| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| Dave-O | "You're welcome, @nshapiro ! Is this the same EPA approved method that you used? https://www3.epa.gov/ttnamti1/files/ambient/airtox/to-11ar.pdf And ..." | Read more » | almost 8 years ago | |||
| nshapiro | "Thanks, @Dave-O ! We did some side by side testing of this method next to an EPA approved method and we found these tubes to be cross contaminated ..." | Read more » | almost 8 years ago | |||
| mathew | "oh yes! please read our wiki on frac sand and PM, its getting pretty fleshed out: https://publiclab.org/wiki/frac-sand follow notes as they happen..." | Read more » | over 8 years ago | |||
| sara | "Super excited to read about this project, are their more recent notes on how your project's progressing? " | Read more » | over 8 years ago | |||
| stoft | "Actually, you need several additional pieces for SWB: 1) average 3-5 parallel lines, 2) monitor stability and take data until it IS stable or times..." | Read more » | over 8 years ago | |||
| stoft | "Ideally, the user would select a "stable" ('smooth' or 'broad peak') region to monitor and then the software would take samples (and average) while..." | Read more » | over 8 years ago | |||
| warren | "Excellent; so we'll think about timeframe plus # of samples. I think we could prompt people in the interface to "ensure stable reading" during a fe..." | Read more » | over 8 years ago | |||
| stoft | "Yes, I'd agree that time averaging would help and, if possible, it sould be the default to reduce this noise component. I do not have 30 fps data, ..." | Read more » | over 8 years ago | |||
| warren | "Great analysis. Based on this, I wonder if we should more strongly encourage people to do live capturing, and to have a time averaging default sett..." | Read more » | over 8 years ago | |||
| viechdokter | "Sounds like I will have an "illuminating evening" tonight (as long as no model girls come along and tear my clothes off...). I don't have a Solux l..." | Read more » | over 8 years ago | |||
| warren | "This is great. I have been hoping someone would do a study of stability -- I'm curious, is there a discernable trend over time, as I've seen change..." | Read more » | over 8 years ago | |||
| viechdokter | "Look further down at about 420 nm. The fun starts there. " | Read more » | over 8 years ago | |||
| dhaffnersr | "Hey, I noticed when I downloaded your csv file, the wavelength numbers are here but the RGB channel numbers are all zero's? did you do a calibrati..." | Read more » | over 8 years ago | |||
| dhaffnersr | "Ok, then its the same camera that is in mine, very cool! Yes, stoft is correct on the stability issue, I followed his lead on that and took a lot o..." | Read more » | over 8 years ago | |||
| viechdokter | "No, the cellphone I only use for the nice flower pix... ;-) For the spectra I use the Desktop Spectrometry Kit v3.0 with the JDEPC-OV04 webcam. " | Read more » | over 8 years ago | |||
| dhaffnersr | "I think you may be right about the camera's auto gain control, your using a cellphone right? " | Read more » | over 8 years ago | |||
| kensanfran | "Hello, Sorry just noticed this post. I've been collecting my links and references on this DIY gas sensor calibration page of my wiki. I'm also tin..." | Read more » | over 8 years ago | |||
| jeffh | "The variation in wavelength you're seeing probably is normal variation in the manufacturing process for LEDs. Their wavelength depends on the parti..." | Read more » | over 8 years ago | |||
| dhaffnersr | "Hey Jeff! No problem at all, I am retired (a lot of time but no were to go!) All the LEDs are numbered so it's just a matter of setting the experim..." | Read more » | over 8 years ago | |||
| warren | "Dave - I have to ask - would it be a lot of work to do the same set of 9, but with a fluorescing sample in there as well? I'd love to see how much ..." | Read more » | over 8 years ago | |||
| dhaffnersr | "Hey Guillaume851, yeah, I have been using spekwin32 for several months now and once you start getting the hang of it it is easy to use and very eff..." | Read more » | over 8 years ago | |||
| dhaffnersr | "Hey Jeff! Yes they were all from the same company (superbrightled.com) here is the part number - # RL5-UV0430-400. Originally I bought 10 LEDs but ..." | Read more » | over 8 years ago | |||
| Guillaume851 | "Thanks for your posting. I was particularly surprised when I looked at Spekwin32 on the internet. I found that it was freeware for individuals like..." | Read more » | over 8 years ago | |||
| warren | "Hi Dave - I love this post. There are lots of simple, rigorous tests that can be done to test an assumption -- such as the assumption that all 400n..." | Read more » | over 8 years ago |