2021 11 08 Open NEST Developer Video Conference

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Agenda

1. Welcome
   • NEST Conference 2022
2. Review of NEST User Mailing List
3. Project team round
4. In-depth discussion
   • PyNN and NEST 3

NEST Conference 2022

         Juni          
  So Mo Di Mi Do Fr Sa  
            1  2  3  4  
   5(?6)-7--8--9-10 11  <<<<<< LIVE HACKATHON
  12 13 14 15 16 17 18  <<< release week
  19>20-21-22-23-24<25  <<<<<<  SAVE THE DATE -- NEST Conference 2022
  26 27 28 29 30

Mailing list

• https://nest-simulator.org/mailinglist

Project team round

Here we discuss topics that need broader attention, for example questions that came up but are outside a single project's scope, larger planned changes/PRs that affect all teams or pending work that is blocked by external factors.

1. Models / NESTML
   • how to proceed with #1895 – change to extension module
   • non-linear NMDA channels, math allows to compute activation trace on the pre-synaptic side, share traces via SecondaryEvents, looking for experts.
2. PyNEST
   • nothing to report
3. Kernel
   • fixing in-memory representation of spacial information (PR in progress)
4. Installation
   • looking into new issues, some deep, some for hackathon
5. Infrastructure
   • nothing to report
6. Documentation
   • nothing to report
7. EBRAINS
   • nothing to report
8. (Feature) Automated Testing
   • nothing to report
9. (Feature) Extension Module System
   • nothing to report

In-depth discussion

PyNN and NEST 3

• NEST-3 support was merged to PyNN main branch, will become part of next release
• major point was removal of ResetNetwork() from the NEST API, now workaround by concatenating runs into one long run
  • problematic point is the leakage of information into subsequent runs
  • ResetNetwork() also did not protect against leakage of information, thus it was removed
    • manually resetting buffers, RNGs, etc. needs to be very exactly specified
  • better solution would be to run in different sub-processes