Sun 05 October 2025

Smaller environment (Photo credit: wikipedia)

I recently tried to measure the environmental impact of this website. I used an online tool. The result shows the easiest way to improve my score was to reduce image sizes. This could easily be done with ImageMagick.

I wrote a small bach script to resize my files:

#!/bin/bash

# resize images for web use

target_size=200 # in kb
output_dir="web"
mkdir -p $output_dir

resize_image() {
    echo "image $1..."
    output_file=$output_dir/$1
    cp "$1" "$output_file"
    current_size=$(( $(stat -c%s "$output_file") / 1024 ))
    factor=95
    while (( current_size > target_size ))
    do
        echo "current size: $current_size"
        current_size=$(( $(stat -c%s "$output_file") / 1024 ))
        magick "$1" -resize $factor% "$output_file"
        factor=$(( factor - 5 ))
    done
}

for image in *jpg
do
    resize_image "$image"
done

It tries several resize factor (while loop, factor being redefined line 20) until the output size is lower than a predefined threshold.

Then, I needed to replace path in all my articles.

Category: how to Tagged: bash jpg magick web blog how to

Thu 26 September 2024

Tokens stream in macro (photography) (Photo credit: wikipedia)

I recently try to write a proc_macro in rust but failed to find enough example and I didn't have all the needed knowledge to fully understand the examples I found.

Category: howto Tagged: rust programming tutorial, howto

Sun 18 August 2024

rusty python logo

The goal of this article is to use the rust polars directly to perform a common machine learning task I usually do using python.

Category: how to Tagged: rust maths how to machine learning k-means polars

Sun 17 March 2024

(Not mastermind) code breaking machine (Photo credit: wikipedia)

I recently watch a video [1] explaining how to solve mastermind. I wanted to try it myself, so I coded it in rust. Here are the code and the playground.

Update: 2024 edition with more colors.

Category: maths Tagged: rust maths game game theory

Thu 20 July 2023

Satellite optimized (Photo credit: Wikipedia)

GNSS's basic functionality works as follow: Satellites sends their position and their local time frequently. The time is synchronized between satellites thanks to the most accurate time keeping devices ever made (atomic clock). Each GNSS constellation implements its own time (e.g. GPS time). The …

Category: maths Tagged: python maths optimization

Sat 27 August 2022

Rocket burn (Photo credit: Wikipedia)

Category: aviation Tagged: aviation Fight dynamics rocket science

Wed 27 July 2022

Differential thrust (Photo credit: GE)

Category: aviation Tagged: aviation Fight dynamics rocket science

Fri 22 April 2022

Children approving their teacher (Photo credit: Wikipedia)

This article is an update of the the previous one. It adds the approval voting method and fix few errors.

Category: python Tagged: geopolitics python vote

Wed 02 February 2022

(not Condorcet) duel (Photo credit: Wikipedia)

Many voting methods exists, and I want to explore results yields by some of those.

For the argument stating one specific voting method is better than another one, I let the reader see this article from science étonnante (fr) , this video from la statitique …

Category: python Tagged: geopolitics python vote

Fri 28 January 2022

Transparent voting box (Photo credit: Wikipedia)

This article presents personal thoughts on voting methods. More specifically, it presents guarantees offer by the traditional non-electronic voting method and won’t elaborate on electronic voting.

Category: reflections Tagged: geopolitics reflection vote