Dear NEST Users & Developers!
I would like to invite you to our next fortnightly Open NEST Developer Video Conference today
*Monday July 15, at 11:30 CEST (UTC+0200).*
As usual, in the Project team round, a contact person of each team will give a short statement summarizing ongoing and planned work in the team and highlight cross-cutting points that need discussion among the teams. The remainder of the meeting we would go into a more in-depth discussion of topics that came up on the mailing list or that are suggested by the teams.
Feel free to join the meeting also if it’s just to bring your own quick questions for direct discussion in the in-depth section.
Agenda
* Welcome * Review of NEST User Mailing List * Project team round * In-depth discussion
The agenda for this meeting is also available online, see https://github.com/nest/nest-simulator/wiki/2024-07-15-Open-NEST-Developer-V... https://github.com/nest/nest-simulator/wiki/2024-07-15-Open-NEST-Developer-Video-Conference
Looking forward to seeing you soon!
Cheers,
Dennis Terhorst
Log-in information
We use a virtual conference room provided by DFN https://www.dfn.de/en/ (Deutsches Forschungsnetz).
You can use the web client to connect. We however encourage everyone to use a headset for better audio quality or even a proper video conferencing system (see below) or software when available.
Web client
* Visit https://conf.dfn.de/webapp/conference/97938800 https://conf.dfn.de/webapp/conference/97938800 * Enter your name and allow your browser to use camera and microphone * The conference does not need a PIN to join, just click join and you’re in.
In case you see a dfnconf logo and the phrase “Auf den Meetingveranstalter warten”, just be patient, the meeting host needs to join first (a voice will tell you).
VC system/software
How to log in with a video conferencing system, depends on you VC system or software.
* Using the H.323 protocol (eg Polycom): |vc.dfn.net##97938800| or |194.95.240.2##97938800| * Using the SIP protocol:97938800@vc.dfn.de mailto:97938800@vc.dfn.de * By telephone: |+49-30-200-97938800|
For those who do not have a video conference system or suitable software, Polycom provides a pretty good free app for iOS and Android, so you can join from your tablet (Polycom RealPresence Mobile, available from AppStore/PlayStore). Note that firewalls may interfere with videoconferencing in various and sometimes confusing ways.
For more technical information on logging in from various VC systems, please see
http://vcc.zih.tu-dresden.de/index.php?linkid=1.1.3.4 http://vcc.zih.tu-dresden.de/index.php?linkid=1.1.3.4
Dear Thanh Binh To,
Thanks for your interest in trying the structural plasticity functionality in NEST.
For the first point, the Poisson generator in NEST produces a unique spike train for each of its targets. You can find more about the details of the Poisson generator here: https://nest-simulator.readthedocs.io/en/stable/models/poisson_generator.htm...
About points 2 and 3, at the beginning of the simulation there are no connections in this network, the connections are generated as time goes by and compatible synaptic elements become available in the different populations. For more details on this implementation please look at: https://www.frontiersin.org/journals/neuroanatomy/articles/10.3389/fnana.201...
I hope this was helpful. If you have any further questions please feel free to reach out.
All the best,
Sandra
On 24.07.24 16:59, Thanh Binh To wrote:
Dear all, in this example for structural plasticity with synaptic element, the network has
- 2 spiking populations of StructuralPlasticityNode: one for
excitation (size Nexc) and the other for inhibition (size Ninh) self.nodes_e = nest.Create('iaf_psc_alpha', self.number_excitatory_neurons, {'synaptic_elements': synaptic_elements}) self.nodes_i = nest.Create('iaf_psc_alpha', self.number_inhibitory_neurons, {'synaptic_elements': synaptic_elements_i})
- and 1 Poisson generator for creating a noise spike, that is sent to
all neurons. noise = nest.Create('poisson_generator') nest.Connect(noise, self.nodes_e, 'all_to_all', {'weight': self.psc_ext, 'delay': 1.0}) nest.Connect(noise, self.nodes_i, 'all_to_all', {'weight': self.psc_ext, 'delay': 1.0}) Could someone explain me follows:
- I understood that at time T, poisson Generator generates one spike.
If correct, all neurons receive this spike at the same time instance, ans it makes no sense! I do not know if poisson generator generates some spikes and sends them to randomly chosen neurons? 2. How the connection pattern between nodes_e and nodes_i at the beginning? 3. How the neuron connection pattern within nodes_e and within nodes_i at the beginning? Is there any reference paper or documentation about the concept of structural plasticity with synaptic element, that is implemented in NEST? Thank you very much for help. With kind regards Mit freundlichen Grüßen
Thanh Binh To
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Dennis Terhorst -
Sandra Diaz -
Thanh Binh To