corpus_id stringlengths 3 9 | arxiv_id stringlengths 9 16 | date stringdate 1989-10-26 00:00:00 2024-09-30 00:00:00 | title stringlengths 4 240 | abstract stringlengths 3 3.15k | categories listlengths 1 10 | topics listlengths 0 15 ⌀ | roles listlengths 1 4 | key_references listlengths 0 10 ⌀ | authors listlengths 1 5.28k ⌀ | citation_trajectory listlengths 14 26 ⌀ |
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119287374 | 0903.2139 | 2009-03-12 | High-precision photometry by telescope defocussing. I. The transiting planetary system WASP-5 | We present high-precision photometry of two transit events of the extrasolar planetary system WASP-5, obtained with the Danish 1.54m telescope at ESO La Silla. In order to minimise both random and flat-fielding errors, we defocussed the telescope so its point spread function approximated an annulus of diameter 40 pixel... | [
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33424935 | 0903.2102 | 2009-03-12 | Accuracy thresholds of topological color codes on the hexagonal and square-octagonal lattices | Accuracy thresholds of quantum error correcting codes, which exploit topological properties of systems, defined on two different arrangements of qubits are predicted. We study the topological color codes on the hexagonal lattice and on the square-octagonal lattice by the use of mapping into the spin glass systems. The ... | [
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15059748 | 0903.2086 | 2009-03-12 | GRB 080916C: on the radiation origin of the prompt emission from KeV/MeV to GeV | Fermi observations of high-energy gamma-ray emission from GRB 080916C shows that its spectrum is consistent with the Band function from MeV to tens of GeV. Assuming one single emission mechanism dominates in the whole energy range, we show that this spectrum is consistent with synchrotron origin by shock-accelerated el... | [
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119190597 | 0903.2224 | 2009-03-12 | Black/White hole radiation from dispersive theories | We study the fluxes emitted by black holes when using dispersive field theories. We work with stationary one dimensional backgrounds which are asymptotically flat on both sides of the horizon. The asymptotic fluxes are governed by a 3x3 Bogoliubov transformation. The fluxes emitted by the corresponding white holes are ... | [
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9294538 | 0903.2179 | 2009-03-12 | Non-Local Box Complexity and Secure Function Evaluation | A non-local box is an abstract device into which Alice and Bob input bits x and y respectively and receive outputs a and b respectively, where a, b are uniformly distributed and the parity of a+b equals xy. Such boxes have been central to the study of quantum or generalized non-locality as well as the simulation of non... | [
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3075436 | 0903.2210 | 2009-03-12 | Network inference - with confidence - from multivariate time series | Networks - collections of interacting elements or nodes - abound in the natural and manmade worlds. For many networks, complex spatiotemporal dynamics stem from patterns of physical interactions unknown to us. To infer these interactions, it is common to include edges between those nodes whose time series exhibit suffi... | [
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115165730 | 0903.2178 | 2009-03-12 | Poisson-Hopf limit of quantum algebras | The Poisson-Hopf analogue of an arbitrary quantum algebra U_z(g) is constructed by introducing a one-parameter family of quantizations U_{z,h}(g) depending explicitly on h and by taking the appropriate h -> 0 limit. The q-Poisson analogues of the su(2) algebra are discussed and the novel su_q^P (3) case is introduced. ... | [
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1450886 | 0903.2282 | 2009-03-12 | Multiagent Learning in Large Anonymous Games | In large systems, it is important for agents to learn to act effectively, but sophisticated multi-agent learning algorithms generally do not scale. An alternative approach is to find restricted classes of games where simple, efficient algorithms converge. It is shown that stage learning efficiently converges to Nash eq... | [
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5221750 | 1001.5381 | 2009-03-12 | Composition of the galactic center star cluster | We present a population analysis of the nuclear stellar cluster of the Milky Way based on adaptive optics narrow band spectral energy distributions. We find strong evidence for the lack of a stellar cusp and a similarity of the late type luminosity function to the bulge KLF. | [
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118490054 | 0903.2063 | 2009-03-12 | Mott transition in two-dimensional frustrated compounds | The phase diagrams of isotropic and anisotropic triangular lattices with local Coulomb interactions are evaluated within cluster dynamical mean field theory. As a result of partial geometric frustration in the anisotropic lattice, short range correlations are shown to give rise to reentrant behavior which is absent in ... | [
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6570126 | 0903.2181 | 2009-03-12 | Line Graphs, Link Partitions and Overlapping Communities | In this paper, we use a partition of the links of a network in order to uncover its community structure. This approach allows for communities to overlap at nodes, so that nodes may be in more than one community. We do this by making a node partition of the line graph of the original network. In this way we show that an... | [
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16324808 | 0903.2465 | 2009-03-13 | A search for muon neutrino and antineutrino disappearance in MiniBooNE | The MiniBooNE Collaboration reports a search for \numu and \numubar disappearance in the \dmsq region of a few \evsq. These measurements are important for constraining models with extra types of neutrinos, extra dimensions an d CPT violation. Fits to the shape of the \numu and \numubar energy spectra reveal no evidence... | [
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7696405 | 0903.2323 | 2009-03-13 | Quantitative estimates of the convergence of the empirical covariance matrix in Log-concave Ensembles | Let $K$ be an isotropic convex body in $\R^n$. Given $\eps>0$, how many independent points $X_i$ uniformly distributed on $K$ are needed for the empirical covariance matrix to approximate the identity up to $\eps$ with overwhelming probability? Our paper answers this question posed by Kannan, Lovasz and Simonovits. Mor... | [
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121783458 | 0903.2482 | 2009-03-13 | The Optical Gravitational Lensing Experiment. The OGLE-III Catalog of Variable Stars. III. RR Lyrae Stars in the Large Magellanic Cloud | The third part of the OGLE-III Catalog of Variable Stars comprises 24906 RR Lyr stars in the Large Magellanic Cloud (LMC). This sample consists of 17693 fundamental-mode (RRab), 4958 first-overtone (RRc), 986 double-mode (RRd) and 1269 suspected second-overtone (RRe) pulsators. 66 objects are foreground Galactic RR Lyr... | [
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15527082 | 0903.2515 | 2009-03-13 | Adaptive Lasso for High Dimensional Regression and Gaussian Graphical Modeling | We show that the two-stage adaptive Lasso procedure (Zou, 2006) is consistent for high-dimensional model selection in linear and Gaussian graphical models. Our conditions for consistency cover more general situations than those accomplished in previous work: we prove that restricted eigenvalue conditions (Bickel et al.... | [
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15759975 | 0903.2354 | 2009-03-13 | Planetesimals to Protoplanets II: Effect of Debris on Terrestrial Planet Formation | In this paper we extend our numerical method for simulating terrestrial planet formation from Leinhardt and Richardson (2005) to include dynamical friction from the unresolved debris component. In the previous work we implemented a rubble pile planetesimal collision model into direct N-body simulations of terrestrial p... | [
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17849818 | 0903.2479 | 2009-03-13 | Compact High-Redshift Galaxies Are the Cores of the Most Massive Present-Day Spheroids | Observations suggest that effective radii of high-z massive spheroids are as much as a factor ~6 smaller than low-z galaxies of comparable mass. Given the apparent absence of low-z counterparts, this has often been interpreted as indicating that the high density, compact red galaxies must be 'puffed up' by some mechani... | [
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5829793 | 0903.2445 | 2009-03-13 | Qualitative Logics and Equivalences for Probabilistic Systems | We investigate logics and equivalence relations that capture the qualitative behavior of Markov Decision Processes (MDPs). We present Qualitative Randomized CTL (QRCTL): formulas of this logic can express the fact that certain temporal properties hold over all paths, or with probability 0 or 1, but they do not distingu... | [
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6075029 | 0903.2448 | 2009-03-13 | Positive Logic with Adjoint Modalities: Proof Theory, Semantics and Reasoning about Information | We consider a simple modal logic whose non-modal part has conjunction and disjunction as connectives and whose modalities come in adjoint pairs, but are not in general closure operators. Despite absence of negation and implication, and of axioms corresponding to the characteristic axioms of (e.g.) T, S4 and S5, such lo... | [
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264777379 | 0903.2525 | 2009-03-13 | CloudSim: A Novel Framework for Modeling and Simulation of Cloud Computing Infrastructures and Services | Cloud computing focuses on delivery of reliable, secure, fault-tolerant, sustainable, and scalable infrastructures for hosting Internet-based application services. These applications have different composition, configuration, and deployment requirements. Quantifying the performance of scheduling and allocation policy o... | [
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13306380 | 1304.4020 | 2009-03-13 | Supplementary material for: Adaptive Observers and Parameter Estimation for a Class of Systems Nonlinear in the Parameters | This supplement illustrates application of adaptive observer design from (Tyukin et al, 2013) for systems which are not uniquely identifiable. It also provides an example of adaptive observer design for a magnetic bearings benchmark system (Lin, Knospe, 2000). | [
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18701477 | 0903.2574 | 2009-03-14 | A Quantitative Arrow Theorem | Arrow's Impossibility Theorem states that any constitution which satisfies Independence of Irrelevant Alternatives (IIA) and Unanimity and is not a Dictator has to be non-transitive. In this paper we study quantitative versions of Arrow theorem. Consider $n$ voters who vote independently at random, each following the u... | [
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14198030 | 0903.2532 | 2009-03-14 | Parameters and pitfalls in dark energy models with time varying equation of state | Are geometrical summaries of the CMB and LSS sufficient for estimating cosmological parameters? And how does our choice of a dark energy model impact the current constraints on standard cosmological parameters? We address these questions in the context of the widely used CPL parametrization of a time varying equation o... | [
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5548285 | 0903.2653 | 2009-03-15 | Capacity region of the deterministic multi-pair bi-directional relay network | In this paper we study the capacity region of the multi-pair bidirectional (or two-way) wireless relay network, in which a relay node facilitates the communication between multiple pairs of users. This network is a generalization of the well known bidirectional relay channel, where we have only one pair of users. We ex... | [
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14107283 | 0903.2641 | 2009-03-15 | Multiscale Computations on Neural Networks: From the Individual Neuron Interactions to the Macroscopic-Level Analysis | We show how the Equation-Free approach for multi-scale computations can be exploited to systematically study the dynamics of neural interactions on a random regular connected graph under a pairwise representation perspective. Using an individual-based microscopic simulator as a black box coarse-grained timestepper and ... | [
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8896728 | 0903.2682 | 2009-03-15 | Privacy in Location Based Services: Primitives Toward the Solution | Location based services (LBS) are one of the most promising and innovative directions of convergence technologies resulting of emergence of several fields including database systems, mobile communication, Internet technology, and positioning systems. Although being initiated as early as middle of 1990's, it is only rec... | [
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35594167 | 0903.2646 | 2009-03-15 | Equation-Free Multiscale Computations in Social Networks: from Agent-based Modelling to Coarse-grained Stability and Bifurcation Analysis | We focus at the interface between multiscale computations, bifurcation theory and social networks. In particular we address how the Equation-Free approach, a recently developed computational framework, can be exploited to systematically extract coarse-grained, emergent dynamical information by bridging detailed, agent-... | [
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16096886 | 0903.2634 | 2009-03-15 | A Polynomial Number of Random Points does not Determine the Volume of a Convex Body | We show that there is no algorithm which, provided a polynomial number of random points uniformly distributed over a convex body in R^n, can approximate the volume of the body up to a constant factor with high probability. | [
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696803 | 0903.2890 | 2009-03-16 | Kalman Filtering with Intermittent Observations: Weak Convergence to a Stationary Distribution | The paper studies the asymptotic behavior of Random Algebraic Riccati Equations (RARE) arising in Kalman filtering when the arrival of the observations is described by a Bernoulli i.i.d. process. We model the RARE as an order-preserving, strongly sublinear random dynamical system (RDS). Under a sufficient condition, st... | [
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341343 | 0903.2851 | 2009-03-16 | A parameter-free hedging algorithm | We study the problem of decision-theoretic online learning (DTOL). Motivated by practical applications, we focus on DTOL when the number of actions is very large. Previous algorithms for learning in this framework have a tunable learning rate parameter, and a barrier to using online-learning in practical applications i... | [
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5666416 | 0903.2755 | 2009-03-16 | Analytical galactic models with mild stellar cusps | In the past two decades, it has been established by high-resolution observations of early-type galaxies that their nuclear surface brightness and corresponding stellar mass densities are characterized by cusps. In this paper, we present a new spherical analytical model family describing mild cuspy centres. We study iso... | [
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5739648 | 0903.2774 | 2009-03-16 | Compressive estimation of doubly selective channels in multicarrier systems: Leakage effects and sparsity-enhancing processing | We consider the application of compressed sensing (CS) to the estimation of doubly selective channels within pulse-shaping multicarrier systems (which include OFDM systems as a special case). By exploiting sparsity in the delay-Doppler domain, CS-based channel estimation allows for an increase in spectral efficiency th... | [
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16964326 | 0903.2569 | 2009-03-16 | Equivalent Dynamics from Disparate Synaptic Weights in a Prevalent Visual Circuit | Neural feedback-triads consisting of two feedback loops with a non-reciprocal lateral connection from one loop to the other are ubiquitous in the brain. We show analytically that the dynamics of this network topology are determined by two algebraic combinations of its five synaptic weights. Thus different weight settin... | [
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"name": "Sebastian [\"F.\"] Brandt",
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8825598 | 0903.2862 | 2009-03-16 | Tracking using explanation-based modeling | We study the tracking problem, namely, estimating the hidden state of an object over time, from unreliable and noisy measurements. The standard framework for the tracking problem is the generative framework, which is the basis of solutions such as the Bayesian algorithm and its approximation, the particle filters. Howe... | [
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470113 | 0903.2825 | 2009-03-16 | On the Computational Complexity of Satisfiability Solving for String Theories | Satisfiability solvers are increasingly playing a key role in software verification, with particularly effective use in the analysis of security vulnerabilities. String processing is a key part of many software applications, such as browsers and web servers. These applications are susceptible to attacks through malicio... | [
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56035502 | 0903.2686 | 2009-03-16 | Spin Waves and Magnetic Exchange Interactions in CaFe2As2 | Antiferromagnetism is relevant to high temperature (high-Tc) superconductivity because copper oxide and iron arsenide high-Tc superconductors arise from electron- or hole-doping of their antiferromagnetic (AF) ordered parent compounds. There are two broad classes of explanation for the phenomenon of antiferromagnetism:... | [
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4491235 | 0903.2981 | 2009-03-17 | Energy Spectra of the Soft X-ray Diffuse Emission in Fourteen Fields Observed with Suzaku | The soft diffuse X-ray emission of twelve fields observed with Suzaku are presented together with two additional fields from previous analyses. All have galactic longitudes 65 deg < l < 295 deg to avoid contributions from the very bright diffuse source that extends at least 30 deg from the Galactic center. The surface ... | [
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119236386 | 0903.2973 | 2009-03-17 | The detection of neutrino interactions in the emulsion/lead target of the OPERA experiment | The OPERA neutrino detector in the underground Gran Sasso Laboratory (LNGS) was designed to perform the first detection of neutrino oscillations in appearance mode through the study of $\nu_\mu\to\nu_\tau$ oscillations. The apparatus consists of an emulsion/lead target complemented by electronic detectors and it is pla... | [
"hep-ex"
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18845125 | 0903.2887 | 2009-03-17 | Random walks on the Apollonian network with a single trap | Explicit determination of the mean first-passage time (MFPT) for trapping problem on complex media is a theoretical challenge. In this paper, we study random walks on the Apollonian network with a trap fixed at a given hub node (i.e. node with the highest degree), which are simultaneously scale-free and small-world. We... | [
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119199168 | 0903.3010 | 2009-03-17 | Modeling Worldwide Highway Networks | This letter addresses the problem of modeling the highway systems of different countries by using complex networks formalism. More specifically, we compare two traditional geographical models with a modified geometrical network model where paths, rather than edges, are incorporated at each step between the origin and d... | [
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2000254 | 0903.3060 | 2009-03-17 | Joint Bayesian endmember extraction and linear unmixing for hyperspectral imagery | This paper studies a fully Bayesian algorithm for endmember extraction and abundance estimation for hyperspectral imagery. Each pixel of the hyperspectral image is decomposed as a linear combination of pure endmember spectra following the linear mixing model. The estimation of the unknown endmember spectra is conducted... | [
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14097776 | 0903.3024 | 2009-03-17 | A Vector Generalization of Costa's Entropy-Power Inequality with Applications | This paper considers an entropy-power inequality (EPI) of Costa and presents a natural vector generalization with a real positive semidefinite matrix parameter. This new inequality is proved using a perturbation approach via a fundamental relationship between the derivative of mutual information and the minimum mean-sq... | [
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119118832 | 0903.2986 | 2009-03-17 | Limits on the WIMP-nucleon scattering cross-section from neutrino telescopes | Neutrino-telescopes like Super-Kamiokande and IceCube have started to explore the neutrino fluxes from WIMP annihilations in the Sun. The non-observation of a signal can put constraints on the WIMP properties. We here focus on the neutrino signal from WIMP annihilation in the Sun and show that under reasonable assumpti... | [
"astro-ph.CO"
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18236731 | 0903.2888 | 2009-03-17 | Recursive solutions for Laplacian spectra and eigenvectors of a class of growing treelike networks | The complete knowledge of Laplacian eigenvalues and eigenvectors of complex networks plays an outstanding role in understanding various dynamical processes running on them; however, determining analytically Laplacian eigenvalues and eigenvectors is a theoretical challenge. In this paper, we study the Laplacian spectra ... | [
"cond-mat.stat-mech"
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18063655 | 0903.2919 | 2009-03-17 | Adaptive estimation for Hawkes processes; application to genome analysis | The aim of this paper is to provide a new method for the detection of either favored or avoided distances between genomic events along DNA sequences. These events are modeled by a Hawkes process. The biological problem is actually complex enough to need a nonasymptotic penalized model selection approach. We provide a t... | [
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788376 | 0903.2966 | 2009-03-17 | Introducing Hierarchy in Energy Games | In this work we introduce hierarchy in wireless networks that can be modeled by a decentralized multiple access channel and for which energy-efficiency is the main performance index. In these networks users are free to choose their power control strategy to selfishly maximize their energy-efficiency. Specifically, we i... | [
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1693226 | 0903.2882 | 2009-03-17 | Intermittency in the photosphere and corona above an active region | Recent studies undoubtedly demonstrate that the magnetic field in the photosphere and corona is an intermittent structure, which offers new views on the underlying physics. In particular, such problems as the existence in the corona of localized areas with extremely strong resistivity (required to explain magnetic reco... | [
"astro-ph.SR",
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1079440 | 0903.2954 | 2009-03-17 | Event-chain Monte Carlo algorithms for hard-sphere systems | In this paper we present the event-chain algorithms, which are fast Markov-chain Monte Carlo methods for hard spheres and related systems. In a single move of these rejection-free methods, an arbitrarily long chain of particles is displaced, and long-range coherent motion can be induced. Numerical simulations show that... | [
"cond-mat.stat-mech"
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15090541 | 0903.2906 | 2009-03-17 | Exact thresholds for Ising-Gibbs samplers on general graphs | We establish tight results for rapid mixing of Gibbs samplers for the Ferromagnetic Ising model on general graphs. We show that if \[(d-1)\tanh\beta<1,\] then there exists a constant C such that the discrete time mixing time of Gibbs samplers for the ferromagnetic Ising model on any graph of n vertices and maximal degr... | [
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118592 | 0903.3002 | 2009-03-17 | Learning with Structured Sparsity | This paper investigates a new learning formulation called structured sparsity, which is a natural extension of the standard sparsity concept in statistical learning and compressive sensing. By allowing arbitrary structures on the feature set, this concept generalizes the group sparsity idea that has become popular in r... | [
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14682034 | 0903.3014 | 2009-03-17 | CDF and Survival Function Estimation with Infinite-Order Kernels | A reduced-bias nonparametric estimator of the cumulative distribution function (CDF) and the survival function is proposed using infinite-order kernels. Fourier transform theory on generalized functions is utilized to obtain the improved bias estimates. The new estimators are analyzed in terms of their relative deficie... | [
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12582597 | 0903.3096 | 2009-03-17 | The Secrecy Capacity Region of the Gaussian MIMO Multi-receiver Wiretap Channel | In this paper, we consider the Gaussian multiple-input multiple-output (MIMO) multi-receiver wiretap channel in which a transmitter wants to have confidential communication with an arbitrary number of users in the presence of an external eavesdropper. We derive the secrecy capacity region of this channel for the most g... | [
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18304232 | 0903.3230 | 2009-03-18 | Clustering of Low-Redshift (z <= 2.2) Quasars from the Sloan Digital Sky Survey | We present measurements of the quasar two-point correlation function, \xi_{Q}, over the redshift range z=0.3-2.2 based upon data from the SDSS. Using a homogeneous sample of 30,239 quasars with spectroscopic redshifts from the DR5 Quasar Catalogue, our study represents the largest sample used for this type of investiga... | [
"astro-ph.CO"
] | null | [
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936687 | 0903.3228 | 2009-03-18 | The Smithsonian/NASA Astrophysics Data System (ADS) Decennial Report | Eight years after the ADS first appeared the last decadal survey wrote: "NASA's initiative for the Astrophysics Data System has vastly increased the accessibility of the scientific literature for astronomers. NASA deserves credit for this valuable initiative and is urged to continue it." Here we summarize some of the c... | [
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118527460 | 0903.3070 | 2009-03-18 | Dark Stars: a new look at the First Stars in the Universe | We have proposed that the first phase of stellar evolution in the history of the Universe may be Dark Stars (DS), powered by dark matter heating rather than by nuclear fusion, and in this paper we examine the history of these DS. The power source is annihilation of Weakly Interacting Massive Particles (WIMPs) which are... | [
"astro-ph.CO"
] | null | [
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115168878 | 0903.3179 | 2009-03-18 | Entropy of Random Walk Range | We study the entropy of the set traced by an $n$-step random walk on $\Z^d$. We show that for $d \geq 3$, the entropy is of order $n$. For $d = 2$, the entropy is of order $n/\log^2 n$. These values are essentially governed by the size of the boundary of the trace. | [
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11588265 | 0903.3103 | 2009-03-18 | Efficiently Learning a Detection Cascade with Sparse Eigenvectors | In this work, we first show that feature selection methods other than boosting can also be used for training an efficient object detector. In particular, we introduce Greedy Sparse Linear Discriminant Analysis (GSLDA) \cite{Moghaddam2007Fast} for its conceptual simplicity and computational efficiency; and slightly bett... | [
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18322499 | 0903.3081 | 2009-03-18 | On normal approximations to $U$-statistics | Let ${X_1,...,X_n}$ be i.i.d. random observations. Let $\mathbb{S}=\mathbb{L}+\mathbb{T}$ be a $U$-statistic of order $k\ge2$ where $\mathbb{L}$ is a linear statistic having asymptotic normal distribution, and $\mathbb{T}$ is a stochastically smaller statistic. We show that the rate of convergence to normality for $\ma... | [
"math.PR"
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15553875 | 0903.3257 | 2009-03-18 | A New Local Distance-Based Outlier Detection Approach for Scattered Real-World Data | Detecting outliers which are grossly different from or inconsistent with the remaining dataset is a major challenge in real-world KDD applications. Existing outlier detection methods are ineffective on scattered real-world datasets due to implicit data patterns and parameter setting issues. We define a novel "Local Dis... | [
"cs.LG",
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] | null | null | null |
14976113 | 0903.3222 | 2009-03-18 | 3D Seiberg-like Dualities and M2 Branes | We investigate features of duality in three dimensional N=2 Chern-Simons matter theories conjectured to describe M2 branes at toric Calabi Yau four-fold singularities. For 3D theories with non-chiral 4D parents we propone a Seiberg-like duality which turns out to be a toric duality. For theories with chiral 4D parents ... | [
"hep-th"
] | null | [
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7312607 | 0903.3217 | 2009-03-18 | Limits of Declustering Methods for Disentangling Exogenous from Endogenous Events in Time Series with Foreshocks, Main shocks and Aftershocks | Many time series in natural and social sciences can be seen as resulting from an interplay between exogenous influences and an endogenous organization. We use a simple (ETAS) model of events occurring sequentially, in which future events are influenced (partially triggered) by past events to ask the question of how wel... | [
"physics.data-an",
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] | null | [
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13742857 | 0903.3127 | 2009-03-18 | Norm-Product Belief Propagation: Primal-Dual Message-Passing for Approximate Inference | In this paper we treat both forms of probabilistic inference, estimating marginal probabilities of the joint distribution and finding the most probable assignment, through a unified message-passing algorithm architecture. We generalize the Belief Propagation (BP) algorithms of sum-product and max-product and tree-rewai... | [
"cs.AI",
"cs.IT",
"math.IT"
] | null | [
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109721 | 0903.3131 | 2009-03-18 | Matrix Completion With Noise | On the heels of compressed sensing, a remarkable new field has very recently emerged. This field addresses a broad range of problems of significant practical interest, namely, the recovery of a data matrix from what appears to be incomplete, and perhaps even corrupted, information. In its simplest form, the problem is ... | [
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16898174 | 0903.3036 | 2009-03-18 | A Search for Occultations of Bright Stars by Small Kuiper Belt Objects using Megacam on the MMT | We conducted a search for occultations of bright stars by Kuiper Belt Objects (KBOs) to estimate the density of sub-km KBOs in the sky. We report here the first results of this occultation survey of the outer solar system conducted in June 2007 and June/July 2008 at the MMT Observatory using Megacam, the large MMT opti... | [
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4404822 | 0903.3178 | 2009-03-18 | Link communities reveal multiscale complexity in networks | Networks have become a key approach to understanding systems of interacting objects, unifying the study of diverse phenomena including biological organisms and human society. One crucial step when studying the structure and dynamics of networks is to identify communities: groups of related nodes that correspond to func... | [
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5009370 | 0903.3372 | 2009-03-19 | Adding constraints to BSDEs with Jumps: an alternative to multidimensional reflections | This paper is dedicated to the analysis of backward stochastic differential equations (BSDEs) with jumps, subject to an additional global constraint involving all the components of the solution. We study the existence and uniqueness of a minimal solution for these so-called constrained BSDEs with jumps via a penalizati... | [
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... | null |
14207213 | 0903.3362 | 2009-03-19 | Maximally Stable Gaussian Partitions with Discrete Applications | Gaussian noise stability results have recently played an important role in proving results in hardness of approximation in computer science and in the study of voting schemes in social choice. We prove a new Gaussian noise stability result generalizing an isoperimetric result by Borell on the heat kernel and derive as ... | [
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18908141 | 0903.3415 | 2009-03-19 | Galaxy Zoo: A sample of blue early-type galaxies at low redshift | We report the discovery of a population of nearby, blue early-type galaxies with high star formation rates (0.5 < SFR < 50 Msun/yr). They are identified by their visual morphology as provided by Galaxy Zoo for SDSS DR6 and their u-r colour. We select a volume-limited sample in the redshift range 0.02 < z < 0.05, corres... | [
"astro-ph.CO"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
2902041 | 0903.3385 | 2009-03-19 | Limit on the diffuse flux of ultra-high energy tau neutrinos with the surface detector of the Pierre Auger Observatory | Data collected at the Pierre Auger Observatory are used to establish an upper limit on the diffuse flux of tau neutrinos in the cosmic radiation. Earth-skimming $\nu_{\tau}$ may interact in the Earth's crust and produce a $\tau$ lepton by means of charged-current interactions. The $\tau$ lepton may emerge from the Eart... | [
"astro-ph.HE"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
19137909 | 0903.3345 | 2009-03-19 | Time-resolved measurement of Landau-Zener tunneling in periodic potentials | We report time-resolved measurements of Landau-Zener tunneling of Bose-Einstein condensates in accelerated optical lattices, clearly resolving the step-like time dependence of the band populations. Using different experimental protocols we were able to measure the tunneling probability both in the adiabatic and in the ... | [
"cond-mat.other",
"quant-ph"
] | null | [
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] | null | null | null |
9808406 | 0903.3437 | 2009-03-19 | Anisotropic Metamaterials Emulated by Tapered Waveguides: Application to Optical Cloaking | We demonstrate that metamaterial devices requiring anisotropic dielectric permittivity and magnetic permeability may be emulated by specially designed tapered waveguides. This approach leads to low-loss, broadband performance. Based on this technique, we demonstrate broadband electromagnetic cloaking in the visible fre... | [
"physics.optics"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "i smolyaninov_1",
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},
{
"author_id": "v smolyaninova_1",
"name": "Vera [\"N.\"] Smolyaninova",
"publication_history": null,
"h_index... | null |
12634910 | 0903.3376 | 2009-03-19 | Constructing integrable systems of semitoric type | Let M be a connected, symplectic 4-manifold. A semitoric integrable system on M essentially consists of a pair of independent, real-valued, smooth functions J and H on the manifold M, for which J generates a Hamiltonian circle action under which H is invariant. In this paper we give a general method to construct, start... | [
"math.SG",
"math.DS"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
14129082 | 0903.3287 | 2009-03-19 | Hyperbolic Voronoi diagrams made easy | We present a simple framework to compute hyperbolic Voronoi diagrams of finite point sets as affine diagrams. We prove that bisectors in Klein's non-conformal disk model are hyperplanes that can be interpreted as power bisectors of Euclidean balls. Therefore our method simply consists in computing an equivalent clipped... | [
"cs.CG"
] | null | [
"target.author.publication_history",
"target.author.publication_history.key_reference"
] | [
{
"corpus_id": "1327029",
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}
] | [
{
"author_id": "f nielsen_2",
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},
{
"author_id": "r nock_1",
"name": "Richard Nock",
"publication_history": null,
"h_index": null,
"num_papers": null,
"... | null |
16447606 | 0903.3289 | 2009-03-19 | Discrete holomorphic local dynamical systems | This is a survey on local dynamics of holomorphic maps in one and several complex variables, discussing in particular normal forms and the structure of local stable sets in the non-hyperbolic case, and including several proofs and a vast bibliography. It updates and enlarge the previous survey arXiv:math/0310089v1. | [
"math.DS",
"math.CV"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
15917065 | 0903.3260 | 2009-03-19 | Nuclear enhancement factor in calculation of Galactic diffuse gamma-rays: A new estimate with DPMJET-3 | A new calculation of nuclear enhancement factor, used in estimation of Galactic diffuse gamma-ray flux from proton-proton interaction in order to take account of heavy nuclei included in cosmic-rays and interstellar matter, is presented by use of a Monte Carlo simulator, DPMJET-3. A new value of 1.8-2.0 in the energy r... | [
"astro-ph.HE"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
16786491 | 0903.3447 | 2009-03-20 | The Importance of Hands-on Experience with Telescopes for Students | Proper interpretation and understanding of astronomical data requires good knowledge of the data acquisition process. The increase in remote observing, queue observing, and the availability of large archived data products risk insulating astronomers from the telescope, potentially reducing their familiarity with the ob... | [
"astro-ph.IM"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "g privon_1",
"name": "George [\"C.\"] Privon",
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},
{
"author_id": "r beaton_1",
"name": "Rachael [\"L.\"] Beaton",
"publication_history": null,
"h_index": null,
"num... | null |
15094358 | 0903.3503 | 2009-03-20 | Whole-plane self-avoiding walks and radial Schramm-Loewner evolution: a numerical study | We numerically test the correspondence between the scaling limit of self-avoiding walks (SAW) in the plane and Schramm-Loewner evolution (SLE) with k=8/3. We introduce a discrete-time process approximating SLE in the exterior of the unit disc and compare the distribution functions for an internal point in the SAW and a... | [
"cond-mat.stat-mech"
] | null | [
"target.author.publication_history",
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] | [
{
"corpus_id": "14121423",
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}
] | [
{
"author_id": "m gherardi_1",
"name": "Marco Gherardi",
"publication_history": null,
"h_index": null,
"num_papers": null,
"num_citations": null
}
] | null |
17140282 | 0903.3535 | 2009-03-20 | Semi-passivity and synchronization of diffusively coupled neuronal oscillators | We discuss synchronization in networks of neuronal oscillators which are interconnected via diffusive coupling, i.e. linearly coupled via gap junctions. In particular, we present sufficient conditions for synchronization in these networks using the theory of semi-passive and passive systems. We show that the conductanc... | [
"nlin.PS",
"nlin.CD",
"q-bio.NC"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "e steur_1",
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},
{
"author_id": "i tyukin_1",
"name": "Ivan [\"Y.\"] Tyukin",
"publication_history": null,
"h_index": null,
"num_papers": null,
... | null |
15677079 | 0903.3593 | 2009-03-20 | Planetary companion candidates around the K giant stars 42 Dra and HD 139357 | For the past 3 years we have been monitoring 62 K giant stars using precise stellar radial velocity (RV) measurements with the 2m Alfred Jensch telescope of the Th\"uringer Landessternwarte Tautenburg (TLS). To probe the dependence of planet formation on stellar mass by finding planets around intermediate-mass giant st... | [
"astro-ph.EP"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
19008085 | 0903.3628 | 2009-03-20 | Asteroseismology of hot pre-white dwarf stars: the case of the DOV stars PG 2131+066 and PG 1707+427, and the PNNV star NGC 1501 | We present an asteroseismological study on the two high-gravity pulsating PG1159 (GW Vir or DOV) stars, PG 2131+066 and PG 1707+427, and on the pulsating [WCE] star NGC 1501. We compute adiabatic $g$-mode pulsation periods on PG1159 evolutionary models with stellar masses ranging from 0.530 to 0.741 Msun. These models ... | [
"astro-ph.SR"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
6653319 | 0903.3537 | 2009-03-20 | Optimization and Analysis of Distributed Averaging with Short Node Memory | In this paper, we demonstrate, both theoretically and by numerical examples, that adding a local prediction component to the update rule can significantly improve the convergence rate of distributed averaging algorithms. We focus on the case where the local predictor is a linear combination of the node's two previous v... | [
"cs.DC",
"cs.IT",
"cs.MA",
"math.IT"
] | null | [
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"target.author.publication_history.key_reference"
] | [] | [
{
"author_id": "b oreshkin_1",
"name": "Boris [\"N.\"] Oreshkin",
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},
{
"author_id": "m coates_1",
"name": "Mark [\"J.\"] Coates",
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"h_index": null,
"num... | null |
2808725 | 0903.3562 | 2009-03-20 | Visual Conceptualizations and Models of Science | This Journal of Informetrics special issue aims to improve our understanding of the structure and dynamics of science by reviewing and advancing existing conceptualizations and models of scholarly activity. Several of these conceptualizations and models have visual manifestations supporting the combination and comparis... | [
"cs.DL",
"physics.soc-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
260763092 | 0903.3480 | 2009-03-20 | Worst case attacks against binary probabilistic traitor tracing codes | An insightful view into the design of traitor tracing codes should necessarily consider the worst case attacks that the colluders can lead. This paper takes an information-theoretic point of view where the worst case attack is defined as the collusion strategy minimizing the achievable rate of the traitor tracing code.... | [
"cs.IT",
"cs.CR",
"math.IT"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "t furon_1",
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{
"author_id": "l pérez-freire_0",
"name": "Luis Pérez-Freire",
"publication_history": null,
"h_index": null,
"num_papers": nu... | null |
16659981 | 0903.3695 | 2009-03-21 | E/S0 Galaxies on the Blue Color-Stellar Mass Sequence at z=0: Fading Mergers or Future Spirals? | We identify a population of morphologically defined E/S0 galaxies lying on the blue sequence at the present epoch. Using three samples, we analyze blue-sequence E/S0s with stellar masses >10^8 Msun, arguing that individual objects may be evolving either up toward the red sequence or down into the blue sequence. Blue-se... | [
"astro-ph.CO"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
16410094 | 0903.3657 | 2009-03-21 | Behavioural and Dynamical Scenarios for Contingent Claims Valuation in Incomplete Markets | We study the problem of determination of asset prices in an incomplete market proposing three different but related scenarios. One scenario uses a market game approach whereas the other two are based on risk sharing or regret minimizing considerations. Dynamical schemes modeling the convergence of the buyer's and of th... | [
"q-fin.PR",
"q-fin.GN"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "l boukas_0",
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{
"author_id": "d pinheiro_1",
"name": "Diogo Pinheiro",
"publication_history": null,
"h_index": null,
"num_papers": n... | null |
11238069 | 0903.3642 | 2009-03-21 | Gossip Coverage Control for Robotic Networks: Dynamical Systems on the Space of Partitions | Future applications in environmental monitoring, delivery of services and transportation of goods motivate the study of deployment and partitioning tasks for groups of autonomous mobile agents. These tasks are achieved by recent coverage algorithms, based upon the classic methods by Lloyd. These algorithms however rely... | [
"math.OC"
] | null | [
"target.author.publication_history",
"target.author.publication_history.key_reference"
] | [] | [
{
"author_id": "f bullo_1",
"name": "Francesco Bullo",
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{
"author_id": "r carli_1",
"name": "Ruggero Carli",
"publication_history": null,
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"num_papers": null,
... | null |
6060037 | 0903.3786 | 2009-03-22 | Multiple-Input Multiple-Output Gaussian Broadcast Channels with Confidential Messages | This paper considers the problem of secret communication over a two-receiver multiple-input multiple-output (MIMO) Gaussian broadcast channel. The transmitter has two independent messages, each of which is intended for one of the receivers but needs to be kept asymptotically perfectly secret from the other. It is shown... | [
"cs.IT",
"cs.CR",
"math.IT"
] | null | [
"target.author.publication_history",
"target.author.publication_history.key_reference"
] | [
{
"corpus_id": "6444597",
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}
] | [
{
"author_id": "r liu_34",
"name": "Ruoheng Liu",
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},
{
"author_id": "t liu_104",
"name": "Tie Liu",
"publication_history": null,
"h_index": null,
"num_papers": null,
"num_citat... | null |
14131202 | 0903.3700 | 2009-03-22 | History of Galaxy Interactions and their Impact on Star Formation over the Last 7 Gyr from GEMS | We perform a comprehensive estimate of the frequency of galaxy mergers and their impact on star formation over z~0.24--0.80 (lookback time T_b~3--7 Gyr) using 3698 (M*>=1e9 Msun) galaxies with GEMS HST, COMBO-17, and Spitzer data. Our results are: (1) Among 790 high mass (M*>=2.5e10 Msun) galaxies, the visually-based m... | [
"astro-ph.CO"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
118380959 | 0903.3630 | 2009-03-23 | Neutrino Coherent Scattering Rates at Direct Dark Matter Detectors | Neutrino-induced recoil events may constitute a background to direct dark matter searches, particularly for those detectors that strive to reach the ton-scale and beyond. This paper discusses the expected neutrino-induced background spectrum due to several of the most important sources, including solar, atmospheric, an... | [
"astro-ph.CO",
"astro-ph.HE",
"hep-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
1348287 | 0903.3850 | 2009-03-23 | Using Structural Recursion for Corecursion | We propose a (limited) solution to the problem of constructing stream values defined by recursive equations that do not respect the guardedness condition. The guardedness condition is imposed on definitions of corecursive functions in Coq, AGDA, and other higher-order proof assistants. In this paper, we concentrate in ... | [
"cs.LO"
] | null | [
"target.author.publication_history"
] | [
{
"corpus_id": "5665142",
"num_citations": null
}
] | [
{
"author_id": "y bertot_1",
"name": "Yves Bertot",
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"h_index": null,
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},
{
"author_id": "e komendantskaya_1",
"name": "Ekaterina Komendantskaya",
"publication_history": null,
"h_index": null,
"num_p... | null |
2192773 | 0903.3887 | 2009-03-23 | Universal features of surname distribution in a subsample of a growing population | We examine the problem of family size statistics (the number of individuals carrying the same surname, or the same DNA sequence) in a given size subsample of an exponentially growing population. We approach the problem from two directions. In the first, we construct the family size distribution for the subsample from t... | [
"q-bio.PE",
"q-bio.GN"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "y maruvka_1",
"name": "Yosef [\"E.\"] Maruvka",
"publication_history": null,
"h_index": null,
"num_papers": null,
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},
{
"author_id": "n shnerb_1",
"name": "Nadav [\"M.\"] Shnerb",
"publication_history": null,
"h_index": null,
"num_... | null |
14268944 | 0903.3964 | 2009-03-23 | The age dependence of the size-stellar mass relation and some implications | We use a sample of about 48,000 SDSS early-type galaxies to show that older galaxies have smaller half-light radii re and larger velocity dispersions sigma than younger ones of the same stellar mass Mstar. We use the age-corrected luminosity Lcorr as a proxy for Mstar to minimize biases: below Lcorr~1e11 Lsun, galaxies... | [
"astro-ph.CO"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
10824970 | 0903.3900 | 2009-03-23 | Optimized Implementation of Elliptic Curve Based Additive Homomorphic Encryption for Wireless Sensor Networks | When deploying wireless sensor networks (WSNs) in public environments it may become necessary to secure their data storage and transmission against possible attacks such as node-compromise and eavesdropping. The nodes feature only small computational and energy resources, thus requiring efficient algorithms. As a solut... | [
"cs.CR",
"cs.PF"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "o ugus_0",
"name": "Osman Ugus",
"publication_history": null,
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},
{
"author_id": "d westhoff_1",
"name": "Dirk Westhoff",
"publication_history": null,
"h_index": null,
"num_papers": null,
"n... | null |
119205444 | 0903.3847 | 2009-03-23 | Scaling Properties of Flexible Membranes from Atomistic Simulations: Application to Graphene | Structure and thermodynamics of crystalline membranes are characterized by the long wavelength behavior of the normal-normal correlation function G(q). We calculate G(q) by Monte Carlo and Molecular Dynamics simulations for a quasi-harmonic model potential and for a realistic potential for graphene. To access the long ... | [
"cond-mat.mtrl-sci",
"cond-mat.soft"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "j los_1",
"name": "Jan [\"H.\"] Los",
"publication_history": null,
"h_index": null,
"num_papers": null,
"num_citations": null
},
{
"author_id": "m katsnelson_1",
"name": "Mikhail [\"I\"] Katsnelson",
"publication_history": null,
"h_index": null,
"num_p... | null |
2573131 | 0903.4217 | 2009-03-24 | Conditional Probability Tree Estimation Analysis and Algorithms | We consider the problem of estimating the conditional probability of a label in time $O(\log n)$, where $n$ is the number of possible labels. We analyze a natural reduction of this problem to a set of binary regression problems organized in a tree structure, proving a regret bound that scales with the depth of the tree... | [
"cs.LG",
"stat.ML"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
7399778 | 0903.4128 | 2009-03-24 | Rate Adaptation via Link-Layer Feedback for Goodput Maximization over a Time-Varying Channel | We consider adapting the transmission rate to maximize the goodput, i.e., the amount of data transmitted without error, over a continuous Markov flat-fading wireless channel. In particular, we consider schemes in which transmitter channel state is inferred from degraded causal error-rate feedback, such as packet-level ... | [
"cs.IT",
"cs.NI",
"math.IT",
"math.OC"
] | null | [
"target.author.publication_history",
"target.author.publication_history.key_reference"
] | [] | [
{
"author_id": "r aggarwal_2",
"name": "Rohit Aggarwal",
"publication_history": null,
"h_index": null,
"num_papers": null,
"num_citations": null
},
{
"author_id": "p schniter_1",
"name": "Philip Schniter",
"publication_history": null,
"h_index": null,
"num_papers": nu... | null |
28214709 | 0903.4009 | 2009-03-24 | Random graphs with clustering | We offer a solution to a long-standing problem in the physics of networks, the creation of a plausible, solvable model of a network that displays clustering or transitivity -- the propensity for two neighbors of a network node also to be neighbors of one another. We show how standard random graph models can be generali... | [
"cond-mat.stat-mech",
"cond-mat.dis-nn",
"physics.soc-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
15599670 | 0903.4010 | 2009-03-24 | Scalar Multiplet Dark Matter | We perform a systematic study of the phenomenology associated to models where the dark matter consists in the neutral component of a scalar SU(2)_L n-uplet, up to n=7. If one includes only the pure gauge induced annihilation cross-sections it is known that such particles provide good dark matter candidates, leading to ... | [
"hep-ph",
"astro-ph.CO",
"astro-ph.HE"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
20012851 | 0903.4170 | 2009-03-24 | Thermodynamic Fluctuations in Magnetic Phase Transition: Invar as a Prototype | We propose a first-principles formulism for system with spin fluctuations and apply it to the ordered Fe3Pt to uncover the Invar anomalies, including negative thermal expansion and spontaneous magnetization. The theory has coherently predicted the finite temperature intermixing between the fully ferromagnetic configura... | [
"cond-mat.mtrl-sci",
"cond-mat.stat-mech"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "y wang_963",
"name": "Y. Wang",
"publication_history": null,
"h_index": null,
"num_papers": null,
"num_citations": null
},
{
"author_id": "s shang_3",
"name": "Shunli Shang",
"publication_history": null,
"h_index": null,
"num_papers": null,
"num_ci... | null |
24119104 | 0903.4178 | 2009-03-24 | Graphene - a nearly perfect fluid | Hydrodynamics and collision dominated transport are crucial to understand the slow dynamics of many correlated quantum liquids. The ratio \eta/s of the shear viscosity \eta to the entropy density s is uniquely suited to determine how strongly the excitations in a quantum fluid interact. We determine \eta/s in clean und... | [
"cond-mat.mes-hall",
"cond-mat.str-el"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
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