Viewing profile — belzebalex

A nice mention about this is the outstanding and quiet work of the Cosys-Lab of the University of Antwerp. They once put a microphone array below a scorpio, and showed how bats mov…

1) and 3) are valid, but 2) isn't really. In that sort of pipeline, you usually do IQ sampling which allows you to phase-shift by any arbitrary value with a complex multiplication.…

The main reason is that it's tough to have a uniform sound pressure distribution on a stage. That means the people at the front usually have very high sound levels, while those at …

This is quite sad, I've been very inspired by the writings of Artem Litvinovich [1] (although he stopped publishing 8 years ago). I inspired a lot of my research on what he did. ht…

This is incredible. I've wanted to thank the author for a while for his past articles [1][2] which have been a wonderful source of information when working on my sonar systems [3].…

I tried to use SymPy for a similar problem: computing the Jacobian of a complicated integral using quaternion rotations. Problem was that the symbolic results were way too complica…

Role: Six-month intern/fixed term job March-September 2024 Location: Anywhere in the world (on-site), willing to relocate Skills: * Digital signal processing, machine learning, com…

One method that solves 99% of your control problems is the Ziegler-Nichols method [1]. It's a shame it's not taught more often. No need to model your system, just increase the P ga…

Yes it does, you have to manipulate the expression to make it adimensional. But this rule-of-thumb is only valid for systems whose response time is less than 500ms.

I'm working on a 3d sonar to replace costly lidars. Already have a state-of-the art prototype that has better performance than $3k lidars for under a hundred bucks. Applications ar…

Role: Six-month intern/fixed term job March-September 2024 Location: Anywhere in the world (on-site), willing to relocate Skills: * Digital signal processing, machine learning, com…

Got my first internship building drone navigation systems after building my own quadcopter flight control board (software included) ( https://github.com/alextousss/quadcopter ) By …

Role: Six-month intern/fixed term job March-September 2024 Location: Anywhere in the world (on-site), willing to relocate Skills: * Digital signal processing, machine learning, com…

I'm surprised this does not include the excellent Alchitry boards [1] which are quite cheap and capable ($100 for an Artix-7 35T dev board is a steal) [1]: https://www.sparkfun.com…

Location: USA/out of France Internship Willing to relocate: Yes, from France Technologies: C, C++, Python, Javascript, Django, React, Verilog, Arduino, STM32, ... Résumé/CV: alexto…

Location: USA/out of France Internship Willing to relocate: Yes, from France Technologies: C, C++, Python, Javascript, Django, React, Verilog, Arduino, STM32, ... Résumé/CV: alexto…

Location: USA/out of France Internship Willing to relocate: Yes, from France Technologies: C, C++, Python, Javascript, Django, React, Verilog, Arduino, STM32, ... Résumé/CV: alexto…

Built one of the first 3d ultrasonic scanner that works in the air to make an autonomous drone [1] [2] [1]: https://www.alextoussaint.com/2021-04-28_How-I-built-an-ultr... [2]: htt…

Location: USA/out of France Internship Willing to relocate: Yes, from France Technologies: C, C++, Python, Javascript, Django, React, VHDL, Arduino, STM32, ... Résumé/CV: alextouss…

How did it end?

I think your analysis is great, but a better solution might be to just pay and consider teachers better. Here's a data point: in France, after high school, we're put for two years …

Was badly stressed preparing for the entrance exam for engineering schools. It was to the point I had heart palpitations for hours. Two things made it disappear: - Sport, even just…

You're completely right. I think the second order effects are negligible at this scale.

Not at all! There are many "Ecole Normale" which are just schools for teachers. The "Superieure" refers to the fact that you have to pass a hard exam to get in. And once there you …

Author here, the title is a bit misleading. In the article, I specify that it's the first 3d ultrasonic scanner (of my knowledge) that works in the air .