Results for "C. H. López-Caraballo"

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Impact of noise on a dynamical system: prediction and uncertainties from a swarm-optimized neural networkSep 20 2015In this study, an artificial neural network (ANN) based on particle swarm optimization (PSO) was developed for the time series prediction. The hybrid ANN+PSO algorithm was applied on Mackey--Glass chaotic time series in the short-term $x(t+6)$. The performance ... More
Molecular gas and star formation towards the IR dust bubble S24 and its environsSep 11 2015We present a multi-wavelength analysis of the infrared dust bubble S24, and its environs, with the aim of investigating the characteristics of the molecular gas and the interstellar dust linked to them, and analyzing the evolutionary status of the young ... More
A submillimeter study of the IR dust bubble S 21 and its environsNov 08 2016Based on the molecular emission in the $^{12}$CO(2-1) and $^{13}$CO(2-1) lines, and the continuum emission in the MIR and FIR towards the S21 IR dust bubble, we analyze the physical characteristics of the gas and dust linked to the nebula and the presence ... 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
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
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
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
GMRT 610 MHz observations of galaxy clusters in the ACT equatorial sampleJun 25 2018We present Giant Metrewave Radio Telescope 610 MHz observations of 14 Atacama Cosmology Telescope (ACT) equatorial clusters, including new data for nine. The sample includes 11 of 15 ACT equatorial clusters (i.e., 73\%) with $M_{500} > 5 \times 10^{14}\;M_\odot$, ... More
GMRT 610 MHz observations of galaxy clusters in the ACT equatorial sampleJun 25 2018Mar 18 2019We present Giant Metrewave Radio Telescope 610 MHz observations of 14 Atacama Cosmology Telescope (ACT) clusters, including new data for nine. The sample includes 73\% of ACT equatorial clusters with $M_{500} > 5 \times 10^{14}\;M_\odot$. We detect diffuse ... 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
Hydrogen atom in a magnetic field: electromagnetic transitions of the lowest statesNov 16 2007A detailed study of the lowest states $1s_0, 2p_{-1}, 2p_0$ of the hydrogen atom placed in a magnetic field $B\in(0-4.414\times 10^{13} {\rm G})$ and their electromagnetic transitions ($1s_{0} \leftrightarrow 2p_{-1}$ and $ 1s_{0} \leftrightarrow 2p_{0}$) ... More
The State-of-Play of Anomalous Microwave Emission (AME) ResearchFeb 22 2018Feb 26 2018Anomalous Microwave Emission (AME) is a component of diffuse Galactic radiation observed at frequencies in the range $\approx 10$-60 GHz. AME was first detected in 1996 and recognised as an additional component of emission in 1997. Since then, AME has ... More
Material laws and related uncommon phenomena in the electromagnetic response of type-II superconductors in longitudinal geometryAug 02 2011Relying on our theoretical approach for the superconducting critical state problem in 3D magnetic field configurations, we present an exhaustive analysis of the electrodynamic response for the so-called longitudinal transport problem in the slab geometry. ... More
Inversion mechanism for the transport current in type-II superconductorsMay 27 2010Feb 10 2011The longitudinal transport problem (the current is applied parallel to some bias magnetic field) in type-II superconductors is analyzed theoretically. Based on analytical results for simplified configurations, and relying on numerical studies for general ... More
Sun flux variation due to the effects of orbiting planets. Case of study of a non-compact planetary systemMay 16 2018We study the phase curves for the planets of our Solar System; which, is considered as a non-compact planetary system. We focus on modeling the small variations of the light curve, based on the three photometric effects: reflection, ellipsoidal, and Doppler ... More
General critical states in type-II superconductorsSep 12 2009The magnetic flux dynamics of type-II superconductors within the critical state regime is posed in a generalized framework, by using a variational theory supported by well established physical principles. The equivalence between the variational statement ... More
The Luminosity Function of Low-Redshift Abell Galaxy ClustersSep 07 2007We present the results from a survey of 57 low-redshift Abell galaxy clusters to study the radial dependence of the luminosity function (LF). The dynamical radius of each cluster, r200, was estimated from the photometric measurement of cluster richness, ... More
Properties of Magnetic Tongues over a Solar CycleSep 01 2016The photospheric spatial distribution of the main magnetic polarities of bipolar active regions (ARs) presents during their emergence deformations are known as magnetic tongues. They are attributed to the presence of twist in the toroidal magnetic flux-tubes ... More
On the Structure of the Global Attractor for Non-autonomous Difference Equations with Weak ConvergenceApr 28 2011The aim of this paper is to describe the structure of global attractors for non-autonomous difference systems of equations with recurrent (in particular, almost periodic) coefficients. We consider a special class of this type of systems (the so--called ... 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
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
The Counter-kink Rotation of a Non-Hale Active RegionDec 03 2014We describe the long-term evolution of a bipolar non-Hale active region which was observed from October, 1995, to January, 1996. Along these four solar rotations the sunspots and subsequent flux concentrations, during the decay phase of the region, were ... More
Constant of Motion for several one-dimensional systems and outlining the problem associated with getting their HamiltoniansFeb 05 2004The constants of motion of the following systems are deduced: a relativistic particle with linear dissipation, a no-relativistic particle with a time explicitly depending force, a no-relativistic particle with a constant force and time depending mass, ... More
Atacama Cosmology Telescope: Dusty star-forming galaxies and active galactic nuclei in the equatorial surveyMay 11 2019We present a catalog of 510 radio-loud active galactic nuclei (AGN, primarily blazars) and 287 dusty star-forming galaxies (DSFGs) detected by the Atacama Cosmology Telescope at $> 5 \sigma$ significance in frequency bands centered on 148 GHz (2 mm), ... More
Quadratic $A_1$ bounds for commutators of singular integrals with BMO functionsApr 06 2011For commutators of the form [b,T] where T is any Calderon--Zygmund operator and b is any BMO function we derive weighted quadratic type estimates in term of the A1 constant of the weight both in the Lp context or of LlogL type at the endpoint
Minimal Model for the Topology of the Critical State in Hard SuperconductorsJul 01 2003The critical state problem in type-II superconductivity is described theoretically by a direct optimization method, which allows a straightforward treatment for non idealized geometries. Based on Faraday's law and the principle of minimum entropy production, ... More
Vector magnetic hysteresis of hard superconductorsDec 15 2001Critical state problems which incorporate more than one component for the magnetization vector of hard superconductors are investigated. The theory is based on the minimization of a cost functional ${\cal C}[\vec{H}(\vec{x})]$ which weighs the changes ... More
The Atacama Cosmology Telescope: CO(J = 3 - 2) mapping and lens modeling of an ACT-selected dusty star-forming galaxyJul 24 2018We report Northern Extended Millimeter Array (NOEMA) CO($J = 3 - 2$) observations of the dusty star-forming galaxy ACT-S J0209941+001557 at $z = 2.5528$, which was detected as an unresolved source in the Atacama Cosmology Telescope (ACT) equatorial survey. ... 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
Self-similar Turing Patterns: An Anomalous diffusion consequenceAug 04 2016In this work we show that under specific anomalous diffusion conditions, chemical systems can produce well-ordered self-similar concentration patterns through a diffusion-driven instability. We also find spiral patterns and patterns with mixtures of rotational ... More
One-electron atomic-molecular ions containing Lithium in a strong magnetic fieldDec 07 2009The one-electron Li-containing Coulomb systems of atomic type $(li, e)$ and molecular type $(li, li, e)$, $(li, \alpha, e)$ and $(li, p, e)$ are studied in the presence of a strong magnetic field $B \leq 10^{7}$ a.u. in the non-relativistic framework. ... More
The hydrogen molecule $\rm{H}_{2}$ in inclined configuration in a weak magnetic fieldMar 20 2019Highly accurate variational calculations, based on a few parametric physically adequate trial function, are carried out for the hydrogen molecule \hh in inclined configuration, when the molecular axis forms an angle $\theta$ with respect to the direction ... More
Magnetic Twist and Writhe of Active Regions: On the Origin of Deformed Flux TubesNov 20 2014We study the long term evolution of a set of 22 bipolar active regions (ARs) in which the main photospheric polarities are seen to rotate one around the other during several solar rotations. We first show that differential rotation is not at the origin ... More
Major role of multielectronic K-L inter-shell resonant recombination processes in Li- to O-like ions of Ar, Fe, and KrJun 05 2013Dielectronic and higher-order resonant electron recombination processes including a K-shell excitation were systematically measured at high resolution in electron beam ion traps. Storing highly charged Ar, Fe, and Kr ions, the dependence on atomic number ... More
First Magdas Equipment In EcuadorOct 03 2013The Magnetic Data Acquisition System (MAGDAS) was installed in the protected Jerusalem Park in Malchingui-Ecuador in October of 2012, under the joint collaboration between Kyushu University of Japan and the Quito Astronomical Observatory of the National ... More
VLT/UVES observations of extremely strong intervening damped Lyman-alpha systems: Molecular hydrogen and excited carbon, oxygen and silicon at log N(HI)=22.4Feb 13 2015We present a detailed analysis of three extremely strong intervening DLAs (log N(HI)>=21.7) observed towards quasars with VLT/UVES. We measure overall metallicities of [Zn/H]~-1.2, -1.3 and -0.7 at respectively zabs=2.34 towards SDSS J2140-0321 (log N(HI) ... More
Revised Diagnostic Diagrams for Planetary NebulaeFeb 08 2006Diagnostic diagrams of electron density - excitation for a sample of 613 planetary nebulae are presented. The present extensive sample allows the definition of new statistical limits for the distribution of planetary nebulae in the log [Ha/[SII]] vs log ... More
Critical state analysis of orthogonal flux interactions in pinned superconductorsApr 29 2007We show that, based on the critical state model for flux-line pinning in hard superconductors, one can assess the magnetic moment relaxation induced by the oscillations of a perpendicular magnetic field. Our theory follows a recent proposal of using phenomenological ... More
Magnetocaloric functional properties of $Sm_{0.6}Sr_{0.4}MnO_3$ manganite due to advanced nanostructured morphologyAug 11 2015The magnetocaloric effect (MCE) is the key concept to produce new, advanced, freon-like free, low cost and environmental friendly magnetic refrigerators. Among several potential materials, $Sm_{0.6}Sr_{0.4}MnO_3$ manganite presents one of the highest ... More
Has a star enough energy to excite the thousand of modes observed with CoRoT?Dec 22 2009The recent analyses of the light curves provided by CoRoT have revealed pulsation spectra of unprecedented richness and precision, in particular, thousands of pulsating modes, and a clear distribution of amplitudes with frequency. In the community, some ... More
The hydrogen molecule $\rm{H}_{2}$ in inclined configuration in a weak magnetic fieldMar 20 2019May 14 2019Highly accurate variational calculations, based on a few-parameter, physically adequate trial function, are carried out for the hydrogen molecule \hh in inclined configuration, where the molecular axis forms an angle $\theta$ with respect to the direction ... More
Electric field in hard superconductors with arbitrary cross section and general critical current lawMar 17 2004The induced electric field $\vec{E}(\vec{x})$ during magnetic flux entry in superconductors with arbitrary cross section $\Omega$ and general critical current law, has been evaluated by integration along the vortex penetration paths. Nontrivial flux motion ... More
Molecules with a peptide link in protostellar shocks: a comprehensive study of L1157Aug 21 2014Interstellar molecules with a peptide link -NH-C(=O)-, like formamide (NH$_2$CHO), acetamide (NH$_2$COCH$_3$) and isocyanic acid (HNCO) are particularly interesting for their potential role in pre-biotic chemistry. We have studied their emission in the ... More
New examples of reducible theta divisors for some Syzygy bundlesSep 05 2018Sep 17 2018Let $C$ be a smooth complex irreducible projective curve of genus $g$ with general moduli, and let $(L,H^0(L))$ be a generated complete linear series of type $(d,r+1)$ over $C$. The syzygy bundle, denoted by $M_L$, is the kernel of the evaluation map ... 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
Stable and metastable freezing of classical correlations in qutritsApr 28 2017May 01 2017We study the dynamics of quantum and classical correlations in a two-qutrit system coupled to independent reservoirs. In particular, we addressed the differences in the dynamics of Markovian and non-Markovian regimes and show that for specific initial ... More
Considerations of automated machine learning in clinical metabolic profiling: Altered homocysteine plasma concentration associated with metformin exposureOct 09 2017With the maturation of metabolomics science and proliferation of biobanks, clinical metabolic profiling is an increasingly opportunistic frontier for advancing translational clinical research. Automated Machine Learning (AutoML) approaches provide exciting ... More
870 micron continuum observations of the bubble-shaped nebula Gum 31Jun 26 2015Jun 29 2015We are presenting here a study of the cold dust in the infrared ring nebula Gum 31. We aim at deriving the physical properties of the molecular gas and dust associated with the nebula, and investigating its correlation with the star formation in the region, ... More
The QUIJOTE experiment: project overview and first resultsApr 14 2015QUIJOTE (Q-U-I JOint TEnerife) is a new polarimeter aimed to characterize the polarization of the Cosmic Microwave Background and other Galactic and extragalactic signals at medium and large angular scales in the frequency range 10-40 GHz. The multi-frequency ... More
The QUIJOTE CMB Experiment: status and first results with the multi-frequency instrumentJan 19 2014Feb 05 2014The QUIJOTE (Q-U-I JOint Tenerife) CMB Experiment is designed to observe the polarization of the Cosmic Microwave Background and other Galactic and extragalactic signals at medium and large angular scales in the frequency range of 10-40 GHz. The first ... More
Implementation of a hybrid scheme for coherent plug-and-play quantum key distributionJun 14 2018We experimentally demonstrate a hybrid configuration for Quantum Key Distribution, that combines the simplicity of Distributed Phase Reference protocols with the self-referencing features and polarization insensitivity of the so-called Plug & Play system. ... More
Sociophysics in the mexican case (Sociofísica en el caso mexicano)Jun 25 2014The availability of electoral data in electronic format allowed to physicist and mathematicians their own analysis. Beyond theoretical models for electoral processes, new regularities had been found in the data analysis of many countries and many elections. ... More
Sectional Anosov flows: Existence of Venice masks with two singularitiesMay 21 2015We show the existence of Venice masks (i.e. nontransitive sectional Anosov flows with dense periodic orbits), containing two equilibria on certain compact 3-manifolds. Indeed, the only known examples of venice masks have one or three singularities, and ... More
On the existence and analycity of solitary waves solutions to a two-dimesional Benjamin-Ono equationMar 14 2015We show the existence, regularity and analyticity of solitary waves associated to the following equation \begin{eqnarray*} (u_t+u^{p}u_x+ \mathcal H\partial_x^2u+ \lambda \mathcal H\partial_y^2u)_x +\mu u_{yy}=0, \end{eqnarray*} where $\mathcal H$ is ... More
Polygon Matching and Indexing Under Affine TransformationsApr 18 2013Given a collection $\{Z_1,Z_2,\ldots,Z_m\}$ of $n$-sided polygons in the plane and a query polygon $W$ we give algorithms to find all $Z_\ell$ such that $W=f(Z_\ell)$ with $f$ an unknown similarity transformation in time independent of the size of the ... More
Pulsations in M dwarf starsAug 04 2011Oct 14 2011We present the results of the first theoretical non-radial non-adiabatic pulsational study of M dwarf stellar models with masses in the range 0.1 to 0.5M_solar. We find the fundamental radial mode to be unstable due to an \epsilon mechanism caused by ... More
Packing unequal rectangles and squares in a fixed size circular container using formulation space searchFeb 21 2018In this paper we formulate the problem of packing unequal rectangles/squares into a fixed size circular container as a mixed-integer nonlinear program. Here we pack rectangles so as to maximise some objective (e.g. maximise the number of rectangles packed ... More
Symplectic and Lie algebraic techniques in Geometric OpticsAug 29 1997We will show the usefulness of the tools of Symplectic and Presymplectic Geometry and the corresponding Lie algebraic methods in different problems in Geometric Optics.
On bipartite mixed graphsNov 05 2016Mixed graphs can be seen as digraphs that have both arcs and edges (or digons, that is, two opposite arcs). In this paper, we consider the case where such graphs are bipartite. As main results, we show that in this context the Moore-like bound is attained ... More
Sequence mixed graphsAug 09 2016A mixed graph can be seen as a type of digraph containing some edges (two opposite arcs). Here we introduce the concept of sequence mixed graphs, which is a generalization of both sequence graphs and iterated line digraphs. These structures are proven ... More
Exciting with Quantum Light. I. Exciting an harmonic oscillatorJan 22 2016Sep 03 2016We start a series of studies of the excitation of an optical target by quantum light. In this first part, we introduce the problematic and address the first case of interest, that of exciting the quantum harmonic oscillator, corresponding to, e.g., a ... More
Connectivity and other invariants of generalized products of graphsMay 13 2013Figueroa-Centeno et al. introduced the following product of digraphs: let $D$ be a digraph and let $\Gamma$ be a family of digraphs such that $V(F)=V$ for every $F\in \Gamma$. Consider any function $h:E(D)\longrightarrow\Gamma $. Then the product $D\otimes_{h} ... More
Antisymmetric field in string gas cosmologyJul 09 2010We study how the introduction of a 2-form field flux modify the dynamics of a T-duality invariant string gas cosmology model of Greene, Kabat and Marnerides. It induces a repulsive potential term in the effective action for the scale factor of the spacial ... More
An improved Moore bound for mixed graphs and an optimal case with diameter threeOct 01 2016A general mixed graph $G$ contains (undirected) edges and arcs (directed edges). Here we derive an improved Moore-like bound for the maximum number of vertices on a mixed graph with diameter at least three. Moreover, a complete enumeration of all optimal ... More
$F_4$ Quantum Integrable, rational and trigonometric models: space-of-orbits viewNov 27 2013Dec 15 2013Algebraic-rational nature of the four-dimensional, $F_4$-invariant integrable quantum Hamiltonians, both rational and trigonometric, is revealed and reviewed. It was shown that being written in $F_4$ Weyl invariants, polynomial and exponential, respectively, ... More
Intrinsic spin-orbit interactions in flat and curved graphene nanoribbonsSep 28 2010Recent theoretical and experimental works on carbon nanotubes and graphene samples have revealed that spin-orbit interactions, though customarily ignored in carbon-based materials, are more important and complex than it was thought. We study the intrinsic ... More
Minimal periods of semilinear evolution equations with Lipschitz nonlinearity revisitedDec 20 2012We obtain a lower bound for the period of periodic solutions of semilinear evolution equations for the full range of nonlinear terms for which standard local existence theory applies. This lower bound depends on the Lipschitz constant of the nonlinear ... More
Search of Complex Binary Cellular Automata Using Behavioral MetricsDec 06 2014Jan 16 2015We propose the characterization of binary cellular automata using a set of behavioral metrics that are applied to the minimal Boolean form of a cellular automaton's transition function. These behavioral metrics are formulated to satisfy heuristic criteria ... More
Sequence mixed graphsAug 09 2016Oct 11 2016A mixed graph can be seen as a type of digraph containing some edges (two opposite arcs). Here we introduce the concept of sequence mixed graphs, which is a generalization of both sequence graphs and iterated line digraphs. These structures are proven ... 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
Photometric Classification of quasars from RCS-2 using Random ForestMay 21 2014Aug 25 2015Aims. Construction of a new quasar candidate catalog from the Red-Sequence Cluster Survey 2 (RCS-2), identified solely from photometric information using an automated algorithm suitable for large surveys. The algorithm performance is tested using a well-defined ... More
Examination of experimental conditions for the production of proton-rich and neutron-rich hypernucleiJan 15 2016Oct 20 2016After the demonstration of the feasibility of hypernuclear spectroscopy with heavy-ion beams, the HypHI Collaboration will next focus on the study of proton- and neutron-rich hypernuclei. The use of a fragment separator for the production and separation ... More
Relaxation, Emission Modes and Limit Temperatures in Ni+Ni HICApr 04 2004A dynamical stability analysis is performed for Ni+Ni central collision at intermediate energies, showing that in chemical, thermal and dynamical equilibriums are reached at an early stage of system evolution. This is obtained by computing the relaxation ... More
Distance labelings: a generalization of Langford sequencesJun 17 2015A Langford sequence of order $m$ and defect $d$ can be identified with a labeling of the vertices of a path of order $2m$ in which each labeled from $d$ up to $d+m-1$ appears twice and in which the vertices that have been label with $k$ are at distance ... More
An improved Moore bound for mixed graphsOct 01 2016Apr 25 2018A mixed graph $G$ can contain both (undirected) edges and arcs (directed edges). Here we derive an improved Moore-like bound for the maximum number of vertices of a mixed graph with diameter at least three. Moreover, a complete enumeration of all optimal ... More
One pion production in neutrino-nucleon scattering and the different parametrizations of the weak $N\rightarrowΔ$ vertexNov 14 2013Nov 15 2013The $N \to \Delta$ weak vertex provides an important contribution to the one pion production in neutrino-nucleon and neutrino-nucleus scattering for $\pi N$ invariant masses below 1.4 GeV. Beyond its interest as a tool in neutrino detection and their ... More
The influence of antiphase boundary of the MnAl $τ$-phase on the energy productMar 15 2019In this work we use a multiscale approach toward a realistic design of a permanent magnet based on MnAl $\tau$-phase and elucidate how the antiphase boundary defects present in this material affect the energy product. We show how the extrinsic properties ... More
Chaos in convolution operators on the space of entire functions of infinitely many complex variablesJun 19 2018A classical result of Godefroy and Shapiro states that every nontrivial convolution operator on the space $\mathcal{H}(\mathbb{C}^n)$ of entire functions of several complex variables is hypercyclic. In sharp contrast with this result F\'avaro and Mujica ... 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
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
Recognition of Temporal Sequences of PatternsAug 26 1994Using an asymmetric associative network with synchronous updating, it is possible to recall a sequence of patterns. To obtain a stable sequence generation with a large storage capacity, we introduce a threshold that eliminates the contribution of weakly ... More
On the Cauchy problem of a two-dimesional Benjamin-Ono equationMar 14 2015In this work we shall show that the Cauchy problem \begin{equation} \left\{ \begin{aligned} &(u_t+u^pu_x+\mathcal H\partial_x^2u+ \alpha\mathcal H\partial_y^2u )_x - \gamma u_{yy}=0 \quad p\in{\nat} &u(0;x,y)=\phi{(x,y)} \end{aligned} \right. \end{equation} ... More
About the existence of the exotic molecular ions $(HeH)^{2+}$ and $He_2^{3+}$ in a strong magnetic fieldDec 16 2004Oct 29 2006The Coulombic systems $(\al p e)$ and $(\al\al e)$, $(\al p p e)$, $(\al \al p e)$ and $(Li^{3+} Li^{3+} e)$ placed in a magnetic field $B \gtrsim 10^{11} {G}$ are studied. It is demonstrated a theoretical existence of the exotic ion $(He H)^{2+}$ for ... More
Mapping the Galactic disk with red clump stars from LAMOST and Gaia II: 3D asymmetrical kinematics of mono-age populations in the disk between 6-14 kpcMay 28 2019We perform analysis of the three-dimensional kinematics of Milky Way disk stars in mono-age populations. We focus on stars between Galactocentric distances of $R=6$ and 14 \,kpc, selected from the combined LAMOST DR4 red clump giant stars and Gaia DR2 ... More
A new velocity substructure and time stamps of the Galactic disk asymmetry in the disk between 12-15 kpcJul 05 2019We investigate the three-dimensional asymmetrical kinematics and present time stamps of the Milky Way disk between Galactocentric distances of $R=12$ and 15 \,kpc, using red clump stars selected from the LAMOST Galactic survey, also with proper motion ... More
Universal Fluctuations in Correlated SystemsDec 14 1999The probability density function (PDF) of a global measure in a large class of highly correlated systems has been suggested to be of the same functional form. Here, we identify the analytical form of the PDF of one such measure, the order parameter in ... More
Optical spectroscopy of complex open 4$d$-shell ions Sn$^{7+}$-Sn$^{10+}$Dec 02 2016We analyze the complex level structure of ions with many-valence-electron open [Kr] 4$d^\textrm{m}$ sub-shells ($\textrm{m}$=7-4) with ab initio calculations based on configuration-interaction many-body perturbation theory (CI+MBPT). Charge-state-resolved ... More
Mapping the Galactic disk with red clump stars from LAMOST and Gaia-III:A new velocity substructure and time stamps of the Galactic disk asymmetry in the disk between 12-15 kpcJul 05 2019Jul 08 2019We investigate the three-dimensional asymmetrical kinematics and present time stamps of the Milky Way disk between Galactocentric distances of $R=12$ and 15 \,kpc, using red clump stars selected from the LAMOST Galactic survey, also with proper motion ... More
Two-dimensional Einstein manifolds in geometrothermodynamicsMar 16 2013We present a class of thermodynamic systems with constant thermodynamic curvature which, within the context of geometric approaches of thermodynamics, can be interpreted as constant thermodynamic interaction among their components. In particular, for ... More
Error characterization in Quantum Information Processing: a protocol for analyzing spatial correlations and its experimental implementationMay 30 2008Mar 14 2009We present a protocol for error characterization and its experimental implementation with 4 qubits in liquid state NMR. The method is designed to retrieve information about spatial correlations and scales as $O(n^w)$, where $w$ is the maximum number of ... More
Boson Mapping in Field TheoryNov 12 1996A boson mapping of pair field operators is presented. The mapping preserves all hermiticity properties and the Poisson bracket relations between fields and momenta. The most practical application of the boson mapping is to field theories which exhibit ... More
Entanglement of formation for a class of $(2\otimes d)$-dimensional systemsMay 31 2011Currently the entanglement of formation can be calculated analytically for mixed states in a $(2\otimes2)$-dimensional Hilbert space. For states in higher dimensional Hilbert space a closed formula for quantifying entanglement does not exist. In this ... More
Metastable decoherence-free subspace and pointer states in mesoscopic quantum systemsJan 28 2018Two initially correlated coherent states, each interacting with its own independent dissipative environment exhibit a sudden transition from classical to quantum decoherence. This change in the dynamics is a turning point in the decoherence, in the sense ... More
Geometrical aspects of isoscalingApr 12 2005The property of isoscaling in nuclear fragmentation is studied using a simple bond percolation model with ``isospin'' added as an extra degree of freedom. It is shown analytically, first, that isoscaling is expected to exist in such a simple model with ... More
The Brightest Cluster Galaxy in Abell 85: The Largest Core Known so farMay 30 2014Oct 15 2014We have found that the brightest cluster galaxy (BCG) in Abell~85, Holm 15A, displays the largest core so far known. Its cusp radius, $r_{\gamma} = 4.57 \pm 0.06$ kpc ($4.26^{\prime\prime}\pm 0.06^{\prime\prime}$), is more than 18 times larger than the ... More
Reply to Comment on "Universal Fluctuations in Correlated Systems", by B. Zheng and S. Trimper, cond-mat/0109003Sep 06 2001We reply to the comment on our published paper `` Universal Fluctuations in Correlated Systems'',Phys. Rev. Lett. Vol; 84, p3744 (2000), by B. Zheng and S. Trimper, cond-mat/0109003. We argue that their results confirm our conjecture, that the probability ... More
A maximum likelihood method for bidimensional experimental distributions, and its application to the galaxy merger fractionApr 09 2008The determination of galaxy merger fraction of field galaxies using automatic morphological indices and photometric redshifts is affected by several biases if observational errors are not properly treated. Here, we correct these biases using maximum likelihood ... More
Entanglement properties in the Inhomogeneous Tavis-Cummings modelNov 03 2006In this work we study the properties of the atomic entanglement in the eigenstates spectrum of the inhomogeneous Tavis-Cummings Model. The inhomogeneity is present in the coupling among the atoms with quantum electromagnetic field. We calculate analytical ... More
Database of novel magnetic materials for high-performance permanent magnet developmentFeb 14 2019This paper describes the open Novamag database that has been developed for the design of novel Rare-Earth free/lean permanent magnets. The database software technologies, its friendly graphical user interface, advanced search tools and available data ... More