Recently, disk zoning techniques have been widely used for increasing disk drive capacity. As a side effect, data transfer rates for outer zones of a hard disk are much higher than those of inner zones. Without giving proper care to disk zoning features, disk bandwidth cannot be utilized e ectively. In this paper, we propose a data placement scheme for VBR (Variable Bit Rate) video objects, cal...

Throughout this thesis, we are going to work in a hard disk model which is analogue to the setting in [MR09] and [HMR13]. In this model of two-dimensional crystals, every admissible configuration is a hard disk configuration, which, in addition, is a perturbed version of some triangular lattice with side length one. A triangular lattice with side length one is called standard. The objective of ...

This paper extends the standard root locus technique to systems with saturating actuators. This is accomplished by introducing the notion of S-poles, which are the poles of the quasilinear system obtained by applying the method of stochastic linearization to the system with saturation. The path traced by the S-poles on the complex plane when the gain of the controller changes from 0 to ∞ is the...

New calculations of the sixth virial coe cient are presented for binary hard disc mixtures. For each diameter ratio considered, the calculations involve about 1600 9-dimensional integrals. The integrals are evaluated exactly in d dimensions, and approximately, using the Korobov± Conroy number theoretical method, in the other (9­ d ) dimensions, where d is between 4 and 8 for each diagram. The ...

During 1990, in response to the common problem of a filled hard disk, I became obsessed with the idea of producing a compact visualization of directory tree structures. Since the 80 Megabyte hard disk in the HCIL was shared by 14 users it was difficult to determine how and where space was used. Finding large files that could be deleted, or even determining which users consumed the largest share...

The hard disk industry has traditionally stayed competitive by competing on the means of price alone by cutting down aggressively on cost via increase of areal density. Continuing increases in the areal density of hard disk drives will be limited by thermal instability of the thin film medium and is estimated to be limited to about 500Gb/in2 . Patterned media, in which data are stored in an arr...

Data captured by flight data recorders are generally stored on the system’s embedded hard disk. A common problem is the lack of storage space on the disk. This lack of space for data storage leads to either a constant effort to reduce the space used by data, or to increased costs due to acquisition of additional space, which is not always possible. File compression can solve the problem, but ca...

This paper studies rms' decision to start o shore production. I construct a comprehensive panel dataset of 178 rms producing hard disk drives (HDDs) in the world between 1976 and 1998, which records contractual types ( make or buy ), destination countries, and the timing of o shoring as well as rms' organizational forms. I nd that (1) o shorers, particularly earlier ones, survive better in the ...

We present simulations of a hard disc system and analyze the time evolution of the dynamic heterogeneities. We characterize the time evolution of slow regions and slow particles individually. The motion of slow clusters turns out to be very restricted, i.e. a cluster is generated and annihilated in a spatial region four times the size of its maximum extent. The residual motion of the cluster ca...

We develop and characterise new high-performance nano-engineered magneto-optic materials for use in lasermicroscopy-based magnetic field visualisers featuring high sensitivity and resolution, low cost and small size. This type of visualisers will make it possible for forensic experts to recover erased data previously stored in highand ultrahigh-density magnetic disks and hard disk drives.