--- Day changed Sat Jun 06 2009
02:35 -!- elias` [n=me@host217-42-207-213.range217-42.btcentralplus.com] has joined #hplusroadmap
06:43 -!- elias` [n=me@unaffiliated/elias/x-342423] has quit [Read error: 145 (Connection timed out)]
06:52 -!- fenn_ [n=fenn@cpe-72-177-123-170.austin.res.rr.com] has joined #hplusroadmap
06:58 -!- fenn [n=fenn@cpe-72-177-123-170.austin.res.rr.com] has quit [Read error: 60 (Operation timed out)]
07:29 -!- fenn_ [n=fenn@cpe-72-177-123-170.austin.res.rr.com] has quit [Read error: 60 (Operation timed out)]
07:38 -!- fenn [n=fenn@cpe-72-177-123-170.austin.res.rr.com] has joined #hplusroadmap
07:39 -!- fenn_ [n=fenn@cpe-72-177-123-170.austin.res.rr.com] has joined #hplusroadmap
07:47 < fenn> i wonder why `wget -rk -np edboyden.org/sb1/` doesnt work
07:47 < fenn_> beats me
07:48 -!- fenn_ [n=fenn@cpe-72-177-123-170.austin.res.rr.com] has quit ["leaving"]
07:51 < fenn> oh it's a wonky redirect to alumni.media.mit.edu
10:36 -!- cis-action [n=cis-acti@dhcp-147-137.harvard.edu] has joined #hplusroadmap
10:40 < kanzure> heh
10:40 < kanzure> http://askaphd.org/
10:40 < kanzure> bah only 19 users
10:40 < kanzure> what a piece of shit
10:56 < nsh> kanz, you have lots of phd emails
10:56 < nsh> why not solicit them all to join
10:59 < Utopiah> posting the link on PhD Comic http://www.phdcomics.com/ could help http://www.alexa.com/siteinfo/phdcomics.com
11:00 < fenn> qtparted
11:06 < kanzure> it's not installed on knoppix
11:39 < fenn> LOVE: http://www.youtube.com/watch?v=Y-A8xvFKaRA
11:40 < fenn> http://www.quelsolaar.com/
11:40 < fenn> eskil steenberg
11:40 < fenn> automatic story/architecture/landscape generation
11:54 -!- elias` [n=me@host217-42-207-213.range217-42.btcentralplus.com] has joined #hplusroadmap
13:00 -!- splicer [n=patrik@h50n2c1o261.bredband.skanova.com] has joined #hplusroadmap
--- Log opened Sat Jun 06 13:16:43 2009
13:16 -!- kanzure [n=bryan@cpe-72-177-123-170.austin.res.rr.com] has joined #hplusroadmap
13:16 -!- Irssi: #hplusroadmap: Total of 20 nicks [0 ops, 0 halfops, 0 voices, 20 normal]
13:17 -!- Irssi: Join to #hplusroadmap was synced in 34 secs
--- Log closed Sat Jun 06 13:18:43 2009
--- Log opened Sat Jun 06 13:23:26 2009
13:23 -!- kanzure [n=bryan@cpe-72-177-123-170.austin.res.rr.com] has joined #hplusroadmap
13:23 -!- Irssi: #hplusroadmap: Total of 20 nicks [0 ops, 0 halfops, 0 voices, 20 normal]
13:24 -!- Irssi: Join to #hplusroadmap was synced in 58 secs
13:29 < kanzure> ok now I don't have any excuse not to use screen
13:42 < kanzure> SYMPA: https://utlists.utexas.edu/sympa/
13:43 < kanzure> ashkenazi papers that I was talking about: http://heybryan.org/books/papers/ashkenazi/
13:43 < kanzure> also has a notes.txt file
14:07 < fenn> my papers folder: http://pastebin.ca/1449973
14:21 < kanzure> rawr give me unit test suite
14:21 < drazak_> screen is awesome
14:36 -!- samrose [n=samrose@c-24-11-214-181.hsd1.mi.comcast.net] has joined #hplusroadmap
14:39 < fenn> kanzure: try `git clone http://192.168.1.86/git/skdb.git/`
14:44 < kanzure> works
14:48 < kanzure> http://ktown.kde.org/~zrusin/git/git-cheat-sheet-large.png
14:51 < kanzure> git-update server info
14:51 < fenn> git update-server-info
14:57 < fenn>  git clone http://192.168.1.87/skdb/.git/
14:58 < fenn> git pull http://192.168.1.108/skdb/.git/ master
15:17 -!- samrose [n=samrose@c-24-11-214-181.hsd1.mi.comcast.net] has quit [Read error: 110 (Connection timed out)]
15:26 < kanzure> a = array([[10,20,30],[40,50,60]])
15:26 < kanzure> a[:,1]
15:26 < kanzure> wtf?
15:27 < kanzure> from numpy import *
15:30 < fenn> 'slartibartfast'.split('a')[:2]
15:30 < fenn> should return ['sl', 'rtib']
15:33 < kanzure> ab = [[10,20,30,40],[50,60,70,80,90]]
15:33 < kanzure> del ab[0]
15:42 -!- samrose [n=samrose@c-24-11-214-181.hsd1.mi.comcast.net] has joined #hplusroadmap
15:47 < kanzure> dynaflexpro
15:48 < fenn> suxtehgoatse
15:48 < kanzure> goatse doesn't do dynamics.
15:58 -!- samrose [n=samrose@c-24-11-214-181.hsd1.mi.comcast.net] has quit ["Ex-Chat"]
16:02 < kanzure> http://www.pokemondb.co.uk/gallery
16:09 < splicer> (that's a lot of pokemons)
16:11 < splicer> fenn: remember when I talked about the pirates in the european parliament?
16:11 < splicer> ...the election is tomorrow
16:16 < kanzure> "An important result from linear graph theory is that the fundamental cutset matrix is row-equivalent to the reduced incidence matrix. In other words, the f-cutset matrix need not be constructed using its definition- it can be obtained through simple row operations on the reduced incidence matrix. Verification of this theorem for the linear graph in fig 2 is left to the reader."
16:16 < kanzure> this doesn't actually say anything, does it?
16:19 < kanzure> all this crap about the identity matrix being partitioned into the cutset matrix is just them being jerks
16:19 < kanzure> basically it's a way of organizing the matrix so that they don't have to order it by hand or something
16:20 < kanzure> because the other part of the matrix that they add to it (with dimensions of (v-1)*(e-v+1)) to the right of it, complements the identity matrix such that the identity matrix's column number for a certain value, plus the values in the remaining columns for a given row, says whether or not those thingies (specified by each column) appear within the same set
16:20 < kanzure> that probably didn't explain anything
16:35 < kanzure> you know, cutsets probably have some sort of non-esoteric application to reliability theory
16:35 < kanzure> i.e. probabilities of certain edges in certain dependencies being cut that really-shouldn't-go-down-all-at-the-same-time etc.
16:39 < wrldpc> anyone have the quicklink to the anti-grav treatment using the enclosed pulley system?
16:58 -!- kardan| [n=kardan@p54BE2E0F.dip.t-dialin.net] has joined #hplusroadmap
17:07 < kanzure> HOW TO FIND FUNDAMENTAL CUTSETS (slide 8/16)
17:07 < kanzure> 1. Redraw the graph with the tree in a straight line. tree=hamiltonian.
17:07 < kanzure> 2. For each tree branch,
17:07 < kanzure> 2a/) place the tree branch in a new f-cutset
17:07 < kanzure> 2b) see what two node groups are formed by cutting that branch
17:08 < kanzure> 2c) place all links in the co-tree that connect these two groups in that cut set.
17:08 < kanzure> dear lazyweb, ..
17:08 < kanzure> this would be easier if I wasn't using an incidence matrix to represent a graph
17:14 -!- kardan_ [n=kardan@p54BE5766.dip.t-dialin.net] has quit [Read error: 110 (Connection timed out)]
17:17 < fenn> "redraw the graph with a tree in a straight line" very funny. ha. ha.
17:27 -!- kardan| [n=kardan@p54BE2E0F.dip.t-dialin.net] has quit [Read error: 110 (Connection timed out)]
17:31 -!- kardan| [n=kardan@p54BE2E0F.dip.t-dialin.net] has joined #hplusroadmap
17:49 -!- jm [n=j@p57B9DD6D.dip.t-dialin.net] has joined #hplusroadmap
18:03 -!- kardan| [n=kardan@p54BE2E0F.dip.t-dialin.net] has quit [Read error: 110 (Connection timed out)]
18:15 -!- elias` [n=me@unaffiliated/elias/x-342423] has quit ["leaving"]
18:51 < fenn> assuming springs are nodes and masses are arcs, the node has a parameter/label/value (the spring constant) and the arc has a value (the mass)
18:54 < fenn> but springs as arcs makes more sense, because you connect things together with springs
19:21 -!- cis-action [n=cis-acti@dhcp-147-137.harvard.edu] has quit []
19:24 < kanzure> http://box2d.org/
19:25 < kanzure> adding in series, multiplying in parallel
19:25 < kanzure> dump assembly graph into box2d input format thingy (or multisim, dynaflexpro, etc.)
19:25 < kanzure> but there doesn't seem to be a sufficient generic tool for static analysis like that
19:26 < kanzure> so generating the equations and then dumping it into graphsynth seems like an ok thing to do.
20:19 < kanzure> s/graphsynth/gnuplot/
20:39 < kanzure> http://www.aero.polimi.it/~mbdyn/index.html
20:41 < kanzure> http://www.vimeo.com/4837929 mbdyn video thingy
21:15 < kanzure> http://tmech.mechatronik.uni-linz.ac.at/staff/gerstmayr/hotint.html
21:32 < kanzure> http://pyode.sourceforge.net/tutorials/tutorial2.html
21:32 < kanzure> so they just call various set mass and set position functions and call stuff spheres or joints, and that's it basically
21:33 < kanzure> but that doesn't really sound right
21:33 < kanzure> all these different dynamic libraries have them in their own special API and then simulate stuff but you have no idea how they are assembling the mechanical assembly or something
21:33 < kanzure> blargh
21:36 < kanzure> #  Simulation method: The equations of motion are derived from a Lagrange multiplier velocity based model due to Trinkle/Stewart and Anitescu/Potra. 
21:36 < kanzure> http://opende.sourceforge.net/wiki/index.php/Manual_(All)
21:55 < kanzure> http://www.google.com/search?hl=en&client=iceweasel-a&rls=org.debian%3Aen-US%3Aunofficial&num=100&q="open+dynamics+engine"+"equations+of+motion"&btnG=Search&aq=f&oq=&aqi=
21:55 < kanzure> er
21:55 < kanzure> http://tankammo.com/xode/
21:56 < kanzure> XML ODE data interchange format
21:56 < kanzure> http://tankammo.com/xode/xode.txt
21:59 < kanzure> see /usr/include/ode/odemath.h
21:59 < kanzure> after:
22:00 < kanzure> apt-get install python-pyode python-pyode-doc libode-doc libode0-dev libode0debian1
22:33 < kanzure> Mechatronic Systems - Modelling and Simulation with HDLs (Georg Pelz, 2003). hrm. I should go stalk this down.
22:37 < kanzure> A survey of customised computer algebra programs for multibody dynamic modelling
22:40 < kanzure> "it is postulated that the sum of forces at every point, and the sum of displacements for every closed loop, are zero, and this leads to development of equations of motion using relationships between forces and displacements"
22:42 < kanzure> [28] contains a "copious compilation" of bond graph references
22:47 < kanzure> Coriolis effects in high-speed robot control?
22:53 < kanzure> "BREEDVELD, P.C. Rosenberg, R. C. Zhou, T. Bibliography of bond graph theory and application". J Franklin Inst. 1991, 328, (5/6), pp. 1067-1109.
23:05 < kanzure> http://mtt.sourceforge.net/examples/Mechanical_rep/index.html
23:05 < kanzure> http://mtt.sourceforge.net/examples/Mechanical_rep/node114.html
23:06 < kanzure> http://mtt.sourceforge.net/examples/Mechanical_rep/node200.html
23:06 < kanzure> there we go
23:07 < kanzure> that looks like what I want..
23:10 < kanzure> generating octave goodness: http://mtt.sourceforge.net/examples/Chemical_rep/node60.html
23:21 -!- jm [n=j@p57B9DD6D.dip.t-dialin.net] has quit [Read error: 113 (No route to host)]
23:27 < kanzure> "polytropic constitutive relationship"
23:27 < kanzure> in /usr/share/mtt/lib/cr/perl/
23:28 < kanzure> apply_cr.pl in that dir is interesting
23:35 -!- ybit [n=heath@unaffiliated/ybit] has quit [Remote closed the connection]
23:57 < kanzure> er
23:57 < kanzure> wtf is this
23:57 < kanzure> http://heybryan.org/~bbishop/docs/InvertedPendulumOnCart_ese.r