/sci/ - Science & Math

>>5510901
>Thrust without ejecting mass?
It's ejecting energy, which is the same thing.

>>5510901

beats lugging fuel around though

>>5510935

Basically, as soon as we have proper fusion reactors, then we can roam the solar system at decent speeds...

I hate how these things never work out. Either:
A) He's wrong and the premis is false
B) We'll run into an unavoidable constraining factor later that will make it useless as anything but a proof of concept
C) it'll get virtually no support from anyone, he won't have the funds to attempt it large-scale, and then he'll die and nobody will know about it.

Always happens.

>>5510957
so i guess we will never reach star trek, halo level sci fi but Firefly sci fi might just be possible?

>>5510957

*Zeta Pinch Fusion Reactors

Fixed for ya anon

Well the first paper in that article was apparently never debunked beyond "no you're wrong." So that's cool.

And the second paper claims to have refined the first's experiment and increased the thrust of the engine.

Even if it is a miniscule amount of thrust, in space, you just keep accelerating. This'd be a great way to get to far away planets.

>>5510999

>http://lmgtfy.com/?q=Alcubierre+drive
LMGTFY used unironicaly for once in its existance

Nasa has started concept testing after a dramatic redesign so it now only requires the entire power out put of the united states rather than all the energy in the universe and then some.

>Shawyer says that the Q value, and hence thrust, can be boosted by a factor of several thousand -- producing perhaps a tonne of thrust per kilowatt of power. Suddenly it's not about giving a satellite a slight nudge, it's about launching spacecraft.

DO WANT.

>none of this will become reality in our lifetimes
>it will be nothing but more social media bullshit and better smartphones or tablets for the next 50 years

>>5510976
one space dust will wreck and explode the ship.. try to engineer around that with your energy

>>5511090
I wish I could invest in some of this next gen tech and become rich.. does anyone have any idea ho to invest in Graphene?

>>5511112
you should have invested in 3d printing stocks those went up like crazy. I head there is a company that is doing stuff with graphene and nanotubes, but they said the demand is still in the early stages called CVV stock symbol, then again that might be the best time to get in before it goes up like 3d printers

>>5511106
put a big wall in front of the craft

>thrust without ejecting mass is the reason people are sayign this won't work.
are people thick? Who are these skeptics and have they even completed highschool physics?

Energy IS mass and this device obviously uses energy.
It sounds really interesting. With the recent advances in superconductor technology thios should be a very viable technology in a few years.

>>5510999
>has never heard of the Alcubierre drive.

We are actually closer to creating a working warp drive than cold fusion. Both need a lot more technology to work first.

A working micro warp field generator is currently being tested at NASA

http://en.wikipedia.org/wiki/Alcubierre_drive
http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20110015936_2011016932.pdf
http://io9.com/5963263/how-nasa-will-build-its-very-first-warp-drive
http://en.wikipedia.org/wiki/White%E2%80%93Juday_warp-field_interferometer

>NASA testing working mini-warp bubble device
>graphene, the universe's current strongest material, is now able to be manufactured ciommercially.
>a new type of matetr has been created, bringing a new type of magnetism which can be used in super data storage and high temp superconducting.
>scientists have made a working mini- traktor beam
>scientists have just begun to completely synthesize organs effectively.
2 companies are now building the craft to mine asteroids

the fuck is going on?

>>5511185
we future now.

I wish I had money to invest in these kind of things and that I wasn't poor as shit.

Fucking rich-fags can invest and get richer.

>>5511185

Prepare yourself.

>>5511212

I never asked for this.

>>5511212
I wonder if we will ever get to the point where people will actually consider chopping off their arms so they can use prosthetic ones.

>>5511287
If the technology existed (and there wasn't drama-creating plot bullshit like "Neuropazyne") I'd do that right now.
As long as we could make augmentations appear sleek and "organic" looking people would quickly get used to it.

>>5511287

I watched a documentary based around the manufacturing of prosthesis. The designer of these prosthesis had been born with several missing limbs. When asked by the interviewer if he wished he had been born with these limbs he responded "What for? My prosthetic limbs won't get old or frail. In fact every year I make better stronger and faster limbs."

Gets you wondering if people would actually 'upgrade' their body. Some things already perform better. For example Paralympic runners can run 100m faster than Olympians.

A photon still has momentum.

>>5511323
That example doesn't really matter though seeing as a) He has never known what it is like to have the actual natural version of those limbs and b) denial/coping
If we had deus ex style prosthetics I might be more inclined to believe him.

I don't see how this works. Does it eject photons for propulsion?

>>5511180
>>5511026

>requires negative mass

negative mass is a theory

>>5511367
>negative mass is a hypothesis

>>5511367
While correct in terms of negative mass requirement, this is the narrow minded General relativity view of things.
String theory allows for non-negative mass expansion of spacetime.

also negative mass is the most bog standardly simple way of ahchieving the expansion of spacetime. there are currently techniques that don't involve mass directly to create gravitational fields. I'm sure there will crop up a few ways to generate a negative gravitational field in some way.

but I'm more inclined to think string theory holds that key.

>>5511350

Eventually, we will. Each iteration of prosthetic is better than the previous. Just like with computers and algorithms.
If I had to put a time frame on it, 2027 is somewhat optimistic but certainly by the mid 2030s. The main driver behind this is the US military. Its poured billions into replacement limbs for soldiers and it will filter out into general use. Same happened with GPS; initially military only and now its ubiquitous.

>>5511212
I spill my drink!

>>5511287

I'll hold onto my real arms for as long as reasonable and get the mk3 ultra version

>>5511438
Sorry, the Mk.3 Ultra was highly anticipated and all units were sold pre-ordered.

And now the company went belly-up. Even the Mk.3 Standard and Mk.2 Deluxe are unavailable now.

But no worries, there's still plenty of the following products:
Tai Yong Medical Mk.9 Cheapknockoff
Russian Arms Mk.X RustySqueaky
Ingram-Decker Mk.6 TooExpensiveForAnyone

>>5511438

>hold onto my real arms

icwutudidthar

>>5511401
> not posting this

http://www.youtube.com/watch?v=_qUPnnROxvY

>>5510957

Nothing but pipe dreams.

Fission will do the job now, fusion may at worst, never do it and assuming it will, the time it takes for it to become useful for space applications is unacceptable. What may be the most imporant thing for the mankind cannot be afforded to be slowed down by people like you waiting for pipe dreams to become reality.

>>5511460
YOU are a pipedream.
Now begone with thee.

>>5510957

Nothing but pipe dreams.

Fission will do the job now, fusion may at worst never do it. Assuming it will, the time it takes for it to become useful for space applications is unacceptable. What may be the most important thing for the mankind cannot be afforded to be slowed down by people like you waiting for pipe dreams to become reality.

>a pulse of light can even have a group velocity which is greater than the speed of light
stopped reading there, as any scientist concerned with their time would.

>>5511488

Um, you can't possibly be that retarded, right?

Hint: Figure out omega in an ionized plasma

>>5511488
dumbass.

>>5510901
wasn't this whole thing disproven? i read the original paper and IIRC the group velocity was used in calculations it cant be used.

>>5510901
>Related features
>Cold fusion: smoke and mirrors, or raising a head of steam?
>What to make of Andrea Rossi's apparent cold fusion success
>Jet cars and secret weapons: the 'impossible' Emdrive
>Success for Andrea Rossi's E-Cat cold fusion system, but mysteries remain

since when is wired a pseudoscience news site?

>>China

Instantly suspicious. I can't even remember the last time they made something new that wasn't a copy of someone else's design.

>>5511294
>>drama-creating plot bullshit

Oh you mean like immunosuppressants for people with organ tr- OH WAIT

>>5511445

>>5511544
>immunosuppressants
You don't need immunosupressants for mechanical prostethics, only foreign organs.

>>5511294

The cantilever lower-leg replacements look pretty awesome and I'd just about do it now simply to run a bit faster and be able to leap in the air like so

>Shawyer built a demonstration thruster to test the theory in 2003. The thrust was tiny -- 16 mN, equal to the weight of a couple of peanuts -- but enough to validate the concept. However, sceptics were quick to attack. None of them actually inspected the apparatus, but Shawyer was assailed from all sides online and in the science press. Criticism was unsophisticated: Newton said it was impossible, therefore he must be a fraud. Even the most advanced theoretical critique, produced by John Costella, a PhD in relativistic electrodynamics, amounted to arguing about the direction of an arrow on one of Shawyer's diagrams.

So wait, none of the critics even looked at the paper or the experiment? Is that really what modern academia has been reduced to? Experimental evidence should be given a fair shake, shouldn't it?

>>5512443
experimental evidence not open for reproduction is called an "anecdote."

>>5511445
Still it's just controllable by muscles in the stub. To get anything actually useful you have to integrate with the nervous system, and that carries a gigantic number of unsolved problems.

>>5510999
>giving up on humanity achieving tier 3 technology level

NEVER

>>5512443
That excerpt oozes victimization. Also, an arrow in a diagram pointing the wrong way could possibly be the underlying reason for everything being wrong. I haven't seen the diagram, I'm just saying that getting huffy over "one small error" isn't good in science.

>>5511287
>>5511323
Why not? People get laser eye surgery routinely nowadays. This will be just one more thing that you do for your health. Granted, most of it will have a huge cost and won't be so common, but I'm sure small implants and prostheses will become more accepted.

>>5511441

hee

>>5511579
>I laughed harder than i should have period

I'm so sick of hearing this.

>>5512443
they did, and people seem to be missing a very important part, conservation of momentum is directly derivable from the standard model. if your math says that you get something where momentum isn't conserved you did something wrong. conservation of momentum has nothing to do with Newton, doesn't even know why they mention it. this was clearly written with a bias.

>>5512483
Not really.
There's already a bionic arm that is controlled neurally. It can even transmit sensory info BACK.
It's currently being held back by sensor technology, we just don't have sensors small and sensitive enough to transmit all the data without interfering with each other.

>cold fusion

I've seen enough. Rossi finally disappeared off the face of the Earth after making promises he couldn't keep and keeping people away from his machine like some fucking little weasel. Time for his fervently brainwashed followers to do so as well.

>http://www.wired.co.uk/news/archive/2013-02/06/emdrive-and-cold-fusion

>cold fusion

saged right there

>>5513219
>It's currently being held back by sensor technology, we just don't have sensors small and sensitive enough to transmit all the data without interfering with each other.

No. the real problem is neural interfacing. Sensors can be made small and whatever else, but sending high bandwidth data to the brain is still a problem. Due to immature tech, surgery requirements and short-lasting electrodfes.

>>5513371
Not really. The thing I'm talking about moves the nerves from the arm stump into the chest.
The patient then moves the arm by twitching his chest muscle, and can actually FEEL touch and heat on his hand when it's applied to his chest.

So they hook up a bunch of electrodes to his chest to detect nerve impulses and then put a bunch of mechanical pistons and shit on his chest that poke and prod him.


Besides, you can hear through your tongue with enough practice and the right kind of signal.