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Li-Fi

Li-Fi
Li-1st, the first Li-Fi equipment Li-Fi, as coined by Prof. Harald Haas during his TED Global talk,[1] is bidirectional, high speed and fully networked wireless communications, like Wi-Fi, using light. Li-Fi is a subset of optical wireless communications (OWC) and can be a complement to RF communication (Wi-Fi or Cellular network), or a replacement in contexts of data broadcasting. It is wireless and uses visible light communication or infra-red and near ultraviolet (instead of radio frequency waves), part of Optical wireless communications technology, which carries much more information, and has been proposed as a solution to the RF-bandwidth limitations.[2] A complete solution includes an industry led standardization process. Technology details[edit] Visible light communications (VLC) works by switching bulbs on and off within nanoseconds,[6] which is too quickly to be noticed by the human eye. History[edit] Standards[edit] The standard defines three PHY layers with different rates:

http://en.wikipedia.org/wiki/Li-Fi

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Visible Light Communication devices ready for commercialization Outstanding Technology has developed two commercial products using visible light communication technology, using LED lights to transmit data. These are a location service for smartphones, called the Commulight System, and a visible light transceiver, the TR01. The Commulight System consists of a receiver that plugs into a smartphone or tablet, and LED lights with a built-in transmitter. The receiving device obtains IDs emitted by the LED lights, enabling it to download content relevant to the user's location. The receiver is available in two types, one that connects via USB, and one that connects via the headphone jack. "The most obvious application for this system is guiding visitors in galleries and museums.

Journal of Neural Engineering Dominique M Durand et al 2014 J. Neural Eng. 11 020201 Neural engineers have made significant, if not remarkable, progress in interfacing with the nervous system in the last ten years. In particular, neuromodulation of the brain has generated significant therapeutic benefits [1–5]. EEG electrodes can be used to communicate with patients with locked-in syndrome [6].

Visible Light Communications One only needs to read some of the daft comments posted at the foot of online visible light comms articles to understand that there are a large number of misconceptions out there. Here is my Li-Fi myth buster top 10. 1. The lights flicker. We subtly modulate the current supply to the LED devices at relatively high speeds. Mind Reading (Neural Decoding) Goes Mainstream Surfdaddy Orca November 9, 2009 In the new movie, The Men Who Stare at Goats, reporter Bob Wilton confronts Special Forces operator Lyn Cassady, “I’ve heard that you’re a psychic spy.” Lyn later comments, “We’re Jedi. We don’t fight with our guns, we fight with our minds.” Mind reading – formerly the stuff of science fiction and crystal gazers – is rapidly becoming science fact.

Professor Harald Haas A light-based wireless communication network developed by Edinburgh-based mobile communication specialist pureLiFi could become an essential tool for Government and business in combating terrorism and cyber crime. The pureLiFi system offers a new and secure way of exchanging information over networks, using light rather than radio waves to communicate between devices. The pureLiFi system offers a new and secure way of exchanging information over networks, using light rather than radio waves to communicate between devices The new light-based communication technology, known as Li-Fi, could provide a substantially increased solution to enhance data security for businesses seeking to improve data protection – from Government and defence organisations through to financial, public sector, pharmaceutical or any ‘high data risk’ industries. By exploiting specific properties of light, the Li-Fi system prevents both sides of the communications link being intercepted. Professor Harald Haas

OpenEEG project About the project Many people are interested in what is called neurofeedback or EEG biofeedback training, a generic mental training method which makes the trainee consciously aware of the general activity in the brain. This method shows great potential for improving many mental capabilities and exploring consciousness. Other people want to do experiments with brain-computer interfaces or just want to have a look at their brain at work. Unfortunately, commercial EEG devices are generally too expensive to become a hobbyist tool or toy. The OpenEEG project is about making plans and software for do-it-yourself EEG devices available for free (as in GPL).

Project Li-Fi Eric Packman, August 10, 2013 #hwdesigncontest #buildsomething My project was an attempt to replace my old nemesis, wifi, with an alternative that's safe, secure, fast and not prohibited by the CRTC. Photoshop For Beginners: 6 techniques to extract anything from its background This is the second of a series of tutorials thought for Photoshop beginners. I’ll explain in depth those features that can result difficult to understand for a newbi. Today I’ll show you 6 techniques you can use to extract a person/object from its background. From now on extraction won’t have secrets for you! Extraction is one of the worst enemies for those who start using Photoshop.

'Li-fi' via LED light bulb data speed breakthrough 28 October 2013Last updated at 09:10 ET By Matthew Wall Technology reporter, BBC News Micro-LEDs can transmit large amounts of digital data in parallel UK researchers say they have achieved data transmission speeds of 10Gbit/s via "li-fi" - wireless internet connectivity using light. The researchers used a micro-LED light bulb to transmit 3.5Gbit/s via each of the three primary colours - red, green, blue - that make up white light. This means over 10Gbit/s is possible.

'Uncrackable' codes set for step up 4 September 2013Last updated at 13:09 ET By Melissa Hogenboom Science reporter, BBC News Quantum cryptography is a way to share secret digital keys A system that allows electronic messages to be sent with complete secrecy could be on the verge of expanding beyond niche applications. A team of British scientists has discovered a way to build communications networks with quantum cryptography at a larger scale than ever before. Quantum cryptography has the potential to transform the way sensitive data is protected. Details appear in Nature journal. High-Speed Internet from the Ceiling Lamp - Fraunhofer HHI The technology developed by HHI makes it possible to use standard off-the-shelf LED room lights for data transmission. Data rates of up to 800 Mbit/s were reached by this optical WLAN under laboratory conditions, while a complete real-time system exhibited at trade fairs reached data throughput of 500 Mbit/s. The newly developed patent protected components have now achieved a transmission rate in laboratory experiments of over 1 Gbit/s per single light frequency. As off-the-shelf LEDs mainly use three light frequencies or light colors, speeds of up to 3 Gbit/s are feasible. Thus far LEDs could only be used with a bandwidth of around 30 MHz, yet the new technical components enable exploitation of a much higher bandwidth of up to 180 MHz. As the higher frequency bands are also used for transmission, this significantly boosts the data throughput rate.

12 Things That The Mainstream Media Is Being Strangely Quiet About Right Now As the mainstream media continues to be obsessed with Anthony Weiner and his bizarre adventures on Twitter, much more serious events are happening around the world that are getting very little attention. In America today, if the mainstream media does not cover something it is almost as if it never happened. Right now, the worst nuclear disaster in human history continues to unfold in Japan , U.S. nuclear facilities are being threatened by flood waters, the U.S. military is bombing Yemen, gigantic cracks in the earth are appearing all over the globe and the largest wildfire in Arizona history is causing immense devastation. But Anthony Weiner, Bristol Palin and Miss USA are what the mainstream media want to tell us about and most Americans are buying it. In times like these, it is more important than ever to think for ourselves. The corporate-owned mainstream media is not interested in looking out for us.

Orthogonal frequency-division multiplexing Orthogonal frequency-division multiplexing (OFDM) is a method of encoding digital data on multiple carrier frequencies. OFDM has developed into a popular scheme for wideband digital communication, whether wireless or over copper wires, used in applications such as digital television and audio broadcasting, DSL Internet access, wireless networks, powerline networks, and 4G mobile communications. Example of applications[edit] The following list is a summary of existing OFDM based standards and products. Amazing low-tech harvester collects water from even the driest of air Even in places where there’s a severe lack of water, there’s one thing every place has. Air. And even in the most arid of climes, there’s moisture in the air, even if it’s not enough to be felt on your skin. So there’s water everywhere, it’s just a matter of getting to it, and that’s what Edward Linnacre did with his brilliantly simple low tech air harvester called the Airdrop. With a deceptively modest design, Airdrop filters hot environmental air through a turbine, feeding it through a copper tubing system—with copper wool to maximize surface area—and into the earth where it cools and releases moisture.

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