"(since it usually takes one watt of cooling to offset 1 watt of heat generation)"
I disagree with that.
I once calculated how much an air-conditioning system would need, using SEER numbers of recent minimal requirements, I found required cooling power to be 25-35% of the heat.
SEER numbers account for the whole AC system across whole range of use (time of day, etc).
Remember that airconditioners use heat pumps, making it need less than a watt per watt (...). If you don't know what I mean with that, look up the difference between resistor heating and heat pump heating for heating a house, and relizing that a heat pump is a reverse AC... Or just lookup what 'SEER' means, or simple compare BTU numbers with amps/wattages of AC units...
Most people complaining about bad keyboard just have a bad keyboard. Some $10 piece of junk. They just don't know about the keytronic ergoforce yet.
I had some old, heavy keyboard that was my absolute favorite. Bad enough that I would scour for used ones and clean them up, hoping to get a supply large enough to last through my 'typing career' years...
cdbaby, iirc that was around before the web, with some sort of gopher or telnet interface, starting out a little later than the imho first on-line store cdconnection.com which was on-line (with international shipping) since 1990. Your used cdconnection.com to going to it with telnet.
Most people didn't even know what the Internet was, nor that it existed, back in 1990. That was so early in Internet time, it was still before the period when most people were actually proud that they didn't know how to use a computer.
Well, 'open source' has that name for a reason. I'm not sufficiently into windows to use terms like 'Windows Group Policy', but I suspect _you_ know pretty much what it entails, so why don't you just make and submit a patch for Firefox?
You will be revered by others waiting for that specific feature.
"Since 1990, the amount of Social Security taxes paid by illegal aliens has been increasing rapidly. Nearly $300 billion has been paid under bogus Social Security numbers."
Well, the original idea was to just take a taxi to the parties in the area, so that the astronauts wouldn't have to stay sober for the trip back to the spaceship. But, since they weren't invited to the good moon parties anyway (hey, rocketscientists...), they deciced to drive around and look-see if there was something fun to do...
"Employers submit taxes which are tagged to SSNs every year. Most employers submit these taxes quarterly. The IRS conducts audits and screens for invalid SSNs. So, no the employers cannot screen, but the IRS does this for them."
I'll call your bluff, because less than a year ago, when they did some special investigations at, of all places, a major airport in the US, they found that a very significant portion of the workers (with access to restricted areas in the airport nonetheless) were people who gave the airport authorities false ssn's...
So, in theory you may be correct, but in practice, even in airports, it's not an ideal world...
"Personally, I'd like to see cost-to-orbit decreased by new technology. To me that should be the major national goal."
So do I, and I agree, but not for NASA. NASA is there to do science and the hard or next to impossible stuff. Commercial companies (like the ones that joined for the x-prize) are there for the cost issue and market opportunities.
Re:I'm all for science/technology/astronomy but...
on
Back to Moon in 2015?
·
· Score: 1
But the stuff that is cheap on earth won't be cheap on the moon.
Until the chinese have setup their moon base that is...
IMHO, It's probably better to launch the payload separate from the people. I don't think we need a truck driver anymore to get the heavy loads in orbit, and a small launch system for people is easier to make safe.
"So there's going to be a period after 2010 during which the US won't have a heavy launch capability. Probably a long period."
IMHO, the Delta-IV heavy with its three boosters has a pretty frigging heavy launch capability. Granted, it's not the 65K lbs (leo) of the shuttle, but 50.8K lbs (leo) is pretty good in my book (it's more than the ariane 5).
Actually, I read recently that the martian dust is much worse than the moon dus, because the martian environment contains a lot of very strong oxidizers... Hence the red color (rust), and no, it's not a joke (I'm just to lazy to google for you guys, it was on one of the mars rover websites, or sciencedaily, or universetoday, or astrobio.net or something like that)
I tried the pocketpc version of sjphone on it with stanaphone and freeworlddialup, and that worked fine (after spending most time getting the crappy pocketpc wifi software to work again).
Of course, it will be much better geek value when I can run a full pabx on it (asterisk...).
I'd just like to say that you guys made great progress! Keep up the good work!
About some of these pda's, I read about USB host support. Do you think the x50/x50v can be USB hosts? That would be a really nice feature with a usb harddisk... especially with the intel 2700g and some appropriate xvmc support, or a special version of mplayer or something.
I've had palmos on a clie, and now have the x50v. The x50v is really nice hardware with the fast cpu, the 2700g, the bluetooth and the wifi. The OS, however sucks badly. Every time when I have used bluetooth to get on the Internet, and want to go back to wifi, I have to go back change/fix network settings, reset the wifi (on/off), etc, a couple of times before the blasted thing will even associate to my wifi router.
It's has pocketpc-2003, or is it 'windows mobile 2003' whatever. The built-in network connectivity software just plain sucks.
That, and the pocketpc web browser sucks big time. Not only does it render badly and misses java support, it even doesn't allow multiple windows, let alone tabs.
Oh, and the email client in the pocketpc is also pretty much useless.
And the only way to display pdf files is to convert them first using a PC? what where they thinking, people did not get pdf files from the Internet directly or something? Sure, it may not have been on the marketing radar of either Adobe or MS, but it plains sucks for me, the user.
Linux on the x50v will be an amazing experience compared to that.
There is much more in the world than web server performance.
In applications that actually need to mainly use the CPU, instead of mainly do I/O (web servers, file servers, database servers), the OS overhead is negligible, and the gain to be had from avoiding pipeline stalls can be significant.
btw: I you have a >1gbit internet pipe to serve your static web pages over, then you can also afford a second system to get more speed.
"32 threads in hardware on one chip is the same as 32 slow CPUs."
Nope, it's the same as that single-threaded fast chip, but instead of wasting cycles during a pipeline stall, it will switch over to one of the other threads. Add to that the reduced thread&task-switch overhead and you've got a free CPU upgrade.
Granted, it's not gold spun out of wool, but it removes wasted cycles and costs only a few extra transistors (esp. compared to the cache size, etc).
That holds only if your memory 'cycles' are pipeline delay cycles that don't lock the memory for more than one cycle. Which, for dram, is not the case on a page boundary or switch (cas precharge).
If your external memory doesn't have the bandwidth of your CPU core, you will need cache either way.
Actually black-and-white was 60Hz, NTSC is 60*1000/1001 Hz (which results in the ~29.97Hz frame rate). The reduction was done to remove some interference for the color signal.
There are little electronic devices that use a cryptographic challenge. Meaning: During login, the website displays a 'challenge code' that you enter into the device, and the device returns the result calculated with an RSA-type algorithm using additional data from your bank card.
That is better than a tear-sheet, because the device needs the card + pin + challenge code before it gives the result to be entered into the website for logging in. The result code can be used only once. Even if somebody steals your card and the device, and looked over your shoulder with a note pad while you used it, they would still only be able to access your account if they also saw the PIN that you entered into the device. If they got the PIN, but not your bank card or not the (a) device(s), then you 're safe too. If they rob your card and the device, you're also safe unless you give them the pin...
Many (all?) European banks use them, and I think e-trade offers them too.
btw, if only the keyboard is logged with a hardware key, then some focus changing with the mouse and/or copy-pasting should also make the password invisible in the keylogger.
Slashdot Mirror
"(since it usually takes one watt of cooling to offset 1 watt of heat generation)"
I disagree with that.
I once calculated how much an air-conditioning system would need, using SEER numbers of recent minimal requirements, I found required cooling power to be 25-35% of the heat.
SEER numbers account for the whole AC system across whole range of use (time of day, etc).
Remember that airconditioners use heat pumps, making it need less than a watt per watt (...). If you don't know what I mean with that, look up the difference between resistor heating and heat pump heating for heating a house, and relizing that a heat pump is a reverse AC... Or just lookup what 'SEER' means, or simple compare BTU numbers with amps/wattages of AC units...
Most people complaining about bad keyboard just have a bad keyboard. Some $10 piece of junk. They just don't know about the keytronic ergoforce yet.
I had some old, heavy keyboard that was my absolute favorite. Bad enough that I would scour for used ones and clean them up, hoping to get a supply large enough to last through my 'typing career' years...
Not anymore, thanks to keytronic.
cdbaby, iirc that was around before the web, with some sort of gopher or telnet interface, starting out a little later than the imho first on-line store cdconnection.com which was on-line (with international shipping) since 1990. Your used cdconnection.com to going to it with telnet.
Most people didn't even know what the Internet was, nor that it existed, back in 1990. That was so early in Internet time, it was still before the period when most people were actually proud that they didn't know how to use a computer.
Ah, memories.
"RAID, if anything, will increase your latency."
That is so not true for RAID1.
Well, 'open source' has that name for a reason. I'm not sufficiently into windows to use terms like 'Windows Group Policy', but I suspect _you_ know pretty much what it entails, so why don't you just make and submit a patch for Firefox?
You will be revered by others waiting for that specific feature.
You're lazy. It's there halfway through.
Or whatever, live in ignorance, fly a kite.
About supporting the claim of $9B/year:
s _1_55/ai_96403710
http://www.findarticles.com/p/articles/mi_m1282/i
"Since 1990, the amount of Social Security taxes paid by illegal aliens has been increasing rapidly. Nearly $300 billion has been paid under bogus Social Security numbers."
$300B/16 = $18.75B
Ok, the $9B number is too low...
http://www.gao.gov/htext/d0482.htmlo ig/eyeoig10162002.htm / 16/daily26.html
http://www.ssa.gov/oig/executive_operations/eyeon
http://www.bizjournals.com/denver/stories/2002/09
Learn to google.
Well, the original idea was to just take a taxi to the parties in the area, so that the astronauts wouldn't have to stay sober for the trip back to the spaceship. But, since they weren't invited to the good moon parties anyway (hey, rocketscientists...), they deciced to drive around and look-see if there was something fun to do...
It makes absolute sense.
"Employers submit taxes which are tagged to SSNs every year. Most employers submit these taxes quarterly. The IRS conducts audits and screens for invalid SSNs. So, no the employers cannot screen, but the IRS does this for them."
I'll call your bluff, because less than a year ago, when they did some special investigations at, of all places, a major airport in the US, they found that a very significant portion of the workers (with access to restricted areas in the airport nonetheless) were people who gave the airport authorities false ssn's...
So, in theory you may be correct, but in practice, even in airports, it's not an ideal world...
"Personally, I'd like to see cost-to-orbit decreased by new technology. To me that should be the major national goal."
So do I, and I agree, but not for NASA. NASA is there to do science and the hard or next to impossible stuff. Commercial companies (like the ones that joined for the x-prize) are there for the cost issue and market opportunities.
But the stuff that is cheap on earth won't be cheap on the moon.
Until the chinese have setup their moon base that is...
IMHO, It's probably better to launch the payload separate from the people. I don't think we need a truck driver anymore to get the heavy loads in orbit, and a small launch system for people is easier to make safe.
"So there's going to be a period after 2010 during which the US won't have a heavy launch capability. Probably a long period."
IMHO, the Delta-IV heavy with its three boosters has a pretty frigging heavy launch capability. Granted, it's not the 65K lbs (leo) of the shuttle, but 50.8K lbs (leo) is pretty good in my book (it's more than the ariane 5).
Actually, I read recently that the martian dust is much worse than the moon dus, because the martian environment contains a lot of very strong oxidizers... Hence the red color (rust), and no, it's not a joke (I'm just to lazy to google for you guys, it was on one of the mars rover websites, or sciencedaily, or universetoday, or astrobio.net or something like that)
I tried the pocketpc version of sjphone on it with stanaphone and freeworlddialup, and that worked fine (after spending most time getting the crappy pocketpc wifi software to work again).
Of course, it will be much better geek value when I can run a full pabx on it (asterisk...).
"Do you know how much a 12-hour UPS costs??"
Actually, yes, $6k and a couple of bottles of hydrogen.
I'd just like to say that you guys made great progress! Keep up the good work!
About some of these pda's, I read about USB host support. Do you think the x50/x50v can be USB hosts? That would be a really nice feature with a usb harddisk... especially with the intel 2700g and some appropriate xvmc support, or a special version of mplayer or something.
Jelle.
I've had palmos on a clie, and now have the x50v. The x50v is really nice hardware with the fast cpu, the 2700g, the bluetooth and the wifi. The OS, however sucks badly. Every time when I have used bluetooth to get on the Internet, and want to go back to wifi, I have to go back change/fix network settings, reset the wifi (on/off), etc, a couple of times before the blasted thing will even associate to my wifi router.
It's has pocketpc-2003, or is it 'windows mobile 2003' whatever. The built-in network connectivity software just plain sucks.
That, and the pocketpc web browser sucks big time. Not only does it render badly and misses java support, it even doesn't allow multiple windows, let alone tabs.
Oh, and the email client in the pocketpc is also pretty much useless.
And the only way to display pdf files is to convert them first using a PC? what where they thinking, people did not get pdf files from the Internet directly or something? Sure, it may not have been on the marketing radar of either Adobe or MS, but it plains sucks for me, the user.
Linux on the x50v will be an amazing experience compared to that.
There is much more in the world than web server performance.
In applications that actually need to mainly use the CPU, instead of mainly do I/O (web servers, file servers, database servers), the OS overhead is negligible, and the gain to be had from avoiding pipeline stalls can be significant.
btw: I you have a >1gbit internet pipe to serve your static web pages over, then you can also afford a second system to get more speed.
"32 threads in hardware on one chip is the same as 32 slow CPUs."
Nope, it's the same as that single-threaded fast chip, but instead of wasting cycles during a pipeline stall, it will switch over to one of the other threads. Add to that the reduced thread&task-switch overhead and you've got a free CPU upgrade.
Granted, it's not gold spun out of wool, but it removes wasted cycles and costs only a few extra transistors (esp. compared to the cache size, etc).
That holds only if your memory 'cycles' are pipeline delay cycles that don't lock the memory for more than one cycle. Which, for dram, is not the case on a page boundary or switch (cas precharge).
If your external memory doesn't have the bandwidth of your CPU core, you will need cache either way.
Actually black-and-white was 60Hz, NTSC is 60*1000/1001 Hz (which results in the ~29.97Hz frame rate). The reduction was done to remove some interference for the color signal.
Your wife is a binary xor?
There are little electronic devices that use a cryptographic challenge. Meaning: During login, the website displays a 'challenge code' that you enter into the device, and the device returns the result calculated with an RSA-type algorithm using additional data from your bank card.
That is better than a tear-sheet, because the device needs the card + pin + challenge code before it gives the result to be entered into the website for logging in. The result code can be used only once. Even if somebody steals your card and the device, and looked over your shoulder with a note pad while you used it, they would still only be able to access your account if they also saw the PIN that you entered into the device. If they got the PIN, but not your bank card or not the (a) device(s), then you 're safe too. If they rob your card and the device, you're also safe unless you give them the pin...
Many (all?) European banks use them, and I think e-trade offers them too.
btw, if only the keyboard is logged with a hardware key, then some focus changing with the mouse and/or copy-pasting should also make the password invisible in the keylogger.