Dear NEST Users & Developers!
I would like to invite you to our next fortnightly Open NEST Developer Video Conference, today
Monday 16 August, 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/2021-08-16-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
Hi Itaru,
The problem we had with std::vector was how it allocates memory. When the memory allocated for a vector is full, its capacity is increased by allocating a bigger chunk of memory (commonly with double the capacity of the original vector), and all elements are moved to the new allocation.
We observed that when connections are all put in one big vector, and the number of connections in the vector becomes large, memory consumption from vector growth becomes problematic. We therefore created a new container, BlockVector, to keep memory consumption under control and avoid moving the elements when increasing the capacity. The BlockVector achieves this by allocating an entire block of a fixed size every time the capacity has to be increased. The BlockVector therefore becomes a vector of vectors, where the entire size of each new block, which is a new vector in the vector of vectors, is allocated only once when the block is created.
Some benchmarks were done during the review of the PR,
https://github.com/nest/nest-simulator/pull/1047
You can find the benchmarks here:
https://github.com/nest/nest-simulator/files/2505835/Bench_214_sq_db70dcc1e…
Note that BlockVector was called "Seque" at the time.
Best,
Håkon
________________________________
From: Itaru Kitayama <itaru.kitayama(a)gmail.com>
Sent: 10 August 2021 05:51
To: NEST User Mailing List <users(a)nest-simulator.org>
Subject: [NEST Users] libnestutil BlockVector Implementation
Hello Håkon,
As you implemented, an instance of BlockVector is a vector of vectors but
allows users to specify with one index. As I am having a few problems with
mapping BlockVetors to the device memory, I am simply wondering as to
why we can't just use std::vector< value_type >? If you guys observed
significant performance improvements with BlockVectors in the past,
would you mind pointing me to the papers or notes?
Thanks,
Itaru.
_______________________________________________
NEST Users mailing list -- users(a)nest-simulator.org
To unsubscribe send an email to users-leave(a)nest-simulator.org
To whom it may concern,
I am writing regarding the problem with giving my topology network noise
after simulation with the signal. The network is oscillating with noise
generator which is created as single layer which provides noise for other
nodes (which consist of layers). I stimulate my network with stronger
signal(another different layer) and after the simulation the Nodes stop
reacting to the noise input and become stuck on refresh Voltage and its
for longer periods than refractory period.
The model is derivation of Hill-Tononi example network.
The Nest is running on Ubuntu 20.04 , Conda/Spyder The nest is version
v2.20.1
To visualize the problem here are the images which illustrate the problem
[image: image.png]
[image: image.png]
Here is the snippet of the code with the connections and layer setups
Best regards
Bc. Filip Blaštík
Hi,
If Tiziano who wrote the code could enlighten me on understanding further of the
code that'd be great, but in case he left already could the Community
can jump in?;
The "chunks" are clearly dedicated to Nodes, but I wonder if there are
cases chunks are used for other objects?
Thanks,
Itaru.
Dear NEST Users & Developers!
I would like to invite you to our next fortnightly Open NEST Developer Video Conference, today
Monday 19 July, 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
* In depth: Running inside Docker on Piz Daint
The agenda for this meeting is also available online, see https://github.com/nest/nest-simulator/wiki/2021-07-19-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
Dear NEST Users & Developers!
I would like to invite you to our next fortnightly Open NEST Developer
Video Conference, today
Monday 5 July, 11.30-12.30 CEST (UTC+2).
As there is the CNS Conference ongoing and many may be in a New York
timezone we'll try to keep it short.
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/2021-07-05-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
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
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
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>
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
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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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