ComPhys @comphys@qoto.org

@mycroft@mastodon.social Not sure I'd personally self host a matrix or email server without good reason.
With email paying only a small amount every month gets me a service which is much more reliable than what I'd get with a raspberry pi on a home connection.
While I don't mind things being a bit unreliable for my own projects I can't expect others to deal with that when there are so many perfectly reliable options out there.

@HerraBRE all glory to the hypnotoad.

@HerraBRE not to mention the hypnotoad feature.

@mycroft@mastodon.social as in self-hosting?

@mycroft@mastodon.social that's cool :) matrix works really well in my experience; although it would be nice to see some more clients being made.

Starting my next post which will be about the TEM mode on a two-conductor transmission line. Specifically I'll be looking at a coaxial geometry and using #FEniCS to calculate the field distributions, the characteristic impedance and the Poynting vector. Just had a go and it all seems to be working.

While I'll focus on a coaxial geometry the method can be extended to more complicated geometries just by changing the mesh & boundaries. I've just had a go at an odd mode impedance and it came out just right!

The best thing about this post will be how easy it is.

#physics #electromagnetism #HAM #radio #Maxwell #opensource #python

@spinflip Hi, I don't have a direct answer to your question; I've never tried to do this before. However the problem makes me think of mosh ( https://mosh.org/ ) which is an ssh alternative specifically developed for intermittent connections and shoop which is an scp alternative. Perhaps these could be of use if the normal http method turns out to be difficult.

@jory Great stuff, thank you =]

\(\alpha\)

\(\LaTeX\)

Does the \LaTeX support work?

@hashtaggrammar @freemo @Surasanji @arteteco While this may be a good description of the problem, what's the solution? And is it even really a problem or will that tribalism just motivate both sides?

@criw try some different types of coffee?

I use wxmaxima as a mathematica alternative. I don't consider it to be as polished as mathematica but in general it's pretty amazing.

The syntax of sympy puts me off (too much like programming) and I find sage to be a bit too huge and clunky.

What computer algebra systems does everybody else use?

@mycroft@mastodon.social That said I've never really found osmAnd to be a good replacement for Gmaps, and I never really found anything better either.

@mycroft@mastodon.social Great stuff :) same with older laptops and Ubuntu. I installed Ubuntu on somebody's failing laptop 3 weeks ago which is now apparently totally fine. I haven't used Ubuntu for ages, I was really impressed with how usable it is for a non-techie.

3D electrostatics example using #FEniCS. In this example I solve the Laplace equation for two concentric spheres to obtain an electric potential and take the gradient to find the electric field. The results are then compared with an analytical solution.

The geometry is produced in FreeCAD and the mesh/ boundaries produced with Gmsh.

https://comphysblog.wordpress.com/2018/08/26/3d-electrostatics-using-fenics/

Please let me know if you have comments or corrections!

#physics #electromagnetism #opensource #python