Results for "Lorenzo Tortora de Falco"

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A semantic account of strong normalization in Linear LogicApr 24 2013Aug 26 2014We prove that given two cut free nets of linear logic, by means of their relational interpretations one can: 1) first determine whether or not the net obtained by cutting the two nets is strongly normalizable 2) then (in case it is strongly normalizable) ... More
The relational model is injective for Multiplicative Exponential Linear Logic (without weakenings)Feb 16 2010Feb 07 2011We show that for Multiplicative Exponential Linear Logic (without weakenings) the syntactical equivalence relation on proofs induced by cut-elimination coincides with the semantic equivalence relation on proofs induced by the multiset based relational ... More
Relational type-checking for MELL proof-structures. Part 1: MultiplicativesJun 01 2016Relational semantics for linear logic is a form of non-idempotent intersection type system, from which several informations on the execution of a proof-structure can be recovered. An element of the relational interpretation of a proof-structure R with ... More
Proceedings Joint International Workshop on Linearity & Trends in Linear Logic and ApplicationsApr 12 2019This volume contains a selection of papers presented at Linearity/TLLA 2018: Joint Linearity and TLLA workshops (part of FLOC 2018) held on July 7-8, 2018 in Oxford. Linearity has been a key feature in several lines of research in both theoretical and ... More
Polynomial approximation of the Lense-Thirring rigid precession frequencyFeb 08 2018We propose a polynomial approximation of the global Lense-Thirring rigid precession frequency to study low frequency quasi-periodic oscillations around spinning black holes. This high-performing approximation allows to determine the expected frequencies ... More
Speed and entropy of an interacting continuous time quantum walkApr 10 2006Apr 27 2006We present some dynamic and entropic considerations about the evolution of a continuous time quantum walk implementing the clock of an autonomous machine. On a simple model, we study in quite explicit terms the Lindblad evolution of the clocked subsystem, ... More
Entropy generation in a model of reversible computationOct 17 2006We present a model in which, due to the quantum nature of the signals controlling the implementation time of successive unitary computational steps, \emph{physical} irreversibility appears in the execution of a \emph{logically} reversible computation. ... More
Quantum Timing and Synchronization ProblemsApr 05 2005Feynman's model of a quantum computer provides an example of a continuous-time quantum walk. Its clocking mechanism is an excitation of a basically linear chain of spins with occasional controlled jumps which allow for motion on a planar graph. The spreading ... More
Approximate analytical calculations of photon geodesics in the Schwarzschild metricAug 16 2016Aug 30 2016We develop a method for deriving approximate analytical formulae to integrate photon geodesics in a Schwarzschild spacetime. Based on this, we derive the approximate equations for light bending and propagation delay that have been introduced empirically. ... More
An Abstract Approach to Stratification in Linear LogicJun 27 2012Feb 14 2013We study the notion of stratification, as used in subsystems of linear logic with low complexity bounds on the cut-elimination procedure (the so-called light logics), from an abstract point of view, introducing a logical system in which stratification ... More
Isogeometric Analysis Simulation of TESLA Cavities Under UncertaintyNov 06 2017In the design of electromagnetic devices the accurate representation of the geometry plays a crucial role in determining the device performance. For accelerator cavities, in particular, controlling the frequencies of the eigenmodes is important in order ... More
Isogeometric Simulation of Lorentz Detuning in Superconducting Accelerator CavitiesJun 27 2016Cavities in linear accelerators suffer from eigenfrequency shifts due to mechanical deformation caused by the electromagnetic radiation pressure, a phenomenon known as Lorentz detuning. Estimating the frequency shift up to the needed accuracy by means ... More
Multiscale Modeling and Simulation of Organic Solar CellsJun 07 2012Jun 28 2012In this article, we continue our mathematical study of organic solar cells (OSCs) and propose a two-scale (micro- and macro-scale) model of heterojunction OSCs with interface geometries characterized by an arbitrarily complex morphology. The microscale ... More
The I/O complexity of hybrid algorithms for square matrix multiplicationApr 29 2019Asymptotically tight lower bounds are derived for the I/O complexity of a general class of hybrid algorithms computing the product of $n \times n$ square matrices combining ``\emph{Strassen-like}'' fast matrix multiplication approach with computational ... More
Heterogeneous causal effects with imperfect compliance: a novel Bayesian machine learning approachMay 29 2019This paper introduces an innovative Bayesian machine learning algorithm to draw inference on heterogeneous causal effects in the presence of imperfect compliance (e.g., under an irregular assignment mechanism). We show, through Monte Carlo simulations, ... More
Finite semantics of polymorphism, complexity and the power of type fixpointsFeb 01 2019Many applications of denotational semantics, such as higher-order model checking or the complexity of normalization, rely on finite semantics for monomorphic type systems. We present two constructions of finite semantics for second-order Multiplicative-Additive ... More
The I/O complexity of Strassen's matrix multiplication with recomputationMay 07 2016A tight $\Omega((n/\sqrt{M})^{\log_2 7}M)$ lower bound is derived on the \io complexity of Strassen's algorithm to multiply two $n \times n$ matrices, in a two-level storage hierarchy with $M$ words of fast memory. A proof technique is introduced, which ... More
Exploiting non-constant safe memory in resilient algorithms and data structuresMay 16 2013Apr 02 2015We extend the Faulty RAM model by Finocchi and Italiano (2008) by adding a safe memory of arbitrary size $S$, and we then derive tradeoffs between the performance of resilient algorithmic techniques and the size of the safe memory. Let $\delta$ and $\alpha$ ... More
Spectral properties of a two-orbital Anderson impurity model across a non-Fermi liquid fixed pointFeb 04 2004Feb 09 2004We study by NRG the spectral properties of a two-orbital Anderson impurity model in the presence of an exchange splitting which follows either regular or inverted Hund's rules. The phase diagram contains a non-Fermi liquid fixed point separating a screened ... More
Light Cone Black HolesNov 08 2018Mar 19 2019When probed with conformally invariant matter fields, light cones in Minkowski spacetime satisfy thermodynamical relations which are the analog of those satisfied by stationary black holes coupled to standard matter fields. These properties stem from ... More
Light Cone ThermodynamicsJul 03 2017Mar 01 2018We show that null surfaces defined by the outgoing and infalling wave fronts emanating from and arriving at a sphere in Minkowski spacetime have thermodynamical properties that are in strict formal correspondence with those of black hole horizons in curved ... More
Spectral inequalities in quantitative formApr 18 2016We review some results about quantitative improvements of sharp inequalities for eigenvalues of the Laplacian.
Phenomenological interpolation of the inclusive J/psi cross section to proton-proton collisions at 2.76 TeV and 5.5 TeVMar 11 2011Apr 24 2012We present a study of the inclusive J/psi cross section at 2.76 TeV and 5.5 TeV. The energy dependence of the cross section, rapidity and transverse momentum distributions are evaluated phenomenologically. Their knowledge is crucial as a reference for ... More
Critical exponents of the two dimensional Coulomb gas at the Berezinskii-Kosterlitz-Thouless transitionNov 10 2013Nov 25 2013The two dimensional Coulomb gas is the prototypical model of statistical mechanics displaying a special kind of phase transition, named after Berezinskii, Kosterlitz and Thouless. Physicists and mathematicians proposed several predictions about this system. ... More
The three-dimensional general relativistic Poynting-Robertson effect I: radial radiation fieldJan 11 2019In this paper we investigate the three-dimensional (3D) motion of a test particle in a stationary, axially symmetric spacetime around a central compact object, under the influence of a radiation field. To this aim we extend the two-dimensional (2D) version ... More
Isogeometric Mortar Coupling for Electromagnetic ProblemsDec 27 2018This paper discusses and analyses two domain decomposition approaches for electromagnetic problems that allow the combination of domains discretised by either N\'ed\'elec-type polynomial finite elements or spline-based isogeometric analysis. The first ... More
Power spectrum of gravitational waves from unbound compact binariesSep 18 2012Unbound interacting compact binaries emit gravitational radiation in a wide frequency range. Since short burst-like signals are expected in future detectors, such as LISA or advanced LIGO, it is interesting to study their energy spectrum and the position ... More
Learning Sets with Separating KernelsApr 16 2012Nov 25 2014We consider the problem of learning a set from random samples. We show how relevant geometric and topological properties of a set can be studied analytically using concepts from the theory of reproducing kernel Hilbert spaces. A new kind of reproducing ... More
Compact binary coalescences: Constraints on waveformsJun 03 2019To obtain gravitational waveforms, results of analytical approximations for the early phase of compact binary coalescences (CBCs) are `stitched' with --or calibrated against-- numerical simulations for the late phase. Each of these calculations requires ... More
Faber-Krahn inequalities in sharp quantitative formJun 03 2013The classical Faber-Krahn inequality asserts that balls (uniquely) minimize the first eigenvalue of the Dirichlet-Laplacian among sets with given volume. In this paper we prove a sharp quantitative enhancement of this result, thus confirming a conjecture ... More
An algorithm to describe the solution set of any tropical linear system $A\odot x=B\odot x$Jul 29 2010Jan 21 2011An algorithm to give an explicit description of all the solutions to any tropical linear system $A\odot x=B\odot x$ is presented. The given system is converted into a finite (rather small) number $p$ of pairs $(S,T)$ of classical linear systems: a system ... More
Remote Tracking via Encoded Information for Nonlinear SystemsJan 21 2005The problem addressed in this paper is to control a plant so as to have its output tracking (a family of) reference commands generated at a remote location and transmitted through a communication channel of finite capacity. The uncertainty due to the ... More
Multi-Scale Vector Quantization with Reconstruction TreesJul 08 2019We propose and study a multi-scale approach to vector quantization. We develop an algorithm, dubbed reconstruction trees, inspired by decision trees. Here the objective is parsimonious reconstruction of unsupervised data, rather than classification. Contrasted ... More
A nilpotency criterion for some verbal subgroupsDec 05 2018The word $w=[x_{i_1},x_{i_2},\dots,x_{i_k}]$ is a simple commutator word if $k\geq 2, i_1\neq i_2$ and $i_j\in \{1,\dots,m\}$, for some $m>1$. For a finite group $G$, we prove that if $i_{1} \neq i_j$ for every $j\neq 1$, then the verbal subgroup corresponding ... More
T=0 heavy fermion quantum critical point as an orbital selective Mott transitionApr 21 2008Jan 18 2009We describe the T=0 quantum phase transition in heavy fermion systems as an orbital selective Mott transition (OSMT) using a cluster extension of dynamical mean field theory. This transition is characterized by the emergence of a new intermediate energy ... More
$E_7 \subset Sp(56,R)$ irrep decompositions of interest for physical modelsDec 18 2013Mar 07 2014In this note we show how to obtain the projection matrix for the $E_7 \subset C_{28}$ chain and we tabulate some decompositions of the symplectic algebra $C_{28}$ representations into irreps of the $E_7$ subalgebra that are important for various physical ... More
Gravitational wave energy spectrum of hyperbolic encountersJul 23 2012The emission of gravitational waves is studied for a system of massive objects interacting on hyperbolic orbits within the quadrupole approximation following the work of Capozziello et al. Here we focus on the derivation of an analytic formula for the ... More
Reproducing kernel Hilbert spaces on manifolds: Sobolev and Diffusion spacesMay 27 2019We study reproducing kernel Hilbert spaces (RKHS) on a Riemannian manifold. In particular, we discuss under which condition Sobolev spaces are RKHS and characterize their reproducing kernels. Further, we introduce and discuss a class of smoother RKHS ... More
Multiple Scaled Contaminated Normal Distribution and Its Application in ClusteringOct 21 2018The multivariate contaminated normal (MCN) distribution represents a simple heavy-tailed generalization of the multivariate normal (MN) distribution to model elliptical contoured scatters in the presence of mild outliers, referred to as "bad" points. ... More
A note on Engel elements in the first Grigorchuk groupFeb 25 2018Let $\Gamma$ be the first Grigorchuk group. According to a result of Bartholdi, the only left Engel elements of $\Gamma$ are the involutions. This implies that the set of left Engel elements of $\Gamma$ is not a subgroup. Of particular interest is to ... More
Spacetime Thermodynamics with ContorsionJul 05 2018Sep 19 2018We prove that a conserved effective energy-momentum tensor for Einstein-Cartan theory can be identified from the Noether identities of the matter Lagrangian, using the torsion field equations relating them. More precisely, a one-parameter family labelled ... More
The 2015 outburst of the accretion-powered pulsar IGR J00291+5934: INTEGRAL and Swift observationsNov 24 2016Dec 06 2016IGR J00291+5934 is the fastest-known accretion-powered X-ray pulsar, discovered during a transient outburst in 2004. In this paper, we report on Integral and Swift observations during the 2015 outburst, which lasts for $\sim25$ d. The source has not been ... More
KiDS-SQuaD II: Machine learning selection of bright extragalactic objects to search for new gravitationally lensed quasarsJun 04 2019Jun 07 2019The KiDS Strongly lensed QUAsar Detection project (KiDS-SQuaD) aims at finding as many previously undiscovered gravitational lensed quasars as possible in the Kilo Degree Survey. This is the second paper of this series where we present a new, automatic ... More
From XML Schema to JSON Schema: Translation with CHRJun 09 2014Despite its rising popularity as data format especially for web services, the software ecosystem around the JavaScript Object Notation (JSON) is not as widely distributed as that of XML. For both data formats there exist schema languages to specify the ... More
Star-formation in CALIFA early-type galaxies. A matter of discsJun 25 2019The star formation main sequence (SFMS) is a tight relation between the galaxy star formation rate (SFR) and its total stellar mass ($M_\star$). Early-type galaxies (ETGs) are often considered as low-SFR outliers of this relation. We study, for the first ... More
Measurement of work in single-molecule experimentsMay 26 2009A main goal of single-molecule experiments is to evaluate equilibrium free energy differences by applying fluctuation relations to repeated work measurements along irreversible processes. We quantify the error that is made in a free energy estimate by ... More
VizRec: A framework for secure data exploration via visual representationNov 01 2018Visual representations of data (visualizations) are tools of great importance and widespread use in data analytics as they provide users visual insight to patterns in the observed data in a simple and effective way. However, since visualizations tools ... More
Differentially Private Generative Adversarial Networks for Time Series, Continuous, and Discrete Open DataJan 08 2019Mar 06 2019Open data plays a fundamental role in the 21th century by stimulating economic growth and by enabling more transparent and inclusive societies. However, it is always difficult to create new high-quality datasets with the required privacy guarantees for ... More
(In)Secure Configuration Practices of WPA2 Enterprise SupplicantsJun 08 2018WPA2 Enterprise is a fundamental technology for secure communication in enterprise wireless networks. A key requirement of this technology is that WiFi-enabled devices (i.e., supplicants) be correctly configured before connecting to the enterprise wireless ... More
Statistical analysis of probability density functions for photometric redshifts through the KiDS-ESO-DR3 galaxiesOct 23 2018Despite the high accuracy of photometric redshifts (zphot) derived using Machine Learning (ML) methods, the quantification of errors through reliable and accurate Probability Density Functions (PDFs) is still an open problem. First, because it is difficult ... More
Output Regulation for Systems on Matrix Lie-groupMar 10 2016This paper deals with the problem of output regulation for systems defined on matrix Lie-Groups. Reference trajectories to be tracked are supposed to be generated by an exosystem, defined on the same Lie-Group of the controlled system, and only partial ... More
Measurement of the slope parameter αfor the η\to 3π^0 decay at KLOEJul 27 2007We report a preliminary measurement of the slope parameter $\alpha$ for the $\eta\to 3\piz$ decay carried out with KLOE at DA$\Phi$NE; where $\alpha$ is the parameter describing the energy dependence of the square of the matrix element for this decay. ... More
Ferromagnetic Kondo Effect at NanocontactsFeb 02 2009Magnetic impurities bridging nanocontacts and break junctions of nearly magnetic metals may lead to permanent moments, analogous to the giant moments well known in the bulk case. A numerical renormalization group (NRG) study shows that, contrary to mean ... More
Distinct stellar populations in the inner bars of double-barred galaxiesFeb 22 2013Numerical simulations of double-barred galaxies predict the build-up of different structural components (e.g., bulges, inner discs) in the central regions of disc galaxies. In those simulations, inner bars have a prominent role in the internal secular ... More
General relativistic massive vector field effects in Gamma Ray Burst productionFeb 29 2016Mar 10 2016To explain the extremely high energy release, $>10^{53}$~erg, suggested by the observations of some Gamma Ray Bursts (GRBs) we propose a new energy extraction mechanism from the rotation energy of a Kerr-Newman black hole (BH) by a massive photon field. ... More
Star-formation in CALIFA early-type galaxies. A matter of discsJun 25 2019Jul 01 2019The star formation main sequence (SFMS) is a tight relation between the galaxy star formation rate (SFR) and its total stellar mass ($M_\star$). Early-type galaxies (ETGs) are often considered as low-SFR outliers of this relation. We study, for the first ... More
A generalization of 2-Baer groupsJan 13 2015Feb 03 2015A group in which all cyclic subgroups are 2-subnormal is called a 2-Baer group. The topic of this paper are generalized 2-Baer groups, i.e. groups in which the non-2-subnormal cyclic subgroups generate a proper subgroup of the group. If this subgroup ... More
Recent Advances of Isogeometric Analysis in Computational ElectromagneticsSep 18 2017In this communication the advantages and drawbacks of the isogeometric analysis (IGA) are reviewed in the context of electromagnetic simulations. IGA extends the set of polynomial basis functions, commonly employed by the classical Finite Element Method ... More
First FAMU observation of muon transfer from mu-p atoms to higher-Z elementsAug 10 2017Dec 15 2017The FAMU experiment aims to accurately measure the hyperfine splitting of the ground state of the muonic hydrogen atom. A measurement of the transfer rate of muons from hydrogen to heavier gases is necessary for this purpose. In June 2014, within a preliminary ... More
Charged kaon lifetime at KLOEMay 30 2007Jul 16 2007Preliminary result on the charged kaon lifetime, obtained by the KLOE experiment operating at DA$\Phi$NE, the Frascati $\phi$-factory, is presented
Determination of the η\toπ^+π^-π^0 Dalitz Plot slopes and asymmetries with the KLOE detectorJul 16 2007Jul 26 2007We have studied, with the KLOE detector at the DA$\Phi$NE $\Phi$-Factory, the dynamics of the decay $\eta\to\pi^+\pi^-\pi^0$ using data from the radiative $\phi\to\eta\gamma$ decay for an integrated luminosity $L = 450 \textrm{pb^{-1}}$. From a fit to ... More
Study of the process e+e- -> omega p0 with the KLOE detectorJul 27 2007May 16 2008Using ~600 pb-1 collected with the KLOE detector at DAPhiNE, we have studied the production cross section of pi+ pi- pi0 pi0 and p0p0 gamma final states in e+e- collisions at center of mass energies between 1000 and 1030 MeV. By fitting the observed interference ... More
eta Physics and phi Radiative Decays at KloeMay 23 2007May 24 2007Here we present KLOE results on the phi meson decays in pi0 pi0 gamma, pi+ pi- gamma and eta pi0 gamma, the measurement of the ratio Br(phi to eta' gamma)/Br(phi to eta gamma) with the estimate of the eta' gluonium content and the measurement of the eta ... More
Proper Generalized Decomposition for Nonlinear Convex Problems in Tensor Banach SpacesJun 22 2011Dec 01 2011Tensor-based methods are receiving a growing interest in scientific computing for the numerical solution of problems defined in high dimensional tensor product spaces. A family of methods called Proper Generalized Decompositions methods have been recently ... More
Slip Detection: Analysis and Calibration of Univariate Tactile SignalsJun 27 2018The existence of tactile afferents sensitive to slip-related mechanical transients in the human hand augments the robustness of grasping through secondary force modulation protocols. Despite this knowledge and the fact that tactile-based slip detection ... More
Groups generated by a finite Engel setSep 26 2011A subset $S$ of a group $G$ is called an Engel set if, for all $x,y\in S$, there is a non-negative integer $n=n(x,y)$ such that $[x,\,_n y]=1$. In this paper we are interested in finding conditions for a group generated by a finite Engel set to be nilpotent. ... More
An algorithm for the normal bundle of rational monomial curvesDec 22 2015We give an algorithm for calculating the splitting type of the normal bundle of any rational monomial curve. The algorithm is obtained by reducing the calculus to a combinatorial problem and then by solving this problem.
On varieties of groups satisfying an Engel type identityMar 25 2015Let m, n be positive integers, v a multilinear commutator word and w = v^m. Denote by v(G) and w(G) the verbal subgroups of a group G corresponding to v and w, respectively. We prove that the class of all groups G in which the w-values are n-Engel and ... More
An Engel condition for orderable groupsFeb 21 2014Let m,n be positive integers, v a multilinear commutator word and w=v^m. We prove that if G is an orderable group in which all w-values are n-Engel, then the verbal subgroup v(G) is locally nilpotent. We also show that in the particular case where v=x ... More
On groups with all subgroups subnormal or soluble of bounded derived lengthAug 28 2012In this paper, we deal with locally graded groups whose subgroups are either subnormal or soluble of bounded derived length, say d. In particular, we prove that every locally (soluble-by-finite) group with this property is either soluble or an extension ... More
Hodge-Gaussian mapsMay 30 2000Let $X$ be a compact K\"{a}hler manifold, and let $L$ be a line bundle on $X.$ Define $I_k(L)$ to be the kernel of the multiplication map $ Sym^k H^0 (L) \to H^0 (L^k).$ For all $h \leq k,$ we define a map $\rho : I_k(L) \to Hom (H^{p,q} (L^{-h}), H^{p+1,q-1} ... More
Analytical ray-tracing in planetary atmospheresJan 24 2019Ground-based astro-geodetic observations and atmospheric occultations, are two examples of observational techniques requiring a scrutiny analysis of atmospheric refraction. In both cases, the measured changes in observables are geometrically related to ... More
Engel groups with an identityMay 31 2018We give an affrmative answer to the question whether a residually finite Engel group satisfying an identity is locally nilpotent. More generally, for a residually finite group G with an identity, we prove that the set of right Engel elements of G is contained ... More
Reconfigurable photoinduced metamaterials in the microwave regimeSep 15 2014We investigate optically reconfigurable dielectric metamaterials at gigahertz frequencies. More precisely, we study the microwave response of a subwavelength grating optically imprinted into a semiconductor slab. In the homogenized regime, we analytically ... More
The intrinsic three-dimensional shape of galactic barsMay 24 2018Jul 05 2018We present the first statistical study on the intrinsic three-dimensional (3D) shape of a sample of 83 galactic bars extracted from the CALIFA survey. We use the galaXYZ code to derive the bar intrinsic shape with a statistical approach. The method uses ... More
Fourier domain gravitational waveforms for precessing eccentric binariesJan 25 2018Nov 28 2018We build two families of inspiral waveforms for precessing binaries on eccentric orbits in the Fourier domain. To achieve this, we use a small eccentricity expansion of the waveform amplitudes in order to separate the periastron precession timescale from ... More
Detecting continuous gravitational waves with superfluid $^4$HeJun 15 2016Direct detection of gravitational waves is opening a new window onto our universe. Here, we study the sensitivity to continuous-wave strain fields of a kg-scale optomechanical system formed by the acoustic motion of superfluid helium-4 parametrically ... More
A discrete chemo-dynamical model of the dwarf spheroidal galaxy Sculptor: mass profile, velocity anisotropy and internal rotationAug 29 2016We present a new discrete chemo-dynamical axisymmetric modeling technique, which we apply to the dwarf spheroidal galaxy Sculptor. The major improvement over previous Jeans models is that realistic chemical distributions are included directly in the dynamical ... More
Quantum effects in muon spin spectroscopy within the stochastic self-consistent harmonic approximationApr 26 2019In muon spin rotation experiments the positive implanted muon vibrates with large zero point amplitude by virtue of its light mass. Quantum mechanical calculations of the host material usually treat the muon as a point impurity, ignoring this large vibrational ... More
Controlling False Discoveries During Interactive Data ExplorationDec 04 2016Recent tools for interactive data exploration significantly increase the chance that users make false discoveries. The crux is that these tools implicitly allow the user to test a large body of different hypotheses with just a few clicks thus incurring ... More
AI Pipeline - bringing AI to you. End-to-end integration of data, algorithms and deployment toolsJan 15 2019Next generation of embedded Information and Communication Technology (ICT) systems are interconnected collaborative intelligent systems able to perform autonomous tasks. Training and deployment of such systems on Edge devices however require a fine-grained ... More
Model-independent limits and constraints on extended theories of gravity from cosmic reconstruction techniquesAug 12 2016Dec 18 2016The onset of dark energy domination depends on the particular gravitational theory driving the cosmic evolution. Model independent techniques are crucial to test both the present $\Lambda$CDM cosmological paradigm and alternative theories, making the ... More
The Age-Mass-Metallicity-Activity relation of solar-type stars: Comparisons with asteroseismology and the NGC 188 open clusterSep 25 2016The Mount Wilson Ca II index log$(R'_{\rm HK})$ is the accepted standard metric of calibration for the chromospheric activity versus age relation of FGK stars. Recent results claim its inability to discern activity levels, and thus ages, for stars older ... More
Updated properties of the old open cluster Melotte 66: Searching for multiple stellar populationsApr 27 2014Multiple generations of stars are routinely encountered in globular clusters but no convincing evidence has been found in Galactic open clusters to date. In this paper we use new photometric and spectroscopic data to search for multiple stellar population ... More
Post-transcriptional Regulation Drives Temporal Compartmentalization of the Yeast Metabolic CycleJul 25 2007The maintainance of a stable periodicity during the yeast metabolic cycle involving approximately half of the genome requires a very strict and efficient control of gene expression. For this reason, the metabolic cycle is a very good candidate for testing ... More
Achieving Vanishing Rate Loss in Decentralized Network MIMOJan 21 2019Apr 30 2019In this paper, we analyze a Network MIMO channel with 2 Transmitters (TXs) jointly serving 2 users, where each TX has a different multi-user Channel State Information (CSI), potentially with a different accuracy. Recently it was shown the surprising result ... More
The tilt of the velocity ellipsoid in the Milky Way with Gaia DR2Feb 14 2019The velocity distribution of stars is a sensitive probe of the gravitational potential of the Galaxy, and hence of its dark matter distribution. In particular, the shape of the dark halo (e.g. spherical, oblate, prolate) determines velocity correlations, ... More
Non-trivial fixed point in a twofold orbitally degenerate Anderson impurity modelMay 14 2003Jan 28 2004We study the phase diagram of a twofold orbitally degenerate Anderson impurity model which presents a non-trivial fixed point similar to the two-impurity Kondo model one. Remarkably, this fixed point is more robust than the latter one, since it can only ... More
Thermodynamics of the three-dimensional Hubbard model: Implications for cooling cold atomic gases in optical latticesSep 14 2010Aug 08 2011We present a comprehensive study of the thermodynamic properties of the three-dimensional fermionic Hubbard model, with application to cold fermionic atoms subject to an optical lattice and a trapping potential. Our study is focused on the temperature ... More
Monte Carlo wavelets: a randomized approach to frame discretizationMar 15 2019In this paper we propose and study a family of continuous wavelets on general domains, and a corresponding stochastic discretization that we call Monte Carlo wavelets. First, using tools from the theory of reproducing kernel Hilbert spaces and associated ... More
Classical and general relativistic post-Keplerian effects in binary pulsars hosting fast rotating main sequence starsMay 14 2019We consider a binary system composed of a pulsar and a massive, fast rotating, highly distorted main sequence star as a potential scenario to dynamically put to the test certain post-Keplerian effects of both Newtonian and post-Newtonian nature. We numerically ... More
Improving signal-to-noise resolution in single molecule experiments using molecular constructs with short handlesMay 24 2011We investigate unfolding/folding force kinetics in DNA hairpins exhibiting two and three states with newly designed short dsDNA handles (29 bp) using optical tweezers. We show how the higher stiffness of the molecular setup moderately enhances the signal-to-noise ... More
Orthogonal vertical velocity dispersion distributions produced by barsNov 20 2016Feb 16 2017In barred galaxies, the contours of stellar velocity dispersions ($\sigma$) are generally expected to be oval and aligned with the orientation of bars. However, many double-barred (S2B) galaxies exhibit distinct $\sigma$ peaks on the minor axis of inner ... More
Theory of Weak Hypernuclear DecayJun 04 1996The weak nonmesonic decay of Lambda-hypernuclei is studied in the context of a one-meson-exchange model. Predictions are made for the decay rate, p/n stimulation ratio and the asymmetry in polarized hypernuclear decay.
Fine structure of the age-chromospheric activity relation in solar-type stars I: The Ca II infrared triplet: Absolute flux calibrationAug 08 2016Strong spectral lines are useful indicators of stellar chromospheric activity. They are physically linked to the convection efficiency, differential rotation, and angular momentum evolution and are a potential indicator of age. However, for ages > 2 Gyr, ... More
A study for Image compression using Re-Pair algorithmJan 30 2019Feb 13 2019The compression is an important topic in computer science which allows we to storage more amount of data on our data storage. There are several techniques to compress any file. In this manuscript will be described the most important algorithm to compress ... More
Towards Least Privilege Containers with CimplifierFeb 26 2016Application containers, such as Docker containers, have recently gained popularity as a solution for agile and seamless deployment of applications. These light-weight virtualization environments run applications that are packed together with their resources ... More
The age-mass-metallicity-activity relation for solar-type stars: Comparisons with asteroseismology and the NGC 188 open clusterSep 25 2016Oct 03 2016The Mount Wilson Ca II index log$(R'_{\rm HK})$ is the accepted standard metric of calibration for the chromospheric activity versus age relation of FGK stars. Recent results claim its inability to discern activity levels, and thus ages, for stars older ... More
Getting into Shape: Efficient Cooling Scheme for Fermionic Atoms in Optical LatticesFeb 02 2009Jun 09 2009We propose an experimental procedure to cool fermionic atoms loaded into an optical lattice. The central idea is to spatially divide the system into entropy-rich and -poor regions by shaping the confining potential profile. Atoms in regions of high entropy ... More
Single-molecule stochastic resonanceDec 11 2012Stochastic resonance (SR) is a well known phenomenon in dynamical systems. It consists of the amplification and optimization of the response of a system assisted by stochastic noise. Here we carry out the first experimental study of SR in single DNA hairpins ... More