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118487406
0709.2092
2007-09-13
Matching NLO QCD computations with Parton Shower simulations: the POWHEG method
The aim of this work is to describe in detail the POWHEG method, first suggested by one of the authors, for interfacing parton-shower generators with NLO QCD computations. We describe the method in its full generality, and then specify its features in two subtraction frameworks for NLO calculations: the Catani-Seymour ...
[ "hep-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
7316883
0709.2222
2007-09-14
Stochastic Variational Partitioned Runge-Kutta Integrators for Constrained Systems
Stochastic variational integrators for constrained, stochastic mechanical systems are developed in this paper. The main results of the paper are twofold: an equivalence is established between a stochastic Hamilton-Pontryagin (HP) principle in generalized coordinates and constrained coordinates via Lagrange multipliers,...
[ "math.NA", "math.PR" ]
null
[ "target.author.publication_history" ]
[ { "corpus_id": "8726449", "num_citations": null } ]
[ { "author_id": "n bou-rabee_1", "name": "Nawaf Bou-Rabee", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "h owhadi_1", "name": "Houman Owhadi", "publication_history": null, "h_index": null, "num_papers": null...
null
15008454
0709.2190
2007-09-14
White Dwarf Luminosity and Mass Functions from Sloan Digital Sky Survey Spectra
We present the first phase in our ongoing work to use Sloan Digital Sky Survey (SDSS) data to create separate white dwarf (WD) luminosity functions for two or more different mass ranges. In this paper, we determine the completeness of the SDSS spectroscopic white dwarf sample by comparing a proper-motion selected sampl...
[ "astro-ph" ]
null
[ "target.author.publication_history" ]
[ { "corpus_id": "7618785", "num_citations": null }, { "corpus_id": "11578410", "num_citations": null }, { "corpus_id": "10892288", "num_citations": null }, { "corpus_id": "13829139", "num_citations": null }, { "corpus_id": "10376400", "num_citations": null },...
[ { "author_id": "s degennaro_1", "name": "Steven DeGennaro", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "t von hippel_1", "name": "Ted von Hippel", "publication_history": null, "h_index": null, "num_papers"...
null
16879612
0709.2301
2007-09-14
Constraints on decaying Dark Matter from XMM-Newton observations of M31
We derive constraints on parameters of the radiatively decaying Dark Matter (DM) particles, using XMM-Newton EPIC spectra of the Andromeda galaxy (M31). Using the observations of the outer (5'-13') parts of M31 we improve the existing constraints. For the case of sterile neutrino DM, combining our constraints with the ...
[ "astro-ph", "hep-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
8563539
0709.2205
2007-09-14
Newton's method on Gra{\ss}mann manifolds
A general class of Newton algorithms on Gra{\ss}mann and Lagrange-Gra{\ss}mann manifolds is introduced, that depends on an arbitrary pair of local coordinates. Local quadratic convergence of the algorithm is shown under a suitable condition on the choice of coordinate systems. Our result extends and unifies previous co...
[ "math.OC", "math.DG", "math.NA" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
7039268
0709.2340
2007-09-14
Robust Dimension Reduction, Fusion Frames, and Grassmannian Packings
We consider estimating a random vector from its noisy projections onto low dimensional subspaces constituting a fusion frame. A fusion frame is a collection of subspaces, for which the sum of the projection operators onto the subspaces is bounded below and above by constant multiples of the identity operator. We first ...
[ "math.FA" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[ { "corpus_id": "10895494", "num_citations": null } ]
[ { "author_id": "g kutyniok_1", "name": "Gitta Kutyniok", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "a pezeshki_1", "name": "Ali Pezeshki", "publication_history": null, "h_index": null, "num_papers": null,...
null
16939139
0709.2233
2007-09-14
Pseudo-maximization and self-normalized processes
Self-normalized processes are basic to many probabilistic and statistical studies. They arise naturally in the the study of stochastic integrals, martingale inequalities and limit theorems, likelihood-based methods in hypothesis testing and parameter estimation, and Studentized pivots and bootstrap-$t$ methods for conf...
[ "math.PR" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
1252667
0709.2446
2007-09-15
Learning for Dynamic Bidding in Cognitive Radio Resources
In this paper, we model the various wireless users in a cognitive radio network as a collection of selfish, autonomous agents that strategically interact in order to acquire the dynamically available spectrum opportunities. Our main focus is on developing solutions for wireless users to successfully compete with each o...
[ "cs.LG", "cs.GT" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "f fu_3", "name": "Fangwen Fu", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "m schaar_1", "name": "Mihaela [\"van\",\"der\"] Schaar", "publication_history": null, "h_index": null, "num_papers...
null
1310911
0709.2410
2007-09-15
Distributed Decision Through Self-Synchronizing Sensor Networks in the Presence of Propagation Delays and Asymmetric Channels
In this paper we propose and analyze a distributed algorithm for achieving globally optimal decisions, either estimation or detection, through a self-synchronization mechanism among linearly coupled integrators initialized with local measurements. We model the interaction among the nodes as a directed graph with weight...
[ "cs.MA", "cs.DC" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[ { "corpus_id": "308", "num_citations": null } ]
[ { "author_id": "g scutari_1", "name": "Gesualdo Scutari", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "s barbarossa_1", "name": "Sergio Barbarossa", "publication_history": null, "h_index": null, "num_papers...
null
118735678
0709.2376
2007-09-15
LBT Discovery of a Yellow Supergiant Eclipsing Binary in the Dwarf Galaxy Holmberg IX
In a variability survey of M81 using the Large Binocular Telescope we have discovered a peculiar eclipsing binary (MV ~ -7.1) in the field of the dwarf galaxy Holmberg IX. It has a period of 272 days and the light curve is well-fit by an overcontact model in which both stars are overflowing their Roche lobes. It is com...
[ "astro-ph" ]
null
[ "target.author.publication_history" ]
[ { "corpus_id": "26430584", "num_citations": null }, { "corpus_id": "9481164", "num_citations": null }, { "corpus_id": "42100478", "num_citations": null } ]
[ { "author_id": "j prieto_3", "name": "Jose [\"L.\"] Prieto", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "k stanek_1", "name": "Krzysztof [\"Zbigniew\"] Stanek", "publication_history": null, "h_index": null, ...
null
10605006
0709.2445
2007-09-15
A Simple Characterization of Strategic Behaviors in Broadcast Channels
In this paper, we consider the problem of resource allocation among two competing users sharing a binary symmetric broadcast channel. We model the interaction between autonomous selfish users in the resource allocation and analyze their strategic behavior in manipulating the allocation outcome. We analytically show tha...
[ "cs.IT", "cs.GT", "math.IT" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "y su_75", "name": "Yi Su", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "m schaar_1", "name": "Mihaela [\"van\",\"der\"] Schaar", "publication_history": null, "h_index": null, "num_papers": n...
null
1187632
0709.2514
2007-09-16
Time Optimal Attitude Control for a Rigid Body
A time optimal attitude control problem is studied for the dynamics of a rigid body. The objective is to minimize the time to rotate the rigid body to a desired attitude and angular velocity while subject to constraints on the control input. Necessary conditions for optimality are developed directly on the special orth...
[ "math.OC" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
15937410
0709.2385
2007-09-17
Applications of Fast Convolution on the Sphere
We present several diverse applications of the spherical fast convolution method suggested by Wandelt and Gorski (2001), which is useful for studies of telescope optical properties and for construction of shaped filters for analysis of all-sky data. We study sidelobe pickup in three design concepts for the CALISTO infr...
[ "astro-ph" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "k huffenberger_1", "name": "Kevin [\"M.\"] Huffenberger", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "i o'dwyer_1", "name": "Ian O'Dwyer", "publication_history": null, "h_index": null, "num...
null
10077952
0709.2646
2007-09-17
Markov models for accumulating mutations
We introduce and analyze a waiting time model for the accumulation of genetic changes. The continuous time conjunctive Bayesian network is defined by a partially ordered set of mutations and by the rate of fixation of each mutation. The partial order encodes constraints on the order in which mutations can fixate in the...
[ "q-bio.PE", "math.CO" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[ { "corpus_id": "12122155", "num_citations": null } ]
[ { "author_id": "n beerenwinkel_1", "name": "Niko Beerenwinkel", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "s sullivant_1", "name": "Seth Sullivant", "publication_history": null, "h_index": null, "num_pape...
null
118393588
0709.2545
2007-09-17
Non-Gaussianity in the modulated reheating scenario
We investigate the non-Gaussianity of primordial curvature perturbation in the modulated reheating scenario where the primordial perturbation is generated due to the spacial fluctuation of the inflaton decay rate to radiation. We use the $\delta N$ formalism to evaluate the trispectrum of curvature perturbation as well...
[ "astro-ph", "hep-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
14614531
0709.2652
2007-09-17
The intracluster magnetic field power spectrum in Abell 2382
The goal of this work is to put constraints on the strength and structure of the magnetic field in the cluster of galaxies A2382. We investigate the relationship between magnetic field and Faraday rotation effects in the cluster, using numerical simulations as a reference for the observed polarization properties. For t...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
119230843
0709.2380
2007-09-17
Do Evaporating Black Holes Form Photospheres?
Several authors, most notably Heckler, have claimed that the observable Hawking emission from a microscopic black hole is significantly modified by the formation of a photosphere around the black hole due to QED or QCD interactions between the emitted particles. In this paper we analyze these claims and identify a numb...
[ "astro-ph", "gr-qc", "hep-th" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
2106187
0710.4522
2007-09-17
A Century of Cosmology: A Direct Precision Measurement of the Intergalactic Lyman-alpha Opacity at 2<z<4.2
We directly measure the evolution of the intergalactic Lyman-alpha effective optical depth, tau_eff, over the redshift range 2<z<4.2 from a sample of 86 high-resolution, high-signal-to-noise quasar spectra obtained with Keck/ESI, Keck/HIRES, and Magellan/MIKE. We find that our estimates of the quasar continuum levels i...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
2211044
0709.2917
2007-09-18
Measurement of the p\bar{p}\to WZ + X cross section at \sqrt{s}=1.96 TeV and limits on WWZ trilinear gauge couplings
We present measurements of the process $p\bar{p} \to WZ+X \to \ell^{\prime} \nu_{\ell^{\prime}} \ell \bar{\ell}$ at $\sqrt{s}=1.96$ TeV, where $\ell$ and $\ell^{\prime}$ are electrons or muons. Using 1 fb$^{-1}$ of data from the D0 experiment, we observe 13 candidates with an expected background of $4.5\pm0.6$ events a...
[ "hep-ex" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "v abazov_1", "name": "Victor [\"Mukhamedovich\"] Abazov", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "b abbott_2", "name": "B. Abbott", "publication_history": null, "h_index": null, "num_pa...
null
5374839
0709.2851
2007-09-18
Joint power control and user scheduling in multicell wireless networks: Capacity scaling laws
We address the optimization of the sum rate performance in multicell interference-limited singlehop networks where access points are allowed to cooperate in terms of joint resource allocation. The resource allocation policies considered here combine power control and user scheduling. Although very promising from a conc...
[ "cs.IT", "math.IT" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "d gesbert_1", "name": "David Gesbert", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "m kountouris_2", "name": "Marios Kountouris", "publication_history": null, "h_index": null, "num_papers": ...
null
118501192
0709.2829
2007-09-18
Theory of biphoton generation in a single-resonant optical parametric oscillator far below threshold
We present a quantum-theoretical treatment of biphoton generation in single-resonant type-II parametric down-conversion. The nonlinear medium is continuously pumped and is placed inside a cavity which is resonant for the signal field, but nonresonant for the idler deflected by an intra-cavity polarizing beam splitter. ...
[ "quant-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
119197982
0709.2717
2007-09-18
Autocorrelations and Thermal Fragility of Anyonic Loops in Topologically Quantum Ordered Systems
Are systems that display Topological Quantum Order (TQO), and have a gap to excitations, hardware fault-tolerant at finite temperatures? We show that in surface code models that display low d-dimensional Gauge-Like Symmetries, such as Kitaev's and its generalizations, the expectation value of topological symmetry opera...
[ "cond-mat.str-el", "cond-mat.mes-hall", "quant-ph" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[]
[ { "author_id": "z nussinov_1", "name": "Zohar Nussinov", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "g ortiz_1", "name": "Gerardo [\"Guzman\"] Ortiz", "publication_history": null, "h_index": null, "num_pap...
null
29475800
0709.2898
2007-09-18
Allowed charge transfers between coherent conductors driven by a time-dependent scatterer
We derive constraints on the statistics of the charge transfer between two conductors in the model of arbitrary time-dependent instant scattering of non-interacting fermions at zero temperature. The constraints are formulated in terms of analytic properties of the generating function: its zeroes must lie on the negativ...
[ "cond-mat.mes-hall" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "a abanov_1", "name": "Alexander [\"G.\"] Abanov", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "a abanov_1", "name": "Alexander [\"G.\"] Abanov", "publication_history": null, "h_index": null, ...
null
119240551
0709.2872
2007-09-18
A Macroscopic Description of Coherent Geo-Magnetic Radiation from Cosmic Ray Air Showers
We have developed a macroscopic description of coherent electro-magnetic radiation from air showers initiated by ultra-high energy cosmic rays due to the presence of the geo-magnetic field. This description offers a simple and direct insight in the relation between the properties of the air shower and the time-structur...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
7242340
0709.2772
2007-09-18
Modelling discontinuities and Kelvin-Helmholtz instabilities in SPH
In this paper we discuss the treatment of discontinuities in Smoothed Particle Hydrodynamics (SPH) simulations. In particular we discuss the difference between integral and differential representations of the fluid equations in an SPH context and how this relates to the formulation of dissip ative terms for the capture...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
3258447
0709.3034
2007-09-19
Query Evaluation in P2P Systems of Taxonomy-based Sources: Algorithms, Complexity, and Optimizations
In this study, we address the problem of answering queries over a peer-to-peer system of taxonomy-based sources. A taxonomy states subsumption relationships between negation-free DNF formulas on terms and negation-free conjunctions of terms. To the end of laying the foundations of our study, we first consider the centr...
[ "cs.DB", "cs.DC", "cs.DS", "cs.LO" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "c meghini_1", "name": "Carlo Meghini", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "y tzitzikas_1", "name": "Yannis Tzitzikas", "publication_history": null, "h_index": null, "num_papers": nu...
null
5750442
0709.2967
2007-09-19
Least squares volatility change point estimation for partially observed diffusion processes
A one dimensional diffusion process $X=\{X_t, 0\leq t \leq T\}$, with drift $b(x)$ and diffusion coefficient $\sigma(\theta, x)=\sqrt{\theta} \sigma(x)$ known up to $\theta>0$, is supposed to switch volatility regime at some point $t^*\in (0,T)$. On the basis of discrete time observations from $X$, the problem is the o...
[ "math.ST", "math.PR", "stat.AP", "stat.TH" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
17048798
0709.2944
2007-09-19
On the state space geometry of the Kuramoto-Sivashinsky flow in a periodic domain
The continuous and discrete symmetries of the Kuramoto-Sivashinsky system restricted to a spatially periodic domain play a prominent role in shaping the invariant sets of its chaotic dynamics. The continuous spatial translation symmetry leads to relative equilibrium (traveling wave) and relative periodic orbit (modulat...
[ "nlin.CD" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
16663166
0709.3044
2007-09-19
Determinants of (generalised) Catalan numbers
We show that recent determinant evaluations involving Catalan numbers and generalisations thereof have most convenient explanations by combining the Lindstr\"om-Gessel-Viennot theorem on non-intersecting lattice paths with a simple determinant lemma from [Manuscripta Math. 69 (1990), 173-202]. This approach leads also ...
[ "math.CO" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
3005313
0709.3110
2007-09-19
A tail inequality for suprema of unbounded empirical processes with applications to Markov chains
We present a tail inequality for suprema of empirical processes generated by variables with finite $\psi_\alpha$ norms and apply it to some geometrically ergodic Markov chains to derive similar estimates for empirical processes of such chains, generated by bounded functions. We also obtain a bounded difference inequali...
[ "math.PR" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
18741059
0709.2938
2007-09-19
Near linear time algorithm to detect community structures in large-scale networks
Community detection and analysis is an important methodology for understanding the organization of various real-world networks and has applications in problems as diverse as consensus formation in social communities or the identification of functional modules in biochemical networks. Currently used algorithms that iden...
[ "physics.soc-ph" ]
null
[ "target.author.publication_history.key_reference", "target.key_reference" ]
null
null
null
18107302
0709.2951
2007-09-19
The population of AM CVn stars from the Sloan Digital Sky Survey
The AM Canum Venaticorum stars are rare interacting white dwarf binaries, whose formation and evolution are still poorly known. The Sloan Digital Sky Survey provides, for the first time, a sample of 6 AM CVn stars (out of a total population of 18) that is sufficiently homogeneous that we can start to study the populati...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
1376398
0709.3079
2007-09-19
Computing a pyramid partition generating function with dimer shuffling
We verify a recent conjecture of Kenyon/Szendroi, arXiv:0705.3419, by computing the generating function for pyramid partitions. Pyramid partitions are closely related to Aztec Diamonds; their generating function turns out to be the partition function for the Donaldson--Thomas theory of a non-commutative resolution of t...
[ "math.CO", "math.AG" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
16332059
0709.3269
2007-09-20
Magnetic bion condensation: A new mechanism of confinement and mass gap in four dimensions
In recent work, we derived the long-distance confining dynamics of certain QCD-like gauge theories formulated on small $S^1 \times \R^3$ based on symmetries, an index theorem, and Abelian duality. Here, we give the microscopic derivation. The solution reveals a new mechanism of confinement in QCD(adj) in the regime whe...
[ "hep-th", "hep-lat", "hep-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
14356518
0709.3186
2007-09-20
A Semismooth Newton Method for Tikhonov Functionals with Sparsity Constraints
Minimization problems in $\ell^2$ for Tikhonov functionals with sparsity constraints are considered. Sparsity of the solution is ensured by a weighted $\ell^1$ penalty term. The necessary and sufficient condition for optimality is shown to be slantly differentiable (Newton differentiable), hence a semismooth Newton met...
[ "math.OC", "math.NA" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
5065716
0709.3165
2007-09-20
Level sets of the stochastic wave equation driven by a symmetric L\'{e}vy noise
We consider the solution $\{u(t,x);t\geq0,x\in\mathbf{R}\}$ of a system of $d$ linear stochastic wave equations driven by a $d$-dimensional symmetric space-time L\'{e}vy noise. We provide a necessary and sufficient condition on the characteristic exponent of the L\'{e}vy noise, which describes exactly when the zero set...
[ "math.PR" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "d khoshnevisan_1", "name": "Davar Khoshnevisan", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "e nualart_1", "name": "Eulalia Nualart", "publication_history": null, "h_index": null, "num_pape...
null
12682677
0709.3141
2007-09-20
Local and Global relations between the number of contacts and density in monodisperse sphere packs
The topological structure resulting from the network of contacts between grains (\emph{contact network}) is studied for large samples of monosized spheres with densities (fraction of volume occupied by the spheres) ranging from 0.59 to 0.64. We retrieve the coordinates of each bead in the pack and we calculate the aver...
[ "cond-mat.dis-nn", "cond-mat.soft" ]
null
[ "target.author.publication_history" ]
[ { "corpus_id": "27131901", "num_citations": null } ]
[ { "author_id": "t aste_1", "name": "Tomaso Aste", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "m saadatfar_1", "name": "Mohammad Saadatfar", "publication_history": null, "h_index": null, "num_papers": null,...
null
18717798
0709.3330
2007-09-21
Photometric Redshifts and Photometry Errors
We examine the impact of non-Gaussian photometry errors on photometric redshift performance. We find that they greatly increase the scatter, but this can be mitigated to some extent by incorporating the correct noise model into the photometric redshift estimation process. However, the remaining scatter is still equival...
[ "astro-ph" ]
null
[ "target.author.publication_history" ]
[ { "corpus_id": "15705968", "num_citations": null }, { "corpus_id": "17325551", "num_citations": null } ]
[ { "author_id": "d wittman_1", "name": "David Wittman", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "p riechers_1", "name": "Paul [\"M.\"] Riechers", "publication_history": null, "h_index": null, "num_papers...
null
8966941
0709.3535
2007-09-21
Maximum Likelihood Estimation in Latent Class Models For Contingency Table Data
Statistical models with latent structure have a history going back to the 1950s and have seen widespread use in the social sciences and, more recently, in computational biology and in machine learning. Here we study the basic latent class model proposed originally by the sociologist Paul F. Lazarfeld for categorical va...
[ "stat.ME", "math.ST", "stat.TH" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
541076
0709.3384
2007-09-21
Weighted Matching in the Semi-Streaming Model
We reduce the best known approximation ratio for finding a weighted matching of a graph using a one-pass semi-streaming algorithm from 5.828 to 5.585. The semi-streaming model forbids random access to the input and restricts the memory to O(n*polylog(n)) bits. It was introduced by Muthukrishnan in 2003 and is appropria...
[ "cs.DM", "cs.DS" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
14631163
0709.3461
2007-09-21
Fast Algorithm and Implementation of Dissimilarity Self-Organizing Maps
In many real world applications, data cannot be accurately represented by vectors. In those situations, one possible solution is to rely on dissimilarity measures that enable sensible comparison between observations. Kohonen's Self-Organizing Map (SOM) has been adapted to data described only through their dissimilarity...
[ "cs.NE", "cs.LG" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "b conan-guez_1", "name": "Brieuc Conan-Guez", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "f rossi_1", "name": "Fabrice Rossi", "publication_history": null, "h_index": null, "num_papers": nu...
null
102498494
0709.3462
2007-09-21
Can High Frequency Acoustic Waves Heat the Quiet Sun Chromosphere?
We use Hinode/SOT Ca II H-line and blue continuum broadband observations to study the presence and power of high frequency acoustic waves at high spatial resolution. We find that there is no dominant power at small spatial scales; the integrated power using the full resolution of Hinode (0.05'' pixels, 0.16'' resolutio...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
118486073
0709.3485
2007-09-21
The Australia Telescope 20 GHz (AT20G) Survey: The Bright Source Sample
The Australia Telescope 20 GHz (AT20G) Survey is a blind survey of the whole Southern sky at 20 GHz (with follow-up observations at 4.8 and 8.6 GHz) carried out with the Australia Telescope Compact Array (ATCA) from 2004 to 2007. The Bright Source Sample (BSS) is a complete flux-limited subsample of the AT20G Survey ca...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
14361273
0709.3512
2007-09-21
A Bayesian Approach to Network Modularity
We present an efficient, principled, and interpretable technique for inferring module assignments and for identifying the optimal number of modules in a given network. We show how several existing methods for finding modules can be described as variant, special, or limiting cases of our work, and how the method overcom...
[ "physics.data-an", "cond-mat.stat-mech", "stat.ML" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
115165111
0709.3360
2007-09-21
A non-monotone conservation law for dune morphodynamics
We investigate a non-local non linear conservation law, first introduced by A.C. Fowler to describe morphodynamics of dunes, see \cite{Fow01, Fow02}. A remarkable feature is the violation of the maximum principle, which allows for erosion phenomenon. We prove well-posedness for initial data in $L^2$ and give explicit c...
[ "math.AP" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
8036346
0709.3541
2007-09-21
Towards the Secrecy Capacity of the Gaussian MIMO Wire-tap Channel: The 2-2-1 Channel
We find the secrecy capacity of the 2-2-1 Gaussian MIMO wire-tap channel, which consists of a transmitter and a receiver with two antennas each, and an eavesdropper with a single antenna. We determine the secrecy capacity of this channel by proposing an achievable scheme and then developing a tight upper bound that mee...
[ "cs.IT", "math.IT" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[]
[ { "author_id": "s shafiee_1", "name": "Shabnam Shafiee", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "n liu_6", "name": "Nan Liu", "publication_history": null, "h_index": null, "num_papers": null, "num_...
null
8594504
0709.3587
2007-09-22
Self-organizing maps and symbolic data
In data analysis new forms of complex data have to be considered like for example (symbolic data, functional data, web data, trees, SQL query and multimedia data, ...). In this context classical data analysis for knowledge discovery based on calculating the center of gravity can not be used because input are not $\math...
[ "cs.NE", "cs.LG" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "a golli_1", "name": "Aïcha [\"El\"] Golli", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "b conan-guez_1", "name": "Brieuc Conan-Guez", "publication_history": null, "h_index": null, "num_pape...
null
18050216
0809.5063
2007-09-22
The Fibonacci scheme for fault-tolerant quantum computation
We rigorously analyze Knill's Fibonacci scheme for fault-tolerant quantum computation, which is based on the recursive preparation of Bell states protected by a concatenated error-detecting code. We prove lower bounds on the threshold fault rate of .67\times 10^{-3} for adversarial local stochastic noise, and 1.25\time...
[ "quant-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
119270645
0709.3563
2007-09-22
The extragalactic radio-source population at 95 GHz
We have used the Australia Telescope Compact Array (ATCA) at 95GHz to carry out continuum observations of 130 extragalactic radio sources selected from the Australia Telescope 20GHz (AT20G) survey. Over 90% of these sources are detected at 95 GHz, and we use a triple-correlation method to measure simultaneous 20 and 95...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
8654714
0709.3646
2007-09-23
A convenient category of locally preordered spaces
As a practical foundation for a homotopy theory of abstract spacetime, we extend a category of certain compact partially ordered spaces to a convenient category of locally preordered spaces. In particular, we show that our new category is Cartesian closed and that the forgetful functor to the category of compactly gene...
[ "math.AT" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
15218335
0709.3641
2007-09-23
Representation of Functional Data in Neural Networks
Functional Data Analysis (FDA) is an extension of traditional data analysis to functional data, for example spectra, temporal series, spatio-temporal images, gesture recognition data, etc. Functional data are rarely known in practice; usually a regular or irregular sampling is known. For this reason, some processing is...
[ "cs.NE" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "f rossi_1", "name": "Fabrice Rossi", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "n delannay_0", "name": "Nicolas Delannay", "publication_history": null, "h_index": null, "num_papers": null,...
null
6860327
0709.3880
2007-09-24
A New Perspective on Multi-user Power Control Games in Interference Channels
This paper considers the problem of how to allocate power among competing users sharing a frequency-selective interference channel. We model the interaction between selfish users as a non-cooperative game. As opposed to the existing iterative water-filling algorithm that studies the myopic users, this paper studies how...
[ "cs.GT" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[]
[ { "author_id": "y su_75", "name": "Yi Su", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "m schaar_1", "name": "Mihaela [\"van\",\"der\"] Schaar", "publication_history": null, "h_index": null, "num_papers": n...
null
119185983
0709.3519
2007-09-24
Designing Gapped Soft Functions for Jet Production
Distributions in jet production often depend on a soft function, S, which describes hadronic radiation between the jets. Near kinematic thresholds S encodes nonperturbative information, while far from thresholds S can be computed with an operator product expansion (OPE). We design soft functions for jets that serve thi...
[ "hep-ph", "hep-th", "nucl-th" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
117647756
0709.3680
2007-09-24
Inequalities that Collectively Completely Characterize the Catalytic Majorization Relation
For probability vectors x and y, the catalytic majorization relation x prec_T y is defined to hold when there exists a probability vector z such that x otimes z is majorized by y otimes z. In this paper, an infinite family of functions is given such that, subject to some trivial restrictions, x prec_T y if and only if ...
[ "quant-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
40859035
0709.3801
2007-09-24
Fluctuation theorem for entropy production during effusion of a relativistic ideal gas
The probability distribution of the entropy production for the effusion of a relativistic ideal gas is calculated explicitly. This result is then extended to include particle and anti-particle pair production and annihilation. In both cases, the fluctuation theorem is verified.
[ "cond-mat.stat-mech" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "b cleuren_1", "name": "Bart Cleuren", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "k willaert_0", "name": "Ken Willaert", "publication_history": null, "h_index": null, "num_papers": null, ...
null
3948898
0709.3827
2007-09-24
On Successive Refinement of Diversity for Fading ISI Channels
Rate and diversity impose a fundamental tradeoff in communications. This tradeoff was investigated for Intersymbol Interference (ISI) channels in [4]. A different point of view was explored in [1] where high-rate codes were designed so that they have a high-diversity code embedded within them. Such diversity embedded c...
[ "cs.IT", "math.IT" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "s dusad_1", "name": "Sanket Dusad", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "s diggavi_1", "name": "Suhas [\"N.\"] Diggavi", "publication_history": null, "h_index": null, "num_papers": n...
null
9832351
0709.3920
2007-09-25
Blind Minimax Estimation
We consider the linear regression problem of estimating an unknown, deterministic parameter vector based on measurements corrupted by colored Gaussian noise. We present and analyze blind minimax estimators (BMEs), which consist of a bounded parameter set minimax estimator, whose parameter set is itself estimated from m...
[ "math.ST", "stat.ME", "stat.TH" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
16595620
0709.3868
2007-09-25
Observations of the Crab Nebula and Pulsar with VERITAS
Observations of the Crab Nebula have proven to be the best tool to calibrate and to characterize the performance of a Cherenkov telescope. Scientifically, it is interesting to measure the energy spectrum of the Crab Nebula close to the inverse-Compton peak where a deviation is expected from the power law seen at energi...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
18640259
0709.4048
2007-09-25
A Symphony Conducted by Brunet
We introduce BruNet, a general P2P software framework which we use to produce the first implementation of Symphony, a 1-D Kleinberg small-world architecture. Our framework is designed to easily implement and measure different P2P protocols over different transport layers such as TCP or UDP. This paper discusses our imp...
[ "cs.DC", "cs.NI" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "p boykin_1", "name": "P. [\"Oscar\"] Boykin", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "j bridgewater_1", "name": "Jesse [\"S.\",\"A.\"] Bridgewater", "publication_history": null, "h_index": ...
null
17511583
0709.3906
2007-09-25
Fast stable direct fitting and smoothness selection for Generalized Additive Models
Existing computationally efficient methods for penalized likelihood GAM fitting employ iterative smoothness selection on working linear models (or working mixed models). Such schemes fail to converge for a non-negligible proportion of models, with failure being particularly frequent in the presence of concurvity. If sm...
[ "stat.ME", "stat.CO" ]
null
[ "target.author.publication_history.key_reference", "target.key_reference" ]
null
null
null
3199554
0709.3921
2007-09-25
Geographic Gossip: Efficient Averaging for Sensor Networks
Gossip algorithms for distributed computation are attractive due to their simplicity, distributed nature, and robustness in noisy and uncertain environments. However, using standard gossip algorithms can lead to a significant waste in energy by repeatedly recirculating redundant information. For realistic sensor networ...
[ "cs.IT", "cs.NI", "math.IT", "math.PR" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[]
[ { "author_id": "a dimakis_1", "name": "Alexandros [\"G.\"] Dimakis", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "a sarwate_1", "name": "Anand [\"D.\"] Sarwate", "publication_history": null, "h_index": null, ...
null
49527035
0709.3898
2007-09-25
Neutrinos from WIMP Annihilations Obtained Using a Full Three-Flavor Monte Carlo Approach
Weakly Interacting Massive Particles (WIMPs) are one of the main candidates for the dark matter in the Universe. If these particles make up the dark matter, then they can be captured by the Sun or the Earth, sink to the respective cores, annihilate, and produce neutrinos. Thus, these neutrinos can be a striking dark ma...
[ "hep-ph", "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
17290966
0709.3903
2007-09-25
Noncentral convergence of multiple integrals
Fix $\nu>0$, denote by $G(\nu/2)$ a Gamma random variable with parameter $\nu/2$ and let $n\geq2$ be a fixed even integer. Consider a sequence $\{F_k\}_{k\geq1}$ of square integrable random variables belonging to the $n$th Wiener chaos of a given Gaussian process and with variance converging to $2\nu$. As $k\to\infty$,...
[ "math.PR" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
15914186
0709.3984
2007-09-25
The 3.6-8.0 Micron Broadband Emission Spectrum of HD 209458b: Evidence for an Atmospheric Temperature Inversion
We estimate the strength of the bandpass-integrated thermal emission from the extrasolar planet HD 209458b at 3.6, 4.5, 5.8, and 8.0 microns using the Infrared Array Camera (IRAC) on the Spitzer Space Telescope. We observe a single secondary eclipse simultaneously in all four bandpasses and find relative eclipse depths...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
16754458
0709.4160
2007-09-26
Origin of the abundance patterns in Galactic globular clusters: constraints on dynamical and chemical properties of globular clusters
Aims. We analyse the effects of a first generation of fast rotating massive stars on the dynamical and chemical properties of globular clusters. Methods. We use stellar models of fast rotating massive stars, losing mass through a slow mechanical equatorial winds to produce material rich in H-burning products. We propos...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
580225
0709.4117
2007-09-26
Deciding Unambiguity and Sequentiality starting from a Finitely Ambiguous Max-Plus Automaton
Finite automata with weights in the max-plus semiring are considered. The main result is: it is decidable in an effective way whether a series that is recognized by a finitely ambiguous max-plus automaton is unambiguous, or is sequential. A collection of examples is given to illustrate the hierarchy of max-plus series ...
[ "cs.CC" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
15578326
0709.4174
2007-09-26
Angular Distributions of B -> K ll Decays
We model-independently analyze the angular distributions of B -> K ll decays, l = e, mu, for low dilepton mass using QCD factorization. Besides the decay rate, we study the forward-backward asymmetry A_FB^l and a further observable, F_H^l, which gives rise to a flat term in the angular distribution. We find that in the...
[ "hep-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
16472125
0709.4175
2007-09-26
Fast Fourier Transforms for the Rook Monoid
We define the notion of the Fourier transform for the rook monoid (also called the symmetric inverse semigroup) and provide two efficient divide-and-conquer algorithms (fast Fourier transforms, or FFTs) for computing it. This paper marks the first extension of group FFTs to non-group semigroups.
[ "math.RT", "math.NA" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[ { "corpus_id": "13283246", "num_citations": null } ]
[ { "author_id": "m malandro_1", "name": "Martin [\"E.\"] Malandro", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "d rockmore_1", "name": "Daniel [\"N.\"] Rockmore", "publication_history": null, "h_index": null, ...
null
31826130
0709.4125
2007-09-26
Work extremum principle: Structure and function of quantum heat engines
We consider a class of quantum heat engines consisting of two subsystems interacting via a unitary transformation and coupled to two separate baths at different temperatures $T_h > T_c$. The purpose of the engine is to extract work due to the temperature difference. Its dynamics is not restricted to the near equilibriu...
[ "cond-mat.stat-mech", "quant-ph" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "a allahverdyan_1", "name": "Armen [\"E.\"] Allahverdyan", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "r johal_1", "name": "Ramandeep [\"S.\"] Johal", "publication_history": null, "h_index": nul...
null
15536245
0709.4028
2007-09-26
D-branes and Normal Functions
We explain the B-model origin of extended Picard-Fuchs equations satisfied by the D-brane superpotential on compact Calabi-Yau threefolds. Via the Abel-Jacobi map, the domainwall tension is identified with a Poincare normal function--a transversal holomorphic section of the Griffiths intermediate Jacobian. Within this ...
[ "hep-th", "math.AG" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
13947520
astro-ph/0612512
2007-09-27
Determining the Type, Redshift, and Phase of a Supernova Spectrum
We present an algorithm to identify the types of supernova spectra, and determine their redshift and phase. This algorithm, based on the correlation techniques of Tonry & Davis, is implemented in the SuperNova IDentification code (SNID). It is used by members of the ESSENCE project to determine whether a noisy spectrum...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
6298873
0709.4294
2007-09-27
New constraints on dark energy from the observed growth of the most X-ray luminous galaxy clusters
We present constraints on the mean matter density, Omega_m, the normalization of the density fluctuation power spectrum, sigma_8, and the dark-energy equation-of-state parameter, w, obtained from measurements of the X-ray luminosity function of the largest known galaxy clusters at redshifts z<0.7, as compiled in the Ma...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
9814037
0709.4477
2007-09-27
Sneutrino cold dark matter, a new analysis: relic abundance and detection rates
We perform a new and updated analysis of sneutrinos as dark matter candidates, in different classes of supersymmetric models. We extend previous analyses by studying sneutrino phenomenology for full variations of the supersymmetric parameters which define the various models. We first revisit the standard Minimal Supers...
[ "hep-ph", "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
15224013
0709.4387
2007-09-27
Graph-different permutations
We strengthen and put in a broader perspective previous results of the first two authors on colliding permutations. The key to the present approach is a new non-asymptotic invariant for graphs.
[ "math.CO" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
9770493
0709.4513
2007-09-27
Scheduling and Pre-Conditioning in Multi-User MIMO TDD Systems
The downlink transmission in multi-user multiple-input multiple-output (MIMO) systems has been extensively studied from both communication-theoretic and information-theoretic perspectives. Most of these papers assume perfect/imperfect channel knowledge. In general, the problem of channel training and estimation is stud...
[ "cs.IT", "math.IT" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "j jose_2", "name": "Jubin Jose", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "a ashikhmin_1", "name": "Alexei [\"E.\"] Ashikhmin", "publication_history": null, "h_index": null, "num_papers":...
null
3827567
0709.4446
2007-09-27
Supersymmetric Gauge Theories, Intersecting Branes and Free Fermions
We show that various holomorphic quantities in supersymmetric gauge theories can be conveniently computed by configurations of D4-branes and D6-branes. These D-branes intersect along a Riemann surface that is described by a holomorphic curve in a complex surface. The resulting I-brane carries two-dimensional chiral fer...
[ "hep-th" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
19968041
0709.4500
2007-09-27
Community structure in directed networks
We consider the problem of finding communities or modules in directed networks. The most common approach to this problem in the previous literature has been simply to ignore edge direction and apply methods developed for community discovery in undirected networks, but this approach discards potentially useful informati...
[ "physics.data-an", "physics.soc-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
433528
0709.4584
2007-09-28
New constraints on the Mid-IR EBL from the HESS discovery of VHE gamma rays from 1ES 0229+200
AIMS: To investigate the very high energy (VHE: >100 GeV) gamma-ray emission from the high-frequency peaked BL Lac 1ES 0229+200. METHODS: Observations of 1ES 0229+200 at energies above 580 GeV were performed with the High Energy Stereoscopic System (HESS) in 2005 and 2006. RESULTS: 1ES 0229+200 is discovered by HESS to...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
38655993
0709.4596
2007-09-28
Ground state fidelity from tensor network representations
For any D-dimensional quantum lattice system, the fidelity between two ground state many-body wave functions is mapped onto the partition function of a D-dimensional classical statistical vertex lattice model with the same lattice geometry. The fidelity per lattice site, analogous to the free energy per site, is well-d...
[ "cond-mat.stat-mech", "cond-mat.str-el" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "h zhou_116", "name": "Huan-Qiang Zhou", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "r orús_1", "name": "Román Orús", "publication_history": null, "h_index": null, "num_papers": null, "n...
null
15162958
0709.4671
2007-09-28
Secrecy Capacity Region of a Multi-Antenna Gaussian Broadcast Channel with Confidential Messages
In wireless data networks, communication is particularly susceptible to eavesdropping due to its broadcast nature. Security and privacy systems have become critical for wireless providers and enterprise networks. This paper considers the problem of secret communication over the Gaussian broadcast channel, where a multi...
[ "cs.IT", "math.IT" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
8103963
0709.4669
2007-09-28
The Extended Edit Distance Metric
Similarity search is an important problem in information retrieval. This similarity is based on a distance. Symbolic representation of time series has attracted many researchers recently, since it reduces the dimensionality of these high dimensional data objects. We propose a new distance metric that is applied to symb...
[ "cs.IR" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "m fuad_2", "name": "Muhammad [\"Marwan\",\"Muhammad\"] Fuad", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "p marteau_1", "name": "Pierre-François Marteau", "publication_history": null, "h_index"...
null
3138311
0710.0095
2007-09-29
Quantum communication complexity of block-composed functions
A major open problem in communication complexity is whether or not quantum protocols can be exponentially more efficient than classical protocols on _total_ Boolean functions in the two-party interactive model. The answer appears to be ``No''. In 2002, Razborov proved this conjecture for so far the most general class o...
[ "quant-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
5786546
0710.0116
2007-09-30
Distributed MIMO receiver - Achievable rates and upper bounds
In this paper we investigate the achievable rate of a system that includes a nomadic transmitter with several antennas, which is received by multiple agents, exhibiting independent channel gains and additive circular-symmetric complex Gaussian noise. In the nomadic regime, we assume that the agents do not have any deco...
[ "cs.IT", "math.IT" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[]
[ { "author_id": "a sanderovich_1", "name": "Amichai Sanderovich", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "s shamai_1", "name": "Shlomo Shamai", "publication_history": null, "h_index": null, "num_papers"...
null
11794247
0710.0279
2007-10-01
Zariski $k$-plets via dessins d'enfants
We construct exponentially large collections of pairwise distinct equisingular deformation families of irreducible plane curves sharing the same sets of singularities. The fundamental groups of all curves constructed are abelian.
[ "math.AG" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
9538877
0710.0262
2007-10-01
Incomplete Lineage Sorting: Consistent Phylogeny Estimation From Multiple Loci
We introduce a simple algorithm for reconstructing phylogenies from multiple gene trees in the presence of incomplete lineage sorting, that is, when the topology of the gene trees may differ from that of the species tree. We show that our technique is statistically consistent under standard stochastic assumptions, that...
[ "q-bio.PE", "cs.CE", "cs.DS", "math.PR", "math.ST", "stat.TH" ]
null
[ "target.author.publication_history" ]
[ { "corpus_id": "7980571", "num_citations": null } ]
[ { "author_id": "e mossel_1", "name": "Elchanan Mossel", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "s roch_1", "name": "Sébastien Roch", "publication_history": null, "h_index": null, "num_papers": null, ...
null
17460860
0710.0406
2007-10-01
A Population of Massive and Evolved Galaxies at z$\ga$5
We report results from a search for massive and evolved galaxies at z>5 in the GOODS southern field. Combining HST ACS, VLT ISAAC and Spitzer IRAC photometric data, we develop a color selection technique to identify candidates for being evolved galaxies at high redshifts. The color selection is primarily based on locat...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
8272042
0710.0185
2007-10-01
Highly Efficient Modeling of Dynamic Coronal Loops
Observational and theoretical evidence suggests that coronal heating is impulsive and occurs on very small cross-field spatial scales. A single coronal loop could contain a hundred or more individual strands that are heated quasi-independently by nanoflares. It is therefore an enormous undertaking to model an entire ac...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
118360445
0710.0285
2007-10-01
Quantum-limited metrology with product states
We study the performance of initial product states of n-body systems in generalized quantum metrology protocols that involve estimating an unknown coupling constant in a nonlinear k-body (k << n) Hamiltonian. We obtain the theoretical lower bound on the uncertainty in the estimate of the parameter. For arbitrary initia...
[ "quant-ph", "cond-mat.other" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "s boixo_1", "name": "Sergio Boixo", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "a datta_5", "name": "Animesh Datta", "publication_history": null, "h_index": null, "num_papers": null, "n...
null
118544579
0710.0315
2007-10-01
Conservation laws and scattering for de Sitter classical particles
Starting from an intrinsic geometric characterization of de Sitter timelike and lightlike geodesics we give a new description of the conserved quantities associated with classical free particles on the de Sitter manifold. These quantities allow for a natural discussion of classical pointlike scattering and decay proces...
[ "hep-th" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
15076720
0710.0470
2007-10-02
A minimal set of generators for the ring of multisymmetric functions
The purpose of this article is to give, for any commutative ring A, an explicit minimal set of generators for the ring of multisymmetric functions TS^d_A(A[x_1,...,x_r]) as an A-algebra. In characteristic zero, i.e. when A is an algebra over the rational numbers, a minimal set of generators has been known since the 19t...
[ "math.AC", "math.AG" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
488882
0710.0485
2007-10-02
Prediction with expert advice for the Brier game
We show that the Brier game of prediction is mixable and find the optimal learning rate and substitution function for it. The resulting prediction algorithm is applied to predict results of football and tennis matches. The theoretical performance guarantee turns out to be rather tight on these data sets, especially in ...
[ "cs.LG" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
17777139
0710.0550
2007-10-02
Community Detection in Complex Networks by Dynamical Simplex Evolution
We benchmark the dynamical simplex evolution (DSE) method with several of the currently available algorithms to detect communities in complex networks by comparing the fraction of correctly identified nodes for different levels of ``fuzziness'' of random networks composed of well defined communities. The potential bene...
[ "cond-mat.dis-nn", "cs.NI", "physics.soc-ph" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "v gudkov_1", "name": "Vladimir Gudkov", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "v montealegre_0", "name": "V. Montealegre", "publication_history": null, "h_index": null, "num_papers": n...
null
2449786
0710.0655
2007-10-02
Unique Games with Entangled Provers are Easy
We consider one-round games between a classical verifier and two provers who share entanglement. We show that when the constraints enforced by the verifier are `unique' constraints (i.e., permutations), the value of the game can be well approximated by a semidefinite program. Essentially the only algorithm known previo...
[ "quant-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
11440685
0710.0658
2007-10-02
Detailed Network Measurements Using Sparse Graph Counters: The Theory
Measuring network flow sizes is important for tasks like accounting/billing, network forensics and security. Per-flow accounting is considered hard because it requires that many counters be updated at a very high speed; however, the large fast memories needed for storing the counters are prohibitively expensive. Theref...
[ "cs.NI", "cs.IT", "math.IT" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
7190205
0710.0497
2007-10-02
A Joint Search for Gravitational Wave Bursts with AURIGA and LIGO
The first simultaneous operation of the AURIGA detector and the LIGO observatory was an opportunity to explore real data, joint analysis methods between two very different types of gravitational wave detectors: resonant bars and interferometers. This paper describes a coincident gravitational wave burst search, where d...
[ "gr-qc" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "l baggio_1", "name": "Lucio Baggio", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "m bignotto_1", "name": "Michele Bignotto", "publication_history": null, "h_index": null, "num_papers": null,...
null
14152740
0710.0460
2007-10-02
Convergence of simple random walks on random discrete trees to Brownian motion on the continuum random tree
In this article it is shown that the Brownian motion on the continuum random tree is the scaling limit of the simple random walks on any family of discrete $n$-vertex ordered graph trees whose search-depth functions converge to the Brownian excursion as $n\to\infty$. We prove both a quenched version (for typical realis...
[ "math.PR" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
17738858
0710.0837
2007-10-03
Production of Millisecond Dips in Sco X-1 Count Rates by Dead Time Effects
Chang et al. (2006) reported millisecond duration dips in the X-ray intensity of Sco X-1 and attributed them to occultations of the source by small trans-Neptunian objects (TNOs). We have found multiple lines of evidence that these dips are not astronomical in origin, but rather the result of high-energy charged partic...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
6761308
0710.0789
2007-10-03
Wireless Local Area Networks with Multiple-Packet Reception Capability
Thanks to its simplicity and cost efficiency, wireless local area network (WLAN) enjoys unique advantages in providing high-speed and low-cost wireless services in hot spots and indoor environments. Traditional WLAN medium-access-control (MAC) protocols assume that only one station can transmit at a time: simultaneous ...
[ "cs.PF", "cs.NI" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "y zhang_523", "name": "Ying [\"Jun\",\"Angela\"] Zhang", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "p zheng_2", "name": "Peng [\"Xuan\"] Zheng", "publication_history": null, "h_index": null, ...
null
119297495
0710.0793
2007-10-03
Origin of the Verwey transition in magnetite: Group theory, electronic structure, and lattice dynamics study
The Verwey phase transition in magnetite has been analyzed using the group theory methods. It is found that two order parameters with the symmetries $X_3$ and $\Delta_5$ induce the structural transformation from the high-temperature cubic to the low-temperature monoclinic phase. The coupling between the order parameter...
[ "cond-mat.str-el" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
17245245
0710.0675
2007-10-03
Finding pulsars with LOFAR
We investigate the number and type of pulsars that will be discovered with the low-frequency radio telescope LOFAR. We consider different search strategies for the Galaxy, for globular clusters and for galaxies other than our own. We show an all-sky Galactic survey can be optimally carried out by incoherently combining...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null