[ ... ]

hello my name is ivan and
I like viruses and evolvable programs
and things like that.

I'm a regular at razmjenavjestina hacklab.

you can see more about what I do from
screenshots then from blogposts







[ contact ]

Mail   : lesh@sysphere.org GPG 96085C00

Jabber : [online] lesh@sysphere.org / sysphere@conference.sysphere.org
ICQ    : [online] 137330597
IRC    : [offline] sysphere.org:6697, ssl only, #sysphere

gpg key




[ .. ]

Mon, 04 Jan 2010 --> bigdog is obsolete?


things I've learned:
need two motors per four leggs, not one,
need stronger joints.
and I probbably don't need expensive motor speed controllers I bought.

gallery has been and will be updated periodically.

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

how does it turn/why am I holding it with a piece of wood?
this is just left part of the body.

posted at: 22:51 | path: /proj/robotics/klann1 | permanent link to this entry




Mon, 04 Jan 2010 --> klann walker!


I'm working on 8 legged, large spider-like robot (1.5x1.5 meters, about 50kilos)
Starting with a wooden prototype as opposed to computer simulations/cad drawings,
in order to save time.

gallery, will be updated as I progress.

and a short video
http://www.youtube.com/watch?v=DAWtSfaqgIA

this leg design is called "klann linkage"

just a prototype of a prototype, still walking kinda crappy.

posted at: 20:58 | path: /proj/robotics/klann1 | permanent link to this entry




Sat, 05 Dec 2009 --> rorschach generator


after looking at the rorschach test, I wanted more.
supirisingly, I couldn't find any rorschach generators online,
so, python, tkinter and randomwalk with random size blobs and simmetrical reflection,
I thought that some tweaking or more complicated algorithm would be needed but this works great.

click on a canvas for (re)generation.

examples and source.

posted at: 04:00 | path: /play | permanent link to this entry




Wed, 02 Dec 2009 --> automatic generation of desktop backgrounds.


while looking at context free art I was thinking wow those pictures are very nice and I want them on my
desktop and on my walls and all over my body. 
(its a context free language used to describe recursive patterns whose execution is then represented by
images. images that tend to look natural and lifelike because lifelike things tend to describe
themselves in similar ways.)

when talking about things in this language, its all about probabilities and not about fixed
values, so every time a picture is generated from the same description, it looks different!

SO: hourly wallpaper generation.
here is my /etc/cron.hourly/wallpaper.sh:

#!/bin/bash

/usr/bin/cfdg -w 1680 -h 1050 /etc/wallpaper/symchasm.cfdg /tmp/b.png && /usr/bin/display -window root /tmp/b.png
logger "new wallpaper generated."
I have tiling wm so this is useless for me. but, just a thought.

posted at: 17:59 | path: /crap | permanent link to this entry




Tue, 01 Dec 2009 --> evolving prisoner's dilemma solution





30 selfish prisoners having sex and mutating. WHOA.
very basic evolutionary algorithm, a last night's play.

a problem:

Will the two prisoners cooperate to minimize total loss of liberty, or will one of them,
trusting the other to cooperate, betray him so as to go free?

In the iterated prisoner's dilemma the game is played repeatedly.
Thus each player has an opportunity to "punish" the other player for previous non-cooperative play. 
Cooperation may then arise as an equilibrium outcome.

solutions:

"morality" evolved, but I didn't get tit for tat wich I originaly expected,
(or any long-term stable strategy) A cooperating species evolves out of an uncooperating environment,
and all is nice until an evil mutated agent is born. an agent that successfily exploits the current
dominant species. a parasite quickly spreads and kills off the whole species and itself.
I haven't explored it in detail yet.

I'll post more info and code later or never.
screenshot and someone with different and more serious? approach.

posted at: 17:59 | path: /play | permanent link to this entry





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[ links ]

Anrxc, razmjena vjestina, The church of subgenius, res qualia, Hacktivisimo
DataMining cult of the dead cow, tor, lcamtuf, rootkit.com
invisible things, .aware, a softer world, radioheadoldsite