Abstract: For example, a Machine-Learning (ML) model training system may be configured to shuffle a plurality of input examples in plurality of input blocks to provide a plurality of first-shuffled examples in a plurality of shuffled blocks; and to provide the plurality of first-shuffled examples in the plurality of shuffled blocks as an input to a model training procedure to train an ML model. For example, the model training procedure may include a plurality of epoch iterations applied to a plurality of block groups. For example, an epoch iteration may include determining a block group for the epoch iteration by randomly selecting a group of shuffled blocks from the plurality of shuffled blocks; shuffling first-shuffled examples in the block group to provide a plurality of second-shuffled examples; and updating the ML model according to a plurality of update iterations applied to the plurality of second-shuffled examples.

Abstract: A turbine operated rotary sprinkler comprising a rotary nozzle, a water supply, operated turbine and rotary drive coupling means coupling the turbine to the nozzle so as to impart a rotary drive thereto, the turbine comprising a turbine wheel having a plurality of equiangularly distributed vanes each having a plane of symmetry located along a radial plane of the wheel, a pair of turbine inlets being located with respect to the wheel that water inflow sequentially through the inlets drives the wheel in respectively opposite senses, sealing means being provided for sequentially sealing the turbine inlets, displacement means being provided for displacing the sealing means into sequentially sealing the turbine inlets, displacement actuating and transmission means being provided which comprise an impact member and a rotational range defining member, the latter including a pair of spaced apart abutment elements, one of the members being rotatable with the nozzle and the other of the members being responsively coupl

Abstract: A practice bomb comprised of a hollow two piece plastic shell having lug assemblies therein which aid in retaining the shell halves together notwithstanding the large stresses and strains placed on the bomb during its flight and launching and also releasably suspend the bomb during the transportation of the bomb to the target.

Abstract: A rotating "pop-up" sprinkler assembly having a rectangular buried container unit and a cam follower and cam track for automatically directionally aligning the sprinkler head as it returns to the container to thereby minimize the size of the container.