My downstairs neighbour replaced their ceiling and the soundproofing's gone - what can I do?

All the flats in my block are leasehold and built in 1978. Noise from downstairs is now a nightmare after they replaced their ceiling. What can I do?
IEEE

A Combined Diffusion Model and Reinforcement Learning Approach for Solving the Vehicle Routing Problem With Multiple Soft Time Windows

Abstract: The Vehicle Routing Problem with Multiple Soft Time Windows (VRPMSTW) is a challenging combinatorial optimization problem where a fleet of vehicles must deliver goods to a set of customers, ...
Hackaday

Reviving A Scrapped Sound Blaster 2.0 ISA Soundcard

What do you do when you find a ISA Sound Blaster 2.0 card in a pile of scrap? Try to repair the damage on it to give it a second shot at life, of course. This is what [Adrian Black] did with one ...