Magnetism@home

[PavolR]

Uz je to vidiet: Numlock a Rottenkiwi vdaka. Vykon nasho tymu sa zvysil. Samozrejme, ze nemozem zabudnut ani na ostatnych ktori su aktivne pripojeni k tomuto projektu: gabberattak, Hefto99, Lacko-Michalovce... a dalej vitame noveho clena na tomto projekte: tahanko, uz si pripisal prve kredity.

Super, a kto sa este prida?

[Palo M.]

Chlapi, ja by som sa pridal. FAKT by som sa pridal. Ale ked ja o tom projekte nic neviem...
Pozeram na http://boinc.jadro.org/projekty a tam taky projekt vobec nefiguruje.

Ako... su tu 4 stranky nejakych postov na fore, to ano. Ale pre mna, ako zaciatocnika co o tom nic nevie, to nie je atraktivne, prehrnat sa starymi hlaskami na fore. Kredity ma az tak neinteresuju a aj tak by som ich iba presunul z inych projektov, takze v globale by to bolo aj pre tim priblizne to iste. Mohol by som o tom samozrejme nieco zistit sam priamo na projektovej stranke, ale sa mi nechce. Teda, vlastne... nemam cas... som chcel povedat.

[numlock]

Projekt sa zaobera vyskumom rovnovaznych, metastabilnych a prechodnych magnetizacnych modelov. Momentalne sa skumaju magneticke prvky a ich polia vo velkosti nanometrov, neskor sa budu mozno skumat aj ine systemy.

Magnetism@home má najbližšie asi ku Spinhenge@home, obidva sa zameriavaju na nano-magnetizmus (ajkeď odlišnými spôsobmi).

Just about everything is different, from objects of research to the employed approaches. Spinhenge is about molecules, consisting of a few (dozens) discrete spins. Here the objects are soft ferromagnetic nano-particles of hundreds of millions of atoms. The approaches are also different. Spinhenge uses direct numerical simulation (numerical experiment) to solve the forward problem of evolution of the system. Here we do not simulate the evolution of the system directly, but just map its potential as a function of several scalar parameters of the theory (generalized coordinates). Having the potential calculated (for a particular shape, like circular cylinder) allows to solve infinite set of forward problems (asking for the state in a particular geometry) and inverse problems (asking for a set of geometries, supporting particular magnetic states).

That is, one our mapped potential \"contains within itself\" an infinite number of direct simulations for different particle sizes, aspect ratios, materials, etc. All in just one file. There are, of course, approximations in the theory, allowing for such a high compression, but they were working quite well so far and pushing them to the limit is also a goal of our project.

Ešte jeden link.. TWiki's Magnetism web

[Kiwi]

A este to zere RAM jak svina, 322 MB per WU. 322 x 4 = 1.3 GB, resp. 322 x 8 = 2.6 GB,
tak ked ma niekto novu masinu s 8-mimi vlaknami a 3 GB RAM, tak asi vela nenapocita.
A 12 GB DDR3 uz nieco stoji, dokonca teraz aj DDR2 podrazeli a ja som lacne nekupil.

[Kiwi]

Preco Magnetism bezi na virtualizovanom 32-bit stroji 1.77-krat rychlejsie, ako na tom istom
fyz. CPU ale v 64-bit OS, v ktorom bezi ten virtualny stroj ?

[gabberattack]

To je zaujimave. Postni to na forum projektu.

[Kiwi]

Tu je 64-bit Ubuntu: http://kinetic.dnsalias.org/magnetism/r ... ostid=8092
A tu 32-bit Virtual: http://kinetic.dnsalias.org/magnetism/r ... ostid=9594

[gabberattack]

Ok, dal som otazku na forum - tiez ma to zaujima.

[Kiwi]

Tak mame aj odpoved. Vo VM je zle interpretovany cas.
Ako mam teda nastvit ziskavanie casu z NTP vo VM stroji ?

Este by sme potrebovali 2 Quady a mame 5. miesto za 2 mesiace. Let's go !

[Palo M.]

Tak konecne pribudol aj popis tohoto projektu na stranke... Take nieco som mal na mysli. Tak sa teda skusim zapojit, hned ako nainstalujem novu masinu.

Mam taky pocit, ze mesto sa do slovenciny prepisuje ako Doneck... Skupina ts je pre anglanov a podobne hovoriacich, ktori nemaju normalne C... tak musia mat tsunami, tsuki a Donetsk...

[gabberattack]

S tym Doneckom mas pravdu - prepis to tam, prosim.
EDIT
A ked uz budes prepisvat, prepis tam aj toto:
(hlavne nanometrickymi magnetickymi prvkami a ich polami / poliami ? nemysli mi to dnes, navyse ked som to pisal, tak som mal oci asi niekde na stolicke. Ma tam byt mnozne cislo.

[Hefto99]

Updated.

[gabberattack]

Dik za update, dnes som bl cely den mimo a pisem tu somariny.

[PavolR]

Ahoj tak som presiel na MilkyWay@home, aby som otestoval optimalizacie.

[Juvs]

Clenov GPUGridu to tesi. Bobehneme a predbehneme Magnetakov .