منابع مشابه
Degree Scale Anisotropy
1. ABSTRACT The Cosmic Background Radiation gives us one of the few probes into the density perturbations in the early universe that should later lead to the formation of structure we now observe. Recent advances in degree scale anisotropy measurements have allowed us to begin critically testing cosmo-logical models. Combined with the larger scale measurements from COBE we are now able to direc...
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Let K be a cyclic number field of prime degree `. Heilbronn showed that for a given ` there are only finitely many such fields that are normEuclidean. In the case of ` = 2 all such norm-Euclidean fields have been identified, but for ` 6= 2, little else is known. We give the first upper bounds on the discriminants of such fields when ` > 2. Our methods lead to a simple algorithm which allows one...
متن کاملAnisotropy of HARDI Diffusion Profiles based on the L-Norm
The fractional anisotropy (FA) value for Diffusion Tensor Imaging is widely used to determine the anisotropy of diffusion in a given voxel. As the FA value is based on the tensor’s eigenvectors it is not possible to calculate this quantity for HARDI diffusion profiles. In this paper we introduce an anisotropy index for HARDI data that utilizes the L-norm as the most natural notion of distance f...
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The fract ional a lliso tropy (FA ) value for Diffusion Tensor Imagillg is widely Ilsed to del.crminc t.he anisotrop~' of di fl'usioll in a given voxel. As the FA value is based on the tensor's eigenvectors it is not possible to calculate this quantity for I-IARDI dif1'tlsion profil es. III t his paper we introduce an anisotropy index for HARDI data that utilizes the L-norm as the most na tural...
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ژورنال
عنوان ژورنال: Journal of Applied Sciences
سال: 2001
ISSN: 1812-5654
DOI: 10.3923/jas.2001.301.304