Asian Journal of Research and Reviews in Physics最新文献_第7页

Nuclear Structure of Ce Nuclei within Interacting Boson Model-2 相互作用玻色子模型-2中Ce原子核的核结构

Asian Journal of Research and Reviews in Physics Pub Date : 2021-12-22 DOI: 10.9734/ajr2p/2021/v5i330165

Ali N. Sabbar, S. N. Abood

引用次数: 0

Magnetic Characterization of Co and Zn Nano Ferrites: Property Consideration for Oil-Spill Clean Up Co和Zn纳米铁氧体的磁性表征:对溢油清理性能的考虑

Asian Journal of Research and Reviews in Physics Pub Date : 2021-12-20 DOI: 10.9734/ajr2p/2021/v5i330164

A. Musa, M. A. Muhammad, N. M. Maharaz, A. Gidado

{"title":"Magnetic Characterization of Co and Zn Nano Ferrites: Property Consideration for Oil-Spill Clean Up","authors":"A. Musa, M. A. Muhammad, N. M. Maharaz, A. Gidado","doi":"10.9734/ajr2p/2021/v5i330164","DOIUrl":"https://doi.org/10.9734/ajr2p/2021/v5i330164","url":null,"abstract":"Nano-magnetic particles are significantly finding applications in environmental remediation. This work studied the magnetic properties of Co and Zn nano-ferrites, CoFe2O4 and ZnFe2O4 respectively, with considerations for the properties that are desirable for oil spill cleanup. The ferrite nanoparticles were synthesized by the glycol-thermal method at 200 ºC for 6 hours using a stirred pressure reactor. Single phase spinel crystal structures were obtained for both samples as determined by an X-ray diffraction (XRD) machine. The high-resolution transmission electron microscope and surface electron microscope images showed nano structures. The magnetic properties and magnetic hyperfine parameters were determined using a lakeshore vibrating sample magnetometer and 57Fe Mössbauer spectroscopy. The XRD peaks were consistent with that of a single phase spinel structure. No impurity phase was detected. The nano-ferrites have crystallite sizes of about 10 nm and 17 nm for CoFe2O4 and ZnFe2O4. The nano almost-spherical nature of the samples was also confirmed from their morphology studies. The saturation magnetization of CoFe2O4 and ZnFe2O4 were about 50 emu/g and 30 emu/g respectively. They both exhibited superparamagnetic properties with a component of para-magnetism observed in ZnFe2O4 nano-ferrites. CoFe2O4 nano-ferrites exhibited better desired property for oil spill cleanup. The ZnFe2O4 nano-ferrites showed tendencies of slow response to magnetic field, however, it is more environmentally friendly. The magnetic hyperfine parameters and the isomer shift values for CoFe2O4 and ZnFe2O4 showed strong internal magnetic fields and the obtained values are consistent with spinel structure. The oxidation state of Fe was observed to be Fe3+. Due to the low coercivity and high magnetization values, these particles could be considered as potential candidates for oil spill cleanup. These desirable magnetic properties will improve the recyclability of the nanoparticles using low applied magnetic fields.","PeriodicalId":8529,"journal":{"name":"Asian Journal of Research and Reviews in Physics","volume":"30 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88828839","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Assessment of Activity Concentration of Radionuclides in Soil and Cassava Food Crop from Solid Mineral Mining Site in Ishiagu, Ivo L.G.A of Ebonyi State, Nigeria 尼日利亚Ebonyi州Ivo L.G.A Ishiagu固体矿物矿区土壤和木薯粮食作物放射性核素活性浓度评估

Asian Journal of Research and Reviews in Physics Pub Date : 2021-12-14 DOI: 10.9734/ajr2p/2021/v5i330163

C. Mgbeokwere, C. Ononugbo, A. Bubu

引用次数: 1

Theoretical Study of Solvent Effects on the Electronic and Thermodynamic Properties of Tetrathiafulvalene (TTF) Molecule Based on DFT 基于DFT的溶剂对四噻吩(TTF)分子电子和热力学性质影响的理论研究

Asian Journal of Research and Reviews in Physics Pub Date : 2021-12-13 DOI: 10.9734/ajr2p/2021/v5i230162

R. Muhammad, N. M. Mahraz, A. Gidado, A. Musa

{"title":"Theoretical Study of Solvent Effects on the Electronic and Thermodynamic Properties of Tetrathiafulvalene (TTF) Molecule Based on DFT","authors":"R. Muhammad, N. M. Mahraz, A. Gidado, A. Musa","doi":"10.9734/ajr2p/2021/v5i230162","DOIUrl":"https://doi.org/10.9734/ajr2p/2021/v5i230162","url":null,"abstract":"Tetrathiafulvalene () is an organosulfur compound used in the production of molecular devices such as switches, sensors, nonlinear optical devices and rectifiers. In this work, a theoretical study on the effects of solvent on TTF molecule was investigated and reported based on Density Functional Theory (DFT) as implemented in Gaussian 03 package using B3LYP/6-31++G(d,p) basis set. Different solvents were introduced as a bridge to investigate their effects on the electronic structure. The HUMO, LUMO, energy gap, global chemical index, thermodynamic properties, NLO and DOS analysis of the TTF molecule in order to determine the reactivity and stability of the molecule were obtained. The results obtained showed that the solvents have effects on the electronic and non-linear-optical properties of the molecule. The optimized bond length revealed that the molecule has strong bond in gas phase with smallest bond length of about 1.0834Å than in the rest of the solvents. It was observed that the molecule is more stable in acetonitrile with HOMO-LUMO gap and chemical hardness of 3.6373eV and 1.8187eV respectively. This indicates that the energy gap and chemical hardness of TTF molecule increases with the increase in polarity and dielectric constant of the solvents. The computed results agreed with the results in the literature. The thermodynamics and NLO properties calculation also indicated that TTF molecule has highest value of specific heat capacity (Cv), total dipole moment () and first order hyperpolarizability () in acetonitrile, while acetone has the highest value of entropy and toluene has a slightly higher value of zero point vibrational energy (ZPVE) than the rest of the solvents. The results show that careful selection of the solvents and basis sets can tune the frontier molecular orbital energy gap of the molecule and can be used for molecular device applications.","PeriodicalId":8529,"journal":{"name":"Asian Journal of Research and Reviews in Physics","volume":"142 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89029913","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Assessment of Outdoor Gamma Exposure Level of Some Swampy Agricultural Soils of Nasarawa West, Nigeria 尼日利亚纳西拉瓦西部一些沼泽农业土壤室外伽马暴露水平评估

Asian Journal of Research and Reviews in Physics Pub Date : 2021-11-24 DOI: 10.9734/ajr2p/2021/v5i230160

Abdullahi A. Mundi, I. Mustapha, Rabo Maikeffi

{"title":"Assessment of Outdoor Gamma Exposure Level of Some Swampy Agricultural Soils of Nasarawa West, Nigeria","authors":"Abdullahi A. Mundi, I. Mustapha, Rabo Maikeffi","doi":"10.9734/ajr2p/2021/v5i230160","DOIUrl":"https://doi.org/10.9734/ajr2p/2021/v5i230160","url":null,"abstract":"In this study, assessment of outdoor background exposure levels in some selected swampy agricultural soil in Nasarawa West, Nigeria has been conducted. An in-situ measurement of outdoor background exposure rate (in mRhr-1) for a total of fifty farms (ten each from Keffi (KF), Kokona (KK), Karu (KR), Toto (TT), and Nasarawa (NS)) were done using a well calibrated portable halogen-quenched Geiger Muller (GM) detector (Inspector alert Nuclear radiation monitor SN:3544). A geographical positioning system (GPS) was used at an elevation of 1.0 m above ground level to obtain the geographical location. The radiological hazard parameters were evaluated using the measured outdoor background exposure rates. The values obtained were compared with recommended permissible limits to ascertain the radiological hazard status of the swampy agricultural farms. The mean values of the outdoor background exposure levels (0.23, 0.038, 0.028, 0.022, and 0.039 mRh-1), absorbed dose rates (458.49, 334.95, 188.79, 194.01, and 343.65 nGyh-1) and excess lifetime cancer risk (1.968, 1438, 0.810, 0.832, and 1.475) each for KF, KK, KR, TT, and NS respectively, are higher than the recommended safe limits of 0.013 mRh-1, 84.0 nGyh-1, 0.00029 respectively as recommended by UNSCEAR and ICRP. On the other hand, the mean annual effective dose equivalent (AEDE) values (0.563, 0.410, 0.232, 0.238, and 0.421 mSvy-1 for KF, KK, KR, TT, and NS respectively) are below the recommended permissible limits of 1.00 mSvy-1 for general public exposure. Generally, the study revealed that swampy agricultural soils in Nasarawa west are radiologically safe with little contamination which could be attributed to the geological formation and partly due to human activity in the area.","PeriodicalId":8529,"journal":{"name":"Asian Journal of Research and Reviews in Physics","volume":"169 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76253466","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Holographic Dark Energy and Dark Matter Interaction in Anisotropic Bianchi Type-V Universe 各向异性Bianchi v型宇宙中的全息暗能量和暗物质相互作用

Asian Journal of Research and Reviews in Physics Pub Date : 2021-11-23 DOI: 10.1134/S0202289319010049

D. Gemici-Deveci, E. Aydiner

引用次数: 0

Numerical Simulation of One Step Block Method for Treatment of Second Order Forced Motions in Mass-Spring Systems 处理质量-弹簧系统二阶强迫运动的一步块法数值模拟

Asian Journal of Research and Reviews in Physics Pub Date : 2021-10-01 DOI: 10.9734/ajr2p/2021/v5i230157

J. Sabo, T. Kyagya, W. J. Vashawa

引用次数: 0

Numerical Study of Transparent Conductive Oxide (TCO) Layer on the Performance of Methyl-Ammonium Tin Iodide (CH3NH3SnI3) Perovskite Solar Cells Using SCAPS 透明导电氧化物(TCO)层对甲基铵碘化锡(CH3NH3SnI3)钙钛矿太阳能电池性能的影响

Asian Journal of Research and Reviews in Physics Pub Date : 2021-09-30 DOI: 10.9734/ajr2p/2021/v5i130156

Faruk Sani, S. Abdullahi

{"title":"Numerical Study of Transparent Conductive Oxide (TCO) Layer on the Performance of Methyl-Ammonium Tin Iodide (CH3NH3SnI3) Perovskite Solar Cells Using SCAPS","authors":"Faruk Sani, S. Abdullahi","doi":"10.9734/ajr2p/2021/v5i130156","DOIUrl":"https://doi.org/10.9734/ajr2p/2021/v5i130156","url":null,"abstract":"Substrates used in perovskite solar cells as front contact are usually transparent conductive oxide (TCO) to allow light to pass through the device. The dominating TCO employed in perovskite solar cells are indium-doped tin oxide (ITO) and fluorine-doped tin oxide (FTO). However, it is imperative to investigate alternative TCOs due to the scarcity of indium metal, relatively low electrical conductivity and high leakage current in ITO and FTO. In this study, simulation has been carried out using Solar Capacitance Simulator (SCAPS) to investigate the efficiency of methyl-ammonium tin iodide (CH3NH3SnI3) based solar cells including various TCOs such as boron-doped zinc oxide (BZO), molybdenum trioxide (MoO3) and zinc oxide (ZnO). TCO parameters such as thickness, donor concentration and operating temperature were varied to study their influence on device performance. The best device performance was achieved using MoO3 with power conversion efficiency of 25.83 % and Jsc, Voc and FF of 32.44 mA/cm2, 0.979 V and 81.38 % respectively. The work shows the potential of fabricating an improved CH3NH3SnI3 perovskite solar cell with MoO3 as front contact.","PeriodicalId":8529,"journal":{"name":"Asian Journal of Research and Reviews in Physics","volume":"43 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89683985","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design Analysis and Implementation of Automatic Fire Extinguishing System Using ATmega16 Microcontroller as Control ATmega16单片机控制的自动灭火系统设计分析与实现

Asian Journal of Research and Reviews in Physics Pub Date : 2021-09-24 DOI: 10.9734/ajr2p/2021/v5i130155

Rilwanu Bello, Bashir Abdullahi Sama, Nura Gambo, Yusuf M. Ahijo

{"title":"Design Analysis and Implementation of Automatic Fire Extinguishing System Using ATmega16 Microcontroller as Control","authors":"Rilwanu Bello, Bashir Abdullahi Sama, Nura Gambo, Yusuf M. Ahijo","doi":"10.9734/ajr2p/2021/v5i130155","DOIUrl":"https://doi.org/10.9734/ajr2p/2021/v5i130155","url":null,"abstract":"Aim: The aim of this research is to design an automatic fire detection and control. \u0000Methodology: The system consists of two sensors, microcontroller, buzzer and a pump/sprinkler. An LM35 integrated chip has been used as temperature sensor while MQ-2 gas sensor has been used as smoke sensor. All sensors are connected to the microcontroller through an input/output port. The controlling software for the whole system was designed in C programming language. The popular high performance, low power 8-bit microcontroller from the AVR family microcontrollers has been used. The system was finally tested by introducing fire parameters (smoke and temperature) close to the smoke and temperature detectors respectively. When the parameters go above the set level in the detectors, audio alarm, light indicator and pump/sprinkler were activated. The measured temperature of the system was compared with the reference temperature. \u0000Results: The result showed that there was a mean deviation of 1.550C between the measured values and reference values which served as the control. \u0000Conclusion: The constructed system is compact and easy to install. The constructed fire control device is quite cheap and affordable to every category of person.","PeriodicalId":8529,"journal":{"name":"Asian Journal of Research and Reviews in Physics","volume":"76 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72897683","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Design Analysis of 7.5KW Stand Alone Solar Photovoltaic Power System for an Intermediate Household 某中等户用7.5KW独立太阳能光伏发电系统设计分析

Asian Journal of Research and Reviews in Physics Pub Date : 2021-09-22 DOI: 10.9734/ajr2p/2021/v5i130154

Rilwanu Bello, Taufiq Suleiman, Usman Atiku Kende, Mohammed Abulrasheed

{"title":"Design Analysis of 7.5KW Stand Alone Solar Photovoltaic Power System for an Intermediate Household","authors":"Rilwanu Bello, Taufiq Suleiman, Usman Atiku Kende, Mohammed Abulrasheed","doi":"10.9734/ajr2p/2021/v5i130154","DOIUrl":"https://doi.org/10.9734/ajr2p/2021/v5i130154","url":null,"abstract":"Aim: Design Analysis of 7.5KW Stand-alone Solar Photovoltaic Power System for an Intermediate Household. \u0000Methodology: A design analysis of standalone 7.5KW PV system was carried out using PV modeling equations based on load estimated. The analyzed data of the solar photovoltaic components was used to determine the estimated output power of 7.5KW. Therefore, a number of modeling equations and methodologies for designing a PV system based on application have been developed and simplified in order to ensure the optimum performance of the system. The analyzed solar powered 7.5KW system was achieved by designing 24 solar panels of 335W each, 16 deep cycle battery of 200A each, and a pulse width modulation (PWM) charge controller of 60A to monitor the output of the battery for safety operation. The battery will be connected to the inverter circuit (DC-AC) to generate 220V alternating current in its output via a step-up transformer. In this paper, design analysis of a standalone PV system enables of producing power to a household with approximate consumption of 7.5KW was conducted. \u0000Results: The standalone PV system along with the cost implications was analysed and designed. In this analysis a sequential design plan of an independent standalone solar powered photovoltaic structure was analysed and overviewed to supply continuous and uninterrupted power to a typical utility with maximum power consumption of 7500W (7.5KVA). The calculated/computed values of all the components yield a result that can serve the purpose. Based on the design analysis, the result implies that the estimate consumption of 7.5KW in a day requires 24 PV panels of 335 Watts each, 16 (12V, 200Ah) batteries, 10KW inverter, (12V, 60A) charge controller and copper wire of cross-sectional area (1.688mm2) for installation. \u0000Conclusion: In Nigeria, to generate a solar power of 7.5KVA requires almost $15,585.70 which is equivalent to N 5,965,426.66.","PeriodicalId":8529,"journal":{"name":"Asian Journal of Research and Reviews in Physics","volume":"36 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74446189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1