Fantastic Invention - Scientists create wireless network with LED room light

Lights are no longer just for lighting up.

Scientists from the Fraunhofer Institute for Telecommunications, Heinrich Hertz Institute (HHI) in Berlin, Germany, have developed a new kind of optical WAN with enough throughput to allow four people in a room to watch a film from the Internet on their laptops, in HD quality.

The technology can potentially be used on both laptops and mobile telephones.

The researchers say they’ve achieved a transfer data rate of 100 megabits per second (Mbit/s) without any losses, using LEDs in the ceiling that light up more than ten square meters (90 square feet). This area also marks the radius in which the receiver — a simple photo diode on the laptop — can be placed before it is out of range.

In lab tests, the team pushed speeds even further using red-blue-green-white light LEDs. Those transmitted data at a blistering 800 Mbit/s, setting a record for VLC or visible light communication.

Klaus-Dieter Langer, the project leader said:  “For VLC the sources of light – in this case, white-light LEDs – provide lighting for the room at the same time they transfer information. With the aid of a special component, the modulator, we turn the LEDs off and on in very rapid succession and transfer the information as ones and zeros.”

The system works because the modulation of the light is imperceptible to the human eye. Langer explains: “The diode catches the light, electronics decode the information and translate it into electrical impulses, meaning the language of the computer.“

While rigging a system to turn LEDs into a transfer medium may not require many components, sending data over light waves is not without challenges. The key one is that whenever on object (like a hand) comes between the light and the photo diode the transfer is impaired.

The HHI scientists stress that the optical WAN is not intended to replace other networks, but rather serve as an additional and low-invasive option in environments where radio transmission networks are not desired or not possible, such as hospital surgical rooms.

“Combinations are also possible, such as optical WLAN in one direction and PowerLAN for the return channel. Films can be transferred to the PC like this and also played there, or they can be sent on to another computer,” notes a release.

The scientists will demonstrate how videos are transmitted by light at the International Telecommunications Fair IFA (Internationale Funkausstellung IFA) in Berlin from September 2-7, 2011.

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Stone Like Optical Disc

Start-up Millenniata and Hitachi-LG have teamed up to create a new optical disc along with a read/write player that will store any data — movies, photos, and music — forever. The disc is compatible with any current DVD or Blu-ray player.
Millenniata calls the product the M-Disc, and claims that it “cannot be overwritten, erased, or corrupted by natural processes.” In fact, if you were so inclined, you can dip it in liquid nitrogen and then boiling water without harming it (See video).
The M-Disc platters resemble typical DVDs and Blu-ray discs in that they are made up of multiple layers of material sans a reflective or dye layer. During the recording process, a laser “etches” permanent pits onto a proprietary rock-like data layer using higher temperatures and as much as five times more energy than ordinary optical discs.

 The platters can be read on any machine that can read a DVD, however, Millenniata’s machine is required to write it. Currently, the discs can store about the same amount of data as a DVD (4.7GB) but only write at 4x or roughly half the speed of today’s DVD players. Plans to ramp up recording speed are underway.

Millenniata will target consumers first when it launches the M-Disc read-write player in early October. After that, the company plans to make a foothold in the long-term data archive market as an alternative to cloud and other storage and backup technologies.

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Travelling in to the Future - A Reality???

Recently i was watching an Documentary on Discovery channel, a very good documentary about Travelling into future by Stephen Hawking. I just want to share this with friends

According to Stephen Hawking, one of the world's smartest physicists, time travel might be possible. Hawking doesn't hold out much hope for time traveling through wormholes, even though he muses about the fantastic conditions that might someday make them work. Nor does he think we'll ever be able to travel back in time, because of paradoxes. His example: "What if a scientist travels back in time and shoots his earlier self? He is now dead. So who fired the shot? It's a paradox."
Traveling forward in time is another matter. Hawking says it would be possible if you could build a gigantic spacecraft, "a truly enormous machine," carrying a huge amount of fuel, enough to accelerate it for six years at full power. That would bring it to a velocity almost as fast as the speed of light.

"At this speed, a single day on board is a whole year of Earth time. Our ship would be truly flying into the future. The slowing of time has another benefit. It means we could, in theory, travel extraordinary distances within one lifetime. A trip to the edge of the galaxy would take just 80 years."

 Unfortunately, this would probably be a one-way trip. Or, this advanced civilization could build a ship with a fuel tank that's many times bigger, and once the ship reaches its destination, it could turn around, accelerating back toward Earth at that same speed. But then by the time they arrive back home, another method of time travel might have already been invented.

If you got any chance to watch that documentary on Discovery channel, watch it calmly.  They are showing variety of methods and explaining how Time travel is possible.

For ex: If we sit in a train which travels at an speed of 3,00,000 Miles per sec., and it rotates the earth 7 times per sec (at its peak speed) at that time inside the train on the law of physics everything becomes slow. so if the train travels 50 years and stops at a place the passengers inside can feel only 7 days in their life. so after a week they board at destination they can see a different world which is 50 years forward. like that the explanations move on. Watch that documentary by searching its time of broadcast.

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Wave Power, Alternative Energy Source

Have u Ever Imagine waves can be useful to generate power. Our Oceans have got a great hidden power with them. For all readers information, i have provided some important information about How Wave's can be used as an alternative energy source

Waves are caused by the wind blowing over the surface of the ocean. In many areas of the world, the wind blows with enough consistency and force to provide continuous waves. There is tremendous energy in the ocean waves. Wave power devices extract energy directly from the surface motion of ocean waves or from pressure fluctuations below the surface.
Wave power varies considerably in different parts of the world, and wave energy can't be harnessed effectively everywhere. Wave-power rich areas of the world include the western coasts of Scotland, northern Canada, southern Africa, Australia, and the northwestern coasts of the United States.

Ocean Wave Energy Technologies

A variety of technologies have been proposed to capture the energy from waves. Some of the more promising designs are undergoing demonstration testing at commercial scales.
Wave technologies have been designed to be installed in nearshore, offshore, and far offshore locations. The OCS Alternative Energy Programmatic EIS is concerned primarily with offshore and far offshore wave technologies. Offshore systems are situated in deep water, typically of more than 40 meters (131 feet).
While all wave energy technologies are intended to be installed at or near the water's surface, they differ in their orientation to the waves with which they are interacting and in the manner in which they convert the energy of the waves into other energy forms, usually electricity. The following wave technologies have been the target of recent development.

Here's an video for ur understanding

 Even though these systems were under continuous testings, in Future due to lot of effort put by scientists human race can surely successful in finding lot of quality alternative energy sources.

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Lot of changes

Lot of changes happened in these 5 years i have stopped writing my Blog. Once again i am going to write about important inventions and technical inventions which are useful for humans. Hope this may be useful for lot of persons.