Abstract: A test fixture for identifying the sweet spot of a bat includes one or more vibration absorbers, which may include cuffs, caps, and cuff/accelerometer combinations. An impact mass driven by motors strikes the bat at a series of locations along the barrel of the bat while the magnitude of vibration at the handle of the bat is measured by an accelerometer. The sweet spot is identified based on the minimum of the maximum measured acceleration values. The vibration absorbers inhibit gross movement of the bat and accelerate quiescence of oscillatory vibration of the bat between strikes, thereby reducing test time and increasing accuracy.

Abstract: A delivery system and a method of delivering articles are provided. The system has a secure box having a planar top wall and a cylindrical sidewall, and a reclosable opening in the top wall, at least one reclosable opening in the sidewall. The system is configured to open the top wall opening for receiving an article into the secure box and for closing and locking the top wall opening, upon the article being received in the secure box. A round conveyor having at least two partitions and is configured and disposed to hold the article and to rotate and dispose the article proximate the sidewall opening for a recipient of the article.

Abstract: An impact label for use as a baseball training aid includes a deformable layer and an incompressible layer which may include aluminum foil and paper, respectively. The incompressible layer includes voids distributed in a regular pattern. A first side of the incompressible layer is adhered to the deformable layer. A second side of the incompressible layer is formed around the barrel of a baseball bat, e.g., via an adhesive on a base layer. Areas of the deformable layer proximate to the voids and within an area of contact with a baseball during a swing of the bat are adapted to deform in response to contact with the baseball, thereby creating dimples that are indicative of the area of contact and force of contact.

Abstract: A steering system for a snowboard includes two binding interface pods, one of which may be active and one of which may be passive. Rotation or tilting of a top plate of the active binding interface pod in response to rotation or tilting of the rider's steering foot causes counter-rotation of a steering fin under the rider's steering foot. The passive binding interface pod is responsive via a linkage between the active and passive binding interface pods to cause rotation of a steering fin under the rider's non-steering foot. Coordinated counter-rotation of the steering fins causes the board to turn in the direction of rotation of the rider's steering foot when the steering fins are unaligned. Optionally, both binding pods may be active in steering, i.e. enabling two footed steering.

Abstract: A test fixture for identifying the sweet spot of a bat suspends the bat in a vertical orientation via a fixed pivot point and limits rotational movement of the bat to a single plane. A pendulum with an impact mass is caused to contact the bat at various locations along the barrel of the bat at a fixed velocity. Rotational movement of the impact mass is limited to the single plane. Peak acceleration is measured proximate to the handle of the bat. The sweet spot is identified based on measured minimum peak acceleration. For example, if there is a single measured minimum peak acceleration then the corresponding contact location at the barrel is the sweet spot. If there are multiple measured minimum peak acceleration instances then a center or average contact location of those instances in identified as the sweet spot.

Abstract: A steering system for a snowboard includes two binding interface pods, one of which may be active and one of which may be passive. Rotation or tilting of a top plate of the active binding interface pod in response to rotation or tilting of the rider’s steering foot causes counter-rotation of a steering fin under the rider’s steering foot. The passive binding interface pod is responsive via a linkage between the active and passive binding interface pods to cause rotation of a steering fin under the rider’s non-steering foot. Coordinated counter-rotation of the steering fins causes the board to turn in the direction of rotation of the rider’s steering foot when the steering fins are unaligned. Optionally, both binding pods may be active in steering, i.e. enabling two footed steering.

Abstract: An impact label for use as a baseball training aid includes a deformable layer and an incompressible layer which may include aluminum foil and paper, respectively. The incompressible layer includes voids distributed in a regular pattern. A first side of the incompressible layer is adhered to the deformable layer. A second side of the incompressible layer is formed around the barrel of a baseball bat, e.g., via an adhesive on a base layer. Areas of the deformable layer proximate to the voids and within an area of contact with a baseball during a swing of the bat are adapted to deform in response to contact with the baseball, thereby creating dimples that are indicative of the area of contact and force of contact.

Abstract: A steering system for a snowboard includes two binding interface pods, one of which may be active and one of which may be passive. Rotation or tilting of a top plate of the active binding interface pod in response to rotation or tilting of the rider's steering foot causes counter-rotation of a steering fin under the rider's steering foot. The passive binding interface pod is responsive via a linkage between the active and passive binding interface pods to cause rotation of a steering fin under the rider's non-steering foot. Coordinated counter-rotation of the steering fins causes the board to turn in the direction of rotation of the rider's steering foot when the steering fins are unaligned. Optionally, both binding pods may be active in steering, i.e. enabling two footed steering.

Abstract: A delivery system and a method of delivering articles are provided. The system has a secure box having a planar top wall and a cylindrical sidewall, and a reclosable opening in the top wall, at least one reclosable opening in the sidewall. The system is configured to open the top wall opening for receiving an article into the secure box and for closing and locking the top wall opening, upon the article being received in the secure box. A round conveyor having at least two partitions and is configured and disposed to hold the article and to rotate and dispose the article proximate the sidewall opening for a recipient of the article.

Abstract: A steering system for a snowboard includes two binding interface pods, one of which may be active and one of which may be passive. Rotation or tilting of a top plate of the active binding interface pod in response to rotation or tilting of the rider's steering foot causes counter-rotation of a steering fin under the rider's steering foot. The passive binding interface pod is responsive via a linkage between the active and passive binding interface pods to cause rotation of a steering fin under the rider's non-steering foot. Coordinated counter-rotation of the steering fins causes the board to turn in the direction of rotation of the rider's steering foot when the steering fins are unaligned. Optionally, both binding pods may be active in steering, i.e. enabling two footed steering.

Abstract: A steering system for a snowboard includes two binding interface pods, one of which may be active and one of which may be passive. Rotation or tilting of a top plate of the active binding interface pod in response to rotation or tilting of the rider's steering foot causes counter-rotation of a steering fin under the rider's steering foot. The passive binding interface pod is responsive via a linkage between the active and passive binding interface pods to cause rotation of a steering fin under the rider's non-steering foot. Coordinated counter-rotation of the steering fins causes the board to turn in the direction of rotation of the rider's steering foot when the steering fins are unaligned. Optionally, both binding pods may be active in steering, i.e. enabling two footed steering.

Abstract: A test fixture for identifying the sweet spot of a bat suspends the bat in a vertical orientation via a fixed pivot point and limits rotational movement of the bat to a single plane. A pendulum with an impact mass is caused to contact the bat at various locations along the barrel of the bat at a fixed velocity. Rotational movement of the impact mass is limited to the single plane. Peak acceleration is measured proximate to the handle of the bat. The sweet spot is identified based on measured minimum peak acceleration. For example, if there is a single measured minimum peak acceleration then the corresponding contact location at the barrel is the sweet spot. If there are multiple measured minimum peak acceleration instances then a center or average contact location of those instances in identified as the sweet spot.

Abstract: A steering system for a snowboard includes two binding interface pods, one of which may be active and one of which may be passive. Rotation or tilting of a top plate of the active binding interface pod in response to rotation or tilting of the rider's steering foot causes counter-rotation of a steering fin under the rider's steering foot. The passive binding interface pod is responsive via a linkage between the active and passive binding interface pods to cause rotation of a steering fin under the rider's non-steering foot. Coordinated counter-rotation of the steering fins causes the board to turn in the direction of rotation of the rider's steering foot when the steering fins are unaligned. Optionally, both binding pods may be active in steering, i.e. enabling two footed steering.

Abstract: An artificial turf for golf mimics visual and physical aspects of natural turf. The artificial turf includes a resilient, slow recovery, foam layer that temporarily deforms proximate to where the club head contacts the artificial turf during a swing, thereby allowing an uninterrupted swing arc with a descending angle of attack and forming a virtual divot cavity that mimics physical aspects of a natural turf divot. Trans-chromic synthetic grass blades on the surface of the artificial turf exhibit a temporary color change caused by contact with the club head during a swing, thereby forming a virtual divot cavity that mimics visual aspects of a natural turf divot. The slow recovery foam and trans-chromic grass blades enable analysis of the golf swing based on the virtual divot. The artificial turf may be incorporated into a practice mat.

Abstract: The invention provides a system for creating a prescribed vibration profile on a mechanical device comprising a sensor for measuring an operating condition of the mechanical device, a circular force generator for creating a controllable rotating force vector comprising a controllable force magnitude, a controllable force phase and a controllable force frequency, a controller in electronic communication with said sensor and said circular force generator, the controller operably controlling the controllable rotating force vector, wherein the difference between the measured operating condition and a desired operating condition is minimized.

Abstract: A computer-implemented method of assessing depth-of-understanding is disclosed. The method may comprise receiving a target response associated with a question. The method may comprise receiving a learner response associated with the question and calculating a total relevancy score for each of the learner responses by determining a relevancy score with respect to each word, keyword, and keyphrase in the target response text and in light of all learner responses, and summing all relevancy scores determined for each learner response. The method may also comprise assigning each of the learner responses to one of a plurality of tiers based upon which tier contains the total relevancy score of the learner response and sending to a facilitator client device an assessed response for each of the learner responses. The assignment of each of the learner responses to one of the tiers may be substantially concurrent with the receipt of the learner response.

Abstract: Apparatus and vibratory separators having a base, a separator housing movably connected with the base, the separator housing including a top having an inlet chute, a bottom having a liquid discharge chute, a cylindrical sidewall defining an axial centerline and having a discharge spout, and at least one screen mounted within the separator housing. A vacuum system proximate the at least one screen may also be incorporated. The apparatus further includes at least one circular force generator (CFG) disposed on the separator housing, and at least one sensor positioned on the apparatus for measuring an operating function associated with and enabled by the vibration profile, and a controller in electronic communication with the sensor and with the at least one CFG. The difference between the measured operating function and the prescribed operating function is reduced. The apparatus may also include at least one CFG having a plurality of imbalanced masses which rotate in a plane parallel the axial centerline.

Abstract: The invention provides a system for creating a prescribed vibration profile on a mechanical device comprising a sensor for measuring an operating condition of the mechanical device, a circular force generator for creating a controllable rotating force vector comprising a controllable force magnitude, a controllable force phase and a controllable force frequency, a controller in electronic communication with said sensor and said circular force generator, the controller operably controlling the controllable rotating force vector, wherein the difference between the measured operating condition and a desired operating condition is minimized.

Abstract: Apparatus and vibratory separators having a base, a separator housing movably connected with the base, the separator housing including a top having an inlet chute, a bottom having a liquid discharge chute, a cylindrical sidewall defining an axial centerline and having a discharge spout, and at least one screen mounted within the separator housing. A vacuum system proximate the at least one screen may also be incorporated. The apparatus further includes at least one circular force generator (CFG) disposed on the separator housing, and at least one sensor positioned on the apparatus for measuring an operating function associated with and enabled by the vibration profile, and a controller in electronic communication with the sensor and with the at least one CFG. The difference between the measured operating function and the prescribed operating function is reduced. The apparatus may also include at least one CFG having a plurality of imbalanced masses which rotate in a plane parallel the axial centerline.