| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| 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 » | about 10 years ago | |||
| mathew | "that reminds me-- I have one of the DIY Bio microscopes i built this summer-- haven't used it for anything-- I'll take a look again. " | Read more » | about 10 years ago | |||
| mathew | "I bought a scanner earlier that claimed 9200 DPI, but I could only get at best 1700DPI out of it. it seems the best effective resolution of a slide..." | Read more » | about 10 years ago | |||
| mathew | "Thanks! @amysoyka that's an interesting idea. I haven't ever studied mines specifically, just basic geology. You're right though-- the issues of ..." | Read more » | about 10 years ago | |||
| mathew | "thanks for sharing, Nick! I didn't want to give away your secret. We're looking at several situations (like particles, H2S) where controlled airfl..." | Read more » | over 10 years ago | |||
| mathew | "That's pretty neat. How airflow will be controlled, as I would expect a moving vehicle to increase particulate measurements as a matter of the airf..." | Read more » | over 10 years ago | |||
| mathew | " Usually gravimetric tests are done on particles after they have been captured in the field. Given environmental vibrations, it sounds tough to pi..." | Read more » | over 10 years ago | |||
| mathew | "Thank you so much for the clarification David! I'll work that into our summaries. its been hard to get a handle on exactly what is meant by that s..." | Read more » | over 10 years ago | |||
| mathew | "yeah, l their comments are moderated. mine is still in the queue. " | Read more » | over 10 years ago | |||
| mathew | "I've been operating on the assumption that the EPA/ISO standard = PM2.5. I guess this is an etymology question. which came first: PM2.5 or the EP..." | Read more » | over 10 years ago | |||
| mathew | "maintenance is an issue-- look at these dylos monitors in China building up particulates http://aqicn.org/faq/2013-10-21/dylos-air-particule-conter..." | Read more » | over 10 years ago | |||
| mathew | "I just posted a comment to that article. thanks for pointing it out: @donblair-- the author doesn't seem to understand the terminology in use. Th..." | Read more » | over 10 years ago | |||
| mathew | "@donblair-- the author doesn't seem to understand the terminology in use. The conclusions are based on a misunderstanding of what PM2.5 actually m..." | Read more » | over 10 years ago | |||
| mathew | "The Speck team indicates that airflow is a big issue. they're controlling with a fan. If I move the Speck around just a little bit the values cha..." | Read more » | over 10 years ago | |||
| mathew | "you can always try Fluxtream, although I don't know how you get the data in there on windows. actually I do-- make Don do it! " | Read more » | over 10 years ago | |||
| mathew | "do you want me to make an .xls file from the .odf file? i'm not sure the date translation will work, but the dates are int he odf I made. " | Read more » | over 10 years ago | |||
| mathew | "Thanks to Bea at CMU CREATELab for the blog cross-post ! My followup post on moving Speck data into Fluxtream to visualize data. " | Read more » | over 10 years ago | |||
| mathew | "I found a scanner, the Canon 9000F and 9000F MKII, with an optical resolution of 9600dpi and an interpolated resolution of 19200dpi, or pixels 2.6μ..." | Read more » | over 10 years ago | |||
| mathew | "Ok. Updated. the situation is better than I thought. A 4800dpi scanner could definitely give straight PM10 measurements, possibly with identifica..." | Read more » | over 10 years ago | |||
| mathew | "Ok-- apparently my math is all wrong. I thought DPI was dots per square inch. this is completely wrong. it is dots that can be placed in a line o..." | Read more » | over 10 years ago | |||
| mathew | "@eustatic in a bit, lets get something working first ;-) @warren A smartphone would definitely work for identifying silica! its just a matter of m..." | Read more » | over 10 years ago | |||
| mathew | "In my silica wiki page, I mentioned polarized light microscopy as a detection method, and yes, I'm looking into it. What you see here is polarized..." | Read more » | over 10 years ago | |||
| mathew | "I got some big (4"x8") sheets from american science and surplus. I was going to see what happens when I put some silica dust down on a flatbed wit..." | Read more » | over 10 years ago | |||
| mathew | "Thanks for finding this, Willie! really cool. " | Read more » | over 10 years ago |