| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| mathew | "I'd look at the NIOSH/OSHA work on fracking site safety. They're seeing elevated particulate levels and lots of exposure to H2S, volatile organics..." | Read more » | over 10 years ago | |||
| mathew | " gradient_print.pdf @stoft just got these back. The silver nitrate emulsion is line-screened at 300dpi, and goes from 100% black to 100% clear..." | Read more » | over 10 years ago | |||
| mathew | "cool! a lot of those images and info are on the wikipedia page too https://en.wikipedia.org/wiki/Pigeon_photography " | Read more » | over 10 years ago | |||
| mathew | "@stoft I just sent off a group of fades on acetate to the photo printer we use for our slits. We'll try it out soon. " | Read more » | over 10 years ago | |||
| mathew | "@stevie running three samples and averaging them is a great idea. You can see in the labels that I started running 3-5 tests per sample to go for ..." | Read more » | over 10 years ago | |||
| mathew | "@stoft Dave, we're getting similar brightnesses between our readings of different oils by varying the concentration and/or light path, which seem t..." | Read more » | over 10 years ago | |||
| mathew | " " | Read more » | over 10 years ago | |||
| mathew | "this camera has these rounded diesel and oil curves. ND crude is decidedly greener than diesel in these spectra. https://spectralworkbench.org/set..." | Read more » | over 10 years ago | |||
| mathew | "ok, trying to see if I can get good results from the Sanm camera, since all these spectra are from the discontinued Syba camera.... nope. the Sanm ..." | Read more » | over 10 years ago | |||
| mathew | "nice! " | Read more » | over 10 years ago | |||
| mathew | "Gel caps fluoresce and we can't use them. And styrene is dissolved by oils. and we can't use it either. " | Read more » | over 10 years ago | |||
| mathew | "Ok- so styrene cuvettes are dissolved by diesel fuel and several other oils. In the photo below you can see the bottom dissolving into a sticky mes..." | Read more » | over 10 years ago | |||
| mathew | "changing the capacitance is really easy to explain to people. every transition from a peak to trough of the wave form is queued in by the filling ..." | Read more » | over 10 years ago | |||
| mathew | "yes. we should. It isn't directly evident why we would use audio, given that it is so incredibly data-intensive. We have to make that argument RE:..." | Read more » | over 10 years ago | |||
| mathew | "Your diligence in solving this calibration problem in the most user-friendly way that ALSO involves simplifying the electronics AND the signal out..." | Read more » | over 10 years ago | |||
| mathew | "this is super excellent. does this mean that people can assemble DIY probes with slightly different relationships that we can now tune to standard..." | Read more » | over 10 years ago | |||
| mathew | "I'm trying to imagine how to calibrate the CO2 sensor-- Do you think we could fill up a series standard-sized balloons of some sort with a known ai..." | Read more » | over 10 years ago | |||
| mathew | "balloon diameter is a good method-- the balloon is pretty spherical. @jbreen marks the wall with measurements before inflating. " | Read more » | over 10 years ago | |||
| mathew | "lets see if we can source some of these and do force tests on them. We just switched out the swivels for better ones, I'm into continuously improv..." | Read more » | over 10 years ago | |||
| mathew | "I'm fully in support of distributing proto-boarded Coqui's over circuit boards, mainly because we may need to add parts/change the resistor and cap..." | Read more » | over 10 years ago | |||
| mathew | "Upverter is nice, Eagle is just as user-friendly as a CAD software from the 80's is expected to be... We should find someone to give us all a KiCAD..." | Read more » | over 10 years ago | |||
| mathew | "I wish we didn't have the fluorescence issues, the gelcaps do allow the capture of a brighter fluorescence than the cuvette holders; the chlorophyl..." | Read more » | over 10 years ago | |||
| mathew | "whelp. forget gelcaps. The article I posted here is right- gelatin fluoresces. the whole blue-green section of this spectra was the cap itself. " | Read more » | over 10 years ago | |||
| mathew | "poop. the caps fluoresce. " | Read more » | over 10 years ago |