| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| mathew | "the paper is a great substrate! cool exercise. " | Read more » | almost 6 years ago | |||
| mathew | "You're right I had a typo-- I should have deleted the PM2.5 field. fixed, thanks. The mine was operational, and they were not loading rail cars, b..." | Read more » | almost 7 years ago | |||
| mathew | "Absolutely, I should have mentioned them. Here are two: $26 Ambient Weather WM-35 (discontinued, new model is WM-2), has no recording functions ..." | Read more » | almost 7 years ago | |||
| mathew | "That is an interesting question. I think the laser would get rid of chromatic aberration-- its a single frequency of light-- but I'm not sure that..." | Read more » | over 7 years ago | |||
| mathew | "You can see more about the shape descriptors for each particle here: https://publiclab.org/notes/mathew/09-19-2015/using-imagej-to-process-passive-..." | Read more » | over 7 years ago | |||
| mathew | "The image analysis creates: perimeter of each particle area of each particle circularity of each particle Circularity is the ratio between the..." | Read more » | over 7 years ago | |||
| mathew | "thanks! I've had some trouble getting the illumination aligned with the very tall illumination arm I made. Its complicated as well by the cable of..." | Read more » | over 7 years ago | |||
| mathew | "Flatfield and scale images: " | Read more » | over 7 years ago | |||
| mathew | "Here are some image sets including a flat field calibration and scale from the PSL imaging. 20160923_PSL_Sphere_SET.zip " | Read more » | over 7 years ago | |||
| mathew | "Here are some image sets including a flat field calibration and scale from the PSL imaging. 20160923_PSL_Sphere_SET.zip " | Read more » | over 7 years ago | |||
| mathew | "a note to myself: I found this article on calibrating microscopes useful background. http://www.agarscientific.com/media/import/Calibration-of-Micr..." | Read more » | almost 8 years ago | |||
| mathew | "thanks Richard! I'll try the new files soon. I'm excited to contribute some mounting files to the project and a carrying case. Will get on those in..." | Read more » | almost 8 years ago | |||
| mathew | "Followup on automating this process https://publiclab.org/notes/SimonPyle/05-13-2016/automating-imagej-for-particle-image-analysis " | Read more » | almost 8 years ago | |||
| mathew | "oh yes! please read our wiki on frac sand and PM, its getting pretty fleshed out: https://publiclab.org/wiki/frac-sand follow notes as they happen..." | Read more » | almost 8 years ago | |||
| mathew | "I found this great tutorial on automating ImageJ scripting and batch processing. It got me up and batch processing in short order: Arjun Mehta, UC..." | Read more » | about 8 years ago | |||
| mathew | "Also see @Damarquis's note on using MaxEntropy https://publiclab.org/notes/Damarquis/10-20-2015/using-imagej-to-analyze-threshold-and-saving-result..." | Read more » | about 8 years ago | |||
| mathew | "I'm writing up an introduction to particles in the air right now (rough draft), and one of the questions I wanted to answer was about naked eye obs..." | Read more » | about 8 years ago | |||
| mathew | "I'm working on creating a spreadsheet out of these equations. @Marlokeno it looks like I'm going to use Sutherland's gas law along with average te..." | Read more » | over 8 years ago | |||
| mathew | "@Damarquis has notes on using ImageJ in windows and on thresholding: http://publiclab.org/notes/Damarquis/10-20-2015/using-imagej-to-analyze-thresh..." | Read more » | over 8 years ago | |||
| mathew | "further followup on analysis of samples. " | Read more » | over 8 years ago | |||
| mathew | "read my follow-up on imaging the samples " | Read more » | over 8 years ago | |||
| mathew | "@marlokeno do you have the link to the DIY SEM? I don't see it in your note. I would love to re-use an old CRT electron gun, but I agree with you..." | Read more » | over 9 years ago | |||
| mathew | "That candle protector is a great way to picture how this sensor works! I think the tiny grate on top of the sensor itself does something similar. ..." | Read more » | over 9 years ago | |||
| mathew | "I'm pretty worried about those particles too. I think we would need an electron microscope to measure them though-- that's a pretty big barrier to..." | Read more » | over 9 years ago |