| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| mathew | "There is no clear way to conclusively prove PM came from a facility, but there are several inferences that can be drawn. Saturation Monitoring ma..." | Read more » | almost 7 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 | "@bkeist do you want to try troubleshooting it live? could you join next Tuesday's open call? its from 2-3 Central time. " | Read more » | about 7 years ago | |||
| mathew | "@marlokeno pointed me to the US Dept. of Labor's Mine Data Retrieval System which indicates that Great Northern is currently abandoned. This is an..." | Read more » | about 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 | "I know nothing about these models, but thought I'd add some links for reference AEROMOD: https://www3.epa.gov/scram001/dispersion_prefrec.htm#aerm..." | 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 | "sure, its here: https://publiclab.org/wiki/visual-pm monitoring options are given an overview on this page, to put it in some context: https://pub..." | 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 | "Minnesota DEP maps: " | 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 | "Wisconsin watch railway map: " | 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 |