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Hollow-core slabs and wall elements without prestressed steel wire can be formed by extruders. The size of these elements will typically range in width from 600 to 2400 mm, in thickness from 150 to 500 mm, and can be delivered in lengths of up to 24 m. [1] The voids of the hollow core can be used as conduit for installations.
Alternatively, one can create a photonic bandgap photonic crystal fiber, in which the light is confined by a photonic bandgap created by the microstructured cladding—such a bandgap, properly designed, can confine light in a lower-index core and even a hollow (air) core. Bandgap fibers with hollow cores can potentially circumvent limits ...
The Hollow Earth is an obsolete concept proposing that the planet Earth is entirely hollow or contains a substantial interior space. Notably suggested by Edmond Halley in the late 17th century, the notion was disproven, first tentatively by Pierre Bouguer in 1740, then definitively by Charles Hutton in his Schiehallion experiment around 1774.
The SoNo Collection is an upscale shopping mall in the South Norwalk neighborhood of Norwalk, Connecticut.It was announced and originally developed by GGP Inc. (General Growth Properties) in 2017; it has been owned and managed by Brookfield Properties, a subsidiary of Brookfield Asset Management, since its acquisition of GGP in 2018.
The electronic lock core is the same as the mechanical lock core, which can be directly modified into the existing mechanical lock. Different from the mechanical lock core, the electronic lock core integrates a miniature electronic single-chip microcomputer , there is no mechanical keyhole, and only three metal contacts are retained. [ 4 ]
Assume that is a subset of a vector space . The algebraic interior (or radial kernel) of with respect to is the set of all points at which is a radial set.A point is called an internal point of [1] [2] and is said to be radial at if for every there exists a real number > such that for every [,], +.