A basketball system comprising a court system having shot locations defined by shot location lines on the play surface and the shot areas defined by shot area lines on the play surface, and a goal system comprising a respective backboard suspended above the play surface at each opposing farthest end of the play surface, an instrumentation system comprises sensors to detect activities within the boundary line of the court system, and a respective penalty box for each team in which players, coaches, and referees can serve a penalty assessed for an infraction.

In an artificial surfing system for generating a standing wave, comprising a water circuit, in which a first wave generating device is arranged, which comprises a wave pool and a ramp arranged upstream of the wave pool, over which the water flows down into the wave pool, wherein the water circuit downstream of the wave pool of the first wave generating device comprises a water backflow, via which the water is made available to a pump with which the water can be conveyed from the backflow upwards to the first wave generating device, at least one further wave generating device is arranged in the backflow, to which the water coming from the first wave generating device flows.

A form for constructing a foundation for batter’s and catcher’s boxes and supporting a home plate in a support structure of a synthetic turf field for playing baseball or softball includes a hollow frame comprising an open upper surface and an open lower surface, the hollow frame sized to extend under the batter’s and catcher’s boxes, and a home plate frame supportable by the hollow frame, the home plate frame having a cavity for receiving the home plate.

A form for constructing a foundation for batter’s and catcher’s boxes and supporting a home plate in a support structure of a synthetic turf field for playing baseball or softball includes a hollow frame comprising an open upper surface and an open lower surface, the hollow frame sized to extend under the batter’s and catcher’s boxes, and a home plate frame supportable by the hollow frame, the home plate frame having a cavity for receiving the home plate.

Inflatable skateboarding ramp with an inflatable base that gives shape to the ramp, a semi-rigid surface located on the upper face of the inflatable base with one or two entrance platforms, as well as a rolling area and means for fixing the semi-rigid surface and the inflatable base.

Inflatable skateboarding ramp with an inflatable base that gives shape to the ramp, a semi-rigid surface located on the upper face of the inflatable base with one or two entrance platforms, as well as a rolling area and means for fixing the semi-rigid surface and the inflatable base.

The present invention provides a bidirectional energy-transfer system comprising: a thermally and/or electrically conductive concrete, disposed in a structural object; a location of energy supply or demand that is physically isolated from, but in thermodynamic and/or electromagnetic communication with, the thermally and/or electrically conductive concrete; and a means of transferring energy between the structural object and the location of energy supply or demand. The system can be a single node in a neural network. The thermally and/or electrically conductive concrete includes a conductive, shock-absorbing material, such as graphite. Preferred compositions are disclosed for the thermally and/or electrically conductive concrete. The bidirectional energy-transfer system may be present in a solar-energy collection system, a grade beam, an indoor radiant flooring system, a structural wall or ceiling, a bridge, a roadway, a driveway, a parking lot, a commercial aviation runway, a military runway, a grain silo, or pavers, for example.

A structural element, including a base portion and a connecting central pin, has its base portion formed hallow, and having an internal reinforcement in the shape of WOW or MOM, to connect these elements with an insertable central pin so that the cross-section of the pin corresponds to the shape of the chamber between the reinforcements, when the upper surface of the structural element has longitudinal grooves, and is made from a modified polymer or elastomeric material comprising India rubber mixtures. The foundation is monomer ethylene propylene diene or natural rubber or styrene-butadiene rubber and/or combinations of the natural rubber/styrene-butadiene rubber, or thermoplastic elastomers, whose base is monomer ethylene-propylene-diene or polypropylene/monomer ethylene-propylene-diene or polyvinylchloride, or thermoplastic vulcanizates, whose base is monomer ethylene-propylene-diene and polyethylene or natural and/or synthetic rubber, modified by polyethylene or polypropylene.

A structural element, including a base portion and a connecting central pin, has its base portion formed hallow, and having an internal reinforcement in the shape of WOW or MOM, to connect these elements with an insertable central pin so that the cross-section of the pin corresponds to the shape of the chamber between the reinforcements, when the upper surface of the structural element has longitudinal grooves, and is made from a modified polymer or elastomeric material comprising India rubber mixtures. The foundation is monomer ethylene propylene diene or natural rubber or styrene-butadiene rubber and/or combinations of the natural rubber/styrene-butadiene rubber, or thermoplastic elastomers, whose base is monomer ethylene-propylene-diene or polypropylene/monomer ethylene-propylene-diene or polyvinylchloride, or thermoplastic vulcanizates, whose base is monomer ethylene-propylene-diene and polyethylene or natural and/or synthetic rubber, modified by polyethylene or polypropylene.

A platform for holding events including the use of replicas of medieval armor and/or replicas of medieval weapons, including a battle area located on a supporting structure at a level above the platform base, and smooth slopes extending downward along the entire perimeter from the sides of the battle area and having a base of hard material and executed with a soft coating, wherein a stumbling barrier is located along the entire perimeter or along two opposite sides of the battle area.