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« June 2007 | Main | August 2007 »

Making Of "Cellular Visions"

A few months ago we pointed to an amazing animation of cellular molecular machines.

Today, hat tip to Joe Summerhays for a pointer to a TED Talk by David Bolinsky, who made the animation. David discusses the tradeoff between accuracy and clutter, along with the high-level goals of the project, and provides running comments on the video.

Joe comments, "Until we can give the masses a visual of what is happening on the nano level, ability to influence non-scientists on behalf of policy will be gaunt." The Nanofactory Animation is a step in that direction, as are the Nanomedicine Art Gallery and the Nanorex NanoEngineer-1 Gallery; many more steps will be needed.

Chris Phoenix

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On the Future of Warfare

Today I gave an hour-long presentation on “Nanotechnology and the Future of Warfare” at the World Future Society's annual conference. About 60 people attended and peppered me with many excellent questions both during and after my talk. Overall, the audience was quite enthusiastic and responsive.

I opened by quoting from Harvard University professor Steven Pinker, who recently wrote:

Violence has been in decline over long stretches of history, and today we are probably living in the most peaceful moment of our species' time on earth…

In the decade of Darfur and Iraq, and shortly after the century of Stalin, Hitler, and Mao, the claim that violence has been diminishing may seem somewhere between hallucinatory and obscene. Yet recent studies that seek to quantify the historical ebb and flow of violence point to exactly that conclusion.

The big question, of course, is whether this evident decline in violence can be expected to continue. I then discussed what I consider to be an approaching period of perilous geopolitical instability, when…

  • Weapons of mass destruction will be more varied, more deadly, more available, cheaper to obtain, and easier to hide.
  • The strength (and the ambitions) of regional powers will increase rapidly while the stabilizing might of the U.S. could be in decline.
  • New technologies such as genetic engineering, robotics, nanotechnology, and possibly artificial intelligence could enable radical shifts in the balance of power.
  • Global climatic conditions – including increased frequency and severity of killer storms, droughts, infrastructure damage, crop failures, and even whole ecosystem collapses – will contribute to growing tensions.

Maelstrom_2

After reviewing the basics of nanotechnology and desktop manufacturing, I turned to the topic of WMDs and the future of warfare. I asked the audience to consider these three important points:

  1. In modern warfare, the target of attack is not the opposing military – it is the will and capacity of states to make war.
  2. The real target of WMDs is not the victims, but the survivors.
  3. WMD = Not just weapons of destruction, but also of disruption.

We then spent some time talking about the four main elements that comprise weapons systems. These are: a) payloads; b) methods of targeting; c) modes of delivery; and d) means of production. In each area we are seeing rapid change, bringing radically enhanced, more dangerous, and potentially more disruptive military applications.

The most significant of these elements may be the last, the means of production. When applied to weapons of mass destruction/disruption, it could be a titanic lever for dramatically shifting balances of power.

Weapons_3

Finally, I asked people to think about the future of warfare in four dimensions:

  1. Technologies - Which will be the most powerful and possibly destabilizing future military technologies?
  2. Timing - How soon could change arise, and what might take us by surprise?
  3. Context - What other societal shifts, outside of technology, must be taken into account to envision a near future geopolitical environment?
  4. Policies - Which combination of national, international, corporate, and civil society policy planning will lead to the safest world of tomorrow?

It’s difficult in just one hour to convey all the complexities of such a big topic, and it’s even tougher in a 500-word blog article. Obviously, we discussed a lot more than what I’m able to include here. Please ask if you want elaboration on any of these points.

Mike Treder

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Nanofacturing Economics

In response to my post a few days ago, "Reader's-Eye View of Nanotechnology Economics," John B wrote an insightful comment about post-nanofactory scarcity.

I agree with John B that nanofacture won't eliminate scarcity, just shift what's scarce. In my version of utopia, it would increase the set of things that are effectively free, like drinking water and air. (Tap water isn't literally free in the US, but for purposes of drinking, it is too cheap to meter.)

Drinking water is an interesting example. Two things to note: First, safe drinking water is not free in many parts of the world -- not even available in some -- despite the existence (elsewhere) of enough technology to provide it many times over. Second, lots of Americans pay more for drinking water than for gasoline, thanks to marketing, convenience, marketing, bad-tasting tap water, and marketing.

So the dystopian scenario is easy to see: Nanofactories produce amazing amounts of wealth and power -- which is concentrated away from most people to the point of poverty. This concentration might be due to corruption (not following the rules), or greed (following the rules to an undesirable conclusion), or social factors (education gap, infrastructure gap, etc).

In the utopian scenario, everyone has as much as they need of the basics, too cheap to meter. Everyone also has access to some amount of money to spend on marketed goods. Corporations can make massive amounts of money by selling $0.10-cent bottles of water for an order of magnitude higher price. They don't have to make the basics inaccessible -- just apply a bit of marketing, and most people will happily spend all their discretionary income.

I'm not enough of a macro-economist to know how to keep money in circulation in such a scenario. Probably a balance between reinvestment (which goes to salaries and infrastructure) and taxation (which funds government employees and sends some money/benefits to society as a whole).

Chris Phoenix

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The Next 30 Years

Not Necessarily Relevant Quote of the Week:

It is no exaggeration to predict that there will be more change in the next 30 years than we saw in all of the last 100.
— Philip J. Bond, Under Secretary of Commerce for Technology, U.S. Department of Commerce (March 18, 2004)

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Code of Conduct

The European Commission is drafting and adopting recommendations toward a Code of Conduct for Responsible Nanosciences and Nanotechnologies Research.

Currently, they are seeking "a broad sample of inputs emanating from research, industry, civil society, policy and media. More generally any person feeling concerned by the safe development of NST in Europe and at global level is welcome to contribute."

Got anything to say about it? Now's your chance!

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Mechanical Nanocomputer Proposed

Scientists at the University of Wisconsin-Madison, including Prof. Robert Blick, have proposed building a nanocomputer that works on a purely mechanical basis. Instead of shuffling electrons through circuits, it would physically move its atoms, with components pushing and pulling on each other to do computations. The molecular manufacturing community has been proposing a similar approach for at least two decades.

The news stories compare the proposal to Babbage's mechanical computer designs. However, I haven't yet found a description of exactly how the mechanisms would work. Babbage's machines, of course, used gears and cams -- lots of sliding interfaces between parts. And sliding is something that MEMS (micro-electro-mechanical systems) aren't very good at. The researchers have already built one component, using MEMS techniques, and expect their work to be commercially relevant in just a few years. So it's not clear how close the current designs are to Babbage's designs.

Eric Drexler proposed as far back as the mid-1980's that nanoscale mechanical computers could be built via molecular manufacturing. Drexler's designs used rods sliding in housings, with bumps that would interfere with the motion of other rods. This is not something that could be built with today's MEMS. So the detail of the designs probably doesn't owe much to Drexler's work. The overall concept -- that scaling laws allow nanoscale mechanisms to work at gigahertz speed -- is of course the same as Drexler's. Scaling laws are underappreciated but straightforward, so it's inevitable that both researchers took the same approach -- once they decided that mechanical nanocomputers were worth looking at.

Ralph Merkle worked on designs for a mechanical nanocomputer that would not require sliding interfaces, and published some in 1993. Without knowing the details of Blick's designs, it's impossible to say whether Blick owes anything to Merkle's work.

As Drexler pointed out, mechanical nanocomputers may be the most compact way to do computation; atoms don't tunnel nearly as easily as electrons do. This also means they may work at higher temperatures than electronic computers. And, because atoms tend to stay where you put them, it may be possible to spend less energy on avoiding errors. So as MEMS gets more precise, it may be possible to build useful mechanical nanocomputers with MEMS techniques.

Several of the press stories mentioned diamond as a possible nanocomputer construction material. Some MEMS are now being built out of diamond, so this should not be seen as a nod to Drexler's diamondoid proposals. In fact, it would have been nice if the press stories had acknowledged the conceptual leadership of the molecular manufacturing community (though I'm not surprised that they didn't). But the mention of diamond nanocomputers, as well as the more general idea of mechanical nanocomputers, may work to give long-overdue recognition to the basic soundness of Drexler's nanocomputer proposals.

Chris Phoenix

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Reader's-Eye View of Nanotechnology Economics

Khannea Suntzu writes to us with a comment about the economic implications of molecular manufacturing (ellipses are in original):

Nanotechnology is disastrous ! But what you are saying, there is no way to stop it ... But ....on the one hand it will cancel jobs on a fundamental scale, and nanotech nor society at large can't possibly create replacement jobs fast enough to keep people with some kind of humane income - ... and on the other hand people with knowledge, infrastructure and wealth will be a lot more capable of expanding their wealth.

Those who are poor will have a delay in catching up while those who are rich will get exponentially richer. So maybe in Europe we'll be able to cope, by implementing some kind of "basic income" and a sane level of taxing the ultra-rich- but I won't see that happen in the ideologically far right-capitalist US or the anarchic third world - so imagine a third world country somewhere in the year 2035, most home industries wiped into oblivion by nanotech minifacs, traditional agriculture wiped into oblivion by cheap biogenetics and superefficient nanotech based agriculture - those people would be without any product in demand, locked away from resources and raw materials, largely incapable of coping because of traditionalist lifestyles and largely incapable of catching up (and I don't even want to think about fundamentalists of one kind or another, who'll reject this concept alltogether!) ...

Am I right in assuming this will (and must) imply the effective end of capitalism as we know it? I.e. we need to start giving stuff away for free?

If we don't most people who are "locked out" will evolve into some form of criminal, right? I mean, try selling this conclusion to US republikans or neoconservatives !!!

These are the kinds of questions we wrestle with here at CRN. We don't have a full answer yet; indeed, we don't even know exactly what questions to ask, because we don't know whether molecular manufacturing will be accessible for legal civilian purposes. If it's only available on the black market, then it'll have less economic impact -- while having a very large negative impact on security and policing.

But if we figure that commercial interests will develop very inexpensive manufacturing of high-quality goods, then we have to ask several interesting questions: How much wealth concentration will result, and what will be the effects of that? How many people will be out of work? How will they get the necessary resources to live?

It does appear likely that product manufacturing, shipping, and warehousing costs will drop faster than prices, causing profits to rise at least for a while. I'm enough of a capitalist to believe that wealth concentration isn't automatically harmful. And I'm not enough of an economist to know whether extremes of wealth concentration can be directly harmful to an economy, or whether the harms are only indirect, through human psychology. It may be that falling prices will create new opportunities due to greater sales volume. This needs to be looked at in detail.

In the US, we went from tens of percent of the population farming, to about 2% farming, in just one century. That's a lot of people "out of work" but manufacturing filled the gap. If we go from tens of percent manufacturing to 2%, in a decade or less, will we find something else to fill the gap? Probably -- there are already more people in "service" jobs than in manufacturing. Will most individuals be able to find new jobs that provide a living wage? I don't know. I also don't know much about job breakdowns in other countries. Again, this needs to be looked at in detail.

If people are thrown out of work wholesale, can they stay alive and happy without receiving an employment wage? Even in the US, there are some interesting options. People living in Alaska are paid about $1000 per year by the government, just for living in a state with a lot of oil. If molecular manufacturing reshapes the economy, a similar but larger payment, funded by existing taxes on (much larger) corporate profits, might be a substantial help. There may be other ways of delivering money without going through the traditional charity infrastructures (welfare, religious charity, etc). And this also needs to be looked at in much more detail.

But the bottom line is that the resources available to people from molecular manufacturing, like so much else, will depend on policies that people and governments choose. If the Open Source model is allowed to coexist with the Commercial model, as we believe it should be, then there will be a readily-available nearly-free supply of the necessities of life -- along with a much more attractive and expensive supply of goods for those who can afford them.

On the other hand, it wouldn't be difficult to rig the game so that almost everyone got very poor and almost no one with influence cared. The best thing I can say about that scenario is that it would probably result in low levels of innovation; in the end, nations that allowed more innovation would out-compete the "concentration" model.

We believe that all these questions, along with questions of politics, policing, environment, and health, need to be studied in detail before molecular manufacturing arrives. So far, this is not looking very likely. As a result, civilization will blunder forward blindfolded, and probably trip on something.

Chris Phoenix

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Nanotech As Carbon Source?

In my previous post, I wrote that the most compact fuel for nanomachines would probably be diamond, in which case they'd dump carbon dioxide. Jamais Cascio pointed out that this could increase the earth's carbon dioxide load.

This is true. It's a special case of the general rule that an extremely powerful technology may either help or do harm, on each of a wide range of dimensions. In this case, molecular manufacturing should make it relatively efficient to pull CO2 out of the air and build the carbon into fuel. If nanomachines then burned the fuel, it would not add extra CO2 to the atmosphere. And stockpiling the fuel (which would be diamond dust - relatively inert) would reduce the atmosphere's CO2 load.

On the other hand, if coal was a more convenient source of carbon than atmospheric CO2, then nanomachines could continue the already-strong trend of burning fossil fuels and dumping the results. It would still be better than power plants, since the process would likely have efficiencies closer to fuel cells than to combusion, and all the other nasty stuff in coal (including radioactive elements) would be purified out before it was used as fuel.

Of course, to use atmospheric carbon dioxide, some other source of energy must be provided. Solar looks like a good candidate. Land-based solar cells in large quantity could cause habitat change and microclimate disruption. High-altitude solar cells (on aircraft) would be harder to engineer, but might supply a partial diffuse sun-shade (which might, with enough care, help to counteract some of the effects of global warming) and would not acutely affect the ground. (Even with today's technology, NASA has come close to building a high-altitude aircraft that could stay up overnight. Energy-gathering heavier-than-air aircraft should be quite feasible with diamondoid molecular manufacturing.)

It's also worth noting that mechanical energy storage devices (springs and flywheels) can have near-chemical energy density, and should be quite fast to recharge, and should require less machinery to extract the energy. So for some classes of nano-built robot, it may be better to include a mechanical "battery" than a fuel tank and conversion system.

Chris Phoenix

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Nanobots As Fuel-Air Explosives?

"Dagon" wrote to our Devil's Advocate address (found on several of our main website's pages) with several interesting thoughts. Here's a technical question he asked that's worth a public answer:

These machines need quite a bit of energy. The simplest "propellants" could be sugars or other carbohydrates. However I can see a determined escalation of ever more aggressive energy-carrying substances inside these things, making them potentially very reactive. Say for example a nano-agent has to perform a task in the open atmosphere, carrying a powerful propellant inside. If one is, for instance, electrocuted it might trigger a "dust explosion" of a swarm of such creatures. Likewise if a swarm of these critters enters an environment that damages them (bright sunlight, corrosives, radiation) the resulting "nanofactory cadavers" may prove a highly toxic or reactive. .... The more effective a nano-agent is supposed to be, the more energy-intensive, the more robust elements it should incorporate (halogens? heavy metals?)

There are actually three different questions here: (1) Will nanomachines burn in air? (2) Will they need exotic and dangerous substances as fuel for high performance? (3) Will damaged nanomachines be toxic?

1) Whether nanomachines will burn depends on what they're made of. Candidate materials include diamond (which will burn), silica and alumina (which won't), biopolymers (which will), combinations of the above, and possibly other materials (including fuel -- see answer 2 below). For combinations, whether the machine is flammable depends on whether its constituents will absorb the heat given off by the combustible fraction. And of course there are many other factors, including the concentration of dust, the size of the machine, and details of molecular construction. Some designs may include water tanks to reduce flammability.

2) Energy storage for nanomachines is an interesting topic that I don't have time to go into in detail. Fortunately, there's a lot of detail in section 6.2.3 of Robert Freitas's Nanomedicine I. Basically, it comes down to this: Chemical energy storage is the highest-density of any non-nuclear storage method. And if you have access to environmental oxygen and can dump CO2 overboard, then the highest energy density material is... diamond. Yep, plain old carbon, plus environmental oxygen, appears to out-compete anything arcane that would require storing both components. So the machine won't need toxic fuels. It's also worth noting (as Drexler suggested to me once) that diamond is extremely strong, so it can be built into springs or flywheels, which can store energy at near-chemical density, and then when that's used up, they can be oxidized. You can't do that with most materials.

3) The third question is whether damaged nanobots would be toxic. (Not every product of molecular manufacturing will be small, but most will contain small pieces, which might be released if the product is mechanically broken.) The answer: There is no simple answer. The fuel shouldn't be especially dangerous. A broken nanomachine would quickly stop working as it got dirty, so in general I wouldn't expect that its former function would lead to any danger. Would the inert parts be dangerous? Current designs of covalent-solid nanomachines would probably be as dangerous as other nanoparticles, which is to say, many will be relatively safe but more study is needed. Would chemical breakdown byproducts be dangerous? I wouldn't expect them to be more dangerous than other combustion byproducts; combustible covalent solids will probably be made of the same elements that, say, wood is made out of.

So, in summary, this is a very interesting topic, well worth considering, but my best initial estimate is that nanomachines won't need to incorporate materials that are unusually dangerous.

Chris Phoenix

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New AI Book

Josh Hall's new book on AI, Beyond A.I. -- Creating the Conscience of the Machine, has just been reviewed at Nanotech-Now.com.

Hall explores how artificial intelligence (AI) is now advancing at such a rapid clip that it has the potential to transform our world in ways both exciting and disturbing.

My opinion: Although molecular manufacturing will be one of the most transformative technologies in the next twenty years--perhaps even the next fifty years--it will not be the only one. Artificial intelligence appears to have a lot of potential for both benefit and harm. Even relatively mundane applications of relatively primitive technology could have major implications. And even AI researchers can't agree on the ultimate potential power of the technology.

The review's opinion: Josh's book is a useful examination of the ethics of machine intelligence.

Chris Phoenix

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