August 11, 2020

Revisiting Alkali Metals

This is a note on alkali metals. I actually haven’t visited chemistry much since graduating high school back in 2009, but recently when I look for science experiment demonstration videos...

August 02, 2020

Gamma Distribution, Poisson Process, and Gamma Function

Gamma distribution is used to model the waiting time of a Poisson process, similar to exponential distribution. According to this article by Aerin Kim, the difference is that the exponential...

July 23, 2020

Hazard Function in Survival Analysis

I’m using this video as my introductory lesson to the hazard function. The hazard function can be defined as follows. \[h(t) = \frac{f(t)}{S(t)}\] Given that \(S(t)\) is the survival function...

July 18, 2020

Lattice and Lattice-Based Access Control

I happened to stumble upon this article by Ravi S. Sandhu from George Mason University. The article was stored in a server run by the Electrical Engineering and Computer Science...

July 14, 2020

Weibull Distribution

We’re going to take a look into the Weibull distribution. As explained in this slide from Maynooth University, the Weibull distribution is commonly used to model the time to failure...