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From nominal to higher-order rewriting and back againSep 17 2015Dec 11 2015We present a translation function from nominal rewriting systems (NRSs) to combinatory reduction systems (CRSs), transforming closed nominal rules and ground nominal terms to CRSs rules and terms, respectively, while preserving the rewriting relation. ... More

Dipolar and Quadrupolar Excitons Coupled to a Nanoparticle-on-a-Mirror CavityMay 23 2019We investigate plasmon-emitter interactions in a nanoparticle-on-a-mirror cavity. We consider two different sorts of emitters, those that sustain dipolar transitions, and those hosting only quadrupolar, dipole-inactive, excitons. By means of a fully analytical ... More

Effect of surfactant concentration on the responsiveness of a thermoresponsive copolymer/surfactant mixture with potential application on Smart foams formulationsJul 08 2017We studied a system formed by a mixture of a thermoresponsive negatively charged graft copolymer (Alg-g-PNIPAAm) with a brush-type structure, and an oppositely charged surfactant (DTAB), in bulk and at the air-solution interface. We performed experiments ... More

Cavity-modified exciton dynamics in photosynthetic unitsMay 22 2019Jun 10 2019Recently, exciton-photon strong coupling has been proposed as a means to control and enhance energy transfer in ensembles of organic molecules. Here, we demonstrate that the exciton dynamics in an archetypal purple bacterial photosynthetic unit, composed ... More

Surface second-harmonic from metallic nanoparticle configurations - a transformation optics approachMar 18 2019We study surface second-harmonic generation (SHG) from a singular plasmonic structure consisting of touching metallic wires. We use the technique of transformation optics and relate the structure to a rather simpler geometry, a slab waveguide. This allows ... More

Study of multi-neutron emission in the $β$-decay of $^{11}$LiJun 11 2019The kinematics of two-neutron emission following the $\beta$-decay of $^{11}$Li was investigated for the first time by detecting the two neutrons in coincidence and by measuring their angle and energy. An array of liquid-scintillator neutron detectors ... More

Extensions of the time-dependent density functional based tight-binding approachFeb 14 2013The time-dependent density functional based tight-binding (TD-DFTB) approach is generalized to account for fractional occupations. In addition, an on-site correction leads to marked qualitative and quantitative improvements over the original method. Especially, ... More

Vaccination with Leishmania mexicana LPG induces PD-1 in CD8+ and PD-L2 in macrophages thereby suppressing the immune response: A model to assess vaccine efficacyApr 29 2019Leishmania lipophosphoglycan is a molecule that has been used as a vaccine candidate, with contradictory results. Since unsuccessful protection could be related to suppressed T cell responses, we analyzed the expression of inhibitory receptor PD-1 in ... More

Bloch-like oscillations in a one-dimensional lattice with long-range correlated disorderSep 18 2003Feb 05 2004We study the dynamics of an electron subjected to a uniform electric field within a tight-binding model with long-range-correlated diagonal disorder. The random distribution of site energies is assumed to have a power spectrum $S(k) \sim 1/k^{\alpha}$ ... More

Corral Framework: Trustworthy and Fully Functional Data Intensive Parallel Astronomical PipelinesJan 19 2017Aug 07 2017Data processing pipelines represent an important slice of the astronomical software library that include chains of processes that transform raw data into valuable information via data reduction and analysis. In this work we present Corral, a Python framework ... More

Re-examining the transition into the N=20 island of inversion: structure of $^{30}$MgFeb 27 2018Intermediate energy single-neutron removal from $^{31}$Mg has been employed to investigate the transition into the N=20 island of inversion. Levels up to 5~MeV excitation energy in $^{30}$Mg were populated and spin-parity assignments were inferred from ... More

On the maximum number of isosceles right triangles in a finite point setFeb 25 2011Let $Q$ be a finite set of points in the plane. For any set $P$ of points in the plane, $S_{Q}(P)$ denotes the number of similar copies of $Q$ contained in $P$. For a fixed $n$, Erd\H{o}s and Purdy asked to determine the maximum possible value of $S_{Q}(P)$, ... More

Thermal tuners on a Silicon Nitride platformApr 11 2016In this paper, the design trade-offs for the implementation of small footprint thermal tuners on silicon nitride are presented, and explored through measurements and supporting simulations of a photonic chip based on Mach-Zehnder Interferometers. Firstly, ... More

Ando-Choi-Effros liftings for regular maps between Banach latticesMar 06 2019The Ando-Choi-Effros lifting theorem provides conditions under which a bounded linear mapping taking values in a quotient space can be lifted through the quotient map. We prove two versions of said theorem for regular maps between Banach lattices. Our ... More

Two Mayer-Vietoris spectral sequences for $\mathcal{D}$-modulesNov 07 2013May 30 2014We provide two Mayer-Vietoris-like spectral sequences related to the localization over the complement of a closed subvariety of an algebraic variety by using techniques from $\mathcal{D}$-modules and homological algebra. We also give, as an application ... More

A posteriori error analysis for a boundary element method with non-conforming domain decompositionJul 27 2013We present and analyze an a posteriori error estimator based on mesh refinement for the solution of the hypersingular boundary integral equation governing the Laplacian in three dimensions. The discretization under consideration is a non-conforming domain ... More

Computing in Coq with Infinite Algebraic Data StructuresApr 28 2010Computational content encoded into constructive type theory proofs can be used to make computing experiments over concrete data structures. In this paper, we explore this possibility when working in Coq with chain complexes of infinite type (that is to ... More

Irregular hypergeometric D-modulesJun 18 2009Jul 15 2009We study the irregularity of hypergeometric D-modules $\mathcal{M}_A (\beta )$ via the explicit construction of Gevrey series solutions along coordinate subspaces in $X =\mathbb{C}^n$. As a consequence, we prove that along coordinate hyperplanes the combinatorial ... More

On the local monodromy of A-hypergeometric functions and some monodromy invariant subspacesJul 15 2016Jan 25 2019We obtain an explicit formula for the characteristic polynomial of the local monodromy of $A$-hypergeometric functions with respect to small loops around a coordinate hyperplane $x_i =0$. This formula is similar to the one obtained by Ando, Esterov and ... More

Broken mirror symmetry in $^{36}$S and $^{36}$CaSep 13 2018Shape coexistence is an ubiquitous phenomenon in the neutron-rich nuclei belonging to (or sitting at the shores of) the $N=20$ Island of Inversion (IoI). Exact isospin symmetry predicts the same behaviour for their mirrors and the existence of a proton-rich ... More

Irregular Hodge filtration of some confluent hypergeometric systemsJul 11 2017Dec 10 2018We determine the irregular Hodge filtration, as introduced by Sabbah, for the purely irregular hypergeometric $\mathcal{D}$-modules. We obtain in particular a formula for the irregular Hodge numbers of these systems. We use the reduction of hypergeometric ... More

Non-equilibrium coherent vortex states and subharmonic giant Shapiro steps in Josephson junction arraysJul 11 1994This is a review of recent work on the dynamic response of Josephson junction arrays driven by dc and ac currents. The arrays are modeled by the resistively shunted Josephson junction model, appropriate for proximity effect junctions, including self-induced ... More

Nanosecond pulsed proton beam: upgrade of the accelerator-based neutron facility HiSPANOS at CNA (Spain)Jun 12 2019The 3 MV Tandem Pelletron accelerator at the Spanish Accelerator Laboratory (CNA) has been recently upgraded to produce pulsed ion beams for neutron Time-Of-Flight (TOF) measurements. The upgrade has consisted of two actions: a pulsing system installed ... More

Observations of the first electromagnetic counterpart to a gravitational wave source by the TOROS collaborationOct 16 2017We present the results of prompt optical follow-up of the electromagnetic counterpart of the gravitational-wave event GW170817 by the Transient Optical Robotic Observatory of the South Collaboration (TOROS). We detected highly significant dimming in the ... More

Asymptotic normality and greatest common divisorsFeb 10 2013May 08 2013We report on some statistical regularity properties of greatest common divisors: for large random samples of integers, the number of coprime pairs and the average of the gcd's of those pairs are approximately normal, while the maximum of those gcd's (appropriately ... More

Polynomial inequalities on the $π/4$-circle sectorMar 23 2015A number of sharp inequalities are proved for the space ${\mathcal P}\left(^2D\left(\frac{\pi}{4}\right)\right)$ of 2-homogeneous polynomials on ${\mathbb R}^2$ endowed with the supremum norm on the sector $D\left(\frac{\pi}{4}\right):=\left\{e^{i\theta}:\theta\in ... More

On the optimality of the hypercontractivity of the complex Bohnenblust--Hille inequalityJan 08 2013Feb 11 2015The main motivation of this paper is the following open problem: Is the hypercontractivity of the \emph{complex} polynomial Bohnenblust--Hille inequality an optimal result? We show that the solution to this problem has a close connection with the searching ... More

A geometric technique to generate lower estimates for the constants in the Bohnenblust--Hille inequalitiesMar 05 2012Sep 11 2013The Bohnenblust--Hille (polynomial and multilinear) inequalities were proved in 1931 in order to solve Bohr's absolute convergence problem on Dirichlet series. Since then these inequalities have found applications in various fields of analysis and analytic ... More

Embedding Population Dynamics Models in InferenceAug 28 2007Increasing pressures on the environment are generating an ever-increasing need to manage animal and plant populations sustainably, and to protect and rebuild endangered populations. Effective management requires reliable mathematical models, so that the ... More

Spectral analysis of magnetic fields in simulated galaxy clustersOct 18 2018We introduce a new sample of galaxy clusters obtained from a cosmological simulation covering an unprecedented dynamical range. All the clusters in our sample show a clear signature of small-scale dynamo amplification. We show that it is possible to use ... More

Proceedings Ninth International Workshop on Reduction Strategies in Rewriting and ProgrammingJan 26 2010This volume contains selected papers presented at the 9th International Workshop on Reduction Strategies in Rewriting and Programming, WRS2009, which was held in Brasilia on the 28th June 2009, associated to RTA 2009 (the 20th International Conference ... More

On the real polynomial Bohnenblust-Hille inequalitySep 20 2012Dec 05 2013It was recently proved by Bayart et al. that the complex polynomial Bohnenblust--Hille inequality is subexponential. We show that, for real scalars, this does no longer hold. Moreover, we show that, if $D_{\mathbb{R},m}$ stands for the real Bohnenblust--Hille ... More

Three-Dimensional Simulations of SASI- and Convection-Dominated Core-Collapse SupernovaeApr 29 2015Jul 01 2015We investigate the effect of dimensionality on the transition to explosion in neutrino-driven core-collapse supernovae. Using parameterized hydrodynamic simulations of the stalled supernova shock in one-, two- (2D), and three spatial dimensions (3D), ... More

The Kontsevich-Rosenberg principle for bi-symplectic formsAug 08 2017In this expository note, we explain the so-called Van den Bergh functor, which enables the formalization of the Kontsevich-Rosenberg principle, whereby a structure on an associative algebra has geometric meaning if it induces standard geometric structures ... More

The challenge of detecting intracluster filaments with Faraday RotationNov 27 2018The detection of filaments in the cosmic web will be crucial to distinguish between the possible magnetogenesis scenarios and future large polarization surveys will be able to shed light on their magnetization level. In this work, we use numerical simulations ... More

Circumbinary Planets Orbiting the Rapidly Pulsating Subdwarf B-type binary NY VirDec 19 2011We report here the tentative discovery of a Jovian planet in orbit around the rapidly pulsating subdwarf B-type (sdB-type) eclipsing binary NY Vir. By using new determined eclipse times together with those collected from the literature, we detect that ... More

Ruelle operator and transcendental entire mapsJan 21 2002If $f$ is a transcendental entire function with only algebraic singularities we calculate the Ruelle operator of $f$. Moreover, we prove both (i) if $f$ has a summable critical point, then $f$ is not structurally stable under certain topological conditions ... More

Simulating the DNA String Graph in Succinct SpaceJan 29 2019Converting a set of sequencing reads into a lossless compact data structure that encodes all the relevant biological information is a major challenge. The classical approaches are to build the string graph or the de Bruijn graph. Each has advantages over ... More

Mesoscopic fluctuations in biharmonically driven flux qubitsOct 24 2016We investigate flux qubits driven by a biharmonic magnetic signal, with a phase lag that acts as an effective time reversal broken parameter. The driving induced transition rate between the ground and the excited state of the flux qubit can be thought ... More

Lineability in sequence and function spacesJul 16 2015It is proved the existence of large algebraic structures \break --including large vector subspaces or infinitely generated free algebras-- inside, among others, the family of Lebesgue measurable functions that are surjective in a strong sense, the family ... More

Signatures of a 4$π$-periodic supercurrent in the voltage response of capacitively shunted topological Josephson junctionsMar 27 2017Mar 28 2017We investigate theoretical aspects of the detection of Majorana bound states in Josephson junctions using the semiclassical RCSJ model of junction dynamics. The influence of a 4$\pi$-periodic supercurrent contribution can be detected through its effect ... More

Deep Learning Identifies High-z Galaxies in a Central Blue Nugget Phase in a Characteristic Mass RangeApr 19 2018We use machine learning to identify in color images of high-redshift galaxies an astrophysical phenomenon predicted by cosmological simulations. This phenomenon, called the blue nugget (BN) phase, is the compact star-forming phase in the central regions ... More

CAFE2: an upgrade to the CAFE high-resolution spectrograph. Commissioning results and new public pipelineJun 10 2019The Calar Alto Fiber-fed \'Echelle spectrograph (CAFE) is a high-resolution spectrographs with high-precision radial velocity capabilities mounted in the 2.2m telescope of Calar Alto Observatory. It suffered from strong degradation after 4 years of operations ... More

Maximum Likelihood Estimation of Nonnegative Trigonometric Sum Models Using a Newton-like Algorithm on ManifoldsOct 28 2010In Fern\'andez-Dur\'an (2004), a new family of circular distributions based on nonnegative trigonometric sums (NNTS models) is developed. Because the parameter space of this family is the surface of the hypersphere, an efficient Newton-like algorithm ... More

Dynamical evolution of magnetic fields in the intracluster mediumMar 26 2019We investigate the evolution of magnetic fields in galaxy clusters starting from constant primordial fields using highly resolved ($\approx \rm 4 ~kpc$) cosmological MHD simulations. The magnetic fields in our sample exhibit amplification via a small-scale ... More

Plasmon-enhanced generation of non-classical lightSep 19 2018Strong light-matter interactions enabled by surface plasmons have given rise to a wide range of photonic, optoelectronic and chemical functionalities. In recent years, the interest in this research area has focused on the quantum regime, aiming to developing ... More

Nonequilibrium structures and dynamic transitions in driven vortex lattices with disorderSep 27 2006We review our studies of elastic lattices driven by an external force $F$ in the presence of random disorder, which correspond to the case of vortices in superconducting thin films driven by external currents. Above a critical force $F_c$ we find two ... More

Local quasinilpotence and common invariant subspacesSep 04 2006In this article we obtain some positive results about the existence of a common nontrivial invariant subspace for $N$-tuples of not necessarily commuting operators on Banach spaces with a Schauder basis. The concept of joint quasinilpotence plays a basic ... More

The Milnor-Moore theorem for $L_\infty$ algebras in rational homotopy theoryApr 29 2019We give a construction of the universal enveloping $A_\infty$ algebra of a given $L_\infty$ algebra, alternative to the already existing versions. As applications, we derive a higher homotopy algebras version of the classical Milnor-Moore theorem, proposing ... More

An 8-dimensional non-formal simply connected symplectic manifoldJun 22 2005Jan 30 2007A non-formal simply connected compact symplectic manifold of dimension 8 is constructed.

Nilmanifolds with a calibrated G_2-structureAug 04 2010Mar 31 2011We introduce obstructions to the existence of a calibrated G_2-structure on a Lie algebra g of dimension seven, not necessarily nilpotent. In particular, we prove that if there is a Lie algebra epimorphism from g to a six-dimensional Lie algebra h with ... More

Hindman's Theorem is only a countable phenomenonJun 18 2015Oct 04 2016We pursue the idea of generalizing Hindman's Theorem to uncountable cardinalities, by analogy with the way in which Ramsey's Theorem can be generalized to weakly compact cardinals. But unlike Ramsey's Theorem, the outcome of this paper is that the natural ... More

The universal zeta function for curve singularities and its relation with global zeta functionsMar 02 2017The purpose of this note is to give a brief overview on zeta functions of curve singularities and to provide some evidences on how these and global zeta functions associated to singular algebraic curves over perfect fields relate to each other.

Higher-order port-graph rewritingNov 17 2012The biologically inspired framework of port-graphs has been successfully used to specify complex systems. It is the basis of the PORGY modelling tool. To facilitate the specification of proof normalisation procedures via graph rewriting, in this paper ... More

$A_\infty$ structures and Massey productsMay 19 2017Jan 11 2018We study the relationship between the higher Massey products on the cohomology $H$ of a differential graded algebra, and the $A_\infty$ structures induced on $H$ via homotopy transfer techniques.

Strongly Summable Ultrafilters, Union Ultrafilters, and the Trivial Sums PropertyJun 23 2013May 14 2015We answer two questions of Hindman, Stepr\=ans and Strauss, namely we prove that every strongly summable ultrafilter on an abelian group is sparse and has the trivial sums property. Moreover we show that in most cases the sparseness of the given ultrafilter ... More

Einstein almost cokähler manifoldsSep 15 2014Jan 08 2016We study an odd-dimensional analogue of the Goldberg conjecture for compact Einstein almost K\"ahler manifolds. We give an explicit non-compact example of an Einstein almost cok\"ahler manifold that is not cok\"ahler. We prove that compact Einstein almost ... More

Classification of Nilsoliton metrics in dimension sevenNov 17 2013The aim of this paper is to classify Ricci soliton metrics on $7$-dimensional nilpotent Lie groups. It can be considered as a continuation of our paper in [Transformation Groups, Volume 17, Number 3 (2012), 639--656]. To this end, we use the classification ... More

Curvettes and clusters of infinitely near pointsMar 30 2009Jul 03 2011The aim of this paper is to revise the theory of clusters of infinitely near points for arbitrary fields. We describe in particular the intersection matrix of such a cluster, we introduce the notion of curvette over an arbitrary field and we relate it ... More

On Normal Forms of Singular Levi-Flat Real Analytic HypersurfacesMar 25 2010Aug 04 2010Let $F(z)=\mathcal{R}e(P(z)) + h.o.t$ be such that $M=(F=0)$ defines a germ of real analytic Levi-flat at $0\in\mathbb{C}^{n}$, $n\geq{2}$, where $P(z)$ is a homogeneous polynomial of degree $k$ with an isolated singularity at $0\in\mathbb{C}^{n}$ and ... More

On the contribution of different coupling constants in the infrared properties of Yang-Mills theoryJun 04 2019We investigate the influence of the different vertices in the infrared regime of two-point correlation functions of Yang-Mills theory in Landau-gauge. This regime is studied using perturbation theory within a phenomenological massive model. We perform ... More

Static Enforcement of Role-Based Access ControlSep 09 2014We propose a new static approach to Role-Based Access Control (RBAC) policy enforcement. The static approach we advocate includes a new design methodology, for applications involving RBAC, which integrates the security requirements into the system's architecture. ... More

Pile-up corrections in laser-driven pulsed x-ray sourcesNov 22 2016May 31 2018A formalism for treating the pile-up produced in solid-state detectors by laser-driven pulsed x-ray sources has been developed. It allows the direct use of x-ray spectroscopy without artificially decreasing the number of counts in the detector, assuming ... More

An estinatiion for the essential norm of Compositiion operators acting on Bloch-type spacesJan 13 2013Let \mu be any weight function defined on the unit disk $\Bbb D$ and let $\phi$ be an analytic self-map of $\Bbb D$. In the present paper we show that the essential norm of composition operator $C_\phi$ mapping from the $\alpha$-Bloch space, with $\alpha ... More

Versions of the Central Sets Theorem with higher degree termsNov 03 2017Jun 12 2018We explain how Furstenberg's Central Sets Theorem can be seen as a Ramsey-theoretic result that provides us, given a specific colouring of $\mathbb N$, with a specific sequence of polynomials of degree one satisfying certain strong monochromaticity condition. ... More

The Lagrangian structure of the Vlasov-Poisson system in domains with specular reflectionDec 04 2017Aug 27 2018In this work, we deal with the Vlasov-Poisson system in smooth physical domains with specular boundary condition, under mild integrability assumptions, and $d \ge 3$. We show that the Lagrangian and Eulerian descriptions of the system are also equivalent ... More

Alzheimer's Disease Diagnosis Based on Cognitive Methods in Virtual Environments and Emotions AnalysisOct 25 2018Dementia is a syndrome characterised by the decline of different cognitive abilities. Alzheimer's Disease (AD) is the most common dementia affecting cognitive domains such as memory and learning, perceptual-motion or executive function. High rate of deaths ... More

Best proximity points for proximal contractionsJul 18 2012In this paper we improve and extend some best proximity point results concerning the so-called proximal contractions. Specifically, compactness assumptions under the sets A and B are removed to consider completeness conditions instead.

Hypermassive Neutron Star Disk Outflows and Blue KilonovaeNov 21 2018We study mass ejection from accretion disks around newly-formed hypermassive neutron stars (HMNS). Standard kilonova model fits to GW170817 require at least a lanthanide-poor ('blue') and lanthanide-rich ('red') component. The existence of a blue component ... More

Assembling the Proofs of Ordered Model TransformationsFeb 21 2013In model-driven development, an ordered model transformation is a nested set of transformations between source and target classes, in which each transformation is governed by its own pre and post- conditions, but structurally dependent on its parent. ... More

Parameter redundancy in Type III functional response models with consumer interferenceAug 02 2018The consumption rate is a process critically important for the stability of consumer-resource systems and the persistence, sustainability and biodiversity of complex food webs. Its mathematical description in the form of functional response equations ... More

Proceedings Fourth International Workshop on LinearityJan 17 2017This volume contains the papers presented at LINEARITY 2016, the Fourth International Workshop on Linearity, held on June 26, 2016 in Porto, Portugal. The workshop was a one-day satellite event of FSCD 2016, the first International Conference on Formal ... More

On non-formal simply connected manifoldsDec 10 2002Jan 24 2003We construct examples of non-formal simply connected and compact oriented manifolds of any dimension bigger or equal to 7.

On Weierstraß semigroups at one and two points and their corresponding Poincaré seriesMar 30 2009Jun 29 2011The aim of this paper is to introduce and investigate the Poincar\'e series associated with the Weierstra{\ss} semigroup of one and two rational points at a (not necessarily irreducible) non-singular projective algebraic curve defined over a finite field, ... More

Kaplan-Meier V and U-statisticsOct 11 2018In this paper we study Kaplan-Meier $V$ and $U$-statistics defined as $\theta(\hat{F}_n)=\sum_{i,j}K(X_{[i:n]},X_{[j:n]})W_iW_j$ and $\theta_U(\hat{F}_n)=\sum_{i\neq j}K(X_{[i:n]},X_{[j:n]})W_iW_j/\sum_{i\neq j}W_iW_j$, where $\hat{F}_n$ denotes the Kaplan-Meier ... More

Controllability properties for some semilinear parabolic PDE with a quadratic gradient termFeb 03 2012We study several controllability properties for some semilinear parabolic PDE with a quadratic gradient term. For internal distributed controls, it is shown that the system is approximately and null controllable. The proof relies on the Cole-Hopf transformation. ... More

Symplectic nilmanifolds with a symplectic non-free $Z_3$-actionJun 22 2005Dec 12 2006This paper expands some of the issues of the paper math.SG/0506449. We introduce a new technique to produce symplectic manifolds, by taking a symplectic non-free action of a finite group on a symplectic manifold and resolving symplectically the singularities ... More

Every strongly summable ultrafilter on $\bigoplus\mathbb Z_2$ is sparseFeb 22 2013Mar 25 2013We investigate the possibility of the existence of nonsparse strongly summable ultrafilters on certain abelian groups. In particular, we show that every strongly summable ultrafilter on the countably infinite Boolean group is sparse. This answers a question ... More

On the absolute divergence of Fourier series in the infinite dimensional torusJun 05 2019We present some simple counterexamples, based on quadratic forms in infinitely many variables, showing that the implication $f\in C^{(\infty}(\mathbb{T}^\omega)\Longrightarrow\sum_{\bar{p}\in\mathbb{Z}^\infty}|\widehat{f}(\bar{p})|<\infty$ is false. There ... More

Exploring the limits of super-Planckian far-field radiative heat transfer using 2D materialsFeb 26 2018Very recently it has been predicted that the far-field radiative heat transfer between two macroscopic systems can largely overcome the limit set by Planck's law if one of their dimensions becomes much smaller than the thermal wavelength ($\lambda_{\rm ... More

Super-Planckian Far-Field Radiative Heat TransferAug 21 2017We present a theoretical analysis that demonstrates that the far-field radiative heat transfer between objects with dimensions smaller than the thermal wavelength can overcome the Planckian limit by orders of magnitude. We illustrate this phenomenon with ... More

Trophic coherence determines food-web stabilityApr 30 2014Nov 24 2014Why are large, complex ecosystems stable? Both theory and simulations of current models predict the onset of instability with growing size and complexity, so for decades it has been conjectured that ecosystems must have some unidentified structural property ... More

Macroscopic quantum behaviour of periodic quantum systemsSep 02 2013In this paper we introduce a simple procedure for computing the macroscopic quantum behaviour of periodic quantum systems in the high energy regime. The macroscopic quantum coherence is ascribed to a one-particle state, not to a condensate of a many-particle ... More

Observation of the Black Widow B1957+20 millisecond pulsar binary system with the MAGIC telescopesJun 05 2017B1957+20 is a millisecond pulsar located in a black widow type compact binary system with a low mass stellar companion. The interaction of the pulsar wind with the companion star wind and/or the interstellar plasma is expected to create plausible conditions ... More

HD 77407 and GJ 577: two new young stellar binaries detected with the Calar Alto Adaptive Optics system ALFAFeb 04 2004We present the first results from our search for close stellar and sub-stellar companions to young nearby stars on the northern sky. Our infrared imaging observations are obtained with the 3.5 m Calar Alto telescope and the AO system ALFA. With two epoch ... More

The blazar TXS 0506+056 associated with a high-energy neutrino: insights into extragalactic jets and cosmic ray accelerationJul 11 2018Jul 30 2018A neutrino with energy of $\sim$290 TeV, IceCube-170922A, was detected in coincidence with the BL Lac object TXS~0506+056 during enhanced gamma-ray activity, with chance coincidence being rejected at $\sim 3\sigma$ level. We monitored the object in the ... More

Utilization of Water Supply Networks for Harvesting Renewable EnergyAug 15 2018Renewable surplus power is increasing due to the increasing penetration of these intermittent resources. In practice, electric grid operators either curtail the surplus energy resulting from renewable-based generations or utilize energy storage resources ... More

Pełczyński's property ($V^{*}$) of order $p$ and its quantificationJul 07 2016We introduce the concepts of Pe{\l}czy\'{n}ski's property ($V$) of order $p$ and Pe{\l}czy\'{n}ski's property ($V^{*}$) of order $p$. It is proved that, for each $1<p<\infty$, the James $p$-space $J_{p}$ enjoys Pe{\l}czy\'{n}ski's property ($V^{*}$) of ... More

Optimal Tap Setting of Voltage Regulation Transformers Using Batch Reinforcement LearningJul 29 2018Feb 14 2019In this paper, we address the problem of setting the tap positions of load tap changers (LTCs) for voltage regulation in radial power distribution systems under uncertain load dynamics. The objective is to find a policy to determine the tap positions ... More

A certified reduction strategy for homological image processingJun 04 2013The analysis of digital images using homological procedures is an outstanding topic in the area of Computational Algebraic Topology. In this paper, we describe a certified reduction strategy to deal with digital images, but preserving their homological ... More

Covariation representations for Hermitian Lévy process ensembles of free infinitely divisible distributionsJul 16 2012Dec 14 2012It is known that the so-called Bercovici-Pata bijection can be explained in terms of certain Hermitian random matrix ensembles $(M_{d})_{d\geq1}$ whose asymptotic spectral distributions are free infinitely divisible. We investigate Hermitian L\'{e}vy ... More

Intervality and coherence in complex networksMar 11 2016Food webs -- networks of predators and prey -- have long been known to exhibit "intervality": species can generally be ordered along a single axis in such a way that the prey of any given predator tend to lie on unbroken compact intervals. Although the ... More

Thermal transistor effect in quantum systemsFeb 04 2019We study a quantum system composed of three interacting qubits, each coupled to a different thermal reservoir. We show how to engineer it in order to build a quantum device that is analogous to an electronic bipolar transistor. We outline how the interaction ... More

A theory of non-equilibrium local search on random satisfaction problemsMar 04 2019We study local search algorithms to solve instances of the random $k$-satisfiabi lity problem, equivalent to finding (if they exist) zero-energy ground states of statistical models with disorder on random hypergraphs. It is well known that the best such ... More

Chemical abundances and temperature structure of H II regionsJun 05 2019We use a sample of 37 H II regions with high quality spectra to study the behavior of the relative abundances of several elements as a function of metallicity. The sample includes spectra for eight H II regions of the Magellanic Clouds, obtained with ... More

Antiferromagnetic Domain Structure in Bilayer ManganiteFeb 12 2013We report a novel soft x-ray nanodiffraction study of antiferromagnetic domains in the strongly correlated bylayer manganite La$_{0.96}$Sr$_{2.04}$Mn$_{2}$O$_{7}$. We find that the antiferromagnetic domains are quenched, forming a unique domain pattern ... More

Upper Bound on the First Star Formation HistoryDec 23 2013Our understanding of the nature of the extragalactic background light (EBL) has improved with the recent development of gamma-ray observation techniques. An open subject in the context of the EBL is the reionization epoch, which is an important probe ... More

Measurement of the 235U(n,f) cross section relative to the 6Li(n,t) and 10B(n,alpha) standards from thermal to 170 keV neutron energy range at n_TOFFeb 27 2019Mar 04 2019The 235U(n,f) cross section was measured in a wide energy range at n_TOF relative to 6Li(n,t) and 10B(n,alpha), with high resolution and in a wide energy range, with a setup based on a stack of six samples and six silicon detectors placed in the neutron ... More

Adaptive Coordination of Distributed Energy Resources in Lossy Power Distribution SystemsNov 11 2017Feb 27 2018This paper is concerned with the problem of coordinating a set of distributed energy resources (DERs) in a lossy power distribution system to provide frequency regulation services to a bulk power grid with the explicit consideration of system losses. ... More

Unconditionally $p$-converging operators and Dunford-Pettis Property of order $p$Jul 07 2016In the present paper we study unconditionally $p$-converging operators and Dunford-Pettis property of order $p$. New characterizations of unconditionally $p$-converging operators and Dunford-Pettis property of order $p$ are established. Six quantities ... More