| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| warren | "As to time-averaging, I think it'd be pretty easy to implement, but would ONLY work if a spectrum is really vertically aligned -- so no uploaded sp..." | Read more » | about 7 years ago | |||
| warren | "Hi, Dave - try reloading the page - i briefly edited the spectrum while chasing a bug, so you may have seen it in the wrong state -- tell me what y..." | Read more » | about 7 years ago | |||
| warren | "Hi, Chris - because we used lots of peaks to determine "fitness", we'd need all of the following nanometer positions plus their intensity (0-255): ..." | Read more » | about 7 years ago | |||
| warren | "Note: If this looks good, I can package it up as a "noise reduction" tool in its own right -- the Transform operation may enable us to quickly crea..." | Read more » | about 7 years ago | |||
| warren | "Well, both images were taken from the same device within about 20 minutes, so you can check their images against one another even if they're not ac..." | Read more » | about 7 years ago | |||
| warren | "I added an update about suitability of long-tube fluorescent bulbs (non CFLs) for calibration which should be interesting to @liz and maybe @cfasti..." | Read more » | about 7 years ago | |||
| warren | "@DarkGreen - there's now a new calibration tool -- read about it here: https://publiclab.org/notes/warren/09-30-2015/new-wavelength-calibration-pro..." | Read more » | over 7 years ago | |||
| warren | "@chongyukwai - can you link to the water spectrum you're talking about? " | Read more » | over 7 years ago | |||
| warren | "That's a great spectrum! I didn't know ruby fluoresced. Was that with a 405nm laser? Do you mean amplifying the peaks, so they're "taller"? I beli..." | Read more » | over 7 years ago | |||
| warren | "Hmm. So I'm wondering if part of the fit problem is because we're simply comparing intensity at the 14 points and 13 troughs. Take this example: ..." | Read more » | over 7 years ago | |||
| warren | "Cool, thanks! I was mainly looking for a citation for the most common forms of Hg, and/or a clear reference for which is found in CFL bulbs. But aw..." | Read more » | over 7 years ago | |||
| warren | "I'm going to revise: 211px and 742px, out of a total of 1390px. " | Read more » | over 7 years ago | |||
| warren | "Oops, meant to share links to my tests -- here's the one I used the new calibration system on, and listed 3 approximate errors for: https://spectra..." | Read more » | over 7 years ago | |||
| warren | "Hmm. I guess there are pros and cons to each approach. I agree that the 546 line doesn't result in a great linear calibration -- some end up about..." | Read more » | over 7 years ago | |||
| warren | "OK - I'm adapting the calibration slider to use the photoshop-corrected version of the Snow Sky spectrum. I read the blue 436 peak at 210px from l..." | Read more » | over 7 years ago | |||
| warren | "Would you be willing to try a recalibration using the 436/546 lines as a starting point? Would that be useful as a point of comparison? Also - I b..." | Read more » | over 7 years ago | |||
| warren | "If it's helpful, we can probably ask some of the OTK beta participants for one, since a couple have access to lab spectrometers. In your image/ima..." | Read more » | over 7 years ago | |||
| warren | "Oh, cool -- can you link us to your dissertation, as a source? I'm hoping this note can be a sort of bibliography for the calibration code decision..." | Read more » | over 7 years ago | |||
| warren | "Thanks, Gwill -- good resource. Chris, I wanted to get some more clarity from @gretchengehrke on the mercury oxidation states in the comments of m..." | Read more » | over 7 years ago | |||
| warren | "Hmm, is there a reason Hg (0) is not listed in the NIST spectra? Perhaps Hg (0) does not have any intense peaks? My list is filtered for most inten..." | Read more » | over 7 years ago | |||
| warren | "Don't we have an ocean optics spectrum to source from too? I don't remember if we took a cfl spectrum with it, but we could maybe ask Mary to take ..." | Read more » | over 7 years ago | |||
| warren | "I see that the 14 peaks you've chosen are sourced from the NIST data, not the Wikipedia/Ocean Optics data. OK, one last issue -- for intensities o..." | Read more » | over 7 years ago | |||
| warren | "Also, I'm not clear what Hg II means -- an ion? Would we only be seeing Hg I, or would we see both? I'm wondering about the Hg I line at 546.0750nm..." | Read more » | over 7 years ago | |||
| warren | "OK, I've filtered out the highest NIST peaks, and exported them in plain text. But these are in a vacuum, and for example, the 436.6nm line in the ..." | Read more » | over 7 years ago |