| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| stoft | "@viechdokter:, thanks; just a lot of years of practice. Not to worry, your's are logical and thoughtfully organized. Jeff, thanks. Yes, new observ..." | Read more » | about 8 years ago | |||
| stoft | "Jeff, I have doubts about "current bleeding" between the quantum wells as they are isolated from each other with silicon and the conversion to data..." | Read more » | about 8 years ago | |||
| stoft | "Interesting observations. My guess is that IF the camera's sensor responded in a purely linear fashion, the over exposure would be white as you'd e..." | Read more » | about 8 years ago | |||
| stoft | "I've not questioned Dr. O'Haver's work, his qualifications or the tools he has developed; it is the just lack of information in your note to explai..." | Read more » | about 8 years ago | |||
| stoft | "Unfortunately, I'm unable to extract any meaningful observations from this collection of numbers and plots and I suspect other readers will be conf..." | Read more » | about 8 years ago | |||
| stoft | "Mathew, thanks. It's an interesting technique, though not without some added work to characterize a diffusion surface and assure bulb stability. I ..." | Read more » | about 8 years ago | |||
| stoft | "Gwill, thanks. I'll take a look. Dave, It appears you are looking to observe the effect of methylene blue on the 405nm carrier. If so, I'd suggest..." | Read more » | about 8 years ago | |||
| stoft | "Here's the link: http://store.publiclab.org/collections/spectrometry/products/cuvettes-qty-10-or-100 " | Read more » | about 8 years ago | |||
| stoft | "Ok, your comments help. On the cuvettes and laser orientation for fluorescence: Frosted surfaces might be an issue. I found that with the PLab cu..." | Read more » | about 8 years ago | |||
| stoft | "Dave, I'll comment in reverse order: The Spekwin plots: While I do not have/use that program, I can see that the plot has auto-detected peaks and..." | Read more » | about 8 years ago | |||
| stoft | "I'm not understanding your results as shown in the graph of processed data so here's a few thoughts and questions: It can be helpful, when showin..." | Read more » | about 8 years ago | |||
| stoft | "Unfortunately, LED wavelength does not change with applied voltage or current -- their center peak wavelength is not variable or controllable and P..." | Read more » | about 8 years ago | |||
| stoft | "Sure ... what's the LED's packaging style/type? SMD, leaded, ...? " | Read more » | about 8 years ago | |||
| stoft | "Right and I'm still believing that repeatability errors with the PLab-web-cam-slit-hardware configuration all too often hints at differences which ..." | Read more » | about 8 years ago | |||
| stoft | "The both curve sets appear to have some variation which I believe is simply attributable to the repeatability error of the spectrometer with >2n..." | Read more » | about 8 years ago | |||
| stoft | "BTW .... the comments about LED 'voltage' perspective do not seem inline with LED parameters. With LEDs, it's not the voltage, it's the current you..." | Read more » | about 8 years ago | |||
| stoft | "Note: Their UV source was a PTI LS-100 fluorescence spectrophotometer -- no longer sold. From a google books print, it sounds like a variable-wavel..." | Read more » | about 8 years ago | |||
| stoft | "Note: The article can be downloaded w/o signing up using the 'Download Full Text' button at the upper right of the image frame on the web page. Fr..." | Read more » | about 8 years ago | |||
| stoft | "Aha; a very good description which explains things I'd read. I think it also directly supports my present contention that with a 400nm source and t..." | Read more » | about 8 years ago | |||
| stoft | "RIght, Jeff, those are good questions and I'm not a Chemist -- I'm just extracting from what I glean from the web. But I think it would be good to ..." | Read more » | about 8 years ago | |||
| stoft | "https://publiclab.org/profile/ethanbass - Thanks for your comments. As to your last note about my final plot: What I see is the depth of the "notch..." | Read more » | about 8 years ago | |||
| stoft | "Ok, good points and questions. [ I do not intend to sound abrupt. I'm just focused on raising technical issues I see within and surrounding this t..." | Read more » | about 8 years ago | |||
| stoft | "Great! Yes, little glitches do creep in but yes, this Solux corrected plot has a much better shape. I'm guessing the slight curve variation between..." | Read more » | about 8 years ago | |||
| stoft | "Jeff, thanks for pointing this out. I admit I do find the SWB terminology a bit overloaded and the user interface 'unexpected' as I'm not used to i..." | Read more » | about 8 years ago |