Results for "Daniel Roberto Cassar"

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Solving the Classical Nucleation Theory with respect to the surface energyDec 15 2018A critical parameter of the Classical Nucleation Theory is the surface energy $\sigma$ between the nucleus and the ambient phase. Unfortunately, this parameter cannot be measured experimentally for crystal nucleation in condensed matter. A typical practice ... More
Solving the Classical Nucleation Theory with respect to the surface energyDec 15 2018Mar 11 2019An essential parameter of the Classical Nucleation Theory (CNT) is the surface energy between a critical-size nucleus and the ambient phase, $\sigma$. In condensed matter, this parameter cannot be experimentally determined independently of CNT. A common ... More
The failure of the Classical Nucleation Theory at low temperatures resolvedFeb 08 2019A relevant observation about crystal nucleation kinetics in glass-forming substances has been a matter of intense debate for several decades. The Classical Nucleation Theory (CNT) allegedly fails to describe the temperature dependence of the homogeneous ... More
Fricke S-duality in CHL modelsApr 27 2015Sep 02 2015We consider four dimensional CHL models with sixteen spacetime supersymmetries obtained from orbifolds of type IIA superstring on K3 x T^2 by a Z_N symmetry acting (possibly) non-geometrically on K3. We show that most of these models (in particular, for ... More
Langevin dynamics of fluctuation induced first order phase transitions: self consistent Hartree ApproximationJul 07 2006The Langevin dynamics of a system exhibiting a Fluctuation Induced First Order Phase Transition is solved within the self consistent Hartree Approximation. Competition between interactions at short and long length scales gives rise to spatial modulations ... More
Gradient algorithms for finding common Lyapunov functionsJun 18 2002This paper is concerned with the problem of finding a quadratic common Lyapunov function for a family of stable linear systems. We present gradient iteration algorithms which give deterministic convergence for finite system families and probabilistic ... More
Fricke S-duality in CHL modelsApr 27 2015Nov 21 2016We consider four dimensional CHL models with sixteen spacetime supersymmetries obtained from orbifolds of type IIA superstring on K3 x T^2 by a Z_N symmetry acting (possibly) non-geometrically on K3. We show that most of these models (in particular, for ... More
The luminosity function of galaxies to $M_{BgVriz} \sim -14$ in $z \sim 0.3$ clustersOct 23 2008We present deep composite luminosity functions in $B$, $g$, $V$, $r$, $i$ and $z$ for six clusters at $0.14 < z < 0.40$ observed with the Hubble Space Telescope Advanced Camera for Surveys. The luminosity functions reach to absolute magnitude of $\sim ... More
The evolution of cluster dwarfsAug 20 2009We summarize the results from analyzing six clusters of galaxies at 0.14 < z < 0.40 observed with the Hubble Space Telescope Advanced Camera for Surveys. We derive deep composite luminosity functions in B,g,V,r,i and z down to an absolute magnitude of ... More
The cluster galaxy luminosity function at $z=0.3$: a recent origin for the faint-end upturn ?Jun 20 2007We derive deep luminosity functions (to $M_z=-15$) for galaxies in Abell 1835 ($z=0.25$) and AC 114 ($z=0.31$) and compare these with the local $z'$ luminosity function for 69 clusters. The data show that the faint-end upturn, the excess of galaxies above ... More
The Virtual Diphoton ExcessJan 08 2016Jan 26 2016Interpreting the excesses around 750 GeV in the diphoton spectra to be the signal of a new heavy scalar decaying to photons, we point out the possibility of looking for correlated signals with virtual photons. In particular, we emphasize that the effective ... More
Generative Models For Deep Learning with Very Scarce DataMar 21 2019The goal of this paper is to deal with a data scarcity scenario where deep learning techniques use to fail. We compare the use of two well established techniques, Restricted Boltzmann Machines and Variational Auto-encoders, as generative models in order ... More
Dark Matter Searches: The Nightmare ScenarioJul 28 2011Jan 04 2012The unfortunate case where the Large Hadron Collider (LHC) fails to discover physics Beyond the Standard Model (BSM) is sometimes referred to as the "Nightmare scenario" of particle physics. We study the consequences of this hypothetical scenario for ... More
Developing Theoretical Foundations for Runtime EnforcementApr 24 2018Nov 12 2018The ubiquitous reliance on software systems increases the need for ensuring that systems behave correctly and are well protected against security risks. Runtime enforcement is a dynamic analysis technique that utilizes software monitors to check the runtime ... More
Golden Probe of the Top YukuwaMay 05 2015May 18 2015We perform a preliminary study of the ability of the Higgs decay to four leptons to shed light on the top quark Yukawa couplings. In particular we examine whether the $h\to 4\ell$ `golden channel' is sensitive to the $CP$ properties of the top quark couplings ... More
Controlling self-organized criticality in complex networksMay 28 2013A control scheme to reduce the size of avalanches of the Bak-Tang-Wiesenfeld model on complex networks is proposed. Three network types are considered: those proposed by Erd\H{o}s-Renyi, Goh-Kahng-Kim, and a real network representing the main connections ... More
Parallel-in-Space-and-Time Simulation of the Three-Dimensional, Unsteady Navier-Stokes Equations for Incompressible FlowMay 17 2017In this paper we combine the Parareal parallel-in-time method together with spatial parallelization and investigate this space-time parallel scheme by means of solving the three-dimensional incompressible Navier-Stokes equations. Parallelization of time ... More
Jacob's Ladder: Prime numbers in 2dDec 19 2017Jul 07 2018Prime numbers are one of the most intriguing figures in mathematics. Despite centuries of research, many questions remain still unsolved. In recent years, computer simulations are playing a fundamental role in the study of an immense variety of problems. ... More
Universal Deformation Rings and Quivers of Finite Representation TypeApr 03 2016Let k be a field of arbitrary characteristic and let Q be a quiver of finite representation type. In this paper we prove that if M is an indecomposable kQ-module then the universal deformation ring of M over kQ is isomorphic to k.
A mean-field limit for certain deep neural networksJun 01 2019Understanding deep neural networks (DNNs) is a key challenge in the theory of machine learning, with potential applications to the many fields where DNNs have been successfully used. This article presents a scaling limit for a DNN being trained by stochastic ... More
Golden Probe of the Top YukawaDec 24 2015We describe how the Higgs decay to four leptons can be used to probe the nature and $CP$ structure of the top Yukawa coupling.
Generalised Moonshine and Holomorphic OrbifoldsFeb 21 2013Generalised moonshine is reviewed from the point of view of holomorphic orbifolds, putting special emphasis on the role of the third cohomology group H^3(G, U(1)) in characterising consistent constructions. These ideas are then applied to the case of ... More
Controlling self-organized criticality in sandpile modelsMay 28 2013We introduce an external control to reduce the size of avalanches in some sandpile models exhibiting self organized criticality. This rather intuitive approach seems to be missing in the vast literature on such systems. The control action, which amounts ... More
A dynamical programming approach for controlling the directed abelian Dhar-Ramaswamy modelMay 29 2013A dynamical programming approach is used to deal with the problem of controlling the directed abelian Dhar-Ramaswamy model on two-dimensional square lattice. Two strategies are considered to obtain explicit results to this task. First, the optimal solution ... More
Scale-dependent Planck mass and Higgs VEV from holography and functional renormalizationSep 14 2011We compute the scale-dependence of the Planck mass and of the vacuum expectation value of the Higgs field using two very different renormalization group methods: a "holographic" procedure based on Einstein's equations in five dimensions with matter confined ... More
Monstrous BPS-Algebras and the Superstring Origin of MoonshineJan 20 2016Jun 06 2016We provide a physics derivation of Monstrous moonshine. We show that the McKay-Thompson series $T_g$, $g\in \mathbb{M}$, can be interpreted as supersymmetric indices counting spacetime BPS-states in certain heterotic string models. The invariance groups ... More
Quantum Noise Limits for Nonlinear, Phase-Invariant AmplifiersJul 03 1994Any quantum device that amplifies coherent states of a field while preserving their phase generates noise. A nonlinear, phase-invariant amplifier may generate less noise, over a range of input field strengths, than any linear amplifier with the same amplification. ... More
On the residues vectors of a rational class of complex functions. Application to autoregressive processesJul 12 2019Complex functions have multiple uses in various fields of study, so analyze their characteristics it is of extensive interest to other sciences. This work begins with a particular class of rational functions of a complex variable; over this is deduced ... More
Mott transition in lattice boson modelsSep 26 2005Jan 19 2006We use mathematically rigorous perturbation theory to study the transition between the Mott insulator and the conjectured Bose-Einstein condensate in a hard-core Bose-Hubbard model. The critical line is established to lowest order in the tunneling amplitude. ... More
On Runtime Enforcement via SuppressionsJul 03 2018Runtime enforcement is a dynamic analysis technique that uses monitors to enforce the behaviour specified by some correctness property on an executing system. The enforceability of a logic captures the extent to which the properties expressible via the ... More
A Survey of Runtime Monitoring Instrumentation TechniquesAug 24 2017Runtime Monitoring is a lightweight and dynamic verification technique that involves observing the internal operations of a software system and/or its interactions with other external entities, with the aim of determining whether the system satisfies ... More
Performance vs complexity trade-offs for Markovian networked jump estimatorsMar 20 2014This paper addresses the design of a state observer for networked systems with random delays and dropouts. The model of plant and network covers the cases of multiple sensors, out-of-sequence and buffered measurements. The measurement outcomes over a ... More
The isotope-effect in the phase transition of KDP: New insights from ab initio path-integral simulationsFeb 07 2010We investigate the quantum-mechanical localization of protonated and deterated isotopes in the symmetric low-barrier hydrogen-bonds of potassium dihydrogen phosphate (KDP) crystals in the paraelectric phase. The spatial density distributions of these ... More
Comprehensive rate coefficients for electron collision induced transitions in hydrogenOct 18 2013Energy-changing electron-hydrogen atom collisions are crucial to regulating the energy balance in astrophysical and laboratory plasmas and relevant to the formation of stellar atmospheres, recombination in H-II clouds, primordial recombination, three-body ... More
Large D gravity and low D stringsMar 08 2013Mar 20 2013We point out that in the limit of large number of dimensions a wide class of non-extremal neutral black holes has a universal near horizon limit. The limiting geometry is the two-dimensional black hole of string theory with a two-dimensional target space. ... More
BPS Algebras, Genus Zero, and the Heterotic MonsterJan 18 2017In this note, we expand on some technical issues raised in \cite{PPV} by the authors, as well as providing a friendly introduction to and summary of our previous work. We construct a set of heterotic string compactifications to 0+1 dimensions intimately ... More
Lattice formulation of axion inflation. Application to preheatingDec 07 2018We present a lattice formulation of an interaction ${\phi\over\Lambda} F\tilde F$ between an axion and some $U(1)$ gauge sector with the following properties: it reproduces the continuum theory up to $\mathcal{O}(dx_\mu^2)$ corrections, it preserves exact ... More
On the Early Evolution of Young StarburstsMar 03 2009We studied the radio properties of very young massive regions of star formation in HII galaxies, with the aim of detecting episodes of recent star formation in an early phase of evolution where the first supernovae start to appear. The observed radio ... More
How old are the HII Galaxies?Nov 24 2003Using a novel approach we have reanalized the question of whether the extreme star forming galaxies known as HII galaxies are truly young or rejuvenated old systems. We first present a method of inversion that applies to any monotonic function of time ... More
Emission Line Properties of Seyfert 2 NucleiOct 26 2005Nov 16 2005We present a study of the global properties of Joguet's sample of 65 Seyfert 2 galaxies. We use the population synthesis models of our Paper II to derive `pure' emission-line spectra, and thus explore the statistical properties of the nuclear nebular ... More
Starspots and spin-orbit alignment for Kepler cool host starsNov 08 2012The angle between the spin axis of the host star and the orbit of its planets (i.e., the stellar obliquity) is precious information about the formation and evolution of exoplanetary systems. Measurements of the Rossiter-McLaughlin effect revealed that ... More
Learning Short-Cut Connections for Object CountingMay 08 2018Nov 15 2018Object counting is an important task in computer vision due to its growing demand in applications such as traffic monitoring or surveillance. In this paper, we consider object counting as a learning problem of a joint feature extraction and pixel-wise ... More
Interpretations of Quantum Theory in the Light of Modern CosmologyDec 24 2014The difficult issues related to the interpretation of quantum mechanics and, in particular, the "measurement problem" are revisited using as motivation the process of generation of structure from quantum fluctuations in inflationary cosmology. The unessential ... More
Study of the one-dimensional off-lattice hot-monomer reaction modelMay 04 1999Oct 21 1999Hot monomers are particles having a transient mobility (a ballistic flight) prior to being definitely absorbed on a surface. After arriving at a surface, the excess energy coming from the kinetic energy in the gas phase is dissipated through degrees of ... More
Mapping dynamical systems onto complex networksOct 30 2006Apr 24 2007A procedure to characterize chaotic dynamical systems with concepts of complex networks is pursued, in which a dynamical system is mapped onto a network. The nodes represent the regions of space visited by the system, while edges represent the transitions ... More
Simulating Organogenesis in COMSOL: Phase-Field Based Simulations of Embryonic Lung Branching MorphogenesisOct 28 2016Organogenesis has been studied for decades, but fundamental questions regarding the control of growth and shape remain unsolved. We have recently shown that of all proposed mathematical models only ligand-receptor based Turing models successfully reproduce ... More
Answering Visual-Relational Queries in Web-Extracted Knowledge GraphsSep 07 2017May 03 2019A visual-relational knowledge graph (KG) is a multi-relational graph whose entities are associated with images. We explore novel machine learning approaches for answering visual-relational queries in web-extracted knowledge graphs. To this end, we have ... More
Fusion of Head and Full-Body Detectors for Multi-Object TrackingMay 23 2017Apr 24 2018In order to track all persons in a scene, the tracking-by-detection paradigm has proven to be a very effective approach. Yet, relying solely on a single detector is also a major limitation, as useful image information might be ignored. Consequently, this ... More
Generalised Mathieu MoonshineNov 29 2012Jan 16 2014The Mathieu twisted twining genera, i.e. the analogues of Norton's generalised Moonshine functions, are constructed for the elliptic genus of K3. It is shown that they satisfy the expected consistency conditions, and that their behaviour under modular ... More
Starvation as the primary quenching mechanism in galaxiesNov 22 2018Star-forming galaxies can in principle be transformed into passive systems by a multitude of processes that quench star formation, such as the halting of gas accretion or the rapid removal of gas in AGN-driven outflows. However, it remains unclear which ... More
Multiwavelength Study of X-ray Selected Star Forming Galaxies within the Chandra Deep Field SouthMay 09 2007We have combined multi-wavelength observations of a selected sample of starforming galaxies with galaxy evolution models in order to compare the results obtained for different SFR tracers and to study the effect that the evolution of the starforming regions ... More
Transition to ultimate Rayleigh-Bénard turbulence revealed through extended self similarity scaling analysis of the temperature structure functionsMay 01 2018In turbulent Rayleigh-B\'{e}nard (RB) convection, a transition to the so-called ultimate regime, in which the boundary layers (BL) are of turbulent type, has been postulated. Indeed, at very large Rayleigh number $Ra \approx 10^{13}-10^{14}$ a transition ... More
Extending Common Envelope Simulations from Roche Lobe Overflow to the Nebular PhaseSep 07 2018We have simulated a common envelope interaction of a 0.88-M$_{\odot}$, 90-R$_{\odot}$, red giant branch star and a 0.6-M$_{\odot}$, compact companion with the smoothed particle hydrodynamics code, Phantom, from the beginning of the Roche lobe overflow ... More
Non-Unitary Neutrino Propagation From Neutrino DecayJul 24 2014Feb 12 2015Neutrino propagation in space-time is not constrained to be unitary if very light states - lighter than the active neutrinos - exist into which neutrinos may decay. If this is the case, neutrino flavor-change is governed by a handful of extra mixing and ... More
Deep Anomaly Detection for Generalized Face Anti-SpoofingApr 17 2019Face recognition has achieved unprecedented results, surpassing human capabilities in certain scenarios. However, these automatic solutions are not ready for production because they can be easily fooled by simple identity impersonation attacks. And although ... More
The evolution of superbubbles and the detection of Lyman alpha in star-forming galaxiesMay 25 1999The detection of Ly alpha emission in star-forming galaxies in different shapes and intensities (always smaller than predicted for case B recombination) has puzzled the astronomical community for more than a decade. Here we use two dimensional calculations ... More
Symmetry breaking in frustrated systems: effective fluctuation spectrum due to coupling effectsDec 28 2010We study the Langevin dynamics of a d-dimensional Ginzburg-Landau Hamiltonian with isotropic long range repulsive interactions. We show that, once the symmetry is broken, there is a coupling between the mean value of the local field and its fluctuations, ... More
Building your path to escape from homeSep 29 2017Random walks on dynamic graphs have received increasingly more attention over the last decade from different academic communities. Despite the relatively large literature very little is known about random walks that construct the graph where they walk ... More
Diagrammatic Coupled Cluster Monte CarloJan 09 2019Feb 05 2019We propose a modified coupled cluster Monte Carlo algorithm that stochastically samples connected terms within the truncated Baker--Campbell--Hausdorff expansion of the similarity transformed Hamiltonian by construction of coupled cluster diagrams on ... More
A Bayesian Analysis of the Constrained NMSSMJun 26 2009We perform a first global exploration of the Constrained Next-to-Minimal Supersymmetric Standard Model using Bayesian statistics. We derive several global features of the model and find that, in some contrast to initial expectations, they closely resemble ... More
Hunting physics beyond the standard model with unusual $W^\pm$ and $Z$ decaysMar 14 2014Feb 18 2015Nonstandard on-shell decays of $W^\pm$ and $Z$ bosons are possible within the framework of extended supersymmetric models, i.e., with singlet states and/or new couplings compared to the minimal supersymmetric standard model. These modes are typically ... More
Diagrammatic Coupled Cluster Monte CarloJan 09 2019Feb 09 2019We propose a modified coupled cluster Monte Carlo algorithm that stochastically samples connected terms within the truncated Baker--Campbell--Hausdorff expansion of the similarity transformed Hamiltonian by construction of coupled cluster diagrams on ... More
Looking for the left sneutrino LSP with displaced-vertex searchesMar 30 2018Oct 01 2018We analyze a displaced dilepton signal expected at the LHC for a tau left sneutrino as the lightest supersymmetric particle with a mass in the range $45$-$100$ GeV. The sneutrinos are pair produced via a virtual $W$, $Z$ or $\gamma$ in the $s$ channel ... More
Cluster formation and self-assembly in stratified fluids: a novel mechanism for particulate aggregationMay 18 2019An extremely broad and important class of phenomena in nature involves the settling and aggregation of matter under gravitation in fluid systems. Some examples include: sedimenting marine snow particles in lakes and oceans (central to carbon sequestration), ... More
Is light neutralino as dark matter still viable?Jul 08 2011Motivated by the recent re-confirmation by CoGENT of the low-energy excess of events observed last year, and the recent improved limits from the XENON-100 experiment that are in contention with the CoGENT data, we re-examine the low mass neutralino region ... More
Learning Power Spectrum Maps from Quantized Power MeasurementsJun 07 2016Using power measurements collected by a network of low-cost sensors, power spectral density (PSD) maps are constructed to capture the distribution of RF power across space and frequency. Linearly compressed and quantized power measurements enable wideband ... More
A Multi-Wavelength Study of Low Redshift Clusters of Galaxies I. Comparison of X-ray and Mid-Infrared Selected AGNsJan 04 2011Clusters of galaxies have long been used as laboratories for the study of galaxy evolution, but despite intense, recent interest in feedback between AGNs and their hosts, the impact of environment on these relationships remains poorly constrained. We ... More
Mapping of focused Laguerre-Gauss beams: The interplay between spin and orbital angular momentum and its dependence on detector characteristicsApr 19 2012We show that propagating optical fields bearing an axial symmetry are not truly hollow in spite of a null electric field on-axis. The result, obtained by general arguments based upon the vectorial nature of electromagnetic fields, is of particular significance ... More
Analysis of the parameter space and spectrum of the $μν$SSMOct 08 2008Dec 04 2008The $\mu\nu$SSM is a supersymmetric standard model that solves the $\mu$ problem of the MSSM using the R-parity breaking couplings between the right-handed neutrino superfields and the Higgses in the superpotential, $\lambda_{i} \hat \nu^c_i \hat H_d ... More
Searching for left sneutrino LSP at the LHCJul 08 2017Jun 18 2018We analyze relevant signals expected at the LHC for a left sneutrino as the lightest supersymmetric particle (LSP). The discussion is carried out in the `$\mu$ from $\nu$' supersymmetric standard model ($\mu \nu$SSM), where the presence of $R$-parity ... More
Probing the "$μ$ from $ν$" supersymmetric standard model with displaced multileptons from the decay of a Higgs boson at the LHCNov 14 2012Jun 17 2013The "$\mu$ from $\nu$" supersymmetric standard model ($\mu\nu$SSM) cures the $\mu$-problem and concurrently reproduces measured neutrino data by using a set of usual right-handed neutrino superfields. Recently, the LHC has revealed the first scalar boson ... More
TransRev: Modeling Reviews as Translations from Users to ItemsJan 30 2018Apr 18 2018The text of a review expresses the sentiment a customer has towards a particular product. This is exploited in sentiment analysis where machine learning models are used to predict the review score from the text of the review. Furthermore, the products ... More
Interpretable Deep Learning Model for the Detection and Reconstruction of Dysarthric SpeechJul 10 2019This paper proposed a novel approach for the detection and reconstruction of dysarthric speech. The encoder-decoder model factorizes speech into a low-dimensional latent space and encoding of the input text. We showed that the latent space conveys interpretable ... More
Learning Flexible and Reusable Locomotion Primitives for a MicrorobotMar 01 2018The design of gaits for robot locomotion can be a daunting process which requires significant expert knowledge and engineering. This process is even more challenging for robots that do not have an accurate physical model, such as compliant or micro-scale ... More
Optical/Near-IR spatially resolved study of the H II galaxy Tol 02Jul 21 2017The main goal of this study is to characterise the stellar populations in very low metallicity galaxies. We have obtained broad U, B, R, I, J, H, K, intermediate Str\"omgren y and narrow H{\alpha} and [OIII] deep images of the Wolf-Rayet, Blue Compact ... More
The challenge of simultaneous object detection and pose estimation: a comparative studyJan 24 2018Detecting objects and estimating their pose remains as one of the major challenges of the computer vision research community. There exists a compromise between localizing the objects and estimating their viewpoints. The detector ideally needs to be view-invariant, ... More
The Higgs sector of the munuSSM and collider physicsJul 22 2011Oct 06 2011The $\mu\nu$SSM is a supersymmetric standard model that accounts for light neutrino masses and solves the $\mu$ problem of the MSSM by simply using right-handed neutrino superfields. Since this mechanism breaks R-parity, a peculiar structure for the mass ... More
Dynamics of systems with isotropic competing interactions in an external field: a Langevin approachNov 23 2010We study the Langevin dynamics of a ferromagnetic Ginzburg-Landau Hamiltonian with a competing long-range repulsive term in the presence of an external magnetic field. The model is analytically solved within the self consistent Hartree approximation for ... More
Golden Probe of Electroweak Symmetry BreakingAug 06 2016The ratio of the Higgs couplings to $WW$ and $ZZ$ pairs, $\lambda_{WZ}$, is a fundamental parameter in electroweak symmetry breaking as well as a measure of the (approximate) custodial symmetry possessed by the gauge boson mass matrix. We show that Higgs ... More
Next-to-Minimal Supersymmetric Model Higgs Scenarios for Partially Universal GUT Scale Boundary ConditionsMay 06 2011Aug 23 2011We examine the extent to which it is possible to realize the NMSSM "ideal Higgs" models espoused in several papers by Gunion et al in the context of partially universal GUT scale boundary conditions. To this end we use the powerful methodology of nested ... More
Gamma-ray detection from gravitino dark matter decay in the $μν$SSMJun 19 2009Feb 25 2010The $\mu\nu$SSM provides a solution to the $\mu$-problem of the MSSM and explains the origin of neutrino masses by simply using right-handed neutrino superfields. Given that R-parity is broken in this model, the gravitino is a natural candidate for dark ... More
Clustering and descendants of MUSYC galaxies at z<1.5Jun 29 2010Jul 07 2010We measure the evolution of galaxy clustering out to a redshift of z~1.5 using data from two MUSYC fields, the Extended Hubble Deep Field South (EHDF-S) and the Extended Chandra Deep Field South (ECDF-S). We use photometric redshift information to calculate ... More
Direct numerical simulations of Taylor--Couette turbulence: the effect of sand grain roughnessDec 05 2018Progress in roughness research, mapping any given roughness geometry to its fluid dynamic behaviour, has been hampered by the lack of accurate and direct measurements of skin-friction drag, especially in open systems. The Taylor--Couette (TC) system has ... More
Building your path to escape from homeSep 29 2017Feb 02 2019Random walks on dynamic graphs have received increasingly more attention from different academic communities over the last decade. Despite the relatively large literature, little is known about random walks that construct the graph where they walk while ... More
A new near-IR window of low extinction in the Galactic planeApr 20 2018The windows of low extinction in the Milky Way (MW) plane are rare but important because they enable us to place structural constraints on the opposite side of the Galaxy, which has hitherto been done rarely. We use the near-infrared (near-IR) images ... More
An Ontology-based Approach to Explaining Artificial Neural NetworksJun 19 2019Explainability in Artificial Intelligence has been revived as a topic of active research by the need of conveying safety and trust to users in the `how' and `why' of automated decision-making. Whilst a plethora of approaches have been developed for post-hoc ... More
Topology classification with deep learning to improve real-time event selection at the LHCJun 29 2018Aug 01 2018We show how event topology classification based on deep learning could be used to improve the purity of data samples selected in real time at at the Large Hadron Collider. We consider different data representations, on which different kinds of multi-class ... More
Extinction in the Star Cluster SAI~113 and Galactic Structure in CarinaJan 28 2017Photometric CCD {\it UBVI}$_C$ photometry obtained for 4860 stars surrounding the embedded southern cluster SAI~113 (Skiff~8) is used to examine the reddening in the field and derive the distance to the cluster and nearby van~Genderen~1. Spectroscopic ... More
Towards whole program generation of quadrature-free discontinuous Galerkin methods for the shallow water equationsApr 18 2019The shallow water equations (SWE) are a commonly used model to study tsunamis, tides, and coastal ocean circulation. However, there exist various approaches to discretize and solve them efficiently. Which of them is best for a certain scenario is often ... More
Low Level Control of a Quadrotor with Deep Model-Based Reinforcement LearningJan 11 2019Jul 19 2019Designing effective low-level robot controllers often entail platform-specific implementations that require manual heuristic parameter tuning, significant system knowledge, or long design times. With the rising number of robotic and mechatronic systems ... More
VLT Spectroscopy of Globular Cluster Systems, II. Spectroscopic Ages, Metallicities, and [alpha/Fe] Ratios of Globular Clusters in Early-Type GalaxiesMay 20 2005An analysis of ages, metallicities, and [alpha/Fe] ratios of globular cluster systems in early-type galaxies is presented, based on Lick index measurements summarized in Puzia et al. (2004, Paper I of this series). In the light of calibration and measurement ... More
The compact, ~1 kpc host galaxy of a quasar at z=7.1Feb 13 2017We present ALMA observations of the [CII] fine structure line and the underlying far-infrared (FIR) dust continuum emission in J1120+0641, the most distant quasar currently known (z=7.1). We also present observations targeting the CO(2-1), CO(7-6) and ... More
On the solutions of the Cartan equation in Metric Affine GravitySep 28 2000In the Tucker-Wang approach to Metric Affine gravity we review some particular solutions of the Cartan equation for the non-riemannian part of the connection. As application we show how a quite general non Riemannian model gives a Proca type equation ... More
Non-Invariant Ground States, Thermal Average, and generalized Fermionic StatisticsOct 11 1999Nov 09 1999We present an approach to generalised fermionic statistics which relates the existence of a generalised statistical behaviour to non-invariant ground states. Considering the thermal average of an operatorial generalization of the Heisenberg algebra, we ... More
The Prabhakar or three parameter Mittag--Leffler function: theory and applicationAug 24 2017Oct 11 2017The Prabhakar function (namely, a three parameter Mittag-Leffler function) is investigated. This function plays a fundamental role in the description of the anomalous dielectric properties in disordered materials and heterogeneous systems manifesting ... More
Unveiling the Radiative Local Density of Optical States of a Plasmonic Nanocavity by STM Luminescence and SpectroscopyJul 18 2019Disentangling the contributions of radiative and non-radiative localized plasmonic modes from the photonic density of states of metallic nanocavities between atomically-sharp tips and flat substrates remains an experimental challenge nowadays. Electroluminescence ... More
Hydrodynamic Simulations of the Interaction between an AGB Star and a Main Sequence Companion in Eccentric OrbitsOct 28 2015The Rotten Egg Nebula has at its core a binary composed of a Mira star and an A-type companion at a separation >10 au. It has been hypothesized to have formed by strong binary interactions between the Mira and a companion in an eccentric orbit during ... More
Sampling the $μν$SSM for displaced decays of the tau left sneutrino LSP at the LHCJul 03 2019Within the framework of the $\mu\nu$SSM, a displaced dilepton signal is expected at the LHC from the decay of a tau left sneutrino as the lightest supersymmetric particle (LSP) with a mass in the range $45 - 100$ GeV. We compare the predictions of this ... More
Integral field spectroscopy of HII regions in M33Dec 28 2012Integral field spectroscopy (IFS) is presented for star forming regions in M33. A central area of 300 x 500 pc^2 and the external HII region IC 132, at a galactocentric distance {\sim} 19arcmin (4.69 kpc) were observed with the Potsdam Multi Aperture ... More
Sampling the $μν$SSM for displaced decays of the tau left sneutrino LSP at the LHCJul 03 2019Jul 23 2019Within the framework of the $\mu\nu$SSM, a displaced dilepton signal is expected at the LHC from the decay of a tau left sneutrino as the lightest supersymmetric particle (LSP) with a mass in the range $45 - 100$ GeV. We compare the predictions of this ... More