Search results for "Mixing"

showing 10 items of 795 documents

An Additive Model to Predict the Rheological and Mechanical Properties of Polypropylene Blends Made by Virgin and Reprocessed Components

2021

In this work, an additive model for the prediction of the rheological and mechanical properties of monopolymer blends made by virgin and reprocessed components is proposed. A polypropylene sample has been reprocessed more times in an extruder and monopolymer blends have been prepared by simulating an industrial process. The scraps are exposed to regrinding and are melt reprocessed before mixing with the virgin polymer. The reprocessed polymer is, then, subjected to some thermomechanical degradation. Rheological and mechanical experimental data have been compared with the theoretical predictions. The results obtained showed that the values of this simple additive model are a very good fit fo…

0209 industrial biotechnologyMaterials scienceAdditive model Monopolymer blends Polypropylene ReprocessingPlastics extrusionMixing (process engineering)02 engineering and technologyManagement Monitoring Policy and Lawchemistry.chemical_compound020901 industrial engineering & automationRheologyGeneral Materials ScienceComposite materialAdditive modelWaste Management and Disposaladditive modelreprocessinglcsh:Environmental sciencesPolypropylenechemistry.chemical_classificationlcsh:GE1-350monopolymer blendsPolymer021001 nanoscience & nanotechnologySettore ING-IND/22 - Scienza E Tecnologia Dei Materialichemistry0210 nano-technologypolypropyleneRecycling
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Generation and Coherent Control of Pulsed Quantum Frequency Combs

2018

We present a method for the generation and coherent manipulation of pulsed quantum frequency combs. Until now, methods of preparing high-dimensional states on-chip in a practical way have remained elusive due to the increasing complexity of the quantum circuitry needed to prepare and process such states. Here, we outline how high-dimensional, frequency-bin entangled, two-photon states can be generated at a stable, high generation rate by using a nested-cavity, actively mode-locked excitation of a nonlinear micro-cavity. This technique is used to produce pulsed quantum frequency combs. Moreover, we present how the quantum states can be coherently manipulated using standard telecommunications…

0301 basic medicineDensity matrixOptics and PhotonicsPhotonGeneral Chemical EngineeringSettore ING-INF/01 - ElettronicaGeneral Biochemistry Genetics and Molecular Biology03 medical and health sciencesEngineering0302 clinical medicineQuantum stateQuantum DotsQuantumQCQuantum opticsPhysicsGeneral Immunology and Microbiologybusiness.industryGeneral NeuroscienceNonlinear opticsSettore ING-INF/02 - Campi Elettromagnetici030104 developmental biologyCoherent controlQuantum optics Integrated photonic devices Mode-locked lasers Nonlinear optics Four-wave mixing Frequency combs High- dimensional statesFrequency domainOptoelectronicsbusiness030217 neurology & neurosurgeryJournal of Visualized Experiments
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Use of code-mixing by young hearing children of Deaf parents

2016

In this study we followed the characteristics and use of code-mixing by eight KODAs – hearing children of Deaf parents – from the age of 12 to 36 months. The children's interaction was video-recorded twice a year during three different play sessions: with their Deaf parent, with the Deaf parent and a hearing adult, and with the hearing adult alone. Additionally, data were collected on the children's overall language development in both sign language and spoken language. Our results showed that the children preferred to produce code-blends – simultaneous production of semantically congruent signs and words – in a way that was in accordance with the morphosyntactic structure of both languages…

060201 languages & linguisticsLinguistics and Language05 social sciencesBimodal bilingualism06 humanities and the artsSign language050105 experimental psychologyLanguage and LinguisticsEducationCode-mixingDevelopmental psychologyLanguage developmentcode-mixingbimodal bilingualism0602 languages and literatureotorhinolaryngologic diseases0501 psychology and cognitive sciencesta516PsychologySpoken languageKODABilingualism: Language and Cognition
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Thermomineral waters of Greece: geochemical characterization

2020

75 °C). In terms of pH most results vary from 5.5 to 823 °C) ii) warm (23 40 °C) iii) thermal (40 75 °C) and iv) hyperthermal (&gtfew springs show either very low pH (&lt10) proposing serpentinization processes. Regarding TDS concentrations collected waters can be subdivided into low salinity (up to 1.5 g/L) brackish (up to 20 g/L) and saline (up to 43 g/L). The medium high salinities can be justified by mixing with sea water and/or strong waterrock interaction processes. Isotope composition of O and H ranges from 12.7 to +2.7 ‰ SMOW and from 91 to +12 ‰ SMOW respectively and is generally comprised between the Global Meteoric Water Line and the East Mediterranean Meteoric Water Line. Only few water samples show a positive shift for δ18O possibly related to high temperature waterrock interaction processes. Carbon dioxide (18 997000 μmol/mol) or N2 (1100 989000 μmol/mol) or CH4 (&ltMany geothermal areas of Greece are located in regions affected by Miocene or Quaternary volcanism and in continental basins characterised by elevated heat flow. Moreover the majority of them is found along the coast as well as in islands of the Aegean Sea and thus thermal water is often brackish to saline due to marine intrusion into costal aquifer. In the present study almost 300 thermal and cold mineral water samples were collected along the Hellenic territory with their physicochemical parameters (temperature pH electrical conductivity and Eh) and the amount of bicarbonates (titration with 0.1N HCl) being determined in situ. Additionally gases found either in free or dissolved phase were sampled. Both water and gas samples were analysed at the INGVPa laboratories for major ions (Ion Chromatography) silica (Inductively Coupled Plasma Optical Emission Spectrometry) chemical composition of free and dissolved gases (Gas Chromatography) water isotopes (O and H) and carbon and helium isotopes of free and dissolved gases (Mass Spectrometry). The temperature of the investigated waters ranges from 6.5 to 98°C pH from 1.96 to 11.98 whilst Total Dissolved Solids (TDS) from 0.06 to 43 g/L. Based on the temperature parameter waters can be divided into four groups: i) cold (&lt0.5 913000 μmol/mol) are the prevailing gas species found in the studied sites. The δ13CCO2 values ranged from 20.1 to +8.5 ‰ whilst the isotope ratio of He from 0.21 to 6.71 R/RA.4) suggesting interaction with H2Srich gases or very high pH values (&gtSettore GEO/08 - Geochimica E Vulcanologia
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Vector FWM in optical fibers: tuning techniques and applications

2022

Recientemente, el efecto no lineal de mezcla de cuatro ondas (FWM) en fibras ópticas ha atraído un gran interés para el desarrollo de nuevas fuentes de luz de fibra óptica debido a la emisión de luz múltiple producida por este efecto no lineal. En los últimos años, estas fuentes de luz basadas en FWM han demostrado una gran utilidad en áreas como la óptica cuántica y la microscopía avanzada basada en efecto Raman. Además, según el estado de polarización de la luz de bombeo responsable del efecto FWM y la birrefringencia de la fibra, la luz producida por FWM puede presentar diferentes propiedades de polarización dada la naturaleza vectorial de FWM. Esto posibilita el diseño y desarrollo de f…

:FÍSICA [UNESCO]polarization modulation instabilityUNESCO::FÍSICAtunable light sourcemicrostructured optical fibersvector four-wave mixing
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Con otro acento. El spanglish visto desde esta orilla

2016

Este libro colectivo proyecta una mirada distinta, abierta y crítica sobre las actitudes lingüísticas de una sociedad heterogénea y multicultural que vive en los Estados Unidos, los hispanounidenses. Un rasgo lingüístico, utilizado por buena parte de estos latinos, es el cambio de código, que se considera entre los aspectos más característicos del llamado popularmente spanglish. Cada uno de los trabajos recogidos en este volumen aporta un enfoque diferente y un tratamiento diferenciado del tema, configurando así una investigación polifónica sobre el spanglish. Es una obra fruto de la naturaleza polimórfica y poliédrica del tema en la que las varias voces se encuentran, se enlazan, se oponen…

:LINGÜÍSTICA [UNESCO]UNESCO::LINGÜÍSTICAspanglish Estados Unidos identidad mestiza melting pot code-switching code-mixing lenguas en contacto
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Observaciones sobre la sintaxis del espanglish

2018

Se abordan en este trabajo cuestiones relacionadas con las características sintácticas más destacables del espanglish FFI2017-84951-P This paper addresses issues related to the most salient syntactic features of Spanglish

:LINGÜÍSTICA [UNESCO]code-mixingespanglishsintaxiscode-switchingUNESCO::LINGÜÍSTICA
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Quantum well intermixing in GaInNAs/GaAs structures

2003

We report on the characteristics of quantum well intermixing in GaInNAs/GaAs structures of differing N content. Rapid thermal annealing combined with SiO2 caps deposited on the surface of the samples is used to disorder 1.3 mum GaInNAs/GaAs multiquantum wells which have been preannealed in-situ to the stage of blueshift saturation. The different effects of two capping layer deposition techniques on the interdiffusion of In-Ga have been compared, particular regarding the role of sputtering processes. The dependence of quantum well intermixing-induced photoluminescence blueshift on N concentration has provided extra information on the intrinsic properties of the GaInNAs/GaAs material system. …

:Science::Physics::Optics and light [DRNTU]Materials sciencePhotoluminescencebusiness.industryAlloyGeneral Physics and Astronomyengineering.materialSettore ING-INF/01 - ElettronicaBlueshiftGallium arsenidechemistry.chemical_compoundchemistrySputteringQuantum well intermixing GaInNAsengineeringOptoelectronicsRapid thermal annealingbusinessSaturation (magnetic)Quantum well
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Globorotalia truncatulinoides in the Mediterranean Basin during the Middle–Late Holocene: Bio-Chronological and Oceanographic Indicator

2022

The planktonic foraminiferal species Globorotalia truncatulinoides is widely used as a biostratigraphic proxy for the Quaternary in the Mediterranean region. High-resolution quantitative studies performed on sediment cores collected in the central and western Mediterranean Sea evidence a significant abundance of G. truncatulinoides during the Middle Holocene. The robust chronological frame allows us to date this bio-event to 4.8–4.4 ka Before Present (BP), very close to the base of the Meghalayan stage (4.2 ka BP). As a consequence, we propose that G. truncatulinoides can be considered a potential marker for the Middle–Late Holocene chronological subdivision. G. truncatulinoides is a deep-d…

<i>Globorotalia truncatulinoides</i>; Meghalayan stage; 4.2 event; vertical mixing; Mediterranean SeaGloborotalia truncatulinoides4.2 eventGloborotalia truncatulinoides; Meghalayan stage; 4.2 event; vertical mixing; Mediterranean Seavertical mixingMediterranean SeaGeneral Earth and Planetary SciencesMeghalayan stageSettore GEO/01 - Paleontologia E Paleoecologia
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Factors controlling planktonic size spectral responses to autumnal circulation in a Mediterranean lake

2006

14 pages, and figures, and tables statistics.

Abiotic componentEcologyMixed layerfungiFood websCascading effectsAquatic SciencePlanktonMixing depthFood webOceanographyPhytoplanktonPhysical forcingEnvironmental scienceFactor interactionTrophic cascadeHydrobiologyTrophic levelFreshwater Biology
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