Asian Journal of Research and Reviews in Physics http://journalajr2p.com/index.php/AJR2P <p style="text-align: justify;"><strong>Asian Journal of Research and Reviews in Physics</strong> aims to publish high-quality papers in all areas of 'physics'. The journal also encourages the submission of useful reports of negative results. This is a quality controlled, OPEN peer-reviewed, open access INTERNATIONAL journal.</p> en-US contact@journalajr2p.com (Asian Journal of Research and Reviews in Physics) contact@journalajr2p.com (Asian Journal of Research and Reviews in Physics) Wed, 21 Aug 2019 09:23:58 +0000 OJS 3.1.1.4 http://blogs.law.harvard.edu/tech/rss 60 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 http://journalajr2p.com/index.php/AJR2P/article/view/30106 <p><strong>Aims: </strong>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.&nbsp;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.</p> <p><strong>Study Design:</strong> 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.</p> <p><strong>Place and Duration of Study:</strong> Marche Region, East-Central Italy, between January 2000 and December 2018.</p> <p><strong>Methodology:</strong> 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.</p> <p>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).</p> <p><strong>Results:</strong> The generated dataset described in this paper consists of 228 monthly- and 19 annual-spatially distributed maps of rainfall and air temperature.</p> Marco Pellegrini ##submission.copyrightStatement## http://journalajr2p.com/index.php/AJR2P/article/view/30106 Mon, 26 Aug 2019 00:00:00 +0000 Study of Energy of Formation for FexNi1-x Liquid Binary Alloys http://journalajr2p.com/index.php/AJR2P/article/view/30105 <p>In this present study we have systematically calculated the free energy of formation for Fe<sub>x</sub>Ni<sub>1-x</sub> binary alloys at a thermodynamic state T = 1920 K. A microscopic theory bases on first order perturbation theory along with a reference hard sphere liquid has been applied. The interionic interaction is described by Bretonnet-Silbert local pseudopotential that capable of takes into account the s-d hybridization in electro-ion interaction in transition metals. The effective hard sphere diameters have been determined using linearized Weeks-Chandler-Andersen (LWCA) perturbation theory and the partial structure calculated in line with Ashcroft and Langreths original work. The calculated theoretical value and available experimental data for free energy of formation are in agreement quite satisfactorily.</p> M. S. S. Chowdhury, Mohammad A. Rashid, M. A. Rahman, A. Z. Ziauddin Ahmed ##submission.copyrightStatement## http://journalajr2p.com/index.php/AJR2P/article/view/30105 Wed, 21 Aug 2019 00:00:00 +0000 Study of (p,n) Reaction in a Wide Energy Range http://journalajr2p.com/index.php/AJR2P/article/view/30107 <p>In this paper, the quasi-elastic scattering (p, n) reactions are studied for a wide range of target nuclei <sup>13</sup>C,<sup> 14</sup>C,<sup> 48</sup>Ca,<sup> 90</sup>Zr and <sup>208</sup>Pb and different incident energies (35-160 MeV). The phenomenological Optical model potential and density independent approaches are used for these calculations in comparison with density dependent semi-microscopic approach. The density dependent parameters are modified to achieve the best calculations for many targets at different energy levels.</p> N. A. El-Nohy, M. N. El-Hammamy, S. Diab, A. M. El-Shinawy ##submission.copyrightStatement## http://journalajr2p.com/index.php/AJR2P/article/view/30107 Wed, 06 Nov 2019 00:00:00 +0000 Effect of Deformation on the Mechanical Properties of Sn-5wt%Sb Alloy http://journalajr2p.com/index.php/AJR2P/article/view/30108 <p>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.</p> Sadiq H. Khoreem, Abdo M. Meftah, T. T. Alnahari ##submission.copyrightStatement## http://journalajr2p.com/index.php/AJR2P/article/view/30108 Thu, 07 Nov 2019 00:00:00 +0000