Search found 99 matches

by brötchen
Sun Jan 08, 2012 2:12 pm UTC
Forum: Forum Games
Topic: Type the Sentence: No Backspace, No Peeking
Replies: 459
Views: 96891

Re: Type the Sentence: No Backspace, No Peeking

Yhilde()_frf greenOOOysdgklö Eyjafjallajökull
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by brötchen
Fri Jan 06, 2012 2:50 pm UTC
Forum: Science
Topic: Show me your data!
Replies: 15
Views: 2761

Re: Show me your data!

So the rules of the game mode I played are that a game always lasts at most 2 minutes (of course you can lose before the 2 minute mark by just stacking blocks to high but that happened very rarely because the default block falling speed is so slow) the block falling speed doesn't seem to change much...
by brötchen
Thu Jan 05, 2012 6:35 pm UTC
Forum: Science
Topic: Show me your data!
Replies: 15
Views: 2761

Re: Show me your data!

What is the definition of speed? Points per time, lines per time, ...? I think most of the correlation effects you can find come from a variable which you do not have: Sanity and height of the stack. A nice, small stack allows you to get a good efficiency, a good high score and maybe even a high sp...
by brötchen
Thu Jan 05, 2012 4:46 pm UTC
Forum: Science
Topic: Show me your data!
Replies: 15
Views: 2761

Re: Show me your data!

My tetris dataset has become large enugh to be somewhat interesting (N>100) Here is the scoredistribution: http://img811.imageshack.us/img811/3788/tetrisultrastatshtml3ad.jpg Here a scatterplot of efficiency (which is calculated by dividing the score by the number of lines cleared) vs. score http://...
by brötchen
Fri Dec 30, 2011 1:12 am UTC
Forum: General
Topic: Christmas: What did you get?
Replies: 144
Views: 23781

Re: Christmas: What did you get?

not gona list everything but rather only the thing that you guys would probably find most interesting :
a gömböc!

Image
by brötchen
Sun Dec 18, 2011 6:00 pm UTC
Forum: Science
Topic: Show me your data!
Replies: 15
Views: 2761

Show me your data!

Hi So recently my interest in nice data-sets has sparked up again and I would be interested in hearing stories about interesting data-sets and statistics you created or found. The thing that caused me to start this thread was my frustration with the fact that on the official online instance of tetri...
by brötchen
Mon Oct 10, 2011 4:56 pm UTC
Forum: Science
Topic: quantum tunneling composite
Replies: 1
Views: 891

quantum tunneling composite

Hi Recently I've read that there was a research group trying to implement a material called quantum tunneling composite, qtc for short, in to an pressure sensitive touchscreen. after some research i found that materials operating on the same principals have already been demonstrated to work as a sor...
by brötchen
Mon Feb 21, 2011 4:06 pm UTC
Forum: Science
Topic: Aerodynamic rotor (optimal number of blades)
Replies: 17
Views: 2189

Re: Aerodynamic rotor (optimal number of blades)

The wikipedia page you linked states that there is a "diminishing return" and goes on to claim that there is a 6% increase in efficiency when increasing blade count from 1 to 2 which confuses me as i would have thought that having twice the blade area would mean twice the power.
by brötchen
Mon Feb 21, 2011 3:35 pm UTC
Forum: Science
Topic: Aerodynamic rotor (optimal number of blades)
Replies: 17
Views: 2189

Aerodynamic rotor (optimal number of blades)

So i have been reading all sorts of blogs,wikipedia articels etc. about UAVs and, especially rotor-wing type UAVs, which got me thinking about what factors influence rotor design. to me it seems that the most important aspect of a rotor that is intended for UAV is efficiency which, in this case mean...
by brötchen
Sat Feb 12, 2011 3:58 pm UTC
Forum: Science
Topic: Civilian Avionics
Replies: 90
Views: 8695

Re: Civilian Avionics

Would it be feasible to retrofit the engines with an afterburner? while I'm not very knowledgeable in the area but it seems to me that an afterburner is a fairly light piece of equipment which could improve your thrust to wight ratio quiet a bit (but also wastes a metric f#&k-ton of fuel). is it...
by brötchen
Sat Feb 12, 2011 1:11 pm UTC
Forum: Science
Topic: low-absorbance white paint for indirect lighting
Replies: 3
Views: 919

low-absorbance white paint for indirect lighting

So I'm thinking about building an LED based lamp for my room but since LED's tend to be fairly pointy light sources i want to build a indirect lighting system. The Problem I ran into is that there is little to no data about the absorbance spectrum of standard wall paint, which would be used as the d...
by brötchen
Wed Jan 05, 2011 10:09 pm UTC
Forum: General
Topic: Is there a market for a HUGE ballpit?
Replies: 10
Views: 2513

Re: Is there a market for a HUGE ballpit?

Yes, there's an adult sized indoor "childrens play area" called the Fun Centre near me; they're always booked up by groups, It's great fun too! including ballpit? must be awesome. There are way to few places where adults or even teenagers can just play around. for some reason play seems t...
by brötchen
Wed Jan 05, 2011 8:53 pm UTC
Forum: General
Topic: Is there a market for a HUGE ballpit?
Replies: 10
Views: 2513

Re: Is there a market for a HUGE ballpit?

well for sanitation i would imagine something like an industrial sized dish washer that is continuously filled with dirty balls from the pit and automatically puts the washed balls back in the pit via conveyor belt or pneumatic tubes. i don't think it would be more difficult the keep a large ball-pi...
by brötchen
Wed Jan 05, 2011 7:56 pm UTC
Forum: General
Topic: Is there a market for a HUGE ballpit?
Replies: 10
Views: 2513

Is there a market for a HUGE ballpit?

Among the xkcd community ball-pits see to enjoy a quiet large popularity but im wondering how popular ball-pits would be among the general public. do you think there would be enough interest in ball-pits to make it a viable business model to have something like a big swimming pool but with balls ins...
by brötchen
Sun Jan 02, 2011 1:32 pm UTC
Forum: Science
Topic: Braincells for reaserch
Replies: 1
Views: 522

Braincells for reaserch

recently i read an article about a small robot that was entirely controlled by rat neurons and since than i have been wondering how those neurons where obtained. one way would be to just cut open rat brains but that seems rather impractical as you would have to kill a new rat every time you want to ...
by brötchen
Mon Dec 06, 2010 7:17 pm UTC
Forum: Science
Topic: optical mouse sensor for robot positioning
Replies: 9
Views: 2807

Re: optical mouse sensor for robot positioning

Every one suggesting that mouse sensors might not be the greatest thing for overall positioning of a robot are probably right. The point of using a mouse sensor would be that they have high a resolution and fairly good accuracy over small distances which would help when used in combination with a ro...
by brötchen
Sat Dec 04, 2010 8:50 pm UTC
Forum: Science
Topic: optical mouse sensor for robot positioning
Replies: 9
Views: 2807

optical mouse sensor for robot positioning

i have a little geometry problem here. it seems to me that for small house robots like the roomba it would be a good idea to get relative heading and speed data (and there for also position date, although position data that is prone to drift) by using the same sensors that are used in optical mice. ...
by brötchen
Sun Oct 17, 2010 12:26 am UTC
Forum: Science
Topic: your thoughts on "number stations"
Replies: 26
Views: 2505

Re: your thoughts on "number stations"

i dont thin the security is verry uncertain. apperently they are using one-time-pad encryption which, if used right, is mathmaticaly proven to be unbrakable but reqiers a "password" thats just as long as the transmitted data set. Sie wohnen denn in Deutschland, oder Osterreich, oder Schwei...
by brötchen
Sun Oct 17, 2010 12:02 am UTC
Forum: Science
Topic: your thoughts on "number stations"
Replies: 26
Views: 2505

Re: your thoughts on "number stations"

well i get that ther is no way to find out who is reciving the massages but still in most situations there would be faster easier ways to safely get data to some one.. i men slowly reading numbers is just about the slowest way of comunciation imaginable.. @badwiz yes i'm pretty sure they exist. appa...
by brötchen
Sat Oct 16, 2010 11:36 pm UTC
Forum: Science
Topic: your thoughts on "number stations"
Replies: 26
Views: 2505

your thoughts on "number stations"

so maybe you have heard about the so called "number stations", short wave radio stations that do nothing except sending out numbers or letters (some times in a human voice, sometimes in a synthetic human voice and sometimes in Morse code), apparently the most common theory about the reason...
by brötchen
Sat Oct 16, 2010 2:31 pm UTC
Forum: Science
Topic: introduction to M-theory
Replies: 9
Views: 2388

Re: introduction to M-theory

thanks for all your help but after reading throgh the linked pages and starting to read "the elegant universe" im not much further... is there anyplace where i can find a step by step explenation of the string theoretic interpretation of a simple pariticle interaction (like elektron positr...
by brötchen
Tue Aug 24, 2010 8:14 pm UTC
Forum: Science
Topic: is smell related to molecular weight ?
Replies: 9
Views: 2162

Re: is smell related to molecular weight ?

i don't see how this answers my question... all the article says is that there are receptors for different kinds of molecules and that we apparently don't jet fully understand what property of a molecule determines which receptor it will triger with what intensity : "An alternative theory, the ...
by brötchen
Tue Aug 24, 2010 7:59 pm UTC
Forum: Science
Topic: is smell related to molecular weight ?
Replies: 9
Views: 2162

is smell related to molecular weight ?

for a long time now i was thinking that smell was basically a sens of molecular weight in much the same way color perception is a sense of wavelength (what i mean by that is that while our eye isn't really capable of distinguishing more than 3 wavelength it still gives a rough idea of wavelength) . ...
by brötchen
Sat Aug 21, 2010 2:21 pm UTC
Forum: Mathematics
Topic: improve upon the age/2+7 rule of creepynes
Replies: 51
Views: 8046

Re: improve upon the age/2+7 rule of creepynes

nice idea about the non binary rule. this : http://blog.okcupid.com/index.php/the-c ... der-woman/ has some related data . seems like the age/2+7 rule is not quiet up to reality even when only considering ages significantly above 14
by brötchen
Sun Aug 15, 2010 4:45 pm UTC
Forum: Mathematics
Topic: improve upon the age/2+7 rule of creepynes
Replies: 51
Views: 8046

Re: improve upon the age/2+7 rule of creepynes

The rule doesn't fit observation the rule has to be changed !
by brötchen
Sun Aug 15, 2010 3:20 pm UTC
Forum: Mathematics
Topic: improve upon the age/2+7 rule of creepynes
Replies: 51
Views: 8046

Re: improve upon the age/2+7 rule of creepynes

Mike_Bson wrote:Why should people under 14 be dating?

i dont know. but people under 14 do date, its not common but it happens and its not necesarily creepie (at least i dont think so) therefore the rule dosen't seem to describe reality.
by brötchen
Sun Aug 15, 2010 1:33 pm UTC
Forum: Mathematics
Topic: improve upon the age/2+7 rule of creepynes
Replies: 51
Views: 8046

improve upon the age/2+7 rule of creepynes

while the age/2+7 rule works well above the age of 20 it becomes nonsensical bellow 14 so how do we solve this ? the ultimate function of creepynes should approach x=y for small values of x(age) and approach x/2+7=y for higher values of x. what function do you think fits best ? excuse my surely terr...
by brötchen
Thu Aug 12, 2010 3:37 pm UTC
Forum: Science
Topic: introduction to M-theory
Replies: 9
Views: 2388

Re: introduction to M-theory

thanks so far i will definitely look into "the elegant universe" and tell my friend about "In Search of Schroedinger's Cat" How much physics do you have? I have a very basic understanding of the standart modell of partical physics and a slightly less basic understanding of rleati...
by brötchen
Wed Aug 11, 2010 12:07 pm UTC
Forum: Science
Topic: introduction to M-theory
Replies: 9
Views: 2388

introduction to M-theory

i would really like to get a very basic understanding of M-theory but i have trouble finding a reasonable introduction to the topic. everything i find is either very very high level or just: "well there are lots of curled up dimensions and mater is composed of vibrating strings, that's string t...
by brötchen
Wed Aug 04, 2010 4:50 pm UTC
Forum: Science
Topic: is wolfam alpha geting worse ?
Replies: 1
Views: 1043

is wolfam alpha geting worse ?

is it just me or is wolfram alpha getting stupider ? i while ago i tried to figure out how many lumens 1 watt of green light (i think it was around 530nm) was it worked on the first try and the formulation was something like : "1watt monochromatic light 530nm" now if i type that into wolfr...
by brötchen
Mon Jul 19, 2010 8:10 pm UTC
Forum: General
Topic: value of teenage emotions
Replies: 15
Views: 2825

Re: value of teenage emotions

This brings you to question what your identity really is. Do you consider yourself the voice in your head, operating the machinery to the best of its ability, or are you the sum of your parts, a collection of cells that gives rise to consciousness. The fact emotions are generic isn't troubling to m...
by brötchen
Sun Jul 18, 2010 5:16 pm UTC
Forum: General
Topic: value of teenage emotions
Replies: 15
Views: 2825

value of teenage emotions

the other thread i started about my feeling of wasting my time on failed relationships got me thinking about how seriously i can take my emotions ... what value is there to emotions if they are generic , if just about every teenager has the same feelings ? even this line of thought is probably rathe...
by brötchen
Thu Jul 15, 2010 3:15 pm UTC
Forum: Mathematics
Topic: Mathematical Definition of Love
Replies: 34
Views: 9994

Re: Mathematical Definition of Love

An interesting consequence of the formula is that, if they love you more than you love them by a large factor, (that is, n2>>n1) your will to live is mostly dependent on your happiness, growing without bound proportionally to their love for you its almost creepy how well this coresponds to what is ...
by brötchen
Thu Jul 15, 2010 2:29 pm UTC
Forum: Mathematics
Topic: confused by simple probability ....
Replies: 9
Views: 2462

Re: confused by simple probability ....

When X = 3 you have 3C3 * (2/3)^3 * (1/3)^0 = (2/3)^3 = the chance of getting three loses why are you defining x ? you dont use x anywhere in the formula. and what is C ? or is that a typo and C is actually suposed to be X ? even than i dont see why you would define and use a variable when you didn...
by brötchen
Thu Jul 15, 2010 3:47 am UTC
Forum: Mathematics
Topic: confused by simple probability ....
Replies: 9
Views: 2462

Re: confused by simple probability ....

If you roll one die, what's the chance of it coming up "Lose"? If you roll three dice, what's the chance they all come up "Lose"? If you roll three dice, what's the chance they don't all come up "Lose"? if i role one die the probability of it coming up "lose"...
by brötchen
Thu Jul 15, 2010 3:27 am UTC
Forum: Mathematics
Topic: confused by simple probability ....
Replies: 9
Views: 2462

Re: confused by simple probability ....

i think binominal distribution doesn't apply here because the game is won not only if you get exactely one coin right but also if you get more than one coin right
by brötchen
Thu Jul 15, 2010 3:04 am UTC
Forum: Mathematics
Topic: confused by simple probability ....
Replies: 9
Views: 2462

confused by simple probability ....

i really should know how to solve this my self but for some reason i dont ....so : if you toss a coin there is a probability of 1/2 to get either side of the coin if you define one side of the coin as the winning side and you get two coin tosses and getting one coin to land on the winning side is en...
by brötchen
Mon Jul 12, 2010 4:41 pm UTC
Forum: Science
Topic: at what pressure will water condensate from air
Replies: 2
Views: 816

at what pressure will water condensate from air

given temperature and humidity of the air , how do I calculate how much pressure I would have to apply in order to get the water to condensate ? (assuming that the pressure heating is compensate by an heat exchanger that will keep the outside air and the air inside the pressure vessel at the same te...
by brötchen
Thu Jun 24, 2010 4:04 pm UTC
Forum: Science
Topic: where to get platinum group metals and rhenium ?
Replies: 5
Views: 1477

Re: where to get platinum group metals and rhenium ?

If I remember right isn't Iridium also radioactive? In addition, wouldn't its extreme density and weight make it difficult to be jewelry? The thought of a 5 pound bracelet probably isn't an appealing one. Though, wearing a metal normally only found in asteroids or meteorite impacts is intriguing. I...

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