Compressed waveform data structure is proposed which is suited for segmentation of a plurality of samples of compressed waveform data into a plurality of frames and subsequent storage of each of the frames. Each of the two bottles has an upper opening facing upward and a lower opening facing downward, both sealed by an upper cover and a lower cover, respectively. To operate the lighter, a user must first depress the release button and use an upward movement to release the ignition cover and reveal the gas release mechanism. A singular value decomposition is performed based on the term weights to position a given document in the visual file space based on a relative frequency distribution of terms of the document compared to the occurrence of such terms in a reference corpus.