For once that Fahrenheit unit is kinda useful, you could at least use it! 0F is more or less the coldest temperature you can achieve for a liquid mix of salt and water under standard pressure. So it's entirely possible for a salt lake to have an average temperature of 9F.
Germany is one of the greenest countries in Europe
For some weird definitions of "green". Yes, they sort waste and have nice big photovoltaic plants on their roofs. And... that's about it.
Otherwise, it's just big cars, bigger cars and more expensive cars with a nice "Atomkraft, nein Danke!" sticker. It's also wind and solar electricity that is exported to Norwegian dams with imports mainly coming from French, Swiss and Check nukes. It's also using escalators everywhere, and then paying 70€/month for the gym. It's finally flying to Turkey/Mallorca/Bali for a week-end.
We're freakin' drug addicts : we need our daily dose, and when our shady dealer doesn't play fair, we look beneath the couch. We find some dirty old bag of crack, and scream "Yeah! We're saved! We solved our problem once and for all!"
I find it beautiful, well polished, it works out of the box (with video codecs, mp3, java, flash,...), it is well integrated, it supports interesting projects (mate & cinnamon) and is fully compatible with Ubuntu repositories and 95% of its documentation.
Also, releases bring mostly bug fixes or new features that you can safely ignore. If you find it easy to use LM 12, you won't have any problem using LM 13 or LM 14.
However, this is only a proportion of energy generated from PV modules, hence the "efficacy" and therefore, total energy production, of concentrated solar solutions is less good than unconcentrated modules.
No. A 2-axis tracked CPV system with multi-junction cells will produce more with beam radiation than a 2-axis tracked monocrystalline PV system with global radiation, at least in the regions where CPV is installed (Spain, Israel, Arizona,...). Sure, it won't work well in Norway.
The reason comes from diffuse sunlight - light that has been diffused by the atmosphere or by clouds. This typically accounts for 10% of module illumination in direct sunlight, and much higher in the presence of atmospheric haze/cloud;
Diffuse fraction never falls below 16%. Even a clear, deep blue sky still emits diffuse radiation.
Diffuse light cannot be concentrated by optics, thus concentrated solar PV modules cannot utilise the diffuse light (more precisely, they can utilise it, but not concentrate it - thus if the system uses a 10:1 concentration, then the energy yield from diffuse illumination falls from 10-15% to 1-1.5%).
True, but we're probably talking 500:1 concentration, here.
A boost from 30 to 33% efficiency by switching to concentrating modules could be completely wiped out by the loss of diffuse yield, even in direct sunlight. In non-direct sunlight, hazy or cloudy conditions, the yield can be reduced much more severely; resulting in a net reduction in productivity, despite the higher nameplate efficiency.
33% has been measured under 850W/m2 direct radiation (nominal operating conditions). Compared to 1000W/m2 global radiation (STC), you get 15% less. That's still about 28% of module efficiency. How many single-junction PV modules are there that deliver that much, even in laboratory? None.
This technology is most suited to areas with the most intense direct illumination; e.g. dry areas, at low latitudes (where the role of diffuse light is diminished in proportion).
No 1) Every kind of energy will ultimately be converted to heat. 2) The Earth+Atmosphere system isn't closed, but the only way to change its global energy content is by getting more or less radiation from space. 3) So I think the only way to cool the planet is to reflect more incoming radiation (less water vapor, less CO2, more airborne particles, more snow cover,...) or radiate away (Planck radiation, maybe lasers towards space)
Assuming that the solar irradiance you get on top of the atmosphere is 1360W/m2, 1 square meter worth of solar panel with 20% efficiency (e.g. the best SunPower crystalline silicon modules) would generate 270W of electricity.
Airbus claims that the A380 consumes 3l/100km.passenger of fuel. At Mach 0.85 (~250m/s at 10km altitude), this represents 27l/h.passenger.
Assuming 10kWh/l of fuel energy content and 50% efficiency of the turbofans (pulled out of my...), that amounts to 135kW of mechanical power needed for every single passenger.
Assuming an electrical motor with 100% efficiency, you would need 500m2 of solar panels for every passenger to generate the required electricity, but only during the day.
The plane from TFA seems to have 200m2 of solar panels with 12% efficiency. It can get away with it because it is much lighter and flights much slower.
Conclusion : The orders of magnitude just don't match, even with 100% efficiency => Commercial flights as we know them & photovoltaics are incompatible.
Next "Ask slashdot" : Can I fart hard enough to reach the moon?
We seem to get a "What to do with this useless crap I bought 2 years ago?" question every month. Don't buy it in the first place!
If you think you want to buy something, write it down in a "could_buy.txt" list. Take a look one month later, and more often than not, you'll ask yourself why you even considered it.
Only one of those 3 propositions is correct : * infinite growth is possible is a finite world * economics is a science * Duke Nukem Forever has been released
I might be a brilliant jerk at my company, but you appear to be an ignorant asshole with low IQ and a way too high self-esteem. I don't want your overrated rapid growth, I don't want to see your sloppy management methods mess with our team, and I don't want to end up in more meetings that I need to, especially if they're not on the technical side. Now, get off my lawn and go find another company to vampirize!
I already tried bootcamp once, and the install didn't work because of weird partitions. Now that I have a better motivation, I installed WinXP and : Black Mesa is simply glorious!:D
I realize : * this was a lot of work * it's free * mac isn't a gaming platform * I shouldn't complain
But I somehow thought that Black Mesa would run natively on mac since it uses Source. I've been very happy playing Portal/Counter Strike/Half Life 2 on my mac. Screw it, I might get a PC just to play Half Life again...
Judge : You'll be punished for your crimes. You'll get a 150€ fine. Defendant : 150 only? But I downloaded way more than that! Judge : You don't get fined for downloading, but for being stupid enough to get caught. 150€it is! And stop downloading, I mean, stop getting caught!
Look! Those glasses only use 0.1 Watt for computing, that's almost-zero-energy-we-re-gonna-save-the-world-with-our-super-green-glasses! Guess what? If those cool but kinda useless devices didn't exist yesterday, you didn't exactly save energy.
Slashdot Mirror
Hyperconsumerism FTW!
PS: You, sir, are an idiot.
For once that Fahrenheit unit is kinda useful, you could at least use it!
0F is more or less the coldest temperature you can achieve for a liquid mix of salt and water under standard pressure.
So it's entirely possible for a salt lake to have an average temperature of 9F.
Person A sends you an email.
You reply.
You forgot something, and reply again.
With Gmail, it will reply to A.
With Outlook, it will reply to yourself.
The broken solution is to use "Reply to all", which will only reply to A and not to yourself.
If you remove "Reply to all", please fix "Reply" first.
For some weird definitions of "green". ... that's about it.
Yes, they sort waste and have nice big photovoltaic plants on their roofs.
And
Otherwise, it's just big cars, bigger cars and more expensive cars with a nice "Atomkraft, nein Danke!" sticker.
It's also wind and solar electricity that is exported to Norwegian dams with imports mainly coming from French, Swiss and Check nukes.
It's also using escalators everywhere, and then paying 70€/month for the gym.
It's finally flying to Turkey/Mallorca/Bali for a week-end.
Sorry, that's just PR bullshit to me.
We're freakin' drug addicts :
we need our daily dose, and when our shady dealer doesn't play fair, we look beneath the couch.
We find some dirty old bag of crack, and scream "Yeah! We're saved! We solved our problem once and for all!"
Cisco has backdoors too
https://www.networkworld.com/community/node/57070
I find it beautiful, well polished, it works out of the box (with video codecs, mp3, java, flash, ...), it is well integrated, it supports interesting projects (mate & cinnamon) and is fully compatible with Ubuntu repositories and 95% of its documentation.
Also, releases bring mostly bug fixes or new features that you can safely ignore. If you find it easy to use LM 12, you won't have any problem using LM 13 or LM 14.
I suppose the biggest threat to the global oil supply is the fact that it's finite and that we burn 85 millions barrel a day.
Interesting proposition, but
The database is already full of false positives. Will they really care if they add a few more?
Oops, sorry! :D
I just misread "latitude" as "altitude".
It was an honest mistake : I was just trying to find bullshit in every single sentence
No. A 2-axis tracked CPV system with multi-junction cells will produce more with beam radiation than a 2-axis tracked monocrystalline PV system with global radiation, at least in the regions where CPV is installed (Spain, Israel, Arizona, ...).
Sure, it won't work well in Norway.
Diffuse fraction never falls below 16%. Even a clear, deep blue sky still emits diffuse radiation.
True, but we're probably talking 500:1 concentration, here.
33% has been measured under 850W/m2 direct radiation (nominal operating conditions). Compared to 1000W/m2 global radiation (STC), you get 15% less.
That's still about 28% of module efficiency. How many single-junction PV modules are there that deliver that much, even in laboratory? None.
You meant "high altitudes", right?
No ...) or radiate away (Planck radiation, maybe lasers towards space)
1) Every kind of energy will ultimately be converted to heat.
2) The Earth+Atmosphere system isn't closed, but the only way to change its global energy content is by getting more or less radiation from space.
3) So I think the only way to cool the planet is to reflect more incoming radiation (less water vapor, less CO2, more airborne particles, more snow cover,
Assuming that the solar irradiance you get on top of the atmosphere is 1360W/m2, 1 square meter worth of solar panel with 20% efficiency (e.g. the best SunPower crystalline silicon modules) would generate 270W of electricity.
Airbus claims that the A380 consumes 3l/100km.passenger of fuel. At Mach 0.85 (~250m/s at 10km altitude), this represents 27l/h.passenger.
Assuming 10kWh/l of fuel energy content and 50% efficiency of the turbofans (pulled out of my ...), that amounts to 135kW of mechanical power needed for every single passenger.
Assuming an electrical motor with 100% efficiency, you would need 500m2 of solar panels for every passenger to generate the required electricity, but only during the day.
The plane from TFA seems to have 200m2 of solar panels with 12% efficiency. It can get away with it because it is much lighter and flights much slower.
Conclusion : The orders of magnitude just don't match, even with 100% efficiency => Commercial flights as we know them & photovoltaics are incompatible.
Next "Ask slashdot" : Can I fart hard enough to reach the moon?
We seem to get a "What to do with this useless crap I bought 2 years ago?" question every month.
Don't buy it in the first place!
If you think you want to buy something, write it down in a "could_buy.txt" list.
Take a look one month later, and more often than not, you'll ask yourself why you even considered it.
Let's see, what about the fact that the whole civilized world is based on abundant and cheap oil?
Only one of those 3 propositions is correct :
* infinite growth is possible is a finite world
* economics is a science
* Duke Nukem Forever has been released
"Jailbait" is the word you're looking for.
Dear Cliff,
I might be a brilliant jerk at my company, but you appear to be an ignorant asshole with low IQ and a way too high self-esteem.
I don't want your overrated rapid growth, I don't want to see your sloppy management methods mess with our team, and I don't want to end up in more meetings that I need to, especially if they're not on the technical side.
Now, get off my lawn and go find another company to vampirize!
Fun fact : "clean energy" is an oxymoron.
"clean" means you leave a system the way it was.
"energy" means you change the state of the system.
Thanks!
I already tried bootcamp once, and the install didn't work because of weird partitions. :D
Now that I have a better motivation, I installed WinXP and :
Black Mesa is simply glorious!
I realize :
* this was a lot of work
* it's free
* mac isn't a gaming platform
* I shouldn't complain
But I somehow thought that Black Mesa would run natively on mac since it uses Source. I've been very happy playing Portal/Counter Strike/Half Life 2 on my mac.
Screw it, I might get a PC just to play Half Life again...
Yep, only 5 orders of magnitude are missing.
HADOPI cost 12M€ last year.
Source : http://vidberg.blog.lemonde.fr/2012/09/13/hadopi-la-premiere-condamnation/
Judge : You'll be punished for your crimes. You'll get a 150€ fine.
Defendant : 150 only? But I downloaded way more than that!
Judge : You don't get fined for downloading, but for being stupid enough to get caught. 150€it is! And stop downloading, I mean, stop getting caught!
Exactly my thought:
Look! Those glasses only use 0.1 Watt for computing, that's almost-zero-energy-we-re-gonna-save-the-world-with-our-super-green-glasses!
Guess what? If those cool but kinda useless devices didn't exist yesterday, you didn't exactly save energy.
OMFG, you're probably right. Can we mod this submission as troll?
Why would you upload and share your WoW screenshots anyway?