Search results for " natura."

showing 3 items of 34973 documents

Beam-induced and cosmic-ray backgrounds observed in the ATLAS detector during the LHC 2012 proton-proton running period

2016

This paper discusses various observations on beam-induced and cosmic-ray backgrounds in the ATLAS detector during the LHC 2012 proton-proton run. Building on published results based on 2011 data, the correlations between background and residual pressure of the beam vacuum are revisited. Ghost charge evolution over 2012 and its role for backgrounds are evaluated. New methods to monitor ghost charge with beam-gas rates are presented and observations of LHC abort gap population by ghost charge are discussed in detail. Fake jets from colliding bunches and from ghost charge are analysed with improved methods, showing that ghost charge in individual radio-frequency buckets of the LHC can be resol…

Большой адронный коллайдерbackground [beam]Physics::Instrumentation and DetectorsMonte Carlo methodPerformance of high energy physics detectorJet (particle physics)01 natural sciencesHigh Energy Physics - ExperimentSubatomär fysikHigh Energy Physics - Experiment (hep-ex)pressureSubatomic Physicsscattering [p p][PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]Instrumentationпротон-протонные столкновенияQCMathematical PhysicsPhysicseducation.field_of_studyPerformance of high energy physics detectorsLarge Hadron ColliderSettore FIS/01 - Fisica SperimentaleBeam-intensity monitors; Beam-line instrumentation (beam position and profile monitors; Bunch length monitors); Data analysis; Performance of high energy physics detectors; Instrumentation; Mathematical PhysicsData analysiMonte Carlo [numerical calculations]ATLASbuildingsBunchesCERN LHC CollBeam-intensity monitorBeam-line instrumentation (beam position and profile monitorComputingMethodologies_DOCUMENTANDTEXTPROCESSINGcolliding beams [p p]Particle Physics - ExperimentParticle physicsCiências Naturais::Ciências Físicas530 PhysicsAstrophysics::High Energy Astrophysical PhenomenaPopulation:Ciências Físicas [Ciências Naturais]Beam-line instrumentation (beam position and profile monitorsData analysisFOS: Physical sciencesgapCosmic ray530Bunch length monitors)Nuclear physicsATLAS LHC High Energy Physics510 Mathematics0103 physical sciencesBeam-line instrumentation (beam position and profile monitors;; beam-intensity monitors; bunch length monitors); Data analysis;; Performance of High Energy Physics Detectors; LEPHigh Energy Physicsddc:610010306 general physicseducationMuonScience & Technologycosmic radiation [muon]010308 nuclear & particles physicsFísicaLEPBeam-intensity monitorsghostcorrelationExperimental High Energy PhysicsBeam-line instrumentation (beam position and profile monitors; beam-intensity monitors; bunch length monitors); Data analysis; Performance of High Energy Physics DetectorsBeam-line instrumentation (beam position and profile monitors; beam-intensity monitors; bunch length monitors)Physics::Accelerator PhysicsPerformance of High Energy Physics DetectorsATLAS детекторBeam (structure)experimental resultsbeam-line instrumentation
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Dynamics of a harmonic oscillator coupled with a Glauber amplifier

2020

A system of a quantum harmonic oscillator bi-linearly coupled with a Glauber amplifier is analysed considering a time-dependent Hamiltonian model. The Hilbert space of this system may be exactly subdivided into invariant finite dimensional subspaces. Resorting to the Jordan-Schwinger map, the dynamical problem within each invariant subspace may be traced back to an effective SU(2) Hamiltonian model expressed in terms of spin variables only. This circumstance allows to analytically solve the dynamical problem and thus to study the exact dynamics of the oscillator-amplifier system under specific time-dependent scenarios. Peculiar physical effects are brought to light by comparing the dynamics…

гармонические осцилляторынестационарные гамильтонианыinverted quantum harmonic oscillatorNuclear TheoryFOS: Physical sciences01 natural sciencestime-dependent Hamiltonian010305 fluids & plasmasinteracting quantum harmonic oscillatorsymbols.namesakeexactly solvable SU(2) dynamical problem0103 physical sciencesInvariant (mathematics)Nuclear Experiment010306 general physicsMathematical PhysicsHarmonic oscillatorSpin-½PhysicsQuantum PhysicsInvariant subspaceHilbert spaceCondensed Matter PhysicsLinear subspaceAtomic and Molecular Physics and Opticsквантовые гармонические осцилляторыClassical mechanicsQuantum harmonic oscillatorточно решаемые динамические задачиCondensed Matter::Statistical MechanicssymbolsGlauber amplifierQuantum Physics (quant-ph)GlauberPhysica Scripta
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MACROLEPIDOPTERA SPECIES WITH VULNERABLE STATUS AND THEIR IMPACT ON THE PROTECTED AREA OF DUMBRAVA SIBIULUI

2013

The present work is a part of a complet study concerning of Macrolepidoptera from the forest “Dumbrava Sibiului” in the Sibiu county. They are presented only the species found by myself for the frist time from this area. I mention that these species were not found by me in the five collections of Lepidoptetra studied by me and preserved at the Natural Hystory Museum in Sibiu.

“Dumbrava Sibiului” Natural Rezervationspecies vulnerableMacrolepidopteracollectionslcsh:Agriculture (General)lcsh:S1-972Scientific Papers Series : Management, Economic Engineering in Agriculture and Rural Development
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