aconz2

9 ms·

31.
by aconz2 3y ago
Pretty cool, uses 2 femtosecond laser wavelengths for reading and another 2 for writing, with certain combination of beam shape to localize the spot to ~50nm and can focus 3d in 1 um spacing. Not clear on how much z the spot takes since the
32.
by aconz2 3y ago
summary: generate 500M synthetic examples where you start with random constructions, deduce (not sure until saturation or fixed depth) and use each conclusion along with its dependency graph and original premises as a training example. The
33.
by aconz2 3y ago
My understanding is that they are picking a genome (in whole or in part synthetic / designed by them), a set of starting enzymes or transcription factors or the DNA sequence of those (not sure) (also in whole or in part synthetic), the
34.
by aconz2 3y ago
I couldn't find much info on the spatial aspect they are experimenting with. I was expecting to find different patterns like checkerboard, alternating lines, concentric rings etc and how they impact the co-culture dynamics. There are t
35.
by aconz2 3y ago
summary: improve prediction of run-time performance of a computation graph using GNN, they use an embedding dictionary for each node's opcode along with some other node features (eg shape, bits, window size, see [1]), they released a b
36.
by aconz2 3y ago
summary: given a program template/skeleton and a fitness function (# correct results, shorter programs, etc), generate a population of programs with LLM, use a prompt that generates a new program from k other versions (they found k=2 i
37.
by aconz2 4y ago
Yes, but most numbers I've seen on nozzle size / kerf size are too big by a factor of 2. In the worst-ish case for a cutting process that cuts a pill shape (rectangle with semicircle ends from a translating circular cut) by plungi
38.
by aconz2 4y ago
Oops, thanks for the catch. That is just a typo though, so the following price is still correct (500 * $0.25 == $125). Retail price per blade is $0.20 - $0.25. I've thought about the price premium and think it could go either way. The
39.
by aconz2 4y ago
Around 50 blades per month for the first year
40.
by aconz2 4y ago
Based on retail price of the existing blades (50 x 100mm blades == 1 x 50m blade) puts it around $125. If they make them for ~25% of that, each blade is ~$30. Though I anticipate a higher cost to develop the process if necessary.
41.
by aconz2 4y ago
I've come across those in my searching before, they are very cool! There is a guy on YT that did a CNC wire cutter for cutting sculptures out of big blocks of granite. For my application (wooden puzzles), the kerf is essential to be ~0
42.
by aconz2 4y ago
Idk, not a welding expert, maybe you're trying to tell me it is a-okay? What about the heat affected zone? What welding process are you thinking? > Any particular reason the reciprocating action of a normal scroll saw doesn't w
43.
by aconz2 4y ago
Yep! Easy to specify, hard to do!
44.
by aconz2 4y ago
I did contact some band-saw blade makers and the smaller dimensions I'm looking for are a different ball-game for them for so I only got "sorry, no can do" answers.
45.
by aconz2 4y ago
Responded to another welding comment, I am pretty sure its a no-go, but thanks for the thought! > Is this a one-off/prototype-type project? It is a prototype but I'd be looking for ~10 blades to start and then 100+ from there
46.
by aconz2 4y ago
Thanks for the thoughts! > Can an equivalent length of available-size blades be welded together (maybe trimming the ends first, if they lack teeth)? I don't think so, these blades are very narrow and thin -- 0.2mm x 0.3mm cross sect
47.
Ask HN: Can you make me a 50 meter scroll saw blade?
6 points by aconz2 4y ago|24 comments
48.
by aconz2 5y ago
You've made a silly mistake and just did 1/8th the work, so of course it was 8x speedup. I am still wondering how the numbers would look if you could inline atan2f from libc. Too bad that isn't easier
49.
by aconz2 5y ago
Nice writeup and interesting results. I hadn't seen the use of perf_event_open(2) before directly in code which looks cool. The baseline is at a huge disadvantage here because the call to atan2 in the loop never gets inlined and the lo
50.
by aconz2 6y ago
Latest update adds an option to unhide all bodies before exporting. Thanks for pointing this out! https://github.com/aconz2/Fusion360Exporter/commit/f3203902c...
51.
by aconz2 6y ago
Thanks for the feedback. File paths are always tricky and I will add something that removes some bad characters. Noted on the visible bodies, I haven't had much time to verify the output so I will look into that this weekend. Thanks ag
52.
Show HN: Bulk Fusion 360 Export and Sync(github.com)
23 points by aconz2 6y ago|6 comments
53.
by aconz2 9y ago
Came to say the exact same thing, all the problems mentioned aren't unique to continuations. I'm not saying this makes a positive argument to use coroutines everywhere, but it's not their fault. As ajuc mentioned, long-runnin
54.
by aconz2 9y ago
I see something like this and think about how much an ensemble approach to the data structure would help. This keeps popping up in places where you have a very general abstraction (like the DOM) and want to support a broad set of operations
55.
by aconz2 10y ago
Sure we're all making software which is just bits in memory, but I think that's an extreme simplification. Maybe you're thinking of how we're all just editing text to make programs? But then that doesn't account for
56.
by aconz2 10y ago
"If you want to write yesterday's software, use a laptop" - me / paraphrase of Alan Kay I think? I get why people are still blacksmiths making door handles and I think that's great. But I'd rather be in a giant
57.
by aconz2 10y ago
I'm 2 for 2 personally and 3 for 3 on family recommendations buying refurbished Dell Latitudes. I currently have the E6430u which is very nice and light with good Linux support; that's a bit old now but I just checked and you can
58.
by aconz2 10y ago
Where does all the hardware go when one decides to shut down an operation that large? Can I buy it?
59.
by aconz2 10y ago
The first part about comparing the callbacks in Javascript vs do notation in Haskell is super misleading. The do notation desguars to code that looks essentially identical to the Javascript version. Sugar is not a negligible consideration i
60.
by aconz2 10y ago
> I wrote this article because it seems to me the basic income discussion is orchestrated by people, notably in technology, who are unaware of politics and reluctant to get their hands dirty. While I myself am a programmer and support ba

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