الفهرس 
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Abstract
Abstract
Particle/grain size and their number density are commonly characterized in two
dimensions (2D) from planar optical or SEM micrographs of polished samples.
Accurate conversion of such quantities into the three dimensional (3D) values are
necessary for prediction of material properties. Several contradicting conversion
correlations are available in literature. The main objective of the current works it to
verify some of them. For this purpose, geometrical (3D) models of randomly
distributed mono-size spheres were constructed and sliced at different planes. The
particle count and their size were variated within the same control volume. The
statistical investigations of the date suggested a (2D)-to-(3D) conversion factor of
1.152377 ± 0.009427, which is very close to some of earlier works [A. N. Sinha,
1999]
On the other hand, a multimedia program was prepared for the course of materials
technology and its tests for the students of the second division of production
technology in industrial education colleges, including a proposed unit entitled
”Quantitative Estimation of Metals” , And the preparation of measuring tools to
determine the effectiveness of this unit, was in the development of computerized
testing, and the design of notes for students’ performance of the skills contained in
this unit, and analyzed the current content and a list of concepts, skills and the main
subsections contained in this decision