| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| marlokeno | ""Markdown" I'm wondering if silica can be separated from other micro or nano-particulates by dissolving all particles in a solution or series of so..." | Read more » | about 10 years ago | |||
| amysoyka | "I was planning in using a webcam + the lenses from an old CD/DVD drive. (Yes, I like my old CD/DVD drives. ;) ) " | Read more » | about 10 years ago | |||
| marlokeno | "Markdown stray related concern: I remember reading-sorry I can't remember the source-that some pharmaceutical companies were attaching the pharma m..." | Read more » | about 10 years ago | |||
| mathew | "That candle protector is a great way to picture how this sensor works! I think the tiny grate on top of the sensor itself does something similar. ..." | Read more » | about 10 years ago | |||
| 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 | |||
| marlokeno | "Markdown In order to measure particles in sand mine areas of W. Wisconsin/ SE Minn., I noticed from a google/NASA map today that average wind spee..." | Read more » | about 10 years ago | |||
| marlokeno | "2 I am concerned about sub 2.5 micron particles of silica, particles the size of nanoparticles or close to it. Here's a reference to nanotech expo..." | Read more » | about 10 years ago | |||
| marlokeno | "Great work, Matthew, and great job leading dusthack in Menomonie. I'm concerned that the chair of the geology dept. at UW-Eau Claire is claiming t..." | 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 | |||
| warren | "Would one of these hacked-webcam microscopes by http://hackteria.org and http://diybio.org be good enough magnification? http://hackteria.org/work..." | 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 | |||
| amysoyka | "@btbonval It was good advice, so thanks. This would work for identifying clumped asbestos fibers for sure! The thing that I really want to home ..." | Read more » | about 10 years ago | |||
| btbonval | "I just realized the images shown in the research note are thumbnails. The threshold enhancement helped the thumbnails a lot. Looking at the actual..." | Read more » | about 10 years ago | |||
| btbonval | "@amysoyka Yeah, that's pretty much what I meant. It worked way better than I would have thought. You can see wrinkles and bubbles in the tape! Inv..." | Read more » | about 10 years ago | |||
| amysoyka | "@btbonval Did you mean like this? I used Paint.net > Adjustments > Levels and made it so that the Input histogram was between 255-240. (..." | Read more » | about 10 years ago | |||
| btbonval | "The inverse helps make particles stand out. Another filter you might try is a threshold. If you're using GIMP (free and open source software for im..." | 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 | |||
| liz | "Amazing presentation @Mathew ! I learned so much. The graphics and maps are great too. " | Read more » | about 10 years ago | |||
| amysoyka | "Great talk. You've done a great job at making this video informative - so U awarded you a watchdog barn star Anyhow, cutting to the chase. The iss..." | Read more » | about 10 years ago | |||
| amysoyka | "Hey Matt, We just had an asbestos scare in my neighbourhood - so I wanted to make some cheap and simple collectors that can be hung up by resident..." | Read more » | about 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 | |||
| amysoyka | "This is a gravimetric sensor: In theory, don't PM particles have different weight, depending on atomic content. If you were to use a mesh to re..." | Read more » | over 10 years ago | |||
| jefffalk | "Thanks for the info on the DUSTTRAK. It's good to remember everything comes with advantages and disadvantages. Adjusting for or eliminating humidit..." | Read more » | over 10 years ago | |||
| DavidMack | "@jefffalk TSI explains the instrument and its calibration in documents on its web site: http://www.tsi.com/DUSTTRAK-Aerosol-Monitor-8520/ see "th..." | Read more » | over 10 years ago |