26 posts • joined Friday 18th September 2009 10:45 GMT
those graphs are pointless if you don't label your axes properly!
price ($) - is that per second/minute/hour/day/month? a one off cost?
at £250 you could very nearly get a 500GB SSD
price seems a bit high, for now much more you could get a 500GB SSD and if I had to choose I'd rather have the SSD
Re: Couldn't all this waste heat
Even if you run your servers quite hot the hot air is unlikely to be above 40C. That's simply not hot enough to be particularly helpful for a steam based power station.
You could start using heat pumps or possibly boiling a different liquid but I doubt it'd be worth the effort.
The easiest way to improve the efficiency is to reduce the amount of energy you spend cooling.
If I'm reading this correctly.....
The various ISPs refused to upgrade their cogent links?
Given that cogent would probably have charged them for it isn't that fair enough?
Take my games with me where ever I go?
Assuming I'm prepared to wait for ~4GB to download?
Anyone who still believes that insurance drops at 25 is hopelessly deluded
I'm 26 and my insurance is still best part of a grand (5+ years no claims, never had an accident etc)
I didn't bother with the tracking for a simple reason, most of the driving I do is the stuff they'd describe as being high risk (late night, long distance etc)
Re: Managed PDUs and a serial console
It's there but other than setting an IP or rebooting it, you're limited to the windows command prompt which isn't particularly helpful...
Managed PDUs and a serial console
Managed PDUs and a serial console server, if you're managing more than a couple of servers the actual cost per server isn't too bad. Admittedly not that helpful if you're using windows but if you're using linux it can be a life saver if you break your network connectivity
Also even quite old servers generally support serial bios....
twice as fast as qemu?
twice as fast as qemu shouldn't really be that much of an achievement and for $10,000 I'd rather have some xeons
not enough bacon
I'd like to point out that you don't have enough bacon in your sandwich.
There should be approx as much bacon as bread (one pack per two slices of bread usually works well)
If you're worried about the expensive gauge can you use your old one?
Is your previous gauge cheap enough to risk breaking? could you have both gauges, pump down to required pressure on the expensive gauge, take a reading on the cheaper one. Then isolate the expensive gauge and work entirely from your old gauge?
You should know what it read at 20mbar even if it actually read 30mbar you're only interested to see if it changed.
Is GPS actually accurate enough for this?
I thought consumer GPS was accurate to 3 metres (ish), is that actually enough for this kind of thing? Or atleast more accurate than you could have achieved with some paint (colour coded sheep) and a decent video camera?
Re: 2 screens
I remember playing a zelda game (4 swords I think) on the gamecube which used a gameboy as the controllers, worked really well actually. You ran around on the map using the TV and ever time you entered a cave it switched to a side view on the gameboy
1) do you have to use the same parachute to pull the cord (I'm concerned that the cable might be just enough to prevent your parachute opening properly)
2) can you use the tension in the cord rather than something on the balloon itself ( two contacts head apart by the tension of the balloon with a weak spring that will pull them together once there is no tension on the string? )
How do the batteries look?
I've never tried exposing AA batteries to a decent vacuum but I wouldn't be that surprised if they leaked.
Also this is probably a good test to do to your electronics bundle before launch. If they're going to overheat/leak/explode it'd probably be better to find out before launch
Re: Performance loss at altitude?
I have to agree with you. It sounds like someone gotten confused by a dial that measure the drop in pressure. If low ambient air pressure was a bad thing then we'd never use vacuum pumps in series
now if you were willing to use two balloons
you could launch when the first balloon burst, the second ballon should reduce the rate of fall/keep the assembly pointing up long enough to launch.
Also you could use a similar system as you are using to ignite the rocket motor to burn though the cord holding the remaining balloon
balloon or similar?
The simplest and probably most reliable solution is to have a balloon that expands as the pressure drops pressing a switch. I'd probably suggest that you'd want two of these in case one fails (better for it to launch early than not at all). It'd be simple, relatively easy to test and lightweight.
A 'launch when the string breaks' system is probably unnecessarily complex. If the objective was just to get as high as possible, you'd be better to abandon all the rocketry and simply build a system as light as possible and let the balloon do the entire lift.
won't wireless charging do something pretty horrible to the hard disk?
I'm no physics student (chemistry actually) but won't the wireless charging (generating a nice big magnetic field) cause quite a lot of damage to any magnetic storage like say a hard disk?
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