| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| liz | "How's this project going? Would love to hear an update! " | Read more » | almost 9 years ago | |||
| marlokeno | "Markdowm Sorry about that. By the way, the subtitle of the article is The hardest DIY project ever. http://www.popsci.com/diy/article/2011-07/you-b..." | Read more » | over 9 years ago | |||
| mathew | "@marlokeno do you have the link to the DIY SEM? I don't see it in your note. I would love to re-use an old CRT electron gun, but I agree with you..." | Read more » | over 9 years ago | |||
| marlokeno | "What if, in constructing some algorithm to count silica particles, you used a GIMP or photoeditor threshhold editor on the image? The silica would ..." | Read more » | over 9 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 » | over 9 years ago | |||
| amysoyka | "http://home.hiroshima-u.ac.jp/er/EV_EI_A(2)_07.html ...If you scroll down in the page linked above, it tells you the different refractive indexes ..." | Read more » | over 9 years ago | |||
| warren | "Ooh, great idea mathew! " | Read more » | over 9 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 » | over 9 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 » | over 9 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 » | over 9 years ago | |||
| mathew | "I'm wondering if two off-the-shelf Shinyei sensors could be coupled together with an electromagnet to make this work: http://publiclab.org/notes/do..." | Read more » | over 9 years ago | |||
| el_tonio | "My initial thought was an electromagnet might be best. Reading the journal though, they use two small neodymium magnets. The major issue with rough..." | Read more » | almost 10 years ago | |||
| amysoyka | "@el_tonio Your image has me thinking it might be worth using a piece of metal piping & turning it into an electromagnet. Also, found this art..." | Read more » | almost 10 years ago | |||
| el_tonio | "Further questions that need exploring: Following some literature * What does the data look like * What is a positive result? * What is a negative ..." | Read more » | almost 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 » | almost 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 » | almost 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 » | almost 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 » | almost 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 » | almost 10 years ago |