Incomplete PDF Redaction Leaks Data From UK MoD
As others have noted, you can just replace the text with "[redacted]", which also removes the length guessing.
Some people have noted some (ridiculous) concerns (like file formats storing changes, which could simply be disabled, and should be caught by the audit procedure afterwards - there is an audit, right?!?). So if you really want the print-out-and-scan-in type of dumbed down method, then:
* save to a bitmap or jpeg.
* black out the text in there ...no need for the useless media conversion (print/scan).
Of course, that only works if you turn "track changes" off in word... :)
Last Days For Central IPv4 Address Pool
Most isp's don't give out ip6 addresses
Most home routers don't handle ip6 (apple is a notable exception here)
This is going to be a bit ugly for a while.
Quantum Setback For Warp Drives
Yeah but you need a massive amount of fuel to accelerate to C and then slow down again. About 40,000 times the size of the shuttle's boosters.
Perhaps this is why, despite our best efforts, no other civilization has contacted us. It's simply too hard to bridge the huuuuge gap between the stars.
Yes, if I was going to build a universe with all sorts of playthings in it, I'd probably separate the experiments with enough spacetime that when the odd experiment blows up it doesn't really affect any others around it.
Not that I think that the universe was actually designed, but if it was, that would be how I would do it.
CO2 To Fuel, Closing the "Carbon Loop"
If it was so easy to make cars twice as efficient, don't you think we would have done that already?
That line was put in for the SUV drivers out there. We have already made cars that are twice as efficient as a SUV.
However, there are whole new classes of hybrids out there that get good fuel efficiency. And some very efficient conventional engines. They just don't make it into many current vehicles. However, if we adopted these vehicles in a wide spread manner then the overall efficiency of the car fleet would probably nearly double.
Responding to an AC - I should feed the trolls....
CO2 To Fuel, Closing the "Carbon Loop"
There are two issues here.
The first - energy. It cant be avoided. To make fuel from CO2 you need energy. Nuclear, wind, solar. It doesn't matter what really, but you will need some input and this technology cannot address that.
The second - why do this. Actually, it makes sense to have a liquid fuel base. Transportation runs on liquid fuel as a store of energy. If we make liquid fuels from solar, for example, we can store solar energy in a useful form for when it is dark.
So without commenting on this particular technology - which everyone has quite rightly stated won't work without considering energy inputs - the general concept of creating a liquid fuel energy store has some merit.
Having said this, I've spent quite a bit of time looking at a rather different liquid fuel store which I think has more promise than hydrocarbons.
That fuel is ammonia.
Whilst its only half as energy dense as diesel, its not that hard to make from electricity. In fact, it can be made by electrolysis fairly easily, and this has been done for nearly 100 years. so its not exactly new technology.
Nor is the ability to use it in a standard internal combustion engine. In fact, it was being used as a fuel for buses over 60 years ago and it works in a standard engine with little modification.
Because its less energy dense than diesel, its a lot easier to make synthetically, but has enough energy per litre to be worthwhile. Whilst having half the range per litre of fuel is an inconvenience, I am sure that we could live pretty much as we do today with vehicle technology that is available today.
We either accept half the range, or build the fuel tanks twice as big, or maybe even make the cars twice as efficient. All of these are easy options really.
I think that we have all gotten so fixated on fossil fuels that we have ignored a really low technology solution here.