Tag Archives: Dan Nosowitz

Nanotechnology-enabled robot skin

We take it for granted most of the time. The ability to sense pressure and respond to appropriately doesn’t seem like any great gift but without it, you’d crush fragile objects or be unable to hold onto the heavy ones.

It’s this ability to sense pressure that’s a stumbling block for robotmakers who want to move robots into jobs that require some dexterity, e.g., one that could clean yours windows and your walls without damaging one or failing to clean the other.

Two research teams have recently published papers about their work on solving the ‘pressure problem’. From the article by Jason Palmer for BBC News,

The materials, which can sense pressure as sensitively and quickly as human skin, have been outlined by two groups reporting in [the journal] Nature Materials.

The skins are arrays of small pressure sensors that convert tiny changes in pressure into electrical signals.

The arrays are built into or under flexible rubber sheets that could be stretched into a variety of shapes.

The materials could be used to sheath artificial limbs or to create robots that can pick up and hold fragile objects. They could also be used to improve tools for minimally-invasive surgery.

One team is located at the University of California, Berkeley and the other at Stanford University. The Berkeley team headed by Ali Javey, associate professor of electrical engineering and computer sciences has named their artificial skin ‘e-skin’. From the article by Dan Nosowitz on the Fast Company website,

Researchers at the University of California at Berkeley, backed by DARPA funding, have come up with a thin prototype material that’s getting science nerds all in a tizzy about the future of robotics.

This material is made from germanium and silicon nanowires grown on a cylinder, then rolled around a sticky polyimide substrate. What does that get you? As CNet says, “The result was a shiny, thin, and flexible electronic material organized into a matrix of transistors, each of which with hundreds of semiconductor nanowires.”

But what takes the material to the next level is the thin layer of pressure-sensitive rubber added to the prototype’s surface, capable of measuring pressures between zero and 15 kilopascals–about the normal range of pressure for a low-intensity human activity, like, say, writing a blog post. Basically, this rubber layer turns the nanowire material into a sort of artificial skin, which is being played up as a miracle material.

As Nosowitz points out, this is a remarkable achievement and it is a first step since skin registers pressure, pain, temperature, wetness, and more. Here’s an illustration of Berkeley’s e-skin (Source: University of California Berkeley, accessed from  http://berkeley.edu/news/media/releases/2010/09/12_eskin.shtml Sept. 14, 2010),

An artist’s illustration of an artificial e-skin with nanowire active matrix circuitry covering a hand. The fragile egg illustrates the functionality of the e-skin device for prosthetic and robotic applications.

The Stanford team’s approach has some similarities to the Berkeley’s (from Jason Palmer’s BBC article),

“Javey’s work is a nice demonstration of their capability in making a large array of nanowire TFTs [this film transistor],” said Zhenan Bao of Stanford University, whose group demonstrated the second approach.

The heart of Professor Bao’s devices is micro-structured rubber sheet in the middle of the TFT – effectively re-creating the functionality of the Berkeley group’s skins with less layers.

“Instead of laminating a pressure-sensitive resistor array on top of a nanowire TFT array, we made our transistors to be pressure sensitive,” Professor Bao explained to BBC News.

Here’s a short video about the Stanford team’s work (Source: Stanford University, accessed from http://news.stanford.edu/news/2010/september/sensitive-artificial-skin-091210.html Sept. 14, 2010),

Both approaches to the ‘pressure problem’ have at least one shortcoming. The Berkeley’s team’s e-skin has less sensitivity than Stanford’s while the Stanford team’s artificial skin is less flexible than e-skin as per Palmer’s BBC article. Also, I noticed that the Berkeley team at least is being funded by DARPA ([US Dept. of Defense] Defense Advanced Research Projects Agency) so I’m assuming a fair degree of military interest, which always gives me pause. Nonetheless, bravo to both teams.

E-readers: musings on publishing and the word (part 1 of 3)

There’ve been a lot of online articles about e-readers in the last few weeks in particular as debate rages as to whether or not this technology will be viable. It got me to thinking about e-literature, e-readers, e-books, e-paper, e-ink, e-publishing, literacy and on and on. I’ve divided my musings (or attempts to distinguish some sort of pattern within all these contradictory developments) into three parts.This first part is more concerned with the technology/business end of things.

Samsung just announced that it was moving out of the e-reader business. From an article (Aug. 25 2010) by Kit Eaton in Fast Company,

Need any evidence that the dedicated e-reader is destined to become a mere niche-appeal device? Here you go: Tech giant Samsung is ditching its clever e-paper business after years of clever successes and a ton of research into what may be the future for the technology.

Back in 2009 at CES Samsung teased its good-looking Kindle-challenging e-reader, the Papyrus, which used Samsung’s own proprietary electronic ink system for the display. At CES this year it followed up with its “E6” device, with a rumored cost of $400. Samsung had been shaking the e-paper world since late in 2008 with numerous e-paper announcements, including revealing a color 14-inch flexible e-paper display as long ago as October 2008, which used carbon nanotube tech to achieve its sharp image quality.

Now it seems that revolutions in the e-reader market (namely that odd race-to-the-bottom in pricing over quality of service) combined with revolutions in the tablet PC market (which means the iPad, which can do a million more things than the Papyrus or E6 could) and pricing that neatly undercuts Samsung’s planned price points has resulted in Samsung killing its e-paper research and development.

According to Eaton, Samsung hasn’t entirely withdrawn from the e-reader business; the company will be concentrating on its LCD-based systems instead. Samsung is also releasing its own tablet, Galaxy Tab as competition to Apple’s iPad,  in mid-September 2010 (Sept. 2, 2010 news item at Financial Post website).

Dan Nosowitz also writing for Fast Company presents an opinion (Aug. 12, 2010 posting) which sheds light on why Samsung is focusing on LCD -based readers over e-ink-based readers such as Kindle and Nook,

E-ink is one of the more unusual technologies to spring up in recent years. It’s both more expensive and less versatile than LCD, a long-established product seen in everything from iPods to TVs. It’s incredibly specific, but also incredibly good at its one job: reading text.

E-ink e-book readers like the Amazon Kindle and Barnes & Noble Nook offer, in the opinion of myself and many others, the best digital book-reading experience available. …

E-ink will die mostly because it fundamentally can’t compete with tablets. That’s why announcements like today’s, in which E-Ink (it’s a company as well as that company’s main–or only?–product) claimed it will release both a color and a touchscreen version by early 2011, is so confusing. But color and interface are hardly the only obstacles e-ink has to overcome to compete with tablets: Its refresh rates make video largely impossible, it can’t cram in enough pixels to make still photos look any more crisp than a day-old McDonald’s french fry, and, most damnably, it’s still extremely expensive.

Amazon showed that the way to make e-book readers sell like blazes is to lower the price to near-impulse-item territory. Its new $140 Kindle sold out of pre-orders almost immediately, and there’s been more buzz around the next version than can be explained through hardware upgrades alone. It’s a great reader, don’t get me wrong, but its incredible sales numbers are due in large part to the price cut.

That comment about the price cut for the e-reader as being key to its current success can certainly be borne out by this article E-reader faceoff: Kindle or Nook? Here’s a comparison by Mark W. Smith on physorg.com

There’s a titanic battle brewing in the e-reader market. The Amazon Kindle and Barnes & Noble Nook are leaving competitors in the dust this summer and are locked in a war that has dropped prices by more than half in just a year.

and with this article E-readers gain steam with lower prices and new models by Christine Matthias on Salon.com,

The Wall Street Journal and Tech News Daily have a few things you should consider before wading into the increasingly crowded e-book market, as well as new research that reveals folks with an e-reader tend to read a whole lot more than ever before. The Barnes and Noble Nook is trying to wrestle some market share away from the big boys, and Sharper Image just announced a new e-reader called the Literati that hopes to, maybe, nail down more male readers? It’s got a color screen, in any event.

Or you could get a library card. It’s free.

Addy Dugdale at the Fast Company site in her article, Borders Cuts E-Reader Prices as Kindle Goes to Staples, has this to say,

Borders has slashed the prices of E-Readers Kobo and Aluratek by $20, illustrating just how meh they’ve become in the tech world. The price drop is nothing new–both the Kindle and Nook, Amazon and Barnes & Noble’s market leaders, have seen their prices slashed recently, and they’re thought to be the most exciting brands in the sector. But who does the news bode worst for?

But most of all, this news proves that, as my colleague Kit Eaton pointed out a few months back, this is about as good as it gets for the e-Reader. It’s not quite dead, but it’s looking a bit peaky, like. The reason is, of course, the tablet.

There are efforts that may revive e-readers/e-books/e-paper such as this, a new development in the e-paper/e-reader market was announced in a news item on Azonano (Aug.27, 2010),

The FlexTech Alliance, focused on developing the electronic display and the flexible, printed electronics industry supply chain, today announced a contract award to Nyx Illuminated Clothing Company to develop a foldable display constructed from a panel of multiple e-paper screens.

Applications for this type of product are numerous. For consumer electronics, a foldable display can increase the size of e-reader screens without increasing the device foot-print. In military applications, maps may be read and stored more easily in the field. Medical devices can be enhanced with more accessible and convenient patient charts.

“To enable this unique technology to work, our engineers will develop circuitry to simultaneously drive six separate e-paper screens as one single display,” described John Bell, project manager for Nyx. “The screen panels will be able to be folded up into the area of a single panel or unfolded to the full six panel area on demand.”

Convenience is always important and a flexible screen that I could fold up and fits easily into a purse or a pocket offers  a big advantage over an e-book or an iPad (or other tablet device). I’d be especially interested if there’s a sizing option, e.g., being able to view in 1-screen, 2-screen, 3-screen and up to 6-screen options.

As for the debate about tablets vs e-readers such as Kindle, Nook, and their brethren, I really don’t know. E-readers apparently offer superior reading experiences but that presupposes interest in reading will be maintained. Something like Mongoliad (as described in my Sept. 7, 2010 posting), for example, would seem ideally suited to a tablet environment where the reader becomes a listener and/or a participant in the story environment.

Tomorrow: Part 2 where I look at the reading and writing experience in this digital world.

Tokyo’s nano tech 2010; McGill Nanotech discovery could make chemistry greener; Vancouver Olympics and technology; Off the deep end: an interview with Cheryl Geisler (part 1 of 3)

I’m looking forward to posting (as promised) my piece about the new dean at Simon Fraser University’s Faculty of Communication, Art and Technology. Dr. Cheryl Geisler. First though, I’ll be noting some of the nanotechnology news.

Mentioned here earlier this month in a piece featuring varnish that ‘sings’, Tokyo’s nano tech 2010 International Nanotechnology Exhibition and Conference opens today, Feb. 17 and runs until Feb. 19. I believe this show and conference is one of the oldest and biggest of its type. For those who don’t know, Japan has long been a leader in nanotechnology. In fact, the term was coined by Norio Taniguchi in 1974 in his paper for the Japan Society for Precision Engineering. (Btw, if you’re interested in ‘singing’ varnish, you can read about it here in my posting of Feb. 3, 2010. It is towards the end of the post.)

On a completely other note, there’s a  news item on physorg.com highlighting a new nanotechnology-enabled process, discovered by researchers at McGill University in Montréal, for using catalysts in chemical reactions so they are ‘greener’. From the news item,

A new nanotech catalyst developed by McGill University Chemists Chao-Jun Li, Audrey Moores and their colleagues offers industry an opportunity to reduce the use of expensive and toxic heavy metals. Catalysts are substances used to facilitate and drive chemical reactions. Although chemists have long been aware of the ecological and economic impact of traditional chemical catalysts and do attempt to reuse their materials, it is generally difficult to separate the catalyzing chemicals from the finished product. The team’s discovery does away with this chemical process altogether.

Li neatly describes the new catalyst as “use a magnet and pull them out!” The technology is known as nanomagnetics and involves nanoparticles of a simple iron magnet

Congratulations to the researchers at McGill.

While it’s not nanotech specific it builds on yesterday’s (Feb.16.10) piece about science at the Vancouver Olympics and provides a tidy segue to the Geisler interview.  I’ve found an article about technology and the Vancouver Olympics on Fast Company by Dan Nosowitz. From the article,

The Vancouver Olympics is especially exciting because it combines all of our favorite things: Twitter, Facebook, Google Street View, recycled computer guts, iPhone apps, and mind-controlled light shows. Oh, right, and sports, I guess.

The Medals

Vancouver’s gold, silver, and bronze medals are all constructed partly of metal collected from discarded circuit boards. Teck Resources, a Canadian mining company, supplied the Royal Canadian Mint with recycled gold, silver, and copper (there’s not much bronze in computer parts, apparently) from which these particularly beautiful medals are made. Each medal is laser-etched with a unique design, and the medals are all wavy, meant to simulate the topographic diversity of Vancouver.

I agree, the medals are gorgeous and, in their way, an extraordinary expression of science, technology, and art.  (You can see images of the medals if you click through to the Fast Company article.)

I could wax on longer about how art, science, technology and more are interconnected but I’d rather post the piece I’ve written after interviewing Cheryl Geisler earlier this month. One note before proceeding, I have preserved the flavour of Geisler’s speech as much as possible. This was a stylistic choice as I prefer to ‘hear’ the interview and a standard Q & A style would not have worked well given the volume of contextual information that I wanted to include.

Off the deep end: interview with Cheryl Geisler (part 1 of 3)

The new Dean (since August 2009 when she arrived from Rensselaer Polytechnic Institute in New York State), Dr. Cheryl Geisler, of the new Faculty (since April 2009) of Communication, Art and Technology (FCAT) at Simon Fraser University (SFU) administers three schools

  • Communication,
  • Contemporary Arts and
  • Interactive Arts and Technology

and two components

  • Master of Publishing and
  • under a not yet finalised special arrangement, Masters [sic] of Digital Media

that occupy (or will in Sept.2011 when the School for the Contemporary Arts moves to its new location at Woodward’s in Vancouver’s downtown eastside) five different physical locations in three different Metro Vancouver (Canada) municipalities. (Geisler has managed, as she pledged, to spend time (i.e., roughly a day) at each location if not weekly certainly on a regular basis. This is an impressive achievement when you consider that the Burnaby campus is 20 k from Surrey and 10 k from Vancouver (you can check those distances on this chart). It becomes more impressive when you realize how awkward the routing is if you’re traveling by car or public transit.)

Describing FCAT is a challenge since it hasn’t achieved a stable form (assuming that stability will be possible given the subject areas the faculty represents). Now, imagine trying to get a grasp of the situation when you’ve moved from the east coast of one country to the west coast of a new country, albeit on the same continent. Then add a move from a privately funded postsecondary institution which is an older one, Rensselaer was founded in 1828, to a publicly funded, comparatively new university, SFU was founded in 1965. All of this on top of dealing with a fluid faculty that has a local but wide-flung geography.

“You know, whenever I see something different I always say that I don’t know if this is SFU or the Canadian university system or if it’s Vancouver. I have no way to sort it out,” says Geisler in response to a question about whether or not she’d encountered any surprises after starting her new job. “Some of the reasons that I chose to come here were because of the greater social engagement with the community [that SFU is known for] and a greater emphasis on collegial decision-making processes. In the private university that I came from, we got things done quickly but not always with a lot of input. Now, I’m coming to a system where things don’t get done particularly quickly but there’s always a lot of consultation, so my challenge is to try and marry those two.”

Geisler brings a little more to the job than her past experience as Head of the Department of Language, Literature and Communication at Rensselaer (you can get more details about Geisler’s CV in yesterday’s posting). She was the leader for a project (RAMP Up! Reforming Advancement Processes through University Professions) funded by the US National Science Foundation (NSF). While much of the focus was specifically on women, the overarching project goals can be applied to other situations. From the project website,

Rensselaer Polytechnic Institute’s NSF-funded project for institutional transformation stands for Reforming Advancement Processes through University Professions.  One of the major goals of the RAMP-Up project is institutional reform using mechanisms of professional self-regulation as a means for controlling advancement through faculty ranks.

Unlike reforms aimed at top-down policy initiatives, this type of self-regulatory reform cannot be mandated, but is achieved only by rethinking faculty-to-faculty processes such as networking, mentoring, and peer review. The kind of change necessary for effective institutional reform will come about as a transformation of culture at all levels of the institute, particularly within departments, which are the hubs of faculty work.

Geisler does anticipate bringing some RAMP Up! (so to speak) to SFU. “Yes, [the project] focused on bottom-up cultural transformations of big university/academic processes and I have a big commitment to bottom-up processes which I brought to that project [and had reinforced as I worked on it]. A big emphasis for me now is to create connections between the various components of FCAT and not consider them as separate entities but to try mixing [them] up and see what the synergies could be.”

Similar to a successful RAMP Up! initiative which went through three rounds of funding, Geisler has proposals on her desk to introduce a type of career campaign award to faculty members for working with a mentor and developing a plan for career advancement. “We’ve had a lot of interest from the junior faculty and I believe it’s really one of the first mentoring initiatives at SFU,” says Geisler.

Tomorrow: budget cuts and history.

Off the deep end: an interview with Cheryl Geisler Introduction, Part 2, Part 3