Journal paper list

Find a site called Resurchify that ranks journal papers. Another site we already used quite a bit is letpub.

coordinate transformation

I got confused over time of coordinate transformation for a point in space v.s. transformation of a point location with fixed coordinates. It turns out that the former is the exact reverse of the latter. I don’t include a proof here, but it should be self-evident. Also it is much easier to understand coordinate transformation…

coursera-dl

Coursera-dl is a wonderful tool but authentication doesn’t work out of the box. It will work after adding cauth option in coursera-dl.conf as here.

Multiple desktop with Ipad mini

As I continue to explore options for using Zoom for teaching, one thing I like a lot is that I can connect my laptop to a monitor and only show one of the screens on Zoom. This way I can easily control what my students can see and I can leave some “cheat sheet” or…

Bandlimited channel

By Shannon-Nyquist theorem, a bandlimited signal can be completely reconstructed with $latex 2W$ samples per second. Think of the opposite way, this means that each second we have $latex 2W$ independent components that we can vary for each second. The total noise power per second is $latex 2 W (N_0/2) = N_0 W$ and as…

PDF-XChange and Docear

PDF-XChange is the best compatible pdf reader for Docear. In Linux, I couldn’t manage to open pdf PDF-XChange even I changed it to default pdf reader. But this thread solves this. Basically “…If you want you can test it for yourself. In Docear, please use “Tools and settings > Miscellaneous > Preferences” to open Docear’s…

Docear export to latex

Docear is a very nice concept that unfortunately is quite broken because of lack of support. Export to Latex supposes to be a killer feature but as of 2018 it really does not run out of the box. A workaround is described here. Basically, a best solution is to use Saxon rather than using the export…