While working on the Kohonen Self Organizing Map, I encountered difficulties in understanding how the axis parameter in NumPy works. Initially, in a 2-dimensional scenario, we have coordinates (x, y), where x represents the width or number of rows, and y represents the height or number of columns in the matrix. However, things become more complex when we introduce another dimension.

Racket, why racket? I don’t know the main reason, but it is interesting and importantly my professor requires it for our Psychology course. I have never learned Racket before but I have a bit of experience in Erlang. In Erlang we cannot assign a value to a variable like Racket because = operator is a pattern matching that is similar to car and cdr. The game is totally changed in Racket. Now we can just define whatever value we want.

After many hours of googling, mermaid is finally run on Github Page, thanks to Jojozhuang. I may not write another note for mermaid so I put the info here.

Congrats to all of you that already here in Waterloo Region. Today I will summarize the process of becoming an international student in Canada. And I hope you will have a great experience here!

We are gonna go through filter(), arrange(), select(), mutate(), summarise(), group_by(), slice(), rename(), transmute(), sample_n(), sample_frac()

A few days ago, I wrote a note detailing how to set up a simple TCP client and server using netcat. Today, I have taken things a step further by capturing packets in Wireshark and providing a step-by-step explanation of how the TCP flow works. In the table below, you can find a general overview of this process.

Many of us have heard about decibel unit in our daily lives, as it can be used to describe the loudness of our speakers, the strength of our antennas, or the signal strength from a transceiver. But what exactly are decibels (dB) and dBm? In this discussion, let’s explore these concepts and expand our understanding.

During many of my interviews, I have been asked whether I understood TCP and UDP, and how they differed from each other. While I knew that TCP had an error-checking procedure that made the protocol more reliable but slower than UDP, my understanding was limited. Although I had learned about the detailed structure of these protocols in school, I didn’t have a chance to get hands-on experience with them. However, I later discovered an easy way to explore TCP and UDP packets using Windows Subsystem for Linux (WSL) and WireShark. As a result, I would like to share what I have learned today.