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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

Total Absorption Spectroscopy Study of the Beta Decay of $^{86}$Br and $^{91}$RbApr 06 2017The beta decays of $^{86}$Br and $^{91}$Rb have been studied using the total absorption spectroscopy technique. The radioactive nuclei were produced at the IGISOL facility in Jyv\"askyl\"a and further purified using the JYFLTRAP. $^{86}$Br and $^{91}$Rb ... More

Polarized neutron channeling in weakly magnetic filmsOct 16 2018We describe a new sensitive method for the investigation of weakly magnetic films placed inside a tri-layer planar waveguide. Polarized neutrons tunnel into the waveguide through the surface, channel along the layers and are emitted from the end face ... More

Aharonov-Bohm oscillations in the local density of statesAug 31 2009Oct 02 2009The scattering of electrons with inhomogeneities produces modulations in the local density of states of a metal. We show that electron interference contributions to these modulations are affected by the magnetic field via the Aharonov-Bohm effect. This ... More

Wireless Optimisation via Convex Bandits: Unlicensed LTE/WiFi CoexistenceFeb 05 2018Bandit Convex Optimisation (BCO) is a powerful framework for sequential decision-making in non-stationary and partially observable environments. In a BCO problem, a decision-maker sequentially picks actions to minimize the cumulative cost associated with ... More

A Detailed Comparison of Multi-Dimensional Boltzmann Neutrino Transport Methods in Core-Collapse SupernovaeJun 19 2017Sep 14 2017The mechanism driving core-collapse supernovae is sensitive to the interplay between matter and neutrino radiation. However, neutrino radiation transport is very difficult to simulate, and several radiation transport methods of varying levels of approximation ... More

Long-lived inverse chirp signals from core collapse in massive scalar-tensor gravityAug 11 2017Dec 01 2017This letter considers stellar core collapse in massive scalar--tensor theories of gravity. The presence of a mass term for the scalar field allows for dramatic increases in the radiated gravitational wave signal. There are several potential smoking gun ... More

R-process Nucleosynthesis from Three-Dimensional Magnetorotational Core-Collapse SupernovaeDec 26 2017We investigate r-process nucleosynthesis in three-dimensional (3D) general-relativistic magnetohydrodynamic simulations of rapidly rotating strongly magnetized core collapse. The simulations include a microphysical finite-temperature equation of state ... More

Divergence of neutron microbeams from planar waveguidesOct 15 2018Neutron planar waveguides are focusing devices generating a narrow neutron beam of submicron width. Such a neutron microbeam can be used for the investigation of local microstructures with high spatial resolution. The essential parameter of the microbeam ... More

Probing Extreme-Density Matter with Gravitational Wave Observations of Binary Neutron Star Merger RemnantsDec 19 2016Jun 03 2017We present a proof-of-concept study, based on numerical-relativity simulations, of how gravitational waves (GWs) from neutron star merger remnants can probe the nature of matter at extreme densities. Phase transitions and extra degrees of freedom can ... More

Generic Gravitational Wave Signals from the Collapse of Rotating Stellar CoresFeb 12 2007Jun 12 2007We perform general relativistic simulations of stellar core collapse to a proto-neutron star, using a microphysical equation of state as well as an approximate description of deleptonization. We show that for a wide variety of rotation rates and profiles ... More

Monte Carlo Neutrino Transport Through Remnant Disks from Neutron Star MergersJul 13 2015Oct 02 2015We present Sedonu, a new open source, steady-state, special relativistic Monte Carlo (MC) neutrino transport code, available at bitbucket.org/srichers/sedonu. The code calculates the energy- and angle-dependent neutrino distribution function on fluid ... More

Nanophotonic Particle Simulation and Inverse Design Using Artificial Neural NetworksOct 18 2017We propose a method to use artificial neural networks to approximate light scattering by multilayer nanoparticles. We find the network needs to be trained on only a small sampling of the data in order to approximate the simulation to high precision. Once ... More

On the Equicontinuity Region of Discrete Subgroups of PU(1,n)Sep 09 2008Let $ G $ be a discrete subgroup of PU(1,n). Then $ G $ acts on $\mathbb {P}^n_\mathbb C$ preserving the unit ball $\mathbb {H}^n_\mathbb {C}$, where it acts by isometries with respect to the Bergman metric. In this work we determine the equicontinuty ... More

Modeling, Analysis and Impact of a Long Transitory Phase in Random Access ProtocolsMay 22 2014In random access protocols, the service rate depends on the number of stations with a packet buffered for transmission. We demonstrate via numerical analysis that this state-dependent rate along with the consideration of Poisson traffic and infinite (or ... More

On Efficiency and Validity of Previous Homeplug MAC Performance AnalysisJan 27 2014Oct 13 2014The Medium Access Control protocol of Power Line Communication networks (defined in Homeplug and IEEE 1901 standards) has received relatively modest attention from the research community. As a consequence, there is only one analytic model that complies ... More

On nonparaxial nonlinear Schrödinger-type equationsFeb 22 2019In this paper the one-dimensional nonparaxial nonlinear Schr\"odinger equation is considered. This was proposed as an alternative to the classical nonlinear Schr\"odinger equation in those situations where the assumption of paraxiality may fail. The paper ... More

Abundant Methanol Masers but no New Evidence for Star Formation in GCM0.253+0.016Mar 27 2015We present new observations of the quiescent giant molecular cloud GCM0.253+0.016 in the Galactic center, using the upgraded Karl G. Jansky Very Large Array. Observations were made at wavelengths near 1 cm, at K (24 to 26 GHz) and Ka (27 and 36 GHz) bands, ... More

Projective symmetries and induced electromagnetism in metric-affine gravityJul 26 2018Oct 17 2018We present a framework in which the projective symmetry of the Einstein-Hilbert action in metric-affine gravity is used to induce an effective coupling between the Dirac lagrangian and the Maxwell field. The effective $U(1)$ gauge potential arises as ... More

A Radio Survey of Galactic Center CloudsDec 20 2013We present a survey of molecules in a sample of Galactic center molecular clouds using the Karl G. Jansky Very large Array, which includes M0.25+0.01, the clouds near Sgr A, and Sgr B2. The molecules detected are primarily NH3 and HC3N; in Sgr B2-N we ... More

Astroparticle Techniques: Colombia active volcano candidates for Muon Telescope observation sitesApr 17 2017Apr 18 2017We discuss a methodology to identify observation points for muongraphy of active Colombian Volcanoes and it is found that only Cerro Machin can be studied.

Neutron production induced by $α$-decay with Geant4Jun 10 2019Neutron production induced by ($\alpha$,n) reactions is important in various scenarios. One of the most relevant ones is related to underground dark matter experiments, where the neutrons produced by the $\alpha$-decay from radioactive contaminants in ... More

Perturbations of the Spence-Abel equation and deformations of the dilogarithm functionJan 26 2016We analyze existence, uniqueness and regularity of solutions for perturbations of the Spence-Abel equation for the Rogers' dilogarithm. As an application we deduce a version of Hyers-Ulam stability for the Spence-Abel equation. Our analysis makes use ... More

Neutron capture cross section of unstable 63Ni: implications for stellar nucleosynthesisApr 11 2013The $^{63}$Ni($n, \gamma$) cross section has been measured for the first time at the neutron time-of-flight facility n\_TOF at CERN from thermal neutron energies up to 200 keV. In total, capture kernels of 12 (new) resonances were determined. Maxwellian ... More

Neutron capture cross section measurement of 238U at the n TOF CERN facility with C6D6 scintillation detectors in the energy region from 1 eV to 700 keVDec 01 2016The aim of this work is to provide a precise and accurate measurement of the 238U(n,g) reaction cross section in the energy region from 1 eV to 700 keV. This reaction is of fundamental importance for the design calculations of nuclear reactors, governing ... More

Black hole-neutron star mergers at realistic mass ratios: Equation of state and spin orientation effectsDec 19 2012Apr 18 2013Black hole-neutron star mergers resulting in the disruption of the neutron star and the formation of an accretion disk and/or the ejection of unbound material are prime candidates for the joint detection of gravitational-wave and electromagnetic signals ... More

GRB 140606B / iPTF14bfu: Detection of shock-breakout emission from a cosmological gamma-ray burst?May 13 2015Jun 10 2015We present optical and near-infrared photometry of GRB~140606B ($z=0.384$), and optical photometry and spectroscopy of its associated supernova (SN). The results of our modelling indicate that the bolometric properties of the SN ($M_{\rm Ni} = 0.4\pm0.2$~M$_{\odot}$, ... More

The Influence of Neutrinos on r-Process Nucleosynthesis in the Ejecta of Black Hole-Neutron Star MergersJan 28 2016Apr 06 2017During the merger of a black hole and a neutron star, baryonic mass can become unbound from the system. Because the ejected material is extremely neutron-rich, the r-process rapidly synthesizes heavy nuclides as the material expands and cools. In this ... More

SiS in the circumstellar envelope of IRC +10126: maser and quasi-thermal emissionJun 08 2017We present new Effelsberg-100 m, ATCA, and VLA observations of rotational SiS transitions in the circumstellar envelope (CSE) of IRC +10216. Thanks to the high angular resolution achieved by the ATCA observations, we unambiguously confirm that the molecule's ... More

Characterization of a CLYC detector for underground experimentsOct 06 2017Large size detectors based on Cs2LiYCl6:Ce (CLYC) are capable of performing a combined $\gamma$-ray and neutron spectrometry and constitute a promising technology for a wide range of applications in nuclear and high energy physics. Due to their novelty, ... More

The 80 Ms follow-up of the X-ray afterglow of GRB 130427A challenges the standard forward shock modelFeb 12 2016Jun 29 2016GRB 130427A was the brightest gamma-ray burst detected in the last 30 years. With an equivalent isotropic energy output of $8.5\times10^{53}$ erg and redshift $z=0.34$, it uniquely combined very high energetics with a relative proximity to Earth. As a ... More

Asymptotic behavior of a generalized TCP congestion avoidance algorithmAug 19 2006The Transmission Control Protocol (TCP) is a Transport Protocol used in the Internet. Ott has introduced a more general class of candidate Transport Protocols called "protocols in the TCP Paradigm". The long run objective of studying this larger class ... More

A Square Peg in a Round Hole: The Complex Path for Wireless in the Manufacturing IndustryAug 09 2018Feb 01 2019The manufacturing industry is at the edge of the 4th industrial revolution, a paradigm of integrated architectures in which the entire production chain (composed of machines, workers and products) is intrinsically connected. Wireless technologies can ... More

Multi-domain ferroelectricity as a limiting factor for voltage amplification in ferroelectric field-effect transistorsMar 19 2011We revise the possibility of having an amplified surface potential in ferroelectric field-effect transistors pointed out by [S. Salahuddin and S. Datta, Nano Lett. 8, 405 (2008)]. We show that the negative-capacitance regime that allows for such an amplification ... More

Existence and convergence of Puiseux series solutions for first order autonomous differential equationsAug 24 2019Given an algebraic first order autonomous ordinary differential equation F(y,y')=0, we prove that every formal Puiseux series solution of F(y,y')=0, expanded around any finite point or at infinity, is convergent. The proof is constructive and we provide ... More

Cross section measurements of $^{155,157}$Gd(n,$γ$) induced by thermal and epithermal neutronsMay 10 2018Neutron capture measurements on $^{155}$Gd and $^{157}$Gd were performed using the time-of-flight technique at the n\_TOF facility at CERN. Four samples in form of self-sustaining metallic discs isotopically enriched in $^{155}$Gd and $^{157}$Gd were ... More

ALMA Multi-line Imaging of the Nearby Starburst Galaxy NGC 253Jan 23 2015We present spatially resolved ($\sim$50 pc) imaging of molecular gas species in the central kiloparsec of the nearby starburst galaxy NGC 253, based on observations taken with the Atacama Large Millimeter/submillimeter Array (ALMA). A total of 50 molecular ... More

Herschel Space Observatory - An ESA facility for far-infrared and submillimetre astronomyMay 28 2010Herschel was launched on 14 May 2009, and is now an operational ESA space observatory offering unprecedented observational capabilities in the far-infrared and submillimetre spectral range 55-671 {\mu}m. Herschel carries a 3.5 metre diameter passively ... More

A Local Ensemble Kalman Filter for Atmospheric Data AssimilationMar 19 2002Jul 30 2003In this paper, we introduce a new, local formulation of the ensemble Kalman Filter approach for atmospheric data assimilation. Our scheme is based on the hypothesis that, when the Earth's surface is divided up into local regions of moderate size, vectors ... 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

On the number of lines in the limit set for discrete subgroups of $PSL(3,\Bbb{C})$Mar 02 2010Apr 18 2016Given a discret subgroup $\Gamma\subset PSL(3,\C)$, we determine the number of complex lines and complex lines in general position lying in the complement of: maximal regions on which $\Gamma$ acts properly discontinuously, the Kularni's limit set of ... More

Simulations of inspiraling and merging double neutron stars using the Spectral Einstein CodeApr 04 2016Jun 25 2016We present results on the inspiral, merger, and post-merger evolution of a neutron star - neutron star (NSNS) system. Our results are obtained using the hybrid pseudospectral-finite volume Spectral Einstein Code (SpEC). To test our numerical methods, ... More

The limit set of discrete subgroups of $PSL(3,\C)$Jan 29 2010If $\Gamma$ is a discrete subgroup of $PSL(3,\Bbb{C})$, it is determined the equicontinuity region $Eq(\Gamma)$ of the natural action of $\Gamma$ on $\Bbb{P}^2_\Bbb{C}$. It is also proved that the action restricted to $Eq(\Gamma)$ is discontinuous, and ... More

Subroups of $PSL(3,\Bbb{C})$ with four lines in general position in its Limit SetJan 28 2010Apr 18 2016In this article we provide an algebraic characterization of those groups of $PSL(3,\Bbb{C})$ whose limit set in the Kulkarni sense has, exactly, four lines in general position. Also we show that, for this class of groups, the equicontinuity set of the ... More

Measurement and analysis of the Am-243 neutron capture cross section at the n_TOF facility at CERNDec 04 2014Background:The design of new nuclear reactors and transmutation devices requires to reduce the present neutron cross section uncertainties of minor actinides. Purpose: Reduce the $^{243}$Am(n,$\gamma$) cross section uncertainty. Method: The $^{243}$Am(n,$\gamma$) ... More

Large deviations for Gaussian diffusions with delayOct 03 2016Jan 02 2018Dynamical systems driven by nonlinear delay SDEs with small noise can exhibit important rare events on long timescales. When there is no delay, classical large deviations theory quantifies rare events such as escapes from metastable fixed points. Near ... More

Fractal Dimension of Higher-Dimensional Chaotic RepellorsMar 06 2000Using examples we test formulae previously conjectured to give the fractal information dimension of chaotic repellors and their stable and unstable manifolds in ``typical'' dynamical systems in terms of the Lyapunov exponents and the characteristic escape ... More

Probing the Core-Collapse Supernova Mechanism with Gravitational WavesMay 18 2009The mechanism of core-collapse supernova explosions must draw on the energy provided by gravitational collapse and transfer the necessary fraction to the kinetic and internal energy of the ejecta. Despite many decades of concerted theoretical effort, ... More

The Gravitational Wave Signature of Core-Collapse SupernovaeSep 03 2008Jan 11 2009We review the ensemble of anticipated gravitational-wave (GW) emission processes in stellar core collapse and postbounce core-collapse supernova evolution. We discuss recent progress in the modeling of these processes and summarize most recent GW signal ... More

Massive Computation for Understanding Core-Collapse Supernova ExplosionsAug 29 2016How do massive stars explode? Progress toward the answer is driven by increases in compute power. Petascale supercomputers are enabling detailed three-dimensional simulations of core-collapse supernovae. These are elucidating the role of fluid instabilities, ... More

A master relation defines the nonlinear viscoelasticity of single fibroblastsMar 15 2006Cell mechanical functions like locomotion, contraction and division are controlled by the cytoskeleton, a dynamic biopolymer network whose mechanical properties remain poorly understood. We perform single-cell uniaxial stretching experiments on 3T3 fibroblasts. ... More

The SONATE project, a French CANS for Materials Sciences ResearchSep 04 2019We describe the Compact Accelerator-based Neutron Source SONATE which we are aiming for to replace the close Orph{\'e}e reactor at Saclay, France. The SONATE source would serve an instrumental suite of about 10 instruments. The instruments would be split ... More

The rp-process and new measurements of beta-delayed proton decay of light Ag and Cd isotopesJul 05 1996Recent network calculations suggest that a high temperature rp-process could explain the abundances of light Mo and Ru isotopes, which have long challenged models of p-process nuclide production. Important ingredients to network calculations involving ... More

The $^{7}$Be(n,p)$^{7}$Li reaction and the Cosmological Lithium Problem: measurement of the cross section in a wide energy range at n_TOF (CERN)Mar 15 2018We report on the measurement of the $^{7}$Be($n, p$)$^{7}$Li cross section from thermal to approximately 325 keV neutron energy, performed in the high-flux experimental area (EAR2) of the n_TOF facility at CERN. This reaction plays a key role in the lithium ... More

Estimating the Prevalence of Deception in Online Review CommunitiesApr 12 2012Consumers' purchase decisions are increasingly influenced by user-generated online reviews. Accordingly, there has been growing concern about the potential for posting "deceptive opinion spam" -- fictitious reviews that have been deliberately written ... More

Radioactive nuclei from cosmochronology to habitabilityAug 01 2018In addition to long-lived radioactive nuclei like U and Th isotopes, which have been used to measure the age of the Galaxy, also radioactive nuclei with half-lives between 0.1 and 100 million years (short-lived radionuclides, SLRs) were present in the ... More

Characterizing Internet Video for Large-scale Active MeasurementsAug 07 2014The availability of high definition video content on the web has brought about a significant change in the characteristics of Internet video, but not many studies on characterizing video have been done after this change. Video characteristics such as ... More

Formalized linear algebra over Elementary Divisor Rings in CoqJan 27 2016Jun 20 2016This paper presents a Coq formalization of linear algebra over elementary divisor rings, that is, rings where every matrix is equivalent to a matrix in Smith normal form. The main results are the formalization that these rings support essential operations ... More

ALMA Reveals the Molecular Medium Fueling the Nearest Nuclear StarburstNov 11 2014We use ALMA to derive the mass, length, and time scales associated with the nuclear starburst in NGC 253. This region forms ~2 M_sun/yr of stars and resembles other starbursts in scaling relations, with star formation consuming the gas reservoir 10 times ... More

A Detection of Sgr A* in the far infraredJun 19 2018We report the first detection of the Galactic Centre massive black hole, Sgr~A*, in the far infrared. Our measurements were obtained with PACS on board the \emph{Herschel} satellite at $100~\mathrm{\mu m}$ and $160~\mathrm{\mu m}$. While the warm dust ... More

Forming Super Star Clusters in the Central Starburst of NGC 253Apr 05 2018Oct 24 2018NGC 253 hosts the nearest nuclear starburst. Previous observations show a region rich in molecular gas, with dense clouds associated with recent star formation. We used ALMA to image the 350 GHz dust continuum and molecular line emission from this region ... More

The Starburst-Driven Molecular Wind in NGC 253 and the Suppression of Star FormationJul 23 2013Jul 29 2013The under-abundance of very massive galaxies in the universe is frequently attributed to the effect of galactic winds. Although ionized galactic winds are readily observable most of the expelled mass is likely in cooler atomic and molecular phases. Expanding ... More

Using Peano Curves to Construct Laplacians on FractalsFeb 10 2014We describe a new method to construct Laplacians on fractals using a Peano curve from the circle onto the fractal, extending an idea that has been used in the case of certain Julia sets. The Peano curve allows us to visualize eigenfunctions of the Laplacian ... More

Implications of Decentralized Q-learning Resource Allocation in Wireless NetworksMay 30 2017Aug 29 2017Reinforcement Learning is gaining attention by the wireless networking community due to its potential to learn good-performing configurations only from the observed results. In this work we propose a stateless variation of Q-learning, which we apply to ... More

Testing the gravitational theory with short-period stars around our Galactic CenterMay 30 2017Motion of short-period stars orbiting the supermassive black hole in our Galactic Center has been monitored for more than 20 years. These observations are currently offering a new way to test the gravitational theory in an unexplored regime: in a strong ... More

Semialgebraic decomposition of real binary forms of a given degree's spaceJun 13 2017Jul 09 2018The Waring Problem over polynomial rings asks for how to decompose an homogeneous polynomial of degree $d$ as a finite sum of $d^{th}$ powers of linear forms. First, we give a constructive method to obtain a real Waring decomposition of any given real ... More

A non-trivial connection for the metric-affine Gauss-Bonnet theory in $D = 4$Mar 01 2019Jun 05 2019We study non-trivial (i.e. non-Levi-Civita) connections in metric-affine Lovelock theories. First we study the projective invariance of general Lovelock actions and show that all connections constructed by acting with a projective transformation of the ... More

The small black hole illusionAug 30 2018Jun 19 2019Small black holes in string theory are characterized by a classically singular horizon with vanishing Bekenstein-Hawking entropy. It has been argued that higher-curvature corrections resolve the horizon and that the associated Wald entropy is in agreement ... More

(Generalized) quasi-topological gravities at all ordersSep 17 2019A new class of higher-curvature modifications of $D(\geq 4$)-dimensional Einstein gravity has been recently identified. Densities belonging to this "Generalized quasi-topological" class (GQTGs) are characterized by possessing non-hairy generalizations ... More

Helium Ignition on Accreting Neutron Stars with a New Triple-alpha Reaction RateAug 19 2010Nov 01 2010We investigate the effect of a new triple-alpha reaction rate from Ogata et al. (2009) on helium ignition conditions on accreting neutron stars and on the properties of the subsequent type I X-ray burst. We find that the new rate leads to significantly ... More

Exact calculation of the number of degrees of freedom of a rigid body constituted by n particlesFeb 10 2010In this work we discuss how to correctly obtain the number of degrees of freedom of a system constituted by n particles with fixed relative distances and which are immerse in a three-dimensional space. As a result of our analysis, we develop expressions ... More

On the Distributed Construction of a Collision-Free Schedule in Multi-Hop Packet Radio NetworksJun 20 2012This paper introduces a protocol that distributively constructs a collision-free schedule for multi-hop packet radio networks in the presence of hidden terminals. As a preliminary step, each wireless station computes the schedule length after gathering ... More

Microwave Absorption by a Mesoscopic Quantum Hall DropletJul 03 2013We consider the absorption of microwaves by a quantum Hall droplet. We show that the number and velocities of charged edge modes can be directly measured from a droplet of known shape. In contrast to standard transport measurements, different edge equilibration ... More

All higher-curvature gravities as Generalized quasi-topological gravitiesJun 03 2019Generalized quasi-topological gravities (GQTGs) are higher-curvature extensions of Einstein gravity characterized by the existence of non-hairy generalizations of the Schwarzschild black hole which satisfy $g_{tt}g_{rr}=-1$, as well as for having second-order ... More

Multiatom Greenberger-Horne-Zeilinger states using cavity-induced Rydberg blockadeNov 15 2016We describe a novel method for producing Greenberger-Horne-Zeilinger states in cold atoms coupled to a superconducting coplanar cavity. In the proposed scheme, atoms interact between each other by virtual photon exchange via a cavity mode. These interactions ... More

Invariant Hypersurfaces and Nodal Components of FoliationsAug 22 2019It is known that there is at least an invariant analytic curve passing through each of the components in the complement of nodal singularities, after the reduction of singularities of a germ of singular foliation in ${\mathbb C}^2,0$}. Here, we state ... More

GRB 091024A and the nature of ultra-long gamma-ray burstsOct 01 2013Oct 14 2013We present a broadband study of gamma-ray burst (GRB) 091024A within the context of other ultra-long-duration GRBs. An unusually long burst detected by Konus-Wind, Swift, and Fermi, GRB 091024A has prompt emission episodes covering ~1300 s, accompanied ... More

First Year Results From LOTISNov 14 1997LOTIS (Livermore Optical Transient Imaging System) is a gamma-ray burst optical counterpart search experiment located near Lawrence Livermore National Laboratory in California. The system is linked to the GCN (GRB Coordinates Network) real-time coordinate ... More

New Constraints on Simultaneous Optical Emission From GRBs Measured by the LOTIS ExperimentAug 13 1997Sep 15 1997LOTIS is a gamma-ray burst optical counterpart search experiment located near Lawrence Livermore National Laboratory in California. Since operations began in October 1996, LOTIS has responded to five triggers as of July 30, 1997, which occurred during ... More

Beam impact tests of a prototype target for the Beam Dump Facility at CERN: experimental setup and preliminary analysis of the online resultsSep 16 2019The Beam Dump Facility (BDF) is a project for a new facility at CERN dedicated to high intensity beam dump and fixed target experiments. Currently in its design phase, the first aim of the facility is to search for Light Dark Matter and Hidden Sector ... More

GRB100814A as a member of the growing set of bursts with sudden optical rebrighteningJun 22 2012We present the gamma-ray, X-ray, optical and radio data for GRB100814A. At the end of the slow decline phase of the X-ray and optical afterglow, a sudden and prominent rebrightening in the optical band occurs followed by a fast decay in both bands. This ... More

The Green function for the mixed problem for the linear Stokes system in domains in the planeOct 08 2013We construct the Green function for the mixed boundary value problem for the linear Stokes system in a two-dimensional Lipschitz domain.

Finding Deceptive Opinion Spam by Any Stretch of the ImaginationJul 22 2011Consumers increasingly rate, review and research products online. Consequently, websites containing consumer reviews are becoming targets of opinion spam. While recent work has focused primarily on manually identifiable instances of opinion spam, in this ... More

Transformation properties and general relativity regime in scalar-tensor theoriesApr 10 2015Nov 13 2015We consider first generation scalar-tensor theories of gravitation in a completely generic form, keeping the transformation functions of the local rescaling of the metric and the scalar field redefinition explicitly distinct from the coupling functions ... More

Parametrizations in scalar-tensor theories of gravity and the limit of general relativityJan 30 2015We consider a general scalar-tensor theory of gravity and review briefly different forms it can be presented (different conformal frames and scalar field parametrizations). We investigate the conditions under which its field equations and the parametrized ... More

Dual-wavelength fiber Fabry-Perot cavities with engineered birefringenceMay 10 2018We present a method to engineer the frequency splitting of polarization eigenmodes in fiber Fabry-Perot (FFP) cavities. Using specific pattern of multiple CO$_2$ laser pulses, we machine paraboloidal micromirrors with controlled elliptical shape in a ... More

The Hot and Energetic Universe: The Wide Field Imager (WFI) for Athena+Aug 30 2013The Wide Field Imager (WFI) is one of the two scientific instruments proposed for the Athena+ X-ray observatory. It will provide imaging in the 0.1-15 keV band over a wide field, simultaneously with spectrally and time-resolved photon counting. The instrument ... More

Run Control and Monitor System for the CMS ExperimentJun 18 2003The Run Control and Monitor System (RCMS) of the CMS experiment is the set of hardware and software components responsible for controlling and monitoring the experiment during data-taking. It provides users with a "virtual counting room", enabling them ... More

Two-dimensional spectral interpretation of time-dependent absorption near laser-coupled resonancesMar 11 2014We demonstrate a two-dimensional time-domain spectroscopy method to extract amplitude and phase modifications of excited atomic states caused by the interaction with ultrashort laser pulses. The technique is based on Fourier analysis of the absorption ... More

The Onset of Synchronization in Systems of Globally Coupled Chaotic and Periodic OscillatorsMay 09 2002A general stability analysis is presented for the determination of the transition from incoherent to coherent behavior in an ensemble of globally coupled, heterogeneous, continuous-time dynamical systems. The formalism allows for the simultaneous presence ... More

A statistical model for the excitation of cavities through aperturesFeb 23 2015In this paper, a statistical model for the coupling of electromagnetic radiation into enclosures through apertures is presented. The model gives a unified picture bridging deterministic theories of aperture radiation, and statistical models necessary ... More

Charged current neutrino interactions in core-collapse supernovae in a virial expansionSep 14 2012Dec 18 2012Core-collapse supernovae may depend sensitively on charged current neutrino interactions in warm, low density neutron rich matter. A proton in neutron rich matter is more tightly bound than is a neutron. This energy shift \Delta U increases the electron ... More

Occupancy Map Building through Bayesian ExplorationMar 01 2017We propose a novel holistic approach for safe autonomous exploration and map building based on constrained Bayesian optimisation. This method finds optimal continuous paths instead of discrete sensing locations that inherently satisfy motion and safety ... More

Experimental Lagrangian structure functions in turbulenceMar 15 2009May 15 2009Lagrangian properties obtained from a Particle Tracking Velocimetry experiment in a turbulent flow at intermediate Reynolds number are presented. Accurate sampling of particle trajectories is essential in order to obtain the Lagrangian structure functions ... More

Multi-DoF Time Domain Passivity Approach based Drift Compensation for TelemanipulationSep 04 2019When, in addition to stability, position synchronization is also desired in bilateral teleoperation, Time Domain Passivity Approach (TDPA) alone might not be able to fulfill the desired objective. This is due to an undesired effect caused by admittance ... More

The Flare Activity of SgrA*; New Coordinated mm to X-Ray ObservationsDec 16 2005We report new simultaneous near-infrared/sub-millimeter/X-ray observations of the SgrA* counterpart associated with the massive 3-4x10**6 solar mass black hole at the Galactic Center. The main aim is to investigate the physical processes responsible for ... More

Statistics of Impedance and Scattering Matrices in Chaotic Microwave Cavities: Single Channel CaseAug 13 2004Dec 16 2004We discuss a model for studying the statistical properties of the impedance ($Z$) and scattering ($S$) matrices of open electromagnetic cavities with several transmission lines or waveguides connected to the cavity. In this paper, we mainly discuss the ... More

Toward a compact fibered squeezing parametric sourceMar 20 2018In this work, we investigate three different compact fibered systems generating vacuum squeezing that involve optical cavities limited by the end surface of a fiber and by a curved mirror and containing a thin parametric crystal. These systems have the ... More

Revival of The Stalled Core-Collapse Supernova Shock Triggered by Precollapse Asphericity in the Progenitor StarSep 10 2013Oct 16 2013Multi-dimensional simulations of advanced nuclear burning stages of massive stars suggest that the Si/O layers of presupernova stars harbor large deviations from the spherical symmetry typically assumed for presupernova stellar structure. We carry out ... More

A New Open-Source Code for Spherically-Symmetric Stellar Collapse to Neutron Stars and Black HolesDec 14 2009Mar 29 2010We present the new open-source spherically-symmetric general-relativistic (GR) hydrodynamics code GR1D. It is based on the Eulerian formulation of GR hydrodynamics (GRHD) put forth by Romero-Ibanez-Gourgoulhon and employs radial-gauge, polar-slicing coordinates ... More