Asian Journal of Research and Reviews in Physics最新文献_第4页

Terrestrial Radiation of Some Selected Active Telecommunication Sites in Port Harcourt, Rivers State, Nigeria 尼日利亚河流州哈科特港一些选定的有效电信站点的地面辐射

Asian Journal of Research and Reviews in Physics Pub Date : 2023-04-03 DOI: 10.9734/ajr2p/2023/v7i1132

A. Orlunta, S. Sokari

{"title":"Terrestrial Radiation of Some Selected Active Telecommunication Sites in Port Harcourt, Rivers State, Nigeria","authors":"A. Orlunta, S. Sokari","doi":"10.9734/ajr2p/2023/v7i1132","DOIUrl":"https://doi.org/10.9734/ajr2p/2023/v7i1132","url":null,"abstract":"A study on terrestrial background ionization radiation was carried out around active selected telecommunications sites in Port Harcourt. This study was done using Radalert 100 and the geographical position system (GPS). The exposure rate ranged from 0.033 to 0.141 with a mean value of 0.123±0.20 (mR/h) which is lower than the acceptable limit of 0.0133 (mR/h). The absorbed dose ranged from 287.1 nG/h to 1226.7 nGy/hr with a mean value of 1066.64±1769.6 nGy/hr, which is quite higher than the acceptable limit of 89.0 nGy/h. The annual effective dose ranged between 0.44 and 1.88 mSv/y, with a mean value of 1.642.7 mSv/y which is quite higher than the safe limit of 1.0 mSv/y. The excess lifetime Cancer Risk (ELCR) varied from 1.54 x10-3 to 6.58x10-3 with a mean value of 5. 72±9.5 mSv/y. The result from this study is higher than the acceptable limit of 0.29 x10-3 as recommended by UNSCEAR. This means that people living within these areas may be exposed to cancer in later life. The effective dose of the various organs (ED Organs) are within the recommended safe limit of ICRP. The testes and the bone marrow are the most sensitive to radiation with the percentage distribution of 18.0% and 16.0%. Since the Annual effective dose, absorbed dose, and excess lifetime cancer risk are higher than the world standard, the chances of contracting cancer related illnesses are significant. It is recommended that monitoring of the exposure rate to ionizing radiation within the environment should be carried out. Also, individuals should on regular basis request for specific organ dose test.","PeriodicalId":8529,"journal":{"name":"Asian Journal of Research and Reviews in Physics","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73104341","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

Study on Electrophysical Properties in KMnO4-Doped Grade "Xorazm-150" Cotton Fibers 掺kmno4级“Xorazm-150”棉纤维电物理性能研究

Asian Journal of Research and Reviews in Physics Pub Date : 2023-03-20 DOI: 10.9734/ajr2p/2023/v7i1131

A. Mamadalimov, N. Khakimova, Sh. M. Norbekov, F. Nazarov

{"title":"Study on Electrophysical Properties in KMnO4-Doped Grade \"Xorazm-150\" Cotton Fibers","authors":"A. Mamadalimov, N. Khakimova, Sh. M. Norbekov, F. Nazarov","doi":"10.9734/ajr2p/2023/v7i1131","DOIUrl":"https://doi.org/10.9734/ajr2p/2023/v7i1131","url":null,"abstract":"The main objective of the research was to identify the semiconducting characteristics of mature medium-thick (diameter 14, 15 µm) \"Xorazm-150\" cotton fibers both undoped and doped with 1.5% aqueous solution of KMnO4, including current versus voltage and temperature dependence, temperature dependence of electrical conductivity, the influence of doping time on conductivity, and photoconductivity. The research was conducted in the temperature range (296-360 K) and the voltage range (0-100 V). The infrared spectra of the undoped and KMnO4-doped samples were studied (Both samples were mercilized with NaOH). It was found that the cotton fibers sample doped with KMnO4 had considerably higher electrical conductivity than the undoped sample. It was determined that the cotton fibers sample doped with KMnO4 obeys the law of Ohm when current flows through it. Also, it was analyzed that the formation of photoconductivity of the cotton fibers sample doped with KMnO4 under the influence of ultraviolet radiation indicates that the photoconductivity is mainly related to the formation of band electron-hole pairs. The deep surface created by doping cotton fibers with a 1.5% solution of KMnO4 in water was found to have an activation energy that was determined from the results.","PeriodicalId":8529,"journal":{"name":"Asian Journal of Research and Reviews in Physics","volume":"13 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89419315","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

Time Steps Distribution in Numerical Technique: A Comparative Analysis of Third and Fourth Order Runge-kutta Algorithms 数值技术中的时间步长分布:三阶和四阶龙格-库塔算法的比较分析

Asian Journal of Research and Reviews in Physics Pub Date : 2023-02-13 DOI: 10.9734/ajr2p/2023/v7i1130

C. Emeruwa, U. J. Ekah

引用次数: 0

Measurement and Analysis of Noise Levels: A Study of Selected Pubs in Calabar, Nigeria 噪音水平的测量和分析:尼日利亚卡拉巴选定酒吧的研究

Asian Journal of Research and Reviews in Physics Pub Date : 2023-01-05 DOI: 10.9734/ajr2p/2023/v7i1129

Emmanuel Obi, Ukoette Jeremiah Ekah, Igwe Ewona

引用次数: 0

Evaluation of Coil-Induction, Foil-Capacity and Growth in Pot Plant Batteries 盆栽植物电池线圈感应、箔容量和生长的评价

Asian Journal of Research and Reviews in Physics Pub Date : 2022-12-31 DOI: 10.9734/ajr2p/2022/v6i4127

Lena J-T Strömberg, Ali Benhmidène

引用次数: 0

Measurement and Analysis of Noise Levels: A Study of Selected Pubs in Calabar, Nigeria 噪音水平的测量和分析:尼日利亚卡拉巴选定酒吧的研究

Asian Journal of Research and Reviews in Physics Pub Date : 2022-12-31 DOI: 10.9734/ajr2p/2022/v6i4125

E. Obi, U. J. Ekah, Igwe O. Ewona

引用次数: 0

Tsallis’ Analysis of the Horizontal Component of the Earth’s Magnetic Field over India during 2002 2002年印度上空地磁场水平分量的分析

Asian Journal of Research and Reviews in Physics Pub Date : 2022-12-31 DOI: 10.9734/ajr2p/2022/v6i4128

R. Jayapal, C. Anilkumar, K. Unnikrishnan, C. Venugopal

{"title":"Tsallis’ Analysis of the Horizontal Component of the Earth’s Magnetic Field over India during 2002","authors":"R. Jayapal, C. Anilkumar, K. Unnikrishnan, C. Venugopal","doi":"10.9734/ajr2p/2022/v6i4128","DOIUrl":"https://doi.org/10.9734/ajr2p/2022/v6i4128","url":null,"abstract":"A widely used measure of entropy to quantify uncertainity in an open system is the Boltzmann-Gibbs (B-G) entropy. It, however, cannot describe non-equilibrium systems with large variability and multi-fractality. A generalisation of the B - G entropy is the Tsallis’ entropy. The values of the horizontal components of the Earth’s magnetic field, observed at various stations in India in 2002 were used. During the years 2000 – 2002, solar cycle 23 reached its maximum. Data from Ettaiyapuram (ETT, latitude = 90 10’ N, longitude = 780 01’ E, geomagnetic latitude = 0.130 N), Visakhapatnam (VIS, 170 41’ N, 830 19’ E, 8.170 N), Hyderabad (HYD, 170 25’ N, 780 33’ E, 8.170 N), Alibag (ABG, 180 37’ N, 720 52’ E, 10.020 N) and Tirunelveli (TVI, 80 42’ N, 770 48’ E, 0.320 S) were used. Using these values as inputs, we demonstrate that Tsallis’ entropy can be used to detect minor differences in the horizontal components of the geomagnetic field observed between different pairs of stations. The method is a very simple and elegant one to detect minor variations between pairs of similar signals.","PeriodicalId":8529,"journal":{"name":"Asian Journal of Research and Reviews in Physics","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89113986","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

Ab-initio Quantum Chemistry Through Computer Algebra 通过计算机代数从头算量子化学

Asian Journal of Research and Reviews in Physics Pub Date : 2022-12-30 DOI: 10.9734/ajr2p/2022/v6i4126

I. Kikuchi, Akihito Kikuchi

引用次数: 0

Calculation of Cohesive Energies of 3-D Bismuth Selenide (Bi2Se3) and Bismuth Antimony BiSb Topological Insulators: DFT Study 三维硒化铋(Bi2Se3)和铋锑铋拓扑绝缘体的内聚能计算:DFT研究

Asian Journal of Research and Reviews in Physics Pub Date : 2022-12-23 DOI: 10.9734/ajr2p/2022/v6i4124

E. Hemba, T. Ikyumbur, E. A. Trisma, F. Gbaorun, F. Aungwa

{"title":"Calculation of Cohesive Energies of 3-D Bismuth Selenide (Bi2Se3) and Bismuth Antimony BiSb Topological Insulators: DFT Study","authors":"E. Hemba, T. Ikyumbur, E. A. Trisma, F. Gbaorun, F. Aungwa","doi":"10.9734/ajr2p/2022/v6i4124","DOIUrl":"https://doi.org/10.9734/ajr2p/2022/v6i4124","url":null,"abstract":"The cohesive energies of 3-dimensional (3-D) topological insulators bismuth antimony (BiSb) and bismuth selenide (Bi2Se3) were calculated. The Fritz Haber Institute Ab-initio molecular simulations (FHI-aims) code was employed for this calculation. The output files of the FHI-aims code were used during the computation and the total energies at each number of iterations for single free atoms and bulk were then calculated. The results from this work revealed that bismuth atom becomes stable at 3rd iteration meanwhile both selenium and antimony atoms gain stability at the 5th iteration. The results also showed that bismuth antimony acquire stability at the 3rd iteration and bismuth selenide gain stability at 9th iteration. This implies that among the free atoms studied in this work bismuth atom is more stable and for the bulk bismuth antimony is more stable. The cohesive energies of BiSb and Bi2Se3 were calculated using the optimized parameters. The results obtained from the calculation of the cohesive energies in this work were 1.02eV and 1.76eV for BiSb and Bi2Se3 respectively. This results compared reasonably well with experimental results and have little percentage errors of 1.30% for bismuth antimony and 29.55% for bismuth selenide. The deviation observed in this work may be due to the DFT calculation of the solid rather than the atoms themselves.","PeriodicalId":8529,"journal":{"name":"Asian Journal of Research and Reviews in Physics","volume":"48 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77300430","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

Electrical Characterization of Chemically Grown CdS and CdTe Thin Films for Solar Cell Application 太阳能电池用化学生长CdS和CdTe薄膜的电学特性

Asian Journal of Research and Reviews in Physics Pub Date : 2022-12-21 DOI: 10.9734/ajr2p/2022/v6i4123

Mani Tsoho, A. B. Ahmed, A. Musa, Mansur Said

引用次数: 0