A buoyancy adjustment device utilizes an inflation valve connected between the diver’s breathing gas supply and a compartment to admit gas into the compartment to increase the diver’s buoyancy. In some examples, the magnetic material may include a relatively high magnetic saturation, such as greater than about 200 emugram, greater than about 242 emugram, or greater than about 250 emugram. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. This enables detection of a misfire state without being hindered from an ion current due to the plasma remaining in the combustion chamber. The process medium is separated from the other materials and removed, leaving behind a finely divided product. Two or more streams of metadata may be aligned and correlated with a media file, facilitating later searching.