2015-04-08.log

--- Log opened Wed Apr 08 00:00:46 2015
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kanzurehmm i think i do pretty okay with 5h 30m of sleep03:58
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kanzure"Cthulhu's anatomy is described as part man, part dragon, and part octopus."04:11
chris_99paperbot: http://www.sciencedirect.com/science/article/pii/S000326700700274704:38
paperbothttp://diyhpl.us/~bryan/papers2/paperbot/%0A%20Effect%20of%20temperature%20variation%20on%20the%20visible%20and%20near%20infrared%20spectra%20of%20wine%20and%20the%20consequences%20on%20the%20partial%20least%20square%20calibrations%20developed%20to%20measure%20chemical%20composition%0A%20.pdf04:38
chris_99hmm that's a html file04:39
chris_99actually04:39
archelskanzure: how consistent is your timing?04:44
archelsI think my downfall is usually waking up in the wrong part of a sleep cycle04:45
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JayDuggerInflux wasn't all that good, but it did have shiny places.06:05
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kanzurearchels: not consistent. sometimes i take 6, sometimes 8.06:15
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poppingtonicpaperbot: http://link.springer.com/article/10.1007%2FBF0138918607:46
paperbothttp://diyhpl.us/~bryan/papers2/paperbot/36da754a19966c0312b200eb157e77c5.txt07:46
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chris_99nmz787, are you about per chance, i just got a quote for http://njlzbx.en.alibaba.com/product/60190942033-800530746/High_diffraction_flat_filed_concave_blazed_grating.html11:49
chris_99they quoted 1-5pcs             $520/pc11:49
chris_99are they on crack?!11:49
nmz787_ihi11:55
chris_99hey, that seems stupidly expensive right?11:56
nmz787_inot really... for China, it seems a bit higher... but Richardson Gratings (the company serving the FAQs/technical notes I was sending) is at least $750-$100011:56
chris_99i thought yours was $10011:57
chris_99though11:57
nmz787_iI think they wanted around $15011:57
nmz787_idid you ever email him?11:57
chris_99nah, i'll do that11:57
nmz787_iI think the emails I sent had two email addresses in there11:57
chris_99is From: W michael <michaelaopuc@yahoo.com.cn> the one?11:58
nmz787_ichris_99: really though, I'd recommend getting things setup with a cheap $5 grating then upgrading when you find it isn't good enough11:58
nmz787_iyeah that was one11:58
nmz787_ithere was another I think too, more machine-generated looking11:58
chris_99ah yeah i think i see it, yeah i'll definitely start with a cheapo one11:59
chris_99it looks like i probably need around 500 lines/mmm11:59
chris_99to let through the 900nm11:59
nmz787_iI guess the other to try might be: leewenho@163.com11:59
kanzurewe should really pipe alibaba chat feeds into this channel12:00
kanzurei'm sure we can get lots of eager suppliers that want to send samples.. and stuff..12:00
nmz787_iwe definitely need a chinese regular in here12:01
nmz787_ithere are a lot of open source projects that I'd like to see them clone and make cheaper12:01
chris_99mmm12:02
chris_99that'd be awesome12:02
CaptHindsightnmz787: I've been trying12:03
chris_99ok the first email failed btw12:03
CaptHindsightnmz787: have an ordered list of what you'd like to see?12:04
CaptHindsightnmz787_i: ^^12:05
CaptHindsighthttp://www.alibaba.com/products/F0/diffraction_grating/CID1537.html12:09
chris_99yeah i used alibaba, and theres only 2 companies there that seem to sell concave diffraction gratins12:10
chris_99*gratings12:10
CaptHindsightdo you require concave and what wavelengths?12:11
chris_99900nm is the main peak i need to find12:12
nmz787_iCaptHindsight: not sure what you're asking12:13
CaptHindsightnmz787_i> there are a lot of open source projects that I'd like to see them clone and make cheaper12:13
nmz787_iah12:13
nmz787_iyeah12:13
nmz787_inot really a list12:13
CaptHindsightI have a factory 1 hour south of Nanjing12:14
kanzurespill the beans12:14
CaptHindsightbut still in Nanjing12:14
chris_99oh nmz787_i i don't spose you know the diameter of fiber your spectrometer uses btw? they seem to mention 200um in another section of the site though12:15
CaptHindsightchris_99: that supplier is in Nanjing12:16
chris_99yeah they're the one that quoted me $50012:17
CaptHindsightchris_99: what are you using for the sensor?12:18
chris_99http://www.aliexpress.com/item/Free-shipping-5pcs-TCD1304AP-TCD1304-CDIP22-Best-quality/1887814216.html12:20
CaptHindsightyou could use a DVD for the grating12:22
nmz787_ichris_99: not too sure, I know that often fiber-coupled spectrometers say that the fiber will act as a sort-of slit (but I think this depends on it being a single-mode fiber, not a multi-mode)12:25
nmz787_iso ideally you want a real slit anyway, I think12:25
nmz787_iCaptHindsight: openBCI was the most recent example12:25
chris_99aha12:25
nmz787_iCaptHindsight: I got a quote on USA-based assembly at about $15 per PCB not including parts (or the actual PCB i think) starting volume of 100 boards12:26
nmz787_iCaptHindsight: other interesting projects that need more work is eeg6412:26
CaptHindsighthttp://www.openbci.com/12:27
nmz787_iyep12:27
CaptHindsighthttp://www.eeg64.com/12:27
nmz787_iit's much further along than eeg6412:27
nmz787_ithough I haven't actually tested either12:27
CaptHindsightthose are easy12:29
CaptHindsightwas expecting a DNA sequencer12:29
CaptHindsightor micron resolution MRI12:30
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CaptHindsighthttps://openbci.myshopify.com/collections/frontpage/products/openbci-8-bit-board-kit  $500?12:43
chris_99that's really expensive12:43
chris_99considering the chip is like £20 i thought12:44
nmz787_iit's an AVR12:45
CaptHindsightthey have firmware and a GUI12:45
nmz787_iso it would be about $30 assembled with PCB and parts12:45
nmz787_iwatch out with GUI comments in here!12:45
chris_99i mean the ADC nmz78712:45
nmz787_iah, maybe so12:45
nmz787_iI didn't actually compute a BOM cost12:46
nmz787_iso maybe $50 then assembled and all12:46
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chris_99actually looks like the adc is $40-$5012:46
CaptHindsight24b 16khz adc12:47
CaptHindsight8 channel12:48
nmz787_ithey quote their noise specs at 70Hz tho12:48
nmz787_iwhich is reasonable I guess12:48
nmz787_ihigher pink noise in the lower freqs12:48
CaptHindsightwhats the highest frequency that needs to be captured by an EEG?12:59
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CaptHindsight8khz sampling devices are <$1013:00
CaptHindsight16khz are 2x13:01
CaptHindsightfor 8 channels and 24b13:01
nmz787_ipersonally I've never seen anything with high sampling rates, even though I would think that type of experiment would be required for negative hypothesis testing (i.e. that all brain signals are low-freq)13:07
nmz787_iso I think sub 1000Hz or maybe even sub-100Hz is pretty common13:08
CaptHindsighthttp://support.neurosky.com/kb/science/eeg-band-frequencies13:08
CaptHindsight50hz max on their charts13:08
nmz787_ibut you reduce noise with higher freqs and stuff like choppers... but I don't know if they're chopping their signal to do that or not13:08
nmz787_ithey could have just said "this part says it's the lowest noise available, let's get it"13:08
CaptHindsightI just saw the 18khz sample rate and wondered why13:09
CaptHindsightyeah, might be13:09
nmz787_iCaptHindsight: know anyone at Rigol that would want to arrange a bunch of GHz o-scopes as an EEG headset, then donate all those scopes to hacker/makersspaces after the experimental results were obtained?13:09
nmz787_i(my basic philosophy for a few years has been if a cell-phone/radio chip is so tiny, what reason couldn't neurons accomplish the same)13:10
nmz787_ibut no one really seems to have done an exhaustive search over the freq-space13:10
CaptHindsightI'll look it all over soon13:11
nmz787_iit seems very reasonable that with enough sampling and sensors, you could get some sort of tomography accomplished13:12
CaptHindsightmultichannel low frequency logger/analyzer13:12
nmz787_ieven if all the neurons individually are slow, there might be constructive/destructive interference occuring and pushing things into harmonics... so I think a lot hasn't been looked at13:12
CaptHindsightyou really just want the data, the GUI can be a laptop, tablet, phone whatever13:13
nmz787_iyeah13:13
nmz787_iexactly13:13
nmz787_iAPIs are pretty key I'm learning13:13
CaptHindsighthttp://www.cnx-software.com/2015/04/06/jye-tech-dso138-is-a-23-diy-oscilloscope-kit/13:14
CaptHindsightnot 24b but the rest is there13:14
nmz787_ieven Rigol scopes are 8-bit13:15
nmz787_ia search experiment would not need 24bit though13:15
CaptHindsightlots of 32b arm cortex code for signal processing13:16
CaptHindsightand stm32c are a few $13:16
nmz787_ieven some cheap FPGAs now too13:16
nmz787_ithe ICE40 for example13:17
CaptHindsight16 channel of 12b ADC  ~$1  http://www.st.com/web/catalog/mmc/FM141/SC1169/SS1574/LN1826/PF258964#13:20
chris_99isn't that just a single adc really13:20
nmz787_i24b is a lot more sensitive though still13:20
nmz787_iwell even the 8 channel originally linked to likely is13:20
nmz787_ijust the muxers are all real nice13:21
chris_99ah you mean even the Ti one will use muxing?13:21
nmz787_iyeah most likely13:21
chris_99aha13:21
nmz787_ithey'd call them analog switches or somethig13:21
CaptHindsightlooks like the TI device has 8 ADC's13:22
chris_99oh13:22
CaptHindsighthttp://www.ti.com/lit/ds/symlink/ads1299.pdf13:22
CaptHindsightmight be overkill13:22
CaptHindsight<100Hz at 12b should be fine13:22
nmz787_ifor tomography you'd need all the resolution you can get13:25
nmz787_iall the prior eeg headsets fail because they lack resolution in the data and number of detection sites13:25
CaptHindsightI don't see the schematics13:26
CaptHindsightand I didn't notice any analog filtering on the pcb13:26
nmz787_ihttps://github.com/OpenBCI/Docs/blob/master/hardware/01-OpenBCI_Hardware.md13:26
nmz787_ihttp://ultracortex.com/downloads/hardware/OpenBCI_8bit.zip13:26
nmz787_ifrom the five seconds I looked at the TI part, it seemed all inclusive13:26
nmz787_i92% reduction in components it said13:27
CaptHindsightdo you put the subjects into a Faraday cage?13:27
CaptHindsightthe analog front end in the ADS1299 is nice13:29
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nmz787_iCaptHindsight: guess it depends on the application of use... for experiments that sounds like a good idea... for end-users sitting on the couch wanting to type, probably not13:43
archelsnmz787_i: for my understanding, do you want to do better EEG tomography or do you intend to pick up electromagnetic fields emitted by neurons?13:47
nmz787_iisn't that the same thing?13:56
archelswell, with EEG you assume that the magnetic component is negligible, and you just measure the static E-field13:58
archelsstatic in the sense of Maxwell's equations13:58
archelsin the latter case you'd use antennas13:58
chris_99sorry for being dumb, but isn't the eeg electrode like an antenna14:00
nmz787_iarchels: isn't the difference just the freqs measured then?14:00
archelschris_99: no, it doesn't couple electromagnetic energy, it's just a conductor14:01
nmz787_iarchels: if so, that's what I was saying earlier, that I haven't seen any experiments where they did the same test at DC or low-freq, all the way up to RF14:01
nmz787_iwouldn't you just add a capacitor in the wire to get the non-DC components though?14:02
nmz787_iyou wouldn't need to be physically disconnected14:02
nmz787_iI don't think14:02
archelsit's not DC in terms of a non-varying signal, it's static in that the magnetic and electric fields are uncoupled14:02
nmz787_iah, well it'd be interesting to see results of both with direct-connection and with an insulator between14:04
nmz787_iif the magnetic-influenced stuff turned up something interesting, then that would seem to indicate some capability of wireless14:05
nmz787_i(though I have some ideas on evolutionary topics of why wireless might not have happened on its own, due to security risk of broadcast vs point-to-point or peer-to-peer)14:06
nmz787_ibut there definitely seems to be the capability power-wise with physiologies found in electric fish14:06
archelsare there any known examples in the animal kingdom of communication via EM?14:08
chris_99bees14:08
chris_99or not exactly heh, they pick up EM from flowers14:08
chris_99to know if other bees14:09
chris_99have been on the flower14:09
archelshumans pick up EM from flowers -_-14:09
chris_99heh i guess14:09
chris_99*em field14:10
chris_99ah it's called Magnetoception14:11
archels"thermal noise has energies (0.025 eV) which are higher than radio wave photon energies (<0.001 eV) (it rules out both controlled creation and detection using molecules).14:11
archelsBecause the intermediate stages are not evolutionarily favoured. That's why.14:13
archelsSound and light perception are useful without any generative capability. An organism with a tiny amount of perception for either of these things has an advantage over those without; and an organism with a tiny amount more has an advantage over those with a tiny bit less. This advantage forms the basis for selection and thus improved sensory capabilities (balanced, of course, by the cost of those capabilities).14:13
archelsBeing able to perceive radio on the other hand provides no useful information about the world at low level perception so even if an organism was to randomly mutate so as to detect radiowaves* there would be no selection for this ability, and thus no mechanism to drive the evolution of advanced radio reception. Without the ability to perceive radiowaves there is no possibility of evolving the ability to generate radio signals in a controlled ...14:13
archels... manner.14:13
archelsI guess cell-to-cell communication with photons is pretty well established14:15
archelsnot sure what wavelengths that is at, probably close to visual14:16
archelscould be interesting for neurons too, but then you run into mean free path problems getting those photons out of the skull14:16
kanzureis nmz787_i still upset about his radioneurons not picking up rush limbaugh14:22
nmz787_iI haven't found any14:22
nmz787_i(results in the animal kingdom)14:22
nmz787_ithere is a ton of what seems to be soviet-era misinformation though14:23
nmz787_iwhich slowed down my research quite a bit14:23
chris_99about what?14:23
nmz787_iEM comms in animals/humans14:23
nmz787_isome photobased stuff14:23
nmz787_isome just crap14:23
chris_99does the microwave auditary effect count14:23
chris_99as communication14:23
nmz787_iwell, any way it gets the job done14:24
kanzuremany organisms communicate using the electromagnetic spectrum. why do you think people keep complaining about peacock tails?14:24
chris_99and chameleons i guess14:25
nmz787_imy feeling really just stems from the point that you could fit a wifi+computer in a lobotomized person's skull space... and the physiology for coding and electrical pulsing exists... so if it hasn't existed it's either too new to the scene for all the pieces to come together into a working system... or it failed early on because simple messages about food and resources would likely have been picked up by different species or something, making the sy14:25
nmz787_is/so if it hasn't existed/so if coded EM comms hasn't existed/14:27
archelschris_99: that's just heating, no?14:31
archelsnmz787_i: you got cut off at "making the sy"14:31
chris_99hmm i'm not sure14:33
chris_99'When microwaves are delivered in short pulses, the cochlear tissue in the ear expands.' so yeah i guess it could be14:34
nmz787_i'making the system fail'14:39
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CaptHindsightthe open BCI eeg can easily be produced for well under $10015:30
kanzuretoo bad eeg sucks15:30
CaptHindsightwe need some nanobots to cruise around the brain while mapping and recording15:31
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kanzureCaptHindsight: russell hanson wants to use gold nanoparticles to do neuroimaging at a synaptic resolution, but see criticism here (around 18:44 and forward) http://gnusha.org/logs/2014-11-28.log15:41
kanzurewhy aren't there any long distance runners that are injecting insulin through their back or something throughout the duration of the race?15:59
kanzurejrayhawk please advise.15:59
jrayhawkinsulin sensitivity is not typically a problem they have16:05
jrayhawkor, rather, insulin insensitivity is not typically a problem they have16:06
kanzureno i mean, instead of eating food or relying on stored energy, they can just pump shit into their body16:07
kanzure(on-demand)16:07
jrayhawkthe limitations are in cellular and mitochondrial respiration16:08
jrayhawkhttp://en.wikipedia.org/wiki/Anaerobic_glycolysis16:08
jrayhawkthey already are pumping shit into their body pretty thoroughly by carb-loading leading up to competition16:10
jrayhawksome of them have been playing around with large quantities of artificial slow-digesting starches16:11
jrayhawkhttp://www.google.com/search?q=running+superstarch&hl=en&gbv=116:11
jrayhawkhttp://scholar.google.com/scholar?q=running+intestinal+permeability though i do have to wonder how intestinal permeability plays with that16:13
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cluckjisn't insulin considered illegal in competitive running?16:32
cluckjalso too much insulin and even someone with a normal endocrine system will eat pavement16:37
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jrayhawkin general, the attitude of "our peripheral tissues are undergoing so much oxidative stress that they're resisting energy uptake signals? welp, better just signal energy uptake EVEN HARDER!" is an artifact of a medical system obsessed with treating biomarkers and drugs that you should not seek to emulate16:54
jrayhawker, treating biomarkers with drugs16:55
cluckjhaha16:55
cluckjyes16:55
cluckjgiving yourself extra insulin is just gonna give you insulin resistance16:55
kanzurei think carl feynman is a vernor vinge fan http://mindstalk.net/vinge/fire.html17:17
kanzurealthough this should not be surprising given his prior involvement with the boston extropians17:17
nmz787_iCaptHindsight: this might be a good one https://fail0verflow.com/blog/2014/ov3-hardware.html17:20
nmz787_ihttps://github.com/openvizsla/ov_ftdi17:20
CaptHindsightUSB Sniffer17:23
CaptHindsighthttps://www.olimex.com/Products/Duino/Shields/SHIELD-EKG-EMG-PA/open-source-hardware17:31
CaptHindsighthttps://www.olimex.com/Products/Duino/Shields/SHIELD-EKG-EMG/open-source-hardware17:32
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CaptHindsighthttp://mobilecg.hu/ failed kickstarter ECG17:34
CaptHindsighthow do the regulatory approvals (CE, FDA)  cost?17:35
nmz787_iFDA needs documentation from the ground up17:35
CaptHindsightFDA is the big one17:35
nmz787_ican't retrofit, technically all the writing needs done fresh when you say 'this is the start of the FDA process'17:36
nmz787_iwhich includes PCB layout and code17:36
nmz787_ithat's about all I know17:37
nmz787_i(worked on one project that was potentially going FDA)17:37
CaptHindsightlooks like he budgeted ~$100K17:37
nmz787_i(that was all considered 'research', just saying that it was 'development' was the crossing-point for when to need to do the FDA-way of things)17:37
nmz787_itop comment on that last page is pretty interesting17:38
nmz787_i"Hi Mobilecg Team, Great work guys !!! guys need some input from you on Defib protection for IO lines...did this mobilecg pass 5KV defib test ? can you please share your inputs on how to design defib protection for IO lines."17:39
nmz787_i" In my current project (ECG device/similar to mobilecg) i am observing that AFE1198 is getting hanged when a defib 5KV pulse is applied and restores back when reset. What could be the reason for AFE to hung,Please help me on this."17:39
kanzureapparently you can self-certify for electronics, at least. as long as it is not medical.17:42
CaptHindsighthttp://www.gammacardiosoft.it/openecg/17:52
heathwasn't http://stellar.org brought up previously?17:52
nmz787_iCaptHindsight: I would love to see a project like this, except with the LPC4370 chip as the center of attention http://www.banggood.com/DIY-Digital-Oscilloscope-Kit-Electronic-Learning-Kit-p-969762.html17:59
nmz787_iCaptHindsight: anything with the LPC4370 in it would be a good choice17:59
nmz787_ithe only 'dev board' is this ~$20 thing which isn't very hacker friendly http://www.embeddedartists.com/products/lpcxpresso/lpclink2.php18:00
nmz787_ithe software is a bit much to deal with... but it shouldn't be too hard to arduino-ize it (since they've already done that for several other ARM chips already)18:01
kanzureheath: it's just ripple. don't waste your time.18:01
nmz787_ialthough a daughter board for the LPClinkv2 might be a cheaper route to getting it into peoples hands and getting the community support for software18:01
nmz787_ihttp://www.gammacardiosoft.it/openecg/getting_started.htm#specifications18:03
nmz787_inot too terrible18:03
nmz787_iwhat's the price?18:03
nmz787_ii could probably convert the orcad files to open-source ones18:04
nmz787_ioh they also have gerbers18:04
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CaptHindsightwho was asking about the piezo micro pumps?  http://www.microjet.com.tw/en/products/list.php?pin=49600c3d3d05596e2da84e1774f0c398&type=s18:35
nmz787_imicropumps are all the rage in here18:36
nmz787_iprice?18:36
CaptHindsighthttp://www.curiejet.com/en/products/list.php?pin=099861a6e97183485912f85df4e401fd&type=s18:38
CaptHindsighthttp://microjet.en.alibaba.com/product/704293821-215732156/CurieJet_Printer_ink_diaphragm_Micropump.html18:40
CaptHindsightnmz787_i: <$5018:42
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kanzurehmph20:40
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kanzure.title https://news.ycombinator.com/item?id=934534021:04
yoleauxAmphetamines Are Hiding in Your Supplements | Hacker News21:04
kanzureokay with me21:04
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andytoshioh, that reminds me to take my iron pill21:19
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