Relevant bibliographies by topics / SCUOLA DI DOTTORATO DI RICERCA IN FISICA / Dissertations / Theses
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Dissertations / Theses on the topic 'SCUOLA DI DOTTORATO DI RICERCA IN FISICA'

Author: Grafiati
Published: 11 March 2023
Last updated: 31 July 2025

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1

Pakdast, Seid Hossein. "Advanced MEMS resonator for mass detection and micromechanical transistor." Doctoral thesis, Università degli studi di Trieste, 2012. http://hdl.handle.net/10077/6690.

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2010/2011<br>Cantilever sensors have been the subject of growing attention in the last decades and their use as mass detectors proved with attogram sensitivity. The rush towards the detection of mass of few molecules pushed the development of more sensitive devices, which have been pursued mainly through downscaling of the cantilever-based devices. In the field of mass sensing, the performance of microcantilever sensors could be increased by using an array of mechanically coupled micro cantilevers of identical size. In this thesis, we propose three mechanically coupled identical cantilever
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2

Fan, Xi Long. "Galaxy evolution by chemical and SED model." Doctoral thesis, Università degli studi di Trieste, 2012. http://hdl.handle.net/10077/7429.

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2010/2011<br>In this thesis, we have studied the ISM, QSO, LGRB hosts and LBGs by galactic chemical evolution and spectro-photometric models. We also tested the so-called mono- lithic scenario of elliptical galaxies formation. Here we present the main results of this work: 1. The star formation history is the main driver of galaxy evolution. The predictions of elliptical chemical evolution models with the so-called monolithic scenario of elliptical galaxies formation are consistent with the data of high redshift LBGs and QSOs. Both the infall and the star formation timescale are suggeste
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3

Formato, Valerio. "Measurement of the nuclear and isotopic composition of galactic cosmic rays with the PAMELA experiment." Doctoral thesis, Università degli studi di Trieste, 2014. http://hdl.handle.net/10077/9962.

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2012/2013<br>This thesis describes the study of the isotopes of hydrogen and helium and of the boron and carbon nuclei in the cosmic radiation. New measurements of the fluxes of 1H, 2H, 3He, 4He, between 120 MeV/n and 900 MeV/n, and of the boron and carbon fluxes, between 400 MeV/n and 120 GeV/n, are presented at the top of the atmosphere. The measurements were made with the space-borne PAMELA experiment from July 2006 to March 2008, that is during a period of minimum solar activity and negative solar magnetic field polarity. Such measurements can help in achieving a more detailed knowledge of
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Candelise, Vieri. "Measurement of the associated productionof a Z boson and b quarksin proton-proton collisions at √s = 8 TeVwith the CMS experiment at LHC." Doctoral thesis, Università degli studi di Trieste, 2014. http://hdl.handle.net/10077/9960.

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2012/2013<br>The aim of the thesis work is the measurement of the associated production of a Z boson and b quarks with the 2012 collision data recorded by the CMS experiment at 8 TeV in proton-proton collisions at LHC. The importance of this physics process comes from the understanding of the perturbative Quantum Chromodynamics calculation schemes of the b quark content inside the proton and how this quark is extracted in the collision. Thus, the Z+b physics can be used for many relevant Standard Model measurements, such as the Z+b polarization asymmetry and the Higgs boson to b quarks backgro
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5

Totaro, Pierluigi. "Search for a standard model Higgs boson in the tau-tau decay channel produced in proton-antiproton collisions at the center of mass energy of 1.96 TeV at Tevatron." Doctoral thesis, Università degli studi di Trieste, 2011. http://hdl.handle.net/10077/4487.

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2009/2010<br>In questa tesi viene descritta la ricerca del bosone di Higgs del Modello Standard nel canale di decadimento in coppie di leptoni τ , condotta al Tevatron in collisioni protonantiprotone ad un’energia nel centro di massa √s = 1.96 TeV. L’analisi si basa su circa 2.3 fb−1 di dati raccolti dall’esperimento Collider Detector at Fermilab (CDF) ed e' stata effettuata considerando i seguenti processi di produzione di segnale: WH(→ τ τ ), ZH(→ τ τ ), qHq’→qτ τq’ e gg→H→ τ τ . Gli eventi sono selezionati richiedendo un τ adronico ed un elettrone (o muone) isolato, quest’ultimo prov
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6

Panizzo, Giancarlo. "Testing new physics with bottom quarks at LHC: a pragmatic approach." Doctoral thesis, Università degli studi di Trieste, 2015. http://hdl.handle.net/10077/10891.

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2013/2014<br>This work discusses how Bottom-quark physics at the Large Hadron Collider (LHC) can be used as a probe to hint to Beyond the Standard Model Physics from a phenomenological point of view. In this contest, the calculation of three observables is presented, all related to the production of one boson (Z, or a Higgs particle of Beyond the Standard Model nature) in association with a bottom-quark. The Polarization Asymmetry of the Z-boson produced in association with a b-quark is computed at Leading Order, using the 5-flavours number scheme, assuming it is measured at the LHC with
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7

Contini, Emanuele. "Galaxy populations in clusters and proto-clusters." Doctoral thesis, Università degli studi di Trieste, 2014. http://hdl.handle.net/10077/9964.

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2012/2013<br>The aim of my Thesis is to explore the physical properties of the galaxy population in clusters and proto-clusters. A large number of physical processes plays an important role in the formation and evolution of galaxies: cooling, that allows the condensation of gas in the centre of dark matter haloes; star formation, that converts cold gas in stars; feedback from Active Galactic Nuclei (AGN), that prevents the gas in the central regions of haloes from "over-cooling"; feedback from Supernovae, which liberates energy in the surrounding, mixing the gas and enriching it with hea
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8

Schizzi, Andrea. "Associated production of W bosons and two jets from b quarksat the CMS experiment." Doctoral thesis, Università degli studi di Trieste, 2015. http://hdl.handle.net/10077/10892.

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2013/2014<br>Il Modello Standard delle particelle elementari è senza dubbio una delle teorie che hanno riscosso il maggior quantitativo di successo nella storia della fisica. La recente scoperta del bosone di Higgs, ad opera degli esperimenti ATLAS e CMS operanti presso il Large Hadron Collider (LHC) di Ginevra, è solamente l’ultima di una lunga serie di predizioni teoriche confermate dall’esperimento. Il meccanismo di produzione di quark b in associazione a bosoni vettori W e Z si inquadra all’interno della fenomenologia del Modello Standard, ma la sua predizione teorica presenta alcune inte
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La, Licata Chiara. "Measurement of the production cross section of a Z boson in association with exactly one or at least two b jets with the CMS experiment at LHC." Doctoral thesis, Università degli studi di Trieste, 2015. http://hdl.handle.net/10077/10890.

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2013/2014<br>Il Modello Standard fornisce una delle piu’ soddisfacenti descrizioni delle proprieta’ delle particelle elementari e delle loro interazioni dato il notevole accordo esistente tra le sue predizioni ed i risultati sperimentali conseguiti negli ultimi decenni. Le predizioni teoriche di questo modello sono state verificate in maniera sempre piu’ accurata da numerosi esperimenti ma ci sono ancora alcuni aspetti che non trovano un’ adeguata spiegazione all’interno di questa teoria. Gli esperimenti a LHC si propongono, quindi, di fornire una risposta alle domande rimaste ancora aperte e
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10

Sammito, Davide. "Integration of plasmonic gratings into optoelectronic devices." Doctoral thesis, Università degli studi di Trieste, 2013. http://hdl.handle.net/10077/8578.

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2011/2012<br>ABSTRACT This thesis deals with the control of light absorption in semiconductor devices by the plasmonic resonances of periodically arranged metallic nanostructures integrated on them. Metallic gratings support propagating (SPP) and localized (LSP) plasmonic excitations and surface plasmons-related phenomena, like Extraordinary Optical Transmission (EOT) and plasmonic band gaps, as well as conventional diffraction effects. We combine all the optical resonances outlined to tune the incoupling and distribution of incident photons in the absorbing semiconductor substrate. In partic
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11

Munari, Emiliano. "The mass distribution in galaxy clusters from their internal dynamics." Doctoral thesis, Università degli studi di Trieste, 2014. http://hdl.handle.net/10077/9967.

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2012/2013<br>We analyse the relation between the masses of cluster- and group-sized halos, extracted from $\Lambda$CDM cosmological N-body and hydrodynamic simulations, and their velocity dispersions, at different redshifts from $z=2$ to $z=0$. The main aim of this analysis is to understand how the implementation of baryonic physics in simulations affects such relation, i.e. to what extent the use of the velocity dispersion as a proxy for cluster mass determination is hampered by the imperfect knowledge of the baryonic physics. In our analysis we use several sets of simulations with di
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12

Lea, Ramona. "Produzione di ipernuclei leggeri in collisioni Pb-Pb con l'esperimento ALICE a LHC." Doctoral thesis, Università degli studi di Trieste, 2013. http://hdl.handle.net/10077/8582.

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2011/2012<br>The subject of the present PhD thesis is the study of the production of light hypernuclei in ultra-relativistic Pb-Pb collisions with ALICE (A Large Ion Collider Experiment), one of the four major experiments at the LHC (Large Hadron Collider). The main physics goal of the ALICE experiment is the investigation of the properties of the strongly interacting matter at high energy density ($>$ 10 GeV/fm$^3$) and high temperature ($\approx$ 0.2 GeV) conditions. According to the lattice Quantum Chromo Dynamics (QCD) calculations, under these conditions (i.e. high temperature and larg
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13

Moretti, Elena. "Upper Limits on High Energy emissions from GRB." Doctoral thesis, Università degli studi di Trieste, 2010. http://hdl.handle.net/10077/3721.

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2008/2009<br>The intense and unpredictable flashes of gamma rays in the energy band (10 keV – 1 MeV), called Gamma-Ray Bursts (GRB), were discovered in the late 60's. Since then several experiments were dedicated to detect and understand these phenomena. Up to now, we do not have yet a complete explanation for the GRB progenitors and their emission mechanism. In the first phase, the so-called prompt phase, lasting from few ms to tens of seconds, these bursts emit mainly in the band from hard-X to soft gamma. In a longer second phase, called afterglow, the GRB emission ranges from the radi
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14

Pinamonti, Michele. "Measurement of the top-antitop production cross-section with the ATLAS experiment at the LHC." Doctoral thesis, Università degli studi di Trieste, 2012. http://hdl.handle.net/10077/7397.

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2010/2011<br>In quark top, scoperto al collisionatore ppbar Teavtron nel 1995, è stato osservato in collisioni pp a LHC dagli esperimenti ATLAS e CMS nel 2010. L'analisi sviluppata dal candidato e presentata in questa tesi è stata oggetto della prima pubblicazione sulla fisica del quark top da parte della collaborazione ATLAS: la misura di sezione d'urto di produzione di coppie top-antitop (ttbar). L'analisi è stata aggiornata utilizzando la totalità dei dati di collisioni pp a 7 TeV raccolti tra agosto 2010 e agosto 2011. Nell'analisi vengono selezionati stati finali contenenti un elettrone
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15

Mohammadi, Sara. "Bio-medical X-ray imaging with Synchrotron Radiation: study and implementation of algorithms related to phase sensitive techniques." Doctoral thesis, Università degli studi di Trieste, 2013. http://hdl.handle.net/10077/8585.

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2011/2012<br>Phase-contrast X-ray imaging is an invaluable tool in medical diagnostics and biological sciences. It provides images where both absorption and refraction contribute. For quantitative analysis of these images, the phase needs to be retrieved numerically. There are many phase-retrieval methods available. My thesis aims to optimize the application of phase retrieval methods for different phase-contrast imaging situations. A quantitative comparison between phase contrast and phase retrieved images is also performed on some selected examples. We analyzed the two most-applied phas
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Sartoris, Barbara. "Cosmological constraints with clusters of galaxies." Doctoral thesis, Università degli studi di Trieste, 2012. http://hdl.handle.net/10077/7738.

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2010/2011<br>This Ph.D. Thesis is devoted to the derivation of cosmological constraints by using clusters of galaxies as probes. Clusters of galaxies provide potentially powerful means to measure the growth of cosmic structures, as well as excellent astrophysical laboratories. As such they have played an important role in establishing the current cosmological paradigm. On one hand, the results presented in this Thesis provide cosmological constraints from the best X-ray surveys of distant galaxy clusters available at present. On the other hand, the techniques developed to forecast constr
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17

Zannier, Valentina. "ZnSe nanowires by molecular beam epitaxy: growth mechanisms and properties." Doctoral thesis, Università degli studi di Trieste, 2015. http://hdl.handle.net/10077/11134.

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2013/2014<br>This thesis is devoted to the study of the growth of Zinc Selenide (ZnSe) nanowires (NWs) by Au-assisted molecular beam epitaxy (MBE). The growth process consists in many steps which were individually investigated by means of in-situ and ex-situ spectroscopic and microscopic techniques. First, the formation of nanoparticles upon annealing of a thin Au film deposited on different substrates was studied by X-ray photoemission spectroscopy, grazing incident X-ray diffraction and scanning electron microscopy. The nanoparticles were used as seeds for the 1-dimensional ZnSe crystal gro
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18

Costanzi, Alunno Cerbolini Matteo. "Neutrino constraints from clusters of galaxies and other probes." Doctoral thesis, Università degli studi di Trieste, 2015. http://hdl.handle.net/10077/10938.

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2013/2014<br>This Ph.D Thesis is devoted to the derivation of cosmological constraints by using different probes of the large scale structure, with focus on massive neutrino constraints from galaxy clusters surveys. After having introduced the general theory of cosmic structure formation and the probes used for this Thesis work, I present a study on the effects that an improved calibration of the halo mass function for cosmology with massive neutrinos has on theoretical predictions of cluster number counts and on cosmological parameter inference from cluster samples. These results are partic
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Rizzi, Michele. "Carbon dioxide adsorption and hydrogenation on nickel-based surfaces: a first principles study." Doctoral thesis, Università degli studi di Trieste, 2011. http://hdl.handle.net/10077/5976.

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2009/2010<br>The chemistry of carbon dioxide has recently become of great interest both for technological and environmental issues. Indeed, carbon dioxide is one of the most problematic greenhouse gases and is also a fundamental ingredient for the industrial catalytic organic synthesis of many compounds like, for example, methanol. Recent investigations have shown that, while the common industrial process for methanol synthesis is carried out on Cu catalysts, Ni-Cu model catalysts show a particularly high e ciency. In order to understand the origin of such increase in the catalyst activity,
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Venaruzzo, Massimo. "Study of the strange resonance sigma (1385) as a tool for the analysis of the dynamics of the Quark Gluon Plasma in the ALICE experiment at LHC." Doctoral thesis, Università degli studi di Trieste, 2011. http://hdl.handle.net/10077/4567.

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2009/2010<br>La presente tesi si basa sul lavoro da me e ettuato nell'ambito della collaborazione ALICE. L'obiettivo scientifi co principale dell'esperimento é quello di investigare le proprietà della materia fortemente interagente fino alle elevatissime densità di energia (> 10 GeV/fm^3) e temperatura (~ 0.2 GeV) che verranno fornite da LHC e che ci si aspetta caratterizzino il mezzo formato nelle collisioni tra ioni pesanti a questi regimi. Calcoli di Cromo Dinamica Quantistica (QCD) su reticolo prevedono che in tali condizioni, il confi namento dei quark in adroni privi di carica di color
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Zhan, Rongrong. "Structural investigation of complex surface interfaces by means of X-ray Photoelectron Diffraction." Doctoral thesis, Università degli studi di Trieste, 2012. http://hdl.handle.net/10077/7447.

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2010/2011<br>The goal of this dissertation is to explain how the X-ray photoelectron diffraction technique can be successfully employed in the structural investigation of complex surface interfaces of ultra-thin films. Local geometrical analysis, combined with other techniques that gain additional electronic and surface morphological information to the system investigated, shed light on those extremely complicated surface atomic systems. These studies are aimed to contribute to the many interesting applications in fields like nano-electronics, surface coating and magnetic storage devices.<br>
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Montanino, Damiana. "Study of the associated production of a Z boson and jets in pp collisions at sqrt(s) = 7 TeV at CMS." Doctoral thesis, Università degli studi di Trieste, 2013. http://hdl.handle.net/10077/8583.

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2011/2012<br>In this thesis differential cross sections measurements of Z boson and jets associated production (Z + jets) will be presented; they are obtained by analyzing a large part of the 2011 dataset that corresponds to a total integrated luminosity of 4.89 1/fb. This type of processes are central in the physics program of LHC. The study of jets produced with Z provides a stringent and important test of perturbative QCD. In addition, a precise measurement of the Z + jets cross sections is crucial since these processes are a significant background in searches for new physics. This work i
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Giangrisostomi, Erika. "Matter under Extreme Transient conditions investigated with Free Electron Laser radiation at FERMI." Doctoral thesis, Università degli studi di Trieste, 2015. http://hdl.handle.net/10077/10943.

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2013/2014<br>Subject to high-intensity ultra-short light pulses, solid materials are driven into short-living states of extremely high temperatures and pressures. Creating such unique states under controlled laboratory conditions and addressing their physical properties with an adequate time resolution to follow their fast-evolving dynamics has been a primary objective of pump-and-probe studies employing the high-peak-power femtosecond optical lasers that have become of increasingly widespread availability during the last three decades. Operative since few years, free electron lasers (FELs
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Borin, Daniele. "Micromechanical oscillators for biochemical applications." Doctoral thesis, Università degli studi di Trieste, 2015. http://hdl.handle.net/10077/11131.

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2013/2014<br>Gli oscillatori micro e nanomeccanici stanno trovando crescente applicazione come biosensori, grazie alla loro elevata sensibilità, alla possibilità di effettuare analisi con un ridotto volume di campione biologico e senza molecole di marcatura secondarie e alla loro integrabilità come sensori in dispositivi di analisi portatili a basso costo. Questo progetto ha come scopo l’utilizzo di oscillatori micromeccanici a geometria verticale (micropillars) come sensori biomolecolari, rispetto ai più comuni oscillatori orizzontali (cantilevers). La struttura dei micropillars, infatti, pe
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Tavagnacco, Daniele. "ANALYSIS AND CHARACTERIZATION OF SYSTEMATIC EFFECTS RELATED TO THE STUDY OF COSMIC MICROWAVE BACKGROUND ANISOTROPIES WITH THE PLANCK LFI INSTRUMENT." Doctoral thesis, Università degli studi di Trieste, 2015. http://hdl.handle.net/10077/10944.

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2013/2014<br>Il satellite Planck è il diretto successore europeo del satellite americano WMAP. Planck è lo strumento di terza generazione per lo studio del CMB dallo spazio ed è composto da una matrice di 74 ricevitori suddivisi in due strumenti, Low Frequency Instrument (LFI) e High Frequency Instrument (HFI), che osserva il cielo in nove frequenze nell'intervallo tra i 30 GHz ed 857 GHz. Tutti i ricevitori osservano il cielo contemporaneamente e continuamente con una risoluzione angolare che va dai ~30 arcominuti, alla frequenza più bassa, ai ~5 arcominuti, alla frequenza più alta, ed una se
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Marzolino, Ugo. "Entanglement and decoherence in many-body physics." Doctoral thesis, Università degli studi di Trieste, 2011. http://hdl.handle.net/10077/5827.

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2009/2010<br>The thesis deals with several features of quantum many-body systems. They are described both in terms of reversible unitary transformations and as an environment interacting with other systems. An introductory part introduces the main ideas of quantum noise and dissipative dynamics. A chapter is also dedicated to some useful aspects of entanglement. The second part of the thesis concerns the orginal results. A chapter describes the dynamics of two qubits interacting with a common environment. This chapter is focused on the derivation of a new Markovian approximation, finer than
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Pesaro, Giulia. "Measurement at COMPASS of transverse spin effects on identified hadrons on a transversely polarised proton target." Doctoral thesis, Università degli studi di Trieste, 2011. http://hdl.handle.net/10077/4566.

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2009/2010<br>La sezione d'urto che descrive la diff usione profondamente inelastica di un leptone carico (mu+) su di un nucleone (protone) polarizzato trasversalmente rispetto alla direzione del moto con identifi cazione di almeno un adrone nello stato finale presenta otto modulazioni azimutali, rispetto al piano de finito dallo spin del nucleone bersaglio e dal momento del leptone incidente. Tra queste le meglio conosciute sono dovute all'eff etto Collins e all'eff etto Sivers. Il primo eff etto è la frammentazione di un quark polarizzato trasversalmente in un adrone e l'ampiezza della
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Donadi, Sandro. "Electromagnetic Radiation Emission and Flavour Oscillations in Collapse Models." Doctoral thesis, Università degli studi di Trieste, 2014. http://hdl.handle.net/10077/9961.

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2012/2013<br>In order to solve the measurement problem, collapse models modify the Schroedinger dynamics by adding non linear and stochastic terms. Collapse models provide different predictions compare to Quantum mechanics. In this thesis we focus on two phenomena where the predictions of quantum mechanics and collapse models are different: the electromagnetic radiation emission from charged systems and the flavour oscillations. We analysed both of them and obtained the quantitative deviations from standard quantum behaviour.<br>Al fine di risolvere il problema della misura, i modelli di co
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Cumani, Paolo. "Analysis and estimation of the scientific performance of the GAMMA-400 experiment." Doctoral thesis, Università degli studi di Trieste, 2015. http://hdl.handle.net/10077/10888.

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2013/2014<br>Per uno studio completo che parte dalla materia oscura e va all'origine e propagazione dei raggi cosmici, quello multi canale è uno degli approcci migliori per risolvere i quesiti irrisolti della fisica delle astroparticelle. GAMMA-400, grazie alla sua natura duale, dedita allo studio di raggi cosmici (elettroni fino alle energie del TeV e protoni e nuclei fino a 10^{15}-10^{16} eV) e raggi gamma (da 50 MeV fino a qualche TeV), si dedicherà allo studio di questi problemi. Lo scopo di questa tesi è lo studio delle prestazioni di GAMMA-400 per l'osservazione dei raggi gamma. Due di
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Valdemarca, Gioia. "Ai margini del centro. Osservazioni sull'idea di indeterminatezza ne La coscienza di Zeno di Italo Svevo e l'uomo senza qualità di Robert Musil." Doctoral thesis, Università degli studi di Trieste, 2010. http://hdl.handle.net/10077/3526.

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2008/2009<br>Tutto inizia nel caos, e tutto termina nel caos: Robert Musil e Italo Svevo lo dimostrano nei loro romanzi principali, "L'uomo senza qualità" e "La coscienza di Zeno". Entrambi gli autori sono specchi di di un'epoca, l'inizio del Novecento, in cui il senso di sicurezza ha ceduto il posto all'indeterminatezza e all'incertezza (come ad esempio nella fisica, nella biologia e nella psicologia) a causa della caduta dell'impostazione deterministica nella scienza. A partire da questa crisi epocale, che ha cambiato radicalmente ogni visione del mondo, Svevo e Musil hanno dato vita a due p
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Mitri, Elisa. "Fabrication of microfluidic devices for studying living cells responding to external stimuli by FTIR vibrational spectroscopy." Doctoral thesis, Università degli studi di Trieste, 2014. http://hdl.handle.net/10077/9971.

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2012/2013<br>The present PhD Thesis is about the development of new fabricative strategies to obtain microfluidic devices suitable for InfraRed MicroSpectroscopy (IRMS) studies on living cells in physiological environment and the demonstration of the screening and diagnostic capabilities of this technique for bio-medical applications. IRMS detects the vibrational pattern of molecules allowing the label-free characterization of the chemical profile of a biological specimen and its correlation with the sample morphology. Although powerful and versatile, this technique has been limited until re
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Radivo, Andrea. "Experimental study of the physics of nanostructured organic photovoltaic devices." Doctoral thesis, Università degli studi di Trieste, 2014. http://hdl.handle.net/10077/9973.

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2012/2013<br>Organic photovoltaic (OPV) cells based on Bulk Heterojunction (BHJ) architecture, have reached a record efficiency of 8.3% approaching the value of 10% which is considered the threshold for commercial exploitation of this technology. However, BHJ OPV cells suffer from charge collection issues, which hinder significant further increase of efficiency. A few theoretical studies have given clear indications that the most efficient nanoscale architecture consists of nano interdigitated structure of donor (D) and acceptor (A), the materials
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Tavagnacco, Letizia. "How do water molecules probe and control bionanostructures and food functionalities." Doctoral thesis, Università degli studi di Trieste, 2014. http://hdl.handle.net/10077/9978.

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2012/2013<br>L’acqua è universalmente presente nei sistemi biologici. Le sue peculiari proprietà hanno una forte influenza sulla struttura e sul comportamento chimico di macromolecole biologiche ed alimentari. La dissoluzione di una molecola di soluto in acqua comporta l’interazione dei sui gruppi funzionali con la circostante struttura della fase condensata dell’acqua. La maggior parte delle molecole biologicamente importanti hanno una complessa architettura che mantiene assieme funzionalità polari e componenti idrofobiche. Le interazioni di queste funzionalità con le circostanti molecole d’a
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Corvaglia, Stefania. "Nanoscale platform to study unstructured proteins interactions." Doctoral thesis, Università degli studi di Trieste, 2014. http://hdl.handle.net/10077/9975.

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2012/2013<br>Le proteine intrinsecamente disordinate (IDP), nello stato nativo non ripiegate, sono inclini all’aggregazione e direttamente correlate con lo sviluppo di malattie amiloidi. Tra queste, ci siamo focalizzati sullo studio dell’alfa-Sinucleina (AS), una proteina coinvolta nella malattia di Parkinson, un disturbo neurodegenerativo caratterizzato dalla degenerazione dei neuroni dopaminergici e l’accumulo di AS in placche amiloidi. Sebbene lo studio delle interazioni AS-dopamina sia di importanza cruciale nella comprensione dei meccanismi responsabili dello sviluppo della malattia, tutt
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Romeo, Michele. "Development and applications of DFT methodologies for the simulation of core spectra of molecules adsorbed on surfaces." Doctoral thesis, Università degli studi di Trieste, 2015. http://hdl.handle.net/10077/10902.

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2013/2014<br>Questo documento riporta risultati di calcoli DFT di rilassamenti periodici e di spettri NEXAFS di core su soglia K per taluni sistemi di stato solido attraverso l’utilizzo di una metodologia computazionale ibrida. Appropriati modelli di cluster di tali rilassamenti vengono presi in considerazione per il calcolo degli spettri NEXAFS a livello finito in uno schema di approccio a orbitali molecolari. Il problema a cui ci si indirizza nella fattispecie riguarda la spettroscopia di molecole adsorbite su superfici. La prima parte del lavoro si focalizza sul calcolo di spettri NEXAFS K-
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Coslovich, Giacomo. "Disclosing the ultrafast dynamics of competing phases in high - temperature superconductors by time - resolved optical spectroscopy." Doctoral thesis, Università degli studi di Trieste, 2011. http://hdl.handle.net/10077/4511.

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2009/2010<br>Understanding the interplay between the phases present in a high-temperature superconductor (superconducting, pseudogap, strange metal and Fermi-liquid-like) is the key-concept for shining light on the nature of the superconductivity mechanisms in copper-oxide based superconductors. Here, I set the bases for addressing this physics by developing an approach based on ultrafast time-resolved optical spectroscopy in the infrared and visible spectral regions. The experiments performed disclose the real-time evolution of the optical properties while the system is suddenly brought out
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Olivieri, Giorgia. "Organic Electronic Devices: Investigation of the Electronic Transport Properties at the Molecular Level." Doctoral thesis, Università degli studi di Trieste, 2013. http://hdl.handle.net/10077/8589.

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2011/2012<br>I dispositivi elettronici basati sui semiconduttori organici sono attualmente oggetto di intensi studi dopo che la loro introduzione ha aperto la strada a un tipo di elettronica altamente versatile e a basso costo. Tuttavia è ancora necessaria una buona comprensione delle proprietà strutturali ed elettroniche dei semiconduttori organici per superare la generale bassa efficienza che i dispositivi organici presentano rispetto a quelli inorganici. I principali sforzi in questo campo della ricerca possono essere raggruppati in due categorie. Da un lato le proprietà elettriche dei sem
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Dalmiglio, Matteo Maria. "Oxidation of supported PtRh partcles:size and morphology effects." Doctoral thesis, Università degli studi di Trieste, 2010. http://hdl.handle.net/10077/3442.

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2008/2009<br>The chemical transformations of supported PtRh particles ranging in size from a few micrometers to a few nanometres, and nanocrystalline films have been studied under identical oxidizing conditions by means of different chemical and structural characterization techniques; in particular the main technique used has been the scanning photoemission spectromicroscopy (SPEM) available at the EscaMicroscopy beamline of the Elettra Synchrotron Light Source. This novel experimental technique allows sample’s chemical mapping with a spatial resolution of 100nm and the acquisition of photoemi
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39

Ganau, Mario. "Nanotechnology Applications in Quantitative Neuroscience: Proteomic Analysis of Malignant Gliomas." Doctoral thesis, Università degli studi di Trieste, 2013. http://hdl.handle.net/10077/8575.

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2011/2012<br>Abstract (English) The current limit of knowledge advancement in proteomic analysis of gliomas, the most common primary malignant brain tumors, is related to the high sensitivity required to detect specific biomarkers within few cells volumes. To address this problem we developed a quantitative approach to eventually enable precise, high throughput and low cost analysis of glial cells with potential capability of real-time pathological screening and subtyping of brain tumors. A device consisting in micro-fabricated wells capable to isolate and host living astrocytes was desig
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Ponzi, Aurora. "Theoretical study of molecular photoionization: diffraction and correlation effects." Doctoral thesis, Università degli studi di Trieste, 2015. http://hdl.handle.net/10077/11112.

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2013/2014<br>Questa tesi raccoglie i risultati dell’attività di ricerca del mio dottorato che ha riguardato lo studio di molecole sottoposte a fotoionizzazione e il calcolo delle grandezze dinamiche coinvolte in questo tipo di processo. Una prima linea di ricerca ha seguito la descrizione degli effetti di interferenza e diffrazione nei profili di fotoionizzazione ad alte energie, attraverso un approccio basato sul metodo Density Functional Theory (DFT) accoppiato all’uso di una base di B-spline. Le oscillazioni derivanti da questi effetti di interferenza e diffrazione rappresentano un f
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Belloni, Francesca. "Neutron induced fission cross section measurements aimed at nuclear technology development." Doctoral thesis, Università degli studi di Trieste, 2010. http://hdl.handle.net/10077/3720.

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2008/2009<br>Neutron induced fission cross sections of 233U, 238U, 241Am, 243Am and 245Cm in the energy range between 500 keV and 20 MeV obtained at the n_TOF Neutron Time of Flight facility at CERN (Geneve) are presented. Fission fragments had been detected by a gas counter with good discrimination between nuclear fission products and background events. A comparison between the extracted cross sections, previous experimental results and evaluated libraries is reported.<br>In questa tesi sono presentate le sezoni d'urto indotte da neutroni di energia compresa tra 500 KeV e 20 MeV su 233U,
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42

Golfetto, Enrico. "Electronic structure and chemical reactivity of transition metals' pseudomorphic layers and supported nanoclusters." Doctoral thesis, Università degli studi di Trieste, 2010. http://hdl.handle.net/10077/3580.

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2008/2009<br>The importance of heterogeneous catalysis in chemical industry and its economic impact in today‟s society motivate the continuous research effort in this field. Transition metals are among the main ingredients of commercial catalysts due to their chemical properties which depend on their surface morphological and electronic structure. It is well known that their catalytic properties can be further improved by tuning particle size in the nanometre range or by alloying different transition metals. Nowadays it is possible to predict the variation of surface chemical properties on th
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Dorigo, Mirco. "Search for New Physics in the Bs -> J/psi phi and Bs -> phi phi decays at CDF." Doctoral thesis, Università degli studi di Trieste, 2013. http://hdl.handle.net/10077/8586.

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2011/2012<br>We present a search for physics beyond the standard model (SM) through a measurement of the violation of the charge-parity (CP) symmetry in two decays of the Bs meson using data collected by the Collider Detector at Fermilab (CDF) in proton-antiproton collisions at the center-of-mass energy of 1.96 Tev. We exploit the decays Bs->Jpsi (->mu mu) phi(-> KK) and Bs -> phi(-> KK) phi(-> KK), for which the SM accurately predicts very small or vanishing CP violation; both decay modes are very sensitive to new sources of CP violation expected in a broad class of SM extensions. We ana
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Capogrosso, Valentina. "Dimensionality and ordering effects on the electronic structure of low dimensional strongly correlated electron transition metal oxides." Doctoral thesis, Università degli studi di Trieste, 2013. http://hdl.handle.net/10077/8587.

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2011/2012<br>Nel vasto scenario dei materiali fortemente correlati gli ossidi dei metalli di transizione hanno attratto enorme interesse a causa delle loro interessanti proprietà fisiche, come ad esempio, la superconduttività nei cuprati e la magnetoresistenza gigante nelle manganiti. In particolare, il mio interesse è stato rivolto ad una specifica classe di materiali, per i quali la dimensionalità è il parametro più importante. Le attività sperimentali sono state focalizzate verso due sistemi: la manganite Pr0.5Ca1.5MnO4 dopata a metà e a strato singolo (hd-PCMO) e la famiglia dei rutenati
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Santarelli, Xenja. "Development of capabilities for "in situ" analysis of nanoparticles at the MCX powder diffraction beamline." Doctoral thesis, Università degli studi di Trieste, 2011. http://hdl.handle.net/10077/4479.

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2009/2010<br>Riassunto Presso la linea di diffrazione MCX (Material Characterization by X-ray diffraction) del Sincrotrone di Trieste e' stata messa a punto una stazione sperimentale che consente di eseguire analisi "in situ" di nanostrutture. Il sistema e' indipendente dal diffrattometro e consente di ottenere in tempi ridotti (grazie all’uso di un Imaging Plate come detector) pattern di diffrazione da polveri o film sottili. La stazione sperimentale e’ dotata di un forno che puo’ riscaldare i campioni fino a 1000ºC. Inoltre e' stato implementato un sistema che consente il flusso di gas at
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46

Birarda, Giovanni. "Development of microfluidic devices for biomedical applications of synchrotron radiation infrared microspectroscopy." Doctoral thesis, Università degli studi di Trieste, 2011. http://hdl.handle.net/10077/4475.

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2009/2010<br>ABSTRACT DEVELOPMENT OF MICROFLUIDIC DEVICES FOR BIOMEDICAL APPLICATIONS OF SYNCHROTRON RADIATION INFRARED MICROSPECTROSCOPY by Birarda Giovanni The detection and measurement of biological processes in a complex living system is a discipline at the edge of Physics, Biology, and Engineering, with major scientific challenges, new technological applications and a great potential impact on dissection of phenomena occurring at tissue, cell, and sub cellular level. The present PhD Thesis dealt with the development of methodologies and technologies to transform InfraRed Micro
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D'este, Elisa. "Bio-sample environment manipulation using advanced microscopy techniques." Doctoral thesis, Università degli studi di Trieste, 2012. http://hdl.handle.net/10077/7361.

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2010/2011<br>Under physiological conditions in the brain, molecules are released with high spatial and temporal resolution. A lot of efforts have been done in the last years in order to develop techniques that mimic this situation. Among them, we mention the use of micropipettes for the ejection of fluids, the use of AFM (Atomic Force Microscopy), microfluidic devices and optical manipulation. The latter approach exploits light to manipulate the samples, e.g. to create transient pores in the cell membrane or to move small objects carrying a stimulus. This Thesis concerns with the development
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Migliorini, Elisa. "Nanostructured substrates to control the Embryonic Stem cells differentiation into neuronal lineage." Doctoral thesis, Università degli studi di Trieste, 2012. http://hdl.handle.net/10077/7367.

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2010/2011<br>The objective of this project was to develop new nanotechnology-based strategies to increase embryonic stem cells (ESCs) differentiation into neuronal lineage. In particular it was chosen to investigate a nanostructured physical support for in vitro stem cell culture in which both the nanometrical topography and mechanical properties are well controlled and characterized. Nanopatterned substrates were designed to have physical properties as close as possible to the in vivo microenvironment where stem cells normally grow and differentiate based on the assumption that mimicking th
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Vattakunnel, Shaji. "The cosmic star formation rate: observational measurements and modelization." Doctoral thesis, Università degli studi di Trieste, 2013. http://hdl.handle.net/10077/8584.

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2011/2012<br>La mia Tesi di Dottorato si occupa dello studio della formazione stellare cosmica e delle galassie con formazione stellare (SFG), sia dal punto di vista osservativo che teorico. La formazione stellare è uno degli elementi chiave per comprendere la composizione e l'evoluzione delle galassie. Per identificare le galassie con formazione stellare è cruciale sfruttare informazioni multispettrali per ottenere una stima migliore del tasso di formazione stellare. La formazione stellare istantanea in una data galassia può essere stimata attraverso la misura di un indicatore coll
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Grieco, Valentina Luciana. "Gamma Ray Bursts, Supernovae and identification of the hosts by means of chemical evolution models." Doctoral thesis, Università degli studi di Trieste, 2014. http://hdl.handle.net/10077/9966.

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2012/2013<br>Questa tesi è divisa in tre sezioni: nella prima parte viene studiata la connessione tra Gamma Ray Bursts (GRB) e supernovae (SN) e il confronto tra il tasso cosmico di esplosione di SNIb/c e GRB; per tasso cosmico si intende il numero di eventi che avviene nell'unità di tempo in un volume unitario comovente di Universo. Nella seconda parte, ci concentriamo sull'evoluzione chimica di galassie di diverso tipo morfologico. In questa parte, come modello di prova utile per analizzare sistemi sferoidali, viene sviluppato un modello per il Bulge della nostra Galassia. Infine, nella ter
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