Search results for " Phase"

showing 10 items of 1862 documents

PROPAGAZIONE DI ONDE DI RAYLEIGH LUNGO SUPERFICI CURVE: UNO STUDIO NUMERICO E SPERIMENTALE

2014

Il fenomeno della propagazione delle onde di superficie lungo confini rettilinei (superfici piane) è stato studiato adeguatamente. Tuttavia le indagini riguardanti la loro propagazione in superfici cilindriche sono limitate e risultano insufficienti ai fini di un loro utilizzo nelle tecniche d’ispezione non distruttive (NDE), nonostante possano essere di grande interesse per svariate applicazioni. E’ stato dimostrato sperimentalmente che l’onda superficiale subisce un cambiamento di fase durante la sua propagazione lungo una superficie cilindrica. Un approccio numerico è stato sviluppato per studiare questi effetti per diversi materiali, curvature e frequenze. I risultati numerici e sperime…

Settore ING-IND/14 - Progettazione Meccanica E Costruzione Di MacchineCylindrical surface waves phase shift laser ultrasound numerical simulation.
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Poly lactic acid based foams prepared via thermally induced phase separation (TIPS): A method to tune the crystallinity

2012

Blends of Poly-L-Lactic Acid (PLLA) with two Poly-Lactic Acid (PLA) in different proportions (90/10 and 70/30) were utilized in order to produce biodegradable and biocompatible scaffolds for soft tissue engineering applications. The scaffolds were produced via thermally induced phase separation (TIPS) starting from ternary systems where dioxane was the solvent and water the non-solvent. Morphology was evaluated by Scanning Electron Microscopy (average pore size and interconnection). Moreover a DSC analysis was carried out on the as-obtained scaffold in order to obtain information about theirs thermal properties (enthalpy of melt and crystallization). The results showed that is possible to p…

Settore ING-IND/24 - Principi Di Ingegneria ChimicaMorphology (linguistics)Materials scienceScanning electron microscopetechnology industry and agriculturelaw.inventionSolventScaffold phase separation polymer blending poly lactic acidCrystallinitySettore ING-IND/22 - Scienza E Tecnologia Dei MaterialiDifferential scanning calorimetrylawPolymer blendCrystallizationComposite materialTernary operationAIP Conference Proceedings
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Theoretical Predictions and experimental determination of cloud point curves for polymeric solutions: an application to the ternary system Poly-lacti…

2011

The lattice fluid model with specific interactions was applied to the ternary system Poly-L-lactic-acid (PLLA)-dioxane-water. Model parameters were determined by fitting experimental data. The as-obtained parameters were used to calculate the complete phase diagram. An experimental apparatus for cloud point measurements, which is under construction, is presented.

Settore ING-IND/24 - Principi Di Ingegneria ChimicaPolymeric solutions phase diagrams phase separationSettore ING-IND/22 - Scienza E Tecnologia Dei Materiali
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Poly-left-lactic acid tubular scaffolds via diffusion induced phase separation: Control of morphology

2013

n this work, tubular poly-left-lactic acid scaffolds for vascular tissue engineering applications were produced by an innovative two-step method. The scaffolds were obtained by performing a dip-coating around a nylon fiber, followed by a diffusion induced phase separation process. Morphological analysis revealed that the internal lumen of the as-obtained scaffold is equal to the diameter of the fiber utilized; the internal surface is homogeneous with micropores 1–2 μm large. Moreover, a porous open structure was detected across the thickness of the walls of the scaffold. An accurate analysis of the preparation process revealed that it is possible to tune up the morphology of the scaffold (w…

Settore ING-IND/24 - Principi Di Ingegneria ChimicaScaffoldMaterials sciencescaffold poly-lactic acid tissue engineeringDiffusion Induced Phase separationPolymers and PlasticsPhase separation processPoly-left lactic acidvascular tissue engineeringGeneral ChemistryLactic acidchemistry.chemical_compoundSettore ING-IND/22 - Scienza E Tecnologia Dei MaterialichemistryTissue engineeringHomogeneousSettore BIO/10 - BiochimicaMaterials ChemistryComposite materialPorosityWall thicknessIn vitro cell culturePolymer Engineering & Science
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PLLA scaffolds based on thermally induced phase separation: morphology, cell seeding and proliferation

2009

Settore ING-IND/24 - Principi Di Ingegneria ChimicaSettore ING-IND/26 - Teoria Dello Sviluppo Dei Processi ChimiciSettore ING-IND/22 - Scienza E Tecnologia Dei MaterialiSettore BIO/10 - BiochimicaPLLA Thermally Induced phase separation scaffold tissue engineering
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PLLA biodegradable scaffolds for Vascular Tissue Engineering (VTE) applications via dip drawing and Diffusion Induced Phase Separation (DIPS)

2009

Settore ING-IND/24 - Principi Di Ingegneria ChimicaSettore ING-IND/26 - Teoria Dello Sviluppo Dei Processi ChimiciSettore ING-IND/22 - Scienza E Tecnologia Dei MaterialiTissue engineering vascular grafts scaffold Diffusion Induced Phase Separation (DIPS)Settore BIO/10 - Biochimica
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A Framework for Parallel Assessment of Reputation Management Systems

2016

Several distributed applications running over the Internet use Reputation Management Systems (RMSs) to guarantee reliable interactions among unknown agents. Because of the heterogeneity of the existing RMSs, their assessment in terms of correctness and resistance to security attacks is not a trivial task. This work addresses this issue by presenting a novel parallel simulator aimed to support researchers in evaluating the performances of a RMS since the design phase. Preliminary results obtained by simulating two different attacks confirm the suitability of the proposed framework to evaluate different RMSs.

Settore ING-INF/05 - Sistemi Di Elaborazione Delle InformazioniCorrectnessbusiness.industryComputer scienceDistributed computing02 engineering and technologyMulti-threaded applicationTask (project management)Human-Computer InteractionDesign phaseParallel simulationComputer Networks and CommunicationDistributed reputation management020204 information systems0202 electrical engineering electronic engineering information engineering020201 artificial intelligence & image processingThe InternetParallel simulationbusinessSoftwareReputation managementProceedings of the 17th International Conference on Computer Systems and Technologies 2016
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Ancora sulle "esplosive palatali" nelle inchieste dell'Atlante Linguistico del Mediterraneo (ALM): i punti albanesi

2021

Tra i «Problemi redazionali» emersi in fase di controllo e organizzazione dei materiali giunti dalla campagna di rilevamenti dell’Atlante Linguistico del Mediterraneo (ALM), Berruto (1971-1973) rileva la proliferazione e l’eterogeneità di alcune scelte grafemiche operate da diversi raccoglitori che, impegnati in una trascrizione più o meno puntuale delle risposte ottenute, avevano interpretato e risolto variamente alcune delle indicazioni previste nel sistema di trascrizione fonetica che accompagnava il Questionario. Particolarmente complesso era emerso il quadro relativo alla trascrizione di alcune consonanti del settore “palatale”, per le quali i grafemi (e i foni a essi corrispondenti) p…

Settore L-FIL-LET/12 - Linguistica ItalianaAmong the «Editorial problems» that emerged during the control and organization of the materials coming from the survey campaign of the Atlante Linguistico del Mediterraneo (ALM) Berruto (1971-1973) notes the proliferation and heterogeneity of some graphemic choices made by different field researchers. As they were engaged in a more or less punctual transcription of the answers obtained they had interpreted and solved differently some of the directions provided in the phonetic transcription system that accompanied the Questionnaire. The picture relating to the transcription of some consonants of the palatal sector had emerged as particularly complex since the graphemes (and the corresponding phones) foreseen in the original system (ALM 1959) were insufficient. Not even the 1971 updates meant to improve the representation of some phonetic features emerged from the investigations in the operations of Response reviewing allowed to obtain a clear homogeneous picture regarding the «plosive palatal» consonants. With regard to the phonetic trait under scrutiny I have already had the opportunity to propose a path aiming to the achievement of possible operational solutions. This has taken place in view of the planned simplification / homologation and transcoding phase from the ALM original system to the IPA one - while proceeding from the examination of the Schedoni’s current state with regard to the surveys referring to central-southern Italy Corsica and Sicily (see Matranga 2019). The scope is now to investigate the same phonetic trait as proven in the materials about the surveys carried out by Lirak Dodbiba in the ALM’s three Albanian points.
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Sign-preserving solutions for a class of asymptotically linear systems of second-order ordinary differential equations

2022

We study multiplicity of solutions to an asymptotically linear Dirichlet problem associated with a planar system of second order ordinary differential equations. The existence of two sign-preserving component-wise solutions is guaranteed when the Morse indexes of the linearizations at zero and at infinity do not coincide, and one of the asymptotic problems has zero-index. The proof is developed in the framework of topological and shooting methods and it is based on a detailed analysis and characterization of the phase angles in a two-dimensional setting.

Settore MAT/05 - Analisi MatematicaApplied MathematicsAnalysisAsymptotically Linear Planar Systems Sign-preserving Solutions Morse Index Phase Angles
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Phenotypic Aspects of Longevity

2019

Centenarians are individuals who live over the average life span characteristic of their population. The growing number of old people worldwide makes it necessary to identify a good strategy to reach healthy ageing and avoid or delay age-related diseases. The longevity phenotype is the result of a positive combination between genetic, epigenetic, stochastic and lifestyle factors. So, the analysis of all the known parameters that can influence these single elements or their interaction can give new possible elements to delineate a sort of longevity signature. Starting from the easiest biomarkers as the haematochemical values and reaching the study of molecular and cellular components, as the…

Settore MED/04 - Patologia Generaleeducation.field_of_studymedia_common.quotation_subjectPopulationLongevityImmunosenescenceBiologyPhenotypeAgeingEvolutionary biologyAgeing Body composition Centenarians Inflamm-ageing Longevity Phase angle.Life expectancyEpigeneticsCentenarianeducationmedia_common
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