Several non-asymptotic formulas are established in channel resolvability and identification capacity. They are applied to wire-tap channel. By using them, the ǫ capacities of the above three problems are considered in the most general setting, where no structural assumptions such as the stationary memoryless property are made on a channel. As a result, we solve an open problem proposed in Han &...

In 1964, Hayashi [8] defined and studied the notions of ?-dense in itself sets and ?-perfect subsets in ideal topological spaces. In 1999, Dontchev et al. [5] have studied the notion of Ideal resolvability through codense and completely codense ideal topological spaces. Recently, in the year 2004, Keskin, Noiri and Yuksel [12] have introduced and studied the concepts of fI -sets and fI -continu...

Advances in Adaptive Optics (AO) systems and image processing techniques have allowed image reconstruction to reach new levels of sophistication with impressive improvements in resolvability. The products of these reconstruction methods are often compared by eye due to a lack of widely agreed-upon objective performance metrics. This presentation describes imagery of satellites taken with and wi...

Abstract High-resolution electron microscopy is achievable only when a high dose employed, practice that may cause damage to the specimen and, in general, affects observation. This drawback sets some limitations on range of applications high-resolution microscopy. Our work proposes strategy, based machine learning, which enables significant improvement quality Scanning Transmission Electron Mic...

In this paper, we propose a new multipath exploitation approach for stationary urban target localization with a single radar unit. The proposed non-coherent approach utilizes the embedded directivity in ultra wideband (UWB) antennas to estimate target positions using interior wall multipath returns. We assume resolvability of the multipath components, which is made possible by virtue of using U...

We propose and experimentally demonstrate a parity-time-symmetric electronic system exhibiting the self-dual emitter-absorber property with remarkable modulation depth in radio-frequency (rf) region. The dramatically different rf responses between emitter absorber modes may allow detection of ultrasmall conductive or reactive perturbations. Our measurement results show that even perturbation on...

We show that if K is a nilpotent finite complex, then ΩK can be built from spheres using fibrations and homotopy (inverse) limits. This is applied to show that if map∗(X,S ) is weakly contractible for all n, then map ∗ (X,K) is weakly contractible for any nilpotent finite complex K . AMS Classification numbers Primary: 55Q05 Secondary: 55P50