Viewing profile — pjbk

I copied the code from the book and then did my own mods. I also ended up rewriting the engine with 6502 assembly macros. That made me realize, and appreciate, high level languages…

I learned to program with some of these books. Usborne also quickly published them in Spanish, and I was lucky that some editorial companies used to go to my school to sell their b…

True. I have often encountered motion controllers where the implementer failed to realize that calculating derived variables like acceleration from position and velocity using a di…

I mostly learned programming GUI applications, in Xwindow and in general, studying the code of xv. The GUI controls were written from scratch using X resources and the code quality…

Well, for 'The Nine Billion Names of God' the monks finally ended up renting a computer. ;-)

It seems that common sense is very difficult to program. Perhaps because we don't really know how to properly define it or how an encoding of it would look like. All of these model…

People print guns and gun parts. More than you think. Now even more since metal printing is starting to become affordable. I print grip and grip attachments for my 9mms and my AR15…

Yet he did a lot of good leaving his money to academia and medical research. I think the Egyptians had it right. Ultimately your heart will be weighted against the feather of Ma'at…

Hmmm... So you are telling me in the age of AI you still need to hire software developers that know how to code? How ironic. ;-)

Statements like these always brings me to memory the opening line of Hamming's Numerical Methods book: The purpose of computing is insight, not numbers . It is very easy to get car…

Correct, the famous d*F=J differential form formulation with one of the versions of the Hodge operator, which I have seen named in several ways. Also depending on your definition o…

Indeed you can use symmetry, but it feels more like a mathematical hack, and the fact that it agrees with reality could be a coincidence. You can state that, and there is a lot of …

What I always miss from this introductory abridged explanations, and what makes the connection between Lie groups and algebras ('infinitesimal' groups) really useful, is that the e…

Which for some of us, Spanish speakers, was on occasion amusing or lewd, depending on the context and culture. The Spanish equivalent is 'tronco' which is very similar and it is sl…

They also mainly continued to be loyal to the Spanish crown after Argentina and Chile went through their independence, and carried out the final pacification of the Mapuche territo…

You would have thought they learned from their mistakes implementing VST2, but they doubled down going even further basing VST3 on the Windows Component Object Model. I guess it wa…

Today I drove past a new Tesla Model Y, still with a temporary paper tag. As I was passing by I immediately noticed some pretty heavy water condensation inside one of the lateral t…

https://archive.is/vKXcG

Ahh... Brings me memories. Back in the 80s I did something similar after reading Dawkin's The Blind Watchmaker and his Biomorph evolution app. I wanted to recreate it but doing som…

To be fair, any multivariable regulator or filter (estimator) that has a quadratic component (LQR/LQE) will naturally yield a solution similar to backpropagation when an iterative …

As it is stated, I always thought it came from formulations like Euler-Lagrange procedures in mechanics used in numeric methods for differential geometry. In fact when I recreated …

Things have improved. Modern water-based acrylic paints and sealers are much easier to deal with and give you similar if not better results than enamels. There are finally now some…

Well, outside of Sanborn and his collaborators, who knows. When the puzzles were first revealed and people started trying to crack them, some of them explored out of the box approa…

Probably correct. Different from the other cyphers, the number of symbols is short, and correlating part of the plaintext that has been revealed gives poor measures for the full st…