office hours tomorrow at 14 CEST

[Axel Brandenburg]

Hi all,
The next Pencil Code office hours will be tomorrow at 14:00 CEST; see

https://norlx65.nordita.org/~brandenb/pencil-code/office_hours/

Note the unusual time and day!!
Axel

PS: and remember the solicitation of contributions to the next Pencil
Code Newsletter to initiate an open discussion about the Pencil Code
philosophy; see below!

On Mon, May 12, 2025 at 01:53:17PM +0000, Axel Brandenburg wrote:
> Dear all,
> This is a solicitation of contributions to the next Pencil Code
> Newsletter to initiate an open discussion about the Pencil Code
> philosophy. Currently, it entails a low threshold of accepting
> contributions and changes to the code, and the tendency of accepting
> most changes directly into the main branch.
>
> The need for such a discussion is motivated by recent views from
> the community that the handling of changes is too lax and that it is
> advantageous to make changes first on a separate branch and then merge
> them with the main branch once the development is completed. This
> has to be weighed against the view that the code might diverge into
> many subversion. There can clearly be many other arguments in favor
> or against changing the current Pencil Code philosophy. We hope that
> with more carefully developed arguments and reports from the community,
> a more thorough assessment can be made.
>
> Your text will be published in the next newsletter as a contribution
> under your name. As all previous newsletters, this one will be published
> on GitHub; see
>
> https://github.com/pencil-code/website/tree/master/NewsLetters
>
> As usual, all contributions will be reviewed and potential changes will
> be made by the editors in consultation with the authors.
>
> The deadline for contributions is Friday, 23 May. However, if any of
> you can't make this deadline, please let us know in advance. Obviously,
> the content is important, not the exact timing.
> Cheers, Matthias & Axel
>
> --
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[Axel Brandenburg]

This is in 40 min. We'll be on:

https://stockholmuniversity.zoom.us/j/69160607217

as usual.
Axel

> To view this discussion visit https://groups.google.com/d/msgid/pencil-code-discuss/aCwv0MAJ4kHCgkJ5%40nl6.

[Matthias Rheinhardt]

Wie kann  (l. 949 ff)

!

!  extra term when Doppler shift

!

        if (ldoppler_rad) then

!

!  Q derivative term.

!

          dQdtau_m=(Qrad(l,m,n)-Qrad(l-lrad,m-mrad,n-nrad))/dtau_m

          dQdtau_p=(Qrad(l+lrad,m+mrad,n+nrad)-Qrad(l,m,n))/dtau_p

i. allg. richtig sein, da Qrad(l+lrad,m+mrad,n+nrad) z.B. für achsenparallele rays

noch gar nicht berechnet ist?

M.