bluuebunny/crossref_metadata_2025_split huggingface dataset:
Research on the effect of different tungsten content liner materials on EFP forming
Authors: Wang Hong-Bin , Li Yue , Li Ying , Li Ming-Jian , Xie Meng-Di , Guan Chang , Lin Xue 
Published: December 2024

Abstract
In response to the development of EFP warhead technology at home and abroad, as well as the requirements for long-range and high power in future battlefield environments for EFP warheads, a study was conducted on the influence of different tungsten content liner materials (pure Ta, Ta2.5W, Ta5W, Ta10W) on EFP formation. The results showed that the comprehensive performance of EFP formed by pure Ta, Ta5W, and Ta10W was slightly inferior to Ta2.5W, and Ta2.5W had higher strength and better flight stability, making it an ideal liner material.
Research Progress on the Impact Resistance of Basalt Fiber-Reinforced Polymer Composites
Authors: Zhang Z M , Lu R J , Zhang H , Bai L H , Sun Y J 
Published: December 2024

Abstract
Basalt fibers exhibit excellent properties and have diverse applications. This paper thoroughly investigates the impact resistance of polymer matrix composites reinforced by basalt fibers and analyzes the failure mechanisms during impact, including micro-deformation, delamination, and fiber fracture. Basalt fiber-reinforced resin matrix composites consist of a reinforcement phase, a matrix phase, and an interface phase. To strengthen the material’s resistance to impacts, various approaches have been explored, including optimizing the matrix resin (e.g., selecting vinyl resin and toughening treatments), optimizing the reinforcement phase (e.g., fiber hybridization, morphology optimization, and interlayer hybridization), and improving the interface phase (e.g., coupling agent modification and carbon nanotube grafting). These optimization measures can significantly enhance the impact resistance of basalt fiber-reinforced polymer materials under low-velocity impact loads. Under high-velocity impact loads, increasing the number of laminate layers or employing three-dimensional weaving techniques can significantly improve the material’s impact resistance. These research findings aim to provide a theoretical foundation and practical references for the application of basalt fiber-reinforced polymer materials within the domain of impact resistance.
Numerical simulation study of tungsten alloy segmented rod penetration into steel target
Authors: Guo Xin‐qi , Zhou Tong , Shi Yu‐peng , Chen Zhao 
Published: December 2024

Abstract
Long rod projectile has strong penetration capability due to its high specific kinetic energy, however there exists a limit value to improve its penetration depth by increasing the aspect ratio. A higher penetration efficiency can be obtained by equal-mass segmented rod under certain conditions. Numerical simulation study of tungsten alloy segmented rod penetrating semi-infinite steel target with the speed of 1000m/s-3000m/s was carried out. Penetration process of segmented rods were analysed and compared with the equal-mass long rods. The penetration capability of segmented rods with different number of segments and different speeds on the semi-infinite steel target was studied, and the penetration mechanism was analysed. The numerical simulation results of the ideal segmented rod penetration on thick targets can provide a reference for its practical application.
Erosion and wear of barrel and its impact on projectile force
Authors: Yang Diao , Liu Peng-ke , Di-wu Si-jie , Li Jia-xing 
Published: December 2024

Abstract
During gun firing, the inner surface of the barrel will undergo erosion and wear, leading to changes in the gap between the projectile and barrel. This cause the load environment in which the projectile moves inside the barrel to become more severe, and the cutting and wear of the rotating band increase. Therefore studying the erosion and wear of barrel and its impact on projectile force is of great significance for the lifespan and launch safety of the barrel. By testing the erosion and wear of the barrel with different firing numbers and analysing the anatomy of the end of life barrel, the damage and expansion patterns of the barrel were obtained. On this basis, a coupled dynamic model of projectile and barrel considering erosion and wear was established, and the influence of erosion and wear on the force acting on the motion process of the projectile inside the barrel was calculated. The results indicate that the erosion and wear value of the barrel follows a cubic polynomial along the axis, and the maximum value is located at the commencement of rifling. At the end of the barrel’s life, the engraving resistance of the rotating band is reduced by about 38.7%, the surface contact force between the rotating band and rifling land is reduced by 36.4%, and the impact force between the bourrelet and barrel is increased by about three times.
Modelling and Experimental Verification of the Internal Ballistics Trajectories in Gas Combustion Explosion Ejections
Authors: Ren Jie , Bi Shuo , Yao Lin , Lin Guowen 
Published: December 2024

Abstract
The internal ballistic process and flow field were examined in the context of the launch of hydrogen-oxygen bipropellant explosives. This was achieved through the establishment of an internal ballistic launch model, which employed the high-low pressure launch principle. This approach diverges from the conventional tenets of internal ballistic theory, wherein a combustible gas is employed in lieu of a propellant for the purpose of launch. Furthermore, a high-low pressure chamber scheme was devised with the objective of mitigating the overload peaks that are typically encountered during the launch process. A fluid simulation was employed to conduct a virtual analysis of the flow field alterations within the high-low pressure chamber during the launch of a hydrogen-oxygen bipropellant explosive utilizing the internal ballistic model. The pressure variations over time within the high-low pressure chambers throughout the launch process were investigated, and the results were supplemented with load motion and physical ejection experiments. The results demonstrated that the simulated and calculated curves exhibited slight elevation relative to the real curve under identical conditions, yet remained within an acceptable range of error. Our study successfully validated the feasibility of utilizing hydrogen-oxygen combustion launch schemes for small load ejection, offering a valuable reference point for future research and optimization in this domain.
Analysis of transformer moisture treatment based on DIRANA dielectric spectrum analyzer
Authors: Chen Qiong , Zhao Wenlin , Chen Lili , Hu Siyu 
Published: December 2024

Abstract
Transformer is the infrastructure of power transmission and distribution, which is widely used in various fields. Its good insulation performance guarantees its safe operation. Water content is one of the critical factors affecting the insulation performance of transformer, so monitoring transformer water content is particularly important. In the case of transformer damp accident at a hydropower station, the transformer water content field test analysis test, combined with the transformer insulation test and transformer conventional/special test results, verified the validity and accuracy of the test results of the DIRANA dielectric spectrum analyzer. It provides a theoretical basis for the broadband and non-destructive testing of transformer water content and has a guiding significance for the field diagnosis of transformer insulation performance.
Joint resource optimization method for integrated sensing and communication system based on communication rate maximization
Authors: Niu Weigang , Xie Jianli 
Published: December 2024

Abstract
As wireless communication tech swiftly evolves, Integrated Sensing and Communication (ISAC) systems are increasingly garnering attention in research. This document suggests a collaborative resource optimization technique for ISAC, centered on maximizing communication rates, with the goal of enhancing communication speeds and optimizing system efficiency through fair distribution of system resources. The article begins by examining the fundamental structure and principles of a communication-aware integrated system, followed by the development of a resource optimization model reliant on the rate of communication. For the resolution of this non-convex optimization issue, a refined genetic optimization algorithm iteratively fine-tunes the subcarrier and power resources. The simulation findings demonstrate the method’s ability to enhance communication efficiency and lessen the energy usage of the system.
Room-Temperature Ethanol Sensing by PVA/ZnS/ZnO:Fe Nanocomposite Synthesized by Chemical Precipitation Technique
Authors: Gogoi Arista , Bhattacharjee Suparna 
Published: December 2024

Abstract
In this work, we report the synthesis of PVA/ZnS/ZnO:Fe core/shell nanocomposite using the chemical precipitation method. The core/shell structure offers several advantages for gas sensing, including improved gas adsorption, selectivity, and stability. Polyvinyl alcohol (PVA) has been used as the matrix while Zinc Chloride (ZnCl2) and Sodium Sulphide (Na2S) has been used as the precursors for the synthesis of ZnS nanoparticles. For the synthesis of ZnO nanoparticles, Polyvinyl alcohol (PVA) has been used as the capping agent and Zinc Nitrate (Zn (NO3)2) and Sodium Hydroxide (NaOH) have been employed as the precursors. In the work, one PVA/ZnS/ZnO:Fe sample has been synthesized with a constant concentration of Fe doping, maintaining a constant reaction time. Characterization of the synthesized sample is achieved through UV-visible Spectrophotometry (UV-vis), Photoluminescence Spectrophotometry (PL), X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Energy Dispersive Analysis of X-ray (EDAX) and Transmission Electron Microscopy (TEM) respectively. From the characterization results the formation of PVA/ZnS/ZnO:Fe core/shell nanocomposite is confirmed. The XRD pattern has been used to determine the crystalline nature and size of the crystal. SEM images reveal more or less cloudy-like nanostructure in PVA/ZnS/ZnO:Fe samples. After that, the selectivity study of the synthesized sample towards various gases was done. Accordingly, ethanol was chosen and a sensitivity study of the synthesized nanoparticles was performed in the presence of ethanol gas.
Morphological Study of Early-Stage Biomimetic Carbonated Hydroxyapatite Coating Development on Sputtered ZnO Thin Films
Authors: Rajkumar Pradhyut 
Published: December 2024

Abstract
For a deeper understanding of crystal nucleation, development, and alteration on crystalline substrates, hydroxyapatite films on sputtered ZnO are formed. The substrates used were as-deposited nanostructured ZnO thin films on glass. These films were produced by pulsed DC magnetron sputtering, as described in one of our previous works and then immersed in a calcifying solution for 24 hours to allow for hydroxyapatite nucleation and production. The calcifying solution combines equal volumes of aqueous calcium (7.5 and 10 mM) and carbonate-containing phosphate (4.5 and 6 mM) solutions at 37 °C with a pH range from 7.2 to 7.4. According to Field Emission Scanning Electron Microscopy (FESEM) analyses, the substrate type (sputtering power) and the concentration of the precursors used in the preparation of the calcium and carbonate-containing phosphate solution influence the structure and morphology of the hydroxyapatite films. Furthermore, using ZnO thin films deposited on glass made at lower sputtering powers as substrates results in a denser nanocrystalline hydroxyapatite coating than that grown on ZnO thin films sputtered at higher sputtering power. The nucleation of hydroxyapatite onto substrates is controlled by both charged surfaces and the supersaturation of the calcifying solution, with larger concentrations of the precursor solutions producing thicker films.
Exploration of the dielectric properties in Na2Co2TeO6 through Impedance Spectroscopy
Authors: Maurya Amit , Pal D 
Published: December 2024

Abstract
We have investigated the dielectric and electrical properties in a non-centrosymmetric honeycomb lattice compound Na2Co2TeO6. The electro-active zones identified through impedance spectroscopy within the frequency range of 100Hz – 1MHz are explained by the presence of both grains and grain boundary phases in the microstructure of Na2Co2TeO6. The alteration of impedance plane plots has been discussed in connection with the change in relaxation time at different temperatures. The analysis of the Nyquist plot indicates a substantial contribution of grain boundary resistance to the total resistance. We have observed a quasi-semiconducting type of properties in the variation of grain resistance with temperature, arising due to the oxygen vacancy in the path (Co2+-O-Na1+-O-Co2+). An examination of the electrical transport characteristics of Na2Co2TeO6 indicates a pronounced frequency dependency, indicating the motion of the charge carriers arises due to correlated barrier hopping.
CdS-Titania nanocomposite: An improved visible active photocatalyst for dye degradation
Authors: Banerjee Nisha , Nair Ranjith G 
Published: December 2024

Abstract
Photocatalysis is emerged as a feasible solution for addressing the issues related to green energy production and sustainable environment. Among various reported photocatalysts, Titania is one of the widely used one due to its high stability, and low cost. However, its wide band gap and poor charge separation limits its photocatalytic performance in the UV region only. Coupling of Titania with suitable visible active semiconductor is a proven strategy to improve the performance. In this context, CdS-Titania (Anatase) nanocomposite has been synthesized via facile hydrothermal route and its impact on photon absorption and carrier separation efficiency were studied. The synthesized samples were characterized through various structural, optical and electrochemical analysis. X-ray diffraction pattern confirms the formation of CdS-Titania (Anatase) composite and its physicochemical properties. FE-SEM confirms the disintegration of CdS microspheres into smaller agglomerated particulates. The absorption spectroscopy confirms that induction of CdS improves the visible light absorption capacity. The composite consisting CdS-Titania (Anatase) (CdSA) shows the maximum red shift in the visible range. The low charge transfer resistance of composite observed in EIS analyses further confirms the proper separation of charge carriers at junction. The photocatalytic degradation performance under visible light irradiation was performed and found that the nanocomposite performs better than the pristine Anatase and CdS. CdSA has been found to have superior photocatalytic ability. It shows 43 times and 1.52 times better performance than pristine Titania and CdS respectively. This can be attributed to the enhanced visible photon absorption achieved through the successful formation of heterojunction. This opens up a new area of research for improving the performance of pristine Titania.
Influence of Capping Agents for Controlling Structural and Optical Properties of Copper Chalcogenide (CuS) Nanoparticles
Authors: Khongiang Longkhraw , Deb Sujata , Kalita P. K. 
Published: December 2024

Abstract
Copper based chalcogenides have attracted considerable attention in recent years due to their exclusive properties that are tunable by the structure, stoichiometry and composition. Among the categories of chalcogenides, copper sulfide (CuS) has been the subject of extensive research as it exists in various stable phases. The present work emphasizes on the impact of capping agents: aloe vera and polyvinyl alcohol (PVA) on structural and optical properties of CuS (covellite) nanoparticles. Structural characterization of the as-synthesized CuS/PVA and CuS/Aloe vera nanoparticles is done using X-ray diffraction (XRD) while their morphology is examined with Field Emission Scanning Electron Microscopy (FESEM). The chemical stoichiometry of synthesized CuS nanoparticles is performed using Energy Dispersive X-ray Spectroscopy (EDS). UV-Vis absorption and photoluminescence (PL) spectroscopy are employed to study the optical properties. The XRD shows the presence of diffraction peaks for CuS. The average crystallite size calculated for the prepared CuS/PVA and CuS/Aloe vera nanoparticles using Debye Scherrer’s equation are 4.59 nm and 3.58 nm respectively. Band gap calculation from Tauc’s plot showed the corresponding direct optical band gap of the synthesized CuS/PVA and CuS/Aloe vera nanoparticles to be 2.87 eV and 3.75 eV, indicating blue-shift due to quantum confinement. Photoluminescence spectra of as-synthesized samples indicated strong emission at 467 nm for both the samples: CuS/PVA and CuS/Aloe vera. Optical properties of the as-synthesized nanoparticles showed that they are promising materials for optoelectronic devices. Aloe vera, the environment friendly and non-toxic agent is found to be a suitable “green” passivator in stabilizing CuS nanoparticles.
Exceptional Photodegradation Efficiency of Eu3+: GdVO4 Against Methylene Blue and Methyl Orange Textile Dye Mixtures
Authors: Ashiihrii Kapani , Boro Bhaben , Ansari Aftab 
Published: December 2024

Abstract
We report on efficacy of Eu3+ doped GdVO4 nano system as an effectual photocatalytic agent for textile dye degradation. The nano system synthesized via one step solid state method displayed band gap of the nano system determined to be ~3.5 eV which can be considered suitably apt for usage in photocatalytic reactions. Photocatalysis is one of the leading technologies so as to facilitate degradation of textile dye wastes. Most of the dyes used display harmful nature to the ecology if left untreated. Among the various dyes, Methylene Blue (MB) and Methyl Orange (MO) dyes were chosen as the target citing their high usage in textile industry. Most of the textile dyes used seep into the drainage wherein they remain in a mixed phase leading to complex chemical structure and hence raising problems in degradation process. In a first, we describe the degradation upon mixing the two dyes together. Our findings demonstrate the remarkable capability of the photocatalytic process facilitating ~61% and ~33% degradation in the Methylene Blue and Methyl Orange respectively. Interestingly, upon subjecting the photocatalyst into the mixture the photodegradation rose up to ~ 87% for MB and ~45% for MO in their mixed phase. Hence proving the system to be more effective in dye mixtures. The changes in the molecular structure upon degradation was analyzed using FTIR spectroscopic studies. We observed formation of intermediates upon the catalytic reaction that add to the degradation process. The degradation rate saturation in the degradation process was reached by ~240 min. The comprehensive report on effect of RE dopant in RE based vanadate matrix would provide new insights to resolve existing concerns in addressing issues relating removal of organic contaminant posing environmental threat and also carry multi-functional scope in industrial relevance.
Analysis of FUV Emission in the Vicinity of R136 Cluster in 30 Doradus
Authors: Dev Barenya Kumar , Saikia Gautam , Bordoloi Olag Pratim , Shalima P. , Gogoi Rupjyoti 
Published: December 2024

Abstract
The intense diffuse radiation of galactic systems in the far ultraviolet (FUV) range is primarily due to dust scattering, with properties such as albedo, scattering phase function, and optical depth playing a crucial role. Utilizing observed data from the Far Ultraviolet Spectroscopic Explorer (FUSE) telescope, we investigated dust-scattered diffuse FUV emission from the 30 Doradus nebula in the Large Magellanic Cloud (LMC), offering insight into interstellar dust properties essential for understanding starburst galaxies. Employing a simple spherical shell model in the Monte Carlo based radiative transfer tool SKIRT, we simulated the dust-scattered FUV emissions, and compared them with the observed data. We predicted an excess of FUV photons being scattered near the star cluster R136 (formerly RMC 136) and ascertained a robust linear correlation between observations and model. Additionally, our best-fit model predicted the hydrogen column density near R136 to be approximately ~ 4.36 × 1021cm−2, corresponding to a color excess of E(B − V ) = 0.2, with the contribution of diffuse scattered FUV emissions estimated at 13% of the total radiation. This model can be further extended to better understand dust properties of similar starburst environments in the local universe and beyond.
Study of Neutrino Mass Matrix with One Vanishing Subtrace using Trimaximal Mixing
Authors: Dey Sangeeta , Kumar Priyanka , Patgiri Mahadev 
Published: December 2024

Abstract
In this work we study the phenomenological implications of neutrino mass matrix with one vanishing subtrace using trimaximal mixing matrix, TM
1. Here, we have analysed only two patterns of one vanishing subtrace i.e., S
11 = 0 and S
12 = 0. We find that the two considered patterns accommodate the present neutrino oscillation data for both Normal Hierarchy and Inverted Hierarchy. For both the patterns, we present the correlation plots of the neutrino oscillation parameters and calculate the effective Majorana mass, hence study the neutrinoless double beta decay rate.
Semi-Analytical Study of Charged-Current νN scattering cross-section with High Energy and Ultra High Energy Probes
Authors: Bora Deep Jyoti , Imtiaz Raisa , Devee Mayuri 
Published: December 2024

Abstract
In this study, we investigate the cross-section of neutrino-nucleon scattering in both the high-energy (100–700 GeV) and ultra-high-energy (108–1013 GeV) regimes. This analysis aims to provide deeper insights into the weak interaction processes involving neutrinos, a particle that remains elusive in many aspects. Our work contributes to the theoretical understanding and determination of neutrino-nucleon cross-sections. At high energies, our results exhibit slight deviations from previously available data but remain consistent with established trends. At ultra-high energies, our analytical results show strong agreement with those reported in the literature. Additionally, we suggest that incorporating higher-order QCD corrections could further improve the accuracy of our results.
An Experimental Study of Stable and Chaotic Structures in a Plasma System Analogous to Earth Magnetosphere
Authors: Goswami J. , Goswami D. , Chutia B. , Kausik S. S. , Saikia B. K. 
Published: December 2024

Abstract
In recent years, studies on magnetospheric plasmas have increased drastically. Different theoretical models are proposed to match the data observed from various space missions. Still, no sufficient experimental setup is there to replicate the formation like a double layer in these kinds of plasma. In this study, we have made an experimental setup that nearly replicates the magnetospheric plasma environment. We have placed a stainless steel (SS) plate inside our plasma chamber. The argon plasma is produced in the hot cathode discharge method at comparatively high pressure. Then a positive bias is applied to the SS plate with and without attaching a permanent magnet. This positively biased SS plate creates a fireball and firerod-like structures in the absence and presence of the magnet, respectively. This scenario is analogous to the Earth’s magnetospheric plasma and the SS plate represents the pole of the Earth. In this plasma, we have studied the axial variation of ion density (ni
), electron temperature (Te
), electron energy distribution function (EEDF), and the plasma potential for both cases. Lastly, we have discussed the nature of the plasma potential variation with a theoretical model.