Items 13-32 di 32
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Gravitational lensing by massive and Exotic objects
(Universita degli studi di Salerno, 2023-02-21)Space-time is curved by the presence of massive bodies and this curvature influences the motion of the bodies themselves: this leads to a geometry in constant evolution. One of the consequences is that even light, supposed ... -
Hidden Structures and Conflicting Items in Combinatorial Optimization Problems
(Universita degli studi di Salerno, 2023-02-14)Combinatorial optimization-based methods are widely used to solve complex real life problems. In this thesis, we use some of these methods for addressing several emerging combinatorial opti- mization problems on graphs ... -
Local and global properties of Jacobi related geometries
(Universita degli studi di Salerno, 2019-12-18)In this thesis local and global properties of Jacobi and related geometries are discussed, which means for us that so-called Dirac-Jacobi bundles are considered. The whole work is roughly divided in three parts, which ... -
Low and high field Magnetic Resonance Imaging and its application in food science and plants
(Universita degli studi di Salerno, 2018-11-20)Nuclear Magnetic Resonance (NMR) and Magnetic Resonance Imaging (MRI) are techniques that have seen a remarkable success and a fast growth over the past decades. Thanks to its non-invasivity and non-descrutivity, the MRI ... -
Low-frequency noise spectroscopy as an effective tool for electric transport analysis
(Universita degli studi di Salerno, 2018-07-09)In this work, several experiments and analyses performed by means of noise spectroscopy, on a broad typology of materials and compounds, are presented. Structural, DC electrical transport and noise properties are exposed ... -
Methodologies for environmental risks assessment related to the exploitation of energy geo-resources
(Universita degli studi di Salerno, 2021-10-05)The increasing exploitation of geo-energy resources to satisfy the needs of the world's population has also led to a focus on the risks associated with this type of human activity. It is in this context that this thesis ... -
MV-algebras, semirings and their applications
(Universita degli studi di Salerno, 2021-04-17)The thesis is divided in two parts: the first part regards MV-semirings, involutive semirings and semimodules over them with particular attention to injective and projective semimodules; the second part of the thesis is ... -
New features exhibited by transition metal pnictides
(Universita degli studi di Salerno, 2020-02-05)Superconductivity under pressure was recently discovered in two transition metal pnictides belonging to the Pnma space group, namely CrAs [1, 2] and MnP [3], in the vicinity of a magnetic phase, respectively at the ... -
Noncoercive nonlinear elliptic equations in unbounded domains
(Universita degli studi di Salerno, 2020-01-02)This research thesis is mainly devoted to the study of noncoercive Dirich let problems with discontinuous coefficients in unbounded domains. The presence of the noncoercive operator does not allow us to use classical the ... -
Numerical Modeling of Stochastic Differential Problems with Applications
(Universita degli studi di Salerno, 2023-01-27)The interest in the study of stochastic differential equations has grown considerably in recent years. The main reason for this interest is that stochastic differential equations are a potential tool for modeling ... -
On Vector-Valued Schrodinger Operators in Lp-spaces
(Universita degli studi di Salerno, 2018-04-06)... We construct a realization Ap of A in the spaces Lp(Rd;Cm), 1 p < 1, that generates a contractive strongly continuous semigroup. First, by using form methods, we obtain generation of holomorphic semigroups when the ... -
Orbital motion, periastron advance and galaxy rotation curves beyond General Relativity
(Universita degli studi di Salerno, 2023-01-02)The Extended Theories of Gravity (ETG) have become one of the most investigated the- oretical proposals among the alternative explanations for the observed flatness of galaxy rotation curves, related to the dark matter ... -
Polyhedral analysis and branch and cut algorithms for some NP-hard spanning subgraph problems
(Universita degli studi di Salerno, 2020-01-07)There is a widespread need to use a quantitative approach for the solution of decision problems that arise in many different areas of real life. The goal is to choose which decisions to take to manage a real system as ... -
Praseodymium and manganese doped Ca2RuO4: crystals growth and physical properties
(Universita degli studi di Salerno, 2023-07-17)Layered ruthenates have received a great attention in condensed matter physics due to the richness of their physical properties and the related phase diagram. Ruthenate compounds show a strong interplay between electronic, ... -
Lo pseudotensore energia-impulso in teorie estese della gravitazione
(Universita degli studi di Salerno, 2018-07-12)The gravitational field’s energy and momentum definitions are treated in extensive gravitation theories, through the generalization of the energymomentum pseudotensor, defined by Einstein in general relativity. This ... -
Stochastic processes governed by the generalized telegraph process and by Brownian motion and their applications
(Universita degli studi di Salerno, 2021-06-18)The aim of this research thesis is to broaden the treatment of stochastic processes derived from the telegraph process and Brownian motion. First, the classical telegraph process is presented. The Kolmogorov equations ... -
Tailoring the structural and surface properties of TiO2 thin films and TiO2-based nanolayers, with heat treatments, layer thickness, and oxide mixtures
(Universita degli studi di Salerno, 2021-12-15)Titanium dioxide (TiO2), also known as titanium (IV) oxide or titania, is naturally available on the Earth as a bright, fine, and white pigment. Thanks to its unique properties, such as high refractive index, chemical ... -
Transition Metal Dichalcogenides and Carbon Nanomaterials in Field Effect Devices and Photodetectors
(Universita degli studi di Salerno, 2023-02-20)This PhD thesis focuses on the electronic and optoelectronic characterization of devices based on low-dimensional materials and on a first approach to fabrication of 2D transition metal dichalcogenide (TMD) field effect ... -
Unveiling spin-orbit coupling e ects on the electronic states of multi-orbital Transition Metal Oxides
(Universita degli studi di Salerno, 2018-06-03)Transition Metal Oxides (TMOs) show a wealth of intriguing properties which are governed by the interplay of charge, spin, and orbital degrees of freedom. Moreover, the comprehension of the features of strongly ... -
Λ + c production vs the event charged-particle multiplicity in pp collisions at 13 TeV with ALICE at the LHC
(Universita degli studi di Salerno, 2023-03-22)The Quantum Chromo-Dynamics (QCD) theory predicts, in condition of very high temperature and/or energy density, a phase transition from the ordinary nuclear matter to a colour-deconfined medium called Quark–Gluon Plasma ...
