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348223
cs/0606014
2006-06-02
On the Capacity of Multiple Access Channels with State Information and Feedback
In this paper, the multiple access channel (MAC) with channel state is analyzed in a scenario where a) the channel state is known non-causally to the transmitters and b) there is perfect causal feedback from the receiver to the transmitters. An achievable region and an outer bound are found for a discrete memoryless MA...
[ "cs.IT", "math.IT" ]
null
[ "target.author.publication_history" ]
[ { "corpus_id": "60796", "num_citations": null } ]
[ { "author_id": "w wu_68", "name": "Wei Wu", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "s vishwanath_2", "name": "Sriram Vishwanath", "publication_history": null, "h_index": null, "num_papers": null, "...
null
118903278
quant-ph/0606023
2006-06-02
Lower bounds for the fidelity of entangled state preparation
Estimating the fidelity of state preparation in multi-qubit systems is generally a time-consuming task. Nevertheless, this complexity can be reduced if the desired state can be characterized by certain symmetries measurable with the corresponding experimental setup. In this paper we give simple expressions to estimate ...
[ "quant-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
56054135
quant-ph/0606022
2006-06-02
Quantum Dynamics as an analog of Conditional Probability
Quantum theory can be regarded as a non-commutative generalization of classical probability. From this point of view, one expects quantum dynamics to be analogous to classical conditional probabilities. In this paper, a variant of the well-known isomorphism between completely positive maps and bipartite density operato...
[ "quant-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
14288830
math/0606073
2006-06-03
Gaussian marginals of convex bodies with symmetries
We prove Gaussian approximation theorems for specific $k$-dimensional marginals of convex bodies which possess certain symmetries. In particular, we treat bodies which possess a 1-unconditional basis, as well as simplices. Our results extend recent results for 1-dimensional marginals due to E. Meckes and the author.
[ "math.MG", "math.PR" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
1762307
astro-ph/0606076
2006-06-04
The Spin of the Near-Extreme Kerr Black Hole GRS 1915+105
Based on a spectral analysis of the X-ray continuum that employs a fully relativistic accretion-disk model, we conclude that the compact primary of the binary X-ray source GRS 1915+105 is a rapidly-rotating Kerr black hole. We find a lower limit on the dimensionless spin parameter of a* greater than 0.98. Our result is...
[ "astro-ph", "gr-qc" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
14717368
q-bio/0606005
2006-06-04
Triangular lattice neurons may implement an advanced numeral system to precisely encode rat position over large ranges
We argue by observation of the neural data that neurons in area dMEC of rats, which fire whenever the rat is on any vertex of a regular triangular lattice that tiles 2-d space, may be using an advanced numeral system to reversibly encode rat position. We interpret measured dMEC properties within the framework of a resi...
[ "q-bio.NC" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "y burak_1", "name": "Yoram Burak", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "t brookings_0", "name": "Ted Brookings", "publication_history": null, "h_index": null, "num_papers": null, ...
null
117119022
cond-mat/0606075
2006-06-05
Klein spin model ground states on general lattices
We prove that in short range Klein spin models on general lattices, all ground states are of the dimer type- each fundamental plaquette must host at least one singlet. These ground states are known to rigorously exhibit high dimensional fractionalization. When combined with a recent theorem, this establishes that Klein...
[ "cond-mat.str-el", "cond-mat.stat-mech" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "z nussinov_1", "name": "Zohar Nussinov", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null } ]
null
17201629
astro-ph/0606092
2006-06-05
Analysis of RR Lyrae Stars in the Northern Sky Variability Survey
We use data from the Northern Sky Variability Survey (NSVS), obtained from the first generation Robotic Optical Transient Search Experiment (ROTSE-I), to identify and study RR Lyrae variable stars in the solar neighborhood. We initially identified 1197 RRab (RR0) candidate stars brighter than the ROTSE median magnitude...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
17098189
astro-ph/0606080
2006-06-05
Multi-band study of NGC 7424 and its two newly-discovered ULXs
We have studied the face-on, barred spiral NGC 7424 (site of the rare Type IIb SN 2001ig) with Chandra, Gemini and the Australia Telescope Compact Array. After giving revised X-ray colours and luminosity of the supernova, here we focus on some other interesting sources in the galaxy: in particular, our serendipitous di...
[ "astro-ph" ]
null
[ "target.author.publication_history" ]
[ { "corpus_id": "16415818", "num_citations": null }, { "corpus_id": "15310621", "num_citations": null }, { "corpus_id": "118968800", "num_citations": null }, { "corpus_id": "18132819", "num_citations": null }, { "corpus_id": "14365007", "num_citations": null ...
[ { "author_id": "r soria_1", "name": "Roberto Soria", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "z kuncic_1", "name": "Zdenka Kuncic", "publication_history": null, "h_index": null, "num_papers": null, ...
null
18365246
cond-mat/0606122
2006-06-05
Characterizing the dynamical importance of network nodes and links
The largest eigenvalue of the adjacency matrix of the networks is a key quantity determining several important dynamical processes on complex networks. Based on this fact, we present a quantitative, objective characterization of the dynamical importance of network nodes and links in terms of their effect on the largest...
[ "cond-mat.dis-nn" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
12196045
cs/0606018
2006-06-05
Emerging Markets for RFID Traces
RFID tags are held to become ubiquitous in logistics in the near future, and item-level tagging will pave the way for Ubiquitous Computing, for example in application fields like smart homes. Our paper addresses the value and the production cost of information that can be gathered by observing these tags over time and ...
[ "cs.CY", "cs.CR" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "m bauer_4", "name": "Matthias Bauer", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "b fabian_1", "name": "Benjamin Fabian", "publication_history": null, "h_index": null, "num_papers": null, ...
null
15597361
astro-ph/0606088
2006-06-05
A re-analysis of the three-year WMAP temperature power spectrum and likelihood
We analyze the three-year WMAP temperature anisotropy data seeking to confirm the power spectrum and likelihoods published by the WMAP team. We apply five independent implementations of four algorithms to the power spectrum estimation and two implementations to the parameter estimation. Our single most important result...
[ "astro-ph" ]
null
[ "target.author.publication_history" ]
[ { "corpus_id": "119067661", "num_citations": null } ]
[ { "author_id": "h eriksen_1", "name": "Hans [\"Kristian\"] Eriksen", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "g huey_1", "name": "Greg Huey", "publication_history": null, "h_index": null, "num_papers": ...
null
5722428
math/0606143
2006-06-06
Correlation decay and deterministic FPTAS for counting list-colorings of a graph
We propose a deterministic algorithm for approximately counting the number of list colorings of a graph. Under the assumption that the graph is triangle free, the size of every list is at least $\alpha \Delta$, where $\alpha$ is an arbitrary constant bigger than $\alpha^{**}=2.8432...$, and $\Delta$ is the maximum degr...
[ "math.CO", "math.PR" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[]
[ { "author_id": "d gamarnik_1", "name": "David Gamarnik", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "d katz_1", "name": "Dmitriy [\"A.\"] Katz", "publication_history": null, "h_index": null, "num_papers": ...
null
42450566
astro-ph/0606126
2006-06-06
Search for Diffuse Astrophysical Neutrino Flux Using Ultra-High-Energy Upward-Going Muons in Super-Kamiokande I
Many astrophysical models predict a diffuse flux of high-energy neutrinos from active galactic nuclei and other extra-galactic sources. At muon energies above 1 TeV, the upward-going muon flux induced by neutrinos from active galactic nuclei is expected to exceed the flux due to atmospheric neutrinos. We have performed...
[ "astro-ph", "hep-ex" ]
null
[ "target.author.publication_history" ]
[ { "corpus_id": "56029904", "num_citations": null }, { "corpus_id": "119335143", "num_citations": null } ]
[ { "author_id": "m swanson_1", "name": "Mollye [\"E.\",\"C.\"] Swanson", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "k abe_4", "name": "Koya Abe", "publication_history": null, "h_index": null, "num_papers":...
null
2422882
cond-mat/0606141
2006-06-06
Fluctuation theorem for the effusion of an ideal gas
The probability distribution of the entropy production for the effusion of an ideal gas between two compartments is calculated explicitly. The fluctuation theorem is verified. The analytic results are in good agreement with numerical data from hard disk molecular dynamics simulations.
[ "cond-mat.stat-mech" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "b cleuren_1", "name": "Bart Cleuren", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "c broeck_1", "name": "Chris [\"Van\",\"Den\"] Broeck", "publication_history": null, "h_index": null, "num_p...
null
18905794
cond-mat/0606180
2006-06-07
Temperature and Disorder Chaos in Three-Dimensional Ising Spin Glasses
We study the effects of small temperature as well as disorder perturbations on the equilibrium state of three-dimensional Ising spin glasses via an alternate scaling ansatz. By using Monte Carlo simulations, we show that temperature and disorder perturbations yield chaotic changes in the equilibrium state and that temp...
[ "cond-mat.dis-nn" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "h katzgraber_1", "name": "Helmut [\"G.\"] Katzgraber", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "f krzakala_1", "name": "Florent Krzakala", "publication_history": null, "h_index": null, "...
null
8169417
q-bio/0606006
2006-06-07
Spatially Distributed Stochastic Systems: equation-free and equation-assisted preconditioned computation
Spatially distributed problems are often approximately modelled in terms of partial differential equations (PDEs) for appropriate coarse-grained quantities (e.g. concentrations). The derivation of accurate such PDEs starting from finer scale, atomistic models, and using suitable averaging, is often a challenging task; ...
[ "q-bio.QM", "physics.comp-ph", "quant-ph" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "l qiao_7", "name": "Liang Qiao", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "r erban_1", "name": "Radek Erban", "publication_history": null, "h_index": null, "num_papers": null, "num_ci...
null
41586081
astro-ph/0606140
2006-06-07
Effects of a Supermassive Black Hole Binary on a Nuclear Gas Disk
We study influence of a galactic central supermassive black hole (SMBH) binary on gas dynamics and star formation activity in a nuclear gas disk by making three-dimensional Tree+SPH simulations. Due to orbital motions of SMBHs, there are various resonances between gas motion and the SMBH binary motion. We have shown th...
[ "astro-ph" ]
null
[ "target.author.publication_history" ]
[ { "corpus_id": "14478638", "num_citations": null }, { "corpus_id": "15128087", "num_citations": null } ]
[ { "author_id": "h matsui_1", "name": "Hidenori Matsui", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "a habe_1", "name": "Asao Habe", "publication_history": null, "h_index": null, "num_papers": null, "nu...
null
261976161
astro-ph/0606175
2006-06-07
The James Webb Space Telescope
The James Webb Space Telescope (JWST) is a large (6.6m), cold (50K), infrared-optimized space observatory that will be launched early in the next decade. The observatory will have four instruments: a near-infrared camera, a near-infrared multi-object spectrograph, and a tunable filter imager will cover the wavelength r...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
18561804
astro-ph/0606170
2006-06-07
K-corrections and filter transformations in the ultraviolet, optical, and near infrared
Template fits to observed galaxy fluxes allow calculation of K-corrections and conversions among observations of galaxies at various wavelengths. We present a method for creating model-based template sets given a set of heterogeneous photometric and spectroscopic galaxy data. Our technique, non-negative matrix factoriz...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
119458249
astro-ph/0606138
2006-06-07
First results from SAPAC: towards a 3D-picture of the Fornax cluster core
A sophisticated SBF analysis package has been developed, designed to measure distances of early-type galaxies by means of surface brightness fluctuations of unresolved stars. This suite of programs called SAPAC is made readily available to the astronomical community for extensive testing with the long-term goal to prov...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
15249764
math/0606172
2006-06-08
Transport in the One-Dimensional Schroedinger Equation
We prove a dispersive estimate for the one-dimensional Schroedinger equation, mapping between weighted $L^p$ spaces with stronger time-decay ($t^{-3/2}$ versus $t^{-1/2}$) than is possible on unweighted spaces. To satisfy this bound, the long-term behavior of solutions must include transport away from the origin. Our p...
[ "math.AP" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
118978548
cond-mat/0606203
2006-06-08
Entropy of solid He4: the possible role of a dislocation glass
Solid He4 is viewed as a nearly perfect Debye solid. Yet, recent calorimetry indicates that its low-temperature specific heat has both cubic and linear contributions. These features appear in the same temperature range ($T \sim 200$ mK) where measurements of the torsional oscillator period suggest a supersolid transiti...
[ "cond-mat.supr-con", "cond-mat.dis-nn" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "a balatsky_1", "name": "Alexander [\"Vladimirovich\"] Balatsky", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "m graf_1", "name": "Matthias [\"J.\"] Graf", "publication_history": null, "h_index":...
null
8209527
q-bio/0607034
2006-06-08
Nonoptimal Component Placement, but Short Processing Paths, due to Long-Distance Projections in Neural Systems
It has been suggested that neural systems across several scales of organization show optimal component placement, in which any spatial rearrangement of the components would lead to an increase of total wiring. Using extensive connectivity datasets for diverse neural networks combined with spatial coordinates for networ...
[ "q-bio.NC", "cond-mat.stat-mech" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
14923369
astro-ph/0606185
2006-06-08
Velocity-Metallicity Correlation for high-z DLA Galaxies: Evidence for a Mass-Metallicity Relation?
We used our database of VLT-UVES quasar spectra to build up a sample of 70 Damped Lyman-alpha (DLA) or strong sub-DLA systems with total neutral hydrogen column densities of log N(HI)>20 and redshifts in the range 1.7<z_abs<4.3. For each of the systems, we measured in an homogeneous manner the metallicities relative to...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
8020510
cs/0606037
2006-06-08
Average-Case Complexity
We survey the average-case complexity of problems in NP. We discuss various notions of good-on-average algorithms, and present completeness results due to Impagliazzo and Levin. Such completeness results establish the fact that if a certain specific (but somewhat artificial) NP problem is easy-on-average with respect t...
[ "cs.CC" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
18075537
math/0606181
2006-06-08
Truels, or the survival of the weakest
In this paper we review some of the main results obtained in the field of truels. A "truel" is a generalization of a duel involving three players. Depending on the rules used for chosing the players, we may distinguish between the random, sequential and simultaneous truel. A paradoxical result appears in these games, a...
[ "math.PR", "cond-mat.stat-mech" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "p amengual_1", "name": "Pau Amengual", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "r toral_1", "name": "Raúl Toral", "publication_history": null, "h_index": null, "num_papers": null, "n...
null
13723228
cond-mat/0606211
2006-06-08
Thermodynamic formalism for systems with Markov dynamics
The thermodynamic formalism allows one to access the chaotic properties of equilibrium and out-of-equilibrium systems, by deriving those from a dynamical partition function. The definition that has been given for this partition function within the framework of discrete time Markov chains was not suitable for continuous...
[ "cond-mat.stat-mech", "cond-mat.dis-nn", "math-ph", "math.MP", "nlin.CD" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
119425804
quant-ph/0606090
2006-06-09
Entanglement purification protocols for all graph states
We present multiparty entanglement purification protocols that are capable of purifying arbitrary graph states directly. We develop recurrence and breeding protocols and compare our methods with strategies based on bipartite entanglement purification in static and communication scenarios. We find that direct multiparty...
[ "quant-ph" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "c kruszynska_1", "name": "Caroline Kruszynska", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "a miyake_1", "name": "Akimasa Miyake", "publication_history": null, "h_index": null, "num_papers"...
null
13277885
cs/0606042
2006-06-09
Enabling user-driven Checkpointing strategies in Reverse-mode Automatic Differentiation
This paper presents a new functionality of the Automatic Differentiation (AD) tool Tapenade. Tapenade generates adjoint codes which are widely used for optimization or inverse problems. Unfortunately, for large applications the adjoint code demands a great deal of memory, because it needs to store a large set of interm...
[ "cs.DS" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[]
[ { "author_id": "l hascoët_1", "name": "Laurent Hascoët", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "m araya-polo_1", "name": "Mauricio Araya-Polo", "publication_history": null, "h_index": null, "num_paper...
null
13318924
math/0606206
2006-06-09
Decentralized adaptation in interconnected uncertain systems with nonlinear parametrization
We propose a technique for the design and analysis of decentralized adaptation algorithms in interconnected dynamical systems. Our technique does not require Lyapunov stability of the target dynamics and allows nonlinearly parameterized uncertainties. We show that for the considered class of systems, conditions for rea...
[ "math.OC", "math.DS" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "i tyukin_1", "name": "Ivan [\"Y.\"] Tyukin", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "c leeuwen_1", "name": "C. [\"C.\",\"van\"] Leeuwen", "publication_history": null, "h_index": null, "...
null
17492910
astro-ph/0606227
2006-06-09
Probing cosmological parameters with the CMB: Forecasts from full Monte Carlo simulations
The Fisher matrix formalism has in recent times become the standard method for predicting the precision with which various cosmological parameters can be extracted from future data. This approach is fast, and generally returns accurate estimates for the parameter errors when the individual parameter likelihoods approxi...
[ "astro-ph", "gr-qc", "hep-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
668871
math/0606219
2006-06-09
Significant edges in the case of a non-stationary Gaussian noise
In this paper, we propose an edge detection technique based on some local smoothing of the image followed by a statistical hypothesis testing on the gradient. An edge point being defined as a zero-crossing of the Laplacian, it is said to be a significant edge point if the gradient at this point is larger than a thresho...
[ "math.ST", "math.PR", "stat.TH" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "i abraham_3", "name": "Isabelle Abraham", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "r abraham_2", "name": "Romain Abraham", "publication_history": null, "h_index": null, "num_papers": nul...
null
269614691
cs/0606044
2006-06-09
Frugality ratios and improved truthful mechanisms for vertex cover
In {\em set-system auctions}, there are several overlapping teams of agents, and a task that can be completed by any of these teams. The buyer's goal is to hire a team and pay as little as possible. Recently, Karlin, Kempe and Tamir introduced a new definition of {\em frugality ratio} for this setting. Informally, the ...
[ "cs.GT" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "e elkind_1", "name": "Edith Elkind", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "l goldberg_1", "name": "Leslie [\"Ann\"] Goldberg", "publication_history": null, "h_index": null, "num_paper...
null
119074147
quant-ph/0606094
2006-06-10
Quantum walks with infinite hitting times
Hitting times are the average time it takes a walk to reach a given final vertex from a given starting vertex. The hitting time for a classical random walk on a connected graph will always be finite. We show that, by contrast, quantum walks can have infinite hitting times for some initial states. We seek criteria to de...
[ "quant-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
11387410
hep-th/0606096
2006-06-10
Quasi-normal Modes of Electromagnetic Perturbations of Four-Dimensional Topological Black Holes with Scalar Hair
We study the perturbative behaviour of topological black holes with scalar hair. We calculate both analytically and numerically the quasi-normal modes of the electromagnetic perturbations. In the case of small black holes we find evidence of a second-order phase transition of a topological black hole to a hairy configu...
[ "hep-th", "gr-qc" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "g koutsoumbas_1", "name": "George Koutsoumbas", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "s musiri_1", "name": "Suphot Musiri", "publication_history": null, "h_index": null, "num_papers":...
null
12152062
hep-th/0606109
2006-06-12
The landscape of intersecting brane models
We develop tools for analyzing the space of intersecting brane models. We apply these tools to a particular T^6/Z_2^2 orientifold which has been used for model building. We prove that there are a finite number of intersecting brane models on this orientifold which satisfy the Diophantine equations coming from supersymm...
[ "hep-th" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
6786481
cs/0606054
2006-06-12
Threshold-Controlled Global Cascading in Wireless Sensor Networks
We investigate cascade dynamics in threshold-controlled (multiplex) propagation on random geometric networks. We find that such local dynamics can serve as an efficient, robust, and reliable prototypical activation protocol in sensor networks in responding to various alarm scenarios. We also consider the same dynamics ...
[ "cs.NI" ]
null
[ "target.author.publication_history" ]
[ { "corpus_id": "298404", "num_citations": null } ]
[ { "author_id": "q lu_3", "name": "Qiming Lu", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "g korniss_1", "name": "Gyorgy Korniss", "publication_history": null, "h_index": null, "num_papers": null, "num_...
null
36948193
nlin/0606032
2006-06-12
Chaotic dynamics of resting ventilatory flow in humans assessed through noise titration
The mammalian ventilatory behavior exhibits nonlinear dynamics as reflected by certain nonlinearity or complexity indicators (e.g. correlation dimension, approximate entropy, Lyapunov exponents...) but this is not sufficient to determine its possible chaotic nature. To address this, we applied the noise titration techn...
[ "nlin.CD" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
201208
cs/0606052
2006-06-12
Topology for Distributed Inference on Graphs
Let $N$ local decision makers in a sensor network communicate with their neighbors to reach a decision \emph{consensus}. Communication is local, among neighboring sensors only, through noiseless or noisy links. We study the design of the network topology that optimizes the rate of convergence of the iterative decision ...
[ "cs.IT", "math.IT" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[]
[ { "author_id": "s kar_1", "name": "Soummya Kar", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "s aldosari_0", "name": "Saeed [\"A.\"] Aldosari", "publication_history": null, "h_index": null, "num_papers": nu...
null
2712050
q-bio/0606013
2006-06-12
Nested Canalyzing, unate cascade, and polynomial functions
This paper focuses on the study of certain classes of Boolean functions that have appeared in several different contexts. Nested canalyzing functions have been studied recently in the context of Boolean network models of gene regulatory networks. In the same context, polynomial functions over finite fields have been us...
[ "q-bio.QM", "math.AC" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
119512074
cond-mat/0606326
2006-06-13
Coarse Molecular-Dynamics Determination of the Onset of Structural Transitions: Melting of Crystalline Solids
Using a coarse molecular-dynamics (CMD) approach with an appropriate choice of coarse variable (order parameter), we map the underlying effective free-energy landscape for the melting of a crystalline solid. Implementation of this approach provides a means for constructing effective free-energy landscapes of structural...
[ "cond-mat.mtrl-sci" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "m amat_1", "name": "Miguel [\"A.\"] Amat", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "i kevrekidis_1", "name": "Ioannis [\"G.\"] Kevrekidis", "publication_history": null, "h_index": null, ...
null
28828906
astro-ph/0606331
2006-06-13
A search for binary systems among the nearest L dwarfs
We have used the NICMOS NIC1 camera on the Hubble Space Telescope to obtain high angular resolution images of 51 ultracool dwarfs in the immediate Solar Neighbourhood. Nine systems are resolved as binary, with component separations from 1.5 and 15 AU. All of the systems have components with similar luminosities, and, c...
[ "astro-ph" ]
null
[ "target.author.publication_history" ]
[ { "corpus_id": "12310839", "num_citations": null }, { "corpus_id": "119445748", "num_citations": null }, { "corpus_id": "16667852", "num_citations": null }, { "corpus_id": "11027621", "num_citations": null }, { "corpus_id": "19768508", "num_citations": null ...
[ { "author_id": "i reid_1", "name": "I. [\"Neill\"] Reid", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "e lewitus_0", "name": "Eric Lewitus", "publication_history": null, "h_index": null, "num_papers": null,...
null
14217174
math/0606305
2006-06-13
Shadow systems and volume of polar convex bodies
We prove that the reciprocal of the volume of the polar bodies, about the Santal\'o point, of a {\em shadow system} of convex bodies $K_t$, is a convex function of $t$. Thus extending to the non-symmetric case a result of Campi and Gronchi. The case that the reciprocal of the volume is an affine function of $t$ is also...
[ "math.MG", "math.FA" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
15295671
astro-ph/0606327
2006-06-13
Kinematics of the ultra-compact helium accretor AM Canum Venaticorum
We report on the results from a five-night campaign of high-speed spectroscopy of the 17-minute binary AM Canum Venaticorum, obtained with the 4.2-m William Herschel Telescope on La Palma. We derive a mass ratio q=0.18+/-0.01 for AM CVn, which is significantly higher than the value found in previous, less direct measur...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
117655796
math/0606320
2006-06-13
Remarks on the Cayley Representation of Orthogonal Matrices and on Perturbing the Diagonal of a Matrix to Make it Invertible
This note contains two remarks. The first remark concerns the extension of the well-known Cayley representation of rotation matrices by skew symmetric matrices to rotation matrices admitting -1 as an eigenvalue and then to all orthogonal matrices. We review a method due to Hermann Weyl and another method involving mult...
[ "math.NA", "math.GM" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
119080494
astro-ph/0606338
2006-06-14
SCUBA-2: a 10,000 pixel submillimeter camera for the James Clerk Maxwell Telescope
SCUBA-2 is an innovative 10,000 pixel submillimeter camera due to be delivered to the James Clerk Maxwell Telescope in late 2006. The camera is expected to revolutionize submillimeter astronomy in terms of the ability to carry out wide-field surveys to unprecedented depths addressing key questions relating to the origi...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
839228
cs/0606069
2006-06-14
Inference and Evaluation of the Multinomial Mixture Model for Text Clustering
In this article, we investigate the use of a probabilistic model for unsupervised clustering in text collections. Unsupervised clustering has become a basic module for many intelligent text processing applications, such as information retrieval, text classification or information extraction. The model considered in thi...
[ "cs.IR", "cs.CL" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "l rigouste_0", "name": "Loïs Rigouste", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "o cappé_1", "name": "Olivier Cappé", "publication_history": null, "h_index": null, "num_papers": null, ...
null
119417042
astro-ph/0606352
2006-06-14
X-ray Properties of Black-Hole Binaries
We review the properties and behavior X-ray binaries that contain an accreting black hole. The larger majority of such systems are X-ray transients, and many of them were observed in daily pointings with RXTE throughout the course of their outbursts. The complex evolution of these sources is described in terms of commo...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
18028507
astro-ph/0606349
2006-06-14
Long Term Evolution of Close Planets Including the Effects of Secular Interactions
This paper studies the long term evolution of planetary systems containing short-period planets, including the effects of tidal circularization, secular excitation of eccentricity by companion planets, and stellar damping. For planetary systems subject to all of these effects, analytic solutions (or approximations) are...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
42111035
astro-ph/0606348
2006-06-14
Making sky maps from Planck data
We compare the performance of multiple codes written by different groups for making polarized maps from Planck-sized, all-sky cosmic microwave background (CMB) data. Three of the codes are based on a destriping algorithm; the other three are implementations of an optimal maximum-likelihood algorithm. Time-ordered data ...
[ "astro-ph" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[ { "corpus_id": "6524641", "num_citations": null }, { "corpus_id": "12607613", "num_citations": null } ]
[ { "author_id": "m ashdown_1", "name": "Mark Ashdown", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "c baccigalupi_1", "name": "Carlo Baccigalupi", "publication_history": null, "h_index": null, "num_papers": ...
null
119086637
hep-th/0606130
2006-06-14
Electrically charged black hole with scalar hair
An electrically charged black hole solution with scalar hair in four dimensions is presented. The self-interacting scalar field is real and it is minimally coupled to gravity and electromagnetism. The event horizon is a surface of negative constant curvature and the asymptotic region is locally an AdS spacetime. The as...
[ "hep-th", "gr-qc" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
45384182
quant-ph/0606128
2006-06-15
How to observe a coherent superposition of an atom and a molecule
We demonstrate that it is possible, in principle, to perform a Ramsey-type interference experiment to exhibit a coherent superposition of a single atom and a diatomic molecule. This gedanken experiment, based on the techniques of Aharonov and Susskind [Phys. Rev. 155, 1428 (1967)], explicitly violates the commonly-acce...
[ "quant-ph", "cond-mat.other" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "m dowling_3", "name": "Mark [\"R.\"] Dowling", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "s bartlett_1", "name": "Stephen [\"D.\"] Bartlett", "publication_history": null, "h_index": null, ...
null
17014987
physics/0606132
2006-06-15
Modeling the Co-occurrence Principles of the Consonant Inventories: A Complex Network Approach
Speech sounds of the languages all over the world show remarkable patterns of cooccurrence. In this work, we attempt to automatically capture the patterns of cooccurrence of the consonants across languages and at the same time figure out the nature of the force leading to the emergence of such patterns. For this purpos...
[ "physics.soc-ph" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[]
[ { "author_id": "a mukherjee_13", "name": "Animesh Mukherjee", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "m choudhury_1", "name": "Monojit Choudhury", "publication_history": null, "h_index": null, "num_pap...
null
12549721
hep-th/0606141
2006-06-15
Holographic representation of local bulk operators
The Lorentzian AdS/CFT correspondence implies a map between local operators in supergravity and non-local operators in the CFT. By explicit computation we construct CFT operators which are dual to local bulk fields in the semiclassical limit. The computation is done for general dimension in global, Poincare and Rindler...
[ "hep-th" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
119510442
astro-ph/0606413
2006-06-16
High energy neutrino astronomy using upward-going muons in Super-Kamiokande-I
We present the results from several studies used to search for astrophysical sources of high-energy neutrinos using the Super-Kamiokande-I (April 1996 to July 2001) neutrino-induced upward-going muon data. The data set consists of 2359 events with minimum energy 1.6 GeV, of which 1892 are through-going and 467 stop wit...
[ "astro-ph", "hep-ex" ]
null
[ "target.author.publication_history" ]
[ { "corpus_id": "119346336", "num_citations": null }, { "corpus_id": "236327578", "num_citations": null }, { "corpus_id": "17177392", "num_citations": null }, { "corpus_id": "10217644", "num_citations": null }, { "corpus_id": "11981382", "num_citations": null ...
[ { "author_id": "k abe_5", "name": "K. Abe", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "j hosaka_1", "name": "J. Hosaka", "publication_history": null, "h_index": null, "num_papers": null, "num_citation...
null
100235
q-bio/0606021
2006-06-16
Heterogeneous animal group models and their group-level alignment dynamics; an equation-free approach
We study coarse-grained (group-level) alignment dynamics of individual-based animal group models for {\it heterogeneous} populations consisting of informed (on preferred directions) and uninformed individuals. The orientation of each individual is characterized by an angle, whose dynamics are nonlinearly coupled with t...
[ "q-bio.QM", "q-bio.PE" ]
null
[ "target.author.publication_history" ]
[ { "corpus_id": "13074080", "num_citations": null } ]
[ { "author_id": "s moon_4", "name": "Sung [\"Joon\"] Moon", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "b nabet_1", "name": "Benjamin Nabet", "publication_history": null, "h_index": null, "num_papers": null...
null
38409083
cond-mat/0606439
2006-06-16
An efficient sampling algorithm for Variational Monte Carlo
We propose a new algorithm for sampling the $N$-body density $|\Psi({\bf R})|^2/\int_{\mathbb{R}^{3N}} |\Psi|^2$ in the Variational Monte Carlo (VMC) framework. This algorithm is based upon a modified Ricci-Ciccotti discretization of the Langevin dynamics in the phase space $({\bf R},{\bf P})$ improved by a Metropolis ...
[ "cond-mat.other" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
18659593
math/0606389
2006-06-16
Optimal gradient estimates and asymptotic behaviour for the Vlasov-Poisson system with small initial data
The Vlasov-Poisson system describes interacting systems of collisionless particles. For solutions with small initial data in three dimensions it is known that the spatial density of particles decays like $t^{-3}$ at late times. In this paper this statement is refined to show that each derivative of the density which is...
[ "math.AP" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "h hwang_4", "name": "Hyung [\"Ju\"] Hwang", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "a rendall_0", "name": "Alan [\"D.\"] Rendall", "publication_history": null, "h_index": null, "num_pap...
null
2588399
quant-ph/0606138
2006-06-16
Grothendieck's constant and local models for noisy entangled quantum states
We relate the nonlocal properties of noisy entangled states to Grothendieck's constant, a mathematical constant appearing in Banach space theory. For two-qubit Werner states $\rho^W_p=p \proj{\psi^-}+(1-p){\one}/{4}$, we show that there is a local model for projective measurements if and only if $p \le 1/K_G(3)$, where...
[ "quant-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
119399524
physics/0606152
2006-06-16
Kuzmin-Osledets Formulations of Compressible Euler Equations
Kuzmin-Oseledets formulations of compressible Euler equations case are considered. Exact results and physical interpretations are given. One such exact result for the compressible barotropic case is the potential helicity Lagrange invariant. In recognition of the fundamental physical implications of this Lagrange invar...
[ "physics.flu-dyn" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "b shivamoggi_0", "name": "Bhimsen Shivamoggi", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "s kurien_1", "name": "Susan Kurien", "publication_history": null, "h_index": null, "num_papers": n...
null
20506531
astro-ph/0606418
2006-06-16
A weak lensing estimate from GEMS of the virial to stellar mass ratio in massive galaxies to z~0.8
We present constraints on the evolution of the virial to stellar mass ratio of galaxies with high stellar masses in the redshift range 0.2<z<0.8, by comparing weak lensing measurements of virial mass M_vir to estimates of stellar mass M_star from COMBO-17. For a complete sample of galaxies with log(M_star/ M_\odot) > 1...
[ "astro-ph" ]
null
[ "target.author.publication_history" ]
[ { "corpus_id": "119420304", "num_citations": null }, { "corpus_id": "119386771", "num_citations": null }, { "corpus_id": "321827", "num_citations": null }, { "corpus_id": "119328631", "num_citations": null } ]
[ { "author_id": "c heymans_1", "name": "Catherine Heymans", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "e bell_2", "name": "Eric [\"F.\"] Bell", "publication_history": null, "h_index": null, "num_papers": n...
null
14695919
astro-ph/0606416
2006-06-17
Probing dark energy with the shear-ratio geometric test
We adapt the Jain--Taylor (2003) shear-ratio geometric lensing method to measure the dark energy equation of state, and its time derivative from dark matter haloes in cosmologies with arbitrary spatial curvature. The full shear-ratio covariance matrix is calculated for lensed sources, including the intervening large-sc...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
14278486
q-bio/0606024
2006-06-17
Bistable equilibrium points of mercury body burden
In the last century mercury levels in the global environment have tripled as a result of increased pollution from industrial, occupational, medicinal and domestic uses \cite{BaMe03}. Glutathione is known to be the main agent responsible for the excretion of mercury (we refer to \cite{Thim05}, \cite{ZalBar99} and \cite{...
[ "q-bio.OT" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "h owhadi_1", "name": "Houman Owhadi", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "a boulos_0", "name": "Areen Boulos", "publication_history": null, "h_index": null, "num_papers": null, ...
null
17234001
math/0606414
2006-06-17
The Rank of Random Graphs
We show that almost surely the rank of the adjacency matrix of the Erd\"os-R\'enyi random graph $G(n,p)$ equals the number of non-isolated vertices for any $c\ln n/n<p<1/2$, where $c$ is an arbitrary positive constant larger than 1/2. In particular, the giant component (a.s.) has full rank in this range.
[ "math.PR", "math.CO" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
31779199
astro-ph/0606432
2006-06-18
Spitzer/IRAC Photometry of M, L, and T Dwarfs
We present the results of a program to acquire photometry for eighty-six late-M, L, and T dwarfs using the Infrared Array Camera (IRAC) on the Spitzer Space Telescope. We examine the behavior of these cool dwarfs in various color-color and color-magnitude diagrams composed of near-IR and IRAC data. The T dwarfs exhibit...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
16325617
math/0606441
2006-06-19
Classifier Technology and the Illusion of Progress
A great many tools have been developed for supervised classification, ranging from early methods such as linear discriminant analysis through to modern developments such as neural networks and support vector machines. A large number of comparative studies have been conducted in attempts to establish the relative superi...
[ "math.ST", "stat.TH" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
12503259
astro-ph/0606449
2006-06-19
Secondary Maximum in the Near-Infrared Lightcurves of Type Ia Supernovae
We undertake a theoretical study of the near-infrared (NIR) lightcurves of Type Ia supernovae (SNe Ia). In these bands, the lightcurves are distinguished by a secondary maximum occurring roughly 20 to 30 days after the initial one. Using time-dependent multi-group radiative transfer calculations, we calculate the UBVRI...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
16814669
cond-mat/0606465
2006-06-19
Heat transport in harmonic lattices
We work out the non-equilibrium steady state properties of a harmonic lattice which is connected to heat reservoirs at different temperatures. The heat reservoirs are themselves modeled as harmonic systems. Our approach is to write quantum Langevin equations for the system and solve these to obtain steady state propert...
[ "cond-mat.mes-hall", "cond-mat.stat-mech" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
15061132
cs/0606083
2006-06-19
The Diversity Order of the Semidefinite Relaxation Detector
We consider the detection of binary (antipodal) signals transmitted in a spatially multiplexed fashion over a fading multiple-input multiple-output (MIMO) channel and where the detection is done by means of semidefinite relaxation (SDR). The SDR detector is an attractive alternative to maximum likelihood (ML) detection...
[ "cs.IT", "math.IT" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
15395519
astro-ph/0606445
2006-06-19
[CI] 492 GHz mapping toward Cas A
We have mapped the [C I] emission at 492 GHz toward the supernova remnant Cas A. We detect [C I] emission from the periphery of the diffuse Photon Dominated Region (PDR) covering the disk of Cas A, as traced by the carbon recombination lines, as well as from the denser PDRs associated with the molecular clouds towards ...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
119085482
astro-ph/0606440
2006-06-19
The GALEX Ultraviolet Atlas of Nearby Galaxies
We present images, integrated photometry, surface-brightness and color profiles for a total of 1034 nearby galaxies recently observed by the GALEX satellite in its far-ultraviolet (FUV; 1516A) and near-ultraviolet (NUV; 2267A) bands. (...) This data set has been complemented with archival optical, near-infrared, and fa...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
18729817
astro-ph/0606438
2006-06-19
XMM and Chandra measurements of the AGN intrinsic absorption: dependence on luminosity and redshift
We combine bright XMM data with the Chandra Deep Field South observations in order to explore the behavior of the intrinsic AGN absorption, as a function of redshift and luminosity.Our sample consists of 359 sources selected in the hard 2-8 keV band, spanning the flux range 6\times10^{-16}-$3\times10^{-13} erg s^-1 cm^...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
1204800
math/0606450
2006-06-19
Drawings of Planar Graphs with Few Slopes and Segments
We study straight-line drawings of planar graphs with few segments and few slopes. Optimal results are obtained for all trees. Tight bounds are obtained for outerplanar graphs, 2-trees, and planar 3-trees. We prove that every 3-connected plane graph on $n$ vertices has a plane drawing with at most ${5/2}n$ segments and...
[ "math.CO" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
15888664
astro-ph/0606464
2006-06-20
pMatlab Parallel Matlab Library
MATLAB has emerged as one of the languages most commonly used by scientists and engineers for technical computing, with ~1,000,000 users worldwide. The compute intensive nature of technical computing means that many MATLAB users have codes that can significantly benefit from the increased performance offered by paralle...
[ "astro-ph" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[ { "corpus_id": "211247630", "num_citations": null } ]
[ { "author_id": "n bliss_1", "name": "Nadya [\"T.\"] Bliss", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "j kepner_1", "name": "Jeremy Kepner", "publication_history": null, "h_index": null, "num_papers": nul...
null
277856702
physics/0606179
2006-06-20
Probability and Statistical Inference
These lectures introduce key concepts in probability and statistical inference at a level suitable for graduate students in particle physics. Our goal is to paint as vivid a picture as possible of the concepts covered.
[ "physics.data-an" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "h prosper_1", "name": "Harrison [\"B.\"] Prosper", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null } ]
null
13946631
math/0606476
2006-06-20
Sparse SOS Relaxations for Minimizing Functions that are Summations of Small Polynomials
This paper discusses how to find the global minimum of functions that are summations of small polynomials (``small'' means involving a small number of variables). Some sparse sum of squares (SOS) techniques are proposed. We compare their computational complexity and lower bounds with prior SOS relaxations. Under certai...
[ "math.OC" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
46908494
quant-ph/0606161
2006-06-20
Exact and Approximate Unitary 2-Designs: Constructions and Applications
We develop the concept of a unitary t-design as a means of expressing operationally useful subsets of the stochastic properties of the uniform (Haar) measure on the unitary group U(2^n) on n qubits. In particular, sets of unitaries forming 2-designs have wide applicability to quantum information protocols. We devise an...
[ "quant-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
119394456
astro-ph/0606499
2006-06-20
Nearby Supernova Factory Observations of SN 2005gj: Another Type Ia Supernova in a Massive Circumstellar Envelope
We report Nearby Supernova Factory observations of SN 2005gj, the second confirmed case of a "hybrid" Type Ia/IIn supernova. Our early-phase photometry of SN 2005gj shows that the interaction is much stronger than for the prototype, SN 2002ic. Our first spectrum shows a hot continuum with broad and narrow H-alpha emiss...
[ "astro-ph" ]
null
[ "target.author.publication_history" ]
[ { "corpus_id": "14582665", "num_citations": null }, { "corpus_id": "12494781", "num_citations": null }, { "corpus_id": "19018697", "num_citations": null }, { "corpus_id": "14001603", "num_citations": null }, { "corpus_id": "16425030", "num_citations": null }...
[ { "author_id": "g aldering_1", "name": "Greg Aldering", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "p antilogus_1", "name": "P. Antilogus", "publication_history": null, "h_index": null, "num_papers": null,...
null
119390040
astro-ph/0606514
2006-06-21
Elevation angle dependence of the SMA antenna focus position
We report the measurement results and compensation of the antenna elevation angle dependences of the Sub-millimeter Array (SMA) antenna characteristics. Without optimizing the subreflector (focus) positions as a function of the antenna elevation angle, antenna beam patterns show lopsided sidelobes, and antenna efficien...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
108285970
quant-ph/0606177
2006-06-21
Optimal purification of thermal graph states
In this paper, a purification protocol is presented and its performance is proven to be optimal when applied to a particular subset of graph states that are subject to local Z-noise. Such mixed states can be produced by bringing a system into thermal equilibrium, when it is described by a Hamiltonian which has a partic...
[ "quant-ph" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "a kay_1", "name": "Alastair Kay", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "j pachos_1", "name": "Jiannis [\"K.\"] Pachos", "publication_history": null, "h_index": null, "num_papers": nul...
null
6971031
astro-ph/0606510
2006-06-21
Linear Stability of Ring Systems
We give a self-contained modern linear stability analysis of a system of n equal mass bodies in circular orbit about a single more massive body. Starting with the mathematical description of the dynamics of the system, we form the linear approximation, compute all of the eigenvalues of the linear stability matrix, and ...
[ "astro-ph" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "r vanderbei_1", "name": "Robert [\"J.\"] Vanderbei", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "e kolemen_1", "name": "Egemen Kolemen", "publication_history": null, "h_index": null, "num_p...
null
2314541
math/0606520
2006-06-21
Multivariate risks and depth-trimmed regions
We describe a general framework for measuring risks, where the risk measure takes values in an abstract cone. It is shown that this approach naturally includes the classical risk measures and set-valued risk measures and yields a natural definition of vector-valued risk measures. Several main constructions of risk meas...
[ "math.PR", "math.ST", "q-fin.RM", "stat.TH" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
9037873
cs/0606099
2006-06-22
Fairness in Multiuser Systems with Polymatroid Capacity Region
For a wide class of multi-user systems, a subset of capacity region which includes the corner points and the sum-capacity facet has a special structure known as polymatroid. Multiaccess channels with fixed input distributions and multiple-antenna broadcast channels are examples of such systems. Any interior point of th...
[ "cs.IT", "math.IT" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "m maddah-ali_1", "name": "Mohammad [\"Ali\"] Maddah-ali", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "a mobasher_2", "name": "Amin Mobasher", "publication_history": null, "h_index": null, "...
null
15892066
astro-ph/0606564
2006-06-22
One-dimensional Hybrid Approach to Extensive Air Shower Simulation
An efficient scheme for one-dimensional extensive air shower simulation and its implementation in the program CONEX are presented. Explicit Monte Carlo simulation of the high-energy part of hadronic and electromagnetic cascades in the atmosphere is combined with a numeric solution of cascade equations for smaller energ...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
16701277
astro-ph/0606551
2006-06-22
Eclipsing binaries observed with the WIRE satellite I. Discovery and photometric analysis of the new bright A0IV eclipsing binary Psi Centauri
Determinations of stellar mass and radius with realistic uncertainties at the level of 1% provide important constraints on models of stellar structure and evolution. We present a high-precision light curve of the A0IV star Psi Centauri, from the star tracker on board the WIRE satellite and the Solar Mass Ejection Image...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
18040884
astro-ph/0606595
2006-06-23
A catalogue of micro-Jy radio sources in northern legacy fields
We present catalogues of faint 1.4-GHz radio sources from extremely-deep Very Large Array pointings in the Lockman Hole, the Hubble Deep Field North (HDF-N) and ELAIS N2. Our analysis of the HDF-N data has produced maps that are significantly deeper than those previously published and we have used these to search for c...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
280144371
2507.03354
2006-06-23
Controlling Electromagnetic Fields
Using the freedom of design which metamaterials provide, we show how electromagnetic fields can be redirected at will and propose a design strategy. The conserved fields: electric displacement field, D, magnetic induction field, B, and Poynting vector, S, are all displaced in a consistent manner. A simple illustration ...
[ "physics.optics", "cond-mat.other" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
5229455
math/0606625
2006-06-24
A Central Limit Theorem for biased random walks on Galton-Watson trees
Let ${\cal T}$ be a rooted Galton-Watson tree with offspring distribution $\{p_k\}$ that has $p_0=0$, mean $m=\sum kp_k>1$ and exponential tails. Consider the $\lambda$-biased random walk $\{X_n\}_{n\geq 0}$ on ${\cal T}$; this is the nearest neighbor random walk which, when at a vertex $v$ with $d_v$ offspring, moves ...
[ "math.PR" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
19082167
astro-ph/0606615
2006-06-25
Light Curves from an MHD Simulation of a Black Hole Accretion Disk
We use a relativistic ray-tracing code to calculate the light curves observed from a global general relativistic magneto-hydrodynamic simulation of an accretion flow onto a Schwarzschild black hole. We apply three basic emission models to sample different properties of the time-dependent accretion disk. With one of the...
[ "astro-ph" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[ { "corpus_id": "12958006", "num_citations": null }, { "corpus_id": "15082517", "num_citations": null }, { "corpus_id": "18419299", "num_citations": null }, { "corpus_id": "13896358", "num_citations": null }, { "corpus_id": "18477973", "num_citations": null }...
[ { "author_id": "j schnittman_1", "name": "Jeremy [\"D.\"] Schnittman", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "j krolik_1", "name": "Julian [\"H.\"] Krolik", "publication_history": null, "h_index": null, ...
null
14067043
astro-ph/0606611
2006-06-25
Cosmic shear analysis of archival HST/ACS data: I. Comparison of early ACS pure parallel data to the HST/GEMS Survey
This is the first paper of a series describing our measurement of weak lensing by large-scale structure using archival observations from the Advanced Camera for Surveys (ACS) on board the Hubble Space Telescope (HST). In this work we present results from a pilot study testing the capabilities of the ACS for cosmic shea...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
29922866
cond-mat/0606650
2006-06-26
Experimental Test of Universal Conductance Fluctuations by means of Wave-Chaotic Microwave Cavities
The mathematical equivalence of the time-independent Schrodinger equation and the Helmholtz equation is exploited to provide a novel means of studying universal conductance fluctuations in ballistic chaotic mesoscopic systems using a two-dimensional microwave-cavity. The classically chaotic ray trajectories within a su...
[ "cond-mat.mes-hall", "cond-mat.dis-nn" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "s hemmady_1", "name": "Sameer Hemmady", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "j hart_1", "name": "James [\"A\"] Hart", "publication_history": null, "h_index": null, "num_papers": null...
null
119542019
physics/0606224
2006-06-26
Of Songs and Men: a Model for Multiple Choice with Herding
We propose a generic model for multiple choice situations in the presence of herding and compare it with recent empirical results from a Web-based music market experiment. The model predicts a phase transition between a weak imitation phase and a strong imitation, `fashion' phase, where choices are driven by peer press...
[ "physics.data-an", "cond-mat.stat-mech", "physics.soc-ph", "q-fin.GN" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
15027610
q-bio/0606037
2006-06-26
The propagation of a cultural or biological trait by neutral genetic drift in a subdivided population
We study fixation probabilities and times as a consequence of neutral genetic drift in subdivided populations, motivated by a model of the cultural evolutionary process of language change that is described by the same mathematics as the biological process. We focus on the growth of fixation times with the number of sub...
[ "q-bio.PE" ]
null
[ "target.author.publication_history" ]
[ { "corpus_id": "3730785", "num_citations": null } ]
[ { "author_id": "r blythe_1", "name": "Richard [\"A.\"] Blythe", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null } ]
null
118867429
math/0606656
2006-06-26
Homology of torus links
In this paper we show that there is a cut-off in the Khovanov homology of $(2k,2kn)$-torus links, namely that the maximal homological degree of non-zero homology group of $(2k,2kn)$-torus link is $2k^2n$. Furthermore, we calculate explicitely the homology groups in homological degree $2k^2n$ and prove that it coincides...
[ "math.QA" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
98219053
nlin/0606061
2006-06-26
Ignition and Front Propagation in Polymer Electrolyte Membrane Fuel Cells
Water produced in a Polymer Electrolyte Membrane (PEM) fuel cell enhances membrane proton conductivity; this positive feedback loop can lead to current ignition. Using a segmented anode fuel cell we study the effect of gas phase convection and membrane diffusion of water on the spatiotemporal nonlinear dynamics - local...
[ "nlin.PS" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "j benziger_1", "name": "Jay [\"B.\"] Benziger", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "e chia_1", "name": "Ee-Sunn [\"J.\"] Chia", "publication_history": null, "h_index": null, "num_pa...
null
8735714
physics/0606215
2006-06-26
3D Meshes Registration : Application to statistical skull model
In the context of computer assist surgical techniques, a new elastic registration method of 3D meshes is presented. In our applications, one mesh is a high density mesh (30000 vertexes), the second is a low density one (1000 vertexes). Registration is based upon the minimisation of a symmetric distance between both mes...
[ "physics.med-ph", "math.ST", "stat.TH" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "m bérar_1", "name": "Maxime Bérar", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "m desvignes_1", "name": "Michel Desvignes", "publication_history": null, "h_index": null, "num_papers": null,...
null
1466359
cs/0606110
2006-06-27
Optimal Scheduling of Peer-to-Peer File Dissemination
Peer-to-peer (P2P) overlay networks such as BitTorrent and Avalanche are increasingly used for disseminating potentially large files from a server to many end users via the Internet. The key idea is to divide the file into many equally-sized parts and then let users download each part (or, for network coding based syst...
[ "cs.NI", "cs.DS", "math.OC" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
16525100
hep-th/0606256
2006-06-27
Universal terms for the entanglement entropy in 2+1 dimensions
We show that the entanglement entropy and alpha entropies corresponding to spatial polygonal sets in $(2+1)$ dimensions contain a term which scales logarithmically with the cutoff. Its coefficient is a universal quantity consisting in a sum of contributions from the individual vertices. For a free scalar field this con...
[ "hep-th", "cond-mat.other", "quant-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
423319
cond-mat/0606692
2006-06-27
Polymer size in dilute solutions in the good-solvent regime
We determine the density expansion of the radius of gyration, of the hydrodynamic radius, and of the end-to-end distance for a monodisperse polymer solution in good-solvent conditions. We consider the scaling limit (large degree of polymerization), including the leading scaling corrections. Using the expected large-con...
[ "cond-mat.stat-mech" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "s caracciolo_1", "name": "Sergio Caracciolo", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "b mognetti_1", "name": "Bortolo [\"Matteo\"] Mognetti", "publication_history": null, "h_index": null, ...
null