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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8676387 | 0909.0206 | 2009-09-01 | Geometry of the Welch Bounds | A geometric perspective involving Grammian and frame operators is used to derive the entire family of Welch bounds. This perspective unifies a number of observations that have been made regarding tightness of the bounds and their connections to symmetric k-tensors, tight frames, homogeneous polynomials, and t-designs. ... | [
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9491278 | 0909.0359 | 2009-09-02 | Fixed-domain asymptotic properties of tapered maximum likelihood estimators | When the spatial sample size is extremely large, which occurs in many environmental and ecological studies, operations on the large covariance matrix are a numerical challenge. Covariance tapering is a technique to alleviate the numerical challenges. Under the assumption that data are collected along a line in a bounde... | [
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10357023 | 0909.0368 | 2009-09-02 | An Iterative Method for Parallel MRI SENSE-based Reconstruction in the Wavelet Domain | To reduce scanning time and/or improve spatial/temporal resolution in some MRI applications, parallel MRI (pMRI) acquisition techniques with multiple coils acquisition have emerged since the early 1990s as powerful 3D imaging methods that allow faster acquisition of reduced Field of View (FOV) images. In these techniqu... | [
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18702334 | 0909.0408 | 2009-09-02 | The semigroup structure of Gaussian channels | We investigate the semigroup structure of bosonic Gaussian quantum channels. Particular focus lies on the sets of channels which are divisible, idempotent or Markovian (in the sense of either belonging to one-parameter semigroups or being infinitesimal divisible). We show that the non-compactness of the set of Gaussian... | [
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17674452 | 0909.0530 | 2009-09-02 | Localised edge states nucleate turbulence in extended plane Couette cells | We study the turbulence transition of plane Couette flow in large domains where localised perturbations are observed to generate growing turbulent spots. Extending previous studies on the boundary between laminar and turbulent dynamics we determine invariant structures intermediate between laminar and turbulent flow. I... | [
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10052830 | 0909.0513 | 2009-09-02 | Computational Eulerian Hydrodynamics and Galilean Invariance | Eulerian hydrodynamical simulations are a powerful and popular tool for modeling fluids in astrophysical systems. In this work, we critically examine recent claims that these methods violate Galilean invariance of the Euler equations. We demonstrate that Eulerian hydrodynamics methods do converge to a Galilean-invarian... | [
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119292788 | 0909.0524 | 2009-09-02 | Particle production in matter at extreme conditions | We study particle production and its density evolution and equilibration in hot dense medium. One type of hot dense medium, which we study, is hadronic gas produced at quark gluon plasma hadronization in heavy ions collisions in SPS, RHIC and LHC experiments. We study hadron production at non-equilibrium quark gluon pl... | [
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14800513 | 0909.0275 | 2009-09-02 | Seeing the Collision of a Supernova with its Companion Star | The progenitors of Type Ia and some core collapse supernovae are thought to be stars in binary systems, but little observational evidence exists to confirm the hypothesis. We suggest that the collision of the supernova ejecta with its companion star should produce detectable emission in the hours and days following the... | [
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9319285 | 0909.0411 | 2009-09-02 | The composite absolute penalties family for grouped and hierarchical variable selection | Extracting useful information from high-dimensional data is an important focus of today's statistical research and practice. Penalized loss function minimization has been shown to be effective for this task both theoretically and empirically. With the virtues of both regularization and sparsity, the $L_1$-penalized squ... | [
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11222143 | 0909.0392 | 2009-09-02 | On the Calibration of a Size-Structured Population Model from Experimental Data | The aim of this work is twofold. First, we survey the techniques developed in (Perthame, Zubelli, 2007) and (Doumic, Perthame, Zubelli, 2008) to reconstruct the division (birth) rate from the cell volume distribution data in certain structured population models. Secondly, we implement such techniques on experimental ce... | [
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14859790 | 0909.0608 | 2009-09-03 | Building and using semiparametric tolerance regions for parametric multinomial models | We introduce a semiparametric ``tubular neighborhood'' of a parametric model in the multinomial setting. It consists of all multinomial distributions lying in a distance-based neighborhood of the parametric model of interest. Fitting such a tubular model allows one to use a parametric model while treating it as an appr... | [
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2714197 | 0909.0763 | 2009-09-03 | The Asymptotic Behavior of Minimum Buffer Size Requirements in Large P2P Streaming Networks | The growth of real-time content streaming over the Internet has resulted in the use of peer-to-peer (P2P) approaches for scalable content delivery. In such P2P streaming systems, each peer maintains a playout buffer of content chunks which it attempts to fill by contacting other peers in the network. The objective is t... | [
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6606315 | 0909.0682 | 2009-09-03 | On Planning with Preferences in HTN | In this paper, we address the problem of generating preferred plans by combining the procedural control knowledge specified by Hierarchical Task Networks (HTNs) with rich qualitative user preferences. The outcome of our work is a language for specifyin user preferences, tailored to HTN planning, together with a provabl... | [
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14324937 | 0909.0708 | 2009-09-03 | grmonty: a Monte Carlo Code for Relativistic Radiative Transport | We describe a Monte Carlo radiative transport code intended for calculating spectra of hot, optically thin plasmas in full general relativity. The version we describe here is designed to model hot accretion flows in the Kerr metric and therefore incorporates synchrotron emission and absorption, and Compton scattering. ... | [
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263790024 | 0909.0801 | 2009-09-03 | A Monte Carlo AIXI Approximation | This paper introduces a principled approach for the design of a scalable general reinforcement learning agent. Our approach is based on a direct approximation of AIXI, a Bayesian optimality notion for general reinforcement learning agents. Previously, it has been unclear whether the theory of AIXI could motivate the de... | [
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2072909 | 0909.0704 | 2009-09-03 | Concentric Permutation Source Codes | Permutation codes are a class of structured vector quantizers with a computationally-simple encoding procedure based on sorting the scalar components. Using a codebook comprising several permutation codes as subcodes preserves the simplicity of encoding while increasing the number of rate-distortion operating points, i... | [
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17294877 | 0909.0753 | 2009-09-03 | Atomic Dark Matter | We propose that dark matter is dominantly comprised of atomic bound states. We build a simple model and map the parameter space that results in the early universe formation of hydrogen-like dark atoms. We find that atomic dark matter has interesting implications for cosmology as well as direct detection: Protohalo form... | [
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731486 | 0909.0777 | 2009-09-04 | Optimally Tuned Iterative Reconstruction Algorithms for Compressed Sensing | We conducted an extensive computational experiment, lasting multiple CPU-years, to optimally select parameters for two important classes of algorithms for finding sparse solutions of underdetermined systems of linear equations. We make the optimally tuned implementations available at {\tt sparselab.stanford.edu}; they ... | [
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14361011 | 0909.0856 | 2009-09-04 | Optimal scaling of the random walk Metropolis on elliptically symmetric unimodal targets | Scaling of proposals for Metropolis algorithms is an important practical problem in MCMC implementation. Criteria for scaling based on empirical acceptance rates of algorithms have been found to work consistently well across a broad range of problems. Essentially, proposal jump sizes are increased when acceptance rates... | [
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17921922 | 0909.0948 | 2009-09-04 | The chemical composition of the Sun | The solar chemical composition is an important ingredient in our understanding of the formation, structure and evolution of both the Sun and our solar system. Furthermore, it is an essential reference standard against which the elemental contents of other astronomical objects are compared. In this review we evaluate th... | [
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2101069 | 0909.0844 | 2009-09-04 | High-Dimensional Non-Linear Variable Selection through Hierarchical Kernel Learning | We consider the problem of high-dimensional non-linear variable selection for supervised learning. Our approach is based on performing linear selection among exponentially many appropriately defined positive definite kernels that characterize non-linear interactions between the original variables. To select efficiently... | [
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15292061 | 0909.0890 | 2009-09-04 | Time functions as utilities | Every time function on spacetime gives a (continuous) total preordering of the spacetime events which respects the notion of causal precedence. The problem of the existence of a (semi-)time function on spacetime and the problem of recovering the causal structure starting from the set of time functions are studied. It i... | [
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2967282 | 0909.0892 | 2009-09-04 | Price of Anarchy for Greedy Auctions | We consider auctions in which greedy algorithms, paired with first-price or critical-price payment rules, are used to resolve multi-parameter combinatorial allocation problems. We study the price of anarchy for social welfare in such auctions. We show for a variety of equilibrium concepts, including Bayes-Nash equilibr... | [
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508084 | 0909.0843 | 2009-09-04 | Discrete chain graph models | The statistical literature discusses different types of Markov properties for chain graphs that lead to four possible classes of chain graph Markov models. The different models are rather well understood when the observations are continuous and multivariate normal, and it is also known that one model class, referred to... | [
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1120511 | 0909.1062 | 2009-09-05 | New Approximation Algorithms for Minimum Enclosing Convex Shapes | Given $n$ points in a $d$ dimensional Euclidean space, the Minimum Enclosing Ball (MEB) problem is to find the ball with the smallest radius which contains all $n$ points. We give a $O(nd\Qcal/\sqrt{\epsilon})$ approximation algorithm for producing an enclosing ball whose radius is at most $\epsilon$ away from the opti... | [
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1147968 | 0909.1011 | 2009-09-05 | Bits About the Channel: Multi-round Protocols for Two-way Fading Channels | Most communication systems use some form of feedback, often related to channel state information. In this paper, we study diversity multiplexing tradeoff for both FDD and TDD systems, when both receiver and transmitter knowledge about the channel is noisy and potentially mismatched. For FDD systems, we first extend the... | [
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13945389 | 0909.0998 | 2009-09-05 | Probabilistic Representation and Approximation for Coupled Systems of Variational Inequalities | Our study is dedicated to the probabilistic representation and numerical approximation of solutions to coupled systems of variational inequalities. The dynamics of each component of the solution is driven by a different linear parabolic operator and suffers a non-linear dependence in all the components of the solution.... | [
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6386221 | 0909.1021 | 2009-09-05 | A multiagent urban traffic simulation Part I: dealing with the ordinary | We describe in this article a multiagent urban traffic simulation, as we believe individual-based modeling is necessary to encompass the complex influence the actions of an individual vehicle can have on the overall flow of vehicles. We first describe how we build a graph description of the network from purely geometri... | [
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119227497 | 0909.0950 | 2009-09-07 | The Uncertainty Principle in the Presence of Quantum Memory | The uncertainty principle, originally formulated by Heisenberg, dramatically illustrates the difference between classical and quantum mechanics. The principle bounds the uncertainties about the outcomes of two incompatible measurements, such as position and momentum, on a particle. It implies that one cannot predict th... | [
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1450197 | 0909.1440 | 2009-09-08 | Structured Sparse Principal Component Analysis | We present an extension of sparse PCA, or sparse dictionary learning, where the sparsity patterns of all dictionary elements are structured and constrained to belong to a prespecified set of shapes. This \emph{structured sparse PCA} is based on a structured regularization recently introduced by [1]. While classical spa... | [
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119184676 | 0909.1562 | 2009-09-08 | Millisecond Pulsar Ages: Implications of Binary Evolution and a Maximum Spin Limit | In the absence of constraints from the binary companion or supernova remnant, the standard method for estimating pulsar ages is to infer an age from the rate of spin-down. While the generic spin-down age may give realistic estimates for normal pulsars, it can fail for pulsars with very short periods. Details of the spi... | [
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14818658 | 0909.1605 | 2009-09-08 | Kernel Spectral Curvature Clustering (KSCC) | Multi-manifold modeling is increasingly used in segmentation and data representation tasks in computer vision and related fields. While the general problem, modeling data by mixtures of manifolds, is very challenging, several approaches exist for modeling data by mixtures of affine subspaces (which is often referred to... | [
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2658353 | 0909.1585 | 2009-09-08 | The Expanded Very Large Array | In almost 30 years of operation, the Very Large Array (VLA) has proved to be a remarkably flexible and productive radio telescope. However, the basic capabilities of the VLA have changed little since it was designed. A major expansion utilizing modern technology is currently underway to improve the capabilities of the ... | [
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119224164 | 0909.1324 | 2009-09-08 | The Real Topological Vertex at Work | We develop the real vertex formalism for the computation of the topological string partition function with D-branes and O-planes at the fixed point locus of an anti-holomorphic involution acting non-trivially on the toric diagram of any local toric Calabi-Yau manifold. Our results cover in particular the real vertex wi... | [
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7894269 | 0909.1373 | 2009-09-08 | Tree-guided group lasso for multi-response regression with structured sparsity, with an application to eQTL mapping | We consider the problem of estimating a sparse multi-response regression function, with an application to expression quantitative trait locus (eQTL) mapping, where the goal is to discover genetic variations that influence gene-expression levels. In particular, we investigate a shrinkage technique capable of capturing a... | [
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16297225 | 0909.1608 | 2009-09-08 | Motion Segmentation by SCC on the Hopkins 155 Database | We apply the Spectral Curvature Clustering (SCC) algorithm to a benchmark database of 155 motion sequences, and show that it outperforms all other state-of-the-art methods. The average misclassification rate by SCC is 1.41% for sequences having two motions and 4.85% for three motions. | [
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929 | 0909.1645 | 2009-09-09 | Qualitative Analysis of Partially-observable Markov Decision Processes | We study observation-based strategies for partially-observable Markov decision processes (POMDPs) with omega-regular objectives. An observation-based strategy relies on partial information about the history of a play, namely, on the past sequence of observations. We consider the qualitative analysis problem: given a PO... | [
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3645 | 0909.1783 | 2009-09-09 | The Case for a Structured Approach to Managing Unstructured Data | The challenge of managing unstructured data represents perhaps the largest data management opportunity for our community since managing relational data. And yet we are risking letting this opportunity go by, ceding the playing field to other players, ranging from communities such as AI, KDD, IR, Web, and Semantic Web, ... | [
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37736985 | 0909.1845 | 2009-09-09 | A Superglass Phase of Interacting Bosons | We introduce a Bose-Hubbard Hamiltonian with random disordered interactions as a model to study the interplay of superfluidity and glassiness in a system of three-dimensional hard-core bosons at half-filling. Solving the model using large-scale quantum Monte Carlo simulations, we show that these disordered interactions... | [
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12145246 | 0909.1765 | 2009-09-09 | Qunits: queried units in database search | Keyword search against structured databases has become a popular topic of investigation, since many users find structured queries too hard to express, and enjoy the freedom of a ``Google-like'' query box into which search terms can be entered. Attempts to address this problem face a fundamental dilemma. Database queryi... | [
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35347715 | 0909.1788 | 2009-09-09 | Building on Quicksand | Reliable systems have always been built out of unreliable components. Early on, the reliable components were small such as mirrored disks or ECC (Error Correcting Codes) in core memory. These systems were designed such that failures of these small components were transparent to the application. Later, the size of the u... | [
"cs.DC"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
7864844 | 0909.1769 | 2009-09-09 | Interactive Data Integration through Smart Copy & Paste | In many scenarios, such as emergency response or ad hoc collaboration, it is critical to reduce the overhead in integrating data. Ideally, one could perform the entire process interactively under one unified interface: defining extractors and wrappers for sources, creating a mediated schema, and adding schema mappings ... | [
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"name": "Craig [\"A.\"] Knoblock",
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263040490 | 0909.1599 | 2009-09-09 | Frame Permutation Quantization | Frame permutation quantization (FPQ) is a new vector quantization technique using finite frames. In FPQ, a vector is encoded using a permutation source code to quantize its frame expansion. This means that the encoding is a partial ordering of the frame expansion coefficients. Compared to ordinary permutation source co... | [
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{
"author_id": "h nguyen_89",
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9334063 | 0909.1779 | 2009-09-09 | The Case for RodentStore, an Adaptive, Declarative Storage System | Recent excitement in the database community surrounding new applications?analytic, scientific, graph, geospatial, etc.?has led to an explosion in research on database storage systems. New storage systems are vital to the database community, as they are at the heart of making database systems perform well in new applica... | [
"cs.DB"
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{
"author_id": "p cudré-mauroux_1",
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7596623 | 0909.1768 | 2009-09-09 | Unbundling Transaction Services in the Cloud | The traditional architecture for a DBMS engine has the recovery, concurrency control and access method code tightly bound together in a storage engine for records. We propose a different approach, where the storage engine is factored into two layers (each of which might have multiple heterogeneous instances). A Transac... | [
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15528901 | 0909.1717 | 2009-09-09 | Observation of charge-dependent azimuthal correlations and possible local strong parity violation in heavy ion collisions | Parity-odd domains, corresponding to non-trivial topological solutions of the QCD vacuum, might be created during relativistic heavy-ion collisions. These domains are predicted to lead to charge separation of quarks along the orbital momentum of the system created in non-central collisions. To study this effect, we inv... | [
"nucl-ex",
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] | null | [
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13893227 | 0909.1647 | 2009-09-09 | Probabilistic Weighted Automata | Nondeterministic weighted automata are finite automata with numerical weights on transitions. They define quantitative languages L that assign to each word w a real number L(w). The value of an infinite word w is computed as the maximal value of all runs over w, and the value of a run as the maximum, limsup, liminf, li... | [
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118645129 | 0909.1596 | 2009-09-09 | Stabilizing Open Quantum Systems by Markovian Reservoir Engineering | We study open quantum systems whose evolution is governed by a master equation of Kossakowski-Gorini-Sudarshan-Lindblad type and give a characterization of the convex set of steady states of such systems based on the generalized Bloch representation. It is shown that an isolated steady state of the Bloch equation canno... | [
"quant-ph"
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2543192 | 0909.1863 | 2009-09-10 | A Bernstein-type inequality for suprema of random processes with applications to model selection in non-Gaussian regression | Let $\pa{X_{t}}_{t\in T}$ be a family of real-valued centered random variables indexed by a countable set $T$. In the first part of this paper, we establish exponential bounds for the deviation probabilities of the supremum $Z=\sup_{t\in T}X_{t}$ by using the generic chaining device introduced in Talagrand (2005). Comp... | [
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6467796 | 0909.1933 | 2009-09-10 | Chromatic PAC-Bayes Bounds for Non-IID Data: Applications to Ranking and Stationary $\beta$-Mixing Processes | Pac-Bayes bounds are among the most accurate generalization bounds for classifiers learned from independently and identically distributed (IID) data, and it is particularly so for margin classifiers: there have been recent contributions showing how practical these bounds can be either to perform model selection (Ambrol... | [
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118593273 | 0909.1972 | 2009-09-10 | Hydrodynamic Limit for the Spin Dynamics of the Heisenberg Chain | We show that Quantum-Monte-Carlo calculations of the dynamic structure factor of the isotropic spin-1/2 antiferromagnetic chain at intermediate temperatures corroborate a picture of diffusive spin dynamics at finite frequencies in the low-energy long wave-length limit and are in good agreement with recent predictions f... | [
"cond-mat.str-el"
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{
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15070550 | 0909.2030 | 2009-09-10 | Size Bounds for Conjunctive Queries with General Functional Dependencies | This paper extends the work of Gottlob, Lee, and Valiant (PODS 2009)[GLV], and considers worst-case bounds for the size of the result Q(D) of a conjunctive query Q to a database D given an arbitrary set of functional dependencies. The bounds in [GLV] are based on a "coloring" of the query variables. In order to extend ... | [
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{
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... | null |
1760530 | 0909.2058 | 2009-09-10 | SocialScope: Enabling Information Discovery on Social Content Sites | Recently, many content sites have started encouraging their users to engage in social activities such as adding buddies on Yahoo! Travel and sharing articles with their friends on New York Times. This has led to the emergence of {\em social content sites}, which is being facilitated by initiatives like OpenID (http://w... | [
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1539622 | 0909.1884 | 2009-09-10 | Data-driven calibration of linear estimators with minimal penalties | This paper tackles the problem of selecting among several linear estimators in non-parametric regression; this includes model selection for linear regression, the choice of a regularization parameter in kernel ridge regression, spline smoothing or locally weighted regression, and the choice of a kernel in multiple kern... | [
"math.ST",
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30905753 | 0909.2100 | 2009-09-11 | Science and Adaptive Optics Requirements of MICADO, the E-ELT adaptive optics imaging camera | MICADO is the adaptive optics imaging camera being studied for the E-ELT. Its design has been optimised for use with MCAO, but will have its own SCAO module for the initial operational phase; and in principle could also be used with GLAO or LTAO. In this contribution, we outline a few of the science drivers for MICADO ... | [
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{
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3010426 | 0909.2126 | 2009-09-11 | Approximation of Bayesian Inverse Problems for PDEs | Inverse problems are often ill-posed, with solutions that depend sensitively on data. In any numerical approach to the solution of such problems, regularization of some form is needed to counteract the resulting instability. This paper is based on an approach to regularization, employing a Bayesian formulation of the p... | [
"math.NA",
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] | null | [
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16990840 | 0909.2152 | 2009-09-11 | Characterization of a Nd-loaded organic liquid scintillator for neutrinoless double beta decay search of 150-Nd with a 10-ton scale detector | Several liters of an organic liquid scintillator (LS) loaded with Nd have been made. We report on performances of this scintillator in terms of optical properties, radiopurity and light yield for a Nd concentration of 6.5 g/l. A possible application to search for the 150Nd neutrinoless double beta decay with a 10-ton s... | [
"physics.ins-det"
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{
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261971051 | 0909.2228 | 2009-09-11 | Image Reconstruction in Optical Interferometry | This tutorial paper describes the problem of image reconstruction from interferometric data with a particular focus on the specific problems encountered at optical (visible/IR) wavelengths. The challenging issues in image reconstruction from interferometric data are introduced in the general framework of inverse proble... | [
"astro-ph.IM"
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{
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"author_id": "j giovannelli_1",
"name": "Jean-François Giovannelli",
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11652182 | 0909.2234 | 2009-09-11 | Universal and Composite Hypothesis Testing via Mismatched Divergence | For the universal hypothesis testing problem, where the goal is to decide between the known null hypothesis distribution and some other unknown distribution, Hoeffding proposed a universal test in the nineteen sixties. Hoeffding's universal test statistic can be written in terms of Kullback-Leibler (K-L) divergence bet... | [
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{
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{
"author_id": "d huang_73",
"name": "Dayu Huang",
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191251 | 0909.2139 | 2009-09-11 | On the Viterbi process with continuous state space | This paper deals with convergence of the maximum a posterior probability path estimator in hidden Markov models. We show that when the state space of the hidden process is continuous, the optimal path may stabilize in a way which is essentially different from the previously considered finite-state setting. | [
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{
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15054143 | 0909.2194 | 2009-09-11 | Approximate Nearest Neighbor Search through Comparisons | This paper addresses the problem of finding the nearest neighbor (or one of the R-nearest neighbors) of a query object q in a database of n objects. In contrast with most existing approaches, we can only access the ``hidden'' space in which the objects live through a similarity oracle. The oracle, given two reference o... | [
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14276225 | 0909.2188 | 2009-09-11 | A Fault Tolerant, Area Efficient Architecture for Shor's Factoring Algorithm | We optimize the area and latency of Shor's factoring while simultaneously improving fault tolerance through: (1) balancing the use of ancilla generators, (2) aggressive optimization of error correction, and (3) tuning the core adder circuits. Our custom CAD flow produces detailed layouts of the physical components and ... | [
"quant-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
7762787 | 0909.2214 | 2009-09-11 | The single ring theorem | We study the empirical measure $L_{A_n}$ of the eigenvalues of non-normal square matrices of the form $A_n=U_nD_nV_n$ with $U_n,V_n$ independent Haar distributed on the unitary group and $D_n$ real diagonal. We show that when the empirical measure of the eigenvalues of $D_n$ converges, and $D_n$ satisfies some technica... | [
"math.PR",
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] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
2743936 | 0909.2074 | 2009-09-11 | Sum Capacity of MIMO Interference Channels in the Low Interference Regime | Using Gaussian inputs and treating interference as noise at the receivers has recently been shown to be sum capacity achieving for the two-user single-input single-output (SISO) Gaussian interference channel in a low interference regime, where the interference levels are below certain thresholds. In this paper, such a ... | [
"cs.IT",
"math.IT"
] | null | [
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{
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{
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{
"author_id": "v veeravalli_1",
"name": "Venugopal [\"V.\"] Veeravalli",
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"h... | null |
9208024 | 0909.2353 | 2009-09-12 | Clustering Based on Pairwise Distances When the Data is of Mixed Dimensions | In the context of clustering, we consider a generative model in a Euclidean ambient space with clusters of different shapes, dimensions, sizes and densities. In an asymptotic setting where the number of points becomes large, we obtain theoretical guaranties for a few emblematic methods based on pairwise distances: a si... | [
"stat.ML",
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] | null | [
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{
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{
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}
] | null |
512412 | 0909.2370 | 2009-09-12 | Comprehensive Security Framework for Global Threads Analysis | Cyber criminality activities are changing and becoming more and more professional. With the growth of financial flows through the Internet and the Information System (IS), new kinds of thread arise involving complex scenarios spread within multiple IS components. The IS information modeling and Behavioral Analysis are ... | [
"cs.CR"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "j saraydaryan_1",
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},
{
"author_id": "f benali_0",
"name": "Fatiha Benali",
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18258885 | 0909.2382 | 2009-09-12 | Escape dynamics in collinear atomic-like three mass point systems | The present paper studies the escape mechanism in collinear three point mass systems with small-range-repulsive/large-range-attractive pairwise-interaction. Specifically, we focus on systems with non-negative total energy. We show that on the zero energy level set, most of the orbits lead to binary escape configuration... | [
"math-ph",
"math.MP"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "d pasca_0",
"name": "Daniel Pasca",
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{
"author_id": "m santoprete_1",
"name": "Manuele Santoprete",
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"num_papers": nu... | null |
7023246 | 0909.2453 | 2009-09-13 | Toda Theories, Matrix Models, Topological Strings, and N=2 Gauge Systems | We consider the topological string partition function, including the Nekrasov deformation, for type IIB geometries with an A_{n-1} singularity over a Riemann surface. These models realize the N=2 SU(n) superconformal gauge systems recently studied by Gaiotto and collaborators. Employing large N dualities we show why th... | [
"hep-th"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
16630582 | 0909.2438 | 2009-09-13 | Numerical computations for the Schramm-Loewner Evolution | We review two numerical methods related to the Schramm-Loewner evolution (SLE). The first simulates SLE itself. More generally, it finds the curve in the half-plane that results from the Loewner equation for a given driving function. The second method can be thought of as the inverse problem. Given a simple curve in th... | [
"math-ph",
"math.MP"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
2361176 | 0909.2408 | 2009-09-13 | Coordination Capacity | We develop elements of a theory of cooperation and coordination in networks. Rather than considering a communication network as a means of distributing information, or of reconstructing random processes at remote nodes, we ask what dependence can be established among the nodes given the communication constraints. Speci... | [
"cs.IT",
"math.IT"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
394545 | 0909.2623 | 2009-09-14 | Reducing Network Traffic in Unstructured P2P Systems Using Top-k Queries | A major problem of unstructured P2P systems is their heavy network traffic. This is caused mainly by high numbers of query answers, many of which are irrelevant for users. One solution to this problem is to use Top-k queries whereby the user can specify a limited number (k) of the most relevant answers. In this paper, ... | [
"cs.DB"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "r akbarinia_1",
"name": "Reza Akbarinia",
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},
{
"author_id": "e pacitti_1",
"name": "Esther Pacitti",
"publication_history": null,
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"num_papers": nul... | null |
16611337 | 0909.2624 | 2009-09-14 | Double Kernel estimation of sensitivities | This paper adresses the general issue of estimating the sensitivity of the expectation of a random variable with respect to a parameter characterizing its evolution. In finance for example, the sensitivities of the price of a contingent claim are called the Greeks. A new way of estimating the Greeks has been recently i... | [
"q-fin.CP",
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] | null | [
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] | [
{
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] | [
{
"author_id": "r élie_1",
"name": "Romuald Élie",
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}
] | null |
39787518 | 0909.2674 | 2009-09-14 | Universal and non-universal properties of wave chaotic scattering systems | The application of random matrix theory to scattering requires introduction of system-specific information. This paper shows that the average impedance matrix, which characterizes such system-specific properties, can be semiclassically calculated in terms of ray trajectories between ports. Theoretical predictions are c... | [
"cond-mat.stat-mech",
"cond-mat.dis-nn",
"nlin.CD"
] | null | [
"target.author.publication_history",
"target.author.publication_history.key_reference"
] | [] | [
{
"author_id": "j yeh_2",
"name": "Jen-Hao Yeh",
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},
{
"author_id": "j hart_1",
"name": "James [\"A\"] Hart",
"publication_history": null,
"h_index": null,
"num_papers": null,
"... | null |
119277247 | 0909.2460 | 2009-09-14 | Higgs Boson Searches and the Hbbar Coupling at the LHeC | Once the existence of the Higgs boson is established at the CERN Large Hadron Collider (LHC), the focus will be shifted toward understanding its couplings to other particles. A crucial aspect is the measurement of the bottom Yukawa coupling, which is challenging at the LHC. In this paper we study the use of forward jet... | [
"hep-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
9072521 | 0909.2255 | 2009-09-14 | The Contribution of High Redshift Galaxies to Cosmic Reionization: New Results from Deep WFC3 Imaging of the Hubble Ultra Deep Field | We have searched for star-forming galaxies at z~7 by applying the Lyman-break technique to newly-released 1.1micron Y-band images from WFC3 on HST. By comparing these images of the Hubble Ultra Deep Field with the ACS z'-band (0.85micron), we identify objects with red colours, (z'-Y)_AB>1.3), consistent with the Ly-alp... | [
"astro-ph.CO"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
2525119 | 0909.2631 | 2009-09-14 | Specificity and Completion Time Distributions of Biochemical Processes | In order to produce specific complex structures from a large set of similar biochemical building blocks, many biochemical systems require high sensitivity to small molecular differences. The first and most common model used to explain this high specificity is kinetic proofreading, which has been extended to a variety o... | [
"cond-mat.stat-mech",
"q-bio.QM",
"q-bio.SC"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "b munsky_1",
"name": "Brian Munsky",
"publication_history": null,
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"num_papers": null,
"num_citations": null
},
{
"author_id": "i nemenman_1",
"name": "Ilya Nemenman",
"publication_history": null,
"h_index": null,
"num_papers": null,
... | null |
10105423 | 0909.2662 | 2009-09-14 | The Formation Mechanism of Gas Giants on Wide Orbits | The recent discoveries of massive planets on ultra-wide orbits of HR 8799 (Marois et al. 2008) and Fomalhaut (Kalas et al. 2008) present a new challenge for planet formation theorists. Our goal is to figure out which of three giant planet formation mechanisms--core accretion (with or without migration), scattering from... | [
"astro-ph.EP"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
560521 | 0909.2692 | 2009-09-14 | Cosmology with Photometric Surveys of Type Ia Supernovae | We discuss the extent to which photometric measurements alone can be used to identify Type Ia supernovae (SNIa) and to determine redshift and other parameters of interest for cosmological studies. We fit the light curve data of the type expected from a survey such as the one planned with Large Synoptic Survey Telescope... | [
"astro-ph.CO"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
9840000 | 0909.2817 | 2009-09-15 | Strongly Cancellative and Recovering Sets On Lattices | We use information theory to study recovering sets $\R_L$ and strongly cancellative sets $\C_L$ on different lattices. These sets are special classes of recovering pairs and cancellative sets previously discussed in [1], [3] and [5]. We mainly focus on the lattices $B_n$ and $D_{l}^{k}$. Specifically, we find upper bou... | [
"math.CO",
"cs.IT",
"math.IT"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "h bidkhori_1",
"name": "Hoda Bidkhori",
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"num_citations": null
},
{
"author_id": "s huang_170",
"name": "ShinnYih Huang",
"publication_history": null,
"h_index": null,
"num_papers": null,... | null |
17391698 | 0909.2853 | 2009-09-15 | Evidence for a fast evolution of the UV luminosity function beyond redshift 6 from a deep HAWK-I survey of the GOODS-S field | We perform a deep search for galaxies in the redshift range 6.5<z<7.5, to measure the evolution of the number density of luminous galaxies in this redshift range and derive useful constraints on the evolution of their Luminosity Function. We present here the first results of an ESO Large Program, that exploits the uniq... | [
"astro-ph.CO",
"astro-ph.IM"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "m castellano_1",
"name": "Marco Castellano",
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"num_citations": null
},
{
"author_id": "a fontana_2",
"name": "Adriano Fontana",
"publication_history": null,
"h_index": null,
"num_papers":... | null |
8435751 | 0909.2894 | 2009-09-15 | Adaptive Spatial Intercell Interference Cancellation in Multicell Wireless Networks | Downlink spatial intercell interference cancellation (ICIC) is considered for mitigating other-cell interference using multiple transmit antennas. A principle question we explore is whether it is better to do ICIC or simply standard single-cell beamforming. We explore this question analytically and show that beamformin... | [
"cs.IT",
"math.IT"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
6984566 | 0909.2838 | 2009-09-15 | Conformal windows of SP(2N) and SO(N) gauge theories from topological excitations on R3 * S1 | We derive an estimate of the lower boundary of the conformal window of SP(2N) and SO(N) gauge theories with fermionic matter in several different representations. We calculate the index of topological excitations for these groups on the manifold R3 * S1, from which we deduce the scale of the generation of the mass gap ... | [
"hep-th",
"hep-lat"
] | null | [
"target.author.publication_history"
] | [
{
"corpus_id": "119112496",
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},
{
"corpus_id": "15035181",
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{
"corpus_id": "17103287",
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},
{
"corpus_id": "16332059",
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}
] | [
{
"author_id": "s golkar_1",
"name": "Siavash Golkar",
"publication_history": null,
"h_index": null,
"num_papers": null,
"num_citations": null
}
] | null |
2195850 | 0909.2793 | 2009-09-15 | Enhanced sampling schemes for MCMC based blind Bernoulli-Gaussian deconvolution | This paper proposes and compares two new sampling schemes for sparse deconvolution using a Bernoulli-Gaussian model. To tackle such a deconvolution problem in a blind and unsupervised context, the Markov Chain Monte Carlo (MCMC) framework is usually adopted, and the chosen sampling scheme is most often the Gibbs sample... | [
"cs.NA"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
8619387 | 0909.2705 | 2009-09-15 | SET: an algorithm for consistent matrix completion | A new algorithm, termed subspace evolution and transfer (SET), is proposed for solving the consistent matrix completion problem. In this setting, one is given a subset of the entries of a low-rank matrix, and asked to find one low-rank matrix consistent with the given observations. We show that this problem can be solv... | [
"cs.IT",
"math.IT"
] | null | [
"target.author.publication_history",
"target.author.publication_history.key_reference"
] | [
{
"corpus_id": "53504",
"num_citations": null
},
{
"corpus_id": "1254778",
"num_citations": null
}
] | [
{
"author_id": "w dai_6",
"name": "Wei Dai",
"publication_history": null,
"h_index": null,
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"num_citations": null
},
{
"author_id": "o milenkovic_1",
"name": "Olgica Milenkovic",
"publication_history": null,
"h_index": null,
"num_papers": null,
... | null |
2787595 | 0909.2927 | 2009-09-15 | Distribution-Specific Agnostic Boosting | We consider the problem of boosting the accuracy of weak learning algorithms in the agnostic learning framework of Haussler (1992) and Kearns et al. (1992). Known algorithms for this problem (Ben-David et al., 2001; Gavinsky, 2002; Kalai et al., 2008) follow the same strategy as boosting algorithms in the PAC model: th... | [
"cs.LG",
"cs.CC"
] | null | [
"target.author.publication_history",
"target.author.publication_history.key_reference",
"target.key_reference"
] | [] | [
{
"author_id": "v feldman_1",
"name": "Vitaly Feldman",
"publication_history": null,
"h_index": null,
"num_papers": null,
"num_citations": null
}
] | null |
25139557 | 0909.2867 | 2009-09-15 | Inspiral-merger-ringdown waveforms for black-hole binaries with non-precessing spins | We present the first analytical inspiral-merger-ringdown gravitational waveforms from binary black holes (BBHs) with non-precessing spins, that is based on a description of the late-inspiral, merger and ringdown in full general relativity. By matching a post-Newtonian description of the inspiral to a set of numerical-r... | [
"gr-qc",
"astro-ph.CO"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
5669393 | 0909.2859 | 2009-09-15 | Electric routing and concurrent flow cutting | We investigate an oblivious routing scheme, amenable to distributed computation and resilient to graph changes, based on electrical flow. Our main technical contribution is a new rounding method which we use to obtain a bound on the L1->L1 operator norm of the inverse graph Laplacian. We show how this norm reflects bot... | [
"cs.DM",
"cs.DC"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "j kelner_2",
"name": "Jonathan [\"A.\"] Kelner",
"publication_history": null,
"h_index": null,
"num_papers": null,
"num_citations": null
},
{
"author_id": "p maymounkov_1",
"name": "Petar Maymounkov",
"publication_history": null,
"h_index": null,
"num_... | null |
118866606 | 0909.2776 | 2009-09-15 | Quintom Cosmology: Theoretical implications and observations | We review the paradigm of quintom cosmology. This scenario is motivated by the observational indications that the equation of state of dark energy across the cosmological constant boundary is mildly favored, although the data are still far from being conclusive. As a theoretical setup we introduce a no-go theorem exist... | [
"hep-th",
"astro-ph.CO",
"gr-qc",
"hep-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
12524177 | 0909.2875 | 2009-09-15 | A Search for Additional Planets in the NASA EPOXI Observations of the Exoplanet System GJ 436 | We present time series photometry of the M dwarf transiting exoplanet system GJ 436 obtained with the the EPOCh (Extrasolar Planet Observation and Characterization) component of the NASA EPOXI mission. We conduct a search of the high-precision time series for additional planets around GJ 436, which could be revealed ei... | [
"astro-ph.EP"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
14666979 | 0909.2804 | 2009-09-15 | A strategy for non-strictly convex transport costs and the example of ||x-y||p in R2 | This paper deals with the existence of optimal transport maps for some optimal transport problems with a convex but non strictly convex cost. We give a decomposition strategy to address this issue. As part of our strategy, we have to treat some transport problems, of independent interest, with a convex constraint on th... | [
"math.CA",
"math.OC"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
18461179 | 0909.2708 | 2009-09-15 | Exchange bias driven by the Dzyaloshinskii-Moriya interaction and ferroelectric polarization at G-type antiferromagnetic perovskite interfaces | Exchange bias is usually rationalized invoking spin pinning effects caused by uncompensated antiferromagnetic interfaces. However, for compensated antiferromagnets other extrinsic factors, such as interface roughness or spin canting, have to be considered to produce a small uncompensation. As an alternative, here we pr... | [
"cond-mat.mtrl-sci",
"cond-mat.str-el"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
954547 | 0909.3078 | 2009-09-16 | Pair Distribution Function of a Square-Well Fluid | The properties of the ground state of liquid $^4$He are studied using a correlated basis function of the form $\prod_{i<j} \psi(r_{ij})$. Here, $\psi(r)$ is chosen as the exact solution of the Schr\"{o}dinger equation for two $^4$He atoms. A hard-sphere plus an attractive square well is used as the interaction potentia... | [
"cond-mat.other",
"cond-mat.quant-gas"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "s neogi_1",
"name": "Sanghamitra Neogi",
"publication_history": null,
"h_index": null,
"num_papers": null,
"num_citations": null
},
{
"author_id": "g mahan_1",
"name": "Gerald [\"Dennis\"] Mahan",
"publication_history": null,
"h_index": null,
"num_pape... | null |
18331442 | 0909.3030 | 2009-09-16 | Scaling of phononic transport with connectivity in amorphous solids | The effect of coordination on transport is investigated theoretically using random networks of springs as model systems. An effective medium approximation is made to compute the density of states of the vibrational modes, their energy diffusivity (a spectral measure of transport) and their spatial correlations as the n... | [
"cond-mat.soft",
"cond-mat.mtrl-sci"
] | null | [
"target.author.publication_history",
"target.author.publication_history.key_reference"
] | [] | [
{
"author_id": "m wyart_1",
"name": "Matthieu Wyart",
"publication_history": null,
"h_index": null,
"num_papers": null,
"num_citations": null
}
] | null |
3155802 | 0909.3135 | 2009-09-16 | A Random Variable Substitution Lemma With Applications to Multiple Description Coding | We establish a random variable substitution lemma and use it to investigate the role of refinement layer in multiple description coding, which clarifies the relationship among several existing achievable multiple description rate-distortion regions. Specifically, it is shown that the El Gamal-Cover (EGC) region is equi... | [
"cs.IT",
"math.IT"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "j wang_593",
"name": "Jia Wang",
"publication_history": null,
"h_index": null,
"num_papers": null,
"num_citations": null
},
{
"author_id": "j chen_287",
"name": "Jun Chen",
"publication_history": null,
"h_index": null,
"num_papers": null,
"num_cita... | null |
62421702 | 0909.3052 | 2009-09-16 | Cross-Validation for Unsupervised Learning | Cross-validation (CV) is a popular method for model-selection. Unfortunately, it is not immediately obvious how to apply CV to unsupervised or exploratory contexts. This thesis discusses some extensions of cross-validation to unsupervised learning, specifically focusing on the problem of choosing how many principal com... | [
"stat.ME",
"math.ST",
"stat.TH"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
15134576 | 0909.3055 | 2009-09-16 | Compressive Sensing Based Opportunistic Protocol for Throughput Improvement in Wireless Networks | A key feature in the design of any MAC protocol is the throughput it can provide. In wireless networks, the channel of a user is not fixed but varies randomly. Thus, in order to maximize the throughput of the MAC protocol at any given time, only users with large channel gains should be allowed to transmit. In this pape... | [
"cs.IT",
"math.IT"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "s qaseem_0",
"name": "Syed [\"T.\"] Qaseem",
"publication_history": null,
"h_index": null,
"num_papers": null,
"num_citations": null
},
{
"author_id": "t al-naffouri_1",
"name": "Tareq [\"Y.\"] Al-Naffouri",
"publication_history": null,
"h_index": null,
... | null |
119252914 | 0909.2868 | 2009-09-16 | On the Classification of Brane Tilings | We present a computationally efficient algorithm that can be used to generate all possible brane tilings. Brane tilings represent the largest class of superconformal theories with known AdS duals in 3+1 and also 2+1 dimensions and have proved useful for describing the physics of both D3 branes and also M2 branes probin... | [
"hep-th"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
8995726 | 0909.3123 | 2009-09-16 | Median K-flats for hybrid linear modeling with many outliers | We describe the Median K-Flats (MKF) algorithm, a simple online method for hybrid linear modeling, i.e., for approximating data by a mixture of flats. This algorithm simultaneously partitions the data into clusters while finding their corresponding best approximating l1 d-flats, so that the cumulative l1 error is minim... | [
"cs.CV",
"cs.LG"
] | null | [
"target.author.publication_history",
"target.author.publication_history.key_reference"
] | [] | [
{
"author_id": "t zhang_9",
"name": "Teng Zhang",
"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,
"num_... | null |
17251448 | 0909.2904 | 2009-09-16 | Computing p-values of LiNGAM outputs via Multiscale Bootstrap | Structural equation models and Bayesian networks have been widely used to study causal relationships between continuous variables. Recently, a non-Gaussian method called LiNGAM was proposed to discover such causal models and has been extended in various directions. An important problem with LiNGAM is that the results a... | [
"stat.ML",
"stat.ME"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "y komatsu_1",
"name": "Yusuke Komatsu",
"publication_history": null,
"h_index": null,
"num_papers": null,
"num_citations": null
},
{
"author_id": "s shimizu_1",
"name": "Shohei Shimizu",
"publication_history": null,
"h_index": null,
"num_papers": null,... | null |
398456 | 0909.3080 | 2009-09-16 | Socio-semantic dynamics in a blog network | The blogosphere can be construed as a knowledge network made of bloggers who are interacting through a social network to share, exchange or produce information. We claim that the social and semantic dimensions are essentially co-determined and propose to investigate the co-evolutionary dynamics of the blogosphere by ex... | [
"cs.CY",
"physics.soc-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
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