فهرس المقالات Mechanical features

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  1 - Exploring elastic mechanics and radiation shielding efficacy in neodymium(III)-enhanced zinc tellurite glasses: A theoretical and applied physics perspective
  Hesham M. H. Zakaly Yasser S. Rammah Shams A. M. Issa Nouf Almousa Adel M. El-Refaey Mohamed Said Shams
  10.57647/J.JTAP.2023.1704.44
  The present work scrutinizes the radiation protection features and mechanical characteristics of neodymium zinc-tellurite of composition [(TeO2)70-(ZnO)30]1-x (Nd2O3)x: x= 0-5 mol% in steps of 1 (TZNd1 5). The MakishimaMackenzie's model was adopted for the computation أکثر

  The present work scrutinizes the radiation protection features and mechanical characteristics of neodymium zinc-tellurite of composition [(TeO2)70-(ZnO)30]1-x (Nd2O3)x: x= 0-5 mol% in steps of 1 (TZNd1 5). The MakishimaMackenzie's model was adopted for the computation of the Poisson's ratio (PR) and elastic moduli. WinXcom and EXABCal software's were performed to evaluate the radiation shielding parameters and buildup factors, respectively of TZNd-glasses. Results revealed that the increasing of Nd2O3 concentration in TZNd-glasses from 1 to 5 mol% had a positive effect on their elastic parameters: Young's modulus increased from 53.13 to 54.81GPa, bulk modulus changed from 31.95-33.65 GPa, and the PR varied from 0.222 to 0.228 for TZNd1 to TZNd5. There was a small increase in the Z/A as the Nd content increased, which leads to slight increase in TMSP of the particles. The mass attenuation coefficient increased in the order TZNd1< TZNd2< TZNd3 < TZNd4 < TZNd5. The maximum value of LAC obtained at 15 keV were 246, 249, 253, 257, and 260 cm-1 for TZNd1, TZNd2, TZNd3, TZNd4, and TZNd5, respectively. The HVT varies inversely with the linear attenuation coefficient. Throughout the considered energy spectrum the range of for the glasses varied from 22.65 40.22, 22.64 40.25, 22.64 40.29, 22.63 40.32, and 22.63 40.36 for TZNd1, TZNd2, TZNd3, TZNd4, and TZNd5, respectively. The values of fast neutron removal cross section showed a steady increase as the partial densities of Nd and oxygen of the TZNd-glass systems increased. Generally, one can conclude that the additive of Nd2O3 to TeO2-ZnO glasses leads to enhance their mechanical properties and increase their ability to absorb neutron and photon to apply in nuclear medicine applications. تفاصيل المقالة
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  2 - Investigating the performance of hydroponic green fodder and simplified heat transfer model of nanofarm for agricultural engineering application
  Amirreza Esmaeili Hamidreza Bahrami Rozita Hajian Mohsen Karimian Ehsan Shokrani
  In this study, root length and number of roots in forage production were investigated by hydroponic nanofarm chamber. For this purpose, specific amount of corn was planted in a special metal nanofarm culture room in two floors equipped with automatic control system. Aft أکثر

  In this study, root length and number of roots in forage production were investigated by hydroponic nanofarm chamber. For this purpose, specific amount of corn was planted in a special metal nanofarm culture room in two floors equipped with automatic control system. After 6 and 7 days of growth of corn from treated and non-treated sample were randomly selected. The amount of performance of the nanofarm was considered as humidity, temperature, and light parameters. In this research, an experimental observation on nanofarm device was done to check the grow and cultivate corn fodder with and without 202020 fertilizers. Also, the evaluated NFT system was used for prediction and simulation of hydroponic nanofarm. According to our study, there are more than 900 different agricultural products used to make animal feed in which green fodder has the most important response in the agriculture field. The efficiency of seed to fodder in this system is about 1 Kg to 7 Kg of seed (barley), an average of 7 Kg of barley fresh fodder hydroponic can be obtained. This system can have less waste product and higher efficiency. One of the main goals of the control system in Nanofarms is to control the temperature of the internal environment of Nanofarm. In the discussion of nanoform heat transfer, various methods of heat transfer, including conduction, displacement, and radiation are of interest. تفاصيل المقالة