Drug release mechamsms of swellable systems for controlled drug administration were investigated The variations of the matrix relaxation and drug diffusion rates were quantified, by measuring the surface area exposed during matrix swelling and drug release as a function of impermeable coating coverage and location. Four different types of matrices, partially coated on various sides, were invest...

Abstract In this study, the fracture mechanisms of Cr-coated Zr4 alloy samples were studied by in-situ tensile testing with high-resolution observations. Both original sample and pre-oxidized to study effects pre-oxidation on cracking failure behavior. For sample, increase strain, multiple surface cracks dominant less interfacial formed, indicating good strength Cr coating. samples, there was a...

A multiparticulate system was developed using the coating pan method with nonpareil seed as the core material for the Theophylline. The drug loaded pellets were prepared by powder layering technique, sprinkling the drug on the nonpareil seeds using PVP K-30 in IPA as binder. The drug loaded pellets were coated by using polymers ethyl cellulose, EUDRAGITRS:RL (2:1) and EUDRAGIT® RS:RL (3:1). The...

Damascene approaches are widely used for creating microelectronic interconnects. Successful implementation of the process is reliant upon the deposition of a refractory metal or metal nitride liner coating. It functions as a diffusion barrier layer to suppress transport of subsequently deposited interconnect metals into the surrounding dielectric. The development of vapor-phase processes for th...

Nanoscale Schottky barrier MOSFETs (SBFETs) are explored by solving the two-dimensional Poisson equation self-consistently with a quantum transport equation. The results show that for SBFETs with positive, effective metal-semiconductor barrier heights, the on-current is limited by tunneling through a barrier at the source. If, however, a negative metal-semiconductor barrier height could be achi...

A transparent and effective thin film encapsulation (TFE) based on a multilayer structure is demonstrated. Alternate films of amorphous and crystalline film forming organic materials have been investigated to create complicated diffusion pathways for oxygen and water vapour, which was reflected in their increased barrier properties. These layers are further protected by an inorganic barrier coa...

The bias and temperature dependent resistance and magnetoresistance of magnetic tunnel junctions with and without intentional shorts through the insulating barrier were studied. Based on the experimental results, a set of quality criteria was formulated that enables the identification of barrier shorts. While the temperature and bias dependencies of the junction resistance and of the fitted bar...

Thermal barrier coating (TBC) systems are coating systems containing a metallic bond coat and a ceramic top coat. TBCs are used in gas turbines for thermal insulation and oxidation resistance. Life prediction of TBCs is important as high-temperature exposure degrades the coatings through mechanisms such as thermal fatigue and the formation and growth of thermally grown oxides (TGOs). This thesi...

It has been shown previously that a panel comprising a cellular array can yield a normal incidence transmission loss in a specified low frequency range that is significantly larger than that of a homogeneous panel having the same mass per unit area. The cellular metamaterial considered consists of a periodic arrangement of unit plates held in a grid-like frame. However, when the incident sound ...