منابع مشابه
Conformal Transformations of Pseudo-Rie- mannian manifolds
This is a survey about conformal mappings between pseudo-Riemannian manifolds and, in particular, conformal vector fields defined on such. Mathematics Subject Classification (2000). Primary 53C50; Secondary 53A30; 83C20.
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We developed a maskless plasma texturing technique for multicrystalline silicon (mc-Si) cells using Reactive Ion Etching (RIE) that results in higher cell performance than that of standard untextured cells. Elimination of plasma damage has been achieved while keeping front reflectance to extremely low levels. Internal quantum efficiencies as high as those on planar cells have been obtained, boo...
متن کاملF Rie-textured Silicon Solar Cells
A maskless plasma textu~ring technique using Reactive Ion Etching for silicon solar cells results in a very low reflectance of 5.4 % before and 3.9 % after SiN deposition. A detailed study of surface recombination and emitter properties was made, then solar cells were fabricated using the DOSS solar cell process. Different plasmadamage removal treatments are tested to optimize low lifetime sola...
متن کاملThe classification problem for pseudo-Rie- mannian symmetric spaces
Riemannian and pseudo-Riemannian symmetric spaces with semisimple transvection group are known and classified for a long time. Contrary to that the description of pseudo-Riemannian symmetric spaces with non-semisimple transvection group is an open problem. In the last years some progress on this problem was achieved. In this article we want to explain these results and some of their applications.
متن کاملRobert Insall
Robert Insall was born in London in 1965, into a family of architects, musicians and historians. To their great surprise, he was obviously scientifically inclined from an early age. He did a B.A. at Cambridge University, then stuck around in Cambridge for a Ph.D., where he got interested in Dictyostelium, followed by a postdoc in Johns Hopkins, where he got interested in chemotaxis and cell mov...
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ژورنال
عنوان ژورنال: Austrian History Yearbook
سال: 1981
ISSN: 0067-2378,1558-5255
DOI: 10.1017/s0067237800018671