Blu-ray Disks {Must Read}

Blu-ray Disc (also known as Blu-ray or BD) is an optical disc storage media format. Its main uses are high-definition video and data storage. The disc has the same dimensions as a standard DVD or CD.

The name Blu-ray Disc is derived from the blue laser (violet coloured) used to read and write this type of disc. Because of its shorter wavelength (405 nm), substantially more data can be stored on a Blu-ray Disc than on the DVD format, which uses a red (650 nm) laser. A dual layer Blu-ray Disc can store 50 GB, almost six times the capacity of a double-dual layer DVD (or more than 10 times if single-layer).

Blu-ray Disc was developed by the Blu-ray Disc Association, a group representing consumer electronics, computer hardware, and motion picture production. As of July 30, 2008 more than 720 Blu-ray Disc titles have been released in the United States and more than 460 Blu-ray Disc titles have been released in Japan.

During the high definition optical disc format war, Blu-ray Disc competed with the HD DVD format. On February 19, 2008, Toshiba — the main company supporting HD DVD — announced it would no longer develop, manufacture and market HD DVD players and recorders, leading almost all other HD DVD supporters to follow suit, effectively ending the format war.

The Blu-ray Disc physical specifications were finished in 2004. In January 2005, TDK announced that they had developed a hard coating polymer for Blu-ray Discs. The cartridges, no longer necessary, were scrapped. The BD-ROM specifications were finalized in early 2006. AACS LA, a consortium founded in 2004, had been developing the DRM platform that could be used to securely distribute movies to consumers. However, the final AACS standard was delayed, and then delayed again when an important member of the Blu-ray Disc group voiced concerns. At the request of the initial hardware manufacturers, including Toshiba, Pioneer and Samsung, an interim standard was published which did not include some features, like managed copy.

Do u prefer to buy a Blu-ray instead of a DVD or a CD?? Which will u choose??

Tips to recover scratched CD's

1. Spread a cloth on a flat surface and place the CD on it. 

2. Then, hold the disc with one hand, use the other to wipe the polish into the affected area with a soft cloth.
3. Wait for it to dry and buff using short, brisk strokes along the scratch, not across it.
4. A cloth sold to wipe spectacles or camera lenses will work super m8's.
5. When you can no longersee the scratch,, wash the disc with water and let it dry before playing. Intersting isnt it? Try it right now
I have used toothpaste with good effects before Ive also used car paint cutting compound on deeper scratches. It does leave lots of smaller scratches (as it is a cutting compound after all) but it will remove the worst scratches in most cases.
ya u r gng to b surely benefited by this Operation


* Fingermarks/prints cause 43% of disc problems!
* General wear & tear causes 25% of disc problems!
* Player-related issues cause 15% of disc problems!
* Remaining Others

Map of Mars! - Unbelievable!

Dear Readers,
Can u ever imagine a map with pictures of all places on Mars same as Earth's. Here it is!
Google Mars. With the help of Google Mars you can go through Mars same as Google Earth, Google Moon and Google Sky.
U can access google mars anytime using the link given below. Hope u will enjoy.

Link 4 Google Mars
http://www.google.com/mars/

Link 4 Google Moon
www.google.com/moon

Link 4 Google Sky
www.google.com/sky

Insect eye inspires future vision

An artificial insect eye that could be used in ultra-thin cameras has been developed by scientists in the US.

The dimpled eye contains over 8,500 hexagonal lenses packed into an area the size of a pinhead.

The dome-shaped structure, described in the journal Science, is similar to a bee's eye.

The researchers, from the University of California, Berkeley, say the work may also shed light on how insects developed such complex visual systems.

"Even though insects start with just a single cell, they grow and create this beautiful optical system by themselves," said Professor Luke Lee, one of the authors on the paper.

"I wanted to understand how nature can create layer upon layer of perfectly ordered structures without expensive fabrication technology," he said.

As a result, the team of bioengineers came up with a relatively cheap and easy method for creating the artificial eyes that may in part mimic natural processes.

Image mosaic

Insect eyes, known as compound eyes, usually consist of hundreds of tiny lens-capped optical units, known as ommatidia. For example, a dragonfly has 30,000 of the structures in each eye.

Individual ommatidia guide light through a lens and cone into a channel, known as a rhabdom, which contains light-sensitive cells. These are connected to optical, nerve cells to produce the image.

THE STRUCTURES COMPARED As light passes through the micro lens of the artificial ommatidia, it is focused on a point where photo-chemical changes in the resin automatically generate the cone and the wave-guide

The ommatidia are crammed side by side into bulges that create a wide field of view for the insect.

As each unit is orientated in a slightly different direction, the honeycombed eye creates a mosaic image which, although low in resolution, is excellent at detecting movement.

The team created the artificial eye by first creating a tiny, reusable mould with 8,700 indentations.

The pock-marked hemisphere was then filled with an epoxy resin that reacts when exposed to ultraviolet light to create a harder material with different chemical properties.

After being baked at a low temperature to set the material it can be extracted from the mould.

The result is a pin head sized dome with 8,700 raised humps arranged in a honeycomb pattern across its surface.

Each raised hump acts like a lens, focusing any light into the material below.

Perfect alignment

Over time the concentrated light reacts with the resin to form a cone that guides the light deeper into the structure.

As the light continues to burn a path through the resin it creates a tiny channel, called a wave-guide, which is similar to the rhabdom in an insect's eye.

The reaction of the polymer with the light changes the optical properties of the material meaning that all light that enters the wave-guide is channelled along its length.

The artificial eye mimics structures found in nature Enlarge Image

The result is a tiny resin dome, covered in lenses and pierced by perfectly aligned wave-guides that channel light through the centre of the dome.

As the channels are created as a direct result of light falling on the lens, the researchers believe they could gain insights into the order in which these structures originally formed in insect's eyes.

"To me it makes more sense to have a lens first," said Professor Lee. "I don't think that you formed the visual nervous system first and then it fanned out."

At the moment, the artificial eye is not connected to any kind of imaging device.

'Wonderful images'

However, it could be attached to an image sensor, similar to those used in a digital camera, to complete the setup.

This would allow the eye to be used in tiny, omni-directional surveillance devices, ultra thin cameras or for high-speed motion sensors.

America's military research group, the Defense Advanced Research Projects Agency (Darpa), is interested in the eye and funded some of the research.

Professor Lee also thinks it may have medical applications such as imaging the gut.

"You would swallow this tiny system that also has wireless communication capability," he told the BBC News website.

"So while you are getting these wonderful images inside the body they can be transmitted back outside."

Even further down the line, Professor Lee believes that the work could help develop artificial retinas for the blind.