Asian Journal of Research and Reviews in Physics最新文献_第9页

Hawking Radiations of Kerr-Newman Black Hole in de Sitter Spacetime by Hamilton-Jacobi Method 用Hamilton-Jacobi方法研究de Sitter时空中Kerr-Newman黑洞的霍金辐射

Asian Journal of Research and Reviews in Physics Pub Date : 2020-12-14 DOI: 10.9734/ajr2p/2020/v3i430128

M. I. Hossain, M. Hossain

引用次数: 0

A Phenomenological Approach to Multi-Higgs Production at High Energy 高能多重希格斯产生的现象学方法

Asian Journal of Research and Reviews in Physics Pub Date : 2020-07-22 DOI: 10.9734/ajr2p/2022/v6i130177

F. Abu-Ajamieh

引用次数: 1

Effect of Deformation on the Mechanical Properties of Sn-5wt%Sb Alloy 变形对Sn-5wt%Sb合金力学性能的影响

Asian Journal of Research and Reviews in Physics Pub Date : 2019-11-07 DOI: 10.9734/ajr2p/2019/v2i430108

Sadiq H. Khoreem, A. Meftah, T. T. Alnahari

{"title":"Effect of Deformation on the Mechanical Properties of Sn-5wt%Sb Alloy","authors":"Sadiq H. Khoreem, A. Meftah, T. T. Alnahari","doi":"10.9734/ajr2p/2019/v2i430108","DOIUrl":"https://doi.org/10.9734/ajr2p/2019/v2i430108","url":null,"abstract":"Sn–5wt%Sb is one of the materials considered for replacing Pb-bearing alloys in electronic packaging. The mechanical response of Sn–5wt% Sb solder alloy has been tested under different strain rates and three deformation temperatures. The behavior of true strain–time of Sn–5wt% Sb solder alloy has been investigated over strain rates of and deformation temperatures of 313, 333, and 353 K. Three-load creep tests were carried out at each temperature for of the wire samples to alloys. The deformation behavior and grain growth mechanism were investigated by strain-time curve analysis and microstructure observations. The results obtained show that the general characteristics of strain-time curve and microstructure of Sn-5wt% Sb alloy sensitively depend on the deformation temperature and strain rate. New free grains have been nucleated in microstructures in the process of dynamic recrystallization. These grains grow during deformation, forming coarser structure and elongation. The dynamic recrystallization and grain growth increase with increasing deformation temperature and decreasing strain rate. From the steady state creep rate the stress exponent is described in terms of the heat treatment temperatures. The stress exponent (n) were determined to clarify the deformation mechanism. Based on the n values, it is suggested that the rate controlling creep-deformation mechanism is dislocation climb. This study revealed that the solder alloy Sn–5wt%Sb have potential to give a good combination of higher creep resistance and rupture time.","PeriodicalId":8529,"journal":{"name":"Asian Journal of Research and Reviews in Physics","volume":"33 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89119536","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 of Energy of Formation for FexNi1-x Liquid Binary Alloys FexNi1-x液态二元合金的生成能研究

Asian Journal of Research and Reviews in Physics Pub Date : 2019-08-21 DOI: 10.9734/AJR2P/2019/V2I430105

M. Chowdhury, M. Rashid, M. A. Rahman, A. Z. Ahmed

引用次数: 0

Assessment of Indoor and Outdoor Background Ionizing Radiation Level in School of Marine Technology, Burutu, Delta State, Nigeria 尼日利亚三角洲州布鲁图海洋技术学校室内外本底电离辐射水平评估

Asian Journal of Research and Reviews in Physics Pub Date : 2019-07-13 DOI: 10.9734/ajr2p/2019/v2i330104

O. Esi, O. Edomi, Peter O. Odedede

{"title":"Assessment of Indoor and Outdoor Background Ionizing Radiation Level in School of Marine Technology, Burutu, Delta State, Nigeria","authors":"O. Esi, O. Edomi, Peter O. Odedede","doi":"10.9734/ajr2p/2019/v2i330104","DOIUrl":"https://doi.org/10.9734/ajr2p/2019/v2i330104","url":null,"abstract":"The ionizing radiation has the tendency of causing damage to man and its environments, hence the assessment of indoor and outdoor background ionizing radiation level in Delta State School of Marine Technology, Burutu, Delta State, Nigeria, was carried out using well calibrated and tested radiation meter (Digilert 100). The study was done in a period of ten calendar months. The purpose of this study is to obtain baseline data for indoor and outdoor Background Ionizing Radiation (BIR) level and health effect on man and the environment. For the indoor and outdoor measurement, readings were taken in three consecutive times in one location at a height of 1 meter above the ground for each point. The geographical positioning system (GPS) was equally employed in determining the coordinates of the area. The results from BIR measurement revealed that indoor readings range from 0,009 mRhr-1 to 0,019 mRhr-1 with a mean value of 0,015 mRhr-1 and for the outdoor ranges 0,010 mRhr-1 to 0,020 mRhr-1 with a mean value of 0,014 mRhr-1. The radiation health parameters calculated, for dose rate and Annual Effective Dose Equivalent (AEDE) have their mean values to be 1,135 mGyr-1 and 1,035 mGyr-1 for indoor and 0,635 mSvyr-1 and 0,145 mSvyr-1 for outdoor respectively. But the mean values of Excess Lifetime Cancer Risks (ELCR) for indoor and outdoor are 1,729 and 0,394 respectively. The deviation in BIR level and its radiological parameters are attributed to oil and gas activities in the study areas. The implication is that the area is radiologically unhealthy, the effect may not be significant but long term exposure may be dangerous. Therefore, it is imperative for radiation protection agencies to swing into regulatory action and there should be monitoring of the environment in order to reduce pollution.","PeriodicalId":8529,"journal":{"name":"Asian Journal of Research and Reviews in Physics","volume":"22 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84113959","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

Matched Filter Based Detection over Time Varying Fading Channels with Reduced Complexity 基于匹配滤波器的时变衰落信道检测降低了复杂度

Asian Journal of Research and Reviews in Physics Pub Date : 2019-07-04 DOI: 10.9734/ajr2p/2019/v2i330103

M. Israil

引用次数: 1

Open String under the Modified Born-Infeld Field 修改的born - inffield字段下的开放字符串

Asian Journal of Research and Reviews in Physics Pub Date : 2019-05-10 DOI: 10.9734/AJR2P/2019/V2I330101

Aeran Kim

引用次数: 0

On the Role of Squared Neutron Number in Reducing Nuclear Binding Energy in the Light of Electromagnetic, Weak and Nuclear Gravitational Constants – A Review 从电磁、弱和核引力常数看平方中子数在降低核结合能中的作用

Asian Journal of Research and Reviews in Physics Pub Date : 2019-05-10 DOI: 10.9734/AJR2P/2019/V2I330102

U. Seshavatharam, S. Lakshminarayana

{"title":"On the Role of Squared Neutron Number in Reducing Nuclear Binding Energy in the Light of Electromagnetic, Weak and Nuclear Gravitational Constants – A Review","authors":"U. Seshavatharam, S. Lakshminarayana","doi":"10.9734/AJR2P/2019/V2I330102","DOIUrl":"https://doi.org/10.9734/AJR2P/2019/V2I330102","url":null,"abstract":"With reference to authors recently proposed three virtual atomic gravitational constants and nuclear elementary charge, close to stable mass numbers, it is possible to show that, squared neutron number plays a major role in reducing nuclear binding energy. In this context, Z=30 onwards, ‘inverse of the strong coupling constant’, can be inferred as a representation of the maximum strength of nuclear interaction and 10.09 MeV can be considered as a characteristic nuclear binding energy coefficient. Coulombic energy coefficient being 0.695 MeV, semi empirical mass formula - volume, surface, asymmetric and pairing energy coefficients can be shown to be 15.29 MeV, 15.29 MeV, 23.16 MeV and 10.09 MeV respectively. Volume and Surface energy terms can be represented with (A-A2/3-1)*15.29 MeV. With reference to nuclear potential of 1.162 MeV and coulombic energy coefficient, close to stable mass numbers, nuclear binding energy can be fitted with two simple terms having an effective binding energy coefficient of [10.09-(1.162+0.695)/2] = 9.16 MeV. Nuclear binding energy can also be fitted with five terms having a single energy coefficient of 10.09 MeV. With further study, semi empirical mass formula can be simplified with respect to strong coupling constant.","PeriodicalId":8529,"journal":{"name":"Asian Journal of Research and Reviews in Physics","volume":"29 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89904756","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: 7

Assessment of Vegetables and Soils from Minjingu Village-Tanzania using WDXRF Technique 利用WDXRF技术评价坦桑尼亚Minjingu村蔬菜和土壤

Asian Journal of Research and Reviews in Physics Pub Date : 2019-04-12 DOI: 10.9734/AJR2P/2019/V2I330100

Yusuf I. A. Koleleni, Seriver Tafisa

{"title":"Assessment of Vegetables and Soils from Minjingu Village-Tanzania using WDXRF Technique","authors":"Yusuf I. A. Koleleni, Seriver Tafisa","doi":"10.9734/AJR2P/2019/V2I330100","DOIUrl":"https://doi.org/10.9734/AJR2P/2019/V2I330100","url":null,"abstract":"Wavelength dispersive x-ray fluorescence (WDXRF) spectrometer was used to analyze heavy metal concentration in soils and vegetables. The soil and vegetable samples were randomly collected from Minjingu village of Manyara region in Tanzania. The results indicate the soils to be contaminated with heavy metals with mean concentrations of 53±0.4 For Mn, 40±0.2 for Sr, 2059±4.2 for Fe, 760±2.7 for Al, 12±0.3 for Cs and 4±0.04 for Ni in mg/kg which was above the Maximum Tolerable Limits (MTLs). Except Cl was below MDL. While vegetables recorded the mean concentrations of 60±1.2 for Mn, 68±0.1 for Sr, 620±2.36 for Fe, 284±1,13 for Al, 56±0.5 for Cs, 13±0.1 for Ni and 714±0.7 for Cl in mg/kg. The reference and experimental results of soil and vegetables revealed that the optimized machine has given the best results, where the experimental data was very close to the reference values The reference material of soil 7 and International Atomic Energy Agency (IAEA) 395 for vegetables shows the deviation of less than 2%.The Minimum Detection Limit (MDL) for vegetables and soil of the WDXRF spectrometer was obtained under low back ground for different matrix effects. There were high correlation coefficient of heavy metals in soils and vegetables at 99% level. The findings indicate that Minjingu soils and grown vegetables were highly contaminated with heavy metals mainly from soils and polluted air, at levels able to pose detrimental health effects to the consumers. Thus need of regular monitoring of the grown vegetables around phosphate mines is recommended.","PeriodicalId":8529,"journal":{"name":"Asian Journal of Research and Reviews in Physics","volume":"150 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77525547","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

Theoretical Verification of Formula for Charge Function in Time q = c * v in RC Circuit for Charging/Discharging of Fractional & Ideal Capacitor 分数型理想电容器充放电RC电路中q = c * v时间电荷函数公式的理论验证

Asian Journal of Research and Reviews in Physics Pub Date : 2019-04-11 DOI: 10.9734/AJR2P/2019/V2I230099

S. Das

{"title":"Theoretical Verification of Formula for Charge Function in Time q = c * v in RC Circuit for Charging/Discharging of Fractional & Ideal Capacitor","authors":"S. Das","doi":"10.9734/AJR2P/2019/V2I230099","DOIUrl":"https://doi.org/10.9734/AJR2P/2019/V2I230099","url":null,"abstract":"Objective of this paper is verification of newly developed formula of charge storage in capacitor as q = c*v, in RC circuit, to get validation for ideal loss less capacitor as well as fractional order capacitors for charging and discharging cases. This new formula is different to usual and conventional way of writing capacitance multiplied by voltage to get charge stored in a capacitor i.e. q = cv. We use this new formulation i.e. q = c*v in RC circuits to verify the results that are obtained via classical circuit theory, for a case of classical loss less capacitor as well as fractional capacitor. The use of this formulation is suited for super-capacitors, as they show fractional order in their behavior. This new formula is used to get the ‘memory effect’ that is observed in self-discharging phenomena of super-capacitors-that memorizes its history of charging profile. Special emphasis is given to detailed derivational steps in order to clarity in usage of this new formula in the RC circuit examples. This paper validates the new formula of charge storage in capacitor i.e. q = c*v.","PeriodicalId":8529,"journal":{"name":"Asian Journal of Research and Reviews in Physics","volume":"112 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81333378","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