Results for "Mario Ballardini"

total 4399took 0.11s
Constraining primordial non-Gaussianity using two galaxy surveys and CMB lensingJun 11 2019Next-generation galaxy surveys will be able to measure perturbations on scales beyond the equality scale. On these ultra-large scales, primordial non-Gaussianity leaves signatures that can shed light on the mechanism by which perturbations in the early ... More
Probing primordial features with the primary CMBJul 15 2018CMB photons travel from the last scattering surface, when the primary CMB has been generated, along the surface of the light cone to us. During their travel, they are affected by many secondary effects such as the integrated Sachs-Wolfe effect and CMB ... More
Probing primordial features with the primary CMBJul 15 2018Mar 08 2019CMB photons travel from the last scattering surface, when the primary CMB has been generated, along the surface of the light cone to us. During their travel, they are affected by many secondary effects such as the integrated Sachs-Wolfe effect and CMB ... More
Measuring ISW with next-generation radio surveysDec 04 2018Feb 13 2019The late-time integrated Sachs-Wolfe (ISW) signal in the CMB temperature anisotropies is an important probe of dark energy when it can be detected by cross-correlation with large-scale structure surveys. Because of their huge sky area, surveys in the ... More
A conservative assessment of the current constraints on dark matter annihilation from Cosmic Rays and CMB observationsAug 31 2015In view of the current interest in combining different observations to constraint annihilating WIMP dark matter, we examine the relation between the Sommerfeld effect at the recombination epoch and in the galactic halo. By considering an up-to-date collection ... More
CMB anisotropies generated by a stochastic background of primordial magnetic fields with non-zero helicityDec 04 2014Aug 08 2015We consider the impact of a stochastic background of primordial magnetic fields with non-vanishing helicity on CMB anisotropies in temperature and polarization. We compute the exact expressions for the scalar, vector and tensor part of the energy-momentum ... More
Probing primordial features with future galaxy surveysJun 12 2016We study the capability of future measurements of the galaxy clustering power spectrum to probe departures from a power-law spectrum for primordial fluctuations. On considering the information from the galaxy clustering power spectrum up to quasi-linear ... More
Probing primordial features with next-generation photometric and radio surveysDec 20 2017Apr 04 2018We investigate the possibility of using future photometric and radio surveys to constrain the power spectrum of primordial fluctuations that is predicted by inflationary models with a violation of the slow-roll phase. We forecast constraints with a Fisher ... More
Testing extended Jordan-Brans-Dicke theories with future cosmological observationsFeb 04 2019The extended Jordan-Brans-Dicke (eJBD) theory of gravity is constrained by a host of astrophysical and cosmological observations spanning a wide range of scales. The current cosmological constraints on the first post-Newtonian parameter in these simplest ... More
CMB and BAO constraints for an induced gravity dark energy model with a quartic potentialJul 02 2015We study the predictions for structure formation in an induced gravity dark energy model with a quartic potential. By developing a dedicated Einstein-Boltzmann code, we study self-consistently the dynamics of homogeneous cosmology and of linear perturbations ... More
Cosmological constraints on induced gravity dark energy modelsJan 13 2016We study induced gravity dark energy models coupled with a simple monomial potential $\propto \sigma^n$ and a positive exponent $n$. These simple potentials lead to viable dark energy models with a weak dependence on the exponent, which characterizes ... More
On the ISW-cluster cross-correlation in future surveysDec 06 2017Nov 22 2018We investigate the cosmological information contained in the cross-correlation between the Integrated Sachs-Wolfe (ISW) of the Cosmic Microwave Background (CMB) anisotropy pattern and galaxy clusters from future wide surveys. Future surveys will provide ... More
Probing features in inflaton potential and reionization history with future CMB space observationsOct 03 2017Apr 04 2018We consider the prospects of probing features in the primordial power spectrum with future Cosmic Microwave Background (CMB) polarization measurements. In the scope of the inflationary scenario, such features in the spectrum can be produced by local non-smooth ... More
Cosmology with Phase 1 of the Square Kilometre Array; Red Book 2018: Technical specifications and performance forecastsNov 07 2018We present a detailed overview of the cosmological surveys that will be carried out with Phase 1 of the Square Kilometre Array (SKA1), and the science that they will enable. We highlight three main surveys: a medium-deep continuum weak lensing and low-redshift ... More
Information -sharing, adaptive epigenetics and human longevityJul 20 2014Emerging empirical and theoretical thinking about human aging places considerable value upon the role of the environment as a major factor which can promote prolonged healthy longevity. Our contemporary, information-rich environment is taken to mean not ... More
Scaling of Chaos in Strongly Nonlinear LatticesOct 30 2013Dec 16 2013Although it is now understood that chaos in complex classical systems is the foundation of thermodynamic behavior, the detailed relations between the microscopic properties of the chaotic dynamics and the macroscopic thermodynamic observations still remain ... More
Quantum process tomography: the role of initial correlationsMar 19 2006Sep 01 2006We address the problem of quantum process tomography with the preparators producing states correlated with the environmental degrees of freedom that play role in the system-environment interactions. We discuss the physical situations, in which the dynamics ... More
Spectra of Quantized Walks and a $\sqrt{δε}$ ruleJan 10 2004We introduce quantized bipartite walks, compute their spectra, generalize the algorithms of Grover \cite{g} and Ambainis \cite{amb03} and interpret them as quantum walks with memory. We compare the performance of walk based classical and quantum algorithms ... More
The key role of the Calan/Tololo project in the discovery of the accelerating UniverseOct 10 2011Dec 04 2011The Nobel Prize in Physics 2011 has just been awarded to three astronomers: Saul Perlmutter, Brian Schmidt, and Adam Riess, for their amazing discovery of the accelerating expansion of the Universe. Without diminishing the achievement of our community's ... More
The Standard Candle Method for Type II Supernovae and the Hubble ConstantSep 04 2003The "standard candle method" for Type II plateau supernovae produces a Hubble diagram with a dispersion of 0.3 mag, which implies that this technique can produce distances with a precision of 15%. Using four nearby supernovae with Cepheid distances I ... More
Dynamical response functions in models of vibrated granular mediaSep 25 1998In recently introduced schematic lattice gas models for vibrated dry granular media, we study the dynamical response of the system to small perturbations of shaking amplitudes and its relations with the characteristic fluctuations. Strong off equilibrium ... More
Ferromagnetic ground states of the Hubbard model on a complete graphMar 27 1996We use group theory to derive the exact analytical expression of the ferromagnetic ground states of the Hubbard model on a complete graph for arbitrary lattice sites f and for arbitrary fillings $N$. We find that for $t>0$ and for $N=f+1$ the ground state ... More
Type Ia Supernovae and their implications for cosmologyMay 16 2000Models for Type Ia Supernovae (SNe Ia) are reviewed. It is shown that there are strong reasons to believe that most SNe Ia represent thermonuclear disruptions of C-O white dwarfs, when these white dwarfs reach the Chandrasekhar limit and ignite carbon ... More
Accretion Disks: Limit Cycles and InstabilitiesOct 02 1998The existing disk instability model for dwarf nova eruptions is reviewed, in the light of recent progress in the understanding of angular momentum transport in accretion disks. It is proposed that the standard lower branch in the ``S-curve'' in the effective ... More
On particle acceleration around shocks. IDec 16 2002Mar 28 2003We derive a relativistically covariant (although not manifestly so) equation for the distribution function of particles accelerated at shocks, which applies also to extremely relativistic shocks, and arbitrarily anisotropic particle distributions. The ... More
The equilibrium limit of the Casati-Prosen modelMar 19 2006An alternative explanation of the decoherence in the Casati-Prosen model is presented. It is based on the Self Induced Decoherence formalism extended to non-integrable systems.
The classical regime of a quantum universe obtained through a functional methodJun 03 2000The functional method, introduced to deal with systems endowed with a continuous spectrum, is used to study the problem of decoherence and correlations in a simple cosmological model.
Systematic error mitigation in multiple field astrometryMay 13 2011Combination of more than two fields provides constraints on the systematic error of simultaneous observations. The concept is investigated in the context of the Gravitation Astrometric Measurement Experiment (GAME), which aims at measurement of the PPN ... More
Challenges to the Bohr Wave Particle Complementarity PrincipleOct 30 2012Contrary to the Bohr complementarity principle, in 1995 Rabinowitz proposed that by using entangled particles from the source it would be possible to determine which slit a particle goes through while still preserving the interference pattern in the Young ... More
Little Black Holes as Dark Matter Candidates with Feasible Cosmic and Terrestrial InteractionsMar 09 2005Little black holes (LBH) contribute to the accelerated expansion of the Universe, and interact with stars, neutron stars, and planets. A range of proposals are reviewed in which LBH are considered to be a component of dark matter/dark energy. A LBH is ... More
Dark matter candidates: black holes and gravitationally bound black hole atoms in n-spaceMar 11 2003Mar 07 2005A comparison is made of a range of proposals to include free and bound black holes as either a small component or the dominant constituent of dark matter. The hypothesis that dark matter consists of atomic gravitationally bound primordial black holes ... More
Examination of Wave-Particle Duality Via Two-Slit InterferenceFeb 18 2003The wave-particle duality is the main point of demarcation between quantum and classical physics, and is the quintessential mystery of quantum mechanics. Young's two-slit interference experiment is the arch prototype of actual and gedanken experiments ... More
Is Quantum Mechanics Incompatible with Newton's First LawMay 30 2007Apr 11 2008Quantum mechanics (QM) clearly violates Newton's First Law of Motion (NFLM) in the quantum domain for one of the simplest problems, yielding an effect in a force-free region much like the Aharonov-Bohm effect. In addition, there is an incompatibility ... More
Advanced Power Transmission of the FutureApr 19 2003Electric power is a vital ingredient of modern society. This article is written to provide an insight into the physics and engineering that go into the transmission of electric power and its potential modernization. Topics covered will be Transmission ... More
No stable gravitationally or electrostatically bound atoms in n-space for n > 3Feb 27 2003Mar 30 2003It is demonstrated in general that stable gravitational or electrostatic orbits are not possible for spatial dimensions n >=4, and in particular atoms cannot be bound by energy constraints in higher dimensions. Furthermore, angular momentum cannot be ... More
Superconducting Power GenerationFeb 20 2003The superconducting ac generator has the greatest potential for large-scale commercial application of superconductivity that can benefit the public. Electric power is a vital ingredient of modern society, and generation may be considered to be the vital ... More
Macroscopic Hadronic Little Black Hole InteractionsApr 03 2001Although the extraordinary weakness of gravity makes it by far the weakest of the interactions, viewing little black holes (LBH) as a class of elementary particles puts them in a league with hadrons as strongly interacting particles. They interact strongly ... More
On the persistence of invariant curves for Fibered Holomorphic TransformationsJan 16 2008We consider the problem of the persistence of invariant curves for analytical fibered holomorphic transformations. We define a fibered rotation number associated to an invariant curve. We show that an invariant curve with a prescribed fibered rotation ... More
Gauged SupergravitiesSep 30 2016Oct 11 2016We give a general review of extended supergravities and their gauging using the duality-covariant embedding tensor formalism. Although the focus is on four-dimensional theories, an overview of the gauging procedure and the related tensor hierarchy in ... More
Detecting intermediate mass black holes in globular clusters with machine learningJun 28 2016Mergers of stellar-mass black holes were recently observed in the gravitational wave window opened by LIGO. This puts the spotlight on dense stellar systems and their ability to create intermediate-mass black holes (IMBHs) through repeated merging. Unfortunately, ... More
Towards Dynamic Updates in Service CompositionDec 24 2015We survey our results about verification of adaptable processes. We present adaptable processes as a way of overcoming the limitations that process calculi have for describing patterns of dynamic process evolution. Such patterns rely on direct ways of ... More
An inverse theorem in $\mathbb{F}_p$ and rainbow free coloringsNov 30 2015Let $\mathbb{F}_p$ be the field with $p$ elements with $p$ prime, $X_1,\ldots, X_n$ pairwise disjoint subsets of $\mathbb{F}_p$with at least $3$ elements such that $\sum_{i=1}^n|X_i|\leq p-5$, and $\mathbb{S}_n$ the set of permutations of $\{1,2,\ldots, ... More
Systholic Boolean Orthonormalizer Network in Wavelet Domain for SAR Image DespecklingJul 11 2016We describe a novel method for removing speckle (in wavelet domain) of unknown variance from SAR images. The me-thod is based on the following procedure: We apply 1) Bidimentional Discrete Wavelet Transform (DWT-2D) to the speckled image, 2) scaling and ... More
BMO: Oscillations, self improvement, Gagliardo coordinate spaces and reverse Hardy inequalitiesMay 11 2015Jul 11 2015A new approach to classical self improving results for $BMO$ functions is presented. "Coordinate Gagliardo spaces" are introduced and a generalized version of the John-Nirenberg Lemma is proved. Applications are provided.
Supersymmetry for Products of Random MatricesFeb 02 2015We consider the singular value statistics of products of independent random matrices. In particular we compute the corresponding averages of products of characteristic polynomials. To this aim we apply the projection formula recently introduced for chiral ... More
Characterization algorithms for shift radix systems with finiteness propertyJan 21 2014For a natural number d and a d-dimensional real vector r let Tau(r) denote the (d-dimensional) shift radix system associated with r. Tau(r) is said to have the finiteness property iff all orbits of Tau(r) end up in the zero vector; the set of all corresponding ... More
On the Symmetries and the Capacity Achieving Input Covariance Matrices of Multiantenna ChannelsJan 30 2016Jul 10 2016In this paper we study the capacity achieving input covariance matrices of a single user multiantenna channel based solely on the group of symmetries of its matrix of propagation coefficients. Our main result, which unifies and improves the techniques ... More
Linear independence measure of logarithms over affine groupsNov 30 2015Linear forms in logarithms over connected commutative algebraic groups over the algebraic numbers field have been studied widely. However, the theory of linear forms in logarithms over noncommutative algebraic groups have not been developed as the one ... More
On the Nature of TimeSep 02 2015The paper puts forward a conceptual framework in which the phenomenon of time can be presented and discussed in a proper way. We argue that change is ontologically and epistemologically a more basic phenomenon than time. Time is an abstract entity created ... More
On the characterization of Pethő's LoudspeakerOct 28 2014For $d \in \mathbb{N}$ and $\mathbf{r} \in \mathbb{C}^d$ let $\gamma_\mathbf{r}: \mathbb{Z}[\mathrm{i}]^d \to \mathbb{Z}[\mathrm{i}]^d$, where $\gamma_\mathbf{r}(\mathbf{a})=(a_2,...,a_d,$ $-\lfloor\mathbf{r}\mathbf{a}\rfloor)$ for $\mathbf{a}=(a_1,...,a_d)$, ... More
Rule of Three for Superresolution of Still Images with Applications to Compression and DenoisingMay 04 2014We describe a new method for superresolution of still images (in the wavelet domain) based on the reconstruction of missing details subbands pixels at a given ith level via Rule of Three (Ro3) between pixels of approximation subband of such level, and ... More
Totally real theta characteristicsFeb 14 2018A totally real theta characteristic of a real curve is a theta characteristic which is linearly equivalent to a sum of only real points. These are closely related to the facets of the convex hull of the canonical embedding of the curve.
Lossless compression catalyst based on binary allocation via modular arithmeticMay 05 2014Aug 15 2014A new binary (bit-level) lossless compression catalyst method based on a modular arithmetic, called Binary Allocation via Modular Arithmetic (BAMA), has been introduced in this paper. In other words, BAMA is for storage and transmission of binary sequences, ... More
Rapid mixing of Swendsen-Wang and single-bond dynamics in two dimensionsFeb 28 2012We prove that the spectral gap of the Swendsen-Wang dynamics for the random-cluster model on arbitrary graphs with m edges is bounded above by 16 m log m times the spectral gap of the single-bond (or heat-bath) dynamics. This and the corresponding lower ... More
Formalizing computability theory via partial recursive functionsOct 19 2018We present a formalization of the foundations of computability theory in the Lean theorem prover. We use primitive recursive functions and partial recursive functions as the main objects of study, including the construction of a universal partial recursive ... More
Extended Integrated Interleaved Codes over any Field with Applications to Locally Recoverable CodesMay 25 2018Jan 03 2019Integrated Interleaved (II) and Extended Integrated Interleaved (EII) codes are a versatile alternative for Locally Recoverable (LRC) codes, since they require fields of relatively small size. II and EII codes are generally defined over Reed-Solomon type ... More
Muon bundles from cosmic rays with ALICEOct 26 2017Oct 31 2017ALICE, a general purpose experiment designed to investigate nucleus-nucleus collisions at the CERN Large Hadron Collider (LHC), has also been used to detect atmospheric muons produced by cosmic-ray interactions in the atmosphere. In this contribution ... More
Semi-supervised emotion lexicon expansion with label propagation and specialized word embeddingsAug 13 2017There exist two main approaches to automatically extract affective orientation: lexicon-based and corpus-based. In this work, we argue that these two methods are compatible and show that combining them can improve the accuracy of emotion classifiers. ... More
Mellin-Barnes meets Method of Brackets: A novel approach to Mellin-Barnes representations of Feynman integralsJun 29 2017Sep 12 2017In this paper, we present a new approach to the construction of Mellin-Barnes representations for Feynman integrals inspired by the Method of Brackets. The novel technique is helpful to lower the dimensionality of Mellin-Barnes representations in complicated ... More
A Note on the Hyperbolicity Cone of the Specialized Vámos PolynomialJun 19 2013Aug 18 2015The specialized V\'amos polynomial is a hyperbolic polynomial of degree four in four variables with the property that none of its powers admits a definite determinantal representation. We will use a heuristical method to prove that its hyperbolicity cone ... More
Sequences related to the Pell generalized equationApr 04 2003Apr 14 2003We consider sequences of the type $A_n=6A_{n-1}-A_{n-2}, A_0=r, A_1=s$ ($r$ and $s$ integers) and show that all sequences that solve particular cases of the Pell generalized equation are expressible as a constant times one of four particular sequences ... More
Conversion of HOL Light proofs into MetamathDec 27 2014Jun 18 2015We present an algorithm for converting proofs from the OpenTheory interchange format, which can be translated to and from any of the HOL family of proof languages (HOL4, HOL Light, ProofPower, and Isabelle), into the ZFC-based Metamath language. This ... More
Generalized bivariate Fibonacci polynomialsNov 23 2002Jun 04 2004We define generalized bivariate polynomials, from which upon specification of initial conditions the bivariate Fibonacci and Lucas polynomials are obtained. Using essentially a matrix approach we derive identities and inequalities that in most cases generalize ... More
Polymatrix and generalized polynacci numbersOct 14 2002We consider $m$-th order linear recurrences that can be thought of as generalizations of the Lucas sequence. We exploit some interplay with matrices that again can be considered generalizations of the Fibonacci matrix. We introduce the definition of reflected ... More
How do public research labs use funding for research? A case studyMay 25 2018This paper discusses how public research organizations consume funding for research, applying a new approach based on economic metabolism of research labs, in a broad analogy with biology. This approach is applied to a case study in Europe represented ... More
Socioeconomic driving forces of scientific researchJun 13 2018Why do nations produce scientific research? This is a fundamental problem in the field of social studies of science. The paper confronts this question here by showing vital determinants of science to explain the sources of social power and wealth creation ... More
A New Classification of TechnologiesDec 11 2017This study here suggests a classification of technologies based on taxonomic characteristics of interaction between technologies in complex systems that is not a studied research field in economics of technical change. The proposed taxonomy here categorizes ... More
Additive Matrix Convolutions of Pólya Ensembles and Polynomial EnsemblesOct 25 2017Recently subclasses of polynomial ensembles for additive and multiplicative matrix convolutions were identified which were called P\'olya ensembles (or polynomial ensembles of derivative type). Those ensembles are closed under the respective convolutions ... More
Homology of finite K-areaJul 19 2010Aug 02 2010We use Gromov's K--area to define a generalized homology theory on compact smooth manifolds. In fact, this theory collects obstructions to the enlargeability of the manifold and its nontrivial submanifolds. Moreover, using the K--area homology we can ... More
Artificial intelligence technology in oncology: a new technological paradigmMay 14 2019Artificial Intelligence (AI) technology is based on theory and development of computer systems able to perform tasks that normally require human intelligence. In this context, deep learning is a family of computational methods that allow an algorithm ... More
Relative K-area homology and applicationsOct 02 2013We show an Uhlenbeck type estimate for closed simply connected manifolds which provides the existence of certain exact sequences in K-area homology. This leads to the behavior of the K-area homology under surgery. Moreover, we give an index theoretic ... More
Sampling from a couple of negatively correlated gamma variatesSep 21 2002We propose two algorithms for sampling from two gamma variates possessing a negative correlation. The case of positive correlation is easily solved, so we just mention it. The main problem is the lowest value of the correlation coefficient that can be ... More
Conformally invariant Cotton and Bach tensor in N-dimensionsAug 17 2004This paper presents conformal invariants for Riemannian manifolds of dimension greater than or equal to four whose vanishing is necessary for a Riemannian manifold to be conformally related to an Einstein space. One of the invariants is a modification ... More
A finite difference method for piecewise deterministic Markov processesJun 23 2006Jul 17 2006An extension of non-deterministic processes driven by the random telegraph signal is introduced in the framework of "piecewise deterministic Markov processes" [Davis], including a broader category of random systems. The corresponding Liouville-Master ... More
On the excursions of drifted Brownian motion and the successive passage times of Brownian motionApr 05 2016By using the law of the excursions of Brownian motion with drift, we find the distribution of the $n-$th passage time of Brownian motion through a straight line $S(t)= a + bt.$ In the special case when $b = 0,$ we extend the result to a space-time transformation ... More
File Managing and Program Execution in Web Operating SystemsMay 27 2010Web Operating Systems can be seen as an extension of traditional Operating Systems where the addresses used to manage files and execute programs (via the basic load/execution mechanism) are extended from local filesystem path-names to URLs. A first consequence ... More
Technological integration and hyper-connectivity: Tools for promoting extreme human lifespansFeb 27 2014Artificial, neurobiological, and social networks are three distinct complex adaptive systems (CAS), each containing discrete processing units (nodes, neurons, and humans respectively). Despite the apparent differences, these three networks are bound by ... More
Notes on optimality of direct characterisation of quantum dynamicsMar 17 2006We argue that the claimed optimality of a new process tomography method suggested in [quant-ph/0601033] and [quant-ph/0601034] is based on not completely fair comparison that does not take into account the available information in an equal way. We also ... More
The acceleration of the Universe in the light of supernovae -- The key role of the Cerro Tololo Inter-American ObservatoryNov 20 2013Dec 09 2013The discovery of acceleration and dark energy arguably constitutes the most revolutionary discovery in astrophysics in recent years. Cerro Tololo Inter-American Observatory (CTIO) played a key role in this amazing discovery through three systematic supernova ... More
Observed and physical properties of type II plateau supernovaeOct 01 2003I use photometry and spectroscopy data for 24 Type II plateau supernovae to examine their observed and physical properties. This dataset shows that these objects encompass a wide range in their observed properties (plateau luminosities, tail luminosities, ... More
On the Quantum Query Complexity of Detecting Triangles in GraphsOct 16 2003Nov 06 2003We show that in the quantum query model the complexity of detecting a triangle in an undirected graph on $n$ nodes can be done using $O(n^{1+{3\over 7}}\log^{2}n)$ quantum queries. The same complexity bound applies for outputting the triangle if there ... More
Charge Tempered Cosmological ModelDec 15 2004Oct 27 2005The main purpose of this work is to obtain the metric of a Charge Tempered Cosmological Model, a slightly modified Standard Cosmological Model by a small excess of charge density, distributed uniformly in accordance with the Cosmological Principle, the ... More
Percolation and Cluster Formalism in Continuous Spin SystemsOct 21 1997The generalization of Kasteleyn and Fortuin clusters formalism is introduced in XY (or more generally O(n)) models. Clusters geometrical structure may be linked to spin physical properties as correlation functions. To investigate percolative characteristics, ... More
Mapping Between Nonlinear Schödinger Equations with Real and Complex PotentialsJun 16 2013A mapping between stationary solutions of nonlinear Sch\"odinger equations with real and complex potentials is constructed and a set of exact solutions with real energies are obtained for a large class of complex potentials. As specific examples we consider ... More
SO(4) invariant basis functions for strongly correlated Fermi systemsMar 27 1996Mar 29 1996We show how to construct SO(4) invariant functions for strongly correlated Fermi systems on lattices of finite sizes. We illustrate the method on the case of the 1D Hubbard chain with four and with six sites.
How Rare Are Extraterrestrial Civilizations and When Did They Emerge?Aug 21 1998It is shown that, contrary to an existing claim, the near equality between the lifetime of the sun and the timescale of biological evolution on earth does not necessarily imply that extraterrestrial civilizations are exceedingly rare. Furthermore, on ... More
The experimental future of Neutrino OscillationsOct 03 2000After the recent experimental results on neutrino oscillations, some shape starts to emerge from the puzzle. However, the situation is still far from being clarified. First of all, accommodating all experimental results in a single and simple framework ... More
Review on new Neutrino Oscillation ExperimentsMay 19 1999Driven by new experimental results, in the latest period several new neutrino oscillation experiments have been proposed. I will outline the main ideas behind the different proposals, in particular concerning atmospheric neutrinos and neutrinos from accelerated ... More
The classical-statistical limit of quantum mechanicsMar 23 2005The classical-statistical limit of quantum mechanics is studied. It is proved that the limit $\hbar \to 0$ is the good limit for the operators algebra but it si not so for the state compact set. In the last case decoherence must be invoked to obtain the ... More
An adjusted payoff-based procedure for normal form gamesJun 28 2011We study a simple adaptive model in the framework of an $N$-player normal form game. The model consists of a repeated game where the players only know their own strategy space and their own payoff scored at each stage. The information about the other ... More
Managing Object-Oriented Integration and Regression TestingFeb 05 1999Systematic testing of object-oriented software turned out to be much more complex than testing conventional software. Especially the highly incremental and iterative development cycle demands both many more changes and partially implemented resp. re-implemented ... More
Mass Determination of New Particle StatesMay 09 2009We study theoretical and experimental facets of mass determination of new particle states. Assuming supersymmetry, we update the quark and lepton mass matrices at the grand unification scale accounting for threshold corrections enhanced by large tan beta. ... More
Coronal Gamma Ray Bursts as the sources of Ultra High Energy Cosmic Rays?Oct 30 1995I consider the possibility that Ultra High Energy Cosmic Rays are accelerated in Gamma Ray Bursts located in the Galactic corona, thus circumventing the problem raised by Greisen--Zatsepin--Kuz'min cutoff. The acceleration of UHECRs could occur in the ... More
GeV Photons from Ultra High Energy Cosmic Rays accelerated in Gamma Ray BurstsMay 09 1997Gamma-ray bursts are produced by the dissipation of the kinetic energy of a highly relativistic fireball, via the formation of a collisionless shock. When this happens, Ultra High Energy Cosmic Rays up to 10^20 eV are produced. I show in this paper that ... More
Effective Medium Response of Metallic Nanowire Arrays with a Kerr-type Dielectric HostMar 27 2013Mar 30 2013We derive an effective medium model to characterize the macroscopic electromagnetic response of metallic nanowire arrays embedded in a host dielectric with a Kerr-type nonlinear permittivity function. It is shown that the macroscopic electromagnetic fields ... More
Nonlocal Homogenization Model for a Periodic Array of Epsilon-Negative RodsFeb 20 2006Oct 26 2006We propose an effective permittivity model to homogenize an array of long thin epsilon-negative rods arranged in a periodic lattice. It is proved that the effect of spatial dispersion in this electromagnetic crystal cannot be neglected, and that the medium ... More
Falling Bodies: the Obvious,the Subtle, and the WrongFeb 19 2007Mar 28 2009An important scientific debate took place regarding falling bodies hundreds of years ago, and it still warrants introspection. Galileo argued that in a vacuum all bodies fall at the same rate relative to the earth, independent of their mass. Aristotle ... More
Vacuum Calorimetry in Exploding Wire StudiesJul 24 2003Jul 25 2003A method of using vacuum calorimetry as a means of determining directly the energy deposited in an electrically exploded wire is presented. This energy determination is compared with that given by the time integral of the product of voltage and current. ... More
Lilienfeld Transition Radiation Brought to LightJul 09 2003Presently, the term transition radiation tends to denote a somewhat different physical phenomenon than the original transition radiation discovered by J. E. Lilienfeld in 1919, and re-employed in different forms again in 1953 and 1971. Lilienfeld transition ... More
Microwave Residual Surface Resistance of SuperconductorsApr 06 2003Two distinct models account for the microwave residual surface resistance of superconducting cavities with equally good agreement with the measured temperature and frequency dependence. In presenting his phonon-generation model, Passow claimed that Rabinowitz' ... More