Results for "C. Lopez-Caraballo"

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Detection of Anomalous Microwave Emission in the Pleiades Reflection Nebula with WMAP and the COSMOSOMAS ExperimentSep 19 2011We present evidence for anomalous microwave emission (AME) in the Pleiades reflection nebula, using data from the seven-year release of the Wilkinson Microwave Anisotropy Probe (WMAP) and from the COSMOSOMAS experiment. The flux integrated in a 1-degree ... More
Resilience of a synchronized multi-agent systemApr 29 2016Fault tolerance is increasingly important for unmanned autonomous vehicles. For example, in a multi robot system the agents need the ability to effectively detect and tolerate internal failures in order to continue performing their tasks without the need ... More
Computing the $k$-resilience of a Synchronized Multi-Robot SystemJul 22 2017We study an optimization problem that arises in the design of covering strategies for multi-robot systems. Consider a team of $n$ cooperating robots traveling along predetermined closed and disjoint trajectories. Each robot needs to periodically communicate ... More
Distribution of amplitude in an extended phase space of a generic quantum systemJul 28 2015The action reaction principle is violated by the projection of state in some simple quantum measurements. A formulation of Quantum Mechanics in an extended phase space is proposed in order to restore the action reaction principle. All predictions of the ... More
The Atacama Cosmology Telescope: CO(J = 3 - 2) mapping and lens modeling of an ACT-selected dusty star-forming galaxyJul 24 2018Jun 03 2019We report Northern Extended Millimeter Array (NOEMA) CO($J = 3 - 2$) observations of the dusty star-forming galaxy ACT-S\,J020941+001557 at $z = 2.5528$, which was detected as an unresolved source in the Atacama Cosmology Telescope (ACT) equatorial survey. ... More
Extremal antipodal polygons and polytopesJan 28 2013Let $S$ be a set of $2n$ points on a circle such that for each point $p \in S$ also its antipodal (mirrored with respect to the circle center) point $p'$ belongs to $S$. A polygon $P$ of size $n$ is called \emph{antipodal} if it consists of precisely ... More
Matching colored points with rectanglesSep 14 2013Jan 03 2014Let $S$ be a point set in the plane such that each of its elements is colored either red or blue. A matching of $S$ with rectangles is any set of pairwise-disjoint axis-aligned rectangles such that each rectangle contains exactly two points of $S$. Such ... More
Millimeter and far-IR study of the IRCD SDC 341.232-0.268Jul 10 2019We analyze the molecular gas and dust associated with the infrared dark cloud SDC 341.232-0.268 in order to investigate the characteristics and parameters of the gas, determine the evolutionary status of four embedded EGO candidates and establish possible ... More
Critical state theory for nonparallel flux line lattices in type-II superconductorsJul 16 2001Coarse-grained flux density profiles in type-II superconductors with non-parallel vortex configurations are obtained by a proposed phenomenological least action principle. We introduce a functional $C[H(x)]$, which is minimized under a constraint of the ... More
The Critical State in Type-II Superconductors with Cross-Flow EffectsSep 20 2002A theoretical framework is presented, which allows to explain many experimental facts related to pinning and cross-flow effects between flux tubes in type-II superconductors. It is shown that critical state principles, in the manner introduced by C. P. ... More
Systems with two symmetric absorbing states: relating the microscopic dynamics with the macroscopic behaviorOct 08 2008We propose a general approach to study spin models with two symmetric absorbing states. Starting from the microscopic dynamics on a square lattice, we derive a Langevin equation for the time evolution of the magnetization field, that successfully explains ... More
Multifunctional Heusler alloy: experimental evidences of enhanced magnetocaloric properties at room temperature and half-metallicityAug 07 2015Heusler alloys are widely studied due to their interesting structural and magnetic properties, like magnetic memory shape ability, coupled magneto-structural phase transitions and half-metallicity; ruled, for many cases, by the valence electrons number ... More
The QUIJOTE Experiment: Prospects for CMB B-MODE polarization detection and foregrounds characterizationFeb 13 2018QUIJOTE (Q-U-I JOint TEnerife) is an experiment designed to achieve CMB B-mode polarization detection and sensitive enough to detect a primordial gravitational-wave component if the B-mode amplitude is larger than r = 0.05. It consists in two telescopes ... More
A random laser tailored by directional stimulated emissionDec 15 2011A disordered structure embedding an active gain material and able to lase is called random laser (RL). The RL spectrum may appear either like a set of sharp resonances or like a smooth line superimposed to the fluorescence. A recent letter accounts for ... More
On the practical global uniform asymptotic stability of stochastic differential equationsMar 12 2015The method of Lyapunov functions is one of the most effective ones for the investigation of stability of dynamical systems, in particular, of stochastic differential systems. The main purpose of the paper is the analysis of the stability of stochastic ... More
Exponential decay estimates for Singular Integral operatorsApr 07 2012Apr 15 2013The following subexponential estimate for commutators is proved |[|\{x\in Q: |[b,T]f(x)|>tM^2f(x)\}|\leq c\,e^{-\sqrt{\alpha\, t\|b\|_{BMO}}}\, |Q|, \qquad t>0.\] where $c$ and $\alpha$ are absolute constants, $T$ is a Calder\'on--Zygmund operator, $M$ ... More
Constraints on the Polarization of the Anomalous Microwave Emission in the Perseus Molecular Complex from 7-year WMAP dataNov 04 2010We have used the seven year Wilkinson Microwave Anisotropy Probe (WMAP) data in order to update the measurements of the intensity signal in the G159.6-18.5 region within the Perseus Molecular Complex, and to set constraints on the polarization level of ... More
Improving bounds for singular operators via Sharp Reverse Hölder Inequality for $A_{\infty}$Apr 07 2012In this expository article we collect and discuss some recent results on different consequences of a Sharp Reverse H\"older Inequality for $A_{\infty}$ weights. For two given operators $T$ and $S$, we study $L^p(w)$ bounds of Coifman-Fefferman type. $ ... More
Phase-space approach to the study of decoherence in quantum walksAug 20 2003Dec 22 2003We analyze the quantum walk on a cycle using discrete Wigner functions as a way to represent the states and the evolution of the walker. The method provides some insight on the nature of the interference effects that make quantum and classical walks different. ... More
Packing a fixed number of identical circles in a circular container with circular prohibited areasNov 01 2018In this paper we consider the problem of packing a fixed number of identical circles inside the unit circle container, where the packing is complicated by the presence of fixed size circular prohibited areas. Here the objective is to maximise the radius ... More
Fe I line shifts in the optical spectrum of the SunOct 07 1997New improvements in the measurement of both the optical solar spectrum and laboratory wavelengths for lines of neutral iron are combined to extract central wavelength shifts for 1446 lines observed in the Sun. This provides the largest available database ... More
Proposal for a Supersymmetric Standard ModelAug 29 2005Jul 24 2006The fact that neutrinos are massive suggests that the minimal supersymmetric standard model (MSSM) might be extended in order to include three gauge-singlet neutrino superfields with Yukawa couplings of the type $H_2 L \nu^c$. We propose to use these ... More
Double beta decay of sigma^- hyperonsDec 19 2002Dec 23 2002We compute the strangeness-conserving double beta decay of $\Sigma^-$ hyperons, which is the only hadronic system that can undergo such decays. We consider both, the lepton number conserving %$\Sigma^-\go \Sigma^++2e^-+2 \bar{\nu}$ $\Sigma^-\go \Sigma^+e^-e^-\bar{\nu}\bar{\nu}$ ... More
On the non-evolution of the dependence of black hole masses on bolometric luminosities for QSOsDec 19 2011There are extremely luminous quasi stellar objects (QSOs) at high redshift which are absent at low redshift. The lower luminosities at low redshifts can be understood as the external manifestation of either a lower Eddington ratio or a lower mass. To ... More
Toward a Clean Sample of Ultra-Luminous X-ray SourcesFeb 24 2006CONTEXT. Observational follow-up programmes for the characterization of ultra-luminous X-ray sources (ULXs) require the construction of clean samples of such sources in which the contamination by foreground/background sources is minimum. AIMS. In this ... More
Research on candidates for non-cosmological redshiftsSep 21 2005Sep 26 2005(Abridged:) The paradox of apparent optical associations of galaxies with very different redshifts, the so-called anomalous redshift problem, is around 35 years old, but is still without a clear solution and is surprisingly ignored by most of the astronomical ... More
QSO + galaxy association and discrepant redshifts in NEQ3Jan 28 2004Spectroscopy and deep imaging of the group NEQ3 are presented. This system is formed by three compact objects with relative separations of ~2.6 and ~2.8 arcsec, and a lenticular galaxy at ~17 arcsec from the geometric centre of the group. A diffuse filament ... More
Competitive Brownian and Levy walkersJul 21 2011Apr 10 2012Population dynamics of individuals undergoing birth and death and diffusing by short or long ranged twodimensional spatial excursions (Gaussian jumps or L\'{e}vy flights) is studied. Competitive interactions are considered in a global case, in which birth ... More
Proper motions and velocity asymmetries in the RW Aur jetJul 07 2003We present adaptive optics spectro-imaging observations of the RW Aur jet in optical forbidden lines, at an angular resolution of 0.4 arcsec. Comparison with HST data taken 2 years later shows that proper motions in the blueshifted and redshifted lobes ... More
Introducing Chaos in Economic Gas-like ModelsApr 02 2009This paper considers ideal gas-like models of trading markets, where each agent is identified as a gas molecule that interacts with others trading in elastic or money-conservative collisions. Traditionally, these models introduce different rules of random ... More
Spatial clustering of interacting bugs: Levy flights versus Gaussian jumpsAug 20 2010Aug 30 2011A biological competition model where the individuals of the same species perform a two-dimensional Markovian continuous-time random walk and undergo reproduction and death is studied. The competition is introduced through the assumption that the reproduction ... More
Binding energy corrections in positronium decaysApr 21 2000Positronium annihilation amplitudes that are computed by assuming a factorization approximation with on-shell intermediate leptons, do not exhibit good analytical behavior. We propose an ansatz which allows to include binding energy corrections and obtain ... More
Decoherence during Inflation: the generation of classical inhomogeneitiesJun 08 2005Aug 23 2005We show how the quantum to classical transition of the cosmological fluctuations produced during inflation can be described by means of the influence functional and the master equation. We split the inflaton field into the system-field (long-wavelength ... More
First tentative detection of anisotropy in the QSO distribution around nearby edge-on spiral galaxiesSep 19 2006AIMS. To check whether the polar angle distribution of QSOs around nearby spiral galaxies is isotropic or not. METHODS. A statistical analysis of the polar angle distribution of large samples of QSOs from the SDSS survey and Monte Carlo simulations to ... More
NLO predictions for the growth of $F_2$ at small $x$ and comparison with experimental dataMay 24 1996We present parametrizations for the proton structure function $F_2$ in the next to leading order in perturbative QCD. The calculations show that the dominant term to $F_2(x,Q^2)$ should grow as $x^{-\ls}$ for small $x$ values, with the exponent $\ls$ ... More
Can Life develop in the expanded habitable zones around Red Giant Stars?Mar 23 2005We present some new ideas about the possibility of life developing around sub-giant and red giant stars. Our study concerns the temporal evolution of the habitable zone. The distance between the star and the habitable zone, as well as its width, increases ... More
Variational thermodynamics of relativistic thin disksJun 27 2013Aug 18 2014We present a relativistic model describing a thin disk system composed of two fluids. The system is surrounded by a halo in the presence of a non-trivial electromagnetic field. We show that the model is compatible with the variational multi-fluid thermodynamics ... More
Invariant manifolds for random and stochastic partial differential equationsJan 04 2009Random invariant manifolds are geometric objects useful for understanding complex dynamics under stochastic influences. Under a nonuniform hyperbolicity or a nonuniform exponential dichotomy condition, the existence of random pseudo-stable and pseudo-unstable ... More
Global an cocycle atractor for non-utonomous reaction-difussion equations . The case of null upper Lyapunov exponenteDec 14 2017In this paper we obtain a detailed description of the global and cocycle attractors for the skew-product semiflows induced by the mild solutions of a family of scalar linear-dissipative parabolic problems over a minimal and uniquely ergodic flow. We consider ... More
The Atacama Cosmology Telescope: Two-season ACTPol Extragalactic Point Sources and their Polarization propertiesNov 05 2018Nov 09 2018We report on measurements of the polarization of extragalactic sources at 148 GHz made during the first two seasons of the Atacama Cosmology Telescope Polarization (ACTPol) survey. The survey covered 680 deg$^{2}$ of the sky on the celestial equator. ... More
Unification models with reheating via primordial black holesJul 28 2011Feb 19 2012We study the possibility of reheating the universe through the evaporation of primordial black holes created at the end of inflation. This is shown to allow for the unification of inflation and dark matter under the dynamics of a single scalar field. ... More
The Limited Influence of Pressure Gradients on Late-type Stellar Line AsymmetriesJan 13 1997Line asymmetries and shifts are a powerful tool for studying velocity fields in the stellar photospheres. Other effects, however, could also generate asymmetries blurring the information of the velocity patterns. We have studied the shifts and asymmetries ... More
Homoclinic classes for sectional-hyperbolic setsAug 18 2014We prove that every sectional-hyperbolic Lyapunov stable set contains a nontrivial homoclinic class.
First-principles study of a single-molecule magnet Mn_{12} monolayer on the Au(111) surfaceAug 26 2007The electronic structure of a monolayer of single-molecule magnets Mn$_{12}$ on a Au(111) surface is studied using spin-polarized density-functional theory. The Mn$_{12}$ molecules are oriented such that the magnetic easy axis is normal to the surface, ... More
Cardinality of the Ellis semigroup on compact metric countable spacesNov 24 2016Let $E(X,f)$ be the Ellis semigroup of a dynamical system $(X,f)$ where $X$ is a compact metric space. We analyze the cardinality of $E(X,f)$ for a compact countable metric space $X$. A characterization when $E(X,f)$ and $E(X,f)^* = E(X,f) \setminus \{ ... More
Ground-Based Radial Velocity as Critical Support for Future NASA Earth-Finding MissionsMar 24 2019Future space-based direct imaging missions are poised to search for biosignatures in the atmospheres of potentially habitable planets orbiting nearby AFGKM stars. Although these missions could conduct a survey of high-priority target stars to detect candidate ... More
Three-body quantum Coulomb problem: analytic continuationJun 23 2015Jun 29 2016The second (unphysical) critical charge in the 3-body quantum Coulomb system of a nucleus of positive charge $Z$ and mass $m_p$, and two electrons, predicted by F~Stillinger has been calculated to be equal to $Z_{B}^{\infty}\ =\ 0.904854$ and $Z_{B}^{m_p}\ ... More
Topics in special functionsFeb 19 2015In this article, we solve the connection problem of the Hermite polynomials with the classical continuous orthogonal polynomials belonging to Askey scheme, using the hypergeometric functions method combined is with the work the Fields and Ismail.
Large restricted sumsets in general abelian groupMay 10 2013Let A, B and S be three subsets of a finite Abelian group G. The restricted sumset of A and B with respect to S is defined as A\wedge^{S} B= {a+b: a in A, b in B and a-b not in S}. Let L_S=max_{z in G}| {(x,y): x,y in G, x+y=z and x-y in S}|. A simple ... More
Star formation and stellar populations in the Wolf-Rayet(?) luminous compact blue galaxy IRAS 08339+6517Dec 01 2005Dec 01 2005IRAS 08339+6517 is a luminous infrared and Ly$\alpha$-emitting starburst galaxy that possesses a dwarf companion object at a projected distance of 56 kpc. An \ion{H}{i} tidal tail has recently been detected between both galaxies, suggesting that about ... More
Homoclinic orbits and entropy for three-dimensional flowsSep 25 2015We prove that every $C^1$ three-dimensional flow with positive topological entropy can be $C^1$ approximated by flows with homoclinic orbits. This extends a previous result for $C^1$ surface diffeomorphisms \cite{g}.
Automated supervised classification of variable stars II. Application to the OGLE databaseJun 20 2008We aim to extend and test the classifiers presented in a previous work against an independent dataset. We complement the assessment of the validity of the classifiers by applying them to the set of OGLE light curves treated as variable objects of unknown ... More
Geometric treatment of electromagnetic phenomena in conducting materials: variational principlesOct 26 2006The dynamical equations of an electromagnetic field coupled with a conducting material are studied. The properties of the interaction are described by a classical field theory with tensorial material laws in space-time geometry. We show that the main ... More
Lichnerowicz-Jacobi cohomology and homology of Jacobi manifolds: modular class and dualityOct 15 1999Lichnerowicz-Jacobi cohomology and homology of Jacobi manifolds are reviewed. We present both in a unified approach using the representation of the Lie algebra of functions on itself by means of the hamiltonian vector fields. The use of the associated ... More
An Inversion Technique to Derive Model Photospheres in Late-Type Stars from High-Resolution Spectroscopy: The SunOct 07 1997An inversion technique has been developed to recover LTE one-dimensional model photospheres for late-type stars from very high-resolution high signal-to-noise stellar line profiles. It is successfully applied to the Sun using a set of unblended Ti I, ... More
Analytical Behaviour of Positronium Decay AmplitudesJun 01 2000Positronium annihilation amplitudes that are computed by assuming a factorization approximation with on-shell intermediate leptons do not exhibit good analytical behaviour. Using dispersion techniques, we find new contributions that interfere with the ... More
On the separable quotient problem for Banach spacesSep 27 2017While the classic separable quotient problem remains open, we survey general results related to this problem and examine the existence of a particular infinitedimensional separable quotient in some Banach spaces of vector-valued functions, linear operators ... More
Measurements of the Intensity and Polarization of the Anomalous Microwave Emission in the Perseus molecular complex with QUIJOTEJan 19 2015Anomalous microwave emission (AME) has been observed in numerous sky regions, in the frequency range ~10-60 GHz. One of the most scrutinized regions is G159.6-18.5, located within the Perseus molecular complex. In this paper we present further observations ... More
Strength distribution of solar magnetic fields in photospheric quiet Sun regionsJun 08 2008The magnetic topology of the solar photosphere in its quietest regions is hidden by the difficulties to disentangle magnetic flux through the resolution element from the field strength of unresolved structures. The observation of spectral lines with strong ... More
Real-time trajectory control on a deterministic ion sourceDec 21 2018Jul 15 2019The major challenge to improve deterministic single ion sources is to control the position and momentum of each ion. Based on the extra information given by the electron created in a photoionization process, the trajectory of the correlated ion can be ... More
Biological activity in the wake of an island close to a coastal upwellingFeb 24 2008Hydrodynamic forcing plays an important role in shaping the dynamics of marine organisms, in particular of plankton. In this work we study the planktonic biological activity in the wake of an island which is close to an upwelling region. Our research ... More
Matrix elements of four-quark operators and ΔL=2 hyperon decaysJan 15 2013The study of neutrinoless double beta decays of nuclei and hyperons require the calculation of hadronic matrix elements of local four-quark operators that change the total charge by two units \Delta Q=2 . Using a low energy effective Lagrangian that induces ... More
$ΔL=2$ hyperon semileptonic decaysSep 17 2007We compute the rates of semileptonic B_A \to B_Bl^-l^- (l=e or \mu) hyperon transitions in a model where intermediate states involve loops of baryons and a Majorana neutrino. These rates turn out to be well below present experimental bounds and other ... More
New light and shadows on Stephan's QuintetFeb 28 2002We present deep broad-band R and narrow-band Halpha images of Stephan's Quintet. The observations in the R band show that the diffuse halo of the Stephan's Quintet is larger than previously thought and extends out to NGC 7320C. However, we have not found ... More
Formal analytical solutions for the Gross-Pitaevskii equationAug 28 2007Considering the Gross-Pitaevskii integral equation we are able to formally obtain an analytical solution for the order parameter $\Phi (x)$ and for the chemical potential $\mu $ as a function of a unique dimensionless non-linear parameter $\Lambda $. ... More
Quantum tomography in position and momentum spaceJul 11 2011May 23 2012We introduce a method of quantum tomography for a continuous variable system in position and momentum space. We consider a single two-level probe interacting with a quantum harmonic oscillator by means of a class of Hamiltonians, linear in position and ... More
Sudden Birth Versus Sudden Death of Entanglement in Multipartite SystemsFeb 13 2008Jul 23 2008We study the entanglement dynamics of two cavities interacting with independent reservoirs. Expectedly, we observe that, as the cavity entanglement is depleted, it is transferred to the reservoir degrees of freedom. We find that when the cavity entanglement ... More
Quantum Field Theory in the Limit x << 1Feb 05 1998The asymptotic high momentum behaviour of quantum field theories with cubic interactions is investigated using renormalization group techniques in the asymmetric limit x << 1. Particular emphasis is paid to theories with interactions involving more than ... More
Regge Behaviour from an Environmentally Friendly Renormalization GroupJun 11 1997Aug 19 1997The asymptotic behaviour of cubic field theories is investigated in the Regge limit using the techniques of environmentally friendly renormalization, environmentally friendly in the present context meaning asymmetric in its momentum dependence. In particular ... More
Photonic Crystals with Controlled DisorderNov 05 2010Photonic crystals are extremely sensitive to structural disorder even to the point of completely losing their functionalities. While on one side this can be detrimental for applications in traditional optical devices, on the other side, it gives also ... More
Entangled coherent states under dissipationJan 10 2008Aug 13 2010We study the evolution of entangled coherent states of the two quantized electromagnetic fields under dissipation. Characteristic time scales for the decay of the negativity are found in the case of large values of the phase space distance among the states ... More
Disk stars in the Milky Way detected beyond 25 kpc from its centerApr 09 2018CONTEXT. The maximum size of the Galactic stellar disk is not yet known. Some studies have suggested an abrupt drop-off of the stellar density of the disk at Galactocentric distances $R\gtrsim 15$ kpc, which means that in practice no disk stars or only ... More
Corrigendum to the chapter "Some aspects concerning the dynamics of stochastic chemostats"Oct 02 2017In this paper we correct an error made in a previous work, where a misleading stochastic system was obtained due to a lapse concerning a sign in one of the equations at the beginning of the work such that the results obtained are quite different to the ... More
Glueball Spectrum from an Effective HamiltonianOct 19 1998Apr 23 1999Using simple and general arguments we propose an effective Hamiltonian for the description of low-energy pure QCD. The Hamiltonian is a function of spatially constant collective modes. Its eigenstates can be organized into bands classified by the irreducible ... More
Bound States from Regge Trajectories in a Scalar ModelNov 29 2000The calculation of bound state properties using renormalization group techniques to compute the corresponding Regge trajectories is presented. In particular, we investigate the bound states in different charge sectors of a scalar theory with interaction ... More
High-precision analysis of binary stars with planets. I. Searching for condensation temperature trends in the HD 106515 systemApr 02 2019We explore the probable chemical signature of planet formation in the remarkable binary system HD 106515. The A star hosts a massive long-period planet with 9 MJup detected by radial velocity. We also refine stellar and planetary parameters by using non-solar-scaled ... More
$1/f^α$ noise and integrable systemsMay 14 2009An innovative test for detecting quantum chaos based on the analysis of the spectral fluctuations regarded as a time series has been recently proposed. According to this test, the fluctuations of a fully chaotic system should exhibit 1/f noise, whereas ... More
Understanding multilayers from a geometrical viewpointApr 17 2001We reelaborate on the basic properties of lossless multilayers. We show that the transfer matrices for these multilayers have essentially the same algebraic properties as the Lorentz group SO(2,1) in a (2+1)-dimensional spacetime, as well as the group ... More
Cryptanalysis of the SASI Ultralightweight RFID Authentication Protocol with Modular RotationsNov 26 2008In this work we present the first passive attack over the SASI lightweight authentication protocol with modular rotations. This can be used to fully recover the secret $ID$ of the RFID tag, which is the value the protocol is designed to conceal. The attack ... More
Preface "Nonlinear processes in oceanic and atmospheric flows"Jun 15 2010Nonlinear phenomena are essential ingredients in many oceanic and atmospheric processes, and successful understanding of them benefits from multidisciplinary collaboration between oceanographers, meteorologists, physicists and mathematicians. The present ... More
Comparison between Eulerian diagnostics and finite-size Lyapunov exponents computed from altimetry in the Algerian basinJul 24 2008Transport and mixing properties of surface currents can be detected from altimetric data by both Eulerian and Lagrangian diagnostics. In contrast with Eulerian diagnostics, Lagrangian tools like the local Lyapunov exponents have the advantage of exploiting ... More
Radial velocities in the outermost disk toward the anticenterJan 04 2019We measure the mean Galactocentric radial component of the velocity of stars ($v_R$) in the disk at 8 kpc$<R<28$ kpc in the direction of the anticenter. For this, we use the Apache Point Galactic Evolution Experiment (APOGEE). Furthermore, we compare ... More
Highly Parallel Acoustic Assembly of Microparticles into Well-Ordered Colloidal CrystallitesNov 03 2015The precise arrangement of microscopic objects is critical to the development of functional materials and ornately patterned surfaces. Here, we present an acoustics-based method for the rapid arrangement of microscopic particles into organized and programmable ... More
Updated Limits on Visibly and Invisibly Decaying Higgs Bosons from LEPMay 25 1994Talk presented at the XXIX Rencontres de Moriond, Electroweak Interactions and Unified Theories, March 12-19, 1994, Meribel
The localized chemical pollution in NGC 5253 revisited: Results from deep echelle spectrophotometrySep 18 2006We present echelle spectrophotometry of the blue compact dwarf galaxy (BCDG) NGC 5253. The data have been taken with the Very Large Telescope UVES echelle spectrograph in the 3100 to 10400 angstroms range. We have measured the intensities of a large number ... More
Nuclear Structure Functions at Small x from Inelastic Shadowing and DiffractionApr 11 2003Apr 17 2003Nuclear structure functions at small x and small or moderate $Q^2$ are studied using the relation with diffraction on nucleons which arises from Gribov's Reggeon Calculus. A reasonable description of experimental data is obtained with no fitted parameters. ... More
Preserving the 7x7 surface reconstruction of clean Si(111) by graphene adsorptionAug 10 2015We employ room-temperature ultrahigh vacuum scanning tunneling microscopy (UHV STM) and {\em ab-initio} calculations to study graphene flakes that were adsorbed onto the Si(111)$-$7$\times$7 surface. The characteristic 7$\times$7 reconstruction of this ... More
Fourier Mukai Transforms for Gorenstein SchemesJun 29 2005Sep 10 2006We extend to singular schemes with Gorenstein singularities or fibered in schemes of that kind Bondal and Orlov's criterion for an integral functor to be fully faithful. We also contemplate a criterion for equivalence. We offer a proof that is new even ... More
An XMM-Newton Study of the Mixed-Morphology Supernova Remnant G346.6-0.2Jul 28 2017We present an X-ray imaging and spectroscopic study of the molecular cloud interacting mixed-morphology (MM) supernova remnant (SNR) G346.6-0.2 using XMM-Newton. The X-ray spectrum of the remnant is well described by a recombining plasma that most likely ... More
Phenomenological viability of neutralino dark matter in the NMSSMJan 31 2007The viability of the lightest neutralino as a dark matter candidate in the Next-to-Minimal Supersymmetric Standard Model is analysed. We carry out a thorough analysis of the parameter space, taking into account accelerator constraints as well as bounds ... More
Model Independent Higgs Boson Mass Limits at LEPApr 15 1993We derive model-independent constraints on Higgs mass and couplings from associated signals for higher masses, accessible at LEP2. This work is motivated by the fact that, in many extensions of the standard model, the Higgs boson can have substantial ... More
Multi-task multiple kernel machines for personalized pain recognition from functional near-infrared spectroscopy brain signalsAug 21 2018Currently there is no validated objective measure of pain. Recent neuroimaging studies have explored the feasibility of using functional near-infrared spectroscopy (fNIRS) to measure alterations in brain function in evoked and ongoing pain. In this study, ... More
Topographic Constraints on the Origin of the Equatorial Ridge on IapetusApr 09 2014Saturn's moon Iapetus has an equatorial ridge system, which may be as high as 20 km, that may have formed by endogenic forces, such as tectonic and convective forces, or exogenic processes such as debris infall. We use high-resolution topographic data ... More
Parasitic interference in nulling interferometryMay 28 2013Nulling interferometry aims to detect faint objects close to bright stars. Its principle is to produce a destructive interference along the line-of-sight so that the stellar flux is rejected, while the flux of the off-axis source can be transmitted. In ... More
X-ray optical depth diagnostics of T Tauri accretion shocksSep 01 2009Sep 11 2009In classical T Tauri stars, X-rays are produced by two plasma components: a hot low-density plasma, with frequent flaring activity, and a high-density lower temperature plasma. The former is coronal plasma related to the stellar magnetic activity. The ... More
Inozemtsev's hyperbolic spin model and its related spin chainMay 04 2010In this paper we study Inozemtsev's su(m) quantum spin model with hyperbolic interactions and the associated spin chain of Haldane-Shastry type introduced by Frahm and Inozemtsev. We compute the spectrum of Inozemtsev's model, and use this result and ... More
The Berry-Tabor conjecture for spin chains of Haldane-Shastry typeApr 23 2008According to a long-standing conjecture of Berry and Tabor, the distribution of the spacings between consecutive levels of a "generic'' integrable model should follow Poisson's law. In contrast, the spacings distribution of chaotic systems typically follows ... More
Cryptanalysis of Song's advanced smart card based password authentication protocolNov 11 2011Song \cite{Song10} proposed very recently a password-based authentication and key establishment protocol using smart cards which attempts to solve some weaknesses found in a previous scheme suggested by Xu, Zhu, and Feng \cite{XZF09}. In this paper, we ... More
Simple Evaluation of Franck-Condon Factors and Non-Condon Effects in the Morse PotentialSep 06 2001The calculation of Franck-Condon factors between different one-dimensional Morse potential eigenstates using a formula derived from the Wigner function is discussed. Our numerical calculations using a very simple program written in Mathematica is compared ... More
Abundance Stratification of Exoplanet Host StarsOct 21 2008Dec 18 2008This paper has been withdrawn due to a copyright restrictions.