bluuebunny/crossref_metadata_2025_split huggingface dataset:
Mode transition in a helium barrier discharge with oxygen admixtures: insights into a micro cavity plasma array reactor
Authors: Steuer David , van Impel Henrik , Labenski Robin , Schulz-von der Gathen Volker , Böke Marc , Golda Judith 
Published: December 2024

Abstract
Dielectric barrier discharges (DBDs) offer great potential for applications such as volatile organic compounds (VOCs) conversion or plasma catalysis. For many of these applications, an admixture of molecular oxygen is important, for example, to oxidize the gases to be treated. However, oxygen addition can lead to a drastic change in discharge dynamics, which may affect conversion efficiency. The discharge may transition to a filamentary mode, which could influence plasma chemical processes or in extreme cases potentially damage the reactor. This study investigates the discharge mode of a micro cavity plasma array operated at atmospheric pressure with a helium flow (1–2 slm) containing small oxygen admixtures (0%–5%). A multitude of parameters as voltage, current, power, and emission are investigated for characterization. Additionally, the electric field, mean electron energy and atomic oxygen density are examined depending on the oxygen admixture. With pure helium, a homogeneous atmospheric pressure glow discharge is observed, appearing as a quasi-continuous glow discharge. With small oxygen admixtures (0.1%–1%), individual discharge pulses become visible, though they remain separated (pseudo glow discharge). At higher oxygen admixtures (

⩾

1%), a mode transition to a filamentary discharge is observed. The measurements indicate that the discharge mode, especially the individual discharge pulses, has a significant impact on conversion efficiency. This knowledge can help in the future to fine-tune the discharge mode using external parameters such as voltage waveform or frequency to optimize conversion efficiency.
Single production of singlet vector-like leptons at the ILC
Authors: Yue Chong-Xing , Wang Yue-Qi , Sun Xiao-Chen , Li Xin-Yang 
Published: December 2024

Abstract
Vector-like leptons (VLLs), as one kind of interesting new particle, can produce a rich phenomenology in low- and high-energy experiments. In the framework of the singlet vector-like lepton with scalar (VLS) model, we investigate the discovery potential of the VLL via its single production at the International Linear Collider (ILC) with a center of mass energy

s

=

1 TeV and an integrated luminosity

L

= 1 ab
−1, taking into account the appropriate polarization. For the signal and standard model (SM) background analysis, we have considered two kinds of decay channels for the W boson, i.e. pure leptonic and fully hadronic decay channels. Our analytic results show that the parameter space M

F
∈ [300, 675] GeV and κ ∈ [0.0294, 0.1] might be detected by the proposed ILC for a pure leptonic decay channel. For a fully hadronic decay channel, a larger detection region of the parameter space isderived as M

F
∈ [300, 700] GeV and κ ∈ [0.0264, 0.0941].
Effects of two-body currents in the one-particle one-hole electromagnetic responses within a relativistic model
Authors: Franco-Munoz T , González-Jiménez R , Udías J M 
Published: December 2024

Abstract
Longitudinal (R
L) and transverse (R
T) responses from inclusive electron scattering from 12C and 40Ca nuclei are computed within a fully relativistic model, and one- and two-body current operators leading to a final one-particle one-hole state. We find that the two-body contributions have no effect on R
L but they increase R
T by up to 30%, depending on the energy and momentum transfer. Inclusive cross sections have also been computed, obtaining an increase which depends on the degree of transversity of each kinematic. The comparison with carbon data is good for the responses and the cross sections. In the case of calcium, while the model compares well with the cross section data, the agreement with the responses is generally poor. However, the inconsistencies between different data sets for the separate responses in this nucleus indicate that uncertainties in the responses are largely underestimated in the data. Our calculation is fully relativistic, does not require a factorized model and includes a full quantum mechanical description of both the initial and final nucleon states. We also show that incorporating the distortion of the nucleons while making the initial and final states orthogonal is essential to reproduce the shape and magnitude of the cross section data and carbon responses. The good agreement with the electron scattering experimental data supports the use of this approach to describe the analogous neutrino-induced scattering reaction.
Structural and dielectric properties of green synthesized SnO2 nanoparticles
Authors: Ebied Mostafa Saad , El-sadek M S Abd , Salwa A S 
Published: December 2024

Abstract
The present research study provides an analysis of the structural and dielectric characteristics of SnO2 nanoparticles (SnO2-NPs) synthesized by the green synthesis approach. Powder x-ray diffraction (PXRD) investigation indicates the existence of a single tetragonal phase with the P42/mnm space group. The crystallite size and lattice strain of the tetragonal SnO2-NPs were determined through x-ray peak broadening analysis. The average crystallite size calculated by high-resolution transmission electron microscopy (HR-TEM) was 16 nm. Fourier transform infrared spectroscopy (FTIR) within the 530 to 644 cm−1 range confirms the vibration modes of Sn-O-Sn and Sn-O. The vibrational modes observed in the Raman spectra confirm the tetragonal rutile-type structure of the synthesized SnO2-NPs. The dielectric characteristics of SnO2-NPs were investigated within a temperature range of 353–433 K and a frequency range of 50 Hz –5 MHz. The total conductivity exhibits frequency dependence according to Jonscher’s power law

(
σ

t

ω

=

σ

dc

+
A

ω

s

)

. The correlated barrier hopping (CBH) model is found to be the dominant conduction mechanism in the studied material. The direct current (DC) conductivity appears to be thermally activated, with an activation energy of 307 mev. The analysis of dielectric characteristics demonstrated that the real (ε′) and imaginary (ε″) parts of the dielectric constant drop with frequency and increase with temperature. The dielectric modulus indicates the presence of non-Debye relaxation within the material. The relaxation time, based on the analysis of the imaginary component of the modulus (M″), follows the Arrhenius equation. An equivalent-circuit model was used to analyze the impedance spectroscopy results, which indicated the existence of a temperature-dependent electrical relaxation phenomena of the non-Debye nature.
A comparative study of 14N and 16O projectiles on 148Nd target at low energy through experimental analysis
Authors: Chhura Lupteindu , Singh Dharmendra , Mahato Amritraj , Sharma Nitin , Sahoo Rajesh K , Mahato Rahul , Giri Pankaj K , Linda Sneha B , Kumar Harish , Tali Suhail A , Afzal Ansari M , Ali Rahbar , Kumar R , Muralithar S , Singh R P 
Published: December 2024

Abstract
One of the standout techniques that is stack foil activation technique has been used to calculate excitation functions of evaporation residues formed in the reaction of 14N projectile with 148Nd target at beam energy ≈ 4 − 7 MeV/nucleon in this research. The analysis of presently calculated cross sections with standard theoretical tool PACE4 shows the population of xn/pxn channels through complete fusion only, while the α-emitting channels were found to populate through incomplete fusion as well as complete fusion. These results suggest the breakup of 14N as α + 10B results in incomplete fusion. A connection tied to the collective impact of total asymmetry and total deformation was examined including the asymmetry and deformation effects of both the projectile and the target. Two separate standard reduction methods have been used to reduce the cross-sections of complete fusion and total fusion for present system 14N + 148Nd and earlier measured system 16O + 148Nd, which reveals that 16O induced reactions have more incomplete fusion probability than that of 14N. A suppression in complete fusion functions has been noted for systems 14N + 148Nd and 16O + 148Nd when compared to universal fusion function. It can be inferred from the varying values of suppression factors of 14N and 16O that the possibility of α-breakup differs for 14N and 16O. Moreover, the total fusion functions for 14N + 148Nd and 16O + 148Nd show strong alignment with the universal fusion function.
The investigation of main electrical parameters, energy dependent profiles of surface states and their lifetimes in the Au/n-Si Schottky diodes with (PVA-Fe3O4) interlayer depend on frequency and voltage
Authors: Yıldız K , Khalkhali A , Uzun A , Erbilen Tanrıkulu E , Altındal Yerişkin S , Arslan Alsaç A 
Published: December 2024

Abstract
In this article, the impedance-voltage-frequency (Z-V-f) measurements of the fabricated Au/(PVA-Fe3O4)/n-Si SDs have been performed between 0.1 kHz and 1 MHz, and in the ±3 V range. Main important electronic parameters of the Schottky diode (SD) like diffusion - potential (VD), Fermi - energy (EF), barrier - height (ΦB), depletion layer (WD), and max. electric field (Em) were extracted from the reverse bias 1/C2 - V plots in a wide frequency range. The voltage-reliant variations of the surface states (Nss) have been calculated by using low—high frequency capacitance (CLF-CHF), and parallel conductance or admittance models and compared to each other. The voltage-reliant resistance profile of Ri has also been obtained from the Nicollian & Brews method for all frequencies. All these results indicate that these main electrical parameters are strongly dependent on voltage and frequency due to the existence of Nss, their lifetimes (τ), interfacial organic layer, Rs, interface, and dipole polarizations. But, while Nss is effective, both in depletion and inversion regions, Rs is dominant at the strong-accumulation region at high enough frequency.
Re-examination of the β-decay properties of As isotopes
Authors: Kabir Abdul , Nabi Jameel-Un , Khalid Wajeeha , Almujibah Hamad 
Published: December 2024

Abstract
The β-decay properties of 67−80As nuclei have been investigated within the framework of the proton–neutron quasi-particle random phase approximation (pn-QRPA) model. The nuclear deformation obtained from the finite range droplet model is used as an input parameter in the pn-QRPA model for the analysis of β-decay properties including Gamow–Teller strength distributions, log ft, β-decay half-lives and stellar β
± decay rates. The predicted log ft values were fairly consistent with the observed data. The computed β-decay half-lives matched the measured values by a factor of 10. The stellar rates were compared with the shell model outcomes. At high densities and temperatures, the β
+ and electron capture rates had a finite contribution. However, the β
− and positron capture rates are only significant at high temperatures and low densities. The pn-QRPA rates outperformed the shell model rates by a factor of 22 or more.
Tearing stable stationary ITER baseline operation in DIII-D
Authors: Bardóczi L. , Dudkovskaia A. , Logan N.C. , Richner N.J. , Brown A.C. , Callen J.D. , La Haye R.J. , Strait E.J. 
Published: December 2024

Abstract
We present a tearing stable, stationary and reproducible operating solution for DIII-D plasmas characterized by the ITER baseline scenario normalized parameter set and shape. In these plasmas low differential rotation (

Δ

f

1
,
2

) between the core and edge is identified as the single root cause of the onset of the primary limiting instability, the 2,1 Neoclassical Tearing Mode (NTM), while a group of other examined parameters have a much weaker impact on the stability. Explanation is offered by drift kinetic simulations, which show a six-fold reduction in the NTM onset threshold due to diminished stabilizing ion polarization currents when the seed island drift frequency ceases in the local plasma frame. Based on the experimental observation and the explanation provided by the theory, a new discharge program is developed to sustain

Δ

f

1
,
2

by modifying the edge neoclassical potential through neutral gas fueling. This method enables stationary ITER baseline operation free of disruptive 2,1 tearing modes.
Study on Variation of Wood Bending Properties among Trees of Taxodium Ascendens Plantation
Authors: Xu Youming , He Na , Li Qiang , Lin Han 
Published: December 2024

Abstract
In wood structural design, the modulus of elasticity (MOE) and modulus of rupture (MOR) are two key indexes of wood mechanical properties. In this study, Taxodium ascendens. Brongn plantation grown in terrestrial site were selected for the research material to study variation patterns of wood flexural elastic modulus and wood bending strength within-tree and among-trees. The results showed that the flexural modulus of elasticity and flexural strength for Taxodium ascendens increased first in radial direction from pith to bark, then to flatten out. Their longitudinal variation pattern showed increasing pattern first from the base of the trunk upward and then tended to flatten out too. Their average values were 5004 MPa in flexural modulus of elasticity and 65.3 MPa in flexural strength (bending strength or modulus of rupture) respectively. The mean values of flexural modulus of elasticity and flexural strength of Taxodium ascendens varied in the ranges of 4643 MPa to 5523 MPa and 57.0 MPa to 70.4 MPa, respectively. The mean values of flexural modulus and flexural strength were smallest at the base and the highest at breast height, when the age of the specimens within trees was more than 20 years old. The flexural modulus of elasticity and flexural strength of Taxodium ascendens varied significantly among trees. There was a highly significant positive correlation between MOE and MOR. According to the China grading standards of wood physical and mechanical properties, (Wood mechanical grade I is below 7.4 GPa in MOE and grade II is below 54.1 MPa∼88.0 MPa in MOR), the wood bending strength of Taxodium Ascendens is small and weak. Its wood is not suitable for structural material with high strength.
Simulated Weld HAZ Impact Toughness of 700 MPa Ultra-low Carbon Bainitic Steel
Authors: Xue Haichao , Luan Shoucheng , Sun Junsheng , Shi Bin 
Published: December 2024

Abstract
Ultra-low carbon bainitic steel is a kind of high strength and high toughness steel with ultra-low carbon, high cleanliness and ultra-fine grain characteristics. In this paper, the welding thermal simulation technology is used to study the influence law of 700MPa ultra-low carbon bainitic steel B700 welding thermal process on the microstructure and properties of its CGHAZ. The results show that CGHAZ with a peak temperature of 1350 °C and a t8/5 of 15 s can obtain higher impact toughness. The impact toughness of HAZ with a peak temperature of 950°C is higher. The secondary thermal cycles with peak temperatures of 1150°C and 950°C significantly improved the impact toughness of CGHAZ, and the former improvement was better than the latter.
Atmospheric Pressure Nitrogen Corona Discharge and Its Application in Hydrophilicity Modification of Polypropylene Fibber Surfaces
Authors: Yang Guangda , Zhang Fuzi , Zhang Hongfei , Pang Yongjiao , Xu Qingyi 
Published: December 2024

Abstract
We discussed the mechanism of the generation of two kinds of active particles that generated by pulsed corona discharge. We recorded and discussed the experimental results of the modification of the surface hydrophilicity of PP fibber. The experimental results showed that pulsed voltage and pulse repetition rate can cause the distribution of OH and

N

2

+

active particles. The intensity of the active particles is larger at the needle high voltage electrode and at the plate electrode, and will decrease when comes to the middle. When plasma modification treatment is short, the water contact angle at PP fibber surface decreases rapidly. That means the plasma treatment enhanced PP surface hydrophilicity. But when the treatment time is longer, the active particles can cause damage of the PP fibber surface.
Preparation and Properties of Alumina Fiber Reinforced LTCC Ceramic Coatings
Authors: Luo Lida , Su Qi , Han Huimin , Wang Qingwei 
Published: December 2024

Abstract
Low temperature co-fired ceramic technology (LTCC) uses multi-layer laminated firing process to realize the high density packaging of complex circuits and passive devices, which provides a new solution for the miniaturization and high integration of passive devices, and plays an important role in national defense, communication and other fields. As the bearing structure of the functional circuit, LTCC substrate plays the dual role of structural support and electrical shielding, which is the key to the development of LTCC technology. In this study, the CaO-MgO-B2O3-SiO2 (CMBS) system, identified for its significant developmental prospects, is chosen as the subject of investigation and the influence of Al2O3 fiber reinforcement on the mechanical and dielectric properties of LTCC substrate materials is studied. The results show that the substrate can stably co-sinter with Ag. With the increase in Al2O3 ceramic fiber content, both the elastic modulus and microhardness of the substrate increase overall. The dielectric constant ranges from 4 to 4.65, exhibiting an initial increase followed by a decrease with the addition of Al2O3 ceramic fibers, conforming to the requirements of low dielectric constant and low dielectric loss, meeting the requirements of low dielectric constant and low dielectric loss.
Research on Energy saving Technology of Circulating Cooling Water System in Central Air Conditioning System
Authors: Chen Xiao , Liu Wei , Chen Hongyao , Gu Zhipan , Hou Jingxin , Li Jiasheng , Zou Dongjin , Deng Liyuan , Fang Mingyu , Li Yan , Li Mengjie 
Published: December 2024

Abstract
In summer, hot and humid, high temperature time is long, the proportion of air conditioning energy consumption in hotel buildings is high, hotel building energy consumption is large, and energy saving potential is large in hot summer and cold winter zones. Simulation calculation of air conditioning and domestic hot water load characteristics of a hotel, and analysis of the relationship between hot water load and air conditioning condensation heat. This system uses a heat exchanger to heat the water inlet of the air-conditioning condensing hot water boiler to achieve waste heat utilization. The selection of heat exchangers and the volume of hot water storage tanks was studied, and the system was designed and calculated. The system was analyzed from energy saving and environmental characteristics. The results show that the waste heat recovery efficiency η
1 = 97.84%, the waste heat recovery energy saving rate η
2 = 32.6%, and the daily recoverable heat 2228.4 KWh. When the amount of water entering the tower and the environmental meteorological parameters remain unchanged, the evaporation loss of the cooling tower decreases significantly with the decrease of the temperature of the water entering the tower. The evaporation rate can be reduced by 0.172% when the inlet water temperature is reduced by 1°C. And it can reduce the gas boiler gas consumption, a refrigeration season can reduce 52462.4 kg CO2 emissions. The research results have significant energy-saving and emission reduction effects, and can achieve considerable social and environmental benefits.
Distribution of Se in Se-rich Stagnic Anthrosols of Hainan Island
Authors: Xiao Zhaoxia , Wang Xiuhua , He Cuicui , Wang Tingzhong , Wang Hua 
Published: December 2024

Abstract
The continuous decrease in soil pH in Hainan has become a limiting factor for Se uptake by rice in Se rich areas due to the decrease in soil Se availability caused by soil acidification in stagnic anthrosols. Analyze the basic soil properties, chemical composition, and Se content of stagnic anthrosols in Hainan’s Se-rich area, in response to the phenomenon of continuous and slow acidification of stagnic anthrosols. The main research results show that the soil pH in the Se-rich areas of Hainan is generally acidic, with an average soil pH of 5.0. The Se content in the stagnic anthrosols is 0.373 mg/kg. The spatial distribution range of Se content in the stagnic anthrosols in the area is wide, and the selenium content at different layers is significantly correlated.
Study on the Effect of Organic Fertilizer Made from kitchen Waste on Soil Nutrients
Authors: Wang Zhenhua , Yin Yumin , Bi Yanliang , Liu Liyuan , Wang Zihao , Wu Juan 
Published: December 2024

Abstract
In the study, the changes of nutrients in the soil during spinach planting were determined through pot comparison experiment, and the effects of the application of kitchen waste fertilizer on the growth of spinach were studied. The results of the study were that the application of fermentation products could regulate the soil pH. When the food waste application increased, the reduction of organic matter in soil also increased, the maximum reduction being 56.6% compared with 0d. The alkali-hydrolyzed nitrogen and available phosphorus content in soil increased first and then decreased, and the content of available potassium also increased as it was used increasingly after the spinach harvest. The results indicated that the use of kitchen waste fertilizer could efficiently increase the nutrient content in soil, adjust the soil pH, and increase the absorption and utilization rate of organic components of spinach.
A Study on the Arableland Soil Nutrient Distribution of Shanlan Upland Rice Growing Area
Authors: Huang Haijie , He Cuicui , Xiao Zhaoxia 
Published: December 2024

Abstract
Cultivated land resources not only provide living security for agricultural population, but also serve an important basis for social stability. To elucidate the distribution of soil nutrients in cultivated land and identify the main factors affecting the quality of cultivated land are the important basis and premise for improving soil quality and exploring ways of sustainable utilization. Based on the soil samples of arableland in Hainan Shanlan upland rice growing area, the soil nutrient contents were analyzed to clarify the soil nutrient distribution in the area. The results showed that the average pH of cultivated soil in the area was 5.8, and the cultivated soil was weakly acidic. The overall low content of soil organic matter is mainly attributed to climate factors and agricultural production habits, and the content of soil available nitrogen, phosphorus and potassium nutrients is at or close to the appropriate range. The content of trace elements (available calcium, available magnesium, available copper, available zinc) in the cultivated soil is relatively rich, and the main source of trace elements in the cultivated soil is the weathering of parent material, and the content differences between towns are relatively small.