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1013940 | 0911.0054 | 2009-10-31 | Learning Exponential Families in High-Dimensions: Strong Convexity and Sparsity | The versatility of exponential families, along with their attendant convexity properties, make them a popular and effective statistical model. A central issue is learning these models in high-dimensions, such as when there is some sparsity pattern of the optimal parameter. This work characterizes a certain strong conve... | [
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2189987 | 0911.0105 | 2009-10-31 | Functions Definable by Numerical Set-Expressions | A "numerical set-expression" is a term specifying a cascade of arithmetic and logical operations to be performed on sets of non-negative integers. If these operations are confined to the usual Boolean operations together with the result of lifting addition to the level of sets, we speak of "additive circuits". If they ... | [
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55030154 | 0911.0323 | 2009-11-01 | The case for a directional dark matter detector and the status of current experimental efforts | We present the case for a dark matter detector with directional sensitivity. This document was developed at the 2009 CYGNUS workshop on directional dark matter detection, and contains contributions from theorists and experimental groups in the field. We describe the need for a dark matter detector with directional sens... | [
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56404045 | 0911.0173 | 2009-11-01 | Dynamics of Simple Cracks | Cracks are the major vehicle for material failure, and often exhibit rather complex dynamics. The laws that govern their motion have remained an object of constant study for nearly a century. The simplest kind of dynamic crack is a single crack that moves along a straight line. We first briefly review current understan... | [
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119306761 | 0911.0211 | 2009-11-01 | Large deviations and ensembles of trajectories in stochastic models | We consider ensembles of trajectories associated with large deviations of time-integrated quantities in stochastic models. Motivated by proposals that these ensembles are relevant for physical processes such as shearing and glassy relaxation, we show how they can be generated directly using auxiliary stochastic process... | [
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18180179 | 0911.0215 | 2009-11-01 | Age, Sex, and Genetic Architecture of Human Gene Expression in EBV Transformed Cell Lines | Individual expression profiles from EBV transformed cell lines are an emerging resource for genomic investigation. In this study we characterize the effects of age, sex, and genetic variation on gene expression by surveying public datasets of such profiles. We establish that the expression space of cell lines maintains... | [
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11400228 | 0911.0136 | 2009-11-01 | Checking Behavioral Consistency Constraints for Pervasive Context in Asynchronous Environments | Context consistency checking, the checking of specified constraint on properties of contexts, is essential to context-aware applications. In order to delineate and adapt to dynamic changes in the pervasive computing environment, context-aware applications often need to specify and check behavioral consistency constrain... | [
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14987 | 0911.0492 | 2009-11-02 | PARNES: A rapidly convergent algorithm for accurate recovery of sparse and approximately sparse signals | In this article, we propose an algorithm, NESTA-LASSO, for the LASSO problem, i.e., an underdetermined linear least-squares problem with a 1-norm constraint on the solution. We prove under the assumption of the restricted isometry property (RIP) and a sparsity condition on the solution, that NESTA-LASSO is guaranteed t... | [
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14556053 | 0911.0465 | 2009-11-02 | A Simple Conceptual Generator for the Internet Graph | The evolution of the Internet during the last years, has lead to a dramatic increase of the size of its graph at the Autonomous System (AS) level. Soon - if not already - its size will make the latter impractical for use from the research community, e.g. for protocol testing. Reproducing a smaller size, snapshot of the... | [
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18865705 | 0911.0257 | 2009-11-02 | Spatial games and global optimization for mobile association problems | The basic optimal transportation problem consists in finding the most effective way of moving masses from one location to another, while minimizing the transportation cost. Such concept has been found to be useful to understand various mathematical, economical, and control theory phenomena, such as Witsenhausen's count... | [
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92056232 | 0911.0224 | 2009-11-02 | Study of Diketo-Pyrrolo-Pyrrole Polymers for Photovoltaic Applications | Using density-functional theory with the hybrid functional B3LYP, we investigate the electronic properties of polymers with diketo-pyrrolo-pyrrole (DPP) unit. We note that some of the polymers studied have LUCO energy similar to the C70-PCBM, or even lower, making them promising candidates for electron transport in org... | [
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266214 | 0911.0488 | 2009-11-02 | SOAP Serialization Performance Enhancement, Design And Implementation Of A Middleware | The most straightforward way to improve performance of any system is to define the bottlenecks and think of ways to remove them. Web services are the inseparable part of any web application, as a result enhancing performance of web services will have a great effect on the overall performance of the system. The most wid... | [
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115158904 | 0911.0185 | 2009-11-02 | Spectral reciprocity and matrix representations of unbounded operators | Motivated by potential theory on discrete spaces, we study a family of unbounded Hermitian operators in Hilbert space which generalize the usual graph-theoretic discrete Laplacian. These operators are discrete analogues of the classical conformal Laplacians and Hamiltonians from statistical mechanics. For an infinite d... | [
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16784254 | 0911.0373 | 2009-11-02 | Analyticity of the Wiener-Hopf factors and valuation of exotic options in L\'evy models | This paper considers the valuation of exotic path-dependent options in L\'evy models, in particular options on the supremum and the infimum of the asset price process. Using the Wiener--Hopf factorization, we derive expressions for the analytically extended characteristic function of the supremum and the infimum of a L... | [
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119183981 | 0911.0288 | 2009-11-02 | Classifying LISA gravitational wave burst signals using Bayesian evidence | We consider the problem of characterisation of burst sources detected with the Laser Interferometer Space Antenna (LISA) using the multi-modal nested sampling algorithm, MultiNest. We use MultiNest as a tool to search for modelled bursts from cosmic string cusps, and compute the Bayesian evidence associated with the co... | [
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17602799 | 0911.0280 | 2009-11-02 | Causal Inference on Discrete Data using Additive Noise Models | Inferring the causal structure of a set of random variables from a finite sample of the joint distribution is an important problem in science. Recently, methods using additive noise models have been suggested to approach the case of continuous variables. In many situations, however, the variables of interest are discre... | [
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119287307 | 0911.0017 | 2009-11-02 | Structure formation from non-Gaussian initial conditions: multivariate biasing, statistics, and comparison with N-body simulations | We study structure formation in the presence of primordial non-Gaussianity of the local type with parameters f_NL and g_NL. We show that the distribution of dark-matter halos is naturally described by a multivariate bias scheme where the halo overdensity depends not only on the underlying matter density fluctuation del... | [
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118783621 | 0911.0400 | 2009-11-02 | Emergent Quantum Near-Criticality from Baryonic Black Branes | We find new black 3-brane solutions describing the "conifold gauge theory" at nonzero temperature and baryonic chemical potential. Of particular interest is the low-temperature limit where we find a new kind of weakly curved near-horizon geometry; it is a warped product AdS_2 x R^3 x T^{1,1} with warp factors that are ... | [
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118669010 | 0911.0392 | 2009-11-02 | Active Galactic Nuclei in Groups and Clusters of Galaxies: Detection and Host Morphology | The incidence and properties of Active Galactic Nuclei (AGN) in the field, groups, and clusters can provide new information about how these objects are triggered and fueled, similar to how these environments have been employed to study galaxy evolution. We have obtained new XMM-Newton observations of seven X-ray select... | [
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7123847 | 0911.0555 | 2009-11-03 | DNA nanotweezers studied with a coarse-grained model of DNA | We introduce a coarse-grained rigid nucleotide model of DNA that reproduces the basic thermodynamics of short strands: duplex hybridization, single-stranded stacking and hairpin formation, and also captures the essential structural properties of DNA: the helical pitch, persistence length and torsional stiffness of doub... | [
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17269913 | 0911.0650 | 2009-11-03 | Adaptive BLASTing through the Sequence Dataspace: Theories on Protein Sequence Embedding | We theorize that phylogenetic profiles provide a quantitative method that can relate the structural and functional properties of proteins, as well as their evolutionary relationships. A key feature of phylogenetic profiles is the interoperable data format (e.g. alignment information, physiochemical information, genomic... | [
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13995410 | 0911.0556 | 2009-11-03 | Thermodynamics of Quantum Jump Trajectories | We apply the large-deviation method to study trajectories in dissipative quantum systems. We show that in the long time limit the statistics of quantum jumps can be understood from thermodynamic arguments by exploiting the analogy between large-deviation and free-energy functions. This approach is particularly useful f... | [
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117902824 | 0911.0476 | 2009-11-03 | Analytic Solution to Clustering Coefficients on Weighted Networks | Clustering coefficient is an important topological feature of complex networks. It is, however, an open question to give out its analytic expression on weighted networks yet. Here we applied an extended mean-field approach to investigate clustering coefficients in the typical weighted networks proposed by Barrat, Barth... | [
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... | null |
154420813 | 0911.0562 | 2009-11-03 | A remark on Gatheral's 'most-likely path approximation' of implied volatility | We give a new proof of the representation of implied volatility as a time-average of weighted expectations of local or stochastic volatility. With this proof we clarify the question of existence of 'forward implied variance' in the original derivation of Gatheral, who introduced this representation in his book 'The Vol... | [
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490776 | 0911.0547 | 2009-11-03 | On Element SDD Approximability | This short communication shows that in some cases scalar elliptic finite element matrices cannot be approximated well by an SDD matrix. We also give a theoretical analysis of a simple heuristic method for approximating an element by an SDD matrix. | [
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117710936 | 0911.0417 | 2009-11-03 | Evolution of the Halpha luminosity function | The Smithsonian Hectospec Lensing Survey (SHELS) is a window on the star formation history over the last 4 Gyr. SHELS is a spectroscopically complete survey for Rtot < 20.3 over 4 square degrees. We use the 10k spectra to select a sample of pure star forming galaxies based on their Halpha emission line. We use the spec... | [
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12756653 | 0911.0581 | 2009-11-03 | Fast Decoders for Topological Quantum Codes | We present a family of algorithms, combining real-space renormalization methods and belief propagation, to estimate the free energy of a topologically ordered system in the presence of defects. Such an algorithm is needed to preserve the quantum information stored in the ground space of a topologically ordered system a... | [
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14922656 | 0911.0517 | 2009-11-03 | The Geometry of Manipulation - a Quantitative Proof of the Gibbard Satterthwaite Theorem | We prove a quantitative version of the Gibbard-Satterthwaite theorem. We show that a uniformly chosen voter profile for a neutral social choice function f of $q \ge 4$ alternatives and n voters will be manipulable with probability at least $10^{-4} \eps^2 n^{-3} q^{-30}$, where $\eps$ is the minimal statistical distanc... | [
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118859322 | 0911.0685 | 2009-11-03 | Redshift Evolution in Black Hole-Bulge Relations: Testing CIV-based Black Hole Masses | We re-examine claims of redshift evolution in black hole-bulge scaling relations based on lensed quasars. In particular, we refine the black hole mass estimates using measurements of Balmer lines from near-infrared spectroscopy obtained with Triplespec at Apache Point Observatory. In support of previous work, we find a... | [
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1881928 | 0911.0491 | 2009-11-03 | Slow Learners are Fast | Online learning algorithms have impressive convergence properties when it comes to risk minimization and convex games on very large problems. However, they are inherently sequential in their design which prevents them from taking advantage of modern multi-core architectures. In this paper we prove that online learning ... | [
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14403897 | 0911.0737 | 2009-11-03 | Multiple Description Coding of Discrete Ergodic Sources | We investigate the problem of Multiple Description (MD) coding of discrete ergodic processes. We introduce the notion of MD stationary coding, and characterize its relationship to the conventional block MD coding. In stationary coding, in addition to the two rate constraints normally considered in the MD problem, we co... | [
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115173011 | 0911.0600 | 2009-11-03 | Concentration of the adjacency matrix and of the Laplacian in random graphs with independent edges | Consider any random graph model where potential edges appear independently, with possibly different probabilities, and assume that the minimum expected degree is omega(ln n). We prove that the adjacency matrix and the Laplacian of that random graph are concentrated around the corresponding matrices of the weighted grap... | [
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28366095 | 0911.0953 | 2009-11-04 | Narrowband nanomechanical mass measurement using nonlinear response of a graphene membrane | We propose a scheme to measure the mass of a single particle using the nonlinear response of a 2D nanoresonator with degenerate eigenmodes. Using numerical and analytical calculations, we show that by driving a square graphene nanoresonator into the nonlinear regime, simultaneous determination of the mass and position ... | [
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10392109 | 0911.0801 | 2009-11-04 | Tractable hypergraph properties for constraint satisfaction and conjunctive queries | An important question in the study of constraint satisfaction problems (CSP) is understanding how the graph or hypergraph describing the incidence structure of the constraints influences the complexity of the problem. For binary CSP instances (i.e., where each constraint involves only two variables), the situation is w... | [
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8082419 | 0911.0736 | 2009-11-04 | A simple proof that random matrices are democratic | The recently introduced theory of compressive sensing (CS) enables the reconstruction of sparse or compressible signals from a small set of nonadaptive, linear measurements. If properly chosen, the number of measurements can be significantly smaller than the ambient dimension of the signal and yet preserve the signific... | [
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"math.IT"
] | null | [
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{
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"author_id": "j laska_0",
"name": "Jason [\"N.\"] Laska",
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60750507 | 0911.0837 | 2009-11-04 | Validation of a New Method for Stroke Volume Variation Assessment: a Comparaison with the PiCCO Technique | This paper proposes a novel, simple and minimally invasive method for stroke volume variation assessment using arterial blood pressure measurements. The arterial blood pressure signal is reconstructed using a semi-classical signal analysis method allowing the computation of a parameter, called the first systolic invari... | [
"physics.med-ph",
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{
"author_id": "c m'edigue_0",
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"... | null |
119184897 | 0911.0856 | 2009-11-04 | Resonant Excitation of Shear Alfv\'en Perturbations by Trapped Energetic Ions in a Tokamak | A new analytic expression is derived for the resonant drive of high n Alfvenic modes by particles accelerated to high energy by Ion Cyclotron Resonance Heating. This derivation includes finite orbit effects, and the formalism is completely non-perturbative. The high-n limit is used to calculate the complex particle res... | [
"physics.plasm-ph"
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{
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15509676 | 0911.0836 | 2009-11-04 | Signal Analysis by Expansion Over the Squared Eigenfunctions of an Associated Schr\"odinger Operator | This article introduces a new signal analysis method. The main idea consists in interpreting a pulse-shaped signal, after multiplying it by a positive parameter, as a potential of a Schr\"odinger operator and representing this signal with the discrete spectrum of this operator. We present some results obtained in the a... | [
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{
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"name": "Emmanuelle Cr'epeau",
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... | null |
4422225 | 0911.0747 | 2009-11-04 | Exploring the Thermodynamics of a Universal Fermi Gas | From sand piles to electrons in metals, one of the greatest challenges in modern physics is to understand the behavior of an ensemble of strongly interacting particles. A class of quantum many-body systems such as neutron matter and cold Fermi gases share the same universal thermodynamic properties when interactions re... | [
"cond-mat.quant-gas",
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1309564 | 0911.0996 | 2009-11-05 | The Need for Structure in Quantum Speedups | Is there a general theorem that tells us when we can hope for exponential speedups from quantum algorithms, and when we cannot? In this paper, we make two advances toward such a theorem, in the black-box model where most quantum algorithms operate. First, we show that for any problem that is invariant under permuting i... | [
"quant-ph",
"cs.CC"
] | null | [
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] | null | null | null |
510673 | 0911.1034 | 2009-11-05 | Effective zero-thickness model for a conductive membrane driven by an electric field | The behavior of a conductive membrane in a static (DC) electric field is investigated theoretically. An effective zero-thickness model is constructed based on a Robin-type boundary condition for the electric potential at the membrane, originally developed for electrochemical systems. Within such a framework, correction... | [
"cond-mat.soft"
] | null | [
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{
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"name": "Martin [\"Z.\"] Bazant",
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9493648 | 0911.1072 | 2009-11-05 | Error Correcting Coding for a Non-symmetric Ternary Channel | Ternary channels can be used to model the behavior of some memory devices, where information is stored in three different levels. In this paper, error correcting coding for a ternary channel where some of the error transitions are not allowed, is considered. The resulting channel is non-symmetric, therefore classical l... | [
"cs.IT",
"math.IT"
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{
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"name": "Alexandre [\"Graell\",\"i\"] Amat",
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119166813 | 0911.1120 | 2009-11-05 | Freeze-In Production of FIMP Dark Matter | We propose an alternate, calculable mechanism of dark matter genesis, "thermal freeze-in," involving a Feebly Interacting Massive Particle (FIMP) interacting so feebly with the thermal bath that it never attains thermal equilibrium. As with the conventional "thermal freeze-out" production mechanism, the relic abundance... | [
"hep-ph",
"astro-ph.CO"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
88512322 | 0911.1015 | 2009-11-05 | Extreme-Value Copulas | Being the limits of copulas of componentwise maxima in independent random samples, extreme-value copulas can be considered to provide appropriate models for the dependence structure between rare events. Extreme-value copulas not only arise naturally in the domain of extreme-value theory, they can also be a convenient c... | [
"math.ST",
"stat.TH"
] | null | [
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] | null | null | null |
6503702 | 0911.1084 | 2009-11-05 | Measuring social dynamics in a massive multiplayer online game | Quantification of human group-behavior has so far defied an empirical, falsifiable approach. This is due to tremendous difficulties in data acquisition of social systems. Massive multiplayer online games (MMOG) provide a fascinating new way of observing hundreds of thousands of simultaneously socially interacting indiv... | [
"physics.soc-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
2213391 | 0911.1112 | 2009-11-05 | Memento: Time Travel for the Web | The Web is ephemeral. Many resources have representations that change over time, and many of those representations are lost forever. A lucky few manage to reappear as archived resources that carry their own URIs. For example, some content management systems maintain version pages that reflect a frozen prior state of th... | [
"cs.IR",
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] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
2596061 | 0911.1174 | 2009-11-05 | Sharp Dichotomies for Regret Minimization in Metric Spaces | The Lipschitz multi-armed bandit (MAB) problem generalizes the classical multi-armed bandit problem by assuming one is given side information consisting of a priori upper bounds on the difference in expected payoff between certain pairs of strategies. Classical results of (Lai and Robbins 1985) and (Auer et al. 2002) i... | [
"cs.DS",
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{
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{
"author_id": "a slivkins_2",
"name": "Aleksandrs Slivkins",
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... | null |
4384198 | 0911.0926 | 2009-11-05 | Sub-luminous type Ia supernovae from the mergers of equal-mass white dwarfs with M~0.9 M_sun | Type Ia supernovae (SNe Ia) are thought to result from thermonuclear explosions of carbon-oxygen white dwarf stars. Existing models generally explain the observed properties, with the exception of the sub-luminous 1991-bg-like supernovae. It has long been suspected that the merger of two white dwarfs could give rise to... | [
"astro-ph.HE"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
16978487 | 0911.1269 | 2009-11-06 | A generalization of Hungarian method and Hall's theorem with applications in wireless sensor networks | In this paper, we consider various problems concerning quasi-matchings and semi-matchings in bipartite graphs, which generalize the classical problem of determining a perfect matching in bipartite graphs. We prove a vast generalization of Hall's marriage theorem, and present an algorithm that solves the problem of dete... | [
"math.CO"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
115621171 | 0911.1275 | 2009-11-06 | Continuity of mutual entropy in the large signal-to-noise ratio limit | This article addresses the issue of the proof of the entropy power inequality (EPI), an important tool in the analysis of Gaussian channels of information transmission, proposed by Shannon. We analyse continuity properties of the mutual entropy of the input and output signals in an additive memoryless channel and discu... | [
"cs.IT",
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"math.IT",
"math.PR"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
380109 | 0911.1368 | 2009-11-06 | Performance Bounds for Expander-based Compressed Sensing in the presence of Poisson Noise | This paper provides performance bounds for compressed sensing in the presence of Poisson noise using expander graphs. The Poisson noise model is appropriate for a variety of applications, including low-light imaging and digital streaming, where the signal-independent and/or bounded noise models used in the compressed s... | [
"cs.IT",
"math.IT"
] | null | [
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{
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"name": "Rebecca [\"M.\"] Willett",
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12987949 | 0911.1328 | 2009-11-06 | Effective slip boundary conditions for arbitrary periodic surfaces: The surface mobility tensor | In a variety of applications, most notably microfluidic design, slip-based boundary conditions have been sought to characterize fluid flow over patterned surfaces. We focus on laminar shear flows over surfaces with periodic height fluctuations and/or fluctuating Navier scalar slip properties. We derive a general formul... | [
"physics.flu-dyn"
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"name": "Martin [\"Z.\"] Bazant",
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62792610 | 0911.1248 | 2009-11-06 | Microstructures and Mechanical Properties of Dense Particle Gels: Microstructural Characterization | The macroscopic mechanical properties of densely packed coagulated colloidal particle gels strongly depend on the local arrangement of the powder particles on length scales of a few particle diameters. Heterogeneous microstructures exhibit up to one order of magnitude higher elastic properties and yield strengths than ... | [
"cond-mat.soft",
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] | null | [
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{
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"name": "Frank [\"Thomas\"] Filser",
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118554352 | 0911.1295 | 2009-11-06 | Quantum Coins | One of the earliest cryptographic applications of quantum information was to create quantum digital cash that could not be counterfeited. In this paper, we describe a new type of quantum money: quantum coins, where all coins of the same denomination are represented by identical quantum states. We state desirable securi... | [
"quant-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
11679988 | 0911.1262 | 2009-11-06 | Point target detection and subpixel position estimation in optical imagery | This paper addresses the issue of detecting point objects in a clutter background and estimating their position by image processing. We are interested in the specific context where the object signature significantly varies with its random subpixel location because of aliasing. Conventional matched filter neglects this ... | [
"stat.AP"
] | null | [
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{
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{
"author_id": "f champagnat_1",
"name": "Frédéric Champagnat",
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44226752 | 0911.1362 | 2009-11-07 | Necessary Condition for the Quantum Adiabatic Approximation | A gapped quantum system that is adiabatically perturbed remains approximately in its eigenstate after the evolution. We prove that, for constant gap, general quantum processes that approximately prepare the final eigenstate require a minimum time proportional to the ratio of the length of the eigenstate path to the gap... | [
"quant-ph",
"cond-mat.other"
] | null | [
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{
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"name": "Rolando [\"D\"] Somma",
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1460452 | 0911.1393 | 2009-11-07 | Most tensor problems are NP-hard | We prove that multilinear (tensor) analogues of many efficiently computable problems in numerical linear algebra are NP-hard. Our list here includes: determining the feasibility of a system of bilinear equations, deciding whether a 3-tensor possesses a given eigenvalue, singular value, or spectral norm; approximating a... | [
"cs.CC",
"cs.NA",
"math.NA"
] | null | [
"target.author.publication_history.key_reference",
"target.key_reference"
] | null | null | null |
15448503 | 0911.1564 | 2009-11-08 | New Bounds for Restricted Isometry Constants | In this paper we show that if the restricted isometry constant $\delta_k$ of the compressed sensing matrix satisfies \[ \delta_k < 0.307, \] then $k$-sparse signals are guaranteed to be recovered exactly via $\ell_1$ minimization when no noise is present and $k$-sparse signals can be estimated stably in the noisy case.... | [
"cs.IT",
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] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
21935731 | 1009.2038 | 2009-11-08 | Exterior cloaking with active sources in two dimensional acoustics | We cloak a region from a known incident wave by surrounding the region with three or more devices that cancel out the field in the cloaked region without significantly radiating waves. Since very little waves reach scatterers within the cloaked region, the scattered field is small and the scatterers are for all practic... | [
"math-ph",
"math.MP"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
6863191 | 0911.1551 | 2009-11-08 | Elusive Glassy Phase in the Random Field Ising Model | We consider the random field Ising model and show rigorously that the spin glass susceptibility at equilibrium is always bounded by the ferromagnetic susceptibility, and therefore that no spin glass phase can be present at equilibrium out of the ferromagnet critical line. When the magnetization is, however, fixed to va... | [
"cond-mat.dis-nn",
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] | null | [
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{
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{
"author_id": "f ricci-tersenghi_1",
"name": "Federico Ricci-Tersenghi",
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... | null |
8576389 | 0911.1536 | 2009-11-08 | Parallel Proximal Algorithm for Image Restoration Using Hybrid Regularization -- Extended Version | Regularization approaches have demonstrated their effectiveness for solving ill-posed problems. However, in the context of variational restoration methods, a challenging question remains, which is how to find a good regularizer. While total variation introduces staircase effects, wavelet domain regularization brings ot... | [
"math.OC"
] | null | [
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{
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{
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{
"author_id": "c chaux_1",
"name": "Caroline Chaux",
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"num_papers": null... | null |
8133224 | 0911.1583 | 2009-11-08 | Modeling public mood and emotion: Twitter sentiment and socio-economic phenomena | Microblogging is a form of online communication by which users broadcast brief text updates, also known as tweets, to the public or a selected circle of contacts. A variegated mosaic of microblogging uses has emerged since the launch of Twitter in 2006: daily chatter, conversation, information sharing, and news comment... | [
"cs.CY"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
52243081 | 0911.1669 | 2009-11-09 | Nonequilibrium dynamics of a stochastic model of anomalous heat transport | We study the dynamics of covariances in a chain of harmonic oscillators with conservative noise in contact with two stochastic Langevin heat baths. The noise amounts to random collisions between nearest-neighbour oscillators that exchange their momenta. In a recent paper, [S Lepri et al. J. Phys. A: Math. Theor. 42 (20... | [
"cond-mat.stat-mech"
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{
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{
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{
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{
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"name": "Stefano Lepri",
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... | null |
16943113 | 0911.1624 | 2009-11-09 | Simulating quantum computers with probabilistic methods | We investigate the boundary between classical and quantum computational power. This work consists of two parts. First we develop new classical simulation algorithms that are centered on sampling methods. Using these techniques we generate new classes of classically simulatable quantum circuits where standard techniques... | [
"quant-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
56277788 | 0911.1781 | 2009-11-09 | The Discovery of Binary White Dwarfs that will Merge within 500 Myr | We present radial velocity observations of four extremely low-mass (0.2 Msol) white dwarfs. All four stars show peak-to-peak radial velocity variations of 540 - 710 km/s with 1.0 - 5.9 hr periods. The optical photometry rules out main-sequence companions. In addition, no milli-second pulsar companions are detected in r... | [
"astro-ph.SR",
"astro-ph.GA"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
196132785 | 0911.1708 | 2009-11-09 | Different goals in multiscale simulations and how to reach them | In this paper we sum up our works on multiscale programs, mainly simulations. We first start with describing what multiscaling is about, how it helps perceiving signal from a background noise in a ?ow of data for example, for a direct perception by a user or for a further use by another program. We then give three exam... | [
"cs.AI",
"nlin.AO"
] | null | [
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] | [] | [
{
"author_id": "p tranouez_1",
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{
"author_id": "a dutot_1",
"name": "Antoine Dutot",
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"num_papers": null... | null |
118658877 | 0911.1711 | 2009-11-09 | A New Class of Exact Hairy Black Hole Solutions | We present a new class of black hole solutions with minimally coupled scalar field in the presence of a negative cosmological constant. We consider a one-parameter family of self-interaction potentials parametrized by a dimensionless parameter $g$. When $g=0$, we recover the conformally invariant solution of the Martin... | [
"hep-th",
"gr-qc"
] | null | [
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] | [
{
"corpus_id": "15521567",
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{
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{
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{
"author_id": "g koutsoumbas_1",
"name": "George Koutsoumbas",
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"h_index": null,
"num... | null |
11824028 | 0911.1601 | 2009-11-09 | Geometric influences | We present a new definition of influences in product spaces of continuous distributions. Our definition is geometric, and for monotone sets it is identical with the measure of the boundary with respect to uniform enlargement. We prove analogs of the Kahn-Kalai-Linial (KKL) and Talagrand's influence sum bounds for the n... | [
"math.PR",
"math.FA"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "n keller_1",
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{
"author_id": "e mossel_1",
"name": "Elchanan Mossel",
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... | null |
14035257 | 0911.1767 | 2009-11-09 | A Natural Dynamics for Bargaining on Exchange Networks | Bargaining networks model the behavior of a set of players that need to reach pairwise agreements for making profits. Nash bargaining solutions are special outcomes of such games that are both stable and balanced. Kleinberg and Tardos proved a sharp algorithmic characterization of such outcomes, but left open the probl... | [
"cs.GT"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
49242 | 0911.1813 | 2009-11-09 | Interactive Privacy via the Median Mechanism | We define a new interactive differentially private mechanism -- the median mechanism -- for answering arbitrary predicate queries that arrive online. Relative to fixed accuracy and privacy constraints, this mechanism can answer exponentially more queries than the previously best known interactive privacy mechanism (the... | [
"cs.CR",
"cs.CC",
"cs.DB",
"cs.DS"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
2070549 | 0911.1705 | 2009-11-09 | Simulation-based model selection for dynamical systems in systems and population biology | Computer simulations have become an important tool across the biomedical sciences and beyond. For many important problems several different models or hypotheses exist and choosing which one best describes reality or observed data is not straightforward. We therefore require suitable statistical tools that allow us to c... | [
"q-bio.QM",
"stat.CO"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
120148690 | 0911.1612 | 2009-11-09 | Nancay radiotelescope as part of the international Pulsar Timing campaigns | Nancay radiotelescope is involved in high precision timing since 20 years. Since 2004, a coherent dedispersion instrumentation enables numerous routine observations on more than 200 pulsars using half of the time if this 100-meters class radiotelescope. Two main programs are currently conducted. A large set of young an... | [
"astro-ph.CO",
"astro-ph.HE",
"astro-ph.IM"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "i cognard_1",
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{
"author_id": "g theureau_1",
"name": "Gilles Theureau",
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"h_index": null,
"num_papers": nul... | null |
119118986 | 0911.2004 | 2009-11-10 | Physical properties and morphology of a newly identified compact z=4.04 lensed submillimeter galaxy in Abell 2218 | We present the identification of a bright submm source, SMMJ163555.5+661300, detected in the lensing cluster Abell2218, for which we have accurately determined the position using observations from the Submillimeter Array (SMA). The identified optical counterpart has a spectroscopic redshift of z=4.044+-0.001 if we attr... | [
"astro-ph.CO"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
16646306 | 0911.1965 | 2009-11-10 | Active Learning for Mention Detection: A Comparison of Sentence Selection Strategies | We propose and compare various sentence selection strategies for active learning for the task of detecting mentions of entities. The best strategy employs the sum of confidences of two statistical classifiers trained on different views of the data. Our experimental results show that, compared to the random selection st... | [
"cs.CL",
"cs.AI"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "n madnani_1",
"name": "Nitin Madnani",
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"num_citations": null
},
{
"author_id": "h jing_17",
"name": "Hongyan Jing",
"publication_history": null,
"h_index": null,
"num_papers": null,
... | null |
1200853 | 0911.1973 | 2009-11-10 | Limit theorems for Markov processes indexed by continuous time Galton--Watson trees | We study the evolution of a particle system whose genealogy is given by a supercritical continuous time Galton--Watson tree. The particles move independently according to a Markov process and when a branching event occurs, the offspring locations depend on the position of the mother and the number of offspring. We prov... | [
"math.PR"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
6714839 | 0911.1999 | 2009-11-10 | Magnetically Controlled Exchange Process in an Ultracold Atom-Dimer Mixture | We report on the observation of an elementary exchange process in an optically trapped ultracold sample of atoms and Feshbach molecules. We can magnetically control the energetic nature of the process and tune it from endoergic to exoergic, enabling the observation of a pronounced threshold behavior. In contrast to rel... | [
"cond-mat.quant-gas",
"cond-mat.other",
"physics.atom-ph",
"quant-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
115157749 | 0911.1937 | 2009-11-10 | Remez-Type Inequality for Discrete Sets | The classical Remez inequality bounds the maximum of the absolute value of a polynomial $P(x)$ of degree $d$ on $[-1,1]$ through the maximum of its absolute value on any subset $Z$ of positive measure in $[-1,1]$. Similarly, in several variables the maximum of the absolute value of a polynomial $P(x)$ of degree $d$ on ... | [
"math.CA"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
14597065 | 0911.2053 | 2009-11-10 | Interference Mitigation Through Limited Receiver Cooperation | Interference is a major issue limiting the performance in wireless networks. Cooperation among receivers can help mitigate interference by forming distributed MIMO systems. The rate at which receivers cooperate, however, is limited in most scenarios. How much interference can one bit of receiver cooperation mitigate? I... | [
"cs.IT",
"math.IT"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
14547781 | 0911.1849 | 2009-11-10 | The Feasibility of Interference Alignment over Measured MIMO-OFDM Channels | Interference alignment (IA) has been shown to achieve the maximum achievable degrees of freedom in the interference channel. This results in sum rate scaling linearly with the number of users in the high signal-to-noise-ratio (SNR) regime. Linear scaling is achieved by precoding transmitted signals to align interferenc... | [
"cs.IT",
"math.IT"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
10920772 | 0911.1824 | 2009-11-10 | Community Structure in Time-Dependent, Multiscale, and Multiplex Networks | Network science is an interdisciplinary endeavor, with methods and applications drawn from across the natural, social, and information sciences. A prominent problem in network science is the algorithmic detection of tightly-connected groups of nodes known as communities. We developed a generalized framework of network ... | [
"physics.data-an",
"physics.soc-ph"
] | null | [
"target.author.publication_history",
"target.author.publication_history.key_reference",
"target.key_reference"
] | [
{
"corpus_id": "11825672",
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] | [
{
"author_id": "p mucha_1",
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{
"author_id": "t richardson_3",
"name": "Thomas Richardson",
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"h_index": null,
"num_pape... | null |
119217397 | 0911.1955 | 2009-11-10 | The Temperature of the Cosmic Microwave Background | The FIRAS data are independently recalibrated using the WMAP data to obtain a CMB temperature of 2.7260 +/- 0.0013. Measurements of the temperature of the cosmic microwave background are reviewed. The determination from the measurements from the literature is cosmic microwave background temperature of 2.72548 +/- 0.000... | [
"astro-ph.CO"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
27177002 | 0911.2060 | 2009-11-11 | Correlation-induced conductance suppression at level degeneracy in a quantum dot | The large, level-dependent g-factors in an InSb nanowire quantum dot allow for the occurrence of a variety of level crossings in the dot. While we observe the standard conductance enhancement in the Coulomb blockade region for aligned levels with different spins due to the Kondo effect, a vanishing of the conductance i... | [
"cond-mat.mes-hall"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
88518444 | 0911.2093 | 2009-11-11 | Statistical applications of the multivariate skew-normal distribution | Azzalini & Dalla Valle (1996) have recently discussed the multivariate skew-normal distribution which extends the class of normal distributions by the addition of a shape parameter. The first part of the present paper examines further probabilistic properties of the distribution, with special emphasis on aspects of sta... | [
"stat.ME"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
54599136 | 0911.2076 | 2009-11-11 | The basic paradoxes of statistical classical physics and the quantum mechanics | Statistical classical mechanics and quantum mechanics are developed and well-known theories that represent a basis for modern physics. The two described theories are well known and have been well studied. As these theories contain numerous paradoxes, many scientists doubt their internal consistencies. However, these pa... | [
"physics.gen-ph",
"quant-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
4411280 | 0911.2237 | 2009-11-11 | At the heart of the matter: the origin of bulgeless dwarf galaxies and Dark Matter cores | For almost two decades the properties of "dwarf" galaxies have challenged the Cold Dark Matter (CDM) paradigm of galaxy formation. Most observed dwarf galaxies consists of a rotating stellar disc embedded in a massive DM halo with a near constant-density core. Yet, models based on the CDM scenario invariably form galax... | [
"astro-ph.CO",
"astro-ph.GA",
"hep-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
17646717 | 0911.2293 | 2009-11-11 | A Robust Control Framework for Malware Filtering | We study and develop a robust control framework for malware filtering and network security. We investigate the malware filtering problem by capturing the tradeoff between increased security on one hand and continued usability of the network on the other. We analyze the problem using a linear control system model with a... | [
"cs.CR"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "m bloem_1",
"name": "Michael Bloem",
"publication_history": null,
"h_index": null,
"num_papers": null,
"num_citations": null
},
{
"author_id": "t alpcan_1",
"name": "Tansu Alpcan",
"publication_history": null,
"h_index": null,
"num_papers": null,
"... | null |
55033004 | 0911.2165 | 2009-11-11 | Methods for measuring pedestrian density, flow, speed and direction with minimal scatter | The progress of image processing during recent years allows the measurement of pedestrian characteristics on a "microscopic" scale with low costs. However, density and flow are concepts of fluid mechanics defined for the limit of infinitely many particles. Standard methods of measuring these quantities locally (e.g. co... | [
"physics.soc-ph",
"physics.data-an"
] | null | [
"target.author.publication_history",
"target.author.publication_history.key_reference"
] | [] | [
{
"author_id": "b steffen_1",
"name": "Bernhard Steffen",
"publication_history": null,
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"num_papers": null,
"num_citations": null
},
{
"author_id": "a seyfried_1",
"name": "Armin Seyfried",
"publication_history": null,
"h_index": null,
"num_papers": nu... | null |
115181697 | 0911.2077 | 2009-11-11 | Central Binomial Tail Bounds | An alternate form for the binomial tail is presented, which leads to a variety of bounds for the central tail. A few can be weakened into the corresponding Chernoff and Slud bounds, which not only demonstrates the quality of the presented bounds, but also provides alternate proofs for the classical bounds. | [
"math.PR"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "m telgarsky_1",
"name": "Matus Telgarsky",
"publication_history": null,
"h_index": null,
"num_papers": null,
"num_citations": null
}
] | null |
118485041 | 0911.2096 | 2009-11-11 | Mapping all classical spin models to a lattice gauge theory | In our recent work [Phys. Rev. Lett. 102, 230502 (2009)] we showed that the partition function of all classical spin models, including all discrete standard statistical models and all Abelian discrete lattice gauge theories (LGTs), can be expressed as a special instance of the partition function of a 4-dimensional pure... | [
"quant-ph",
"cond-mat.stat-mech",
"hep-lat"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "g cuevas_1",
"name": "Gemma [\"De\",\"las\"] Cuevas",
"publication_history": null,
"h_index": null,
"num_papers": null,
"num_citations": null
},
{
"author_id": "w dür_1",
"name": "Wolfgang Dür",
"publication_history": null,
"h_index": null,
"num_papers... | null |
119228768 | 0911.2444 | 2009-11-12 | Sunyaev-Zel'dovich Cluster Profiles Measured with the South Pole Telescope | We present Sunyaev-Zel'dovich measurements of 15 massive X-ray selected galaxy clusters obtained with the South Pole Telescope. The Sunyaev-Zel'dovich (SZ) cluster signals are measured at 150 GHz, and concurrent 220 GHz data are used to reduce astrophysical contamination. Radial profiles are computed using a technique ... | [
"astro-ph.CO"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
56434271 | 0911.2454 | 2009-11-12 | Simultaneous measurement of cosmology and intrinsic alignments using joint cosmic shear and galaxy number density correlations | Cosmic shear is a powerful method to constrain cosmology, provided that any systematic effects are under control. The intrinsic alignment of galaxies is expected to severely bias parameter estimates if not taken into account. We explore the potential of a joint analysis of tomographic galaxy ellipticity, galaxy number ... | [
"astro-ph.CO"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
15289539 | 0911.2346 | 2009-11-12 | Asymmetric Multilevel Diversity Coding and Asymmetric Gaussian Multiple Descriptions | We consider the asymmetric multilevel diversity (A-MLD) coding problem, where a set of $2^K-1$ information sources, ordered in a decreasing level of importance, is encoded into $K$ messages (or descriptions). There are $2^K-1$ decoders, each of which has access to a non-empty subset of the encoded messages. Each decode... | [
"cs.IT",
"math.IT"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "s mohajer_1",
"name": "Soheil Mohajer",
"publication_history": null,
"h_index": null,
"num_papers": null,
"num_citations": null
},
{
"author_id": "c tian_27",
"name": "Chao Tian",
"publication_history": null,
"h_index": null,
"num_papers": null,
"n... | null |
88518349 | 0911.2375 | 2009-11-12 | High dimensional sparse covariance estimation via directed acyclic graphs | We present a graph-based technique for estimating sparse covariance matrices and their inverses from high-dimensional data. The method is based on learning a directed acyclic graph (DAG) and estimating parameters of a multivariate Gaussian distribution based on a DAG. For inferring the underlying DAG we use the PC-algo... | [
"stat.ME"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
56300803 | 0911.2308 | 2009-11-12 | Uncovering the community structure associated with the diffusion dynamics of networks | As two main focuses of the study of complex networks, the community structure and the dynamics on networks have both attracted much attention in various scientific fields. However, it is still an open question how the community structure is associated with the dynamics on complex networks. In this paper, through invest... | [
"physics.soc-ph"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "x cheng_3",
"name": "Xueqi Cheng",
"publication_history": null,
"h_index": null,
"num_papers": null,
"num_citations": null
},
{
"author_id": "h shen_38",
"name": "Huawei Shen",
"publication_history": null,
"h_index": null,
"num_papers": null,
"num_... | null |
53460505 | 0911.2498 | 2009-11-12 | Bayesian non-linear large scale structure inference of the Sloan Digital Sky Survey data release 7 | In this work we present the first non-linear, non-Gaussian full Bayesian large scale structure analysis of the cosmic density field conducted so far. The density inference is based on the Sloan Digital Sky Survey data release 7, which covers the northern galactic cap. We employ a novel Bayesian sampling algorithm, whic... | [
"astro-ph.CO",
"astro-ph.IM"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
55398575 | 0911.2419 | 2009-11-12 | Scaled solar tracks and isochrones in a large region of the Z-Y plane. II. From 2.5 to 20 solar masses | We extend our theoretical computations for low-mass stars to intermediate-mass and massive stars, for which few databases exist in the literature. Evolutionary tracks and isochrones are computed from 2.50 to 20 solar masses for agrid of 37 chemical compositions with metal content Z between 0.0001 and 0.070 and helium c... | [
"astro-ph.SR"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
51444714 | 0911.2412 | 2009-11-12 | Fermi Large Area Telescope Observations of the Crab Pulsar and Nebula | We report on gamma-ray observations of the Crab Pulsar and Nebula using 8 months of survey data with the Fermi Large Area Telescope (LAT). The high quality light curve obtained using the ephemeris provided by the Nancay and Jodrell Bank radio telescopes shows two main peaks stable in phase with energy. The first gamma-... | [
"astro-ph.HE"
] | null | [
"target.author.publication_history",
"target.author.publication_history.key_reference"
] | [
{
"corpus_id": "16213745",
"num_citations": null
},
{
"corpus_id": "28438927",
"num_citations": null
},
{
"corpus_id": "51484920",
"num_citations": null
},
{
"corpus_id": "5387958",
"num_citations": null
},
{
"corpus_id": "6239566",
"num_citations": null
}
] | [
{
"author_id": "a abdo_2",
"name": "A. [\"A.\"] Abdo",
"publication_history": null,
"h_index": null,
"num_papers": null,
"num_citations": null
},
{
"author_id": "m ackermann_1",
"name": "Markus Ackermann",
"publication_history": null,
"h_index": null,
"num_papers": nu... | null |
53407987 | 0911.2496 | 2009-11-12 | Fast Hamiltonian sampling for large scale structure inference | In this work we present a new and efficient Bayesian method for nonlinear three dimensional large scale structure inference. We employ a Hamiltonian Monte Carlo (HMC) sampler to obtain samples from a multivariate highly non-Gaussian lognormal Poissonian density posterior given a set of observations. The HMC allows us t... | [
"astro-ph.CO",
"astro-ph.IM"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
119188193 | 0911.2353 | 2009-11-12 | Recursive representation of the torus 1-point conformal block | The recursive relation for the 1-point conformal block on a torus is derived and used to prove the identities between conformal blocks recently conjectured by R. Poghossian. As an illustration of the efficiency of the recurrence method the modular invariance of the 1-point Liouville correlation function is numerically ... | [
"hep-th"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
7919938 | 0911.2342 | 2009-11-12 | Distributions generated by perturbation of symmetry with emphasis on a multivariate skew $t$ distribution | A fairly general procedure is studied to perturbate a multivariate density satisfying a weak form of multivariate symmetry, and to generate a whole set of non-symmetric densities. The approach is general enough to encompass a number of recent proposals in the literature, variously related to the skew normal distributio... | [
"stat.ME"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
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