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30 JANUARY 2012

Will Li-Fi be the new Wi-Fi?

"FLICKERING lights are annoying but they may have an upside. Visible light communication (VLC) uses rapid pulses of light to transmit information wirelessly. Now it may be ready to compete with conventional Wi–Fi.

'At the heart of this technology is a new generation of high–brightness light–emitting diodes,' says Harald Haas from the University of Edinburgh, UK. 'Very simply, if the LED is on, you transmit a digital 1, if it's off you transmit a 0,' Haas says. 'They can be switched on and off very quickly, which gives nice opportunities for transmitting data.'

It is possible to encode data in the light by varying the rate at which the LEDs flicker on and off to give different strings of 1s and 0s. The LED intensity is modulated so rapidly that human eyes cannot notice, so the output appears constant. ...

But some sound a cautious note about VLC's prospects. It only works in direct line of sight, for example, although this also makes it harder to intercept than Wi–Fi. 'There has been a lot of early hype, and there are some very good applications,' says Mark Leeson from the University of Warwick, UK. 'But I'm doubtful it's a panacea. This isn't technology without a point, but I don't think it sweeps all before it, either.'"

(Jamie Condliffe, 28 July 2011)

Jamie Condliffe (2011). New Scientist magazine, 23 July 2011.

Fig.1 Harald Haas, July 2011, TED.com.

2). Steve Perlman "Distributed–Input–Distributed–Output (DIDO) Wireless Technology: A New Approach to Multiuser Wireless".

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TAGS

applied research • bandwidth • broadband over power lines • device • DIDO • DIDO technology • Distributed-Input-Distributed-Output • experimental knowledge • fiber optics • Harald Haas • inventionLEDLED lighting • Li-Fi • LIFI • light • light bulb • lightingphysicsproblem solving researchpulsesignalsolutiontechnology innovation • TED Global • TED Talks • transmitting data • Visible Light Communication • VLC • wireless data • wireless technologies • wireless technology • wireless through LED

CONTRIBUTOR

Simon Perkins
29 JANUARY 2012

Tony Schwartz: The Myths of the Overworked Creative

"The only reserves that last are those we renew. This applies to us personally and ecologically.

Time is finite, but we act as if it were otherwise, assuming that longer hours always lead to increased productivity. But in reality our bodies are designed to pulse and pause – to expend energy and then renew it.

This is a long presentation, but it has many great insights – including the reminder that we are most effective, efficient and creative when we give absorbed attention to one thing at a time. Renewing and cultivating our personal energy is a key criteria for working at our full potential in the 21st century..."

(Nick Potter on 22 January 2012, Intersect)

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TAGS

21st centuryability to focus • absorbed attention • behavioural change • capacity • demand • distraction • effective • efficiencyenergy • expend energy • focus • fully rested • increased productivityinformation overload • multitasking • myths • overloadpause • personal energy • professional experiencepulse • pulse and pause • renew • rising demand • sleep deprive • task-shifting • the overworked creative • wandering mindswork • working

CONTRIBUTOR

Simon Perkins
18 JUNE 2011

MediaArtTube Exhibition 1.0: Biofeedback Art

"Biofeedback art is recently emerged interactive art form which applies technologies to capture biological changes of the body and create an artistic meaning through them. Biofeedback interfaces measures EEG, galvanic skin response, facial analysis, temperature analysis, eye–tracking or hearth rate in order to monitor the users bio–philosophical and produce a dynamic psychological/behavioural/emotion–based analysis of the person. The artistic meaning production based on the applications of these qualities which often deals with embodiment, enaction, body awareness, immersion or active/passive bodily engagement. There are a variety of tools can be used by artists which are usually divided to contact (for example EEG) or non–contact (facial analysis through camera). The MediaArtTube Exhibition 1.0 presents a collection of engaging art works and experiments in this hot topic of media art."

(MediaArtTube)

Fig.1 Brainloop interactive performance platform http://www.aksioma.org/brainloop/index.html

Fig.2 Yasushi Noguchi, Hideyuki Ando – Watch Me!, eye–responsive Installation 2009 http://r–dimension.xsrv.jp/projects_e/watch_me/

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TAGS

actuators • affective art • affective computing • affective environment • applied researchArs Electronica • art works • behavioural analysis • bio art • bio-philosophical analysis • bio-sensors • biofeedback • biofeedback art • biofeedback interfaces • biological changes • blood volume pressure • bodily engagementbodybody awareness • body data • brain • cognitive-based concept • communication devicecomputer interfaceconvergencecorrelative analoguecreative technologydata visualisationdevicedigital art • EEG • electroencephalography • electronic artembodied interactionsembodimentemotion research • emotion-based analysis • erotic ambiguity • external world • eye-trackingfacial analysis • galvanic skin response • graphic representationHCI • heartbeat • hearth rate monitor • humidity • hybrid art • immersioninformation aestheticsinteraction designinteractive artinteractive media artinteractive performanceinteractive visualisationinterface artinterface designkinetic artman machinemeasurementmedia art • MediaArtTube • micro-bio-electrochemical systems • micro-electromechanical • mobile phonenew media artpsychological analysispulse • responsive environment • robotrobot artscreen-based interface • skin conductivity • smell • stroke • sweat • tangible biofeedback • tangible interfacetechnology-based arttemperature analysis • tickle • time-based art • ventilators • vibrationvibratorvirtual realityvirtual worldvisualisation

CONTRIBUTOR

Simon Perkins
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