| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| warren | "Note to self: found possibly-suitable boxes: http://www.uline.com/Product/Detail/S-12694BL/Retail-Boxes/9-x-6-1-2-x-2-3-4-Black-Colored-Mailers?mod..." | Read more » | over 10 years ago | |||
| warren | "Sorry -- he is going to try to reproduce this experiment. :-P " | Read more » | over 10 years ago | |||
| warren | "Scott has ordered some laser pointers and is going to try to reproduce. " | Read more » | over 10 years ago | |||
| warren | "@jeffh - do you think it'd be possible to do such analysis using a blue or ultraviolet LED, instead of a laser? I wonder if it would be safer (for ..." | Read more » | over 10 years ago | |||
| warren | "@stoft - the reference was just the UV laser. I didn't have an empty vial at the time but you're right that we should do that test. The sample is a..." | Read more » | over 10 years ago | |||
| warren | "Hi, Livio - what kind of sample is it? A water sample from the creek, or a soil sample soaked in mineral oil? If the latter, what did the soil look..." | Read more » | over 11 years ago | |||
| warren | "Hi, Peter - we have gotten as low as 360 nm, and i think the glass cutoff is 350. There is some brainstorming on how to get lower than 350 on this ..." | Read more » | over 11 years ago | |||
| warren | "Hi, Minh! There's a thread discussing this feature in progress here: https://github.com/jywarren/spectral-workbench/issues/108 " | Read more » | over 11 years ago | |||
| warren | "I'm hoping to put together a page at http://publiclaboratory.org/wiki/diffraction-gratings to list different types and pros/cons. There have been s..." | Read more » | over 11 years ago | |||
| warren | "Cool. i don't think there's a page yet but one like http://publiclaboratory.org/wiki/uv-spectrometry or similar would be great. I've started taggin..." | Read more » | over 11 years ago | |||
| warren | "Thanks, the normalization steps are very helpful. Also, i'm starting to compile use cases here: http://publiclaboratory.org/wiki/spectral-analysis..." | Read more » | over 11 years ago | |||
| warren | "Wow, awesome. Are there up-to-date price lists available? The Hoya 340 filter being only ~$30 is great. " | Read more » | over 11 years ago | |||
| warren | "I want to implement this next but need to find a best-practice way to normalize the area under the graph... ideas? It would be nice if it were fair..." | Read more » | over 11 years ago | |||
| warren | "I'm creating a new Github issue for the equal-area feature... but if i understand, it would only be useful for fluorescence, is that right? not abs..." | Read more » | over 11 years ago | |||
| warren | "I was definitely thinking of a trim function so I'm glad you mentioned it! Also I think I have spectrum reversal issues figured it... the app can n..." | Read more » | over 11 years ago | |||
| warren | "Cool - should we add a "normalize data" function to the online analysis tool? " | Read more » | over 11 years ago | |||
| warren | "Im curious-- what wavelengths are you looking at to ID the bluing agent? Do you have a control sample for comparison? " | Read more » | over 11 years ago | |||
| warren | "Wow, what a great use for the spectrometer -- I tend to think of it as just a prototype but I love hearing how people are already putting it to use..." | Read more » | almost 12 years ago | |||
| warren | "Haha, yeah. I'd like to try to repeat some of these tests with a green laser, i've been having a lot of success and its easier to isolate the sourc..." | Read more » | almost 12 years ago | |||
| warren | "sorry it's not displaying both spectra - but here's the raw UV LEDs: the other spectrum (the first one) is actually of UV light reflecting off ..." | Read more » | almost 12 years ago | |||
| warren | "Scott - i bought a nice UV lamp that's bright, durable and cheap on Amazon: http://www.amazon.com/LEDwholesalers-Ultraviolet-LED-flashlight-7202UV..." | Read more » | almost 12 years ago | |||
| warren | "thanks for the suggestion. I sent the UV camera off to another PLOTS chapter but hope to get it back soon. The Hoya 340 filter we're using does not..." | Read more » | over 12 years ago | |||
| warren | "Yeah... i was photographing flowers because i've heard that they look quite different in the UV range, since many pollinating insects can see UV. " | Read more » | almost 13 years ago | |||
| warren | "Adam Griffith reported back that: Beaufort County, SC contracted with Fugro Earth Data for the image acquisition. This is a very expensive techniq..." | Read more » | about 13 years ago |