OBJECTIVES The purpose of this study was to investigate the effect of different air-polishing powders on the color stability of different types of composite resin restorative materials. MATERIAL AND METHODS Thirty cylindrical specimens (15×2 mm) were prepared for each of 7 composite resin restorative materials. All specimens were polished with a series of aluminum oxide polishing discs (Sof-L...

The essence of the Electro Droplet-Jet Technology (EDJT) consists of the production of a linear sequence of monodisperse droplets of a fluid, separated from each other by equal distances. Numerical simulation of a liquid jet dispersion and a two-phase droplet flow problem were performed. The effect of the computational mesh on the predictions was investigated; in particular, the influence of th...

Nowadays, several models of unidimensional fluid jets exploit discrete element methods. In some cases, as for models aiming at describing the electrospinning nanofabrication process of polymer fibers, discrete element methods suffer a non-constant resolution of the jet representation. We develop a dynamic meshrefinement method for the numerical study of the electro-hydrodynamic behavior of char...

Plink Jet is a robotic musical instrument made from scavenged inkjet printers and guitar parts. We investigate the expressive capabilities of everyday machine technology by recontextualizing the relatively high-tech mechanisms of typical office debris into an electro-acoustic musical instrument. We also explore the performative relationship between human and machine.

Motivated by DNA electrophoresis near a nanopore, we consider the flow field around an "elongated jet," a long thin source which injects momentum into a liquid. This solution qualitatively describes the electro-osmotic flow around a long rigid polymer, where due to electrohydrodynamic coupling, the solvent receives momentum from the electric field. Based on the qualitative behavior of the elong...

A very thin liquid jets can be obtained using electric fields. The electrically-driven bending instability of the jet enormously increases the jet elongation path and effectively leads to its tinning by very large ratios and can be used to produce nanofibres. The mechanism of electro-thinning of liquid jets, discovered almost one century ago, is yet not fully understood. In the following study ...

This article discusses the recent advances in polishing of advanced materials. Ninety-five journal articles published in 2005–2007 are briefly introduced. The topics are advances in chemical mechanical polishing (CMP), fluids for polishing, modeling of polishing, polishing of brittle materials, robotic polishing, polishing with vibrations or beams, and friction in polishing processes. CMP is pe...