Abstract: A vehicle for conveying racks of goods includes a drop frame trailer having an interior with a rear floor and a front floor, the rear floor being lower than the front floor. An anti-friction device (an array of rollers mounted to the front floor) slopes upwardly to the trailer front. A stop on the front floor is resiliently movable from a first position to a second position, the first position extending vertically above tops of the rollers, and the second position being lower than the first position. A forklift can position a rack of goods on the anti-friction device on the front floor, with the rack depressing the stop from the first position to the second position as the rack is positioned until an opening in the rack is positioned above the stop. The stop can counter a gravitational force which would cause rack movement down the anti-friction device.

Abstract: An exercise mat may include a first portion having first and second opposed ends in a longitudinal direction. The first portion has a lateral dimension in a direction perpendicular to the longitudinal direction. A second portion of the mat has first and second opposed ends in the longitudinal direction. The first end of the second portion may face in a direction of the second end of the first portion. The second portion has a lateral dimension in a direction perpendicular to the longitudinal direction. The lateral dimension of the first portion may be about 50% to about 100% greater that the lateral dimension of the second portion.

Abstract: A query processing system has a query processor and a data manager. The query processor calls the data manager to carry out data access for a query including a filtering operation. The data manager accesses the data in a set of data and before returning the data, initiates a callback to the query processor to determine if the located data meets the filtering criteria. Where the data does not satisfy the filtering criteria, the data manager seeks additional data in the set of data, without having to return the first located data to the query processor.