In this paper, a subband coding system which dynamically adapts to the local orientation of image features is investigated. In particular, the re-orientation scheme proposed in [1] is used in conjunction with a separable octave-band subband decomposition. This is then followed by e cient coding techniques such embedded zerotrees, trellis coded quantization, and stackrun coding. The coded images...

During development of new and experimental imaging techniques, one must compare with other well established methods to qualify the validity of the new methods. The use of diffusion tensor magnetic resonance imaging for the visualization of collateral nerve fibers in the spinal cord was recently proposed. To validate this new imaging method, the MR results need to be compared with histology tiss...

Fused yttrium-alumoborate glasses doped with ytterbium, silicon, chromium, and sodium were synthesized. The influence of the matrix on "spectroscopic behavior" chromium ions efficiency their sensitization Yb3+ luminescence was established by spectral-luminescence EPR-studies. It found that (1) in alkali-free is mainly oxidation degree Cr(III) an appreciable admixture Cr(IV) Cr(V), (2) partial r...

The Na superionic conductor (NASICON) Na3V2(PO4)3 is an important positive electrode material for Na-ion batteries. Here, we investigate the mechanisms of phase transition in NaxV2(PO4)3 (1 ? x 4) upon nonequilibrium battery cycling. Unlike widely believed two-phase reaction a Na3V2(PO4)3–Na1V2(PO4)3 system, determine, first time, structure recently reported intermediate Na2V2(PO4)3 using opera...