| --- Log opened Tue Sep 04 00:00:16 2012 | ||
| Mokstar | that'd be neat | 00:00 |
|---|---|---|
| Mokstar | wouldn't the storage be a bit expensive? | 00:00 |
| kanzure | i can pay it | 00:00 |
| kanzure | at most it's like 50 TB of papers | 00:01 |
| Mokstar | I've always wanted to build a distributed database that operates similar to a bitcoin blockchain, but trims itself | 00:01 |
| kanzure | which is sorta like having an expensive fancy car hobby | 00:01 |
| Mokstar | yeah, that's doable | 00:01 |
| foucist | kanzure: what do you mean? is hplusroadmap a website?!?!?!? :P | 00:01 |
| foucist | i've never been to it.. i don't think i shall ever! muwahaha | 00:02 |
| kanzure | no i meant the "pay college students for access" scheme | 00:02 |
| Mokstar | well, are the papers compressed? | 00:03 |
| Mokstar | duh, I guess | 00:03 |
| kanzure | Mokstar: my 50 TB calculation is assuming 50 million papers at an average of 1 MB (so, basic pdf) | 00:03 |
| kanzure | some papers are just image scans and are multiple megabytes, but mostly they are <1 MB if they are just text and one or two pics | 00:03 |
| Mokstar | are you gonna try to index the content? | 00:04 |
| kanzure | yes | 00:04 |
| kanzure | btw we already have like 80 different scraper formats | 00:04 |
| kanzure | delinquentme went and published it on hacker news a few months ago -_- but it was the broken version :P | 00:04 |
| Mokstar | do you have a web service? | 00:04 |
| Mokstar | web API | 00:04 |
| kanzure | it is a web service. | 00:04 |
| kanzure | no it's not public right now :( | 00:04 |
| Mokstar | I'm working on embedding X3D models into static pages, and the controls of it | 00:05 |
| kanzure | right now the limiting factor is ezproxy accounts :P | 00:05 |
| Mokstar | and had the thought of a rotating brain with selectable regions that you could associate, use as search terms, for relevant papers | 00:05 |
| kanzure | i'm sure your wife would share her account/access with me if i asked nicely, but would you ask her if she would be willing to be paid to share it? | 00:05 |
| Mokstar | hehehe, sure! | 00:05 |
| kanzure | and if so, what does she think a fair price is? | 00:06 |
| kanzure | i'm sure the market would determine that | 00:06 |
| Mokstar | I dunno | 00:06 |
| kanzure | but it might be anything from "Enough to pay my dumb student debt" to "$5/mo" | 00:06 |
| Mokstar | hah! I think we're at $20k now :p | 00:06 |
| kanzure | 500 people x $10/mo on one account => a reasonable dent in $20k | 00:07 |
| Mokstar | wow | 00:07 |
| kanzure | right? | 00:07 |
| Mokstar | hmm | 00:07 |
| Mokstar | think they'd notice? | 00:08 |
| kanzure | yes | 00:08 |
| Mokstar | hahah | 00:08 |
| kanzure | i know they do notice | 00:08 |
| kanzure | but.. all previous cases have been something like "it was posted publicly" | 00:08 |
| joshcryer | how so? been caught before? | 00:08 |
| Mokstar | do they cut people off? | 00:08 |
| kanzure | which could mean anything.. maybe they noticed 1 person using it, or maybe they noticed 2000 people using it | 00:08 |
| kanzure | yes they cut people off when they notice abuse | 00:08 |
| kanzure | but the fun part is finding that limit ;) | 00:08 |
| joshcryer | you would have to have a mechanism so that only 1 ip at a time uses the system | 00:08 |
| kanzure | no that's not important | 00:08 |
| kanzure | they aren't detecting simultaneous users | 00:08 |
| joshcryer | premium accounts would be personal VPN access | 00:08 |
| joshcryer | oh | 00:09 |
| kanzure | joshcryer: it's not a vpn | 00:09 |
| Mokstar | I could analyze their system | 00:09 |
| kanzure | it's usually OCLC's ezproxy software, which is just an http thing | 00:09 |
| kanzure | eg http://sciencedirect.ezproxy.lib.utexas.edu:2048/myarticle.pdf | 00:09 |
| joshcryer | how do you know it's not per ip? | 00:09 |
| kanzure | because the whole point is to allow off-campus access | 00:10 |
| joshcryer | yeah, but one account = one user = one ip | 00:10 |
| kanzure | ezproxy is proprietary software and doesn't have more than one or two programmers working on it | 00:10 |
| kanzure | i've disassembled it a bit and looked through it - it's not that sophisticated | 00:11 |
| joshcryer | fascinating | 00:11 |
| joshcryer | the project is easier then than it seems | 00:11 |
| kanzure | what happens is that the librarians get notified by the publishers or something, and they are like "hmmmm" and then pop the user's account gets reset | 00:11 |
| kanzure | s/librarians/sysadmins | 00:11 |
| kanzure | and, if the user is intentionally giving out access, that's easy to fix.. just stop paying that college student | 00:11 |
| joshcryer | I assume then that it's based more on level of "researching" / "downloading" than IP | 00:12 |
| kanzure | yes | 00:12 |
| joshcryer | OK, that makes sense | 00:12 |
| kanzure | if all of this activity is centralized through my server i could collect data to determine what these limits are | 00:12 |
| kanzure | i bet on different campuses it's different | 00:12 |
| joshcryer | clever | 00:12 |
| kanzure | obviously 1M papers/day through 1 account shouldn't be allowed | 00:12 |
| kanzure | but... probably a few thousand will be okay | 00:12 |
| Mokstar | "I'm analyzing them for statistics!" | 00:13 |
| Mokstar | "I'm mapping references and analyzing word count and sentence length relationships!" | 00:13 |
| kanzure | anywho it would be easy to collect data like, "oh hm, after 200 people logged into accounts from MIT, they get reset. let's put the limit at 200 people-ip for MIT access." | 00:13 |
| kanzure | so uh. which ones of youse are students? | 00:16 |
| Mokstar | I was contemplating going back to school | 00:26 |
| kanzure | until you reailzed how awful it would be? | 00:26 |
| Mokstar | until I realized I couldn't quit my day job :p | 00:27 |
| kanzure | archels: would you sell? | 00:28 |
| Mokstar | hopefully I'll be able to hang on to enough neuroplasticity by the time I don't need to work for the man anymore | 00:28 |
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| joshcryer | Mokstar, good decision, who wants student debt ;P | 00:32 |
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| archels | kanzure: nein, don't want to end up like Aaron Swartz. | 02:02 |
| archels | I still have paper access through my old university because I am member of a radio amateur club; perhaps you can find some sort of student's association to sponsor and they will give you ssh access on one of their boxen? | 02:03 |
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| nmz787 | kanzure: ping | 07:03 |
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| nmz787 | ThomasEgi: you have a wireless charging circuit? How big is it? | 07:16 |
| ThomasEgi | consists of 2 parts | 07:16 |
| ThomasEgi | the base station | 07:16 |
| ThomasEgi | and the receiver | 07:16 |
| ThomasEgi | it is as small as you can get the parts for. power output will drop with decreasing size tho | 07:17 |
| ThomasEgi | it's pretty simple. just 2 LC circuits | 07:17 |
| nmz787 | oh, so no ICs? | 07:22 |
| nmz787 | i've seen some ICs | 07:22 |
| nmz787 | but I guess they were tuned really well or something | 07:22 |
| nmz787 | vs just using LC | 07:22 |
| nmz787 | ThomasEgi: are you an EE | 07:23 |
| nmz787 | ? | 07:23 |
| nmz787 | this was it http://www.powercastco.com/ | 07:23 |
| nmz787 | I would like a wireless power receiver, coupled with a wireless transmitter that is modulated by the output of a photodiode/phototransistor/photoresistor | 07:24 |
| ThomasEgi | i am partly EE. more a mix between EE, clasicall mechanical engineering and informatics | 07:25 |
| nmz787 | cool | 07:26 |
| ThomasEgi | of course there are ic's that do the task. some are very convenient | 07:26 |
| nmz787 | and the whole package would be autoclavable | 07:26 |
| nmz787 | so 130-150 degrees C | 07:26 |
| nmz787 | oh I guess autovlave is technically 121 C | 07:27 |
| ThomasEgi | that chip you linked works in the MHz range. which is pretty ok, but hard to work with unless you have the lab equipment or good simulation tools at hand | 07:27 |
| nmz787 | powercast told me this when I asked about autoclaving their IC "The encapsulation lid is plastic and the components are rated to 85C. PCB reflow can be a lot hotter, but it is only for a short time.Can you tell me more about your application" | 07:27 |
| ThomasEgi | the LC sollution works at 128kHz. equipment for tuning those is really cheap and readily available. there are also ready to use IC's for that frequency that have selftuning capability | 07:28 |
| ThomasEgi | like the one from Texas Instruments. it also comes with a lithium-batter management ciruit and RFID frontend. | 07:29 |
| nmz787 | hmm | 07:30 |
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| ThomasEgi | bidirectional rfid btw. | 07:30 |
| nmz787 | i think my requirement doesn't need a battery, if operations could be sustained with just wireless power on all the time | 07:31 |
| ThomasEgi | so that one tiny chip only requires a coil and a cap as external components. and you get power, battery management and bidirectional communication. | 07:31 |
| nmz787 | but yeah i want to make it autoclavable, which I think sets this problem into a very unique space | 07:31 |
| ThomasEgi | wirless power has a very short range. | 07:31 |
| nmz787 | RFID as comms? | 07:31 |
| nmz787 | or just as ID? | 07:31 |
| ThomasEgi | as communication | 07:33 |
| ThomasEgi | it works both ways | 07:33 |
| ThomasEgi | the texas instruments chip has a storage temperature of 125 degrees | 07:35 |
| ThomasEgi | specified as one cycle up to 1000h | 07:35 |
| ThomasEgi | peak temp of the solder profile is 260 degrees C | 07:37 |
| ThomasEgi | how long would autoclaving take? | 07:38 |
| nmz787 | hmm | 07:40 |
| nmz787 | i think 20 mins, but maybe up to 40 | 07:40 |
| nmz787 | but the device would likely get autoclaved after every use, so maybe once a day | 07:41 |
| ThomasEgi | hm... that... probably won't be too good | 07:44 |
| ThomasEgi | what kind of device would that be? | 07:44 |
| nmz787 | wireless autoclavable photosensor | 07:44 |
| nmz787 | so it reports the light level | 07:45 |
| nmz787 | and it would something like a magnetic stir-bar | 07:45 |
| ThomasEgi | hm.. | 07:45 |
| nmz787 | with a Red LED on the side of the flask being stirred... the device would report the turbidity | 07:46 |
| nmz787 | this was actually asked for by Tom Knight, of MIT | 07:46 |
| nmz787 | years ago on DIYbio | 07:46 |
| ThomasEgi | i would highly recommend to just use a PTFE coated platinum temperature sensor for that | 07:47 |
| ThomasEgi | oh wait light sensor | 07:47 |
| ThomasEgi | not photo. | 07:47 |
| nmz787 | hmm? | 07:47 |
| nmz787 | light != photo ??? | 07:47 |
| ThomasEgi | for a split of a second i got it mixed up with temperatures | 07:48 |
| ThomasEgi | nah. i'd recommend something different | 07:48 |
| ThomasEgi | like 2 fibre-optics, | 07:49 |
| ThomasEgi | with a gap for the liquid to go in | 07:49 |
| nmz787 | yeah, i think that opens up contamination a bit more | 07:49 |
| nmz787 | just having the wires stick through a cap or stopper | 07:49 |
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| ThomasEgi | at least it wouldn't have any semiconductors in a part that requires autoclaving | 07:50 |
| ThomasEgi | if it really has to be something like a stirring bar. i'd rather recommend to avoid all semiconductors if possible. | 07:51 |
| ThomasEgi | maybe working a reflecting mirror or so. | 07:51 |
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| ThomasEgi | maybe a prism-like mirror or so. | 07:51 |
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| ThomasEgi | with multiple light sensors around your flask you could also calculate the ammount of light scattered and reflected more precisely | 07:52 |
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| nmz787 | hmm | 07:53 |
| ThomasEgi | or.. not using any kind of whatever inside the containment vessel | 07:53 |
| nmz787 | stirbar + mirror does sound easy | 07:53 |
| ThomasEgi | and just work with transmitting and reflected light | 07:53 |
| nmz787 | the path length for the light would just effectively be doubled | 07:53 |
| ThomasEgi | if you use AC modulated light, you can easily avoid DC errors from daylight/environmental light | 07:54 |
| chris_99 | stirbar + mirror, whatcha making? | 07:54 |
| ThomasEgi | with multiple sensors yu should be able to get a number of data points which you could match against a physical model | 07:54 |
| nmz787 | growth sensor... aka turbidostat | 07:54 |
| nmz787 | aka optical density sensor | 07:54 |
| ThomasEgi | with no requirement for autoclaving, probably higher accuracy. and a whole lot easier and cheaper to build | 07:55 |
| chris_99 | oh interesting | 07:55 |
| nmz787 | yeah the old fashioned method is to use a side-arm flask, and every so often take the flask off the stirrer and tip some liquid into the sidearm, then stick the side-arm (about the size of a test tube) into a spectrometer | 07:55 |
| ThomasEgi | not only could you get the ammount of light that travels through but also the one that gets scattered sideways. and the overall tranmsittance of light | 07:55 |
| nmz787 | ThomasEgi: well the stirbar-mirror would still need autoclaved | 07:56 |
| ThomasEgi | if you don't use one. | 07:56 |
| ThomasEgi | i mean i don't know your flasks | 07:56 |
| ThomasEgi | you could aswell use a static mirror. | 07:56 |
| ThomasEgi | but hey. that's a mechanical thing | 07:56 |
| ThomasEgi | you can heat it until it melts | 07:56 |
| ThomasEgi | should be no big deal | 07:56 |
| nmz787 | yeah | 07:56 |
| ThomasEgi | doesnt even need to be rotating. just a small mirror or so. maybe a polished metal plate molded in glass or so | 07:57 |
| ThomasEgi | you know how blood oxymeters work? | 07:59 |
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| ThomasEgi | that could be adapted to work in a simmilar way. to messure the ratio between reflected ,transmitted and otherwise scattered light i guess | 08:00 |
| nmz787 | hmm | 08:01 |
| nmz787 | sortof, but that's a chromatic shift i though | 08:01 |
| nmz787 | coupled with the ratio | 08:01 |
| ThomasEgi | well it wouldnt work exactly like blood oxymeters | 08:02 |
| ThomasEgi | but simmilar | 08:02 |
| ThomasEgi | ah. short check on how it usualy gets messured. with 2 messurements. once tre transmitting part. once the light that scatters off 90° | 08:05 |
| ThomasEgi | usualy with infrared light | 08:06 |
| ThomasEgi | doesnt sound very hard to build | 08:06 |
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| kanzure | nmz787: pong | 08:42 |
| nmz787 | hey | 08:44 |
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| chris_99 | nmz787, seen this 'While most turbidostats use a spectrophotometer/turbidometer to measure the optical density for control purpose' | 09:38 |
| nmz787 | hmm? | 09:39 |
| chris_99 | so you need a spectrophotometer don't you | 09:39 |
| nmz787 | no | 09:39 |
| nmz787 | you can use one | 09:40 |
| nmz787 | most optical density for common lab bugs is 600nm | 09:40 |
| nmz787 | or thereabouts | 09:40 |
| nmz787 | "A word of warning though, since the OD of a sample is dependent on the size and shape of the particles in it, different cell lines can have completely different relationships between OD and cells/mL. This means that a separate calibration will be needed for each cell type you use, which is tedious, but better than recording meaningless and arbitrary numbers in your lab book." | 09:41 |
| nmz787 | "Nick founded Bitesize Bio in 2007 to create a central community and knowledge resource for bioscience researchers. After a batchelor's, PhD and 10 years working in biotech, Bitesize Bio inspired him to turn his hand to publishing. He now spends his... | 09:42 |
| nmz787 | " | 09:42 |
| nmz787 | he misspelled bachelors | 09:42 |
| chris_99 | does OD relate to specific gravity? | 09:42 |
| chris_99 | i'm guessing not | 09:42 |
| nmz787 | no, i dont think so | 09:42 |
| nmz787 | the yeast generally flock (settle) | 09:42 |
| chris_99 | what are you using it for, yeast? | 09:42 |
| nmz787 | but you could probably determine % alcohol with a spectrometer | 09:42 |
| nmz787 | no | 09:42 |
| nmz787 | just something that needs built | 09:43 |
| chris_99 | ah | 09:43 |
| chris_99 | yeah you need IR spectrometry for alcohol | 09:43 |
| chris_99 | you man measure specific gravity though with a refractometer | 09:44 |
| nmz787 | a refractometer can be messed with by sugar type tho too | 09:45 |
| chris_99 | yeah i guess, apparently it's reasonably accurate for beer | 09:46 |
| nmz787 | http://sciencebrewer.com/experiments/ | 09:46 |
| nmz787 | "Refractometer Experiment: demonstrates that hop oils can throw off refractometer readings." | 09:46 |
| nmz787 | sorry oil not sugar | 09:46 |
| chris_99 | interesting | 09:46 |
| chris_99 | hadn't heard of that | 09:46 |
| chris_99 | i ordered a fibre optic refractometer recently for beer, to measure the SG without having to take out samples | 09:48 |
| nmz787 | "However, I now intend to use my hydrometer in addition to my refractometer post boil." | 09:48 |
| chris_99 | yeah i normally use a hydrometer though | 09:48 |
| nmz787 | was it you who posted about a $200 spectrophotometer? | 09:49 |
| chris_99 | yes | 09:49 |
| nmz787 | http://www.science-surplus.com/products/spectrometers | 09:49 |
| nmz787 | there's the non-ebay likn | 09:50 |
| nmz787 | link | 09:50 |
| nmz787 | are you in UK though? | 09:50 |
| chris_99 | yeah i've seen that, yeah i am | 09:50 |
| nmz787 | ahh | 09:50 |
| nmz787 | so maybe ebay is better | 09:50 |
| chris_99 | yeah | 09:50 |
| chris_99 | they also sell calibrated ones | 09:50 |
| chris_99 | on the website | 09:50 |
| chris_99 | the ones on ebay are uncalibrated | 09:51 |
| nmz787 | http://www.meetup.com/Biohackers-NYC/events/77944522/?a=md1_grp&rv=md1 | 09:58 |
| nmz787 | "Practical Approaches to Transhumanism" | 09:58 |
| nmz787 | i.e. grindhouse wetware is talking to a bunch of ppl | 09:58 |
| nmz787 | "19 attending" | 09:58 |
| nmz787 | here are the alignment instructions | 10:02 |
| nmz787 | https://docs.google.com/viewer?a=v&pid=sites&srcid=c2NpZW5jZS1zdXJwbHVzLmNvbXx3d3d8Z3g6NGJlYTc2ZGNmZDg0NGFlNA&pli=1 | 10:02 |
| nmz787 | i should buy one of these to play around with, and finish the openspectrometer | 10:02 |
| chris_99 | they use a Hg-Ar lamp | 10:04 |
| chris_99 | apparently | 10:04 |
| nmz787 | dick head fish http://phys.org/news/2012-08-penis-head-fish-vietnam.html | 10:17 |
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| skorket | nmz787, what state is the open spectrometer project? | 10:26 |
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| nmz787 | unfinished | 10:32 |
| nmz787 | i got the CCD control working on the parallax propeller using only 1 core | 10:33 |
| chris_99 | what CCD did you use? | 10:33 |
| nmz787 | started working on getting the ADC setup correctly with the USB 2.0 chip to pipe data out | 10:33 |
| nmz787 | TCD1304AP | 10:33 |
| nmz787 | there are 2 videos here http://www.youtube.com/user/ntm787/videos | 10:34 |
| chris_99 | cool :) | 10:35 |
| nmz787 | I have been figuring out a lot of optics stuff though lately, so I think I'm ready to give openspectrometer some more development push | 10:35 |
| skorket | nmz787, where did you purchase the ccd? | 10:44 |
| nmz787 | found an ebay seller and PMed him | 10:44 |
| nmz787 | he was in HK or china | 10:44 |
| nmz787 | about $10 | 10:44 |
| nmz787 | I don't have the propeller code on github | 10:45 |
| skorket | this? http://www.ebay.com/itm/1PCS-TCD1304AP-CCD-LINEAR-IMAGE-SENSOR-/221068542987?pt=LH_DefaultDomain_0&hash=item3378b6440b#ht_1455wt_908 | 10:45 |
| nmz787 | er, hrmm, I will get it on there today | 10:45 |
| nmz787 | not sure if that's the same seller | 10:45 |
| skorket | and why'd you choose propeller? | 10:45 |
| nmz787 | I wanted lots of power, ease of use | 10:46 |
| nmz787 | 1 of 8 cores is for the CCD, then I can download a library from http://obex.parallax.com/ for SD card stuff | 10:47 |
| nmz787 | that would take 1 core | 10:47 |
| nmz787 | then another core for the USB controller | 10:47 |
| nmz787 | and maybe another core for doing compression or real-time analysis... 'plugins' | 10:48 |
| nmz787 | uh, another core to listen to control comms from the computer | 10:48 |
| nmz787 | (as I envisioned hooking the ADC output directly to the USB to parallel I/O controller | 10:49 |
| nmz787 | rather than bringing the bits into the CPU | 10:49 |
| nmz787 | for high-speed streaming | 10:49 |
| nmz787 | but bringing them into the CPU may also work, if I use the registers | 10:50 |
| skorket | interesting. How much is an 8 core propeller? | 10:50 |
| skorket | roughly? | 10:50 |
| skorket | and do you have any experience with the linux tool chain for it? | 10:51 |
| nmz787 | $8 | 10:51 |
| nmz787 | no, but I think I looked about a month ago, and there was development since the last time I'd looked | 10:51 |
| nmz787 | but in windows it was as easy as using Arduino | 10:51 |
| nmz787 | i.e. 1 file download, unzip, plug in the propeller to a USB 2 Serial, and bam | 10:52 |
| nmz787 | I was playing with the idea of using an ARM | 10:52 |
| nmz787 | but they're really a PITA to get setup if you don't NEED an ARM | 10:52 |
| kanzure | blaah windows | 10:52 |
| nmz787 | rather, if you haven't set on up before | 10:53 |
| nmz787 | skorket: also 80MHz (mine is running fine at 96MHz) | 10:57 |
| skorket | I'm like working with the AVR but I think that's mostly because of familiarity. Maybe I should invest in a propeller... | 10:58 |
| skorket | *I | 10:58 |
| nmz787 | there's a great dev board for it | 10:58 |
| nmz787 | any of these http://www.parallax.com/Store/Microcontrollers/PropellerDevelopmentBoards/tabid/514/List/0/CategoryID/73/Level/a/SortField/0/Default.aspx | 11:00 |
| skorket | What would you recommend to get started? | 11:00 |
| nmz787 | depends what you want to do, this is cheap and has some buttons and big pin headers | 11:01 |
| nmz787 | http://www.parallax.com/Store/Microcontrollers/PropellerDevelopmentBoards/tabid/514/CategoryID/73/List/0/SortField/0/Level/a/ProductID/748/Default.aspx | 11:01 |
| nmz787 | "Pads for sigma-delta A/D circuitry (two resistors and two capacitors, both 0603) for using the Sigma-Delta A/D AppNote" | 11:02 |
| nmz787 | delta-sigma ADC is a pretty cool technique | 11:02 |
| nmz787 | its used a lot in ADC ICs, but the speed of the propeller lets you do some lower res/slower ADC too | 11:03 |
| nmz787 | i think it only uses 1 or 2 digital IO pins | 11:03 |
| nmz787 | and there | 11:03 |
| nmz787 | there's a library for it | 11:03 |
| skorket | thanks, I'll look into it | 11:04 |
| nmz787 | there's this too | 11:05 |
| nmz787 | more expensive http://www.parallax.com/Store/Microcontrollers/PropellerKits/tabid/144/CategoryID/20/List/0/SortField/0/Level/a/ProductID/467/Default.aspx | 11:05 |
| skorket | yeah, I saw that one. I have to look at it more but that looks promising. My main concern is the linux toolchain. I remember we talked about it before, didn't we? I did a quick search then and it looked like there was some success ranging from a native toolchain to some toolchain involving wine | 11:08 |
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| nmz787 | bbl | 11:09 |
| nmz787 | i think there is a non-wine way | 11:09 |
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| kendoka | 你好 | 11:39 |
| Mariu | ä½ å¥½ | 11:39 |
| Mariu | blast | 11:39 |
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| kanzure | back | 12:58 |
| kanzure | i don't think wine is a good thing to depend on | 12:59 |
| kendoka | whiskey is pretty reliable | 13:03 |
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| kanzure | kendoka: indeed | 13:06 |
| kanzure | wait, is whiskey the name of a windows api emulator too? | 13:06 |
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| chris_99 | does anyone know if that sensor was b&w only | 13:11 |
| chris_99 | reading the specs it doesn't mention colour | 13:11 |
| chris_99 | (TCD1304AP) | 13:11 |
| Mariu | Johnny Walker | 13:12 |
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| chris_99 | http://nanohub.org/resources/180 | 13:51 |
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| chris_99 | nmz787, was that sensor b&w only | 13:52 |
| nmz787 | oh, yeah | 13:53 |
| nmz787 | no bayer filter | 13:54 |
| nmz787 | if that's what you mean | 13:54 |
| chris_99 | yeah | 13:54 |
| chris_99 | so you'd need 3 | 13:54 |
| nmz787 | : yeah its 1D | 13:54 |
| nmz787 | a line of pixels only | 13:54 |
| chris_99 | yeah | 13:54 |
| chris_99 | for a spectrometer you'd need colour though | 13:55 |
| chris_99 | wouldn't you | 13:55 |
| nmz787 | no | 13:55 |
| nmz787 | that's what the grating does | 13:55 |
| chris_99 | i thought it split them into lines of different colours | 13:56 |
| chris_99 | for instance this, http://upload.wikimedia.org/wikipedia/commons/1/1a/Simple_spectroscope.jpg how would you process that in b&w | 14:00 |
| chris_99 | as theres two blue lines isn't there | 14:00 |
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| nmz787 | because the grating/prism does a fourier transform on the slit light | 14:02 |
| nmz787 | it sorts the freq for you | 14:02 |
| nmz787 | rather than the bayer pattern 'sorting' the light into 3 color 'bins' | 14:03 |
| chris_99 | oh so you're saying on the far left, is X Hz and on the right is X+n Hz? | 14:03 |
| nmz787 | yes | 14:05 |
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| chris_99 | cool that makes sense | 14:08 |
| nmz787 | so you just need to do a baseline, then place your sample in the light path | 14:08 |
| nmz787 | and correct the experimental with the base line | 14:09 |
| nmz787 | because even if the light is equal in terms of Watts across the spectrum, the sensor has a sensitivity curve that differs from 300-1000nm, etc | 14:09 |
| chris_99 | what do you mean by baseline? | 14:12 |
| nmz787 | light source with no sample in the light path | 14:13 |
| nmz787 | then you place the sample in the light path, and some of it will get absorbed, some might fluoresce, etc | 14:14 |
| chris_99 | ah ok, using a pure white light right? | 14:14 |
| nmz787 | well, the calibration curve will tell you what the white light is made up of | 14:14 |
| chris_99 | wouldn't it make sense to use something like a laser to align it | 14:19 |
| nmz787 | that would work yep | 14:22 |
| chris_99 | can you get IR diffraction gratings easily | 14:24 |
| chris_99 | i've just looked on fleabay but can't see any | 14:24 |
| chris_99 | hmm found one for £45.00 not esp. cheap | 14:27 |
| nmz787 | yeah | 14:30 |
| nmz787 | IR starts to get tricky though at a certain point, around the 1000nm mark | 14:31 |
| nmz787 | when it starts to make sense to use mirrors instead of lenses | 14:31 |
| nmz787 | which are all expensive | 14:31 |
| chris_99 | oh yeah i was gonna ask you, you need a lens for the CCD right? | 14:32 |
| chris_99 | to focus the light | 14:32 |
| chris_99 | i guess if the ccd has microlenses, maybe you could get away with placing the grating right on the snesor | 14:33 |
| kanzure | someone named "Data Pathway" has emailed me.. "You have me on your google analytics account with access to the stats to gnusha.org and openmanufacturing.org" | 14:35 |
| kanzure | "would you mind removing me from the account? I am turning some admin tasks over to an assistant, and those dead sites are a little extra clutter I don't want to answer questions about ;-)" | 14:35 |
| kanzure | why does james have access in the first place? | 14:35 |
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| kanzure | why is andrew hessel doing marketing for autodesk? | 14:45 |
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| kanzure | what an awful biotech startup landing page: http://emeraldtherapeutics.com/ | 14:47 |
| kanzure | don't do that, kids. | 14:47 |
| chris_99 | if only they'd made the double helix spin too | 14:47 |
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| nmz787 | this is pretty sweet for $52 http://www.elexp.com/kit_v962.htm#3in1allterrain | 14:54 |
| nmz787 | 3-in-1 All Terrain Robot | 14:54 |
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| chris_99 | haha it's got a forklift mode | 15:02 |
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| chris_99 | http://www.youtube.com/watch?v=1EWWt93Fxls&feature=g-vrec i like this use of a 3D printer @ ~3 minutes | 15:29 |
| kendoka | bryan print me a new liver | 15:35 |
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| kanzure | kendoka: ask jmil, he might be able to pull that off with his machine | 15:38 |
| kanzure | jmil: hi | 15:38 |
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| kanzure | god i hate wired http://www.wired.co.uk/news/archive/2012-09/04/diy-biohacking | 15:50 |
| kanzure | "Magnet-implanting DIY biohackers pave the way for mainstream adoption" | 15:50 |
| kanzure | that's a pretty big lie. | 15:50 |
| Mokbortolan_1 | so this "biohacking", why don't they just call it, "putting magnets into fingers" | 15:51 |
| Mokbortolan_1 | because that's all I see going on | 15:51 |
| kanzure | i don't know :( | 15:51 |
| Mokbortolan_1 | has anybody got a practical application for fingermagnets? | 15:51 |
| kanzure | "mainstream".. um. first, who the fuck cares about mainstream, and two, who cares about magnets? | 15:51 |
| Mariu | lol | 15:52 |
| kanzure | ughh ""The magnet is attractive because it's this small thing that's so simple, but gives you a new sense of the world," says Grindhouse member Lucas Dimoveo." | 15:52 |
| kanzure | that's Lukas_ when he's in here | 15:52 |
| kanzure | "One transhumanist who is most definitely considered mainstream is not particularly impressed with Cannon's dream mod, nor Grindhouse's particular brand of biohacking. "The first heart replacement was in the 60s -- this is normal!" Natasha Vita-More tells Wired.co.uk." | 15:55 |
| kanzure | natasha is not mainstream :( | 15:55 |
| kanzure | liar "Cannon says the general consensus from the transhumanist community is that the team is "stupid for dreaming". " | 15:56 |
| kanzure | these guys are assholes. | 15:56 |
| jrayhawk | Mokbortolan_1: sensing electric fields is useful for power technicians, electrical engineers, etc. | 15:56 |
| kanzure | jrayhawk: when quantified.. yes. | 15:56 |
| chris_99 | haha jrayhawk | 15:56 |
| kanzure | if you're exploring places without blueprints, i could see that really useful | 15:56 |
| jrayhawk | I've seen claims of people identifying faulty equipment. | 15:57 |
| ThomasEgi | jrayhawk, it is magnetic fields. not electric ones. it really is just a toy. fun toy for most it seems | 15:57 |
| jrayhawk | Either grounding out where it's not supposed to or utilizing waaay more power than it's supposed to. | 15:57 |
| kanzure | i think the "us vs them" mentality that grindhouse is suggesting is just really useless | 15:57 |
| chris_99 | it seems like a crap way to identify faulty equipment | 15:57 |
| jrayhawk | ThomasEgi: it's called 'electromagnetism' for a reason. | 15:57 |
| kanzure | if when they say "mainstream transhumanists" they are talking about natasha, then they are wasting their time | 15:58 |
| kanzure | if they mean me, then they are just being unnecessarily hostile | 15:58 |
| ThomasEgi | jrayhawk, still magnetic fields, not electric ones^;) | 15:58 |
| jrayhawk | electric currents generate magnetic fields. | 15:58 |
| jrayhawk | that is how electric motors work. | 15:58 |
| ThomasEgi | yeah but electric fields don't generate magnetic ones | 15:58 |
| chris_99 | electric fields? | 15:58 |
| ThomasEgi | at least not static | 15:58 |
| jrayhawk | electric fields...? | 15:59 |
| ThomasEgi | what about electric fields? | 15:59 |
| superkuh | A gradient in charge. | 15:59 |
| Mokbortolan_1 | http://www.diffen.com/difference/Electric_Field_vs_Magnetic_Field | 15:59 |
| ThomasEgi | those magnets won't allow you to feel if you hold a life wire in your hand.. only if there are 10 A going through it or not. | 15:59 |
| Mokbortolan_1 | A moving charge always has both a magnetic and an electric field, | 16:00 |
| ThomasEgi | yeah. but with those magnets you are not able to feel the electric component | 16:00 |
| superkuh | Yeah, well, it's not going to tell you if you're picking up a charged capacitor or anything. | 16:00 |
| chris_99 | yup all it'll tell you is if something is magnetic or not ThomasEgi obviously | 16:00 |
| Mokbortolan_1 | I thought you could pick up on AC | 16:00 |
| ThomasEgi | hm.. not even that | 16:00 |
| chris_99 | *attracted to a magnet | 16:00 |
| kanzure | they should stop wasting their time picking on natasha. it's not like she has any followers. | 16:00 |
| jrayhawk | Yeah, high-current AC is what I usually see mention of. | 16:01 |
| ThomasEgi | it's mostly alternating magnetic fields that you pick up | 16:01 |
| chris_99 | what people really should be doing, is attaching a hall effect sensor | 16:01 |
| chris_99 | to their neurons ;) | 16:01 |
| ThomasEgi | high ac current, motors, fans. tranforrmers.. stuff like that | 16:01 |
| ThomasEgi | chris_99, work in progress^ | 16:01 |
| chris_99 | or just make it output vibrations | 16:01 |
| jrayhawk | anyway, this "not *real* biohacking" attitude is not particularly useful | 16:01 |
| jrayhawk | it's a no true scotsman paradox | 16:02 |
| kanzure | sure | 16:02 |
| ThomasEgi | jrayhawk, let the kids have some fun. they do a great job crowdfunding projects | 16:02 |
| kanzure | to be fair, natasha doesn't work with hardware either | 16:02 |
| jrayhawk | you can claim it's not *good* biohacking, but then you have to qualify your position. | 16:02 |
| kanzure | natasha did some documentaries | 16:02 |
| kanzure | and submitted them to film festivals | 16:02 |
| kanzure | and had her 1980s talk show in los angeles | 16:02 |
| kanzure | so uh.. i mean. it's really silly to pick on her. | 16:03 |
| kanzure | except in the sense that nobody thinks that making a more beautiful film will cause hardware to come into existence | 16:04 |
| kanzure | jrayhawk: so is that still a no true scotsman argument? | 16:05 |
| kendoka | Next Topic at H+ "Magnets: How Do They Work?" | 16:07 |
| chris_99 | hehe | 16:08 |
| chris_99 | nmz787, http://myspectral.com | 16:14 |
| chris_99 | unless i'm being very dumb, the schematics aren't there though | 16:15 |
| kanzure | "spectruino" hah | 16:15 |
| kanzure | "As Creative Scientist of the team, he is working on bringing hands on education and experiments to the masses. | 16:15 |
| kanzure | i wish people would stop saying "masses" | 16:15 |
| kendoka | "all the little people" | 16:16 |
| jrayhawk | they found controversy and played it up, which isn't particularly hard in a community of idealists | 16:16 |
| kanzure | also: assay depot (+ DARPA) is repeating the biocurious competition thing at genspace | 16:16 |
| jrayhawk | if you don't want to look like an asshole, don't claim that everyone who has a vision different than yours is also an asshole | 16:16 |
| kanzure | https://www.surveymonkey.com/s/EnablingTechnologies_SyntheticBiology | 16:17 |
| kanzure | jrayhawk: so did i do something wrong that made them want to do that, or what? | 16:17 |
| kanzure | jrayhawk: how do i handle them | 16:17 |
| jrayhawk | your desire to force them to conform to your value system is what makes you an asshole. you should find productive overlap where you can and fucking let go of the rest, already. | 16:19 |
| jrayhawk | neither quantifiedself nor big-time bioresearch invalidate eachother, nor do they particularly interfere with eachother. | 16:20 |
| kanzure | i don't think i ever claimed they do | 16:20 |
| jrayhawk | they are an allegory | 16:21 |
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| jrayhawk | the key difference is that i don't think each of quantifiedself and big-time bioresearch spend much time claiming how stupid and useless the other is | 16:46 |
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| kanzure | https://github.com/jywarren/spectral-workbench | 17:47 |
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| nmz787 | yea | 17:54 |
| nmz787 | blah | 17:54 |
| nmz787 | it doesn't have any identification/fingerprinting functionality | 17:54 |
| kanzure | mac posted a link to their work again, but i never remember him posting a link to your stuff :( | 17:55 |
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| nmz787 | nope | 17:55 |
| nmz787 | they're MIT guys | 17:55 |
| nmz787 | maybe that's why? | 17:55 |
| nmz787 | or maybe because I never finished | 17:55 |
| nmz787 | ... | 17:55 |
| kanzure | dunno. mac went to mit i think, so he might be biased, but i doubt it. | 17:56 |
| nmz787 | I dont think he went to MIT, i think he worked there | 17:57 |
| kanzure | good point | 18:06 |
| kanzure | i think before igem, mac was doing drupal work | 18:06 |
| kanzure | http://openwetware.org/nerdbook/ | 18:07 |
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| nmz787 | kanzure: http://cis-action.com/about | 18:37 |
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| kanzure | hah i see, he uses jason morrison.. that makes sense. | 18:46 |
| kanzure | jason works at thoughtbot | 18:46 |
| kanzure | "I work in a splendid coworking space with a bunch of other web entreprenuers and I like my direction right now even though I don’t have a job." | 18:47 |
| kanzure | i see i see | 18:47 |
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| kanzure | yashgaroth: yo | 19:15 |
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| yashgaroth | sup | 19:17 |
| nmz787 | yo | 19:17 |
| nmz787 | see you updated linkedin | 19:18 |
| nmz787 | Senior | 19:18 |
| yashgaroth | uh huh | 19:18 |
| yashgaroth | fuck yeah | 19:18 |
| yashgaroth | makes up for 'assistant' | 19:18 |
| nmz787 | lol | 19:18 |
| kanzure | yashgaroth: you should say you're a 'senior growth hacker' | 19:18 |
| kanzure | growth hacker is the new ninja | 19:19 |
| yashgaroth | I thought gothninjas were the new ninjas | 19:19 |
| nmz787 | bbl, watching some old TV show | 19:19 |
| brownies | kanzure: o.O | 19:23 |
| brownies | kanzure: that sentence is really expert-level doublethink | 19:23 |
| brownies | "i work... in a cowrking space... with other "entrepreneurs"... i don't have a job." | 19:23 |
| kanzure | :) | 19:24 |
| yashgaroth | "I work ... even though I don't have a job." indeed | 19:25 |
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| kanzure | i think that page is old | 19:25 |
| kanzure | he tried to do snparty, where he sold snp testing kits to like 10 teachers | 19:25 |
| kanzure | and then he moved to sf to do cofactor bio, except he had like 2 customers | 19:25 |
| brownies | is that enough customers? | 19:33 |
| kanzure | no i assume this is why he's not doing either of those things now | 19:41 |
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| kanzure | blah why hasn't the FBI sent my my records yet? isn't FOIA supposed to work? | 19:57 |
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| delinquentme | jmil: on the choice of stepping for your shaker ... why 16th steps? Doesnt that generate more heat and less torque? | 20:07 |
| delinquentme | Im sure it would be smoother ... but I was thinking you could almost use another section of tubing to act as some sort of elastomer ... and run it at full stepping ... allowing for smaller motor / cheaper / less heat from active coils | 20:08 |
| delinquentme | passively active coils | 20:08 |
| jmil | delinquentme: less heat. less torque, but overpowered motors for the application so they still run cool. incubators unfortunately DON'T have cooling function, only heating function. so if the motors overheat they will kill all your cells | 20:08 |
| delinquentme | I thought that microstepping generates more heat ... as more coils are energized at a given time? | 20:09 |
| nmz787 | delinquentme: no | 20:10 |
| nmz787 | microstepping just applies a limited current | 20:10 |
| nmz787 | instead of full on off | 20:10 |
| nmz787 | following a Nth (microstepped) quantized sine wave | 20:10 |
| jmil | kanzure: wow finger magnets is so freaking stupid. kendoka we are working on your liver. give it 30 more years. should be by then. | 20:10 |
| kanzure | nmz787: did you run into carl? i forget what your plans are | 20:11 |
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| jmil | 'course i been wrong before | 20:11 |
| nmz787 | no | 20:11 |
| jmil | :D | 20:11 |
| nmz787 | i had to come back to nyc | 20:11 |
| kanzure | jmil: i think he could probably find a donor before 30 years :) | 20:11 |
| delinquentme | yeahh i was up in PGH all weekend :D | 20:11 |
| delinquentme | kk looks like i needs more stepper research | 20:12 |
| delinquentme | afk! | 20:12 |
| kanzure | brownies: this one has a pretty image maybe that means it works http://code.google.com/p/starloot/ | 20:14 |
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| brownies | kanzure: GPL! eww | 20:16 |
| kanzure | an interesting ld48 entry: http://www.ludumdare.com/compo/2012/04/24/post-mortem-work-on-immune-system-game/ | 20:23 |
| kanzure | based on immune system stuff | 20:23 |
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| nmz787 | this doesnt necessarily sound like a bad thing http://www.in-pharmatechnologist.com/Ingredients/Chinese-drugmaker-accused-of-using-cooking-oil-in-antibiotic-production/?utm_source=newsletter_daily&utm_medium=email&utm_campaign=Newsletter%2BDaily&c=fTyEGch4gwMa8y%2FPG5ntqQ%3D%3D&utm_source=BNT+September+4%2C+2012&utm_campaign=BNT090412&utm_medium=email | 20:47 |
| nmz787 | "The clampdown was prompted by the discovery of chromium-tainted gelatin derived from the leather industry rather than pharmaceutical grade gelatin had been used to produce gel capsules" | 20:49 |
| nmz787 | that that sounds worse | 20:50 |
| tashoutang | kanzure can you tell me about the 益智藥 where can I get it? | 20:50 |
| kanzure | hmm | 20:53 |
| kanzure | tashoutang: http://www.longecity.org/forum/topic/36691-ten-months-of-research-condensed-a-total-newbies-guide-to-nootropics/ | 20:53 |
| kanzure | haha now that i'm re-reading that, it is funny: "When I take practice tests most days I have nearly perfect recall and my only mistakes are analysis." uhhhh | 20:54 |
| kanzure | that's the most important part! hah. | 20:54 |
| yashgaroth | at least he can remember the excuse easily | 20:55 |
| foucist | what he means is that the only source of errors on his exam is gonna be the part that doesn't depend on his perfect memroy | 20:56 |
| foucist | memory* | 20:56 |
| kanzure | yes i know | 20:56 |
| kanzure | i think the idea is to make no mistakes :) | 20:56 |
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