I have a 1KA plug at work. I had to change the plug last month. The plugs are mammoth. 6 thick cables, each several cm's thick. It took me 5 hours to wire the damn thing. I was just scared, and double tripled checked each connection. When I plugged it in I was scared to turn the thing on.
I only use a tiny fraction of that (for lasers). I don't know why they installed such serious hardware.
For a normal capacitor, the time constant is the rate at which is decreases. Every time-constant the voltage drops by a factor of e (about 2.7). The time-constant is equal to the resistance*capacitance. If these have a very large capacitance, then it would discharge very slowly. Usually the time constant is on the order of micro-seconds or milli-seconds. But if you could get it on the order of days by combining it with a large resistance, then it might be possible that you get an almost smoothish voltage. You would however be only able to use a fraction of the charge actually stored on the capacitor.
Hmm, 1700C is the temperature a normal (non-energy saving) light bulb works at. At 1700 the efficency is terrible (around 1%). To make light bulbs more efficent, you 'merely' need to increase the temperature. The problem is finding materials that you can do this with.
To increase the temperature you need a material that won't oxide, react, etc at high temperatures. The best material is tungsten. However this does rapidly corrode. Hallogen lamps and energy saving light bulbs use this. The tungsten is heated to 2400C. At this temperature it has an efficency of almost 4%. However the tungsten corrodes very rapidly. Halogen lamps have the bulb bit made out of quartz, which makes the halogen air inside react with the tungsten that has corroded off, and pushes it back on to the tungsten. So the corroded tungsten is continually put back on.
Going above 2400C is not simple. Tungsten has a melting temperature of 3400C, but you would need to deal with the corroding at a fantastic rate. Also tungsten is fantastically expensive and rare.
Hi,
I don't really get what you say. The bridge entered an: "exponentially increasing vibrational state"
Why would it do this if it wasn't being vibrated at a resonance frequency? What is negative dampening? I understand SHM and damped SHM, but don't understand how you can get negative dampening.
I was a Lotus Domino developer too for a short while. I never worked out how you are supposed to do version control on it. Or MS Access for that matter.
Game Theory only supports my point. You need a large percentage of the population immunised. The need of the many out weigh the need of the one. Why did you think that game theory supports your point?
I think just reading that would be fine. I realise that you feel insulted about immunising against STDs etc, but please realise that the need to reduce STDs world wide is bigger than your pride. STDs are one of the most serious problems facing society.
Something particularly funny in the UK is that in an area with a low number of vaccinations due to stupid parents, there was an outbreak recently and quite a few number of children died. 90% of them weren't vaccinated because of their stupid parents. I find it funny that science wins again.
I'm not entirely sure if you're seriously or not, but just in case..
The general overview of this is called hill climbing. Imagine you want to find and climb the tallest hill. Consider this tallest hill as been akin to the 'best design'. So you start of from some point, and you just climb up hill. You could end up at the top of some hill, but not the highest. So what you do is you go up the hill 2/3rd's of the time, and down the hill 1/3rd of the time. It's not a great algorithm but it is more likely to find you a taller hill. Simplifying, this is sort of how evolution works.
If you want to read more, google for hill climbing algorithms and read up on simulated annealing etc.
Again, this is _exactly_ what is happening. The sound system is abstracted out and can be used by kde/gnome/anything. The message system (dbus) is being standardised on. Kde, gnome, and other apps will use dbus.
The only middleware part that I would want standardised on now that isn't being standardised on at the moment would be kioslaves.
KDE is not departing away from The Unix Way at all. Please give an example of what middleware layers need to be separated etc.
The _meta_ package is _supposed_ to include the most commonly used apps. You don't have to install it - it's just there to make it easy for you _if_ you want to install the commonly used kde apps.
Um, that's _exactly_ what is happening. NMM is a middleware layer, under KDE, for gnome, and non-kde-or-gnome apps. Phonon is just the c++ wrapper to make it easy for kde apps to use the middleware layer.
Hi. You say "many", but I can't think of what would be a diffraction grating and _not_ holographic. You can have an amplitude or a phase or a phase-and-amplitude hologram in transmission or reflection.
Try reading Feynman's lectures. I love them and can't put them down! They are considered by many to be the best physics lectures ever to be written. I actually don't understand why they aren't used in every physics school. My personal suspicion is because then the publishers would have nothing left to do.
I am also in the UK and I found that the first 2 years of my degree (in Manchester) was a joke. The last year was pretty good though. After my comp sci degree I started a PhD in engineering. I'm now in my final year of that, and into the 2nd year of an open university physics degree.
I've come to love engineering and physics, using my comp sci knowledge to use in those fields. Lots of fun:-)
Slashdot Mirror
Whoosh. Were you born stupid, or did you have to work at it?
I have a 1KA plug at work. I had to change the plug last month. The plugs are mammoth. 6 thick cables, each several cm's thick. It took me 5 hours to wire the damn thing. I was just scared, and double tripled checked each connection. When I plugged it in I was scared to turn the thing on.
I only use a tiny fraction of that (for lasers). I don't know why they installed such serious hardware.
For a normal capacitor, the time constant is the rate at which is decreases. Every time-constant the voltage drops by a factor of e (about 2.7). The time-constant is equal to the resistance*capacitance. If these have a very large capacitance, then it would discharge very slowly. Usually the time constant is on the order of micro-seconds or milli-seconds. But if you could get it on the order of days by combining it with a large resistance, then it might be possible that you get an almost smoothish voltage. You would however be only able to use a fraction of the charge actually stored on the capacitor.
Just an idea.
Who isn't seeing the bigger picture? You think the researchers were doing it fun, and had no idea that it might help a lot of industries?
Hmm, 1700C is the temperature a normal (non-energy saving) light bulb works at. At 1700 the efficency is terrible (around 1%). To make light bulbs more efficent, you 'merely' need to increase the temperature. The problem is finding materials that you can do this with.
To increase the temperature you need a material that won't oxide, react, etc at high temperatures. The best material is tungsten. However this does rapidly corrode. Hallogen lamps and energy saving light bulbs use this. The tungsten is heated to 2400C. At this temperature it has an efficency of almost 4%. However the tungsten corrodes very rapidly. Halogen lamps have the bulb bit made out of quartz, which makes the halogen air inside react with the tungsten that has corroded off, and pushes it back on to the tungsten. So the corroded tungsten is continually put back on.
Going above 2400C is not simple. Tungsten has a melting temperature of 3400C, but you would need to deal with the corroding at a fantastic rate. Also tungsten is fantastically expensive and rare.
Hi,
I don't really get what you say.
The bridge entered an:
"exponentially increasing vibrational state"
Why would it do this if it wasn't being vibrated at a resonance frequency?
What is negative dampening? I understand SHM and damped SHM, but don't understand how you can get negative dampening.
Thanks
Wow 320Gb ! That's like 32GB!
And you wonder why you have to take the short bus to school
I was a Lotus Domino developer too for a short while. I never worked out how you are supposed to do version control on it. Or MS Access for that matter.
Haha. Yes you caught us red handed. _Your_ failure to be able to use words correctly is actually our close mindedness and arrogance.
Uh, why would the moon feel a torque from a falling object?
Game Theory only supports my point. You need a large percentage of the population immunised. The need of the many out weigh the need of the one.
Why did you think that game theory supports your point?
Please read up on this so you don't stay yet another ignorant person.
Good sir, I think you don't really understand immunisation. I recommend reading: http://en.wikipedia.org/wiki/Herd_immunity for a tiny introduction.
6 -93-cdc.gif
Have a look at this graph:
http://en.wikipedia.org/wiki/Image:Rubella-us-196
which shows how when you immunise children you can start to wipe out diseases. That was from http://en.wikipedia.org/wiki/MMR_vaccine
I think just reading that would be fine. I realise that you feel insulted about immunising against STDs etc, but please realise that the need to reduce STDs world wide is bigger than your pride. STDs are one of the most serious problems facing society.
Something particularly funny in the UK is that in an area with a low number of vaccinations due to stupid parents, there was an outbreak recently and quite a few number of children died. 90% of them weren't vaccinated because of their stupid parents. I find it funny that science wins again.
I'm not entirely sure if you're seriously or not, but just in case..
The general overview of this is called hill climbing. Imagine you want to find and climb the tallest hill. Consider this tallest hill as been akin to the 'best design'. So you start of from some point, and you just climb up hill. You could end up at the top of some hill, but not the highest. So what you do is you go up the hill 2/3rd's of the time, and down the hill 1/3rd of the time. It's not a great algorithm but it is more likely to find you a taller hill. Simplifying, this is sort of how evolution works.
If you want to read more, google for hill climbing algorithms and read up on simulated annealing etc.
Again, this is _exactly_ what is happening.
The sound system is abstracted out and can be used by kde/gnome/anything. The message system (dbus) is being standardised on. Kde, gnome, and other apps will use dbus.
The only middleware part that I would want standardised on now that isn't being standardised on at the moment would be kioslaves.
KDE is not departing away from The Unix Way at all. Please give an example of what middleware layers need to be separated etc.
Dude what on earth are you on about.
The _meta_ package is _supposed_ to include the most commonly used apps. You don't have to install it - it's just there to make it easy for you _if_ you want to install the commonly used kde apps.
Um, that's _exactly_ what is happening. NMM is a middleware layer, under KDE, for gnome, and non-kde-or-gnome apps.
Phonon is just the c++ wrapper to make it easy for kde apps to use the middleware layer.
Hi. You say "many", but I can't think of what would be a diffraction grating and _not_ holographic.
You can have an amplitude or a phase or a phase-and-amplitude hologram in transmission or reflection.
Try reading Feynman's lectures. I love them and can't put them down! They are considered by many to be the best physics lectures ever to be written. I actually don't understand why they aren't used in every physics school. My personal suspicion is because then the publishers would have nothing left to do.
I am doing an OU course at the moment, and I love it!
I have a very good friend who is working with the OU on digital seminar things. They are trying to do some sort of online conference teaching thing.
Which drivers do you need?
Google run this partly as a recruitment program. Why on earth would they want to recruit someone who can't even get linux running on his machine?
I am also in the UK and I found that the first 2 years of my degree (in Manchester) was a joke. The last year was pretty good though.
:-)
After my comp sci degree I started a PhD in engineering. I'm now in my final year of that, and into the 2nd year of an open university physics degree.
I've come to love engineering and physics, using my comp sci knowledge to use in those fields. Lots of fun