nickparker

7 ms·

1.
An Open Source Motorized XYZ MicroManipulator – Affordable Sub µm Motion Control [video](youtube.com)
8 points by nickparker 8mo ago|2 comments
2.
by nickparker 8mo ago
Incredibly well executed Youtube project IMO. The DIY many-poled rotary encoders are particularly gorgeous cost engineering in a hobby project like this.
3.
by nickparker 8mo ago
Fun old project but the technology has improved[0] since then. https://www.youtube.com/watch?v=MgQbPdiuUTw
4.
by nickparker 1y ago
I have a fun omega-3 anecdata point going right now. A friend of mine researches the stuff in mouse models and told me it's extremely beneficial, but you need to buy a fancy brand to avoid rancid oil or heavy metal contamination both o
5.
by nickparker 1y ago
It works if you just plainly describe what you're looking for, I write a new prompt for different images just like "re-render this as a matte untextured 3d model, remove all details except geometric form"
6.
by nickparker 1y ago
I've had surprising success with meshy.ai as part of a workflow to go from images my friends want to good 3D models. The workflow is 1. Have gpt5 or really any image model, midjourney retexture is also good, convert the original image
7.
by nickparker 1y ago
Bad popularizing article, doesn't cover the actual conclusion: The main points emerging from the combined simulation and experimental study on atmospheric entry of the paper plane are: • Orbit: The paper space plane de-orbits from LEO
8.
by nickparker 2y ago
Also the GOAT of cable laying articles: Neal Stephenson doing gonzo journalism on the topic in the 90s https://euripides.dk/setebos/frx/matrix/ai/books/stephenson_...
9.
by nickparker 2y ago
I found myself reading this more for the excellent notetaking than for the content. I suspect the discussion was about as charged, meandering, and nitpicky as we all expect a PL debate among deeply opinionated geeks to be, and Jake Edge (wh
10.
by nickparker 3y ago
> RO desal splits the incoming ~3% salinity stream into two halves, one fresh and one ~6% salinity. This concentrated brine is fed to adjacent brine processing facilities (ideally in both countries) that exploit the region’s abundant sol
11.
Servo Pistons: DIY-friendly low hysteresis actuators with integral sensing(nickparker.co)
2 points by nickparker 3y ago|0 comments
12.
by nickparker 3y ago
IIRC we've found some big exoplanets in wild orbits. They tend to form in a circular-ish orbit because that's how you get a big enough chunk of the dense bits of an accretion disk, but interactions with other planets/stars
13.
by nickparker 4y ago
Please also be careful about selling to incumbents without a strong guarantee (ie contractual penalties) your product will stay in market for many years. I know smoke detectors and a couple other crappy home goods have been fixed by scrappy
14.
by nickparker 4y ago
Almost nobody in tech is interested in the degrowth solution to climate change, we’re all in on increased affluence with tech mitigations for the environmental harms. Somebody’s gotta book all the electric / / synfuel powered flig
15.
by nickparker 4y ago
Active vacuum insulation isn’t a thing because you need high vacuum to reduce thermal conductivity at all , because mean free path and therefore specific conductivity grows at the same rate density decreases until mean free path exceeds th
16.
by nickparker 4y ago
Anyone curious about psychedelic methods of action, particularly based on their personal experience, should read Surfing Uncertainty or at least the SSC review/summary of it. The predictive processing interpretation of these drugs is t
17.
by nickparker 4y ago
Jane Street recruits silly hard from Cornell’s CS dept because part of our required curriculum is functional programming w OCaml. They definitely introduce a lot of math/cs kids to the idea that finance can be a meaningful technical ch
18.
by nickparker 5y ago
Water also has an almost uniquely large enthalpy of melting. EG paraffin freezing releases 1/3 as much heat as water
19.
by nickparker 5y ago
The tether article a week or two ago described them lending tremendous amounts of USD to exchanges and various crypto bank-like entities with Bitcoin as collateral “ I also learned that Tether had lent billions of dollars more to other cryp
20.
by nickparker 5y ago
Has anybody reverse engineered the interface for Apple's camera modules, particularly the front modules with LIDAR? They can be had for $10 a pop on Alibaba now, and they're much nicer than similarly priced webcams let alone LID
21.
by nickparker 5y ago
In the original General Fusion plan: Pneumatic pistons which strike anvils in the chamber wall creating a shockwave which implodes the liquid wall with fusion-igniting pressures. I think they may have moved away from that in favor of big pn
22.
by nickparker 5y ago
https://caseyhandmer.wordpress.com/2019/09/20/no-really-spac...
23.
by nickparker 6y ago
Scrolled pretty far and haven’t seen mention of this: Water shortages will be entirely solved in the next decade by cheap renewables and desalination. Clean water can be manufactured, and effectively free electricity will make it dirt chea
24.
by nickparker 6y ago
This process has nothing to do with sintering - it's a new material for FDM that supports electroless nickel plating. The hypothetical medical application is probably to seal a surface and/or apply functional coatings, eg various
25.
by nickparker 6y ago
I want somebody to isolate these, re-engineer them to respond to a control input, and use them to implement nanowire network reservoir computing https://www.sciencedaily.com/releases/2019/12/191226084403.h...
26.
by nickparker 6y ago
Casey Handmer argues [0] that The best solution is an “air mattress” structure where anchor cables are spaced throughout the structure to resist the pressure load. The anchor cables can scale linearly with area just like the pressure does,
27.
by nickparker 6y ago
Hmm yeah that does sound like a permanent change in the second link doesn't it? Too bad, I was really rooting for their plan.
28.
by nickparker 6y ago
Can you point me to where they say the central cones are a change in their hypothetical production design? I was under the impression it's just there for diagnostics in the sub-scale prototype.
29.
by nickparker 6y ago
Huh, I suppose you do! I had a naive short-circuit in my head that "neutron flux is bad because it destroys your your materials. If your material is molten lead anyway who cares?" I also didn't know lead has such a low neutro
30.
by nickparker 6y ago
Have you seen General Fusion? They spin a large ball of molten lead using pumps and shoot hot plasma into the vortex that forms in the middle, then strike the walls of the lead chamber with carefully timed steam pistons to make an implosion

More ›