Survey of Work in Compressed Air, Auckland Harbour Bridge

Compressed-air work is entering the field of high pressures.

Since 1850, compressed-air work has been used to prevent shafts or tunnels under construction from flooding. Until the 1980s, workers were digging in compressed-air environments. Since the introduction of tunnel boring machines (TBMs), very little digging under pressure is needed. However, the wearing out of cutter-head tools requires inspection and repair. Compressed-air workers enter the pres...

a survey of translation of metaphors in holy quran – part 20&21

چکیده ندارد.

Compressed Air Energy Storage

Compressed Air Energy Storage

Air-bridge microcavities

We introduce and analyze a new type of high-Q microcavity consisting of a channel waveguide and a one-dimensional photonic crystal. A band gap for the guided modes is opened and a sharp resonant state is created by adding a single defect in the periodic system. An analysis of the eigenstates shows that strong field confinement of the defect state can be achieved with a modal volume less than ha...