Cosmic Discord

Thinking of correlations

Statistical correlation with rule of thumb, the visual way, and the mathy way

Posted on December 29, 2022

Ever since I received Daniel Kahneman’s Thinking Fast and Slow as my birthday present, it is one of my new favorite non-physics non-fiction books. It has lots of interesting points about how the mind works. As a professional from a different field but employing lots of similar methods, I can... [Read More]

Tags: pop science statistics

Physicists' Toolbox Part II

The Bayesian approach

Posted on December 28, 2022

Have you ever wondered how a physicist gets convinced by a result? I sure did even before I entered physics. I’m also sure you have heard a lot of statements like “we will change our mind if we see enough evidence.” So what’s enough and how much is too much?... [Read More]

Tags: pop science statistics

Physicists' Toolbox Part I

A quick tour to the tools we use for our daily drives, order-of-magnitude estimate

Posted on December 27, 2022

It’s been such a busy year for me. I went through the painstaking job application (perhaps worth a post in the future) in January, helped my family to recover from COVID in April, worked on a grant proposal in July, took care of my family during a medical issue in... [Read More]

Tags: pop science

Migrate from Slack to Mattermost

Posted on September 1, 2022

So recently there was a change of policy from Slack. If your team is on a free plan, starting from Sep 1, 2022, you’ll only have access to messages in a channel within 90 days. Previously, it allows access of 10k messages regardless of the date they were sent. In... [Read More]

Tags: meta-physics

Understanding CMB and LSS

Introductory Lectures of CLASS the Boltzmann Solvers by Julien Lesgourgues

Posted on October 3, 2021

While house-keeping my old hard drive I found these videos. Although they are at the introductory level, and CLASS has since evolved quite a bit, they nontheless are a good starting point for students who want to try their hands at it. I hope they could give you a jump... [Read More]

Tags: cosmology computation