Sorry for replying twice, but I forgot to point out this: there are two possible applications for strong magnetic fields in a HDD factory: one is to "bake" those nasty rare-earth magnets (I haven't the faintest idea how they're made), and that would surely be a DC field (harmless),
Although you can magnetize a rare-earth magnet with a DC field, it's not the standard method. Normally you charge a bank of capacitors up to a few hundred volts and then discharge them through a coil wound around the material to be magnetized. This creates a pulsed magnetic field with a high peak intensity, which is what you need to magnetize the rare earth material. The current is high enough that the coil would melt if it had to carry the current continuously, but because it's only a short pulse there is enough time to dissipate the heat before the next cycle.
I'm not sure if its your computer doing the 6to4 tunneling or your airport. I'm thinking it's the computer as its using the 2002 address as opposed to the router doing it all in the background.
The tunnel is established by the airport; I'm not running any 6to4 stuff on the LAN computers (Macbook, couple of Linux boxes, and an OpenBSD instance running in a KVM virtual machine). They just auto-configure themselves on the/64 announced by the router. The LAN computers can 'ping6' each other as well as external sites like ipv6.google.com.
$ host ipv6.google.com ipv6.google.com is an alias for ipv6.l.google.com. ipv6.l.google.com has IPv6 address 2001:4860:800b::93 ipv6.l.google.com has IPv6 address 2001:4860:800b::63 ipv6.l.google.com has IPv6 address 2001:4860:800b::67 ipv6.l.google.com has IPv6 address 2001:4860:800b::68 ipv6.l.google.com has IPv6 address 2001:4860:800b::69 ipv6.l.google.com has IPv6 address 2001:4860:800b::6a
If you actually try to connect to 208.67.219.132 you end up at "hit-nxdomain.opendns.com" so it looks like there are some DNS shenanigans going on at your end.
In any event, you can't get to the actual Google website with its "bouncy" logo unless you do so over IPv6.
$ ping6 ipv6.comcast.net PING6(56=40+8+8 bytes) 2002:1159:44ef::226:48ff:fe12:a9a7 --> 2001:558:1002:5:68:87:64:59 16 bytes from 2001:558:1002:5:68:87:64:59, icmp_seq=0 hlim=52 time=235.216 ms 16 bytes from 2001:558:1002:5:68:87:64:59, icmp_seq=1 hlim=52 time=245.426 ms
This is through an Apple airport base station via whatever tunnel provider it uses for its IPv6 support. No manual setup, just click the buttons to turn IPv6 on and to block incoming connections.
Mission accomplished. I got this on the second link that I clicked.
We are currently unable to serve your request We apologize, but an error occurred and your request could not be completed. This error has been logged. If you have additional information that you believe may have caused this error please report the problem here.
1985-1995 were the years of the Amiga Desktop. (not that Win95 was better in any way, [...]
It's worth noting that many of the big features of Windows 95 such as:
- Preemptive multitasking
- 32-bit support
- Long filenames
- "Plug & Play" expansion cards had already been present in the Amiga OS since 1985.
So can I add this the list of possible humanity-ending catalysts and/or future Michael Crichton novel plotlines?
The one I'm waiting for is a genetically-engineered cellulose-to-ethanol bacterium that can survive in the wild. With all of the biofuel companies rushing to come up with a commercially-viable product, there's lots of opportunity for an accident to unleash a critter capable of eating all plant life on earth. It will doom humanity, but at least we'll have lots of cheap booze to drink as the planet withers and dies.
For this very reason I hate mandatory seatbelt laws, if there's the possibility someone will burn to death they should have the choice as to whether or not they will wear a seatbelt.
If you don't wear a seatbelt, you may suffer additional injuries that prevent you from escaping a burning car. You will also be worse off in any accident that does not involve a car fire. A much better solution is to wear your damn seatbelt and carry one of these in the car.
There's a bit of a confusion of terms here - nuclear reactors do have some degree of a size restriction, but neither the Pioneer or Voyager programs used nuclear reactors as their power source.
The Soviet Cosmos satellites used true nuclear reactors.
Three points to consider: - It's openmoko based, so it's extremely hackable.
[citation needed]
It's produced by some of the Openmoko people but it's a very different software stack that shares little (if any) code with their phones. It doesn't run Linux.
Source code is available (seems to be at http://code.google.com/p/wikipediardware/) so there is some potential for hacking and community development, but so far I haven't thought of any interesting applications except for an e-book reader. It doesn't have any of the interesting peripherals that come with the Freerunner (WiFi, GPS, accelerometer, USB, etc).
I do appreciate the AAA batteries and the sunlight-readable screen. Those are the reason that I'm still using my Palm III to read science-fiction magazines.
Since Kelvin is indicated just by the K, no degree sign, there should be no need to post the degree sign. "Degrees Kelvin" is a misunderstanding of the system of units.
To be even more pedantic, SI unit names are not capitalized even if they are derived from a person's name. The unit is "kelvin" and the symbol is "K".
What do we do with all the nuclear waste produced from fission?
Reprocess it to extract fuel that can be re-used in other power plants (e.g. CANDU reactors can run on the waste from a light-water reactor). Extract other elements where commercially viable (e.g. rare and expensive stuff like rhodium). Vitrify the leftovers and then store them in abandoned uranium mines (which were already filled with radioactive rocks before humans came along).
Maybe it's going to be a pop-up book? Pull the slider, see the alt text?
When I was a kid, there were puzzle books that used invisible ink and a special highlighter pen that made it visible. [googles] Like this. I'm sure it would add a lot to the cost, but it would be the perfect way to do web-comic "alt text" in a printed book.
Um, excuse me. I have to go file a patent application...
I've been thinking about ways to utilize human urine for energy for a while now... you can make very powerful high explosives out of it,
Well, with the help of some bacteria you can convert it into nitrates. There is some stored energy but I doubt if there's enough to be useful as a fuel. You're probably better off using it as fertilizer for some crop that you can turn into ethanol or similar. Urine (well, urea) can also be used to reduce NOx emissions from diesel engines (google "urea SCR").
You may also be interested in this PDF about efficient conversion of urine into fertilizer. It involves some neat chemical tricks like adding magnesium to precipitate phosphate and ammonium ions in a useful form.
Sort of. As I remember it, it could be switched between 1 and 2 MHz but if you went to 2 MHz you lost the 40-column (composite) video output. This is because at 1 MHz the CPU and the graphics chip accessed RAM on alternating bus cycles. At 2 MHz the CPU had exclusive access to the RAM. You could still get 80-column (RGBI) video output because that was handled by a different chip.
I realize we, as in all space agencies, use helium or something else to keep these instruments cold, but why can't we use the coldness of space to do the same thing?
According to this PDF the Planck mission does not use liquid helium coolant (although Herschel does). Also the upcoming James Webb telescope will not use it.
For each unit of heat energy, the maximum amount of work (useful energy extracted) is (1 - Tc/Th), where Tc and Th are the temperatures of the cold and hot side of the process.
Slashdot Mirror
Sorry for replying twice, but I forgot to point out this: there are two possible applications for strong magnetic fields in a HDD factory: one is to "bake" those nasty rare-earth magnets (I haven't the faintest idea how they're made), and that would surely be a DC field (harmless),
Although you can magnetize a rare-earth magnet with a DC field, it's not the standard method. Normally you charge a bank of capacitors up to a few hundred volts and then discharge them through a coil wound around the material to be magnetized. This creates a pulsed magnetic field with a high peak intensity, which is what you need to magnetize the rare earth material. The current is high enough that the coil would melt if it had to carry the current continuously, but because it's only a short pulse there is enough time to dissipate the heat before the next cycle.
I'm not sure if its your computer doing the 6to4 tunneling or your airport. I'm thinking it's the computer as its using the 2002 address as opposed to the router doing it all in the background.
The tunnel is established by the airport; I'm not running any 6to4 stuff on the LAN computers (Macbook, couple of Linux boxes, and an OpenBSD instance running in a KVM virtual machine). They just auto-configure themselves on the /64 announced by the router. The LAN computers can 'ping6' each other as well as external sites like ipv6.google.com.
Last I heard was lithium was a precious metal--and 50% of the world's sources were in one country (So Am).
Also, last I heard was precious meant expensive and rare...
Some quick googling suggests a price around $6000 per ton of lithium carbonate, which would contain about 100 kg of lithium. So call it $60 per kg.
I would consider silver to be the entry-level "precious" metal. It's currently trading around $17 per troy oz, or about $550 per kg.
Therefore your girlfriend won't be very impressed when you give her that lithium engagement ring.
ipv6.l.google.com has address 208.67.219.132
Not from here:
$ host ipv6.google.com
ipv6.google.com is an alias for ipv6.l.google.com.
ipv6.l.google.com has IPv6 address 2001:4860:800b::93
ipv6.l.google.com has IPv6 address 2001:4860:800b::63
ipv6.l.google.com has IPv6 address 2001:4860:800b::67
ipv6.l.google.com has IPv6 address 2001:4860:800b::68
ipv6.l.google.com has IPv6 address 2001:4860:800b::69
ipv6.l.google.com has IPv6 address 2001:4860:800b::6a
If you actually try to connect to 208.67.219.132 you end up at "hit-nxdomain.opendns.com" so it looks like there are some DNS shenanigans going on at your end.
In any event, you can't get to the actual Google website with its "bouncy" logo unless you do so over IPv6.
Pinging ipv6.comcast.net [68.87.64.59]
It works for me.
$ ping6 ipv6.comcast.net
PING6(56=40+8+8 bytes) 2002:1159:44ef::226:48ff:fe12:a9a7 --> 2001:558:1002:5:68:87:64:59
16 bytes from 2001:558:1002:5:68:87:64:59, icmp_seq=0 hlim=52 time=235.216 ms
16 bytes from 2001:558:1002:5:68:87:64:59, icmp_seq=1 hlim=52 time=245.426 ms
This is through an Apple airport base station via whatever tunnel provider it uses for its IPv6 support. No manual setup, just click the buttons to turn IPv6 on and to block incoming connections.
I always loved the pause in JFK's original speech:
We choose to go to the moon. We choose to go to the moon..
and do the other things.. (?)
That's nothing compared to Neil Armstrong's pause when he realizes that he just blew his big line.
That's one small step for man, one [damnit! "a man". It makes no sense otherwise. Oh well.] giant leap for mankind.
Mission accomplished. I got this on the second link that I clicked.
We are currently unable to serve your request
We apologize, but an error occurred and your request could not be completed.
This error has been logged. If you have additional information that you believe may have caused this error please report the problem here.
1985-1995 were the years of the Amiga Desktop.
(not that Win95 was better in any way, [...]
It's worth noting that many of the big features of Windows 95 such as:
- Preemptive multitasking
- 32-bit support
- Long filenames
- "Plug & Play" expansion cards
had already been present in the Amiga OS since 1985.
So can I add this the list of possible humanity-ending catalysts and/or future Michael Crichton novel plotlines?
The one I'm waiting for is a genetically-engineered cellulose-to-ethanol bacterium that can survive in the wild. With all of the biofuel companies rushing to come up with a commercially-viable product, there's lots of opportunity for an accident to unleash a critter capable of eating all plant life on earth. It will doom humanity, but at least we'll have lots of cheap booze to drink as the planet withers and dies.
>Grapefruit interacts with many drugs - it can make many drugs way more effective than expected.
Please elaborate. Please!
http://en.wikipedia.org/wiki/List_of_drugs_affected_by_grapefruit
For this very reason I hate mandatory seatbelt laws, if there's the possibility someone will burn to death they should have the choice as to whether or not they will wear a seatbelt.
If you don't wear a seatbelt, you may suffer additional injuries that prevent you from escaping a burning car. You will also be worse off in any accident that does not involve a car fire. A much better solution is to wear your damn seatbelt and carry one of these in the car.
There's a bit of a confusion of terms here - nuclear reactors do have some degree of a size restriction, but neither the Pioneer or Voyager programs used nuclear reactors as their power source.
The Soviet Cosmos satellites used true nuclear reactors.
For anyone still following this story, the actual location of the source code is git://github.com/wikireader/wikireader.git .
Three points to consider:
- It's openmoko based, so it's extremely hackable.
[citation needed]
It's produced by some of the Openmoko people but it's a very different software stack that shares little (if any) code with their phones. It doesn't run Linux.
Source code is available (seems to be at http://code.google.com/p/wikipediardware/) so there is some potential for hacking and community development, but so far I haven't thought of any interesting applications except for an e-book reader. It doesn't have any of the interesting peripherals that come with the Freerunner (WiFi, GPS, accelerometer, USB, etc).
I do appreciate the AAA batteries and the sunlight-readable screen. Those are the reason that I'm still using my Palm III to read science-fiction magazines.
Since Kelvin is indicated just by the K, no degree sign, there should be no need to post the degree sign. "Degrees Kelvin" is a misunderstanding of the system of units.
To be even more pedantic, SI unit names are not capitalized even if they are derived from a person's name. The unit is "kelvin" and the symbol is "K".
What do we do with all the nuclear waste produced from fission?
Reprocess it to extract fuel that can be re-used in other power plants (e.g. CANDU reactors can run on the waste from a light-water reactor). Extract other elements where commercially viable (e.g. rare and expensive stuff like rhodium). Vitrify the leftovers and then store them in abandoned uranium mines (which were already filled with radioactive rocks before humans came along).
Maybe it's going to be a pop-up book? Pull the slider, see the alt text?
When I was a kid, there were puzzle books that used invisible ink and a special highlighter pen that made it visible. [googles] Like this. I'm sure it would add a lot to the cost, but it would be the perfect way to do web-comic "alt text" in a printed book.
Um, excuse me. I have to go file a patent application...
I recall reading (back in the 80s) that NASA had payload space reserved for simple experiments that were attached to the sides of the payload bay.
That was the Getaway Special program.
I've been thinking about ways to utilize human urine for energy for a while now... you can make very powerful high explosives out of it,
Well, with the help of some bacteria you can convert it into nitrates. There is some stored energy but I doubt if there's enough to be useful as a fuel. You're probably better off using it as fertilizer for some crop that you can turn into ethanol or similar. Urine (well, urea) can also be used to reduce NOx emissions from diesel engines (google "urea SCR").
You may also be interested in this PDF about efficient conversion of urine into fertilizer. It involves some neat chemical tricks like adding magnesium to precipitate phosphate and ammonium ions in a useful form.
(Wow, I was going to pick on 'dammit', and at least dictionary.com lists it.)
What's wrong with that? "Dammit" is a cromulent word.
Still you should see the caesium air battery I built, heavy as a brick and explodes first hint of damp weather.
You actually get less 'boom' out of caesium than some of the lighter elements, as Theodore Gray demonstrated.
Finally C128 had 2MHz
Sort of. As I remember it, it could be switched between 1 and 2 MHz but if you went to 2 MHz you lost the 40-column (composite) video output. This is because at 1 MHz the CPU and the graphics chip accessed RAM on alternating bus cycles. At 2 MHz the CPU had exclusive access to the RAM. You could still get 80-column (RGBI) video output because that was handled by a different chip.
I realize we, as in all space agencies, use helium or something else to keep these instruments cold, but why can't we use the coldness of space to do the same thing?
According to this PDF the Planck mission does not use liquid helium coolant (although Herschel does). Also the upcoming James Webb telescope will not use it.
There's a free (beer) spaceflight simulator available at http://orbit.medphys.ucl.ac.uk/orbit.html that lets you try these sorts of approaches.
How much energy can you actually reclaim from a given amount of heat? Is it a constant fraction, if so where does that number come from?
http://en.wikipedia.org/wiki/Carnot_cycle
For each unit of heat energy, the maximum amount of work (useful energy extracted) is (1 - Tc/Th), where Tc and Th are the temperatures of the cold and hot side of the process.