Comparison of the Optical Properties of Pure and Doped Iron-Nickel Alloys

Journal Indian Journal of Pure & Applied Physics

publisher National Institute of Science Communication and Information Resources (NISCAIR)

DOI https://doi.org/10.56042/ijpap.v62i7.8291

Issue 7

Volume 62

The pseudo ab initio ability is based on density function theory (DFT), use of generalized gradient approximation (GGA). In this work we use the Siesta code for the first time in studying this specific FeNi3 and FeNi2Pt alloys and its fcc phase which enabled us to find the structural and optical properties of FeNi3 and FeNi2Pt alloys in its fcc cubic crystal structure. Obtained results showed that the structural properties of the cubic phase structure have lattice constants very close to what was previously found in theoretical and experimental studies, and all the optical properties calculated such as absorption coefficient, reflectivity, refractive index, and the imaginary part of the dielectric constant, show that the FeNi3 and FeNi2Pt alloys They are two electrical conductors, whose valence band is completely overlapped with the conduction band. Through the optical results, it was found that we can use them in the infrared and visible region applications, and this type of work was studied in this research for the first time.

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A study electronic structure of INSB: Experiment and Theory

Journal Physics and Chemistry of Solid State

DOI https://doi.org/10.15330/pcss.25.1.73-78

Issue 1

Volume 25

The current study show the results related to investigating the Compton scattering(Cs) of Indium Antimonite (InSb). 241Am with 59.54 keV Gamm-radiations source Compton spectrometer is employed for the purpose of experimental measurement. The technique of linear combination of atomic orbitals (LCAO) is utilized within the framework of density functional theory (DFT),is used to assess the theoretical values of distributing the electron momentum density. A comparison was then made between the research findings and empirical data. Additionally, calculations employing the ionic model (IO) based on the 5p state of In and the 5p state of Sb atoms reveal that 0. 5 electrons of the state of 5pIn may have been transferred to the 5p state of Sb atoms in order to estimate the charge transfer in indium antimonite (InSb).

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A study Electronic structure of InSb: Experiment and Theory

Journal Physics and Chemistry of Solid State

publisher Vasyl Stefanyk Precarpathian National University

DOI https://doi.org/10.15330/pcss.25.1.73-78

Issue 1

Volume 25

The current study show the results related to investigating the Compton scattering (Cs) of Indium Antimonite (InSb). 241Am with 59.54 keV Gamm-radiations source Compton spectrometer is employed for the purpose of experimental measurement. The technique of linear combination of atomic orbitals (LCAO) is utilized within the framework of density functional theory (DFT), is used to assess the theoretical values of distributing the electron momentum density. A comparison was then made between the research findings and empirical data. Additionally, calculations employing the ionic model (IO) based on the 5p state of In and the 5p state of Sb atoms reveal that 0. 5 electrons of the state of 5pIn may have been transferred to the 5p state of Sb atoms in order to estimate the charge transfer in indium antimonite (InSb).

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Determination of Band Structure and Compton profiles for Aluminum-Arsenide Using Density Functional Theory

Journal East European Journal of Physics

publisher Elsevier

DOI https://doi.org/10.26565/2312-4334-2023-2-12

Issue 2

Volume 2

First-principles computations of the electrical characteristics of AlAs have been carried out using the density functional theory-DFT and the Local Density Approximation-LDA,methods (DFT) and Generalized Gradient Approximation-GGA. We utilized the CASTEP's plane wave basis set implementation for the total energy computation (originally from Cambridge Serial Total Energy Package). We used to look at the AlAs structure's structural parameter. The band gap was overestimated by the Generalized Gradient Approximation and LDA techniques, although the band gap predicted by the GGA is more in line with the experimental finding, according to the electronic structure calculation utilizing the two approximations. A semiconductor with a straight band-gap of 2.5 eV is revealed by the GGA calculation. The energy band diagram is used to calculate the total and partial densities of AlAs states. Multiple configurations of the ionic model were calculated. of Al+xAs−x (0.0 ≤ x ≤ 1) are also performed utilizing free-atom profiles. According to the ionic model, 0.75 electrons would be transferred from the valence 5p state of aluminum to the 3p state of Arsenide.

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First principles study the effect of Zn doped MgO on the energy band gap using GGA approximation

Journal Journal of Ovonic Research

publisher S.C. Virtual Company of Physics S.R.L

DOI https://doi.org/10.15251/JOR.2022.181.11

Issue 1

Volume 18

The structural, electronic, and optical properties were investigated by performing firstprinciples calculations within the framework of density functional theory (DFT) for zincsaturated magnesium oxide (ZnxMg1−x O) with different concentrations of Zn (x = 0, 0.125, 0.375 and 0.5). The crystal structure used in this calculation was the cubic MgO with a space group of Fm-3m with a 2x1x1 supercell. An increase in the zinc concentration increased the lattice parameters of ZnxMg1−x O and reduced the band gap of the material. The absorption function and refractive index were improved with increasing doping concentration of Zn in the ZnxMg1−x O compared to pure MgO. In addition, this information could provide a direction in the fabrication of a good photo catalyst material.

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Design Speech Recognition Systems in the nosily Environment by Utilizing intelligent Devices

Journal 2021 Second International Conference on Smart Technologies in Computing, Electrical and Electronics (ICSTCEE)

publisher IEEE

DOI https://doi.org/10.1109/ICSTCEE54422.2021.9708576

Volume 2021 Second International Con.

Many individuals have always found the ability to recognize human speech interesting because of the diversity of applications in virtually every industry. Improvements in human voice/speech recognition capacity and quality have been made possible via advancements in science and technology, particularly when using equipment known as a terminal. Speech recognition enables devices to alter speech data in a manner that is understandable, and this means that information has been completely identified and comprehended. The main aim of recognizing human voice is to be able to tailor information (for humans) for device use. The main goal of voice recognition systems is to allow the device to interact with the user and provide new possibilities. The growing use of intelligent terminals, as well as their substantial scientific and technological potential, calls into question the capabilities of human voice recognition in the workplace. The aim of this article is to demonstrate human speech recognition capabilities utilizing intelligent terminal devices. Also, this will primarily be investigated in the transportation (vehicle) context, where the advantages and disadvantages of these devices and concepts will be assessed.

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Electron Momentum Density of Nanoparticles ZrO2: A Compton Profile Study

Journal International Journal of Nanoscience

publisher World Scientific

DOI https://doi.org/10.1142/S0219581X21500186

Issue 2

Volume 20

This work investigates the electronic momentum density (EMD) distribution in nanosize zirconia (ZrO2) using the technique of Compton scattering. The ZrO2 nanoparticles (11.2nm) are synthesized of mechanical milling and characterized by SEM, XRD and TEM probes. The Compton profile J ( p z ) of nanoZrO2 is measured by Compton spectrometer 59.54KeV Gamma rays (Americium-241) source. The study finds out that EMD in nanoZrO2 is narrower comparing in case bulk ZrO2. This study adopts the ionic-model-based free atom J ( p z ) calculation for many configurations (Zr) + x (O − x ∕ 2 )2 ( 0 . 0 ≤ x ≤ 0 . 2 ) to measure the charge transfer (CT) on the compound formation. According to this study’s findings, CT values in these materials are ranged from 1.5 to 1.0 electrons from Zr to O atom.

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Modeling of PV system and parameter extraction based on experimental data: Review and investigation

Journal Solar Energy

publisher Elsevier

DOI https://doi.org/10.1016/j.solener.2020.02.068

Issue 1

Volume 119

This paper presents a new approach to the extraction of a single-diode five-parameter model and its performance evaluation. The proposed model can analytically describe the current–voltage (I–V) and power–voltage (P–V) characteristics of a photovoltaic (PV) module in different conditions. The PV parameters mainly identify the accuracy of any PV model. Different evaluation criteria have been used in this study. All benchmark used to compare current results accuracy with literature studies outcomes. In addition, the performance of the five parameters tested. Results of PV parameters performance showed clear improvements, which are evident in the I–V and P–V characteristics. Consequently, the proposed model introduces five accurate and flexible parameters, compared to legacy work. The extracted parameters are based on nine coefficients. Results also show the effect of the five parameters on maximum power point (MPP), short circuit current (Isc), and open circuit voltage (Voc). Furthermore, a brief review on the PV parameter extraction methods and its accuracy level has been completed.

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Measurement of Radon Radiation Concentration in Imported and Local Powdered Milk using Nuclear Track Detector CR - 39

Journal Journal of Physics: Conference Series

publisher IOPscience

DOI DOI 10.1088/1742-6596/1530/1/012133

Issue 2

Volume 1530

This study aims at measuring radon radiation in 35 different samples of local and imported powdered milk using nuclear track detector CR-39 to record the existence and impact of Alpha particles emitted from radon in the examined samples. Plastic pipes and tubes of the U type were used with the samples in radiating the detector. The study revealed that the highest concentration of radon was (1371.3) Bq.m−1 in the sample M4 (Dielac2-Dubai) and the lowest concentration is in sample M32 (Lamsa- Jordan) with a radon level (151.8) Bq.m−1. The levels of radon that were measured fall within the normal and natural concentration of the radiation that emit from the radionuclide in food and thus do not make any risk to the human life.

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In The Way of Having an Optimum Wireless Ad-Hoc Sensor Networks: Analysis of Deploying Homogeneous and Inhomogeneous Nodes

Journal ARPN Journal of Engineering and Applied Sciences

publisher Asian Research Publishing Network

DOI DOI:10.36478/jeasci.2019.10311.10317

Issue 14

Volume 8

The emerging technology of ad hoc sensor networks helped to increase researches in this field due toa large number of applications that uses wireless ad hoc networks such as monitoring of the environment, intelligent agriculture, structure health, earthquake prediction, industrial control and target detection in military applications. Various analyses have been suggested for optimality of ad hoc networks; in our study for a given number of nodes we use a comparative analysis by using two kinds of sensors network, the first network with different type of sensors having different connectivity range and sensing coverage and the other network with same capabilities for sensors in terms of connectivity and coverage range, and the aim is to have a clear view about the utility of deploying homogeneous or inhomogeneous wireless ad hoc sensor network. Analysis of sensors deployment with a homogeneous transmission range reveals better network connectivity. Therefore deploying sensor nodes with different transmission range does not improve the connectivity of the network when a power constraint present. In addition, using inhomogeneous nodes does not help to reducepower consumption to maintain network availability.

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Effects of Infrared Radiation on Escherichia coli Isolated from Appendectomy

Journal Indian Journal of Public Health Research and Development

publisher Institute of Medico-Legal

DOI https://doi.org/10.5958/0976-5506.2019.01373.1

Issue 6

Volume 10

Background: Escherichia coli belongs to the genus of Escherichia which can cause many diseases to humans including gastrointestinal diseases and appendicitis. The aims of study were to determine and evaluate the effects of infrared radiation on E. coli isolated from appendectomy. Method: In this study, we had 10 tubes contained known numbers of bacterial colonies in Nutrient Broth. These tubes were irradiated by infrared from a source emits infrared at wave length700-1200nm with 50watt ans at different exposure times, constant energy rate. Results: The results showed that the number of E. coli bacterial colonies were significantly (P<0.01) decreased at each increasing in exposure time at constant energy rate. The number of E. coli bacterial colonies died in first tube after irradiation at 10min was 11 and in the seventh tube at 70min were 110. So, all bacterial colonies died at infrared radiation wave length 700-1200nm in 150watt within 70min. We concluded that the infrared radiation can kill E. coli bacteria by stimulating oxidation, breaking chemical bonds and producing free radicals.

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A hybrid (ACO-PSO) algorithm based on maximum power point tracking and its performance improvement within shadow conditions

Journal International Journal of Engineering & Technology

publisher http://isnra.com/icemas18conference/

Issue 4.37

Volume 7

in this study, a hybrid Ant Colony Optimization-Particle Swarm Optimization (ACO-PSO) algorithm was proposed to optimally determine the maximum power point tracking (MPPT) parameters. The main goal of current study is to improve the overall performance of the MPPT system. The efforts of oscillation filtering and noise suppression were taken in this design, as well as the time response and the settling time. The proposed method is employed to track the global MPP under different shadow conditions, based on three different irradiation levels to test the ability and accuracy of the proposed method. The results of tracking MPP by the proposed MPPT technique showed that the improved method tracked the MPP for all the tested cases with a reasonable accuracy and in a very short convergence time as compared to the P&O method.

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Effect of Thermal Treatment on Some Physical and Mechanical Properties of Cermet Coating by Flame Spraying Technology

Journal journal of university of babylon pure and applied sciences

publisher university of babylon

Issue 7

Volume 26

In this research, thermal flame spraying technology was used for the purpose of producing a ceramic composite material produced from a mixture of ceramic material Al2O3, 25% and 50% with Ni-Al bonding material by 75% and 50% respectively, Coating through tests. The paint was made of graphite after it was tarnished by teething method. The spraying distance was 12 cm. The thermal treatment of the coated samples was at 1000 ولفت and for a period of two hours only. Through the tests of porosity, hardness and x-ray resistance, it was found that the best ratio of ceramic coating was in the ratio (50% alumina) with (50% of the bonding material). Where the best porosity was about 50% of the alumina and of the bond material as it reached 10.52%, the best hardness was also at 50% of the alumina and 50% of the bonding material as it reached 47.48Hv, the thermal treatment helped reduce the porosity to 7.44% and increased the hardness to 56.22Hv at the rate of 50% of the alumina and 50% of the bonding material, Finally the thermal treatment at (1000 ℃ ) and for two hours helped improve the crystalline uniformity at the angles of diffraction of defects.

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Electronic Structure of Copper Antimony Using Compton Scattering Technique

Journal Baghdad Science Journal

publisher College of Science for Women, University of Baghdad, Iraq.

DOI https://doi.org/10.21123/bsj.2016.13.1.0167

Issue 13

Volume 1

In this paper we present the first ever measured experimental electron momentum density of Cu2Sb at an intermediate resolution (0.6 a.u.) using 59.54 keV 241Am Compton spectrometer. The measurements are compared with the theoretical Compton profiles using density function theory (DFT) within a linear combination of an atomic orbitals (LCAO) method. In DFT calculation, Perdew-Burke-Ernzerhof (PBE) scheme is employed to treat correlation whereas exchange is included by following the Becke scheme. It is seen that various approximations within LCAO-DFT show relatively better agreement with the experimental Compton data. Ionic model calculations for a number of configurations (Cu+x/2)2(Sb-x) (0.0≤x≤2.0) are also performed utilizing free atom profiles, the ionic model suggests transfer of 2.0 electrons per Cu atom from 4s state to 5p state of Sb.

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Compton profile and charge transfer of CaCl2

Journal Kirkuk University Journal /Scientific Studies

publisher Kirkuk University

Issue 3

Volume 10

The purpose of the present work study the experimental of electron momentum density for CaCl2 which is measured for the first time by imploying 100mCi 241Am Compton spectrometer. To compare experimental momentum densities the Compton profiles has been studied using Hartree–Fock within linear combination of atomic orbitals(LCAO) and simple ionic model. The experimental isotropic profiles are found to be relatively in better agreement with the Hartree–Fock data. To evaluate the charge transfer the ionic model for number of configuration of (Ca+x)(Cl-x/2)2 has been used to estimate the charge transfer on compound formation. This model supports transfer of 0.5 electrons from 4S state of each Ca Atom to 3P State of Cl2.

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Surface Roughening of Poly (methyl-methacrylate) Membranes by SF6-Glow-Discharge Plasma Etching

Journal Tikrit Journal of Pure Science

publisher Tikrit University

DOI DOI:10.25130/tjps.v20i2.1174

Issue 2

Volume 20

The (100 μm) thick of high density Polymethylmethacrylate PMMA membranes were prepared by solution cast method and treated by (42 W), low pressure, DC-discharge, SF6-Plasma for different exposure time: 10,30,60 and 80 min. The observed changes in membranes surface properties have been characterized by Scanning Electron Microscopy(SEM).The optical properties for plasma treated membranes has been characterized by UV-Visible Spectroscopy. The chemical structure changes have been characterized by Fourier Transformation Infrared Spectroscopy (FTIR).The (SEM) results indicates to significant changes in surface morphology of the polymer membranes after plasma treatment. The UV-Visible spectroscopy results shows clearly reduction of light transmission due to plasma treatment, also the (FTIR) results shows the changes in molecular bonds for polymer chains in surface structure of polymer membranes

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Analysis of the electronic structure of ZrO2 by Compton spectroscopy

Journal Journal of Experimental and Theoretical Physics

publisher Springer US

DOI DOI:10.1134/S1063776113060204

Issue 1

Volume 117

the electronic structure of ZrO2 is studied using the Compton scattering technique. The first-ever Compton profile measurement on polycrystalline ZrO2 was obtained using 59.54 keV gamma-rays emanating from the 241Am radioisotope. To explain the experimental data, we compute theoretical Compton profile values using the method of linear combination of atomic orbitals in the framework of density functional theory. The correlation scheme proposed by Perdew-Burke-Ernzerhof and the exchange scheme of Becke are considered. The ionic-model-based calculations for a number of configurations, i.e., Zr+x(O−x/2)2 (0 ≤ x ≤ 2), are also performed to estimate the charge transfer on compound formation, and the study supports transfer of 1.5 electrons from Zr to O atoms

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Electronic structure of CaCO3: A Compton scattering study

Journal Applied Radiation and Isotopes

publisher Elsevier

DOI https://doi.org/10.1016/j.apradiso.2012.10.006

Issue 1

Volume 72

In the present work, we have studied electron momentum density of CaCO3 using a Compton scattering technique. The experiment has been performed using a 100 mCi 241Am (59.54 keV) Compton spectrometer. The experimental data have been interpreted in terms of theoretical Compton profiles. To compute the theoretical momentum densities, energy bands and density of states, we have used linear combination of atomic orbitals method as embodied in CRYSTAL09 code. We have used local density approximation, generalized gradient approximation (GGA) and second order GGA (SOGGA) within the frame work of density functional theory. It is seen that the GGA gives a better agreement with the experimental data than other approximations. We have also discussed the energy bands and density of states of CaCO3.

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