Search results for "Processi"

showing 10 items of 9638 documents

Learning strategies, decision-making styles and conscious use of technologies in initial teacher education

2018

The aim of this research is to develop a toolkit enabling to observe transversal skills of future teachers. The research was carried out with 236 students attending the Educational Technologies course at the Primary Education program at Palermo University, during academic year 2017/2018. The research hypothesis is that the knowledge of the initial situation of students, as much objective as possible, requires triangulation, comparison and integration of the information collected with three self-assessment tools. An Italian toolkit is now available. It allows to detect the following, at the beginning of the university course: (i) how students integrate ICT with disciplinary contents and teac…

initial teacher educationself-assessmentformazione iniziale docentiLearning Processes QuestionnaireDecision-Making Styles Questionnaireself-assessment.TPACKinitial teacher education; TPACK; Learning Processes Questionnaire; Decision-Making Styles Questionnaire; self-assessmentQuestionario sui Processi di Apprendimento-QPAlcsh:LQuestionario sulla Tipologia Decisionale-QTDautovalutazione.Settore M-PED/03 - Didattica E Pedagogia Specialelcsh:Education
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Creation of glass-characteristic point defects in crystalline SiO2 by 2.5 MeV electrons and by fast neutrons

2019

The support from M -ERANET project “MyND” is acknowledged. K.K. was partially supported by the Collaborative Research Project of Laboratory for Materials and Structures, Tokyo Institute of Technology . Visiting researcher support from Ecole Polytechnique, Palaiseau is appreciated. Mr. Olivier Cavani is thanked for the expert help with irradiations.

inorganic chemicalsLuminescenceMaterials science02 engineering and technologyCrystal structure01 natural sciencesMolecular physicsCrystal0103 physical sciences:NATURAL SCIENCES:Physics [Research Subject Categories]Materials ChemistryElectron beam processingIrradiationDangling bonds[PHYS]Physics [physics]010302 applied physicstechnology industry and agricultureDangling bondElectron irradiationQuartz021001 nanoscience & nanotechnologyCondensed Matter PhysicsCrystallographic defectAmorphizationNeutron temperatureElectronic Optical and Magnetic MaterialsAmorphous solidCeramics and CompositesSilica glass0210 nano-technologyJournal of Non-Crystalline Solids
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Optical Properties of Natural and Synthetic Minerals

2015

The results of investigation of optical absorption and photoluminescence (PL) of topaz, beryl and yttrium aluminium garnet crystals doped with different concentrations of transition ions exposed to fast neutron irradiation and electron irradiation are presented. We suppose that irradiation leads to the formation of two types of complex centers: "Me2+-F+ (or F) centre" and complex centers, which consist of a cation vacancy and an impurity (iron, manganese and chromium) ion. Exchange interaction between radiation defects and impurity ions during neutron or electron irradiation gives rise to appearance of additional absorption and luminescence band broadening in investigated crystals.

inorganic chemicalsMaterials sciencePhotoluminescenceAbsorption spectroscopyAnalytical chemistrytechnology industry and agriculturechemistry.chemical_compoundCondensed Matter::Materials SciencechemistryYttrium aluminium garnetImpurityVacancy defectElectron beam processingPhysics::Atomic and Molecular ClustersIrradiationAbsorption (chemistry)inorganic compounds; absorption spectra; photoluminescence; neutron irradiationNuclear chemistryEnvironment. Technology. Resources.
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Optical Properties of Irradiated Yttrium Aluminum Garnet

2012

The results of investigation of the photoluminescence (PL) and optical absorption of crystals Y3Al5O12(YAG) doped with different concentrations of manganese ions exposed to fast neutron irradiation and electron irradiation are presented. Photoluminescence spectra of YAG before neutron irradiation at T=80 K contain fine lines in orange region of spectrum, ascribed to Mn2+ ions in octahedral position. After irradiation band broadening is observed in the luminescence spectra of garnet crystals. Electron irradiation produced broad band with a complex structure related to Mn4+ ions. Exchange interaction between radiation defect and impurity ions during neutron irradiation and electron irradiatio…

inorganic chemicalsMaterials sciencePhotoluminescencePhysics::Instrumentation and DetectorsDopingAnalytical chemistryPhysics::Opticschemistry.chemical_elementYttriumSpectral lineIonCondensed Matter::Materials SciencechemistryElectron beam processingIrradiationLuminescenceNuclear chemistryIOP Conference Series: Materials Science and Engineering
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Influence of radiation defects on tritium release parameters from Li2O

1998

Abstract The study of the influence of radiation defects on tritium release behavior from polycrystalline Li2O was performed by simultaneous measurements of the luminescence emission and tritium release. It was found that the radiation defects in Li2O introduced by electron irradiation cause the retention of tritium. It is thought that the tritium recovery is affected by the formation of a Li–T bond, which is tolerant of high temperatures. The retardation of tritium decreases with increasing absorbed dose in the dose range from 50 to 140 MGy. The aggregation of radiation defects at high irradiation doses is considered to be responsible for the decrease of the interaction of tritium with rad…

inorganic chemicalsMaterials scienceorganic chemicalsMechanical EngineeringRadiochemistryRadiationFusion powerThermoluminescenceNuclear Energy and EngineeringAbsorbed dosecardiovascular systempolycyclic compoundsElectron beam processingGeneral Materials ScienceTritiumIrradiationLuminescenceCivil and Structural EngineeringFusion Engineering and Design
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IP 3 signalling regulates exogenous RNA i in C aenorhabditis elegans

2015

RNA interference (RNAi) is a widespread and widely exploited phenomenon. Here, we show that changing inositol 1,4,5-trisphosphate (IP3) signalling alters RNAi sensitivity in Caenorhabditis elegans. Reducing IP3 signalling enhances sensitivity to RNAi in a broad range of genes and tissues. Conversely up-regulating IP3 signalling decreases sensitivity. Tissue-specific rescue experiments suggest IP3 functions in the intestine. We also exploit IP3 signalling mutants to further enhance the sensitivity of RNAi hypersensitive strains. These results demonstrate that conserved cell signalling pathways can modify RNAi responses, implying that RNAi responses may be influenced by an animal's physiology…

inorganic chemicalscalcium signallingCell signalingMutantInositol 145-TrisphosphateBiologyModels BiologicalBiochemistryRNA interferenceRNA interferenceImage Processing Computer-AssistedGeneticsAnimalsIntestinal MucosaCaenorhabditis elegansMolecular BiologyCaenorhabditis elegansRNA Double-StrandedCalcium signalingenhanced RNAiScientific Reportsfungiinositol 145‐trisphosphateRNAbiology.organism_classificationC. elegansCell biologySignallingMicroscopy FluorescenceSignal transductionSignal TransductionEMBO reports
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VERS UNE ARCHITECTURE UNIFIÉE ET ZÉRO TEMPS MORT POUR L'INSTRUMENTATION NUCLÉAIRE

2014

National audience; Dans l’instrumentation nucléaire, et d’autres domaines tels que les applications de la physique des particules, l’analyse de signaux médicaux (Tomographie par Emission de Positons (TEP), Electro-EncephaloGraphie (EEG)) ou la détection de signaux radar, le signal mesuré est composé d’impulsions dont la date d’arrivée est aléatoire, et dont l’amplitude et la durée sont non-d´eterministes. La grande variété d’applications nécessite de disposer d’une architecture flexible pouvant être aisément reprogrammée. De plus, l’exigence de mesures en temps réel impose de disposer d’une grande capacité de calcul et de bande passante pour la mise en forme et l’extraction des caractéristi…

instrumentation[INFO.INFO-AR]Computer Science [cs]/Hardware Architecture [cs.AR][INFO.INFO-AR] Computer Science [cs]/Hardware Architecture [cs.AR][ INFO.INFO-TS ] Computer Science [cs]/Signal and Image Processing[INFO.INFO-TS] Computer Science [cs]/Signal and Image ProcessingDigital Pulse Processing[SPI.TRON] Engineering Sciences [physics]/Electronicselectronic architecture[ SPI.TRON ] Engineering Sciences [physics]/Electronics[SPI.TRON]Engineering Sciences [physics]/Electronicsreal time measurementimpulse separation[INFO.INFO-TS]Computer Science [cs]/Signal and Image ProcessingDigital Signal Processing[ INFO.INFO-AR ] Computer Science [cs]/Hardware Architecture [cs.AR]Digital Architecturesignal processingnuclear instrumentation
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Vers une architecture électronique unifiée et zéro temps mort pour l'instrumentation nucléaire

2014

International audience; Dans l'instrumentation nucléaire, et d'autres domaines tels que les applications de la physique des particules, l'analyse de signaux médicaux (Tomographie par Émission de Positons (TEP), Électro-EncéphaloGraphie (EEG)) ou la détection de signaux radar, le signal mesuré est composé d'impulsions dont la date d'arrivée est aléatoire, et dont l'amplitude et la durée sont non déterministes. La grande variété d'applications nécessite de disposer d'une architecture flexible pouvant être aisément reprogrammée. De plus, l'exigence de mesures en temps réel impose de disposer d'une grande capacité de calcul et de bande passante pour la mise en forme et l'extraction des caractér…

instrumentation[INFO.INFO-AR]Computer Science [cs]/Hardware Architecture [cs.AR][INFO.INFO-AR] Computer Science [cs]/Hardware Architecture [cs.AR]detectorElectronic architectureimpulse processingspectrum analysis[PHYS.PHYS.PHYS-INS-DET] Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det]sensor[PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det][ INFO.INFO-AR ] Computer Science [cs]/Hardware Architecture [cs.AR]real time processingsignal processingnuclear instrumentation
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On modified α-ϕ-fuzzy contractive mappings and an application to integral equations

2016

Abstract We introduce the notion of a modified α-ϕ-fuzzy contractive mapping and prove some results in fuzzy metric spaces for such kind of mappings. The theorems presented provide a generalization of some interesting results in the literature. Two examples and an application to integral equations are given to illustrate the usability of our theory.

integral equationsGeneralization02 engineering and technologyFixed point01 natural sciencesFuzzy logicSettore MAT/05 - Analisi Matematica0202 electrical engineering electronic engineering information engineeringmodified α-ϕ-fuzzy contractive mappingDiscrete Mathematics and Combinatorics0101 mathematicsα-admissible mapping with respect to ηMathematicsDiscrete mathematicsbusiness.industryApplied Mathematicslcsh:MathematicsUsabilitylcsh:QA1-939Integral equationFuzzy metric space010101 applied mathematicsAlgebraintegral equationfixed point020201 artificial intelligence & image processing$alpha$-admissible mapping with respect to $eta$ fixed point modified $alpha$-$phi$-fuzzy contractive mapping integral equationsbusinessAnalysisJournal of Inequalities and Applications
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Multi-parameter analysis of the obstacle scattering problem

2022

Abstract We consider the acoustic field scattered by a bounded impenetrable obstacle and we study its dependence upon a certain set of parameters. As usual, the problem is modeled by an exterior Dirichlet problem for the Helmholtz equation Δu + k 2 u = 0. We show that the solution u and its far field pattern u ∞ depend real analytically on the shape of the obstacle, the wave number k, and the Dirichlet datum. We also prove a similar result for the corresponding Dirichlet-to-Neumann map.

integral equationsshape sensitivity analysisassociated exterior Dirichlet problemDirichlet-to-Neumann operatorApplied MathematicsHelmholtz equation; acoustic scattering; associated exterior Dirichlet problem; Dirichlet-to-Neumann operator; shape sensitivity analysis; perturbed domain; integral equationsacoustic scatteringComputer Science ApplicationsTheoretical Computer Scienceperturbed domainMathematics - Analysis of PDEsSettore MAT/05 - Analisi MatematicaSignal ProcessingFOS: Mathematicsacoustic scattering; associated exterior Dirichlet problem; Dirichlet-to-Neumann operator; Helmholtz equation; integral equations; perturbed domain; shape sensitivity analysisHelmholtz equation35J25 35J05 35P25 31B10 45A05Mathematical PhysicsAnalysis of PDEs (math.AP)
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