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In this paper, a case of a simple antenna represented by a spherical dipole, coated by dual layers of homogeneous material, is considered and solved analytically using the spherical harmonics. The excitation is assumed to be due to a constant gap voltage. It is shown that in the works of Shafai and Kehn (2008, 2009), the classical boundary value problem solution results in unrealistic power radiations,...
In recent years, synthetic hydroxyapatite (HAP) has attracted much interest because of the quest for new generation implants able to promote rapid osteointegration and having longer lifetimes. HAP a major inorganic component of bone, has been increasingly used as a bioceramic coating for load-bearing implants to improve fixation to natural bone tissue. In this study, HAP coating was synthesized using...
Flexible high barrier materials are needed for the use of future PV module technologies. R2R processes play a key roll for the production of e.g. a-Si, μc-Si, CIS, CIGS or CdTe modules. The requirements for such flexible high barrier materials are very demanding. Permeation values as low as 10−5 g/m2 day for water vapor transition (WVTR) and respectively 10−5 cm3/m2 day atm for oxygen transition (OTR)...
A method to assist in the selection of a material for cable lacing bundles is discussed. Heretofore little work has been published evaluating cable lacings, and opinions vary widely as to the proper material to use. This paper is intended to help resolve some of these opinions by presenting the results of an experiment performed at our plant. Five rolls of twine and tape were evaluated to determine...
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