Several gaps and errors in “Precoding Artificial Noise Design for Cognitive MIMOME Wiretap Channels” by Fang et al. are identified corrected. While accommodating these corrections, a rigours proof is given that the successive convex approximation algorithm of secrecy rate maximization (SRM) does generate an increasing bounded sequence true rates hence converges. It further shown its convergence...

The single-molecule selectivity and specificity of the binding process together with the expected intrinsic gain factor obtained when utilizing flow through a channel have attracted the attention of analytical chemists for two decades. Sensitive and selective ion channel biosensors for high-throughput screening are having an increasing impact on modern medical care, drug screening, environmenta...

The pore-forming toxin lysenin self-assembles large and stable conductance channels in natural and artificial lipid membranes. The lysenin channels exhibit unique regulation capabilities, which open unexplored possibilities to control the transport of ions and molecules through artificial and natural lipid membranes. Our investigations demonstrate that the positively charged polymers polyethyle...

We investigate sequential tunneling through a multilevel quantum dot confining multiple electrons in the regime where several channels are available for transport within the bias window. By analyzing solutions to the master equations of the reduced density matrix, we give general conditions on when the presence of a second transport channel in the bias window quenches transport through the quan...

Artificial channels are common features in lowland agricultural catchments, and a potentially significant habitat for aquatic species. Recent studies have suggested communities managed rivers artificial broadly similar, but with some compositional differences. However, because relatively few considered how may contribute to supporting communities, their physicochemical condition suitability fau...

We identify the presence of multiple vascular channels within the spider fang. These channels seem to serve the transport of zinc to the tip of the fang to cross-link the protein matrix by binding to histidine residues. According to amino acid and elemental analysis of fangs extracted shortly after ecdysis, His-rich proteins are deposited before Zn is incorporated into the cuticle. Microscopic ...

Although ion channels are attractive targets for drug discovery, the systematic screening of ion channel-targeted drugs remains challenging. To facilitate automated single ion-channel recordings for the analysis of drug interactions with the intra- and extracellular domain, we have developed a parallel recording methodology using artificial cell membranes. The use of stable lipid bilayer format...