In recent years, octagonal steel hollow sections (OctHSs) have attracted significant interests from researchers and engineers, OctHSs been employed in civil engineering applications. However, designs of are not included structural design codes. This paper therefore presents comprehensive numerical analyses on the stub column behaviour OctHSs. A database 46 tests reported 6 sources were collecte...

We demonstrate a universal polarization controller for hollow-core fibers, a simple device consisting of three twisted fiber sections that makes use of the inherent birefringence of the air-core fiber. The device 5% bandwidth at 1550 nm is calculated from measured data to be approximately 13 nm.

Well-defined carbon polyhedrons with faceted morphologies and hollow internal structures made of self-organized multi-walled carbon nanotubes have been fabricated by gas phase catalytic CVD inside microchannels, of which the confined space is critical for the formation of polyhedral structures with hexagonal, heptagonal and octagonal cross-sections that show superhydrophobic properties, with th...