Measurements have been made of the absorption of ultrasonic waves in liquid sulphur dioxide over the range of frequency from 3 to 45 Mc/s and at temperatures of 0, 25 and 50°C. A pronounced relaxation is found, centred about a frequency of approximately 23 Mc/s; this is associated with the time delay in deactivation of two of the three vibrational modes. The mode which does not participate is that of lowest wave-number which is presumed to be responsible for a relaxation at higher frequencies (of the order of 1500 Mc/s). The results are discussed with reference to dispersion measurements in the gas phase.

In this era of computers, users of storage devices are requesting increased quantities of storage while maintaining or reducing the size of the package. This has meant a reduction in the size of a data bit and increased the susceptability of the media to microscopic defects, which occur in many shapes and sizes and at all stages of media processing. These processes are the machining of the raw substrates, coating the substrates, polishing the media and assembling the media in modules.In the past many of these defects could be overlooked since they didn't introduce missing bits in the read write process. The reason for this was the fact that the recording did not require a high track per inch or bit per inch packing density. Since all media specifications include requirements dealing with the quantity of missing bits or extra bit errors and their sizes; a study of media defects was implemented and the results are presented in this paper.