The various mk802 clones seem to typically ship with 2000mA power supplies and apparently often work even when powered from random USB ports. Their actual power consumption therefore cannot be all that different from the Pi.
The Pi model B throws away at least 75% of its power on voltage conversion/power regulation; a better design there would make it a lot easier to use batteries.
Hey, I picked up a microUSB 5V wall-wart supply for $9.99 at the local equivalent of Walmart
Yes, and it happened to work for you. You risk having to go through multiple different brands because a) USB wall-warts are generally crappy and lie about their specifications and b) the Pi power design is not very forgiving. Incidentally, the first hardware revisions were not just unforgiving but quite broken, but they were not pulled from the market and no replacements were offered.
We "just" need to get lithium air commercialised. Instant 5 times improvement. It may of course turn out to be impossible, but at this point things look fairly good.
Even if that is so, it will likely save private companies a lot of money by telling them what doesn't work. That is a lot of knowledge they do not have to each research and try to keep secret from each other.
Tesla uses plain boring AC motors without permanent magnets. Yes, the efficiency is a bit lower, but if we can get 5 times as much battery capacity, losing 5% on the motor without rare earth magnets doesn't seem all that bad.
If they mean 5 x energy density, that only seems realistic with a lithium-based chemistry. Anything seriously toxic you would want to use with lithium is heavy, so not likely for this project. It is unlikely that you would end up with a crappy power curve with lithium, but who knows.
As for shorting and ease of recharge and heat, those are rarely problems which need fundamental new thinking. A typical battery company research team should be able to handle those. It seems unlikely that the US government will enter the actual battery manufacturing business.
The loss of heat makes molten salt batteries impractical for house use. The bare minimum size that makes sense is probably somewhere like the size of the average house, but you really want them much much larger.
Perhaps the number of warheads was sufficient, but approximately all the realistic delivery vehicles were owned by the US! There is no way that the USSR would be able to deliver a significant blow to the US without using ICBM's, and the USSR just didn't have them.
The only way that nuclear war could destroy humanity in 1959 was if the US targeted itself with its own weapons, or the US completely failed to intercept USSR bombers. Neither is a realistic scenario.
Do you believe that the Cold War was just paranoia and psychosis? The US and the USSR were both expanding their "spheres of influence" as much as they could, doing everything from spreading propaganda and supporting insurgents up to fighting proxy wars. Perhaps the West was a bit paranoid since they were so far ahead both on conventional and nuclear forces that it would have been completely moronic for the East to start a war -- but on the other hand it was not entirely certain that the USSR regime was rational at all times.
What's the "legal grey area" answer for installing malware on someone else's machine?
There is none, installing software on a school-provided laptop is legal. At most it is breach of contract if the school has a policy against it, but that is a civil matter.
If there was intent to damage or to spy on someone other than the child, that would be a different matter.
And then the cop goes to jail for kicking the door in, since a private citizen isn't allowed to do that (in most cases the cop isn't either, admittedly).
One also might wonder why an FBI agent is using internal FBI resources to "scrub" a non FBI machine that isn't part of an investigation.
You know someone at work who can help with a particular task, and they are nice and help you out. If an employer cannot accept that, they should never expect the least bit of flexibility from the employees.
Fair enough, but in 1959 you were probably somewhat concerned about what havoc (almost-)conventional warfare could wreak.
At that time the number of warheads was insufficient to destroy humanity. An all-out nuclear war at that time would kill MUCH fewer people than the Second World War did, albeit quicker. Nuclear war was not at all unthinkable -- in fact, right at that time there was Air Force and CIA leaders which believed that the US would soon have an outright missile majority which would make a first strike possible and desirable.
It is quite likely that if the US had done a first strike during the Cuban missile crisis, the number of warheads striking the US would be in the low single digits, perhaps even zero. That particular atrocity could have saved the world from 25 more years of the USSR. Horrible? Of course. Unthinkable? Certainly not.
I am fairly sure that the pipeline is a myth. There certainly was no mention of it when I toured that particular Carlsberg factory (now almost dismantled).
The house does, however, come with free beer, but not by pipeline. Instead the workers would deliver the beer every day. I was told that when Niels Bohr first moved in, a worker came to the house and asked how much he wanted each day. Apparently he said "12". However, Carlsberg workers never count in single beer bottles, they count crates... At least there was enough beer.
What is stupid about it? At the time, the only true revenge weapon was the nuclear submarines, and the US in 1959 had just 5 of those.
You need an if-all-else-fails weapon, otherwise you have to keep your nuclear forces on high alert at all times to avoid losing to a first strike. Staying at high alert risks launching by mistake.
Once the destination has been entered, you rarely need to fiddle. When you do need to fiddle, it tends to be near the destination, typically not on the motorway. It is a lot easier to pull over in a residential area. Either that or you will be stationary in a queue on the motorway and asking the GPS for an alternative route, but in that case any stupid collision you might cause is unlikely to cause harm to people.
If you begin to wonder whether you missed the exit on the motorway and your route was planned using a map, you better hope that you have brought a passenger capable of reading maps.
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They fixed it in the latest release... I have tried it with the new ISO... works great. :)
No they didn't. Isochronous transfers are still broken.
The various mk802 clones seem to typically ship with 2000mA power supplies and apparently often work even when powered from random USB ports. Their actual power consumption therefore cannot be all that different from the Pi.
The Pi model B throws away at least 75% of its power on voltage conversion/power regulation; a better design there would make it a lot easier to use batteries.
Hey, I picked up a microUSB 5V wall-wart supply for $9.99 at the local equivalent of Walmart
Yes, and it happened to work for you. You risk having to go through multiple different brands because a) USB wall-warts are generally crappy and lie about their specifications and b) the Pi power design is not very forgiving. Incidentally, the first hardware revisions were not just unforgiving but quite broken, but they were not pulled from the market and no replacements were offered.
We "just" need to get lithium air commercialised. Instant 5 times improvement. It may of course turn out to be impossible, but at this point things look fairly good.
That could happen, but the Argonne National Laboratory is not known for spending millions on consultants or otherwise misusing money or resources.
If you have something to back up your prediction I would like to hear it.
5 x energy density of current commercial batteries is not at all in conflict with the laws of physics.
The free market is pretty crap at research. In the past, the large US corporations had proper research labs. Remember Xerox? Bell? IBM? Even HP?
Nowadays private companies have a very short horizon for returns on research. Anything which is at all speculative has no chance.
Even if that is so, it will likely save private companies a lot of money by telling them what doesn't work. That is a lot of knowledge they do not have to each research and try to keep secret from each other.
Tesla uses plain boring AC motors without permanent magnets. Yes, the efficiency is a bit lower, but if we can get 5 times as much battery capacity, losing 5% on the motor without rare earth magnets doesn't seem all that bad.
Or cheaper, inferior NiMH batteries would have stifled the research into lithium batteries.
If they mean 5 x energy density, that only seems realistic with a lithium-based chemistry. Anything seriously toxic you would want to use with lithium is heavy, so not likely for this project. It is unlikely that you would end up with a crappy power curve with lithium, but who knows.
As for shorting and ease of recharge and heat, those are rarely problems which need fundamental new thinking. A typical battery company research team should be able to handle those. It seems unlikely that the US government will enter the actual battery manufacturing business.
The loss of heat makes molten salt batteries impractical for house use. The bare minimum size that makes sense is probably somewhere like the size of the average house, but you really want them much much larger.
Perhaps the number of warheads was sufficient, but approximately all the realistic delivery vehicles were owned by the US! There is no way that the USSR would be able to deliver a significant blow to the US without using ICBM's, and the USSR just didn't have them.
If you do not believe me, read e.g. Did the US Military Plan a Nuclear First Strike for 1963. It is consistent with Betteridge's law of headlines though, so do not be disappointed that the answer is "no".
The only way that nuclear war could destroy humanity in 1959 was if the US targeted itself with its own weapons, or the US completely failed to intercept USSR bombers. Neither is a realistic scenario.
Do you believe that the Cold War was just paranoia and psychosis? The US and the USSR were both expanding their "spheres of influence" as much as they could, doing everything from spreading propaganda and supporting insurgents up to fighting proxy wars. Perhaps the West was a bit paranoid since they were so far ahead both on conventional and nuclear forces that it would have been completely moronic for the East to start a war -- but on the other hand it was not entirely certain that the USSR regime was rational at all times.
An FBI agent installed software on a machine on which he wasn't authorized. That's a crime.
Right, school gives your child a computer. You install Angry Birds on it. What crime is committed?
What's the "legal grey area" answer for installing malware on someone else's machine?
There is none, installing software on a school-provided laptop is legal. At most it is breach of contract if the school has a policy against it, but that is a civil matter.
If there was intent to damage or to spy on someone other than the child, that would be a different matter.
a cop kicks a door in and finds pot.
Cop to judge: "I did it as a private citizen!"
Judge: "Ok then. This is admissible."
And then the cop goes to jail for kicking the door in, since a private citizen isn't allowed to do that (in most cases the cop isn't either, admittedly).
One also might wonder why an FBI agent is using internal FBI resources to "scrub" a non FBI machine that isn't part of an investigation.
You know someone at work who can help with a particular task, and they are nice and help you out. If an employer cannot accept that, they should never expect the least bit of flexibility from the employees.
Fair enough, but in 1959 you were probably somewhat concerned about what havoc (almost-)conventional warfare could wreak.
At that time the number of warheads was insufficient to destroy humanity. An all-out nuclear war at that time would kill MUCH fewer people than the Second World War did, albeit quicker. Nuclear war was not at all unthinkable -- in fact, right at that time there was Air Force and CIA leaders which believed that the US would soon have an outright missile majority which would make a first strike possible and desirable.
It is quite likely that if the US had done a first strike during the Cuban missile crisis, the number of warheads striking the US would be in the low single digits, perhaps even zero. That particular atrocity could have saved the world from 25 more years of the USSR. Horrible? Of course. Unthinkable? Certainly not.
I am fairly sure that the pipeline is a myth. There certainly was no mention of it when I toured that particular Carlsberg factory (now almost dismantled).
The house does, however, come with free beer, but not by pipeline. Instead the workers would deliver the beer every day. I was told that when Niels Bohr first moved in, a worker came to the house and asked how much he wanted each day. Apparently he said "12". However, Carlsberg workers never count in single beer bottles, they count crates... At least there was enough beer.
Whether you believe THAT story is up to you.
What is stupid about it? At the time, the only true revenge weapon was the nuclear submarines, and the US in 1959 had just 5 of those.
You need an if-all-else-fails weapon, otherwise you have to keep your nuclear forces on high alert at all times to avoid losing to a first strike. Staying at high alert risks launching by mistake.
Touché
Once the destination has been entered, you rarely need to fiddle. When you do need to fiddle, it tends to be near the destination, typically not on the motorway. It is a lot easier to pull over in a residential area. Either that or you will be stationary in a queue on the motorway and asking the GPS for an alternative route, but in that case any stupid collision you might cause is unlikely to cause harm to people.
If you begin to wonder whether you missed the exit on the motorway and your route was planned using a map, you better hope that you have brought a passenger capable of reading maps.
What good is an ultrabook if I have to bring a monitor along to use it?
1366x768 is a good resolution for a 5" phone, and usable for a 7" tablet.
Do you really need a citation to show you that holding a map open on the steering wheel is unsafe?