Abstract: The invention relates to systems, apparatus, and methods for determining position and/or motion of an object, for example, in relation to a pathway and/or another object on the pathway. In one aspect the invention comprises a method (e.g. a computer implemented method) for determining a position and/or motion (e.g. speed and/or acceleration and/or direction of motion etc.) of at least one object (e.g. a person and/or vehicle etc.) moving along a pathway (e.g. in relation to another e.g. a second object, optionally of the same type, (e.g. a person and/or vehicle etc.) moving along a pathway, optionally in a virtual environment), the method comprising: providing, or establishing, at least one pathway (e.g. at least two, preferably a network of pathways); dividing the at least one pathway into a series of (e.g. at least two) pathway elements along the at least one pathway; and, in which at least one (e.g.

Abstract: An apparatus including a drill collar having an outer surface, an assembly for interaction with an earth formation coupled to the drill collar, the assembly including a first member to extend beyond the drill collar outer surface and a second member to extend beyond the first member and toward the earth formation to receive formation fluids. An apparatus including an MWD tool having an outer surface, a formation testing assembly coupled to the MWD tool, the formation testing assembly recessed beneath the outer surface in a first position and including a piston to extend beyond the outer surface to a second position and an inner sampling member to extend beyond the piston to a third position.

Abstract: A baffle for a heat exchanger tube extending between opposed header pipes. The baffle is a longitudinal member with a concave underside shape conforming to the convex circumferential shape of the heat exchanger tube, and has a length substantially equal to the distance between the header pipes. A lip having a convex top side shape conforming to the concave underside shape of the longitudinal member extends along one longitudinal edge of the member. Two such members can be nested together by overlaying the non-lipped longitudinal edge of a one member atop the lipped longitudinal edge of the other member. A plurality of longitudinally aligned heat vent slits extend substantially the entire length of an uppermost portion of the member.