But the power flow is in the opposite direction - from the wind, via rotating sail (so it effectively tacks, with resistance to do that provided not by some keel but by the wheels), to the vehicle.
Describing it the way it's done is choosing a path of dumbing it down leading to the point of total confusion (similarly how some genius at one point suggested it's about differences in pressure with the wings, and many texbooks teach this falsehood ever since...)
All the energy there comes from the wind. The wheels act as keel, providing resistance against the surface. The propeller (rotating sail, really) is what tacks to the side (by rotating...but it doesn't make any difference from "to the side" as far as wind is concerned), so the whole vehicle doesn't have to and can move "forward", with the wind.
And this thing doesn't go directly downwind either, strictly speaking.
Sure, the vehicle as a whole does, in the end. But its sail tacks to the side (via rotation, not by moving the whole vehicle to the side...but what is the difference from the point of view of the wind?)
Yeah - sail, propeller, wing...not much of a difference.
But your explenation can be made simpler, I believe. Look at a boat that tackles downwind - that's when greatest speeds are achieved, when highest levels of energy can be extracted from the wind by using resistance of the surface to redirect the greatest mass of the incoming air; it's moving "sideways" to achieve just that.
Well, that propeller does it, too. Sure, the movement is rotary...but from the point of view of the wind there's no difference! (like there's really no difference between fixed wings and "rotating wings" in a helicopter)
Well, the usual (and too often found in textbooks:/ ) "it's about inducing differences in pressure" explanations of aerofoils (and sail or propeller is just that) aren't really correct, they aren't enough to explain the efficiency.
Yes, when in the simplest mode of travelling downwind, with wind "hitting the sail on one side and not the other" that's what happens - but it's not the most efficient way; othwerwise speed records wouldn't be done when tacking. I guess it's accurate to say that's what this setup does - causes the propeller (another sail, really) to move in such a way that it acts, relative to the wind, as a sailboat tacking downwind. Instead of the whole vehicle doing that (using resistance of the surface), only part of it does (using...resistance of the surface)
Seems it's sensible to look at the propeller as another sail (sail, wing, propeller...there's little difference anyway - a long time ago I was able to instantly, if clumsily, sail a boat quite properly by applying the basic knowledge of aerodynamics; at the same time my peers were trying to "feel" how one should "catch the wind") which is moved in such a way that it acts, relative to the wind, as a sailboat that's tacking downwind (the scenario in which speed records are achieved). Instead of the whole vehicle doing that tacking (using resistance of the surface), only part of it does (using...resistance of the surface)
Don't look at the propeller as some magical system extracting more of the energy that's already captured by the vehicle.
Instead, look at it as another sail (sail, wing, propeller...there's little difference really - a long time ago I was able to instantly, if clumsily, sail a boat quite properly by applying the basic knowledge of aerodynamics; at the same time my peers were trying to "feel" how one should "catch the wind") which is moved in such a way that it acts, relative to the wind, as a sailboat that's tacking downwind. Instead of the whole vehicle doing that tacking (using resistance of the surface), only part of it does (using...resistance of the surface)
PS. Wait, I take it back - I checked the website of the mentioned provider owned by T-mobile; and, since I did so the last time, this one quite recent "family network" offer showed up (easily found; new & promoted) - one which is even better than from T-mobile US; one which is exactly what I wanted (a prepaid account can participate in "family network" and gets huge credit (that might be actually better than "unlimited";p ) for calling with said network) Oh well, it's getting better and better...
Pretty close, yeah - though I really do think that setting the credit limit for "extra" usage (the one except "always allow") should be via classic prepaid mechanism; a hybrid kind of account, basically. If the kid needs to cover that part from own general funds, it's beneficial IMHO on several levels.
Anyway, this service is not available at my place...even though I have a provider that is for a long time fully owned by T-mobile (and reasonably integrated with them)
It can start small, just approximations. Say, an underlying gouraud shaded model, "visible" (normally quite dark) through transparent parts (of main textures) showing some "net" of structural borders and/or ports; when under heavy attack - lighting up a bit (gouraud...PS1 was doing it easily) in one of few predetermined fashions / sequences, representing waves of destruction expanding throughout the structure. Coupled with dozen particles spewing out of some predetermined locations; quickly lighting down and with damn easy movement ("go straight with constant speed"). The superstructure being really a few parts (predetermined...so what? Such massive objects would break down always in similar ways anyway) would not add many polygons, the movement is again easy and...large ships don't explode all that often (and when they do, attackers might just as well stop shooting, preserving gfx resources)
I have a hard time believing its not firmly in the area of technical possibilities available for some time. But...wobble?! Whose idea was that? Homeworld was better - a game from 12 years ago, I believe; sure, the effects generally were comparably arbitrary, but at least there was no wobble!
Android is catching up fast there, too. Generally, the rule for Apple is that they end up with quite small market share especially/specifically when looking worldwide.
Did they got rid of wobbling? I'm somehow reluctant to turn those videos on otherwise.
Really, this was one thing destroying the immersion for me, when I watched EVE videos the last time - really nice views generally, but eventually some massive object showing up that inevitably wobbles when hit, when it couldn't possibly wobble like that. If you want to, have in the close-up view a visible blastwave going through the structure (could be merely approximate), jets of plasma and debris through ports of presumably damaged sections, the structure fragmenting into parts which float away. But-please-no-wobbling.
No need for RTGs. More generally, what you describe is a function of people getting wooed by "sexy" and forgetting about also looking at battery life when making their choice. Well, TBH I can almost see this new Intel "smartphone Atom" to be reasonably popular in such environment...
The last two are smarthpones. Yes, those are largely best case scenarios, but they are easily felt in daily usage. Their touchscreen devices aren't that bad, either; so it seems some manufacturers do care.
You surely need to work hard with software to make sure it exploits the possibilites of power savings given by hardware...but it's not the same as "thats all in the software"
Well, it does have at least very close underlying OS, similar libs used for usermode apps, etc. Does not make it full OSX of course; is not that different from what Android or, especially, MeeGo do.
Plus that's certainly not the best of deals around here - what about 4GiB for EU12, prepaid, recharge like this valid for two months, and with remaining data credit not lost if you recharge the account again before that 2-month cutoff point?
Still, some places manage to get better deals. Some (usually those needing it the most & with not great ability to afford many things) - much worse...and BTW those are primary the ones where great progress in avaiting to unfold thanks to, eventualy, cheap & easy means of communication. However we like to bitch about costs of internet connection, they aren't exactly limiting to us; many people aren't that fortunate.
PS. Keeping with the spirit of "I want a pony" of this discussion - would be nice to have a "child account" for, well, kids; one which covers communication with few selected numbers but works like prepaid for the rest (without limiting communication with few selected numbers once prepaid credit runs off)
Hard to overcome - no, of course not. But Nvidia hasn't done so; and you can't expect device manufacturers to make the effort (if Nv would even allow it...) while they can just take some ready, integrated solution.
As for other reasons, who knows. My personal impression from the first Tegra was that it's a bit unballanced - having powerful GFX and quite ancient ARM cores in the time when much better ones were already on the market (and trying to hide it with the hype of "everything will be accelerated by GPU"). Now maybe OEMs just don't like the rules of Nv...
Tegra doesn't have radio interface built-in, right? Well, that's its huge inferiority right there; and probably the main reason why it doesn't show up in any smartphones.
Slashdot Mirror
But the power flow is in the opposite direction - from the wind, via rotating sail (so it effectively tacks, with resistance to do that provided not by some keel but by the wheels), to the vehicle.
Describing it the way it's done is choosing a path of dumbing it down leading to the point of total confusion (similarly how some genius at one point suggested it's about differences in pressure with the wings, and many texbooks teach this falsehood ever since...)
All the energy there comes from the wind. The wheels act as keel, providing resistance against the surface. The propeller (rotating sail, really) is what tacks to the side (by rotating...but it doesn't make any difference from "to the side" as far as wind is concerned), so the whole vehicle doesn't have to and can move "forward", with the wind.
And this thing doesn't go directly downwind either, strictly speaking.
Sure, the vehicle as a whole does, in the end. But its sail tacks to the side (via rotation, not by moving the whole vehicle to the side...but what is the difference from the point of view of the wind?)
Yeah - sail, propeller, wing...not much of a difference.
But your explenation can be made simpler, I believe. Look at a boat that tackles downwind - that's when greatest speeds are achieved, when highest levels of energy can be extracted from the wind by using resistance of the surface to redirect the greatest mass of the incoming air; it's moving "sideways" to achieve just that.
Well, that propeller does it, too. Sure, the movement is rotary...but from the point of view of the wind there's no difference! (like there's really no difference between fixed wings and "rotating wings" in a helicopter)
Well, the usual (and too often found in textbooks :/ ) "it's about inducing differences in pressure" explanations of aerofoils (and sail or propeller is just that) aren't really correct, they aren't enough to explain the efficiency.
Yes, when in the simplest mode of travelling downwind, with wind "hitting the sail on one side and not the other" that's what happens - but it's not the most efficient way; othwerwise speed records wouldn't be done when tacking. I guess it's accurate to say that's what this setup does - causes the propeller (another sail, really) to move in such a way that it acts, relative to the wind, as a sailboat tacking downwind. Instead of the whole vehicle doing that (using resistance of the surface), only part of it does (using...resistance of the surface)
Seems it's sensible to look at the propeller as another sail (sail, wing, propeller...there's little difference anyway - a long time ago I was able to instantly, if clumsily, sail a boat quite properly by applying the basic knowledge of aerodynamics; at the same time my peers were trying to "feel" how one should "catch the wind") which is moved in such a way that it acts, relative to the wind, as a sailboat that's tacking downwind (the scenario in which speed records are achieved). Instead of the whole vehicle doing that tacking (using resistance of the surface), only part of it does (using...resistance of the surface)
Don't look at the propeller as some magical system extracting more of the energy that's already captured by the vehicle.
Instead, look at it as another sail (sail, wing, propeller...there's little difference really - a long time ago I was able to instantly, if clumsily, sail a boat quite properly by applying the basic knowledge of aerodynamics; at the same time my peers were trying to "feel" how one should "catch the wind") which is moved in such a way that it acts, relative to the wind, as a sailboat that's tacking downwind. Instead of the whole vehicle doing that tacking (using resistance of the surface), only part of it does (using...resistance of the surface)
I was thinking more about the "shake" of gargantuan vessels...
PS. Wait, I take it back - I checked the website of the mentioned provider owned by T-mobile; and, since I did so the last time, this one quite recent "family network" offer showed up (easily found; new & promoted) - one which is even better than from T-mobile US; one which is exactly what I wanted (a prepaid account can participate in "family network" and gets huge credit (that might be actually better than "unlimited" ;p ) for calling with said network)
Oh well, it's getting better and better...
Pretty close, yeah - though I really do think that setting the credit limit for "extra" usage (the one except "always allow") should be via classic prepaid mechanism; a hybrid kind of account, basically. If the kid needs to cover that part from own general funds, it's beneficial IMHO on several levels.
Anyway, this service is not available at my place...even though I have a provider that is for a long time fully owned by T-mobile (and reasonably integrated with them)
Free is inexpensive, don't you think?
(nvm that not all software has to be explicitly free)
It can start small, just approximations. Say, an underlying gouraud shaded model, "visible" (normally quite dark) through transparent parts (of main textures) showing some "net" of structural borders and/or ports; when under heavy attack - lighting up a bit (gouraud...PS1 was doing it easily) in one of few predetermined fashions / sequences, representing waves of destruction expanding throughout the structure. Coupled with dozen particles spewing out of some predetermined locations; quickly lighting down and with damn easy movement ("go straight with constant speed"). The superstructure being really a few parts (predetermined...so what? Such massive objects would break down always in similar ways anyway) would not add many polygons, the movement is again easy and...large ships don't explode all that often (and when they do, attackers might just as well stop shooting, preserving gfx resources)
I have a hard time believing its not firmly in the area of technical possibilities available for some time. But...wobble?! Whose idea was that? Homeworld was better - a game from 12 years ago, I believe; sure, the effects generally were comparably arbitrary, but at least there was no wobble!
Android is catching up fast there, too. Generally, the rule for Apple is that they end up with quite small market share especially/specifically when looking worldwide.
I put on my robe and wizard hat...
Did they got rid of wobbling? I'm somehow reluctant to turn those videos on otherwise.
Really, this was one thing destroying the immersion for me, when I watched EVE videos the last time - really nice views generally, but eventually some massive object showing up that inevitably wobbles when hit, when it couldn't possibly wobble like that. If you want to, have in the close-up view a visible blastwave going through the structure (could be merely approximate), jets of plasma and debris through ports of presumably damaged sections, the structure fragmenting into parts which float away. But-please-no-wobbling.
No need for RTGs. More generally, what you describe is a function of people getting wooed by "sexy" and forgetting about also looking at battery life when making their choice.
Well, TBH I can almost see this new Intel "smartphone Atom" to be reasonably popular in such environment...
Well...
"standby battery time of up to six weeks" , and that seems cautious considering the specs say "up to 48 days", which would be just below 7 weeks (talk time "up to 13h" there, so realistically 10 probably) ... standby 26 days between charges"
"up to 12 hours talktime (GSM)
"18 hours and 30 minutes talk time (in GSM mode). 29 days standby time"
The last two are smarthpones. Yes, those are largely best case scenarios, but they are easily felt in daily usage. Their touchscreen devices aren't that bad, either; so it seems some manufacturers do care.
You surely need to work hard with software to make sure it exploits the possibilites of power savings given by hardware...but it's not the same as "thats all in the software"
Well, it does have at least very close underlying OS, similar libs used for usermode apps, etc. Does not make it full OSX of course; is not that different from what Android or, especially, MeeGo do.
Things that pass nowadays as "great battery life", ehh...
Plus that's certainly not the best of deals around here - what about 4GiB for EU12, prepaid, recharge like this valid for two months, and with remaining data credit not lost if you recharge the account again before that 2-month cutoff point?
Still, some places manage to get better deals. Some (usually those needing it the most & with not great ability to afford many things) - much worse...and BTW those are primary the ones where great progress in avaiting to unfold thanks to, eventualy, cheap & easy means of communication. However we like to bitch about costs of internet connection, they aren't exactly limiting to us; many people aren't that fortunate.
PS. Keeping with the spirit of "I want a pony" of this discussion - would be nice to have a "child account" for, well, kids; one which covers communication with few selected numbers but works like prepaid for the rest (without limiting communication with few selected numbers once prepaid credit runs off)
Hard to overcome - no, of course not. But Nvidia hasn't done so; and you can't expect device manufacturers to make the effort (if Nv would even allow it...) while they can just take some ready, integrated solution.
As for other reasons, who knows. My personal impression from the first Tegra was that it's a bit unballanced - having powerful GFX and quite ancient ARM cores in the time when much better ones were already on the market (and trying to hide it with the hype of "everything will be accelerated by GPU"). Now maybe OEMs just don't like the rules of Nv...
Well, not exactly "the other way around" - hardware should be inexpensive, and software too. All things considered, we're getting there.
Tegra doesn't have radio interface built-in, right? Well, that's its huge inferiority right there; and probably the main reason why it doesn't show up in any smartphones.