bluuebunny/crossref_metadata_2025_split huggingface dataset:
Research of test method for ski-jump takeoff which is based on BP neural network and multi-factor weight analysis
Authors: Liu Miaoxin , Yuan Zhengting , Liu Tao 
Published: December 2023

Abstract
Ski-jump takeoff of carrier-based aircraft is a very risky subject. At present, the principle, characteristics and influencing factors of ski-jump takeoff are mainly studied at home and abroad, but there is no relevant research on how to carry out ski-jump takeoff test and related risk control. To ensure smooth and safe ski-jump takeoff testing, this paper first determines the influencing factors of ski-jump takeoff based on the dynamics model. Secondly, based on the BP neural network, the corresponding relationship between the influencing factors, the angle of attack and the lifting speed is established. Finally, the quantitative analysis conclusion of the influencing factors is obtained according to the multi-factor weight analysis method and put forward the design method takeoff under the combined conditions of “weight-center of gravity-inertia-configuration” and the test risk control measures, which provides methods and ideas for the safety of ski-jump takeoff test.
Safety analysis of catapult takeoff of carrier-based aircraft using System-Theoretic Process Analysis method
Authors: Liu Tao , Liu Miaoxin , Jiao Xiaohui 
Published: December 2023

Abstract
Catapult takeoff has become the main way for carrier-based aircraft to take off. However, as a complex process of multi-system coupling and multi-control actions link, it is an important task to ensure the safety of catapult takeoff. Therefore, this paper adopts the System-Theoretic Process Analysis (STPA) and establishes a model of catapult takeoff using the Systems Theoretic Accident Model and Process(STAMP) model. To carry out safety analysis, identify unsafe control actions and extract the causes of unsafe behavior, simulation analysis is also carried out for typical unsafe actions. The results show that using STPA to make safety analysis, combined with simulation, can comprehensively analyze and evaluate the safety of catapult takeoff, which helps identify the risk before the flight test and reduce the flight test risk.
Engineering evaluation method for adaptability of SRM to low-temperature operation
Authors: Li Yuan , Ma Liang , Fu Dongsheng , Luo Jingqi 
Published: December 2023

Abstract
In view of the adaptability of the solid rocket motor (SRM) to work at low temperatures, an engineering evaluation method is proposed. A test method that can characterize the low-temperature ignition bearing capacity of the SRM is designed and put forward. At the same time, a comprehensive evaluation method for the adaptability of the SRM to work at low temperatures is proposed. It is combined with the numerical simulation analysis of the structural integrity of the SRM grain. The evaluation results obtained by this method are in good agreement with the SRM low-temperature test results. It can provide a basis for the reliability design and engineering development of the SRM low-temperature operation.
Two-stage calculation model of single pulse vehicle tracking target and flight track
Authors: Yang Ling , Mao Dejun , Wang Wenqiang 
Published: December 2023

Abstract
In order to get rid of the tracking of single-pulse guided aircraft, it is necessary to study its guidance method, analyze its flight and speed change laws, and deeply understand its performance. In this paper, the guided aircraft using the single-pulse working mechanism is analyzed from the flight speed change, the speed and distance changes in the flight process with time are analyzed, and the approximate calculation model is established, which is of good help for understanding the flight process of the single-pulse vehicle.
Modeling and Simulation of the Stepping Motor Operation Curve
Authors: Che Xing-bang , Zeng Hui , Zhou Kai , Xiao Han , Wang Xu-wen , Wu Xu , Li Chun-bo 
Published: December 2023

Abstract
To improve the open-loop control performance of stepper motors, research was conducted on their operating curves. The acceleration-velocity characteristic equations of three common operating curves were established and compared with the torque frequency characteristic curves of stepper motors. Based on this, an improved segmented correction fitting S-shaped (SCFS) curve design method based on a high torque utilization sine curve was proposed to solve the problem of rotor blockage and overshoot caused by uneven acceleration during the operation of stepper motors. In the simulation of the stepper motor load motion system, the SCFS curve was compared with common curves. The simulation results showed that the position tracking error was reduced by approximately 82% compared to the trapezoidal curve and approximately 70% compared to the exponential curve. Research has found that this method is suitable for the design of high-precision motor operating curves and has a high application value in the field of precision motion control.
Synthesis, structure, and photoluminescence analysis of thermally stable Sm3+ doped YPO4 phosphor
Authors: Kumar Ishant , Kumar Avinash , Kumar Sandeep , Thakur Himani , Gathania Arvind K. 
Published: December 2023

Abstract
In this manuscript, we used the coprecipitation method to manufacture Sm3+ doped YPO4. To verify the phase and structural properties of the synthesized material, we performed XRD. The diffraction patterns of the synthesized sample match the tetragonal YPO4 with no indication of an impurity peak, demonstrating the creation of a pure phase. The photoluminescence excitation and emission profiles of the synthesized material were recorded. Characteristic excitation and emission peaks of Sm3+ were observed. The distinctive orange-reddish emission of Sm3+ is found at the highest intense excitation peak (404 nm). The CIE spectral coordinates of the phosphor are (0.6080,0.3912). The emission spectra are recorded under various excitation levels. The temperature-dependent emission under 404 nm excitation is also observed to confirm the thermal stability of the synthesized material. The emission intensity drops just 13% up to 150 °C, indicating the material’s remarkable thermal stability. These findings indicate that the synthesized material is suitable for application in display devices.
Influence of Mg doping on the structural and optical properties of manganese oxide (Mn2O3) nanoparticles
Authors: Singla Samiksha , Kalra Diksha , saini Aditi , Anand Krishma , Tripathi S.K. 
Published: December 2023

Abstract
The work presents here the synthesis of pristine manganese oxide (Mn2O3) nanoparticles and magnesium (Mg) doped Mn2O3nanoparticles with the help of the chemical co-precipitation method. We have investigated the influence of Mg doping (9 wt%, 12 wt%, and 15 wt%) on the optical and structural properties of Mn2O3. The structural properties of undoped and doped Mn2O3 nanoparticles have been studied using X-ray Diffraction Spectroscopy (XRD). The numerous physiochemical bondings present within the prepared nanoparticles have been examined using Fourier Transform Infrared Spectroscopy (FTIR). Both photoluminescence (PL) and UV-Visible (UV-Vis) spectroscopy have been used to investigate the optical characteristics. All the measurements are done at room temperature. All of the samples’ absorption spectra have been investigated within the wavelength range of 200 to 800 nm. The UV-Vis absorption spectrum for pristine Mn2O3 nanoparticles shows a sharp peak at 289 nm. We have further determined the band gap of the prepared samples using Tauc’s equation. The pristine Mn2O3 exhibits a direct bandgap of 4.04eV. At an excitation wavelength of 320 nm, the prepared samples’ emission spectra have also been recorded.
Enhancement of photocatalytic activity in SrTiO3 with doping of MgO nanoparticles
Authors: Maurya Archna , Kaur Rajveer , Ghumman S S 
Published: December 2023

Abstract
In recent years, photocatalytic activity (PA) using semiconductor nanoparticles has gained attention, especially with titanium dioxide (TiO2) due to its broad activity spectrum [1-2]. There are several applications for this technique, including the purification of water, control of air pollution, and soil gradation. In the present study, trace amounts of magnesium oxide nanoparticles (MgONPs) have been doped in SrTiO3 ceramics to enhance PA. The MgONPs have been prepared using the sol-gel auto-combustion method during continuous stirring while heating at 70°C and in neutral conditions (pH=7.0). The MgONPs doped SrTiO3 ceramics with compositions of Sr1-xMgxTiO3 (x = 0.05, 0.1, and 0.15) have been synthesized by two-stage solid-state reaction at 900°C calcination and 1200°C sintering temperatures. Analyses of the samples are in progress using EDS, FESEM, XRD, and UV-visible techniques to identify the effects of doping on the structure of the samples.
Efficiency of Prevention of Biofilm Formation by Modified Polyurethane Nanofibers in Different Bacterial Strains
Authors: Khan Rumysa S , Rather Anjum H , Wani Taha U , Rafiq Muheeb , Sheikh Faheem A 
Published: December 2023

Abstract
In tissue engineering biofilm formation is a major concern where bacteria form biofilms over the implants, devices or tissue scaffolds. To prevent this biofilm formation an attempt has been made in this study by using a modified nanofiber fabricated from a polymer incorporated with an antibacterial agent. Polyurethane (PU) nanofibers provide a high surface area for efficient substance delivery within a biological surface. In this paper β-cyclodextrin (CD) incorporated PU nanofibers were fabricated by electrospinning. CD was added to impart hydrophilicity to the nanofiber mat. For the antibacterial activity silver nanoparticles (Ag NPs) have been used. In this study Ag NPs have been incorporated in the composite scaffolds by two methods, viz, physical adsorption and hydrothermal adsorption. Scanning electron microscopy showed the smooth and bead-free morphology of nanofibers. The contact angle analysis showed the lowered contact angle in case of nanofibers containing CD and Ag NPs which confirmed the increased hydrophilicity by CD. The Ag release assay showed the different release profiles in two types of composites. Ag was released slowly in case of the composite where Ag had adsorbed firmly to the nanofibers as compared to the composite where Ag was adsorbed loosely. The disc diffusion assay showed the growth inhibition of different bacterial gram-positive and gram-negative strains by the composite scaffolds. The in-vitro cell viability assay showed the cells were viable on these composites and these were usable for biological applications. This study suggests a new way of biofilm prevention using PU nanofibers.
Modification of hydrophobic electrospun polyurethane fibers for efficient wound healing activity
Authors: Rather Anjum H , Khan Rumysa S , Rafiq Muheeb , Wani Taha U , Sheikh Faheem A 
Published: December 2023

Abstract
The intricate process of wound healing demands an atmosphere that is conducive to quick healing. In this situation, creating biocompatible and antibacterial fibers may be a good choice. In this study, the unmodified polyurethane and polyurethane modified with cellulose acetate and rosemary oil were electrospun into fibers. These fibers were subsequently adsorbed using silver nanoparticles. The FE-SEM was used to characterize the fibers, revealing their defect-free morphology and the presence of nanoparticles on them. Additionally, the XRD findings demonstrated that silver nanoparticles were successfully incorporated into the spun fiber mats. The contact angle measurements indicated a decreasing behavior starting from 100.4±1° to 28.4±3° in the case of unmodified polyurethane and modified fibers. The antibacterial assay revealed that although unmodified fiber mats have negligible antibacterial action, the modified fibers exhibited considerable antibacterial activity against E. coli and S. aureus. In-vitro studies revealed that Human embryonic kidney 293T (HEK 293T) cell proliferation was enhanced on the surface of modified fibers compared to unmodified fibers. In conclusion, our research presents unique multifunctional fibrous scaffolds that are appropriate and optimal for wound healing applications.
CVD Grown Nanodimensional Semiconductor Heterostructure: Structural and Optical Properties
Authors: Kumari Priyanka , Rath Satchidananda 
Published: December 2023

Abstract
The CdSe/CdS heterostructure nanolayer thin films grown by chemical vapour deposition (CVD) technique are discussed. The morphological characterization of heterostructure is examined using scanning electron microscopy (SEM) micrographs which demonstrate the polycrystalline structure is well-developed. The structural characterization of the heterostructure using X-ray diffraction (XRD) studies reveals that the sample’s structure is hexagonal. The optical characterization has been performed using a UV-Visible spectrophotometer that might illustrate the formation of the CdSe/CdS heterostructure interface. These studies could help to design new optoelectronic devices with a high level of efficiency.
DFT investigations of a copolymer of Dimeric Pyrrole and Dimeric 3-methyl furan
Authors: Sharma S , Khare K P , Srivastava R , Kathal R , Srivastava A 
Published: December 2023

Abstract
Conducting polymers are mainly used for the electronic applications, owing to its large surface area, good environmental stability, low cost, flexibility, and simplicity in synthesis. Among the conducting polymers, Dimeric Pyrrole and its copolymers are the most widely investigated and promising for commercial applications. Copolymerization is the best route to modify the conductivity of copolymers than their host polymers. The present work investigates the stability analysis and the electronic properties in terms of the HOMO-LUMO gap, DOS plot, and the electron density of dimeric Pyrrole, dimeric 3-methylfuran, and their copolymer using a density functional theory (DFT). We observed that the stability increases as the total energy in the copolymer of dimeric Pyrrole and dimeric 3-methylfuran decreases than its host dimers. The negative total energy confirms the stability of the copolymer than its host polymers. The electron density predicted the electron behavior of the atoms present in the system. As a result, we conclude that computationally synthesized copolymer with improved stability and better electronic properties (HOMO-LUMO gap, DOS profile, and electron density), maybe a better choice for the polymeric sensors sensor for drug molecules and their metabolic intermediates.
Effect of intrinsic & Rashba spin-orbit interactions (SOI) in case of bilayer graphene
Authors: Kumari Shweta , Pratap Surender 
Published: December 2023

Abstract
In this study, we investigated how various SOI affect the properties of bilayer graphene’s energy band structure. We have considered intralayer interactions in this work. We focused on the system without biasing. We found that the intrinsic spin-orbit interaction (ISOI) can produce an energy band gap in bilayer graphene. On the other hand, in the case of an intralayer Rashba spin-orbit interaction (RSOI) different energy bands exist. The results shown depicts how the behaviour of the energy bands remains the same when we are increasing the number of atoms (N) in a unit cell of bilayer graphene.
Bidirectional Propulsion of Bioinspired Microswimmer in Microchannel at Low Reynolds Number
Authors: Chennaram  , Sharanya S. , Sonamani Singh T. 
Published: December 2023

Abstract
Swimming of micro-scale bodies is different from macro-scale counterparts due to low Reynolds number (Re) fluid-swimmer interaction. The Re is defined as the ratio of inertial force to viscous force and it can be expressed as, Re =ρ𝑣𝑙/µ, where ρ and µ are the density and viscosity of the fluid medium, v and l are the velocity and length of the swimmer. For microswimmers, due to the small length scale Re < 1, the inertial forces are negligible compared to viscous forces. Unlike the macroscale swimmers which exploit the inertial force for locomotion, microswimmers must use a different strategy to propel in low Re condition. These strategies are already available and used by microorganisms, which are perfect low Re swimmers, for example, Spermatozoon exploits their tail flexibility and anisotropic drag to swim, and E. coli bacteria use their helical tail to generate a non-reciprocal motion. By mimicking these microswimmers, researchers have developed many bioinspired microswimmers/microrobots having the potential to perform biomedical tasks like drug delivery, cell manipulation, in-situ sensing, and detoxification. Theoretical modeling and simulation of microswimmers are generally done by assuming that the microswimmer is in an infinite fluid medium, but the type of biomedical applications aimed are in confined environments with boundaries. Also, the environments are very complex, and it requires precise control and efficacy. In this paper, we present the modeling of flagellated magnetic microswimmer (inspired by Spermatozoon) in a microchannel using the finite element method. The dynamics were simulated by incorporating the complete hydrodynamic interactions (HI), that is intra-HI between the parts of the swimmer and inter-HI between the swimmer and the boundary walls of the channel. The parametric dependence analysis reveals that swimmer kinematics are dependent on the length and width of the tail, the head radius, width of the channel, and the actuation frequency of the driving magnetic field. These dependencies are explored to find a navigation control mechanism for the propulsion of microswimmer in a channel.
To study the effect of strain engineering on the band gap of BaI2 monolayer: a first principle approach
Authors: Rani Rekha , Sinha M.M. 
Published: December 2023

Abstract
Inspired by the recent proposal of improving materials performance by strain engineering, first principles calculations are performed to investigate the consequences of compressive and tensile strain on the band gap of BaI2 monolayer. Pristine monolayer is discovered to be a large band gap material with a band gap of 4.06 eV. The dynamical stability of material has been confirmed by the phonon dispersion curve which includes only real phonon mode. Calculations show that the application of strain decrease the band gap of monolayer. The effect of strain has been observed at the 4%, 8%, 12% compressive and tensile strain. The band gap has been reduced from 4.06 eV to 3.52 eV and 3.63 eV under the application of 12 % compressive and tensile strain respectively. In our knowledge the effect of strain on BaI2 monolayer has been studied for the first time and it opens new avenue to modify the properties of monolayer.
Lattice dynamics study of gold nanotube
Authors: Priyanka  , Dharamvir Keya 
Published: December 2023

Abstract
We have developed an analytical analysis based on lattice dynamics theory to study phonon dispersion relation for gold nanotube. This paper gives an overview of the methodology for calculating of phonon dispersion of gold nanotube using an example of small gold nanosheet. The dynamical matrix for the gold nanosheet was calculated using the force constants derived from Gupta Potential (GP). A better understanding of properties of gold nanotube is useful for its quick characterisation for possible applications in bio sensing, imaging etc. This work may be helpful in formulating algebra for calculating the phonon dispersion of gold nanotube and can be further used for calculating properties such as specific heat, thermal conductivity etc. at low computational cost in comparison with first principle calculations.
Environmental safety from radioactive radiation perspective-A preliminary research
Authors: Vinayak Karan Singh , Sood Aarushi , Sharma Ankit , Sandhu Kirandeep , Agrawal Paras 
Published: December 2023

Abstract
A preliminary cum. exploratory research is carried out to explore the few selected areas within Chandigarh to introspect our living and surrounding environmental conditions that whether it’s safe from radiation perspective or not. The radiation here in this paper signifies the highly energetic radioactive radiation emitted from inside the nucleus. The motivation for performing this work is to ensure the safety of living beings from the radioactive exposure. Effects of the radiation, especially in case of prolonged exposure, can be extremely dangerous or even fatal in near future if its dose limit exceeds than permissible limits. This brief investigation accounts for the background radiation manifested from natural radioactivity in building materials like gray cement or paint samples of various kinds. The study is also carried out at some critical spots in the Chandigarh city like hospitals which have radiology and radiotherapy centres, such as educational institutions (physics and chemistry labs), waste management unit, dumping ground etc. Radiation sensitive G.M counter apparatus have been used to analyse the presence and account for the presence of radiations persisting in that particular area. Henceforth, to acknowledge the radiation levels with a gas filled detection system (G.M. Counter) for that an optimal value of operating voltage is figured out. A preliminary investigation has revealed that the radiation counts/minute observed by us in the selected zones and spots is well within the permissible limits. A much systematic study with more accurate devices especially in the radiation prone areas of the country is highly required.
Nondestructive Evaluation of Fluid Characteristics using Compact Quarter-Mode SIW Resonator Sensor
Authors: Shekhar Swapnil , Kumar Kundan , Singh Surinder , Prasad Kamlesh 
Published: December 2023

Abstract
Novel compact quarter-mode (QM) substrate integrated waveguide (SIW) resonator sensor based on dielectric properties developed. The sensor works on the principle of material perturbation of the cavity resonator. It operates in the broader range of ISM frequency band to characterize various properties of pure liquids, their admixtures, and soluble solids in the solution. The sensor is excited by a 50-ohm microstrip line. A Teflon tube passes through one end of the sensor to hold the material under test (MUT). The variations in the dielectric constant of the material under test shift the resonant frequency. The simulation result shows adequate shifts in resonant frequency and dielectric constant dependent. Thus, this feature of resonate frequency shift assists in determining the component concentration, adulteration, or various properties depending on specific calibration. The findings suggest that the proposed sensor can be successfully applied to determine properties with high precision using a very small amount of fluid in a novel non-destructive approach.
Evaluation of Gamma-Ray Sensing Parameters for Some Oxides of Lanthanides
Authors: Singh Jaswinder , Dhillon Jasjot Singh , Vermani Yogesh K. , Singh Tejbir 
Published: December 2023

Abstract
We attempted to investigate gamma-ray sensing properties of selected oxides of lanthanides over wide gamma-ray spectrum. The effective atomic number (Zeff) and optimum thickness range are calculated for some oxides of rare-earth lanthanides: La2O3, Sm2O3, Eu2O3, Er2O3, Yb2O3, Lu2O3. These photon attenuation and sensing parameters were calculated using the online Py-MLBUF program. Among the lanthanide oxides investigated, lutetium oxide (Lu2O3) is found to possess higher effective atomic number and relatively smaller optimum thickness range which makes it a suitable choice for radiation sensing applications.