Search found 99 matches

by brötchen
Thu Jun 24, 2010 2:55 pm UTC
Forum: Science
Topic: where to get platinum group metals and rhenium ?
Replies: 5
Views: 1478

Re: where to get platinum group metals and rhenium ?

If you don't mind my asking, what are you planning to do with them? You mentioned the mechanical properties; do you mean their structural properties (tensile strength, for example) or are you looking at chemical/electrical properties? what I'm planing to do might sound really stupid considering tha...
by brötchen
Wed Jun 23, 2010 6:48 pm UTC
Forum: Science
Topic: where to get platinum group metals and rhenium ?
Replies: 5
Views: 1478

where to get platinum group metals and rhenium ?

the subjecktline really says it all. do you know where to get those metals ? I'm mainly interested in rhenium and iridium because of their awesome mechanical properties. also : how do trade prices for those metals relate to what i will have to actually pay ? for example this site: http://www.taxfree...
by brötchen
Fri Jun 04, 2010 9:07 pm UTC
Forum: General
Topic: HELP my freinds are driving me nuts
Replies: 25
Views: 3244

Re: HELP my freinds are driving me nuts

:roll: two less lonly people thats all ^^
by brötchen
Thu Jun 03, 2010 9:56 am UTC
Forum: General
Topic: HELP my freinds are driving me nuts
Replies: 25
Views: 3244

Re: HELP my freinds are driving me nuts

well maters resolved themselves . turns out human mating behavior is fucking wired ... and yes it was kinda unimportant relative to me but also kind of a big deal relative to the social structure surrounding me . and no , no one was "fancyin" me
by brötchen
Wed May 26, 2010 8:59 pm UTC
Forum: General
Topic: HELP my freinds are driving me nuts
Replies: 25
Views: 3244

Re: HELP my freinds are driving me nuts

SecondTalon wrote:Whatever it is, must be unimportant.

Either that, or you left your pants unzipped. One of the two.

several weeks i a row ? well i better check that ^^
by brötchen
Wed May 26, 2010 8:50 pm UTC
Forum: General
Topic: HELP my freinds are driving me nuts
Replies: 25
Views: 3244

Re: HELP my freinds are driving me nuts

Kewangji wrote:Someone's fancyin' ya, guv.

wishfull thinking right there ^^ im prety sure its not that. the theroy that someone is fucking with mr is waaaay more likely but as is said : very trustworthy people involved ...
by brötchen
Wed May 26, 2010 7:51 pm UTC
Forum: General
Topic: HELP my freinds are driving me nuts
Replies: 25
Views: 3244

HELP my freinds are driving me nuts

i fell like i'm about to rip someones head of ... there is something going on around me that supposedly is "SOOO fucking obvious" but nobody tells me what it is... its probably something stupid that i usually wouldn't care much about but not knowing and having no means of knowing is drivin...
by brötchen
Mon Apr 26, 2010 2:43 pm UTC
Forum: Science
Topic: 3 gyros and a spinning gyro
Replies: 7
Views: 1149

Re: 3 gyros and a spinning gyro

WTF? That video fails. Angular momentum adds, so taping two together is never better than using one at twice the speed. By taping them at right angles he just reduces the total angular momentum by a factor 3 1/2 , it would be better to simply stack them. Without active control of either axes or rot...
by brötchen
Mon Apr 26, 2010 2:08 pm UTC
Forum: Science
Topic: ethics of artificial suffering
Replies: 120
Views: 14912

Re: ethics of artificial suffering

i found it to be rather mind blowing to think about all this in the context of xkcd 505 ( the one with the bunch of rocks) ... if you assume that a simulation may be unethical ( which i think is the case) it leads to the conclusion that there are certain configurations of rocks that are unethical .....
by brötchen
Mon Apr 26, 2010 8:04 am UTC
Forum: Science
Topic: ethics of artificial suffering
Replies: 120
Views: 14912

Re: ethics of artificial suffering

also i couldnt really sue the creator of my universe but he would probably be sued by others of his kind.... just like a simulated human running on a computer i own couldnt sue me but i would still get in trouble for being un ethical to the simulation cool, so the god's dad will kick god's ass for ...
by brötchen
Mon Apr 26, 2010 7:33 am UTC
Forum: Science
Topic: ethics of artificial suffering
Replies: 120
Views: 14912

Re: ethics of artificial suffering

what about a simulated human without simulated universe ? what about non-simulated human without its environment? imagine yourself suddenly suffocating in the emptiest place of our universe, Douglas Adams style. and then you hear deep voice in your head: "we hold these truths to be self eviden...
by brötchen
Mon Apr 26, 2010 7:05 am UTC
Forum: Science
Topic: 3 gyros and a spinning gyro
Replies: 7
Views: 1149

3 gyros and a spinning gyro

what would hapen if you glued 3 gyroscopes together in a way that the axis ar all perpendicular ? intuition tells me that you would end up with a device that would , when running, be really hard to rotate along any axis ..... but that just seams so wrong ... also what abou a gyroscope that is reved ...
by brötchen
Mon Apr 26, 2010 6:45 am UTC
Forum: Science
Topic: ethics of artificial suffering
Replies: 120
Views: 14912

Re: ethics of artificial suffering

what about a simulated human without simulated universe ? just supply the simulation with means of interacting with the real world. i don't think it changes anything about the rights of the simulation weather or not its environment is a simulation as well and i don't really understand why it would d...
by brötchen
Sun Apr 25, 2010 9:46 am UTC
Forum: Science
Topic: So, quick question. (Earth stopped in its tracks)
Replies: 103
Views: 9210

Re: So, quick question. (Earth stopped in its tracks)

whats the best why to make oxygen from co2 using thermal energy ? plants wold probably suck as you hat to transform the thermal energy to light energy first. maybe this : http://en.wikipedia.org/wiki/Bosch_reaction combined with electrolysis would work. keeping the carbon cycle going would probably ...
by brötchen
Sun Apr 25, 2010 9:07 am UTC
Forum: Science
Topic: Explaining Magnetic Nonsense
Replies: 14
Views: 1762

Re: Explaining Magnetic Nonsense

If it performed as advertised, then at least ostensibly, it is generating kinetic energy, where there wasn't energy before, only from the permanent magnet. And that's a little bit dodgy. nonono ... it transforms potential energy into kinetic energy . first there is one ball near the magnet and two ...
by brötchen
Sat Apr 24, 2010 3:25 pm UTC
Forum: Science
Topic: ethics of artificial suffering
Replies: 120
Views: 14912

ethics of artificial suffering

lately i'v been thinking a lot about the possibilities of powerful ai systems and the also about related ethical problems . how does a machine qualify for " human rights" ? shouldn't a machine simulating a full human being have the same rights as a human being ? are we allowed to cancel an...
by brötchen
Mon Jan 11, 2010 5:45 pm UTC
Forum: Science
Topic: x-prize team xkcd
Replies: 7
Views: 1257

Re: x-prize team xkcd

Sounds like it'd be fun, but of course, there's the expense thing. Would it get off the ground? well i was thinking more along the lines of hypothetically planning a mission and maybe helping the established teams out if we accomplish anything significant but on the other hand ,if there is enough i...
by brötchen
Mon Jan 11, 2010 4:36 pm UTC
Forum: Science
Topic: DIY LED Flashlight/Spotlight
Replies: 10
Views: 4366

Re: DIY LED Flashlight/Spotlight

if you realy want to go crazy on the project i can recommend you take a look at candlepowerforums (a forum for flashlight fanatics ^^ ) another thing is: you might want to use other leds for a WAY better result think some thing like this : http://www.cree.com/products/xlamp_xpg.asp the one shown in ...
by brötchen
Sun Jan 10, 2010 4:09 pm UTC
Forum: Science
Topic: x-prize team xkcd
Replies: 7
Views: 1257

x-prize team xkcd

well i was just thinking about the lunar x-prize and it came to my mind that it would be extremely awesome if there would be a team xkcd taking part in the competition :D . since getting a rover to the moon involves quiet a lot of money i don't think that there is actually going to be a “team xkcd” ...
by brötchen
Fri Jan 08, 2010 3:03 pm UTC
Forum: Science
Topic: why would a photon drive suck so bad ?
Replies: 29
Views: 5988

Re: why would a photon drive suck so bad ?

ok i'm starting to understand but i'm not totally sure how this works yet .... so imagine you have two objects, A and B, moving at high speed through space , A has half the mass of B but both have the same kinetic energy ( A is faster obviously) and now they both hit an object ( those objects are id...
by brötchen
Wed Jan 06, 2010 2:45 am UTC
Forum: Science
Topic: why would a photon drive suck so bad ?
Replies: 29
Views: 5988

why would a photon drive suck so bad ?

Photon divers are insanely inefficient .. but why ?
dose a photon carry energy other than its momentum ? if Not where else does the inefficiency of photon drives come from ?
(by photon drive i just mean a light source with the purpose of accelerating a space probe or something of that sort )
by brötchen
Sun Jan 03, 2010 7:14 pm UTC
Forum: Science
Topic: Random knowledge
Replies: 32
Views: 3282

Re: Random knowledge

1.glow in the dark powder stops emitting light when its cooled down enough ( I used dry ice to test this) i'm currently not sure if it keeps “charging” when its cooled 2.glow in the dark powder emits more light when heated up 3.carbonated milk=bad idea 4.chocolate dust is very hydrophobic 5.dry ice ...
by brötchen
Sun Jan 03, 2010 5:39 pm UTC
Forum: Science
Topic: I want to see this graph...
Replies: 3
Views: 1031

Re: I want to see this graph...

Arcnsparc wrote:vs change in entropy

i don't get what you mean by that ... entropy of what system ?
maybe entropy of the data computed with a given function with different amounts of computational power ? (does that even make any sense ?)
by brötchen
Tue Dec 29, 2009 10:45 am UTC
Forum: Hardware
Topic: looking for smartphone security app
Replies: 0
Views: 473

looking for smartphone security app

I'm most likely going to get a motorola droid ( or milestone as its called around here) and since its kind of an expansive hunk of electronics that I'm likely going to be carrying around a lot i would like to have an app that could run in the background and tweet out ( or in some other form send me)...
by brötchen
Sat Nov 07, 2009 6:51 pm UTC
Forum: Science
Topic: sodium chlorate
Replies: 3
Views: 773

sodium chlorate

hi, I'm somewhat interested in life support systems ever since i started the underwater station thread and recently i came across an cool way to make oxygen : chemical oxygen generators. most of the time they are based on sodium chlorate , which is kinda hard to get because since its an oxidizer one...
by brötchen
Sat Oct 24, 2009 12:18 am UTC
Forum: Science
Topic: Minimum divergence for given lens and light source diameter
Replies: 5
Views: 974

Re: Minimum divergence for given lens and light source diameter

2 millimeters through a lens? It depends on your lens optics. the magnification should tell you what the resolution of your image should be. When you get smaller, you will find that your resolution is limited instead by diffraction of light, that is the wave-like properties. hmm i don't quiet get w...
by brötchen
Thu Oct 22, 2009 11:05 am UTC
Forum: Science
Topic: Minimum divergence for given lens and light source diameter
Replies: 5
Views: 974

Minimum divergence for given lens and light source diameter

I want to calculate the lowest possible divergence for any given lens diameter with a light source about 2mm in size (an high power led to be precise there is a lens already glued on to the chip and the viewing angel is 125 degrees but I relay don't think that changes the theoretical limit much)but ...
by brötchen
Wed Oct 21, 2009 9:37 pm UTC
Forum: Science
Topic: Misbehaving thermocouple?
Replies: 12
Views: 1672

Re: Misbehaving thermocouple?

how can you mesure tempratures with a thermocouple ? from my understanding a thermocouple generates a voltage depending on temprature DIFFERENCE not absolute temprature so how can you use it as an thermometer ?
by brötchen
Wed Oct 21, 2009 9:30 pm UTC
Forum: Science
Topic: fantasies about an underwater station
Replies: 70
Views: 4563

Re: fantasies about an underwater station

Are they? I don't know much about the specifics, but I'm under the impression a couple 'bulbs' so to speak (There's a nautical device that was placed at key points along the deck, that was a kind of prism with a flat base, that acted as a sealed means for delivering sunlight into the recesses of a ...
by brötchen
Wed Oct 14, 2009 1:29 pm UTC
Forum: Science
Topic: Red oxygen
Replies: 6
Views: 1175

Red oxygen

i have just heard about a wired form of oxygen that forms at 10Gpa... apparently its a solid, red and absorbs ir quiet well. sadly I couldn't find out much more about this amazing stuff and i also don't know if it will stay stable at normal pressures (that would be awesome because you could use it a...
by brötchen
Mon Oct 12, 2009 11:58 am UTC
Forum: Science
Topic: An interesting question: Perfect Mirror Ball
Replies: 56
Views: 13027

Re: An interesting question

i guess it will be like a black hole with the difference that at first there is no significant gravitational force. but this would soon change as it eats up mater energy and anti mater (from quantum fluctuation). well lets assume that for some reason this thing wont just drop right trough everything...
by brötchen
Mon Oct 12, 2009 11:07 am UTC
Forum: Science
Topic: fantasies about an underwater station
Replies: 70
Views: 4563

Re: fantasies about an underwater station

Other options you seem to have missed for both power and carbon dioxide removal, both sharing an inspiration: Have a flexible cord leading to a floating buoy. Even at a few hundred meters down, this is pretty easy. Have this buoy have as many solar panels as you like, or have it suspend an algal bu...
by brötchen
Sun Oct 11, 2009 10:28 pm UTC
Forum: Science
Topic: fantasies about an underwater station
Replies: 70
Views: 4563

Re: fantasies about an underwater station

If you want to remove the carbon dioxide without expendable scrubbers or anything, you could take the inefficient and ugly route and just make oxygen on one side of the station, and vent air on the other. Only a little bit of the oxygen will be used, so you'll have to make a ton of it. Also, I can'...
by brötchen
Sun Oct 11, 2009 2:34 pm UTC
Forum: Science
Topic: fantasies about an underwater station
Replies: 70
Views: 4563

Re: fantasies about an underwater station

Well yeah, 600W per person might be fine, but that means to support a reasonable population of say a couple of thousand at the minimum, that would be around 8-10 thousand m squared which is a lot of sea to cover, and rather impractical as either its environmentally bad for the whales etc. or if tha...
by brötchen
Sun Oct 11, 2009 2:00 pm UTC
Forum: Science
Topic: fantasies about an underwater station
Replies: 70
Views: 4563

Re: fantasies about an underwater station

BlackSails wrote:For energy, its really simple. You have a nuclear reactor.

well that would be expensive .... but it would work
by brötchen
Sun Oct 11, 2009 12:49 pm UTC
Forum: Science
Topic: fantasies about an underwater station
Replies: 70
Views: 4563

Re: fantasies about an underwater station

I think you could use this effect: http://www.oceanoasis.org/teachersguide/images/a6-upwelling2.jpg that looks nice. i will try to find some numbers on this effect to see if its significant . I dont think a water turbine is quiet what i mean.. a water turbine uses hight difference as a source of en...
by brötchen
Sun Oct 11, 2009 12:13 pm UTC
Forum: Science
Topic: fantasies about an underwater station
Replies: 70
Views: 4563

Re: fantasies about an underwater station

Also, how are we planning to account for station drift? I can't think of any other way but anchorage, and if its shallow enough to anchor then its likely to shallow to sink pipes down for geothermal energy, so biomass is the only sustainable energy source I can see. Is there any problems in letting...
by brötchen
Sun Oct 11, 2009 9:04 am UTC
Forum: Science
Topic: fantasies about an underwater station
Replies: 70
Views: 4563

Re: fantasies about an underwater station

What purpose would there be in having the station that deep? If it's for tourism 100 meters is just as underwater-y as 500. well its just hypothetical and for the purpose of awesome :wink: but i guess your right ... even through it isn't clear if the Avascular necrosis thing effects everyone i stil...
by brötchen
Sat Oct 10, 2009 9:56 pm UTC
Forum: Science
Topic: fantasies about an underwater station
Replies: 70
Views: 4563

Re: fantasies about an underwater station

hmm. Wikipedia says polycarbonate can take 80 Megapascals, so it should be sufficient for just about anything. well polycarbonate is kinda amazing stuff but all im saying ist that there is no need for multiple layers of it becaus one thiker layer works just as well. Okay I admit it, I misread as 'u...
by brötchen
Sat Oct 10, 2009 8:52 pm UTC
Forum: Science
Topic: fantasies about an underwater station
Replies: 70
Views: 4563

Re: fantasies about an underwater station

Are we assuming 50 bars then? Because it highly depends on the depth. sound good to me this way we will have something to work on. And this has probably been done, but could you create a window with several panes of strong plexiglass (lexan?) with the air pressure between them gradually changing. T...

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