The Effect of Temperature on Conductivity of Conductors and Superconductors
Amel Abdallah Ahmed Elfaki,
Abdelnabi Ali Elamin,
Mubarak Dirar Abd-Alla,
Rawia Abd Elgani,
Ali Suliman Mohammed,
Alaa Ahmed Mohammed,
Sawsan Ahmed Elhouri
Issue:
Volume 5, Issue 1, January 2017
Pages:
1-5
Received:
26 November 2016
Accepted:
6 January 2017
Published:
13 February 2017
Abstract: The thermal conductivity coefficient has been studied for three types of wires. Pure copper wire, 15cm long copper coated and 50cm long copper coated. In order to compare thermal conductivity for these wires and to recognize the meaning of superconductivity and the effect of temperature on conductivity of conductors and superconductors. The thermal conductivity coefficient has been calculated and the resistivity also has been conducted. The obtained result agrees with theoretical consideration.
Abstract: The thermal conductivity coefficient has been studied for three types of wires. Pure copper wire, 15cm long copper coated and 50cm long copper coated. In order to compare thermal conductivity for these wires and to recognize the meaning of superconductivity and the effect of temperature on conductivity of conductors and superconductors. The thermal...
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Determination of Natural Radioactivity in the North East Beach Sands of Madagascar
Randriamora Tiana Harimalala,
Razafindramiandra Hary Andrianarimanana,
Raoelina Andriambololona,
Ravelomanantsoa Solofonirina Dieudonné,
Ralaivelo Mbolatiana Anjarasoa Luc,
Rasolonirina Martin,
Zafimanjato Joseph Lucien Radaorolala,
Randriantseheno Hery Fanja
Issue:
Volume 5, Issue 1, January 2017
Pages:
6-12
Received:
30 December 2016
Accepted:
17 January 2017
Published:
13 February 2017
Abstract: Exploration and exploitation of radioactive ores (ilmenite, zircon and monazite) are considered as the main source of exposure to ionizing radiation of the population living in the coast of Analanjorofo Region (Fénérive-Est Districts, Rural municipality Ampasimbe Manantsatrana). Radioactivity measurements have been performed in this region. The distribution of natural radionuclide gamma-emitters (238U, 232Th and 40K) and their respective annual effective dose rates have been determined for sand(s), water and air. The samples have been collected along and around the coast of the region. The radiation emitted from the natural radionuclide containing in the environmental samples has been determined by gamma spectrometry system and Radon meter (SARAD). Exposure dose rates at 1 m above the ground have been measured along the coast and in the villages around the exploitation sites. Dose rate measurements have been performed by Dosimeter Graetz X5 DE, equipped of Geiger Müller Counter. Results have been compared with the reference values provided by IAEA (BSS 115) and UNSCEAR 2000.
Abstract: Exploration and exploitation of radioactive ores (ilmenite, zircon and monazite) are considered as the main source of exposure to ionizing radiation of the population living in the coast of Analanjorofo Region (Fénérive-Est Districts, Rural municipality Ampasimbe Manantsatrana). Radioactivity measurements have been performed in this region. The dis...
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