A fair accounting of RFK, who I idolized, should probably include some details from Seymour Hersh's book re Camelot. Lotta very surprising things about RFK in there. *Probably* more legit than that other scurrilous info in the OP.
Emmm, we can't even terraform Earth to mitigate global warming, how likely we'll be able to do a much bigger job on MArs, without say the convenience of energy, air, equipment, labor, or the urge to do so?
It all comes down to the laws of scaling, first discovered by Galileo.
The amount of heat generated by anything goes up as the volume, but the ability to dissipate heat only goes up as the square. Which means you can only make heat-generating things up to a certain size vefore they require cooling.
That's why internal-combustion cylinders can only be made so big-- somewhere around 3-4 liters each there's too much heat generated to be carried away by the limited wall space.
Same thing with power supplies-- you can nowdays build them to generate lots of watts per cubic inch, but then getting rid of the heat is a problem.
In a floor-mount power supply you really can't use a fan-- it would get clogged up very quickly by your house dust and cat hairs. They could have used an extruded aluminum case with heat-sink fins on it, but that would have added a couple dollars to the cost. Plus requiring a three-wire line cord and extra certificationh.
So they went with some marginal convection cooling vents and a lot of finger-crossing.
Not too surprising if they were the same floks that designed the old xbox power supply, with its bound-to-break power connector.
Let's say you're Intel's fab facility and you've just had a really good run of wafers. The recipes for deposition, diffusion, metalization ran *just* right. When you run the CPU's through the test phase, 95% of the CPU's test out at 3.4 GHz! Profit! Bonus time!
But the sales department comes to you with a sad face. You made 85,000 3.4 GHz CPU's, but they have orders for only 1,000 of those, the rest of the orders are for 2GHz chips.
Guess what they tell you to do?: Run out to the asemmbly line and quickly push the buttons to label and blow the chip fuses so they advertise themselves as the lower speed grade. Seems like a waste, but it keeps the customers and accountants happy.
Happens all the time. I recently bought a batch of "300 volt" transistors. On the tester they all measured out at 650 to 670 volts.
So there's a *slight* chance these guys have a batch of underlabeled CPU's.
> Why would I need a solder-sucker?
Cuz if you don't remove the solder in the holes, you can't slip the new cap into place in one operation-- you have to joggle it into place 1/4 inch at a time, jockeying your iron between the pads. Unless you have an iron with a honkin-wide tip that can heat both the pads adequately at the same time. And solder-suckers are such cool technology. I've had best luck with those blue anodized metal tubular ones, less luck with the turkey-baster nee/artificial-insemination kind.
Well, we agree on the need for "good technique".
My "20 seconds" included having to do everything two or three times, as quite often you can't rock a capacitor lead all the way out of a hole in one try. Maybe halfway, then often you run out of rocking roo m. Then you have to go rock the other lead, then come back to the first one. That's only 5 seconds per lead.
In my experience, about 30+ years of it, a 20-30 watt iron is perfect for most printed circuit board soldering. But the power supply capacitors are always on very heat-hungry vias-- two or more wide copper layers taking away heat like crazy. Just last month I tried a 20-watt iron on a video board. It got exactly nowhere in melting one ground via that must have gone to all four layers.
You have successfully removed capacitors from a board before.
You have the right tools:
A fine-point soldering iron, 47 to 150 watts. NOT your typical 20-watt pencil iron.
A solder-sucker.
Known good capacitors:
Not from Rat-Shack.
Not salvaged from a dead car stereo
Same uF.
Save Volts
Rated for HIGH RIPPLE CURRENT.
Rated for 85 or 105 degrees C.
(Best bet is to order them from Digi-Key, they list the full specs.)
A grounding strap for your body and soldering iron.
Willing to take the 25% risk of killing the mobo anyway.
The reason for all these cautions is that mobo power supply capacitors are highly stressed-- those square black FETs are hitting the caps with 30-amp pulses about 200,000 times a second! Your basic Radio-Shack 49 cent capacitor can't handle this kind of stress.
You also need a big honkin' soldering iron as each of those capacitor leads are soldered to many layers of copper foil, which make excellent heat sinks. It takes 50 to 100 watts of heat to heat up all those layers in an expeditious fashion.
I would first practice this art on an old scrapped motherboard. A true geek always has a few of these around. Practice your unsoldering technique until you can get a capacitor off (no jokes pls) in 20 seconds with no damage to the board.
Don't ask me how I learned all the things not to do.
It's really unlikely that 2^64 addresses might get used up.
IIRC 2^32 is a bit over 4 billion. Going to 64-bit IP addresses multiplies that by another 4 billion.
Roughly speaking, our current scheme is enough to give everybody over the age of 12 their own IP address. Going to 64-bit addresses gives EVERYBODY their own block of 4 billion IP addresses. This is probably enough for even most geeky of Slashdot readers.
The study seems to be fatally flawed. They didnt build an antenna into a dummy's head, but instead somehow placed an "antenna" on a subject's head. In a word or two: totally bogus.
With that arrangement you're going to get very strange and impossible readings. Just like they got: a 100x amplification. There's no way a symettrical ring of foil, Aluminum, Tin, or Gadolidium can focus Em waves by a factor of 100.
So we have a bogus experiment of a bogus concept. Do two B's make a right?
Uh, no. The universe has around 10^85 atoms (plus or minus a few orders).
2^128 is approximately 10^38. A much smaller number. About 10^63 times smaller.
You can only assign IP addresses to each atom in New Jersey.
Lesse, on the one side we have one guy, with probably less than six digits to spend fighting lawsuits.
On the other hand, MS probably has a couple floors full of lawyers with nothing else to do. They could send planefuls of them, to sue the poor guy in disparate jurisdictions and countries.
Given that scenario, is there any doubt who's gonna win, never mind the facts?
Why a pipe? Why are you entombing the pipe in concrete and lead? How are you getting a potential difference from a static gravitational field? That's perpetual-motion talk.
Do you know how small 4,000 picovolts are? That's 0.004 of a millionth of a volt. The thermal noise voltage of that pipe in a 100Hz bandwidth is going to be about 100,000 times greater than that. The thermoelectric effect about 10,000 times that.
What about the wire going back up from the bottom of the pipe to the voltmeter? Isnt that going to gfenerate about the same voltage, opposite polarity, so there's no difference left at the top?
The speed of gravity is the same as the speed of light.
You're not going to get much thruput with gravity waves, as generating them requires you wiggle something big. And big things have a *lot* of inertia. You'd be lucky to keep up with smoke signals.
There are about two billion pistons wiggling up and down at any one time on this planet. That's quite a bit of background noise. How's your satellite going to compete with every wiggling thing?.
Not new, there have been attempts to do this for at least 35 years. Detecting gravity waves is really hard. Gravity is close to 10^40 times weaker than electromagnetic attraction. So any detector you build has to be like REALLY stable against electromagnetic effects. Even then the predicted sensitivity to gravity is soooo loooow it requires you to hope for neutron starts hitting head on, or other such huge gravity wave generators. Even then, an ant walking by at 100 meters is likely to snafu the data.
My hat's off to anybody in this business, they must have a lot of time and money and patience!
it's unlikely a computer room is going to get "too small" unless your company is growing at an astounding rate. Moore's law has been making computers smaller and faster and more power-efficient by several db per year.
More likely the powers that be have overbought capacity, in order to expand the apparent size and importance of their empire. I've seen several computer rooms that could have been replaced with three laptops and a pocket fan.
What's really going on is that most games in the past have been tuned for the rather limited dynamic range of CRT's. A CRT can't do much more than a 30-1 range without saturating the phosphors.
But the newer and better LCD displays can do around TEN times better. So it's time to turn up the contrast.
Nothing much more high-tech than that.
Re:FOUR, er FIVE symlink styles, all kinda *wrong*
on
Vista To Get Symlinks?
·
· Score: 1
"As a practical matter, it doesn't seem to be a huge problem."
Depends what you're doing, and how picky you are.
If you're trying to index a whole file system. it's a huge pain to have two files with different names but pointing to the same data. Or a file that is actually a remote filesystem, which may or may not be available, may be 1000 times slower than the rest of the files.
Or if you're trying to write yet another smart backup program and don't want to backup multiple copies of the 44GB database, just because different users have different shortcuts or mounts or aliases or substs to the same data.
Or if you're trying to write a virus checker....
Regards,
A_H
Slashdot Mirror
MAIL FROM: xxxx
RCPT TO: yyy
DATA
The msg
.
QUIT
What more does one need?
A fair accounting of RFK, who I idolized, should probably include some details from Seymour Hersh's book re Camelot. Lotta very surprising things about RFK in there. *Probably* more legit than that other scurrilous info in the OP.
- If the car doesnt start, they might pay on time, instead of waiting for a few harassing phone calls and threats of reposession.
- With timely payments, the seller might not have to pay repo agencies for phonecalls and visits in the night.
- With a bit lower costs, the seller just might be able to pass a bit of the savings to the consumer.
Slightly optimistic, but it might just happen.Emmm, we can't even terraform Earth to mitigate global warming, how likely we'll be able to do a much bigger job on MArs, without say the convenience of energy, air, equipment, labor, or the urge to do so?
It's been in the works for over a decade now, with no deployment in sight.
The amount of heat generated by anything goes up as the volume, but the ability to dissipate heat only goes up as the square. Which means you can only make heat-generating things up to a certain size vefore they require cooling.
That's why internal-combustion cylinders can only be made so big-- somewhere around 3-4 liters each there's too much heat generated to be carried away by the limited wall space.
Same thing with power supplies-- you can nowdays build them to generate lots of watts per cubic inch, but then getting rid of the heat is a problem.
In a floor-mount power supply you really can't use a fan-- it would get clogged up very quickly by your house dust and cat hairs. They could have used an extruded aluminum case with heat-sink fins on it, but that would have added a couple dollars to the cost. Plus requiring a three-wire line cord and extra certificationh.
So they went with some marginal convection cooling vents and a lot of finger-crossing.
Not too surprising if they were the same floks that designed the old xbox power supply, with its bound-to-break power connector.
As others have noted, this microwave heater is a really terrible idea, for many reasons:
- Your basic $69.95 resistance heater does the job with 99%+ efficiency.
- A microwave heater is going to be at best 60% efficient.
- A 20KW magnetron is going to cost serious money!
- A 20KW power transformer is $$$ and heavy too!
- Many houses don't have the extra 40% power available to waste.
Silly, counterproductive, expensive, ridiculously bad idea. Scotty would cry.But the sales department comes to you with a sad face. You made 85,000 3.4 GHz CPU's, but they have orders for only 1,000 of those, the rest of the orders are for 2GHz chips.
Guess what they tell you to do?: Run out to the asemmbly line and quickly push the buttons to label and blow the chip fuses so they advertise themselves as the lower speed grade. Seems like a waste, but it keeps the customers and accountants happy.
Happens all the time. I recently bought a batch of "300 volt" transistors. On the tester they all measured out at 650 to 670 volts.
So there's a *slight* chance these guys have a batch of underlabeled CPU's.
> Why would I need a solder-sucker? Cuz if you don't remove the solder in the holes, you can't slip the new cap into place in one operation-- you have to joggle it into place 1/4 inch at a time, jockeying your iron between the pads. Unless you have an iron with a honkin-wide tip that can heat both the pads adequately at the same time. And solder-suckers are such cool technology. I've had best luck with those blue anodized metal tubular ones, less luck with the turkey-baster nee/artificial-insemination kind.
Well, we agree on the need for "good technique". My "20 seconds" included having to do everything two or three times, as quite often you can't rock a capacitor lead all the way out of a hole in one try. Maybe halfway, then often you run out of rocking roo m. Then you have to go rock the other lead, then come back to the first one. That's only 5 seconds per lead. In my experience, about 30+ years of it, a 20-30 watt iron is perfect for most printed circuit board soldering. But the power supply capacitors are always on very heat-hungry vias-- two or more wide copper layers taking away heat like crazy. Just last month I tried a 20-watt iron on a video board. It got exactly nowhere in melting one ground via that must have gone to all four layers.
- You're really sure you have bad capacitors.
- You have successfully removed capacitors from a board before.
- You have the right tools:
- A fine-point soldering iron, 47 to 150 watts. NOT your typical 20-watt pencil iron.
- A solder-sucker.
- Known good capacitors:
- Not from Rat-Shack.
- Not salvaged from a dead car stereo
- Same uF.
- Save Volts
- Rated for HIGH RIPPLE CURRENT.
- Rated for 85 or 105 degrees C.
- A grounding strap for your body and soldering iron.
- Willing to take the 25% risk of killing the mobo anyway.
The reason for all these cautions is that mobo power supply capacitors are highly stressed-- those square black FETs are hitting the caps with 30-amp pulses about 200,000 times a second! Your basic Radio-Shack 49 cent capacitor can't handle this kind of stress.(Best bet is to order them from Digi-Key, they list the full specs.)
You also need a big honkin' soldering iron as each of those capacitor leads are soldered to many layers of copper foil, which make excellent heat sinks. It takes 50 to 100 watts of heat to heat up all those layers in an expeditious fashion.
I would first practice this art on an old scrapped motherboard. A true geek always has a few of these around. Practice your unsoldering technique until you can get a capacitor off (no jokes pls) in 20 seconds with no damage to the board.
Don't ask me how I learned all the things not to do.
Anybody want to buy a few "as-is" mobos?
It's really unlikely that 2^64 addresses might get used up. IIRC 2^32 is a bit over 4 billion. Going to 64-bit IP addresses multiplies that by another 4 billion. Roughly speaking, our current scheme is enough to give everybody over the age of 12 their own IP address. Going to 64-bit addresses gives EVERYBODY their own block of 4 billion IP addresses. This is probably enough for even most geeky of Slashdot readers.
With that arrangement you're going to get very strange and impossible readings. Just like they got: a 100x amplification. There's no way a symettrical ring of foil, Aluminum, Tin, or Gadolidium can focus Em waves by a factor of 100.
So we have a bogus experiment of a bogus concept. Do two B's make a right?
Uh, no. The universe has around 10^85 atoms (plus or minus a few orders). 2^128 is approximately 10^38. A much smaller number. About 10^63 times smaller. You can only assign IP addresses to each atom in New Jersey.
On the other hand, MS probably has a couple floors full of lawyers with nothing else to do. They could send planefuls of them, to sue the poor guy in disparate jurisdictions and countries.
Given that scenario, is there any doubt who's gonna win, never mind the facts?
How are you getting a potential difference from a static gravitational field? That's perpetual-motion talk.
What about the wire going back up from the bottom of the pipe to the voltmeter? Isnt that going to gfenerate about the same voltage, opposite polarity, so there's no difference left at the top?
My hat's off to anybody in this business, they must have a lot of time and money and patience!
But if you get real you might want to do a few things differently:
More likely the powers that be have overbought capacity, in order to expand the apparent size and importance of their empire. I've seen several computer rooms that could have been replaced with three laptops and a pocket fan.
Not even close.
It's called "turning up the contrast".
What's really going on is that most games in the past have been tuned for the rather limited dynamic range of CRT's. A CRT can't do much more than a 30-1 range without saturating the phosphors.
But the newer and better LCD displays can do around TEN times better. So it's time to turn up the contrast.
Nothing much more high-tech than that.
Depends what you're doing, and how picky you are.
If you're trying to index a whole file system. it's a huge pain to have two files with different names but pointing to the same data. Or a file that is actually a remote filesystem, which may or may not be available, may be 1000 times slower than the rest of the files.
Or if you're trying to write yet another smart backup program and don't want to backup multiple copies of the 44GB database, just because different users have different shortcuts or mounts or aliases or substs to the same data.
Or if you're trying to write a virus checker.... Regards, A_H