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…

# Category: Education

## Bandlimited channel

By Shannon-Nyquist theorem, a bandlimited signal can be completely reconstructed with samples per second. Think of the opposite way, this means that each second we have independent components that we can vary for each second. The total noise power per second is and as it is spread over channel, the noise per component is ….

## 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…

## Install Docear to 18.04

Docear runs fine on Ubuntu 18.04 but not out of box. The culprit is the new Java. One has to restore back to jdk 8.0 to get it work.

## Docear Google Scholar fix

Docear’s google scholar fetcher was not working probably for several years. However, it can be easily fixed following this post.

## 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…

## Lagrange’s theorem, Euler’s theorem, Fermat’s little theorem, and a short introduction to groups

A group in the context of math is a simple algebraic structure with a product operation . Naturally, the operator won’t be of much use if the structure is not closed under the operation. Namely, we would like to have also in if both elements and are in . Moreover, we would like to…

## SageMath

Trained as an electrical engineer, I am most comfortable with Matlab in terms of serving my math need. However, for symbolic math problems, Matlab is not as intuitive as Mathematica (of course, we can still do it though. Check out “syms”). But I never get used to the syntax of Mathematica. And I found the…

## Minimum requirements of a good engineering employee

As title, just some random thought… Able to get things done independently (should be something reasonably complex and takes days or weeks to finish) Care what he is doing and be responsible to his products Good understanding of the current progress of the project and able to communicate this with the team Just to be…

## Xournal for presentation

I am using more and more beamer this year. Since I used linux, I used to use evince to display my slides. But in my last class, I would like to write something on the slides and I was not prepared for that. My laptop is a nice good old X230t with a stylus on it….