--- Day changed Thu Apr 29 2010
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02:21 < bkero> MIT OpenCourseware
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05:55 < kanzure> bkero: ocw.mit.edu doesn't have any neuroscience classes in audio format that are relevant except like this weird "neuroscience of behavior" class.
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07:02 < kanzure> fenn: anselm has posted to diybio in a thread with the subject "Fast-acting transcriptionalregulation by light responsive elements"
07:02 < kanzure> i don't remember if you told asked him to build you a writozyme or not
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08:11 < fenn> yeah i explained the concept to him in a few different contexts
08:13 < fenn> you broke that thread :(
08:14 < fenn> oh, there's something weird with the headers
08:23 < fenn> so i've been lying here not sleeping and thinking about VR rigs.. kinematic/haptic body frames and how to control massive numbers of micro-bladders
08:24 < fenn> i think you would need some kind of fractal bladder structure to get enough travel and also detail
08:24 < fenn> thinking about using lab on chip valve techniques to control them.. flexible layer over a channel with a piezo pushing on it. still requires a lot of piezo actuators though
08:25 < fenn> but at least they can be made in "comb" modules of a hundred or so in a single piece; simplifies wiring by a couple orders of magnitude
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08:29 < fenn> the bladder kinematics is a nightmare
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08:47 < kristianpaul> any news about skdb?
08:47 < kristianpaul> features or something
08:51 < fenn> nobody's done anything with skdb in months
08:56 < fenn> hmm.. "thermo-responsive hydrogel valves"
09:00 < fenn> phase change waxes might be more practical
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09:05 < JayDugger> Gasp! Has skdb died?
09:08 < JayDugger> Time to write a panic tweet, follow it up with half a dozen exquisitely reasoned blog posts for analysis, and post irresistible flame-bait everywhere I can!
09:09 < fenn> thanks for your show of support
09:10 < JayDugger> Just doing my part. :)
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09:23 < fenn> the microactuator array consists of individual phase-change based actuators addressed by localized heating through focused light patterns (address bus), which can be provided by a modified projector or high power laser pointer. A common pressure manifold (data bus) for the entire array is used to generate large deflections of the phase change actuators in the molten phase
09:24 < fenn> or cheapie LCD screen presumably
09:24 < fenn> power input is proportional to actuator size
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16:15 < fenn> iron man 2 eh
16:16 < QuantumG> yeah.. guess I should go see it
16:17 < fenn> "in which our hero iron man actually fights some bad guys"
16:20 < fenn> so i'm thinking about a flexible suit made entirely of hexagonal bubbles which can be inflated with fluid to cause that surface to contract and put force on a limb
16:20 < fenn> it's godawful complex to control though, would have to do some kind of learning algorithm i think
16:21 < fenn> not really for exoskeleton stuff because you're still loading the human bones, more for VR
16:21 < fenn> s/exoskeleton/jumping over buildings/
16:21 < fenn> inspiration is the eldar armor in wh40k (not like anybody knows wtf i'm talking about)
16:21 < QuantumG> a force feedback suit?
16:25 < fenn> right
16:26 < QuantumG> intending to move you under computer control right?
16:26 < fenn> i made a little diagram showing how the bubble would contract: http://fennetic.net/irc/hex_bubble.svg
16:27 < QuantumG> so is this pneumatic?
16:28 < fenn> i've long thought the focus on position control in robotics was self defeating
16:28 < fenn> for most applications force is what you're after, and as a bonus it's easier to control anyway
16:29 < fenn> probably hydraulic because it has less springinessD[D[D[D[D[D[D[D[D[D[D[D[D[D[D[D[D[D[D[D[D
16:29 < QuantumG> right, but you expect feed lines running from each hexagonal bubble to a pump system somewhere.. 
16:30 < fenn> yeah
16:30 < fenn> hence all the rambling about light gated microfluidics
16:30 < kanzure> wtf it's fenn! http://photos3.meetupstatic.com/photos/event/3/c/6/7/highres_14655463.jpeg
16:31 < fenn> stalker
16:31 < kanzure> no i just happen to like kite boarding
16:31 < fenn> uh huh
16:32 < kanzure> some of the austin hackerspace people are going to a rave
16:33 < kanzure> should i tag along? i've never been to a rave
16:33 < kanzure> screw this.. there's a *fee*??
16:34 < bkero> lol
16:34 < bkero> Go to rave.
16:34 < bkero> Meet a hoochie.
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16:35 < fenn> kanzure: do you like to dance? (yes/no)
16:36 < bkero> kanzure: do you like to dance? ([yes]/no)
16:36 < fenn> why is yes the default choice?
16:37 < bkero> Because if he doesn't respond we assume yes.
16:37 < fenn> kanzure: anyway, i'd suggest going to a rave if only to acquire some subjective experience in MDMA
16:38 < fenn> er, if your friends are into that sort of thing
16:41 < fenn> or you could stay home and listen to tranceport 4, which is on tub *cough internet down cough*
16:42 < fenn> you'd think hacker dojo would have a less sucky internet connection, considering all these people do is software
16:43 < kanzure> software in a vacuum probably just means they are microsoft drones?
16:43 < bkero> Maybe they're torrenting
16:43 < fenn> rate limited to 60KB/s burst 120Kb/s
16:43 < bkero> Or microsoft drones, I like that explanation better.
16:43 < bkero> Why the hell would you rate limit like that?
16:43 < bkero> Can they not figure out how QoS works?
16:44 < fenn> well that's what it seems.. there's no documentation anywhere
16:44 < kanzure> i spent the day at dave rauchwerk's machine shop
16:44 < kanzure> it's across the street from endesign / austin hackerspace
16:44 < kanzure> literally..
16:44 < kanzure> he has a nice bridgeport
16:45 < kanzure> he wants to start doing diybio kits
16:46 < kanzure> so i had him and dr. treadwell planning things out while i napped (just woke up)
16:47 < fenn> has he got the mill working yet?
16:47 < kanzure> i didn't see it working but yeah i think so
16:48 < fenn> did you know treadwell has the 7th makerbot ever built?
16:48 < kanzure> yes
16:48 < kanzure> :)
16:49 < kanzure> he painted over the number too
16:49 < kanzure> painted or did something else equally silly like that
16:49 < fenn> oh well
16:49 < fenn> in 50 years it'll be junk
16:49 < kanzure> 50? why so many
16:50 < fenn> it already is junk :x
16:50 < fenn> but somewhere in between now and 50 years from now it'll be a "collector's item"
16:50 < fenn> scary huh
16:52 < fenn> math notation suxxors
16:52 < kanzure> notation eh
16:52 < fenn> this crap would be 90% easier in lisp
16:52 < kanzure> are you using latex?
16:53 < fenn> i'm just trying to read it and understand what's going on
16:53 < fenn> there should be some rule like "you have to repeat every equation in prose" or something like that
16:54 < kanzure> or else socrates rises from the grave to beat the fuck out of you
16:54 < fenn> yeah, socrates. the original badass
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17:26 < fenn> bkero: oi you have lots of servers right? can i get shell access to do various small compute-intensive tasks like computing toolpaths?
17:27 < fenn> it's more of a latency thing "crap now i have to wait five minutes to compile" than massive quantities of crunching
17:36 < bkero> fenn: Yea sure
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18:15 < fenn> bkero: ok lemme know the details whenever
18:15  * kanzure needs to integrate google checkout into a django module
18:15 < kanzure> any hints?
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18:16 < kanzure> i'd rather not have to reinvent the wheel
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18:18 < fenn> kanzure: satchmo is supposed to do that by default
18:20 < kanzure> yes but i'm doing an auction site
18:20 < kanzure> so the satchmo shopping cart model doesn't really work well (?)
18:20 < fenn> oh, well, i'd read more about it anyway
18:20 < kanzure> i'm surprised there's no django auction app thing
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18:21 < fenn> there's not that many auction sites
18:21 < kanzure> ebay *bought* paypal
18:21 < fenn> yeah they're huge and certainly a monopoly by any reasonable definition
18:21 < kanzure> btw why doesn't anyone ever notice that ebay sucks from a web presence point of view?
18:21 < kanzure> like, their website is all blahblahblah.dll and click here click here
18:22 < fenn> yeah it's horrible
18:22 < kanzure> i guess a bunch of perl cobbled together in 1995 is bound to be terrible
18:22  * kanzure ducks hoping jrayhawk isn't around
18:22 < fenn> and it'll never ever get fixed because so much crap software relies on the awful
18:22 < kanzure> (jrayhawk is 90% perl)
18:22 < fenn> perl sucks
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18:23 < fenn> perl reminds me of digging in the scrapyard for pretty baubles
18:23 < kanzure> so uh, i'm venture funded now
18:24 < fenn> gratz, wat for?
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18:24 < kanzure> iphone app http://www.youtube.com/watch?v=RB9wWpD9gj8
18:24 < fenn> is this what all the lawyering was about?
18:24 < kanzure> sadly no
18:25 < kanzure> i met with the dla piper lawyer re: compensation structure regarding structory, an online 80/20 distributor
18:25 < fenn> i tried to watch that several times but it was too painful :(
18:25 < fenn> isn't renee a "filmmaker"?
18:25 < kanzure> yes
18:25 < kanzure> mtv, yo
18:25 < kanzure> http://rjpinnell.info/
18:26 < kanzure> anyway, he wants me to work 10 hours day and have at minimum 2 hours devoted to meetings each day during the summer
18:26 < kanzure> this is, of course, bullshit
18:26 < fenn> then why does his promo video suck so much
18:26 < kanzure> it wasn't a promo
18:26 < kanzure> it was for the capital factory peeps
18:27 < kanzure> anyway, i need to show him some local startups or something
18:27 < kanzure> or else i'm off.. no way i'm going to spend my summer in meetings
18:27 < fenn> bacon_factor = 3
18:27 < kanzure> ?
18:27 < fenn> oh, "tribe level"
18:28 < kanzure> i (don't?) like how they completely cut me from the video
18:28 < kanzure> i filmed and everything
18:29 < fenn> rene reminds me of the boss in office space
18:29 < kanzure> since i'm a founder i should have a say in the matter
18:29 < kanzure> the iphone app works :)
18:29 < fenn> i dont get how you can spend 10 hours a day on an iphone app anyway
18:29 < kanzure> me either
18:30 < kanzure> i guess if your minimum meeting length is 2h
18:30 < kanzure> you might have multiple meetings?
18:30 < fenn> yeah that's absurd
18:30 < fenn> you should have maximum meeting lengths, not minimums!
18:30 < kanzure> 30min once a week and then gtfo of my house
18:31 < fenn> and maximum numbers of scheduled meetings
18:31 < kanzure> fool! we should have multiple simultaneously parallel meeting schedules!
18:31 < kanzure> that way we can get twice the work done!~
18:31 < fenn> well, parallel meetings are actually better
18:32 < fenn> but there's only 4 people so meh
18:32 < kanzure> yeah, so one of the things i need to be doing is server stress testing
18:32 < kanzure> we're aiming to do stress testing for up to 10k users by the summer's end, with scalable support around that time
18:32 < kanzure> or, rather, that's my aim
18:33 < fenn> give away $100k of stuff if you click a button within the allotted time
18:34 < fenn> hah
18:34 < kanzure> ?
18:34 < fenn> would probably nuke the ISP
18:34 < kanzure> oh it's "in the cloud"
18:34 < fenn> with aftershocks from people in the wrong timezone
18:36  * fenn continues regressing
18:36 < kanzure> so uh
18:36 < kanzure> yeah.. sorry about the phone call
18:36 < fenn> ugh
18:36 < kanzure> heh
18:37 < fenn> i should mail you a stinkbomb for that
18:37 < kanzure> what a terrible technology
18:37 < kanzure> actually, mac was thinking of using this for distributed text-message instructions
18:37 < kanzure> for doing various projects in skdb
18:37 < kanzure> but frankly i don't know why anyone would follow the instructions
18:37 < kanzure> "get a pound of flour"
18:37 < kanzure> "get some icing"
18:37 < kanzure> "make a cake"
18:38 < fenn> email is better
18:38 < kanzure> nah the text messages would be sent if you are in the vicinity of, say, a grocery store
18:38 < fenn> if your phone has GPS it can read email
18:38 < kanzure> location-based bullshit
18:38 < kanzure> eh
18:38 < kanzure> yes
18:39 < kanzure> so anyway.. auction site. django stuff.
18:39 < fenn> find the hessian of d(l(theta))/dx = d(sum(y[i]*log(h(x[i]))+(1-y[i])*log(1-h(x[i])), 1, m))/dx
18:40 < kanzure> i don't wanna
18:40 < fenn> i've been doing this problem for 2 weeks :(
18:40 < fenn> :C
18:46 < klafka> oh jesus
18:47 < klafka> that seems like an annoying hessian
19:00 < fenn> it's actually not so bad, the annoying thing is it's all n dimensional which is too much for my poor brain
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19:07 < JayDugger> Good evening, everyone.
19:08 < kanzure> hello
20:14 < JayDugger> Good night, everyone.
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20:34 < kanzure> does anyone know a print-to-fax web service?
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21:59 < fenn> guh.. http://fennetic.net/irc/IMG_0649.JPG
21:59 < fenn> gotta love math problems that pull in definitions you didn't know about
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22:16 < genehacker> what's that math for?
22:25 < genehacker> also found some ballscrews, any recommendations for what I should do with them?
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