Posted by david927 1 day ago
Ask HN: What are you working on? (May 2026)
Given a distance, an allowable time to reach that distance, a payload to send, and an expected exhaust velocity, how would you calculate the time required to convert energy into antimatter fuel and how much antimatter needed to arrive at the destination (starting from the Moon)?
There are a few side calculations, such as the size of the radiator, estimated footprint of the fusion reactor itself, and how much metamaterial is needed. This is to help figure out timelines for a sci-fi novel, so ballpark answers are completely fine.
The calculations yield what appear to be values around the correct order of magnitude. Would be delighted to have insights, comments, and corrections.
Plus it's too early to really show, but also working on a dataflow language (w/ immutable data) that uses some code semantics from Rust/Zig and friends: https://github.com/jonathannen/badger
I am also working on various other things (a Go Clojure interpreter with IR/WASM, my own inference library, etc.). All are linked from the page above to a degree.
- Visual tool for building strategies
- Backtest on site or MT5 EA using same json configurations
- Running EA live (or paper mode) in prod automatically feeds the trades back to the site for analysis
- The thing I am most happy with: you can click any trade in backtest result and see exactly which rules were true at the bar that fired
You can try it in action w/o signup using taster page (https://foxtradetools.com/taster)
Solo dev. Open to any feedback.
You get to choose the genres you're interested in, and it creates playlists from the music in your library. They get updated every day - think a better, curated by you version of the Daily Mixes. You can add some advanced filters as well, if you really want to customise what music you'll get.
It works best if you follow a good amount of artists. Optionally you can get recommendations from artists that belong to playlists you follow or you've created. If you don't follow much or any artists, then you should enable that in order for the service to be useful, as right now that's the only pools of artists the recommendations are based on.