Re:There is an illusion today among younger people
on
Twilight of the Bomb
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· Score: 1
Any good final-year engineering or physics student could make a gun-type bomb and expect it to work first time.
Re:False dichotomy of the guilty conscience
on
Twilight of the Bomb
·
· Score: 1
The other reason Nagasaki had fewer casualties was that the bomb didn't ignite a firestorm. There were still fires of course, but not the kind of raging inferno that creates it's own tornado to feed itself. This is despite the higher yield of the second bomb.
Double False. Japan was trying very hard to avoid having to surrender.
They were trying to avoid unconditional surrender, i.e. they wanted to guarantee the survival of the emperor*, even if without power. They eventually surrendered when they were allowed this. The main things that caused Japan to surrender when they did were 1) The USA finally backing down on "unconditional" and 2) the threat of imminent Soviet invasion. That Soviet threat was the cause of 1) - the USA didn't want Japan to be occupied by the USSR.
If you read the minutes of the Japanese meetings when surrender was debated they atom bomb is barely mentioned, the vast Soviet army and the fate of the emperor dominated those discussions. The atomic bombs were no more destructive than the incendiary raids that had already caused Dresden-type firestorms in many Japanese cities.
*Westerners struggle to understand this, in a country where the emperor is worshipped as a living deity his execution for war crimes would have been seen less like hanging Harry Trueman and more like the crucifixion of Christ.
You can even do small mass production using 3D printers. For a few hundred/thousand pieces, it's likely cheaper to buy 3D printed stuff than to invest in injection molds.
There are moulding processes that are economical from a few tens of units. Mostly these involve making soft moulds from 3D printed forms and the moulds are good for perhaps 50 units each. They are slower though so if you want a hundred units quickly it might be better to print, and just contract out to multiple printing places if you need extra capacity to speed it up.
What do you think happens when you step on the gas pedal? Do you think it's still physically pulling some cable that opens flapper valves, allowing more fuel to flow into a carburetor?
I haven't worked on anything newer than about 10 years old but every fuel-injected petrol engine I've played with has had a mechanical butterfly valve operated by the pedal. The fancy electronics then measures mass flow rate (which is a function of throttle plate position, air temperature, air filter condition, engine rpm, etc) and injects the right amount of fuel. It's not *that* different from a mechanical carburettor except that carburettors measure volumetric flow and have to be tweaked for summer/winter to account for the different air inlet temperature
What about that transmission? Unless you drive manual, you're not actually moving gears around with that lever. You're sending a signal to a computer "Put it in drive" which was also designed by a programmer.
Where I'm from (UK) nearly everyone has a manual transmission:-)
I doubt natural gas gets from point a to point b by magic.
Natural gas is generally pumped around by turbines burning natural gas, it's cheaper but also happens to be immune to electrical problems. Failure of controls cause valves to stick in their last commanded position though so expect at least some problems with pressure fluctuations, etc.
Taking a 240V +/- 6% country and making it a 230V +10%/-6% country whilst not making any changes to the actual supply voltage doesn't sound all that much like a success story. (220V countries became 230V +6%/-10% and all new devices are designed for 230V +/-10%)
Even if the machine itself could handle it (i.e., had multiple material-handling streams), you would have a tough time getting the dissimilar metals to properly fuse
I find the idea of changing materials part-way through a piece interesting, you might not be able to fuse them but I'm imagining something similar to a dovetail joint, printed in place and utterly permanent. Essentially just mechanically interlocking the different materials during printing.
Do the spiral arms move w/respect to all the stars like some sorta density wave?
That's exactly what the spiral arms are, they can't be the same stars orbiting together in that shape as that would imply a rigid body rotation. The situation where everything moves around together as if it were nailed to a rigid cosmic disc doesn't work because the orbit time of the stars at the centre of the galaxy is less than that of the stars at the edge. This is a consequence of the orbital physics, it's essentially the only way the forces can balance.
So, the stars in the centre whiz around quickly (in cosmological time anyway) whilst the ones at the edge take forever. The spirals are simply areas of higher star density but they are not the same stars all the time. This region does rotate but more slowly than the stars contained within it. So, why are there areas of increased star density? No-one's entirely sure but it seems likely that these are actually regions with higher rates of star formation, with many young, short-lived blue stars.
80kg of water is about 136m^3 (4,800 cubic feet) of steam, so you'd better make sure there's a window open cos that's the volume of a cube with sides of nearly 17ft.
80kg of water is about 0.8m^3
80 kg of water is 0.08 m^3 (1 litre of water being a cube 0.1 meters each side and of mass 1kg), if you turn it into steam it expands by about 1700 so assuming atmospheric pressure gives 0.08*1700= 136 m^3 of steam as the OP stated.
This is well known to be possible, has been done for years, and you can buy commercial test equipment that sends spoof GPS signals (for testing GPS receivers obviously). More importantly there's another simpler way that cannot be dealt with by signing - just relay GPS signals from elsewhere.
If you capture GPS data at a point in space and retransmit the whole lot with enough power that the receiver sees only your signals then the receiver sees all the same phase relationships that put it in the location where you captured the data. It has no way of knowing it's been delayed by a few microseconds and signed GPS signals would look perfect. The only way around that is to compare it with inertial navigation, loran, etc or perhaps to have a very accurate clock on board to try and spot the extra delay.
Like you I'll not worry about it until I get a car with some silicon in it. It does have two germanium transistors in the tachometer though, maybe I should be worried:-P
This. After going off on a tangent about the unrelated (and already blocked and illegal) issue of child porn, which he deliberately conflates with porn in general, he then throws this in. I have no idea what it's supposed to mean.
Ignore the comments about moving out - I know how hard it is at the moment. But seriously, just tell your mum you want to watch porn, you're 26 and there's nothing wrong with it. Thinking all porn is illegal probably makes her a Daily Fail reader right?
You can make a gun-type bomb with impure plutonium, what you can't do is make one short enough to deliver in a missile or a plane. Built diagonally on the 100th floor of an office building or more feasibly at ground level in a dockside warehouse however....
You "just" need to increase the assembly velocity, and there are ways of doing that which are simpler than building an implosion device. And as you point out a fizzle is still a significant yield, and much dirtier.
Give a final year physics student a mechanical workshop and the plutonium, all they'd need is the funding.
when their bottle supplier decides to call it a day
Unlikely to change for that reason. Cheap beers might come in standard bottles but premium beers tend to have custom bottles anyway with brand names and logos in the glass. As long as they see a benefit in branded bottles they can have them made any size they like at no change in the cost.
Canned beer is virtually all in 330ml quantities
I assume you're Australian then? In the UK canned beer is 440 ml or 500 ml. Only soft drinks tend to come in 330 ml cans. 250 ml bottles are very rare here but 330 ml is common for many imported beers.
Pounds are a measure of force. The mass unit you are looking for is the slug.
It's not so bad until people start using pounds force and pounds mass interchangeably and cancelling quantities against each other that are not dimensionally equivalent
I would like to include rape for the death penalty but the Supreme Court has said no, that's too cruel.
You absolutely should not have the same punishment for rape as for murder. Doing so gives rapists a big incentive to kill their victims: without the victim as a witness they're much less likely to get caught and if the penalty is identical....
This should hold true whether you think the death penalty is a good idea or not.
Not really necessary if you just have a copper plate connected with copper wires. There won't be any electrolytic action so long as that RF ground is d.c. isolated from everything else metallic i.e. you couple it to your radio via a low-leakage capacitor that is transparent to the RF but doesn't allow any d.c. currents to circulate between that copper plate and anything else that is metallic and immersed in the sea water.
The IMEI is not just "easily readable" it's sent unencrypted whenever a call is made. This was a deliberate design choice, it could have been sent after the encrypted connection was established but the writers of the specification chose otherwise - the motivations for this have never been explained but a lot of people have drawn their own conclusions.
In any case my point is that it's even easier than TFA suggests to obtain someone's IMEI.
Slashdot Mirror
Any good final-year engineering or physics student could make a gun-type bomb and expect it to work first time.
The other reason Nagasaki had fewer casualties was that the bomb didn't ignite a firestorm. There were still fires of course, but not the kind of raging inferno that creates it's own tornado to feed itself. This is despite the higher yield of the second bomb.
Double False. Japan was trying very hard to avoid having to surrender.
They were trying to avoid unconditional surrender, i.e. they wanted to guarantee the survival of the emperor*, even if without power. They eventually surrendered when they were allowed this. The main things that caused Japan to surrender when they did were 1) The USA finally backing down on "unconditional" and 2) the threat of imminent Soviet invasion. That Soviet threat was the cause of 1) - the USA didn't want Japan to be occupied by the USSR.
If you read the minutes of the Japanese meetings when surrender was debated they atom bomb is barely mentioned, the vast Soviet army and the fate of the emperor dominated those discussions. The atomic bombs were no more destructive than the incendiary raids that had already caused Dresden-type firestorms in many Japanese cities.
*Westerners struggle to understand this, in a country where the emperor is worshipped as a living deity his execution for war crimes would have been seen less like hanging Harry Trueman and more like the crucifixion of Christ.
You can even do small mass production using 3D printers. For a few hundred/thousand pieces, it's likely cheaper to buy 3D printed stuff than to invest in injection molds.
There are moulding processes that are economical from a few tens of units. Mostly these involve making soft moulds from 3D printed forms and the moulds are good for perhaps 50 units each. They are slower though so if you want a hundred units quickly it might be better to print, and just contract out to multiple printing places if you need extra capacity to speed it up.
What do you think happens when you step on the gas pedal? Do you think it's still physically pulling some cable that opens flapper valves, allowing more fuel to flow into a carburetor?
I haven't worked on anything newer than about 10 years old but every fuel-injected petrol engine I've played with has had a mechanical butterfly valve operated by the pedal. The fancy electronics then measures mass flow rate (which is a function of throttle plate position, air temperature, air filter condition, engine rpm, etc) and injects the right amount of fuel. It's not *that* different from a mechanical carburettor except that carburettors measure volumetric flow and have to be tweaked for summer/winter to account for the different air inlet temperature
What about that transmission? Unless you drive manual, you're not actually moving gears around with that lever. You're sending a signal to a computer "Put it in drive" which was also designed by a programmer.
Where I'm from (UK) nearly everyone has a manual transmission :-)
I doubt natural gas gets from point a to point b by magic.
Natural gas is generally pumped around by turbines burning natural gas, it's cheaper but also happens to be immune to electrical problems. Failure of controls cause valves to stick in their last commanded position though so expect at least some problems with pressure fluctuations, etc.
Taking a 240V +/- 6% country and making it a 230V +10%/-6% country whilst not making any changes to the actual supply voltage doesn't sound all that much like a success story. (220V countries became 230V +6%/-10% and all new devices are designed for 230V +/-10%)
Even if the machine itself could handle it (i.e., had multiple material-handling streams), you would have a tough time getting the dissimilar metals to properly fuse
I find the idea of changing materials part-way through a piece interesting, you might not be able to fuse them but I'm imagining something similar to a dovetail joint, printed in place and utterly permanent. Essentially just mechanically interlocking the different materials during printing.
Do the spiral arms move w/respect to all the stars like some sorta density wave?
That's exactly what the spiral arms are, they can't be the same stars orbiting together in that shape as that would imply a rigid body rotation. The situation where everything moves around together as if it were nailed to a rigid cosmic disc doesn't work because the orbit time of the stars at the centre of the galaxy is less than that of the stars at the edge. This is a consequence of the orbital physics, it's essentially the only way the forces can balance.
So, the stars in the centre whiz around quickly (in cosmological time anyway) whilst the ones at the edge take forever. The spirals are simply areas of higher star density but they are not the same stars all the time. This region does rotate but more slowly than the stars contained within it. So, why are there areas of increased star density? No-one's entirely sure but it seems likely that these are actually regions with higher rates of star formation, with many young, short-lived blue stars.
80kg of water is about 136m^3 (4,800 cubic feet) of steam, so you'd better make sure there's a window open cos that's the volume of a cube with sides of nearly 17ft.
80kg of water is about 0.8m^3
80 kg of water is 0.08 m^3 (1 litre of water being a cube 0.1 meters each side and of mass 1kg), if you turn it into steam it expands by about 1700 so assuming atmospheric pressure gives 0.08*1700= 136 m^3 of steam as the OP stated.
This is clearly an agent who has never been to a beach. You don't even have to sit down and it'll be everywhere.
This is well known to be possible, has been done for years, and you can buy commercial test equipment that sends spoof GPS signals (for testing GPS receivers obviously). More importantly there's another simpler way that cannot be dealt with by signing - just relay GPS signals from elsewhere.
If you capture GPS data at a point in space and retransmit the whole lot with enough power that the receiver sees only your signals then the receiver sees all the same phase relationships that put it in the location where you captured the data. It has no way of knowing it's been delayed by a few microseconds and signed GPS signals would look perfect. The only way around that is to compare it with inertial navigation, loran, etc or perhaps to have a very accurate clock on board to try and spot the extra delay.
Like you I'll not worry about it until I get a car with some silicon in it. It does have two germanium transistors in the tachometer though, maybe I should be worried :-P
Why be ashamed of it?
This. After going off on a tangent about the unrelated (and already blocked and illegal) issue of child porn, which he deliberately conflates with porn in general, he then throws this in. I have no idea what it's supposed to mean.
Ignore the comments about moving out - I know how hard it is at the moment. But seriously, just tell your mum you want to watch porn, you're 26 and there's nothing wrong with it. Thinking all porn is illegal probably makes her a Daily Fail reader right?
You can make a gun-type bomb with impure plutonium, what you can't do is make one short enough to deliver in a missile or a plane. Built diagonally on the 100th floor of an office building or more feasibly at ground level in a dockside warehouse however....
You "just" need to increase the assembly velocity, and there are ways of doing that which are simpler than building an implosion device. And as you point out a fizzle is still a significant yield, and much dirtier.
Give a final year physics student a mechanical workshop and the plutonium, all they'd need is the funding.
In the UK BT does this. Their customers can use any of the hotspots for free and everyone else has to pay, no free hour.
when their bottle supplier decides to call it a day
Unlikely to change for that reason. Cheap beers might come in standard bottles but premium beers tend to have custom bottles anyway with brand names and logos in the glass. As long as they see a benefit in branded bottles they can have them made any size they like at no change in the cost.
Canned beer is virtually all in 330ml quantities
I assume you're Australian then? In the UK canned beer is 440 ml or 500 ml. Only soft drinks tend to come in 330 ml cans. 250 ml bottles are very rare here but 330 ml is common for many imported beers.
Posting to undo dodgy mod.
Replying to void incorrect mod.
Pounds are a measure of force. The mass unit you are looking for is the slug.
It's not so bad until people start using pounds force and pounds mass interchangeably and cancelling quantities against each other that are not dimensionally equivalent
I would like to include rape for the death penalty but the Supreme Court has said no, that's too cruel.
You absolutely should not have the same punishment for rape as for murder. Doing so gives rapists a big incentive to kill their victims: without the victim as a witness they're much less likely to get caught and if the penalty is identical....
This should hold true whether you think the death penalty is a good idea or not.
Not really necessary if you just have a copper plate connected with copper wires. There won't be any electrolytic action so long as that RF ground is d.c. isolated from everything else metallic i.e. you couple it to your radio via a low-leakage capacitor that is transparent to the RF but doesn't allow any d.c. currents to circulate between that copper plate and anything else that is metallic and immersed in the sea water.
The IMEI is not just "easily readable" it's sent unencrypted whenever a call is made. This was a deliberate design choice, it could have been sent after the encrypted connection was established but the writers of the specification chose otherwise - the motivations for this have never been explained but a lot of people have drawn their own conclusions.
In any case my point is that it's even easier than TFA suggests to obtain someone's IMEI.