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Open NEST Developer Video Conference Monday 21 June 2021 11:30 CEST (UTC+2)
by Dennis Terhorst 21 Jun '21

21 Jun '21

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

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NEST wheels
by Robin Gilbert De Schepper 15 Jun '21

15 Jun '21

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>

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NEST Conference 2021 - register by June 21!
by Anne Elfgen 14 Jun '21

14 Jun '21

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 ------------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------------

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Sharing code that runs with an altered model of NEST
by Julia Gallinaro 14 Jun '21

14 Jun '21

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

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NEST 3.0 Release Party (now!) 🥳
by Jochen Martin Eppler 11 Jun '21

11 Jun '21

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 ------------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------------

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Open NEST Developer Video Conference Monday 7 June 2021 11:30 CEST (UTC+2)
by Dennis Terhorst 07 Jun '21

07 Jun '21

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

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Summary of changes to handling of Node collections
by Itaru Kitayama 27 May '21

27 May '21

Hi, Can someone point me to the summary of changes other than git log so I can understand better the changes introduced for the NEST-3 releases? Thanks, Itaru.

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NEST Conference 2021 abstract submission deadline extended
by Anne Elfgen 17 May '21

17 May '21

Dear all, The *abstract submission deadline* for the (virtual) *NEST Conference 2021 **has been extended* to Wednesday, *26 May*. We are still looking forward to your contributions! 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. 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. We are inviting contributions to the conference, including plenary talks, "posters", breakout sessions and workshops on specific topics. *Important dates* *16 May*2021 — Deadline for NEST Initiative Membership applications *26 May*2021 — Deadline for submission of contributions *08 June*2021 — Notification of acceptance *21 June*2021 — Registration deadline *28 June*2021 — NEST Conference 2021 starts For more information on how to submit your contribution, register and participate, please visit the conference website *https://nest-simulator.org/conference* <https://nest-simulator.org/conference> We are looking forward to seeing you all in June! Hans Ekkehard Plesser, Dennis Terhorst, Anne Elfgen & many more --------------------- * Registration fee for non-members: 50 CHF Registration fee for NEST Initiative members: 20 CHF Annual NI membership fee: 25 CHF

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Re: Stop hanging simulations
by Hans Ekkehard Plesser 10 May '21

10 May '21

Hi Tom, As a DIY workaround, you can use the RunManager context to simulate in small steps and break if it gets too slow. I haven't tested the code, just sketching from memory. Instead of calling nest.Simulate(1000), use with nest.RunManager(): for _ in range(100): t = time.time() nest.Run(10) if time.time() - t > 5: break The logic is as follows: You split the 1000 ms into 100 times 10 ms. This is fast with Run() within the RunManager(). You then use Python's time to see how long it takes to simulate 10 ms and break if it takes too long, here a 5 s limit. You can then use GetKernelStatus to get the current time in the simulation. It would be interesting to add this as a kernel feature. Let me know if it works! Best, Hans Ekkehard -- Prof. Dr. Hans Ekkehard Plesser Head, Department of Data Science Faculty of Science and Technology Norwegian University of Life Sciences PO Box 5003, 1432 Aas, Norway Phone +47 6723 1560 Email hans.ekkehard.plesser(a)nmbu.no<mailto:hans.ekkehard.plesser@nmbu.no> Home http://arken.nmbu.no/~plesser On 06/05/2021, 16:08, "TOM BUGNON" <bugnon(a)wisc.edu<mailto:bugnon@wisc.edu>> wrote: Hi all, Under some circumstances simulations can slow down up to the point where the nest.Simulate() does not advance anymore and stays stuck at a given virtual time, with a "realtime factor" of 0. I suppose this can happen for instance when a network falls into a regime of runaway excitation in which a massive number of spikes are being exchanged. I'm looking for a way to stop the simulation in such a case, (say when the realtime factor goes below a set threshold, or when the output files are not updated for a certain duration), ideally in such a way that the program can continue running rather than crashing. If anyone has a suggestion about how to go around this issue I'd be happy to hear it. Thanks in advance! Best, Tom

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Open NEST Developer Video Conference Monday 10 May 2021 11:30 CEST (UTC+2)
by Dennis Terhorst 10 May '21

10 May '21

Dear NEST Users & Developers! I would like to invite you to our next fortnightly Open NEST Developer Video Conference, today Monday 10 May, 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. Today we would have a deeper look on CI/testing in the current GitHub-Actions context and STDP models in particular. Agenda Welcome Review of NEST User Mailing List Project team round In-depth discussion * Interactively debugging GitHub Actions <https://github.com/nest/nest-simulator/actions> failures * Discussion of STDP synapse unit testing #1840 <https://github.com/nest/nest-simulator/pull/1840> The agenda for this meeting is also available online, see https://github.com/nest/nest-simulator/wiki/2021-05-10-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

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