Simply by looking at the reactivity series, you can tell that copper is considerably less flammable than iron. OTOH, powdered copper burns with a nice green colour when tossed into a Bunsen flame.
For a practical standpoint, you could ask if steel wool burns in the temperatures of a CPU heatsink. Probably not, and this copper sponge is much less of a risk. Of course, if you like living on the edge, and tweaking CFLAGS is not enough, try an entire case made of a notoriously reactive metal.
basically means that for slower airflow, you need larger gaps for air to flow through. This is why the sponge is bad for heat dissipation, and great for insulation. It's kind of intuitive, but it's nice to have some science backing to it. Having a large surface is good, but it doesn't help if the airflow across the surface is limited.
On a side note, I've been on a quest for quiet cooling since the very early 2000s, incidentally after getting a physics degree. It's mostly in the last couple of years that I've started to see really sensible coolers in the general market. For example, the usual CPU cooler in the olden days had a fan pushing right against the CPU with minimal fins in between, meaning there's a considerable high-pressure centre with no airflow. No one with a fluid mechanics 101 would design crap like that. OTOH, the traditional CPU/mobo setting is a little problematic; first you put the most heat-concentrating element in the middle of everything, and then later you realize it needs cooling. (I'd put the CPU socket on the reverse side and use the case as a huge heatsink...) Now finally the designers have the sense of using a straight sideways airflow, combined with heat pipes. Why the fsck did this take so long?
I used to strive for pure passive cooling, but in the end I don't mind a large, slow fan -- it's enormously better than no fan, and still indistinguishable from other background noises. This is another nice thing to see in cooler designs, from the 1-inch whiner in my first Linux laptop to the 140-mm quiet giants that can easily manage a couple of hundred watts of GPU.
BTW, if you ever need to explain somebody how a heat pipe works, take them to a sauna.
Pushing this even further --- I have inherited a (mostly empty) 3,000 square foot data center (almost Tier III - but it shares a wall with the outside or so I'm told). I'm using (maybe) two racks.
Yeah, CPU-only coins last for about 48 hours before a GPU miner is released. As far as crypto-coins the fact is, a modern graphics card is faster than almost anything a CPU can do.
This applies mainly to those that simply choose a semi-standard hash algorithm, such as one of the SHA3 contestants or a combination thereof. Often there is GPU code already available, and building the miner is all about reading some specs and writing some glue code*. Also, most of these coins are based on Bitcoin and simply change the hash algo.
However, most Cryptonote coins (using the Cryptonight algo) have lasted for ages without an open GPU miner. For starters, they are not forked off Bitcoin. Boolberry is a Cryptonote coin with a different algo, which makes it faster to sync, while still aiming for GPU resistance. An open GPU mining codebase was released just a few days ago, and there's still work to do for general distribution. Besides, Boolberry's algorithm needs several MB of fast cache, which is OK with GPU texture cache at the moment, but it will grow over time, possibly making GPU mining unfeasible again.
*(I wrote a GPU miner for JH-256 coins in a few days with no prior GPU/OpenCL experience. Endianness is a bitch.)
If only there were a dedicated community for every sad sloth, or at least an anagram thereof.
(If you either feel for the sloths, or just appreciate the pun, please send a random amount of slothcoins to SML12GaoebyneT7ctYuj9PFicptetjPUct. Thank you.)
Or if you're into math, you invoke the pigeonhole principle
So the limit of useful compression (Shannon aside) comes down to how well we can model the data. As a simple example, I can give you two 64 bit floats as parameters to a quadratic iterator, and you can fill your latest 6TB HDD with conventionally "incompressible" data as the output. If, however, you know the right model, you can recreate that data with a mere 16 bytes of input. Now extend that to more complex functions - Our entire understanding of "random" means nothing more than "more complex than we know how to model". As another example, the delay between decays in a sample of radioactive material - We currently consider that "random", but someday may discover that god doesn't play dice with the universe, and an entirely deterministic process underlies every blip on the ol' Geiger counter.
IOW, Kolmogorov complexity. For example, tracker and MIDI files are a great way to "compress" music, as they contain the actual notation/composition rather than the resulting sound. Of course, that doesn't account for all the redundancy in instruments/samples.
So while I agree with you technically, for the purposes of a TV show? Lighten up.:)
IMHO, half the fun of such TV shows is exactly in discussions like this -- what it got right, where it went wrong, how could we use the ideas in some real-world innovation. I find that deeper understanding only makes me enjoy things more, not less, and I enjoy "lightening up" my brain cells.
I'm sorry if you missed my point. I agree that USB 3.0 is faster than USB 2.0 — in the same way that PCI Express is faster than PCI. Does that mean PCI has gotten much faster, or is PCIe a new interface that has replaced PCI?
I agree with most of your post, but this is simply false. USB 3.0 is a completely new interface, bolted on USB 1/2 to make it seem like a seamless transition.
I used to think USB is all about selling a new interface with an old name. For example, in a few years we'd have a CPU socket called USB 14.0, but hey, at least it's USB. Now I have a USB 3.0 hard drive, and the mini plug/socket in particular shows how it's just USB 1/2 + 3.0 bolted together. So my new future prediction is USB 17.0 where you have this fist-sized lump of connectors from different ages, all tied into one bunch to ensure backwards compatibility.
BTW, I have two Intel Core CPUs here, Core 2 Duo T7200 (released 2006) and Core i5 520M (2010), both "mobile" CPUs. The former is a lot faster under certain workloads. In practice, they are roughly equal, and the new one probably has better power efficiency, but it's not exactly the level of progress I'd expect.
If you want to use Doge to pay for computers, there's at least Bitelectronics. I have no connection to them except being a happy customer (in the same country though, I can't speak for their international shipping).
I've seen the movie and I've read other works by Niemi. Be careful with the spelling, it's Vittula, where "vittu" means "cunt", and the -la is a suffix for making it a toponym. OTOH, "vitulla" means "on top of a cunt" or "by using a cunt". Also, the original place is called Vittulajänkä, where "jänkä" is a kind of Northern wetland.
The language aspect is interesting, because it takes place in an area of Sweden where they speak Meänkieli, a dialect of Finnish. Swedish authorities consider it a separate language, for the purposes of preserving the special minority status, thus making an interesting case of the language vs. dialect problem.
I don't doubt that Swedish is spoken/understood near the Swedish border on our side, but that probably happens in every border zone around the world. The real Swedish-speaking areas, where many people don't speak Finnish, are found at the coast.
Food in contact with the wall might heat up too quickly and not transfer the heat to rest of the food. Food away from the wall might be undercooked and the food in contact with the wall might char. It is probably suitable for soups and broths. But for cooking rice and such not very liquidy food, heating the wall too rapidly would be a problem.
You have the same problem with any regular pot with too much heat. The point here is to improve efficiency, so you can actually turn down the flame. In addition, it looks like the heat will be more evenly distributed between the bottom and the walls, which would also help avoid burning the food.
The Nordic countries comprise Denmark, Finland, Iceland, Norway and Sweden. Scandinavia is basically your geographic definition; it's not quite clear cut, though, but we mostly care about being Nordic. Finland is the odd one out in terms of linguistic roots, but we share most of our culture with the Nordics -- we were basically a province of Sweden for centuries, and gained independence after a brief stint with Russia.
For some odd reason people elsewhere say "Scandinavian" when they mean "Nordic".
I wonder where you get the part "north Finland speaks partly swedish". There is a vocal Swedish-speaking minority in Finland, but they mostly live on the coast of the Baltic Sea. Might be some Swedish/Norwegian speakers up North, but there you also have the Sami people of Finland, Norway and Sweden mixing up things and blurring the political boundaries.
I trust that my Bermuda grass will just eat up the genes and throw them down into another dimension, just like it did with the countless airplanes and ships back in the day. And don't give me any of that methane and buoyancy theory.
An automatic grenade launcher (aka grenade machine gun) was one of the most awesome/fun things to use back in the day. Having one with self-guided shells would be joygastic.
Slashdot Mirror
Simply by looking at the reactivity series, you can tell that copper is considerably less flammable than iron. OTOH, powdered copper burns with a nice green colour when tossed into a Bunsen flame.
For a practical standpoint, you could ask if steel wool burns in the temperatures of a CPU heatsink. Probably not, and this copper sponge is much less of a risk. Of course, if you like living on the edge, and tweaking CFLAGS is not enough, try an entire case made of a notoriously reactive metal.
basically means that for slower airflow, you need larger gaps for air to flow through. This is why the sponge is bad for heat dissipation, and great for insulation. It's kind of intuitive, but it's nice to have some science backing to it. Having a large surface is good, but it doesn't help if the airflow across the surface is limited.
On a side note, I've been on a quest for quiet cooling since the very early 2000s, incidentally after getting a physics degree. It's mostly in the last couple of years that I've started to see really sensible coolers in the general market. For example, the usual CPU cooler in the olden days had a fan pushing right against the CPU with minimal fins in between, meaning there's a considerable high-pressure centre with no airflow. No one with a fluid mechanics 101 would design crap like that. OTOH, the traditional CPU/mobo setting is a little problematic; first you put the most heat-concentrating element in the middle of everything, and then later you realize it needs cooling. (I'd put the CPU socket on the reverse side and use the case as a huge heatsink...) Now finally the designers have the sense of using a straight sideways airflow, combined with heat pipes. Why the fsck did this take so long?
I used to strive for pure passive cooling, but in the end I don't mind a large, slow fan -- it's enormously better than no fan, and still indistinguishable from other background noises. This is another nice thing to see in cooler designs, from the 1-inch whiner in my first Linux laptop to the 140-mm quiet giants that can easily manage a couple of hundred watts of GPU.
BTW, if you ever need to explain somebody how a heat pipe works, take them to a sauna.
Not only that, they are addicted to DHM. Addiction is bad, mmmkay?
You could ban all of those drugs, and some other drug would become the first one users try.
Would that be causation, or just correlation?
It's a gateway drug!
Pushing this even further --- I have inherited a (mostly empty) 3,000 square foot data center (almost Tier III - but it shares a wall with the outside or so I'm told). I'm using (maybe) two racks.
Are you a Nigerian prince?
Yeah, CPU-only coins last for about 48 hours before a GPU miner is released. As far as crypto-coins the fact is, a modern graphics card is faster than almost anything a CPU can do.
This applies mainly to those that simply choose a semi-standard hash algorithm, such as one of the SHA3 contestants or a combination thereof. Often there is GPU code already available, and building the miner is all about reading some specs and writing some glue code*. Also, most of these coins are based on Bitcoin and simply change the hash algo.
However, most Cryptonote coins (using the Cryptonight algo) have lasted for ages without an open GPU miner. For starters, they are not forked off Bitcoin. Boolberry is a Cryptonote coin with a different algo, which makes it faster to sync, while still aiming for GPU resistance. An open GPU mining codebase was released just a few days ago, and there's still work to do for general distribution. Besides, Boolberry's algorithm needs several MB of fast cache, which is OK with GPU texture cache at the moment, but it will grow over time, possibly making GPU mining unfeasible again.
*(I wrote a GPU miner for JH-256 coins in a few days with no prior GPU/OpenCL experience. Endianness is a bitch.)
The Bitcoin 0.3.0 release article on Slashdot in July 2010 changed my life. For example, by getting me into FPGA and GPU hacking.
If only there were a dedicated community for every sad sloth, or at least an anagram thereof.
(If you either feel for the sloths, or just appreciate the pun, please send a random amount of slothcoins to SML12GaoebyneT7ctYuj9PFicptetjPUct. Thank you.)
Or if you're into math, you invoke the pigeonhole principle So the limit of useful compression (Shannon aside) comes down to how well we can model the data. As a simple example, I can give you two 64 bit floats as parameters to a quadratic iterator, and you can fill your latest 6TB HDD with conventionally "incompressible" data as the output. If, however, you know the right model, you can recreate that data with a mere 16 bytes of input. Now extend that to more complex functions - Our entire understanding of "random" means nothing more than "more complex than we know how to model". As another example, the delay between decays in a sample of radioactive material - We currently consider that "random", but someday may discover that god doesn't play dice with the universe, and an entirely deterministic process underlies every blip on the ol' Geiger counter.
IOW, Kolmogorov complexity. For example, tracker and MIDI files are a great way to "compress" music, as they contain the actual notation/composition rather than the resulting sound. Of course, that doesn't account for all the redundancy in instruments/samples.
So while I agree with you technically, for the purposes of a TV show? Lighten up. :)
IMHO, half the fun of such TV shows is exactly in discussions like this -- what it got right, where it went wrong, how could we use the ideas in some real-world innovation. I find that deeper understanding only makes me enjoy things more, not less, and I enjoy "lightening up" my brain cells.
Or if you're into math, you invoke the pigeonhole principle.
For all intestinal purposes, this thread makes me [sic].
I'm sorry if you missed my point. I agree that USB 3.0 is faster than USB 2.0 — in the same way that PCI Express is faster than PCI. Does that mean PCI has gotten much faster, or is PCIe a new interface that has replaced PCI?
In the past few years, USB has gotten much faster
I agree with most of your post, but this is simply false. USB 3.0 is a completely new interface, bolted on USB 1/2 to make it seem like a seamless transition.
I used to think USB is all about selling a new interface with an old name. For example, in a few years we'd have a CPU socket called USB 14.0, but hey, at least it's USB. Now I have a USB 3.0 hard drive, and the mini plug/socket in particular shows how it's just USB 1/2 + 3.0 bolted together. So my new future prediction is USB 17.0 where you have this fist-sized lump of connectors from different ages, all tied into one bunch to ensure backwards compatibility.
BTW, I have two Intel Core CPUs here, Core 2 Duo T7200 (released 2006) and Core i5 520M (2010), both "mobile" CPUs. The former is a lot faster under certain workloads. In practice, they are roughly equal, and the new one probably has better power efficiency, but it's not exactly the level of progress I'd expect.
I could have let this one slide, but I have a few things to say:
1. Darl, Darl McBride, is that you? When will you be testifying against Mark Shurtleff and John Swallow?
Is that an African or a European Swallow?
If you want to use Doge to pay for computers, there's at least Bitelectronics. I have no connection to them except being a happy customer (in the same country though, I can't speak for their international shipping).
IOW, nobody should use $new_tech until it works everywhere?
Now please send your $50,000 worth of research grant funding to my bitcoin address: FJi2seXY2jf9eYEDoit4ScienCEFiJSfj82jfiffj
You could at least use a real BTC address, in case someone accidentally you some coin. That's not even a Grøstlcoin address (they start with an F).
(By reading the above, you agree to send a random amount of BTC to 1Guy1JarSpEhxb94VYMYRvTMhqbAgdnCtL as a consultation fee. Thank you.)
Apparently, it has been released in Germany, at least the DVD: http://akas.imdb.com/title/tt0...
I've seen the movie and I've read other works by Niemi. Be careful with the spelling, it's Vittula, where "vittu" means "cunt", and the -la is a suffix for making it a toponym. OTOH, "vitulla" means "on top of a cunt" or "by using a cunt". Also, the original place is called Vittulajänkä, where "jänkä" is a kind of Northern wetland.
The language aspect is interesting, because it takes place in an area of Sweden where they speak Meänkieli, a dialect of Finnish. Swedish authorities consider it a separate language, for the purposes of preserving the special minority status, thus making an interesting case of the language vs. dialect problem.
I don't doubt that Swedish is spoken/understood near the Swedish border on our side, but that probably happens in every border zone around the world. The real Swedish-speaking areas, where many people don't speak Finnish, are found at the coast.
Food in contact with the wall might heat up too quickly and not transfer the heat to rest of the food. Food away from the wall might be undercooked and the food in contact with the wall might char. It is probably suitable for soups and broths. But for cooking rice and such not very liquidy food, heating the wall too rapidly would be a problem.
You have the same problem with any regular pot with too much heat. The point here is to improve efficiency, so you can actually turn down the flame. In addition, it looks like the heat will be more evenly distributed between the bottom and the walls, which would also help avoid burning the food.
*sigh*
The Nordic countries comprise Denmark, Finland, Iceland, Norway and Sweden. Scandinavia is basically your geographic definition; it's not quite clear cut, though, but we mostly care about being Nordic. Finland is the odd one out in terms of linguistic roots, but we share most of our culture with the Nordics -- we were basically a province of Sweden for centuries, and gained independence after a brief stint with Russia.
For some odd reason people elsewhere say "Scandinavian" when they mean "Nordic".
I wonder where you get the part "north Finland speaks partly swedish". There is a vocal Swedish-speaking minority in Finland, but they mostly live on the coast of the Baltic Sea. Might be some Swedish/Norwegian speakers up North, but there you also have the Sami people of Finland, Norway and Sweden mixing up things and blurring the political boundaries.
I trust that my Bermuda grass will just eat up the genes and throw them down into another dimension, just like it did with the countless airplanes and ships back in the day. And don't give me any of that methane and buoyancy theory.
Whoever came up with this osmosis thing must have been...
*puts on sunglasses*
An automatic grenade launcher (aka grenade machine gun) was one of the most awesome/fun things to use back in the day. Having one with self-guided shells would be joygastic.