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6851168
0906.3236
2009-06-17
Universality of solar wind turbulent spectrum from MHD to electron scales
In order to investigate the universality of magnetic turbulence in space plasmas we analyze seven time periods in the free solar wind of different origin, slow or fast, and under different plasma conditions. The orientation of magnetic field to the flow velocity was always quasi-perpendicular. Unique combination of thr...
[ "physics.plasm-ph", "physics.space-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
11361894
0906.3192
2009-06-17
Secured Communication over Frequency-Selective Fading Channels: a practical Vandermonde precoding
In this paper, we study the frequency-selective broadcast channel with confidential messages (BCC) in which the transmitter sends a confidential message to receiver 1 and a common message to receivers 1 and 2. In the case of a block transmission of N symbols followed by a guard interval of L symbols, the frequency-sele...
[ "cs.IT", "math.IT" ]
null
[ "target.author.publication_history" ]
[ { "corpus_id": "6175181", "num_citations": null }, { "corpus_id": "47043747", "num_citations": null }, { "corpus_id": "12582597", "num_citations": null }, { "corpus_id": "15162958", "num_citations": null } ]
[ { "author_id": "m kobayashi_5", "name": "Mari Kobayashi", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "m debbah_1", "name": "Mérouane Debbah", "publication_history": null, "h_index": null, "num_papers": nul...
null
115165642
0906.3195
2009-06-17
Time Asymptotics and Entanglement Generation of Clifford Quantum Cellular Automata
We consider Clifford Quantum Cellular Automata (CQCAs) and their time evolution. CQCAs are an especially simple type of Quantum Cellular Automata, yet they show complex asymptotics and can even be a basic ingredient for universal quantum computation. In this work we study the time evolution of different classes of CQCA...
[ "quant-ph", "cond-mat.stat-mech", "math-ph", "math.MP" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
14144964
0906.3149
2009-06-17
Semi-Myopic Sensing Plans for Value Optimization
We consider the following sequential decision problem. Given a set of items of unknown utility, we need to select one of as high a utility as possible (``the selection problem''). Measurements (possibly noisy) of item values prior to selection are allowed, at a known cost. The goal is to optimize the overall sequential...
[ "cs.AI" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "d tolpin_1", "name": "David Tolpin", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "s shimony_1", "name": "S. [\"E.\"] Shimony", "publication_history": null, "h_index": null, "num_papers": nul...
null
115172814
0906.3325
2009-06-18
An easy proof of Jensen's theorem on the uniqueness of infinity harmonic functions
We present a new, easy, and elementary proof of Jensen's Theorem on the uniqueness of infinity harmonic functions. The idea is to pass to a finite difference equation by taking maximums and minimums over small balls.
[ "math.AP" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
2005756
0906.3507
2009-06-18
The common patterns of nature
We typically observe large-scale outcomes that arise from the interactions of many hidden, small-scale processes. Examples include age of disease onset, rates of amino acid substitutions, and composition of ecological communities. The macroscopic patterns in each problem often vary around a characteristic shape that ca...
[ "q-bio.QM", "physics.data-an", "q-bio.PE" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
1478915
0906.3498
2009-06-18
The UV-Excess Survey of the Northern Galactic Plane (UVEX)
The UV-Excess Survey of the Northern Galactic Plane images a 10x185 degree wide band, centered on the Galactic Equator using the 2.5m Isaac Newton Telescope in four bands (U,g,r,HeI5875) down to ~21st-22nd magnitude (~20th in HeI5875). The setup and data reduction procedures are described. Simulations of the colours of...
[ "astro-ph.GA" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
1840866
0906.3475
2009-06-18
A weak trapezoidal method for a class of stochastic differential equations
We present a numerical method for the approximation of solutions for the class of stochastic differential equations driven by Brownian motions which induce stochastic variation in fixed directions. This class of equations arises naturally in the study of population processes and chemical reaction kinetics. We show that...
[ "math.NA", "math.PR" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[]
[ { "author_id": "d anderson_15", "name": "David [\"F.\"] Anderson", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "j mattingly_1", "name": "Jonathan [\"C.\"] Mattingly", "publication_history": null, "h_index": nul...
null
16272403
0906.3465
2009-06-18
Transposable regularized covariance models with an application to missing data imputation
Missing data estimation is an important challenge with high-dimensional data arranged in the form of a matrix. Typically this data matrix is transposable, meaning that either the rows, columns or both can be treated as features. To model transposable data, we present a modification of the matrix-variate normal, the mea...
[ "stat.AP", "stat.ME", "stat.ML" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
14041263
0906.3392
2009-06-18
Affine processes are regular
We show that stochastically continuous, time-homogeneous affine processes on the canonical state space $\Rplus^m \times \RR^n$ are always regular. In the paper of \citet{Duffie2003} regularity was used as a crucial basic assumption. It was left open whether this regularity condition is automatically satisfied, for stoc...
[ "math.PR" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[]
[ { "author_id": "m keller-ressel_1", "name": "Martin Keller-Ressel", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "w schachermayer_1", "name": "Walter Schachermayer", "publication_history": null, "h_index": null,...
null
14031290
0906.3529
2009-06-18
Multivariate Gaussians, Semidefinite Matrix Completion, and Convex Algebraic Geometry
We study multivariate normal models that are described by linear constraints on the inverse of the covariance matrix. Maximum likelihood estimation for such models leads to the problem of maximizing the determinant function over a spectrahedron, and to the problem of characterizing the image of the positive definite co...
[ "math.ST", "math.AG", "math.OC", "stat.TH" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[ { "corpus_id": "14244836", "num_citations": null }, { "corpus_id": "15388235", "num_citations": null } ]
[ { "author_id": "b sturmfels_1", "name": "Bernd Sturmfels", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "c uhler_1", "name": "Caroline Uhler", "publication_history": null, "h_index": null, "num_papers": null...
null
2859353
0906.3558
2009-06-18
Estimating achievement from fame
We report a method for estimating people's achievement based on their fame. Earlier we discovered (cond-mat/0310049) that fame of fighter pilot aces (measured as number of Google hits) grows exponentially with their achievement (number of victories). We hypothesize that the same functional relation between achievement ...
[ "physics.soc-ph", "cs.CY", "physics.hist-ph", "stat.AP" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "m simkin_1", "name": "Mikhail [\"V.\"] Simkin", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "v roychowdhury_1", "name": "Vwani [\"P.\"] Roychowdhury", "publication_history": null, "h_index": nul...
null
1968979
0906.3499
2009-06-18
Convergence of fixed-point continuation algorithms for matrix rank minimization
The matrix rank minimization problem has applications in many fields such as system identification, optimal control, low-dimensional embedding, etc. As this problem is NP-hard in general, its convex relaxation, the nuclear norm minimization problem, is often solved instead. Recently, Ma, Goldfarb and Chen proposed a fi...
[ "math.OC", "cs.IT", "math.IT" ]
null
[ "target.author.publication_history.key_reference", "target.key_reference" ]
null
null
null
115173078
0906.3487
2009-06-18
Tightness in contact metric 3-manifolds
This paper begins the study of relations between Riemannian geometry and global properties of contact structures on 3-manifolds. In particular we prove an analog of the sphere theorem from Riemannian geometry in the setting of contact geometry. Specifically, if a given three dimensional contact manifold (M,\xi) admits ...
[ "math.SG", "math.DG", "math.GT" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
118856900
0906.3342
2009-06-18
Spacelike matching to null infinity
We present two methods to include the asymptotic domain of a background spacetime in null directions for numerical solutions of evolution equations so that both the radiation extraction problem and the outer boundary problem are solved. The first method is based on the geometric conformal approach, the second is a coor...
[ "gr-qc" ]
null
[ "target.author.publication_history" ]
[ { "corpus_id": "16321244", "num_citations": null } ]
[ { "author_id": "a zenginoglu_1", "name": "Anil Zenginoglu", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "m tiglio_1", "name": "Manuel Tiglio", "publication_history": null, "h_index": null, "num_papers": nul...
null
14170812
0906.3635
2009-06-19
Capillary filling with wall corrugations] Capillary filling in microchannels with wall corrugations: A comparative study of the Concus-Finn criterion by continuum, kinetic and atomistic approaches
We study the impact of wall corrugations in microchannels on the process of capillary filling by means of three broadly used methods - Computational Fluid Dynamics (CFD), Lattice-Boltzmann Equations (LBE) and Molecular Dynamics (MD). The numerical results of these approaches are compared and tested against the Concus-F...
[ "physics.flu-dyn" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "s chibbaro_1", "name": "Sergio Chibbaro", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "e costa_5", "name": "Emiliano Costa", "publication_history": null, "h_index": null, "num_papers": null,...
null
11771572
0906.3590
2009-06-19
Forest Garrote
Variable selection for high-dimensional linear models has received a lot of attention lately, mostly in the context of l1-regularization. Part of the attraction is the variable selection effect: parsimonious models are obtained, which are very suitable for interpretation. In terms of predictive power, however, these re...
[ "stat.ML" ]
null
[ "target.author.publication_history" ]
[ { "corpus_id": "16884658", "num_citations": null } ]
[ { "author_id": "n meinshausen_1", "name": "Nicolai Meinshausen", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null } ]
null
15007614
0906.3554
2009-06-19
On the Algorithmic Nature of the World
We propose a test based on the theory of algorithmic complexity and an experimental evaluation of Levin's universal distribution to identify evidence in support of or in contravention of the claim that the world is algorithmic in nature. To this end we have undertaken a statistical comparison of the frequency distribut...
[ "cs.CC", "cs.IT", "math.IT" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "h zenil_1", "name": "Hector Zenil", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "j delahaye_1", "name": "Jean-Paul Delahaye", "publication_history": null, "h_index": null, "num_papers": null...
null
120225606
0906.3694
2009-06-19
Obstacle and predator avoidance by a flock
The modeling and investigation of the dynamics and configurations of animal groups is a subject of growing attention. In this paper, we present a continuum model of flocking and use it to investigate the reaction of a flock to an obstacle or an attacking predator. We show that the flock response is in the form of densi...
[ "nlin.AO", "nlin.CD" ]
null
[ "target.author.publication_history" ]
[ { "corpus_id": "19509007", "num_citations": null } ]
[ { "author_id": "n mecholsky_1", "name": "Nicholas [\"A.\"] Mecholsky", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "e ott_1", "name": "Edward Ott", "publication_history": null, "h_index": null, "num_papers"...
null
119166461
0906.3703
2009-06-19
When finite-size corrections vanish: The S=1/2 XXZ model and the Razumov-Stroganov state
We study the one-dimensional $S=1/2$ XXZ model on a finite lattice at zero temperature, varying the exchange anisotropy $\Delta$ and the number of sites $N$ of the lattice. Special emphasis is given to the model with $\Delta=1/2$ and $N$ odd, whose ground state, the so-called Razumov-Stroganov state, has a peculiar str...
[ "cond-mat.str-el", "cond-mat.stat-mech", "quant-ph" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "l banchi_1", "name": "Leonardo Banchi", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "f colomo_0", "name": "Filippo Colomo", "publication_history": null, "h_index": null, "num_papers": null, ...
null
9745300
0906.3722
2009-06-19
Two-Dimensional ARMA Modeling for Breast Cancer Detection and Classification
We propose a new model-based computer-aided diagnosis (CAD) system for tumor detection and classification (cancerous v.s. benign) in breast images. Specifically, we show that (x-ray, ultrasound and MRI) images can be accurately modeled by two-dimensional autoregressive-moving average (ARMA) random fields. We derive a t...
[ "cs.AI", "cs.CV", "physics.med-ph" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "n bouaynaya_1", "name": "Nidhal [\"Carla\"] Bouaynaya", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "j zielinski_0", "name": "Jerzy [\"S.\"] Zielinski", "publication_history": null, "h_index": n...
null
478613
0906.3682
2009-06-19
Large System Analysis of Linear Precoding in Correlated MISO Broadcast Channels under Limited Feedback
In this paper, we study the sum rate performance of zero-forcing (ZF) and regularized ZF (RZF) precoding in large MISO broadcast systems under the assumptions of imperfect channel state information at the transmitter and per-user channel transmit correlation. Our analysis assumes that the number of transmit antennas $M...
[ "cs.IT", "math.IT" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[ { "corpus_id": "14018037", "num_citations": null }, { "corpus_id": "2138623", "num_citations": null } ]
[ { "author_id": "s wagner_5", "name": "Sebastian Wagner", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "r couillet_1", "name": "Romain Couillet", "publication_history": null, "h_index": null, "num_papers": nu...
null
8555359
0906.3704
2009-06-19
Resolving the hot dust around HD69830 and eta Corvi with MIDI and VISIR
Most of the known debris discs exhibit cool dust in regions analogous to the Edgeworth-Kuiper Belt. However, a rare subset show hot excess from within a few AU, which is often inferred to be transient. We examine 2 such sources to place limits on their location to help distinguish between different interpretations for ...
[ "astro-ph.EP" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
15658327
0906.3654
2009-06-19
Accuracy of direct gradient sensing by cell-surface receptors
Chemotactic cells of eukaryotic organisms are able to accurately sense shallow chemical concentration gradients using cell-surface receptors. This sensing ability is remarkable as cells must be able to spatially resolve small fractional differences in the numbers of particles randomly arriving at cell-surface receptors...
[ "q-bio.CB", "q-bio.SC" ]
null
[ "target.author.publication_history" ]
[ { "corpus_id": "15225727", "num_citations": null }, { "corpus_id": "63484", "num_citations": null } ]
[ { "author_id": "r endres_1", "name": "Robert [\"G.\"] Endres", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "n wingreen_1", "name": "Ned [\"S.\"] Wingreen", "publication_history": null, "h_index": null, "num...
null
8440251
0906.3667
2009-06-19
A Deterministic Equivalent for the Analysis of Correlated MIMO Multiple Access Channels
In this article, novel deterministic equivalents for the Stieltjes transform and the Shannon transform of a class of large dimensional random matrices are provided. These results are used to characterise the ergodic rate region of multiple antenna multiple access channels, when each point-to-point propagation channel i...
[ "cs.IT", "math.IT" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[ { "corpus_id": "14018037", "num_citations": null }, { "corpus_id": "14411977", "num_citations": null } ]
[ { "author_id": "r couillet_1", "name": "Romain Couillet", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "m debbah_1", "name": "Mérouane Debbah", "publication_history": null, "h_index": null, "num_papers": nul...
null
18875110
0906.3726
2009-06-19
Interpretation of the Underground Muon Charge Ratio
The MINOS experiment has observed a rise in the underground muon charge ratio $r_\mu$ = ${\mu^+/\mu^-}$. This ratio can be related to the atmospheric production ratios of ${\pi^+/\pi^-}$ and ${K^+/K^-}$. Our analysis indicates that the relevant variable for studying the charge ratio+ $\ecos$, rather than $\emu$. We com...
[ "hep-ph", "hep-ex" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
14221210
0906.3662
2009-06-19
The Statistical Analysis of fMRI Data
In recent years there has been explosive growth in the number of neuroimaging studies performed using functional Magnetic Resonance Imaging (fMRI). The field that has grown around the acquisition and analysis of fMRI data is intrinsically interdisciplinary in nature and involves contributions from researchers in neuros...
[ "stat.ME", "q-bio.NC" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
118490899
0906.3575
2009-06-19
Huffman Coding as a Non-linear Dynamical System
In this paper, source coding or data compression is viewed as a measurement problem. Given a measurement device with fewer states than the observable of a stochastic source, how can one capture the essential information? We propose modeling stochastic sources as piecewise linear discrete chaotic dynamical systems known...
[ "nlin.CD" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
10479644
0906.3736
2009-06-19
Weight Optimization for Consensus Algorithms with Correlated Switching Topology
We design the weights in consensus algorithms with spatially correlated random topologies. These arise with: 1) networks with spatially correlated random link failures and 2) networks with randomized averaging protocols. We show that the weight optimization problem is convex for both symmetric and asymmetric random gra...
[ "cs.IT", "math.IT" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[]
[ { "author_id": "d jakovetić_1", "name": "Dušan Jakovetić", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "j xavier_1", "name": "João [\"M.\",\"F.\"] Xavier", "publication_history": null, "h_index": null, "num...
null
9468107
0906.3829
2009-06-20
On the consistent separation of scale and variance for Gaussian random fields
We present fixed domain asymptotic results that establish consistent estimates of the variance and scale parameters for a Gaussian random field with a geometric anisotropic Mat\'ern autocovariance in dimension $d>4$. When $d<4$ this is impossible due to the mutual absolute continuity of Mat\'ern Gaussian random fields ...
[ "math.ST", "stat.TH" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
9123062
0906.3741
2009-06-20
How opinions are received by online communities: A case study on Amazon.com helpfulness votes
There are many on-line settings in which users publicly express opinions. A number of these offer mechanisms for other users to evaluate these opinions; a canonical example is Amazon.com, where reviews come with annotations like "26 of 32 people found the following review helpful." Opinion evaluation appears in many of...
[ "cs.CL", "cs.IR", "physics.data-an", "physics.soc-ph" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "c danescu-niculescu-mizil_1", "name": "Cristian Danescu-Niculescu-Mizil", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "g kossinets_0", "name": "Gregory Kossinets", "publication_history": null, "...
null
5745066
0906.3864
2009-06-21
The Two-Tap Input-Erasure Gaussian Channel and its Application to Cellular Communications
This paper considers the input-erasure Gaussian channel. In contrast to the output-erasure channel where erasures are applied to the output of a linear time-invariant (LTI) system, here erasures, known to the receiver, are applied to the inputs of the LTI system. Focusing on the case where the input symbols are indepen...
[ "cs.IT", "math.IT" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[]
[ { "author_id": "o somekh_1", "name": "Oren Somekh", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "o simeone_1", "name": "Osvaldo Simeone", "publication_history": null, "h_index": null, "num_papers": null, ...
null
9618250
0906.3888
2009-06-21
Effective Capacity Analysis of Cognitive Radio Channels for Quality of Service Provisioning
In this paper, cognitive transmission under quality of service (QoS) constraints is studied. In the cognitive radio channel model, it is assumed that the secondary transmitter sends the data at two different average power levels, depending on the activity of the primary users, which is determined by channel sensing per...
[ "cs.IT", "math.IT" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "s akın_1", "name": "Sami Akın", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "m gursoy_2", "name": "Mustafa [\"Cenk\"] Gursoy", "publication_history": null, "h_index": null, "num_papers": nul...
null
14980033
0906.3899
2009-06-21
Imaging an Event Horizon: submm-VLBI of a Super Massive Black Hole
A long standing goal in astrophysics is to directly observe the immediate environment of a black hole with angular resolution comparable to the event horizon. Realizing this goal would open a new window on the study of General Relativity in the strong field regime, accretion and outflow processes at the edge of a black...
[ "astro-ph.CO", "astro-ph.GA" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
2549456
0906.3889
2009-06-21
Energy Efficiency in the Low-SNR Regime under Queueing Constraints and Channel Uncertainty
Energy efficiency of fixed-rate transmissions is studied in the presence of queueing constraints and channel uncertainty. It is assumed that neither the transmitter nor the receiver has channel side information prior to transmission. The channel coefficients are estimated at the receiver via minimum mean-square-error (...
[ "cs.IT", "math.IT" ]
null
[ "target.author.publication_history" ]
[ { "corpus_id": "2218201", "num_citations": null }, { "corpus_id": "3205203", "num_citations": null } ]
[ { "author_id": "d qiao_4", "name": "Deli Qiao", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "m gursoy_2", "name": "Mustafa [\"Cenk\"] Gursoy", "publication_history": null, "h_index": null, "num_papers": nul...
null
930929
0906.3869
2009-06-21
Size-dependent spinodal and miscibility gaps for intercalation in nano-particles
Using a recently-proposed mathematical model for intercalation dynamics in phase-separating materials [Singh, Ceder, Bazant, Electrochimica Acta 53, 7599 (2008)], we show that the spinodal and miscibility gaps generally shrink as the host particle size decreases to the nano-scale. Our work is motivated by recent experi...
[ "cond-mat.mtrl-sci", "cond-mat.mes-hall" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[]
[ { "author_id": "d burch_1", "name": "Damian [\"N.\"] Burch", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "m bazant_1", "name": "Martin [\"Z.\"] Bazant", "publication_history": null, "h_index": null, "num_pa...
null
8968442
0906.3887
2009-06-21
Energy-Efficient Modulation Design for Reliable Communication in Wireless Networks
In this paper, we have considered the optimization of the $M$-ary quadrature amplitude modulation (MQAM) constellation size to minimize the bit energy consumption under average bit error rate (BER) constraints. In the computation of the energy expenditure, the circuit, transmission, and retransmission energies are take...
[ "cs.IT", "math.IT" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[]
[ { "author_id": "q chen_77", "name": "Qing Chen", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "m gursoy_2", "name": "Mustafa [\"Cenk\"] Gursoy", "publication_history": null, "h_index": null, "num_papers": nu...
null
97857
0906.3883
2009-06-21
Diversity Analysis of Peaky FSK Signaling in Fading Channels
Error performance of noncoherent detection of on-off frequency shift keying (OOFSK) modulation over fading channels is analyzed when the receiver is equipped with multiple antennas. The analysis is conducted for two cases: 1) the case in which the receiver has the channel distribution knowledge only; and 2) the case in...
[ "cs.IT", "math.IT" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "m gursoy_2", "name": "Mustafa [\"Cenk\"] Gursoy", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "q wang_77", "name": "Qingyun Wang", "publication_history": null, "h_index": null, "num_papers":...
null
2675364
0906.3844
2009-06-21
Phase coupling estimation from multivariate phase statistics
Coupled oscillators are prevalent throughout the physical world. Dynamical system formulations of weakly coupled oscillator systems have proven effective at capturing the properties of real-world systems. However, these formulations usually deal with the `forward problem': simulating a system from known coupling parame...
[ "nlin.AO", "nlin.CD", "q-bio.QM" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
1409398
0906.4012
2009-06-22
Reduced-Feedback Opportunistic Scheduling and Beamforming with GMD for MIMO-OFDMA
Opportunistic scheduling and beamforming schemes have been proposed previously by the authors for reduced-feedback MIMO-OFDMA downlink systems where the MIMO channel of each subcarrier is decomposed into layered spatial subchannels. It has been demonstrated that significant feedback reduction can be achieved by returni...
[ "cs.IT", "math.IT" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "m pun_2", "name": "Man-On Pun", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "k kim_20", "name": "Kyeong [\"Jin\"] Kim", "publication_history": null, "h_index": null, "num_papers": null, ...
null
100313689
0906.4092
2009-06-22
Pricing European Options with a Log Student's t-Distribution: a Gosset Formula
The distribution of the returns for a stock are not well described by a normal probability density function (pdf). Student's t-distributions, which have fat tails, are known to fit the distributions of the returns. We present pricing of European call or put options using a log Student's t-distribution, which we call a ...
[ "q-fin.PR" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
9798131
0906.4086
2009-06-22
The effect of short ray trajectories on the scattering statistics of wave chaotic systems
In many situations, the statistical properties of wave systems with chaotic classical limits are well-described by random matrix theory. However, applications of random matrix theory to scattering problems require introduction of system specific information into the statistical model, such as the introduction of the av...
[ "cond-mat.stat-mech", "cond-mat.dis-nn" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[]
[ { "author_id": "j hart_1", "name": "James [\"A\"] Hart", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "t antonsen_1", "name": "Thomas [\"M.\"] Antonsen", "publication_history": null, "h_index": null, "num_pa...
null
119300821
0906.3985
2009-06-22
Minimal tomography with entanglement witnesses
We introduce informationally complete measurements whose outcomes are entanglement witnesses and so answer the question of how many witnesses need to be measured to decide whether an arbitrary state is entangled or not: as many as the dimension of the state space. The optimized witness-based measurement can provide exp...
[ "quant-ph" ]
null
[ "target.key_reference" ]
null
null
null
34350780
0906.3937
2009-06-22
Magnetic multipole analysis of kagome and artificial ice dipolar arrays
We analyse an array of linearly extended monodomain dipoles forming square and kagome lattices. We find that its phase diagram contains two (distinct) finite-entropy kagome ice regimes - one disordered, one algebraic - as well as a low-temperature ordered phase. In the limit of the islands almost touching, we find a st...
[ "cond-mat.stat-mech", "cond-mat.mtrl-sci" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
16971363
0906.3987
2009-06-22
The frequency spectrum of periodically modulated sinusoidal oscillation
The mathematical model of periodically amplitude and phase modulated sinusoidal oscillation is studied, and its Fourier spectrum is given analytically. The Fourier spectrum of the model explains the main features of the frequency spectrum of RR Lyrae stars showing light curve modulation called the Blazhko effect: among...
[ "astro-ph.SR" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
6491953
0906.4044
2009-06-22
Recommender Systems for the Conference Paper Assignment Problem
Conference paper assignment, i.e., the task of assigning paper submissions to reviewers, presents multi-faceted issues for recommender systems research. Besides the traditional goal of predicting `who likes what?', a conference management system must take into account aspects such as: reviewer capacity constraints, ade...
[ "cs.IR", "cs.AI" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
9175163
0906.4096
2009-06-22
An Event Based Approach To Situational Representation
Many application domains require representing interrelated real-world activities and/or evolving physical phenomena. In the crisis response domain, for instance, one may be interested in representing the state of the unfolding crisis (e.g., forest fire), the progress of the response activities such as evacuation and tr...
[ "cs.DB", "cs.AI" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "n ashish_0", "name": "Naveen Ashish", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "d kalashnikov_2", "name": "Dmitri [\"V.\"] Kalashnikov", "publication_history": null, "h_index": null, "num...
null
11907082
0906.3978
2009-06-22
Cosmic Cartography of the Large-Scale Structure with Sloan Digital Sky Survey Data Release 6
We present the largest Wiener reconstruction of the cosmic density field made to date. The reconstruction is based on the Sloan Digital Sky Survey data release 6 covering the northern Galactic cap. We use a novel supersampling algorithm to suppress aliasing effects and a Krylov-space inversion method to enable high per...
[ "astro-ph.CO" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[ { "corpus_id": "453973", "num_citations": null }, { "corpus_id": "7359203", "num_citations": null }, { "corpus_id": "6015658", "num_citations": null }, { "corpus_id": "15949151", "num_citations": null } ]
[ { "author_id": "f kitaura_1", "name": "Francisco-Shu Kitaura", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "j jasche_1", "name": "Jens Jasche", "publication_history": null, "h_index": null, "num_papers": nu...
null
7414293
0906.4026
2009-06-22
A Quantum-based Model for Interactive Information Retrieval (extended version)
Even the best information retrieval model cannot always identify the most useful answers to a user query. This is in particular the case with web search systems, where it is known that users tend to minimise their effort to access relevant information. It is, however, believed that the interaction between users and a r...
[ "cs.IR", "cs.DL" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "b piwowarski_1", "name": "Benjamin Piwowarski", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "m lalmas_1", "name": "Mounia Lalmas", "publication_history": null, "h_index": null, "num_papers":...
null
9181029
0906.3953
2009-06-22
Principal Fitted Components for Dimension Reduction in Regression
We provide a remedy for two concerns that have dogged the use of principal components in regression: (i) principal components are computed from the predictors alone and do not make apparent use of the response, and (ii) principal components are not invariant or equivariant under full rank linear transformation of the p...
[ "stat.ME" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
46079394
0906.4170
2009-06-23
Dynamical regimes and hydrodynamic lift of viscous vesicles under shear
The dynamics of two-dimensional viscous vesicles in shear flow, with different fluid viscosities $\eta_{\rm in}$ and $\eta_{\rm out}$ inside and outside, respectively, is studied using mesoscale simulation techniques. Besides the well-known tank-treading and tumbling motions, an oscillatory swinging motion is observed ...
[ "cond-mat.soft" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
119228452
0906.4318
2009-06-23
Constraining dust and color variations of high-z SNe using NICMOS on Hubble Space Telescope
We present data from the Supernova Cosmology Project for five high redshift Type Ia supernovae (SNe Ia) that were obtained using the NICMOS infrared camera on the Hubble Space Telescope. We add two SNe from this sample to a rest-frame I-band Hubble diagram, doubling the number of high redshift supernovae on this diagra...
[ "astro-ph.CO" ]
null
[ "target.author.publication_history" ]
[ { "corpus_id": "119080950", "num_citations": null }, { "corpus_id": "14575330", "num_citations": null }, { "corpus_id": "15646417", "num_citations": null }, { "corpus_id": "415318", "num_citations": null }, { "corpus_id": "7827882", "num_citations": null }, ...
[ { "author_id": "s nobili_1", "name": "Serena Nobili", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "v fadeyev_1", "name": "V. Fadeyev", "publication_history": null, "h_index": null, "num_papers": null, "...
null
18768610
0906.4365
2009-06-23
GJ 3236: a new bright, very low-mass eclipsing binary system discovered by the MEarth observatory
We report the detection of eclipses in GJ 3236, a bright (I = 11.6) very low mass binary system with an orbital period of 0.77 days. Analysis of light- and radial velocity curves of the system yielded component masses of 0.38 +/- 0.02 and 0.28 +/- 0.02 Msol. The central values for the stellar radii are larger than the ...
[ "astro-ph.SR" ]
null
[ "target.author.publication_history" ]
[ { "corpus_id": "118845964", "num_citations": null }, { "corpus_id": "7153912", "num_citations": null }, { "corpus_id": "2377717", "num_citations": null }, { "corpus_id": "3752277", "num_citations": null } ]
[ { "author_id": "j irwin_2", "name": "Jonathan [\"M.\"] Irwin", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "d charbonneau_1", "name": "David Charbonneau", "publication_history": null, "h_index": null, "num_...
null
15294193
0906.4101
2009-06-23
Precision cosmology with voids: definition, methods, dynamics
We propose a new definition of cosmic voids based on methods of Lagrangian orbit reconstruction as well as an algorithm to find them in actual data called DIVA. Our technique is intended to yield results which can be modeled sufficiently accurately to create a new probe of precision cosmology. We then develop an analyt...
[ "astro-ph.CO" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[ { "corpus_id": "15837031", "num_citations": null }, { "corpus_id": "17790488", "num_citations": null }, { "corpus_id": "3890", "num_citations": null }, { "corpus_id": "14739362", "num_citations": null }, { "corpus_id": "25094326", "num_citations": null } ]
[ { "author_id": "g lavaux_1", "name": "Guilhem Lavaux", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "b wandelt_1", "name": "Benjamin [\"D.\"] Wandelt", "publication_history": null, "h_index": null, "num_pape...
null
1814744
0906.4291
2009-06-23
The Pattern Matrix Method (Journal Version)
We develop a novel and powerful technique for communication lower bounds, the pattern matrix method. Specifically, fix an arbitrary function f:{0,1}^n->{0,1} and let A_f be the matrix whose columns are each an application of f to some subset of the variables x_1,x_2,...,x_{4n}. We prove that A_f has bounded-error commu...
[ "cs.CC", "quant-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
35714281
0906.4151
2009-06-23
Cosmography with the Einstein Telescope
Einstein Telescope (ET) is a 3rd generation gravitational-wave (GW) detector that is currently undergoing a design study. ET can detect millions of compact binary mergers up to redshifts 2-8. A small fraction of mergers might be observed in coincidence as gamma-ray bursts, helping to measure both the luminosity distanc...
[ "astro-ph.CO", "gr-qc" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "b sathyaprakash_1", "name": "Bangalore [\"S.\"] Sathyaprakash", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "b schutz_1", "name": "Bernard [\"F.\"] Schutz", "publication_history": null, "h_index...
null
16254932
0906.4320
2009-06-23
A Tentative Detection of a Starspot During Consecutive Transits of an Extrasolar Planet from the Ground: No Evidence of a Double Transiting Planet System Around TrES-1
There have been numerous reports of anomalies during transits of the planet TrES-1b. Recently, Rabus and coworkers' analysis of HST observations lead them to claim brightening anomalies during transit might be caused by either a second transiting planet or a cool starspot. Observations of two consecutive transits are p...
[ "astro-ph.EP" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
118040490
0906.4123
2009-06-23
Fisher Matrices and Confidence Ellipses: A Quick-Start Guide and Software
Fisher matrices are used frequently in the analysis of combining cosmological constraints from various data sets. They encode the Gaussian uncertainties of multiple variables. They are simple to use, and I show how to get up and running with them quickly. Python software is also provided. I cover how to obtain confiden...
[ "astro-ph.IM", "astro-ph.CO" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
9919996
0906.4325
2009-06-23
Finite element exterior calculus: from Hodge theory to numerical stability
This article reports on the confluence of two streams of research, one emanating from the fields of numerical analysis and scientific computation, the other from topology and geometry. In it we consider the numerical discretization of partial differential equations that are related to differential complexes so that de ...
[ "math.NA", "math.DG", "math.GT" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
18929664
0906.4556
2009-06-24
The zCOSMOS Redshift Survey: the role of environment and stellar mass in shaping the rise of the morphology-density relation from z~1
For more than two decades we have known that galaxy morphological segregation is present in the Local Universe. It is important to see how this relation evolves with cosmic time. To investigate how galaxy assembly took place with cosmic time, we explore the evolution of the morphology-density relation up to redshift z~...
[ "astro-ph.CO" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
299320
0906.4582
2009-06-24
On landmark selection and sampling in high-dimensional data analysis
In recent years, the spectral analysis of appropriately defined kernel matrices has emerged as a principled way to extract the low-dimensional structure often prevalent in high-dimensional data. Here we provide an introduction to spectral methods for linear and nonlinear dimension reduction, emphasizing ways to overcom...
[ "stat.ML", "cs.CV", "cs.LG" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
15604998
0906.4411
2009-06-24
Algorithmic Information Theory and Foundations of Probability
The use of algorithmic information theory (Kolmogorov complexity theory) to explain the relation between mathematical probability theory and `real world' is discussed.
[ "math.HO" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
955354
0906.4546
2009-06-24
S-particles at their naturalness limits
We draw attention on a particular configuration of supersymmetric particle masses, motivated by naturalness and flavour considerations. All its relevant phenomenological properties for the LHC are described in terms of a few physical parameters, irrespective of the underlying theoretical model. This allows a simple cha...
[ "hep-ph" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "r barbieri_1", "name": "Riccardo Barbieri", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "d pappadopulo_1", "name": "Duccio Pappadopulo", "publication_history": null, "h_index": null, "num_pa...
null
5239758
0906.4425
2009-06-24
On the power of a unique quantum witness
In a celebrated paper, Valiant and Vazirani raised the question of whether the difficulty of NP-complete problems was due to the wide variation of the number of witnesses of their instances. They gave a strong negative answer by showing that distinguishing between instances having zero or one witnesses is as hard as re...
[ "quant-ph" ]
null
[ "target.author.publication_history" ]
[ { "corpus_id": "3264730", "num_citations": null } ]
[ { "author_id": "r jain_7", "name": "Rahul Jain", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "i kerenidis_1", "name": "Iordanis Kerenidis", "publication_history": null, "h_index": null, "num_papers": null, ...
null
4651000
0906.4563
2009-06-24
On the Application of a Monolithic Array for Detecting Intensity-Correlated Photons Emitted by Different Source Types
It is not widely appreciated that many subtleties are involved in the accurate measurement of intensity-correlated photons; even for the original experiments of Hanbury Brown and Twiss (HBT). Using a monolithic 4x4 array of single-photon avalanche diodes (SPADs), together with an off-chip algorithm for processing strea...
[ "quant-ph" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "d boiko_1", "name": "Dmitri [\"L.\"] Boiko", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "n gunther_1", "name": "Neil [\"J.\"] Gunther", "publication_history": null, "h_index": null, "num_pa...
null
1045262
0906.4497
2009-06-24
Fill Radius and the Fundamental Group
In this note we relate the geometric notion of fill radius with the fundamental group of the manifold. We prove: ''Suppose that a closed Riemannian manifold M satisfies the property that its universal cover has bounded fill radius. Then the fundamental group of M is virtually free.'' We explain the relevance of this th...
[ "math.DG", "math.GT" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
16441180
0906.4387
2009-06-24
Sumset and inverse sumset theorems for Shannon entropy
Let $G = (G,+)$ be an additive group. The sumset theory of Pl\"unnecke and Ruzsa gives several relations between the size of sumsets $A+B$ of finite sets $A, B$, and related objects such as iterated sumsets $kA$ and difference sets $A-B$, while the inverse sumset theory of Freiman, Ruzsa, and others characterises those...
[ "math.CO", "math.PR" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
18851403
0906.4502
2009-06-24
Numerical Strategies for Stroke Optimization of Axisymmetric Microswimmers
We propose a computational method to solve optimal swimming problems, based on the boundary integral formulation of the hydrodynamic interaction between swimmer and surrounding fluid and direct constrained minimization of the energy consumed by the swimmer. We apply our method to axisymmetric model examples. We conside...
[ "math.NA", "math.OC" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[ { "corpus_id": "27500334", "num_citations": null } ]
[ { "author_id": "f alouges_1", "name": "Franccois Alouges", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "a desimone_1", "name": "Antonio DeSimone", "publication_history": null, "h_index": null, "num_papers":...
null
33168709
0906.4781
2009-06-25
Two-stage ordering of spins in a dipolar spin ice on the kagome lattice
Spin ice, a peculiar thermal state of a frustrated ferromagnet on the pyrochlore lattice, has a finite entropy density and excitations carrying magnetic charge. By combining analytical arguments and Monte Carlo simulations, we show that spin ice on the two-dimensional kagome lattice orders in two stages. The intermedia...
[ "cond-mat.str-el", "cond-mat.mtrl-sci" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "g chern_1", "name": "Gia-Wei Chern", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "p mellado_1", "name": "Paula Mellado", "publication_history": null, "h_index": null, "num_papers": null, ...
null
14106813
0906.4672
2009-06-25
Monodromies, Fluxes, and Compact Three-Generation F-theory GUTs
We analyze constraints for embedding local SU(5) F-theory GUTs into consistent compactifications and construct explicit three-generation models based on the geometry of arXiv:0904.3932. The key tool for studying constraints in this problem when there is an underlying E_8 structure is the spectral cover, which encodes a...
[ "hep-th" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
14259278
0906.4725
2009-06-25
Interacting Quantum Observables: Categorical Algebra and Diagrammatics
This paper has two tightly intertwined aims: (i) To introduce an intuitive and universal graphical calculus for multi-qubit systems, the ZX-calculus, which greatly simplifies derivations in the area of quantum computation and information. (ii) To axiomatise complementarity of quantum observables within a general framew...
[ "quant-ph", "cs.LO", "math.CT", "math.QA" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
266499549
1004.3153
2009-06-25
Hierarchical modularity in human brain functional networks
The idea that complex systems have a hierarchical modular organization originates in the early 1960s and has recently attracted fresh support from quantitative studies of large scale, real-life networks. Here we investigate the hierarchical modular (or "modules-within-modules") decomposition of human brain functional n...
[ "physics.data-an", "nlin.AO", "physics.bio-ph", "physics.soc-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
12569216
0906.4602
2009-06-25
Minimal Gr\"obner bases and the predictable leading monomial property
We focus on Gr\"obner bases for modules of univariate polynomial vectors over a ring. We identify a useful property, the "predictable leading monomial (PLM) property" that is shared by minimal Gr\"{o}bner bases of modules in F[x]^q, no matter what positional term order is used. The PLM property is useful in a range of ...
[ "cs.IT", "math.IT" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[ { "corpus_id": "1383089", "num_citations": null } ]
[ { "author_id": "m kuijper_1", "name": "Margreta Kuijper", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "k schindelar_0", "name": "Kristina Schindelar", "publication_history": null, "h_index": null, "num_pape...
null
2595478
0906.4779
2009-06-25
Minimum Probability Flow Learning
Fitting probabilistic models to data is often difficult, due to the general intractability of the partition function and its derivatives. Here we propose a new parameter estimation technique that does not require computing an intractable normalization factor or sampling from the equilibrium distribution of the model. T...
[ "cs.LG", "physics.data-an", "stat.ML" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[]
[ { "author_id": "j sohl-dickstein_1", "name": "Jascha [\"Narain\"] Sohl-Dickstein", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "p battaglino_1", "name": "Peter Battaglino", "publication_history": null, "h_index...
null
2669847
0906.4754
2009-06-25
Bayesian separation of spectral sources under non-negativity and full additivity constraints
This paper addresses the problem of separating spectral sources which are linearly mixed with unknown proportions. The main difficulty of the problem is to ensure the full additivity (sum-to-one) of the mixing coefficients and non-negativity of sources and mixing coefficients. A Bayesian estimation approach based on Ga...
[ "stat.ME" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[]
[ { "author_id": "n dobigeon_1", "name": "Nicolas Dobigeon", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "s moussaoui_1", "name": "Saïd Moussaoui", "publication_history": null, "h_index": null, "num_papers": ...
null
1529443
0906.4827
2009-06-25
Physical Layer Security: Coalitional Games for Distributed Cooperation
Cooperation between wireless network nodes is a promising technique for improving the physical layer security of wireless transmission, in terms of secrecy capacity, in the presence of multiple eavesdroppers. While existing physical layer security literature answered the question "what are the link-level secrecy capaci...
[ "cs.IT", "cs.GT", "math.IT" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "w saad_1", "name": "Walid Saad", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "z han_40", "name": "Zhu Han", "publication_history": null, "h_index": null, "num_papers": null, "num_citatio...
null
375984
0906.4692
2009-06-25
On optimally partitioning a text to improve its compression
In this paper we investigate the problem of partitioning an input string T in such a way that compressing individually its parts via a base-compressor C gets a compressed output that is shorter than applying C over the entire T at once. This problem was introduced in the context of table compression, and then further e...
[ "cs.DS", "cs.IT", "math.IT" ]
null
[ "target.author.publication_history" ]
[ { "corpus_id": "909458", "num_citations": null } ]
[ { "author_id": "p ferragina_1", "name": "Paolo Ferragina", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "i nitto_1", "name": "Igor Nitto", "publication_history": null, "h_index": null, "num_papers": null, ...
null
14835686
0906.4704
2009-06-25
The Structures of Distant Galaxies - IV: A New Empirical Measurement of the Time-Scale for Galaxy Mergers - Implications for the Merger History
Understanding the role of mergers in galaxy formation is one of the most outstanding problems in extragalactic astronomy. While we now have an idea for how the merger fraction evolves at redshifts z < 3, converting this merger fraction into merger rates, and therefore how many mergers an average galaxy undergoes during...
[ "astro-ph.GA" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
4372987
0906.4632
2009-06-25
Supersymmetry
The determination of supersymmetric parameters at the LHC in favorable as well as difficult scenarios is presented. If discovered and measured at the LHC and the ILC, supersymmetry may provide a link between collider physics and cosmology.
[ "hep-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
10163973
0906.4860
2009-06-26
Squeezing Components in Linear Quantum Feedback Networks
The aim of this paper is to extend linear quantum dynamical network theory to include static Bogoliubov components (such as squeezers). Within this integrated quantum network theory we provide general methods for cascade or series connections, as well as feedback interconnections using linear fractional transformations...
[ "quant-ph" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[ { "corpus_id": "16777", "num_citations": null } ]
[ { "author_id": "j gough_1", "name": "John [\"E.\"] Gough", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "m james_1", "name": "Matthew [\"R.\"] James", "publication_history": null, "h_index": null, "num_paper...
null
118653903
0906.4870
2009-06-26
Ground-state properties of the disordered Hubbard model in two dimensions
We study the interplay between electron correlation and disorder in the two-dimensional Hubbard model at half-filling by means of a variational wave function that can interpolate between Anderson and Mott insulators. We give a detailed description of our improved variational state and explain how the physics of the And...
[ "cond-mat.str-el" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
14318660
0906.4826
2009-06-26
Nested hierarchies in planar graphs
We construct a partial order relation which acts on the set of 3-cliques of a maximal planar graph G and defines a unique hierarchy. We demonstrate that G is the union of a set of special subgraphs, named `bubbles', that are themselves maximal planar graphs. The graph G is retrieved by connecting these bubbles in a tre...
[ "math.GT" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[]
[ { "author_id": "w song_21", "name": "Won-min Song", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "t matteo_1", "name": "Tiziana [\"di\"] Matteo", "publication_history": null, "h_index": null, "num_papers": n...
null
6393201
0906.4913
2009-06-26
Explicit Construction of Optimal Exact Regenerating Codes for Distributed Storage
Erasure coding techniques are used to increase the reliability of distributed storage systems while minimizing storage overhead. Also of interest is minimization of the bandwidth required to repair the system following a node failure. In a recent paper, Wu et al. characterize the tradeoff between the repair bandwidth a...
[ "cs.IT", "math.IT" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[]
[ { "author_id": "k rashmi_1", "name": "K. [\"V.\"] Rashmi", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "n shah_20", "name": "Nihar [\"B.\"] Shah", "publication_history": null, "h_index": null, "num_papers":...
null
25360237
0906.4805
2009-06-26
A Trivial Observation related to Sparse Recovery
We make a trivial modification to the elegant analysis of Garg and Khandekar (\emph{Gradient Descent with Sparsification} ICML 2009) that replaces the standard Restricted Isometry Property (RIP), with another RIP-type property (which could be simpler than the RIP, but we are not sure; it could be as hard as the RIP to ...
[ "cs.IT", "math.IT" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "s sra_1", "name": "Suvrit Sra", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null } ]
null
2363414
0906.4806
2009-06-26
Dynamical mass segregation on a very short timescale
We discuss the observations and theory of star cluster formation to argue that clusters form dynamically cool (subvirial) and with substructure. We then perform an ensemble of simulations of cool, clumpy (fractal) clusters and show that they often dynamically mass segregate on timescales far shorter than expected from ...
[ "astro-ph.GA" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
17150602
0906.4865
2009-06-26
Effective dynamics using conditional expectations
The question of coarse-graining is ubiquitous in molecular dynamics. In this article, we are interested in deriving effective properties for the dynamics of a coarse-grained variable $\xi(x)$, where $x$ describes the configuration of the system in a high-dimensional space $\R^n$, and $\xi$ is a smooth function with val...
[ "math.AP" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
23050181
0906.5044
2009-06-27
Hydrodynamics with Triangle Anomalies
We consider the hydrodynamic regime of theories with quantum anomalies for global currents. We show that a hitherto discarded term in the conserve current is not only allowed by symmetries, but is in fact required by triangle anomalies and the second law of thermodynamics. This term leads to a number of new effects, on...
[ "hep-th", "hep-ph", "nucl-th" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
14273363
0906.5110
2009-06-27
Statistical Analysis of Privacy and Anonymity Guarantees in Randomized Security Protocol Implementations
Security protocols often use randomization to achieve probabilistic non-determinism. This non-determinism, in turn, is used in obfuscating the dependence of observable values on secret data. Since the correctness of security protocols is very important, formal analysis of security protocols has been widely studied in l...
[ "cs.CR", "cs.LG" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "s jha_5", "name": "Susmit Jha", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null } ]
null
3115280
0906.5045
2009-06-27
Consistent estimation of non-bandlimited spectral density from uniformly spaced samples
In the matter of selection of sample time points for the estimation of the power spectral density of a continuous time stationary stochastic process, irregular sampling schemes such as Poisson sampling are often preferred over regular (uniform) sampling. A major reason for this preference is the well-known problem of i...
[ "math.ST", "stat.TH" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "r srivastava_1", "name": "Radhendushka Srivastava", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "d sengupta_4", "name": "Debasis Sengupta", "publication_history": null, "h_index": null, "num...
null
17103287
0906.5156
2009-06-28
Conformality or confinement: (IR)relevance of topological excitations
We study aspects of the conformality to confinement transition for non-supersymmetric Yang-Mills theories with fermions in arbitrary chiral or vectorlike representations. We use the presence or absence of mass gap for gauge fluctuations as an identifier of the infrared behavior. Present-day understanding does not allow...
[ "hep-th", "hep-lat", "hep-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
9062290
0906.5212
2009-06-29
An analysis of mixed integer linear sets based on lattice point free convex sets
Split cuts are cutting planes for mixed integer programs whose validity is derived from maximal lattice point free polyhedra of the form $S:=\{x : \pi_0 \leq \pi^T x \leq \pi_0+1 \}$ called split sets. The set obtained by adding all split cuts is called the split closure, and the split closure is known to be a polyhedr...
[ "math.OC" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
862793
0906.5325
2009-06-29
Online Reinforcement Learning for Dynamic Multimedia Systems
In our previous work, we proposed a systematic cross-layer framework for dynamic multimedia systems, which allows each layer to make autonomous and foresighted decisions that maximize the system's long-term performance, while meeting the application's real-time delay constraints. The proposed solution solved the cross-...
[ "cs.LG", "cs.MM" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[]
[ { "author_id": "n mastronarde_1", "name": "Nicholas Mastronarde", "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": nu...
null
11034770
0906.5263
2009-06-29
Multiple Hypothesis Testing in Pattern Discovery
The problem of multiple hypothesis testing arises when there are more than one hypothesis to be tested simultaneously for statistical significance. This is a very common situation in many data mining applications. For instance, assessing simultaneously the significance of all frequent itemsets of a single dataset entai...
[ "stat.ML", "stat.CO" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
43324521
0906.5355
2009-06-29
Exploring the Optical Transient Sky with the Palomar Transient Factory
The Palomar Transient Factory (PTF) is a wide-field experiment designed to investigate the optical transient and variable sky on time scales from minutes to years. PTF uses the CFH12k mosaic camera, with a field of view of 7.9 deg^2 and a plate scale of 1 asec/pixel, mounted on the the Palomar Observatory 48-inch Samue...
[ "astro-ph.CO", "astro-ph.GA" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[]
[ { "author_id": "a rau_2", "name": "Arne Rau", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "s kulkarni_9", "name": "Shrinivas [\"R.\"] Kulkarni", "publication_history": null, "h_index": null, "num_papers": n...
null
762160
0906.5290
2009-06-29
Existence of planar curves minimizing length and curvature
In this paper we consider the problem of reconstructing a curve that is partially hidden or corrupted by minimizing the functional $\int \sqrt{1+K_\gamma^2} ds$, depending both on length and curvature $K$. We fix starting and ending points as well as initial and final directions. For this functional we discuss the prob...
[ "math.DG", "math.OC" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
10246168
0906.5286
2009-06-29
Putting Recommendations on the Map -- Visualizing Clusters and Relations
For users, recommendations can sometimes seem odd or counterintuitive. Visualizing recommendations can remove some of this mystery, showing how a recommendation is grouped with other choices. A drawing can also lead a user's eye to other options. Traditional 2D-embeddings of points can be used to create a basic layout,...
[ "cs.IR" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "e gansner_1", "name": "Emden [\"R.\"] Gansner", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "y hu_53", "name": "Yifan Hu", "publication_history": null, "h_index": null, "num_papers": null, ...
null
7693111
0906.5368
2009-06-29
The Infrared Nuclear Emission of Seyfert Galaxies on Parsec Scales: Testing the Clumpy Torus models
We present subarcsecond resolution mid-infrared (mid-IR) photometry in the wavelength range from 8 to 20 micron of eighteen Seyfert galaxies, reporting high spatial resolution nuclear fluxes for the entire sample. We construct spectral energy distributions (SEDs) that the AGN dominates adding near-IR measurements from ...
[ "astro-ph.CO" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
16752721
0906.5304
2009-06-29
Galaxy Zoo : 'Hanny's Voorwerp', a quasar light echo?
We report the discovery of an unusual object near the spiral galaxy IC 2497, discovered by visual inspection of the Sloan Digital Sky Survey (SDSS) as part of the Galaxy Zoo project. The object, known as Hanny's Voorwerp, is bright in the SDSS g band due to unusually strong OIII 4959-5007 emission lines. We present the...
[ "astro-ph.CO" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
6224628
0906.5190
2009-06-29
High Dimensional Nonlinear Learning using Local Coordinate Coding
This paper introduces a new method for semi-supervised learning on high dimensional nonlinear manifolds, which includes a phase of unsupervised basis learning and a phase of supervised function learning. The learned bases provide a set of anchor points to form a local coordinate system, such that each data point $x$ on...
[ "stat.ML", "stat.ME" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
15281387
0906.5385
2009-06-29
Stochastic Calculus for a Time-changed Semimartingale and the Associated Stochastic Differential Equations
It is shown that under a certain condition on a semimartingale and a time-change, any stochastic integral driven by the time-changed semimartingale is a time-changed stochastic integral driven by the original semimartingale. As a direct consequence, a specialized form of the Ito formula is derived. When a standard Brow...
[ "math.PR" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null