International Review of Physics最新文献_第2页

Using GIS and Python Language to Choose the Best School Location (Study on the Urban Areas of the Husseiniya District in Karbala Province) 基于GIS和Python语言的最佳学校选址研究(以卡尔巴拉省Husseiniya城区为例)

International Review of Physics Pub Date : 2017-08-31 DOI: 10.15866/IREPHY.V11I4.12563

N. K. Ghazal, Qusai Neama Jaleel

{"title":"Using GIS and Python Language to Choose the Best School Location (Study on the Urban Areas of the Husseiniya District in Karbala Province)","authors":"N. K. Ghazal, Qusai Neama Jaleel","doi":"10.15866/IREPHY.V11I4.12563","DOIUrl":"https://doi.org/10.15866/IREPHY.V11I4.12563","url":null,"abstract":"With the increments of the number of population nowadays, one of the most essential problems in urban areas is the number of students in each school which exceed the school capacity. Thus, it is important to increase the number of schools and to determine their suitable location. The aim of this study is to determine the most suitable sites for school by using Geographic Information System (GIS) in Husseiniya district, Karbala province, Iraq. Land classification, land slope, path distance for normal schools ( 1000), represent the main criteria used to evaluate the location suitability and the most crowded school. Schools with high number of students are calculated and evaluated using Python program. The weighted overlay tool is also employed to weight the criteria. The results demonstrate that the developed GIS 10.2 by using Python program is successfully able to determine the best school location in Husseiniya district depending on the criteria with high efficiency. The excellent performance of the developed program shows its high efficiency for best locations detection in various applications such as hospitals and universities.","PeriodicalId":448231,"journal":{"name":"International Review of Physics","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115970364","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

The Vacuum Energy Density and the Cosmological Constant. QED Beyond the Standard Description 真空能量密度和宇宙常数。超出标准描述的QED

International Review of Physics Pub Date : 2017-08-31 DOI: 10.15866/IREPHY.V10I4.10424

C. Meis

引用次数: 1

Optical Parity-Time Symmetric Structure with Vee- and Lambda-Configuration Atomic Vapors 具有v型和λ型原子蒸汽的光学宇称时间对称结构

International Review of Physics Pub Date : 2017-06-30 DOI: 10.15866/IREPHY.V11I3.12279

F. Xu, Hao Song, Jian Xu, J. Shen

引用次数: 0

Sensitivity of Convection Schemes and Microphysics in Mesoscale Simulations of Squall Line Observed During the AMMA Campaign Using the WRF Model WRF模式对AMMA活动期间飑线观测中尺度模拟中对流方案和微物理的敏感性

International Review of Physics Pub Date : 2017-06-30 DOI: 10.15866/IREPHY.V11I3.12247

Koffi Justin Kouame, F. D. B. Bouo, Y. Tchétché, D. Gbè, P. Assamoi

{"title":"Sensitivity of Convection Schemes and Microphysics in Mesoscale Simulations of Squall Line Observed During the AMMA Campaign Using the WRF Model","authors":"Koffi Justin Kouame, F. D. B. Bouo, Y. Tchétché, D. Gbè, P. Assamoi","doi":"10.15866/IREPHY.V11I3.12247","DOIUrl":"https://doi.org/10.15866/IREPHY.V11I3.12247","url":null,"abstract":"In this paper, a sensitivity study of convection schemes and cloud microphysics is performed using the Weather Research and Forecasting (WRF) model. It concerns the mesoscale simulation of the squall line observed during the African Monsoon Multidisciplinary Analysis campaign on September 22nd, 2006. Four convection schemes (Kain-Fritsch, Grell-Devenyi, Tietke and New Simplified Arakawa-Schubert) and five microphysics schemes (WRF Single-Moment 3-class (WSM3), WRF Single-Moment 5-class (WSM5), WRF Single-Moment 6-class (WSM6), Thompson and NSSL2-moment) are used. Each microphysics scheme is associated with a convection scheme, giving twenty combinations. The goal is to find the combination able to provide a realistic representation of the meteorological fields associated to the studied squall line, especially those of precipitation. The New Simplified Arakawa-Schubert convection scheme combined either with the WSM6 microphysics scheme, either with the WSM5 microphysics scheme or Thompson scheme was found to give a result closer to observation. The study also confirms that convection schemes have much more influence than microphysics on precipitation heights.","PeriodicalId":448231,"journal":{"name":"International Review of Physics","volume":"203 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122769751","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

Derivation of the Discriminated Dimensionless Numbers that Rule the Forced Mass Convection 强制质量对流的判别无量纲数的推导

International Review of Physics Pub Date : 2017-04-30 DOI: 10.15866/IREPHY.V11I2.12591

M. Conesa, F. Alhama, C. Madrid

{"title":"Derivation of the Discriminated Dimensionless Numbers that Rule the Forced Mass Convection","authors":"M. Conesa, F. Alhama, C. Madrid","doi":"10.15866/IREPHY.V11I2.12591","DOIUrl":"https://doi.org/10.15866/IREPHY.V11I2.12591","url":null,"abstract":"Discriminated dimensional analysis (DDA, hereinafter), a fundamental extension of classical dimensional analysis (CDA, hereinafter), assumes as independent quantities or physical characteristics of vector character such as length, surface, velocity, viscosity, diffusivity… As a consequence, the dimensional equations of these quantities depend on the spatial direction they are influencing on the physical phenomenon. This causes that the resulting re-grouping of variables to form the dimensionless independent groups are different according to the use of DDA or CDA. The mass transfer problem between a horizontal plate and a forced surrounding fluid is studied assuming two type of boundary conditions, isoconcentration (Diritchlet) and prescribed mass flow at the plate (Neumann). The application of the (-theorem to the set of relevant variables provides an only dimensionless group, the Schmidt number (Sc, hereinafter). To determine the unknowns (thickness of the velocity and concentration boundary layers, as well as the mass transfer coefficient) it is enough to separately introduce these variables in the relevant list of quantities. The two dimensionless groups that emerge for the three unknowns reduce to only one for the limit cases Sc >1, providing for these scenarios the order of magnitude of the unknowns, a result not given by CDA.","PeriodicalId":448231,"journal":{"name":"International Review of Physics","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116855822","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

A Research Note on a Solution of Stefan Problem with Fractional Time and Space Derivatives 具有分数时间和空间导数的Stefan问题解的研究笔记

International Review of Physics Pub Date : 2017-04-30 DOI: 10.15866/IREPHY.V11I2.12593

R. Meĭlanov, M. Shabanova, É. Akhmedov

引用次数: 2

Modeling of Granular Material Mixing Using Fractional Calculus 用分数阶微积分模拟颗粒物料混合

International Review of Physics Pub Date : 2017-02-28 DOI: 10.15866/IREPHY.V11I1.12143

Rodrigo A. Pfaffenzeller, M. Lenzi, E. Lenzi

引用次数: 1

Quasi-TEM Analysis of Electromagnetic Parameters for Different Conducting Bodies 不同导电体电磁参数的准透射电镜分析

International Review of Physics Pub Date : 2017-02-28 DOI: 10.15866/IREPHY.V11I1.12140

S. Musa, M. Sadiku

引用次数: 0

Rheoviscosimetric Study of Poly(N-isopropylacrylamide) in Water and in the Solvent Mixture (Water-Ethanol), Evidence of High Huggin’s Coefficient 聚n -异丙基丙烯酰胺在水和混合溶剂(水-乙醇)中的流变粘度测定，高哈金系数的证据

International Review of Physics Pub Date : 2016-10-31 DOI: 10.15866/IREPHY.V10I5.9363

H. Mahjoub, F. Hkiri, M. Majdoub, T. Othman

{"title":"Rheoviscosimetric Study of Poly(N-isopropylacrylamide) in Water and in the Solvent Mixture (Water-Ethanol), Evidence of High Huggin’s Coefficient","authors":"H. Mahjoub, F. Hkiri, M. Majdoub, T. Othman","doi":"10.15866/IREPHY.V10I5.9363","DOIUrl":"https://doi.org/10.15866/IREPHY.V10I5.9363","url":null,"abstract":"This paper presents a rheoviscosimetric study of a thermo-sensitive polymer, poly(N-isopropyl acrylamide) PNIPA, with weight average mass Mw = 17774 Daltons whose LCST is 32 °C. The concentration regimes in water are identified. As solvent, we first used ultra pure water then we added an organic co-solvent (ethanol) with a mass up to 20%. Under shear, the dynamic viscosity of a PNIPA solution with water as solvent versus temperature increases from a critical temperature Tmin very close to the LCST until reaching a maximum at Tmax. Kinematic viscosity measurements do not show this increase in viscosity. It is believed that by deforming the chains of the polymer and bringing the hydrophobic end groups (isopropyl) each other, the shearing causes the formation of aggregates through an inter-chain association at the time of activation of the hydrophobicity of isopropyl groups at ~ 32 °C. The authors found that the gradual addition of ethanol decreases the quality of the solvent; the intrinsic viscosity shows a decrease in the volume occupied by the chain in the solvent mixture. The Huggins coefficient kH confirms this trend by largely positive values in zone I in the presence of ethanol, therefore the authors believe that two contributions (hydrodynamic and Brownian motion) can explain the highness of kH.","PeriodicalId":448231,"journal":{"name":"International Review of Physics","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131717078","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

Calculation of Low-Frequency Magnetic Field Distribution of a Transformer Station in Stationary State 变电站稳态低频磁场分布的计算

International Review of Physics Pub Date : 2016-10-31 DOI: 10.15866/IREPHY.V10I5.12064

A. Muharemovic, V. Madžarević, H. Salkić, I. Turkovic, Nerdina Mehinović

{"title":"Calculation of Low-Frequency Magnetic Field Distribution of a Transformer Station in Stationary State","authors":"A. Muharemovic, V. Madžarević, H. Salkić, I. Turkovic, Nerdina Mehinović","doi":"10.15866/IREPHY.V10I5.12064","DOIUrl":"https://doi.org/10.15866/IREPHY.V10I5.12064","url":null,"abstract":"This paper describes one way of assessment of exposure level to electromagnetic fields of secondary electronic equipment or personnel in or close to high-voltage facilities. Assessment of fulfilling criteria regarding allowable values of magnetic flux, according regulations, was gained by numerical calculation and experimental measurement, considering geometrical configuration of high-voltage facility elements. Correct identification of electromagnetic disturbances of transmission lines has for a result optimal geometrical disposition of electronic equipment inside a high-voltage facility. Comparing a calculation results and results of experimental measuring on particular example of high-voltage facility, can lead to a conclusion that expensive measuring can be avoided, through standardization of a mathematical model and through numerical calculation of low-frequency magnetic field distribution even in conditions of the most complex geometry. Having in mind a number of locations where interaction between high-voltage facility and electronic equipment and personnel exists, a clear intention of authors, for reducing expenses of recording interaction level, is visible.","PeriodicalId":448231,"journal":{"name":"International Review of Physics","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122481924","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