This paper uses the PES Pareto Method[1] and measurement techniques for isolating noise sources[2] to decompose the Position Error Signal (PES) of a Lynx II hard disk drive manufactured by Hewlett-Packard. This accomplishes three things: it demonstrates the utility of the PES Pareto Method in a practical example, it allows us to discover which noise sources are insignificant to PES, and it iden...

a gyroscope is a device for measuring or maintaining orientation , based on the principles of conservation of angular momentum . the device is a spinning wheel or disk whose axle is free to take any orientation. this orientation changes much less in response to a given external torque than it would without the large angular momentum associated with the gyroscope's high rate of spin. since exter...

It is clear that the fastest memory levels are substantially smaller than the slowest ones. Generally, each level has a direct connection to the level immediately below it. (In addition, the faster, smaller levels are substantially more expensive to produce, so do not expect 1GB of register space any time soon.) Additionally, many of the levels communicate in blocks. For example, asking RAM to ...

Solid State Disk technologies are increasingly replacing high-speed hard disks as the storage technology in high-random-I/O environments. There are several potentially I/O bound services within the typical LHC Tier-2 in the back-end, with the trend towards many-core architectures continuing, worker nodes running many single-threaded jobs and storage nodes delivering many simultaneous files can ...

Ioana Duţan1,3 and Peter L. Biermann2,3 1University of Bucharest, Faculty of Physics Str. Atomiştilor, 405, RO-76900, Bucureşti-Mǎgurele, România 2University of Bonn Regina-Pacis-Weg, 3, D-53113, Bonn, Germany 3Max-Planck-Institute for Radioastronomy Auf dem Hűgel, 69, D-53121, Bonn, Germany [email protected]; [email protected] Abstra t The e ien y of a rapidly spinning Kerr b...

In the general accretion disk model theory, surrounding an astronomical object comprises fluid rings obeying Keplerian motion. However, we should consider relativistic and rotational effects as close in toward center of spinning compact massive objects such a black hole or neutron star. this study, explore geometry inner portion context Mukhopadhyay’s pseudo-Newtonian potential approximation fo...