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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3144590 | 0808.4156 | 2008-08-29 | Rate-Distortion via Markov Chain Monte Carlo | We propose an approach to lossy source coding, utilizing ideas from Gibbs sampling, simulated annealing, and Markov Chain Monte Carlo (MCMC). The idea is to sample a reconstruction sequence from a Boltzmann distribution associated with an energy function that incorporates the distortion between the source and reconstru... | [
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{
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"name": "Shirin Jalali",
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"author_id": "t weissman_1",
"name": "Tsachy Weissman",
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9646279 | 0808.4134 | 2008-08-29 | Spectral Sparsification of Graphs | We introduce a new notion of graph sparsificaiton based on spectral similarity of graph Laplacians: spectral sparsification requires that the Laplacian quadratic form of the sparsifier approximate that of the original. This is equivalent to saying that the Laplacian of the sparsifier is a good preconditioner for the La... | [
"cs.DS",
"cs.DM"
] | null | [
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30481085 | 0808.4142 | 2008-08-29 | Observation of the doubly strange b baryon Omega_b- | We report the observation of the doubly strange b baryon Omega_b- in the decay channel Omega_b- to J/psi Omega-, with J/psi to mu+ mu- and Omega- to Lambda K-, in $p\bar{p}$ collisions at $\sqrt{s}=1.96$ TeV. Using approximately 1.3 fb$^{-1}$ of data collected with the D0 detector at the Fermilab Tevatron Collider, we ... | [
"hep-ex"
] | null | [
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{
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"name": "Victor [\"Mukhamedovich\"] Abazov",
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{
"author_id": "b abbott_2",
"name": "B. Abbott",
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2837349 | 0808.4016 | 2008-08-29 | Coarse-graining stochastic biochemical networks: quasi-stationary approximation and fast simulations using a stochastic path integral technique | We propose a universal approach for analysis and fast simulations of stiff stochastic biochemical kinetics networks, which rests on elimination of fast chemical species without a loss of information about mesoscopic, non-Poissonian fluctuations of the slow ones. Our approach, which is similar to the Born-Oppenheimer ap... | [
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"name": "Nikolai [\"A.\"] Sinitsyn",
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"author_id": "n hengartner_1",
"name": "Nicolas [\"W.\"] Hengartner",
"publication_history": null,
"h_index": n... | null |
8280144 | 0809.0016 | 2008-08-29 | An overview of the transmission capacity of wireless networks | This paper surveys and unifies a number of recent contributions that have collectively developed a metric for decentralized wireless network analysis known as transmission capacity. Although it is notoriously difficult to derive general end-to-end capacity results for multi-terminal or \adhoc networks, the transmission... | [
"cs.IT",
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29502494 | 0809.0042 | 2008-08-30 | Evidence for X(3872) --> psi(2S) gamma in B+/- --> X(3872) K+/- decays, and a study of B --> ccbar gamma K | In a search for B --> ccbar gamma K decays with the BaBar detector, where ccbar includes J/psi and psi(2S), and K includes K+, Ks, and K*(892), we find evidence for X(3872) --> J/psi gamma and X(3872) --> psi(2S) gamma with 3.6 sigma and 3.5 sigma significance, respectively. We measure the product of branching fraction... | [
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] | null | [
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"author_id": "b aubert_1",
"name": "Bernard Aubert",
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"author_id": "m bona_1",
"name": "Marcella Bona",
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... | null |
17178383 | 0809.0150 | 2008-08-31 | Asymptotic behaviour of self-contracted planar curves and gradient orbits of convex functions | We hereby introduce and study the notion of self-contracted curves, which encompasses orbits of gradient systems of convex and quasiconvex functions. Our main result shows that bounded self-contracted planar curves have a finite length. We also give an example of a convex function defined in the plane whose gradient or... | [
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2660063 | 0809.0137 | 2008-08-31 | High-Dimensional Menger-Type Curvatures-Part II: d-Separation and a Menagerie of Curvatures | This is the second of two papers wherein we estimate multiscale least squares approximations of certain measures by Menger-type curvatures. More specifically, we study an arbitrary d-regular measure on a real separable Hilbert space. The main result of the paper bounds the least squares error of approximation at any ba... | [
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"name": "J. [\"Tyler\"] Whitehouse",
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13169244 | 0809.0099 | 2008-08-31 | Degrees of Freedom of the $K$ User $M \times N$ MIMO Interference Channel | We provide innerbound and outerbound for the total number of degrees of freedom of the $K$ user multiple input multiple output (MIMO) Gaussian interference channel with $M$ antennas at each transmitter and $N$ antennas at each receiver if the channel coefficients are time-varying and drawn from a continuous distributio... | [
"cs.IT",
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7898033 | 0809.0124 | 2008-08-31 | A Uniform Approach to Analogies, Synonyms, Antonyms, and Associations | Recognizing analogies, synonyms, antonyms, and associations appear to be four distinct tasks, requiring distinct NLP algorithms. In the past, the four tasks have been treated independently, using a wide variety of algorithms. These four semantic classes, however, are a tiny sample of the full range of semantic phenomen... | [
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"cs.IR",
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] | null | [
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] | null | null | null |
14872467 | 0809.0301 | 2008-09-01 | Esscher transform and the duality principle for multidimensional semimartingales | The duality principle in option pricing aims at simplifying valuation problems that depend on several variables by associating them to the corresponding dual option pricing problem. Here, we analyze the duality principle for options that depend on several assets. The asset price processes are driven by general semimart... | [
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] | null | [
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"author_id": "e eberlein_1",
"name": "Ernst Eberlein",
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"author_id": "a papapantoleon_1",
"name": "Antonis Papapantoleon",
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1383204 | 0809.0177 | 2008-09-01 | Limit theorems for additive functionals of a Markov chain | Consider a Markov chain $\{X_n\}_{n\ge 0}$ with an ergodic probability measure $\pi$. Let $\Psi$ a function on the state space of the chain, with $\alpha$-tails with respect to $\pi$, $\alpha\in (0,2)$. We find sufficient conditions on the probability transition to prove convergence in law of $N^{1/\alpha}\sum_n^N \Psi... | [
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"math.MP"
] | null | [
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117951411 | 0809.0326 | 2008-09-01 | Nondeterministic Noiseless Linear Amplification of Quantum Systems | We introduce the concept of non-deterministic noiseless linear amplification. We propose a linear optical realization of this transformation that could be built with current technology. We discuss two applications; ideal probabilistic cloning of coherent states and distillation of continuous variable entanglement. For ... | [
"quant-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
4590558 | 0809.0199 | 2008-09-01 | Dense Error Correction via L1-Minimization | This paper studies the problem of recovering a non-negative sparse signal $\x \in \Re^n$ from highly corrupted linear measurements $\y = A\x + \e \in \Re^m$, where $\e$ is an unknown error vector whose nonzero entries may be unbounded. Motivated by an observation from face recognition in computer vision, this paper pro... | [
"cs.IT",
"math.IT"
] | null | [
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] | null | null | null |
14225881 | 0809.0186 | 2008-09-01 | Subelliptic Estimates for Quadratic Differential Operators | We prove global subelliptic estimates for quadratic differential operators. Quadratic differential operators are operators defined in the Weyl quantization by complex-valued quadratic symbols. In a previous joint work with M. Hitrik, we pointed out the existence of a particular linear subvector space in the phase space... | [
"math.AP"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
17323153 | 0809.0314 | 2008-09-01 | The Deep SWIRE Field I. 20cm Continuum Radio Observations: A Crowded Sky | We present results from deep radio observations taken with the VLA at a center frequency of 1400 MHz cover a region of the SWIRE Spitzer Legacy survey, centered at 10 46 00, 59 01 00 (J2000). The reduction and cataloging of the radio sources are described. The survey presented is the deepest so far in terms of the radi... | [
"astro-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
7782631 | 0809.0269 | 2008-09-01 | Large-scale magnetic topologies of early M dwarfs | We present here additional results of a spectropolarimetric survey of a small sample of stars ranging from spectral type M0 to M8 aimed at investigating observationally how dynamo processes operate in stars on both sides of the full convection threshold (spectral type M4). The present paper focuses on early M stars (M0... | [
"astro-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
926483 | 0809.0240 | 2008-09-01 | Multiple Breakup of Higher-Order Spatial Solitons | The breakup of high-order spatial solitons propagating in an AlGaAs slab waveguide is studied. We experimentally observe the breakup of such beams into multiple fragments and identify the mechanism of this breakup as the combined effect of two- and three-photon-absorption. We show that the multiple breakup persists eve... | [
"physics.optics"
] | null | [
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{
"author_id": "o katz_2",
"name": "Ori Katz",
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"author_id": "y lahini_1",
"name": "Yoav Lahini",
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14588472 | 0809.0444 | 2008-09-02 | Quantum classification | Quantum classification is defined as the task of predicting the associated class of an unknown quantum state drawn from an ensemble of pure states given a finite number of copies of this state. By recasting the state discrimination problem within the framework of Machine Learning (ML), we can use the notion of learning... | [
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"author_id": "s gambs_1",
"name": "Sébastien Gambs",
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}
] | null |
17847197 | 0809.0545 | 2008-09-02 | Frequency Locking of an Optical Cavity using LQG Integral Control | This paper considers the application of integral Linear Quadratic Gaussian (LQG) optimal control theory to a problem of cavity locking in quantum optics. The cavity locking problem involves controlling the error between the laser frequency and the resonant frequency of the cavity. A model for the cavity system, which c... | [
"quant-ph",
"cs.SY"
] | null | [
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"author_id": "s hassen_2",
"name": "Sayed Hassen",
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"author_id": "m heurs_1",
"name": "Michèle Heurs",
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"... | null |
17861001 | 0809.0407 | 2008-09-02 | The Nearest OB Association: Scorpius-Centaurus (Sco OB2) | We summarize observational results on the stellar population and star formation history of the Scorpius-Centaurus OB Association (Sco OB2), the nearest region of recent massive star formation. It consists of three subgroups, Upper Scorpius (US), Upper Centaurus-Lupus (UCL), and Lower Centaurus-Crux (LCC) which have age... | [
"astro-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
15151070 | 0809.0453 | 2008-09-02 | A stochastic model of anomalous heat transport: analytical solution of the steady state | We consider a one-dimensional harmonic crystal with conservative noise, in contact with two stochastic Langevin heat baths at different temperatures. The noise term consists of collisions between neighbouring oscillators that exchange their momenta, with a rate $\gamma$. The stationary equations for the covariance matr... | [
"cond-mat.stat-mech",
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"math.MP",
"nlin.CD"
] | null | [
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] | null | null | null |
1665642 | 0809.0490 | 2008-09-02 | Principal Graphs and Manifolds | In many physical, statistical, biological and other investigations it is desirable to approximate a system of points by objects of lower dimension and/or complexity. For this purpose, Karl Pearson invented principal component analysis in 1901 and found 'lines and planes of closest fit to system of points'. The famous k... | [
"cs.LG",
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"stat.ML"
] | null | [
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"author_id": "a gorban_1",
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"author_id": "a zinovyev_1",
"name": "Andrei [\"Yu.\"] Zinovyev",
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... | null |
1336129 | 0809.0360 | 2008-09-02 | The Complexity of Enriched Mu-Calculi | The fully enriched μ-calculus is the extension of the propositional μ-calculus with inverse programs, graded modalities, and nominals. While satisfiability in several expressive fragments of the fully enriched μ-calculus is known to be decidable and ExpTime-complete, it has recently been proved that the full c... | [
"cs.LO",
"cs.CL"
] | null | [
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] | null | null | null |
11050321 | 0809.0613 | 2008-09-03 | Analysis and synthesis of attractive quantum Markovian dynamics | We propose a general framework for investigating a large class of stabilization problems in Markovian quantum systems. Building on the notions of invariant and attractive quantum subsystem, we characterize attractive subspaces by exploring the structure of the invariant sets for the dynamics. Our general analysis resul... | [
"quant-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
6628297 | 0809.0507 | 2008-09-03 | The chiral ring of AdS3/CFT2 and the attractor mechanism | We study the moduli dependence of the chiral ring in N = (4,4) superconformal field theories, with special emphasis on those CFTs that are dual to type IIB string theory on AdS3xS3xX4. The chiral primary operators are sections of vector bundles, whose connection describes the operator mixing under motion on the moduli ... | [
"hep-th"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
17581579 | 0809.0510 | 2008-09-03 | A New Class of Luminous Transients and A First Census of Their Massive Stellar Progenitors | The progenitors of SN 2008S and the 2008 transient in NGC300 were dust-enshrouded, with extremely red mid-infrared (MIR) colors and relatively low luminosities. The transients were optically faint (-13 < M_V < -15) compared to normal core-collapse supernovae (SNe), and their spectra exhibited narrow emission lines. The... | [
"astro-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
635063 | 0809.0533 | 2008-09-03 | Power Control in Cognitive Radio Networks: How to Cross a Multi-Lane Highway | We consider power control in cognitive radio networks where secondary users identify and exploit instantaneous and local spectrum opportunities without causing unacceptable interference to primary users. We qualitatively characterize the impact of the transmission power of secondary users on the occurrence of spectrum ... | [
"cs.NI"
] | null | [
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{
"author_id": "w ren_9",
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"author_id": "q zhao_67",
"name": "Qing Zhao",
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5623501 | 0809.0719 | 2008-09-03 | A Fast Butterfly Algorithm for the Computation of Fourier Integral Operators | This paper is concerned with the fast computation of Fourier integral operators of the general form $\int_{\R^d} e^{2\pi\i \Phi(x,k)} f(k) d k$, where $k$ is a frequency variable, $\Phi(x,k)$ is a phase function obeying a standard homogeneity condition, and $f$ is a given input. This is of interest for such fundamental... | [
"math.NA"
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"author_id": "e candès_1",
"name": "Emmanuel [\"J.\"] Candès",
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"author_id": "l demanet_1",
"name": "Laurent Demanet",
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15115181 | 0809.0612 | 2008-09-03 | Polarization mesurements of gamma ray bursts and axion like particles | A polarized gamma ray emission spread over a sufficiently wide energy band from a strongly magnetized astrophysical object like gamma ray bursts (GRBs) offers an opportunity to test the hypothesis of axion like particles (ALPs). Based on evidences of polarized gamma ray emission detected in several gamma ray bursts we ... | [
"hep-ph",
"astro-ph",
"hep-ex"
] | null | [
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{
"author_id": "a rubbia_1",
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"author_id": "a sakharov_1",
"name": "Alexander [\"S.\"] Sakharov",
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14788194 | 0809.0745 | 2008-09-03 | Sparse Recovery by Non-convex Optimization -- Instance Optimality | In this note, we address the theoretical properties of $\Delta_p$, a class of compressed sensing decoders that rely on $\ell^p$ minimization with 0<p<1 to recover estimates of sparse and compressible signals from incomplete and inaccurate measurements. In particular, we extend the results of Candes, Romberg and Tao, an... | [
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"author_id": "r saab_1",
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"author_id": "ö yilmaz_1",
"name": "Özgür Yilmaz",
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14485434 | 0809.0635 | 2008-09-03 | Low ML-Decoding Complexity, Large Coding Gain, Full-Rate, Full-Diversity STBCs for 2 X 2 and 4 X 2 MIMO Systems | This paper (Part of the content of this manuscript has been accepted for presentation in IEEE Globecom 2008, to be held in New Orleans) deals with low maximum likelihood (ML) decoding complexity, full-rate and full-diversity space-time block codes (STBCs), which also offer large coding gain, for the 2 transmit antenna,... | [
"cs.IT",
"math.IT"
] | null | [
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17287404 | 0809.0690 | 2008-09-03 | Comparing Community Structure to Characteristics in Online Collegiate Social Networks | We study the structure of social networks of students by examining the graphs of Facebook "friendships" at five American universities at a single point in time. We investigate each single-institution network's community structure and employ graphical and quantitative tools, including standardized pair-counting methods,... | [
"physics.soc-ph",
"physics.data-an"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
17999343 | 0809.0710 | 2008-09-03 | Prospects for Yukawa Unified SO(10) SUSY GUTs at the CERN LHC | The requirement of t-b-\tau Yukawa coupling unification is common in simple grand unified models based on the gauge group SO(10), and it also places a severe constraint on the expected spectrum of superpartners. For Yukawa-unified models with \mu >0, the spectrum is characterized by three mass scales: {\it i}). first a... | [
"hep-ph"
] | null | [
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"author_id": "h baer_1",
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"author_id": "s kraml_1",
"name": "Sabine Kraml",
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20466631 | 0809.0670 | 2008-09-03 | Measurement of discrete energy-level spectra in individual chemically-synthesized gold nanoparticles | We form single-electron transistors from individual chemically-synthesized gold nanoparticles, 5-15 nm in diameter, with monolayers of organic molecules serving as tunnel barriers. These devices allow us to measure the discrete electronic energy levels of individual gold nanoparticles that are, by virtue of chemical sy... | [
"cond-mat.mes-hall"
] | null | [
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{
"author_id": "f kuemmeth_1",
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{
"author_id": "k bolotin_1",
"name": "Kirill [\"I.\"] Bolotin",
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16776470 | 0809.0667 | 2008-09-03 | End-monomer dynamics in semiflexible polymers | Spurred by an experimental controversy in the literature, we investigate the end-monomer dynamics of semiflexible polymers through Brownian hydrodynamic simulations and dynamic mean-field theory. Precise experimental observations over the last few years of end-monomer dynamics in the diffusion of double-stranded DNA ha... | [
"cond-mat.soft"
] | null | [
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{
"author_id": "m hinczewski_1",
"name": "Michael Hinczewski",
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{
"author_id": "x schlagberger_0",
"name": "Xaver Schlagberger",
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"nu... | null |
119203236 | 0809.0631 | 2008-09-03 | Primordial Nucleosynthesis: from precision cosmology to fundamental physics | We present an up-to-date review of Big Bang Nucleosynthesis (BBN). We discuss the main improvements which have been achieved in the past two decades on the overall theoretical framework, summarize the impact of new experimental results on nuclear reaction rates, and critically re-examine the astrophysical determination... | [
"astro-ph",
"hep-ph"
] | null | [
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] | null | null | null |
15025514 | 0809.0686 | 2008-09-03 | Energy Scaling Laws for Distributed Inference in Random Fusion Networks | The energy scaling laws of multihop data fusion networks for distributed inference are considered. The fusion network consists of randomly located sensors distributed i.i.d. according to a general spatial distribution in an expanding region. Among the class of data fusion schemes that enable optimal inference at the fu... | [
"cs.IT",
"cs.NI",
"math.IT",
"math.ST",
"stat.TH"
] | null | [
"target.author.publication_history"
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{
"author_id": "a anandkumar_1",
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},
{
"author_id": "a swami_1",
"name": "Ananthram Swami",
"publication_history": null,
"h_index": null,
"num_papers": n... | null |
55796692 | 0809.0921 | 2008-09-04 | New Pulsating DB White Dwarf Stars from the Sloan Digital Sky Survey | We are searching for new He atmosphere white dwarf pulsators (DBVs) based on the newly found white dwarf stars from the spectra obtained by the Sloan Digital Sky Survey. DBVs pulsate at hotter temperature ranges than their better known cousins, the H atmosphere white dwarf pulsators (DAVs or ZZ Ceti stars). Since the e... | [
"astro-ph"
] | null | [
"target.author.publication_history"
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{
"corpus_id": "16870935",
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{
"corpus_id": "16177234",
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{
"corpus_id": "119459220",
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},
{
"corpus_id": "4552167",
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] | [
{
"author_id": "a nitta_2",
"name": "Atsuko Nitta",
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},
{
"author_id": "s kleinman_1",
"name": "Scott [\"J.\"] Kleinman",
"publication_history": null,
"h_index": null,
"num_papers":... | null |
5930593 | 0809.0835 | 2008-09-04 | Approximating the volume of unions and intersections of high-dimensional geometric objects | We consider the computation of the volume of the union of high-dimensional geometric objects. While showing that this problem is #P-hard already for very simple bodies (i.e., axis-parallel boxes), we give a fast FPRAS for all objects where one can: (1) test whether a given point lies inside the object, (2) sample a poi... | [
"cs.CG",
"cs.NE"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
16331639 | 0809.0847 | 2008-09-04 | Instantaneous Quantum Computation | We examine theoretic architectures and an abstract model for a restricted class of quantum computation, called here instantaneous quantum computation because it allows for essentially no temporal structure within the quantum dynamics. Using the theory of binary matroids, we argue that the paradigm is rich enough to ena... | [
"quant-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
263791964 | 0809.0814 | 2008-09-04 | Nonparametric Denoising of Signals with Unknown Local Structure, I: Oracle Inequalities | We consider the problem of pointwise estimation of multi-dimensional signals $s$, from noisy observations $(y_\tau)$ on the regular grid $\bZd$. Our focus is on the adaptive estimation in the case when the signal can be well recovered using a (hypothetical) linear filter, which can depend on the unknown signal itself. ... | [
"math.ST",
"stat.TH"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
14777961 | 0809.0813 | 2008-09-04 | Large Deviations of Vector-valued Martingales in 2-Smooth Normed Spaces | We derive exponential bounds on probabilities of large deviations for "light tail" martingales taking values in finite-dimensional normed spaces. Our primary emphasis is on the case where the bounds are dimension-independent or nearly so. We demonstrate that this is the case when the norm on the space can be approximat... | [
"math.PR",
"math.ST",
"stat.TH"
] | null | [
"target.author.publication_history.key_reference",
"target.key_reference"
] | null | null | null |
1292495 | 0809.0853 | 2008-09-04 | Estimating divergence functionals and the likelihood ratio by convex risk minimization | We develop and analyze $M$-estimation methods for divergence functionals and the likelihood ratios of two probability distributions. Our method is based on a non-asymptotic variational characterization of $f$-divergences, which allows the problem of estimating divergences to be tackled via convex empirical risk optimiz... | [
"math.ST",
"cs.IT",
"math.IT",
"stat.TH"
] | null | [
"target.author.publication_history.key_reference",
"target.key_reference"
] | null | null | null |
5556708 | 0809.0815 | 2008-09-04 | Solving variational inequalities with Stochastic Mirror-Prox algorithm | In this paper we consider iterative methods for stochastic variational inequalities (s.v.i.) with monotone operators. Our basic assumption is that the operator possesses both smooth and nonsmooth components. Further, only noisy observations of the problem data are available. We develop a novel Stochastic Mirror-Prox (S... | [
"math.OC",
"math.ST",
"stat.TH"
] | null | [
"target.author.publication_history.key_reference",
"target.key_reference"
] | null | null | null |
15338222 | 0809.0791 | 2008-09-04 | On measuring the gravitational-wave background using Pulsar Timing Arrays | Long-term precise timing of Galactic millisecond pulsars holds great promise for measuring the long-period (months-to-years) astrophysical gravitational waves. Several gravitational-wave observational programs, called Pulsar Timing Arrays (PTA), are being pursued around the world. Here we develop a Bayesian algorithm f... | [
"astro-ph",
"gr-qc"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
154496052 | 0809.0822 | 2008-09-04 | How markets slowly digest changes in supply and demand | In this article we revisit the classic problem of tatonnement in price formation from a microstructure point of view, reviewing a recent body of theoretical and empirical work explaining how fluctuations in supply and demand are slowly incorporated into prices. Because revealed market liquidity is extremely low, large ... | [
"q-fin.TR",
"cond-mat.stat-mech",
"physics.soc-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
16569974 | 0809.0881 | 2008-09-04 | Reliable Eigenspectra for New Generation Surveys | We present a novel technique to overcome the limitations of the applicability of Principal Component Analysis to typical real-life data sets, especially astronomical spectra. Our new approach addresses the issues of outliers, missing information, large number of dimensions and the vast amount of data by combining eleme... | [
"astro-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
7265602 | 0809.0916 | 2008-09-04 | Irreversible Monte Carlo Algorithms for Efficient Sampling | Equilibrium systems evolve according to Detailed Balance (DB). This principe guided development of the Monte-Carlo sampling techniques, of which Metropolis-Hastings (MH) algorithm is the famous representative. It is also known that DB is sufficient but not necessary. We construct irreversible deformation of a given rev... | [
"cond-mat.stat-mech",
"cs.IT",
"math.IT",
"math.PR",
"stat.AP"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
119326253 | 0809.0823 | 2008-09-04 | Strangeness production in STAR | We present a summary of strangeness enhancement results comparing data from Cu+Cu and Au+Au collisions at sqrt(SNN) = 200GeV measured by the STAR experiment. Relative yields in central Cu+Cu data seem to be higher than the equivalent sized peripheral Au+Au collision. In addition, strange particle production from these ... | [
"nucl-ex"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
15066773 | 0809.0809 | 2008-09-04 | Optimal operation of feedback flashing ratchets | Feedback flashing ratchets are thermal rectifiers that use information on the state of the system to operate the switching on and off a periodic potential. We discuss different strategies for this operation with the aim of maximizing the net flux of particles in the collective version of a flashing ratchet consisting o... | [
"cond-mat.stat-mech"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
6326550 | 0809.1094 | 2008-09-05 | Low R_v from circumstellar dust around supernovae | The effective extinction law for supernovae surrounded by circumstellar dust is examined by Monte-Carlo simulations. Grains with light scattering properties as for interstellar dust in the Milky-Way (MW) or the Large Magellanic Clouds (LMC), but surrounding the explosion site would cause a semi-diffusive propagation of... | [
"astro-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
17017242 | 0809.1106 | 2008-09-05 | The Mid-Infrared Extinction Law in the Ophiuchus, Perseus, and Serpens Molecular Clouds | We compute the mid-infrared extinction law from 3.6-24 microns in three molecular clouds: Ophiuchus, Perseus, and Serpens, by combining data from the "Cores to Disks" Spitzer Legacy Science program with deep JHKs imaging. Using a new technique, we are able to calculate the line-of-sight extinction law towards each back... | [
"astro-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
14437975 | 0809.1165 | 2008-09-06 | Turbulent Flow in Pipes and Channels as Cross-Stream "Inverse Cascades" of Vorticity | A commonplace view of pressure-driven turbulence in pipes and channels is as "cascades" of streamwise momentum toward the viscous layer at the wall. We present in this paper an alternative picture of these flows as "inverse cascades" of spanwise vorticity, in the cross-stream direction but away from the viscous sublaye... | [
"physics.flu-dyn",
"cond-mat.supr-con"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
118536046 | 0809.1172 | 2008-09-06 | The stellar content of the Hamburg/ESO survey. V. The metallicity distribution function of the Galactic halo | We determine the metallicity distribution function (MDF) of the Galactic halo by means of a sample of 1638 metal-poor stars selected from the Hamburg/ESO objective-prism survey (HES). The sample was corrected for minor biases introduced by the strategy for spectroscopic follow-up observations of the metal-poor candidat... | [
"astro-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
1555309 | 0809.1260 | 2008-09-07 | Necessary and Sufficient Conditions for Success of the Nuclear Norm Heuristic for Rank Minimization | Minimizing the rank of a matrix subject to constraints is a challenging problem that arises in many applications in control theory, machine learning, and discrete geometry. This class of optimization problems, known as rank minimization, is NP-HARD, and for most practical problems there are no efficient algorithms that... | [
"math.OC",
"stat.CO",
"stat.ML"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
14259109 | 0809.1301 | 2008-09-08 | NLO Electroweak Corrections to Higgs Boson Production at Hadron Colliders | Results for the complete NLO electroweak corrections to Standard Model Higgs production via gluon fusion are included in the total cross section for hadronic collisions. Artificially large threshold effects are avoided working in the complex-mass scheme. The numerical impact at LHC (Tevatron) energies is explored for H... | [
"hep-ph",
"hep-ex"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
7530040 | 0809.1394 | 2008-09-08 | First Results from the Catalina Real-time Transient Survey | We report on the results from the first six months of the Catalina Real-time Transient Survey (CRTS). In order to search for optical transients with timescales of minutes to years, the CRTS analyses data from the Catalina Sky Survey which repeatedly covers twenty six thousand of square degrees on the sky. The CRTS prov... | [
"astro-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
119201376 | 0809.1311 | 2008-09-08 | Modified f(R) gravity from scalar-tensor theory and inhomogeneous EoS dark energy | The reconstruction of f(R)-gravity is showed by using an auxiliary scalar field in the context of cosmological evolution, this development provide a way of reconstruct the form of the function f (R) for a given evolution of the Hubble parameter. In analogy, f(R)-gravity may be expressed by a perfect fluid with an inhom... | [
"hep-th"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
2566412 | 0809.1465 | 2008-09-08 | Probabilistic Systems with LimSup and LimInf Objectives | We give polynomial-time algorithms for computing the values of Markov decision processes (MDPs) with limsup and liminf objectives. A real-valued reward is assigned to each state, and the value of an infinite path in the MDP is the limsup (resp. liminf) of all rewards along the path. The value of an MDP is the maximal e... | [
"cs.GT",
"cs.LO"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "k chatterjee_3",
"name": "Krishnendu Chatterjee",
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},
{
"author_id": "t henzinger_1",
"name": "Thomas [\"A.\"] Henzinger",
"publication_history": null,
"h_index": null,
... | null |
18175842 | 0809.1365 | 2008-09-08 | Some notes on trees and paths | These notes cover background material on trees which are used in the paper `On uniqueness of the signature of a path of variation and the reduced path group'. | [
"math.CA",
"math.PR"
] | null | [
"target.author.publication_history"
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{
"author_id": "b hambly_1",
"name": "Ben [\"M.\"] Hambly",
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{
"author_id": "t lyons_3",
"name": "Terry Lyons",
"publication_history": null,
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... | null |
16003826 | 0809.1388 | 2008-09-08 | M31N 2007-11d: A Slowly-Rising, Luminous Nova in M31 | We report a series of extensive photometric and spectroscopic observations of the luminous M31 nova M31N 2007-11d. Our photometric observations coupled with previous measurements show that the nova took at least four days to reach peak brightness at R~14.9 on 20 Nov 2007 UT. After reaching maximum, the time for the nov... | [
"astro-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
11274043 | 0809.1498 | 2008-09-09 | The critical layer in pipe flow at high Reynolds number | We report the computation of a family of traveling wave solutions of pipe flow up to $Re=75000$. As in all lower-branch solutions, streaks and rolls feature prominently in these solutions. For large $Re$, these solutions develop a critical layer away from the wall. Although the solutions are linearly unstable, the two ... | [
"physics.flu-dyn",
"physics.plasm-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
18747450 | 0809.1494 | 2008-09-09 | Photoevaporation of Circumstellar Disks by FUV, EUV and X-ray Radiation from the Central Star | We calculate the rate of photoevaporation of a circumstellar disk by energetic radiation (FUV, 6eV $<h\nu<$13.6eV; EUV, 13.6eV $<h\nu<$0.1keV; and Xrays, $h\nu>0.1$keV) from its central star. We focus on the effects of FUV and X-ray photons since EUV photoevaporation has been treated previously, and consider central st... | [
"astro-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
14999178 | 0809.1487 | 2008-09-09 | Dynamics and statistical mechanics of ultra-cold Bose gases using c-field techniques | We review phase space techniques based on the Wigner representation that provide an approximate description of dilute ultra-cold Bose gases. In this approach the quantum field evolution can be represented using equations of motion of a similar form to the Gross-Pitaevskii equation but with stochastic modifications that... | [
"cond-mat.stat-mech",
"cond-mat.other",
"physics.atom-ph",
"quant-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
16791773 | 0809.1545 | 2008-09-09 | Central limit theorem for a class of one-dimensional kinetic equations | We introduce a class of Boltzmann equations on the real line, which constitute extensions of the classical Kac caricature. The collisional gain operators are defined by smoothing transformations with quite general properties. By establishing a connection to the central limit problem, we are able to prove long-time conv... | [
"math.PR",
"math-ph",
"math.MP"
] | null | [
"target.author.publication_history",
"target.author.publication_history.key_reference"
] | [
{
"corpus_id": "15758746",
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}
] | [
{
"author_id": "f bassetti_1",
"name": "Federico Bassetti",
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},
{
"author_id": "l ladelli_1",
"name": "Lucia Ladelli",
"publication_history": null,
"h_index": null,
"num_papers": nu... | null |
12513119 | 0809.1551 | 2008-09-09 | Consistent Query Answers in the Presence of Universal Constraints | The framework of consistent query answers and repairs has been introduced to alleviate the impact of inconsistent data on the answers to a query. A repair is a minimally different consistent instance and an answer is consistent if it is present in every repair. In this article we study the complexity of consistent quer... | [
"cs.DB"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
119291835 | 0809.1676 | 2008-09-09 | Dynamical phases for the evolution of the entanglement between two oscillators coupled to the same environment | We study the dynamics of the entanglement between two oscillators that are initially prepared in a general two-mode Gaussian state and evolve while coupled to the same environment. In a previous paper we showed that there are three qualitatively different dynamical phases for the entanglement in the long time limit: su... | [
"quant-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
10318479 | 0809.1590 | 2008-09-09 | When is there a representer theorem? Vector versus matrix regularizers | We consider a general class of regularization methods which learn a vector of parameters on the basis of linear measurements. It is well known that if the regularizer is a nondecreasing function of the inner product then the learned vector is a linear combination of the input data. This result, known as the {\em repres... | [
"cs.LG"
] | null | [
"target.author.publication_history",
"target.author.publication_history.key_reference"
] | [
{
"corpus_id": "947596",
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}
] | [
{
"author_id": "a argyriou_2",
"name": "Andreas Argyriou",
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},
{
"author_id": "c micchelli_1",
"name": "Charles [\"A.\"] Micchelli",
"publication_history": null,
"h_index": null,
"n... | null |
9978593 | 0809.1802 | 2008-09-10 | Automatic Identification and Data Extraction from 2-Dimensional Plots in Digital Documents | Most search engines index the textual content of documents in digital libraries. However, scholarly articles frequently report important findings in figures for visual impact and the contents of these figures are not indexed. These contents are often invaluable to the researcher in various fields, for the purposes of d... | [
"cs.CV"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "w browuer_0",
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},
{
"author_id": "s kataria_1",
"name": "Saurabh Kataria",
"publication_history": null,
"h_index": null,
"num_papers": nul... | null |
17329927 | 0809.1864 | 2008-09-10 | On the invariant measure of the random difference equation $X_n=A_n X_{n-1}+ B_n$ in the critical case | We consider the autoregressive model on $\R^d$ defined by the following stochastic recursion $X_n = A_n X_{n-1}+B_n$, where $\{(B_n,A_n)\}$ are i.i.d. random variables valued in $\R^d\times \R^+$. The critical case, when $\E\big[\log A_1\big]=0$, was studied by Babillot, Bougeorol and Elie, who proved that there exists... | [
"math.PR"
] | null | [
"target.author.publication_history"
] | [
{
"corpus_id": "55145334",
"num_citations": null
}
] | [
{
"author_id": "s brofferio_0",
"name": "Sara Brofferio",
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},
{
"author_id": "d buraczewski_1",
"name": "Dariusz Buraczewski",
"publication_history": null,
"h_index": null,
"num_pap... | null |
15675192 | 0809.1737 | 2008-09-10 | Multiwavelength observations of 3C 454.3. I. The AGILE 2007 November campaign on the "Crazy Diamond" | [Abridged] We report on a multiwavelength observation of the blazar 3C 454.3 (which we dubbed "crazy diamond") carried out on November 2007 by means of the astrophysical satellites AGILE, INTEGRAL, Swift, the WEBT Consortium, and the optical-NIR telescope REM. 3C 454.3 is detected at a $\sim 19-\sigma$ level during the... | [
"astro-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
55801261 | 0809.1740 | 2008-09-10 | Differing perceptions on the landing of the rod into the slot | In the usual rod and slot paradox, the rod, if it falls, was expected to fall into the slot due to gravity. Many thought experiments have been conducted where the presence of gravity is eliminated with the rod and slot approaching each other along a line joining their centers, whereby the considerations come strictly u... | [
"physics.gen-ph"
] | null | [
"target.key_reference"
] | null | null | null |
14450960 | 0809.2101 | 2008-09-11 | COSMOS Photometric Redshifts with 30-bands for 2-deg2 | We present accurate photometric redshifts in the 2-deg2 COSMOS field. The redshifts are computed with 30 broad, intermediate, and narrow bands covering the UV (GALEX), Visible-NIR (Subaru, CFHT, UKIRT and NOAO) and mid-IR (Spitzer/IRAC). A chi2 template-fitting method (Le Phare) was used and calibrated with large spect... | [
"astro-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
14748581 | 0809.2037 | 2008-09-11 | The Efficiency of Quantum Identity Testing of Multiple States | We examine two quantum operations, the Permutation Test and the Circle Test, which test the identity of n quantum states. These operations naturally extend the well-studied Swap Test on two quantum states. We first show the optimality of the Permutation Test for any input size n as well as the optimality of the Circle ... | [
"quant-ph"
] | null | [
"target.author.publication_history"
] | [
{
"corpus_id": "2129673",
"num_citations": null
}
] | [
{
"author_id": "m kada_0",
"name": "Masaru Kada",
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},
{
"author_id": "h nishimura_1",
"name": "Harumichi Nishimura",
"publication_history": null,
"h_index": null,
"num_papers": null... | null |
14439218 | 0809.1985 | 2008-09-11 | Affine Models | Affine term structure models have gained significant attention in the finance literature, mainly due to their analytical tractability and statistical flexibility. The aim of this article is to present both theoretical foundations as well as empirical aspects of the affine model class. Starting from the original one-fac... | [
"q-fin.PR",
"math.PR"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "c cuchiero_1",
"name": "Christa Cuchiero",
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},
{
"author_id": "d filipović_1",
"name": "Damir Filipović",
"publication_history": null,
"h_index": null,
"num_papers":... | null |
18240244 | 0809.2000 | 2008-09-11 | Rough Volterra equations 1: the algebraic integration setting | We define and solve Volterra equations driven by an irregular signal, by means of a variant of the rough path theory called algebraic integration. In the Young case, that is for a driving signal with H\"older exponent greater than 1/2, we obtain a global solution, and are able to handle the case of a singular Volterra ... | [
"math.PR"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
33185620 | 0809.1907 | 2008-09-11 | Quantum Connectivity of Space-Time and Gravitationally Induced Decorrelation of Entanglement | We discuss an alternative formulation of the problem of quantum optical fields in a curved space-time using localized operators. We contrast the new formulation with the standard approach and find observable differences for entangled states. We propose an experiment in which an entangled pair of optical pulses are prop... | [
"quant-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
43739895 | 0809.1917 | 2008-09-11 | Profiling the interface electron gas of LaAlO3/SrTiO3 heterostructures by hard X-ray photoelectron spectroscopy | The conducting interface of LaAlO$_3$/SrTiO$_3$ heterostructures has been studied by hard X-ray photoelectron spectroscopy. From the Ti~2$p$ signal and its angle-dependence we derive that the thickness of the electron gas is much smaller than the probing depth of 4 nm and that the carrier densities vary with increasing... | [
"cond-mat.str-el"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "m sing_1",
"name": "Michael Sing",
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},
{
"author_id": "g berner_1",
"name": "Götz Berner",
"publication_history": null,
"h_index": null,
"num_papers": null,
"num... | null |
118674973 | 0809.2112 | 2008-09-11 | Near-Infrared spectral diagnostics for unresolved stellar population galaxies | We want to develop spectral diagnostics of stellar populations in the near-infrared (NIR), for unresolved stellar populations. We created a semi-empirical population model and we compare the model output with the observed spectra of a sample of elliptical and bulge-dominated galaxies that have reliable Lick-indices fro... | [
"astro-ph"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "a heiderman_1",
"name": "Amanda Heiderman",
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},
{
"author_id": "s jogee_1",
"name": "Shardha Jogee",
"publication_history": null,
"h_index": null,
"num_papers": null... | null |
488434 | 0809.2085 | 2008-09-11 | Clustered Multi-Task Learning: A Convex Formulation | In multi-task learning several related tasks are considered simultaneously, with the hope that by an appropriate sharing of information across tasks, each task may benefit from the others. In the context of learning linear functions for supervised classification or regression, this can be achieved by including a priori... | [
"cs.LG"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
14357349 | 0809.2172 | 2008-09-12 | Concentration-compactness phenomena in the higher order Liouville's equation | We investigate different concentration-compactness phenomena related to the Q-curvature in arbitrary even dimension. We first treat the case of an open domain in $R^{2m}$, then that of a closed manifold and, finally, the particular case of the sphere $S^{2m}$. In all cases we allow the sign of the Q-curvature to vary, ... | [
"math.AP",
"math.DG",
"math.FA"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
2820448 | 0809.2226 | 2008-09-12 | Relay vs. User Cooperation in Time-Duplexed Multiaccess Networks | The performance of user-cooperation in a multi-access network is compared to that of using a wireless relay. Using the total transmit and processing power consumed at all nodes as a cost metric, the outage probabilities achieved by dynamic decode-and-forward (DDF) and amplify-and-forward (AF) are compared for the two n... | [
"cs.IT",
"math.IT"
] | null | [
"target.author.publication_history"
] | [
{
"corpus_id": "884827",
"num_citations": null
}
] | [
{
"author_id": "l sankar_1",
"name": "L. Sankar",
"publication_history": null,
"h_index": null,
"num_papers": null,
"num_citations": null
},
{
"author_id": "g kramer_1",
"name": "Gerhard Kramer",
"publication_history": null,
"h_index": null,
"num_papers": null,
"n... | null |
16748115 | 0809.2274 | 2008-09-12 | A randomized algorithm for principal component analysis | Principal component analysis (PCA) requires the computation of a low-rank approximation to a matrix containing the data being analyzed. In many applications of PCA, the best possible accuracy of any rank-deficient approximation is at most a few digits (measured in the spectral norm, relative to the spectral norm of the... | [
"stat.CO"
] | null | [
"target.author.publication_history",
"target.author.publication_history.key_reference"
] | [] | [
{
"author_id": "v rokhlin_1",
"name": "Vladimir Rokhlin",
"publication_history": null,
"h_index": null,
"num_papers": null,
"num_citations": null
},
{
"author_id": "a szlam_1",
"name": "Arthur Szlam",
"publication_history": null,
"h_index": null,
"num_papers": null,
... | null |
119299998 | 0809.2262 | 2008-09-12 | Dilepton production from polarized hadron hadron collisions | In this paper we present a comprehensive formalism for dilepton production from the collision of two polarized spin-$\tfrac{1}{2}$ hadrons by identifying the general angular distribution of the cross section in combination with a complete set of structure functions. The various structure functions are computed in the p... | [
"hep-ph",
"hep-ex"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
12124939 | 0809.2129 | 2008-09-12 | Exact Results for the Kuramoto Model with a Bimodal Frequency Distribution | We analyze a large system of globally coupled phase oscillators whose natural frequencies are bimodally distributed. The dynamics of this system has been the subject of long-standing interest. In 1984 Kuramoto proposed several conjectures about its behavior; ten years later, Crawford obtained the first analytical resul... | [
"nlin.PS",
"nlin.AO"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "e martens_0",
"name": "Erik [\"Andreas\"] Martens",
"publication_history": null,
"h_index": null,
"num_papers": null,
"num_citations": null
},
{
"author_id": "e barreto_1",
"name": "Ernest Barreto",
"publication_history": null,
"h_index": null,
"num_pa... | null |
118378421 | 0809.2263 | 2008-09-12 | Cusps on cosmic superstrings with junctions | The existence of cusps on non-periodic strings ending on D-branes is demonstrated and the conditions, for which such cusps are generic, are derived. The dynamics of F-, D-string and FD-string junctions are investigated. It is shown that pairs of FD-string junctions, such as would form after intercommutations of F- and ... | [
"hep-th",
"astro-ph",
"gr-qc",
"hep-ph"
] | null | [
"target.author.publication_history"
] | [
{
"corpus_id": "119252142",
"num_citations": null
}
] | [
{
"author_id": "a davis_9",
"name": "A. [\"C.\"] Davis",
"publication_history": null,
"h_index": null,
"num_papers": null,
"num_citations": null
},
{
"author_id": "w nelson_2",
"name": "William Nelson",
"publication_history": null,
"h_index": null,
"num_papers": null,... | null |
3151368 | 0809.2362 | 2008-09-13 | APOGEE: The Apache Point Observatory Galactic Evolution Experiment | APOGEE is a large-scale, NIR, high-resolution (R~20,000) spectroscopic survey of Galactic stars. It is one of the four experiments in SDSS-III. Because APOGEE will observe in the H band, it will be the first survey to pierce through Galactic dust and provide a vast, uniform database of chemical abundances and radial ve... | [
"astro-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
118452449 | 0809.2384 | 2008-09-14 | Influences of degree inhomogeneity on average path length and random walks in disassortative scale-free networks | Various real-life networks exhibit degree correlations and heterogeneous structure, with the latter being characterized by power-law degree distribution $P(k)\sim k^{-\gamma}$, where the degree exponent $\gamma$ describes the extent of heterogeneity. In this paper, we study analytically the average path length (APL) of... | [
"physics.soc-ph",
"cond-mat.stat-mech"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "z zhang_150",
"name": "Zhongzhi Zhang",
"publication_history": null,
"h_index": null,
"num_papers": null,
"num_citations": null
},
{
"author_id": "y zhang_145",
"name": "Yichao Zhang",
"publication_history": null,
"h_index": null,
"num_papers": null,
... | null |
2642682 | 0809.2386 | 2008-09-14 | Datalog and Constraint Satisfaction with Infinite Templates | On finite structures, there is a well-known connection between the expressive power of Datalog, finite variable logics, the existential pebble game, and bounded hypertree duality. We study this connection for infinite structures. This has applications for constraint satisfaction with infinite templates. If the template... | [
"cs.LO",
"cs.CC"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
16457072 | 0809.2411 | 2008-09-14 | Structures of the magnetoionic media around the FR I radio galaxies 3C 31 and Hydra A | We use high-quality VLA images of the Fanaroff & Riley Class I radio galaxy 3C 31 at six frequencies in the range 1365 to 8440MHz to explore the spatial scale and origin of the rotation measure (RM) fluctuations on the line of sight to the radio source. We analyse the distribution of the degree of polarization to show ... | [
"astro-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
20602896 | 0809.2430 | 2008-09-15 | Ergodic Properties of Fractional Brownian-Langevin Motion | We investigate the time average mean square displacement $\overline{\delta^2}(x(t))=\int_0^{t-\Delta}[x(t^\prime+\Delta)-x(t^\prime)]^2 dt^\prime/(t-\Delta)$ for fractional Brownian and Langevin motion. Unlike the previously investigated continuous time random walk model $\overline{\delta^2}$ converges to the ensemble ... | [
"physics.data-an",
"astro-ph",
"cond-mat.stat-mech"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
10894984 | 0809.2508 | 2008-09-15 | A fast approach for overcomplete sparse decomposition based on smoothed L0 norm | In this paper, a fast algorithm for overcomplete sparse decomposition, called SL0, is proposed. The algorithm is essentially a method for obtaining sparse solutions of underdetermined systems of linear equations, and its applications include underdetermined Sparse Component Analysis (SCA), atomic decomposition on overc... | [
"cs.IT",
"math.IT"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
4424735 | 0809.2442 | 2008-09-15 | Event-horizon-scale structure in the supermassive black hole candidate at the Galactic Centre | The cores of most galaxies are thought to harbour supermassive black holes, which power galactic nuclei by converting the gravitational energy of accreting matter into radiation (ref 1). Sagittarius A*, the compact source of radio, infrared and X-ray emission at the centre of the Milky Way, is the closest example of th... | [
"astro-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
18297726 | 0809.2554 | 2008-09-15 | Simpler Analyses of Local Search Algorithms for Facility Location | We study local search algorithms for metric instances of facility location problems: the uncapacitated facility location problem (UFL), as well as uncapacitated versions of the $k$-median, $k$-center and $k$-means problems. All these problems admit natural local search heuristics: for example, in the UFL problem the na... | [
"cs.DS"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
113388 | 0809.2506 | 2008-09-15 | Exponential functionals of Brownian motion and class-one Whittaker functions | We consider exponential functionals of a multi-dimensional Brownian motion with drift, defined via a collection of linear functionals. We give a characterization of the Laplace transform of their joint law as the unique bounded solution, up to a constant factor, to a Schrodinger-type partial differential equation. We d... | [
"math.PR"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
119183361 | 0809.2582 | 2008-09-15 | Charmonium in lattice QCD and the non-relativistic quark-model | We compare the results of a numerical lattice QCD calculation of the charmonium spectrum with the structure of a general non-relativistic potential model. To achieve this we form the non-relativistic reduction of derivative-based fermion bilinear interpolating fields used in lattice QCD calculations and compute their o... | [
"hep-ph",
"hep-lat"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "j dudek_2",
"name": "Jozef [\"J.\"] Dudek",
"publication_history": null,
"h_index": null,
"num_papers": null,
"num_citations": null
},
{
"author_id": "e rrapaj_1",
"name": "Ermal Rrapaj",
"publication_history": null,
"h_index": null,
"num_papers": null... | null |
10874392 | 0809.2493 | 2008-09-15 | Hardness and Algorithms for Rainbow Connection | An edge-colored graph $G$ is {\em rainbow connected} if any two vertices are connected by a path whose edges have distinct colors. The {\em rainbow connection} of a connected graph $G$, denoted $rc(G)$, is the smallest number of colors that are needed in order to make $G$ rainbow connected. In the first result of this ... | [
"math.CO"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
17161561 | 0809.2812 | 2008-09-16 | Direct evidence of a sub-stellar companion around CT Cha | In our ongoing search for close and faint companions around T Tauri stars, we found a very faint (Ks=14.9mag, Ks_0=14.4mag) object, just ~2.67" northwest of the Chamaeleon star-forming region member CT Cha corresponding to a projected separation of ~440AU at 165+/-30 pc. We show that CT Cha A and this faint object form... | [
"astro-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
8894302 | 0809.2781 | 2008-09-16 | The Least Luminous Galaxy: Spectroscopy of the Milky Way Satellite Segue 1 | We present Keck/DEIMOS spectroscopy of Segue 1, an ultra-low luminosity (M_V = -1.5) Milky Way satellite companion. While the combined size and luminosity of Segue 1 are consistent with either a globular cluster or a dwarf galaxy, we present spectroscopic evidence that this object is a dark matter-dominated dwarf galax... | [
"astro-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
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