Provided are new compositions of ruthenates in the pervoskite and layered pervoskite family, wherein the ruthenate compositions exhibit large magnetoresistance and electric-pulse-induced resistance switching effects, the latter observable at room temperature. The apparatus includes an extrusion apparatus that holds plugging material and that has an opening through which the plugging material is extruded. A comparison process is performed to determine a similarity between the trainable semantic vector associated with the dataset and the semantic representation associated with each of the plurality of advertisements. A tamper evidence latch is provided to releasably secure the rim in a closed configuration overlying the open end of the food container. The seat is pivotally connected to the bracket at a pivot point between the two suspension springs. Optical emissions may be distributed on the spectrum by a spectrograph, a monochromator, or a collection of filters, and then fixed by the charge coupled device, a photodiode, or a photomultiplier tube.