The formation of a monocrystalline silicon needle by picosecond optical vortex pulse illumination was demonstrated for the first time in this study. The dynamics of this silicon needle formation was further revealed by employing an ultrahigh-speed camera. The melted silicon was collected through picosecond pulse deposition to the dark core of the optical vortex, forming the silicon needle on a ...

The use of a volume holographic filter as collector element in a confocal system imaging through scattering (turbid) material is described. We show that the penetration depth of the volume holographic system is de-coupled from the scatter noise discrimination properties, and is potentially more advantageous than the traditional confocal microscope. Since the volume-holographic filter is a match...

This study examined the suitability of polyethylene terephtal (PET) waste to provide an alternative modification bitumen and reduce accumulation. The chemical structure physical properties were evaluated for modified with different PET flakes content from 2 10 %. effect on bituminous systems was analyzed using IR 1H NMR spectroscopy, differential thermal (DTA) thermogravimetric (TGA) analyses. ...

BACKGROUND & OBJECTIVES Intraosseous (IO) access is an alternative to difficult intravenous (iv) access during emergency clinical situations. Existing IO solutions are expensive, require power supply and trained manpower; limiting their use in resource constrained settings. To address these limitations, a novel IO device has been developed. The objectives of this study were to evaluate function...