Abstract We show that in analytic sub-Riemannian manifolds of rank 2 satisfying a commutativity condition spiral-like curves are not length minimizing near the center spiral. The proof relies upon delicate construction competing curve.

We measured the elastic constants (C11 − C12)/2 and C44 of non-Kramers system Y0.63Pr0.37Ir2Zn20 (Pr-37% system) by means ultrasound to check how single-site quadrupolar Kondo effect is modified increasing Pr concentration. The Curie-like softening present Pr-37% on cooling from 5 1 K can be reproduced a multipolar susceptibility calculation based Γ3 doublet crystalline-electric-field ground st...

general, any n-sequence determines a multiset of (= n!/k!(n-k)!) k-sequences. "J Suppose, conversely, that we are given a multiset 01 k-sequences. Does that multiset come from some sequence? If so, is the source sequence unique? Such questions are reminiscent of the problem of reconstructing graphs from vertex-deleted sub raphs, which has received a great deal of attention in the last twent yea...

The paper deals with a new technique of fragile image watermarking. Proposed technique exploits inter-subband dependencies in order to minimize the influence of inserted watermark on the host image quality. Using the unique watermark based on the low-frequency subband, proposed scheme is resistant against attacks based on series of images analysis. Tampering detection ability of the proposed te...

Implantable long-acting delivery systems able to minimize off-target side effects and locally provide non-invasive imaging reporting are of utmost importance offer a precise treatment internal diseases accurate assessment disease progression, such as in local infections tumor relapse following surgery, among other diseases. Here, biocompatible xanthan gum/Fe3O4-based drug-loaded magnetic nanopa...