Search results for " Misure"
showing 10 items of 421 documents
Application of the ESR spectroscopy to estimate the original dose in irradiated chicken bone
2007
Abstract The paper discusses the results of an investigation aimed to use the ESR spectroscopy as a quantitative procedure to estimate the original dose in irradiated chicken. The time stability of the ESR signal was at first carried out, to obtain a correction factor to be applied to the dose estimated with the added dose method. Our results show that this procedure gives an estimation of the original dose within ±25%.
Progettazione di un irradiatore autocontenuto per la calibrazione di dosimetri personali a termoluminescenza
2016
I dosimetri a termoluminescenza utilizzati nel campo della dosimetria personale necessitano – per un loro corretto impiego - di una preventiva fase di calibrazione, realizzata con dose-rate compresi tra 2,5 10-4 mGy/h e 0,01 mGy/h. Per ottenere valori di dose-rate in tale range, si è progettato un irradiatore autocontenuto e autoschermato di piccole dimensioni, utilizzante una sorgente di bassa attività.
UN IRRADIATORE NEUTRONICO MODULARE CON SORGENTI DI 241Am-Be PER IL TEST DI DOSIMETRI NEUTRONICI PERSONALI
2010
Irradiatori neutronici basati su sorgenti radionuclidiche sono impiegati in diversi paesi per l’analisi per attivazione di vari campioni, per studiare le caratteristiche dei materiali sottoposti a irradiazione, ma anche per studiare la risposta di rivelatori e/o dosimetri personali sensibili alla componente neutronica. Per quest’ultima applicazione, l’uso di un irradiatore con sorgenti risulta molto vantaggioso per la stabilità nel tempo del flusso neutronico, mentre è relativamente poco importante il valore assoluto del flusso neutronico, di qualche ordine di grandezza inferiore a quello di reattori o di acceleratori di particelle. Per l’effettuazione di test su rivelatori e/o dosimetri pe…
Study and development of innovative measurement methods and systems for anti-islanding protection in smart grids
2014
Un metodo ibrido per il riconoscimento dell'islanding in reti di media e bassa tensione in presenza di generazione distribuita
2013
Immigrati e discriminazioni nel settore della sicurezza sociale: sulle provvidenze a sostegno di famiglia e genitorialità la Corte costituzionale sol…
2020
Il saggio analizza una recente ordinanza di rimessione alla Corte di Giustizia da parte della Corte Costituzionale, circa la compatibilità o meno delle misure a sostegno della famiglia erogate a immigrati extracomunitari col sistema giuridico europeo di sicurezza sociale. The essay analyses a recent order of the Italian Constitutional Court, asking the Court of Justice to verify the compatibility of domestic family allowances granted to immigrants with the EU legal framework on social security.
Design of an open-lab activity for engineering students: A case study
2022
Project- or discovery-based learning activities promote curiosity, enjoyment, and interest deriving from the stimulating context in which students operate. Providing a concrete contextualization of laboratory activities could improve student motivation and learning outcomes. In this contribution, a case study related to a workshop on laboratory activities proposed for Engineering Master students is presented, and designed with the aim of developing practical competencies, increasing problem-solving skills, and providing design abilities. Using the facilities available in the Measurements and Control Laboratory, the students, starting from concept knowledge acquired in basic subjects, such …
Assisted software design of a wide variety of windings in rotating electrical machinery
2014
In this paper a software developed by the Authors for winding design is presented. In particular, this software can be used as a valid aid in design and analysis for a wide variety of windings with generic number of phases, pole pairs, slot number, etc.. The calculation of winding factors and the evaluation of their harmonic distribution is also accomplished. The software is implemented in MATLAB® environment. By means of some examples, covering the most relevant winding types, the capabilities of this software will be shown. Particularly, integer and fractional slot, single and double layer winding, concentrated windings, imbrication, belt widening and belt shifting techniques can be treat…
Maximum Torque per Ampere Control strategy for low-saliency ratio IPMSMs
2019
This paper deals with electrical drives employing low-saliency ratio interior permanent magnet synchronous motors. In particular, in order to help the designers choosing the best control algorithm, the performances of the Maximum Torque Per Ampere Control (MTPA) and the Field Orientation Control (FOC) are here both theoretically and experimentally assessed and compared, by using, as performance indicators, the torque-current ratio and the power losses. The tests are carried out on a low-power motor for various speeds and loads by implementing the two control strategies in a dSPACE® rapid prototyping system. The results show that the Maximum Torque Per Ampere algorithm has some appreciable a…
Modeling Right Ventricle Failure After Continuous Flow Left Ventricular Assist Device: A Biventricular Finite-Element and Lumped-Parameter Analysis
2017
The risk of right ventricle (RV) failure remains a major contraindication for continuous-flow left ventricular assist device (CF-LVAD) implantation in patients with heart failure. It is therefore critical to identify the patients who will benefit from early intervention to avoid adverse outcomes. We sought to advance the computational modeling description of the mechanisms underlying RV failure in LVAD-supported patients. RV failure was studied by computational modeling of hemodynamic and cardiac mechanics using lumped-parameter and biventricular finite element (FE) analysis. Findings were validated by comparison of bi-dimensional speckle-tracking echocardiographic strain assessment of the …