highaltitude.log.20080404

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[00:05] <edmoore> fnoble: I did exercise 1.1
[00:05] <edmoore> it's all down hill from now
[00:05] <edmoore> enlightenment here we come
[00:05] <edmoore> so whats with the sstl stuff?
[00:06] <fnoble> dunno, i cant remember asking jenny about work there?!
[00:06] <fnoble> what lang did you do it in?
[00:07] <edmoore> no the discrete maths!
[00:07] <edmoore> i did the first 4/5 of project euler one evening about this time last year
[00:07] <edmoore> and havn't done any since
[00:07] <edmoore> but might try and bash through a few
[00:07] <edmoore> i did them in matlab/octave
[00:08] <edmoore> I remember thinking when I got to 6 that I was out of the warmup phase and would attempt the next one tomorrow
[00:08] <edmoore> that was about 356ish days ago
[00:08] <fnoble> heh
[00:09] <fnoble> try and do them in haskell, they are the types of problems that functional programming is amazing for
[00:09] <fnoble> will be a good way to learn
[00:10] <edmoore> yes this is what made me bring up the convo!
[00:10] <edmoore> I was thinking of doing them again in haskell
[00:10] <edmoore> is it reasonably easy to pass things like csv files into haskell?
[00:11] <edmoore> I remember seeing that involved at some point
[00:11] <fnoble> yeah, easy enough, there is a regex library as standard i think
[00:11] <edmoore> maybe I'll flick between c++ and haskell
[00:11] <fnoble> mmm
[00:12] <edmoore> or just commit!
[00:12] <edmoore> don't eat me
[00:12] <edmoore> does vim have syntax awareness for haskell?
[00:18] <fnoble> yeah
[00:23] <akawaka> pfff
[00:31] <edmoore> akawaka: are you ok over there?
[00:36] <fnoble> this is why haskell is awesome: the entire fib sequence defined in one line
[00:36] <fnoble> fiblist = 0 : 1 : (zipWith (+) fiblist (tail fiblist))
[00:37] <edmoore> oh will you go away
[00:37] <edmoore> I'm doing them all with c++
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[00:37] <edmoore> and it takes longer
[00:39] <fnoble> heh, sorry
[00:49] <fnoble> 2 down
[00:50] <fnoble> 7 lines and counting :)
[00:50] <edmoore> I can't get the write number, and don't want to look at my matlab code
[00:50] <edmoore> it's must be something silly
[00:50] <edmoore> what is the numerical answer to 2?
[00:50] <edmoore> to see if I'm totally out of 1 out
[00:50] <edmoore> or*
[00:51] <fnoble> 4613732
[00:51] <edmoore> ty
[01:10] <edmoore> ah!!!
[01:10] <edmoore> 4000000
[01:10] <edmoore> not 40000000
[01:11] <edmoore> i need a beer
[01:46] <fnoble> edmoore: hows it going?
[01:47] <edmoore> I wrote my square root seive thingy for 3
[01:47] <edmoore> then have been on the phone for about 30 + mins
[01:47] <edmoore> so not so well :)
[01:47] <edmoore> you?
[01:47] <fnoble> trying to think of a clever way of doing 3
[01:47] <fnoble> no luck
[01:47] <fnoble> did 6 in the mean time
[01:47] <edmoore> I can only think of the square root then seive
[01:48] <edmoore> I too thought for a bit about a cleverer way
[01:48] <fnoble> hmm, will try that then
[01:49] <fnoble> might be able to do that with some nice list based recursion
[01:49] <fnoble> to get the full decomposition
[01:49] <edmoore> I tried dynamically generating the list recursively
[01:49] <edmoore> but it was slower than seive
[01:50] <edmoore> but that could have been cause of my frilly bits rather than the algorithm itself
[01:50] <edmoore> I am not donald, so do not know
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[02:18] <fnoble> night all
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[17:02] <Laurenceb_> hi ed
[17:02] <edmoore> hi Laurenceb_
[17:03] <Laurenceb_> just been doing a bit of construction work
[17:03] <edmoore> oooh
[17:03] <Laurenceb_> ha
[17:03] <Laurenceb_> its kind of annoying
[17:03] <Laurenceb_> some of the felt is going
[17:04] <Laurenceb_> we're going to have to take off part of the roof
[17:04] <edmoore> eek
[17:04] <Laurenceb_> the floor has just been replaced
[17:04] <Laurenceb_> so its a really nice finish - tongue and groove
[17:05] <Laurenceb_> hopefully the tiles can be taken off from the top, so it wont mess up the floor
[17:05] <Laurenceb_> the the electrician drilled into a load of pipes
[17:05] <Laurenceb_> its a disaster :(
[17:06] <edmoore> you don't think much of this electrician do you :)
[17:06] <edmoore> he sounds pretty bad
[17:06] <Laurenceb_> he is
[17:07] <Laurenceb_> we're using plastic microbore for the plumbing, its really cool stuff
[17:07] <edmoore> brb
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[17:15] <edmoore> back
[17:18] <Laurenceb_> me 2
[17:19] <Laurenceb_> the other problem is that part of the new roof over the extension has dry rot
[17:19] <Laurenceb_> even tho it was built in january
[17:20] <Laurenceb_> we think it can jsut be treated with fungiside
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[17:25] <Laurenceb_> but the roofer wants it replaced
[17:25] <edmoore> eek
[17:25] <Laurenceb_> only some of the wood is effected, but as its nailed together, its hard to see how it can be done
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[17:26] <Laurenceb_> I'm not convinced a little bit of dry rot on the surface is going to damage it, its just as its been left to get damp for a few months, and there are loads of the spores around the place
[17:27] <Laurenceb_> fungiside + drying it should be fine IMO
[17:29] <Laurenceb_> I was talking to a guy on #electronics about rockets
[17:29] <Laurenceb_> he wants to make a kerosene lox engine
[17:29] <edmoore> easier said
[17:30] <Laurenceb_> using a regeneratively cooled copper nozzel
[17:30] <Laurenceb_> sounds interesting, he claims hes made some prototypes
[17:30] <Laurenceb_> using electodeposition
[17:31] <Laurenceb_> its made almost completely from copper, with a spiral track for the fuel built up around the nozzel
[17:32] <edmoore> impressive
[17:32] <Laurenceb_> I'm not sure how strong it would be
[17:32] <Laurenceb_> but the manufacturing process sounds good
[17:33] <Laurenceb_> a mixture of was and graphite is used
[17:33] <Laurenceb_> wax*
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[17:33] <Laurenceb_> then you can make moulds from wood
[17:33] <Laurenceb_> molds*
[17:33] <Laurenceb_> freudian stip :P
[17:34] <Laurenceb_> or however you spell it
[17:35] <jcoxon> evening Laurenceb_
[17:35] <Laurenceb_> I want to try this technique now
[17:35] <Laurenceb_> hi jcoxon
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[17:37] <Laurenceb_> edmoore: have you ever studied electrodeposition
[17:37] <edmoore> nope
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[17:47] <jcoxon> natrium42, how did you get the data from the SNOX IV mission to update your google maps tracker?
[17:51] <natrium42> jcoxon, by running this script on my computer --> http://natrium42.pastebin.com/m4ae9c6fd
[17:52] <natrium42> whoops, something went wrong with the paste
[17:52] <natrium42> http://natrium42.pastebin.com/m4fb10413
[17:53] <jcoxon> was going to link the altitude up to my altitude dial :-)
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[18:24] <jcoxon> right done it :-)
[18:29] <jcoxon> does anyone remember what float height they aim for?
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[19:07] <natrium42> jcoxon, i don't remember, but i have channel logs if you need them
[19:11] <jcoxon> nah its okay
[19:11] <jcoxon> though assume they work in metres rather then feet?
[19:12] <jcoxon> as thats what the gps gives them
[19:14] <jcoxon> oh its feet
[19:14] <jcoxon> even better
[19:15] <jcoxon> and the max feet last time was 39872
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[19:28] <Hiena> Good evening!
[19:29] <jcoxon> evening Hiena
[19:32] <natrium42> Hi-ena
[19:38] <jcoxon> right, now to install my new GM862 module
[19:48] <jcoxon> hmmmm
[19:48] <jcoxon> i must be doing something new
[19:49] <jcoxon> something wrong*
[19:53] <natrium42> is it with GPS?
[19:54] <jcoxon> no
[19:54] <jcoxon> they replaced it for teh same module
[19:55] <jcoxon> so its the GM862-QUAD-Py
[19:55] <akawaka> you guys ever seen what looks like heat damage on your chutes?
[19:57] <jcoxon> nope
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[20:05] <natrium42> akawaka, you do?
[20:05] <akawaka> our parachute was damaged
[20:05] <akawaka> looks like melting from heat or friction
[20:09] <natrium42> interesting
[20:09] <natrium42> did you have a cutdown device that was heating up?
[20:09] <msweeney> how was the chute deployed?
[20:10] <msweeney> in rocketry, we use BP charges to shoot them out - melts them very often
[20:11] <jcoxon> aarrgghhh i don't understand
[20:11] <jcoxon> the gm862 is meant to be pin compatible
[20:12] <jcoxon> and they have identical datasheets
[20:13] <msweeney> is the ukhas site down for everyone, or just me?
[20:14] <jcoxon> nah its down
[20:16] <_johan__> natrium: No there where no cutdown device.
[20:17] <_johan__> The chute just hang under the balloon. the balloon came down with it in pices.
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[20:22] <natrium42> did it land softly?
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[20:24] <akawaka> no
[20:29] <_johan__> It was going down at about 1300 f/min
[20:31] <natrium42> 23km/h, that's soft IMO :)
[20:32] <natrium42> 24km/h actually
[20:34] <_johan__> Yeah, I wonder where the heat is from. Akawaka thinks friction. I think it looks to hot for that.
[20:36] <natrium42> nice puzzle, isn't it... though the landscape looks like a desert to me from the sat photos :P
[20:36] <natrium42> (sun burn)
[20:38] <akawaka> grazing land
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[20:54] <Laurenceb_> lmao reentry heating
[20:55] <Laurenceb_> actually on MiHAB2 there was a temperature sensor
[20:55] <Laurenceb_> there appeared to be heating on one degree or so during the descent
[20:55] <Laurenceb_> but that was without chute from 24km
[20:56] <Laurenceb_> bbl
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[21:11] <Laurenceb> arrg batchpcb are driving me mad
[21:12] <Laurenceb> they cant get my brd files to work
[21:12] <Laurenceb> but only for the radio board
[21:12] <Laurenceb> they arent explaining themselves properly
[21:12] <Laurenceb> but I suspect they dont have a 32mil drill
[21:14] <rcaron> i warned you batchpcb was a bad idea
[21:15] <Laurenceb> I'm trying and failing to work out where the 32mil drill holes are
[21:16] <Laurenceb> any ideas how to find them?
[21:16] <Laurenceb> also, in my gerber, X8764Y8080 is that in mil (ie 10^3 inch)
[21:19] <Laurenceb> as if it is those figures are insane :(
[21:21] <rcaron> tbh i don't know. the pcb layout is another guy's job, and all i know is batchpcb = headaches
[21:21] <Laurenceb> as I have now
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[21:30] <Laurenceb> wtf do you have to pay for msn ?
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[21:52] Action: Laurenceb1 beats bill gates to a bloody pulp
[21:52] <Laurenceb1> "the system has recovered from a serious error" <-- you dont say
[21:56] <Laurenceb1> jcoxon: is the telit module working ?
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[21:59] Nick change: Laurenceb1 -> Laurenceb
[22:11] <natrium42> Laurenceb, you can edit the drill file directly
[22:11] <natrium42> and modify the 32 mil drill to whatever you want
[22:12] <Laurenceb> yes
[22:12] <Laurenceb> thats what I've done
[22:13] <Laurenceb> I emailed it about 30 seconds ago, refreshed my inbox
[22:13] <Laurenceb> and guess what, an email from batchpcb, "sorry we made a mistake"
[22:13] <Laurenceb> it works ok
[22:13] <Laurenceb> what a bunch of clowns
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[22:20] <fnoble> hello
[22:20] <natrium42> hi fnoble
[22:21] <Laurenceb> I just asked batchpcb why they didnt reply sooner to inform me of the "problem"
[22:22] <Laurenceb> apparently there was nonone at work there for the past few days
[22:23] <natrium42> i told you to use goldphoenix directly :P
[22:23] <natrium42> you get what you pay for
[22:24] <Laurenceb> I'm poor :(
[22:25] <edmoore> You'd have to do about a year's worth of designs to make it worth using them directly
[22:25] <edmoore> annoyingly
[22:25] <edmoore> maybe we could do our own batch pcb
[22:25] <edmoore> hab pcb
[22:25] <Laurenceb> hehe
[22:25] <Laurenceb> right I'm going to get an early night
[22:25] <Laurenceb> cya all
[22:25] <edmoore> cya
[22:26] <natrium42> highaltitudepcb?
[22:26] Nick change: Laurenceb -> Laurenceb_away
[22:27] <natrium42> you broke it!
[22:27] <edmoore> what was the unit of distance they like in MIT?
[22:28] <natrium42> yes :)
[22:28] <natrium42> google knows it, you can try
[22:28] <edmoore> I remember the charles bridge was something like 500 smoots
[22:28] <edmoore> actually i completely forget how long it was
[22:31] <edmoore> zeusbot: say something
[22:32] <natrium42> !say something
[22:32] <edmoore> I hate the new Eastenders advert
[22:32] <edmoore> tiffernaaaaay!!!
[22:34] <natrium42> must be something british :P
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[00:00] --- Sat Apr 5 2008