Topics: Blu-ray Disc, DVD, Computer data storage Pages: 9 (2299 words) Published: April 5, 2013
Blu-Ray Disc
Mir Nazish Hussain S. N. Murthy Kalluri

Dept. of Computer Science & Engg.
Koneru Lakshmaiah College of Engineering,
Vadeeswaram, Guntur.


The thrust for an advanced format of data storage on optical disc led to revolutionary introduction of BLU-RAY DISC. This advances in the race against its competitors DVD (Digital Video Disc) & AOD (Advanced Optical Disc) in that it has high storage capacity, advanced security and privacy features and the A/V high quality O/P (generally video) of the media files stored on it make’s it quite unique & gives an edge over the others, letting BD to be widely adaptable in every application possible. Surprisingly, the necessity for a next generation disc had begun in 1994 even before the advent of the DVD in the market in 1996. The then scientists predicted the limitations of the DVD format & begun working on BD even before DVD's release. This paper essentially is confined with the structure, construction, reading issues & advantages of the Blu-Ray Disc. To be effective, at every stage the disc is compared with DVD.

Computer Memory Based on the Protein Bacteriorhodopsin Utilizing the Two-Photon Method for Read/Write Procedures

N. Raghuramaiah M. Sravan Kumar

Dept. of Computer Science & Engg.

Vignan’s Engineering College,

Vadlamudi, Guntur.


While magnetic and semi-conductorbased information storage devices have been in use since the middle 1950's, today's computers and volumes of information require increasingly more efficient and faster methods of storing data. Whilethe speed of integrated circuit random access memory (RAM)has increased steadily over the past ten to fifteen years, the limits of these systems are rapidly approaching. In response to the rapidly changing face of computing and demand for physically smaller, greater capaticy, bandwidth, a number of alternative methods to integrated circuit information storage have surfaced recently. Among the most promising of the new alternatives are photopolymer-based devices, holographic optical memory storage devices, and protein-based optical memory storage using rhodopsin , photosynthetic reaction centers. To Protein based an experimental means of storing data. Using proteins that respond to light from bacteria found in salt water, a small cube can store large amounts of data. By using lasers the protein can be changed depending on various wave lengths, allowing them to store and recall data. As a result protein can be used to store enormous amounts of data using lasers to read and write binary code. With this new found technology scientists are now developing a larger more efficient storage media.

The ability of molecules to serve as computer switches has been a major area of scientific research since the middle of the last century. Molecular switches, if these become a reality, will offer appreciable reduction in hardware size, since these are themselves very small. One can then imagine of bimolecular computer about 1/20th the size of present-day semiconductor-based computers. Small size and fast operation will account for the development of most modern computers. Several biological molecules are being considered for use in computers, but the bacterial protein-Bacteriorhodopsin (bR)-has generated much interest among scientists. In the past few decades, much research was carried out in several laboratories in North America, Europe, and Japan, and the scientists become successful in building prototype parallel-processing devices, three-dimensional memories, and protein-based neural networks. Bacteriorhodopsin is a light-harvesting protein from bacteria that live in salt marshes that has shown some promise as a feasible optical data storage. The current work is to hybridize this biological molecule with the solid statecomponents of a typical computer.

Cryptography and...
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