A fuel injector having an injector body, a mixing circuit, and at least one injector is provided. Each one of the plurality of logical array blocks include a plurality of logic elements capable of communicating with each other through interconnections defined within each logical array block. Compounds are provided that inhibit PI3K\u03b4 activity, including compounds that selectively inhibit PI3K\u03b4 activity. The first amplifier is configured to receive and amplify the set of first attenuated echo signals to thereby generate a set of first amplified echo signals corresponding to the one or more first attenuated echo signals, respectively. In one embodiment, a method of forming a stacked device filler comprises forming a material layer between two or more substrates of a stacked device, and causing a reaction in at least a portion of the material, wherein the reaction may comprise polymerization, and the material layer may be one or a combination of materials, such as nonconductive polymer materials, for example.