Re: A very neat hack.
"I'm wondering if the disk spins while it's being written?"
Yes it does
http://en.wikipedia.org/wiki/LightScribe
1181 publicly visible posts • joined 24 May 2010
That's the principle, the reality is far different!
Unfortunately to get these things working correctly takes hours and hours of fiddling with the machine, then hours and hours of fiddling with the models to get what you want.
Yes that plastic clip for a 40-50yo car costs £20, but if you include your time, usually it's cheaper to just buy the clip and enjoy the car.
The amount of energy required is dependent on how fast you want the machine to run, being a robot time is less of a consideration.
RepRap's typically run on about 100-150w (without heated bed), which is quite feasible with solar or an RTG.
Now obviously we have no figures for the current machine design, so a requirements analysis cannot be attempted without these numbers.
Space systems can be optimised to run more efficiently, due to the general funding advantage, this will help with feasibility.
The main issue won't be power, it will be all the other complex systems that will need to be built on Earth and shipped to the Moon that will drastically increase the cost and resultant viability of the operation.
The rock on the moon is porous, just like most rock here on Earth!
Yes if you cut tunnels into the surface of the moon this is beneficial as your habitat can have a greater mass helping to provide greater protection.
The weakness is that you need material (just as tunnelling here on Earth) to reinforce the structure and critically on the Moon, make it air tight.
The reason from ESA's perspective that this is beneficial, is that they (in theory) can regulate the material added and prevent weaknesses in the structure that may potentially expose the inhabitants to the Moon's virtually non-existent atmosphere.
I think a more logical solution is to take the proposed technology to one of the many discovered lava tubes (probably extinct ;) ) and reinforce the internal structure there.
You'd have the benefits of a tunnel, without needing a TBM and a low cost (relatively) solution.
Yes you don't wear a watch, but do you wear sunglasses?
I think this is where the distinction will be made, as long as they don't feel like you have a bowling ball strapped to your head, or give you significant eye strain as a result, I think this will be an interesting concept.
The glasses situation is a good point, will people requiring vision correction be required to wear contact lenses to use this?
The key to it's success as with most products will depend on it's benefit to cost ratio. If they try and pull the marketing must have and charge 3x price of a top end smartphone, I think it'll go the way of the early touchscreen devices, nice idea, but too expensive. Comparable to a top end SP or less (please, please, please! ;) ) and you may stand a chance of hitting the ground running.
This is why I like the concept of buried self contained nuclear generation systems, I believe most concepts are breeder based.
You build a 20-500MW reactor, bury it deep underground (ooh what about all those disused coal mines ;) ) and feed cables to the grid.
When it needs decommissioning, you turn it off, done. No clean up, no overheads. At least that is the theory.
If there is a problem, it's well away from people and while there is obviously a financial loss, it will be nothing like the clean up costs being experienced at say Fukushima or Chernobyl.
May be the key to kick starting the commercialisation of space.
There are lots of old satellites in parking orbits, now they may not be able to refuel them as:
A: They weren't designed for it.
B: Their systems are probably dead.
However they do possess a lot of processed materials that have the potential to be recycled, this is currently not cost effective due to launch costs, I.e. it's cheaper to put a new unit it up, than trying to recover old units.
But... If fuel was available relatively cheaply for recovery machines to move them to a location (on orbit) where the materials could be reused the capability to create on orbit systems may start to appear.
Given current launch costs this could potentially be quite lucrative.
I realise this is very idealistic, but at the same time if there is no dreaming then we will never get there.
The main issue I forsee is that existing satellites use hydrazine for thruster fuel, making hydrazine on orbit may be a challenge and that units intended for refuelling may need technology updates beyond the refuelling mechanisms.
Sounds like Nokia are trying to play the long game.
Android got into the market by appealing nerd/geek/[insert other stereotype] segment of the market. Some of this segment will be software engineers, which gets them interested in the App side.
So they sneakily had a dev base, before the system went mainstream, this is where WinPho 7/8 falls down. Windows Phone has been in the market for ages, and it's predecessors were absolute garbage. 7 and 8 are an improvement, but they missed the boat.
The only thing that may save them is that Apple appears to have lost it's direction.
The fundamental weakness in this concept is that the steam has run out on the 3D printing fad, simply because the stuff you get out of the affordable home machines is so crap and the amount of effort required to get these machines working correctly, far outweighs the benefits.
There will be resurgence when the off the shelf tech gets to an affordable price point, but to me this is a cliche headline marketing bumpf. Rather than a solution to a non-existent problem.
Given the 1984 states that many Governments security services would like, there would probably some form of regulation making this illegal.
Yes, this tech may prevent your face being recognised, but given it uses visible light. It is also obvious.
So as you are trying to fool the sensors, the sensors can detect that you are trying to fool them, making you a target.
T-800 heading straight for you!
1. You're making an assumption and on the basis of that assumption 'let's not bother!'
2. Life is extremely resilient, just because you couldn't be arsed and would give up and die! Doesn't mean the extremophiles wouldn't.
3. There are bacteria living in the ice in Antarctica, these are just one form of many extremophiles.
4. If life got started on Mars and the conditions at some of the time allow that life continue to exist, then there may be life there, unless we go a look we will never find out.
This is critical to understanding one of the fundamental questions, are we alone?
Life (in some form) on Mars indicates a wider spread of life throughout the Universe as it's not unique to the chemistry and conditions here on Earth.
Cost and safety/mission criticality.
90% of the code used in aircraft is there to detect when something goes wrong, this code is also implemented in different ways across different platforms with the results analysed and double checked.
There are very strict standards that must be adhered to for the code to be even allowed to go anywhere near a plane and then it needs to be further tested before it is allowed to fly.
As stated above, this is not infallible and still subject to human error.
The cost and time to implement these systems is astronomical compared to a PC operating system based application.
Is it possible to do it? Yes. Will a business do it, probably not, simply as the cost and timescales would put them so behind the market that the business would be bankrupt before they sold license 1.
Yes the engine was under development, but the original S5 design called for 2 large SRB's and an even bigger engine called the M-1.
The F-1 was developed for heavy lift capability by the US Airforce, but abandoned when they decided they didn't need it and resurrected at some point in the process for the S5.
The F-1 wasn't developed with the moon mission in mind.
Not just money...
Political and Commercial will.
There are currently no major Political gains from going to the moon other than maybe a few votes at an election.
There is currently no commercial benefit to being on the moon, yes there are many resources, but with no infrastructure, businesses see a huge expenditure for minimal gain and in the current climate of I want my 10%+ return in 6m, long term, risky adventures are not in their interest.
Won't someone think of the kids, because some of the nut jobs think that spending NASA's budget on feeding starving kids in various parts of the world is a better use of the cash, but I can personally think of a certain US government budget that wouldn't miss the money!
Simpler than that, all politicians families, financial backers, lobbyists, current mates, school mates and the entirety of Whitehall and their families.
Trust me, if they get it wrong, then they'll get it directly in the ear, which will result in them having a genuine, greater than 10 second attention span on the subject.
The malware in question is 'unspecified' no where in the article does this state that this was a targeted attack.
Or that the malware was designed to disrupt the operation of these systems.
The fact they got infected is obviously a major security fail, but no where is it stated that the reason the machines were infected was deliberate.
These can now be had for £250 sim free.
Albeit not the 4.7" powerhouse of the Nexus 4, in general use most people won't notice the difference.
They are also 16GB and have the 4.1.1 JB update, not the 4.2.
Some like HTC Sense, some don't, I personally prefer HTC's keyboard over the stock Android.
Your £8 drill bit will probably weigh in the region of 2-3kg, which would cost iro $200,000 in launch costs alone.
It would require a more powerful and heavier drill, increasing launch costs again dramatically
The arm controlling the drill would need to be much more powerful and stronger as a result, increasing weight and power requirements again.
The RTG only delivers 110w of electrical power, not the 3kw needed for your SDS drill. Assuming linear scale the RTG would need to be at least 27 times the size and weight.
Given the size and weight of this thing to mount your drill bit, they would probably need a new heavy launcher to actually get it to Mars.
Curiosity's budget is $2.5Bn, developing a new heavy launcher under government budgets is going to be at least $15Bn.
Developing larger elements of the systems will increase costs again.
I surmise that to add your £8 drill bit (which can't be changed if it fails btw) would increase the cost of the mission by 10x.
Saying there is 'no chance', is like saying to someone 200years ago that we'd all be walking round with personal communication devices.
Doing it in someone's lifetime would be a challenge, but 100-150 years is feasible. It would require more effort than is financially viable, but it's not impossible.
I see this being of greater benefit in a commercial environment, reduction of pesticide usage.
2kW from a tractor engine (may need a bigger alternator) is not a major challenge.
Secondly, if it were for home use, getting 2kW out of batteries for the few minutes it's used wouldn't be a major issue. May need a capacitor or 2, as the article states it only needs to operate for 1 second on each weed.
Getting it CE marked however would be an interesting challenge.