression for the second variation of a critical solution is given by ∫a2D[v′] D[(v*)′] dx. Introducing the constraint ∫a2Du dx = V, we also consider later an associated dual eigenvalue problem. From this follows a transport and a kind of eikonal equation.
Inflation and dark matter from the low entropy hypothesis and modeling mechanism of modified gravity
Authors: Liu Jackie C H 
Published: August 2024

Abstract
The hypothesis of low entropy in the initial state of the Universe usually explains the observed entropy increase is in only one time direction: the thermodynamic arrow of time. The Hamiltonian formalism is commonly used in the context of general relativity. The set of Lagrange multipliers are introduced in the formalism, and they are corresponding to the Hamiltonian constraints which are written in terms of ‘weak equality’—the equality is satisfied if the constraints hold. Follow the low-entropy hypothesis, we postulate a modeling mechanism—a weak equality (of modeling) that holds only on the subspace of the theory space of physical models defined by some modeling constraints. By applying the modeling mechanism, we obtain a specific model of modified gravity under specific modeling conditions. We derive a novel equation of modeling from the mechanism, that describes how different gravitational models emerge. The solution of the modeling equation naturally turns out to be the model of R
2-gravity (with additional terms) if ordinary matter is negligible. We also found that this mechanism leads to two models: large-field inflation and wave-like dark matter (DM). Interestingly, the wave-like DM model is supported by the most recent observations of Einstein rings.
Angle-insensitive perfect light transmission and absorption in one-dimensional photonic crystal heterostructures
Authors: Wei Guochao , Wang Beibei , Du Kang , Zhang Bohan , Han Weijia , Zhu Wei , Wang Shengxiang 
Published: August 2024

Abstract
Perfect light transmission in metamaterials typically experiences a frequency shift as the incident angle of the wave increases, limiting their applicability across wide angles. One-dimensional photonic crystal heterostructures, with elliptic-shaped equi-frequency contours, exhibit angle-in sensitive properties. However, an inevitable blue shift in the optical response still occurs as the incident angle increases. In this work, we present two photonic crystal heterostructures, one of which incorporates the optical phase-change material Sb2S3. By joining two heterostructures with distinct Zak phases, we achieve perfect light transmission. Specifically, as incident angle of wave increases, the transmission peak can be strictly maintained without a frequency shift by tuning the phase (refractive index) of Sb2S3. Moreover, by combining the heterostructures with a thin silver film, we demonstrate a Tamm plasmon polariton mode with angle-insensitive properties, facilitating angle-tolerant light absorption. Our work offers an innovative approach to designing highly angle-tolerant and tunable devices, which could be applied in various fields such as telecommunications, sensing, and imaging systems, where maintaining performance across a wide range of incident angles is crucial.
Incremental effects of near-atmospheric-pressure low-temperature air plasma jet irradiation on polyphenol content in harvested onions
Authors: Kawakami Retsuo , Mukai Rie , Matsumura Takumi , Fujii Haruki , Jinbo Kurumi , Sogawa Ryutaro , Hashimura Nene , Ohashi Koichi 
Published: August 2024

Abstract
We present a new food processing method to increase the content of polyphenols, which are a type of health-promoting food component, in harvested onions using atmospheric-pressure low-temperature plasma technologies. Harvested onions were locally irradiated for different times with a low-temperature air plasma jet generated near atmospheric pressure and stored in the dark for various periods. The plasma-irradiated area was 7 mm2. The plasma irradiation was performed without removing the onion peel. After storage following plasma irradiation, the onion was peeled and cut into the outer, middle, and inner parts, analysing polyphenol content at each edible onion part, namely the bulb. The polyphenol content in the onions irradiated for 30 min and stored for 3 d increased over that of unirradiated onions stored for the same period. This increase occurred regardless of the bulb parts. Neither the plasma-irradiated onions without storage nor the air gas-irradiated onions without air plasma irradiation exhibited a higher polyphenol content. In particular, quercetin aglycone, quercetin 4′-O-glucoside, quercetin 3-O-glucoside, and quercetin 3,4′-O-glucoside were increased in the polyphenol content, contributing to an increase in the antioxidative activity. NO3
− and NO2
− were introduced into water under an onion peel by air plasma irradiation for 30 min and decreased after 3 d of storage but remained. However, no H2O2 was introduced. The plasma-introduced NO3
− was distributed throughout the onion owing to the plasmodesmata serving as channels for cell-to-cell transports of molecules. These results suggest that the increased polyphenol content originates from the transcriptional factors acting in stress responses to the plasma-introduced NO3
− and NO2
−, not the electric field-induced electroporation, in onion cells. The present study provides valuable insights into interactions between low-temperature air plasma jets and onion cells.
A gear fault diagnosis method based on reactive power and semi-supervised learning
Authors: Liang Guangyu , Li Feng , Pang Xinyu , Zhang Bowen , Yang Peng 
Published: August 2024

Abstract
In gearbox gear fault diagnosis based on motor current signals, the gear fault characteristic frequency component is often overshadowed by the fundamental frequency component of the current. In addition, the complex working conditions during actual production and use make it difficult to collect gear operation monitoring data containing labeled feature information. To address the above problems, a semi-supervised learning method based on reactive power signals is proposed for gear fault diagnosis of gearboxes. First, the method utilizes the Hilbert transform to process the current signal of the drive motor in the mechanical system, from which the reactive power is constructed. Then, the reactive power signal is analyzed by spectral analysis as a basis for gear fault diagnosis. Subsequently, the GAF-CNN-MTDL(Gramian angular field—convolutional neural network-mean teacher deep learning) fault diagnosis model is proposed to convert the reactive power signal into a two-dimensional image by using the GAF, and the semi-supervised training method of the average teacher is applied to input the fault dataset into the gear fault diagnosis model which is based on the CNN as the main backbone after the fault dataset has been divided into the labeled and the unlabeled dataset in accordance with a certain ratio. Finally, the gear fault dataset is used for method validation. The experimental outcomes demonstrate the method’s proficiency in effectively emphasizing the fault feature information pertaining to the gear part, and the introduced GAF-CNN-MTDL fault diagnosis model enables the utilization of a minimal number of labeled samples to achieve highly accurate gear fault diagnosis.
Cellulose acetate membranes loaded with WO3/g-C3N4: a synergistic approach for effective photocatalysis
Authors: Sasikala Velusamy , Sarala Sakarapani , Karthik Palani , Prakash Natarajan , Mukkannan Azhagurajan 
Published: August 2024

Abstract
The objective of this study is to develop an efficient, easily recoverable membrane-based photocatalyst for removing organic pollutants from aqueous solutions. This study documents the effective synthesis of a novel composite photocatalyst comprising WO3/g-C3N4 (WCN) loaded onto cellulose acetate (CA). The physicochemical properties of the synthesized nanocomposites were validated using a range of techniques, including Fourier transform infrared spectroscopy, x-ray diffraction, scanning electron microscopy (SEM), energy-dispersive x-ray spectroscopy, and UV–visible diffuse reflectance spectroscopy. SEM analysis revealed that the WCN particles exhibited a well-decorated arrangement on the CA surface in the form of spherical particles. The successfully synthesized film was utilized as a potential adsorbent for removing organic pollutants such as Rhodamine B (Rh-B) and Methylene blue (MB) from aqueous solutions under UV light illumination. The results showcased the significant potential of the WCN@CA nanocomposite, achieving a remarkable 83% and 85% efficiency in eliminating Rh-B and MB. The pseudo-first-order kinetic models were found to be appropriate for both dye adsorption onto the WCN@CA nanocomposite. The WCN@CA catalyst, capable of being reused five times without significant loss of efficiency, shows great potential for decomposing toxic organic pollutants. The novelty of this work lies in the innovative combination of WCN with CA, resulting in a highly efficient and reusable photocatalyst for environmental remediation.
4D printing of magneto-responsive shape memory nano-composite for stents
Authors: Kim Young Bin , Song Heechan , Kim Suji , Chun Heoung-Jae 
Published: August 2024

Abstract
This study focuses on the 4D printing simulation technique of magneto-responsive shape memory nanocomposite stents. A nanocomposite material was created by incorporating polycaprolactone, a shape memory material, with Fe3O4 to enhance magnetic responsiveness and stiffness. Tensile tests were conducted, and the material properties were applied to finite element analysis. Shape memory experiments were also performed to measure the temperature at which shape memory progression occurs due to magnetic response. In the 4D printing simulation, different coefficients of thermal expansion and the measured temperatures were reflected in the sections where shape memory is activated to implement shape memory behavior. The specimen simulation confirmed shape memory behavior progressing from 145 degrees to 3 degrees, while the stent simulation demonstrated satisfactory expansion to a radius of 3 mm. This study proposes a controllable method for implementing shape memory considering temperatures induced by magnetic response, showing potential for various medical device applications.
Double-layer metasurface for blocking the fundamental SH wave
Authors: Miao Hongchen , Cao Xi , Fu Mingtao 
Published: August 2024

Abstract
This work introduces a double-layer metasurface to isolate the fundamental shear horizontal wave (SH0 wave). The metasurface is designed to split the SH0 wave source into two parts and then manipulate the two waves to be out of phase and have equal amplitude upon reaching the end of the metasurface. This results in interference cancellation, effectively blocking the propagation of SH0 waves into the protected zone. Firstly, the metasurface is designed theoretically, utilizing rectangular strips to constitute the substructure. Subsequently, finite element simulations are conducted to verify the correctness of the theoretical design. Finally, the metasurface is fabricated using 3D printing, and its performance is evaluated through experiments. The results indicate that the metasurface can function as a cage for SH0 waves, trapping different types of SH0 waves located at any position within the cage. Furthermore, when the source of SH0 waves is positioned outside the cage, the metasurface can effectively impede their propagation into the interior region of the cage. The proposed double-layer metasurface provides a simple approach to blocking SH0 waves, which may have potential applications in practical engineering.
A new hyperchaotic system: circuit realization, nonlinear analysis and synchronization control
Authors: Mobayen Saleh , Mostafaee Javad , Alattas Khalid A , Ke Ming-Ta , Hsueh Ya-Hsin , Zhilenkov Anton 
Published: August 2024

Abstract
This paper presents a novel seven-dimensional nonlinear hyperchaotic system characterized by a minimal number of nonlinear terms and variables, yet exhibiting high complexity. Standard nonlinear analysis is conducted to unveil the system’s intricacies, emphasizing its notable feature of possessing four to five Lyapunov exponents in certain intervals, signifying its volatility and complexity. Hyperchaotic synchronization is explored using a novel nonsingular terminal sliding control design, effectively achieving synchronization between two hyperchaotic master systems and a hyperchaotic slave system within finite time while mitigating the chattering phenomenon. Practical evaluations through orbital analysis, numerical simulations, and practical implementations further substantiate the efficacy and performance of the proposed system. This study contributes to the advancement of chaotic and hyperchaotic systems, particularly those with dimensions exceeding 5D, offering insights into synchronization techniques and practical applications in engineering and other scientific disciplines.
Scattering of e∓ in beryllium isonuclear series: cross sections and transport characteristics
Authors: Shorifuddoza M , Ragimkhanov G B , Khalikova Z R , Das Pretam K , Watabe H , Fazlul Haque A K , Alfaz Uddin M 
Published: August 2024

Abstract
The elastic scattering of electrons and positrons by beryllium atoms and its isonuclear ion states is described in this paper in terms of differential and various angle integrated cross sections. For this element, the critical minima in the elastic differential cross sections and the optimum spin polarization sites are found. These calculations are performed using the Dirac partial wave analysis (DPWA) and a projectile-target modified complex optical model potential. Further, the Monte Carlo method is used to calculate the transport characteristics of electrons in a mixture of inert gas (He, Ar) and beryllium vapor for electric field values E/N = 1-100 Td, taking into account inelastic collisions. We studied the effect of metal vapor concentration on drift velocity, average electron energy, diffusion and mobility coefficients. Finally, we investigated the effect of beryllium vapor on the electron energy distribution function in the inert gas. On comparing present work with existing theoretical calculation, a reasonable agreement is observed.
A review of molecular dynamic simulations to study the effect of helium bubble formation in metal crystals
Authors: Sharma Saurabh S , Parashar Avinash 
Published: August 2024

Abstract
Nuclear power has the potential to replace traditional energy resources; however, the challenges associated with nuclear energy need to be addressed. The sustainable growth of nuclear power requires extensive studies to ensure a safer reactor and auxiliary structures lifecycle. This article aims to review the challenges associated with investigating the effect of irradiation on the thermo-mechanical behaviour of nuclear materials. Article has presented a comprehensive review of the atomistic simulations to investigate the impact of helium bubbles (generates from transmutation) on nuclear materials. The hazards associated with handling the irradiated samples of nuclear reactors have provided the impetus for developing computational models in the framework of atomistic environments. The temporal and spatial scale associated with irradiation-induced defects can be easily created in molecular dynamics-based simulations. This review article compiled force fields employed to simulate the interatomic interaction in metals in conjunction with helium bubble.
Impact of gravity on the performance of multi-inlets and multi-outlets valveless diaphragm micropumps
Authors: Gavali Sachin R , Pawar Dr. Prashant M 
Published: August 2024

Abstract
The influence of gravity plays a crucial role in micropumps’ fluid dynamics. Gravitational forces have an intricate effect on the fluid flow of the micropump. Understanding gravity’s influence on micropump fluid dynamics is critical for improving the fine design features and operational efficacy of the microscale pumping systems. This study conducted thorough a numerical analysis on the Single Inlet Double Outlet Diaphragm (SIDOD) micropump and the Double Inlet Single Outlet Diaphragm (DISOD) micropump to determine how gravity influences the performance. In this research, the optimal frequency is identified as 3 Hz. At this frequency, the SIDOD flow rate increases from 313 μl min−1 without gravity to 327.77 μl min−1 with gravity, marking an increase of 4.77%. Similarly, the DISOD flow rate rises from 177.78 μl min−1 without gravity to 184 μl min−1 with gravity, reflecting an approximate 3.56% increase. A comprehensive understanding of gravity impact is crucial for aerospace applications, where micropumps may operate under fluctuating gravitational conditions. The potential applications of micropumps in medical devices, particularly drug delivery systems, experience gravitational variations.
Genuine entanglement detection via projection map in multipartite systems
Authors: Mallick Bivas , Nandi Sumit 
Published: August 2024

Abstract
We present a formalism to detect genuine multipartite entanglement by considering projection map which is a positive but not completely positive map. Projection map has been motivated by the no-pancake theorem which repudiates the existence of a quantum operation that maps the Bloch sphere onto a disk along its equator. The not-complete positivity feature of projection map is explored to investigate genuine multipartite entanglement in arbitrary N-qubit quantum systems. Our proposed framework can detect some important classes of genuinely entangled states in tripartite and quadripartite scenarios. We provide illustrative example to show the efficacy of our formalism to detect a class of tripartite PPT bound entangled states. Finally, we construct a suitable witness operator based on projection map to certify genuine tripartite entanglement, which is likely to be feasible experimentally.
Unveiling the mass-loading effect on the electrochemical performance of Mn3O4 thin film electrodes: a combined computational and experimental study
Authors: A Pramitha , Hegde Shreeganesh Subraya , Ramachandra Bhat Badekai , Yadav K Chandrika , Chakraborty Shamik , Ravikumar Abhilash , George Sajan D , Sudhakar Y N , Y Raviprakash 
Published: August 2024

Abstract
The remarkable storage performance of manganese oxide (Mn3O4) makes it an appealing option for use as electrodes in electrochemical capacitors. However, the storage kinetics were significantly influenced by the mass loading of the electrode. Herein, we have inspected the dependency of mass loading on the storage performance of the spray pyrolyzed Mn3O4 thin film electrodes along with the correlation of structural and morphological characteristics. X-ray diffraction and Raman spectroscopic studies proven the formation of spinel Mn3O4 with a tetragonal structure. Morphological analysis revealed that all films exhibited fibrous structures with interconnected patterns at higher mass loadings. Moreover, the surface roughness and wettability of the electrode surface were influenced by variations in mass loading. Notably, thin-film electrode with a mass loading of 0.4 mg cm−2 exhibited the highest specific capacitance value of 168 F g−1 at 5 mV s−1 in a three-electrode system. Further, electrochemical impedance spectroscopic studies showed that there were noticeable changes in the capacitive behaviour of the electrode with respect to variations in mass loading. Moreover, the Dunn approach was employed to differentiate the underlying storage mechanism of the Mn3O4 electrode. Additionally, first-principles Density Functional Theory (DFT) studies were carried out in connection with the experimental study to comprehend the structure and electronic band structure of Mn3O4. This study underscores the critical importance of mass loading for enhancing the storage performance of Mn3O4 thin-film electrodes.
Electronic structure and phonon transport properties of HfSe2 under in-plane strain and finite temperature
Authors: Li Wei , Xue Feng-ning , Zhao Peng-bo , Lu Yong 
Published: August 2024

Abstract
The electronic structure and phonon transport properties of HfSe2 under different in-plane strains at finite temperatures are systematically investigated by combining first-principles calculations with machine learning force field molecular dynamics simulations. Within a strain range of -3% to 3%, the electronic band gap value of HfSe2 varies between 0.39 and 0.87 eV. Under compressive strain, the conduction band minimum moves towards the Fermi level, with the distribution of electrons near the valence band maximum becoming more delocalized. This will reduce the scattering of electrons during the transport process, helping to improve the carrier mobility. Under tensile strain, the localization of the density of states near the valence band maximum is strengthened, accompanied by enhanced metallic properties of the Hf-Se bonds, which facilitates the enhancement of the thermoelectric power factor. Both compressive and tensile strains intensify the coupling of phonon normal modes with phonon scattering, and elevating the temperature amplifies this impact. The anharmonicity-induced reduction in phonon frequencies is especially pronounced for modes in the vicinity of the Debye frequency. This not only curtails the phonon lifetimes but also diminishes the lattice thermal conductivity through the enhancement of vibrational coupling among optical branches and the reduction of the group velocity in acoustic branches. These results demonstrate the synergistic effects of strain and temperature on the electronic structure and phonon transport of HfSe2.