14-08-2014, 12:43 PM
ON MEMORY OF FUTURE
MEMORY FUTURES.doc (Size: 105.5 KB / Downloads: 11)
Introduction
The upcoming problems requiring very huge computing power make us today looking properly for new technical solutions not only in terms of CPU enhancement but also in terms of other PC components. Regardless of the technology used for CPU production, the data number transferred for processing is determined also by possibilities of other subsystems. Capacity of modern devices of mass memory reflects this tendency. CDs discs allow storing up to 700 MBytes, the developing technology of DVD-ROM - up to 17 GBytes. Technology of magnetic recording develops quickly as well - for the last year the typical capacity of a hard disc in the desktop computers has increased up to 15-20 GBytes and higher. But in the future computers are to process hundreds of gigabytes and even terabytes - much more than any current CDs or hard discs can accommodate. Servicing of such data volumes and their transfer for processing by ultraspeed processors requires completely new approaches when creating storage devices.
What Is Holostore Technology?
A volume holographic storage (holostore) devive is a page oriented devive that writes and reads data in an optical form.The holography technology achieves the necessary high storage densities as well as fast access times. This capability occurs because a holographic image, or hologram, encodes a large block of data as a single entity in a single write operation. Conversely, the process of reading a hologram retrieves the entire data block simultaneously.
How Holographic Storage Works?
Holostore leverages the imaging properties of light and its ability to launched. The reading out of images instead of single bits serially provides a tremendous improvement in the bandwidth. The ability for light to be launched through space and deflected easily will eliminate the need for rotation of the medium. The capability of coherent light to interfere and to form holograms provides a convenient way to address a storage medium in three dimensions, while only scanning the beams in two dimensions.
Holography records the information from a three-dimensional object in such a way that a three dimensional image may be subsequently constructed. Holographic memory uses lasers for both reading and writing the blocks of data into the photosensitive material. A digital hologram is formed by recording the interference pattern between a discretely modulated coherent wave front and a reference beam on a photosensitive material.
Molecular Memory
Another approach in creation of storage devices is a molecular method. A group of researchers of the "W.M. Keck Center for Molecular Electronic" with Professor Robert R. Birge as a head quite a long time ago received a prototype of memory subsystem which uses digital bits of a molecule. These are protein molecules which is called bacteriorhodopsin. It's purple, absorbs the light and presents in a membrane of a microorganism called halobacterium halobium. This bacterium lives in salt bogs where the temperature can reach +150 °C. When a level of oxygen contents is so low in the ambient that to obtain power breathing (oxidation) is not enough, it uses protein for photosynthesis