| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| warren | "Great question -- I used tags to add the prompt for posting replications; if you're willing, would you mind posting your results using the button a..." | Read more » | over 7 years ago | |||
| cfastie | "You are correct that this is not really an extraction. It's just plant material chopped up finely in a blender with some liquid. I also did this wi..." | Read more » | over 7 years ago | |||
| iamkat | "Hi, I tried to re-create the lycopene extraction with methanol and ethanol (lab grade) but didn't get anywhere. It's my understanding that they are..." | Read more » | over 7 years ago | |||
| cfastie | "nbawawa, Yes there is a lot of potentially confusing information in this research note. The note is about a very special case in which photosynthe..." | Read more » | almost 10 years ago | |||
| nbawawa | "hi guys, it's my first post here, sorry for my english but I'm a french native speaker :o) Just to be sure : if well understood, the goal of th..." | Read more » | almost 10 years ago | |||
| mathew | "sorry, I was confused. clearly dual camera. " | Read more » | over 10 years ago | |||
| cfastie | "Mathew, To make sure there is no confusion, the (NIR-Red)/(NIR+Red) formula is not used for the BG3 filter because there is no red visible channel...." | Read more » | over 10 years ago | |||
| mathew | "You and Ned are doing a great job of fleshing out this red vs. blue NDVI issue. thanks. its interesting to me that you can get such clear results..." | Read more » | over 10 years ago | |||
| mark9700 | "Hello Everybody Quite interesting materials ! " | Read more » | over 10 years ago | |||
| cfastie | "Excel allows nesting if statements, so: if((if(red>green,red,green))>blue,(if(red>green,red,green)),blue) should work, if you're not int..." | Read more » | about 11 years ago | |||
| cfastie | "=max(blue:red) is soo much easier. Thanks. The greater of three method seems to be useful for transmission or absorption spectra when a continuous..." | Read more » | about 11 years ago | |||
| cfastie | "Dan, you are correct that all we want to know is how the light intensity varies across the sensor where the grating has spread out the spectrum. Un..." | Read more » | about 11 years ago | |||
| warren | "The Bayer filter is frustrating, but if we can figure it out, it might be a hidden plus for us; in some ways, the R, G, and B channels can be treat..." | Read more » | about 11 years ago | |||
| danbeavers | "Perhaps I missed the explination but please help me understand why you don't just sum the 3 bands. It seems to me that the operative filter is the ..." | Read more » | about 11 years ago | |||
| Tom_H | "I think the essence here is that you have to watch carefully what is going on and choose a method that seems most appropriate for the situation. Th..." | Read more » | about 11 years ago | |||
| Tom_H | "Blown out data should show up as 255 in the csv file and thus would appear in a graph as peaks with a flat top (plateau) when graphed in excel, and..." | Read more » | about 11 years ago | |||
| Tom_H | "A simpler formula is: =max(red:blue) " | Read more » | about 11 years ago | |||
| cfastie | "Tom, I'm glad you asked. The proper Excel expression for choosing the greatest among three values did not come to me quickly, so I just used the eq..." | Read more » | about 11 years ago | |||
| Tom_H | "Hi Chris, How did you pick the color channel with the highest value? Did you write an expression for Excel to pick the highest value and use that? ..." | Read more » | about 11 years ago | |||
| cfastie | "I guess they plate the stainless steel mesh with gold to keep metallic flavors out of your tea (also used for coffee filters). I noticed it in the ..." | Read more » | about 11 years ago | |||
| danbeavers | ""I filtered it through a gold tea strainer" Man, I can't hold a candle to that! " | Read more » | about 11 years ago | |||
| danbeavers | ""I filtered it through a gold tea strainer" Man, I can't hold a candle to that! " | Read more » | about 11 years ago |