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Novinky z projektov

Commenting on Recent Issues with the server

Milkyway@Home - Št, 30.11.2023 - 00:02
Hello everyone,

I wanted to apologize for the recent server issues. The migration brought unforeseen challenges, particularly with DNS changes. As a newcomer to server management and BOINC projects, I've been on a steep learning curve to transition this project to a new server.

As mentioned in a previous post, and reiterated here, we have set up a temporary DNS entry for milkyway-new that now points to the server. The changes will take some time to become effective (I don't have a specific timeline, but I'm closely monitoring the process). This update will allow for downloading older work units linked to milkyway-new and uploading completed ones.

I'm immensely grateful to all the volunteers who have suggested fixes and assisted others with client-side issues. Your contributions have significantly accelerated problem-solving during this server migration. I can't thank you enough for your support.

To those who have voiced frustrations, I apologize for any shortcomings in my expertise. I recognize the value of the computing time you generously volunteer and understand your desire for acknowledgment of your contributions. I encourage you to continue sharing your concerns, as long as they are respectful. Destructive or derogatory comments don't contribute constructively to our project. We aim to foster a positive environment at MilkyWay@home for everyone passionate about science and distributed computing, free from unnecessary negativity.

One common concern has been the need for better communication. Despite my efforts to preemptively share updates, it appears more is needed. I would like to improve in this area. I'm considering regular updates (weekly, bi-weekly, or monthly) and would appreciate your thoughts on this. Please share your ideas in the comments on how I could improve communication.

On a related note, we are excited to announce that we're currently developing a new version of the n-body code. This upgrade will allow for the fitting of additional parameters, such as orbit parameters, along with other minor improvements. We anticipate implementing these changes in the coming weeks.
Additionally, we are making plans to reintroduce support for Mac users. More details will be provided as soon as we have further information.

Once again, I apologize for the recent issues with MilkyWay@home and am very thankful for your patience.

Best regards,
Kategórie: Novinky z projektov

A new Fermi Gamma Ray Pulsar Catalog has just been published!

Einstein@Home - Ut, 28.11.2023 - 11:59

The latest catalog of gamma-ray pulsars discovered in data from NASA's Fermi Gamma-ray Space Telescope has just been published in the Astrophysical Journal (the article is linked here).

Einstein@Home and its methods (run on a dedicated computing cluster) have contributed 53 of the 294 confirmed pulsars listed in the catalog.  Even more impressive: about half of all pulsars ever discovered via their gamma-ray pulsations have been found by our project.

read more

Kategórie: Novinky z projektov

Research update from the MCM team (November 2023)

World Community Grid - Po, 27.11.2023 - 22:37
We continue our work on characterizing lung cancer biomarkers identified in the MCM1 project. This update focuses on IL13RA1, a gene associated with lung cancer survival and differentially expressed across multiple cancer types compared to normal tissues.
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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