Best of PhenoCam: Half Dome at sunset

Another PhenoCam gem! Half Dome rises almost 3000m above sea level at the eastern end of the Yosemite national park. The western side lights up in the evening sun. That’s a lot of magnificent granite in the evening sun. Recently Google documented the ascent of another famous rockface in Yosemite, El Capitan, using their street view project. It makes for a good read and some sweaty palms if you are not so comfortable with heights.

Autumn in reverse

Red foliage is often associated with autumn. Yet the same pigments, anthocyanin, which makes for spectacular leaf peeping in autumn is also present during spring, although short lived and more subtle.

Multispectral raspberry pi: EVI – NDVI comparison

Today two filters arrived in my mailbox, one filter is a bandpass filter from 400-710nm, the other filter is a longpass filter with the cut-off at 721nm. Narrower band pass filters are available and I might order one to see if this further improves image quality.

Basic Local Alignment – DNA fiddling

My flatmate was doing some manual queries of DNA sequences using the National Center for Biotechnology Information (NCBI) online Basic Local Alignment Search Tool (BLAST). Doing this manual seemed like a waste of time. So, I looked around a bit to find an optimal automated solution. After trying several R and Perl solutions, nothing seemed stable enough to be of any use. In the end I settled on Biopython and their online query routine in their Blast class of tools. Of all tools this seemed the most mature and especially the most stable for querying the NCBI server.


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