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QuantumG | http://www.youtube.com/watch?v=m8PlzDgFQMM | 02:26 |
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JayDugger | TEDxSanJoseCA - Jeff Greason - Rocket Scientist: Making Space Pay and Having Fun Doing It | 04:36 |
LukasDimoveo | linky? | 05:27 |
LukasDimoveo | http://www.youtube.com/watch?v=m8PlzDgFQMM | 05:55 |
JayDugger | Sorry, Lukas. QuantumG dropped the link a few hours before sans title. | 06:00 |
JayDugger | You found it quickly enough. | 06:00 |
QuantumG | he was here when I dropped it | 06:00 |
JayDugger | Oh? | 06:00 |
JayDugger | That doesn't imply his attention. :) | 06:01 |
LukasDimoveo | Hello there | 06:06 |
LukasDimoveo | wow | 06:16 |
LukasDimoveo | excellent video | 06:16 |
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AlonzoTG | http://www.acceleratingfuture.com/michael/blog/2011/04/elon-musk-ill-put-a-man-on-mars-in-10-years/ | 18:32 |
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kanzure | beep | 18:37 |
kanzure | beep | 18:37 |
* kanzure thinks someone forgot to turn off the timer | 18:37 | |
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AlonzoTG | ... | 18:52 |
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AlonzoTG | So what do you think of that croaking noise Anissimov made? | 18:52 |
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JayDugger | Good night, everyone. | 19:45 |
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kanzure | "For same_side overlap, I revert all the intersection curves of the second patch which overlaps to the number before projection" what? | 20:05 |
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delinquentme | typically whats the smallest volume of liquid being dispensed into a microtiter plate ( 96 well ) | 20:15 |
kanzure | microliters are pretty common | 20:15 |
delinquentme | yeah the 96 wells max out at 400 ml .. with samples typically being between 100 and 200 ml | 20:20 |
delinquentme | so im wondering do the measurements get as small as 10 ml? | 20:20 |
delinquentme | 1 ml? .. or are we talking sub- ml | 20:20 |
kanzure | i've never done a plate with sub-ml measurements involved | 20:27 |
kanzure | but there are probably lots of different well plate standards that have smaller wells for smaller volumes | 20:28 |
delinquentme | oh absolutely | 20:29 |
delinquentme | ok so 1 ml should be safe. | 20:29 |
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kanzure | why would you set hard limits like that? | 20:59 |
kanzure | just implement units in your code | 20:59 |
kanzure | especially for the abstract "plate standard" class, etc. | 21:00 |
delinquentme_ | nah its more like | 21:04 |
delinquentme_ | well... tis a hardware issue | 21:05 |
delinquentme_ | assuming that the motors driving the system have physical limitations | 21:05 |
delinquentme_ | i need to spec out the torque and step rotation of this motor around the smallest unit i need it to handle | 21:06 |
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delinquentme_ | *coughs* | 21:35 |
delinquentme_ | ahem. so lol | 21:35 |
delinquentme_ | 1. wolfram alpha rocks | 21:35 |
delinquentme_ | 2. | 21:35 |
delinquentme_ | its a hella small number | 21:35 |
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fenn | delinquentme_: for future reference, "ml" is milli liter, aka 1/1000 liter, "ul" is micro liter, 1/1000000 liter | 22:01 |
fenn | it's hard to dispense less than 2ul repeatably with a standard pipettor | 22:01 |
delinquentme_ | fenn, yeah i got my units crossed :D | 22:02 |
delinquentme_ | oh | 22:02 |
delinquentme_ | really! | 22:02 |
delinquentme_ | thats good to know. | 22:02 |
delinquentme_ | i just ran the math through wolfram .. and well haha .. the linear distance to move this spindle for 1ml is ... hella small | 22:02 |
fenn | you did it again | 22:03 |
kanzure | fenn makes a good point though, most pipettes in molecular biology are giong to be microliter-range | 22:03 |
kanzure | but you should look up the volumes of the wells in your plates.. if it's anything near ml then microliter range probably won't matter | 22:04 |
fenn | yeah typical hand pipettors are 2-20ul, 20-200ul, 100ul-1ml | 22:04 |
kanzure | fenn: what strategy would you pick if you were implementing "boole"? de-novo implementation, or rewrite their c code? | 22:05 |
fenn | what's wrong with the existing code? | 22:05 |
kanzure | i've been able to run their code and i have it mostly outlined/understood.. sort of. there's a few fuzzy parts | 22:05 |
kanzure | the licensing | 22:05 |
fenn | isn't it bsd-ish? | 22:06 |
kanzure | the lack of comments | 22:06 |
kanzure | lack of unit tests | 22:06 |
fenn | so add comments and unit tests | 22:06 |
kanzure | it's "do whatever you want, except commercial" | 22:06 |
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fenn | oh, well that's stupid | 22:06 |
kanzure | well there's your answer | 22:06 |
fenn | rewrite it in cython :P | 22:06 |
kanzure | i also get the feeling that a lot of this is redundant | 22:07 |
delinquentme_ | agh. | 22:07 |
fenn | redundant? | 22:07 |
kanzure | there's these huge chunks where they "do something for first_solid" and then they copy/pasted and "did it for second_solid" | 22:07 |
fenn | because there's no inheritance in C? | 22:07 |
kanzure | but some parts are put into functions | 22:07 |
kanzure | well, that's another issue, but specifically just because nobody bothered to simplify this | 22:07 |
kanzure | imho the main function should just be a list of function calls that do the real heavy work | 22:08 |
kanzure | not a mix of hundreds of embedded for loops and while loops, calling different functions once in a blue moon | 22:08 |
fenn | agreed | 22:08 |
fenn | (i havent looked at the code) | 22:08 |
kanzure | in particular i'm talking about boole-1.1/surface/perf_csg.c | 22:08 |
kanzure | ftp://ftp.cs.unc.edu/pub/projects/boole/boole-1.1.tar.gz | 22:09 |
kanzure | at line 1380 | 22:09 |
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fenn | yeah, well, enjoy :P | 22:10 |
kanzure | to be fair, their CalculateImplicit is not awful | 22:10 |
kanzure | it computes an array that represents a matrix where the determinant is the implicit form of what was once a parameterized bezier surface | 22:10 |
kanzure | i'm a little worried about how in the papers they are super excited about computing a union between two solids IN EIGHT SECONDS!! | 22:12 |
kanzure | from 1994ish.. on sgi onyx machines (pokeball go!) | 22:12 |
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fenn | i think brep csg is probably just going to be slow | 22:12 |
fenn | unless you parallelize it | 22:12 |
kanzure | it turns out they were making a model of a submarine... | 22:12 |
kanzure | they thought it would be a good idea to make the entire submarine model one giant brep | 22:13 |
kanzure | including all of the inner mechanisms, manifolds, gauges, piping, etc. | 22:13 |
kanzure | i don't understand the utility of that :( | 22:13 |
kanzure | so here's what i have: | 22:15 |
kanzure | (1) a map of the source code with some extra stuff documented (on paper) | 22:15 |
kanzure | (2) a fairly accurate outline of the algorithm presented in their papers (on paper) | 22:16 |
kanzure | so i'm trying to guess if decyphering the code will be more of a pain in the ass than just writing everything on my own | 22:17 |
fenn | what good does deciphering their code do if you're not going to make a copy? | 22:21 |
kanzure | well i consider code to be somewhat more legible than a paper =p | 22:21 |
kanzure | oh, rewriting the code could mean i get to check if my implementation is exact (otherwise i'll have to come up with some way to check my work incrementally) | 22:27 |
fenn | you mean use the existing implementation's output as a "known good" example | 22:28 |
kanzure | yep.. and it compiles (amazing) | 22:28 |
kanzure | i really don't like these coding projects where i can't quickly check my work.. | 22:30 |
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kanzure | http://diyhpl.us/~bryan/irc/boole_notes.txt | 22:46 |
CryptoQuick | "would you miss it? would you miss it?" | 22:56 |
kanzure | dunno what PartitionSplinegon does.. or why they called SubdivideTrimCurve | 22:56 |
kanzure | presumably all of these edge cases are important but if they are why is it so undocumented | 22:56 |
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sbailard_ | Hi all! | 23:14 |
CryptoQuick | o/ | 23:15 |
sbailard_ | All is well? I've been a bit quiet on irc, wrists were bothering me but seem to be better. | 23:16 |
CryptoQuick | I wouldn't know, I lurk the hell outta this place :P | 23:17 |
sbailard_ | hi kanzure! Busy? | 23:18 |
sbailard_ | Well, I'm crawling towards being a grown up, just installed virtualbox to get started on learning django. | 23:18 |
CryptoQuick | oh sweet | 23:18 |
CryptoQuick | python <3 | 23:18 |
CryptoQuick | you know, a great platform for web apps that are purely web apps would be App Engine | 23:19 |
sbailard_ | hmm. | 23:22 |
sbailard_ | Interesting. Are you part of the gitduino crew? | 23:22 |
CryptoQuick | nah, I'm just a space & code fanatic | 23:23 |
CryptoQuick | also, interested in improving how we manufacture things and do stuff and all that, you know, solving the world's problems in an IRC chat room | 23:23 |
sbailard_ | :D | 23:23 |
CryptoQuick | :) | 23:24 |
sbailard_ | Ah. I'm just focused on solving reprap's documentation problems. Which is fun. | 23:24 |
CryptoQuick | I've always been intrigued by RepRap, but now I've become more entrenched in auxon systems, stuff that performs ISRU, then whittles down the results into more machines, in addition to useful things | 23:25 |
* sbailard_ googles. | 23:25 | |
CryptoQuick | I like this article: | 23:26 |
CryptoQuick | http://discovermagazine.com/1995/oct/robotbuildthysel569 | 23:26 |
sbailard_ | Ah. You should built a reprap and work on printing them. | 23:28 |
CryptoQuick | well, sorta... this doesn't really deal with additive systems; check this out: | 23:30 |
CryptoQuick | http://i.imgur.com/tUZar.png | 23:30 |
CryptoQuick | ain't that sweet!? :D | 23:30 |
CryptoQuick | just throw a bunch of dirt into a fancy furnace, perhaps a solar furnace, and have it come out into its constituent metals | 23:31 |
sbailard_ | That is interesting. | 23:31 |
sbailard_ | Hey, do you know about metallicarap? | 23:32 |
CryptoQuick | no, what's that? | 23:32 |
sbailard_ | ebeam powder printer | 23:32 |
sbailard_ | http://reprap.org/wiki/MetalicaRap | 23:32 |
CryptoQuick | whoa... | 23:33 |
CryptoQuick | one goal I had for designing a self-replicating systems was, I wanted to keep the number of parts using copper and rare metals down; I didn't want to hamper the system's self-replication beyond its ISRU capabilities. I was thinking of using hydraulic or pneumatic parts. I've seen some RepRap designs use this sort of thing... | 23:36 |
sbailard_ | You've still got *something* driving that hydrau/pressure line. | 23:37 |
sbailard_ | I'd suggest bodging together a t-slot bot or wooden repstrap and get to hello world ... | 23:37 |
CryptoQuick | I'm not as concerned about that as I am about the interface between the controller and the fluid | 23:37 |
CryptoQuick | :) | 23:37 |
sbailard_ | What kind of tooling do you have right now? | 23:40 |
CryptoQuick | SolidWorks ;D | 23:40 |
sbailard_ | Ah. It will be difficult to bootstrap that into a fabricator. | 23:40 |
CryptoQuick | well, I have access to a bunch of tooling and resources and people who know how to make things at school; we have a strong industrial design workshop | 23:41 |
CryptoQuick | they have an FDM machine also | 23:41 |
sbailard_ | According to some folk Solidworks, and all non-floss cad may be ideologically impure. | 23:41 |
CryptoQuick | true, quite true | 23:42 |
sbailard_ | that's when I yell at said folks: "Then don't use it. But trying to get people to swap tools is nuts." | 23:42 |
sbailard_ | where are ya? | 23:42 |
CryptoQuick | it's fun to use, but do you prefer any other good CAD or CAD-like programs? | 23:42 |
CryptoQuick | I'm in Denver, CO | 23:42 |
sbailard_ | I'm sniffing at free-cad. | 23:43 |
sbailard_ | A substantial fraction (40-60%) of reprap is using openSCAD, but everyone may be using a different toolset tomorrow. | 23:43 |
CryptoQuick | openscad looks like it's good once you have the idea set out | 23:44 |
CryptoQuick | I'mma check out FreeCAD, it looks promising :D | 23:45 |
sbailard_ | Heekscad had some fans as well. | 23:45 |
kanzure | O_o you guys decide tools based on popularity? | 23:50 |
kanzure | god this world sucks | 23:50 |
sbailard_ | bwahahah! | 23:50 |
sbailard_ | no. | 23:50 |
CryptoQuick | :D | 23:51 |
sbailard_ | More: I used this tool for my stuff. Try it. | 23:51 |
kanzure | i don't see why you would use freecad over heekscad | 23:51 |
sbailard_ | I still need to get deep with one or the other. | 23:52 |
kanzure | freecad and heekscad both use opencascade so essentially they are just different UIs, but last i looked heekscad was more complete | 23:52 |
sbailard_ | That's the consensus I've seeen. | 23:52 |
kanzure | your opinion doesn't count because it's decided by popularity | 23:52 |
CryptoQuick | heekscad, why u no maek mac binary??? | 23:52 |
kanzure | CryptoQuick: http://code.google.com/p/heekscad/wiki/CompilingForMacOSX | 23:53 |
CryptoQuick | ~binary~ | 23:53 |
sbailard_ | I agree with you that my opinion doesn't really count when some mech-eng student parachutes into the reprap project. | 23:53 |
sbailard_ | You get a tiny chunk of the hivemind waving openscad at them, and then they rabbit off and go do stuff in solidworks or similar. | 23:54 |
sbailard_ | How goes gitduino-development, btw? I just installed virtualbox on my new laptop and will be having a go at django. | 23:55 |
kanzure | why are you installing django? | 23:55 |
kanzure | realistically i should just refer to our last chat log since i'm not sure you understood what was going on | 23:55 |
kanzure | and that's basically the latest. | 23:56 |
sbailard_ | I thought that was the webframeworks that would be wrapping around gitduino. | 23:56 |
kanzure | yeah i'm pretty sure that's not the conversation we last had. | 23:56 |
sbailard_ | wrapping around ikiwiki, I meant. | 23:56 |
sbailard_ | ah. I am embarrassed. | 23:56 |
sbailard_ | And I'm glad I'm checking in. | 23:56 |
kanzure | piny? that's perl | 23:56 |
sbailard_ | yes. | 23:56 |
kanzure | not django | 23:56 |
sbailard_ | and piny is not a webframeworks? | 23:57 |
kanzure | it's best described as git hosting | 23:57 |
sbailard_ | and .... do we have a web frameworks we'll be using along with piny? To do things like integrate the forum and piny into a general website? | 23:58 |
kanzure | sigh | 23:59 |
sbailard_ | sorry. | 23:59 |
kanzure | do whatever you want. | 23:59 |
kanzure | can you just read our last conversation instead? | 23:59 |
sbailard_ | Yeah, I'll do that. | 23:59 |
--- Log closed Mon Apr 25 00:00:10 2011 |
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