Actually, the computer keeps very good time, it just doesn't use it. Most PCs load the time from the motherboard clock, which usually contains a crystal, at startup. But after that, the CPU is used as a counter to keep the time (and most seem to really suck). Every once in a while, it will re-sync with the main clock
I'd say there are two "standard" problems with rocket design - going up, and coming back down. The fuel/oxidizer will kill you in part (A), and the parachute (or lack there of) will get you in part (B). If he can take care of the catastrophic explosions, floating back down should be cake.
I think most car stereo preamps are 2V p-p at max volume. Some have 4Vp-p or higher, and brag it up as cleaner (which don't matter if your amp isn't expecting the same). I've driven lots of home stereo's RCA inputs from headphone jack outputs, and a middle level volume seems to be quite compatible. NOTE: don't cheap out on wire!!
As the chip area increases, so does the chance of a defect. Example: (sq wafer with huge die for simplicity)
1 wafer, 10" x 10" each
4 point defects per wafer
100 die per wafer (1" x 1" each)
yield = 96%
1 wafer, 10" x 10" each
4 point defects per wafer
50 die per wafer (2" x 1" each)
yield = 92%
The steppers are usually the limiting factor in current litho. These are the machines that mechanicially align the next mask with the last layer. E-beam has much better control, but as noted above are very slow.
A full moon produces about 1mW/m^2 of light, which is still a fair amount of visiblility. So you can light a football field for about 4W (~100m X 40m). A typical Li battery is 2.9Ah @ 1.5V, or 4.4Wh. Assuming 20% LED effiency(?), you can provide moonlight to rugby game for an hour w/ only 5 batteries!!
Quick little story:
I school, I was helping do to board-level testing in the physics lab. They just got a new room build that was basically a gaint Farady cage - the walls where a fine copper mesh hooked to gnd, about like the bug screen on your windows. Idea being that RF would be blocked,and we could get more accurate measurements.
My boss and I where in there about 30 min when his pager went off.
You've never been on a freeway onramp. If traffics is averaging 80 mi/hr, they're covering 177 ft/s. I figure it takes my 320 HP Camaro about 6 seconds to get to 80. With less then 130 HP, I think you're a menace
For the consumer, wireless is king. Hell, 10 companies can broadcast from the same tower, and I get to choose who I want. Any fool could start a compnay doing this. No streets to dig up, no gaint BabyBell to dick with. Rent a preexisting cellphone tower and duck tape up your little antenna. Herein my little part of Dallas, I've got 1.5Mb/1.0Mb up/dn. Yeah, you have to share the spectrum with your neighbors, but tower only covers a couple mile radius. And when there are only 30 customers signed up, you get great tech support!! p.s. do not point the antenna at your stereo. Damn thing can make your speakers hum from 10 feet away.
Go Philips!!
As long a CD costs $5 more than a tape, you know that the music industry is ripping you off.
1. It's not the material. Blank CDs cost about $.25. Tape about $.75
2. It's not the quanity. More music CDs are sold than tapes.
3. It's not the quality. What, you think they go back to the recording studio and to it again for a cassette?
Perhaps its more difficult mass record CDs, but I doubt. If they can sell the tape for $9.99, they can sell the CD for $9.99
Slashdot Mirror
Maybe we can get Bluetooth in every pixel!!
Actually, the computer keeps very good time, it just doesn't use it. Most PCs load the time from the motherboard clock, which usually contains a crystal, at startup. But after that, the CPU is used as a counter to keep the time (and most seem to really suck). Every once in a while, it will re-sync with the main clock
sounds like Texas....
I'd say there are two "standard" problems with rocket design - going up, and coming back down. The fuel/oxidizer will kill you in part (A), and the parachute (or lack there of) will get you in part (B). If he can take care of the catastrophic explosions, floating back down should be cake.
Now if I can find a shark....
I think most car stereo preamps are 2V p-p at max volume. Some have 4Vp-p or higher, and brag it up as cleaner (which don't matter if your amp isn't expecting the same). I've driven lots of home stereo's RCA inputs from headphone jack outputs, and a middle level volume seems to be quite compatible. NOTE: don't cheap out on wire!!
It's just a matter of time until Sony sues themselves :)
Well, MAYBE my brain :)
$10 of maryj :)
Under a black light different colors do no good. Everything looks purple
As the chip area increases, so does the chance of a defect. Example: (sq wafer with huge die for simplicity) 1 wafer, 10" x 10" each 4 point defects per wafer 100 die per wafer (1" x 1" each) yield = 96% 1 wafer, 10" x 10" each 4 point defects per wafer 50 die per wafer (2" x 1" each) yield = 92%
The steppers are usually the limiting factor in current litho. These are the machines that mechanicially align the next mask with the last layer. E-beam has much better control, but as noted above are very slow.
Shoot, straight Floride gas. Mean enough to bond with most (all?) noble gases
A full moon produces about 1mW/m^2 of light, which is still a fair amount of visiblility. So you can light a football field for about 4W (~100m X 40m). A typical Li battery is 2.9Ah @ 1.5V, or 4.4Wh. Assuming 20% LED effiency(?), you can provide moonlight to rugby game for an hour w/ only 5 batteries!!
Quick little story: I school, I was helping do to board-level testing in the physics lab. They just got a new room build that was basically a gaint Farady cage - the walls where a fine copper mesh hooked to gnd, about like the bug screen on your windows. Idea being that RF would be blocked,and we could get more accurate measurements. My boss and I where in there about 30 min when his pager went off.
You've never been on a freeway onramp. If traffics is averaging 80 mi/hr, they're covering 177 ft/s. I figure it takes my 320 HP Camaro about 6 seconds to get to 80. With less then 130 HP, I think you're a menace
For the consumer, wireless is king. Hell, 10 companies can broadcast from the same tower, and I get to choose who I want. Any fool could start a compnay doing this. No streets to dig up, no gaint BabyBell to dick with. Rent a preexisting cellphone tower and duck tape up your little antenna. Herein my little part of Dallas, I've got 1.5Mb/1.0Mb up/dn. Yeah, you have to share the spectrum with your neighbors, but tower only covers a couple mile radius. And when there are only 30 customers signed up, you get great tech support!! p.s. do not point the antenna at your stereo. Damn thing can make your speakers hum from 10 feet away.
I suggest a cat-apult
Go Philips!! As long a CD costs $5 more than a tape, you know that the music industry is ripping you off. 1. It's not the material. Blank CDs cost about $.25. Tape about $.75 2. It's not the quanity. More music CDs are sold than tapes. 3. It's not the quality. What, you think they go back to the recording studio and to it again for a cassette? Perhaps its more difficult mass record CDs, but I doubt. If they can sell the tape for $9.99, they can sell the CD for $9.99