Category Archives: design

High-rise external evacuation

A quick googling turned up this great idea, using an escape chute attached to the top of a fire crane. The chute has a fireproof external layer and people slow or speed their descent in it simply by varying their posture. Read the pdf for more details:

http://www.escapeconsult.biz/download.php?module=prod&id=26

But the picture tells all you need to know. You can see it reaches very high, up to 100m with the tallest fire appliance.

It is a great idea, but you can still see how it could be improved, and the manufacturer may well already have better versions on the way.

Firstly, the truck is already leaning, even though it has extendable feet to increase the effective base area. This affects all free-standing fire rescue cranes and ladders (suspension ladders, or ladders able to lean against a wall obviously include other forces). Physics dictates that the center of gravity, with the evacuees included, must remain above the base or it will start to topple. The higher it reaches and the further from the truck, the harder that becomes, and the fewer people can simultaneously use the escape chute. Clearly if it is go even higher, we need to find new ways of keeping the base and center of gravity aligned, or to prevent it toppling by leaning the ladder securely against a sound piece of wall that isn’t above a fire.

One solution is obvious. Usually with a high-rise fire, a number of fire appliances would be there. By linking several appliances to the ladder in a stable pattern, the base area then becomes far larger, the entire area enclosed by the combined appliances. At the very least, they can spread out across a street, and sometimes as in the Grenfell Tower fire, there is a lot of nearby space to spread over. With a number of fire appliances, the crane is also not limited to the carrying capacity of a single appliance.

If theses are specialist hi-rise appliances, one or two would carry telescopic arms to support the rescue equipment, with one or more trucks using tension wires to increase the base area.

We also need to speed up entry to the chute and preferably make it accessible to more windows. The existing system has access via a small hole that might be slow to pass through, and challenging for larger people or those with less mobility. A funneled design would allow people to jump in from several windows or even drop from a floor above. Designing the access to prevent simultaneous arrivals at the chute is easy enough, even if several people jump in together

Also, it would be good if the chute could take evacuees away from the building and flames as fast as possible. Getting them to the ground is a lesser priority. Designing the funnel so it crosses several windows, with a steep slope away from the building (like an airplane escape slide) before it enters the downward chute would do that.

Another enhancement would be that instead of a broad funnel and single chute, a number of chutes could be suspended, with one for each window. Several people would be able to descend down different chutes at the same time. with a much broader base area, toppling risk would still be greatly reduced.

If a few support arms could be extended from the crane towards the building, that would provide extra stability until their strength (or building fabric) is compromised by fire. Further support might sometimes be available from window cleaning platform apparatus that could support the weight of the rescue chutes. If emergency escape chutes are built into the platforms could even make for an instant escape system before fire services arrive.

With these relatively straightforward enhancements, this evacuation system would be even better and would allow many people to escape who otherwise wouldn’t. OK, here’s a badly drawn pic:

Vertical solar farms, the next perpetual motion machine

I am a big fan of hydroponics. LED lighting allows growers to deliver a spectrum optimised for plant growth and they can get many times the productivity from a square metre inside under lighting than outside. In the right context, it’s a great idea. Here is a nice image from GE Reports , albeit with pointless scanning.

I don’t think much however of the various ‘futuristic’ artist impressions of external vertical farms with trees likely to fall on pedestrians from 20 floors up. Like this one, described as an ‘environmental alternative’. No it isn’t, its a daft idea that makes a pretty picture, not an alternative.

But as far as silliness is concerned, I suspect I can see one that is coming soon: the vertical solar farm. Here is how it will work, cough. Actually two ways.

PLEASE DON’T TAKE THE FOLLOWING SERIOUSLY!

A lot of external solar panels on a building will gather solar energy (or solar paint, whatever), and that wonderful renewable energy will then be used to power super-efficient LED lights, illuminating highly efficient solar panels inside. The LED banks and solar panels will be arranged in numerous layers to make lots of nice clean energy. The resultant ‘energy amplifier’ will appear.

A more complex version will use hydroponics instead, converting the externally gather solar energy into plant material to make biofuel to make energy to power the lights during the night.

Some clever-clogs will then work out that the external panels are not needed since the internal panels will make the light to power the LEDs 24/7. People will object, but they’ll just point at the rapidly growing efficiencies of both LEDs and solar panels, especially coupled to other enhancements such as picking the right spectrum for the LEDs. How can it not work?

You know as well as I do, I hope, that this is total nonsense and will remain so. However, you also know as well as I do that some people are very easily taken in. Personally, I can’t wait to see the first claims from some Green company. I wouldn’t be all that surprised if they manage to get a development grant. It would be hilarious if something like this makes it through a patent office somewhere. Perpetual machines don’t go extinct, they just evolve.

Actually, I’m more upset that it isn’t April 1st.

AI presents a new route to attack corporate value

As AI increases in corporate, social, economic and political importance, it is becoming a big target for activists and I think there are too many vulnerabilities. I think we should be seeing a lot more articles than we are about what developers are doing to guard against deliberate misdirection or corruption, and already far too much enthusiasm for make AI open source and thereby giving mischief-makers the means to identify weaknesses.

I’ve written hundreds of times about AI and believe it will be a benefit to humanity if we develop it carefully. Current AI systems are not vulnerable to the terminator scenario, so we don’t have to worry about that happening yet. AI can’t yet go rogue and decide to wipe out humans by itself, though future AI could so we’ll soon need to take care with every step.

AI can be used in multiple ways by humans to attack systems.

First and most obvious, it can be used to enhance malware such as trojans or viruses, or to optimize denial of service attacks. AI enhanced security systems already battle against adaptive malware and AI can probe systems in complex ways to find vulnerabilities that would take longer to discover via manual inspection. As well as AI attacking operating systems, it can also attack AI by providing inputs that bias its learning and decision-making, giving AI ‘fake news’ to use current terminology. We don’t know the full extent of secret military AI.

Computer malware will grow in scope to address AI systems to undermine corporate value or political campaigns.

A new route to attacking corporate AI, and hence the value in that company that relates in some way to it is already starting to appear though. As companies such as Google try out AI-driven cars or others try out pavement/sidewalk delivery drones, so mischievous people are already developing devious ways to misdirect or confuse them. Kids will soon have such activity as hobbies. Deliberate deception of AI is much easier when people know how they work, and although it’s nice for AI companies to put their AI stuff out there into the open source markets for others to use to build theirs, that does rather steer future systems towards a mono-culture of vulnerability types. A trick that works against one future AI in one industry might well be adaptable to another use in another industry with a little devious imagination. Let’s take an example.

If someone builds a robot to deliberately step in front of a self-driving car every time it starts moving again, that might bring traffic to a halt, but police could quickly confiscate the robot, and they are expensive, a strong deterrent even if the pranksters are hiding and can’t be found. Cardboard cutouts might be cheaper though, even ones with hinged arms to look a little more lifelike. A social media orchestrated campaign against a company using such cars might involve thousands of people across a country or city deliberately waiting until the worst time to step out into a road when one of their vehicles comes along, thereby creating a sort of denial of service attack with that company seen as the cause of massive inconvenience for everyone. Corporate value would obviously suffer, and it might not always be very easy to circumvent such campaigns.

Similarly, the wheeled delivery drones we’ve been told to expect delivering packages any time soon will also have cameras to allow them to avoid bumping into objects or little old ladies or other people, or cats or dogs or cardboard cutouts or carefully crafted miniature tank traps or diversions or small roadblocks that people and pets can easily step over but drones can’t, that the local kids have built from a few twigs or cardboard from a design that has become viral that day. A few campaigns like that with the cold pizzas or missing packages that result could severely damage corporate value.

AI behind websites might also be similarly defeated. An early experiment in making a Twitter chat-bot that learns how to tweet by itself was quickly encouraged by mischief-makers to start tweeting offensively. If people have some idea how an AI is making its decisions, they will attempt to corrupt or distort it to their own ends. If it is heavily reliant on open source AI, then many of its decision processes will be known well enough for activists to develop appropriate corruption tactics. It’s not to early to predict that the proposed AI-based attempts by Facebook and Twitter to identify and defeat ‘fake news’ will fall right into the hands of people already working out how to use them to smear opposition campaigns with such labels.

It will be a sort of arms race of course, but I don’t think we’re seeing enough about this in the media. There is a great deal of hype about the various AI capabilities, a lot of doom-mongering about job cuts (and a lot of reasonable warnings about job cuts too) but very little about the fight back against AI systems by attacking them on their own ground using their own weaknesses.

That looks to me awfully like there isn’t enough awareness of how easily they can be defeated by deliberate mischief or activism, and I expect to see some red faces and corporate account damage as a result.

PS

This article appeared yesterday that also talks about the bias I mentioned: https://techcrunch.com/2016/12/10/5-unexpected-sources-of-bias-in-artificial-intelligence/

Since I wrote this blog, I was asked via Linked-In to clarify why I said that Open Source AI systems would have more security risk. Here is my response:

I wasn’t intending to heap fuel on a dying debate (though since current debate looks the same as in early 1990s it is dying slowly). I like and use open source too. I should have explained my reasoning better to facilitate open source checking: In regular (algorithmic) code, programming error rate should be similar so increasing the number of people checking should cancel out the risk from more contributors so there should be no a priori difference between open and closed. However:

In deep learning, obscurity reappears via neural net weightings being less intuitive to humans. That provides a tempting hiding place.

AI foundations are vulnerable to group-think, where team members share similar world models. These prejudices will affect the nature of OS and CS code and result in AI with inherent and subtle judgment biases which will be less easy to spot than bugs and be more visible to people with alternative world models. Those people are more likely to exist in an OS pool than a CS pool and more likely to be opponents so not share their results.

Deep learning may show the equivalent of political (or masculine and feminine). As well as encouraging group-think, that also distorts the distribution of biases and therefore the cancelling out of errors can no longer be assumed.

Human factors in defeating security often work better than exploiting software bugs. Some of the deep learning AI is designed to mimic humans as well as possible in thinking and in interfacing. I suspect that might also make them more vulnerable to meta-human-factor attacks. Again, exposure to different and diverse cultures will show a non-uniform distribution of error/bias spotting/disclosure/exploitation.

Deep learning will become harder for humans to understand as it develops and becomes more machine dependent. That will amplify the above weaknesses. Think of optical illusions that greatly distort human perception and think of similar in advanced AI deep learning. Errors or biases that are discovered will become more valuable to an opponent since they are less likely to be spotted by others, increasing their black market exploitation risk.

I have not been a programmer for over 20 years and am no security expert so my reasoning may be defective, but at least now you know what my reasoning was and can therefore spot errors in it.

Colour changing cars, everyday objects and makeup

http://www.theverge.com/2016/11/24/13740946/dutch-scientists-use-color-changing-graphene-bubbles-to-create-mechanical-pixels shows how graphene can be used to make displays with each pixel changing colour according to mechanical deformation.

Meanwhile, Lexus have just created a car with a shell covered in LEDs so it can act as a massive display.

http://www.theverge.com/2016/12/5/13846396/lexus-led-lit-is-colors-dua-lipa-vevo

In 2014 I wrote about using polymer LED displays for future Minis so it’s nice to see another prediction come true.

Looking at the mechanical pixels though, it is clear that mechanical pixels could respond directly to sound, or to turbulence of passing air, plus other vibration that arises from motion on a road surface, or the engine. Car panel colours could change all the time powered by ambient energy. Coatings on any solid objects could follow, so people might have plenty of shimmering colours in their everyday environment. Could. Not sure I want it, but they could.

With sound as a control system, sound wave generators at the edges or underneath such surfaces could produce a wide variety of pleasing patterns. We could soon have furniture that does a good impression of being a cuttlefish.

I often get asked about smart makeup, on which I’ve often spoken since the late 90s. Thin film makeup displays could use this same tech. So er, we could have people with makeup pretending to be cuttlefish too. I think I’ll quit while I’m ahead.

Sky-lines – The Solar Powered Future of Air Travel

High altitude solar array to power IT and propel planes

High altitude solar array to power IT and propel planes

A zero carbon air travel solution. Well, most of the bits would be made of carbon materials, but it wouldn’t emit any CO2.

The pic says it all. A linear solar farm suspended in the high atmosphere to provide an IT platform for sensors, comms and other functions often accomplished by low orbit satellite. It would float up there thanks to being fixed to a graphene foam base layer that can be made lighter than helium (my previous invention, see https://timeguide.wordpress.com/2013/01/05/could-graphene-foam-be-a-future-helium-substitute/ which has since been prototyped and proven to be extremely resilient to high pressures too). Ideally, it would go all the way around the world, in various inclinations at different altitudes to provide routes to many places. Carbon materials are also incredibly strong so the line can be made as strong as can reasonably be required.

The flotation layer also supports a hypersonic linear induction motor that could provide direct propulsion to a hypersonic glider or to electric fans on a powered plane. Obviously this could also provide a means of making extremely low earth orbit satellites that continuously circumnavigate the ring.

I know you’re asking already how the planes get up there. There are a few solutions. Tethers could come all the way to ground level to airports, and electric engines would be used to get to height where the plane would pick up a sled-link.

Alternatively, stronger links to the ground would allow planes to be pulled up by sleds, though this would likely be less feasible.

Power levels? Well, the engines on a Boeing 777 generate about 8.25MW. A high altitude solar cell, above clouds could generate 300W per square metre. So a 777 equivalent plane needs 55km of panels if the line is just one metre wide. That means planes need to be at least that distance apart, but since that equates to around a minute, that is no barrier at all.

If you still doubt this, the Hyperloop was just a crazy idea a century ago too.

Carbethium, a better-than-scifi material

How to build one of these for real:

Light_bridge

Halo light bridge, from halo.wikia.com

Or indeed one of these:

From halo.wikia.com

From halo.wikia.com

I recently tweeted that I had an idea how to make the glowy bridges and shields we’ve seen routinely in sci-fi games from Half Life to Destiny, the bridges that seem to appear in a second or two from nothing across a divide, yet are strong enough to drive tanks over, and able to vanish as quickly and completely when they are switched off. I woke today realizing that with a bit of work, that it could be the basis of a general purpose material to make the tanks too, and buildings and construction platforms, bridges, roads and driverless pod systems, personal shields and city defense domes, force fields, drones, planes and gliders, space elevator bases, clothes, sports tracks, robotics, and of course assorted weapons and weapon systems. The material would only appear as needed and could be fully programmable. It could even be used to render buildings from VR to real life in seconds, enabling at least some holodeck functionality. All of this is feasible by 2050.

Since it would be as ethereal as those Halo structures, I first wanted to call the material ethereum, but that name was already taken (for a 2014 block-chain programming platform, which I note could be used to build the smart ANTS network management system that Chris Winter and I developed in BT in 1993), and this new material would be a programmable construction platform so the names would conflict, and etherium is too close. Ethium might work, but it would be based on graphene and carbon nanotubes, and I am quite into carbon so I chose carbethium.

Ages ago I blogged about plasma as a 21st Century building material. I’m still not certain this is feasible, but it may be, and it doesn’t matter for the purposes of this blog anyway.

https://timeguide.wordpress.com/2013/11/01/will-plasma-be-the-new-glass/

Around then I also blogged how to make free-floating battle drones and more recently how to make a Star Wars light-saber.

https://timeguide.wordpress.com/2013/06/23/free-floating-ai-battle-drone-orbs-or-making-glyph-from-mass-effect/

https://timeguide.wordpress.com/2015/11/25/how-to-make-a-star-wars-light-saber/

Carbethium would use some of the same principles but would add the enormous strength and high conductivity of graphene to provide the physical properties to make a proper construction material. The programmable matter bits and the instant build would use a combination of 3D interlocking plates, linear induction,  and magnetic wells. A plane such as a light bridge or a light shield would extend from a node in caterpillar track form with plates added as needed until the structure is complete. By reversing the build process, it could withdraw into the node. Bridges that only exist when they are needed would be good fun and we could have them by 2050 as well as the light shields and the light swords, and light tanks.

The last bit worries me. The ethics of carbethium are the typical mixture of enormous potential good and huge potential for abuse to bring death and destruction that we’re learning to expect of the future.

If we can make free-floating battle drones, tanks, robots, planes and rail-gun plasma weapons all appear within seconds, if we can build military bases and erect shield domes around them within seconds, then warfare moves into a new realm. Those countries that develop this stuff first will have a huge advantage, with the ability to send autonomous robotic armies to defeat enemies with little or no risk to their own people. If developed by a James Bond super-villain on a hidden island, it would even be the sort of thing that would enable a serious bid to take over the world.

But in the words of Professor Emmett Brown, “well, I figured, what the hell?”. 2050 values are not 2016 values. Our value set is already on a random walk, disconnected from any anchor, its future direction indicated by a combination of current momentum and a chaos engine linking to random utterances of arbitrary celebrities on social media. 2050 morality on many issues will be the inverse of today’s, just as today’s is on many issues the inverse of the 1970s’. Whatever you do or however politically correct you might think you are today, you will be an outcast before you get old: https://timeguide.wordpress.com/2015/05/22/morality-inversion-you-will-be-an-outcast-before-youre-old/

We’re already fucked, carbethium just adds some style.

Graphene combines huge tensile strength with enormous electrical conductivity. A plate can be added to the edge of an existing plate and interlocked, I imagine in a hexagonal or triangular mesh. Plates can be designed in many diverse ways to interlock, so that rotating one engages with the next, and reversing the rotation unlocks them. Plates can be pushed to the forward edge by magnetic wells, using linear induction motors, using the graphene itself as the conductor to generate the magnetic field and the design of the structure of the graphene threads enabling the linear induction fields. That would likely require that the structure forms first out of graphene threads, then the gaps between filled by mesh, and plates added to that to make the structure finally solid. This would happen in thickness as well as width, to make a 3D structure, though a graphene bridge would only need to be dozens of atoms thick.

So a bridge made of graphene could start with a single thread, which could be shot across a gap at hundreds of meters per second. I explained how to make a Spiderman-style silk thrower to do just that in a previous blog:

https://timeguide.wordpress.com/2015/11/12/how-to-make-a-spiderman-style-graphene-silk-thrower-for-emergency-services/

The mesh and 3D build would all follow from that. In theory that could all happen in seconds, the supply of plates and the available power being the primary limiting factors.

Similarly, a shield or indeed any kind of plate could be made by extending carbon mesh out from the edge or center and infilling. We see that kind of technique used often in sci-fi to generate armor, from lost in Space to Iron Man.

The key components in carbetheum are 3D interlocking plate design and magnetic field design for the linear induction motors. Interlocking via rotation is fairly easy in 2D, any spiral will work, and the 3rd dimension is open to any building block manufacturer. 3D interlocking structures are very diverse and often innovative, and some would be more suited to particular applications than others. As for linear induction motors, a circuit is needed to produce the travelling magnetic well, but that circuit is made of the actual construction material. The front edge link between two wires creates a forward-facing magnetic field to propel the next plates and convey enough intertia to them to enable kinetic interlocks.

So it is feasible, and only needs some engineering. The main barrier is price and material quality. Graphene is still expensive to make, as are carbon nanotubes, so we won’t see bridges made of them just yet. The material quality so far is fine for small scale devices, but not yet for major civil engineering.

However, the field is developing extremely quickly because big companies and investors can clearly see the megabucks at the end of the rainbow. We will have almost certainly have large quantity production of high quality graphene for civil engineering by 2050.

This field will be fun. Anyone who plays computer games is already familiar with the idea. Light bridges and shields, or light swords would appear much as in games, but the material would likely  be graphene and nanotubes (or maybe the newfangled molybdenum equivalents). They would glow during construction with the plasma generated by the intense electric and magnetic fields, and the glow would be needed afterward to make these ultra-thin physical barriers clearly visible,but they might become highly transparent otherwise.

Assembling structures as they are needed and disassembling them just as easily will be very resource-friendly, though it is unlikely that carbon will be in short supply. We can just use some oil or coal to get more if needed, or process some CO2. The walls of a building could be grown from the ground up at hundreds of meters per second in theory, with floors growing almost as fast, though there should be little need to do so in practice, apart from pushing space vehicles up so high that they need little fuel to enter orbit. Nevertheless, growing a  building and then even growing the internal structures and even furniture is feasible, all using glowy carbetheum. Electronic soft fabrics, cushions and hard surfaces and support structures are all possible by combining carbon nanotubes and graphene and using the reconfigurable matter properties carbethium convents. So are visual interfaces, electronic windows, electronic wallpaper, electronic carpet, computers, storage, heating, lighting, energy storage and even solar power panels. So is all the comms and IoT and all the smart embdedded control systems you could ever want. So you’d use a computer with VR interface to design whatever kind of building and interior furniture decor you want, and then when you hit the big red button, it would appear in front of your eyes from the carbethium blocks you had delivered. You could also build robots using the same self-assembly approach.

If these structures can assemble fast enough, and I think they could, then a new form of kinetic architecture would appear. This would use the momentum of the construction material to drive the front edges of the surfaces, kinetic assembly allowing otherwise impossible and elaborate arches to be made.

A city transport infrastructure could be built entirely out of carbethium. The linear induction mats could grow along a road, connecting quickly to make a whole city grid. Circuit design allows the infrastructure to steer driverless pods wherever they need to go, and they could also be assembled as required using carbethium. No parking or storage is needed, as the pod would just melt away onto the surface when it isn’t needed.

I could go to town on military and terrorist applications, but more interesting is the use of the defense domes. When I was a kid, I imagined having a house with a defense dome over it. Lots of sci-fi has them now too. Domes have a strong appeal, even though they could also be used as prisons of course. A supply of carbetheum on the city edges could be used to grow a strong dome in minutes or even seconds, and there is no practical limit to how strong it could be. Even if lasers were used to penetrate it, the holes could fill in in real time, replacing material as fast as it is evaporated away.

Anyway, lots of fun. Today’s civil engineering projects like HS2 look more and more primitive by the day, as we finally start to see the true potential of genuinely 21st century construction materials. 2050 is not too early to expect widespread use of carbetheum. It won’t be called that – whoever commercializes it first will name it, or Google or MIT will claim to have just invented it in a decade or so, so my own name for it will be lost to personal history. But remember, you saw it here first.

Politics needs change, not unity

The UK is suffering division, so our politicians and media are calling for unity. It is old wisdom that you can’t make a silk purse out of a sow’s ear. The old-style parties no longer represent the people. Some Conservative ministers could just as easily belong to Labour. There was very little to distinguish Cameron from Blair, and Theresa May is another Blairite. What’s the point of a Conservative Party that’s half full of MPs that could as easily have stood under a Labour banner?

With disintegrations, resignations and rebellions all round, this is a better time than ever to reform the parties. We need a clear spread of easily distinguishable and well-focused alternatives to choose from. The old main parties adopted indistinguishable values to capture the same chunk of the electorate, only differing in competence, so voters who didn’t share those values felt disenfranchised and responded by moving to the fringes. In a referendum where people had to choose between quite different value sets, all of the existing parties except UKIP and the vast majority of politicians occupied the same space, and collectively only actually represented 48% of the population. The important views of half the electorate were shared by only a quarter of politicians, while the other half had three quarters, or three times as much representation. Now that the referendum has been won, UKIP has no lingering purpose so could also be thrown into the mix to redesign new parties.

Having half of the population represented by three times as many MPs as the other half is bad democracy, but instead of trying to take a lead by fixing it, it looks likely that the Conservatives will try to preserve the unfairness by selecting Theresa May, rambling on about the need to restore unity. Unity of the half that are represented, while still keeping the other disenfranchised? That’s how revolutions and civil wars start, probably, though history isn’t my strong point.

We have the Greens and Corbyn offering a clear-cut far left. A few sacked UKIP candidates and some ex-BNP people could field a tiny far right too. Labour, LibDems and Conservatives are all badly in need of reinvention, while UKIP has done its job so can also be thrown in the mix. They should all discuss things with one another until they finally discover what their real differences are, and form new parties. Usefully, they could also agree that they actually all share some values in common. Everyone wants fairness, nobody wants racism, everyone wants to end poverty, nobody wants an unhealthy environment or pollution, everyone wants good health care and to look after the ill, the weak, the disadvantaged, everyone wants to educate kids and to make a strong economy. If they disagree on how to accomplish these common goals, then they should work out clear differences that can be offered to the electorate. If differences on such issues are minor, then they could agree to use cross party committees to manage those things and focus elections on their bigger differences.

If that was all accomplished, politicians would stand for clear values and clear approaches. They would no longer have to pretend that they want exactly the same things and avoiding every answering a question.

Our parties served the country well in the 20th century. It has become absolutely clear that they are not suited to the 21st. We do not need unity and a return to normal, because that normal only worked for a fraction of the population. We don’t need any more Blairs, any more fudges, any more pretense. We do need a total remix, a redesign, a re-crystallization along new axes, with very different parties that different people can vote for.

The future of vacuum cleaners

Dyson seems pretty good in vacuum cleaners and may well have tried this and found it doesn’t work, but then again, sometimes people in an industry can’t see the woods for the trees so who knows, there may be something in this:

Our new pet cat Jess, loves to pick up soft balls with a claw and throw them, and catch them again. Retractable claws are very effective.IMG_6689- Jess (2)

Jess the cat

At a smaller scale, velcro uses tiny little hooks to stick together, copying burs from nature.

Suppose you make a tiny little ball that has even tinier little retractable spines or even better, hooks. And suppose you make them by the trillion and make a powder that your vacuum cleaner attachment first sprinkles onto a carpet, then agitates furiously and quickly, and thus gets the hooks to stick to dirt, pull it off the surface and retract (so that the balls don’t stick to the carpet) and then you suck the whole lot into the machine. Since the balls have a certain defined specification, they are easy to separate from the dirt and dust and reuse again straight away. So you get superior cleaning. Some of the balls would be lost each time, and some would get sucked up next time, but overall you’d need to periodically top up the reservoir.

The current approach is to beat the hell out of the carpet fibers with a spinning brush and that works fine, but I think adding the active powder might be better because it gets right in among the dirt and drags it kicking and screaming off the fibers.

So, ball design. Firstly, it doesn’t need to be ball shaped at all, and secondly it doesn’t need spines really, just to be able to rapidly change its shape so it gets some sort of temporary traction on a dirt particle to knock it off. What we need here is any structure that expands and contracts or dramatically changes shape when a force is applied, ideally resonantly. Two or three particles connected by a tether would move back and forwards under an oscillating electrostatic, electrical or magnetic field or even an acoustic wave. There are billions of ways of doing that and some would be cheaper than others to manufacture in large quantity. Chemists are brilliant at designing custom molecules with particular shapes, and biology has done that with zillions of enzymes too. Our balls would be pretty small but more micro-tech than nano-tech or molecular tech.

The vacuum cleaner attachment would thus spray this stuff onto the carpet and start resonating it with an EM field or sound waves. The little particles would wildly thrash around doing their micro-cleaning, yanking dirt free, and then they would be sucked back into the cleaner to be used again. The cleaner head doesn’t even need to have a spinning brush, the only moving parts would be the powder, though having an agitating brush might help get them deeper into the fabric I guess.

 

Smart packaging: Acoustic sterilisation

I should have written this on the ides of March, but hey ho. I was discussing packaging this morning for an IoT event.

Imagine a bacterium sitting on a package on a supermarket shelf is called Julius Caesar. Now imagine Brutus coming along with a particularly sharp knife and stabbing him hundreds of times. That’s my idea, just scaled down a bit.

selfsterilising

This started as a slight adaptation of an idea I developed for Dunlop a few years ago to make variable grip tires. (Still waiting for Dunlop to make those, so maybe some other tire company might pick up the idea).

The idea is very simple, to use tiny triangular structures embedded in the surface, and then pull the base of the triangle together, thereby pushing up the tip. My tire idea used electro-active polymers to do the pulling, and sharp carbon composites to do the grip bit, or in this antibacterial case, the sharp knife. Probably for packaging I’d use carbon nanotubes or similar as the sides with which to stab the bacteria, but engineers frequently come up with different nanostructure shapes so I’m pretty agnostic about material and shape. If it ruptures a bacterium, it will be good.

An easier to use alternative for widespread use in packaging would be to ditch the electro-active polymer and associated electronics, and instead to use a tuned acoustic wave to move the blades in and out of the surface. All that is needed to activate them is to put out that frequency of sound through a speaker system in the supermarket or factory. The sound needed would likely be ultrasonic, so it doesn’t irritate all the shoppers, and in any case, nano-structures will generally be associated with high frequencies.

So the packaging would include tiny structures that act as the dagger attached to a particular acoustic mass acting as Brutus, that would move when the appropriate resonant frequency is broadcast.

This technique doesn’t need any nasty chemicals, though it does need the nanostructures and sound and if they aren’t designed right, the nanostructures could be just as harmful. Anyway, that’s the basic idea.

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Self-sterilizing surfaces & packaging

selfsterilising