Search results for "EP test"

showing 4 items of 4 documents

Impact of reforestations with exotic and native species on water repellency of forest soils

2017

Forest duff layer is usually water repellent due to the hydrophobic organic compounds resulting from degradation of tree tissues. Transition from hydrophobic to wettable conditions, or vice versa, is largely controlled by water content. The objective of this investigation was to assess the influence of soil moisture on the degree of soil water repellency (WR) in exotic and native tree forests. Occurrence of WR was investigated by the water drop penetration time (WDPT) and the ethanol percentage (EP) tests. Sampling was conducted in the forest soils of two exotic species (Pinus pinaster, P, and Eucaliptus camaldulensis, E), used in the past for reforestation, and two native species (Quercus …

EP testForest soilSettore AGR/08 - Idraulica Agraria E Sistemazioni Idraulico-ForestaliSoil water repellencyForest soils Soil water repellency WDPT test EP testWDPT test
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Linear and nonlinear fractional hereditary constitutive laws of asphalt mixtures

2016

The aim of this paper is to propose a fractional viscoelastic and viscoplastic model of asphalt mixtures using experimental data of several tests such as creep and creep recovery performed at different temperatures and at different stress levels. From a best fitting procedure it is shown that both the creep one and recovery curve follow a power law model. It is shown that the suitable model for asphalt mixtures is a dashpot and a fractional element arranged in series. The proposed model is also available outside of the linear domain but in this case the parameters of the model depend on the stress level.

Materials scienceasphalt mixtureStrategy and Managementcreep test0211 other engineering and technologies02 engineering and technologyfractional calculusPower lawcreep test.ViscoelasticityDashpot0203 mechanical engineering021105 building & constructionSettore ICAR/04 - Strade Ferrovie Ed AeroportiComposite materialviscoplasticityviscoelasticityCivil and Structural EngineeringBuilding constructionmechanical modelsViscoplasticityMechanicsmechanical modelFractional calculusfractional calculus asphalt mixture viscoelasticity viscoplasticity rheology mechanical models creep testfractional calculuNonlinear system020303 mechanical engineering & transportsCreepAsphaltrheologyTH1-9745
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Evaluation of the temperature effect on the fractional linear viscoelastic model for an epoxy resin

2016

The paper deals with the evolution of the parameters of a fractional model for different values of temperature. An experimental campaign has been performed on epoxy resin at different levels of temperature. It is shown that epoxy resin is very sensitive to the temperature.

Physics::Popular PhysicsCreep test Epoxy resin Temperature Fractional calculus Linear viscoelasticitySettore ING-IND/22 - Scienza E Tecnologia Dei MaterialiMaterials sciencevisual_artvisual_art.visual_art_mediumFractional modelAstrophysics::Earth and Planetary AstrophysicsEpoxyComposite materialSettore ICAR/08 - Scienza Delle CostruzioniViscoelasticityComputer Science::OtherAIP Conference Proceedings
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Logical Intelligence Enhancement Test: a measure for the evaluation of logical skills in primary school

2019

Il presente lavoro si inserisce in uno studio pilota condotto nell’anno scolastico 2018-2019per valutare l’efficacia del Logical Intelligence Enhancement Programme (LIEP, Calvani, Peru,& Zanaboni, 2019), un programma composto da tavole di logica verbale e numerica volte asviluppare il ragionamento logico e le capacità metacognitive di studenti di quinta primaria.All’interno di questo studio è stato sviluppato il Logical Intelligence Enhancement test perstimare gli effetti del training sulle abilità logico-verbali. Il contributo presenta la costru-zione del test, le sue caratteristiche psicometriche e la validazione. A tal fine, lo strumentoè stato somministrato a un campione di 173 stud…

potenziamento cognitivolog-ical-verbal skillvalidazioneabilità logico-verbaliscuola primariatest validationcognitive enhancementLogical Intelligence Enhancement Test (LIEP test)primary school
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