Results for "Christine L. Borgman"

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Open Data, Grey Data, and Stewardship: Universities at the Privacy FrontierFeb 08 2018As universities recognize the inherent value in the data they collect and hold, they encounter unforeseen challenges in stewarding those data in ways that balance accountability, transparency, and protection of privacy, academic freedom, and intellectual ... More
Digital Data Archives as Knowledge Infrastructures: Mediating Data Sharing and ReuseFeb 08 2018Digital data archives play essential roles in knowledge infrastructures by mediating access to data within and between communities. This three-year qualitative study of DANS, a digital data archive containing more than 50 years of heterogeneous data types, ... More
Effects of Quantum Stress Tensor Fluctuations with Compact Extra DimensionsJun 16 2004The effects of compact extra dimensions upon quantum stress tensor fluctuations are discussed. It is argued that as the compactification volume decrease, these fluctuations increase in magnitude. In principle, this would have the potential to create observable ... More
The Effects of Stress Tensor Fluctuations upon FocusingJul 10 2003Nov 10 2004We treat the gravitational effects of quantum stress tensor fluctuations. An operational approach is adopted in which these fluctuations produce fluctuations in the focusing of a bundle of geodesics. This can be calculated explicitly using the Raychaudhuri ... More
From Artifacts to Aggregations: Modeling Scientific Life Cycles on the Semantic WebJun 14 2009Oct 21 2009In the process of scientific research, many information objects are generated, all of which may remain valuable indefinitely. However, artifacts such as instrument data and associated calibration information may have little value in isolation; their meaning ... More
The Durability and Fragility of Knowledge Infrastructures: Lessons Learned from AstronomyOct 31 2016Infrastructures are not inherently durable or fragile, yet all are fragile over the long term. Durability requires care and maintenance of individual components and the links between them. Astronomy is an ideal domain in which to study knowledge infrastructures, ... More
Validating pore-scale models of drying using microfluidic experimentsDec 06 2016We present an experimental micro-model of drying porous media, based on microfluidic cells made of arrays of pillars on a regular grid, and complement these experiments with a matching two-dimensional pore-network model of drying. Disorder, or small-scale ... More
Impact of spatially correlated pore-scale heterogeneity on drying porous mediaDec 03 2016We study the effect of spatially-correlated heterogeneity on the rate and extent of isothermal drying of porous media. We combine a minimal pore-scale model with microfluidic experiments using a similar pore geometry. This approach could be useful for ... More
Selfish Routing on Dynamic FlowsJul 13 2015Selfish routing on dynamic flows over time is used to model scenarios that vary with time in which individual agents act in their best interest. In this paper we provide a survey of a particular dynamic model, the deterministic queuing model, and discuss ... More
Black hole thermodynamics in finite timeJan 03 2016Finite-time thermodynamics provides the means to revisit ideal thermodynamic equilibrium processes in the light of reality and investigate the energetic "price of haste", i.e. the consequences of carrying out a process in finite time, when perfect equilibrium ... More
Splitting formulae for the Kontsevich-Kuperberg-Thurston invariant of rational homology 3-spheresNov 19 2004M. Kontsevich proposed a topological construction for an invariant Z of rational homology 3-spheres using configuration space integrals. G. Kuperberg and D. Thurston proved that Z is a universal real finite type invariant for integral homology spheres ... More
An Approach to Proper Name Tagging for GermanJun 28 1995Jun 29 1995This paper presents an incremental method for the tagging of proper names in German newspaper texts. The tagging is performed by the analysis of the syntactic and textual contexts of proper names together with a morphological analysis. The proper names ... More
A Macaulay2 package for characteristic classes and the topological Euler characteristic of complex projective schemesJan 17 2013Jan 18 2013The Macaulay2 package CharacteristicClasses provides commands for the computation of the topological Euler characteristic, the degrees of the Chern classes and the degrees of the Segre classes of a closed subscheme of complex projective space. The computations ... More
An algorithm for computing the topological Euler characteristic of complex projective varietiesJan 17 2013Jul 01 2013We present an algorithm for the symbolic and numerical computation of the degrees of the Chern-Schwartz-MacPherson classes of a closed subvariety of projective space P^n. As the degree of the top Chern-Schwartz-MacPherson class is the topological Euler ... More
The Two-Component Virial Theorem and the Physical Properties of Stellar SystemsOct 29 1999Apr 05 2000Motivated by present indirect evidences that galaxies are surrounded by dark matter halos, we investigate whether their physical properties can be described by a formulation of the virial theorem which explicitly takes into account the gravitational potential ... More
Indefinite Affine Hyperspheres Admitting a Pointwise Symmetry. Part 2Oct 19 2009An affine hypersurface $M$ is said to admit a pointwise symmetry, if there exists a subgroup $G$ of ${\rm Aut}(T_p M)$ for all $p\in M$, which preserves (pointwise) the affine metric $h$, the difference tensor $K$ and the affine shape operator $S$. Here, ... More
The mixed functors of the category Fquad: a first studyNov 18 2006In previous work, we defined the category of functors Fquad, associated to vector spaces over the field with two elements equipped with a nondegenerate quadratic form. In this paper, we define a special family of objects in the category Fquad, named the ... More
Conditional least squares estimation in nonstationary nonlinear stochastic regression modelsJan 13 2010Let $\{Z_n\}$ be a real nonstationary stochastic process such that $E(Z_n|{\mathcaligr F}_{n-1})\stackrel{\mathrm{a.s.}}{<}\infty$ and $E(Z^2_n|{\mathcaligr F}_{n-1})\stackrel{\mathrm{a.s.}}{<}\infty$, where $\{{\mathcaligr F}_n\}$ is an increasing sequence ... More
The rank of a hypergeometric systemJul 02 2008Feb 10 2010The holonomic rank of the A-hypergeometric system M_A(\beta) is the degree of the toric ideal I_A for generic parameters; in general, this is only a lower bound. To the semigroup ring of A we attach the ranking arrangement and use this algebraic invariant ... More
Globalizing L-infinity automorphisms of the Schouten algebra of polyvector fieldsJan 06 2012Jan 17 2013Recently, Willwacher showed that the Grothendieck-Teichmuller group GRT acts by L-infinity-automorphisms on the Schouten algebra of polyvector fields T_poly(R^d) on affine space R^d. In this article, we prove that a large class of L-infinity-automorphisms ... More
On the Kontsevich-Kuperberg-Thurston construction of a configuration-space invariant for rational homology 3-spheresNov 04 2004M. Kontsevich proposed a topological construction for an invariant Z of rational homology 3-spheres using configuration space integrals. G. Kuperberg and D. Thurston proved that Z is a universal real finite type invariant for integral homology spheres ... More
Indefinite affine hyperspheres admitting a pointwise symmetryOct 25 2005An affine hypersurface M is said to admit a pointwise symmetry, if there exists a subgroup G of Aut(T_p M) for all p in M, which preserves (pointwise) the affine metric h, the difference tensor K and the affine shape operator S. Here, we consider 3-dimensional ... More
GMC Evolution in a Barred Spiral Galaxy with Star Formation and Thermal FeedbackJun 15 2016We explore the impact of star formation and thermal stellar feedback on the giant molecular cloud (GMC) population forming in a M83-type barred spiral galaxy. We compare three high-resolution simulations (1.5 pc cell size) with different star formation/feedback ... More
Mapping Complex Networks: Exploring Boolean Modeling of Signal Transduction PathwaysNov 03 2009Dec 14 2009In this study, we explored the utility of a descriptive and predictive bionetwork model for phospholipase C-coupled calcium signaling pathways, built with non-kinetic experimental information. Boolean models generated from these data yield oscillatory ... More
Characterization of the non-classical nature of conditionally prepared single photonsDec 23 2004A reliable single photon source is a prerequisite for linear optical quantum computation and for secure quantum key distribution. A criterion yielding a conclusive test of the single photon character of a given source, attainable with realistic detectors, ... More
The dense gas in the largest molecular complexes of the Antennae: HCN and HCO+ observations of NGC 4038/39 using ALMAApr 01 2016We present observations of the dense molecular gas tracers HCN, HNC, and HCO+ in the J=1-0 transition using ALMA. We supplement our datasets with previous observations of CO J=1-0, which traces the total molecular gas content. We separate the Antennae ... More
Non-linear (loop) quantum cosmologyOct 30 2012Inhomogeneous quantum cosmology is modeled as a dynamical system of discrete patches, whose interacting many-body equations can be mapped to a non-linear minisuperspace equation by methods analogous to Bose-Einstein condensation. Complicated gravitational ... More
Generic representations of orthogonal groups: projective functors in the category FquadApr 04 2007In this paper, we continue the study of the category of functors Fquad, associated to F_2-vector spaces equipped with a nondegenerate quadratic form, initiated in two previous papers of the author. We define a filtration of the standard projective objects ... More
The functor category FquadJun 20 2006In this paper, we define the functor category Fquad associated to vector spaces over the field with two elements, F\_2, equipped with a quadratic form. We show the existence of a fully-faithful, exact functor \iota: \F \to Fquad, which preserves simple ... More
10 Simple Rules for the Care and Feeding of Scientific DataJan 09 2014This article offers a short guide to the steps scientists can take to ensure that their data and associated analyses continue to be of value and to be recognized. In just the past few years, hundreds of scholarly papers and reports have been written on ... More
Discovery of a Very Low Mass Triple with Late-M and T Dwarf Components: LP 704-48/SDSS J0006-0852ABAug 01 2012We report the identification of the M9 dwarf SDSS J000649.16-085246.3 as a spectral binary and radial velocity variable with components straddling the hydrogen burning mass limit. Low-resolution near-infrared spectroscopy reveals spectral features indicative ... More
Another look at the size of the low-surface brightness galaxy VCC 1661 in the Virgo ClusterOct 25 2016We present new wide-field images of the low-surface brightness Virgo Cluster dwarf galaxy VCC 1661. The extant literature lists a broad range of radii for this object, covering a factor of more than four, depending on the filters used and the details ... More
Thermodynamic Geodesics of a Reissner Nordström Black HoleSep 23 2016Starting from a Geometrothermodynamics metric for the space of thermodynamic equilibrium states in the mass representation, we use numerical techniques to analyse the thermodynamic geodesics of a supermassive Reissner Nordstr\"om black hole in isolation. ... More
Cosmographic analysis of the equation of state of the universe through Padé approximationsSep 12 2013Cosmography is used in cosmological data processing in order to constrain the kinematics of the universe in a model-independent way, providing an objective means to evaluate the agreement of a model with observations. In this paper, we extend the conventional ... More
Maximal multiplicative properties of partitionsMar 13 2014Apr 06 2014Extending the partition function multiplicatively to a function on partitions, we show that it has a unique maximum at an explicitly given partition for any $n\neq 7$. The basis for this is an inequality for the partition function which seems not to have ... More
A Model for Communication in Clusters of Multi-core MachinesOct 13 2008Apr 30 2012A common paradigm for scientific computing is distributed message-passing systems, and a common approach to these systems is to implement them across clusters of high-performance workstations. As multi-core architectures become increasingly mainstream, ... More
Bounds for binary codes relative to pseudo-distances of k pointsFeb 16 2010We apply Schrijver's semidefinite programming method to obtain improved upper bounds on generalized distances and list decoding radii of binary codes.
Geometrothermodynamic model for the evolution of the UniverseNov 30 2016Using the formalism of geometrothermodynamics to derive a fundamental thermodynamic equation, we construct a cosmological model in the framework of relativistic cosmology. In a first step, we describe a system without thermodynamic interaction, and show ... More
The limits of weak selection and large population size in evolutionary game theoryOct 22 2016Evolutionary game theory is a mathematical approach to studying how social behaviors evolve. In many recent works, evolutionary competition between strategies is modeled as a stochastic process in a finite population. In this context, two limits are both ... More
Proceedings 6th International Workshop on Local Search Techniques in Constraint SatisfactionOct 08 2009LSCS is a satellite workshop of the international conference on principles and practice of Constraint Programming (CP), since 2004. It is devoted to local search techniques in constraint satisfaction, and focuses on all aspects of local search techniques, ... More
Coherence oscillations between weakly coupled Bose-Hubbard dimersMay 11 2014We study theoretically the dynamics of two weakly-coupled Bose-Josephson junctions, prepared with the same particle number $N$ and Josephson excitation number $\nu$ but with different reduced one-particle purity $\gamma$. A novel entropy oscillation mode ... More
Characterizing entanglement in pulsed parametric downconversion using chronocyclic Wigner functionsFeb 27 2013Pulsed parametric downconversion (PDC) processes generate photon pairs with a rich spectral-temporal structure, which offer an attractive potential for quantum information and communication applications. In this paper, we investigate the four-dimensional ... More
Non-negatively curved 6-manifolds with almost maximal symmetry rankDec 06 2016We classify closed, simply-connected, non-negatively curved 6-manifolds of almost maximal symmetry rank up to equivariant diffeomorphism.
Spectral Invariance of Non-Smooth Pseudodifferential OperatorsDec 29 2015Jan 05 2016In this paper we discuss some spectral invariance results for non-smooth pseudodifferential operators with coefficients in H\"older spaces. In analogy to the proof in the smooth case of Beals and Ueberberg, we use the characterization of non-smooth pseudodifferential ... More
Characterization of Non-Smooth Pseudodifferential OperatorsNov 29 2015Smooth pseudodifferential operators on $\mathbb{R}^n$ can be characterized by their mapping properties between $L^p-$Sobolev spaces due to Beals and Ueberberg. In applications such a characterization would also be useful in the non-smooth case, for example ... More
Cartan Invariants of Symmetric Groups and Iwahori-Hecke AlgebrasSep 25 2008K\"{u}lshammer, Olsson and Robinson conjectured that a certain set of numbers determined the invariant factors of the $\ell$-Cartan matrix for $S_n$ (equivalently, the invariant factors of the Cartan matrix for the Iwahori-Hecke algebra $\mathcal{H}_n(q)$, ... More
$D$-modules arithmétiques, distributions et localisationJan 27 2014Sep 29 2014Let $p$ be a prime number, $V$ a discrete valuation ring of unequal caracteristics $(0,p)$, $G$ a smooth affine algebraic group over $Spec \,V$. Using partial divided powers techniques of Berthelot, we construct arithmetic distribution algebras, with ... More
The effect of feedback and reionization on star formation in low-mass dwarf galaxy haloesNov 05 2012Mar 18 2013We simulate the evolution of a 10^9 Msun dark matter halo in a cosmological setting with an adaptive-mesh refinement code as an analogue to local low luminosity dwarf irregular and dwarf spheroidal galaxies. The primary goal of our study is to investigate ... More
Chiral Vortons and Cosmological Constraints on Particle PhysicsNov 01 1999Apr 04 2000We investigate the cosmological consequences of particle physics theories that admit stable loops of current-carrying string - vortons. In particular, we consider chiral theories where a single fermion zero mode is excited in the string core, such as ... More
Submatrices of character tables and basic setsOct 04 2011Jun 03 2012In this investigation of character tables of finite groups we study basic sets and associated representation theoretic data for complementary sets of conjugacy classes. For the symmetric groups we find unexpected properties of characters on restricted ... More
Smith Normal Form of a Multivariate Matrix Associated with PartitionsNov 24 2013Apr 18 2014Consideration of a question of E. R. Berlekamp led Carlitz, Roselle, and Scoville to give a combinatorial interpretation of the entries of certain matrices of determinant~1 in terms of lattice paths. Here we generalize this result by refining the matrix ... More
Modified Gravity and the CMBSep 27 2011Dec 09 2011We consider the effect of modified gravity on the peak structure of the Cosmic Microwave Background (CMB) spectrum. We focus on simple models of modified gravity mediated by a massive scalar field coupled to both baryons and cold dark matter. This captures ... More
SupersymmetronSep 02 2011Dec 09 2011We consider a supersymmetric model of dark energy coupled to cold dark matter: the supersymmetron. In the absence of cold dark matter, the supersymmetron converges to a supersymmetric minimum with a vanishing cosmological constant. When cold dark matter ... More
Induced scalar potentials for hypermultipletsOct 24 1997Charged BPS hypermultiplets can develop a non-trivial self-interaction in the Coulomb branch of an N=2 supersymmetric gauge theory, whereas neutral BPS hypermultiplets in the Higgs branch may also have a non-trivial self-interaction in the presence of ... More
A-graded methods for monomial idealsJul 28 2008Mar 04 2009We use \ZZ^d-gradings to study d-dimensional monomial ideals. The Koszul functor is employed to interpret the quasidegrees of local cohomology in terms of the geometry of distractions and to explicitly compute the multiplicities of exponents. These multigraded ... More
Thermodynamic Geodesics of a Reissner Nordström Black HoleSep 23 2016Oct 13 2016Starting from a Geometrothermodynamics metric for the space of thermodynamic equilibrium states in the mass representation, we use numerical techniques to analyse the thermodynamic geodesics of a supermassive Reissner Nordstr\"{o}m black hole in isolation. ... More
An Inhomogeneous Space-Time Patching Model Based on a Nonlocal and Nonlinear Schrodinger EquationMay 04 2016We consider an integrable, nonlocal and nonlinear, Schr\"odinger equation (NNSE) as a model for building space-time patchings in inhomogeneous loop quantum cosmology (LQC). We briefly review exact solutions of the NNSE, specially those obtained through ... More
An Approach to Loop Quantum Cosmology Through Integrable Discrete Heisenberg Spin ChainsSep 17 2012Nov 16 2012The quantum evolution equation of Loop Quantum Cosmology (LQC) -- the quantum Hamiltonian constraint -- is a difference equation. We relate the LQC constraint equation in vacuum Bianchi I separable (locally rotationally symmetric) models with an integrable ... More
Neutrino Mixing and the Frobenius Group T13Jun 01 2011Jul 25 2011We show that the Frobenius group $T_{13} = Z_{13} \rtimes Z_3$ is a suitable family symmetry group to study neutrino oscillations. Our approach is to catalog all possibilities within an effective field theory approach, assuming only SU(2)xU(1) supplemented ... More
Five guidelines for the evaluation of site-specific medium range probabilistic temperature forecastsOct 04 2003Probabilistic temperature forecasts are potentially useful to the energy and weather derivatives industries. However, at present, they are little used. There are a number of reasons for this, but we believe this is in part due to inadequacies in the methodologies ... More
Detecting highly cyclic structure with complex eigenpairsAug 24 2016Many large, real-world complex networks have rich community structure that a network scientist seeks to understand. These communities may overlap or have intricate internal structure. Extracting communities with particular topological structure, even ... More
Merger Signatures in the Galaxy Cluster Abell 98Jul 10 2014We present results from Chandra and XMM-Newton observations of Abell 98 (A98), a galaxy cluster with three major components: a relatively bright subcluster to the north (A98N), a disturbed subcluster to the south (A98S), and a fainter subcluster to the ... More
The Wyoming Survey for H-alpha. I. Initial Results at z ~ 0.16 and 0.24Feb 05 2008The Wyoming Survey for H-alpha, or WySH, is a large-area, ground-based, narrowband imaging survey for H-alpha-emitting galaxies over the latter half of the age of the Universe. The survey spans several square degrees in a set of fields of low Galactic ... More
Dynamic nuclear polarization in a magnetic resonance force microscope experimentJan 27 2016Feb 18 2016We report achieving enhanced nuclear magnetization in a magnetic resonance force microscope experiment at 0.6 tesla and 4.2 kelvin using the dynamic nuclear polarization (DNP) effect. In our experiments a microwire coplanar waveguide delivered radiowaves ... More
Filling area conjecture, optimal systolic inequalities, and the fiber class in abelian coversDec 01 2004Sep 23 2005We investigate the filling area conjecture, optimal systolic inequalities, and the related problem of the nonvanishing of certain linking numbers in 3-manifolds.
Multiplicity free Schur, skew Schur, and quasisymmetric Schur functionsMay 21 2011Mar 02 2012In this paper we classify all Schur functions and skew Schur functions that are multiplicity free when expanded in the basis of fundamental quasisymmetric functions, termed F-multiplicity free. Combinatorially, this is equivalent to classifying all skew ... More
Logarithmically spiraling helicoidsApr 28 2014Apr 29 2014We construct helicoid-like embedded minimal disks with axes along self-similar curves modeled on logarithmic spirals. The surfaces have a self-similarity inherited from the curves and the nature of the construction. Moreover, inside of a "logarithmic ... More
Stein compacts in Levi-flat hypersurfacesOct 18 2004Jun 14 2006We explore connections between geometric properties of the Levi foliation of a Levi-flat hypersurface M and holomorphic convexity of compact sets in M, or bounded in part by M. Applications include extendability of Cauchy-Riemann functions, solvability ... More
The Design of a Community Science Cloud: The Open Science Data Cloud PerspectiveJan 03 2016In this paper we describe the design, and implementation of the Open Science Data Cloud, or OSDC. The goal of the OSDC is to provide petabyte-scale data cloud infrastructure and related services for scientists working with large quantities of data. Currently, ... More
The orbits of 48 globular clusters in a Milky-Way-Like Barred GalaxySep 13 2006The effect of a barred potential (such as the one of the Milky Way) on the galactic orbits of forty-eight globular clusters for which absolute proper motions are known is studied. The orbital characteristics are compared with those obtained for the case ... More
Testing uniformity on high-dimensional spheres against monotone rotationally symmetric alternativesFeb 07 2015Apr 27 2016We consider the problem of testing uniformity on high-dimensional unit spheres. We are primarily interested in non-null issues. We show that rotationally symmetric alternatives lead to two Local Asymptotic Normality (LAN) structures. The first one is ... More
Geometry-Aware Neighborhood Search for Learning Local Models for Image ReconstructionMay 06 2015Jan 05 2016Local learning of sparse image models has proven to be very effective to solve inverse problems in many computer vision applications. To learn such models, the data samples are often clustered using the K-means algorithm with the Euclidean distance as ... More
Revisiting Kneser's Theorem for Field ExtensionsOct 05 2015A Theorem of Hou, Leung and Xiang generalised Kneser's addition Theorem to field extensions. This theorem was known to be valid only in separable extensions, and it was a conjecture of Hou that it should be valid for all extensions. We give an alternative ... More
Outlier robust corner-preserving methods for reconstructing noisy imagesAug 03 2007The ability to remove a large amount of noise and the ability to preserve most structure are desirable properties of an image smoother. Unfortunately, they usually seem to be at odds with each other; one can only improve one property at the cost of the ... More
Pseudocodewords of Tanner graphsApr 05 2005Aug 18 2007This papers presents a detailed analysis of pseudocodewords of Tanner graphs. Pseudocodewords arising on the iterative decoder's computation tree are distinguished from pseudocodewords arising on finite degree lifts. Lower bounds on the minimum pseudocodeword ... More
Residue symbols and Jantzen-Seitz partitionsJul 29 1997Jantzen-Seitz partitions are those $p$-regular partitions of~$n$ which label $p$-modular irreducible representations of the symmetric group $S_n$ which remain irreducible when restricted to $S_{n-1}$; they have recently also been found to be important ... More
Generalized Fibonacci recurrences and the lex-least De Bruijn sequenceMar 30 2010The skew of a binary string is the difference between the number of zeroes and the number of ones, while the length of the string is the sum of these two numbers. We consider certain suffixes of the lexicographically-least de Bruijn sequence at natural ... More
Prominent but Less Productive: The Impact of Interdisciplinarity on Scientists' ResearchOct 23 2015Inter-disciplinary research (IDR) is being promoted by federal agencies and universities nationwide because it presumably spurs transformative, innovative science. In this paper we bring empirical data to assess whether IDR is indeed beneficial, and whether ... More
Self-gravitating stellar collapse: explicit geodesics and path integrationJan 18 2015Nov 13 2015We extend the work of Oppenheimer & Synder to model the gravitation collapse of a star to a black hole within classical general relativity, removing the assumption that the stellar surface is initially at rest. We derive closed-form solutions for classical ... More
Lessons from the CoinseminarFeb 18 2015This paper describes lessons learned from teaching a distributed virtual course on COINs (Collaborative Innovation Networks) over the last 12 years at five different sites located in four different time zones.
Nuclear Masses in AstrophysicsDec 09 2008Among all nuclear ground-state properties, atomic masses are highly specific for each particular combination of N and Z and the data obtained apply to a variety of physics topics. One of the most crucial questions to be addressed in mass spectrometry ... More
Dark Matter Searches with the Fermi Large Area TelescopeApr 15 2009The Fermi Gamma-Ray Space Telescope, successfully launched on June 11th, 2008, is the next generation satellite experiment for high-energy gamma-ray astronomy. The main instrument, the Fermi Large Area Telescope (LAT), with a wide field of view (> 2 sr), ... More
Generalized frieze pattern determinants and higher angulations of polygonsMay 06 2013Jun 16 2014Frieze patterns (in the sense of Conway and Coxeter) are in close connection to triangulations of polygons. Broline, Crowe and Isaacs have assigned a symmetric matrix to each polygon triangulation and computed the determinant. In this paper we consider ... More
The $Z$ decay width in the SMEFT: $y_t$ and $λ$ corrections at one loopNov 29 2016We calculate one loop $y_t$ and $\lambda$ dependent corrections to $\bar{\Gamma}_Z,\bar{R}_f^0$ and the partial $Z$ widths due to dimension six operators in the Standard Model Effective Field Theory (SMEFT), including finite terms. We assume $\rm CP$ ... More
Translating UML State Machines to Coloured Petri Nets Using Acceleo: A ReportMay 06 2014UML state machines are widely used to specify dynamic systems behaviours. However its semantics is described informally, thus preventing the application of model checking techniques that could guarantee the system safety. In a former work, we proposed ... More
Women in physics in the United States: recruitment and retentionFeb 24 2016Initiatives to increase the number, persistence, and success of women in physics in the US reach pre-teen girls through senior women. Programs exist at both the local and national levels. In addition, researchers have investigated issues related to gender ... More
On the edge capacitated Steiner tree problemJul 24 2016Given a graph G = (V,E) with a root r in V, positive capacities {c(e)|e in E}, and non-negative lengths {l(e)|e in E}, the minimum-length (rooted) edge capacitated Steiner tree problem is to find a tree in G of minimum total length, rooted at r, spanning ... More
Blind Signal Separation Methods for the Identification of Interstellar Carbonaceous NanoparticlesSep 21 2007Sep 27 2007The use of Blind Signal Separation methods (ICA and other approaches) for the analysis of astrophysical data remains quite unexplored. In this paper, we present a new approach for analyzing the infrared emission spectra of interstellar dust, obtained ... More
Dark Energy and Doubly Coupled BigravityJun 17 2016Nov 04 2016We analyse the late time cosmology and the gravitational properties of doubly coupled bigravity in the constrained vielbein formalism (equivalent to the metric formalism) when the mass of the massive graviton is of the order of the present Hubble rate. ... More
Geometric approaches to the thermodynamics of black holesMar 31 2016May 30 2016In this summary, we present the main topics of the talks presented in the parallel session "Black holes - 5" of the 14th Marcel Grossmann Meeting held in Rome, Italy in July 2015. We first present a short review of the main approaches used to understand ... More
Formation of Topological Defects in a Second Order Phase TransitionMar 11 1994The classical evolution equations of the Abelian Higgs model are studied at temperatures below the Ginsburg temperature of a phase transition which is assumed to be second order. It is shown that the initial thermal fluctuations provide a domain structure ... More
Cohomology rings of certain seven dimensional manifoldsOct 11 2008Dec 08 2008We calculate the cohomology rings of a collection of seven dimensional manifolds supporting an S^3 x S^3-action with one dimensional orbit space. These manifolds are of interest to differential geometers studying non-negative and positive sectional curvature. ... More
Investigating the importance of edge-structure in the loss of H/H2 of PAH cations: the case of dibenzopyrene isomersNov 08 2017We present a detailed study of the main dehydrogenation processes of two dibenzopyrene cation (C24H14+) isomers, namely dibenzo(a,e)pyrene (AE+) and dibenzo(a,l)pyrene (AL+). First, action spectroscopy under VUV photons was performed using synchrotron ... More
Variational Data Assimilation for Optimizing Boundary Conditions in Ocean ModelsJan 06 2016The review describes the development of ideas Gury Ivanovich Marchuk in the field of variational data assimilation for ocean models applied in particular in coupled models for long-range weather forecasts. Particular attention is paid to the optimization ... More
Anyonic Partition Functions and Windings of Planar Brownian MotionJul 13 1994The computation of the $N$-cycle brownian paths contribution $F_N(\alpha)$ to the $N$-anyon partition function is adressed. A detailed numerical analysis based on random walk on a lattice indicates that $F_N^{(0)}(\alpha)= \prod_{k=1}^{N-1}(1-{N\over ... More
A Multistage Stochastic Programming Approach to the Dynamic and Stochastic VRPTW - Extended versionFeb 06 2015We consider a dynamic vehicle routing problem with time windows and stochastic customers (DS-VRPTW), such that customers may request for services as vehicles have already started their tours. To solve this problem, the goal is to provide a decision rule ... More
Hidden timescale in the response of harmonically driven chaotic systemsMar 20 2016Linear response theory relates the response of a system to the power-spectrum of its fluctuations. However, the response to external driving in realistic models exhibits a pronounced non-linear blurring of the spectral line-shape. Considering a driven ... More
Crosscap numbers and the Jones polynomialAug 19 2014Sep 22 2015We give sharp two-sided linear bounds of the crosscap number (non-orientable genus) of alternating links in terms of their Jones polynomial. Our estimates are often exact and we use them to calculate the crosscap numbers for several infinite families ... More
All SL_2-tilings come from infinite triangulationsMar 30 2016An SL_2-tiling is a bi-infinite matrix of positive integers such that each adjacent 2 by 2 submatrix has determinant 1. Such tilings are infinite analogues of Conway-Coxeter friezes, and they have strong links to cluster algebras, combinatorics, mathematical ... More
Three flavors of extremal Betti tablesJul 24 2012We discuss extremal Betti tables of resolutions in three different contexts. We begin over the graded polynomial ring, where extremal Betti tables correspond to pure resolutions. We then contrast this behavior with that of extremal Betti tables over regular ... More