999 resultados para Giovanni Colonna


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El presente trabajo propone una crítica sobre los obstáculos en la integración del inmigrante musulmán vislumbrados por Giovanni Sartori en su ensayo «La sociedad multiétnica. Pluralismo, multiculturalismo y extranjeros» y en su apéndice «La sociedad multiétnica. Extranjeros e islámicos». De esta forma, el objetivo de esta monografía es disertar sobre la manera en la que la explicación del problema de la integración del inmigrante musulmán en Sartori resulta limitada a la hora de entender las dificultades de la integración del inmigrante musulmán en el caso francés. Si bien la condición cultural es crucial para comprender las contrariedades que afronta este inmigrante en su inserción en las sociedades occidentales, es necesario considerar la incidencia de otras variables, que pese a conducir a conclusiones similares, procuran una comprensión más compleja. Un análisis a los procesos de colonización e inmigración de musulmanes magrebíes en Francia, ejemplifica la necesidad de examinar y comprender el problema desde el trasfondo político e histórico.

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Resumen tomado de la revista

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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

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A large sample of cosmic ray events collected by the CMS detector is exploited to measure the specific energy loss of muons in the lead tungstate (PbWO4) of the electromagnetic calorimeter. The measurement spans a momentum range from 5 GeV/c to 1 TeV/c. The results are consistent with the expectations over the entire range. The calorimeter energy scale, set with 120 GeV/c electrons, is validated down to the sub-GeV region using energy deposits, of order 100 MeV, associated with low-momentum muons. The muon critical energy in PbWO4 is measured to be 160+5 -68 GeV, in agreement with expectations. This is the first experimental determination of muon critical energy. © 2010 IOP Publishing Ltd and SISSA.

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The CMS Collaboration conducted a month-long data-taking exercise known as the Cosmic Run At Four Tesla in late 2008 in order to complete the commissioning of the experiment for extended operation. The operational lessons resulting from this exercise were addressed in the subsequent shutdown to better prepare CMS for LHC beams in 2009. The cosmic data collected have been invaluable to study the performance of the detectors, to commission the alignment and calibration techniques, and to make several cosmic ray measurements. The experimental setup, conditions, and principal achievements from this data-taking exercise are described along with a review of the preceding integration activities. © 2010 IOP Publishing Ltd and SISSA.

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The CMS Level-1 trigger was used to select cosmic ray muons and LHC beam events during data-taking runs in 2008, and to estimate the level of detector noise. This paper describes the trigger components used, the algorithms that were executed, and the trigger synchronisation. Using data from extended cosmic ray runs, the muon, electron/photon, and jet triggers have been validated, and their performance evaluated. Efficiencies were found to be high, resolutions were found to be good, and rates as expected. © 2010 IOP Publishing Ltd and SISSA.

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The performance of the Local Trigger based on the drift-tube system of the CMS experiment has been studied using muons from cosmic ray events collected during the commissioning of the detector in 2008. The properties of the system are extensively tested and compared with the simulation. The effect of the random arrival time of the cosmic rays on the trigger performance is reported, and the results are compared with the design expectations for proton-proton collisions and with previous measurements obtained with muon beams. © 2010 IOP Publishing Ltd and SISSA.

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The CMS experiment uses self-triggering arrays of drift tubes in the barrel muon trigger to perform the identification of the correct bunch crossing. The identification is unique only if the trigger chain is correctly synchronized. In this paper, the synchronization performed during an extended cosmic ray run is described and the results are reported. The random arrival time of cosmic ray muons allowed several synchronization aspects to be studied and a simple method for the fine synchronization of the Drift Tube Local Trigger at LHC to be developed. © 2010 IOP Publishing Ltd and SISSA.