highaltitude.log.20111220

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[00:19] <hibby> aye
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[03:14] <snelly> has anybody here worked with the SRB MX146?
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[10:18] <SpeedEvil> http://www.amazon.co.uk/gp/product/B004HO57OE/ref=s9_al_bw_g23_ir01?pf_rd_m=A3P5ROKL5A1OLE&pf_rd_s=center-1&pf_rd_r=0VNPMGQY3V2H19092F9S&pf_rd_t=101&pf_rd_p=269847467&pf_rd_i=590987031
[10:18] <number10> interesting
[10:20] <fsphil> "X-Men pirate sentenced over leak" --- this story is not nearly as good as it sounded :)
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[10:46] <SpeedEvil> Anyone happen to have access to http://pubs.acs.org/doi/full/10.1021/nl2023433 . ?
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[10:53] <SamSilver_> SpeedEvil: nope
[10:54] <SamSilver_> SpeedEvil: and I am in
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[11:06] <SpeedEvil> Silly me - google fail.
[11:06] <SpeedEvil> http://www.stanford.edu/group/cui_group/papers/123%20Alshareef%20Supercap%20Sponge.pdf
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[12:30] <SamSilver> Air temperature 31 C, surf temperature 24 C, pool at home temperature 29 C. It doesn't hurt at all....
[12:33] Action: SpeedEvil sighs.
[12:33] <SpeedEvil> It's warmed up in my lounge to 5C.
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[12:34] <SpeedEvil> However, I'm ordering the last of the bits I need to fix up my bathroom to a usable state.
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[12:38] <SamSilver> SpeedEvil: should I buy shares in KlingSpan? or are you done with them?
[12:39] <SpeedEvil> Not yet.
[12:39] <SpeedEvil> I need to at some point in the near future order many cubic meters.
[12:39] <SpeedEvil> I haven't eyet worked out exactly how many
[12:40] <SamSilver> right tell when you done so I can sell
[12:40] <SamSilver> I live under thatch and it is great except when lightning strikes
[12:41] <SamSilver> got two 50 foot conductors planted in the garden after first strike
[12:43] <SamSilver> I think they are 70 foot tall as house is double story
[12:44] <fsphil> the first strike? how many times has it been hit?
[12:44] Action: SpeedEvil pulls trigger on 400 quids of transparent and translucent plastic to finish ff bathroom and greenhouse.
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[12:45] <SamSilver> just the once, the conductors work well
[12:45] <SpeedEvil> And play with some solar collectors.
[12:45] <SamSilver> the strike set fire to the roof
[12:45] <SpeedEvil> SamSilver: You should hook them to a bank of low ESR caps.
[12:45] <SpeedEvil> :)
[12:46] <SamSilver> SpeedEvil: about 4 tons worth?
[12:46] <SpeedEvil> No.
[12:46] <SamSilver> power for 120 years
[12:46] <SpeedEvil> ah - yes - 4 tons of caps
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[12:49] <SamSilver> have you read about the under-sea neutrino observatory?
[12:50] <SamSilver> http://www.gizmag.com/km3net-mediterranean-neutrino-observatory/20872/?utm_source=Gizmag+Subscribers&utm_campaign=a1fce39fc9-UA-2235360-4&utm_medium=email
[12:53] <SpeedEvil> The under-ice one is cooler.
[12:53] <SpeedEvil> http://en.wikipedia.org/wiki/IceCube_Neutrino_Observatory
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[13:40] <WillDuckworth> anyone got a ublox MAX-6 GPS going at all? those things are tiny
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[13:45] <Laurenceb> anyone here got serial working with java on ubuntu?
[13:47] <Randomskk> well arduino works
[13:47] <Randomskk> which is serial and java
[13:48] <Laurenceb> package gnu.io does not exist
[13:48] <Laurenceb> <Laurenceb> import gnu.io.SerialPort;
[13:49] <Laurenceb> i have librxtx
[13:49] <Laurenceb> do i have to install it or something?
[13:49] <Laurenceb> i know ~0 about java
[13:49] <Laurenceb> just grabbed librxtx from the repo
[13:51] <Laurenceb> where is the jre root?
[13:51] <Randomskk> absolutely no idea
[13:51] <Randomskk> why are you doing this to yourself?
[13:52] <Laurenceb> lol
[13:52] <Laurenceb> im trying to make someone elses code run
[13:53] <costyn> echo $JAVA_HOME ?
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[13:53] <costyn> or was it $JAVA_PATH ... my god it's been too long :)
[13:55] <Laurenceb> hmm neither exist
[13:55] <Laurenceb> maybe i dont have java installed
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[13:58] <WillDuckworth> set PATH=$PATH:/home/where/is/extracted/jre.1.whatever/bin
[13:59] <WillDuckworth> export instead of set
[14:00] <WillDuckworth> you can check once done with 'which java'
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[14:02] <Laurenceb> fuck this ill rewrite in python
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[14:29] <costyn> Laurenceb: probably faster
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[15:59] Action: SpeedEvil wonders about remote interferometers.
[15:59] <SpeedEvil> http://www.ebay.co.uk/itm/FE-5680A-Rubidium-Atomic-Frequency-Standard-Oscillator-Transceivers-10Mhz-Out-/270873476863?_trksid=p3286.m7&_trkparms=algo%3DLVI%26itu%3DUCI%26otn%3D2%26po%3DLVI%26ps%3D63%26clkid%3D5026858500972750919
[15:59] <SpeedEvil> Plus a frac-n to give a nice reference, and something to sample around that frequency.
[16:00] <SpeedEvil> Three stations gives you range and motion to a RF source in view.
[16:01] <SpeedEvil> Also -
[16:03] <SpeedEvil> http://www.st.com/internet/analog/product/253022.jsp
[16:03] <SpeedEvil> 6 axis for $2.75@1k
[16:06] <Laurenceb> me has tmp006-evk working
[16:06] <Laurenceb> on linux :P
[16:07] <SpeedEvil> What's that - I don't recall the PN
[16:08] <SpeedEvil> Also - wow - .029R FETs at 650V
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[16:14] <Laurenceb> smd digital thermopile
[16:16] <SpeedEvil> Oh - rithg the on from TI?
[16:16] <SpeedEvil> I have one of those too
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[16:19] <Laurenceb> ceiling is 2 degrees hotter in here
[16:20] <SpeedEvil> I wish nice lenses were cheaper
[16:20] <SpeedEvil> A good - ~2 degree say - lens would be really interesting for that
[16:21] <SpeedEvil> I just got a IR thermo from DX-UK - that I'm hoping to canibalise the lens for.
[16:21] <SpeedEvil> Also - remember the emissivity.
[16:21] <SpeedEvil> (though if painted, it's gonna be close to 1)
[16:24] <Laurenceb> 34millikelvin per sqrt(Hz)
[16:24] <Laurenceb> looks like the noise with it in its plastic case
[16:27] <Laurenceb> pity the ambient sensor is only 14bit
[16:27] <Laurenceb> it suffers from quantisation a lot
[16:29] <Laurenceb> im making a thermal diffusivity probe with a polymer optic fibre and the tmp006
[16:29] <Laurenceb> blast ~300mw of near IR down the fibre to heat the target
[16:29] <SpeedEvil> umm.
[16:29] <cuddykid> just done some more sanding of wings for glider - starting to resemble wings rather than a rectangular piece of styrofoam!
[16:29] <SpeedEvil> POF will have zero transmissivity surely?
[16:30] <Laurenceb> at 700nm it works
[16:30] <Laurenceb> 700nm 4.5W led -> fibre -> target
[16:30] <Laurenceb> tmp006 observes target
[16:30] <SpeedEvil> Oh - the thermal doesn't go through the fibre
[16:30] <Laurenceb> yeah
[16:30] <Laurenceb> getting the geometery to work is a pita
[16:30] <SpeedEvil> cuddykid: I've pondered getting a nice wing to play with
[16:30] <Laurenceb> im going to try a HDPE PIR lens
[16:30] <SpeedEvil> cuddykid: To try my flapping thing
[16:31] <cuddykid> SpeedEvil: currently I'm just trying to make it like a wing.. and hoping for the best!! It's going to require a lot of luck to get this thing flying correctly
[16:32] <Laurenceb> alternatively make a really small thermocouple to mount on the sample
[16:32] <Laurenceb> but non contact is cool
[16:32] <SpeedEvil> Indeed.
[16:33] <Laurenceb> http://www.edmundoptics.com/products/displayproduct.cfm?productid=2042
[16:34] <SpeedEvil> Any further thoughts on your solar-thermal thingy?
[16:34] <SpeedEvil> Was the thing you were trying to work out on ##physics really that?
[16:34] <SpeedEvil> The sim?
[16:34] <Laurenceb> nope it was this thing
[16:34] <SpeedEvil> ah
[16:35] <Laurenceb> i got it working in the end
[16:35] <Laurenceb> but its annoyingly slow
[16:35] <SpeedEvil> I've wondered about something analgous.
[16:35] <SpeedEvil> Though for laser hair removal.
[16:35] <Laurenceb> for some reason laser heating excites crazy oscillations in my sim code
[16:35] <SpeedEvil> Currently, laser hair removal is painful, largely due to the heating of teh skin.
[16:36] <SpeedEvil> If you can instead focus it only on the hair root, and not just heat overall...
[16:36] <Laurenceb> interesting
[16:38] <SpeedEvil> Is this for medical?
[16:38] <Laurenceb> yes
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[16:43] <Raul_> Hi Nigeys
[16:43] <NigeyS> hi Raul, how's you ?
[16:43] <Raul_> excellent! will launch my balloon from central Germany this year
[16:43] <Raul_> ~28th December
[16:44] <NigeyS> great news :-)
[16:45] <Laurenceb> http://i.imgur.com/vRsuO.png
[16:46] <SpeedEvil> Good luck!
[16:48] <Raul_> Thank you, can't wait!:)
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[16:51] <Laurenceb> http://pastebin.com/nzzM1gdU python script there - ive hacked it up to a bus pirate
[16:52] <SpeedEvil> Interesting.
[16:53] <Laurenceb> according to the ref manual SO has to be found be calibrating
[16:53] <Laurenceb> i grabbed from the labview eval code
[16:54] <Laurenceb> but i dont know if its for my sensor, its seems to work okish
[16:55] <SpeedEvil> SO?
[16:56] <Laurenceb> the coefficient hiding in the code
[16:57] <SpeedEvil> ah
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[17:00] <Laurenceb> heh we could use one for hab envelope temperature :P
[17:01] <SpeedEvil> Unsure.
[17:01] <SpeedEvil> I thought of that, but I'm unsure if the balloon isn't thin enough thtat it's going to be significantly transparent
[17:02] <Laurenceb> yeah
[17:02] <Laurenceb> it varies a lot between plastics
[17:02] <Laurenceb> HDPE and PTFE are quite transparent below 1mm thickness
[17:02] <SpeedEvil> And ~10um radiation, with a ~5um thick balloon
[17:02] <Laurenceb> but others not so much
[17:02] <Laurenceb> hmm
[17:03] <Laurenceb> i wonder if thats means the envelope cant radiate
[17:03] <Laurenceb> so it gets crazy hot?
[17:03] <Laurenceb> ... and needs to be cooled
[17:03] <SpeedEvil> Sounds unlikely
[17:03] <Laurenceb> do you see where im going here?
[17:03] <SpeedEvil> I suppose there may be some anomolus absorbtion spike in the spectrum
[17:03] <Laurenceb> hydrogen cools the envelope better and makes it last longer XD
[17:04] <SpeedEvil> :)
[17:04] <Laurenceb> might be one nutty explanation for the transatlantic floater
[17:04] <SpeedEvil> Or percolating hydrogen protects against oxidisation catalysed by UB
[17:05] <SpeedEvil> That actually makes sense
[17:05] <Laurenceb> yeah maybe
[17:05] <Laurenceb> why would that work better than helium?
[17:05] <SpeedEvil> It's reducing
[17:06] <Laurenceb> hmm
[17:06] <Laurenceb> im not sure it works like that
[17:06] <SpeedEvil> Filling the pores with a reducing gas may help stop the membrane oxidising
[17:06] <SpeedEvil> Me neither.
[17:06] <Laurenceb> helium is inert
[17:06] <Laurenceb> that only works if theres enough energy for the hydrogen to react
[17:06] <SpeedEvil> Sure - but you will get diffusion of oxgen in to a degree
[17:06] <Laurenceb> to break the H-H bonds
[17:06] <SpeedEvil> and I'm thinking about hard UV
[17:07] <Laurenceb> yeah
[17:07] <Laurenceb> its maybe feasible
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[17:07] <SpeedEvil> Haven't some of the He filled ones floated quite a long way too?
[17:07] <SpeedEvil> Or did they all burst at sunrise
[17:07] <Laurenceb> they've never flown for a full day aiui
[17:07] <SpeedEvil> hmm
[17:07] <Laurenceb> the hydrogen one floated for ~2.5 full days
[17:08] <Laurenceb> worth of sun
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[17:08] <Laurenceb> its an interesting question - if the envelope selectively absorbs at optical, wont it get crazy hot
[17:09] <Laurenceb> so maybe that could cause failure
[17:09] <SpeedEvil> Not optical - IR
[17:09] <Laurenceb> absorbs at optical, is more transparent at ir
[17:09] <SpeedEvil> hmm
[17:09] <SpeedEvil> oh - right
[17:09] Action: SpeedEvil is not properly awake.
[17:09] <SpeedEvil> I'm unsure.
[17:10] <SpeedEvil> I think you get a sharp spike in the emission spectrum too - but I'm not convinced
[17:10] <SpeedEvil> Depends if enough is aborbed that you get effective interference from bounces between the surfaces
[17:16] <Laurenceb> yeah
[17:16] <Laurenceb> wow
[17:16] <Laurenceb> i just dissolved nichrome wire in high Ag solder
[17:16] <Laurenceb> groovy
[17:20] <SpeedEvil> :)
[17:20] <SpeedEvil> Intermetallics are fun!
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[17:32] <Laurenceb> tin/lead solder wouldnt even stick
[17:32] <daveake> nope
[17:33] <daveake> I just about got it to stick using some bit cleaner
[17:33] <daveake> I gave up and crimped
[17:34] <BrainDamage> I soldered one making a large blob of Sn/Pb and embedding the wire in it, worked ok
[17:38] <Laurenceb> bbl
[17:39] <Laurenceb> works with normal lead free if you sand then use lots of flux
[17:39] <Laurenceb> then stick it in a blob of solder
[17:39] <Laurenceb> you still cant tin it
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[19:54] <Lunar_Lander> hello
[19:55] <nosebleedKT> luna!
[19:57] <Lunar_Lander> :)
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[19:59] <Laurenceb_> sup
[19:59] <nosebleedKT> luna you know that there is a project to send payloads on the moon ?
[19:59] <Lunar_Lander> that new X-Prize?
[19:59] <nosebleedKT> hmm, i posted on my fb.
[20:00] <Lunar_Lander> OK, will check it out
[20:00] <nosebleedKT> could be that.
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[20:06] <nosebleedKT> with the money europe gives to gr we can actually send more than 100.000 payloads on the moon
[20:06] <nosebleedKT> can make it habitable
[20:06] <nosebleedKT> :P
[20:06] <nosebleedKT> 5.000$ each
[20:09] <Lunar_Lander> yeah :)
[20:09] <joph> lol
[20:16] <Raul_> the google lunar x prize?
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[21:37] <mnsp> Hello All :o)
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[21:40] <MNSP> Hello All :o)
[21:40] <MNSP> Been a heck of a while since I was last on, hope all are well
[21:42] <MNSP> Have had all sorts of 'issues', home life, family job and research going on hence completly vanishing...
[21:43] <NigelMoby> Ello Mnsp
[21:43] <NigelMoby> busy times then eh.
[21:44] <MNSP> Anyhow, I just wanted to wishh everyone a Merry Christmas and just say thanks to you all. Especially, JC and the Cambridge guys, Steve R, Mr Craig and FSphil and everyone really from when I was knocking about
[21:44] <MNSP> Hey Nige! How goes it?
[21:44] <MNSP> Yes mate and then some
[21:46] <NigelMoby> not to bad, recovering from yet another day if Xmas shopping!
[21:46] <NigelMoby> of*
[21:47] <MNSP> LOL, I've had to do pretty much all of mine online, no time for going round shops...
[21:48] <Lunar_Lander> hi MNSP NigelMoby
[21:48] <NigelMoby> I did try lol
[21:48] <MNSP> Hello Lunar
[21:48] <NigelMoby> hi kev
[21:48] <Upu> anyone who is good with PCB want to just have a scan over this and see if there are any sillys : http://ava.upuaut.net/files/SwiftV1.pdf
[21:48] <MNSP> yeah, I guess I was lucky. But I do like shopping (no MNSP is not a girl)
[21:48] <Lunar_Lander> hi Upu
[21:49] <Upu> hey Lunar_Lander
[21:49] <Lunar_Lander> Upu do you still have the Man Lab online?
[21:49] <Upu> yep
[21:49] <Lunar_Lander> can I have it please?
[21:50] <NigelMoby> lol Mnsp I don't mind it sometimes, but town, Xmas time... not good.
[21:51] <Lunar_Lander> btw I found a picture that is called "Colours of the Storm"
[21:51] <Lunar_Lander> here it is
[21:51] <Lunar_Lander> http://s.gullipics.com/image/y/w/g/5zttns-jzz80z-xz3b/img.jpeg
[21:51] <MNSP> am feeling you on that. I popped into my local hmv as I work in town centre yesterday and the ques was about 30 long.
[21:52] <NigelMoby> Bah, that sucks!
[21:53] <MNSP> I know, all I anted was a coupla itunes vouchers... so I left and went back today at about 3pm only about 10 long
[21:53] <Lunar_Lander> today I was in a big supermarket with a "quick checkout" where you can have up to seven pieces
[21:53] <MNSP> oh yeah?
[21:53] <Lunar_Lander> wasn't quick because people payed with card and also the women there had to phone someone for the price of a mascara or some stuff
[21:54] <MNSP> typical!!!
[21:55] <MNSP> this time of year you shouldn't go into a shop and expect quick I guess
[21:55] <Lunar_Lander> yeah
[21:55] <Lunar_Lander> also a woman had a box of pears
[21:55] <Lunar_Lander> if you take these as pieces, she had far more than 7
[21:55] <MNSP> I heard some place are staying open on Christmas day
[21:55] <MNSP> LOL
[21:56] <MNSP> I think that is a little unfair Lunar ;-)
[21:56] <MNSP> I wonder what a box of rice krispies would work out as?
[21:58] <Lunar_Lander> xD!
[21:58] <MNSP> with the Count fromm sesame street on the till
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[21:58] <MNSP> 1 hahaha, 2 ahahah etc
[21:59] <Lunar_Lander> XD!
[21:59] <MNSP> right thats e out of time...
[22:00] <Lunar_Lander> btw
[22:00] <Lunar_Lander> did you check out that picture I posted?
[22:00] <MNSP> wish you all a cracking and serene Christmas, all the best for the new year.
[22:00] <Lunar_Lander> thanks, the same to you
[22:00] <MNSP> I will be back Feb/march time
[22:00] <MNSP> am damn well gonna get my balloon up!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
[22:01] <MNSP> g'nite chaps :o)
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[22:03] <Lunar_Lander> :)
[22:03] <Lunar_Lander> NigelMoby: did you check the link? and Upu
[22:03] <Upu> the picture ?
[22:04] <Lunar_Lander> yes
[22:04] <Upu> yeah its ok never was a big fan of the digital blasphmy style pics
[22:05] <Lunar_Lander> yeah
[22:08] <joph> there was a page with all satellites that are currently in space, has anyone of you a link to this site?
[22:09] <joph> like tracking rosat
[22:09] <joph> a little bit like this, or is this it? http://www.n2yo.com/
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[00:00] --- Wed Dec 21 2011