Дается краткий обзор развития глобальной грид-инфраструктуры проекта WLCG (Worldwide LHC Computing Grid или Всемирный грид для Большого адронного коллайдера). Особое внимание уделяется архитектуре распределенного хранения сверхбольших объемов данных. Дается краткая информация о проектах развития средств мониторинга и управления распределенными файловыми системами, выполненных в ОИЯИ: система мо...

I report on current activities in the domain of Collaborative Tools, focusing on development for the LHC collaborations [1] and HENP (High Energy and Nuclear Physics), in general, including audio and video conferencing, web archiving, and secure collaborative environments. This note addresses the follow-up to the LCG RTAG 12 Final Report [2] (presented at CHEP 2006 [3]), including formation of ...

Lattice tests are quality measures for assessing the intrinsic structure of pseudorandom number generators. Recently a new lattice test has been introduced by Niederreiter and Winterhof. In this paper, we present a general inequality that is satisfied by any periodic sequence. Then, we analyze the behavior of the linear congruential generators on elliptic curves (abbr. EC-LCG) under this new la...

Two competing approaches to handling complex constraints in satisfaction and optimization problems using SAT and LCG/SMT technology are: decompose the complex constraint into a set of clauses; or (theory) propagate the complex constraint using a standalone algorithm and explain the propagation. Each approach has its benefits. The decomposition approach is prone to an explosion in size to repres...