| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| mathew | "the paper is a great substrate! cool exercise. " | Read more » | almost 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 » | about 6 years ago | |||
| mathew | "I've been in touch with Airmetrics over the issue. they're been very helpful and responsive. (see below) " | Read more » | about 7 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 » | about 7 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 » | about 7 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 » | 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 | "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 » | 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 | "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 | "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 | "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 » | almost 8 years ago | |||
| mathew | "Minnesota DEP maps: " | Read more » | almost 8 years ago | |||
| mathew | "You can get the analysis spreadsheet here: https://docs.google.com/spreadsheets/d/1xSVT9lxary0zZhhEqhrX3hsdIb4shbYhaOJx_RWhESg/edit#gid=0 " | Read more » | almost 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 » | almost 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 | "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 | "excellent suggestion, thanks for pulling that up! On a brief review, it confirms our experience that PM10 is probably the smallest size we can rel..." | Read more » | over 8 years ago | |||
| mathew | "8.5"x11" PDF of this page for printing: _Deploying_Passive_Particle_Monitors-full.pdf PDF made from the Wiki according to these instructions. " | 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 |