Your power supply's max rated output is 500W. Switching power supply's are around 75-80% efficient, so your computer could be drawing 666W continuous, maybe even more peak.
Good catch. I mentioned the efficiency of the DC-AC converter in the UPS, but forgot to mention this one.
yes, some monitors do draw more power (I really ought to look at my book and see what I actually draw:), I was hoping that he'd be able to compile a list of his stuff and figure out what he needs.
I normally don't think of "peak" values. That 120V I used is the RMS value, not the peak value. Working with microwave circuits, I normally don't even think about voltages and currents, but the RMS power delivered (in log units).
My response was an anwer of "maybe." It depends on the DC-AC converter electronics. Look at the max deliverable currents; you don't want to exceed those. Beyond that, it only depends on how long you want the thing to work!
Yes, you can. "Volt-amps" are units of electric power, V*I, where V and I are vectors (the load may be reactive and the V vector and the I vector may not be parallel). If the V and I vectors are going in the same direction, they can be considered scalars and "volt-amps" becomes "watts."
Batteries are rated in "Amp-hour" ratings. That is, they can (to a first approximation), deliver current "I" for time "t" where I*t= the rating. I say "to a first approximation" because the time-to-discharge as a function of current draw is not actually linear, but is really more like an exponential.
Of course, there's some efficiency lost in the DC-AC converter electronics. I don't have a clue what it is; perhaps 80% efficiency is good?
So you have a setup like mine: PC with 500W supply, monitor, printer, speakers. I would recommend NOT putting the printer and speakers on the UPS. Only essential equipment that needs power in order to shut everything down gracefully should be on the UPS.
My monitor eats maybe 50W, and my PC consumes 500W max: 550W worst-case.
According to this page, a APC BackUPS 650 (rated for 640VA), will operate a 400W load for seven minutes. With a perfect 120V output, that (perfectly resistive!) load is drawing 3.333A. With the 80% efficiency I mentioned above, it implies that the battery has an amp-hour rating of about 0.5Ah (500mAh). (0.5Ah * 0.8 eff)/3.333A = 0.12 hours (7.2 minutes).
My 550W load (assuming again that it's purely resistive) will draw 4.6A at 120V. This same UPS (assuming that the switching electronics can handle it!) will operate my machine for 0.087 hour (5.2 minutes), plenty of time to shut down.
So: to find the minimum-sized UPS you need, add up the load of the essential equipment, calculate the required current, and find a UPS with a big enough battery to provide you with a comfortable shutdown time.
Don't you have to already have root access to change the/etc/lilo.conf and re-run lilo to activate the new configuration? So to use your plan to get root access without a password you have to have root access (with a password)? Huh?
I am in the same boat you are; I think I received about 50 bounce messages today at work, but maybe one or two copies of the Sobig Trojan. Just tonight I received two copies of the Trojan in my home mail account out of 24 new messages.
That's the same number of Nigerian money laundering scam emails I received! I had one erroneous bounce tonight.
In Germany (ebay.de), we've got lot's of persons from GB, Spain, Romania "selling" expensive goods (plasma, G4-powerbook) very cheaply under accounts originating from the US.
Wow, selling plasma on eBay! How do you keep it ionized?
First of all, full disclosure: I am against computers in schools. The major problem is that people today do not understand the role of education. Education is not to make that child grow up into a good worker bee; it's to make that child become a better person. There's too little time already spent on actual *learning* and too much time wasted on things like:
Slowing down for children that have been "mainstreamed" into classes they don't belong
Watching movies based on literature instead of reading the literature
Worrying about hurting students' feelings with poor grades, missing the point that self esteem is gained by overcoming adversity, not opening presents
Undisciplined students that come from negligent parents and have no respect for authority or social conventions
The best place for a computer in a primary school is nowhere. Perhaps in the office to automate cumbersome clerical duties.
The Anonymous Coward writes:
I hate Macs, BUT like many people in their early 20's now, my first exposure to computers were Apple II E's, IIGS's, and Mac's in elementary school...
You're in your early 20s and used either an Apple ][e or Apple ][gs in elementary school? Wow. Those machines are as old as you are! I'm ten years older than you and could say the same thing.
Anyway, to be on-topic... I agree with those that post about getting a new mouse.
I've never had a problem with scroll wheels, although they still give us mechanical mice at work. I have to clean the rollers in it pretty regularly. Pencil eraser to scrub the stuff off, and then shake the gunk out...
Dear god it hurts. How is it that someone so woefully missinformed manages to post all this bollocks and come away thinking he's done us a favour?
Any even slightly strenuous activity can cause DOMS (Delayed Onset Muscle Soreness) if you're not properly acclimated. A couple of weeks ago I changed my chest work routine to include decline or flat-bench dumbell flyes (to "failure"), followed immediately by dumbell presses (to "failure"), that cycle being one "set." After that first day I was extremely sore. Now it doesn't bother me anymore. I can only imagine how funny I looked after my first set of good-mornings, but I don't get sore anymore. Tired, yes. Sore, no.
Oh, looking through your list at this link, I didn't see anything that dealt with sports medicine at all.
I read something similar to this in Muscle and Fitness about a year ago, but the note there pertained to increased mental function in elderly men.
As a personal note, I've used creatine monohydrate powder off and on for about a year. I noticed somewhat increased lifting performance, but along with it a somewhat increased thirst. Be sure to drink *lots* of water if you take creatine. I didn't notice any difference between a creatine/glycogen stack (CELL-TECH) versus using a plain creatine monohydrate powder mixed in water, execpt the stacked product was much more expensive.
One thing to remember that merely taking a supplement (other than anabolic steriods) is not going to make you look like this guy. Athletic use of creatine delays the onset of muscle fatigue by enhancing the resynthesis of ATP from ADP and creatine phosphate. In other words, it allows you to do a little more work, a little faster than you could without it. It's a subtle, but measureable effect.
I've had a Roomba since last November. Although it's "AI" software *could* use some refinement, look what it's got for a brain: it's a puny little PIC18-series microcontroller! 8K of program space or something like that! 256 bytes of RAM?
The main problem I have with the Roomba is that the wife won't use it when she's home because it's noisy, and she doesn't like me to move certian furniture items out of the way to facilitate cleaning (I move those same pieces when manually sweeping). So the only time that Roomba gets to play are my off Fridays (every other week) or evenings when the wife isn't home.
Sporadic use means that the cat hair accumulates to Roomba-choking volumes. Roomba is definitely a maintenance machine, not a floor scrubber. It does, given its limitations, do a marvelous job. It's more thorough than manually sweeping our wood floors. I've been very happy with my Roomba.
I suppose you're referring to this one, where he writes about the House passing a bill to allow the re-importation of drugs from overseas (Canada). What has current profitability to do with what he projects would happen if the House bill is signed into law?
Nothing.
What Williams is saying is quite simple: remove the ability to profit from production of drugs, which includes not only manufacture and R&D but navigating the FDA approval process, then the drugs will not be produced. I quote:
If Congress enacts laws preventing price discrimination, both foreigners and Americans will lose because it will reduce the profitability of drug manufacture and hence drug development incentives. I ask you which is preferable: a life-saving drug at a high cost or no life saving drug at all? Americans would be much better served by trying to do something about FDA's costly approval process.
Whether they are not produced because there's no money to be made, or they're not produced because the companies have gone under, the result is that the drugs we will need won't be there.
Too bad you can't get replacement Fujitus anymore, as they *all* die. I have a 20GB doorstop on top of my desk right now. There's also an American class action lawsuit against Fujitsu.
Slashdot Mirror
That is some very well thought out planning. Big props to those guys!
Perhaps he's going to use something like this or this
Good catch. I mentioned the efficiency of the DC-AC converter in the UPS, but forgot to mention this one.
yes, some monitors do draw more power (I really ought to look at my book and see what I actually draw
I normally don't think of "peak" values. That 120V I used is the RMS value, not the peak value. Working with microwave circuits, I normally don't even think about voltages and currents, but the RMS power delivered (in log units).
My response was an anwer of "maybe." It depends on the DC-AC converter electronics. Look at the max deliverable currents; you don't want to exceed those. Beyond that, it only depends on how long you want the thing to work!
Yes, you can. "Volt-amps" are units of electric power, V*I, where V and I are vectors (the load may be reactive and the V vector and the I vector may not be parallel). If the V and I vectors are going in the same direction, they can be considered scalars and "volt-amps" becomes "watts."
Batteries are rated in "Amp-hour" ratings. That is, they can (to a first approximation), deliver current "I" for time "t" where I*t= the rating. I say "to a first approximation" because the time-to-discharge as a function of current draw is not actually linear, but is really more like an exponential.
Of course, there's some efficiency lost in the DC-AC converter electronics. I don't have a clue what it is; perhaps 80% efficiency is good?
So you have a setup like mine: PC with 500W supply, monitor, printer, speakers. I would recommend NOT putting the printer and speakers on the UPS. Only essential equipment that needs power in order to shut everything down gracefully should be on the UPS.
My monitor eats maybe 50W, and my PC consumes 500W max: 550W worst-case.
According to this page, a APC BackUPS 650 (rated for 640VA), will operate a 400W load for seven minutes. With a perfect 120V output, that (perfectly resistive!) load is drawing 3.333A. With the 80% efficiency I mentioned above, it implies that the battery has an amp-hour rating of about 0.5Ah (500mAh). (0.5Ah * 0.8 eff)/3.333A = 0.12 hours (7.2 minutes).
My 550W load (assuming again that it's purely resistive) will draw 4.6A at 120V. This same UPS (assuming that the switching electronics can handle it!) will operate my machine for 0.087 hour (5.2 minutes), plenty of time to shut down.
So: to find the minimum-sized UPS you need, add up the load of the essential equipment, calculate the required current, and find a UPS with a big enough battery to provide you with a comfortable shutdown time.
Not only is it the wrong show, but he doesn't even know the character's name!
(-1: Troll)? Aw, come on. That was funny!
Replying to your .sig:
/etc/lilo.conf and re-run lilo to activate the new configuration? So to use your plan to get root access without a password you have to have root access (with a password)? Huh?
Don't you have to already have root access to change the
I am in the same boat you are; I think I received about 50 bounce messages today at work, but maybe one or two copies of the Sobig Trojan. Just tonight I received two copies of the Trojan in my home mail account out of 24 new messages.
That's the same number of Nigerian money laundering scam emails I received! I had one erroneous bounce tonight.
I think you mean chemotherapy , since kimotherapy isn't a word.
Wow, selling plasma on eBay! How do you keep it ionized?
Perhaps we should use a less confusing term. "Software Liberty" comes to mind.
The best place for a computer in a primary school is nowhere. Perhaps in the office to automate cumbersome clerical duties.
The Anonymous Coward writes:
You're in your early 20s and used either an Apple ][e or Apple ][gs in elementary school? Wow. Those machines are as old as you are! I'm ten years older than you and could say the same thing.
That's what I thought you meant. :)
None of them used stolen American material - just ideas that had been circulating.in the scientific press, seeded with the results of espionage.
Say what?
Do you have stairs in your house?
Don't you mean....
Worst... Ask Slashdot... EVAR!
Anyway, to be on-topic... I agree with those that post about getting a new mouse.
I've never had a problem with scroll wheels, although they still give us mechanical mice at work. I have to clean the rollers in it pretty regularly. Pencil eraser to scrub the stuff off, and then shake the gunk out...
Any even slightly strenuous activity can cause DOMS (Delayed Onset Muscle Soreness) if you're not properly acclimated. A couple of weeks ago I changed my chest work routine to include decline or flat-bench dumbell flyes (to "failure"), followed immediately by dumbell presses (to "failure"), that cycle being one "set." After that first day I was extremely sore. Now it doesn't bother me anymore. I can only imagine how funny I looked after my first set of good-mornings, but I don't get sore anymore. Tired, yes. Sore, no.
Oh, looking through your list at this link, I didn't see anything that dealt with sports medicine at all.
I agree. The side-effects he mentioned are historically associated with juicing (taking anabolic steriods), not with creatine.
I read something similar to this in Muscle and Fitness about a year ago, but the note there pertained to increased mental function in elderly men.
As a personal note, I've used creatine monohydrate powder off and on for about a year. I noticed somewhat increased lifting performance, but along with it a somewhat increased thirst. Be sure to drink *lots* of water if you take creatine. I didn't notice any difference between a creatine/glycogen stack (CELL-TECH) versus using a plain creatine monohydrate powder mixed in water, execpt the stacked product was much more expensive.
One thing to remember that merely taking a supplement (other than anabolic steriods) is not going to make you look like this guy. Athletic use of creatine delays the onset of muscle fatigue by enhancing the resynthesis of ATP from ADP and creatine phosphate. In other words, it allows you to do a little more work, a little faster than you could without it. It's a subtle, but measureable effect.
I've had a Roomba since last November. Although it's "AI" software *could* use some refinement, look what it's got for a brain: it's a puny little PIC18-series microcontroller! 8K of program space or something like that! 256 bytes of RAM?
The main problem I have with the Roomba is that the wife won't use it when she's home because it's noisy, and she doesn't like me to move certian furniture items out of the way to facilitate cleaning (I move those same pieces when manually sweeping). So the only time that Roomba gets to play are my off Fridays (every other week) or evenings when the wife isn't home.
Sporadic use means that the cat hair accumulates to Roomba-choking volumes. Roomba is definitely a maintenance machine, not a floor scrubber. It does, given its limitations, do a marvelous job. It's more thorough than manually sweeping our wood floors. I've been very happy with my Roomba.
Nothing.
What Williams is saying is quite simple: remove the ability to profit from production of drugs, which includes not only manufacture and R&D but navigating the FDA approval process, then the drugs will not be produced. I quote:
Whether they are not produced because there's no money to be made, or they're not produced because the companies have gone under, the result is that the drugs we will need won't be there.
Who was it? You didn't even post a link for us to ignore!
I'm typing this a second time because the first time the 20-second rule bit me!
Too bad you can't get replacement Fujitus anymore, as they *all* die. I have a 20GB doorstop on top of my desk right now. There's also an American class action lawsuit against Fujitsu.