Abstract: Disclosed is a system to determine a first contact probability for each of a plurality of time slots for each of a plurality of first accounts using a trained machine learning model based on a first set of account information and first contact attempt logs, determine a first prioritization for each of a plurality of first accounts based on a second set of account information, and generate a contact schedule based on the first contact probability for each of the plurality of time slots and the first prioritization. The trained machine learning model is trained based on training accounts.

Abstract: A drive-over conveyor for unloading fracking sand is designed to be towed as a highway semi-trailer includes a center frame structure containing a conveyor belt with two pivotal ramps on each side to be moved to a raised position standing upwardly and a lowered position extending outwardly. The ramps have sufficient length and the center structure has a low height to allow a highway semi-trailer to pass over a grate in the center structure. A platform is attached at the forward end with a king pin on the underside for engaging a towing platform of a highway tractor. A wheel and axle assembly including suspension of the axle for highway travel is mounted on a sub-frame pivotal relative to main rear frame for movement relative to the center frame structure from a lowered road position to a raised position allowing the center frame structure to rest on the ground.

Abstract: A drive-over conveyor for unloading fracing sand is designed to be towed as a highway semi-trailer includes a center frame structure containing a conveyor belt with two pivotal ramps on each side to be moved to a raised positon standing upwardly and a lowered position extending outwardly. The ramps have sufficient length and the center structure has a low height to allow a highway semi-trailer to pass over a grate in the center structure. A platform is attached at the forward end with a king pin on the underside for engaging a towing platform of a highway tractor. A wheel and axle assembly including suspension of the axle for highway travel is mounted on a sub-frame pivotal relative to main rear frame for movement relative to the center frame structure from a lowered road position to a raised position allowing the center frame structure to rest on the ground.