Smaller, faster, denser and cheaper magnetic disk drives are demanded for information storage using magnetic media. Increase in high areal density in magnetic recording requires small bit cells with very small grain size. The reduction of bit cell volume and grain size will eventually be constrained by the undesirable thermal instability of magnetization due to the superparamagnetic effect, thu...

With the increasing popularity of MBone conferences, the need arose to archive the multimedia streams of these conferences. Like all network applications, a conference recorder is subject to packet loss, which introduces gaps into recorded media streams. Such gaps degrade the playback quality of an archived media stream or even disable the correct playback. In this paper, we present a novel sch...

With the development of information technology, quick rate of data transfer and high capacity of data storage are expected for advanced recording media. Although data storage media and technique have been developed from soft discs, hard disk, CD-ROM and DVDROM to multi-layered blue-ray discs, undoubtedly, holography is one of the most fascinating and attractive techniques. As shown in Figure 1,...

We describe Small Angle Neutron Scattering measurements of the magnetic cluster size distributions for several longitudinal magnetic recording media. We nd that the average magnetic cluster size is slightly larger than the average physical grain size, that there is a broad distribution of cluster sizes, and that the cluster size is inversely correlated to the media signal-to-noise ratio. These ...

Information storage by means of magnetic media is one of the oldest technologies for data recording, since the early prototype of magnetic wire recorder, the ‘‘telegraphone’’, was made by the Danish engineer Valdemar Paulsen in 1898. Magnetic media became very popular in the mid-1900s, with analog recording on audio and video tapes being developed; a milestone was the first digital device for m...

C 23 The CoPtCr-SiO2 medium shows great potential for high-density perpendicular magnetic recording, as it displays excellent signal-to-noise ratio (SNR) characteristics together with high thermal stability. However, significant bit percolation, involving a partial combination with the neighboring magnetic bits, has been observed at a high linear recording density, and has been shown to degrade...

Interaction through meetings is among the richest human communication activities. Recording meetings implies the storage and the structuring of a large set of heterogeneous information scattered over time and media. The raw data format from the various recording devices is not directly usable for the creation of indexes, nor for the content-based access to the relevant parts of the meeting reco...