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bouchard

278 karmajoined vor 7 Jahren
Research engineer working on rotorcraft aeromechanics.

Submissions

Wisk, Boeing Sued over eVTOL Software Safety Claims

ainonline.com
9 points·by bouchard·vor 5 Tagen·0 comments

Zotero 8

zotero.org
245 points·by bouchard·vor 6 Monaten·58 comments

Former NASA chief says US needs to start over with moon landing plans

space.com
7 points·by bouchard·vor 7 Monaten·0 comments

Engineering Design Optimization by Martins and Ning

mdobook.github.io
1 points·by bouchard·vor 7 Monaten·0 comments

F-35 beat Gripen fighter jet 'by a mile' in 2021 Defence Department competition

cbc.ca
5 points·by bouchard·vor 8 Monaten·3 comments

Comments on "Glauert's optimum rotor disk revisited"

wes.copernicus.org
6 points·by bouchard·vor 8 Monaten·2 comments

UnPlotter: Extract numerical data from PDF figures

unplotter.com
2 points·by bouchard·vor 8 Monaten·0 comments

comments

bouchard
·vor 5 Tagen·discuss
[dead]
bouchard
·vor 5 Tagen·discuss
The repository hasn't been made public yet it seems.
bouchard
·vor 10 Tagen·discuss
What field are you in that you'd actually wait two years, rather than retract your submission and go somewhere else?
bouchard
·vor 10 Tagen·discuss
Their "technical validation (CFD)" document looks like AI slop...
bouchard
·vor 10 Tagen·discuss
Rejections from journals are not uncommon and sometimes it's for somewhat questionable reasons.

Uploading the manuscript to a preprint server and/or submitting to another journal, which Adamala is doing/planning to do, is the normal response.

Sending it to journalists beforehand is what I consider an overreaction.
bouchard
·vor 10 Tagen·discuss
> “It’s an unusual way of doing things,” says Kerstin Göpfrich, a synthetic biologist at Heidelberg University.

That's being kind; it's a complete overreaction, simply put.
bouchard
·vor 5 Monaten·discuss
> Yes 1-based indexing is a mistake. It leads to significantly less elegant code - especially for generic code - and is no harder to understand than 1-based indexing for people capable of programming.

Some would argue that 0-based indexing is significantly less elegant for numerical/scientific code, but that depends on whether they come from a MATLAB/Fortran or Python/C(++) background.

A decision was made to target the MATLAB/Fortran (and unhappy? Python/C++) crowd first, thus the choice of 1-based indexing and column-major order, but at the end of the day it's a matter of personal preference.

0-based indexing would have made it easier to reach a larger audience, however.

> and is no harder to understand than 1-based indexing for people capable of programming.

The same could be said the other way around ;-)
bouchard
·vor 5 Monaten·discuss
The approach could be helpful for searching though large 3D model libraries like GrabCAD for some visual placeholder part by just describing it.

The generality of the part descriptions made me chuckle.

> A bevel gear with a circular base and a series of angular, tapered teeth extending radially outward. The teeth are uniformly distributed around the circumference, allowing for meshing at an angle with another gear. The gear's face includes a set of holes, varying in size and symmetrically arranged around the central bore, likely for weight reduction or mounting purposes. The central opening likely acts as an axle or shaft attachment point. The design facilitates the transmission of rotational motion between intersecting shafts, typically at a 90-degree angle.
bouchard
·vor 7 Monaten·discuss
This is a about Groq, not Grok (Musk's chatbot).
bouchard
·vor 8 Monaten·discuss
Comments on the claims made by Penn State's PR department in "Student refines 100-year-old math problem, expanding wind energy possibilities"

> https://news.ycombinator.com/item?id=43162544
bouchard
·vor 9 Monaten·discuss
Meh, depends what's the goal. Exceeding predicted performance is not a screw up, it's just providing a minimum guaranteed performance aka playing it safe (under promise, over deliver).

Also, we don't know by how much the most optimistic predicions were exceeded.

Makes for nice marketing ;)
bouchard
·vor 9 Monaten·discuss
Depends if you make overly conservative assumptions in your modeling...
bouchard
·vor 10 Monaten·discuss
Using greek symbols as public-facing function arguments, etc. is definitely not recommended, and not that common (at least in my experience).

It's best used for internal calculations where the symbols better match the actual math, and makes it easier to compare with the original reference.