problems i have had
Math ML interpretation is screwed (though at least the math editor is typed but why couldn't they used a more acceptable syntax)
no cross referencing or labels!
shitty formatting errors when opening docx but this is because of their shitty "open" proprietary format (the world would be a much better place if M$bullshit had a smaller market share so we didn't have to put up with doc format problems again, its just a document format you fucktartds!). I seem to remember docx is an iso standard or something but only through heavy lobbying by M$, they half publish the standard so Oo cant interpret it. Even go0gle docs has a hard time with that pice of sh**.
I just wip out the LaTeX instead, ahh that's better anyone can reed a.tex file or a pdf.
also WTF is silver-light is it one of those vampire movies?
day toook ooowwrrrr joooobbbssss!!
they tooook oooour joooobs.
space shuttle is not needed as the cold war ended 20 years ago! its expensive, and dose not compete with modern launchers. lets face it materials cost isn't the biggest cost of a launcher, its fuel and development, so why bother making the launcher reusable? also why bother sending up a crew of 7 and all the life support that requires?
Thease people are highly skiled and no doubt will end up working for some other engineering company in the future, hey maybe one of the commercial space rocket manufacturers. There redundancy may even lead to better prospects in-the future. NASA is scaling back, as it shouldn't be manufacturing what it can get commercial, (this is the states right free market and all that BS), They need to concentrate on the next generation of space vehicles.
so i agree, NASA isnt state well fair!
Its like the certain politicians sticking there fucking ore in and telling NASA to use XYZ manufacture because Its in there constituency, And hey sure we have to bail out GM (would totaly been better if it got bout out by toyota or someone).
gas turbines are more efficient than petrol or diesel or engines, as the joule cycle is more thermodynamically ideal. The only problem is they prefer to operate at a continuous power output. Rover tried doing this in the 30's with Whittle's jet, but that was a disaster, the advances in electrical drive trains may have fixed this.
still its pretty cool.
The correct equation for modern jet aircraft operating in the cruse climb regime is the Breguet range equation. http://en.wikipedia.org/wiki/Range_(aircraft)#Cruise.2FClimb.
modem airframes are designed to fly at a specific Mach number and angle of attack (maintaining a constant C_L) so to get the highest Lift to drag ratio L/D this is about 20 for aircraft such as the A380 and 18 for a 747.
now from the range equation you can see that the available range scales with the speed M.
the problem for a transonic airliner is that as M approaches 1 there is a significant drag rise http://en.wikipedia.org/wiki/Drag_(physics)#Wave_drag_in_transonic_and_supersonic_flow, significantly reducing the lift to drag ratio.
These airframes however are designed to take advantage of a boost in lift (the coefficient of) associated with the supersonic flow over the front part of the wing, and the increased M to maximise ML/D just slightly beyond the drag rise Mach number. M = 0.85 for Airbus and 0.9 for Boeing, i think Boeing picks a faster but slightly less aerodynamically favourable speed (burns a bit more fuel for the range) as costumers also have to consider the leas costs of the airframe being in the air, i.e. it pays to be a bit quicker.
Supersonic airframes on the other hand have much lower L/D ~10 for concord but then M=2.2 so ML/D is comparable to the transonic airline, and these planes can be just as efficient in terms of fuel per passenger mile (and the jets are more efficient to) this is another neach speed for passenger transport, however the development costs (especially concord with only being able to test in the wind tunnel, no cfd in the 70s) and other complexities (The FAA) can make this uneconomic.
in this case, MIT, we have another aircraft configuration in which M=0.7 so L/D must be greater than 29 to be competitive. As they state that they are burning 70% less fuel then L/D must be quite a lot bigger. as i gues the best L/D is achieved by sports gliders at about 60, then they must also be speculatively factoring in lighter materials, and improved engine efficiency for the improved fuel burn, (technologies which transonic aircraft would benefit from to).
finally I have my doubts about Boundary layer ingesting engines. the engines them selves will have to burn more fuel to accelerate stagnant flow at the back of the aircraft to slightly more than the velocity of the aircraft in the opposite direction. the delta v across the engine will be bigger than in the normal case. The only advantage is that propulsive efficiency of the engine is improved because by filling in the wake of the aircraft with the jet you reduce kinetic energy losses. see http://en.wikipedia.org/wiki/Propulsive_efficiency#Jet_engines. However there are massive headaches for the first stage compressors of such a jet engine (the velocity profile is uneven and turbulent on the rotor, which will course stalling and surging and a reduced operating range), as noted and I doubt this will be worked out.
I have UNR 10.04 on my acer one (atom N270) it takes 25 seconds to boot to the login screen plus a further 5 seconds to login, 9 seconds of that were spent before the grub had loaded.
only problem now is the shut down time is like 30 seconds just wasting my time...
only issue i have with canonical is they locked the panel in UNR so you cant add applets!
641% wow man.. thats a lot of growth, if they could keep that up the number of netbooks in the market doubles roughly every month, it would only take just under 3 years for the entire population of the world to have a net-book (starting with 1 net-book at the 1st month)
isn't it more likely that the net book market has saturated itself. I find it hard to understand how people can compare these two different product types,
these tablets don't even have keyboards, and cost at least 2wice as much.
enough already with this apple out to conquer the world hogwash
don't believe the hype
"proliferation of cruise missiles to anyone who will pay for them"
these things can be made in back of the garage as this guy tried to prove
http://www.interestingprojects.com/cruisemissile/diary.shtml
I think rogue states/ terrorists could do the same, given they have funding ect.
so apart from all the comments on gramma from the gramma natzies can anyone explain why it is or is not a hyper-visor
Re:Flying Cars Energy Hogs By Nature
on
At Last, Flying Cars?
·
· Score: 1, Informative
That's a bit rich comparing a Cessna c1950 to a Honda accord c2009. Try something more contemporary aircraft like a Grob. The old Rolls Royce continental engines Cessna's use aren't exactly what you would call efficient. where as Honda and a lot of other care manufacturers have been under pressure to make large strives for fuel efficiency!
anyway I am going of topic on a rather boring bit of news, I was actually expecting a physical item, like the DARPA bigdog http://www.youtube.com/watch?v=VXJZVZFRFJc&feature=related , instead of some imaginary car that some very interesting, and generic research will be based around.
also they have to "bind with iridium oxide and a biological pigment zinc porphyrins" which aren't available naturally, and the virus cannot produce. the viruses are just being used as scaffolds for the active ingredients, the catalyst, and the pigment (light absorber).
I am pretty sure that turning the ignition key off would remove the power on most petrol cars, and thus reduce the acceleration, diesels are a bit different, and also if the brakes/steering are electrically actuated then your a bit screwed, but these things have mechanical backups right?
you know in most industries a nice hefty push button kill switch is located somewhere convenient, in-case things go a bit pair shaped.
Slashdot Mirror
problems i have had Math ML interpretation is screwed (though at least the math editor is typed but why couldn't they used a more acceptable syntax) no cross referencing or labels! shitty formatting errors when opening docx but this is because of their shitty "open" proprietary format (the world would be a much better place if M$bullshit had a smaller market share so we didn't have to put up with doc format problems again, its just a document format you fucktartds!). I seem to remember docx is an iso standard or something but only through heavy lobbying by M$, they half publish the standard so Oo cant interpret it. Even go0gle docs has a hard time with that pice of sh**. I just wip out the LaTeX instead, ahh that's better anyone can reed a .tex file or a pdf.
also WTF is silver-light is it one of those vampire movies?
day toook ooowwrrrr joooobbbssss!! they tooook oooour joooobs. space shuttle is not needed as the cold war ended 20 years ago! its expensive, and dose not compete with modern launchers. lets face it materials cost isn't the biggest cost of a launcher, its fuel and development, so why bother making the launcher reusable? also why bother sending up a crew of 7 and all the life support that requires? Thease people are highly skiled and no doubt will end up working for some other engineering company in the future, hey maybe one of the commercial space rocket manufacturers. There redundancy may even lead to better prospects in-the future. NASA is scaling back, as it shouldn't be manufacturing what it can get commercial, (this is the states right free market and all that BS), They need to concentrate on the next generation of space vehicles. so i agree, NASA isnt state well fair! Its like the certain politicians sticking there fucking ore in and telling NASA to use XYZ manufacture because Its in there constituency, And hey sure we have to bail out GM (would totaly been better if it got bout out by toyota or someone).
gas turbines are more efficient than petrol or diesel or engines, as the joule cycle is more thermodynamically ideal. The only problem is they prefer to operate at a continuous power output. Rover tried doing this in the 30's with Whittle's jet, but that was a disaster, the advances in electrical drive trains may have fixed this. still its pretty cool.
FAAAAAAAKEEE!!!
massive bandwidth poor latency yada yada next PR stunt please!
except they haven't defended its common use I draw your attention to http://en.wikipedia.org/wiki/Jedi_census_phenomenon#England_and_Wales and http://www.jedichurch.org/ which would suggest Lucas arts can no-longer clam Jedi unless it were to sue those groups as well
not at £140m a pop
thats no moon
you mean O-<-<
the issues of running firefox on a SSD(i.e. netbook) have bee well addressed: https://help.ubuntu.com/community/AspireOne/110L#Speed%20up%20Firefox
you just have to get your hands a little dirty
what specific design choices in chrome makes it faster than Firefox, i.e. what caching/ database ect
TFA says notebook, i.e. a laptop, (but don't put it on your lap or you'll sterilise your little solders with the heat)
a netbook is the small cheap low power device which you are thinking of.
this is a subtle distinction to do with marketing
The correct equation for modern jet aircraft operating in the cruse climb regime is the Breguet range equation. http://en.wikipedia.org/wiki/Range_(aircraft)#Cruise.2FClimb. modem airframes are designed to fly at a specific Mach number and angle of attack (maintaining a constant C_L) so to get the highest Lift to drag ratio L/D this is about 20 for aircraft such as the A380 and 18 for a 747. now from the range equation you can see that the available range scales with the speed M. the problem for a transonic airliner is that as M approaches 1 there is a significant drag rise http://en.wikipedia.org/wiki/Drag_(physics)#Wave_drag_in_transonic_and_supersonic_flow, significantly reducing the lift to drag ratio. These airframes however are designed to take advantage of a boost in lift (the coefficient of) associated with the supersonic flow over the front part of the wing, and the increased M to maximise ML/D just slightly beyond the drag rise Mach number. M = 0.85 for Airbus and 0.9 for Boeing, i think Boeing picks a faster but slightly less aerodynamically favourable speed (burns a bit more fuel for the range) as costumers also have to consider the leas costs of the airframe being in the air, i.e. it pays to be a bit quicker. Supersonic airframes on the other hand have much lower L/D ~10 for concord but then M=2.2 so ML/D is comparable to the transonic airline, and these planes can be just as efficient in terms of fuel per passenger mile (and the jets are more efficient to) this is another neach speed for passenger transport, however the development costs (especially concord with only being able to test in the wind tunnel, no cfd in the 70s) and other complexities (The FAA) can make this uneconomic. in this case, MIT, we have another aircraft configuration in which M=0.7 so L/D must be greater than 29 to be competitive. As they state that they are burning 70% less fuel then L/D must be quite a lot bigger. as i gues the best L/D is achieved by sports gliders at about 60, then they must also be speculatively factoring in lighter materials, and improved engine efficiency for the improved fuel burn, (technologies which transonic aircraft would benefit from to). finally I have my doubts about Boundary layer ingesting engines. the engines them selves will have to burn more fuel to accelerate stagnant flow at the back of the aircraft to slightly more than the velocity of the aircraft in the opposite direction. the delta v across the engine will be bigger than in the normal case. The only advantage is that propulsive efficiency of the engine is improved because by filling in the wake of the aircraft with the jet you reduce kinetic energy losses. see http://en.wikipedia.org/wiki/Propulsive_efficiency#Jet_engines. However there are massive headaches for the first stage compressors of such a jet engine (the velocity profile is uneven and turbulent on the rotor, which will course stalling and surging and a reduced operating range), as noted and I doubt this will be worked out.
http://hackaday.com/2010/05/11/ps3-patch-allows-linux-installation/
I have UNR 10.04 on my acer one (atom N270) it takes 25 seconds to boot to the login screen plus a further 5 seconds to login, 9 seconds of that were spent before the grub had loaded. only problem now is the shut down time is like 30 seconds just wasting my time... only issue i have with canonical is they locked the panel in UNR so you cant add applets!
sorry L4 and L5 collect dust and asteroids http://en.wikipedia.org/wiki/Lagrangian_point#L4_and_L5
there are a few asteroids at L2 and L3 I think, but that's a long way off
641% wow man.. thats a lot of growth, if they could keep that up the number of netbooks in the market doubles roughly every month, it would only take just under 3 years for the entire population of the world to have a net-book (starting with 1 net-book at the 1st month) isn't it more likely that the net book market has saturated itself. I find it hard to understand how people can compare these two different product types, these tablets don't even have keyboards, and cost at least 2wice as much. enough already with this apple out to conquer the world hogwash don't believe the hype
thats a cool plugin I never new about before, thanks slash dot I have now wasted a few hours of my life playing with the gimp,
"proliferation of cruise missiles to anyone who will pay for them" these things can be made in back of the garage as this guy tried to prove http://www.interestingprojects.com/cruisemissile/diary.shtml I think rogue states/ terrorists could do the same, given they have funding ect.
so apart from all the comments on gramma from the gramma natzies can anyone explain why it is or is not a hyper-visor
That's a bit rich comparing a Cessna c1950 to a Honda accord c2009. Try something more contemporary aircraft like a Grob. The old Rolls Royce continental engines Cessna's use aren't exactly what you would call efficient. where as Honda and a lot of other care manufacturers have been under pressure to make large strives for fuel efficiency! anyway I am going of topic on a rather boring bit of news, I was actually expecting a physical item, like the DARPA bigdog http://www.youtube.com/watch?v=VXJZVZFRFJc&feature=related , instead of some imaginary car that some very interesting, and generic research will be based around.
also they have to "bind with iridium oxide and a biological pigment zinc porphyrins" which aren't available naturally, and the virus cannot produce. the viruses are just being used as scaffolds for the active ingredients, the catalyst, and the pigment (light absorber).
ah so your a fascist then
we'll have to nuke it from orbit, its the only way to be sure
I am pretty sure that turning the ignition key off would remove the power on most petrol cars, and thus reduce the acceleration, diesels are a bit different, and also if the brakes/steering are electrically actuated then your a bit screwed, but these things have mechanical backups right? you know in most industries a nice hefty push button kill switch is located somewhere convenient, in-case things go a bit pair shaped.