Asian Journal of Research and Reviews in Physics最新文献_第10页

A Play with Four Virtual Gravitational Constants Associated with the Four Basic Interactions 与四种基本相互作用相关的四个虚拟引力常数的游戏

Asian Journal of Research and Reviews in Physics Pub Date : 2019-04-10 DOI: 10.9734/ajr2p/2019/v2i230098

U. Seshavatharam, S. Lakshminarayana

引用次数: 1

An Outline Picture of a Growing and Rotating Planck Universe with Emerging Dark Foam 一个生长和旋转的普朗克宇宙的轮廓图，其中出现了黑暗泡沫

Asian Journal of Research and Reviews in Physics Pub Date : 2019-04-02 DOI: 10.9734/AJR2P/2019/V2I230097

U. Seshavatharam, S. Lakshminarayana

引用次数: 3

Investigation of Radio-frequency Power Density Distribution around GSM Mast in Keffi Town, Nigeria 尼日利亚Keffi镇GSM基站周围射频功率密度分布调查

Asian Journal of Research and Reviews in Physics Pub Date : 2019-03-15 DOI: 10.9734/AJR2P/2019/V2I230094

U. Ibrahim, Musa Mohammed, I. Mustapha, A. Mundi, Idris Yahaya

{"title":"Investigation of Radio-frequency Power Density Distribution around GSM Mast in Keffi Town, Nigeria","authors":"U. Ibrahim, Musa Mohammed, I. Mustapha, A. Mundi, Idris Yahaya","doi":"10.9734/AJR2P/2019/V2I230094","DOIUrl":"https://doi.org/10.9734/AJR2P/2019/V2I230094","url":null,"abstract":"In this study, an investigation of radiofrequency power density distribution around GSM mast in Keffi town, Nigeria was determined. Radiofrequency meter (Electrosmog ED- 155A) was used to measure the EM radiation at 50, 70, 90,110, 130, 150, 170, and 190 m away from mobile base stations. A total of fifteen mobile base stations were randomly selected in Keffi town covering about four network providers (MTN, Globacom, Etisalat, and Airtel), according to their proximity to buildings, number of antennas mounted on their masts, how close they are to other base stations and the population density around them.The result reveal that MBS5 was found to have the highest value of average power density compared to that of the remainder, with a contribution of about 16% (2908.38 µW/m2). The least contribution was recorded in MBS3 with only about 1% (173.71 μW/m2). The other MBS with significant contribution are MBS6 (15%), MBS11 (15%), MBS10 (13%), MBS8 (13%) and MBS13 (11%) with average power densities of 2878.72μW/m2, 2767.28μW/m2, 2385.43 μW/m2, 2382.70 μW/m2, and 1996.36 μW/m2 respectively. The findings reveal that the measured values of power densities across all the sites are well below the RF radiation exposure safety limit set by International Commission on Non-ionizing Radiation Protection (ICNIRP) when compared with the findings in this study. Therefore, RF radiation exposure from mobile base stations in Keffi town may pose no health risk to the people living within the area.","PeriodicalId":8529,"journal":{"name":"Asian Journal of Research and Reviews in Physics","volume":"54 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91106884","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: 2

Geoelectrical Investigation of Subsurface Structures for Mapping Groundwater Potential of Joseph Ayo Babalola University Campus Environment, Ikeji Arakeji, Osun State, Southwestern Nigeria Joseph Ayo Babalola大学校园环境地下结构的地电学研究，尼日利亚西南部Osun州Ikeji Arakeji

Asian Journal of Research and Reviews in Physics Pub Date : 2019-03-13 DOI: 10.9734/AJR2P/2019/V2I230092

O. Odeyemi, O. Odeyemi, S. A. Owolabi, E. A. Mamukuyomi, R. A. Salako

{"title":"Geoelectrical Investigation of Subsurface Structures for Mapping Groundwater Potential of Joseph Ayo Babalola University Campus Environment, Ikeji Arakeji, Osun State, Southwestern Nigeria","authors":"O. Odeyemi, O. Odeyemi, S. A. Owolabi, E. A. Mamukuyomi, R. A. Salako","doi":"10.9734/AJR2P/2019/V2I230092","DOIUrl":"https://doi.org/10.9734/AJR2P/2019/V2I230092","url":null,"abstract":"Owing to fast increase in number of staff and students of Joseph Ayo Babalola University, Ikeji Arakeji, Southwestern Nigeria, it is therefore very important to carry out this research in order to recommend the actual locations where boreholes can be sunk for good potential yields of groundwater when the time comes. The aim of this research is to carry out vertical electrical sounding geophysical survey at study area with a view to determining good aquifers that are good for the accumulation of groundwater. The study area is located between latitude 0820225 m to 0820345 m (UTM) Northings and longitude 717320 m to 717450 m (UTM) Eastings. Schlumberger electrode array was employed for the study using Ohmega Resistivity meter for the data acquisition. The geoelectric survey of the study area comprised of twelve vertical electrical soundings, with maximum current electrode spacing (AB) of 100 m. The modeled curves are mainly KH-type. The geoelectric sections generated from the sounding curves revealed 4 major layers earth models. The topsoil is made up of clay, clayey sand/lateritic sand with resistivity and thicknesses varying from 54.7 – 210.1ohm-m and 0.2 –0.8m respectively. The second layer is the lateritic clay with resistivities and thicknesses varying from 334 – 963ohm-m and 1.5 – 10.8m respectively. The third layer constitutes the clay / sandy fractured quartzite and it serves as the aquifer unit. The resistivity values lie between 71.7 and 498 ohm-m while the thicknesses vary from 2.1 – 76.3 m. The fourth layer is the fractured/presumably fresh basement bedrock with the resistivity varying from 1879 – 13991.8 ohm-m. Areas characterized with fractured basement of low resistivity with appreciable thickness are therefore recommended for the siting of boreholes. It is concluded that the vertical electrical sounding points of the study area are good aquifers for groundwater accumulation.","PeriodicalId":8529,"journal":{"name":"Asian Journal of Research and Reviews in Physics","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90092904","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

Theoretical Verification of the Formula of Charge Function in Time of Capacitor (q = c*v) for Few Cases of Excitation Voltage 几种激励电压情况下电容器(q = c*v)电荷随时间变化公式的理论验证

Asian Journal of Research and Reviews in Physics Pub Date : 2019-03-12 DOI: 10.9734/AJR2P/2019/V2I130091

S. Das

{"title":"Theoretical Verification of the Formula of Charge Function in Time of Capacitor (q = c*v) for Few Cases of Excitation Voltage","authors":"S. Das","doi":"10.9734/AJR2P/2019/V2I130091","DOIUrl":"https://doi.org/10.9734/AJR2P/2019/V2I130091","url":null,"abstract":"We have a developed and derived a formula for capacitor i.e. charge as a function of time, which is convolution operation of time varying capacity function and time-varying voltage function. This is different to the usual and conventional way of writing capacitance multiplied by voltage to get charge stored in a capacitor. This new deliberation with convolution operation works well for classical capacitors (i.e. ideal loss less capacitors), that is of a constant capacity at all frequencies, and also for a time varying capacity function given by decaying power-law: that gives the formation of a fractional capacitor. In this paper, we use this developed new charge storage expression and apply to various types of inputs excitation voltage-sinusoidal, step, ramp voltage and then analyze and interpret the results for charge stored, the current expressions, the loss-tangent and the memory effects. With this new formulation, we also evaluate impedance function of a classical capacitor as well as a fractional capacitor, and also elaborate on the Nyquist’s diagram, that is employed to study various dielectric materials via impedance spectroscopy. This new approach of charge storage concept is yet to be practically as well as theoretically applied-though some initial work has started. This paper gives a theoretical validity test i.e. analytically obtained in several applications for this new formulation, of charge storage formula. This paper will be useful in various super-capacitor studies, dielectric relaxation experiments, and impedance spectroscopy for various material developments for electrical energy storage missions; however, this concept is yet to be used to its full potential.","PeriodicalId":8529,"journal":{"name":"Asian Journal of Research and Reviews in Physics","volume":"17 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84772388","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: 2

Scaled-up Analysis of Surface Refractivity across West Africa 西非地区地表折射率的放大分析

Asian Journal of Research and Reviews in Physics Pub Date : 2019-02-15 DOI: 10.9734/AJR2P/2019/V2I130090

O. Ajileye

引用次数: 0

In vitro UV-Visible and FTIR Spectroscopy Study of Low Power He-Ne Laser Irradiation on Human Blood 低功率氦氖激光辐照人体血液的体外紫外可见及红外光谱研究

Asian Journal of Research and Reviews in Physics Pub Date : 2019-02-01 DOI: 10.9734/AJR2P/2019/V2I130087

Mohammed Ali Haimid, A. Marouf, M. Abdalla

{"title":"In vitro UV-Visible and FTIR Spectroscopy Study of Low Power He-Ne Laser Irradiation on Human Blood","authors":"Mohammed Ali Haimid, A. Marouf, M. Abdalla","doi":"10.9734/AJR2P/2019/V2I130087","DOIUrl":"https://doi.org/10.9734/AJR2P/2019/V2I130087","url":null,"abstract":"Laser irradiation has biostimulating effect in various cell types low power laser radiation is used clinically for skin and vascular disorders. \u0000Aims: To investigate the effect of (He-Ne) laser (λ= 632nm, power=1mW) on human whole blood, after irradiated to different times from 10 min to 50 min. \u0000Study Design: Human Whole Blood Irradiated to (He-Ne) laser(λ= 632nm, power=1mW). \u0000Place and Duration of Study: Soba Hospital, Khartoum- Sudan, Institute of Laser, Sudan University of science and technology (SUST), February 2018. \u0000Methodology: Blood samples were taken from healthy volunteers; blood sample irradiated to (He-Ne) laser and control compared; FTIR and UV-Vis spectrophotometer were used to study laser radiation effect \u0000Results: FTIR spectra and UV-vis absorption spectra of blood samples are compared before and after irradiated to He-Ne laser shows increases absorption for 10, and 40 min but it decreases as the exposure time at 30,20 and 50 minutes. This fluctuation of light absorption is known as a biphasic response. \u0000FTIR spectra of non exposed blood showed the peaks due to O-H (free group), C=O (amide I group), N=O (nitro group), and C-H (aromatic group). N-H (Amino acid (amide II). For all exposure time He-Ne laser (λ= 632nm, power=1mW) irradiation, showed significant changes. Increased in transmittance at different exposure time for all groups (C=O, O-H, N=O, C-O & C-H, N-H) and indicates significant decreasing in their concentration. \u0000Conclusion: The laser radiation causes changes in the structure and conformational changes in the polypeptide and absorption of blood samples decreased due to increasing ligand electronegativity.","PeriodicalId":8529,"journal":{"name":"Asian Journal of Research and Reviews in Physics","volume":"48 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90716858","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: 2

A Theoretical Investigation on Sound Transmission Loss through Multi-walled Plates with Air Space 带空气空间的多壁板传声损失的理论研究

Asian Journal of Research and Reviews in Physics Pub Date : 2019-01-23 DOI: 10.9734/AJR2P/2019/V2I129801

T. Natsuki, Jun Natsuki

引用次数: 1

Diffuse Reflectance of Powders 粉末的漫反射

Asian Journal of Research and Reviews in Physics Pub Date : 2019-01-22 DOI: 10.9734/AJR2P/2019/V2I129799

D. Radjenović, Biljana Stojičić, B. Radjenovic, M. Radmilović-Radjenović

引用次数: 1

A 19-Years Period (2000-2018) Dataset of Annual and Monthly Spatial Distribution of Rainfall and Average Air Temperature in a Temperate Region for Climate Change Studies 气候变化研究用19 A(2000-2018)温带降水和平均气温年月空间分布数据集

Asian Journal of Research and Reviews in Physics Pub Date : 2019-01-01 DOI: 10.9734/ajr2p/2019/v2i430106

Marco O. O. Pellegrini

{"title":"A 19-Years Period (2000-2018) Dataset of Annual and Monthly Spatial Distribution of Rainfall and Average Air Temperature in a Temperate Region for Climate Change Studies","authors":"Marco O. O. Pellegrini","doi":"10.9734/ajr2p/2019/v2i430106","DOIUrl":"https://doi.org/10.9734/ajr2p/2019/v2i430106","url":null,"abstract":"Aims: Temperature changes in the air, land and ocean together with the hydrological cycle and changing precipitation patterns are some of the topics assessed by scientist all over the world in order to study the signals of a changing climate. As the impacts of climate change are expected to be noticed both at global and local scale, a dataset of real-world precipitation and average air temperature at regional scale spanning a period of 19 years is provided and described in the present paper. Study Design: Starting from cumulative precipitation and average air temperature data, a set of annual and monthly spatially distributed maps have been generated in order to provide the scientific community with regional-scale data related to a temperate climate area. Place and Duration of Study: Marche Region, East-Central Italy, between January 2000 and December 2018. Methodology: We used in-situ rainfall and air temperature data provided by Marche Region (Italy) Security and Civil Protection Department in the framework of the regional meteorological and hydrological monitoring network (SIRMIP). SIRMIP network is composed of a mechanical and a telemetric sensing system. SIRMIP network consists of, among others, 230 rain gauges and 137 thermometers. Rainfall and air temperature data have been interpolated on a 1 km-resolution regular grid using Inverse Distance Weighting (IDW) spatial interpolation. Temperature data were further processed through a linear regression using elevation from a high-resolution digital terrain model (DTM). Results: The generated dataset described in this paper consists of 228 monthly- and 19 annual-spatially distributed maps of rainfall and air temperature.","PeriodicalId":8529,"journal":{"name":"Asian Journal of Research and Reviews in Physics","volume":"76 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81032077","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: 3