ComPhys @comphys@qoto.org

@freemo I'm usually an open source fan, but nothing comes close to sublime text. It is similar to atom, but its a native application and so speedy; you'll never want to touch an electron editor again.

@freemo @M0YNG Indeed, so I suppose the original post was valid. Even in academic environments I hear people say "books? I don't use books I use google" it's something that concerns me, so I suppose I jumped to make it about that.

@freemo @M0YNG Papers are generally expensive if you aren't at an academic institute and they are also not a great place to learn a new topic. I often find technical information on places like wikipedia either totally inaccessible or so simple its unusable.

Honestly I don't think I've seen anything that comes close to replacing a good textbook. The information is probably all there on the internet, but not nearly as accessible or curated.

@freemo @mngrif @Rovine @angelobottone @snder @koyu@koyu.space @Curator @rvlobato @pschwede @TheGnuMaster @adrianomaini

Thanks =]

I will eventually make my dipole magnet post.

Just made a short post about how to simulate electrostatic nonuniform charge density distributions with FEniCS; that is spatially varying charge density distributions. This could be useful for simulating things like particle beams which are commonly assumed to have Gaussian (or similar) distributions. This is a small extension of a previous post about how to simulate uniform charge density distributions.

https://wordpress.com/post/comphysblog.wordpress.com/988

#fenics #physics #opensource #python #ham

@Rovine you could use node if you've already looked at JavaScript.

@freemo works for me too now, thank you very much :)

@freemo I'm getting a gitlab 404 on video.qoto.org I'm afraid.

@mngrif nim is pretty interesting, you write something with a python-like syntax but its converted to c and compiled.

@freemo @freemo I'll sign up & upload my geometry making videos here, the instance I used originally has been down for a while now.

@Rovine well my aim isn't really to learn about blogging platforms so I wouldn't try anything too experimental, although I would consider a self hosted WordPress blog. Do you have a preferred host?

@Rovine @freemo I do this for physics and maths, if I want to learn a new subject I essentially copy a whole chapter out by hand. I often derive the results rigorously though, where books just quote an answer and I attempt some problems. I have found this to be very effective.

@freemo When I first saw this all I could think was "this is why nobody uses the divide symbol", all ambiguity disappears when it's written as a fraction.

@mycroft@mastodon.social I suppose in some areas of education its necessary, I'm coming from a physics & math background.

@mycroft@mastodon.social I wish people wouldn't use PowerPoint for teaching, I understand that its easier for teachers but I find it very unhelpful for actually learning.

@piggo Which of these features is Firefox lacking?

@Trillenial With a $50 telescope you can see other planets, all of them are clearly circular, what does he say about that? Its just a coincidence that they all happen to be showing their flat face to the earth?

I got magnetostatic simulations working yesterday, so I made a cos(theta) style dipole magnet with an iron yoke. The fields looked sensible although I didnt check the amplitudes, for the post I'll see if I can recreate the LHC dipoles!

My latest post is about using boundary conditions to assume symmetry in a finite element electrostatics problem.

To demonstrate Neumann boundaries I solve the Laplace equation for a coaxial geometry using 1/4 of the cross section. I then find the fields of a differential pair transmission line using half the cross section and a Dirichlet boundary.

This is all done with FEniCS, the open source finite element solver. #physics #python #opensource #ham #radio​ #fenics

https://comphysblog.wordpress.com/2019/07/15/assuming-symmetry-with-boundary-conditions/​​