Abstract: A calibration device is disclosed for hyper-frequency adjustment of the reference planes of an apparatus for measuring the dispersion parameters of elements of circuits integrated on a substrate. The device includes, integrated on the same substrate, standard patterns and accesses to these patterns which are compatible with the contacts of two test probes connected to the apparatus. Also provided on the substrate are at least two identical series of standard patterns which are formed by parallel lines of the same length, including a short-circuit line and/or an open line and/or a load line, whose accesses are aligned within each series, but opposed from one series to another with respect to the zone in which the second ends are situated. Their second ends are aligned within each series, defining the facing reference planes, separated by a given distance d.

Abstract: A cover is disclosed for preventing impingement of solar radiation, rain, sleet, snow, and dust upon the contents of a shopping cart and which in addition provides glow-in-the-dark advertising indicia disposed on the cover. The cover comprises a trapeloidal sheet member having a first top edge and a second top edge interconnected by a third top edge. The top member has connected to it first and second rectangular sheet members connected to the first and second top edges respectively, the first and second sheet members being interconnected by a third rectangular sheet member attached to the third edge of the trapeloidal sheet member. The first and second sheet members are disposed on opposite sides of the shopping cart and have attached thereto strips of a material such as Velcro or a string or a rope material, for example, which are connected so as to secure the cover to the shopping cart.