The present invention provides for compounds of formula wherein A1, A2, A3, A4, X1, X2, Y1, L1, G1, Rx, and Ry have any of the values defined thereof in the specification, and pharmaceutically acceptable salts thereof, that are useful as agents in the treatment of diseases and conditions, including inflammatory diseases, cancer, and AIDS. A directional antenna is used to review a first channel selection, whereby said first channel is selected from a first group of channels of said plurality of channels available for communication between a first and a second subscriber station of said plurality of subscriber stations. One or more of the stakes has notches that can receive the flexible tie after it is passed around the animal’s neck, so that the stake acts as a handle for dragging the animal along the ground. At least one common route is ascertained from the set of routes, wherein the locations in each common route include all of the locations on the path. The present electret materials may also comprise a further additive selected from the group consisting of the hindered amine light stabilizers, the hydroxyphenylalkylphosphonic esters or monoesters and the aromatic trisamide nucleating agents. The structure of the rod is made up of fibers and optionally a load of particles embedded in a resinous matrix giving the working surface of the rod a continuous abrasive power.