Results for "Claudia Cicone"

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Multivariate Fast Iterative Filtering for the decomposition of nonstationary signalsFeb 13 2019Recently several algorithms based on Empirical Mode Decomposition (EMD) have been proposed to decompose two or higher dimensional nonstationary signals which are varying over time, like the Bivariate, Multivariate EMD and Noise-Assisted Multivariate EMD. ... More
Iterative Filtering as a direct method for the decomposition of non-stationary signalsNov 08 2018The Iterative Filtering method is a technique developed recently for the decomposition and analysis of non-stationary and non-linear signals. In this work we propose two alternative formulations of the original algorithm which allows to transform the ... More
Outflows and complex stellar kinematics in SDSS star forming galaxiesJan 18 2016We investigate the properties of star formation-driven outflows by using a large spectroscopic sample of ~160,000 local "normal" star forming galaxies, drawn from the SDSS, spanning a wide range of star formation rates and stellar masses. The galaxy sample ... More
ALMA [CI]$^{3}P_{1}-^{3}P_{0}$ observations of NGC6240: a puzzling molecular outflow, and the role of outflows in the global $α_{\rm CO}$ factor of (U)LIRGsJul 16 2018We present ALMA and ACA [CI]$^{3}P_{1}-^{3}P_{0}$ ([CI](1-0)) observations of NGC6240, which we combine with ALMA CO(2-1) and IRAM PdBI CO(1-0) data to study the physical properties of the massive molecular (H$_2$) outflow. We discover that the receding ... More
The Atacama Large Aperture Submillimeter Telescope (AtLAST)Jul 10 2019The sub-mm sky is a unique window for probing the architecture of the Universe and structures within it. From the discovery of dusty sub-mm galaxies, to the ringed nature of protostellar disks, our understanding of the formation, destruction, and evolution ... More
Study of boundary conditions in the Iterative Filtering method for the decomposition of nonstationary signalsNov 19 2018Feb 13 2019Nonstationary and nonlinear signals are ubiquitous in real life. Their decomposition and analysis is an important topic of research in signal processing. Recently a new technique, called Iterative Filtering, has been developed with the goal of decomposing ... More
Linear dynamical systems on graphsJul 01 2016We consider linear dynamical systems with a structure of a multigraph. The vertices are associated to linear spaces and the edges correspond to linear maps between those spaces. We analyse the asymptotic growth of trajectories (associated to paths along ... More
Quasar outflows at $z \geq 6$: the impact on the host galaxiesJul 10 2017We investigate quasar outflows at $z \geq 6$ by performing zoom-in cosmological hydrodynamical simulations. By employing the SPH code GADGET-3, we zoom in the $2 R_{200}$ region around a $2 \times 10^{12} M_{\odot}$ halo at $z = 6$, inside a $(500 ~ {\rm ... More
ALMA Observations Show Major Mergers Among the Host Galaxies of Fast-growing, High-redshift Supermassive Black HolesNov 30 2016Feb 06 2017We present new ALMA band-7 data for a sample of six luminous quasars at z~4.8, powered by fast-growing supermassive black holes (SMBHs) with rather uniform properties: the typical accretion rates and black hole masses are L/L_Edd~0.7 and M_BH~10^9 M_sol. ... More
Fast-growing SMBHs in Fast-growing Galaxies, at High Redshifts: the Role of Major Mergers as Revealed by ALMAJan 04 2018We present a long-term, multi-wavelength project to understand the epoch of fastest growth of the most massive black holes by using a sample of 40 luminous quasars at z~4.8. These quasars have rather uniform properties, with typical accretion rates and ... More
ALMA Observations Show Major Mergers Among the Host Galaxies of Fast-growing, High-redshift Supermassive Black HolesNov 30 2016We present new ALMA band-7 data for a sample of six luminous quasars at z~4.8, powered by fast-growing supermassive black holes (SMBHs) with rather uniform properties: the typical accretion rates and black hole masses are L/L_Edd~0.7 and M_BH~10^9 M_sol. ... More
ALMA Observations Show Major Mergers Among the Host Galaxies of Fast-growing, High-redshift Supermassive Black HolesNov 30 2016Dec 04 2016We present new ALMA band-7 data for a sample of six luminous quasars at z~4.8, powered by fast-growing supermassive black holes (SMBHs) with rather uniform properties: the typical accretion rates and black hole masses are L/L_Edd~0.7 and M_BH~10^9 M_sol. ... More
The largely unconstrained multiphase nature of outflows in AGN host galaxiesFeb 28 2018Observations and simulations show that outflows in active galactic nuclei (AGN) contain gas in different phases. To understand their true impact on galaxy evolution, we advocate consistent and unbiased investigation of these multiphase winds in large ... More
A note on the Joint Spectral RadiusFeb 05 2015A brief summary on the properties of the so called Joint Spectral Radius
A near-infrared study of the multi-phase outflow in the type-2 quasar J1509+0434May 15 2019Based on new near-infrared spectroscopic data from the instrument EMIR on the 10.4 m Gran Telescopio Canarias (GTC) we report the presence of an ionized and warm molecular outflow in the luminous type-2 quasar J150904.22+043441.8 (z = 0.1118). The ionized ... More
Sonoluminescence as Quantum Vacuum Radiation, Reply to CommentsOct 21 1996Reply to Comments by Lambrecht, Jaekel, and Reynaud, and by Garcia and Levanyuk, submitted to Physical Review Letters.
Synthetic stellar mass-to-light ratios for stellar populationsAug 24 1998Evolutionary synthesis models for stellar populations of various ages and chemical compositions are constructed with the approach described in Maraston (1998), in which the Fuel Consumption Theorem is used to evaluate the energetics of Post Main Sequence ... More
Evolutionary synthesis of stellar populations: a modular toolJul 31 1998A new tool for the Evolutionary Synthesis of Stellar Populations (EPS) is presented, which is based on three independent matrices, giving respectively: 1) the fuel consumption during each evolutionary phase as a function of stellar mass; 2) the typical ... More
Cancelling Congruences of Lattices, While Keeping Their Filters and IdealsOct 27 2017Nov 09 2017In this paper, by using horizontal sums and without enforcing the Continuum Hypothesis, I am modifying an example from \cite{eucard} into a solution to the problem I have proposed in the same article: finding a lattice with the cardinalities of the sets ... More
Fully hadronic ttbar cross section measurement with ATLAS detectorNov 16 2011The top quark pair production cross section in the fully hadronic final state is characterized by a six jet topology, two of which could be identified as originating from a b-quark using ATLAS b-tagging algorithms. Compared to other decay channels, this ... More
A Note on Congruences of Infinite Bounded Involution LatticesSep 29 2018May 15 2019We prove that an infinite (bounded) involution lattice and even pseudo--Kleene algebra can have any number of congruences between $2$ and its number of elements or equalling its number of subsets, regardless of whether it has as many ideals as elements ... More
Fundamental solutions in the Colombeau framework: applications to solvability and regularity theoryJan 12 2007Jan 30 2007In this article we introduce the notion of fundamental solution in the Colombeau context as an element of the dual $\LL(\Gc(\R^n),\wt{\C})$. After having proved the existence of a fundamental solution for a large class of partial differential operators ... More
The rank invariant stability via interleavingsDec 10 2014A lower bound for the interleaving distance on persistence vector spaces is given in terms of rank invariants. This offers an alternative proof of the stability of rank invariants.
The Frobenius endomorphism and homological dimensionsJan 20 2003Feb 21 2003This is a survey on the relation between homological properties of the Frobenius endomorphism and finiteness of various homological dimensions of the ring or of modules over it, such as global dimension and projective dimension. We begin with Kunz's surprising ... More
Embedding ergodic actions of compact quantum groups on C*-algebras into quotient spacesApr 13 2006Sep 21 2013The notion of compact quantum subgroup is revisited and an alternative definition is given. Induced representations are considered and a Frobenius reciprocity theorem is obtained. A relationship between ergodic actions of compact quantum groups on C*-algebras ... More
Theory of quantum radiation observed as sonoluminescenceJun 15 1995Sonoluminescence is explained in terms of quantum radiation by moving interfaces between media of different polarizability. In a stationary dielectric the zero-point fluctuations of the electromagnetic field excite virtual two-photon states which become ... More
Topological structures in Colombeau algebras: investigation of the duals of $\Gc(\Om)$, $\G(\Om)$ and $\GS(\R^n)$Aug 20 2004Feb 13 2005We study the topological duals of the Colombeau algebras $\Gc(\Om)$, $\G(\Om)$ and $\GS(\R^n)$, discussing some continuous embeddings and the properties of generalized delta functionals.
Closed graph and open mapping theorems for topological $\wt{\C}$-modules and applicationsAug 03 2006Oct 17 2006We present closed graph and open mapping theorems for $\wt{\C}$-linear maps acting between suitable classes of topological and locally convex topological $\wt{\C}$-modules. This is done by adaptation of De Wilde's theory of webbed spaces and Adasch's ... More
Unitary Dual of p-adic U(5)Dec 09 2014We study the parabolically induced complex representations of the unitary group in 5 variables, $ U(5), $ defined over a p-adic field. Let $F$ be a p-adic field. Let $E : F$ be a field extension of degree two. Let $Gal(E : F ) = \{ 1, \sigma \}.$ We write ... More
$L^p$ and Sobolev boundedness of pseudodifferential operators with non-regular symbol: a regularisation approachNov 04 2010In this paper we investigate $L^p$ and Sobolev boundedness of a certain class of pseudodifferential operators with non-regular symbols. We employ regularisation methods, namely convolution with a net of mollifiers $(\rho_\eps)_\eps$, and we study the ... More
Nicht-propositionales Wissen aus Literaturlektüre und Bedingungen seiner Darstellbarkeit in Wikipedia-Einträgen zu literarischen WerkenSep 14 2015(English title) Wikipedia entries on fiction: Under what terms is it possible to report about non-propositional knowledge gained from reading? Given that Wikipedia entries are likely to extert a strong influence on how literary texts are perceived - due ... More
A symmetry result in $\mathbb{R}^2$ for global minimizers of a general type of nonlocal energyAug 16 2017Jan 17 2019In this paper, we are interested in a general type of nonlocal energy, defined as \[ \mathcal E (u, B_R)= \iint_{{\mathbb R}^{2n}\setminus (\mathcal C B_R)^2} F( u(x)-u(y),x-y)\, dx \, dy+\int_{B_R} W(u)\, dx.\] We prove that in $\mathbb R^2$, under given ... More
Almost Vanishing Polynomials for Sets of Limited Precision PointsJul 22 2008Aug 24 2008Let X be a set of s points whose coordinates are known with only limited From the numerical point of view, given a set X of s real points whose coordinates are known with only limited precision, each set X* of real points whose elements differ from those ... More
Transferring Davey`s Theorem on Annihilators in Bounded Distributive Lattices to Modular Congruence Lattices and RingsSep 03 2017Congruence lattices of semiprime algebras from semi--degenerate congruence--modular varieties fulfill the equivalences from B. A. Davey`s well--known characterization theorem for $m$--Stone bounded distributive lattices, moreover, changing the cardinalities ... More
Co-Stone residuated latticesJan 02 2010In this paper we present some applications of the reticulation of a residuated lattice, in the form of a transfer of properties between the category of bounded distributive lattices and that of residuated lattices through the reticulation functor. The ... More
A Large-Scale Regularity Theory for Random Elliptic Operators on the Half-Space with Homogeneous Neumann Boundary DataMar 13 2017In this note we derive large-scale regularity properties of solutions to second-order linear elliptic equations with random coefficients on the half- space with homogeneous Neumann boundary data; it is a companion to arXiv:1604.02717 in which the situation ... More
Sonoluminescence as quantum vacuum radiationJun 15 1995Sonoluminescence is explained in terms of quantum radiation by moving interfaces between media of different polarizability. It can be considered as a dynamic Casimir effect, in the sense that it is a consequence of the imbalance of the zero-point fluctuations ... More
Evolutionary population synthesis: models, analysis of the ingredients and application to high-z galaxiesOct 07 2004Jun 22 2005Evolutionary population synthesis models for a wide range of metallicities, ages, star formation histories, and Horizontal Branch morphologies, including blue morphologies at high metallicity, are computed. The energetics of the post Main Sequence evolutionary ... More
TP-AGB stars to date high-redshift galaxies with the Spitzer Space TelescopeFeb 11 2004We present new stellar population models that include the contribution of the Thermally Pulsing Asymptotic Giant Branch (TP-AGB) phase also in the synthetic spectral energy distribution (SED). The TP-AGB phase is essential for a correct modeling of intermediate-age ... More
Stellar Population ModelsJan 21 2003This review deals with stellar population models computed by means of the evolutionary synthesis technique that was pioneered by Beatrice Tinsley roughly three decades ago. The focus is on the simplest models, the so called Simple Stellar Populations, ... More
Why Galaxies Care about AGB Stars. Modelling GalaxiesMar 31 2011The Thermally-Pulsating Asymptotic Giant Branch (TP-AGB) phase of stellar evolution has received attention only recently in galaxy evolution, but is now an important player in our understanding of how galaxies form and evolve. Because it is a short but ... More
A Note on Congruences of Infinite Bounded Involution LatticesSep 29 2018We prove that, under the Generalized Continuum Hypothesis, an infinite bounded involution lattice can have any number of (involution preserving lattice) congruences between $2$ and its number of subsets, regardless of its number of ideals.
Some observations on the Green function for the ball in the fractional Laplace frameworkFeb 23 2015Apr 14 2016We consider a fractional Laplace equation and we give a self-contained elementary exposition of the representation formula for the Green function on the ball. In this exposition, only elementary calculus techniques will be used, in particular, no probabilistic ... More
Sufficient conditions of local solvability for partial differential operators in the Colombeau contextFeb 03 2009We provide sufficient conditions of local solvability for partial differential operators with variable Colombeau coefficients. We mainly concentrate on operators which admit a right generalized pseudodifferential parametrix and on operators which are ... More
Cancelling Congruences of Lattices, While Keeping Their Numbers of Filters and IdealsOct 27 2017Feb 18 2019In this paper, we study the congruences, prime filters and prime ideals of horizontal sums of bounded lattices, then, through a construction based on horizontal sums and without enforcing the Continuum Hypothesis, we are modifying an example from \cite{eucard} ... More
Generalized Fourier Integral Operators on spaces of Colombeau typeMar 03 2008Generalized Fourier integral operators (FIOs) acting on Colombeau algebras are defined. This is based on a theory of generalized oscillatory integrals (OIs) whose phase functions as well as amplitudes may be generalized functions of Colombeau type. The ... More
An approximation of the Gröbner basis of ideals of perturbed points, part IMar 06 2007We develop a method for approximating the Gr\"obner basis of the ideal of polynomials which vanish at a finite set of points, when the coordinates of the points are known with only limited precision. The method consists of a preprocessing phase of the ... More
Topological structures in Colombeau algebras: topological $\widetilde{\C}$-modules and duality theoryJul 01 2004Feb 12 2005We study modules over the ring $\widetilde{\C}$ of complex generalized numbers from a topological point of view, introducing the notions of $\widetilde{\C}$-linear topology and locally convex $\widetilde{\C}$-linear topology. In this context particular ... More
Matrix computations on projective modules using noncommutative Gröbner basesOct 18 2015Constructive proofs of fact that a stably free left $S$-module $M$ with rank$(M)\geq$sr$(S)$ is free, where sr$(S)$ denotes the stable rank of an arbitrary ring $S$, were developed in some articles. Additionally, in such papers, are presented algorithmic ... More
Kármán Vortex Street in incompressible fluid modelsMay 19 2019This paper aims to provide a robust model for the well-known phenomenon of K\'arm\'an Vortex Street arising in Fluid Mechanics. The first theoretical attempt to model this pattern was given by von K\'arm\'an [22, 23]. He considered two parallel staggered ... More
Further Functorial Properties of the ReticulationFeb 13 2009In this article we prove a set of preservation properties of the reticulation functor for residuated lattices (for instance preservation of subalgebras, finite direct products, inductive limits, Boolean powers) and we transfer certain properties between ... More
Thick subcategories of finite algebraic triangulated categoriesOct 01 2010We classify the thick subcategories of an algebraic triangulated standard category with finitely many indecomposable objects.
Jet cross sections in neutral current deep inelastic scattering at ZEUS and determination of alphasJun 11 2010The latest results on jet cross sections in neutral current deep inelastic $ep$ scattering from the ZEUS Collaboration are presented. The new results were used to perform stringent tests of perturbative QCD and extract precise values of the strong coupling. ... More
Growth rates of dimensional invariants of compact quantum groups and a theorem of Hoegh-Krohn, Landstad and StormerJan 24 2011Feb 04 2011We give local upper and lower bounds for the eigenvalues of the modular operator associated to an ergodic action of a compact quantum group on a unital C*-algebra. They involve the modular theory of the quantum group and the growth rate of quantum dimensions ... More
Nontrivial twisted sums for finite height spaces under Martin's AxiomAug 01 2018Sep 09 2018We show that if we assume Martin's Axiom, then there exists a nontrivial twisted sum of c_0 and C(K), for every compact space K with finite height and weight at least continuum. This result settles the problem of existence of nontrivial twisted sums of ... More
Probabilistic Rewriting: Relations between Normalization, Termination, and Unique Normal FormsApr 16 2018Mar 26 2019While a mature body of work supports the study of rewriting systems, even infinitary ones, abstract tools for Probabilistic Rewriting are still limited. Here, we investigate questions such as uniqueness of the result (unique limit distribution) and normalizing ... More
Some Properties of Lattice Congruences Preserving Involutions and Their Largest Numbers in the Finite CaseFeb 14 2018Dec 06 2018In this paper, we characterize the congruences of an arbitrary i--lattice, investigate the structure of the lattice they form and how it relates to the structure of the lattice of lattice congruences, then, for an arbitrary non--zero natural number $n$, ... More
Filtered-graded transfer of noncommutative Gröbner basesOct 25 2015As the case of free $\Bbbk$-algebras and $PBW$ algebras, given a bijective skew $PBW$ extension $A$, we will show that it is possible transfer Gr\"obner bases between $A$ and its associated graded ring.
On hyperbolic equations and systems with non-regular time dependent coefficientsApr 14 2015In this paper we study higher order weakly hyperbolic equations with time dependent non-regular coefficients. The non-regularity here means less than H\"older, namely bounded coefficients. As for second order equations in \cite{GR:14} we prove that such ... More
The representation category of the Woronowicz quantum group S_mu U(d) as a braided tensor C*-categoryFeb 14 2006An abstract characterization of the representation category of the Woronowicz twisted SU(d) group is given, generalizing analogous results known in the classical case
Formulas for the coefficients of half-integral weight harmonic Maass formsSep 24 2012Oct 10 2012Recently, Bruinier and Ono proved that the coefficients of certain weight -1/2 harmonic weak Maa{\ss} forms are given as "traces" of singular moduli for harmonic weak Maa{\ss} forms. Here, we prove that similar results hold for the coefficients of harmonic ... More
Stone Commutator LatticesFeb 21 2018In this paper, we are transferring Davey's characterization of $m$-Stone bounded distributive lattices to commutator lattices, and obtain related results on prime, radical, complemented and compact elements, annihilators and congruences of commutator ... More
Nontrivial twisted sums for finite height spaces under Martin's AxiomAug 01 2018Feb 25 2019We show that if we assume Martin's Axiom, then there exists a nontrivial twisted sum of c_0 and C(K), for every compact space K with finite height and weight at least continuum. This result settles the problem of existence of nontrivial twisted sums of ... More
Pseudo-differential operators in algebras of generalized functions and global hypoellipticityFeb 14 2005The aim of this work is to develop a global calculus for pseudo-differential operators acting on suitable algebras of generalized functions. In particular, a condition of global hypoellipticity of the symbols gives a result of regularity for the corresponding ... More
Dense Elements and Classes of Residuated LatticesJan 12 2009In this paper we study the dense elements and the radical of a residuated lattice, residuated lattices with lifting Boolean center, simple, local, semilocal and quasi-local residuated lattices. BL-algebras have lifting Boolean center; moreover, Glivenko ... More
Differentiation with stratification: a principle of theoretical physics in the tradition of the memory artMar 24 2015The Art of Memory started with Aristotle's questions on memory. During its long evolution, it had important contributions from alchemist, was transformed by Ramon Llull and apparently ended with Giordano Bruno, who was considered the best known representative ... More
The space density of z>4 blazarsJan 09 2019High redshift blazars are an important class of Active Galactic Nuclei (AGN) that can provide an independent estimate of the supermassive black-hole mass function in high redshift radio-loud AGN without the bias due to absorption along the line-of-sight. ... More
Testing the blast-wave AGN feedback scenario in MCG-03-58-007Jun 03 2019We report the first Atacama large millimeter/submillimeter array observations of MCG-03-58-007, a local ($z=0.03236\pm0.00002$, this work) AGN ($L_{AGN}\sim10^{45}~\rm erg~s^{-1}$), hosting a powerful X-ray ultra-fast ($v=0.1c$) outflow (UFO). The CO(1-0) ... More
Astro2020 Science White Paper: Exploration and characterization of the earliest epoch of galaxy formation: beyond the re-ionization eraJul 08 2019State-of-the-art rest-frame UV and FIR photometric and spectroscopic observations are now pushing the redshift frontiers of galaxy formation studies up to $z\sim9-11$ and beyond. Recent HST observations unveiled the presence of a star-forming galaxy exhibiting ... More
Multidimensional Iterative Filtering method for the decomposition of high-dimensional non-stationary signalsJul 26 2015Iterative Filtering (IF) is an alternative technique to the Empirical Mode Decomposition (EMD) algorithm for the decomposition of non-stationary and non-linear signals. Recently in [1] IF has been proved to be convergent for any $L^2$ signal and its stability ... More
Numerical Analysis for Iterative Filtering with New Efficient Implementations Based on FFTFeb 05 2018Oct 25 2018Real life signals are in general non--stationary and non--linear. The development of methods able to extract their hidden features in a fast and reliable way is of high importance in many research fields. In this work we tackle the problem of further ... More
Classical Renormalization of Codimension-two Brane CouplingsOct 25 2007The curvature on codimension-two and higher branes is not regular for arbitrary matter sources. Nevertheless, the low-energy theory for an observer on such a brane should be well-defined and independent to any regularization procedure. This is achieved ... More
The Effective Field Theory of Codimension-two BranesJul 06 2007Jan 28 2008Distributional sources of matter on codimension-two and higher branes are only well-defined as regularized objects. Nevertheless, intuition from effective field theory suggests that the low-energy physics on such branes should be independent of any high-energy ... More
An Introduction to Cascading Gravity and DegravitationOct 01 2008Cascading gravity is an explicit realization of the idea of degravitation, where gravity behaves as a high-pass filter. This could explain why a large cosmological constant does not backreact as much as anticipated from standard General Relativity. The ... More
Representing sparse Gaussian DAGs as sparse R-vines allowing for non-Gaussian dependenceApr 14 2016Modeling dependence in high dimensional systems has become an increasingly important topic. Most approaches rely on the assumption of a joint Gaussian distribution such as statistical models on directed acyclic graphs (DAGs). They are based on modeling ... More
Liouville principles and a large-scale regularity theory for random elliptic operators on the half-spaceApr 10 2016We consider the large-scale regularity of solutions to second-order linear elliptic equations with random coefficient fields. In contrast to previous works on regularity theory for random elliptic operators, our interest is in the regularity at the boundary: ... More
Strongly Cohen-Macaulay ideals of small second analytic deviationOct 02 2002We characterize the strongly Cohen-Macaulay ideals of second analytic deviation one in terms of depth properties of the powers of the ideal in the `standard range.' This provides an explanation of the behaviour of certain ideals that have appeared in ... More
Skewness as a test of the equivalence principleMar 01 2004The skewness of the large scale distribution of matter has long been known to be a probe of gravitational clustering. Here we show that the skewness is also a probe of violation of the equivalence principle between dark matter and baryons. The predicted ... More
Deontic Logic for Human ReasoningApr 28 2014Sep 18 2014Deontic logic is shown to be applicable for modelling human reasoning. For this the Wason selection task and the suppression task are discussed in detail. Different versions of modelling norms with deontic logic are introduced and in the case of the Wason ... More
Supervised Learning in Spiking Neural Networks with FORCE TrainingSep 08 2016Nov 10 2016Populations of neurons display an extraordinary diversity in the types of problems they solve and behaviors they display. Techniques have recently emerged that allow us to create networks of model neurons that solve tasks of similar complexity. Examples ... More
Quasi-coassociative C*-quantum groupoids of type A and modular C*-categoriesJun 08 2015Oct 18 2015We construct a new class of finite-dimensional C^*-quantum groupoids at roots of unity q=e^{i\pi/\ell}, with limit the discrete dual of the classical SU(N) for large orders. The representation category of our groupoid turns out to be tensor equivalent ... More
Nonlocal diffusion and applicationsApr 30 2015Jun 30 2016We consider the fractional Laplace framework and provide models and theorems related to nonlocal diffusion phenomena. Some applications are presented, including: a simple probabilistic interpretation, water waves, crystal dislocations, nonlocal phase ... More
Ludics with repetitions (Exponentials, Interactive types and Completeness)Apr 04 2011May 14 2011Ludics is peculiar in the panorama of game semantics: we first have the definition of interaction-composition and then we have semantical types, as a set of strategies which "behave well" and react in the same way to a set of tests. The semantical types ... More
Massive gravity from Dirichlet boundary conditionsOct 28 2009Apr 23 2010We propose an explicit non-linear realization of massive gravity, which relies on the introduction of a spurious compact extra dimension, on which we impose half-Newmann and half-Dirichlet boundary conditions. At the linearized level, we recover the expected ... More
Pair-copula Bayesian networksNov 23 2012Pair-copula Bayesian networks (PCBNs) are a novel class of multivariate statistical models, which combine the distributional flexibility of pair-copula constructions (PCCs) with the parsimony of conditional independence models associated with directed ... More
Lectures on mathematical aspects of (twisted) supersymmetric gauge theoriesJan 12 2014Supersymmetric gauge theories have played a central role in applications of quantum field theory to mathematics. Topologically twisted supersymmetric gauge theories often admit a rigorous mathematical description: for example, the Donaldson invariants ... More
Exact Casimir-Polder potentials: interaction of an atom with a conductor-patched dielectric surfaceAug 14 2012We study the interaction between a neutral atom or molecule and a conductor-patched dielectric surface. We model this system by a perfectly reflecting disc lying atop of a non-dispersive dielectric half-space, both interacting with the neutral atom or ... More
General Lepton Mixing in Holographic Composite Higgs ModelsOct 20 2011Feb 17 2012We introduce a scenario of lepton mixing in holographic composite Higgs models based on non-abelian discrete symmetries of the form G_f=X x Z_N, broken to Z_2 x Z_2 x Z_N in the elementary sector and to Z_N^(D) in the composite sector with Z_N^(D) being ... More
Galileons in the SkyApr 24 2012Aug 16 2013We review the different frameworks in which Galileon scalar fields have been seen to emerge such an in DGP, New Massive Gravity and Ghost-free massive Gravity and emphasize their relation with the Lovelock invariant in braneworld models. The existence ... More
Fitting Neutrino Physics with a U(1)_R Lepton NumberMar 23 2012Apr 03 2012We study neutrino physics in the context of a supersymmetric model where a continuous R-symmetry is identified with the total Lepton Number and one sneutrino can thus play the role of the down type Higgs. We show that R-breaking effects communicated to ... More
Turbulence modeling by time-series methodsMay 30 2012A general model for stationary, time-wise turbulent velocity is presented and discussed. This approach, inspired by modeling ideas of Barndorff-Nielsen and Schimgel, is coherent with the K41 hypothesis of local isotropy, and it allows us to separate second-order ... More
Polytropic models of filamentary interstellar clouds -II. Helical magnetic fieldsOct 22 2014We study the properties of magnetised cylindrical polytropes as models for interstellar filamentary clouds, extending the analysis presented in a companion paper (Toci & Galli 2014a). We formulate the general problem of magnetostatic equilibrium in the ... More
Exponentially accurate Hamiltonian embeddings of symplectic A-stable Runge--Kutta methods for Hamiltonian semilinear evolution equationsAug 22 2012Feb 09 2015We prove that a class of A-stable symplectic Runge--Kutta time semidiscretizations (including the Gauss--Legendre methods) applied to a class of semilinear Hamiltonian PDEs which are well-posed on spaces of analytic functions with analytic initial data ... More
Answering the "why" in Answer Set Programming - A Survey of Explanation ApproachesSep 21 2018Artificial Intelligence (AI) approaches to problem-solving and decision-making are becoming more and more complex, leading to a decrease in the understandability of solutions. The European Union's new General Data Protection Regulation tries to tackle ... More
Detecting regime switches in the dependence structure of high dimensional financial dataFeb 09 2012Misperceptions about extreme dependencies between different financial assets have been an im- portant element of the recent financial crisis. This paper studies inhomogeneity in dependence structures using Markov switching regular vine copulas. These ... More
Symmetrisers and generalised solutions for strictly hyperbolic systems with singular coefficientsApr 12 2011Aug 11 2011This paper is devoted to strictly hyperbolic systems and equations with non-smooth coefficients. Below a certain level of smoothness, distributional solutions may fail to exist. We construct generalised solutions in the Colombeau algebra of generalised ... More
Zero-Hopf bifurcation in the general Van der Pol-Duffing equationJun 05 2019We investigate the dynamical behavior of the general Van der Pol-Duffing equation $\dot{x}=-\nu \left(x^3-\mu x-y\right)$, $ \dot{y}=-h z+k x-\alpha y$, $\dot{z}=\beta y$. This model generalizes the behavior of a Van der Pol-Duffing circuit with parallel ... More
Gender Classification from Iris Texture Images Using a New Set of Binary Statistical Image FeaturesMay 01 2019Soft biometric information such as gender can contribute to many applications like as identification and security. This paper explores the use of a Binary Statistical Features (BSIF) algorithm for classifying gender from iris texture images captured with ... More
Reparametrization invariant normsFeb 05 2007This paper explores the concept of reparametrization invariant norm (RPI-norm), that is any norm invariant under composition with diffeomorphisms. We prove the existence of an infinite family of RPI-norms, called standard RPI-norms, for which we exhibit ... More
Applying a phase field approach for shape optimization of a stationary Navier-Stokes flowJul 21 2014We apply a phase field approach for a general shape optimization problem of a stationary Navier-Stokes flow. To be precise we add a multiple of the Ginzburg--Landau energy as a regularization to the objective functional and relax the non-permeability ... More