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Results for "Josep M. Luis"

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Centimeter continuum observations of the northern head of the HH 80/81/80N jet: revising the actual dimensions of a parsec scale jetSep 06 2012We present 6 and 20 cm JVLA/VLA observations of the northern head of the HH 80/81/80N jet, one of the largest collimated jet systems known so far, aimed to look for knots further away than HH 80N, the northern head of the jet. Aligned with the jet and ... More
Disks and outflows in the massive protobinary system W3(OH)TWAug 24 2011Sensitive and high angular resolution ($\sim$ $0\rlap.{"}7$) (sub)millimeter line and continuum observations of the massive star forming region W3(OH) made with the Submillimeter Array are presented. We report the first detection of two bipolar outflows ... More
Proper motions of the outer knots of the HH 80/81/80N radio-jetOct 06 2015(abridged) The HH 80/81/80N jet extends from the HH 80 object to the recently discovered Source 34 and has a total projected jet size of 10.3 pc, constituting the largest collimated radio-jet system known so far. It is powered by IRAS 18162-2048 associated ... More
ALMA observations of the archetypal "hot core" that isn't: Orion KLAug 28 2017We present sensitive high angular resolution ($\sim$ 0.1$''$ -- 0.3$''$) continuum ALMA (The Atacama Large Millimeter/Submillimeter Array) observations of the archetypal hot core located in Orion-KL. The observations were made in five different spectral ... More
A Magnetized Jet from a Massive ProtostarNov 29 2010Synchrotron emission is commonly found in relativistic jets from active galactic nuclei (AGNs) and microquasars, but so far its presence in jets from young stellar objects (YSOs) has not been proved. Here, we present evidence of polarized synchrotron ... More
Partition of Optical Properties Into Orbital ContributionsJul 10 2019Nonlinear optical properties (NLOPs) play a major role in photonics, electro-optics and optoelectronics, and other fields of modern optics. The design of new NLO molecules and materials has benefited from the development of computational tools to analyze ... More
New Radio Continuum Observations of the Compact Source Projected Inside NGC 6334ASep 18 2013Dec 09 2013A handful of HII regions are known to exhibit a compact radio source near their centers. The nature of these compact radio sources is not well established. We present the analysis of new as well as archival Very Large Array observations of the compact ... More
Multiple monopolar outflows driven by massive protostars in IRAS 18162-2048Oct 03 2013Oct 04 2013In this paper we present Combined Array for Research in Millimeter-wave Astronomy (CARMA) 3.5 mm observations and SubMillimeter Array (SMA) 870 microns observations toward the high-mass star-forming region IRAS 1816-2048, the core of the HH 80/81/80N ... More
Haar Wavelets-Based Approach for Quantifying Credit Portfolio LossesApr 29 2009This paper proposes a new methodology to compute Value at Risk (VaR) for quantifying losses in credit portfolios. We approximate the cumulative distribution of the loss function by a finite combination of Haar wavelets basis functions and calculate the ... More
Peaks and jumps reconstruction with B-splines scaling functionsFeb 06 2013We consider a methodology based in B-splines scaling functions to numerically invert Fourier or Laplace transforms of functions in the space $L^2(\mathbb{R})$. The original function is approximated by a finite combination of $j^{th}$ order B-splines basis ... More
Dimensional reduction, truncations, constraints and the issue of consistencyOct 25 2006Nov 07 2006A brief overview of dimensional reductions for diffeomorphism invariant theories is given. The distinction between the physical idea of compactification and the mathematical problem of a consistent truncation is discussed, and the typical ingredients ... More
Stellar radio astrophysicsFeb 27 2004Radio emission has been detected from all the stages of stellar evolution across the HR Diagram. Its presence reveals both astrophysical phenomena and stellar activity which, otherwise, would not be detectable by other means. The development of large, ... More
High energy processes in microquasarsJan 26 2005Microquasars are X-ray binary stars with the capability to generate relativisticjets. It is expected that microquasars are gamma-ray sources, because of the analogy with quasars and because the theoretical models predict emission at such energy range. ... More
Substituting fields within the action: consistency issues and some applicationsSep 23 2009In field theory, as well as in mechanics, the substitution of some fields in terms of other fields at the level of the action raises an issue of consistency with respect to the equations of motion. We discuss this issue and give an expression which neatly ... More
Radio properties of Very High Energy gamma-ray sourcesJun 03 2009Radio observations of very high energy (VHE) gamma-ray sources are fundamental to identify and reveal their nature, as well as to understand the physics behind these energetic sources. I will comment on some characteristics of extragalactic sources detected ... More
On Dirac's incomplete analysis of gauge transformationsSep 16 2004Jun 02 2005Dirac's approach to gauge symmetries is discussed. We follow closely the steps that led him from his conjecture concerning the generators of gauge transformations {\it at a given time} --to be contrasted with the common view of gauge transformations as ... More
Generally covariant theories: the Noether obstruction for realizing certain space-time diffeomorphisms in phase spaceJun 09 2003Relying on known results of the Noether theory of symmetries extended to constrained systems, it is shown that there exists an obstruction that prevents certain tangent-space diffeomorphisms to be projectable to phase-space, for generally covariant theories. ... More
Investigating Particle Acceleration in Protostellar Jets: The Triple Radio Continuum Source in SerpensDec 09 2015While most protostellar jets present free-free emission at radio wavelengths, synchrotron emission has been also proposed to be present in a handful of these objects. The presence of non-thermal emission has been inferred by negative spectral indices ... More
Black Holes in the GalaxyJul 21 2009The most compelling evidences for the existence of stellar-mass black holes have been obtained through observations of X-ray binary systems. The application of classical methods and the development of new techniques have allowed us to increase the number ... More
Gamma rays from compact binary systemOct 24 2008Some of the very high energy (VHE) gamma-ray sources detected with the modern generation of Cherenkov telescopes have been identified with previously known X-ray binary systems. These detections demonstrate the richness of non-thermal phenomena in compact ... More
Noether symmetries for fields and branes in backgrounds with Killing vectorsAug 31 2017We show that Belinfante construction of an improved energy-momentum tensor can be carried over to curved backgrounds, in analogy to the case of flat spacetime. The results hold irrespective of the background being dynamical or a fixed, non-backreacting ... More
Searching for compact radio sources associated to UCHII regionsJan 10 2017Ultra-Compact (UC)HII regions represent a very early stage of massive star formation whose structure and evolution are not yet fully understood. Interferometric observations in recent years show that some UCHII regions have associated compact sources ... More
Noether symmetries, energy-momentum tensors and conformal invariance in classical field theoryFeb 27 2009In the framework of classical field theory, we first review the Noether theory of symmetries, with simple rederivations of its essential results, with special emphasis given to the Noether identities for gauge theories. Will this baggage on board, we ... More
Microquasars as high-energy gamma-ray sourcesSep 09 2004Galactic microquasars are certainly one of the most recent additions to the field of high energy astrophysics and have attracted increasing interest over the last decade. However, the high energy part of the spectrum of microquasars is the most poorly ... More
Plugging the Gauge Fixing into the LagrangianOct 09 1995A complete analysis of the consequences of introducing a set of holonomic gauge fixing constraints (to fix the dynamics) into a singular Lagrangian is performed. It is shown in general that the dynamical system originated from the reduced Lagrangian erases ... More
Gamma-ray binaries: microquasars and binary systems with pulsarJan 25 2011Several binary systems have been detected at High Energy (HE, E > 100 MeV) and/or Very High Energy (VHE, E > 100 GeV) gamma rays. Some of them are X-ray binaries in which accretion feeds relativistic radio jets and powers the non-thermal emission (i.e., ... More
AGNs and microquasars as high energy gamma-ray sourcesDec 02 2004The extragalactic analogs of the microquasars, the quasars, are strong gamma-ray emitters at GeV energies. It is expected that microquasars are also gamma-ray sources, because of the analogy with quasars and because theoretical models predict the high-energy ... More
Truncations driven by constraints: consistency and conditions for correct upliftingsJan 22 2004We discuss the mechanism of truncations driven by the imposition of constraints. We show how the consistency of such truncations is controlled, and give general theorems that establish conditions for the correct uplifting of solutions. We show in some ... More
Symmetries and infinitesimal symmetries of singular differential equationsJan 16 2002The aim of this paper is to study symmetries of linearly singular differential equations, namely, equations that can not be written in normal form because the derivatives are multiplied by a singular linear operator. The concept of geometric symmetry ... More
Singular lagrangians: some geometric structures along the Legendre mapSep 29 2000Jan 18 2002New geometric structures that relate the lagrangian and hamiltonian formalisms defined upon a singular lagrangian are presented. Several vector fields are constructed in velocity space that give new and precise answers to several topics like the projectability ... More
Probing pure Lovelock gravity by Nariai and Bertotti-Robinson solutionsOct 03 2012Nov 15 2013The product spacetimes of constant curvature describe in Einstein gravity, which is linear in Riemann curvature, Nariai metric which is a solution of $\Lambda$-vacuum when curvatures are equal, $k_1=k_2$, while it is Bertotti-Robinson metric describing ... More
Remarks on the consistency of minimal deviations from General RelativityMar 19 2010Mar 26 2010We study the consequences of the modification of the phase space structure of General Relativity imposed by breaking the full diffeomorphism invariance but retaining the time foliation preserving diffeomorphisms. We examine the different sectors in phase ... More
VLT search for the infrared counterpart of 1E 1740.7-2942Sep 27 2000Sep 29 2000We report the results of our search for the near infrared counterpart of the microquasar 1E 1740.7-2942 using the VLT (Based on observations collected at the European Southern Observatory, Chile (ESO No 63.H-0261)). For the first time, several counterpart ... More
Sampling Strategies for Path Planning under Kinematic ConstraintsJul 09 2014A well-known weakness of the probabilistic path planners is the so-called narrow passage problem, where a region with a relatively low probability of being sampled must be explored to find a solution path. Many strategies have been proposed to alleviate ... More
On the equivalence of the Einstein-Hilbert and the Einstein-Palatini formulations of general relativity for an arbitrary connectionOct 05 2010Jun 15 2012In the framework of the Einstein-Palatini formalism, even though the projective transformation connecting the arbitrary connection with the Levi Civita connection has been floating in the literature for a long time and perhaps the result was implicitly ... More
Fluctuations around classical solutions for gauge theories in Lagrangian and Hamiltonian approachNov 22 2005Jun 14 2006We analyze the dynamics of gauge theories and constrained systems in general under small perturbations around a classical solution (background) in both Lagrangian and Hamiltonian formalisms. We prove that a fluctuations theory, described by a quadratic ... More
Consistent and inconsistent truncations. Some results and the issue of the correct uplifting of solutionsSep 08 2003Nov 28 2003We clarify the existence of two different types of truncations of the field content in a theory, the consistency of each type being achieved by different means. A proof is given of the conditions to have a consistent truncation in the case of dimensional ... More
$D$-modules, Bernstein-Sato polynomials and $F$-invariants of direct summandsNov 14 2016We study the structure of $D$-modules over a ring $R$ which is a direct summand of a polynomial or a power series ring $S$ with coefficients over a field. We relate properties of $D$-modules over $R$ to $D$-modules over $S$. We show that the localization ... More
A genetic algorithm to discover flexible motifs with supportNov 16 2015Dec 05 2016Finding repeated patterns or motifs in a time series is an important unsupervised task that has still a number of open issues, starting by the definition of motif. In this paper, we revise the notion of motif support, characterizing it as the number of ... More
Broad-band Emission from Gamma-ray BinariesJan 11 2019Gamma-ray binaries (GBs) have been object of intense studies in the last decade. From an observational perspective, GBs are phenomenologically similar to most X-ray binary systems in terms of their broad-band emission across the entire electromagnetic ... More
A polynomial generalization of the power-compositions determinantJan 31 2006Let $C(n,p)$ be the set of $p$-compositions of an integer $n$, i.e., the set of $p$-tuples $\bm{\alpha}=(\alpha_1,...,\alpha_p)$ of nonnegative integers such that $\alpha_1+...+\alpha_p=n$, and $\mathbf{x}=(x_1,...,x_p)$ a vector of indeterminates. For ... More
Semi-classical string solutions for N=1 SYMJan 23 2003Jun 06 2003We study semi-classically the dynamics of string solitons in the Maldacena-Nunez background, dual in the infra-red to N=1, d=4 SYM. For closed string configurations rotating in the S^2 x R space wrapped by the stack of N D-branes we find a behavior that ... More
Steinhaus Triangles Generated by Vectors of the Canonical BasesJul 21 2017We give a method to calculate the weight of binary Steinhaus triangles generated by the vectors of the canonical basis of the vector space $\mathbb{F}_2^n$ over the field $\mathbb{F}_2$ of order $2$.
Small and Large Weights in Steinhaus TrianglesJul 19 2017Let $\{0=w_0<w_1<w_2<\ldots<w_m\}$ be the set of weights of binary Steinhaus triangles of size $n$, and let $W_i$ be the set of sequences in $\mathbb{F}_2^n$ that generate triangles of weight $w_i$. We obtain the values of $w_i$ and the corresponding ... More
Consistent Levi Civita truncation uniquely characterizes the Lovelock LagrangiansDec 08 2010Oct 07 2011We define the concept of Levi Civita truncation for a Lagrangian in the Palatini formulation with an arbitrary connection, and show that its consistency uniquely identifies the Lovelock Lagrangians.
Gauge transformations for higher-order lagrangiansSep 15 1995Noether's symmetry transformations for higher-order lagrangians are studied. A characterization of these transformations is presented, which is useful to find gauge transformations for higher-order singular lagrangians. The case of second-order lagrangians ... More
Canonical Noether symmetries and commutativity properties for gauge systemsJul 27 2000Jan 18 2002For a dynamical system defined by a singular Lagrangian, canonical Noether symmetries are characterized in terms of their commutation relations with the evolution operators of Lagrangian and Hamiltonian formalisms. Separate characterizations are given ... More
Dielectric confinement of excitons in type-I and type-II semiconductor nanorodsNov 29 2010We theoretically study the effect of the dielectric environment on the exciton ground state of CdSe and CdTe/CdSe/CdTe nanorods. We show that insulating environments enhance the exciton recombination rate and blueshift the emission peak by tens of meV. ... More
Room temperature spin Hall effect in graphene/MoS$_2$ van der Waals heterostructuresOct 30 2018Graphene is an excellent material for long distance spin transport but allows little spin manipulation. Transition metal dichalcogenides imprint their strong spin-orbit coupling into graphene via proximity effect, and it has been predicted that efficient ... More
The Highly Collimated Radio Jet of HH 80-81: Structure and Non-Thermal EmissionNov 06 2017Radio emission from protostellar jets is usually dominated by free-free emission from thermal electrons. However, in some cases, it has been proposed that non-thermal emission could also be present. This additional contribution from non-thermal emission ... More
Detection of Linearly Polarized 6.9 mm Continuum Emission from the Class 0 Young Stellar Object NGC1333 IRAS4AFeb 12 2016We report new Karl G. Jansky Very Large Array (JVLA), 0$"$.5 angular resolution observations of linearly polarized continuum emission at 6.9 mm, towards the Class 0 young stellar object (YSO) NGC1333 IRAS4A. This target source is a collapsing dense molecular ... More
Complex Organic Molecules tracing shocks along the outflow cavity in the high-mass protostar IRAS20126+4104Jan 17 2017We report on subarcsecond observations of complex organic molecules (COMs) in the high-mass protostar IRAS20126+4104 with the Plateau de Bure Interferometer in its most extended configurations. In addition to the simple molecules SO, HNCO and H2-13CO, ... More
Thermal Jeans fragmentation within 1000 AU in OMC-1SJun 14 2017Feb 20 2018We present subarcsecond 1.3 mm continuum ALMA observations towards the Orion Molecular Cloud 1 South (OMC-1S) region, down to a spatial resolution of 74 AU, which reveal a total of 31 continuum sources. We also present subarcsecond 7 mm continuum VLA ... More
Static pure Lovelock black hole solutions with horizon topology ${\bf S^{(n)} \times S^{(n)}}$Mar 03 2015May 20 2015It is well known that vacuum equation of arbitrary Lovelock order for static spacetime ultimately reduces to a single algebraic equation, we show that the same continues to hold true for pure Lovelock gravity of arbitrary order $N$ for topology ${\bf ... More
On polynomial digraphsJan 30 2006Jan 31 2006Let $\Phi(x,y)$ be a bivariate polynomial with complex coefficients. The zeroes of $\Phi(x,y)$ are given a combinatorial structure by considering them as arcs of a directed graph $G(\Phi)$. This paper studies some relationship between the polynomial $\Phi(x,y)$ ... More
Stability of racemic and chiral steady states in open and closed chemical systemsNov 19 2008The stability properties of models of spontaneous mirror symmetry breaking in chemistry are characterized algebraically. The models considered here all derive either from the Frank model or from autocatalysis with limited enantioselectivity. Emphasis ... More
The characteristic ideal of a finite, connected, regular graphJan 30 2006Let $\Phi(x,y)\in\mathbb{C}[x,y]$ be a symmetric polynomial of partial degree $d$. The graph $G(\Phi)$ is defined by taking $\mathbb{C}$ as set of vertices and the points of $\mathbb{V}(\Phi(x,y))$ as edges. We study the following problem: given a finite, ... More
On static black holes solutions in Einstein and Einstein-Gauss-Bonnet gravity with topology ${\bf SO(n) \times SO(n)}$Aug 28 2014Dec 19 2014We study static black hole solutions in Einstein and Einstein-Gauss-Bonnet gravity with product two-spheres topology, ${\bf SO(n) \times SO(n)}$, in higher dimensions. There is an unusual new feature of Gauss-Bonnet black hole that the avoidance of non-central ... More
Clifford Algebra Approach to Superenergy TensorsNov 10 1999Senovilla has recently defined an algebraic construction of a superenergy tensor T{A} from any arbitrary tensor A, by structuring it as an r-fold form. This superenergy tensor satisfies automatically the dominant superenergy property. We present a more ... More
Supergravity Dual of Noncommutative N=1 SYMSep 18 2002Sep 23 2002We construct the noncommutative deformation of the Maldacena-Nunez supergravity solution. The background describes a bound state of D5-D3 branes wrapping an S^2 inside a Calabi-Yau three-fold, and in the presence of a magnetic B-field. The dual field ... More
Modeling the magnetic field in the protostellar source NGC 1333 IRAS 4ASep 30 2008Oct 01 2008Magnetic fields are believed to play a crucial role in the process of star formation. We compare high-angular resolution observations of the submillimeter polarized emission of NGC 1333 IRAS 4A, tracing the magnetic field around a low-mass protostar, ... More
Faddeev-Jackiw approach to gauge theories and ineffective constraintsMar 26 1998The general conditions for the applicability of the Faddeev-Jackiw approach to gauge theories are studied. When the constraints are effective a new proof in the Lagrangian framework of the equivalence between this method and the Dirac approach is given. ... More
Reliable Control for Parameterized Interconnected Systems using LMI techniquesNov 10 2006This work presents the design of a reliable decentralized state feedback control for a class of uncertain interconnected polytopic continous systems. A model of failures in actuators is adopted which considers outages or partial degradation in independent ... More
Generalized Gödel universes in higher dimensions and pure Lovelock gravityMar 16 2017G\"{o}del universe is a homogeneous rotating dust with negative $\Lambda$ which is a direct product of three dimensional pure rotation metric with a line. We would generalize it to higher dimensions for Einstein and pure Lovelock gravity with only one ... More
Periodic radio morphology of gamma-ray binariesJun 12 2013Gamma-ray binaries allow us to study physical processes such as particle acceleration up to very-high energies and gamma-ray emission and absorption with changing geometrical configurations on a periodic basis. These sources produce outflows of radio-emitting ... More
The effect of aqueous alteration and metamorphism in the survival of presolar silicate grains in chondritesDec 01 2009Relatively small amounts (typically between 2-200 parts per million) of presolar grains have been preserved in the matrices of chondritic meteorites. The measured abundances of the different types of grains are highly variable from one chondrite to another, ... More
Positivity and conservation of superenergy tensorsOct 09 2001Feb 25 2002Two essential properties of energy-momentum tensors T_{\mu\nu} are their positivity and conservation. This is mathematically formalized by, respectively, an energy condition, as the dominant energy condition, and the vanishing of their divergence \nabla^\mu ... More
Thermodynamical universality of the Lovelock black holesOct 03 2011The necessary and sufficient condition for the thermodynamical universality of the static spherically symmetric Lovelock black hole is that it is the pure Lovelock {\Lambda}-vacuum solution. By universality we mean the thermodynamical parameters: temperature ... More
A dynamical model describing stock market price distributionsMar 22 2000High frequency data in finance have led to a deeper understanding on probability distributions of market prices. Several facts seem to be well stablished by empirical evidence. Specifically, probability distributions have the following properties: (i) ... More
Divide and Conquer: Partitioning Online Social NetworksMay 29 2009Online Social Networks (OSNs) have exploded in terms of scale and scope over the last few years. The unprecedented growth of these networks present challenges in terms of system design and maintenance. One way to cope with this is by partitioning such ... More
Kinodynamic Planning on Constraint ManifoldsMay 22 2017This paper presents a motion planner for systems subject to kinematic and dynamic constraints. The former appear when kinematic loops are present in the system, such as in parallel manipulators, in robots that cooperate to achieve a given task, or in ... More
Looking for energy in demographic data; how to detect self-organization in human population distributionMar 01 2016In the present work we study the relationship between population allocation and the combined effects of urban size and energy consumption, for two given areas and through a major part of the twentieth century. Along these lines a general application model ... More
On the static Lovelock black holesJan 20 2012May 28 2013We consider static spherically symmetric Lovelock black holes and generalize the dimensionally continued black holes in such a way that they asymptotically for large r go over to the d-dimensional Schwarzschild black hole in dS/AdS spacetime. This means ... More
Dynamics of Carroll StringsMay 18 2016May 30 2016We construct the canonical action of a Carroll string doing the Carroll limit of a canonical relativistic string. We also study the Killing symmetries of the Carroll string, which close under an infinite dimensional algebra. The tensionless limit and ... More
Observers with constant proper acceleration, constant proper jerk, and beyondNov 15 2018Mar 13 2019We discuss in Minkowski spacetime the differences between the concepts of constant proper $n$-acceleration and of vanishing $(n+1)$-acceleration. By $n$-acceleration we essentially mean the higher order time derivatives of the position vector of the trajectory ... More
Early stages of cluster formation: fragmentation of massive dense cores down to ~1000 AUNov 12 2012In order to study the fragmentation of massive dense cores, which constitute the cluster cradles, we observed with the PdBI in the most extended configuration the continuum at 1.3 mm and the CO(2-1) emission of four massive cores. We detect dust condensations ... More
Non-linear Realizations, Goldstone bosons of broken Lorentz rotations and effective actions for p-branesMay 07 2012Mar 04 2013We consider the non-linear realizations of the Poincare group for p-branes with local subgroup SO(1,p)*SO(D-(p+1)). The Nambu-Goto p-brane action is constructed using the Maurer Cartan forms of the unbroken translations. We perform a throughout phase ... More
gamma-ray emission from microquasars: a numerical model for LSI+61 303Jul 01 2004We explore the possible association between the microquasar LSI+61 303 and the EGRET source 2CG 135+01/3EG J0241$+$6103 by studying, with a detailed numerical model, whether this system can produce the emission and the variability detected by EGRET ($>$100 ... More
Chiral autocatalysis: reaction noise, micro-reversibility and chiral inhibition in mirror symmetry breakingJan 16 2016Applying the constraints dictated by the principle of detailed balance, we analyze a recent proposal for spontaneous mirror symmetry breaking (SMSB) based on enantioselective autocatalysis coupled to a linear decay of the enantiomers and in the presence ... More
Equivalence of Faddeev-Jackiw and Dirac approaches for gauge theoriesOct 09 1996The equivalence between the Dirac method and Faddeev-Jackiw analysis for gauge theories is proved. In particular we trace out, in a stage by stage procedure, the standard classification of first and second class constraints of Dirac's method in the F-J ... More
Effect of band-filling and structural distortions on the Curie temperature of Fe-Mo double perovkitesApr 28 2003By means of high resolution neutron powder diffraction at low temperature we have characterized the structural details of $\rm La_{x}Sr_{2-x}FeMoO_6$ ($0\leq {\rm x}\leq 0.5$) and $\rm Ca_{x}Sr_{2-x}FeMoO_6$ ($0\leq {\rm x}\leq 0.6$) series of compounds. ... More
Intermediate-mass hot cores at 500 AU: disks or outflows?Sep 26 2011Oct 04 2011Observations with the Plateau de Bure Interferometer in the most extended configuration toward two intermediate-mass star-forming regions, IRAS22198+6336 and AFGL5142, reveal the presence of several complex organic molecules at ~500 AU scales, confirming ... More
The molecular emission of the irradiated star forming core ahead of HH 80NJan 26 2009We present a Berkeley-Illinois-Maryland Association (BIMA) Array molecular survey of the star forming core ahead of HH 80N, the optically obscured northern counterpart of the Herbig-Haro objects HH 80/81. Continuum emission at 1.4 mm and 8 micron is detected ... More
Comparison of the atomic level structure of the plastic crystalline and the liquid phases of CBr2Cl2: neutron diffraction and Reverse Monte Carlo modelingMay 29 2013Neutron diffraction results obtained for plastic crystalline dichlorodibromomethane (CBr2Cl2) have been modelled by means of the Reverse Monte Carlo method. Comparison with its liquid phase is provided at several levels of the atomic structure (total ... More
The population of radio sources in the field of the unidentified gamma-ray source TeV J2032+4130Nov 29 2006TeV J2032+4130 is the first extended very high energy gamma-ray source, which has remained enigmatic since its discovery, due to the lack of identification. We report here deep radio observations covering the TeV J2032+4130 field and revealing for the ... More
Shaping Communities out of TrianglesJul 26 2012Community detection has arisen as one of the most relevant topics in the field of graph data mining due to its importance in many fields such as biology, social networks or network traffic analysis. The metrics proposed to shape communities are generic ... More
Deep radio images of the HEGRA and Whipple TeV sources in the Cygnus OB2 regionMay 25 2007Context. The modern generation of Cherenkov telescopes has revealed a new population of gamma-ray sources in the Galaxy. Some of them have been identified with previously known X-ray binary systems while other remain without clear counterparts a lower ... More
Interferometric observations of nitrogen-bearing molecular species in the star-forming core ahead of HH 80NJul 02 2013Jul 10 2013We present VLA NH3 and PdBI NH2D and H13NC observations of the star forming core ahead of HH 80N, the optically obscured northern counterpart of the Herbig-Haro objects HH 80/81. The main goal is to determine the kinematical information of the high density ... More
Ground state octupole correlation energies with effective forcesAug 29 2014Jan 28 2015The ground state octupole correlation energy is computed with the D1M variant of the Gogny force in different theoretical frameworks and analyzed in detail. First I consider the correlation energy gained at the mean field level by breaking reflection ... More
The sign of the overlap of HFB wave functionsJan 21 2009The problem of how to compute accurately and efficiently the sign of the overlap between two general HFB wave functions is addressed. The results obtained can easily be extrapolated to the evaluation of the sign of the trace of a density operator exponential ... More
Outer approximation method for constrained composite fixed point problems involving Lipschitz pseudo contractive operatorsJan 07 2011We propose a method for solving constrained fixed point problems involving compositions of Lipschitz pseudo contractive and firmly nonexpansive operators in Hilbert spaces. Each iteration of the method uses separate evaluations of these operators and ... More
Periodic solutions with nonconstant sign in Abel equations of the second kindApr 04 2011The study of periodic solutions with constant sign in the Abel equation of the second kind can be made through the equation of the first kind. This is because the situation is equivalent under the transformation $x\mapsto x^{-1}$, and there are many results ... More
A Douglas-Rachford Splitting Method for Solving Equilibrium ProblemsOct 07 2011Jun 27 2012We propose a splitting method for solving an equilibrium problem involving the sum of two bifunctions satisfying standard conditions. We prove that this problem is equivalent to find a zero of two appropriate maximally monotone operators. Our algorithm ... More
Forward-Douglas-Rachford splitting and forward-partial inverse method for solving monotone inclusionsDec 24 2012We provide two weakly convergent algorithms for finding a zero of the sum of a maximally monotone operator, a cocoercive operator, and the normal cone to a closed vector subspace of a real Hilbert space. The methods exploit the intrinsic structure of ... More
GRS 1758-258: the first winged microquasarJan 23 2018The family links between radio galaxies and microquasars have been strongly strengthened thanks to a new common phenomenon: the presence of extended winged features. The first detection of such structures in a Galactic microquasar, recently reported in ... More
Forward--partial inverse--forward splitting for solving monotone inclusionsJun 24 2014In this paper we provide a splitting method for finding a zero of the sum of a maximally monotone operator, a lipschitzian monotone operator, and a normal cone to a closed vectorial subspace of a real Hilbert space. The problem is characterized by a simpler ... More
WhoTracks .Me: Shedding light on the opaque world of online trackingApr 24 2018Apr 25 2019Online tracking has become of increasing concern in recent years, however our understanding of its extent to date has been limited to snapshots from web crawls. Previous at-tempts to measure the tracking ecosystem, have been done using instrumented measurement ... More
880 $μ$m SMA polarization observations of the quasar 3C 286Aug 22 2016Sep 30 2016For decades, the bright radio quasar 3C 286 has been widely recognized as one of the most reliable polarization calibrators at centimeter wavelengths because of its unchanging polarization position angle and high polarization percentage. However, it has ... More
A consensus-based secondary control layer for stable current sharing and voltage balancing in DC microgridsMar 11 2016Nov 18 2017In this paper, we propose a secondary consensus-based control layer for current sharing and voltage balancing in DC microGrids (mGs). To this purpose, we assume that Distributed Generation Units (DGUs) are equipped with decentralized primary controllers ... More
Counter-propagating dual-trap optical tweezers based on linear momentum conservationJul 02 2013We present a dual-trap optical tweezers setup which directly measures forces using linear momentum conservation. The setup uses a counter-propagating geometry, which allows momentum measurement on each beam separately. The experimental advantages of this ... More