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For a long time, tapes have had a single logical partition that was efficiently operated by dedicated software in batch mode. Nowadays, after the introduction of the LTO 5 standard, tapes support logical partitioning and, with the arrival of the Linear Tape File System (LTFS), their contents are exposed through the file system interface as regular files and directories. As a consequence, tape medium...
Conventional magnetic recording media are composed of tiny fundamental magnetizable units, called “grains”, that are random in size and shape. Data are stored on a medium in the form of bits written into evenly spaced bit cells. Writing involves uniformly polarizing all the grains within a bit cell. In the push towards terabit-density magnetic recording, bit cells get smaller and smaller, their size...
We study a model of errors in binary data that arises in terabit-density magnetic recording. Under this model, several bits of the data are replaced by the values of their neighbors on the medium. We consider a simple one-dimensional version of this model, and derive several properties of codes that correct this type of error.
Building information modelling (BIM) is only a tool in the procurement of a building, but it is changing the way the whole process is undertaken. Having a single model which is used by all disciplines requires a different management structure and by consequence a restructuring of the resources required to complete a project.These changes are encompassed in Integrated Practice and more recently Integrated...
The effect of the nonlinear readback process of an MR head on a PRML digital magnetic recording channel was studied. Although the combination of a highly sensitive MR read head and a PRML channel is promising for high areal-density recording, nonlinearity in the MR readback process is a critical issue in the case of a channel in which linearity is assumed. We theoretically analyzed the characteristics...
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