Abstract: A cross reality system that provides an immersive user experience by storing persistent spatial information about the physical world that one or multiple user devices can access to determine position within the physical world and that applications can access to specify the position of virtual objects within the physical world. Persistent spatial information enables users to have a shared virtual, as well as physical, experience when interacting with the cross reality system. Further, persistent spatial information may be used in maps of the physical world, enabling one or multiple devices to access and localize into previously stored maps, reducing the need to map a physical space before using the cross reality system in it. Persistent spatial information may be stored as persistent coordinate frames, which may include a transformation relative to a reference orientation and information derived from images in a location corresponding to the persistent coordinate frame.

Abstract: Provided herein are multi-modal methods and/or systems of diagnosing one or more disease, as described elsewhere herein.

Abstract: The tobacco harvester as pulled by a tractor and is adapted to span two rows of tobacco simultaneously, two subframes are pivotally mounted from the main frame of the harvester and each subframe includes a pair of spaced apart flat header boards which are spaced apart so as to allow a row of tobacco plants to pass therebetween. A rotating defoliator blade is mounted above each header board and an adjustable deflector is adjustably mounted above each defoliator blade. A horizontal and vertical conveyor arrangement is disposed between each subframe and an identical conveyor arrangement is disposed along the outer side of each conveyor frame for receiving the tobacco leaves and conveying them rearwardly and upwardly to a transverse conveyor.

Abstract: The tobacco harvester is pulled by a tractor having an offset hydraulically operated hitch arrangement which permits the harvester to be selectively positioned to the side of the tractor. A tobacco receiving trailer is coupled to the harvester by a hydraulically operated coupling whereby the trailer can be shifted forwardly and rearwardly alongside the harvester to insure the even distribution of tobacco within the trailer as it is supplied via a conveyor which is laterally shiftable to compensate for the lateral shifting of the harvester relative to the trailer. The harvester is provided with a pair of spaced apart defoliators adapted to be located on opposite sides of a tobacco row. The defoliators are mounted in a sub-frame which is mounted for lateral movement relative to the main frame. The defoliators may be comprised of elongated spiral webs rotatable about their own axes or may be comprised of a pair of oscillating bars having a plurality of laterally extending flexible fingers thereon.

Abstract: The tobacco harvester is adapted to be mounted adjacent the side of a tractor and includes an inclined chute with a chain conveyor operating in an aperture in the bottom of the chute extending the full length of the chute. The lower end of the inclined chute straddles the tobacco plant and a rotating cutter blade mounted at the lower end of the chute severs the stalk close to the ground. The cut tobacco plant travels top first up the conveyor and at the top end of the chute the top of the stalk passes through an aperture formed by orthogonally disposed stationary bars and into the nip between a pair of rotatable feed rollers, one of which is driven. The feed rollers draw the stalk through the stripper bars to strip the leaves from the stalk so that the stalk and the leaves will fall into separate containers.

Abstract: A guide pulley for wide belts is comprised of two smooth cylindrical cylinders secured to or journaled on a shaft in spaced relation and a grooved pulley freely journaled on the shaft intermediate the two cylinders for the reception of a guide rib integral with and extending longitudinally of a wide belt intermediate the edges thereof disposed in engagement with the two cylinders.