Results for "J. Cabrera"

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On the stability of the positive mass theorem for asymptotically hyperbolic graphsMar 05 2018The positive mass theorem states that the total mass of a complete asymptotically flat manifold with non-negative scalar curvature is non-negative; moreover, the total mass equals zero if and only if the manifold is isometric to the Euclidean space. Huang ... More
Unsupervised learning from videos using temporal coherency deep networksJan 24 2018Oct 11 2018In this work we address the challenging problem of unsupervised learning from videos. Existing methods utilize the spatio-temporal continuity in contiguous video frames as regularization for the learning process. Typically, this temporal coherence of ... More
A survey on extensions of Riemannian manifolds and Bartnik mass estimatesApr 11 2019Mantoulidis and Schoen developed a novel technique to handcraft asymptotically flat extensions of Riemannian manifolds $(\Sigma \cong \mathbb{S}^2,g)$, with $g$ satisfying $\lambda_1 = \lambda_1(-\Delta_g + K(g))>0$, where $\lambda_1$ is the first eigenvalue ... More
Search for Super Earths by Timing of Transits with CoRoTOct 05 2012We explore the possibility of detecting Super Earths via transit timing variations with the satellite CoRoT.
Chiral approach to the rho meson in nuclear matterNov 09 2000Jan 08 2002In this work, the properties of the $\rho$ meson at rest in cold symmetric nuclear matter are studied. We make use of a chiral unitary approach to pion-pion scattering in the vector-isovector channel, calculated from the lowest order Chiral Perturbation ... More
Asymptotically flat extensions with chargeMar 21 2019The Bartnik mass is a notion of quasi-local mass which is remarkably difficult to compute. Mantoulidis and Schoen [2016] developed a novel technique to construct asymptotically flat extensions of minimal Bartnik data in such a way that the ADM mass of ... More
A New Apparatus for Detecting Micron-Scale Deviations from Newtonian GravityJan 07 2008Feb 12 2008We describe the design and construction of a new apparatus for detecting or constraining deviations from Newtonian gravity at short length scales. The apparatus consists of a new type of probe with rotary mass actuation and cantilever-based force detection ... More
In pixels we trust: From Pixel Labeling to Object Localization and Scene CategorizationJul 19 2018While there has been significant progress in solving the problems of image pixel labeling, object detection and scene classification, existing approaches normally address them separately. In this paper, we propose to tackle these problems from a bottom-up ... More
Learning to Exploit the Prior Network Knowledge for Weakly-Supervised Semantic SegmentationApr 13 2018Feb 22 2019Training a Convolutional Neural Network (CNN) for semantic segmentation typically requires to collect a large amount of accurate pixel-level annotations, a hard and expensive task. In contrast, simple image tags are easier to gather. With this paper we ... More
Asymptotically hyperbolic extensions and an analogue of the Bartnik massFeb 09 2018Jun 22 2018The Bartnik mass is a quasi-local mass tailored to asymptotically flat Riemannian manifolds with non-negative scalar curvature. From the perspective of general relativity, these model time-symmetric domains obeying the dominant energy condition without ... More
On the classification of laminations associated to quadratic polynomialsMar 06 2007Given any rational map $f$, there is a lamination by Riemann surfaces associated to $f$. Such laminations were constructed in general by Lyubich and Minsky. In this paper, we classify laminations associated to quadratic polynomials with periodic critical ... More
Can stellar wobble in triple systems mimic a planet?Sep 13 2005The first extrasolar planets have been detected by the measurement of the wobble of the parent star. This wobble leads to the periodic modulation of three observables: the radial velocity, the position on the sky and the time of arrival of periodic signals. ... More
Detecting companions to extrasolar planets using mutual eventsMar 23 2007We investigate a new approach to the detection of companions to extrasolar planets beyond the transit method. We discuss the possibility of the existence of binary planets. We develop a method based on the imaging of a planet-companion as an unresolved ... More
A hydrodynamical model for the FERMI-LAT gamma-ray light curve of Blazar PKS1510-089Dec 01 2012May 16 2013A physical description of the formation and propagation of the working surface inside the relativistic jet of the Blazar PKS 1510-089 are used to model its gamma-ray variability light curve using FERMI-LAT data from 2008 to 2012. The physical model is ... More
Lipschitz tensor productAug 08 2014May 20 2015Inspired by ideas of R. Schatten in his celebrated monograph on a theory of cross-spaces, we introduce the notion of a Lipschitz tensor product X\boxtimes E of a pointed metric space and a Banach space E as a certain linear subspace of the algebraic dual ... More
Feshbach resonances in potassium Bose-Bose mixturesOct 29 2018We present a detailed study of the scattering properties of ultracold mixtures of bosonic potassium atoms. We locate 20 previously unobserved Feshbach resonances in isotopic 39K-41K mixtures. These are assigned to s-wave molecular channels by comparison ... More
Bright soliton to quantum droplet transition in a mixture of Bose-Einstein condensatesOct 30 2017Attractive Bose-Einstein condensates can host two types of macroscopic self-bound states of different nature: bright solitons and quantum liquid droplets. Here, we investigate the connection between them with a Bose-Bose mixture confined in an optical ... More
Quantum liquid droplets in a mixture of Bose-Einstein condensatesAug 25 2017Quantum droplets are small clusters of atoms self-bound by the balance of attractive and repulsive forces. Here we report on the observation of a novel type of droplets, solely stabilized by contact interactions in a mixture of two Bose-Einstein condensates. ... More
First Astronomical Application of a Cryogenic TES SpectrophotometerMay 27 1999We report on the first astronomical observations with a photon counting pixel detector that provides arrival time- (delta t = 100ns) and energy- (delta E_gamma < 0.15eV) resolved measurements from the near IR through the near UV. Our test observations ... 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
Low-Mass WIMP Sensitivity and Statistical Discrimination of Electron and Nuclear Recoils by Varying Luke-Neganov Phonon Gain in Semiconductor DetectorsJan 18 2012Amplifying the phonon signal in a semiconductor dark matter detector can be accomplished by operating at high voltage bias and converting the electrostatic potential energy into Luke-Neganov phonons. This amplification method has been validated at up ... More
On hyperbolic metric and asymptotically finite invariant differentials in holomorphic dynamicsSep 23 2015Given a rational map $R$, we consider the complement of the postcritical set $S_R$. In this paper we discuss the existence of invariant Beltrami differentials supported on a $R$ invariant subset $A$ of $S_R$. Under some geometrical restrictions, either ... More
On dynamical Teichmuller spacesNov 30 2009Following ideas from a preprint of the second author, see [2], we investigate relations of dynamical Teichmuller spaces with dynamical objects. We also establish some connections with the theory of deformations of inverse limits and laminations in holomorphic ... More
Strange and charm mesons at FAIRNov 11 2009We study the properties of strange and charm mesons in hot and dense matter within a self-consistent coupled-channel approach for the experimental conditions of density and temperature expected for the CBM experiment at FAIR/GSI. The in-medium solution ... More
The GTC exoplanet transit spectroscopy survey. IV.: No asymmetries in the transit of Corot-29bFeb 01 2016Context. The launch of the exoplanet space missions obtaining exquisite photometry from space has resulted in the discovery of thousands of planetary systems with very different physical properties and architectures. Among them, the exoplanet CoRoT-29b ... More
On the natural extension of a map with a Siegel or Cremer pointMar 15 2011In this note we show that the regular part of the natural extension (in the sense of Lyubich and Minsky) of quadratic map $f(z) = e^{2 \pi i \theta}z + z^2$ with irrational $\theta$ of bounded type has only parabolic leaves except the invariant lift of ... More
Faddeev-Jackiw quantization of an Abelian and non-Abelian exotic action for gravity in three dimensionsApr 17 2015Jun 23 2015A detailed Faddeev-Jackiw quantization of an Abelian and non-Abelian exotic action for gravity in three dimensions is performed. We obtain for the theories under study the constraints, the gauge transformations, the generalized Faddeev-Jackiw brackets ... More
Exoplanet phase curves at large phase angles. Diagnostics for extended hazy atmospheresOct 14 2017At optical wavelengths, Titan's brightness for large Sun-Titan-observer phase angles significantly exceeds its dayside brightness. The brightening that occurs near back-illumination is due to moderately large haze particles in the moon's extended atmosphere ... More
UV-IR Science Prospects with TES Imaging ArraysAug 03 2002We are developing photon-counting cameras employing cryogenic arrays of energy-resolving TES (Transition Edge Sensor) pixels. These are being tested in ground-based instruments, but will have their greatest impact when employed on space platforms, where ... More
CoRoT 101186644: A transiting low-mass dense M-dwarf on an eccentric 20.7-day period orbit around a late F-starFeb 23 2013Mar 10 2013We present the study of the CoRoT transiting planet candidate 101186644, also named LRc01_E1_4780. Analysis of the CoRoT lightcurve and the HARPS spectroscopic follow-up observations of this faint (m_V = 16) candidate revealed an eclipsing binary composed ... More
Quaternion geometries on the twistor space of the six-sphereFeb 26 2013We explicitly describe all SO(7)-invariant almost quaternion-Hermitian structures on the twistor space of the six sphere and determine the types of their intrinsic torsion.
The intrinsic torsion of almost quaternion-Hermitian manifoldsJul 06 2007We study the intrinsic torsion of almost quaternion-Hermitian manifolds via the exterior algebra. In particular, we show how it is determined by particular three-forms formed from simple combinations of the exterior derivatives of the local Kaehler forms. ... More
Revealing mass-degenerate states in Higgs boson signalsMay 10 2019The observed Higgs boson signals to-date could be due to having two quasi-degenerate 125 GeV scalar states in nature. This kind of scenario tallies well with the predictions from the Next-to-Minimal Supersymmetric Standard Model (NMSSM). We have analysed ... More
Homogeneous nearly Kähler manifoldsJun 14 2010Nov 26 2010The structure of nearly K\"ahler manifolds was studied by Gray in several papers. More recently, a relevant progress on the subject has been done by Nagy. Among other results, he proved that a strict and complete nearly K\"ahler manifold is locally a ... More
Harmonic G-structuresJun 01 2007Sep 28 2007For closed and connected subgroups G of SO(n), we study the energy functional on the space of G-structures of a (compact) Riemannian manifold M, where G-structures are considered as sections of the quotient bundle O(M)/G. Then, we deduce the corresponding ... More
Nearly Kahler homogeneous manifolds with positive curvatureApr 03 2009We prove that a 2n-dimensional compact homogeneous nearly Kahler manifold with strictly positive sectional curvature is isometric to CP^{n}, equipped with the symmetric Fubini-Study metric or with the standard Sp(m)-homogeneous metric, n =2m-1, or to ... More
Understanding and improving the Effective Mass for LHC searchesJul 02 2012A handy and extensively used kinematic variable in LHC analyses, especially for golden SUSY signals of multijets plus missing energy, is the Effective Mass, M_eff = sum_j |p_T^j|+ |p_T^miss|. Empirically, the value of M_eff at which the histogram of events ... More
Harmonic almost contact structures via the intrinsic torsionOct 08 2008We go further on the study of harmonicity for almost contact metric structures already initiated by Vergara-Diaz and Wood. By using the intrinsic torsion, we characterise harmonic almost contact metric structures in several equivalent ways and show conditions ... More
Kaon-antikaon nuclear optical potentials and the kappa meson in the nuclear mediumMar 03 2004Apr 26 2004We study the properties of the kappa meson in the nuclear medium, starting from a chiral unitary model of S-wave, I=1/2 K-pi scattering, which describes the elastic K-pi phase shifts and generates a pole in the amplitude. Medium effects are considered ... More
Phi meson mass and decay width in nuclear matterMay 29 2002Mar 12 2003The $\phi$ meson spectrum, which in vacuum is dominated by its coupling to the $\bar{K} K$ system, is modified in nuclear matter. Following a model based on chiral SU(3) dynamics we calculate the $\phi$ meson selfenergy in nuclear matter considering the ... More
Higher dimensional black hole initial data with prescribed boundary metricMay 07 2015Feb 24 2016We obtain higher dimensional analogues of the results of Mantoulidis and Schoen in [8]. More precisely, we show that (i) any metric $g$ with positive scalar curvature on the $3$-sphere $S^3$ can be realized as the induced metric on the outermost apparent ... More
The European Large Area ISO Survey VI - Discovery of a new hyperluminous infrared galaxyJul 09 2001We report the discovery of the first hyperluminous infrared galaxy (HyLIG) in the course of the European Large Area ISO Survey (ELAIS). This object has been detected by ISO at 6.7, 15, and 90 microns, and is found to be a broad-line, radio-quiet quasar ... More
Dust Properties of Double-Tailed Active Asteroid (6478) GaultMar 24 2019Apr 12 2019Asteroid (6478) Gault was discovered to exhibit a comet-like tail in observations from December 2018, becoming a new member of the so-called active asteroid population in the main asteroid belt. The aims are to investigate the grain properties of the ... More
Minimally Unbalanced QuiversOct 02 2018Oct 08 2018We develop a classification of \emph{minimally unbalanced} $3d~\mathcal{N}=4$ quiver gauge theories. These gauge theories are important because the isometry group $G$ of their Coulomb branch contains a single factor, which is either a classical or an ... More
On the dust environment of Main-Belt Comet 313P/GibbsMay 06 2015We present observations carried out using the 10.4 m Gran Telescopio Canarias and an interpretative model of the dust environment of activated asteroid 313P/Gibbs. We discuss three different models relating to different values of the dust parameters, ... More
Dust loss from activated asteroid P/2015 X6May 16 2016We present observations and dust tail models of activated asteroid P/2015 X6 from deep imaging data acquired at the 10.4m Gran Telescopio Canarias (GTC) from mid-December 2015 to late January 2016. The results of the modeling indicate that the asteroid ... More
OB Stars in the Solar Neighborhood II: KinematicsMay 17 2006Using the spatial classification method and the structural parameters estimated for the Gould Belt (GB) and the local Galactic disk (LGD) from a previous paper, we have evaluated spatial membership probabilities for a sample of O and B stars from the ... More
Magnetic Quivers, Higgs Branches, and 6d N=(1,0) TheoriesApr 28 2019The physics of M5 branes placed near an M9 plane on an A-type ALE singularity exhibits a variety of phenomena that introduce additional massless degrees of freedom. There are tensionless strings whenever two M5 branes coincide or whenever an M5 brane ... More
OB Stars in the Solar Neighborhood I: Analysis of their Spatial DistributionFeb 22 2006We present a newly-developed, three-dimensional spatial classification method, designed to analyze the spatial distribution of early type stars within the 1 kpc sphere around the Sun. We propose a distribution model formed by two intersecting disks -the ... More
Hierarchical Star Formation: Stars and Stellar Clusters in the Gould BeltMar 03 2009We perform a study of the spatial and kinematical distribution of young open clusters in the solar neighborhood, discerning between bound clusters and transient stellar condensations within our sample. Then, we discriminate between Gould Belt (GB) and ... More
Internal shocks in relativistic jets with time--dependent sourcesOct 20 2007Dec 17 2008We present a ballistic description of the formation and propagation of the working surface of a relativistic jet. Using simple laws of conservation of mass and linear momentum at the working surface, we obtain a full description of the working surface ... More
Upper bounds on SUSY masses from the LHCAug 18 2011Jan 07 2012The LHC is already putting bounds on the Higgs mass. In this paper we use those bounds to put constrains on the MSSM parameter space coming from the fact that, in supersymmetry, the Higgs mass is a function of the masses of sparticles, and therefore an ... More
Evaluation of the $ππ$ scattering amplitude in the $σ$-channel at finite densityMar 04 2005The $\pi\pi$ scattering amplitude in the $\sigma$-channel is studied at finite baryonic density in the framework of a chiral unitary approach which successfully reproduces the meson meson phase shifts and generates the $f_0$ and $\sigma$ resonances in ... More
Asymptotically flat extensions of CMC Bartnik dataDec 15 2016Apr 16 2017Let $g$ be a metric on the $2$-sphere $\mathbb{S}^2$ with positive Gaussian curvature and $H$ be a positive constant. Under suitable conditions on $(g, H)$, we construct smooth, asymptotically flat $3$-manifolds $M$ with non-negative scalar curvature, ... More
Gamma-Ray Bursts, new cosmological beaconsFeb 19 2008Feb 22 2008Long Gamma-Ray Bursts (GRBs) are the brightest electromagnetic explosions in the Universe, associated to the death of massive stars. As such, GRBs are potential tracers of the evolution of the cosmic massive star formation, metallicity, and Initial Mass ... More
New techniques for chargino-neutralino detection at LHCDec 20 2012Jun 24 2013The recent LHC discovery of a Higgs-like boson at 126 GeV has important consequences for SUSY, pushing the spectrum of strong-interacting supersymmetric particles to high energies, very difficult to probe at the LHC. This gives extra motivation to study ... More
$φ$ meson self-energy in nuclear matter from $φN$ resonant interactionsSep 13 2016The $\phi$-meson properties in cold nuclear matter are investigated by implementing resonant $\phi N$ interactions as described in effective approaches including the unitarization of scattering amplitudes. Several $N^*$-like states are dynamically generated ... More
Harmonicity of sections of sphere bundlesNov 23 2007We consider the energy functional on the space of sections of a sphere bundle over a Riemannian manifold (M, <,>) equipped with the Sasaki metric and we discuss the characterising condition for critical points. Likewise, we provide a useful method for ... More
Asymptotically flat extensions with chargeMar 21 2019Mar 29 2019The Bartnik mass is a notion of quasi-local mass which is remarkably difficult to compute. Mantoulidis and Schoen [2016] developed a novel technique to construct asymptotically flat extensions of minimal Bartnik data in such a way that the ADM mass of ... More
Scaling laws for the non-linear coupling constant of a Bose-Einstein condensate at the threshold of delocalizationFeb 22 2012We explore the localization of a quasi-one-, quasi-two-, and three-dimensional ultra-cold gas by a finite-range defect along the corresponding 'free'-direction/s. The time-independent non-linear Schroedinger equation that describes a Bose-Einstein condensate ... More
The rho meson in a nuclear mediumJun 16 2000In this work, propagation properties of the rho meson in symmetric nuclear matter are studied. We make use of a coupled channel unitary approach to meson-meson scattering, calculated from the lowest order Chiral Perturbation Theory lagrangian including ... More
Boltzmann entropy of a Newtonian UniverseMar 22 2017May 04 2017A dynamical estimate is given for the Boltzmann entropy of the Universe, under the simplifying assumptions provided by Newtonian cosmology. We first model the cosmological fluid as the probability fluid of a quantum-mechanical system. Next, following ... More
Experimental studies of QCD using flavour tagged jets with DELPHISep 10 1996Identified $b\overline{b}g$ and $q\overline{q}\gamma$ events from DELPHI are used to measure the ratio of the mean charged particle multiplicity distribution between gluon and quark jets. The dependence of this ratio with the jet energy is established ... More
Bayesian approach and Naturalness in MSSM analyses for the LHCDec 02 2008The start of LHC has motivated an effort to determine the relative probability of the different regions of the MSSM parameter space, taking into account the present, theoretical and experimental, wisdom about the model. Since the present experimental ... More
Quantum Polarization of D4-branesSep 02 2004Oct 20 2004The low energy effective field theory of type II D4-branes coupled to bulk supergravity fields is used to investigate {\it quantum} effects for D4-branes in the D0 supergravity background. Classically, the D4-branes are unaffected by this background. ... More
In-medium properties of the phi meson with phi N resonant contributionsSep 29 2016Nuclear production experiments report missing absorption processes of the in-medium phi meson. Contributions arising from the K-bar K cloud have already been widely studied, and therefore we investigate the phi-meson properties in cold nuclear matter ... More
Labeling Bias in Galaxy MorphologiesNov 08 2018We present a metric to quantify systematic labeling bias in galaxy morphology data sets stemming from the quality of the labeled data. This labeling bias is independent from labeling errors and requires knowledge about the intrinsic properties of the ... More
Slowdown of nonequilibrium dynamics in gapped `qubit' chainsFeb 11 2004We solve the nonequilibrium dynamics of qubits or quantum spin chains (s=1/2) modeled by an anisotropic XY Hamiltonian, when the initial condition is prepared as a spatially inhomogeneous state of the magnetization. Infinite systems are studied analytically, ... More
Amplitude, phase, and complex analyticityFeb 21 2017Expressing the Schroedinger Lagrangian ${\cal L}$ in terms of the quantum wavefunction $\psi=\exp(S+{\rm i}I)$ yields the conserved Noether current ${\bf J}=\exp(2S)\nabla I$. When $\psi$ is a stationary state, the divergence of ${\bf J}$ vanishes. One ... More
Experimental determination of the b quark mass in DELPHIAug 20 1997The running mass of the b quark as defined in the MS-bar renormalization scheme, m_b, was measured at the M_Z scale using 2.8 million hadronic Z^0 decays collected by the DELPHI experiment at LEP. The result is m_b(M_Z) = 2.67 +- 0.25 (stat.) +- 0.34 ... More
A study of the performance of the transit detection tool DST in space-based surveys. Application of the CoRoT pipeline to Kepler dataNov 28 2012Dec 05 2012Context. Transit detection algorithms are mathematical tools used for detecting planets in the photometric data of transit surveys. In this work we study their application to space-based surveys. Aims: Space missions are exploring the parameter space ... More
The health of SUSY after the Higgs discovery and the XENON100 dataDec 19 2012Jul 30 2013We analyze the implications for the status and prospects of supersymmetry of the Higgs discovery and the last XENON data. We focus mainly, but not only, on the CMSSM and NUHM models. Using a Bayesian approach we determine the distribution of probability ... More
Early evolution of disrupted asteroid P/2016 G1 (PANSTARRS)Jul 12 2016We present deep imaging observations of activated asteroid P/2016 G1 (PANSTARRS) using the 10.4m Gran Telescopio Canarias (GTC) from late April to early June 2016. The images are best interpreted as the result of a relatively short-duration event with ... More
Stability of graphical tori with almost nonnegative scalar curvatureFeb 09 2019By works of Schoen--Yau and Gromov--Lawson any Riemannian manifold with nonnegative scalar curvature and diffeomorphic to a torus is isometric to a flat torus. Gromov conjectured subconvergence of tori with respect to a weak Sobolev type metric when the ... More
About simple variational splines from the Hamiltonian viewpointNov 07 2017In this paper, we study simple splines on a Riemannian manifold $Q$ from the point of view of the Pontryagin maximum principle (PMP) in optimal control theory. The control problem consists in finding smooth curves matching two given tangent vectors with ... More
The ALHAMBRA Project: A large area multi medium-band optical and NIR photometric surveyJun 18 2008(ABRIDGED) We describe the first results of the ALHAMBRA survey which provides cosmic tomography of the evolution of the contents of the Universe over most of Cosmic history. Our approach employs 20 contiguous, equal-width, medium-band filters covering ... More
Dust-correlated cm-wavelength continuum emission on translucent clouds ζ Oph and LDN 1780Feb 21 2011The diffuse cm-wave IR-correlated signal, the "anomalous" CMB foreground, is thought to arise in the dust in cirrus clouds. We present Cosmic Background Imager (CBI) cm-wave data of two translucent clouds, {\zeta} Oph and LDN 1780 with the aim of characterising ... More
Top quark production cross-section at the Tevatron Run 2May 22 2003The top quark pair production cross-section ${\sigma}_{t\bar{t}}$ has been measured in $p\bar{p}$ collisions at center of mass energies of 1.96 TeV using Tevatron Run 2 data. In the begining of Run 2 both CDF and D\O\ $\sigma_{t\bar{t}}$ measurements ... More
Energy weighted sum rules for mesons in hot and dense matterMar 06 2009Sep 10 2009We study energy weighted sum rules of the pion and kaon propagator in nuclear matter at finite temperature. The sum rules are obtained from matching the Dyson form of the meson propagator with its spectral Lehmann representation at low and high energies. ... More
What makes a gesture a gesture? Neural signatures involved in gesture recognitionJan 20 2017Previous work in the area of gesture production, has made the assumption that machines can replicate "human-like" gestures by connecting a bounded set of salient points in the motion trajectory. Those inflection points were hypothesized to also display ... More
Communication Modalities for Supervised Teleoperation in Highly Dexterous Tasks - Does one size fit all?Apr 17 2017This study tries to explain the connection between communication modalities and levels of supervision in teleoperation during a dexterous task, like surgery. This concept is applied to two surgical related tasks: incision and peg transfer. It was found ... More
Opposite charged two-body system of identical counter-rotating black holesSep 10 2013May 12 2014A 4-parametric exact solution describing a two-body system of identical Kerr-Newman counter-rotating black holes endowed with opposite electric/magnetic charges is presented. The axis conditions are solved in order to really describe two black holes separated ... More
Strange meson production at high density and temperatureJun 18 2010The properties of strange mesons ($K$, $\bar K$ and $\bar K^*$) in dense matter are studied using a unitary approach in coupled channels for meson-baryon scattering. The kaon-nucleon interaction incorporates $s$- and $p$-wave contributions within a chiral ... More
Some geometric features of Berry's phaseMay 15 2007Jun 08 2007In this letter, we elaborate on the identification and construction of the differential geometric elements underlying Berry's phase. Berry bundles are built generally from the physical data of the quantum system under study. We apply this construction ... More
A critical re-evaluation of the Thorne-Żytkow object candidate HV 2112Jun 19 2018Jun 29 2018It has been argued in the literature that the star HV~2112 in the Small Magellanic Cloud is the first known example of a T\.ZO, a Red Supergiant with a degenerate neutron core. This claim is based on the star having a high luminosity ($\log (L/L_\odot)$~> ... More
QSO2 outflow characterization using data obtained with OSIRIS at the Gran Telescopio CanariasMay 09 2019Ionized outflows are ubiquitous in non radio-loud obscured quasars (QSO2s) at different redshifts. We search for large-scale ionized outflows associated with six optically selected QSO2 (five non-radio-loud and one radio-loud) at $z\sim$ 0.2-0.5, targeting ... More
Abstract MiningApr 26 2018We have developed an application that will take a "MEDLINE" output from the PubMed database and allows the user to cluster all non-trivial words of the abstracts of the PubMed output. The number of clusters to use can be selected by the user. A specific ... More
Composite Inference for Gaussian ProcessesApr 24 2018Aug 01 2018Large-scale Gaussian process models are becoming increasingly important and widely used in many areas, such as, computer experiments, stochastic optimization via simulation, and machine learning using Gaussian processes. The standard methods, such as ... More
Ladder operators for the Ben Daniel-Duke Hamiltonians and their SUSY partnersFeb 25 2019Position dependent mass systems can be described by a class of operators which include the Ben Daniel-Duke Hamiltonians. The usual methods to solve this kind of problems are, in general, either numerical or those looking for a connection with constant ... More
Topological defects in string theory orbifolds with target spaces $\mathbb{C}/\mathbb{Z}_N$ and $S^1/\mathbb{Z}_2$Jun 18 2017We study conformal defects in two important examples of string theory orbifolds. First, we show that topological defects in the language of Landau-Ginzburg models carry information about the RG flow between the non-compact orbifolds $\mathbb{C}/\mathbb{Z}_d$. ... More
Multi-label Classification of User Reactions in Online NewsSep 08 2018Nov 27 2018The increase in the number of Internet users and the strong interaction brought by Web 2.0 made the Opinion Mining an important task in the area of natural language processing. Although several methods are capable of performing this task, few use multi-label ... More
Neutrino Oscillations with Reactor NeutrinosJan 11 2007Feb 22 2007Prospect measurements of neutrino oscillations with reactor neutrinos are reviewed in this document. The following items are described: neutrinos oscillations status, reactor neutrino experimental strategy, impact of uncertainties on the neutrino oscillation ... More
Base-controlled mechanical systems and geometric phasesJun 11 2007In this paper, we carry a detailed study of mechanical systems with configuration space $Q\longrightarrow Q/G$ for which the base $Q/G$ variables are being controlled. The overall system's motion is considered to be induced from the base one due to the ... More
A Generalized Montgomery Phase Formula for Rotating Self Deforming BodiesNov 20 2006We study the motion of self deforming bodies with non zero angular momentum when the changing shape is known as a function of time. The conserved angular momentum with respect to the center of mass, when seen from a rotating frame, describes a curve on ... More
The Distance, Mass, and Radius of the Neutron Star in 4U 1608-52Nov 25 2008Feb 25 2010Low mass X-ray binaries that show thermonuclear bursts are ideal sources for constraining the equation of state of neutron star matter. The lack of independent distance measurements for most of these sources, however, prevents a systematic exploration ... More
The rho meson in nuclear matter - a chiral unitary approachJul 16 2001In this work, the properties of the $\rho$ meson at rest in cold symmetric nuclear matter are studied. We make use of a chiral unitary approach to pion-pion scattering in the vector-isovector channel, calculated from the lowest order Chiral Perturbation ... More
Looking for signals of New Physics in the Top quark samples with the CDF detectorSep 14 2007Twelve years after the discovery of the Top quark, the CDF detector has collected large samples of tt-bar events with integrated luminosities up to 1-1.7 fb^-1, where we are able to probe our knowledge of the Standard Model Top quark. This article will ... More
Limits to the presence of transiting circumbinary planets in CoRoT dataOct 26 2016Nov 01 2016The CoRoT mission during its flight-phase 2007-2012 delivered the light-curves for over 2000 eclipsing binaries. Data from the Kepler mission have proven the existence of several transiting circumbinary planets. Albeit light-curves from CoRoT have typically ... More
CIRCE: The Canarias InfraRed Camera Experiment for the Gran Telescopio CanariasSep 16 2017The Canarias InfraRed Camera Experiment (CIRCE) is a near-infrared (1-2.5 micron) imager, polarimeter and low-resolution spectrograph operating as a visitor instrument for the Gran Telescopio Canarias 10.4-meter telescope. It was designed and built largely ... More
Limits to the presence of transiting circumbinary planets in CoRoT dataOct 26 2016The CoRoT mission during its flight-phase 2007-2012 delivered the light-curves for over 2000 eclipsing binaries. Data from the Kepler mission have proven the existence of several transiting circumbinary planets. Albeit light-curves from CoRoT have typically ... More