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21364811
quant-ph/0004088
2000-04-23
Reversing quantum dynamics with near-optimal quantum and classical fidelity
We consider the problem of reversing quantum dynamics, with the goal of preserving an initial state's quantum entanglement or classical correlation with a reference system. We exhibit an approximate reversal operation, adapted to the initial density operator and the ``noise'' dynamics to be reversed. We show that its e...
[ "quant-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
41363205
cond-mat/0004390
2000-04-24
Noncollapsing solution below r_c for a randomly forced particle
We show that a noncollapsing solution below r_c can be constructed for the dynamics of randomly forced particle interacting with a dissipative boundary. The scaling analysis predicts a divergent collision rate at the boundary for the noncollapsing solution. This prediction is tested numerically.
[ "cond-mat.stat-mech" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
8936496
physics/0004057
2000-04-24
The information bottleneck method
We define the relevant information in a signal $x\in X$ as being the information that this signal provides about another signal $y\in \Y$. Examples include the information that face images provide about the names of the people portrayed, or the information that speech sounds provide about the words spoken. Understandin...
[ "physics.data-an", "cond-mat.dis-nn", "cs.LG", "nlin.AO" ]
null
[ "target.author.publication_history.key_reference", "target.key_reference" ]
null
null
null
18819321
astro-ph/0004361
2000-04-26
New Neighbors from 2MASS: Activity and Kinematics at the Bottom of the Main Sequence
We have combined 2MASS and POSS II data in a search for nearby ultracool (later than M6.5) dwarfs with K_s<12. Spectroscopic follow-up observations identify 53 M7 to M9.5 dwarfs and seven L dwarfs. The observed space density is 0.0045 +- 0.0008 M8-M9.5 dwarfs per cubic parsec, without accounting for biases, consistent ...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
14173990
astro-ph/0004381
2000-04-27
Halo Cores and Phase Space Densities: Observational Constraints on Dark Matter Physics and Structure Formation
We explore observed dynamical trends in a wide range of dark matter dominated systems (about seven orders of magnitude in mass) to constrain hypothetical dark matter candidates and scenarios of structure formation. First, we argue that neither generic warm dark matter (collisionless or collisional) nor self-interacting...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
1310716
cond-mat/0004492
2000-04-28
Noise in neurons is message-dependent
Neuronal responses are conspicuously variable. We focus on one particular aspect of that variability: the precision of action potential timing. We show that for common models of noisy spike generation, elementary considerations imply that such variability is a function of the input, and can be made arbitrarily large or...
[ "cond-mat.dis-nn", "q-bio" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "g cecchi_1", "name": "Guillermo [\"A.\"] Cecchi", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "m sigman_1", "name": "Mariano Sigman", "publication_history": null, "h_index": null, "num_paper...
null
12633323
astro-ph/0005010
2000-04-29
Halo occupation numbers and galaxy bias
We propose a heuristic model that displays the main features of realistic theories for galaxy bias. We show that the low-order clustering statistics of the dark-matter distribution depend almost entirely on the locations and density profiles of dark-matter haloes. A hypothetical galaxy catalogue depends on (i) the effi...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
14249123
hep-ph/0005007
2000-04-30
Physics potential at a neutrino factory: can we benefit from more than just detecting muons?
In order to fully address the oscillation processes at a neutrino factory, a detector should be capable of identifying and measuring all three charged lepton flavors produced in charged current interactions {\it and} of measuring their charges to discriminate the incoming neutrino helicity. This is an experimentally ch...
[ "hep-ph" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[]
[ { "author_id": "a bueno_1", "name": "Antonio Bueno", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "m campanelli_3", "name": "Mario Campanelli", "publication_history": null, "h_index": null, "num_papers": nul...
null
15997825
quant-ph/0005008
2000-05-01
Nonbinary Quantum Stabilizer Codes
We define and show how to construct nonbinary quantum stabilizer codes. Our approach is based on nonbinary error bases. It generalizes the relationship between selforthogonal codes over $GF_{4}$ and binary quantum codes to one between selforthogonal codes over $GF_{q^2}$ and $q$-ary quantum codes for any prime power $q...
[ "quant-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
15686031
astro-ph/0005019
2000-05-01
VLA Imaging of the Disk Surrounding the Nearby Young Star TW Hya
The TW Hya system is perhaps the closest analog to the early solar nebula. We have used the Very Large Array to image TW Hya at wavelengths of 7mm and 3.6 cm with resolutions 0.1 arcseconds (about 5 AU) and 1.0 arcseconds (about 50 AU), respectively. The 7mm emission is extended and appears dominated by a dusty disk of...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
42653850
nucl-ex/0005001
2000-05-01
Antideuteron yield at the AGS and coalescence implications
We present Experiment 864's measurement of invariant antideuteron yields in 11.5A GeV/c Au + Pt collisions. The analysis includes 250 million triggers representing 14 billion 10% central interactions sampled for events with high mass candidates. We find (1/2 pi pt) d^(2)N/dydpt = 3.5 +/- 1.5 (stat.) +0.9,-0.5 (sys.) x ...
[ "nucl-ex" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "t armstrong_2", "name": "T. [\"A.\"] Armstrong", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "k barish_1", "name": "Kenneth [\"N.\"] Barish", "publication_history": null, "h_index": null, "n...
null
23539881
cond-mat/0005035
2000-05-02
Force distributions near the jamming and glass transitions
We calculate the distribution of interparticle normal forces $P(F)$ near the glass and jamming transitions in model supercooled liquids and foams, respectively. $P(F)$ develops a peak that appears near the glass or jamming transitions, whose height increases with decreasing temperature, decreasing shear stress and incr...
[ "cond-mat.soft", "cond-mat.stat-mech" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "c o’hern_1", "name": "Corey [\"S.\"] O’Hern", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "s langer_3", "name": "Stephen [\"A.\"] Langer", "publication_history": null, "h_index": null, "num_...
null
5389215
math/0005015
2000-05-02
On the distribution of points of bounded height on equivariant compactifications of vector groups
We prove asymptotic formulas for the number of rational points of bounded height on smooth equivariant compactifications of the affine space. (Nous \'etablissons un d\'eveloppement asymptotique du nombre de points rationnels de hauteur born\'ee sur les compactifications \'equivariantes lisses de l'espace affine.)
[ "math.NT", "math.AG" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
119472241
astro-ph/0005036
2000-05-02
Acoustic Signatures in the Primary Microwave Background Bispectrum
If the primordial fluctuations are non-Gaussian, then this non-Gaussianity will be apparent in the cosmic microwave background (CMB) sky. With their sensitive all-sky observation, MAP and Planck satellites should be able to detect weak non-Gaussianity in the CMB sky. On large angular scale, there is a simple relationsh...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
30457856
cond-mat/0005032
2000-05-02
Microscopic Charge Inhomogeneities in Underdoped La_2-xSr_xCuO_4: Local Structural Evidence
We present local structural evidence for the existence of charge inhomogeneities at low temperature in underdoped and optimally doped La_2-xSr_xCuO_4. The inhomogeneities disappear for x > 0.2. The evidence for the charge inhomogeneities comes from an anomalous increase in the in-plane Cu-O bond length distribution in ...
[ "cond-mat.supr-con" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "s billinge_1", "name": "Simon [\"J.\",\"L.\"] Billinge", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "e bozin_1", "name": "Emil [\"S.\"] Bozin", "publication_history": null, "h_index": null, ...
null
119435374
gr-qc/0005009
2000-05-03
Large "Dipolar" Vacuum Fluctuations in Quantum Gravity
We study a novel set of gravitational field configurations, called "dipolar zero modes", which give an exactly null contribution to the Einstein action and are thus candidates to become large fluctuations in the quantized theory. They are generated by static unphysical sources satisfying (up to terms of order G^2) the ...
[ "gr-qc" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
15249455
astro-ph/0005049
2000-05-03
On Estimating the QSO Transmission Power Spectrum
We present new methods to minimize the systematic and random errors for measuring the transmission power spectrum from the Lyman-alpha forest. Sources of systematic errors explored include metal line contamination and continuum-fitting. We advocate the technique of trend-removal in place of traditional continuum-fittin...
[ "astro-ph" ]
null
[ "target.author.publication_history" ]
[ { "corpus_id": "13461857", "num_citations": null }, { "corpus_id": "119386569", "num_citations": null }, { "corpus_id": "10994659", "num_citations": null }, { "corpus_id": "14840929", "num_citations": null }, { "corpus_id": "119350577", "num_citations": null ...
[ { "author_id": "l hui_1", "name": "Lam Hui", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "s burles_1", "name": "Scott [\"M.\"] Burles", "publication_history": null, "h_index": null, "num_papers": null, ...
null
5919608
math/0005034
2000-05-03
Variational methods, multisymplectic geometry and continuum mechanics
This paper presents a variational and multisymplectic formulation of both compressible and incompressible models of continuum mechanics on general Riemannian manifolds. A general formalism is developed for non-relativistic first-order multisymplectic field theories with constraints, such as the incompressibility constr...
[ "math.DG", "math.SG" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
10851427
hep-th/0005038
2000-05-04
The Paradox of Virtual Dipoles in the Einstein Action
The functional integral of pure Einstein 4D quantum gravity admits abnormally large and long-lasting "dipolar fluctuations", generated by virtual sources with the property Int d^4x Sqrt{g(x)} Tr T(x) = 0. These fluctuations would exist also at macroscopic scales, with paradoxical consequences. We set out their general ...
[ "hep-th" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "g modanese_1", "name": "G. Modanese", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null } ]
null
81784
cond-mat/0005085
2000-05-04
Topology of evolving networks: local events and universality
Networks grow and evolve by local events, such as the addition of new nodes and links, or rewiring of links from one node to another. We show that depending on the frequency of these processes two topologically different networks can emerge, the connectivity distribution following either a generalized power-law or an e...
[ "cond-mat.dis-nn", "cond-mat.stat-mech" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
15240034
cond-mat/0005095
2000-05-04
On nonlinear susceptibility in supercooled liquids
In this paper, we discuss theoretically the behavior of the four point nonlinear susceptibility and its associated correlation length for supercooled liquids close to the Mode Coupling instability temperature $T_c$. We work in the theoretical framework of the glass transition as described by mean field theory of disord...
[ "cond-mat.dis-nn", "cond-mat.stat-mech" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
33015452
astro-ph/0005188
2000-05-08
Neutron-Capture Elements in the Early Galaxy: Insights from a Large Sample of Metal-Poor Giants
New abundances for neutron-capture (n-capture) elements in a large sample of metal-poor giants from the Bond survey are presented. The spectra were acquired with the KPNO 4-m echelle and coude feed spectrographs, and have been analyzed using LTE fine-analysis techniques with both line analysis and spectral synthesis. A...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
119495132
astro-ph/0005123
2000-05-08
MAXIMA-1: A Measurement of the Cosmic Microwave Background Anisotropy on angular scales of 10 arcminutes to 5 degrees
We present a map and an angular power spectrum of the anisotropy of the cosmic microwave background (CMB) from the first flight of MAXIMA. MAXIMA is a balloon-borne experiment with an array of 16 bolometric photometers operated at 100 mK. MAXIMA observed a 124 square degrees region of the sky with 10 arcminute resoluti...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
8579295
hep-ph/0005069
2000-05-08
Extracting and using photon polarization information in radiative B decays
We discuss the uses of conversion electron pairs for extracting photon polarization information in weak radiative B decays. Both cases of leptons produced through a virtual and real photon are considered. Measurements of the angular correlation between the $(K\pi)$ and $(e^+e^-)$ decay planes in $B\to K^*(\to K\pi)\gam...
[ "hep-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
16010807
hep-th/0005067
2000-05-08
D-Branes at Singularities : A Bottom-Up Approach to the String Embedding of the Standard Model
We propose a bottom-up approach to the building of particle physics models from string theory. Our building blocks are Type II D-branes which we combine appropriately to reproduce desirable features of a particle theory model: 1) Chirality ; 2) Standard Model group ; 3) N=1 or N=0 supersymmetry ; 4) Three quark-lepton ...
[ "hep-th", "hep-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
14937562
astro-ph/0005181
2000-05-08
Cosmological Reionization Around the First Stars: Monte Carlo Radiative Transfer
We study the evolution of ionization fronts around the first proto-galaxies by using high resolution numerical cosmological (Lambda+CDM model) simulations and Monte Carlo radiative transfer methods. We present the numerical scheme in detail and show the results of test runs from which we conclude that the scheme is bot...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
16251662
cond-mat/0005139
2000-05-08
Connectivity of Growing Random Networks
A solution for the time- and age-dependent connectivity distribution of a growing random network is presented. The network is built by adding sites which link to earlier sites with a probability A_k which depends on the number of pre-existing links k to that site. For homogeneous connection kernels, A_k ~ k^gamma, diff...
[ "cond-mat.stat-mech", "cond-mat.dis-nn", "nlin.AO" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
14897453
cs/0005010
2000-05-08
Extending and Implementing the Stable Model Semantics
An algorithm for computing the stable model semantics of logic programs is developed. It is shown that one can extend the semantics and the algorithm to handle new and more expressive types of rules. Emphasis is placed on the use of efficient implementation techniques. In particular, an implementation of lookahead that...
[ "cs.LO", "cs.AI" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
1482053
hep-ex/0005018
2000-05-11
Measurement of the Proton Structure Function F_2 at Very Low Q^2 at HERA
A measurement of the proton structure function F_2(x,Q^2) is presented in the kinematic range 0.045 GeV^2 < Q^2 < 0.65 GeV^2 and 6*10^{-7} < x < 1*10^{-3}. The results were obtained using a data sample corresponding to an integrated luminosity of 3.9pb^-1 in e^+p reactions recorded with the ZEUS detector at HERA. Infor...
[ "hep-ex" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "j breitweg_1", "name": "J. Breitweg", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "u dosselli_1", "name": "Umberto Dosselli", "publication_history": null, "h_index": null, "num_papers": null...
null
17971531
hep-ph/0005110
2000-05-11
Production and Hadronization of Heavy Quarks
Heavy long-lived quarks, i.e. charm and bottom, are frequently studied both as tests of QCD and as probes for other physics aspects within and beyond the standard model. The long life-time implies that charm and bottom hadrons are formed and observed. This hadronization process cannot be studied in isolation, but depen...
[ "hep-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
1320
cs/0005020
2000-05-12
Centroid-based summarization of multiple documents: sentence extraction, utility-based evaluation, and user studies
We present a multi-document summarizer, called MEAD, which generates summaries using cluster centroids produced by a topic detection and tracking system. We also describe two new techniques, based on sentence utility and subsumption, which we have applied to the evaluation of both single and multiple document summaries...
[ "cs.CL", "cs.AI", "cs.DL", "cs.HC", "cs.IR" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
3264517
cs/0005019
2000-05-12
On the Scalability of the Answer Extraction System "ExtrAns"
This paper reports on the scalability of the answer extraction system ExtrAns. An answer extraction system locates the exact phrases in the documents that contain the explicit answers to the user queries. Answer extraction systems are therefore more convenient than document retrieval systems in situations where the use...
[ "cs.CL" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "d aliod_1", "name": "Diego [\"Mollá\"] Aliod", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "m hess_1", "name": "Michael Hess", "publication_history": null, "h_index": null, "num_papers": nul...
null
17587411
math-ph/0005013
2000-05-12
The Structure of Lie Algebras and the Classification Problem for Partial Differential Equations
The present paper solves completely the problem of the group classification of nonlinear heat-conductivity equations of the form\ $u_{t}=F(t,x,u,u_{x})u_{xx} + G(t,x,u,u_{x})$. We have proved, in particular, that the above class contains no nonlinear equations whose invariance algebra has dimension more than five. Furt...
[ "math-ph", "math.MP" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
11226913
astro-ph/0005260
2000-05-12
Mass function of dark matter halos
We combine data from a number of N-body simulations to predict the abundance of dark halos in Cold Dark Matter universes over more than 4 orders of magnitude in mass. A comparison of different simulations suggests that the dominant uncertainty in our results is systematic and is smaller than 10--30% at all masses, depe...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
30387688
cond-mat/0005216
2000-05-12
Multi-Choice Minority Game
The generalization of the problem of adaptive competition, known as the minority game, to the case of $K$ possible choices for each player is addressed, and applied to a system of interacting perceptrons with input and output units of the type of $K$-states Potts-spins. An optimal solution of this minority game as well...
[ "cond-mat.dis-nn" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "l ein-dor_1", "name": "Liat Ein-Dor", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "r metzler_1", "name": "Richard Metzler", "publication_history": null, "h_index": null, "num_papers": null, ...
null
14779706
hep-ph/0005136
2000-05-15
Cosmological Gravitino Problem in Gauge-Mediated Supersymmetry Breaking Models
We investigate the cosmological gravitino problem in gauge-mediated supersymmetry breaking models, where the gravitino becomes in general the lightest supersymmetric particle (LSP). In order to avoid the overclosure of the stable gravitino, the reheating temperature of inflation $T_R$ should be low enough. Furthermore,...
[ "hep-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
119457077
gr-qc/0005050
2000-05-15
The geometry of photon surfaces
The photon sphere concept in Schwarzschild space-time is generalized to a definition of a photon surface in an arbitrary space-time. A photon sphere is then defined as an SO(3)xR-invariant photon surface in a static spherically symmetric space-time. It is proved, subject to an energy condition, that a black hole in any...
[ "gr-qc" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
7007921
hep-th/0005150
2000-05-16
Hopf term induced by fermions
We derive an effective action for Dirac fermions coupled to O(3) non-linear sigma-model (NLSM) through the Yukawa-type interaction. The nonperturbative (global) quantum anomaly of this model results in a Hopf term for the effective NLSM. We obtain this term using the ``embedding'' of the CP$^1$ model into the CP$^M$ ge...
[ "hep-th", "cond-mat" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "a abanov_1", "name": "Alexander [\"G.\"] Abanov", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null } ]
null
747665
cond-mat/0005264
2000-05-16
Efficient Monte Carlo algorithm and high-precision results for percolation
We present a new Monte Carlo algorithm for studying site or bond percolation on any lattice. The algorithm allows us to calculate quantities such as the cluster size distribution or spanning probability over the entire range of site or bond occupation probabilities from zero to one in a single run which takes an amount...
[ "cond-mat.stat-mech" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
12306017
astro-ph/0005357
2000-05-17
Multiphase Smoothed-Particle Hydrodynamics
We adapt the Smoothed-Particle Hydrodynamics technique to allow a multiphase fluid in which SPH particles of widely differing density may be freely intermixed. Applications include modelling of galaxy formation and cooling flows.
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
50311217
astro-ph/0005359
2000-05-17
Multichannel interference mitigation methods in radio astronomy
Radio-astronomical observations are increasingly corrupted by RF interference, and online detection and filtering algorithms are becoming essential. To facilitate the introduction of such techniques into radio astronomy, we formulate the astronomical problem in an array signal processing language, and give an introduct...
[ "astro-ph" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "a leshem_1", "name": "Amir Leshem", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "a veen_2", "name": "Alle-Jan [\"van\",\"der\"] Veen", "publication_history": null, "h_index": null, "num_pape...
null
1275627
physics/0005046
2000-05-18
Resampling Method For Unsupervised Estimation Of Cluster Validity
We introduce a method for validation of results obtained by clustering analysis of data. The method is based on resampling the available data. A figure of merit that measures the stability of clustering solutions against resampling is introduced. Clusters which are stable against resampling give rise to local maxima of...
[ "physics.comp-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
771959
gr-qc/0005083
2000-05-18
Isolated Horizons: Hamiltonian Evolution and the First Law
A framework was recently introduced to generalize black hole mechanics by replacing stationary event horizons with isolated horizons. That framework is significantly extended. The extension is non-trivial in that not only do the boundary conditions now allow the horizon to be distorted and rotating, but also the subseq...
[ "gr-qc", "hep-th" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
38675681
quant-ph/0005084
2000-05-19
Operationally Invariant Information in Quantum Measurements
A new measure of information in quantum mechanics is proposed which takes into account that for quantum systems the only feature known before an experiment is performed are the probabilities for various events to occur. The sum of the individual measures of information for mutually complementary observations is invaria...
[ "quant-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
16332043
cond-mat/0005321
2000-05-19
Phase equilibria in the polydisperse Zwanzig model of hard rods
We study the phase behaviour of the Zwanzig model of suspensions of hard rods, allowing for polydispersity in the lengths of the rods. In spite of the simplified nature of the model (rods are restricted to lie along one of three orthogonal axes), the results agree qualitatively with experimental observations: the coexi...
[ "cond-mat.soft", "cond-mat.stat-mech" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
166155
nlin/0005042
2000-05-19
Essential nonlinearities in hearing
Our hearing organ, the cochlea, evidently poises itself at a Hopf bifurcation to maximize tuning and amplification. We show that in this condition several effects are expected to be generic: compression of the dynamic range, infinitely shrap tuning at zero input, and generation of combination tones. These effects are "...
[ "nlin.CD" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "v eguíluz_1", "name": "Víctor [\"M.\"] Eguíluz", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "v eguíluz_1", "name": "Víctor [\"M.\"] Eguíluz", "publication_history": null, "h_index": null, "...
null
209836217
hep-ex/0005028
2000-05-20
Search for Manifestations of New Physics in Fermion-Pair Production at LEP
The measurements of hadron and lepton-pair production cross sections and leptonic forward-backward asymmetries performed with the L3 detector at centre-of-mass energies between 130 GeV and 189 GeV are used to search for new physics phenomena such as: contact interactions, exchange of virtual leptoquarks, scalar quarks ...
[ "hep-ex" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "m acciarri_1", "name": "M. Acciarri", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "p achard_1", "name": "Pablo Achard", "publication_history": null, "h_index": null, "num_papers": null, ...
null
118264420
astro-ph/0005448
2000-05-23
The Enrichment History of the Intergalactic Medium: Measuring the CIV/HI Ratio in the Lyman Alpha Forest
We have obtained an exceptionally high S/N, high resolution spectrum of the gravitationally lensed quasar Q1422+231 in order to investigate the metal enrichment of the IGM. A column density distribution function (CDDF) is determined for CIV, which is well fit by a power law with index 1.44 +/- 0.05. Once a correction f...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
16442716
hep-ph/0005226
2000-05-23
Report of the Working Group on Photon and Weak Boson Production
This report discusses physics issues which can be addressed in photon and weak boson production in Run II at the Tevatron. The current understanding and the potential of Run II to expand our knowledge of direct photon production in hadronic collisions is discussed. We explore the prospects for using the W-boson cross s...
[ "hep-ph" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "u baur_1", "name": "Ulrich Baur", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "e berger_1", "name": "Edmond [\"L.\"] Berger", "publication_history": null, "h_index": null, "num_papers": null...
null
55698442
physics/0005063
2000-05-23
Scaling properties of an inviscid mean-motion fluid model
An inviscid two-dimensional fluid model with nonlinear dispersion that arises simultaneously in coarse-grained descriptions of the dynamics of the Euler equation and in the description of non-Newtonian fluids of second grade is considered. The scaling of the equilibrium states of this model for conserved energy and ens...
[ "physics.flu-dyn" ]
null
[ "target.author.publication_history" ]
[ { "corpus_id": "7937333", "num_citations": null } ]
[ { "author_id": "b nadiga_2", "name": "Balasubramanya [\"T.\"] Nadiga", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null } ]
null
11159941
quant-ph/0005101
2000-05-24
Optimal local implementation of non-local quantum gates
We investigate the minimal resources that are required in the local implementation of non-local quantum gates in a distributed quantum computer. Both classical communication requirements and entanglement consumption are investigated. We present general statements on the minimal resource requirements and present optimal...
[ "quant-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
13913676
astro-ph/0005470
2000-05-24
Intrinsic and Extrinsic Galaxy Alignment
We show with analytic models that the assumption of uncorrelated intrinsic ellipticities of target sources that is usually made in searches for weak gravitational lensing due to large-scale mass inhomogeneities (``field lensing'') is unwarranted. If the orientation of the galaxy image is determined either by the angula...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
1733329
cond-mat/0005405
2000-05-24
A multifractal random walk
We introduce a class of multifractal processes, referred to as Multifractal Random Walks (MRWs). To our knowledge, it is the first multifractal processes with continuous dilation invariance properties and stationary increments. MRWs are very attractive alternative processes to classical cascade-like multifractal models...
[ "cond-mat" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
36116287
cond-mat/0005456
2000-05-25
Laplacian growth with separately controlled noise and anisotropy
Conformal mapping models are used to study competition of noise and anisotropy in Laplacian growth. For that, a new family of models is introduced with the noise level and directional anisotropy controlled independently. Fractalization is observed in both anisotropic growth and the growth with varying noise. Fractal di...
[ "cond-mat.stat-mech", "cond-mat.soft", "nlin.CD" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
18446086
nlin/0005051
2000-05-25
Nonintegrability and Chaos in the Anisotropic Manev Problem
The anisotropic Manev problem, which lies at the intersection of classical, quantum, and relativity physics, describes the motion of two point masses in an anisotropic space under the influence of a Newtonian force-law with a relativistic correction term. Using an extension of the Poincare'-Melnikov method, we first pr...
[ "nlin.CD" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[]
[ { "author_id": "f diacu_1", "name": "Florin Diacu", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "m santoprete_1", "name": "Manuele Santoprete", "publication_history": null, "h_index": null, "num_papers": nu...
null
14636714
nlin/0005058
2000-05-26
Simulating Complex Dynamics In Intermediate And Large-Aspect-Ratio Convection Systems
Buoyancy-induced (Rayleigh-Benard) convection of a fluid between two horizontal plates is a central paradigm for studying the transition to complex spatiotemporal dynamics in sustained nonequilibrium systems. To improve the analysis of experimental data and the quantitative comparison of theory with experiment, we have...
[ "nlin.PS", "nlin.CD", "physics.flu-dyn" ]
null
[ "target.author.publication_history" ]
[ { "corpus_id": "7643856", "num_citations": null } ]
[ { "author_id": "m lai_8", "name": "Ming-Chih Lai", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "k chiam_1", "name": "Keng-Hwee Chiam", "publication_history": null, "h_index": null, "num_papers": null, "...
null
119019769
cond-mat/0005467
2000-05-26
Reply to the Comment on``Scaling Laws for a System with Long--Range Interactions within Tsallis Statistics''
The fact that mean field theory is appropriate to describe an Ising model with long-range interactions has been already shown by Cannas and Tamarit. Although not explicited in our Letter, we have used periodic boundary conditions in all our simulations, such that the maximum possible distance between two lattice sites ...
[ "cond-mat.stat-mech" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "r salazar_1", "name": "R. Salazar", "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, "num_...
null
977250
physics/0005074
2000-05-26
Evolution of Biological Complexity
In order to make a case for or against a trend in the evolution of complexity in biological evolution, complexity needs to be both rigorously defined and measurable. A recent information-theoretic (but intuitively evident) definition identifies genomic complexity with the amount of information a sequence stores about i...
[ "physics.bio-ph", "cond-mat.stat-mech", "cs.CC", "nlin.AO", "physics.data-an", "q-bio.PE" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
119468137
quant-ph/0005121
2000-05-29
Bell Measurements and Observables
A general matrix approach to study entangled states is presented, based on operator completeness relations. Bases of unitary operators are considered, with focus on irreducible representations of groups. Bell measurements for teleportation are considered, and robustness of teleportation to various kinds of non idealiti...
[ "quant-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
29887563
cond-mat/0005509
2000-05-29
Shear response of a frictional interface to a normal load modulation
We study the shear response of a sliding multicontact interface submitted to a harmonically modulated normal load, without loss of contact. We measure, at low velocities ($V<100 \mu$m.s$^{-1}$), the average value $\bar{F}$ of the friction force and the amplitude of its first and second harmonic components. The excitati...
[ "cond-mat" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
15796646
astro-ph/0005553
2000-05-29
A Measurement of the Temperature-Density Relation in the Intergalactic Medium Using a New Lyman-alpha Absorption Line Fitting Method
The evolution of the temperature in the intergalactic medium is related to the reionization of hydrogen and helium, and has important consequences for our understanding of the Lya forest and of galaxy formation in gravitational models of large-scale structure. We measure the temperature-density relation of intergalacti...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
2706702
astro-ph/0005557
2000-05-29
Evolutionary models for very-low-mass stars and brown dwarfs with dusty atmospheres
We present evolutionary calculations for very-low-mass stars and brown dwarfs based on synthetic spectra and non-grey atmosphere models which include dust formation and opacity, i.e. objects with $\te\simle 2800$ K. The interior of the most massive brown dwarfs is shown to develop a conductive core after $\sim 2$ Gyr w...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
18796495
gr-qc/0005126
2000-05-29
Quantum Geometry of Isolated Horizons and Black Hole Entropy
Using the earlier developed classical Hamiltonian framework as the point of departure, we carry out a non-perturbative quantization of the sector of general relativity, coupled to matter, admitting non-rotating isolated horizons as inner boundaries. The emphasis is on the quantum geometry of the horizon. Polymer excita...
[ "gr-qc", "hep-th" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
16132228
astro-ph/0005554
2000-05-29
Implications of the cosmic infrared background for light production and the star formation history in the Universe
The Cosmic Background due to the integrated radiation from galaxies over the whole life of the Universe is reviewed. We find that this background is well constrained by measurements. The total power in the background is in the range 60-93 nW/m2/sr. The data show the existence of a minimum separating the direct stellar ...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
2578976
1408.1482
2000-05-30
Axiomatizing Causal Reasoning
Causal models defined in terms of a collection of equations, as defined by Pearl, are axiomatized here. Axiomatizations are provided for three successively more general classes of causal models: (1) the class of recursive theories (those without feedback), (2) the class of theories where the solutions to the equations ...
[ "cs.AI", "cs.LO" ]
null
[ "target.author.publication_history.key_reference", "target.key_reference" ]
null
null
null
8173849
cs/0005029
2000-05-30
Ranking suspected answers to natural language questions using predictive annotation
In this paper, we describe a system to rank suspected answers to natural language questions. We process both corpus and query using a new technique, predictive annotation, which augments phrases in texts with labels anticipating their being targets of certain kinds of questions. Given a natural language question, an IR...
[ "cs.CL" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
14824301
cond-mat/0006001
2000-05-31
Small worlds
Small world models are networks consisting of many local links and fewer long range `shortcuts'. In this paper, we consider some particular instances, and rigorously investigate the distribution of their inter--point network distances. Our results are framed in terms of approximations, whose accuracy increases with the...
[ "cond-mat.dis-nn" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[ { "corpus_id": "5740210", "num_citations": null }, { "corpus_id": "15144274", "num_citations": null } ]
[ { "author_id": "a barbour_1", "name": "Andrew [\"D.\"] Barbour", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "g reinert_1", "name": "Gesine Reinert", "publication_history": null, "h_index": null, "num_paper...
null
14936372
hep-ex/0005046
2000-05-31
Feasibility of a Next Generation Underground Water Cherenkov Detector: UNO
The feasibility of a next generation underground water Cherenkov detector is examined and a conceptual design (UNO) is presented. The design has a linear detector configuration with a total volume of 650 kton which is 13 times the total volume of the Super-Kamiokande detector. It corresponds to a 20 times increase in f...
[ "hep-ex" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
119442538
astro-ph/0006003
2000-05-31
The FIRST Sample of Ultraluminous Infrared Galaxies at High Redshift I. Sample and Near-IR Morphologies
We present a new sample of distant ultraluminous infrared galaxies. The sample was selected from a positional cross--correlation of the IRAS Faint Source Catalog with the FIRST database. Objects from this set were selected for spectroscopy by virtue of following the well-known star-forming galaxy correlation between 1....
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
16016653
cond-mat/0006011
2000-06-01
Statistical Mechanics of Recurrent Neural Networks II. Dynamics
A lecture notes style review of the non-equilibrium statistical mechanics of recurrent neural networks with discrete and continuous neurons (e.g. Ising, graded-response, coupled-oscillators). To be published in the Handbook of Biological Physics (North-Holland). Accompanied by a similar review (part I) dealing with the...
[ "cond-mat.dis-nn", "q-bio" ]
null
[ "target.key_reference" ]
null
null
null
10589218
hep-lat/0006001
2000-06-01
The Critical Mass of Wilson Fermions: A Comparison of Perturbative and Monte Carlo Results
We calculate the critical value of the hopping parameter, $\kappa_c$, in Lattice QCD with Wilson fermions, to two loops in perturbation theory. This quantity is an additive renormalization; as such, it is characterized not only by the standard caveats regarding the asymptotic nature of perturbative results, but also by...
[ "hep-lat" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
941448
cs/0006009
2000-06-02
Knowledge and common knowledge in a distributed environment
Reasoning about knowledge seems to play a fundamental role in distributed systems. Indeed, such reasoning is a central part of the informal intuitive arguments used in the design of distributed protocols. Communication in a distributed system can be viewed as the act of transforming the system's state of knowledge. Thi...
[ "cs.DC", "cs.AI" ]
null
[ "target.author.publication_history.key_reference", "target.key_reference" ]
null
null
null
6508110
astro-ph/0006053
2000-06-04
A Fundamental Relation Between Supermassive Black Holes and Their Host Galaxies
The masses of supermassive black holes correlate almost perfectly with the velocity dispersions of their host bulges, M(BH) ~ sigma^alpha, where alpha =4.8 +/- 0.5$. The relation is much tighter than the relation between M(BH) and bulge luminosity, with a scatter no larger than expected on the basis of measurement erro...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
15512857
astro-ph/0006069
2000-06-05
First Observations of the Magnetic Field Geometry in Pre-stellar Cores
We present the first published maps of magnetic fields in pre-stellar cores, to test theoretical ideas about the way in which the magnetic field geometry affects the star formation process. The observations are JCMT-SCUBA maps of 850 micron thermal emission from dust. Linear polarizations at typically ten or more indep...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
3255905
astro-ph/0006072
2000-06-05
A Powerful Radio Halo in the Hottest Known Cluster of Galaxies 1E0657-56
We report the detection of a diffuse radio halo source in the hottest known cluster of galaxies 1E0657-56 (RXJ0658-5557). The radio halo has a morphology similar to the X-ray emission from the hot intracluster medium. The presence of a luminous radio halo in such a hot cluster is further evidence for a steep correlatio...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
7975474
math/0006043
2000-06-06
An Arakelov theoretic proof of the equality of conductor and discriminant
We give an Arakelov theoretic proof of the equality of conductor and discriminant for arithmetic surfaces over number fields. This was first proved by T. Saito for relative curves over discrete valuation rings.
[ "math.AG", "math.NT" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "s unver_1", "name": "Sinan Unver", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null } ]
null
3073301
astro-ph/0006080
2000-06-06
Optical and Infrared photometry of the type IIn SN 1998S:Days 11-146
We present contemporaneous optical and infrared photometric observations of the type IIn SN 1998S covering the period between 11 and 146 days after discovery. The infrared data constitute the first ever infrared light curves of a type IIn supernova. We use blackbody and spline fits to the photometry to examine the lumi...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
6649691
cs/0006013
2000-06-07
An evaluation of Naive Bayesian anti-spam filtering
It has recently been argued that a Naive Bayesian classifier can be used to filter unsolicited bulk e-mail ("spam"). We conduct a thorough evaluation of this proposal on a corpus that we make publicly available, contributing towards standard benchmarks. At the same time we investigate the effect of attribute-set size, ...
[ "cs.CL", "cs.AI" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[]
[ { "author_id": "i androutsopoulos_1", "name": "Ion Androutsopoulos", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "j koutsias_1", "name": "John Koutsias", "publication_history": null, "h_index": null, "num_p...
null
10665576
cond-mat/0006104
2000-06-07
Asymptotic Analysis of Diffuse-Layer Effects on Time-Dependent Interfacial Kinetics
We investigate the subtle effects of diffuse charge on interfacial kinetics by solving the governing equations for ion transport (Nernst-Planck) with realistic boundary conditions representing reaction kinetics (Butler-Volmer) and compact-layer capacitance (Stern) in the asymptotic limit $\epsilon = \lambda_D/L \to 0$,...
[ "cond-mat.soft", "physics.chem-ph" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[]
[ { "author_id": "a bonnefont_0", "name": "Antoine Bonnefont", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "f argoul_1", "name": "Françoise Argoul", "publication_history": null, "h_index": null, "num_papers":...
null
14394692
astro-ph/0006118
2000-06-08
Tentative Detection of Galaxy Spin Correlations in the Tully Catalogue
We report a tentative detection of spin correlations in the Tully catalogue of nearby galaxies. We define a simple but nontrivial spin correlation function, and find an analytic estimate of it in the frame of the linear perturbation theory. Then, we present the observed spin correlation signal from the Tully galaxies w...
[ "astro-ph" ]
null
[ "target.author.publication_history" ]
[ { "corpus_id": "13875430", "num_citations": null }, { "corpus_id": "8153768", "num_citations": null }, { "corpus_id": "15286498", "num_citations": null } ]
[ { "author_id": "u pen_1", "name": "Ue-li Pen", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "j lee_13", "name": "Jounghun Lee", "publication_history": null, "h_index": null, "num_papers": null, "num_cita...
null
17532026
math/0006059
2000-06-08
Finite Difference Approximation of Free Discontinuity Problems
We approximate functionals depending on the gradient of $u$ and on the behaviour of $u$ near the discontinuity points, by families of non-local functionals where the gradient is replaced by finite differences. We prove pointwise convergence, $\Gamma$-convergence, and a compactness result which implies, in particular, t...
[ "math.FA" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
4847778
astro-ph/0006134
2000-06-09
Weakly Self-Interacting Dark Matter and the Structure of Dark Halos
We study the formation of dark halos in a $\Lambda$CDM universe under the assumption that Cold Dark Matter particles have a finite cross-section for elastic collisions. We compare evolution when CDM mean free paths are comparable to halo sizes with the collisionless and fluid limits. We show that a few collisions per p...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
215825908
cs/0006023
2000-06-10
Dialogue Act Modeling for Automatic Tagging and Recognition of Conversational Speech
We describe a statistical approach for modeling dialogue acts in conversational speech, i.e., speech-act-like units such as Statement, Question, Backchannel, Agreement, Disagreement, and Apology. Our model detects and predicts dialogue acts based on lexical, collocational, and prosodic cues, as well as on the discourse...
[ "cs.CL" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference", "target.key_reference" ]
[ { "corpus_id": "1206", "num_citations": null } ]
[ { "author_id": "a stolcke_1", "name": "Andreas Stolcke", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "k ries_1", "name": "Klaus Ries", "publication_history": null, "h_index": null, "num_papers": null, "...
null
2352988
cs/0006024
2000-06-10
Can Prosody Aid the Automatic Classification of Dialog Acts in Conversational Speech?
Identifying whether an utterance is a statement, question, greeting, and so forth is integral to effective automatic understanding of natural dialog. Little is known, however, about how such dialog acts (DAs) can be automatically classified in truly natural conversation. This study asks whether current approaches, whic...
[ "cs.CL" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "e shriberg_1", "name": "Elizabeth Shriberg", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "r bates_1", "name": "Rebecca [\"A.\"] Bates", "publication_history": null, "h_index": null, "num_pap...
null
8150809
cs/0006025
2000-06-11
Entropy-based Pruning of Backoff Language Models
A criterion for pruning parameters from N-gram backoff language models is developed, based on the relative entropy between the original and the pruned model. It is shown that the relative entropy resulting from pruning a single N-gram can be computed exactly and efficiently for backoff models. The relative entropy meas...
[ "cs.CL" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[]
[ { "author_id": "a stolcke_1", "name": "Andreas Stolcke", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null } ]
null
119031437
cond-mat/0006193
2000-06-12
Stripes And Nodal Fermions As Two Sides Of The Same Coin
One of the central problems in High T_{c} superconductivity is to reconcile the abundant evidence for stripe-like physics at `short' distances with the equally convincing evidence for BCS like physics at large distance scales (the `nodal fermions'). Our central hypothesis is that the duality notion applies: the superco...
[ "cond-mat.str-el", "cond-mat.supr-con" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "j zaanen_1", "name": "Jan Zaanen", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "z nussinov_1", "name": "Zohar Nussinov", "publication_history": null, "h_index": null, "num_papers": null, ...
null
15025787
hep-ph/0006156
2000-06-14
Field Correlators in Abelian-Projected Theories and Stochastic Vacuum Model
The bilocal electric field strength correlators in Abelian-projected SU(2)- and SU(3)-theories are derived with accounting for the contributions to these quantities brought about by the virtual vortex loops, built out of the dual Nielsen-Olesen strings. Owing to the screening of magnetic charge of the dual vector boson...
[ "hep-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
42088715
quant-ph/0006064
2000-06-14
Separability and distillability in composite quantum systems -a primer-
Quantum mechanics is already 100 years old, but remains alive and full of challenging open problems. On one hand, the problems encountered at the frontiers of modern theoretical physics like Quantum Gravity, String Theories, etc. concern Quantum Theory, and are at the same time related to open problems of modern mathem...
[ "quant-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
12658468
astro-ph/0006217
2000-06-15
WFPC2 Stellar Photometry with HSTphot
HSTphot, a photometry package designed to handle the undersampled PSFs found in WFPC2 images, is introduced and described, as well as some of the considerations that have to be made in order to obtain accurate PSF-fitting stellar photometry with WFPC2 data. Tests of HSTphot's internal reliability are made using multipl...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
9443267
astro-ph/0006218
2000-06-15
Halo Properties in Cosmological Simulations of Self-Interacting Cold Dark Matter
We present a comparison of halo properties in cosmological simulations of collisionless cold dark matter (CDM) and self-interacting dark matter (SIDM) for a range of dark matter cross sections. We find, in agreement with various authors, that CDM yields cuspy halos that are too centrally concentrated as compared to obs...
[ "astro-ph", "hep-ph" ]
null
[ "target.author.publication_history" ]
[ { "corpus_id": "5644398", "num_citations": null }, { "corpus_id": "11002186", "num_citations": null }, { "corpus_id": "15271568", "num_citations": null }, { "corpus_id": "118898069", "num_citations": null }, { "corpus_id": "17937624", "num_citations": null }...
[ { "author_id": "r dav'e_1", "name": "Romeel [\"A.\"] Dav'e", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "d spergel_1", "name": "David [\"N.\"] Spergel", "publication_history": null, "h_index": null, "num_p...
null
27618197
gr-qc/0006054
2000-06-15
Slowly rotating voids in cosmology
We consider a spacetime consisting of an empty void separated from an almost Friedmann-Lema\^\i tre-Robertson-Walker (FLRW) dust universe by a spherically symmetric, slowly rotating shell which is comoving with the cosmic dust. We treat in a unified manner all types of the FLRW universes. The metric is expressed in ter...
[ "gr-qc", "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
3262490
cs/0006029
2000-06-17
Systematic Performance Evaluation of Multipoint Protocols
The advent of multipoint (multicast-based) applications and the growth and complexity of the Internet has complicated network protocol design and evaluation. In this paper, we present a method for automatic synthesis of worst and best case scenarios for multipoint protocol performance evaluation. Our method uses a faul...
[ "cs.NI", "cs.DS" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "a helmy_1", "name": "Ahmed [\"G.\"] Helmy", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "s gupta_4", "name": "Sandeep [\"Kumar\"] Gupta", "publication_history": null, "h_index": null, "num_p...
null
119415861
astro-ph/0006269
2000-06-20
Statistics of smoothed cosmic fields in perturbation theory I: Formulation and useful formulas in second-order perturbation theory
We formulate a general method for perturbative evaluations of statistics of smoothed cosmic fields, and provide useful formulas in application of the perturbation theory to various statistics. This formalism is an extensive generalization of the method used by Matsubara (1994) who derived a weakly nonlinear formula of ...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
24721399
hep-th/0006157
2000-06-20
Chiral non-linear sigma-models as models for topological superconductivity
We study the mechanism of topological superconductivity in a hierarchical chain of chiral non-linear sigma-models (models of current algebra) in one, two, and three spatial dimensions. The models have roots in the 1D Peierls-Frohlich model and illustrate how the 1D Frohlich's ideal conductivity extends to a genuine sup...
[ "hep-th", "cond-mat" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "a abanov_1", "name": "Alexander [\"G.\"] Abanov", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "p wiegmann_1", "name": "Paul [\"B.\"] Wiegmann", "publication_history": null, "h_index": null, ...
null
18546617
astro-ph/0006292
2000-06-21
A High Intrinsic Peculiarity Rate Among Type Ia Supernovae
We have compiled a sample of 45 Type Ia supernovae (SNe Ia) discovered by the Lick Observatory Supernova Search (LOSS) and the Beijing Astronomical Observatory Supernova Survey (BAOSS), and determined the rate of spectroscopically peculiar SNe Ia (i.e., SN 1986G-like, SN 1991bg-like, and SN 1991T-like objects) and the ...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
14733840
astro-ph/0006291
2000-06-21
Monte Carlo Simulations of Type Ia Supernova Observations in Supernova Surveys
We have performed Monte Carlo simulations of type Ia supernova (SN Ia) surveys to quantify their efficiency in discovering peculiar overluminous and underluminous SNe Ia. We determined how the type of survey (magnitude-limited, distance-limited, or a hybrid) and its characteristics (observations frequency and detection...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
51743067
hep-ex/0006025
2000-06-21
Measurement of Rapidity Distribution for High Mass Drell-Yan ee Pairs at CDF
We report on the first measurement of the rapidity distribution dsigma/dy over nearly the entire kinematic region of rapidity for e^+e^- pairs in the Z-boson region of 66<M_{ee}<116 GeV/c^2 and at higher mass M_{ee}>116 GeV/c^2. The data sample consists of 108 pb^{-1} of ppbar collisions at \sqrt{s}=1.8 TeV taken by th...
[ "hep-ex" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "t affolder_1", "name": "Tony Affolder", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "h akimoto_1", "name": "H. Akimoto", "publication_history": null, "h_index": null, "num_papers": null, ...
null
118434699
astro-ph/0006325
2000-06-22
Toward High-Precision Astrometry with WFPC2. I. Deriving an Accurate PSF
The first step toward doing high-precision astrometry is the measurement of individual stars in individual images, a step that is fraught with dangers when the images are undersampled. The key to avoiding systematic positional error in undersampled images is to determine an extremely accurate point-spread function (PSF...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
15540446
hep-th/0006179
2000-06-22
Superconformal Symmetry, Supergravity and Cosmology
We introduce the general N=1 gauge theory superconformally coupled to supergravity. The theory has local SU(2,2|1) symmetry and no dimensional parameters. The superconformal origin of the Fayet-Iliopoulos terms is clarified. The phase of this theory with spontaneously broken conformal symmetry gives various formulation...
[ "hep-th", "astro-ph", "gr-qc", "hep-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
18978760
cond-mat/0006372
2000-06-23
Symmetry and designability for lattice protein models
Native protein folds often have a high degree of symmetry. We study the relationship between the symmetries of native proteins, and their designabilities -- how many different sequences encode a given native structure. Using a two-dimensional lattice protein model based on hydrophobicity, we find that those native stru...
[ "cond-mat.stat-mech", "cond-mat.soft", "q-bio.BM" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "t wang_115", "name": "Tairan Wang", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "j miller_21", "name": "Jonathan Miller", "publication_history": null, "h_index": null, "num_papers": null, ...
null