Three dimensional Lifshitz black hole and the Korteweg-de Vries equation

We consider a solution of three dimensional New Massive Gravity with a negative cosmological constant and use the AdS/CTF correspondence to inquire about the equivalent two dimensional model at the boundary. We conclude that there should be a close relation with the Korteweg-de Vries equation.Comment: 4 page

Experience with the Open Source based implementation for ATLAS Conditions Data Management System

Conditions Data in high energy physics experiments is frequently seen as every data needed for reconstruction besides the event data itself. This includes all sorts of slowly evolving data like detector alignment, calibration and robustness, and data from detector control system. Also, every Conditions Data Object is associated with a time interval of validity and a version. Besides that, quite often is useful to tag collections of Conditions Data Objects altogether. These issues have already been investigated and a data model has been proposed and used for different implementations based in commercial DBMSs, both at CERN and for the BaBar experiment. The special case of the ATLAS complex trigger that requires online access to calibration and alignment data poses new challenges that have to be met using a flexible and customizable solution more in the line of Open Source components. Motivated by the ATLAS challenges we have developed an alternative implementation, based in an Open Source RDBMS. Several issues were investigated land will be described in this paper: -The best way to map the conditions data model into the relational database concept considering what are foreseen as the most frequent queries. -The clustering model best suited to address the scalability problem. -Extensive tests were performed and will be described. The very promising results from these tests are attracting the attention from the HEP community and driving further developments.Comment: 8 pages, 4 figures, 3 tables, conferenc

Newtonian Perturbations on Models with Matter Creation

Creation of Cold Dark Matter (CCDM) can macroscopically be described by a negative pressure, and, therefore, the mechanism is capable to accelerate the Universe, without the need of an additional dark energy component. In this framework we discuss the evolution of perturbations by considering a Neo-Newtonian approach where, unlike in the standard Newtonian cosmology, the fluid pressure is taken into account even in the homogeneous and isotropic background equations (Lima, Zanchin and Brandenberger, MNRAS {\bf 291}, L1, 1997). The evolution of the density contrast is calculated in the linear approximation and compared to the one predicted by the $\Lambda$CDM model. The difference between the CCDM and $\Lambda$CDM predictions at the perturbative level is quantified by using three different statistical methods, namely: a simple $\chi^{2}$-analysis in the relevant space parameter, a Bayesian statistical inference, and, finally, a Kolmogorov-Smirnov test. We find that under certain circumstances the CCDM scenario analysed here predicts an overall dynamics (including Hubble flow and matter fluctuation field) which fully recovers that of the traditional cosmic concordance model. Our basic conclusion is that such a reduction of the dark sector provides a viable alternative description to the accelerating $\Lambda$CDM cosmology.Comment: Physical Review D in press, 10 pages, 4 figure

Density-functionals not based on the electron gas: Local-density approximation for a Luttinger liquid

By shifting the reference system for the local-density approximation (LDA) from the electron gas to other model systems one obtains a new class of density functionals, which by design account for the correlations present in the chosen reference system. This strategy is illustrated by constructing an explicit LDA for the one-dimensional Hubbard model. While the traditional {\it ab initio} LDA is based on a Fermi liquid (the electron gas), this one is based on a Luttinger liquid. First applications to inhomogeneous Hubbard models, including one containing a localized impurity, are reported.Comment: 4 pages, 4 figures (final version, contains additional applications and discussion; accepted by Phys. Rev. Lett.

Международный культурно-академический обмен: опыт личного и научного роста

В этой статье описывается опыт трех студентов, участвовавших в программе международной академической мобильности в рамках специальности Металлургическое машиностроение. Это отчет о пребывании студентов в России в Уральском федеральном университете, который стал возможным благодаря Федеральному университету Оуро Прето (UFOP) и Совету по международным делам (CAINT). Обмен, который проходил с начала февраля до конца июля, стал возможностью для приобретения новых научных, культурных и социальных знаний, в том числе знаний в области бизнеса, экономики и менеджмента. Надеемся на стимулирование специальности «Международная мобильность» на высшем уровне, в виду ее важности для улучшения академического образования и повышения уровня подготовки выпускников из Бразилии путем научного и культурного обмена.This article has objective describe an experience of three students to integrate a program of International Mobility Academic, during the graduate in Metallurgical Engineering. It is an account of students experience at Russia, at Ural Federal University, made possible by Federal University of Ouro Preto – (UFOP) and Coordinating international affairs – (CAINT). The exchange experience, that is preview to have started on February and end on July, had possibility the acquisition of new scientific knowledge, cultural and social, including learning Business, Economic and Management. As a contribution, hope to stimulate and intensify the International Mobility specialty in the ambit of graduate, considering the it important to improvement of academic education and the excellence on superior graduate Brazilian by scientific exchange and culture on exterior

Solos e aptidão agrícola das terras cultivadas com cajueiro no Estado do Maranhão.

Situacao, limites e extensao; clima; geologia; quartenario; terciario;cretaceo; triasico; permiano; pre-cambriano indiviso; vegetacao; floresta caducifolia; floresta subcaducifolia/caducifolia; floresta subcaducifolia; floresta subperenifolia; cerrados; restingas e dunas; relevo;chapadas altas; chapadas baixas; superficies suave-onduladas; grande baixada maranhense; tabuleiros costeiros; restingas e dunas costeiras; estudo de campo; analise do solo; solos; criterios para estabelecimento e subdivisao das classes de solos e fases empregadas; descricao das classes de solos; aptdao agricola da terra para o cajueiro.bitstream/CNPAT-2010/4781/1/Bp-021.pd