Abstract: A system and method are provided for determining ball speed. The method comprises obtaining a video having a plurality of frames; analyzing each frame of the video to detect a position and a size of a ball moving through the frames; calculating the ball speed using the position and size determined from the frames, and a predetermined true size of the ball associated with the video; and outputting the speed of the ball. The analyzing can include applying operations of, background subtraction, noise removal, and motion filtering.

Abstract: A strip of fiber-reinforced polymeric material for a longitudinal reinforcing structure of a wind turbine blade, the strip having substantially flat upper and lower surfaces and extending longitudinally between first and second transverse edges, wherein an end region of the strip tapers in thickness towards the first transverse edge, and wherein one or more slots are defined in the tapered end region, the or each slot extending longitudinally from the first transverse edge of the strip into the tapered end region.

Abstract: This invention relates to query management. A query management method includes receiving a database query, generating an abstract syntax tree representation of the database path query into a set of java objects, and processing the abstract syntax tree representation of the database path query. The method further includes determining a selector upon processing the abstract syntax tree representation of the database path query and deriving a SELECT clause from the selector clause, where the SELECT clause indicates a portion of an expression from an XMeta Query Language (XMQL) query. The method yet further includes appending a FROM clause to the expression for the XMQL query, appending a WHERE clause to the expression for the XMQL query, and executing the expression for the XMQL query including the appended FROM clause and also the appended WHERE clause to access objects in an object repository.

Abstract: A web locating device for locating a shear web at a predefined location on an inner surface of a wind turbine blade shell is described. The base comprises a base and a first guide structure. The base is for securing to the inner surface of the blade shell at a predefined position on the inner surface and the first guide structure projects from the base. The first guide structure has a first guide surface arranged to guide a mounting portion of the shear web towards the predefined location on the inner surface of the wind turbine blade shell. The base of the device includes one or more alignment features for aligning with one or more reference features at the predefined position on the inner surface of the blade shell. Also described are a wind turbine blade, and a method of making a wind turbine blade.

Abstract: A method of making an elongate reinforcing structure, such as a shear web, for a wind turbine blade is described. The reinforcing structure comprises a longitudinally-extending web and a longitudinally-extending flange. The flange extends along a longitudinal edge of the web and is arranged transversely to the web. The method involves providing a flange structure comprising a flange portion, and a projecting portion that extends along the length of the flange portion and projects transversely from a surface of the flange portion. The projecting portion is bonded between laminate layers of the web. The flange structure is preferably a pultruded component having a T-shaped cross-section. The method allows a simple, inexpensive and reconfigurable mould tool to be used. In preferred embodiments the mould tool has a flat surface without sidewalls.

Abstract: A method of making a composite wind turbine component in a mould is described. The method comprises the steps of: providing a mould; providing one or more first layers (20) of material; arranging the first layer(s) of material in the mould; arranging one or more second layers (20) of material on top of the first layer(s) to form a stack (22); and securing the second layer(s) to the first layer(s) by means of one or more fasteners (24). The steps of the method can be performed in any suitable order. The fasteners (24) each comprise a filament having a first retaining element at a first end and a second retaining element at a second end. To secure the second layer(s) to the first layer(s), the first retaining element of each fastener is inserted through the second layer(s) and the first layer(s) such that the first retaining element is located on one side of the stack and the second retaining element is located on the other side of the stack, with the filament extending through the stack (22).

Abstract: A method of manufacturing a wind turbine blade using pre-fabricated stacks of reinforcing material is described. The stacks 14 comprise a plurality of plies of fiber material, joined together along a side edge to form a spine. The opposite edges of the stack are left unjoined so that the plies can separate and slide across one another. In doing so, the stacks can be stored flat, but on installation into a curved mold 12 profile, the plies may slide to adopt the curved shape of the mold. The stacks extend from a point near the leading or trailing edge of the mold to an intermediate point on the mold surface. The stacks may be used to construct the thickened root section of a wind turbine blade.

Abstract: Method of bonding a shear web (50) to a wind turbine blade shell (75) and the obtained blade, wherein the shear web (50) comprises a web and a mounting flange (56) oriented transverse to the web (50). The method involves: providing a seal (66, 68) on the mounting flange (56) of the shear web (50) such that when the mounting flange (56) is positioned against the blade shell (75), a cavity (76) is defined by the seal between the mounting flange (56) and the blade shell (75). The air of the cavity (76) is then evacuated and adhesive is injected into the cavity (76). The use of pieces (80) to keep the distance between the mounting flange (56) and the blade shell (75) is preferred.

Abstract: A method of making an elongate wind turbine blade is described. The wind turbine blade extends longitudinally between a root end and a tip end in a spanwise direction, and the method comprises: (a) providing an elongate mould tool (20) extending longitudinally in a spanwise direction; (b) arranging an elongate spar structure (40) in the mould tool, the spar structure (40) N extending longitudinally in the spanwise direction; (c) arranging core material (24) adjacent to the spar structure (40); (d) providing resin-permeable material (114) between the spar structure (40) and the core material (24); and (e) administering resin into the mould during a resin infusion process. The resin-permeable material (114) restricts the flow of resin between the spar structure (40) and the core material (24) in the spanwise direction and thereby substantially prevents lock-offs from forming during the infusion process.

Abstract: This invention relates to query management. A query management method includes receiving a database query, generating an abstract syntax tree representation of the database path query into a set of java objects, and processing the abstract syntax tree representation of the database path query. The method further includes determining a selector upon processing the abstract syntax tree representation of the database path query and deriving a SELECT clause from the selector clause, where the SELECT clause indicates a portion of an expression from an XMeta Query Language (XMQL) query. The method yet further includes appending a FROM clause to the expression for the XMQL query, appending a WHERE clause to the expression for the XMQL query, and executing the expression for the XMQL query including the appended FROM clause and also the appended WHERE clause to access objects in an object repository.

Abstract: A strip of fibre-reinforced polymeric material for a longitudinal reinforcing structure of a wind turbine blade, the strip having substantially flat upper and lower surfaces and extending longitudinally between first and second transverse edges, wherein an end region of the strip tapers in thickness towards the first transverse edge, and wherein one or more slots are defined in the tapered end region, the or each slot extending longitudinally from the first transverse edge of the strip into the tapered end region.

Abstract: A pultrusion process for making a strip for an elongate reinforcing structure of a wind turbine blade, the process comprising drawing fibres (42) and resin through a pultrusion die (40) in a process direction to form a strip (102); and applying an infusion-promoting layer (110) to a surface of the strip down-stream from the die in the process direction. A pultrusion apparatus is also disclosed.

Abstract: A method for inferring a relationship between a first user and an area is disclosed, where the user is associated with one or more user devices. The method comprises retrieving event records having user device information corresponding to the user devices, and inferring, based on the event records, a relationship between the user and the area. A method for determining the presence of users at a location of a plurality of locations organised in a hierarchical structure is also disclosed. The method comprises receiving an indication of a location selected from the hierarchical structure, determining nodes associated with the selected location, retrieving event records from each node, and determining, based on the retrieved records, a number of users located at the selected location.

Abstract: This invention relates to query management. A query management method includes receiving a database query, generating an abstract syntax tree representation of the database path query into a set of java objects, and processing the abstract syntax tree representation of the database path query. The method further includes determining a selector upon processing the abstract syntax tree representation of the database path query and deriving a SELECT clause from the selector clause, where the SELECT clause indicates a portion of an expression from an XMeta Query Language (XMQL) query. The method yet further includes appending a FROM clause to the expression for the XMQL query, appending a WHERE clause to the expression for the XMQL query, and executing the expression for the XMQL query including the appended FROM clause and also the appended WHERE clause to access objects in an object repository.

Abstract: An exercise utilizes roller ball transfers for many embodiments, and those without, as well as an ability to add and remove weights thereto from above and possibly rotate in order to perform various exercises.