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Publication Date
Mon Jul 31 2017
Journal Name
Journal Of Engineering
Volume
23
Issue Number
8
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Effect of New Urban Transformations at Townscape of Historical Cities Urban Study of Alnajaf Historical City Center
Urban transformations
Community participation
Historical Cities Centers
Townscape
Al-najaf City Center
صبيح لفتة فرحان الزبيدي
حسام ساجت عويد الدلفي
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Publication Date
Mon Nov 01 2010
Journal Name
Al-nahrain Journal Of Science
Chemical Elements Diffusion in the Solar Interior
The standard solar model and equation of state have been used to study relative diffusion of Hydrogen and Helium in the present time for solar interior
as a function of distance and depth from the center of the star. The effects of temperature and density on diffusion velocity for these chemical elements have been explaned. It is found that heat flow which is arising from these reactions leads to an increase in helium diffusion velocity
while the temperature and density leading to a decrease in Hydrogen diffusion velocity. This means that Hydrogen behaves inversely with that for helium does through these reactions. Accordingly
diffusion percentages for Hydrogen
Helium and other Heavy Elements could be determined for the main sequence stars and white dwarf stars.
H.
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