Search results for "modular structure"

showing 3 items of 3 documents

Modular Structures on Trace Class Operators and Applications to Landau Levels

2009

The energy levels, generally known as the Landau levels, which characterize the motion of an electron in a constant magnetic field, are those of the one-dimensional harmonic oscillator, with each level being infinitely degenerate. We show in this paper how the associated von Neumann algebra of observables displays a modular structure in the sense of the Tomita–Takesaki theory, with the algebra and its commutant referring to the two orientations of the magnetic field. A Kubo–Martin–Schwinger state can be built which, in fact, is the Gibbs state for an ensemble of harmonic oscillators. Mathematically, the modular structure is shown to arise as the natural modular structure associated with the…

Statistics and ProbabilityGeneral Physics and AstronomyFOS: Physical sciencesGibbs state01 natural sciencessymbols.namesake0103 physical sciences0101 mathematics010306 general physicsSettore MAT/07 - Fisica MatematicaHarmonic oscillatorMathematical PhysicsMathematical physicsPhysicsNuclear operatorMathematics::Operator AlgebrasLandau level010102 general mathematicsDegenerate energy levelsHilbert spaceStatistical and Nonlinear PhysicsObservableLandau quantizationMathematical Physics (math-ph)Von Neumann algebraModeling and Simulationsymbolsmodular structure
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Brothers, sisters and the rearrangements of property on the Sicilian island of Stromboli in the nineteenth century

2010

This article focuses on property relationships among siblings, especially on sales and exchanges of land, houses and other items, on the small Sicilian island of Stromboli in the Aeolian archipelago during the nineteenth century. Stromboli's economy incorporated farming and seafaring activities. The ‘modular structure’ of houses and wealth was characterised by partible inheritance, with equal inheritance shares or endowments for both sons and daughters, which was permitted under the Civil Code of the Kingdom of the Two Sicilies. Siblings therefore had the possibility of exchanging, assembling and disposing of shares through sales. For this reason sibling relations had a strong impact on the…

famigliaHistoryProperty (philosophy)HistoryModular structuremedia_common.quotation_subjectPartible inheritanceSibling relationsDowrylanguage.human_languageGenealogySettore SECS-P/12 - Storia EconomicalanguageStromboliInheritanceCivil codeSicilianparentelamedia_commonmercato della terra
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Struttura galleggiante ad elevata stabilità (Floating structure with high stability)

2015

DESCRIZIONE GENERALE La struttura galleggiante innovativa è composta da diversi elementi modulari collegati fra loro. La composizione modulare della struttura consente di conferirle la lunghezza dettata dalle particolari esigenze da soddisfare. Tipiche applicazioni della struttura galleggiate innovativa sono i pontili, le passerelle pedonali o ciclabili su specchi d'acqua, e in generale le opere finalizzate a consentire lo spostamento di persone, merci e/o veicoli fra punti di uno specchio d'acqua (marino o lacustre) utilizzando strutture galleggianti. Ogni modulo, lungo 10-15 m, è tenuto a galla dalla spinta di Archimede sulle sue parti immerse (le carene), spinta che nella struttura innov…

pontilihigh stabilitystrutture modularielevata stabilitàSettore ICAR/02 - Costruzioni Idrauliche E Marittime E Idrologialanding stageArchimedes forceFloating structureSettore ICAR/01 - Idraulicafloating pathStrutture galleggiantisentieri galleggiantispinta di Archimedemodular structure
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