Search results for "sperimentale"
showing 10 items of 938 documents
Dosimetria EPR con alanina per fasci di protoni per adronterapia
2013
Agarose and PVA Fricke gel dosimeters exposed to clinical photons beams: Nuclear Magnetic Resonance Relaxometry and Imaging
2015
Fricke Xylenol Gel (FXG) dosimetric system is based on the radiation induced oxidation of ferrous (Fe2+) to ferric (Fe3+) ions. The application of Fricke gels for ionizing radiation dosimetry is continuously increasing worldwide due to their many favorable properties. However, one of their shortcomings is that ferrous and ferric ions diffuse in the gel matrix. To maintain the spatial integrity of the dose distribution, Fricke gels must be undergoing measurement within a few hours of their irradiation, so that ferric ions remain close to their point of production. Thus, the spatial integrity of the dose distribution in the Fricke gel is maintained. The gel matrix also contributes to the oxid…
Progettazione e valutazione inclusiva con gli EAS Metodologie, ricerche e strumenti
2022
Il testo affronta il tema della didattica inclusiva per Episodi di Apprendimento Situato (EAS), dispositivo metodologico in grado di professionalizzare le pratiche degli insegnanti e rendere gli allievi centro dei loro apprendimenti. A partire da una prima parte metodologico-applicativa, il lavoro è integrato da una sperimentazione condotta in due contesti inclusivi differenti: le scuole speciali in Spagna (CEE) e la scuola ordinaria italiana. In entrambi i contesti, al termine del percorso di sperimentazione, si è evidenziato un miglioramento auto-percepito delle competenze metodologiche e digitali possedute dagli insegnanti.
Condizioni per l’incidenza della ricerca didattica nel miglioramento della scuola
2018
Il dibattito in corso sull’ Evidence Based Education (EBE) dimostra come la questione della cumulabilità delle conoscenze didattiche sia particolarmente sentita da coloro che si occupano di ricerca empirica in campo scolastico. E’ avvertita l’esigenza di fare il punto su quanto nella comunità scientifica si sa, con un’accettabile certezza, su un determinato tema, senza dover ogni volta ripartire da zero. Il problema è formulabile in questi termini: fino a che punto e a quali condizioni è possibile cumulare i risultati delle ricerche empiriche in campo didattico, per ricavare da essi utili indicazioni per le azioni degli insegnanti, che auspicabilmente dovrebbero essere coinvolti dai ricerca…
La corresponsabilità educativa scuola-famiglia-società e la prospettiva montessoriana: per un ritorno all’autenticità del fatto educativo
2020
The paper focuses on the connection between the Montessori principles related to child edu-cation and the school-family educational co-responsibility for the common construction of meaning.This combination can represent a keystone of school architecture for the authenticity of the educational fact. A practical-operational tool is the school-family educational pact. A survey has shown the correlation and the practical implications of the twoaspects according to teachers and parents.
Dosimetria ESR con alanina per adronterapia per protoni e ioni carbonio
2014
Electron Spin Resonance (ESR) dosimetry for clinical radiation beams.
2016
In the last two decades the electron spin resonance (ESR) technique has been widely adopted for dosimetry of the radiation beams used in radiation therapy. In particular, alanine dosimtery is nowadays recognized as an international standard system for transfer dosimetry and for high doses. This is because among the various solid-state dosimeters the alanine ESR detectors present several advantages such as: tissue equivalence, linearity of its dose-response over a wide range, high stability of radiation induced free radicals, no destructive read-out procedure, no sample treatment before EPR signal measurement. In this presentation the main applications of ESR dosimetry for the characterizati…
Uso della spettroscopia ESR per la caratterizzazione di composti fenolici irradiati con fasci clinici di fotoni ed elettroni
2016
In the last decades several research laboratories have shown an increasing interest aimed at extending the applicability of Electron Spin Resonance (ESR) dosimetry to radiotherapy with different types of radiation beams. ESR is a spectroscopic method for investigating the structure and dynamics of such paramagnetic species. Free radicals are known to be produced when a compound is irradiated with ionizing radiations. The concentration of radiation-induced free radicals is proportional to the energy released inside in the medium and this allows for dosimetric measurements through ESR technique which able to quantitatively determine the radical concentration. The use of alanine as a dosimetri…
Neutron Electron Spin Resonance dosimetry with phenol compounds
2014
Nuove frontiere per la dosimetria ESR per fasci clinici di fotoni ed elettroni: i composti fenolici IRGANOX® 1076. (Characterization of phenolic soli…
2017
This work deals with the dosimetric features of a particular phenolic compound (IRGANOX 1076®) for dosimetry of clinical photon and electron beams by using Electron Spin Resonance (ESR) spectroscopy. After the optimization of the ESR readout parameters (namely modulation amplitude and microwave power) to maximise the signal without excessive spectrum distortions, basic dosimetric properties of laboratory-made phenolic dosimeters in pellet form, such as reproducibility, dose-response, sensitivity, linearity and dose rate dependence were investigated. The dosimeters were tested by measuring the depth dose profile of a 6 MV photon beam. A satisfactory intra-batch reproducibility of the ESR sig…