2022 11 21 Open NEST Developer Video Conference

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Agenda

1. Welcome
2. Review of NEST User Mailing List
3. Project team round
4. In-depth discussion
   • An idea concerning Tsodyks-style synapses

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
   • no updates, work as usual
   • see also in-depth discussion below
2. NEST GPU
   • nothing to report, work as usual
3. PyNEST
   • working on wheel installation
   • porting tests from SLI to C++ or Python
     • clean-up test style to modern mechanisms
4. NEST Desktop
   • no report
5. Kernel
   • nothing to report, work as usual
6. Installation
   • spontaneous mini-hackathon on Spack install last Friday
7. Infrastructure
   • HPC centers working on EBRAINS software deployment
8. Documentation
   • work as ususal
9. EBRAINS
   • Two HBP Summit 2023 satellite events planned

In-depth discussion

An idea concerning Tsodyks-style synapses

Presentation of Concept

• dynamics of $x, y, z, u$ are exclusively determined by pre-synaptic neuron
• could possibly reduce synaptic integration effort by the fan-out factor, possibly $O(10k)$, since only needs to be done once
• would require special "tsodyks"-variant of source neuron model
• additional variable to communicate could use float offset parameter for testing
  • more general and much cleaner way would be to allow for a data payload in spike events

Discussion

• could be similar to Urbanczyk-Senn and Clopath updates
• need looking into specific (source) neuron models
• Comments and ideas appreciated!