bluuebunny/crossref_metadata_2025_split huggingface dataset:
Performance Simulation of Thermodynamic Design for a New Turboshaft Engine
Authors: He Dongjing , Zhang Rui , Wen Cheng , Teng Jianliang 
Published: December 2023

Abstract
For a search and rescue (SAR) helicopter, the requirements of long-range and twin-engine are becoming increasingly important. In this paper, the overall performance of a new turboshaft engine for SAR helicopters is simulated. Firstly, the main performance parameters of competitor engines are collected and compared, and the thermodynamic cycle parameters of the new engine are proposed subsequently. Then, an engine model is created in Turbomatch and the overall performance of this model at the design point is calculated. Finally, the off-design performances at different conditions of output power, ambient temperature, altitudes and flight Mach numbers (Ma) are investigated. A strategy of variable stator vane (VSV) for the anti-surge control of the axial compressor is also introduced. The results of the performance simulation indicate that this engine is quite competitive with lower specific fuel consumption (SFC) and higher specific power (SP) compared to the current SAR helicopter engines.
Flow Characteristics of Gas-Liquid-Solid Three-Phase Flow in Civil Aircraft Waste System Study on Simulation Calculation
Authors: Zhang Yuying 
Published: December 2023

Abstract
The civil aircraft wastewater treatment system collects the aircraft toilet wastewater, hand washing grey water, and galley grey water into the waste water tank to solve the health and physiological needs of members on board. In this paper, taking the long branch of the waste system of civil aircraft as the research object, 1:1 modeling was carried out, and the multiphase flow of the long branch of the waste system was numerically simulated by using the CFD-DEM calculation model. The gas-liquid-solid three-phase flow form and flow characteristics of the long branch of the waste system were analyzed. The results show that under the conditions of a liquid-solid ratio of 2.5:1 and a system pressure difference of 55158 Pa, the total flow time of the solid phase is 1.6 s and the total flow time of the liquid phase is 1.95 s, which meets the design control time of 4 s for the long branch of the waste system. For the cross-sectional velocity of the pipeline, the gas velocity is greater than that of the liquid, and the liquid velocity is greater than that of the solid. The study on the flow performance of civil aircraft wastewater systems can provide theoretical support for the development of wastewater systems.
Research on Modal Test Method for Civil Aircraft Structure
Authors: Ni Junfei , Li Jun 
Published: December 2023

Abstract
In the process of civil aircraft development, it is of great significance to carry out a modal analysis of aircraft component structures and obtain modal parameters to verify whether the dynamic characteristics of aircraft structures meet the design requirements. This paper takes the structural modal of aircraft components as the research object and proposes the modal test method of aircraft structure, which provides effective modal test data support for the design and optimization of aircraft component structure.
Ppy-decorated graphene oxide: Synthesis and analysis of surface, structural and optical properties
Authors: Loyalka Swarnkesh , Dangi S. B. , Quraishi A. M. , Hashmi S. Z. , Singh Jasgurpreet , Singh A. K. , Alvi P. A. 
Published: December 2023

Abstract
Here, we have syntheized Ppy (Polypyrrole) decorated GO (graphene oxide) and investigaed its morphological and optical characteristics. For fabrication of nanocomposites, in-situ polymerization technique was used. The crystalline size and strain of the synthesised sample were determined using an X-ray diffractometer (XRD). The surface morphology of the nanocomposites was investigated using field emission scanning electron microscopy (FESEM). The optical bandgap and PL spectra of the synthesised sample were examined using a photospectrometer and photoluminescence (PL) technique. The calculated crystalline size was ~ found as 5.91 nm with strain ~ 0.33907. In PL spectra, two peaks were found at ~ 430 nm and ~ 500 nm. The direct bandgap was calculated as~ 2.22 eV (visible region). Insights into their structural and optical characteristics are gained from the synthesis and characterization of PPy decorated GO nanocomposites, opening the door for further research and application in a variety of fields.
Electrical and gamma ray shielding properties of phospho-tellurite glasses doped with alkali and transition metal oxides
Authors: Pallavi J G , Sankarappa T , Amarkumar M , Ashwini D , Mohansingh H , Aravind D , Raghavendra B 
Published: December 2023

Abstract
This article presents investigated results on physical, electrical and gamma radiation shielding properties of glasses of composition, (P2O5)0.25-(TeO2)0.5-x-(Na2O)0.1- (ZnO)0.15-(CoO)x (x= 0.10, 0.15, 0.20, 0.25, 030 and 0.35) were synthesized by melt quenching procedure. After confirming non-crystallinity, density was measured and found it to be decreased with increase of CoO concentration in the range 4.0370 gm/cm3 - 3.5673 gm/cm3. Molar volume, mean distance between TMIs, small polaron radius, oxygen packing density and field strength were estimated. Conductivity was measured in the temperature range 303K -663K. High temperature conductivity is found to be varied as per Mott’s (SPH) model. High temperature activation energy is found to be increased with CoO content. Low temperature conductivity variation has been analyzed using Mott’s (VRH) model. Gamma ray shielding parameters were evaluated using Phy-X/PSD software for the energy range 0.005 MeV-15 MeV. The mass and linear attenuation coefficients were found to decrease with CoO content and photon energy. Half and tenth value layers increased with increase of mole fractions of CoO. All the observed shielding parameters are superior to those reported previously for other glasses. The glass with x=0.10 is best suited for the utility of gamma shielding at low energy.
Coupled plasmon-LO-phonon modes in the ground state of a GaAs-based electron-electron biwire system
Authors: Puttar Devi , Rani Preeti , Verma Vishal , Garg Vinayak 
Published: December 2023

Abstract
We study the coupled plasmon-longitudinal optical-phonon (pl-LO-ph) modes in a GaAs-based electron-electron (e-e) biwire system at absolute zero within the dynamic mean-field approximation of Singwi and others (popularly known as the qSTLS theory). Here, in addition to the standard electron-electron (e-e) interactions, we also take into account the electron-phonon (e-ph) coupling and calculate pl-LO-ph modes at some selected values of wire-width, inter-wire separation and electron number density. The coupled modes are found to resonantly split into eight branches, four of which lie outside and four inside the electron-hole (e-h) pair continuum. Out of four branches which exist above the e-h pair continuum, two are plasmon-like modes having energies below than that of transverse optical (TO) phonons, and the other two are phonon-like modes having energies above longitudinal optical (LO) phonons. Additionally, we compare the plasmon-like modes with true plasmons (resulting only from the typical e-e interactions) and note that the e-ph coupling softens the true plasmon modes.
Study of Superconductivity in Restricted Quantum Chromo-Dynamics in non-Abelian Gauge Theory
Authors: Preeti  , Samandeep  , Mahajan Neelu 
Published: December 2023

Abstract
An Abelian Higgs model with dual superconductivity and confinement has been constructed and its string representation is described in terms of the average of Wilson loops in this QCD Abelian projection. Investigations has been carried out on monopole condensation and chromo-magnetic superconductivity within the framework of restricted quantum chromodynamics in the SU(2) gauge theory.
Role of site symmetry in photoluminescence spectrum of Eu2+ doped phosphors - A review
Authors: Singh Pradyuman , Nagpure I. M. 
Published: December 2023

Abstract
The role of site symmetry is one of the important parameters in the emission spectrum of the phosphor. The emission from the phosphor can be tuned due to alteration in the site symmetry by selecting appropriate synthesis procedure. The spectral shift in the emission spectrum can be achieved by variation in the coordination number (CN) or by tuning symmetry in a coordination environment. Few reported phosphors such as Eu2+ doped Ca3Mg3(PO4)4, Ba2CaMg2Si6O17 and Ca3Al2O6 where the spectral shift is noted are used in this review for the analysis.
Morphological and Optical changes with dopant concentration of Bi2O3 in Al2Bi2O6-δ nano-particulates
Authors: Ritu  , Dwivedi Sunil Kumar , Sharma Rajesh 
Published: December 2023

Abstract
In present scenario, technologies based on nanomaterials applications are taken at the top priorties because of their advanced properties. The materials have colourful size-dependent properties at nanoscale because of its significant ratio of surface area to volume. In this study, different compositions of alumina nanocrystalline materials incorporated with Bi2O3 (5%,10%,20%) were prepared by using micro wave treated (at 100°C for 15 minutes) chemical route techniques at calcination temperature of 600°C for a duration of 2 hours resulted in uniform sized nano-particulates were obtained. The ultrafine powder samples were analyzed by using techniques including UV-Vis- NIR spectrum, XRD, HRTEM, FTIR & FESEM etc. The XRD data reveals that the crystallite size of the nano crystals increased from 28.9nm (Pure alumina), 30.1nm (5% Bi2O3doped), 36.8nm (10% Bi2O3doped), 41.21 nm (20% Bi2O3doped) respectively and indicates increasing trend with dopant concentration for fixed calcination temperature of 600°C for a duration of 2 hours. The IR spectrum were deployed to examine the functional group existing in samples and concluded that corresponding IR alps were found at different wave numbers for each dopant concentration, with multiple alps/peaks attributed at 3300cm−1and at 1600cm−1were due to-OH group’s vibration mode and water content in the surroundings respectively. The alp at 1300 cm−1 was related to the adsorption of NO2 and CO2 in the surroundings and nitrate salt used for preparing the samples, while other alps at 582 cm−1 (O-Al-O) and 512 cm− 1(O-Bi-O) were related to various metal oxide vibrations. In UV-VIS spectroscopy, the tauc plot revealed that the energy band gap was 1.67 eV, 1.85eV, 2.72eV and 2.89 eV respectively. The microscopy through field emission of scanning of electron (FESEM) image displayed truncated spherical particles that were agglomerated in nature. The HRTEM findings are consistent with the results obtained from XRD data and FESEM.
Characterisation of Allium sativum bulb and its component for high end applications
Authors: Prakash Prem , Shekhar Shubhra , Prasad Kamlesh 
Published: December 2023

Abstract
This paper covers selective characterisation of garlic bulb, clove, and tunic based on phyico-chemical, nutritional, phytochemical, optical, electrical, structural, and antimicrobial characteristics of the selected promising variety, Haryana Garlic–17 (HG-17). Organosulphur and phenolic compounds are major phytochemicals attributed to have therapeutic effects. Five organosulphur and fourteen phenolic compounds were identified and qualified using High-Performance Liquid Chromatography (HPLC). These were identified to have antimicrobial capabilities against Staphylococcus aureus, Escherichia coli and Aspergillus niger. The antimicrobial characteristics of garlic extract further revealed its potential for antimicrobial and biomedical applications. The tunic or peel of garlic must be removed before its utilisation for edible purposes. Manual removal of the tunic is a cumbersome process. Therefore, the effect of sodium hydroxide (lye) as a chemical peeling agent on the characteristics of the tunic was further assessed. Treatment of tunics with lye solution improved the recovery of cellulose and hemicelluloses. The prepared garlic peel powder was found to have least one dimension in the nano range, confirmed through Field Emission-Scanning Electron Microscopic. The electrical characterisation of garlic pulp reflected a positive for ohmic heating. On the other hand, treated garlic peel behaved as a potential candidate to be used in the fabrication of paper capacitors as having the capacitance peak found to a maximum near 50Hz frequency.
Green Synthesis of Silver Nanoparticles: Their Optical and Rheological Properties
Authors: Kabiraj Atanu , Rath Satchidananda 
Published: December 2023

Abstract
The goal of this work was to investigate the green synthesis of silver nanoparticles (Ag NPs) from aqueous Propolis (P) extract, and their optical and rheological properties. Using scanning electron microscopy (SEM), Energy Dispersive X-Ray Spectroscopy (EDS) and X-ray diffraction (XRD) studies nanostructure of the prepared Ag NPs were characterized. Further, the aforementioned study suggests that Ag NPs with an average size of around 23 nm have a well-developed polycrystalline cubic structure. In the UV-Vis absorption spectra, the surface plasmon resonance (SPR) peak showed maximum absorption at 418 nm. For an excitation energy corresponding to the wavelength 410 nm, photoluminescence (PL) spectra of Ag NPs exhibited emission peak at 495 nm. To explore temperature (T) dependent flow behaviour of biosynthesized colloidal Ag NPs dispersion in deionized (DI) water, flow curve studies under shear for T= 20, 30 and 40 °C were done using rheometer. The above study illustrated that the colloidal Ag NPs follows shear thickening non-Newtonian behaviour. Moreover, viscosity decreased as temperature increased, indicating that the silver nanofluids can exhibit more rational thermal performance under high temperature conditions.
Intercalation of Lithium Atom/Ion in carbon, Silicon and Germanium Nanotubes
Authors: Chandel Surjeet Kumar , Ashutosh  , Kumar Arun 
Published: December 2023

Abstract
In this paper, we have studied the impact of Li atom/ion intercalation in C, Si and Ge nanotubes. The bond lengths for the optimized structures of the Li atoms/ions intercalation are similar and consistent with the bond lengths of pristine nanotubes. Based on Mulliken population and charge density analysis,there is a net transfer of charge from Lithium atoms to nanotube atoms. However, it is opposite in case of ion intercalation. The intercalation of Li atom/ion alters the electronic structure of the SWNTs, resulting in a shift from semiconducting to metallic. Our study also reveals that the conductance is 5G
0 for GeNT on Li atom/ion intercalation, which is 2G
0 for pristine GeNT. Due to their enhanced conductance as compared to pristine nanotubes, Li atom/ion intercalated systems can also be expected as materials for nano scale electronic devices, perfect for ballistic transport.
Molecular dynamics simulation of 100 keV argon ion radiation effects in metals and comparison with stopping and range of ions in matter code
Authors: Nargis  , Mookerjee Sumit , Nair Lekha 
Published: December 2023

Abstract
Simulation is essential to analyse radiation-induced effects because energetic ions have short transit times within materials (Ar ions of 1 keV and 100 keV have transit times of 0.29 picoseconds and 29 femtoseconds respectively, through a 25 nm Al film). The binary collision approximation (BCA) is extensively used in simulations to study damage caused by energetic ions due to its computational efficiency. Stopping and Range of Ions in Matter (SRIM), a widely used Monte Carlo software using BCA, provides accurate ion ranges consistent with experiments. Molecular dynamics simulations are powerful computational method, where classical equations of motion are solved to track atomic movements from radiation damage, but computational resources required are heavier for this method. In our current effort, the energy transfer from 100 keV Ar+ to metal targets is analysed as a function of target properties, including melting temperature and atomic density, using these two methodologies. A detailed investigation of 100 keV Ar+ ion impact on metal targets is done using the classical Molecular Dynamics simulation program ‘MDRange’, which uses the Recoil Interaction Analysis (RIA) approximation, where the interaction between the ion and its closest neighbours is considered via a two-body potential. The correlation of energy transferred to the metal with the target properties is examined considering the physical approximations of each technique.
Fusion of Stable Odd-A isotope targets with Doubly Magic 16O Projectile
Authors: Vijay  , Gautam M S , Chahal R P , Hitesh  , Kuhar S B , Duhan S , Manisha  , Khatri H 
Published: December 2023

Abstract
Fusion excitation functions of stable odd-A targets 147,149Sm with 16O projectile are theoretically analyzed within view of the symmetric-asymmetric Gaussian barrier distribution (SAGBD) formalism. For the purposes of this study, we assumed that bombardment energies of the 16O + 147,149Sm reactions would be around nominal barrier. For these reactions, Wong based computations fails to retrace the fusion data whereas SAGBD predictions fairly retrace the fusion data in entire bombarding energy range. The evaluated values of channel coupling parameter (λ) and VCBRED from SAGBD outcomes are found larger for heavier (16O + 149Sm) over lighter (16O + 149Sm) system, which suggests that heavier system possess extra fusion enhancement in sub-barrier domain. Present theoretical investigation highlights the significant contributions of intrinsic channels that emerges due to structure of reacting nuclei and such effects are empirically included in SAGBD method.
Fusion dynamics of 12C + 46,48,50Ti reactions
Authors: Kuhar S B , Gautam M S , Chahal R P , Duhan S , Khatri H , Vijay  
Published: December 2023

Abstract
Fusion dynamics of 12C + 46,48,50Ti reactions are examined by considering EDWSP and coupled channel (CC) formalism. The coupled channel outputs point out that there are significant contributions of the vibrational states of the Ti-isotopes and without taking into account of these states one cannot explain the behavior of the fusion outcomes of given reactions. The EDWSP based outputs govern barrier modifications and subsequently decreases effective fusion barrier between the participants. Because of it, EDWSP based computations consistently retrieve the fusion data of studied systems. Aforementioned models decently explored fusion behavior of given systems, which clearly reflects that barrier changing effects are appeared due to energy dependency in Woods-Saxon potential are quite similar to that of dominant channel couplings in CC approach.
Optical photon transport simulations for SiPM based PET scanner
Authors: Siwal Davinder , Anil Kumar G. 
Published: December 2023

Abstract
Positrons emitted from radioisotope quickly annihilates to two collinear photons that are captured by the array of scintillator detectors to infer about the origin of radioactivity. Coincidence collection of pair of points from the detector modules makes a line of response, their large number reveals a radioactive region of interest. Most of the medical diagnostic research is conducted with position sensitive imaging device whose performance strongly depends on the optical light collection efficiency. A versatile Lutetium–Yttrium Oxyorthosilicate (LYSO) scintillator is used to mimic the optical photon production and transport processes followed by the light collection with Silicon PhotoMultiplier sensor. Charge spectrum from a 2 × 2 × 10 mm3 single LYSO bar is obtained in GEANT4, and reproduces well the scintillation characteristics of LYSO along with photons incidence angle distribution with a single SiPM pad. This excercise is followed by the simulation performance of two PET modules comprises of 12 × 12 SiPM tile coupled with mesh of LYSO bars. The preliminarly results shows the transverse position resolution (FWHM) as 7.82 mm for a point source. Objective of this study is to search for a cheaper detector solution which will have equivalent imaging performance.
Fusion Dynamics of 27Al + 74Ge Nuclear Reaction
Authors: Hitesh  , Vijay  , Chahal R P , Kuhar S B , Duhan S , Manisha  , Khatri H , Gautam M S 
Published: December 2023

Abstract
The experimental data for the nuclear fusion of 27Al with 74Ge are examined within the context of symmetric-asymmetric Gaussian barrier distribution (SAGBD) model in sub-barrier domain. For bombarding energies smaller than the Coulomb barrier, predictions owing to simple Wong formula are found to be much smaller with reference to experimental outcomes. On other side, the SAGBD method is used, wherein impacts of inherent channels as a result of its multidimensional aspect of quantum mechanical tunneling arises because of weighted Gaussian function, to get desired outcomes. Larger fusion enhancement appears at lower energy region, which signifies the effective participation of inherent channels originated due to structure of participants. In present approach, the impacts of various inherent channels are cumulatively determined by calculating values of channel couplings parameter (λ) & VCBRED
. Present calculations due to the SAGBD method suggests that the theoretical fusion excitation functions for 27Al + 74Ge reaction are in close resemblance with experimental findings around the nominal barrier.
Fusion of 16O + 60Ni and 18O + 58Ni reactions
Authors: Samiksha  , Gautam M S , Kumar A , Vijay  
Published: December 2023

Abstract
The fusion of 16O + 60Ni and 18O + 58Ni systems are examined by opting SAGBD formalism. Wong estimations are appreciably deviated from experimental results and this suggests the importance of intrinsic channels. Therefore, influences of dominant channels for 16O + 60Ni and 18O + 58Ni in SAGBD model are empirically included via Gaussian type of weight function in Wong formula. Hence, present formalism adequately explains the fusion of 16O + 60Ni and 18O + 58Ni systems.
Study of photon shielding effectiveness of recycled environment waste Cement Kiln Dust doped Bismuth Alkali Borate glasses
Authors: Sidhu Baltej Singh , Gupta Manoj Kumar , Dhaliwal A S , Kahlon K S 
Published: December 2023

Abstract
In present communication, gamma ray protection capability of recycled environment waste Cement Kiln Dust(CKD) doped Bismuth Alkali Borate xCKD+(100-x)(65B2O3+25 Bi2O3+5Na2O+5 BaO) glasses (x= 0-30%) coded as BBCKD has been assessed in the energy range 15 keV to 15 MeV in terms of linear attenuation coefficient (LAC), mass attenuation coefficient(MAC), effective atomic number(Zeff), half value layer (HVL), mean free path (MFP), radiation protection efficiency (RPE) using Phy-X software. MAC of BBCKD glasses varies between (96.93-0.04) cm2/g and LAC between(408.77- 0.14) cm−1. Both MAC and LAC show decreasing trend from glass BBCKD1 to BBCKD5 whereas HVL and MFP show increasing effect from glass BBCKD1 to BBCKD5. Value of Zeff of BBCKD glasses varies between (80.06-31.73). Shielding effectiveness of these glasses was also examined in terms of RPE at 0.662 MeV,1.332 MeV and 2.50 MeV energy for 1.0 cm,2.5 cm and 5.0 cm thickness. Results of RPE were compared with other standard shielding materials like RS253G18, RS323G19, RS360 glass and Ilmenite-limonite (ILC), Basalt magnetite (BMC) as well as Ilmenite (IC) concretes. All BBCKD glasses exhibits better shielding capability in comparison to these conventional materials.