This paper is motivated by the problem of integrating multiple sources of measurements. We consider two multiple-input-multiple-output (MIMO) channels, a primary channel and a secondary channel, with dependent input signals. The primary channel carries the signal of interest, and the secondary channel carries a signal that shares a joint distribution with the primary signal. The problem of part...

In this work, we examine effects of permanent charges on ionic flows through ion channels via a quasi-one-dimensional classical Poisson-Nernst-Planck (PNP) model. The geometry of the three-dimensional channel is presented in this model to a certain extent, which is crucial for the study in this paper. Two ion species, one positively charged and one negatively charged, are considered with a simp...

This article explores global geometric features of bicontinuous space-partitions and their relevance to self-assembly of block-copolymers. Using a robust definition of ‘local channel radius’, based on the concept of a medial surface [1], we relate radius variations of the space-partition to polymolecular chain stretching in bicontinuous diblockand terblock copolymer assemblies. We associate loc...

The one-dimensional, cylindrical nature of single-walled carbon nanotubes SWCNTs suggests that the ideal gating geometry for nanotube field-effect transistors FETs is a surround gate SG . Using vertical SWCNTs templated in porous anodic alumina, SGs are formed using top-down processes for the dielectric/metal depositions and definition of the channel length. Surround gates allow aggressive scal...

1 Quantum Informational Divergence in Quantum Channel Security Analysis Laszlo Gyongyosi and Sandor Imre (Corresponding author: L. Gyongyosi) Department of Telecommunications, Budapest University of Technology Magyar tudosok krt. 2., Budapest, H-1117, Hungary (Email: [email protected]) (Received May 20, 2009; revised and accepted Mar. 24, 2010) Abstract Computational Geometry is the art of d...

Adaptive switching between multiple-input multiple-output (MIMO) transmission schemes like diversity and spatial multiplexing yields significantly higher capacity gains over fixed transmission schemes. Previous work has shown the impact of channel correlation and SNR on the switching between different schemes like beamforming and spatial multiplexing. This paper explores the influence of antenn...

Slab geometric boundary conditions are applied in the molecular dynamics simulation of a simple membrane-channel system. The results of the simulation were compared to those of an analogous system using normal three-dimensional periodic boundary conditions. Analysis of the dynamics and electrostatics of the system show that slab geometric periodicity eliminates the artificial bulk water orienta...

We develop a model for a large array ground receiver system for use in deep-space communications, and analyze the resulting array channel capacity. The model includes effects of array geometry, time-dependent spacecraft orbital trajectory, point and extended interference sources, and elevation-dependent noise and tropospheric channel variations. Channel capacity is expressed as the ratio of det...