| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| marlokeno | "@mathew- As a follower of this discussion, asking couple questions- First, does electric charge of the particles play a role in dust collection? T..." | Read more » | over 8 years ago | |||
| mathew | "Thanks for sharing that, Nicholas. I've started keeping a list of sensor evaluations on the wiki page for optical pm monitors: https://publiclab.o..." | Read more » | over 8 years ago | |||
| nicholas | "I came across this article about testing the ShinyeiPPD42 in a laboratory environment. I think their evaluation is very insightful and encouraging..." | Read more » | over 8 years ago | |||
| philrosenberg | "I work with scientific dust monitors and have written and published calibration protocols for them. I have been intrigued by these low cost sensors..." | Read more » | over 8 years ago | |||
| mathew | "I want to note that while Open Pipe Kit development continues, running this comparison has been a low priority since AQICN is running effectively t..." | Read more » | almost 9 years ago | |||
| nicholas | "This is an amazing and incredibly useful page! Thanks all! Though there is one thing I'm confused about. I've been working with the Shinyei PPD4..." | Read more » | almost 9 years ago | |||
| eustatic | "What EPA Regions are the previous 4 examples of citizen enforcement? EPA's attention is a limited resource, and EPA's attention in region 6 is hea..." | Read more » | almost 9 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 » | almost 9 years ago | |||
| jeffalk | "kevinvivergy's referred to website is a great example of technology in the hands of techies. They need to learn that more data doesn't always tra..." | Read more » | about 9 years ago | |||
| kevinvivergy | "@warren @mathew thought this group might enjoy the ongoing testing of another set of low cost PM sensors going on in China! Co-located with the off..." | Read more » | about 9 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 » | about 9 years ago | |||
| marlokeno | "It is possible the wikipedia article on Reynolds numbers might help- https://en.wikipedia.org/wiki/Reynolds_number At any rate, the article does g..." | Read more » | about 9 years ago | |||
| warren | "Or try to get them all on the same graph? " | Read more » | about 9 years ago | |||
| warren | "I pasted Grapherate live graphs for 4 sensors Mathew set up into this page: http://publiclab.org/wiki/open-air -- not sure if these are those used ..." | Read more » | about 9 years ago | |||
| marlokeno | "There is an article in "Aeolian Research", Dec. 2014, entitled "The size distribution of desert dust aerosols and its impact on the Earth system." ..." | Read more » | about 9 years ago | |||
| jeffalk | "You probably know about the EPA site with monitoring data around the Chicago coke facilities. The EPA data could be used to compare to whatever dat..." | Read more » | about 9 years ago | |||
| liz | "This is incredible work!!!! You guys are awesome! " | Read more » | about 9 years ago | |||
| jeffalk | "It's my understanding that the Dylos is the only monitor of those mentioned that is calibrated by its manufacturer. That implies that some comparis..." | Read more » | about 9 years ago | |||
| nshapiro | "@mathew yes. yes yes yes yes. " | Read more » | over 9 years ago | |||
| nshapiro | "these are stunning @mathew! " | Read more » | over 9 years ago | |||
| danbeavers | "@Mathew I like! " | Read more » | over 9 years ago | |||
| mathew | "studio shots " | Read more » | over 9 years ago | |||
| mathew | "Here are some beauty shots of the next version in black. nothing much has changed except the locations of the buttons and inlets to accommodate a ..." | Read more » | over 9 years ago | |||
| H3nkt | "Hello @mathew, First of al thank you for writing. If you increase the flow pulses will be schorter. But the amplitude of the pulse should be the ..." | Read more » | over 9 years ago |