June 2021 - NEST Users - NEST Initiative Mail

Changing connection weight according to a function

by Ryan Rahy

Dear all, I am trying to build a network where one of the connection weights changes according to a given function. I'm specifically looking for a step function, such that the weight would stay constant at a negative value until a given time point, where it would suddenly change to positive value. As far as I can tell, the existing synaptic models with plasticity cannot do this. I'm trying to do this in order to model a rebound effect, where a neuron fires after being released form an inhibitory current. This effect takes place over a time scale of seconds in the circuit I'm studying, so using an existing model with built-in GABA-mediated rebound doesn't do the trick. So is there a way to manually change a connection weight during the simulation? If not, is there some other way I could achieve the same effect in NEST? Thanks in advance! Best, Ryan

3 years, 3 months

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Open NEST Developer Video Conference Monday 21 June 2021 11:30 CEST (UTC+2)

by Dennis Terhorst

Dear NEST Users & Developers! I would like to invite you to our next fortnightly Open NEST Developer Video Conference, today Monday 21 June, 11.30-12.30 CEST (UTC+2). As usual, in the Project team round, a contact person of each team will give a short statement summarizing ongoing work in the team and 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. Agenda Welcome Review of NEST User Mailing List Project team round The agenda for this meeting is also available online, see https://github.com/nest/nest-simulator/wiki/2021-06-21-Open-NEST-Developer-… Looking forward to seeing you soon! best, Dennis Terhorst ------------------ Log-in information ------------------ We use a virtual conference room provided by DFN (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 * 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 - 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

3 years, 3 months

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NEST wheels

by Robin Gilbert De Schepper

Hi all! NEST is pip installable! I'd like to collect some feedback on #2073 <https://github.com/nest/nest-simulator/pull/2073> so anyone that is interested to try out a (temporary) pip installed NEST can try `pip install nest-on-square-wheels`. It takes as long as a regular NEST install so it can take a while to finish. In case of errors the error message is usually buried in quite a big red blob of pip mumbo jumbo, but other than that it should be a nice hands-off experience :) You can build with MPI: > pip install nest-on-square-wheels --install-option="--mpi=ON" and control the amount of CMake jobs if it makes your machine stall: > pip install nest-on-square-wheels --install-option="--mpi=ON" --install-option="--jobs=2" All feedback is welcome on the PR, these temporary `nest-on-square-wheels` will be removed in the near future so obviously don't count on them in any scripts or package lists. -- Robin De Schepper, MSc Department of Brain and Behavioral Sciences Unit of Neurophysiology University of Pavia, Italy Via Forlanini 6, 27100 Pavia - Italy Tel: (+39) 038298-7607 http://www-5.unipv.it/dangelo/ Interested in network modelling? Discover our framework <https://github.com/dbbs-lab/bsb>: <https://github.com/dbbs-lab/bsb>

3 years, 3 months

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NEST Conference 2021 - register by June 21!

by Anne Elfgen

Dear all, Just a little reminder that the registration deadline for the NEST Conference 2021 is on Monday next week, June 21. More information on the programme and how to register can be found on the conference website https://nest-simulator.org/conference This year's conference will again take place as a virtual conference on Monday/Tuesday 28/29 June 2021 followed by a virtual NEST User Hackathon until Friday 2 July. The NEST Conference provides an opportunity for the NEST Community to meet, exchange success stories, swap advice, learn about current developments in and around NEST spiking network simulation and its application. We are looking forward to seeing you all! Hans Ekkehard Plesser & many more --------------------- * Registration fee for non-members: 50 CHF Registration fee for NEST Initiative members: 20 CHF Annual NI membership fee: 25 CHF ------------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------------ Forschungszentrum Juelich GmbH 52425 Juelich Sitz der Gesellschaft: Juelich Eingetragen im Handelsregister des Amtsgerichts Dueren Nr. HR B 3498 Vorsitzender des Aufsichtsrats: MinDir Volker Rieke Geschaeftsfuehrung: Prof. Dr.-Ing. Wolfgang Marquardt (Vorsitzender), Karsten Beneke (stellv. Vorsitzender), Prof. Dr.-Ing. Harald Bolt, Dr. Astrid Lambrecht, Prof. Dr. Frauke Melchior ------------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------------

3 years, 3 months

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Sharing code that runs with an altered model of NEST

by Julia Gallinaro

Dear NEST Community, I have performed a small alteration on one model of NEST for a project I am working on (It is a minor alteration: I included a minimum hard bound for weights in the triplet STDP rule). I now want to share the code for this project, and would like to know what is the best approach for doing this. Should I provide my copy of the altered model file together with my project scripts? Or is there another way of doing it, which is more appropriate? I am sorry if that is a basic question, but it is the first time I change something on NEST code for a project. Best, Júlia

3 years, 3 months

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NEST 3.0 Release Party (now!) 🥳

by Jochen Martin Eppler

Dear NEST users and developers! Finally, the wait is over: we have just created the NEST 3.0 release<https://doi.org/10.5281/zenodo.4739103>. Yay! A more formal announcement will follow tomorrow, but for now, it is time to party! Stop whatever you do right now, grab a drink and join us at https://conf.dfn.de/webapp/conference/97938800! Best regards, Jochen & Dennis (on behalf of the whole NEST team) -- Dr. Jochen Martin Eppler Phone: +49(2461)61-96653 ---------------------------------- Simulation Laboratory Neuroscience Jülich Supercomputing Centre Institute for Advanced Simulation ------------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------------ Forschungszentrum Juelich GmbH 52425 Juelich Sitz der Gesellschaft: Juelich Eingetragen im Handelsregister des Amtsgerichts Dueren Nr. HR B 3498 Vorsitzender des Aufsichtsrats: MinDir Volker Rieke Geschaeftsfuehrung: Prof. Dr.-Ing. Wolfgang Marquardt (Vorsitzender), Karsten Beneke (stellv. Vorsitzender), Prof. Dr.-Ing. Harald Bolt, Dr. Astrid Lambrecht, Prof. Dr. Frauke Melchior ------------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------------

3 years, 3 months

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Open NEST Developer Video Conference Monday 7 June 2021 11:30 CEST (UTC+2)

by Dennis Terhorst

Dear NEST Users & Developers! I would like to invite you to our next fortnightly Open NEST Developer Video Conference, today Monday 07 June, 11.30-12.30 CEST (UTC+2). As usual, in the Project team round, a contact person of each team will give a short statement summarizing ongoing work in the team and 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. Agenda Welcome Review of NEST User Mailing List Project team round The agenda for this meeting is also available online, see https://github.com/nest/nest-simulator/wiki/2021-06-07-Open-NEST-Developer-… Looking forward to seeing you soon! best, Dennis Terhorst ------------------ Log-in information ------------------ We use a virtual conference room provided by DFN (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 * 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 - 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

3 years, 4 months

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NEST Users June 2021