include a docking port, so you can send a 'cargo satellite' after it to refuel your $10^8 satellite?
This would be expensive [1], but a lot less so than writing off a satellite that ends up in the wrong orbit. Also, you could keep your satellite operational far longer than usual: communications satellites IIRC are written off when they run out of fuel, rather than because of mechanical/electrical failures.
1: or would it? You'd have to launch it, but you're launching just a load of fuel with some maneuvering motors attached to it.
That wasn't the problem. The problem was that Hitler was a gonzo and first prevaricated, then ordered that they be built for bombing - which they were mediocre at, rather than air defense - which they were good at. Mind you, some of the big Yank prop planes could still catch them and shoot them down with a diving start.
That was only one of the problems. There were more:
Germany had shortages of everything including jet fuel and the metals needed to build jet engines. This induced a number of problems, like insufficient training, and engines that self-destructed after a few hours because the turbine blades stretched so much they hit the casing. Engine life was ~10 hours.
The 262's engines were notoriously unresponsive at lower speeds. So they were vulnerable during their landing. IIRC most kills of 262s were scored by Allied planes following a 262 to its base and then shooting it down as it was landing.
Flies in excess of Mach 4, and achieves a low earth orbit.
Uh, no. Try Mach 3, and no orbit at all. 'Orbit' implies enough speed that the speed+gravity vector ends up as a circle. To get that, you need a bit more than Mach 3.
The technology used for the space elevator has little or nothing to do with current in-building elevators.
Those are engineered to a price, a space elevator will have aerospace levels of engineering, with multiple redundant systems, etc.
Also, it should be possible to use multiple 'cars' on a space elevator. If one's stranded, send another one down or up with a maintenance crew.
Re:Come on!! In the era of distributed storage...
on
Saving Digital History
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· Score: 1
If the content is worthwhile, people will hold a copy on their systems worldwide.
IDK about you, but I rarely copy anything I found on the WWW to my local system. I just create a bookmark so I can find it again. When the original site disappears, I'm toast.
If anything, hyperlink technology has made information less plentiful: where you have to buy a book if you want permanent access to it, for digital media a link will suffice (for most purposes). Few people will think about the possibility of the original site disappearing.
The mirrored part IS on the surface, or about one layer of paint away from it (it's right underneath the label). Which means the data is vulnerable.
Also, the materials decay. There have already been reports of early CDs becoming unreadable because the aluminium started corroding. Who knows what will happen in 50 years?
Yes, CDs are relatively stable, but even the manufacturers aren't promising a CD will be readable in 100 years.
I hire by experience and aptitude, not by sex, color, or anything else,
vs.
hell if you showed me a dog that could program a router and had some experience in internet security, he would be on our team, if he wore a tie to the interview.
Well, duh. Haven't you seen the cracking tools in the movies? Running-digit displays, where one digit locks in at random intervals, until the whole code is broken?
I disagree. AFAI understand, the list is not about the tools per se, but the level of understanding required for each tool.
A good programmer really should not care HOW they get things done- ONLY that they DO get them done.
By your definition, a "good programmer" is one who is capable of functioning at a high level in the list. Well, QED. IMO the list doesn't imply a good programmer can't use Frontpage, it only implies that someone who can use Frontpage but is clueless about raw HTML is unlikely to be able to create C code that interacts with APIs or otherwise see the big picture of what he's doing.
Why would this be different from current internet connection options? Especially since the party most likely to eavesdrop has the power to legalize its actions?
The same arguments made in the article for DoP ("data over power lines") can be made for DSL. And the same drawbacks that DSL has (you need to spend a lot on infrastructure, ie extra equipment in telephone exchanges) will apply to DoP. So it won't be cheaper to implement, and the 'broadband gap' (too few customers in rural areas to justify upgrading the exchange) will still apply.
Ameren admits it's not aiming for cheaper-than-DSL links, they just want a piece of the ISP/POP pie.
Just about any radio I can buy here has RDS integrated with it. Here's an explanation. It doesn't seem to have taken off in the US. It is available on some radio stations, but US versions of even high-end car radios don't have RDS.
I recently visited a company where the server room had large windows to the hallway. I guess it's an 'impress the visitors' maneuver, and a stack of Xserves and Xraids would be fabulous for that.
Well, there are two controllers, but AFAI understand, they're not redundant. Each controller controls 7 IDE drives. If the controller conks out, you lose those 7 drives.
It's good to see Apple being pragmatic about this. If IDE offers sufficient performance (and it should, given that each drive has its own IDE controller), then why not use it?
OK, so you can buy SCSI drives that are faster due to higher rpm. But can you build a 2.5 Tb system with SCSI that outperforms an Xserve RAID?
Slashdot Mirror
include a docking port, so you can send a 'cargo satellite' after it to refuel your $10^8 satellite?
This would be expensive [1], but a lot less so than writing off a satellite that ends up in the wrong orbit. Also, you could keep your satellite operational far longer than usual: communications satellites IIRC are written off when they run out of fuel, rather than because of mechanical/electrical failures.
1: or would it? You'd have to launch it, but you're launching just a load of fuel with some maneuvering motors attached to it.
At 50 miles, there's not enough atmosphereto sustain the SR-71's engines.
This page states the SR-71's speed is limited to at most Mach 3.8 by the shock waves off the nose entering the engine intakes.
The Mach 3.2/85kft figures are pretty well established. Anything above that is pure guesswork and/or wishful thinking.
That wasn't the problem. The problem was that Hitler was a gonzo and first prevaricated, then ordered that they be built for bombing - which they were mediocre at, rather than air defense - which they were good at. Mind you, some of the big Yank prop planes could still catch them and shoot them down with a diving start.
That was only one of the problems. There were more:
Germany had shortages of everything including jet fuel and the metals needed to build jet engines. This induced a number of problems, like insufficient training, and engines that self-destructed after a few hours because the turbine blades stretched so much they hit the casing. Engine life was ~10 hours.
The 262's engines were notoriously unresponsive at lower speeds. So they were vulnerable during their landing. IIRC most kills of 262s were scored by Allied planes following a 262 to its base and then shooting it down as it was landing.
Flies in excess of Mach 4, and achieves a low earth orbit.
Uh, no. Try Mach 3, and no orbit at all. 'Orbit' implies enough speed that the speed+gravity vector ends up as a circle. To get that, you need a bit more than Mach 3.
The technology used for the space elevator has little or nothing to do with current in-building elevators.
Those are engineered to a price, a space elevator will have aerospace levels of engineering, with multiple redundant systems, etc.
Also, it should be possible to use multiple 'cars' on a space elevator. If one's stranded, send another one down or up with a maintenance crew.
If the content is worthwhile, people will hold a copy on their systems worldwide.
IDK about you, but I rarely copy anything I found on the WWW to my local system. I just create a bookmark so I can find it again. When the original site disappears, I'm toast.
If anything, hyperlink technology has made information less plentiful: where you have to buy a book if you want permanent access to it, for digital media a link will suffice (for most purposes). Few people will think about the possibility of the original site disappearing.
The mirrored part IS on the surface, or about one layer of paint away from it (it's right underneath the label). Which means the data is vulnerable.
Also, the materials decay. There have already been reports of early CDs becoming unreadable because the aluminium started corroding. Who knows what will happen in 50 years?
Yes, CDs are relatively stable, but even the manufacturers aren't promising a CD will be readable in 100 years.
Um, I was referring to your requiring the applicant wear a tie to the interview, when you say earlier on you hire by "experience and aptitude".
I hire by experience and aptitude, not by sex, color, or anything else,
vs.
hell if you showed me a dog that could program a router and had some experience in internet security, he would be on our team, if he wore a tie to the interview.
You're contradicting yourself.
Well, duh. Haven't you seen the cracking tools in the movies? Running-digit displays, where one digit locks in at random intervals, until the whole code is broken?
Maybe some people just want to have a computer that does what they want, and think *gasp* they might be better served by a PC.
A typical case of YMMV. I find my Mac gets in my way a lot less than my PC (Windows *.*) does.
Another elitest post without a real clue.
I disagree. AFAI understand, the list is not about the tools per se, but the level of understanding required for each tool.
A good programmer really should not care HOW they get things done- ONLY that they DO get them done.
By your definition, a "good programmer" is one who is capable of functioning at a high level in the list. Well, QED. IMO the list doesn't imply a good programmer can't use Frontpage, it only implies that someone who can use Frontpage but is clueless about raw HTML is unlikely to be able to create C code that interacts with APIs or otherwise see the big picture of what he's doing.
The 27/40 MHz bands don't have the bandwidth you need (several MHz) for "broadband" connections.
Why would this be different from current internet connection options? Especially since the party most likely to eavesdrop has the power to legalize its actions?
The same arguments made in the article for DoP ("data over power lines") can be made for DSL. And the same drawbacks that DSL has (you need to spend a lot on infrastructure, ie extra equipment in telephone exchanges) will apply to DoP. So it won't be cheaper to implement, and the 'broadband gap' (too few customers in rural areas to justify upgrading the exchange) will still apply.
Ameren admits it's not aiming for cheaper-than-DSL links, they just want a piece of the ISP/POP pie.
Your right about the scsi cables, absolutely criminal the cost of those stupid things.
Criminal? How about "necessary to ensure survival of the signal during its rugged journey over ~2 m and 7 devices"?
They're shielded cables, of course they're going to be more expensive than an IDE ribbon.
Just about any radio I can buy here has RDS integrated with it. Here's an explanation. It doesn't seem to have taken off in the US. It is available on some radio stations, but US versions of even high-end car radios don't have RDS.
You could argue that having files with identical names modulo their case is just plain dumb to begin with.
I recently visited a company where the server room had large windows to the hallway. I guess it's an 'impress the visitors' maneuver, and a stack of Xserves and Xraids would be fabulous for that.
Well, there are two controllers, but AFAI understand, they're not redundant. Each controller controls 7 IDE drives. If the controller conks out, you lose those 7 drives.
And easy to set up and use. And there you have probably the #1 reason to buy an Xserve.
Yep. Each set of 7 drives has a RAID controller.
It's good to see Apple being pragmatic about this. If IDE offers sufficient performance (and it should, given that each drive has its own IDE controller), then why not use it?
OK, so you can buy SCSI drives that are faster due to higher rpm. But can you build a 2.5 Tb system with SCSI that outperforms an Xserve RAID?
...on the Xerve RAID. Good to see Apple continues to include such essentials.
Have you read the article? The Xserve RAID has redundant everything, and fibre channel.