Abstract: This disclosure relates to analysing rock falls. A video camera captures video data, a depth measurement system captures depth data, a seismic sensor captures seismic data, and a data store stores spatial characterising data of the rock fall site. A processor detects a rock fall source location based on the video data, depth data, seismic data; determines a three-dimensional free fall estimation based on the rock fall source location; estimates three-dimensional bounce kinematics based on the three-dimensional free fall estimation and the spatial characterising data of the rock fall site; estimates a runout based on the rock fall source location, free fall and bounce kinematics; and combines the rock fall source location, the three-dimensional free fall, the three dimensional bounce kinematics and the runout to determine a rock fall trajectory.

Abstract: A system for moving an object within an environment, wherein the system includes at least one modular wheel configured to move the object. The modular wheel includes a body configured to be attached to the object, a wheel, a drive configured to rotate the wheel and a controller configured to control the drive. One or more processing devices configured are provided to receive an image stream including a plurality of captured images from each of a plurality of imaging devices, the plurality of imaging devices being configured to capture images of the object within the environment, analyse the images to determine an object location within the environment, generate control instructions at least in part using the determined object location and provide the control instructions to the controller, the controller being responsive to the control instructions to control the drive and thereby move the object.

Abstract: This disclosure relates to analysing rock falls. A video camera captures video data, a depth measurement system captures depth data, a seismic sensor captures seismic data, and a data store stores spatial characterising data of the rock fall site. A processor detects a rock fall source location based on the video data, depth data, seismic data; determines a three-dimensional free fall estimation based on the rock fall source location; estimates three-dimensional bounce kinematics based on the three-dimensional free fall estimation and the spatial characterising data of the rock fall site; estimates a runout based on the rock fall source location, free fall and bounce kinematics; and combines the rock fall source location, the three-dimensional free fall, the three dimensional bounce kinematics and the runout to determine a rock fall trajectory.

Abstract: A system for moving an object within an environment, wherein the system includes at least one modular wheel configured to move the object. The modular wheel includes a body configured to be attached to the object, a wheel, a drive configured to rotate the wheel and a controller configured to control the drive. One or more processing devices configured are provided to receive an image stream including a plurality of captured images from each of a plurality of imaging devices, the plurality of imaging devices being configured to capture images of the object within the environment, analyse the images to determine an object location within the environment, generate control instructions at least in part using the determined object location and provide the control instructions to the controller, the controller being responsive to the control instructions to control the drive and thereby move the object.

Abstract: A toy glider including a shaft, a roller attached to a first end of the shaft, and a housing attached to a second opposing end of the shaft. The roller, a front end portion of the housing, and other portions of the toy glider are interchangeable to create a variety of different designs.

Abstract: A boat propeller comprising a central hub member and an inner hub assembly that defines a longitudinally extending bore having an inner surface. The exterior surface of the central hub member is sized and shaped for disposition therein the bore of the inner hub assembly in a complementary fashion. In one aspect, the propeller may also comprise a plurality of resilient spacer members positioned such that that the exterior surface of the central hub member is spaced from the inner surface of the bore.

Abstract: A boat propeller comprising a central hub member and an inner hub assembly that defines a longitudinally extending bore having an inner surface. The exterior surface of the central hub member is sized and shaped for disposition therein the bore of the inner hub assembly in a complementary fashion. In one aspect, the propeller may also comprise a plurality of resilient spacer members positioned such that that the exterior surface of the central hub member is spaced from the inner surface of the bore.

Abstract: A toy glider including a shaft, a roller attached to a first end of the shaft, and a housing attached to a second opposing end of the shaft. The roller, a front end portion of the housing, and other portions of the toy glider are interchangeable to create a variety of different designs.

Abstract: An improved watercraft propeller is provided with a hub having a plurality of outwardly extending blades, and at least one reverse thrust member connected to a selected blade of the propeller. The blade to which the reverse thrust member is connected can provide a blade pitch that is constant, variable, progressive, or regressive. The reverse thrust member is formed integrally with or connected to a leading edge of the selected blade. The reverse thrust member effectively increases the pitch of the propeller when operated to propel a watercraft in a reverse direction, thereby improving the performance and efficiency of the propeller.