Posts Tagged ‘University of Cambridge’

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Cambridge University wants to take its flexible opals to market

Thursday, May 30th, 2013

Structural colour due to nanoscale structures such as those found on Morpho butterfly wings, jewel beetles, opals, and elsewhere is fascinating to me (Feb. 7, 2013 posting). It would seem many scientists share my fascination  including these groups at the UK’s University of Cambridge and Germany’s Fraunhofer Institute, from the May 30, 2013 University of Cambridge news release (also on EurekAlert),

Instead of through pigments, these ‘polymer opals’ get their colour from their internal structure alone, resulting in pure colour which does not run or fade. The materials could be used to replace the toxic dyes used in the textile industry, or as a security application, making banknotes harder to forge. Additionally, the thin, flexible material changes colour when force is exerted on it, which could have potential use in sensing applications by indicating the amount of strain placed on the material.

The most intense colours in nature – such as those in butterfly wings, peacock feathers and opals – result from structural colour. While most of nature gets its colour through pigments, items displaying structural colour reflect light very strongly at certain wavelengths, resulting in colours which do not fade over time.

In collaboration with the DKI (now Fraunhofer Institute for Structural Durability and System Reliability) in Germany, researchers from the University of Cambridge have developed a synthetic material which has the same intensity of colour as a hard opal, but in a thin, flexible film.

Here’s what the researchers’ synthetic opal looks like,

Polymer Opals Credit: Nick Saffel [downloaded from http://www.cam.ac.uk/research/news/flexible-opals]

Polymer Opals Credit: Nick Saffel [downloaded from http://www.cam.ac.uk/research/news/flexible-opals]

The news release provides a brief description of naturally occurring opals and contrasts them with the researchers’ polymer opals,

Naturally-occurring opals are formed of silica spheres suspended in water. As the water evaporates, the spheres settle into layers, resulting in a hard, shiny stone. The polymer opals are formed using a similar principle, but instead of silica, they are constructed of spherical nanoparticles bonded to a rubber-like outer shell. When the nanoparticles are bent around a curve, they are pushed into the correct position to make structural colour possible. The shell material forms an elastic matrix and the hard spheres become ordered into a durable, impact-resistant photonic crystal.

“Unlike natural opals, which appear multi-coloured as a result of silica spheres not settling in identical layers, the polymer opals consist of one preferred layer structure and so have a uniform colour,” said Professor Jeremy Baumberg of the Nanophotonics Group at the University’s Cavendish Laboratory, who is leading the development of the material.

Like natural opals, the internal structure of polymer opals causes diffraction of light, resulting in strong structural colour. The exact colour of the material is determined by the size of the spheres. And since the material has a rubbery consistency, when it is twisted and stretched, the spacing between spheres changes, changing the colour of the material. When stretched, the material shifts into the blue range of the spectrum, and when compressed, the colour shifts towards red. When released, the material will return to its original colour.

I find the potential for use in the textile industry a little more interesting than the anti-counterfeiting application. (There’s a Canadian company, Nanotech Security Corp., a spinoff from Simon Fraser University, which capitalizes on the Blue Morpho butterfly wing’s nanoscale structures for an anti-counterfeiting application as per my first posting about the company on Jan. 17, 2011.) There has been at least one other attempt to create a textile that exploits structural colour. Unfortunately Teijin Fibres has stopped production of its morphotex, as per my April 12, 2012 posting.

Here’s what the news release has to say about textiles and the potential importance of structural colour,

The technology could also have important uses in the textile industry. “The World Bank estimates that between 17 and 20 per cent of industrial waste water comes from the textile industry, which uses highly toxic chemicals to produce colour,” said Professor Baumberg. “So other avenues to make colour is something worth exploring.” The polymer opals can be bonded to a polyurethane layer and then onto any fabric. The material can be cut, laminated, welded, stitched, etched, embossed and perforated.

The researchers have recently developed a new method of constructing the material, which offers localised control and potentially different colours in the same material by creating the structure only over defined areas. In the new work, electric fields in a print head are used to line the nanoparticles up forming the opal, and are fixed in position with UV light. The researchers have shown that different colours can be printed from a single ink by changing this electric field strength to change the lattice spacing.

As for wanting to take this research to market, from the news release,

Cambridge Enterprise, the University’s commercialisation arm, is currently looking for a manufacturing partner to further develop the technology and take polymer opal films to market.

For more information, please contact sarah.collins@admin.cam.ac.uk.

The reference to opals reminded me of yet another Canadian company exploring the uses of structural colour, Opalux, as per my Jan. 31, 2011 posting.

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Posted in biomimcry, business, nanotechnology | No Comments »

Structure of color

Thursday, February 7th, 2013

AGELESS BRILLIANCE: Although the pigment-derived leaf color of this decades-old specimen of the African perennial Pollia condensata has faded, the fruit still maintains its intense metallic-blue iridescence.COURTESY OF P.J. RUDALL [downloaded from http://www.the-scientist.com/?articles.view/articleNo/34200/title/Color-from-Structure/]

AGELESS BRILLIANCE: Although the pigment-derived leaf color of this decades-old specimen of the African perennial Pollia condensata has faded, the fruit still maintains its intense metallic-blue iridescence.COURTESY OF P.J. RUDALL [downloaded from http://www.the-scientist.com/?articles.view/articleNo/34200/title/Color-from-Structure/]

Hard to believe those berries were collected more than four decades ago, according to Cristina Luiggi in her Feb. 1, 2013 article, Color from Structure, for The Scientist magazine. Her focus is on biological nanostructures and it is a fascinating article which I urge you to read in its entirety if you have the time and this kind of thing interests you. As you can see, the pictures are great.

Here are a few excerpts from the piece,

Colors may be evolution’s most beautiful accident. Spontaneous mutations that perturbed the arrangement of structural components, such as cellulose, collagen, chitin, and keratin, inadvertently created nanoscale landscapes that catch light in the most vibrantly diverse ways—producing iridescent greens, fiery reds, brilliant blues, opalescent whites, glossy silvers, and ebony blacks.

Structural colors, in contrast to those produced by pigments or dyes, arise from the physical interaction of light with biological nanostructures. These color-creating structures likely developed as an important phenotype during the Cambrian explosion more than 500 million years ago, when organisms developed the first eyes and the ability to detect light, color, shade, and contrast. “As soon as you had visual predators, there were organisms that were either trying to distract, avoid, or communicate with those predators using structural coloration,” says Yale University evolutionary ornithologist Richard Prum.

Ever since, structural coloration has evolved multiple times across the tree of life, as a wide range of organisms developed ways to fine-tune the geometry of some of the most abundant (and often colorless) biomaterials on Earth, engineering grooves, pockets, and films that scatter light waves and cause them to interfere with each other in ways we humans happen to find aesthetically pleasing.

Here’s why color derived from structure doesn’t fade, from Luiggi’s article,

Pigments and dyes are molecules that produce colors by the selective absorption and reflection of specific wavelengths of electromagnetic radiation. Structural colors, on the other hand, rely exclusively on the shape of the material and not its chemical properties. While pigments and dyes degrade and their colors fade over time, some types of structural coloration, which rely on the same materials that make up tree bark, insect exoskeletons, and claws or nails, can persist hundreds, thousands, and even millions of years after the death of the organism.

Structural color can be found in a lot of plant life,

Although there are only a handful of known examples of structural colors in fruits, there are plenty to be found in the leaves and petals of plants. Within every family of flowering plants, there is at least one species that displays structural colors.

“The presence of structural colors, especially in flowers, is likely used by pollinators to spot the position of the flower and to recognize it better,” Vignolini [Silvia Vignolini, a physics postdoc at the University of Cambridge] explains. But in some plants, the evolutionary purpose of structural coloration is harder to pin down. The leaves of the low-lying tropical spikemoss Selaginella willdenowii, for example, produce blue-green iridescence when young and growing in the shade, and tend to lose the structural coloration with age and when exposed to high levels of light. The iridescence is achieved by cells in the leaves’ upper epidermis, which contain a few layers of cellulose microfibrils packed with different amounts of water. This ultrastructure is often absent in the leaves of the same species growing in direct sunlight. Researchers hypothesize that the spikemoss turns off its iridescence by changing the water content of the leaves’ cell walls, says Heather Whitney, a research fellow at the University of Bristol who studies iridescence in plants.

This capability is not limited to plants. Insects (jewel beetles and the morpho butterfly are often cited) and fish also have evolved to include structural color as protective or attractive devices, from Luiggi’s article,

The brightest living tissues on the planet are found in fish. Under ideal conditions, for example, the silvery scales of the European sardine and the Atlantic herring can act like near-perfect mirrors—reflecting up to 90 percent of incoming light. It is an irony of nature that these shiniest of structures are not meant to be flaunted, but are intended as camouflage.

“When you’re out in the open water, if you drop down below 10 to 30 meters, in any direction you look, the intensity of light is the same,” explains Nicholas Roberts, a physicist at the University of Bristol who specializes in bio-optics. At that depth, a perfect reflector, or mirror, would seem invisible, because light is equally reflected from all sides and angles.

It will be interesting to see if there’s any future discussion of the giant squid in the context of structural color since, according to very recent research (as per my Feb. 1, 2013 posting), it appears to be covered in gold leaf when observed in its habitat.

Luiggi’s article starts with an ornithologist and circles back in a discussion about the difficulty of creating nanostructures, soft matter condensed physics, and birds,

To create structural colors, organisms must master architecture at the nanoscale—the size of visible-light wavelengths. “But it turns out that biology doesn’t do a good job of creating nanostructures,” Prum says.

Instead, organisms create the initial conditions that allow those nanostructures to grow using self-organizing physical processes. Thus, organisms exploit what’s known as soft condensed matter physics, or “the physics of squishy stuff,” as Prum likes to call it. This relatively new field of physics deals with materials that are right at the boundaries of hard solids, liquids, and gases.

“There’ve been huge advances in this field in the last 30 years which have created rich theories of how structure can arise at the nanoscale,” Prum says. “It has been very applicable to the understanding of how structural colors grow.”

Soft condensed matter physics has been particularly useful in understanding the production of the amorphous nanostructures that imbue the feathers of certain bird species with intensely vibrant hues. The blue color of the male Eastern bluebird (Sialia sialis), for example, is produced by the selective scattering of blue light from a complex nanostructure of b-keratin channels and air pockets in the hairlike branches called feather barbs that give the quill its lift. The size of the air pockets determines the wavelengths that are selectively amplified.

While there’s better understanding of the mechanisms involved in structural color, scientists are a long way from replicating the processes, from the article,

“The three-dimensional nature of the structures themselves is just so complex,” says Vukusic. [physicist Peter Vukusic, a professor of natural photonics at the University of Exeter, UK] “Were it to be a simple periodic system with a regular geometry, you could easily put that into a computer model and run simulations all day. But the problem is that they are never perfectly periodic.”

This article is open access so, as I noted earlier, all you need is the time. As of my Feb. 6, 2013 posting, there was some new research announced about scientists making observations about the structural color in peacock feathers and applying some of those ideas to develop better resolution in e-readers.

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Posted in biomimcry, nanophotonics, nanotechnology | 2 Comments »

3D microchip: “… we can actually see the data climbing this nano-staircase step by step”

Thursday, January 31st, 2013

A Jan. 30, 2013 news release about a 3D microchip developed from a spintronic chip is available on EurekAlert here or at the University of Cambridge here and provides background about why a 3D microchip would be developed,

Scientists from the University of Cambridge have created, for the first time, a new type of microchip which allows information to travel in three dimensions. Currently, microchips can only pass digital information in a very limited way – from either left to right or front to back. …

Dr Reinoud Lavrijsen, an author on the paper from the University of Cambridge, said: “Today’s chips are like bungalows – everything happens on the same floor. We’ve created the stairways allowing information to pass between floors.”

Here are some of the technical details,

For the research, the Cambridge scientists used a special type of microchip called a spintronic chip which exploits the electron’s tiny magnetic moment or ‘spin’ (unlike the majority of today’s chips which use charge-based electronic technology). Spintronic chips are increasingly being used in computers, and it is widely believed that within the next few years they will become the standard memory chip.

To create the microchip, the researchers used an experimental technique called ‘sputtering’. They effectively made a club-sandwich on a silicon chip of cobalt, platinum and ruthenium atoms. The cobalt and platinum atoms store the digital information in a similar way to how a hard disk drive stores data. The ruthenium atoms act as messengers, communicating that information between neighbouring layers of cobalt and platinum. Each of the layers is only a few atoms thick.

They then used a laser technique called MOKE to probe the data content of the different layers. As they switched a magnetic field on and off they saw in the MOKE signal the data climbing layer by layer from the bottom of the chip to the top. They then confirmed the results using a different measurement method.

Here’s the source for the quote used in the headline,

Professor Russell Cowburn, lead researcher of the study from the Cavendish Laboratory, the University of Cambridge’s Department of Physics, said: “Each step on our spintronic staircase is only a few atoms high. I find it amazing that by using nanotechnology not only can we build structures with such precision in the lab but also using advanced laser instruments we can actually see the data climbing this nano-staircase step by step.

An artistic representation of the microchip and the data,

3D microchip, courtesy of the University of Cambridge. Credit LindenArtWork www.lindenartwork.com.

3D microchip, courtesy of the University of Cambridge. Credit LindenArtWork www.lindenartwork.com

Here’s a citation and a link to the paper,

Magnetic ratchet for three-dimensional spintronic memory and logic by Reinoud Lavrijsen, Ji-Hyun Lee, Amalio Fernández-Pacheco,Dorothée C. M. C. Petit, Rhodri Mansell, & Russell P. Cowburn.  Nature, 493, 647–650 (31 January 2013) doi:10.1038/nature11733 (Published online 30 January 2013)

The paper is behind a paywall.

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Posted in electronics, nanotechnology | No Comments »

Another day, another graphene centre in the UK as the Graphene flagship consortium’s countdown begins

Thursday, January 24th, 2013

The University of Cambridge has announced a Cambridge Graphene Centre due to open by the end of 2013 according to a Jan. 24, 2012 news item on Nanowerk,

The Cambridge Graphene Centre will start its activities on February 1st 2013, with a dedicated facility due to open at the end of the year. Its objective is to take graphene to the next level, bridging the gap between academia and industry. It will also be a shared research facility with state-of-the-art equipment, which any scientist researching graphene will have the opportunity to use.

The University of Cambridge Jan. 24, 2013 news release, which originated the news item, describes the plans for graphene research and commercialization,

The first job for those working in the Cambridge Graphene Centre will be to find ways of manufacturing and optimising graphene films, dispersions and inks so that it can be used to good effect.

Professor Andrea Ferrari, who will be the Centre’s Director, said: “We are now in the second phase of graphene research, following the award of the Nobel Prize to Geim and Novoselov. That means we are targeting applications and manufacturing processes, and broadening research to other two-dimensional materials and hybrid systems. The integration of these new materials could bring a new dimension to future technologies, creating faster, thinner, stronger, more flexible broadband devices.”

…

One such project, led by Dr Stephan Hofmann, a Reader and specialist in nanotechnology, will look specifically at the manufacturability of graphene and other, layered, 2D materials. At the moment, sheets of graphene that are just one atom thick are difficult to grow in a controllable manner, manipulate, or connect with other materials.

Dr Hofmann’s research team will focus on a growth method called chemical vapour deposition (CVD), which has already opened up other materials, such as diamond, carbon nanotubes and gallium nitride, to industrial scale production.

“The process technology will open up new horizons for nanomaterials, built layer by layer, which means that it could lead to an amazing range of future devices and applications,” Dr Hofmann said.

The Government funding for the Centre is complemented by strong industrial support, worth an additional £13 million, from over 20 partners, including Nokia, Dyson, Plastic Logic, Philips and BaE systems. A further £11M of European Research Council funding will support activities with the Graphene Institute in Manchester, and Lancaster University. [emphasis mine]

Its work will focus on taking graphene from a state of raw potential to a point where it can revolutionise flexible, wearable and transparent electronics. The Centre will target the manufacture of graphene on an industrial scale, and applications in the areas of flexible electronics, energy, connectivity and optoelectronics.

Professor Yang Hao, of Queen Mary, University of London, will lead Centre activities targeting connectivity, so that graphene can be integrated into networked devices, with the ultimate vision of creating an “internet of things”.

Professor Clare Grey, from Cambridge’s Department of Chemistry, will lead the activities targeting the use of graphene in super-capacitors and batteries for energy storage. The research could, ultimately, provide a more effective energy storage for electric vehicles, storage on the grid, as well as boosting the energy storage possibilities of personal devices such as MP3 players and mobile phones.

The announcement of a National Graphene Institute in Manchester was mentioned in my Jan. 14, 2013 posting and both the University of Manchester and the Lancaster University are part of the Graphene Flagship consortium along with the University of Cambridge and Sweden’s Chalmers University, which is the lead institution, and others competing against three other Flagship projects for one of two 1B Euro prizes.

These two announcements (Cambridge Graphene Centre and National Graphene Institute come at an interesting time, the decision as to which two projects will receive 1B Euros for research is being announced Jan. 28, 2013 in Brussels, Belgium. The Jan. 15, 2013 article by Frank Jordans on the R&D website provides a few more details,

Teams of scientists from across the continent [Europe] are vying for a funding bonanza that could see two of them receive up to €1 billion ($1.33 billion) over 10 years to keep Europe at the cutting edge of technology.

The contest began with 26 proposals that were whittled down to six last year. Just four have made it to the final round.

They include a plan to develop digital guardian angels that would keep people safe from harm; a massive data-crunching machine to simulate social, economic and technological change on our planet; an effort to craft the most accurate computer model of the human brain to date; and a team working to find better ways to produce and employ graphene—an ultra-thin material that could revolutionize manufacturing of everything from airplanes to computer chips.

Jordans’ article goes on to further explain the reasoning for this extraordinary contest. All four groups must be highly focused on Monday’s (Jan. 28, 2013) announcement from EU (European Union) officials, after all, two prizes and four competitors means that the odds of winning are 50/50. Good luck!

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Posted in electronics, nanotechnology, science funding, science policy | 2 Comments »

Policy visualization tool

Monday, December 3rd, 2012

Thanks to David Bruggeman and his Dec. 2, 2012 posting on the Pasco Phronesis blog for this information about a very intriguing project, a policy visualization tool,  (Note: I have removed links),

ProjectPolicy.org is a startup effort established by a team of Cambridge researchers working to make it easier to access policy-relevant data.  …

They are looking for help, and are advertising for Policy Fellows and a Technology Associate. The Policy Fellows would work remotely, gathering and curating data for a particular geographic region.

I found more information about ProjectPolicy in a Nov. 23, 2012 University of Cambridge news release,

The winning project of the SVC2UK Cambridge Startup weekend, which took place at Cambridge Judge Business School between 9 and 11 November 2012, has gone on to win the Grand Finale in London.

ProjectPolicy.org is an online, intuitive tool to help make sense of policy information by aggregating data from different sources. Following a pitch by Nathan Boublil and Agastya Muthanna, the team behind ProjectPolicy was formed during the SVC2UK Cambridge Startup Weekend and together the five team members developed and presented the initiative as a viable business opportunity to a panel of judges.

This project is currently one of 15 semi-finalists in the Global Startup Battle which hosted 138 teams battling for a spot in the semi-finals. The online battle was waged from Nov. 9 – 19, 2012 (over two weekends) with 10,000+ participants in 100+ cities around the world. Here’s some information about the panelists currently judging the semi-finalists’ project in a Nov. (?), 2012 posting on the SW blog (Note: I have removed links),

TONY HSIEH 

In 1999, at the age of 24, Tony Hsieh sold LinkExchange, the company he co-founded, to Microsoft for   $265 million.

He then joined Zappos as an advisor and investor, and eventually became CEO, where he helped the company grow from almost no sales to over $1 billion in gross merchandise sales annually, while simultaneously making Fortune magazines annual Best Companies to Work For list. In November 2009, Zappos.com, Inc. was acquired by Amazon.com in a deal valued at $1.2 billion on the day of closing.

BRAD FELD

Brad is one of the managing directors at Foundry Group, a venture capital firm that invests in early stage software / Internet companies throughout the United States. He is also the co-founder of TechStars, a mentor-driven accelerator, author of several books and blogs, and a marathon runner.

Brad has been an early stage investor and entrepreneur since 1987. Prior to co-founding Foundry Group, he co-founded Mobius Venture Capital and, prior to that, founded Intensity Ventures, a company that helped launch and operate software companies. Brad is also a co-founder of TechStarts.

…

LEAH BUSQUE

A true visionary, Leah Busque (@labusque) is the founder and chief executive officer of TaskRabbit.com, an online marketplace where you can outsource small jobs and Tasks to others in your own community. TaskRabbit is the pioneer in “service networking” – a concept Leah conceived and has since evangelized. Now an industry-wide concept, service networking describes the productive power of a web-based, social-networked community.

Since its founding in 2008, Leah has grown TaskRabbit to more than 40 employees and has expanded the service to Boston, Chicago, Los Angeles, New York City, Portland, San Francisco, and Seattle with several more markets to come in 2012. Under her leadership, TaskRabbit was named one of the “Next Big Things in Tech” by WSJ Digits, Start up to Watch in 2012” by Inc. Magazine, and a finalist for “Mobile app of the year” in 2011 by both the Crunchies and Mashable Awards.

CHRIS HOLLOD

Chris Hollod lives in LA and works directly with Ashton Kutcher, Guy Oseary, and Ron Burkle to help manage their venture capital fund, A-Grade Investments.

Chris’s responsibilities include evaluating new opportunities, managing deal flow, spearheading the investment process, executing deals, and coordinating with portfolio companies.

Chris also works as an Associate for The Yucaipa Companies, a private equity firm founded by Ron Burkle.  Prior to joining A-Grade Investments and The Yucaipa Companies, Chris worked in Investment Banking.  Chris graduated summa cum laude and Phi Beta Kappa from Vanderbilt University with a degree in Economics and minors in Finance and Philosophy.

JESSE DRAPER

Jesse Draper is creator and host of “The Valley Girl Show” through which she’s become a spokesperson for startups and helped pioneer the way of new media content distribution.

Formerly a Nickelodeon star, Draper is now CEO of Valley Girl™ where she runs pre-production through post-production and distribution for the show, runs technology blog Lalawag.com and is a regular featured writer for Mashable, San Francisco Chronicle, Huffington Post and Glam. Draper is also a speaker at business conferences around the world including DLD, SXSW and universities such as Stanford.

Getting back to ProjectPolicy.org, there’s more information in a brief video they’ve produced,

If you are interested in helping this team make its policy visualization tool useful and accessible, here’s more about the positions they are advertising,

As a Technology Associate, you will help the technology team develop the platform.

You will be responsible for helping to develop crucial modules of the product. This

will be a valuable learning opportunity for you to work in product development at a

fast-growing startup. The fellowship can be part-time or full-time, carried out

virtually and alongside studies (Compsci/Engineering undergrad/postgrad or

other activities).

Duration: 3 to 6 months, depending on preference. Expenses reimbursed.

Joining date: ASAP

Requirements:

- Excellent Programming skills

- Knowledge of Web based Software development methodologies

- PHP

- MySQL

- Server side Java including Web Service development

- JavaScript

- Google Maps API

- Google Fusion Tables

- Software Testing

- Ability to learn new technologies

- Willingness to work independently

- Organised.

To apply, please email your CV and a short paragraph explaining your motivations

and why you want to join us to: contact@projectpolicy.org

As a Policy Fellow, you will work remotely to assist the team in developing the first
online platform focused on public policy. Responsible for a geographic area you
will assist in data selection and curation at the local level.
As an Economics/Politics/Public Policy/International relations student or recent
graduate, you must be familiar with researching quantitative and qualitative
information quickly and accurately.
We are currently looking for Policy Fellows to cover the following territories:
- North America;
- Asia (with fluency in relevant languages);
- Continental Europe (with fluency in relevant languages);
- Spain and South America ex Brazil (fluency in Spanish required);
- Portugal and Brazil (Fluency in Portuguese required);
- Sub-saharan Africa (with fluency in relevant languages).
Policy Fellows are expected to work independently and virtually.
Duration: 6 months min.
Joining date: ASAP.
Time commitment: 4-6 hours per week.
To apply, please email your CV and a short paragraph explaining your motivations,
area of interest and why you want to join us to: contact@projectpolicy.org

I wish ProjectPolicy.org good luck in the competition and I hope to be seeing their tools online in the near future.

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Posted in visual data | No Comments »

Existential risk

Monday, November 26th, 2012

The idea that robots of one kind or another (e.g. nanobots eating up the world and leaving grey goo, Cylons in both versions of Battlestar Galactica trying to exterminate humans, etc.) will take over the world and find humans unnecessary  isn’t especially new in works of fiction. It’s not always mentioned directly but the underlying anxiety often has to do with intelligence and concerns over an ‘explosion of intelligence’. The question it raises,’ what if our machines/creations become more intelligent than humans?’ has been described as existential risk. According to a Nov. 25, 2012 article by Sylvia Hui for Huffington Post, a group of eminent philosophers and scientists at the University of Cambridge are proposing to found a Centre for the Study of Existential Risk,

Could computers become cleverer than humans and take over the world? Or is that just the stuff of science fiction?

Philosophers and scientists at Britain’s Cambridge University think the question deserves serious study. A proposed Center for the Study of Existential Risk will bring together experts to consider the ways in which super intelligent technology, including artificial intelligence, could “threaten our own existence,” the institution said Sunday.

“In the case of artificial intelligence, it seems a reasonable prediction that some time in this or the next century intelligence will escape from the constraints of biology,” Cambridge philosophy professor Huw Price said.

When that happens, “we’re no longer the smartest things around,” he said, and will risk being at the mercy of “machines that are not malicious, but machines whose interests don’t include us.”

Price along with Martin Rees, Emeritus Professor of Cosmology and Astrophysics, and Jaan Tallinn, Co-Founder of Skype, are the driving forces behind this proposed new centre at Cambridge University. From the Cambridge Project for Existential Risk webpage,

Many scientists are concerned that developments in human technology may soon pose new, extinction-level risks to our species as a whole. Such dangers have been suggested from progress in AI, from developments in biotechnology and artificial life, from nanotechnology, and from possible extreme effects of anthropogenic climate change. The seriousness of these risks is difficult to assess, but that in itself seems a cause for concern, given how much is at stake. …

The Cambridge Project for Existential Risk — a joint initiative between a philosopher, a scientist, and a software entrepreneur — begins with the conviction that these issues require a great deal more scientific investigation than they presently receive. Our aim is to establish within the University of Cambridge a multidisciplinary research centre dedicated to the study and mitigation of risks of this kind.

Price and Tallinn co-wrote an Aug. 6, 2012 article for the Australia-based, The Conversation website, about their concerns,

We know how to deal with suspicious packages – as carefully as possible! These days, we let robots take the risk. But what if the robots are the risk? Some commentators argue we should be treating AI (artificial intelligence) as a suspicious package, because it might eventually blow up in our faces. Should we be worried?

…

Asked whether there will ever be computers as smart as people, the US mathematician and sci-fi author Vernor Vinge replied: “Yes, but only briefly”.

He meant that once computers get to this level, there’s nothing to prevent them getting a lot further very rapidly. Vinge christened this sudden explosion of intelligence the “technological singularity”, and thought that it was unlikely to be good news, from a human point of view.

Was Vinge right, and if so what should we do about it? Unlike typical suspicious parcels, after all, what the future of AI holds is up to us, at least to some extent. Are there things we can do now to make sure it’s not a bomb (or a good bomb rather than a bad bomb, perhaps)?

It appears Price, Rees, and Tallinn are not the only concerned parties, from the Nov. 25, 2012 research news piece on the Cambridge University website,

With luminaries in science, policy, law, risk and computing from across the University and beyond signing up to become advisors, the project is, even in its earliest days, gathering momentum. “The basic philosophy is that we should be taking seriously the fact that we are getting to the point where our technologies have the potential to threaten our own existence – in a way that they simply haven’t up to now, in human history,” says Price. “We should be investing a little of our intellectual resources in shifting some probability from bad outcomes to good ones.”

Price acknowledges that some of these ideas can seem far-fetched, the stuff of science fiction, but insists that that’s part of the point.

According to the Huffington Post article by Lui, they expect to launch the centre next year (2013). In the meantime, for anyone who’s looking for more information about the ‘intelligence explosion’ or  ‘singularity’ as it’s also known, there’s a Wikipedia essay on the topic.  Also, you may want to stay tuned to this channel (blog) as I expect to have some news about an artificial intelligence project based at the University of Waterloo (Ontario, Canada) and headed by Chris Eliasmith at the university’s Centre for Theoretical Neuroscience, later this week.

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Posted in robots, science, science philosophy | 1 Comment »

Mechanics of quantum kissing

Friday, November 9th, 2012

“It is as if you can kiss without quite touching lips,” says Professor Jeremy Baumberg from the University of Cambridge Cavendish Laboratory in the University of Cambridge’s Nov. 7, 2012 news release about quantum electron jumps,

Even empty gaps have a colour. Now scientists have shown that quantum jumps of electrons can change the colour of gaps between nano-sized balls of gold. The new results, published today in the journal Nature, set a fundamental quantum limit on how tightly light can be trapped.

The team from the Universities of Cambridge, the Basque Country and Paris have combined tour de force experiments with advanced theories to show how light interacts with matter at nanometre sizes. The work shows how they can literally see quantum mechanics in action in air at room temperature.

As for the kissing, it all starts with metal and jumping electrons,

Because electrons in a metal move easily, shining light onto a tiny crack pushes electric charges onto and off each crack face in turn, at optical frequencies. The oscillating charge across the gap produces a ‘plasmonic’ colour for the ghostly region in-between, but only when the gap is small enough.

Team leader Professor Jeremy Baumberg from the University of Cambridge Cavendish Laboratory suggests we think of this like the tension building between a flirtatious couple staring into each other’s eyes. As their faces get closer the tension mounts, and only a kiss discharges this energy.

H/T to the Nov. 7, 2012 news item on ScienceDaily where I first learned of quantum kissing,

In the new experiments, the gap is shrunk below 1nm (1 billionth of a metre) which strongly reddens the gap colour as the charge builds up. However because electrons can jump across the gap by quantum tunnelling, the charge can drain away when the gap is below 0.35nm, seen as a blue-shifting of the colour. …

…

Prof Javier Aizpurua, leader of the theoretical team from San Sebastian complains: “Trying to model so many electrons oscillating inside the gold just cannot be done with existing theories.” He has had to fuse classical and quantum views of the world to even predict the colour shifts seen in experiment.

The new insights from this work suggest ways to measure the world down to the scale of single atoms and molecules, and strategies to make useful tiny devices.

Something to think about the next time you kiss.

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Less confused about Europe’s FET (Future and Emerging Technologies programme)

Monday, February 13th, 2012

I’ve had problems trying figure out the European Union’s Future and Emerging Technologies programme and so I’m glad to say that the Feb. 10, 2012 news item on Nanowerk offers to clear up a few matters for me (and presumably a few other people too).

From the news item,

Go forth and explore the frontiers of science and technology! This is the unspoken motto of the Future and Emerging Technologies programme (FET), which has for more than 20 years been funding and inspiring researchers across Europe to lay new foundations for information and communication technology (ICT). [emphasis mine]

The vanguard researchers of frontier ICT research don’t always come from IT backgrounds or follow the traditional academic career path. The European Commission’s FET programme encourages unconventional match-ups like chemistry and IT, physics and optics, biology and data engineering. Researchers funded by FET are driven by ideas and a sense of purpose which push the boundaries of science and technology.

They have three funding programmes (from the news item),

To address these challenges, the FET scheme supports long-term ICT programmes under three banners:

  • FET-Open, which has simple and fast mechanisms in place to receive new ideas for projects without pre-conceived boundaries or deadlines;
  • FET-Proactive, which spearheads ‘transformative’ research and supports community-building around a number of fundamental long-term ICT challenges; and
  • FET Flagships, which cut across national and European programmes to unite top research teams pursuing ambitious, large-scale, science-driven research with a visionary goal.

The news item goes on to describe a number of projects including the GRAPHENE-CA flagship pilot currently under consideration, along with five other flagship projects, for one of two 1 Billion Euro prizes. I have commented before (my Feb. 6, 2012 posting) on the communication strategies being employed by at least some of the members of this particular flagship project. Amazingly, they’ve done it again; theirs is the only flagship pilot project mentioned.

You can see the original article on the European Union website here where they have described other projects including this one, PRESENCCIA,

‘Light switches, TV remote controls and even house keys could become a thing of the past thanks to brain-computer interface (BCI) technology being developed in Europe that lets users perform everyday tasks with thoughts alone.’ So begins a story on ICT Results about a pioneering EU-funded FET project called Presenccia*.

Primary applications of BCI are in gaming/virtual reality (VR), home entertainment and domestic care, but the project partners also see their work helping the medical profession. ‘A virtual environment could be used to train a disabled person to control an electric wheelchair through a BCI,’ explained Mel Slater, the project coordinator. ‘It is much safer for them to learn in VR than in the real world, where mistakes could have physical consequences.’

So, PRESENCCIA is a project whereby people will be trained to use a BCI in virtual reality before attempting it in real life. I wish there was a bit more information about this BCI technology that is being developed in Europe as I am deeply fascinated and horrified by this notion of thought waves that ‘turn light switches on and off’ or possibly allow you to make a phone call as Professor Mark Welland at Cambridge University was speculating in 2010 (mentioned in my April 30, 2010 posting [scroll 1/2 way down]). Welland did mention that you would need some sort of brain implant to achieve a phone call with your thought waves, which is the aspect that makes me most uncomfortable.

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UK rolls dice on glamourous graphene

Thursday, February 2nd, 2012

These days, graphene is the glamourpuss (a US slang term from the 1940s for which I have great affection) of the nanoscience/nanotechnology research world and is an international ‘object of desire’. For example, the UK government just announced a GBP 50 M investment in graphene research. From the Feb. 2, 2012 news item on Nanowerk,

Minister for Universities and Science, David Willetts, said: “This significant investment in graphene will drive growth and innovation, create high-tech jobs and keep the UK at the very forefront of this rapidly evolving area of science. With a Nobel Prize and hundreds of published papers under their belts, scientists in the UK have already demonstrated that we have real strengths in this area. The graphene hub will build on this by taking this research through to commercial success.”

A key element of the graphene hub will be a national institute of graphene research and commercialisation activities. The University of Manchester has been confirmed as the single supplier invited to submit a proposal for funding a new £45 million national institute, £38 million of which will be provided by the UK Government. This world-class shared facility for graphene research and commercialisation activities will be accessible by both researchers and business.

I’d never really heard about graphene until 2010 when Andre Geim and Konstantin Novoselov at the University of Manchester won the Nobel Prize in Physics for their work in graphene. (In 2012, both scientists were knighted and I could have referred to them as Sir Geim and Sir Novoselov.) Since that time money has been flowing towards graphene research. As far as I can tell this GBP 50 M is the tip of the iceberg.

The University of Manchester and other institutions in the UK are part of an international consortium competing for a 1 billion Euro research prize through the European Union’s Future and Emerging Technologies (FET) programme. (I have a bit more about the FET competition in my June 13, 2011 posting.)

There does seem to be some jockeying for position. First, the graphene consortium is currently competing for the FET money as the Graphene Flagship. Only two of six competing flagships will receive money for further research. Should the consortium’s flagship be successful, there will be six member countries competing for a share of that 1 billion Euro prize. The UK is represented by three research institutions (University of Manchester, Lancaster University, and the University of Cambridge) while every other country in the graphene consortium is represented by one research institution.

The decision as to which two FET flagship projects receive the funding will be made public in late 2012. Meanwhile, the UK not only announces this latest funding but last fall also launched a big graphene exhibition, anchored by the three UK universities in the consortium,  in Warsaw. I wrote about that development in my Nov. 25, 2011 posting and questioned the communication strategy. It’s taken me a while but I’m beginning to realize that this was likely part of a larger political machination designed to ensure UK dominance in graphene research and, I imagine they dearly hope this will be true, commercialization.

ETA Feb. 6, 2012: Dexter Johnson at the Nanoclast blog (on the Institute of Electrical and Electronics Engineers [IEEE] website) noted this about the UK and commercializing graphene in the electronics industry in his Feb. 3, 2012 posting,

The press release emphasizes how “The graphene hub will build on this [investment] by taking this research through to commercial success.” So I was wondering if there would be any discussion of how they intended to build up an electronics industry that it never really had in the first place to exploit the material.

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