Magnetic data stored on computer hard disk drives is read and written by small electromagnets on read/write heads that pass over the surfaces of the spinning hard disks [7]. These electromagnets are composed of magnetic alloy cores with wire coils wrapped around them. When an electric current is sent to the coil, a magnetic field is induced in the ferrite core, and data is written to the disk b...

Recently energy consumption becomes an ever critical concern for both low-end and high-end storage server and data centers. A majority of existing energy conservation solutions resort to multi-speed disks. However, current server systems are still built with conventional disks. In this paper, we propose an energy saving policy, eRAID, for conventional disk based RAID-1 systems. eRAID saves ener...

One of the problems in imaging from brain tissues is light-scattering. Thus, multiphoton laser scanning microscopy is widely used to optically access fluorescent signals located deeply in tissues. Here we report that Nipkow-type spinning-disk one-photon confocal microscopy, which embodies high temporal resolution and slow photobleaching, is also capable of imaging tissues to a depth of up to 15...

The entity that emerges from a core is a young star that only vaguely resembles the final version. It is spinning, spotted and oversized. The core and envelope have been shed but a massive disk now dominates the environment. In this chapter, we describe and explore the reasons for the violent behaviour and how it is eventually harnessed. The vast majority of young stars are T Tauri stars. This ...