Mycobacteria have low-permeability outer membranes that render them resistant to most antibiotics. Hydrophilic nutrients can enter by way of transmembrane-channel proteins called porins. An x-ray analysis of the main porin from Mycobacterium smegmatis, MspA, revealed a homooctameric goblet-like conformation with a single central channel. This is the first structure of a mycobacterial outer-memb...

Effects of material and configuration of the internal wall on the performance of wideband channel are investigated by using the Finite Difference Time-Domain (FDTD) method. The indoor wideband channel characteristics, such as the path-loss, Root-Mean-Square (RMS) delay spread and number of the multipath components (MPCs), are presented. The simulated results demonstrate that the path-loss and M...

In vivo measurements of cortical thickness from MR images have potentially widespread utility in the characterisation of normal brain development and maturation as well as in diagnosing and measuring the progress of a number of cortical pathologies. The literature describes several approaches to this problem, which may be divided into two groups: those relying on deformable models of the inner ...

We provide some general theoretical results to guide the optimization of transverse hydrodynamic phenomena in superhydrophobic channels. Our focus is on the canonical micro- and nanofluidic geometry of a parallel-plate channel with an arbitrary two-component (low-slip and high-slip) coarse texture, varying on scales larger than the channel thickness. By analyzing rigorous bounds on the permeabi...

It has been possible to modify the sampler module of the AutoAnalyzer to enable laboratoriespossessingadditional recorder and colorimeter units to analyse two sets of specimens simultaneously. Basically the device consists of a circular plastic channel of rectangular cross-section which fits on top of the normal sample plate and carries a second ring of cups (Fig. 1). The external diameter is 1...

The coupled acoustic-gravity field channel used in this study is schematically illustrated in Fig. 5.1. A lead-zirconate-titanate transducer with 510kHz resonant frequency (170mm-length × 15mm-width × 4.2mm-thick, Fuji-ceramics Inc., Japan) was glued on a 5.00mm-thick Pyrex glass plate using epoxy adhesive. Boat-shaped PTFE spacer (0.8mm-thickness) was sandwiched between the glass plate with tr...

An investigation is presented into intrinsic parameter fluctuations in thin-body SOI MOSFETs due to local variations in body thickness as a result of interface roughness. A series of well scaled devices from 15 nm channel length down to 5 nm are investigated using three-dimensional drift-diffusion simulations which include the density gradient equation to account for quantum mechanical effects....

Aggressive scaling of MOS devices requires use of ultra-thin gate oxides to maintain a reasonable short channel effect and to take the advantage of higher density, high speed, lower cost etc. Such thin oxides give rise to high electric fields, resulting in considerable gate tunneling current through gate oxide in nano regime. Consequently, accurate analysis of gate tunneling current is very imp...

Large-amplitude waves at the interface between two laminar immisible inviscid streams of different densities and velocites, bounded together in a straight infinite channel are studied, when surface tension and gravity are both present. A long-wave approximation is used to develop a theory for fully nonlinear interfacial waves allowing amplitudes as large as the channel thickness. The result is ...