| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| mathew | "the paper is a great substrate! cool exercise. " | Read more » | over 6 years ago | |||
| mathew | "@Matej the most up-to-date information and production files are in the Github repository: https://github.com/publiclab/passive-pm The screen and m..." | Read more » | over 6 years ago | |||
| 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 » | over 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 » | over 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 » | over 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 » | almost 8 years ago | |||
| mathew | "Looks great! i noticed two formatting issues. There seems to be a missing research note in the section: If you are unsure of whether or not this ..." | Read more » | almost 8 years ago | |||
| mathew | "I've been in touch with Airmetrics over the issue. they're been very helpful and responsive. (see below) " | Read more » | almost 8 years ago | |||
| mathew | "Airmetrics got to scratching their heads over this difference as well! It turns out there is an additional variable that isn't listed in the manua..." | Read more » | almost 8 years ago | |||
| mathew | "I contacted some folks at Airmetrics, and their initial reaction was that I appeared to be doing it correctly (but they didn't really dig in). The ..." | Read more » | almost 8 years ago | |||
| mathew | "@gretchengehrke 1) yes, P and T are pressure and temp. There's Pstd and Pact (P standard and P actual) same for temperature. Those are the tempera..." | Read more » | almost 8 years ago | |||
| mathew | "There is a large folder of sample image sets avaialble. I put a smaller set together here: https://publiclab.org/notes/mathew/10-07-2016/sizing-ima..." | Read more » | almost 8 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 » | almost 8 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 » | almost 8 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 » | about 8 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 » | about 8 years ago | |||
| mathew | "@plundh I'm not sure about this kit, but the OpenFlexure Microscope is moving towards a kit. More notes here: https://publiclab.org/tag/microscope ..." | Read more » | over 8 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 » | over 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 » | over 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 » | over 8 years ago | |||
| mathew | "Although we are hopeful that Simon's strategies listed here can get us to a particle count, If they aren't sufficient Rongjun Qin recommended we lo..." | Read more » | over 8 years ago | |||
| mathew | "You can get the analysis spreadsheet here: https://docs.google.com/spreadsheets/d/1xSVT9lxary0zZhhEqhrX3hsdIb4shbYhaOJx_RWhESg/edit#gid=0 " | Read more » | over 8 years ago | |||
| mathew | "That's a great writeup! thanks Simon. If anyone needs an image set to play with, please e-mail me, and I can share the files. They're too large t..." | Read more » | over 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 » | over 8 years ago |