The present invention provides a water control system with the reservoir level versatility of a weir stack and the relatively easy drainage of a water control gate. Multiple stack beams constrained between two opposed guide channels create a fluid reservoir having an incrementally adjustable fluid level. Increasing or decreasing the reservoir level is a matter of adding or removing one or more stack beams. To create an opening for draining fluid from any level of the reservoir, a picker mechanism captures at least one of the stack beams. By lifting the captured stack beam, and any stack beams atop the captured stack beam, the picker mechanism opens a gate at any level of the reservoir through which fluid may flow.
Armor units for rubble mound structures including breakwaters, revetments, groins. Jetties, and the like. Embodiments are appropriate tor ocean, river, lake and reservoir structure armoring, to prevent erosion from damaging hydrodynaroic forces resulting from waves and water currents, and the like. An embodiment Includes a central rectangular section, three "half H-shaped" appendages, optionally, one end frusta, and a fiat bottom with two extrusions, nominally smaller than other appendages and frusta. An embodiment is symmetric about two perpendicularly intersecting vertical planes extending through the cerstroid of the unit. The three half H-shaped members are connected to outer parts of a side defined as the top and the two longitudinal sides of the central section. The three half H-shaped members comprise four-sided frusta that taper from a base at the central rectangular section to four-sided distal ends. For select embodiments, the frusta are generally symmetric.
A human portable, modular double joist assembly (285) comprising an upper bar joist, a lower bar joist and two roof frames; said (i) a lower bar joist (283) having two opposed ends and comprising a plurality of lower bar joist middle sections (283M) connected to each other in an end-to-end configuration to form a center section of said lower bar joist having two opposed ends, and having two lower bar joist end sections (283E), each of said lower bar joist end sections having a distal end (283E-D) and a proximal end (283E-P), the proximal ends of each lower bar joist end section being attached to an opposed end of said center section of said lower bar joist; wherein the distal ends of said two lower bar joist end sections also define the opposed ends of said lower bar joist; and wherein said two opposed ends of said lower bar joist are each in contact with a lower contact portion (281L) of one of the two roof frames (281), (ii) said roof frames having said lower contact portion and an upper contact portion (281U), said (iii) a upper bar joist (282) having two opposed ends and comprising a plurality of upper bar joist middle sections (282M) connected to each other in an end-to-end configuration to form a center section of said upper bar joist having two opposed ends, and having two upper bar joist end sections (282E), each of said upper bar joist end sections having a distal end (282E-D) and a proximal end (282E-P).
E04H 9/10 - Independent sheltersArrangement of independent splinter-proof walls
E04B 7/00 - RoofsRoof construction with regard to insulation
E04B 1/343 - Structures characterised by movable, separable, or collapsible parts, e.g. for transport
E04C 3/08 - JoistsGirders, trusses, or truss-like structures, e.g. prefabricatedLintelsTransoms of metal with apertured web, e.g. with a web consisting of bar-like componentsHoneycomb girders
Multiple-scale self-assembled tube structures (SATS) comprising multiwall carbon nanotubes (CNT) and processes for their nucleation and growth. These hierarchical and self-assembled SATS demonstrate the feasibility of controlled synthesis of macroscopic CNT structures and CNT-reinforced materials for use in broad applications such as structures, thermal transfer, electronics, fluid dynamics, and micro-fluidics.
B82B 1/00 - Nanostructures formed by manipulation of individual atoms or molecules, or limited collections of atoms or molecules as discrete units
B82B 3/00 - Manufacture or treatment of nanostructures by manipulation of individual atoms or molecules, or limited collections of atoms or molecules as discrete units
B82Y 40/00 - Manufacture or treatment of nanostructures
A system to detect subsurface activity. The system employs vibration sensor pairs, with each sensor pair having a shallow sensor and a deep sensor. Outputs of the sensors of a pair are processed together and events are detected based on the relative values detected by the sensors of the pair. When signal energy departs from a detected background level, the relative amplitude and frequency content of vibrations measured at the shallow and deep sensors may be compared. The comparison may be performed, at least in part, using a classifier that discriminates between subsurface activity and surface activity. The outputs of sensor pairs may be aggregated to make a determination of whether subsurface activity exists and/or its location. Aggregation may involve comparing the outputs of the same sensor pair at multiple time intervals or may involve comparing the outputs of arrayed sensor pairs.
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