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Power Outage Saturday October 7th

MindModeling@Home - Ut, 09.10.2018 - 15:25
Hey Everyone,

There was an unplanned power outage that caused MindModeling.org to go offline for a few days.

We are working to bring everything back online as soon as possible.

Thank you for your patience and we hope to have everything back up and running soon.

Best,

Brandon
Kategórie: Novinky z projektov

Perfect Cuboid sources

yoyo@home - So, 06.10.2018 - 00:00
The 3rd batch is closed to the end and Perfect Cuboid publishes the sources on https://github.com/renyxadarox/pcuboid. Everyone who is interested to take a part in the public code review, please join us! You can comment the code on github, here in the forum or join the Telegram group https://t.me/joinchat/BrFEbg7IlqMFl4PBRSdEBA for interactive discussion.
Kategórie: Novinky z projektov

Restricted access to statistics files

PrimeGrid - Pi, 05.10.2018 - 18:02
Beginning October 12th, one week from today, access to the statistics files exported by PrimeGrid will be restricted to authorised statistics sites and other authorised users. We're still working on the final plan, but if you are currently using our statistics files, please contact me either on the forums, by private message, or at the email address listed on our contacts page. Michael Goetz
Kategórie: Novinky z projektov

Database Maintenance 10-4-2018 Complete

Milkyway@Home - Pi, 05.10.2018 - 04:14
The database is back up. There will be some extra validation as the feeder and transitioner catch up with the incoming work units. We will continue to monitor the status of the server.
Kategórie: Novinky z projektov

Outsmart Ebola Together Ends Current Phase of Work to Process Data, Look for Additional Collaborators

World Community Grid - St, 03.10.2018 - 19:50
The Outsmart Ebola Together research team is moving on to the data analysis phase of the project. Read more in this message from principal investigator Dr. Erica Ollmann Saphire.
Kategórie: Novinky z projektov

Database Maintenance 10-4-2018

Milkyway@Home - Ut, 02.10.2018 - 22:39
We will be working on the database on 10-4-2018. The database will be shut down around 12 pm EST, of 10-4-2018.

We expect to be down for no more than 24 hours.
Kategórie: Novinky z projektov

Nbody release v1.72

Milkyway@Home - Pi, 28.09.2018 - 02:07
Hey All,
I just released version 1.72 of nbody for linux and windows. Mac to follow soon. I have also put up some new runs. Please let me know if there are any issues.

Thank you for your continued support,
Sidd
Kategórie: Novinky z projektov

Thanks for supporting SixTrack at LHC@Home and updates

LHC@home - Ut, 23.01.2018 - 19:08
Dear volunteers,

All members of the SixTrack team would like to thank each of you for supporting our project at LHC@Home. The last weeks saw a significant increase in work load, and your constant help did not pause even during the Christmas holidays, which is something that we really appreciate!

As you know, we are interested in simulating the dynamics of the beam in ultra-relativistic storage rings, like the LHC. As in other fields of physics, the dynamics is complex, and it can be decomposed into a linear and a non-linear part. The former allows the expected performance of the machine to be at reach, whereas the latter might dramatically affect the stability of the circulating beam. While the former can be analysed with the computing power of a laptop, the latter requires BOINC, and hence you! In fact, we perform very large scans of parameter spaces to see how non-linearities affect the motion of beam particles in different regions of the beam phase space and for different values of key machine parameters. Our main observable is the dynamic aperture (DA), i.e. the boundary between stable, i.e. bounded, and unstable, i.e., unbounded, motion of particles.

The studies mainly target the LHC and its upgrade in luminosity, the so-called HL-LHC. Thanks to this new accelerator, by ~2035, the LHC will be able to deliver to experiments x10 more data than what is foreseen in the first 10/15y of operation of LHC in a comparable time. We are in full swing in designing the upgraded machine, and the present operation of the LHC is a unique occasion to benchmark our models and simulation results. The deep knowledge of the DA of the LHC is essential to properly tune the working point of the HL-LHC.

If you have crunched simulations named "workspace1_hl13_collision_scan_*" (Frederik), then you have helped us in mapping the effects of unavoidable magnetic errors expected from the new hardware of the HL-LHC on dynamic aperture, and identify the best working point of the machine and correction strategies. Tasks named like "w2_hllhc10_sqz700_Qinj_chr20_w2*" (Yuri) focus the attention onto the magnets responsible for squeezing the beams before colliding them; due to their prominent role, these magnets, very few in number, have such a big impact on the non-linear dynamics that the knobs controlling the linear part of the machine can offer relevant remedial strategies.

Many recent tasks are aimed at relating the beam lifetime to the dynamic aperture. The beam lifetime is a measured quantity that tells us how long the beams are going to stay in the machine, based on the current rate of losses. A theoretical model relating beam lifetime and dynamic aperture was developed; a large simulation campaign has started, to benchmark the model against plenty of measurements taken with the LHC in the past three years. One set of studies, named "w16_ats2017_b2_qp_0_ats2017_b2_QP_0_IOCT_0" (Pascal), considers as main source of non-linearities the unavoidable multipolar errors of the magnets, whereas tasks named as "LHC_2015*" (Javier) take into account the parasitic encounters nearby the collision points, i.e. the so called "long-range beam-beam effects".

One of our users (Ewen) is carrying out two studies thanks to your help. In 2017 DA was directly measured for the first time in the LHC at top energy, and nonlinear magnets on either side of ATLAS and CMS experiments were used to vary the DA. He wants to see how well the simulated DA compares to these measurements. The second study seeks to look systematically at how the time dependence of DA in simulation depends on the strength of linear transverse coupling, and the way it is generated in the machine. In fact, some previous simulations and measurements at injection energy have indicated that linear coupling between the horizontal and vertical planes can have a large impact on how the dynamic aperture evolves over time.

In all this, your help is fundamental, since you let us carry out the simulations and studies we are interested in, running the tasks we submit to BOINC. Hence, the warmest "thank you" to you all!
Happy crunching to everyone, and stay tuned!

Alessio and Massimo, for the LHC SixTrack team.
Kategórie: Novinky z projektov

LHC@home down-time due to system updates

LHC@home - Ut, 23.01.2018 - 11:19
Tomorrow Wednesday 24/1, the LHC@home servers will be unavailable for a short period while our storage backend is taken down for a system update.

Today, Tuesday 23/1, some of the Condor servers that handle CMS, LHCb and Theory tasks will be down for a while. Regarding the on-going issues with upload of files, please refer to this thread.

Thanks for your understanding and happy crunching!
Kategórie: Novinky z projektov
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