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The Physics of Friendship

Santosh Maharshi wrote to mention a Physorg story about a new way to model social networks. From the article: "Applying a mathematical model to the social dynamics of people presents difficulties not involved with more physical - and perhaps more rational - applications. The many factors that influence an individual's fate to meet an acquaintance and decide to become a friend are impossible to capture, but physicists have used techniques from physical systems to model social networks with near precision. By modeling people's interactions based on how particles bounce off each other in an enclosed area, physicists Marta Gonzalez, Pedro Lind and Hans Herrmann found that the characteristics of social networks emerge 'in a very natural way.'"

29 of 112 comments (clear)

  1. So in other words... by moochfish · · Score: 4, Funny

    When you can't figure out why you have no friends, you hole yourself up in the basement for 3 years and come out with an equation that explains your shell of a social life. ;D

  2. emerge 'in a very natural way.' by slashflood · · Score: 5, Funny

    Calculating dependencies
    emerge: there are no ebuilds to satisfy "in a very natural way.".

  3. Unfortunately by RootsLINUX · · Score: 4, Funny

    Unfortunately for the scientists responsible for the discovery, they still can't seem to get a hot date on Friday nights. :(

    --
    Hero of Allacrost, a FOSS RPG for *NIX/*BSD/OS X/Win
  4. The article's illustration. by babbling · · Score: 4, Funny

    See that picture at the top of the article? The big cloud with lots of fuzzy stuff in the middle, and then a less populated border?

    Most of us were probably the border in high school...

  5. heh by narkotix · · Score: 4, Funny

    still not as good as this equation.

    --
    We played dungeons and dragons for 3 hours.....then i was slain by an elf
  6. Re:What are the applications? by mattjb0010 · · Score: 5, Funny

    "Hey baby, wanna bounce off me in an enclosed area?"

  7. I think it's a ridiculous notion by elucido · · Score: 5, Insightful

    I do not think friendships work in such a way that math can literally outline the direction they are headed. Friendship is based on loyalty, when someone involved is disloyal it usually ends, and this can happy at any time. So friendships by nature come and go, and all relationships are temporary. The goal in this I suppose is to try to find patterns, so here is a pattern

    If you want to have stronger friendships, have leverage, enough money, or charisma to keep people hovering around you. These variables can be added into the equation and then there are patterns, but if you just look at it emotionally then it will be complete chaos because emotion is not logical. There are logical elements of friendship, logical components, and logical tools which one can use to keep a friendship together or tear it apart.

    1. Re:I think it's a ridiculous notion by NichG · · Score: 4, Informative

      Complete chaos is a lot more predictable than incomplete chaos. Incomplete chaos, you have to worry about when its ergodic and when it isn't. If there are aspects which are totally random, or at least sufficiently random that for all intents and purposes you can't predict the exact sequence of states then you can just use the distributions. The end result will be a theory that becomes more accurate the larger the system it's used to describe. It'll fail utterly on a group of three people but will work brilliantly on a group of three billion.

    2. Re:I think it's a ridiculous notion by elucido · · Score: 2, Insightful

      That's actually a good point. I can see this working on the scale of billions because there will definately be patterns, but I don't know how or why you'd want to apply this to billions of people.

    3. Re:I think it's a ridiculous notion by maize · · Score: 2, Informative



      well, the law of large numbers kicks in surpisingly quickly for most systems (in most statistal analysis, the problem tends to be the provability of lack of bias in the sample group more then the sample size).

      Further, someone above mentioned that emotions aren't logical. I would say that you're just making that judgement from the wrong perspective. The experience of an emotion might arrest our own consious facilities and the emotional response to any particular stimulus may not be the most optimised behavioral reaction for that particular situation, but emotional response is not optimised to modern life. It's optimised toward species survival across a span of hundreds of thousands (homo sapiens sapiens) to millions (mammalian inheritance) of years.

      --
      iami
    4. Re:I think it's a ridiculous notion by nickthecook · · Score: 2, Interesting

      If you want to have stronger friendships, have leverage, enough money, or charisma to keep people hovering around you. These variables can be added into the equation and then there are patterns...

      According to the article, it seems as if they could go the other way, and infer who has at least one of these properties based on the statistics. This would make the technique of interest to some people. Unfortunately, offhand it seems as if using it to more effectively market a product would be the most likely application. Marketers may be able to use this method to determine who sets the trends, and get them using their product.
  8. The nature of friendship changes over time. by elucido · · Score: 5, Interesting

    In highschool there is very few real friendships. Most of the time its just recognizeable faces, or people who are cool but don't actually matter.

    When you get to college and beyond is when you begin to build your true friendships, and these friendships arent based on emotion anymore because by this age usually a person has the ability to reason and filter out the people they don't want. By this time people usually have a laser like focus on exactly the personality types they get along with and know how to avoid the personality clashes which don't mix.

    Loyalty is glue.It holds a relationship together. Keep your word and your word means something, commit to friendships as one commits to family and you'll have something to protect. Without loyalty, friendship is just familiar faces and cool people who you talk to on a regular basis but who don't matter and who you don't miss when they are gone.

    I think theres room for both friends, and cool people, but relationships based on coolness are completely based on logic.If they are useful to you, and you are useful to them, if they and you both have reasons to hang around each other, business reasons, then these relationships last as long as there is mutual benefit.

    The emotional relationship can end overnight when someone cusses the other out. So logic is a core component of any relationship. Emotion is a component as well, but emotion cuts both ways, and usually emotional relationships do not and cannot last.

    1. Re:The nature of friendship changes over time. by Kupek · · Score: 2, Insightful

      I have very close friends from high school (one is actually from my middle school days) that as far as I'm concerned, are family. I also formed very close friendships in college. Your high school experiences don't necessarily map to others.

  9. social networks are isolated in science by funkelectric · · Score: 5, Interesting
    It is amazing how nearly all of the social networks literature I have come across has blanked out the concepts of cluster analysis and graph partioning. It seems a very in-bred discipline bent on reclustering the same old karate club over and over again. To some extent this is unfair as social networks can probably be viewed as a relatively early application of clustering in the setting of graphs. But the rest of the world has caught up if it ever was behind (biology, pattern recognition, data-mining, market-research, document clustering - the list is basically endless). It is well known that every field of research basically likes to reinvent cluster analysis all by itself, but social network people seem particularly inept at integration. Then, somehow a social network article comes up here at SD every odd couple of months as if the next coming has arrived. In this case we are extremely fortunate to witness a deep connection between bouncing particles (wow! physics!) and human actors. Hopefully Dan Brown takes notice.

    Disclaimer: I have skimmed the fine article as found on ArXiv, and apart from the obligatory and tiresome small-word references found little to get excited about either way. This rant merely applies to the entire field.

  10. Link to the Physical Review Letter by Hal-9001 · · Score: 4, Informative
    TFA has an off-by-one error on the paper number in Physical Review Letters. The actual citation is:
    Marta C. González, Pedro G. Lind, and Hans J. Herrmann, "System of Mobile Agents to Model Social Networks," Phys. Rev. Lett. 96 088702 (2006).
    --
    "It take 9 months to bear a child, no matter how many women you assign to the job."
  11. So people make sense now? by SendBot · · Score: 3, Interesting

    This is a very interesting idea, saying basically that people "collide" socially with an updated velocity analogous to making acquiantances based on your most recent social activities. I drew something similar out in a notebook once illustrating a lot of people I knew, and how and through whom I had met them (with me at the center, of course). It was very interesting to see groups where people were concentrated, and how those connected to others. Suprisingly, I would find large amounts of people that I had known, all because of one person.

    Now, what I found new and interesting from rtfa'ing was the practical applications. from tfa:
    Although this particle motion does not literally model human motion, it represents connections among people - and it's these links that contain the most significance for social networking theories. For example, links can represent the flow of information traveling through a community. By knowing the shortest path, communicators can optimize the information flow and improve productivity in a business. With the ability to determine hot hubs or holes in a community, business managers can identify leaders or points that require an organizational change.

    That could be applied to business practice, politics, military, world economics, or anything else important with a social foundation.

    Cool stuff!

    1. Re:So people make sense now? by m0nstr42 · · Score: 4, Interesting

      That could be applied to business practice, politics, military, world economics, or anything else important with a social foundation.

      Trust me, it's being done. I can speak for military and biological applications. This is very closely related to swarming, which is a pretty hot topic right now in a lot of fields. The general game is to find individual-based rules to produce desired (possibly optimal) behavior at the group level, or alternately (like TFA) to find individual-based models that describe group behavior. Ever since we've been able to make lots of little robots cheaply, this has been a big push.

  12. So could one use plasma plasma physics by Anonymous Coward · · Score: 3, Funny

    ...to describe a riot?

  13. Re:Geeks are smart but when it comes to this stuff by zippthorne · · Score: 2, Funny

    "or who cheats on women constantly,"

    Ok, but your rep can't be hurting you too much if you have plenty of women with which to cheat on the other ones.

    --
    Can you be Even More Awesome?!
  14. Re:Geeks are smart but when it comes to this stuff by azaris · · Score: 3, Informative

    It's as if they get retarded real quick. It's complicated, but if you want to make a science out of it, it's very stupid to focus on the "physics" of friendship. This is like focising on the "shape" of love, or the weight of emotion. Well okay, it does make sense to focus on these things, but why focus on these things?

    Actually, it's not stupid at all. There is lots of research into building formal models that describe and explain human behaviour. Some of it is game theoretic, this I suppose statistical. Of course you can argue that comparing human relationships to molecules bouncing around randomly doesn't make for a good model, but that's another issue.

  15. Seldon by kid-noodle · · Score: 5, Interesting

    I'm sure I've been beaten to this observation.. But this is essentially the basis of Hari Seldon's [Isaac Asimov's) psychohistory - he developed the idea based on the physics which were being used to model particle movements in gases.

    Score one for sci-fi?

    --
    fortune -o
    1. Re:Seldon by Randolpho · · Score: 2, Informative

      That was my first thought as well...

      And, frankly, I was surprised that I got this far down the first page before it was mentioned! I think more /.ers need to turn in their geek badges. :)

      --
      "Times have not become more violent. They have just become more televised."
      -Marilyn Manson
  16. Re:Geeks are smart but when it comes to this stuff by Hal_Porter · · Score: 5, Funny

    no, READ the ROADMAP. I'm sick of reading posts like this.

    human social interaction v 1.0 will be in Geek 2.1.0.4.5. Not 2.0.

    people like you who can't be bothered to make any effort installing CVS (make SURE you use cvs-unstable-12-Mar-2006-0435am or later or your machine WILL be DESTROYED. DO NOT POST HERE COMPLAINING IF THIS HAPPENS!!!) and setting up a local CVS branch and pulling the latest unstable-tainted roadmap aren't worth talking to.

    --
    echo -e 'global _start\n _start:\n mov eax, 2\n int 80h\n jmp _start' > a.asm; nasm a.asm -f elf; ld a.o -o a;
  17. So, you mean..... by killeena · · Score: 3, Funny

    ....having the creator of a social networking site add himself to everyone's friend's list isn't the way to create a social network?

    --
    Freedom would be not to choose between black and white but to abjure such prescribed choices. -Theodor Adorno
  18. I resent that... by Savage-Rabbit · · Score: 4, Funny

    When you can't figure out why you have no friends, you hole yourself up in the basement for 3 years and come out with an equation that explains your shell of a social life. ;D

    You have misunderstood this completely. It is not an effort to explain the shell that is a Nerd's social life, this is already a well understood phenomenon. This research is part of an ongoing effort to find a sientifically sound solution to the tricky problem of enabling a Nerd to find a girlfriend. If you can't understand human females and their social behavior instinctively, analyze them mathematically until you do. Of course it might take a few more decades before we have quantum computers powerful enough to handle this daunting analytical task but until then basic mathematical research like this is vital.

    --
    Only to idiots, are orders laws.
    -- Henning von Tresckow
    1. Re:I resent that... by MooUK · · Score: 3, Funny

      One of my favourite sayings: "As well try to understand a woman as to understand the sun".

      Of course, that saying was set back when they didn't have a clue about the sun. Now we mostly understand how it works, and yet women are still a complete mystery!

      (Oh, and it's not just us guys who can't understand girls. A large number of my female friends agree that girls can't understand each other either!)

  19. Looking to Quantum Particles by Anonymous Coward · · Score: 2, Funny

    Her: up, charm, top

    You: down, strange, bottom

  20. Not mentioned in the article by jurt1235 · · Score: 2, Funny

    The model also produced a single integer as result: 42

    Since the scientists could not explain the result, they decided to ignore it for now. One of the scientist was willing to give an anonymous comment:
    For me it could have been 41 or 43 as result, but I can live with 42
    Asking for further explanation, he denied further comments.

    --

    My wife's sketchblog Blob[p]: Gastrono-me
  21. High School Physics by Centurix · · Score: 2, Funny

    I can clearly state that high school consisted of various mixed states of matter. Most good looking girls were made of highly organised chrystalline structures, very rigid, but could be reduced to a liquid state with the correct application of energy. Some girls were a good solid. Some girls were perfect examples of Brownian motion, all over the place.

    On a quantum level, you were better off dating the larger Bosons, as they were always friends with the best looking low mass Photons, even though you had to put up with the odd crazy bit of anti-matter sometimes, getting into the mix of things can certainly help out generating loads of Super-Fluids...

    --
    Task Mangler