Performance of the CMS cathode strip chambers with cosmic rays

The Cathode Strip Chambers (CSCs) constitute the primary muon tracking device in the CMS endcaps. Their performance has been evaluated using data taken during a cosmic ray run in fall 2008. Measured noise levels are low, with the number of noisy channels well below 1%. Coordinate resolution was measured for all types of chambers, and fall in the range 47μm to 243μm. The efficiencies for local charged track triggers, for hit and for segments reconstruction were measured, and are above 99%. The timing resolution per layer is approximately 5 ns. © 2010 IOP Publishing Ltd and SISSA.

Aligning the CMS muon chambers with the muon alignment system during an extended cosmic ray run

The alignment system for the muon spectrometer of the CMS detector comprises three independent subsystems of optical and analog position sensors. It aligns muon chambers with respect to each other and to the central silicon tracker. System commissioning at full magnetic field began in 2008 during an extended cosmic ray run. The system succeeded in tracking muon detector movements of up to 18 mm and rotations of several milliradians under magnetic forces. Depending on coordinate and subsystem, the system achieved chamber alignment precisions of 140-350 μm and 30-200 μrad, close to the precision requirements of the experiment. Systematic errors on absolute positions are estimated to be 340-590 μm based on comparisons with independent photogrammetry measurements. © 2010 IOP Publishing Ltd and SISSA.

Precise mapping of the magnetic field in the CMS barrel yoke using cosmic rays

The CMS detector is designed around a large 4 T superconducting solenoid, enclosed in a 12 000-tonne steel return yoke. A detailed map of the magnetic field is required for the accurate simulation and reconstruction of physics events in the CMS detector, not only in the inner tracking region inside the solenoid but also in the large and complex structure of the steel yoke, which is instrumented with muon chambers. Using a large sample of cosmic muon events collected by CMS in 2008, the field in the steel of the barrel yoke has been determined with a precision of 3 to 8% depending on the location. © 2010 IOP Publishing Ltd and SISSA.

Performance of CMS muon reconstruction in cosmic-ray events

The performance of muon reconstruction in CMS is evaluated using a large data sample of cosmic-ray muons recorded in 2008. Efficiencies of various high-level trigger, identification, and reconstruction algorithms have been measured for a broad range of muon momenta, and were found to be in good agreement with expectations from Monte Carlo simulation. The relative momentum resolution for muons crossing the barrel part of the detector is better than 1% at 10 GeV/c and is about 8% at 500 GeV/c, the latter being only a factor of two worse than expected with ideal alignment conditions. Muon charge misassignment ranges from less than 0.01% at 10GeV/c to about 1% at 500 GeV/c. © 2010 IOP Publishing Ltd and SISSA.

Sistemática da seção Virescentia do gênero Batrachospermum (Rhodophyta, Batrachospermales) no Brasil

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Características sócio-demográficas e epidemiológicas da tuberculose: avaliação etnobotânica e da atividade antimicobacteriana das plantas utilizadas por uma comunidade indígena

Pós-graduação em Biociências e Biotecnologia Aplicadas à Farmácia - FCFAR

A criança em situação de berçário e a formação do professor para a educação infantil

Pós-graduação em Educação - FFC

Avaliação da indução de resistência no controle do crestamento bacteriano comum do feijão vagem

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Cyatta abscondita: Taxonomy, Evolution, and Natural History of a New Fungus-Farming Ant Genus from Brazil

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Análise da atividade antimicrobiana dos extratos de Cordia verbenacea DC, Mikania laevigata Sch. Bip. ex Baker e Psidium Cattleianum frente a microrganismos endodônticos

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

A Social Parasite Evolved Reproductive Isolation from Its Fungus-Growing Ant Host in Sympatry

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

A Brazilian population of the asexual fungus-growing ant Mycocepurus smithii (Formicidae, Myrmicinae, Attini) cultivates fungal symbionts with gongylidia-like structures

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Educação brasileira: uma perspectiva econômica

Este presente trabalho apresenta a trajetória das políticas públicas educacionais aplicadas no Brasil, com estudos de taxa de retorno da educação, índices como IDH e PIB, gráficos sobre a tal evolução e comparação entre países. Com base na Teoria do Capital Humano e de seus principais autores, Schultz, Becker e Mincer e na atuação e incentivo das Organizações Internacionais. O estudo conclui que apesar da educação brasileira estar atrasada comparada a outros países, políticas educacionais aplicadas através de principalmente programas sociais tem mudado sua realidade, ainda que lentamente