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| cluckj | nmz787, it was had | 04:51 |
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| fenn | .title http://www.postnatural.org/ | 05:43 |
| yoleaux | Center for PostNatural History | 05:43 |
| fenn | "'PostNatural' refers to living organisms that have been altered through processes such as selective breeding or genetic engineering. The mission of the Center for PostNatural History is to acquire, interpret, and provide access to a collection of living, preserved, and documented organisms of postnatural origin. | 05:44 |
| fenn | "provide access" is an interesting twist for a museum | 05:44 |
| fenn | does this mean they have atcc microbe strains and cell lines? | 05:44 |
| fenn | or is it just like, "hey, look at this dead goat" | 05:45 |
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| fenn | no need to photograph the books, they're here http://www.gigapan.com/gigapans/1abbddb613f9276c81d2067170916320 | 05:54 |
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| fenn | should i get a crock pot that's missing a crock? i'm not sure what to do with it but it seems potentially useful | 06:04 |
| cluckj | sous vide cooker? incubator? | 06:04 |
| fenn | it's square stainless-clad and programmable | 06:04 |
| fenn | i was thinking about making machinable wax | 06:05 |
| fenn | or some other plastic dissolving experiment | 06:05 |
| fenn | hadn't thought of sous vide | 06:05 |
| fenn | ok my mind is made up, huzzah, more junk! | 06:06 |
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| fenn | junk acquired. | 06:26 |
| fenn | ok maybe "programmable" was an overstatement... but it does have an LCD that i could hack to do something useful, like display the temperature setting | 06:38 |
| fenn | it reminds me of the water baths in the biology lab | 06:39 |
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| cluckj | sweet | 06:42 |
| kanzure | .title http://www.autogeny.org/aircar/index.html | 06:47 |
| yoleaux | Aircar Proposal | 06:47 |
| kanzure | ("Molecular Manufacturing and the Private Aircar") | 06:47 |
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| fenn | http://fennetic.net/irc/slow_cooker_PSC400.jpg | 06:59 |
| fenn | i don't like the blue backlight really | 07:00 |
| chris_99 | whatcha gonna do with it | 07:01 |
| fenn | not sure, any ideas? | 07:04 |
| cluckj | fenn, anything is programmable if you put a board on it | 07:06 |
| fenn | yeah but this has buttons and an LCD and possibly a temperature sensor | 07:06 |
| cluckj | so it's already theoretically programmable? | 07:06 |
| chris_99 | if you added some recirculation thing, sous vide could be fun | 07:07 |
| cluckj | aquarium pump | 07:07 |
| chris_99 | mmm | 07:07 |
| cluckj | some dude at nyc resistor had a frankenstein's monster sous vide cooker he made from a broken crock pot | 07:08 |
| fenn | why recirculation? it's being heated from all sides | 07:09 |
| cluckj | you want it to be an even temperature all around, with no hot spots | 07:10 |
| chris_99 | mmm | 07:10 |
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| chris_99 | i might try sous vide with my brewing system as that uses recirculation of water through an element + PID - https://www.anfractuosity.com/wp-content/uploads/2014/02/rims1.jpg | 07:11 |
| fenn | i'm amazed at how much people charge for PID temperature controllers | 07:12 |
| cuba | they are very cheap on alibaba | 07:13 |
| chris_99 | mine was like £20 i think or less | 07:13 |
| fenn | it's literally just a relay, a microcontroller, a thermocouple, and some knobs | 07:13 |
| cuba | including SSR/pt100 like 30$ | 07:13 |
| chris_99 | im gonna switch to using 1-wire temp probes probably + an STM ARM | 07:13 |
| fenn | why would anyone need a solid state relay for temperature control? | 07:13 |
| fenn | you're not recrystallizing silicon | 07:14 |
| superkuh | I used one for controlled crystallization of triglycine sulfate. | 07:14 |
| chris_99 | to switch the element without the relay breaking? | 07:14 |
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| fenn | "Triglycine sulfate (TGS) crystal is an important ferroelectric crystal used on a large spectrum of radiation detection. Crystals from this family are used as targeted vidicon materials." | 07:17 |
| fenn | .title http://proceedings.spiedigitallibrary.org/proceeding.aspx?articleid=971416 | 07:20 |
| yoleaux | SPIE | Proceeding | Triglycine sulfate (TGS) crystals for pyroelectric infrared detecting devices | 07:20 |
| fenn | engineering review article | 07:21 |
| fenn | hmm | 07:22 |
| fenn | paperbot: http://proceedings.spiedigitallibrary.org/proceeding.aspx?articleid=971416 | 07:22 |
| paperbot | http://diyhpl.us/~bryan/papers2/paperbot/Triglycine%20sulfate%20%28TGS%29%20crystals%20for%20pyroelectric%20infrared%20detecting%20devices.pdf | 07:23 |
| fenn | wow it worked | 07:25 |
| fenn | needs watermark scrubbing | 07:26 |
| fenn | the article is more an introduction than a review | 07:26 |
| chris_99 | i wonder if any publishers use invisble watermarks on images etc. | 07:26 |
| fenn | doubt it | 07:26 |
| fenn | they still use ftp servers for uploading manuscripts | 07:27 |
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| chris_99 | hehe | 07:28 |
| superkuh | This lab write-up was a valuable guide. http://physics.technion.ac.il/~jammia/advlab/advlab.htm | 07:30 |
| fenn | would it be possible to make a mechanical scanning infrared camera using one of these crystals? | 07:34 |
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| fenn | PIR sensors are cheap but small, which makes for poor SNR/bandwidth | 07:36 |
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| chris_99 | Anyone know the name of that super reflective material, thats used on projector screens | 07:53 |
| fenn | retro-reflective microspheres? | 07:54 |
| chris_99 | merci thats the one indeed | 07:55 |
| kanzure | reflective microwho? | 07:55 |
| fenn | .g "screen goo" | 07:55 |
| yoleaux | http://www.goosystemsglobal.com/ | 07:55 |
| fenn | i wonder how they get enough depth of field on those "projection mapping" music stages to keep everything in focus | 07:57 |
| chris_99 | so that screen goo is the same kind of stuff? | 07:57 |
| fenn | apparently | 07:58 |
| chris_99 | just found someone selling sample strips of 3M retroreflective stuff, i only need a teensy ammount | 08:00 |
| fenn | i got some yellow reflective tape for my bike | 08:01 |
| fenn | there is even "black" reflective tape which looks white at night (with a headlamp) | 08:01 |
| chris_99 | haha weird | 08:02 |
| fenn | wow $250/gallon | 08:04 |
| kanzure | 08:02 <+justanotheruser> .to xentrac Is there a way I can define a function arbitrarily using cams rather than a cam system just acting as an ASIC? | 08:04 |
| fenn | justanotheruser: a cam is a function plotted radially | 08:05 |
| justanotheruser | fenn: I know | 08:06 |
| fenn | why is kanzure on pacific time | 08:06 |
| kanzure | time is too confusing for me | 08:06 |
| justanotheruser | I am asking if I can set some of the inputs to define some function and the rest of the inputs to be inputs for that function | 08:07 |
| kanzure | someone taught me to read clocks and ever since i've regretted it | 08:07 |
| kanzure | "well that's fucked up" | 08:07 |
| fenn | yeah clocks are stupid | 08:07 |
| justanotheruser | >1425053278 | 08:08 |
| justanotheruser | >not using unix time | 08:08 |
| chris_99 | except ones that can sense gravity, those are pretty cool | 08:08 |
| fenn | that's a differential time gradient detector | 08:09 |
| fenn | or something | 08:09 |
| chris_99 | i was reading something about the latest generation of atomic clocks being so precise even from the top to the bottom of the room, they run at different rates | 08:10 |
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| kanzure | delinquentme: https://www.takeitapart.com/guide/94 | 08:16 |
| kanzure | delinquentme: http://diyhpl.us/~bryan/papers2/DNA/abi391/ | 08:16 |
| kanzure | delinquentme: http://diyhpl.us/~bryan/papers2/microfluidics/synthesis/Synthesis%20-%20Microfluidic%20PicoArray%20synthesis%20of%20oligodeoxynucleotides%20and%20simultaneous%20assembling%20of%20multiple%20DNA%20sequences%20(10%20kb).pdf | 08:19 |
| kanzure | hmm. | 08:33 |
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| kanzure | https://soundcloud.com/raphael-walter-meier/erich-von-kollar-presents | 09:38 |
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| kanzure | spock being mistaken for spock https://www.youtube.com/watch?v=z9G5ciMqFNM&t=5m30s | 09:51 |
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| nmz787_i | fenn: those weren't the books I photographed... the books I snapped pics of were in the back room, which would be behind Rich in the gigapan pic | 11:02 |
| fenn | did you at least pluck a hair from the transgenic goat? | 11:04 |
| nmz787_i | chris_99: nice cart! | 11:06 |
| nmz787_i | nah | 11:06 |
| nmz787_i | more impetus to produce my own DNA from scratch | 11:07 |
| nmz787_i | .wik dantzig | 11:30 |
| yoleaux | "Dantzig is a surname. Notable people with the surname include:" — http://en.wikipedia.org/wiki/Dantzig | 11:30 |
| nmz787_i | .wik Tobias Dantzig | 11:30 |
| yoleaux | "Tobias Dantzig (February 19, 1884 – August 9, 1956) was a mathematician of Baltic German and Russian American heritage, the father of George Dantzig, and the author of Number: The Language of Science (A critical survey written for the cultured non-mathematician) (1930) and Aspects of Science (New York, Macmillan, 1937)." — http://en.wikipedia.org/wiki/Tobias_Dantzig | 11:30 |
| nmz787_i | not to be confused with: | 11:31 |
| nmz787_i | .wik glen dnazig | 11:31 |
| yoleaux | "Glenn Danzig (born Glenn Allen Anzalone; June 23, 1955) is an American singer, songwriter and musician from Lodi, New Jersey. He is a founder of bands the Misfits, Samhain, and Danzig. He owns the Evilive record label as well as Verotik, an adult-oriented comic book publishing company." — http://en.wikipedia.org/wiki/Glenn_Danzig | 11:31 |
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| chris_99 | nmz787_i, working on any electronic projects atm? | 11:43 |
| kanzure | https://soundcloud.com/djgarretts/garrett-s-digitally-imported-15th-anniversary-mix | 11:44 |
| nmz787_i | chris_99: lately I've been spending most of my free time procrastinating for or doing actual classwork | 11:50 |
| chris_99 | heh, you almost finished at uni? | 11:52 |
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| nmz787_i | yeah, should have this latest experiment to write-up, one more next week, and maybe I will re-write one previous that I did poorly on | 11:52 |
| nmz787_i | then I just have to take some 2-hour english test to get credit for english-101 | 11:53 |
| chris_99 | this is was a masters course right? | 11:54 |
| nmz787_i | nah | 11:55 |
| nmz787_i | custom 7 or 8 year bachelors program | 11:55 |
| chris_99 | ah yeah | 11:57 |
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| sheena | nmz787_i: topic of class? | 12:19 |
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| nmz787_i | sheena: instrumental analysis is the title... it is using most of the cool chemistry detection equipment (GC/MS, fluorimetry, voltamettry, spectrophotometry, atomic absorbtion/emission spectrophotometry, potentiometry, liquid chromatography with UV spectrophotometry) | 12:54 |
| chris_99 | neat :) | 12:54 |
| sheena | so you're learning to tell what something is made of without knowing ahead of time ..? | 12:54 |
| nmz787_i | I guess that's the idea... we know all the stuff ahead of time though | 12:55 |
| sheena | for learnign purpose, i'd assume this would need ot be ttrue | 12:55 |
| nmz787_i | like for voltammetry we were looking at/for cadmium and lead in cigarette extract along with e-cig extract | 12:55 |
| nmz787_i | for GC/MS we were looking for nicotine concentration in those | 12:56 |
| chris_99 | have you done any electrochemistry stuff such as with a potentiostat | 12:59 |
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| nmz787_i | chris_99: I did ASV (anodic stripping voltammetry).... which is where you make one of the electrodes the opposite charge of some ion/metal of interest, causing the ions to plate onto the electrode (I guess this might be considered electroplating).... then you slowly ramp the voltage toward the opposite polarity, in small steps, and during each step you monitor the current through the analyte.... the idea is that certain ions will | 13:59 |
| nmz787_i | pop off the plate at certain voltages... and you can tell when they pop off by watching the current spike around that voltage | 13:59 |
| nmz787_i | for potentiometry we did the classic pH, then also pCl and pBr | 14:00 |
| nmz787_i | (for chlorine and bromine) | 14:00 |
| chris_99 | cool! | 14:01 |
| nmz787_i | basically that consists of an electrometer circuit, and an electrode that is allowed to interact only with the ions of interest (so you need some special filter, often some membrane, or for pH it's just glass) | 14:01 |
| nmz787_i | http://www.tau.ac.il/~advanal/StrippingVoltammetry_files/image040.gif | 14:01 |
| nmz787_i | http://web.chem.ucsb.edu/~kwp/cheapstat/ | 14:02 |
| chris_99 | i bought a chip that seems quite nice, that's got spi/i2c i foget which that you connect a pH electrode too | 14:02 |
| nmz787_i | http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0023783 | 14:02 |
| chris_99 | yeah i've seen the cheapstat | 14:02 |
| nmz787_i | http://www.iorodeo.com/content/building-cheapstat-open-source-potentiostats | 14:02 |
| nmz787_i | it's cool because the xray detector I was working on basically uses an electrometer that is hooked up to a photodiode | 14:03 |
| chris_99 | cool, whatcha gonna use that for? | 14:03 |
| chris_99 | you can detect x-rays with a photodiode?! | 14:03 |
| nmz787_i | yeah, a PIN photodiode | 14:05 |
| nmz787_i | normally used for NIR communications | 14:06 |
| chris_99 | aha interesting | 14:06 |
| nmz787_i | idea was initially sparked as a method to determine the remaining thickness of a hole being machined by an ion beam into a metal | 14:06 |
| chris_99 | oh, how do the x-rays relate to this? | 14:07 |
| nmz787_i | .wik bremsstrahlung | 14:07 |
| yoleaux | "Bremsstrahlung (German pronunciation: [ˈbʁɛmsˌʃtʁaːlʊŋ] ( listen), from bremsen "to brake" and Strahlung "radiation", i.e. "braking radiation" or "deceleration radiation") is electromagnetic radiation produced by the deceleration of a charged particle when deflected by another charged particle, typically an electron by an atomic nucleus." — http://en.wikipedia.org/wiki/Bremsstrahlung | 14:07 |
| chris_99 | aha cool | 14:07 |
| nmz787_i | ion shoots into target, knocking off sub-molecular chunks | 14:07 |
| chris_99 | and you get x-rays back? | 14:08 |
| nmz787_i | yep the electrons changing orbits and junk creates photons | 14:08 |
| chris_99 | so the number of photons returned would mean something? to do with the thickness you've milled | 14:09 |
| nmz787_i | well the xrays can be re-absorbed in the bulk material... so their liklihood of getting to the detector increases as there is less material | 14:09 |
| chris_99 | ah | 14:09 |
| nmz787_i | (as milling proceeds) | 14:09 |
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| fenn | huh i actually chatted with aaron rowe about potentiostats, didn't know he made an actual open source hardware project | 14:14 |
| fenn | context DIY urinalysis | 14:14 |
| nmz787_i | IMO the worst instruments were the potentiostate and the mass-spec | 14:16 |
| chris_99 | why so | 14:17 |
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| nmz787_i | noise, lack of repeatability, lack of data trending correctly with little error | 14:19 |
| nmz787_i | it's possible we just needed more data for each sample, to boost the statistics | 14:20 |
| nmz787_i | I've had trouble with pH type meters before, endlessly drifting | 14:20 |
| nmz787_i | the mass-spec was surprising as it was a relatively new instrument | 14:20 |
| chris_99 | yeah i've heard about pH meters needing lots of calibration? and them also needing to be thrown away before they get too old | 14:21 |
| nmz787_i | but of the samples we ran twice, we got different data each time and it was bad enough that I didn't write much praise for it in my report | 14:21 |
| nmz787_i | I know the electrodes can foul | 14:22 |
| nmz787_i | but I am not sure where the drift came into play... if it was some interaction between a slow-to-equilibrate electrode/selective-membrane and the electrometer leakage current... or something else | 14:23 |
| chris_99 | ahh | 14:23 |
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| fenn | heh "Dr. Aaron Rowe Ph.D. 2011 Currently: V.P. of Clinical Research, Integrated Plasmonics Corporation" | 14:24 |
| nmz787_i | huh | 14:27 |
| chris_99 | i'm curious whats the difference between a cheapo $10 pH electrode and some fancy pants expensive one | 14:27 |
| fenn | the price! | 14:27 |
| chris_99 | haha | 14:27 |
| nmz787_i | http://www.quebs2015.org/participants--program.html | 14:30 |
| nmz787_i | chris_99: hopefully the ADC/electrometer circuit is better with more $ | 14:30 |
| chris_99 | i mean just the elctrode though | 14:31 |
| chris_99 | no electronics | 14:31 |
| chris_99 | par example http://shop.hannainst.com/hi10530.html?id=040006&ProdCode=HI%252010530 | 14:32 |
| cluckj | about $160, it looks like | 14:33 |
| chris_99 | yeah i just have a $10 one | 14:34 |
| nmz787_i | the actual electrode probably isn't very different | 14:34 |
| chris_99 | this is what i was thinking if its just glass+chemical | 14:34 |
| cluckj | a $10 one that's got electrolytes in it? | 14:35 |
| chris_99 | yes | 14:35 |
| chris_99 | how else do they work? | 14:35 |
| nmz787_i | "The glass tip uses a special LT (low temperature) glass formulation with a lower resistance of approximately 50 megaohms compared to GP (general purpose) glass with a resistance of about 100 megaohms. This is beneficial since many food products are stored at low temperatures. As the temperature of the glass decreases in the sample, the resistance of the LT glass will approach that of GP glass. If using GP glass, the resistance | 14:35 |
| nmz787_i | would increase above the optimum range, resulting in increased impedance and ultimately affecting the measurement." | 14:35 |
| nmz787_i | lower resistance, less johnson noise I think | 14:35 |
| nmz787_i | unles you use a chopper | 14:35 |
| nmz787_i | bbl | 14:35 |
| cluckj | ^ | 14:36 |
| chris_99 | ah, so it's some fancy glass | 14:38 |
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| kanzure | http://www.redorbit.com/news/science/1113239467/lego-inspired-microfluidics-092214/ | 15:12 |
| chris_99 | heh neat | 15:15 |
| kanzure | yeah but i'm not sure if practical... seems like many of the things you want to do may require less space and demand shorter interconnects... so not sure how this works out in practice.. | 15:17 |
| chris_99 | is the liquid itself travelling on a single plane though | 15:24 |
| chris_99 | in each 'chip' | 15:24 |
| nmz787_i | i thought PNAS was open... did that change or is my memory bad? | 15:44 |
| nmz787_i | paperbot: http://www.pnas.org/content/111/42/15013.full.pdf+html?sid=f79338f3-77e3-4552-971c-3da9d7337bda | 15:44 |
| paperbot | http://libgen.info/scimag/get.php?doi=10.1073%2Fpnas.1414764111 | 15:44 |
| nmz787_i | paperbot: http://www.pnas.org/content/111/42/15013.short | 15:46 |
| paperbot | http://libgen.info/scimag/get.php?doi=10.1073%2Fpnas.1414764111 | 15:46 |
| nmz787_i | of course the supplement is avail http://www.pnas.org/content/suppl/2014/09/16/1414764111.DCSupplemental/pnas.201414764SI.pdf | 15:46 |
| nmz787_i | i wonder why parallela seems to have stopped making products, and never released their 64-core processor | 15:54 |
| chris_99 | didn't they have one with even more cores than that too | 16:00 |
| chris_99 | i'm still not sure how different their actual cores are from a GPU type system | 16:01 |
| chris_99 | or even an FPGA using OpenCL | 16:02 |
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| nmz787_i | aren't GPUs just vector processors... meaning they can do the same operation on many many data at once, but can't actually do different 'processing' for each data address/chunk | 16:05 |
| nmz787_i | (i don't know but was thinking about this recentlyt | 16:05 |
| nmz787_i | ) | 16:05 |
| chris_99 | iirc there are actually different parts of the GPU that can run different instructions | 16:06 |
| chris_99 | maybe i'm wrong | 16:08 |
| chris_99 | as they are classed as SIMD by the looks of it | 16:08 |
| chris_99 | so yeah soundsd like you're right | 16:10 |
| chris_99 | Epiphany is MIMD | 16:10 |
| nmz787_i | "For the MEBDW system with a large beam size, the fact that 30 µC/cm2 means only about 10 electrons deposited in a pixel of 2.25×2.25 nm2 area, implies that the simulation of incident electrons at a beam diameter between 20 and 35 nm, much larger than the pixel size, cannot be simply represented by a Gaussian intensity. These 10 electrons randomly spread into the circular area around the target pixel with a specific beam spot | 16:15 |
| nmz787_i | distribution. Accumulation of the electrons and consequent scatterings from all pixels within a feature provides the required dosage and forms the imaging intensity. Although the adjacent spots will overlap each other, the sparse distribution still introduces the noise to the imaging process. The increase of the dosage delivers more electrons and reduces the statistical shot noise. The bigger the beam size is, the worse divergence | 16:15 |
| nmz787_i | it causes. The lower dosage, the sparser distribution it can be." | 16:15 |
| nmz787_i | "A compromise solution for choosing an appropriate probe size for enough resolution and beam current, as well as a moderate resist sensitivity are the keys to the success of the MEBDW technology" | 16:17 |
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| nmz787_i | .title https://www.kickstarter.com/projects/coflynn/chipwhisperer-lite-a-new-era-of-hardware-security | 16:21 |
| yoleaux | ChipWhisperer-Lite: A New Era of Hardware Security Research by Colin O'Flynn — Kickstarter | 16:21 |
| chris_99 | cool, didn't knwo that was on KS, i've seen his hackaday project page | 16:22 |
| chris_99 | nmz787_i, this is the plan for the ToF chip - https://www.anfractuosity.com/files/hydro.png | 16:24 |
| nmz787_i | cool, I rememeber talking about this before a bit | 16:31 |
| nmz787_i | did you ever decide to look at some cells with a fluidic | 16:31 |
| nmz787_i | ? | 16:31 |
| chris_99 | still need to order some, the folks from thailand can make them out of two chips, to do the mixing | 16:32 |
| chris_99 | and observation | 16:32 |
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| delinquentme | nmz787, | 18:58 |
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| nmz787 | delinquentme: sup | 20:53 |
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