Various fluxing materials are added to technical ceramics in an attempt to lower their sintering temperatures and make their processing economical. The effect of 0·3 wt% Li2CO3 addition on the phase, microstructure, phase transition temperatures and dielectric properties of BaTiO3 was investigated in the present study. The addition of 0·3 wt% Li2CO3 was observed to lower the optimum sintering t...

This paper proposes an adaptive robust control scheme for an Underwater-Vehicle Manipulator System (UVMS). The proposed controller enables the tracking of the intersection of multiple local sub-regions that are assigned for each subsystem of a UVMS under the influence of modelling uncertainties as well as additive disturbances. The presence of variable ocean currents creates hydrodynamic forces...

We show that for an arbitrary Set-endofunctor T the generalized membership function given by a sub-cartesian transformation μ from T to the filter functor F can be alternatively defined by the collection of subcoalgebras of constant T -coalgebras. Sub-natural transformations ε between any two functors S and T are shown to be sub-cartesian if and only if they respect μ. The class of T -coalgebra...

Implementation of more refined structures at the nano to microscale is expected advance applications in optics and photonics. This work presents additive manufacturing 3D luminescent microarchitectures emitting light visible range. A tailor-made organo-metallic resin suitable for two-photon lithography developed, which upon thermal treatment an oxygen-rich atmosphere allows creation silicon-fre...

Organosilanes range among the most important products in chemical industries. Unfortunately, their bulk production starting from silicon oxides has a substantial ecological footprint due to immense energy consumption and numerous hazardous by-products imposed by redox cycling between Si(0) Si(IV). Herein, we report first redox-neutral, one-pot silicon−carbon bond formation silica gel combining ...