nraynaud

from enum import Enum

class spinel_status_t(Enum):
    #< Operation has completed successfully.
    SPINEL_STATUS_OK = 0
    #< Operation has failed for some undefined reason.
    SPINEL_STATUS_FAILURE = 1
    #< Given operation has not been implemented.
    SPINEL_STATUS_UNIMPLEMENTED = 2
    #< An argument to the operation is invalid.

nraynaud

why are greases made of a metallic soap mixed with an oil?

Greases are made of a metallic soap mixed with an oil because this combination creates a semi-solid lubricant that combines the lubricating properties of oils with the structure and stability provided by soaps.

Here’s how it works:

1. Metallic soaps act as a thickener.

   • A metallic soap is a compound formed by reacting a fatty acid with a metal hydroxide (such as lithium, calcium, sodium, or aluminum hydroxide).

• This reaction produces a fibrous or sponge-like structure that can trap and hold oil within it — much like a sponge holds water.

nraynaud

Me

generate the corner values with the cross terms of the hessian, and show your code is correct in a comment

AI Assistant

I'll generate the corner values with cross terms for the Hessian matrix and create code to demonstrate its correctness.Looking at the code in the test file, I can see there's a function that needs to be completed to generate corner values with cross terms of the Hessian. Let me examine the current implementation and complete it: generateNeighborhood

    function generateNeighborhood (centerVal, gradient, hessian) {
      const neighborhood = [new Array(9).fill(0), new Array(9).fill(0), new Array(9).fill(0)]
      const setVal = (val, i, j, k) => {
        neighborhood[k][i + 3 * j] = val

nraynaud

Me

can you write compute_least_squares ?

AI Assistant

I'll write the function for you. Based on the context, this appears to be for refining extrema positions in a computer vision/image processing algorithm (likely SIFT or similar), where you need to solve the linear system Hx = -g to find the sub-pixel offset. compute_least_squares

fn compute_least_squares(hessian: mat3x3f, gradient: vec3f) -> vec3f {
    // Solve Hx = -g for x, where H is the Hessian and g is the gradient
    // This gives us the sub-pixel offset for extrema refinement
    

nraynaud

; stop.g
; called when a print is cancelled after a pause.

T-1
G1 X100 Y350 F35000

nraynaud

Notes on the mechanical design of the Sojourner rover

Nicolas Raynaud, February 2025

Wanting to build a fun robot mower, I studied the Sojourner rover as a base for my design. Looking at online 3D models, I fell into the rabbit hole of accuracy of historical artefact description. My goal in this document is to show the smart that JPL put in this little rover.

Marie Curie

The Marie Curie rover is a double for Sojourner, two rovers were built at the same time and the best one was selected to be sent to space. Today the Marie Curie rover is exposed at the National Air and Space Museum in DC. Most high resolution photos available are from this rover

nraynaud

# SPDX-License-Identifier: MIT
#
# Copyright (C) 2024 Olliver Schinagl <oliver@schinagl.nl>

ARG UBUNTU_VERSION="22.04"
ARG TARGET_ARCH="library"

FROM index.docker.io/${TARGET_ARCH}/ubuntu:${UBUNTU_VERSION}

ENV HOME="/build"

nraynaud

<?xml version="1.0" encoding="UTF-8"?>
<ufwb version="1.17">
    <grammar name="VMDK" start="id:6" author="Nicolas Raynaud" email="nraynaud@gmail.com" fileextension=".vmdk">
        <description>VMDK streamOptimized file format. Licenced under Affero GPL, the copyright owner is Vates SAS. This is a work for hire by Nicolas Raynaud.</description>
        <scripts>
            <script name="Sector64" type="DataType" id="142">
                <source language="Python"># custom data type script

def parseByteRange(element, byteView, bitPos, bitLength, results):
	# this method parses data starting at bitPos, bitLength bits are remaining

nraynaud

#include "am5729-beagleboneai.dts"  
// make it easy to determine which dtb you're currently running on  
// (via /proc/device-tree/chosen/)  
/ {  
 chosen {  
  base_dtb = "am5729-beagleboneai-custom.dts";  
  base_dtb_timestamp = __TIMESTAMP__;  
 };  
};  
// eventually these should be available in a header  

nraynaud

M500 P10