1,790 research outputs found

    The TileCal Energy Reconstruction for LHC Run2 and Future Perspectives

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    The TileCal is the main hadronic calorimeter of ATLAS and it covers the central part of the detector (η|\eta| < 1.6). The energy deposited by the particles in TileCal is read out by approximately 10,000 channels. The signal provided by the readout electronics for each channel is digitized at 40 MHz and its amplitude is estimated by an optimal filtering algorithm. The increase of LHC luminosity leads to signal pile-up that deforms the signal of interest and compromises the amplitude estimation performance. This work presents the proposed algorithm for energy estimation during LHC Run 2. The method is based on the same approach used during LHC Run 1, namely the Optimal Filter. The only difference is that the signal baseline (pedestal) will be subtracted from the received digitized samples, while in Run 1 this quantity was estimated on an event-by-event basis. The pedestal value is estimated through special calibration runs and it is stored in a data base for online and offline usage. Additionally, the background covariance matrix will also be used for the computation of the Optimal Filter weights for high occupancy channels. The use of such information reduces the bias and uncertainties introduced by signal pile-up. The performance of the Optimal Filter version used in Run 1 and Run 2 is compared using Monte Carlo data. The efficiency achieved by the methods is shown in terms of error estimation, when different conditions of luminosity and occupancy are considered. Concerning future work, a new method based on linear signal deconvolution has been recently proposed and it is under validation. It could be used for Run 2 offline energy reconstruction and future upgrades.Comment: 5 pages, 7 figures, LISHEP 2015, 2-9 August 2015, Manau

    A ressurgência dos sentidos

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    Espaço intersubjetivo da linguagem e do pensamento. Sebastianismo e Quinto Império. Reflexão com o suporte teórico de Mikhail Bakhtine.info:eu-repo/semantics/publishedVersio

    O tratado de Lisboa e o Sermão de Santo António aos peixes: as surpreendentes semelhanças

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    O artigo passa em revista o fracasso do Tratado Constitucional, indagando sobre os elementos de continuidade e ruptura entre este tratado e o Tratado de Lisboa. Como pouco mudou de um tratado para o outro, e como os líderes europeus subtrairam o Tratado de Lisboa à ratificação através de referendos nacionais, somos levados a uma improvável semelhança com o Sermão de Santo António aos Peixes: a integração europeia continua a avançar divorciada dos cidadãos. The paper examines the events that triggered the failure of the Constitutional Treaty. Particular emphasis is on the aspects of continuity and rupture between this treaty and the Lisbon Treaty. Since only a few things changed when both treaties are compared, and considering European leaders’ decision to avoid national referendums on the Lisbon Treaty, an implausible similarity with António Vieira’s book (Saint Anthony’s Sermon to the Fishes) emerges: European integration developments fail to encompass citizens’ voice

    Fernando Pessoa e a voz de Shakespeare

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    Neste ensaio, procuro refletir sobre o sentido de emulação percetível em alguns textos de Pessoa, no que às relações que com alguns outros escritores canónicos diz respeito; nesse sentido, abordo a relação de pensamento e de admiração que Pessoa manteve, ao longo de toda a sua vida, com Shakespeare, bem como a relação dialógica possível de deduzir nos procedimentos de criação heteronímica pessoana e na criação de personagens shakespeareana. Seguindo essa perspetiva, concentro-me em diversas questões: no “problema shakespeareano” (lembrando, pelas leituras de Pessoa, alguns exemplos capazes de esclarecerem um posicionamento específico do poeta português relativamente a Shakespeare); na problemática da “alteridade” — bem como na conceção pessoana de “poeta dramático”, dos “graus da poesia lírica” e da “dinâmica dialógica” inerente à heteronímia de Fernando Pessoa (que nos reenvia, de imediato, para a teoria do fingimento pessoano); no problema da “figuração psicológica” inerente ao poeta dos heterónimos e ao poeta nascido em Stratford-upon-Avon; na “ansiedade da influência”.I will try to reflect on the sense of “emulation” that is perceptible in some texts of Fernando Pessoa, in what concerns the relations with some other canonical writers; I will discuss the relationship that Pessoa maintained with Shakespeare, as well as the dialogical 54 Anu. Lit., Florianópolis, v. 22, n. 1, p. 31-54, 2017. ISSNe 2175-7917 relationship that is possible to deduce in the procedures of creation of Pessoa’s heteronyms and in the creation of Shakespearean characters. From this perspective, I will try to focus on several issues: in the “Shakespearean problem” (recalling some examples capable of clarifying a specific position of the Portuguese poet towards Shakespeare); In terms of “alterity” – as well as in the conception of Pessoa as “dramatic poet”, of the “degrees of poetry” and of the “dialogical dynamics” of Fernando Pessoa’s heteronymy (which immediately returns us to the theory of “Artistic lie”); In the problem of the “psychological figuration” of the poet of the heteronymic personages, as well as of the poet born in Stratfordupon-Avon; In the “anxiety of influence” (through which we will study the role of the heteronym Alberto Caeiro).info:eu-repo/semantics/publishedVersio

    Literatura, leitura e figuração do imaginário (e Uma carta...)

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    Livro de homenagem à Professora Maria Emília Ricardo Marque

    Fernando Pessoa: um diálogo com a Lusofonia

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    Reflexão sobre a “Lusofonia”. Nesse sentido se opera sobre matrizes operatórias configuradas por termos e conceitos diversos: “língua”, “discurso identitário” “unidade” e “diversidade”. Para isso, esta reflexão apoia-se pensamento de Fernando Pessoa acerca da “língua portuguesa”, das “línguas universais”, do “Quinto império” e do “imperialismo cultural”, no sentido de consolidar uma noção: a que fundamenta o princípio de existência de uma ampla Comunidade linguística traçada pelo diapasão da unidade

    Interartes (cinema, música) e expressão artística: Coro Mozart & “Hamilton”

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    Série Estudos Interartes (Cinema, Música) | Expressão ArtísticaVídeo de “Hamilton” (de Lin-Manuel Miranda; Arr. Lisa Despain; Adapt: Dionísio Vila Maior; Coreografia e direção de expressão artística: Dionísio Vila Maior), com interpretação do Coro Mozart. Gravação realizada em 2020. Produção Técnica: PRE – Pro Rent Events | Som | iluminação | Multicâmera | Streaming | VideoledN/

    Calibration and Performance of the ATLAS Tile Calorimeter

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    The Tile Calorimeter (TileCal) is the hadronic calorimeter covering the most central region of the ATLAS experiment at the LHC. It is a key detector for the measurement of hadrons, jets, tau leptons and missing transverse energy. The TileCal calibration system comprises radioactive source, laser and charge injection elements and it allows to monitor and equalize the calorimeter response at each stage of the signal production, from scintillation light to digitization. This contribution presents a brief description of the different TileCal calibration systems as well as the latest results on their performance in terms of calibration factors, linearity and stability. The performance of the Tile Calorimeter with the cosmic muons and collision data is also presented, including the absolute energy scale, time resolution and associated stabilities.Comment: 4 pages, 7 figures, LISHEP 2013, 17-24 March 2013, Rio de Janeir
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