"In this case, a property owner has the option of paying, but also has the option of simply waiting, and the graffiti will clean itself up."
Yeah, because nobody in the Yukon lives anywhere near the US border!
(Yeah yeah, I know they can't get it consistently either, but forget complaints about US-centrism: most people on/. think there's nothing more than the 48 contiguous!)
"I've never seen "USB" as an option in the "A, C, CDROM"
You young whipper-snappers with your "CD-ROM boot" and your "network boot" are all a bunch of sissies and don't know it! Why, back in my day you were given one option: floppy drive! Hard drives were too expensive and required a team of oxen to get the durned things spinning, so everything was on a truckload of floppy disks.
And when I say floppy, I mean floppy! Those things were flopper than you were when you walked in on your grandmother and I this morning! Have you ever tried putting a pancake into a disk drive?
Them rich snots down the street, they had one of them new-fangled "double density" drive. Managed to get PC-DOS down to less than half a dozen disks (unless you included GW-BASIC!). Us, we were stuck with single sided, single density. Do you have any idea how many of those it takes to fit just one Library of Congress on? Station wagons full!
"Network boot..." bah! We had a network! It didn't just look like a garden hose, it was a garden hose! We'd roll one of our floppy disks up and shove it in and blow it on through to our friends in order to share our music files!
You ever hear Asia being played by your internal speaker, boy?
"Stress test" to me sounds like "Let's see what happens when everybody is on at the same time." It's easie for that to happen if everybody lives relatively close to each other longitude-wise.
Let me just say, while typing on my original MS natural keyboard, sitting next to my original MS Sidewinder game pad... ppbbbbpbpbbttt!!
Could be worse, though... they could be making networking hardware again...
Re:Sounds perfect for Florida...
on
Space-Age Houses
·
· Score: 1
"If you take your typical airfoil, you'll find that there is a lift vector perpendicular to the airflow."
Only if that airfoil has a positve angle of attack, providing the air something to strike against and be pushed downward by. This is why fan blades are angled.
"whereas if you where to measure the air pressure at the top of the airfoil, you'll only measure the static pressure (which is less than the total)"
"but since the airflow is slower below the wing than above it, it will be a higher pressure than above the wing due to the lower dynamic pressure"
In the first paragraph, you have:
(static) + (dynamic1) > (static)
In the second, you have:
(static) + (dynamic2) < (static) + (dynamic1)
Cancelling, we have
(dynamic2) < (dynamic1)
And yet in the second paragraph you also specify that
(dynamic2) > (dynamic1)
Where'd the negation sign come from?
Dynamic pressure below the wing after impact with the bottom of the wing is lower than dynamic pressure above. This is because the air strikes against the bottom of the wing and there is a transfer of momentum from the air to the wing. The air lost momentum without losing mass, so it's moving more slowly, creating less dynamic pressure.
You're confusing cause and effect. The wing isn't pushed up because the air is moving slower, the air is moving slower because the wing is being pushed up.
Re:Sounds perfect for Florida...
on
Space-Age Houses
·
· Score: 1
"Air moving under the roof will create negative lift by reducing the static pressure below it."
The only things that can reduce static pressure is a reduction in the number of air molecules or a reduction in temperature. This is where Bernoulli comes in.
If you were able to achieve laminar flow under your roof, static pressure under the roof would be exactly the same as static pressure on the leeward side of your roof, no matter what the windspeeds. It would also be the same on the windward side of the roof. There is a dynamic pressure on the windward side of the house from the wind pushing on it, but that is acting paralell to the direction of the wind, attempting to push the roof laterally, not upward.
"Wings work by forcing air to move over them faster than below them not the other way around."
No, wings work mostly by pushing air down, as explained in the Wikipedia article I referenced in my last reply to you. Bernoulli helps to explain why wings are more effective at pushing air downward than one would expect (because the wing also directs air moving over it downard), but Bernoulli alone cannot explain lift.
"The equation for dynamic pressure is.5 * density_air * velocity^2 * area. "
There are a grocery list of things wrong with that statement, but the one most hindering your understanding is that you're forgetting that velocity is a vector. Unless some other vector manages to find its way into that equation, dynamic pressure can only act in the direction the air is moving.
" Total pressure is equal to the dynamic pressure + static pressure."
Only in the direction of airflow. Otherwise you need to invoke trigonometry to find that component of the wind vector acting tangentially to the surface.
Static pressure is different from dynamic pressure in that it is the same reguardless of direction; molecules are moving in all directions and, because of mass/energy conservation, they impact all sides of a container/surface/etc. equally, cancelling each other out.
"but the static pressure (that measured by a barometer) is substantially different if the winds outside the house are strong (which is why windows blow out, not in)."
This is true, but only in the case of a tornado, and only on the leeward side of the house.
"Only in a tornado" because tornados are very small and very fast. With large storm systems (like a hurricane), static air pressure changes gradually over time (in terms of centimeters of mercury per hour), giving enough time for the static air pressure within the house to gradually meet it. With a tornado, the change in static pressure around the house can happen as quickly as with a bomb. The static pressure around the house drops too quickly for the air inside the house to catch up, resulting in a net pressure on the leeward windows outwards.
"Only on the leeward side" because of the effects of dynamic pressure. In the absence of winds, with just the change in static pressure, all the windows of the house would blow out. However, on the windward side of the house there is also the dynamic pressure from the winds trying to push those windows in, a high enough dynamic pressure to cancel out the low static pressure and then some(!). The net pressure difference in that case is inward.
The reading from the barometer you mentioned will depend solely on how close it is to the tornado, not what direction the winds are moving or how fast they are going.
"By opening the windows/doors of the house, you are lowering the static pressure in your house, thus helping keep the roof on it (at the cost of letting the storm in the house, of course)."
As mentioned in my previous post, opening all your windows will cause a turbulent airflow through your house, with some air molecules being deflected upwards to tear your roof off.
Re:Sounds perfect for Florida...
on
Space-Age Houses
·
· Score: 1
"Lift occurs when you have a high-velocity fluid moving above an object while a lower velocity fluid is moving below the object."
No, lift occurs when air pushes something up. From the sounds of things, it looks like you're hung up on the classic "bad science" definition of lift. Wikipedia has an article here that explains lift in a way that doesn't give Bernoulli more credit than he's due.
"In the case of a roof in a hurricane, there can be over 200kph winds above with 0kph below resulting in tremendous lift."
Not unless the house was shaped like an upside-down pyramid. Newton must always be obeyed, so unless there's some angled surface for air molecules to smack into and be deflected donward off of, there's nothing pushing the building up. So long as the building is relatively sealed, there's nothing pushing up on the roof of the house (because of the size of a hurricane, static air pressure inside the house is going to be about the same as the static air pressure outside of the house).
"Wind pressure" only happens to surfaces that are tangetial to the wind direction (i. e. has air molecules smacking against it).
"If air was allowed through the house at the same speed (assuming an airflow parallel to the ground), the negative-lift generated inside the house would somewhat offset the lift occurring outside (a good thing)."
Only if the airflow through your house was perfectly laminar, and it would be anything but. Instead, the air molecules that flow through your home will be smacking off of everything and anything, especially interior walls. As they rebound, a good deal of them will be deflected upwards, towards the roof, pushing it up.
"I believe in some places in the Caribbean, they open the front and back doors wide open to help keep the roof from blowing off."
Unless those people have nothing in their homes that would restrict airflow (which might be possible, considering poverty levels in the region), the only people I could see giving that advice would be contractors.
"US $80,000 college education is about the equivalent of most European high school diplomas."
Source?
"And I hate to tell you but in today's world of easy credit and massive debt any moron who does in fact just drink and beats his wife does in fact drive around in $50,000 SUVs"
Sounds like you've never met a repo man. You should be thankful.
"and in essence they are community owned since the pool of credit from which those funds are drawn is the public trust."
No, the credit comes from the private institutions making the loans. The Federal Reserve only loans money to other bank, at very low interest rates and a very short term. The people responsible for most of the interest rate (because they're the ones that will end up paying for the repo man) are the private banks.
"Educate yourself before spewing"
Hypocrite.
Re:Sounds perfect for Florida...
on
Space-Age Houses
·
· Score: 2, Informative
"I believe tornado instructions include opening doors / windows on the leeward side of the house for the same reason."
I'm pretty sure that's simply to keep the windows from breaking. A tornado's small size means you can get some truly vicious pressure differentials over a relatively short distance, and even if a tornado doesn't pass close enough by your house to knock it down, most modern houses don't leak air fast enough to avoid... well... explosive decompression.
And you would only open one side of the house to avoid getting airflow under your roof and lifting it off, and it's usually a good idea to open the side that stuff isn't trying to come in through.
Re:Sounds perfect for Florida...
on
Space-Age Houses
·
· Score: 2, Interesting
"As the air passes over it, the structure is pressed down rather than tipping."
Tipping isn't the main problem. The problem is when one or two windows are broken, allowing airflow through the house. Once that happens, you start to generate lift, which rips roofs off of houses. This is why you're supposed to shutter your windows in a hurricane.
And as for "How often do you see 220 km/h winds?" angle, Hurricane Charley hit Florida with sustained winds over 230 km/h, with recorded gusts over 290 km/h on land. Don't forget that hurricanes are categorized by sustained windspeed; even weaker storms are capable of gusting over 220 km/h for brief periods.
Back when I was evacuating from Floyd, I promised myself that if I'm ever able to have my own home built it will be out of concrete and steel. Even after seeing this I still feel that way.
"Further, they seized 150 computers - over 100 that were *completely unrelated* to the charges."
First off, where does that 100 number come from? Source?
Secondly, how are you sure they were all "completely unrelated" to the charges? Even without RTFA I can see in the summary that the DDoS relied on many compromised machines generating malicious traffic. With that said, how can you be so sure that they weren't related to the case?
At any rate, why are you here complaining on Slashdot when you should be learning more about FOIA?
"However, if you're playing GBA-esque games which will mostly fit in memory and demand little CPU, the system will scale peformance down to preserve battery."
Which simply won't happen. If you're going to make a GBA-esque game, you're going to make it for the GBA, because the Game Boy has an installed base "the likes of which God has never seen." Short of nuclear war, that's not going away overnight.
Sony will have developers over the embers to seriously push the PSP hardware to produce games that look and sound superior to GBA games in order to try to give themselves a market. Which means few (if any) games would dare let that CPU wind down for a second, at least not for the first generation of games or so.
"If you can afford a PSP you can afford an external battery pack."
Money in video games is made off of software sales, not hardware. Money spent on a battery is money not spent on games, which results in unhappy publishers to be wooed away by Nintendo.
"Sony is not incompetent"
Only so long as they know what it is they're building. You mentioned that the disc drive won't be using power if it's not being accessed continuously, but that's exactly what will happen when the PSP is used to play a movie. When they optimize the firmware, will it be for a game system or for a "media device?"
And if they leave that up for the software to decide, Sony would be setting themselves up for trouble. All you'd need is a few popular cross-platform games where the developers neglect to include the power optimizations on the PSP version and poof: instant battery benchmarks in Nintendo's favor.
"Just thinking about where people play their gameboys. Is it really that far out of reach of a power source?"
Spoken like someone who's never played with a WaveBird. In general, you'll never notice how much having to work around the length of a cord hampers you until you're given the opportunity to go without one.
After all, why does anything need batteries? Why cordless phones? Why infrared remote controls?
That sounds a lot like those damned 12,000 BTU air-conditioning units I keep seeing in stores. I'd hate to think about how many of those you'd have to go through in a week...
Slashdot Mirror
Mental note: Make sure to actually hit Ctrl-C before Ctrl-V...
"In this case, a property owner has the option of paying, but also has the option of simply waiting, and the graffiti will clean itself up."
/. think there's nothing more than the 48 contiguous!)
Yeah, because nobody in the Yukon lives anywhere near the US border!
(Yeah yeah, I know they can't get it consistently either, but forget complaints about US-centrism: most people on
"In this case, a property owner has the option of paying, but also has the option of simply waiting, and the graffiti will clean itself up."
You know, if I break your kneecap it will eventually heal by itself...
"Innovation in (...) culture will simply occur outside the United States"
Y'know... if what's being broadcasted into my home is "innovation in culture," the rest of the world can take it away from me with my blessing.
"This guy spent thirty seconds writing "What chair?" ?"
Scan-tron at your typical major university. It took him at least that long to bubble in his name, his social, birthdate, mother's maiden name...
"I've never seen "USB" as an option in the "A, C, CDROM"
You young whipper-snappers with your "CD-ROM boot" and your "network boot" are all a bunch of sissies and don't know it! Why, back in my day you were given one option: floppy drive! Hard drives were too expensive and required a team of oxen to get the durned things spinning, so everything was on a truckload of floppy disks.
And when I say floppy, I mean floppy! Those things were flopper than you were when you walked in on your grandmother and I this morning! Have you ever tried putting a pancake into a disk drive?
Them rich snots down the street, they had one of them new-fangled "double density" drive. Managed to get PC-DOS down to less than half a dozen disks (unless you included GW-BASIC!). Us, we were stuck with single sided, single density. Do you have any idea how many of those it takes to fit just one Library of Congress on? Station wagons full!
"Network boot..." bah! We had a network! It didn't just look like a garden hose, it was a garden hose! We'd roll one of our floppy disks up and shove it in and blow it on through to our friends in order to share our music files!
You ever hear Asia being played by your internal speaker, boy?
"Stress test" to me sounds like "Let's see what happens when everybody is on at the same time." It's easie for that to happen if everybody lives relatively close to each other longitude-wise.
Let me just say, while typing on my original MS natural keyboard, sitting next to my original MS Sidewinder game pad... ppbbbbpbpbbttt!!
Could be worse, though... they could be making networking hardware again...
"If you take your typical airfoil, you'll find that there is a lift vector perpendicular to the airflow."
Only if that airfoil has a positve angle of attack, providing the air something to strike against and be pushed downward by. This is why fan blades are angled.
"whereas if you where to measure the air pressure at the top of the airfoil, you'll only measure the static pressure (which is less than the total)"
"but since the airflow is slower below the wing than above it, it will be a higher pressure than above the wing due to the lower dynamic pressure"
In the first paragraph, you have:
(static) + (dynamic1) > (static)
In the second, you have:
(static) + (dynamic2) < (static) + (dynamic1)
Cancelling, we have
(dynamic2) < (dynamic1)
And yet in the second paragraph you also specify that
(dynamic2) > (dynamic1)
Where'd the negation sign come from?
Dynamic pressure below the wing after impact with the bottom of the wing is lower than dynamic pressure above. This is because the air strikes against the bottom of the wing and there is a transfer of momentum from the air to the wing. The air lost momentum without losing mass, so it's moving more slowly, creating less dynamic pressure.
You're confusing cause and effect. The wing isn't pushed up because the air is moving slower, the air is moving slower because the wing is being pushed up.
"Air moving under the roof will create negative lift by reducing the static pressure below it."
.5 * density_air * velocity^2 * area. "
The only things that can reduce static pressure is a reduction in the number of air molecules or a reduction in temperature. This is where Bernoulli comes in.
If you were able to achieve laminar flow under your roof, static pressure under the roof would be exactly the same as static pressure on the leeward side of your roof, no matter what the windspeeds. It would also be the same on the windward side of the roof. There is a dynamic pressure on the windward side of the house from the wind pushing on it, but that is acting paralell to the direction of the wind, attempting to push the roof laterally, not upward.
"Wings work by forcing air to move over them faster than below them not the other way around."
No, wings work mostly by pushing air down, as explained in the Wikipedia article I referenced in my last reply to you. Bernoulli helps to explain why wings are more effective at pushing air downward than one would expect (because the wing also directs air moving over it downard), but Bernoulli alone cannot explain lift.
"The equation for dynamic pressure is
There are a grocery list of things wrong with that statement, but the one most hindering your understanding is that you're forgetting that velocity is a vector. Unless some other vector manages to find its way into that equation, dynamic pressure can only act in the direction the air is moving.
" Total pressure is equal to the dynamic pressure + static pressure."
Only in the direction of airflow. Otherwise you need to invoke trigonometry to find that component of the wind vector acting tangentially to the surface.
Static pressure is different from dynamic pressure in that it is the same reguardless of direction; molecules are moving in all directions and, because of mass/energy conservation, they impact all sides of a container/surface/etc. equally, cancelling each other out.
"but the static pressure (that measured by a barometer) is substantially different if the winds outside the house are strong (which is why windows blow out, not in)."
This is true, but only in the case of a tornado, and only on the leeward side of the house.
"Only in a tornado" because tornados are very small and very fast. With large storm systems (like a hurricane), static air pressure changes gradually over time (in terms of centimeters of mercury per hour), giving enough time for the static air pressure within the house to gradually meet it. With a tornado, the change in static pressure around the house can happen as quickly as with a bomb. The static pressure around the house drops too quickly for the air inside the house to catch up, resulting in a net pressure on the leeward windows outwards.
"Only on the leeward side" because of the effects of dynamic pressure. In the absence of winds, with just the change in static pressure, all the windows of the house would blow out. However, on the windward side of the house there is also the dynamic pressure from the winds trying to push those windows in, a high enough dynamic pressure to cancel out the low static pressure and then some(!). The net pressure difference in that case is inward.
The reading from the barometer you mentioned will depend solely on how close it is to the tornado, not what direction the winds are moving or how fast they are going.
"By opening the windows/doors of the house, you are lowering the static pressure in your house, thus helping keep the roof on it (at the cost of letting the storm in the house, of course)."
As mentioned in my previous post, opening all your windows will cause a turbulent airflow through your house, with some air molecules being deflected upwards to tear your roof off.
"Lift occurs when you have a high-velocity fluid moving above an object while a lower velocity fluid is moving below the object."
No, lift occurs when air pushes something up. From the sounds of things, it looks like you're hung up on the classic "bad science" definition of lift. Wikipedia has an article here that explains lift in a way that doesn't give Bernoulli more credit than he's due.
"In the case of a roof in a hurricane, there can be over 200kph winds above with 0kph below resulting in tremendous lift."
Not unless the house was shaped like an upside-down pyramid. Newton must always be obeyed, so unless there's some angled surface for air molecules to smack into and be deflected donward off of, there's nothing pushing the building up. So long as the building is relatively sealed, there's nothing pushing up on the roof of the house (because of the size of a hurricane, static air pressure inside the house is going to be about the same as the static air pressure outside of the house).
"Wind pressure" only happens to surfaces that are tangetial to the wind direction (i. e. has air molecules smacking against it).
"If air was allowed through the house at the same speed (assuming an airflow parallel to the ground), the negative-lift generated inside the house would somewhat offset the lift occurring outside (a good thing)."
Only if the airflow through your house was perfectly laminar, and it would be anything but. Instead, the air molecules that flow through your home will be smacking off of everything and anything, especially interior walls. As they rebound, a good deal of them will be deflected upwards, towards the roof, pushing it up.
"I believe in some places in the Caribbean, they open the front and back doors wide open to help keep the roof from blowing off."
Unless those people have nothing in their homes that would restrict airflow (which might be possible, considering poverty levels in the region), the only people I could see giving that advice would be contractors.
Now, moving on to your other comment...
God bless the moderators...
"US $80,000 college education is about the equivalent of most European high school diplomas."
Source?
"And I hate to tell you but in today's world of easy credit and massive debt any moron who does in fact just drink and beats his wife does in fact drive around in $50,000 SUVs"
Sounds like you've never met a repo man. You should be thankful.
"and in essence they are community owned since the pool of credit from which those funds are drawn is the public trust."
No, the credit comes from the private institutions making the loans. The Federal Reserve only loans money to other bank, at very low interest rates and a very short term. The people responsible for most of the interest rate (because they're the ones that will end up paying for the repo man) are the private banks.
"Educate yourself before spewing"
Hypocrite.
"I believe tornado instructions include opening doors / windows on the leeward side of the house for the same reason."
I'm pretty sure that's simply to keep the windows from breaking. A tornado's small size means you can get some truly vicious pressure differentials over a relatively short distance, and even if a tornado doesn't pass close enough by your house to knock it down, most modern houses don't leak air fast enough to avoid... well... explosive decompression.
And you would only open one side of the house to avoid getting airflow under your roof and lifting it off, and it's usually a good idea to open the side that stuff isn't trying to come in through.
"As the air passes over it, the structure is pressed down rather than tipping."
Tipping isn't the main problem. The problem is when one or two windows are broken, allowing airflow through the house. Once that happens, you start to generate lift, which rips roofs off of houses. This is why you're supposed to shutter your windows in a hurricane.
And as for "How often do you see 220 km/h winds?" angle, Hurricane Charley hit Florida with sustained winds over 230 km/h, with recorded gusts over 290 km/h on land. Don't forget that hurricanes are categorized by sustained windspeed; even weaker storms are capable of gusting over 220 km/h for brief periods.
Back when I was evacuating from Floyd, I promised myself that if I'm ever able to have my own home built it will be out of concrete and steel. Even after seeing this I still feel that way.
"Further, they seized 150 computers - over 100 that were *completely unrelated* to the charges."
First off, where does that 100 number come from? Source?
Secondly, how are you sure they were all "completely unrelated" to the charges? Even without RTFA I can see in the summary that the DDoS relied on many compromised machines generating malicious traffic. With that said, how can you be so sure that they weren't related to the case?
At any rate, why are you here complaining on Slashdot when you should be learning more about FOIA?
"In a small shop situation like this,"
How much of a small shop is it when the boss can jump $750,000 bail and fly to Morocco?
Where's the hard drive in the Dreamcast?
"crippled by 640KB of memory."
Are we talking about the PS2, or the PS/2?
"However, if you're playing GBA-esque games which will mostly fit in memory and demand little CPU, the system will scale peformance down to preserve battery."
Which simply won't happen. If you're going to make a GBA-esque game, you're going to make it for the GBA, because the Game Boy has an installed base "the likes of which God has never seen." Short of nuclear war, that's not going away overnight.
Sony will have developers over the embers to seriously push the PSP hardware to produce games that look and sound superior to GBA games in order to try to give themselves a market. Which means few (if any) games would dare let that CPU wind down for a second, at least not for the first generation of games or so.
"If you can afford a PSP you can afford an external battery pack."
Money in video games is made off of software sales, not hardware. Money spent on a battery is money not spent on games, which results in unhappy publishers to be wooed away by Nintendo.
"Sony is not incompetent"
Only so long as they know what it is they're building. You mentioned that the disc drive won't be using power if it's not being accessed continuously, but that's exactly what will happen when the PSP is used to play a movie. When they optimize the firmware, will it be for a game system or for a "media device?"
And if they leave that up for the software to decide, Sony would be setting themselves up for trouble. All you'd need is a few popular cross-platform games where the developers neglect to include the power optimizations on the PSP version and poof: instant battery benchmarks in Nintendo's favor.
"Just thinking about where people play their gameboys. Is it really that far out of reach of a power source?"
Spoken like someone who's never played with a WaveBird. In general, you'll never notice how much having to work around the length of a cord hampers you until you're given the opportunity to go without one.
After all, why does anything need batteries? Why cordless phones? Why infrared remote controls?
"Or, you know, you could play video games on it."
:)
Only if the games were actually good. Recall how quickly the Xbox was hacked to run the OS of the Week compared to the GameCube.
"I say we have a strong candidate for the next national poet!"
Bah. The man can't hold a candle to Rumsfeld!
"the article claims that the five hubs each contained 40 petabytes (7200 Libraries of Congress) which at my count is about 160,000 250GB hard drives."
Ah, but you see the RIAA was involved, so what we're actually talking about here is the "equivalent" of 40 petabytes.
That sounds a lot like those damned 12,000 BTU air-conditioning units I keep seeing in stores. I'd hate to think about how many of those you'd have to go through in a week...
Distasteful? Yes. Constitutional? Fuzzy gray area. Said speech still legal? Yes.
Besides, freedom of speech doesn't mean either a free soapbox or the freedom to block public rights-of-way.