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Torque Estimation of Synchronous Reluctance Machine using High Frequency Signal Injection
Get PDFIl lavoro analizza due metodi per la stima della coppia prodotta da un motore sincrono a riluttanza, entrambi basati sull'iniezione di un segnale rotante di tensione ad alta frequenza sovrapposto al segnale sincrono alimentante il motore. A partire dal processo dei segnali ad alta frequenza si ottengono le induttanze ad alta freq e attraverso l'equazione di coppia si ottiene la sua stima. Sono state effettuate una simulazione in Simulink e un test sperimentale su un motore commerciale dell'ABB
Micro-Channel Arrays by Two Photon Lithography for Cell Migration Studies
No full textMetastasis is a dynamic process in which cancer cells begin to move. Understanding how these cells acquire increased motility is a stimulating and necessary goal. The goal of this thesis is to produce a microfluidic device that allows the study of chemotaxis of Neuroblastoma cells and the device was fabricated using an innovative two-photon polymerization (2PP) technology
Analisi di istanze di valutazione dei progetti mediante l'uso di soluzioni conformi del codice di prevenzione incendi. Confronto delle soluzioni adottate rispetto ai limiti di inviluppo
Get PDFLa prevenzione incendi, con l'entrata in vigore del D.M. 18/10/2019, mira ad evolversi in una vera e propria disciplina progettuale, con un rafforzamento della figura del professionista antincendio. Dato il prevalente ricorso alle soluzioni conformi, il presente lavoro propone un approccio metodologico innovativo per la visualizzazione e l'analisi immediata dei set di soluzioni impiegati dai professionisti
Studio di procedure di minimizzazione con gradiente deformato Study of function minimization with a distorted gradient
Get PDFQuesta tesi tratta lo studio dell'utilizzo di una trasformazione del gradiente (elevazione a potenza) in un algoritmo di minimizzazione semplice applicato ad un parbolide.
Si tratta di un primo passo per la caratterizzazione di questo nuovo metoto da poi utilizzare in algoritmi più compicati e per ogni tipo di funzione.
Abstract inglese : This thesis treats the study of a transformation of the gradient (power gradient) used in a minimization algorithm applied to a paraboloid.
This is the first step for a characterization of this new method, which is to use in more complicated algorithm an applied to any type of functions
Un’analisi delle cause della subsidenza nell’area della bassa pianura veneto-friulana attraverso tecniche di interferometria satellitare e caratterizzazione geotecnica.
Get PDFAuditor indipendence challenges and establishing an oversight organization indipendent of profession in comparison with european regulations
Get PDFCharacterization and tests of 39 channels of the JUNO large PMT electronics
Get PDFThe Jiangmen Underground Neutrino Observatory (JUNO) is a multi-purpose neutrino experiment under construction in South China. It will make use of 20 kton of highly transparent liquid scintillator (Linear Alkyl-Benzene) contained in an acrylic sphere surrounded by 18000 20" PMTs and 25000 3" PMTs, respectively, aiming at an energy resolution better than 3% at 1 MeV. JUNO is expected to resolve the neutrino mass hierarchy, significantly improve accuracy of the solar oscillation parameters and make a significant impact to several other Neutrino Physics topics. The JUNO Padova research unit is responsible for the design and development of the large PMT readout electronics; in order to verify its performances, a small JUNO mock-up system, equipped with 48 small size PMTs reading out the light generated by a 20 liter liquid scintillator detector, has been assembled and setup at the Legnaro INFN National Laboratories (LNL). Within this context, my thesis work concerns the development of a software for the processing and the analysis of the readout data of the test system at LNL and the evaluation of the performances of the full JUNO electronics chain. In particular, the first part of my thesis focuses on the development of a ROOT based program whose main task is reading the binary files produced by the DAQ system and extracting all the information they provide, such as, for example, the event timestamps or the acquired signal waveforms; this information, in addition to some other important characteristics of the acquired signals, such as the baseline contribution or the integrated charge, is then stored in ROOT files for further elaboration. Another important activity of my thesis work concerns the development of several methods for data quality monitoring of the experimental setup; these methods include in particular a study on the stability, over a long period of time, of the trigger rate and of the baseline contribution to the signals. The data quality monitoring is performed by means of some ROOT based programs, which are developed for this purpose and properly optimised using data acquired in several long term acquisition runs. Furthermore, studies on time correlation and synchronization of signals coming from different PMTs are carried out; these signals are acquired in runs with an external trigger on cosmic muons, generated by three external plastic scintillators. These studies are useful in defining a specific procedure for reconstructing the total charge released by these particles in the liquid scintillator; a detailed analysis of the resulting spectrum allows to obtain, after a careful comparison with the expectation based on theoretical calculations and Monte Carlo simulations, some important results on the evaluation of the setup response. Finally, some additional analyses concerning a more detailed calibration of the apparatus are presented and discussed
Infrared Production of Gravitinos
Get PDFAccording to observations, most matter density of our Universe is dark. Efforts have been done to explain this excess,
ranging from alternative theories of gravity, to the introduction of new particles and many other exotic suggestions.
Nowadays most of the scientific community agrees on the fact that dark matter is at least partially made of a new particle species,
underlying the presence of new physics beyond the Standard Model. In this work we present a possible solution to the dark matter dilemma,
showing how \textit{gravitino} can be a good particle candidate solving the problem. Exploiting the properties of this particular particle,
we show under what assumptions \textit{freeze-in} mechanism could be the appropriate mechanism for gravitino relic density achievement.
We focus on the consequences of a non-instantaneous reheating process on the gravitino relic density production,
recovering and extending already existing works, showing under what assumptions this process is still able to solve the dark matter problem
