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7071640
hep-th/9409188
1994-09-29
On Orbifolds with Discrete Torsion
We consider the interpretation in classical geometry of conformal field theories constructed from orbifolds with discrete torsion. In examples we can analyze, these spacetimes contain ``stringy regions'' that from a classical point of view are singularities that are to be neither resolved nor blown up. Some of these mo...
[ "hep-th", "math.AG", "math.DG" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
16012060
math/9410218
1994-10-01
On the geometric and topological rigidity of hyperbolic 3-manifolds
A homotopy equivalence between a hyperbolic 3-manifold and a closed irreducible 3-manifold is homotopic to a homeomorphsim provided the hyperbolic manifold satisfies a purely geometric condition. There are no known examples of hyperbolic 3-manifolds which do not satisfy this condition.
[ "math.GT" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
19010205
hep-ph/9410206
1994-10-03
Particle Hamiltonian and Perturbative Gauge Theories
We discuss the Hamiltonian formulation of the Schwinger proper-time method of calculating Green functions in gauge theories. Instead of calculating Feynman diagrams, we solve the corresponding Dyson-Schwinger equations. We express the solutions in terms of vertex operators, which consist of the zero modes of the vertex...
[ "hep-ph", "hep-th" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "g siopsis_1", "name": "George Siopsis", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null } ]
null
50209936
astro-ph/9410004
1994-10-03
Simulations of the Microwave Sky and of its ``Observations''
Here follows a preliminary report on the construction of fake millimeter and sub-millimeter skies, as observed by virtual instruments, e.g. the COBRA/SAMBA mission, using theoretical modeling and data extrapolations. Our goal is to create maps as realistic as possible of the relevant physical contributions which may co...
[ "astro-ph" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "f bouchet_2", "name": "F. [\"R.\"] Bouchet", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "r gispert_1", "name": "Richard Gispert", "publication_history": null, "h_index": null, "num_papers":...
null
8917755
gr-qc/9410002
1994-10-04
Can Galactic Observations Be Explained by a Relativistic Gravity Theory?
We consider the possibility of an alternative gravity theory explaining the dynamics of galactic systems without dark matter. From very general assumptions about the structure of a relativistic gravity theory we derive a general expression for the metric to order $(v/c)^2$. This allows us to compare the predictions of ...
[ "gr-qc" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
15604511
alg-geom/9410001
1994-10-04
Strong McKay Correspondence, String-theoretic Hodge Numbers and Mirror Symmetry
In the revised version of the paper, we correct misprints and add some new statements.
[ "alg-geom", "hep-th", "math.AG" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
12914628
cmp-lg/9410005
1994-10-10
A Centering Approach to Pronouns
In this paper we present a formalization of the centering approach to modeling attentional structure in discourse and use it as the basis for an algorithm to track discourse context and bind pronouns. As described in Grosz, Joshi and Weinstein (1986), the process of centering attention on entities in the discourse give...
[ "cmp-lg", "cs.CL" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
12974094
math/9410209
1994-10-11
Simulation of simplicity: a technique to cope with degenerate cases in geometric algorithms
This paper describes a general-purpose programming technique, called the Simulation of Simplicity, which can be used to cope with degenerate input data for geometric algorithms. It relieves the programmer from the task to provide a consistent treatment for every single special case that can occur. The programs that use...
[ "math.CO", "cs.CC" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
122611276
chao-dyn/9410001
1994-10-14
Dynamics of Small Autocatalytic Reaction Network II: Replication, Mutation and Catalysis
Mutation is introduced into autocatalytic reaction networks. Examples of low dimensional dynamical systems --- n = 2, 3 and 4 --- are discussed and complete qualitative analysis is presented. Error thresholds known from simple replication-mutation kinetics with frequency independent replication rates occur here as well...
[ "chao-dyn", "nlin.CD" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
119333874
astro-ph/9410043
1994-10-14
Formation and Evolution of Galaxies: Les Houches Lectures
This is a set of lecture notes based on the lectures on the formation and evolution of galaxies which were given by S. White at Les Houches in August 1993. This postscript file does not contain the 16 figures. A version containing these figures can be obtained by writing to: Fr. C. Rickl, MPI fuer Astrophysik, Karl-Sch...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
4667482
math/9410210
1994-10-18
Optimal pooling designs with error detection
Consider a collection of objects, some of which may be `bad', and a test which determines whether or not a given sub-collection contains no bad objects. The non-adaptive pooling (or group testing) problem involves identifying the bad objects using the least number of tests applied in parallel. The `hypergeometric' case...
[ "math.CO" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
1297432
cmp-lg/9410008
1994-10-20
Recognizing Text Genres with Simple Metrics Using Discriminant Analysis
A simple method for categorizing texts into predetermined text genre categories using the statistical standard technique of discriminant analysis is demonstrated with application to the Brown corpus. Discriminant analysis makes it possible use a large number of parameters that may be specific for a certain corpus or in...
[ "cmp-lg", "cs.CL" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "j karlgren_1", "name": "Jussi Karlgren", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "d cutting_2", "name": "Douglas [\"R.\"] Cutting", "publication_history": null, "h_index": null, "num_pap...
null
9931676
cmp-lg/9410011
1994-10-21
Dilemma - An Instant Lexicographer
Dilemma is intended to enhance quality and increase productivity of expert human translators by presenting to the writer relevant lexical information mechanically extracted from comparable existing translations, thus replacing - or compensating for the absence of - a lexicographer and stand-by terminologist rather than...
[ "cmp-lg", "cs.CL" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "h karlgren_0", "name": "Hans Karlgren", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "j karlgren_1", "name": "Jussi Karlgren", "publication_history": null, "h_index": null, "num_papers": null...
null
4683457
cmp-lg/9410026
1994-10-24
A Rule-Based Approach To Prepositional Phrase Attachment Disambiguation
In this paper, we describe a new corpus-based approach to prepositional phrase attachment disambiguation, and present results comparing performance of this algorithm with other corpus-based approaches to this problem.
[ "cmp-lg", "cs.CL" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
16834596
cond-mat/9410110
1994-10-29
The spectral gap for some spin chains with discrete symmetry breaking
We prove that for any finite set of generalized valence bond solid (GVBS) states of a quantum spin chain there exists a translation invariant finite-range Hamiltonian for which this set is the set of ground states. This result implies that there are GVBS models with arbitrary broken discrete symmetries that are describ...
[ "cond-mat" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
259762
chao-dyn/9410007
1994-10-30
Dynamical Ensembles in Nonequilibrium Statistical Mechanics
Ruelle's principle for turbulence leading to what is usually called the Sinai-Ruelle-Bowen distribution (SRB) is applied to the statistical mechanics of many particle systems in nonequilibrium stationary states. A specific prediction, obtained without the need to construct explicitly the SRB itself, is shown to be in a...
[ "chao-dyn", "nlin.CD" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
30885028
cmp-lg/9411002
1994-11-01
CLARE: A Contextual Reasoning and Cooperative Response Framework for the Core Language Engine
This report describes the research, design and implementation work carried out in building the CLARE system at SRI International, Cambridge, England. CLARE was designed as a natural language processing system with facilities for reasoning and understanding in context and for generating cooperative responses. The projec...
[ "cmp-lg", "cs.CL" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
119382511
astro-ph/9411005
1994-11-01
A Method for Weak Lensing Observations
We develop and test a method for measuring the gravitational lensing induced distortion of faint background galaxies. We first describe how we locate the galaxies and measure a 2-component `polarisation' or ellipticity statistic $e_\alpha$ whose expectation value should be proportional to the gravitational shear $\gamm...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
9466508
hep-th/9411054
1994-11-08
Waves and Solitons in the Continuum Limit of the Calogero-Sutherland Model
We examine a collection of particles interacting with inverse-square two-body potentials in the thermodynamic limit. We find explicit large-amplitude density waves and soliton solutions for the motion of the system. Waves can be constructed as coherent states of either solitons or phonons. Therefore, either solitons or...
[ "hep-th", "cond-mat" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
14977250
chao-dyn/9411004
1994-11-08
Semiquantum Chaos and the Large N Expansion
We consider the dynamical system consisting of a quantum degree of freedom $A$ interacting with $N$ quantum oscillators described by the Lagrangian \bq L = {1\over 2}\dot{A}^2 + \sum_{i=1}^{N} \left\{{1\over 2}\dot{x}_i^2 - {1\over 2}( m^2 + e^2 A^2)x_i^2 \right\}. \eq In the limit $N \rightarrow \infty$, with $e^2 N$ ...
[ "chao-dyn", "nlin.CD" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "f cooper_1", "name": "Fred Cooper", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "j dawson_1", "name": "John [\"F.\"] Dawson", "publication_history": null, "h_index": null, "num_papers": null...
null
14292402
hep-lat/9411014
1994-11-09
Continuum limit of field theories regularized on a random lattice
The continuum limit and scaling properties of an asymptotically free field theory regularized on a random lattice are compared with those on a regular square lattice. We work on random lattices parametrized by a degree of ``randomness'' $\kappa$. We show that the continuum limit exists and different $\kappa$ are relate...
[ "hep-lat" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "b allés_1", "name": "B. Allés", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "m beccaria_1", "name": "Matteo Beccaria", "publication_history": null, "h_index": null, "num_papers": null, "...
null
16054324
astro-ph/9411036
1994-11-09
Does a Non-Magnetic Solar Chromosphere Exist?
Enhanced chromospheric emission which corresponds to an outwardly increasing semiempirical temperature structure can be produced by wave motion without any increase in the mean gas temperture. Hence, the sun may not have a classical chromosphere in magnetic field free internetwork regions. Other significant differences...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
15297879
cmp-lg/9411017
1994-11-10
Comlex Syntax: Building a Computational Lexicon
We describe the design of Comlex Syntax, a computational lexicon providing detailed syntactic information for approximately 38,000 English headwords. We consider the types of errors which arise in creating such a lexicon, and how such errors can be measured and controlled.
[ "cmp-lg", "cs.CL" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
119404849
astro-ph/9411044
1994-11-10
Spectral Classification of Galaxies: An Orthogonal Approach
Classification of galaxy spectral energy distributions in terms of orthogonal basis functions provides an objective means of estimating the number of significant spectral components that comprise a particular galaxy type. We apply the Karhunen-Lo\`{e}ve transform to derive a spectral eigensystem from a sample of ten ga...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
40048660
cond-mat/9411081
1994-11-18
Monte Carlo with Absorbing Markov Chains: Fast Local Algorithms for Slow Dynamics
A class of Monte Carlo algorithms which incorporate absorbing Markov chains is presented. In a particular limit, the lowest-order of these algorithms reduces to the $n$-fold way algorithm. These algorithms are applied to study the escape from the metastable state in the two-dimensional square-lattice nearest-neighbor I...
[ "cond-mat", "adap-org", "comp-gas", "hep-lat", "nlin.AO", "nlin.CG" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
38360908
astro-ph/9411082
1994-11-19
Gravitational Lensing Limits on Cold Dark Matter and Its Variants
Standard $\Omega_0=1$ cold dark matter (CDM) needs $0.27 < \sigma_8 < 0.63$ ($2\sigma$) to fit the observed number of large separation lenses, and the constraint is nearly independent of $H_0=100h^{-1}\kms$ Mpc$^{-1}$. This range is strongly inconsistent with the COBE estimate of $\sigma_8=(2.8\pm0.2)h$. Tilting the pr...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
119392974
hep-lat/9411045
1994-11-23
Monopole condensation ans superconductivity: the $SU(2)$ case
We study the behaviour of a suitably defined disorder parameter, showing for the first time monopole condenssation in the ground state of QCD.
[ "hep-lat", "hep-th" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "l debbio_1", "name": "Luigi [\"Del\"] Debbio", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "a giacomo_1", "name": "Adriano [\"di\"] Giacomo", "publication_history": null, "h_index": null, "n...
null
11595344
cmp-lg/9411029
1994-11-28
An Efficient Probabilistic Context-Free Parsing Algorithm that Computes Prefix Probabilities
We describe an extension of Earley's parser for stochastic context-free grammars that computes the following quantities given a stochastic context-free grammar and an input string: a) probabilities of successive prefixes being generated by the grammar; b) probabilities of substrings being generated by the nonterminals,...
[ "cmp-lg", "cs.CL" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference", "target.key_reference" ]
[]
[ { "author_id": "a stolcke_1", "name": "Andreas Stolcke", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null } ]
null
15093335
hep-ph/9411426
1994-11-29
Topcolor Assisted Technicolor
A condensate, $\overline{t}t$, arising from $O(TeV)$ scale ``topcolor,'' in addition to technicolor (and ETC) may naturally explain the gauge hierarchy, the large top quark mass, and contains a rich system of testable consequences. A triplet of strongly coupled pseudo--Nambu--Goldstone bosons, ``top-pions,'' near the t...
[ "hep-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
18191127
hep-th/9411234
1994-11-30
Arithmetic Properties of Mirror Map and Quantum Coupling
We study some arithmetic properties of the mirror maps and the quantum Yukawa coupling for some 1-parameter deformations of Calabi-Yau manifolds. First we use the Schwarzian differential equation, which we derived previously, to characterize the mirror map in each case. For algebraic K3 surfaces, we solve the equation ...
[ "hep-th", "alg-geom", "math.AG" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
117998409
hep-ph/9412201
1994-12-01
ZFITTER -- An Analytical Program for Fermion Pair Production in e+e- Annihilation
We describe how to use ZFITTER, a program based on a semi-analytical approach to fermion pair production in e+e- annihilation and Bhabha scattering. A flexible treatment of complete ${\cal O}(\alpha)$ QED corrections, also including higher orders, allows for three calculational {\bf chains} with different realistic set...
[ "hep-ph" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "d bardin_1", "name": "D. Bardin", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "m bilenky_0", "name": "Mikhail Bilenky", "publication_history": null, "h_index": null, "num_papers": null, ...
null
15794415
hep-ex/9412004
1994-12-06
On the Kinematic Reconstruction of Deep Inelastic Scattering at HERA: the $\Sigma$ Method
We review and compare the reconstruction methods of the inclusive deep inelastic scattering variables used at HERA. We introduce a new prescription, the $\Sigma$ method, which allows to measure the structure function of the proton $F_2(x,Q^2)$ in a large kinematic domain, and in particular in the low x-low$Q^2$ region,...
[ "hep-ex" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
15301482
astro-ph/9412025
1994-12-07
Cosmic Background Anisotropies in CDM Cosmology
Cosmic microwave background (CMB) anisotropies and density fluctuations are calculated for flat cold dark matter (CDM) models with a wide range of parameters, i.e., $\Omega_0, h$ and $\Omega_B$ for both standard recombination and various epochs of reionization. Tables of the power spectrum of CMB anisotropies in the fo...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
16770694
alg-geom/9412007
1994-12-09
Characteristic classes and quadric bundles
We construct Euler and Stiefel-Whitney classes of vector bundles with quadratic form by analyzing the intersection theory of the associated quadric bundles. We also compute the Chow rings of quadric and isotropic flag bundles. Along the way, we prove a conjecture of Fulton on top Chern classes of maximal isotropic sub-...
[ "alg-geom", "math.AG" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
14633568
hep-ph/9412291
1994-12-13
Electroweak corrections to the toponium decay width
We discuss one-loop electroweak corrections to the decay width of toponium. We calculate the energy-level shifts by expanding around the solution of the Bethe-Salpeter equation in the instantaneous approximation, in analogy with the positronium case. We show that first-order electroweak effects are suppressed by at lea...
[ "hep-ph" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "g siopsis_1", "name": "George Siopsis", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null } ]
null
2215790
hep-th/9412146
1994-12-16
Becchi-Rouet-Stora-Tyutin quantization of a soliton model in 2+1 dimensions
The Becchi-Rouet-Stora-Tyutin (BRST) method is applied to the quantization of the solitons of the non-linear $O(3)$ model in $2+1$ dimensions. We show that this method allows for a simple and systematic treatment of zero-modes with a non-commuting algebra. We obtain the expression of the BRST hamiltonian and show that ...
[ "hep-th" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "j garrahan_1", "name": "Juan [\"P.\"] Garrahan", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "m kruczenski_2", "name": "Martíin Kruczenski", "publication_history": null, "h_index": null, "nu...
null
17057362
hep-ph/9412324
1994-12-19
Constraints on Form Factors For Exclusive Semileptonic Heavy to Light Meson Decays
We use rigorous QCD dispersion relations to derive model-independent bounds on the B -> pi l nu, D -> pi l nu and D -> K l nu form factors. These bounds are particularly restrictive when the value of the observable form factor at one or more kinematic points is assumed. With reasonable assumptions we find f_B < 195 MeV...
[ "hep-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
119073807
astro-ph/9412073
1994-12-20
The Connection between X-ray- and Radio-Selected BL Lacertae Objects
We explain the properties of X-ray selected BL Lacertae objects, under the assumption that they constitute the small minority of the BL Lac population with energy cutoff located in the UV/X-ray band, as suggested by their multifrequency spectra. In particular, we derive their X-ray luminosity function, log N-log S, and...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
19846364
gr-qc/9412071
1994-12-22
New Formalism for Numerical Relativity
We present a new formulation of the Einstein equations that casts them in an explicitly first order, flux-conservative, hyperbolic form. We show that this now can be done for a wide class of time slicing conditions, including maximal slicing, making it potentially very useful for numerical relativity. This development ...
[ "gr-qc" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
13975919
cond-mat/9412115
1994-12-28
Eddy diffusivities in scalar transport
Standard and anomalous transport in incompressible flow is investigated using multiscale techniques. Eddy-diffusivities emerge from the multiscale analysis through the solution of an auxiliary equation. From the latter it is derived an upper bound to eddy-diffusivities, valid for both static and time-dependent flow. Th...
[ "cond-mat", "chao-dyn", "comp-gas", "nlin.CD", "nlin.CG" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
17653160
hep-th/9412236
1994-12-30
Summing the Instantons: Quantum Cohomology and Mirror Symmetry in Toric Varieties
We use the gauged linear sigma model introduced by Witten to calculate instanton expansions for correlation functions in topological sigma models with target space a toric variety $V$ or a Calabi--Yau hypersurface $M \subset V$. In the linear model the instanton moduli spaces are relatively simple objects and the corre...
[ "hep-th", "alg-geom", "math.AG" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
47109072
cs/9501101
1994-12-31
Solving Multiclass Learning Problems via Error-Correcting Output Codes
Multiclass learning problems involve finding a definition for an unknown function f(x) whose range is a discrete set containing k &gt 2 values (i.e., k ``classes''). The definition is acquired by studying collections of training examples of the form [x_i, f (x_i)]. Existing approaches to multiclass learning problems in...
[ "cs.AI" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
14437836
math/9501224
1995-01-01
How many zeros of a random polynomial are real?
We provide an elementary geometric derivation of the Kac integral formula for the expected number of real zeros of a random polynomial with independent standard normally distributed coefficients. We show that the expected number of real zeros is simply the length of the moment curve $(1,t,\ldots,t^n)$ projected onto th...
[ "math.CA" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
13489234
astro-ph/9501005
1995-01-04
Gamma-Ray Transfer and Energy Deposition in Supernovae
Solutions to the energy-independent (gray) radiative transfer equations are compared to results of Monte Carlo simulations of the \Ni and \Co radioactive decay \GR energy deposition in supernovae. The comparison shows that an effective, purely absorptive, gray opacity, \KG $\sim (0.06 \pm 0.01)Y_e$ cm$^2$ g$^{-1}$, whe...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
15971536
cond-mat/9501025
1995-01-09
GENERALIZED CIRCULAR ENSEMBLE OF SCATTERING MATRICES FOR A CHAOTIC CAVITY WITH NON-IDEAL LEADS
We consider the problem of the statistics of the scattering matrix S of a chaotic cavity (quantum dot), which is coupled to the outside world by non-ideal leads containing N scattering channels. The Hamiltonian H of the quantum dot is assumed to be an M x N hermitian matrix with probability distribution P(H) ~ det[lamb...
[ "cond-mat" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
15258914
cond-mat/9501045
1995-01-12
On the Statistical Properties of the Large Time Zero Temperature Dynamics of the SK Model
In this note we study the zero temperature dynamics of the Sherrington Kirkppatric model and we investigate the statistical properties of the configurations that are obtained in the large time limit. We find that the replica symmetry is broken (in a weak sense). We also present some general considerations on the synchr...
[ "cond-mat" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
119353722
astro-ph/9501045
1995-01-13
Cosmic Microwave Background Polarization
Polarization of the cosmic microwave background, though not yet detected, provides a source of information about cosmological parameters complementary to temperature fluctuations. This paper provides a complete theoretical treatment of polarization fluctuations. After a discussion of the physics of polarization, the Bo...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
119457637
cond-mat/9501082
1995-01-18
Weight Space Structure and Internal Representations: a Direct Approach to Learning and Generalization in Multilayer Neural Network
We analytically derive the geometrical structure of the weight space in multilayer neural networks (MLN), in terms of the volumes of couplings associated to the internal representations of the training set. Focusing on the parity and committee machines, we deduce their learning and generalization capabilities both rein...
[ "cond-mat" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
83182
cond-mat/9501089
1995-01-19
Theory of Phase Ordering Kinetics
The theory of phase ordering dynamics -- the growth of order through domain coarsening when a system is quenched from the homogeneous phase into a broken-symmetry phase -- is reviewed, with the emphasis on recent developments. Interest will focus on the scaling regime that develops at long times after the quench. How c...
[ "cond-mat" ]
null
[ "target.author.publication_history.key_reference", "target.key_reference" ]
null
null
null
5662493
hep-th/9501096
1995-01-20
Topological Reduction of 4D SYM to 2D $\sigma$--Models
By considering a (partial) topological twisting of supersymmetric Yang-Mills compactified on a 2d space with `t Hooft magnetic flux turned on we obtain a supersymmetric $\sigma$-model in 2 dimensions. For N=2 SYM this maps Donaldson observables on products of two Riemann surfaces to quantum cohomology ring of moduli sp...
[ "hep-th" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
120573757
comp-gas/9501007
1995-01-22
A Method for Near-Equilibrium Discrete-Velocity Gas Flows
We present a simulation scheme for discrete-velocity gases based on {\em local thermodynamic equilibrium}. Exploiting the kinetic nature of discrete-velocity gases, in that context, results in a natural splitting of fluxes, and the resultant scheme strongly resembles the original processes. The kinetic nature of the sc...
[ "comp-gas", "nlin.CG" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "b nadiga_2", "name": "Balasubramanya [\"T.\"] Nadiga", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "d pullin_0", "name": "D. [\"I.\"] Pullin", "publication_history": null, "h_index": null, "...
null
121801082
comp-gas/9501008
1995-01-22
Shock structure in a nine-velocity gas
The exact structure of a shock is computed in a multiple-speed discrete-velocity gas, the nine-velocity gas, wherein the multiplicity of speeds ensures nontrivial thermodynamics. Obtained as a solution of the model Boltzmann equations, the procedure consists of tracking the shock as a trajectory of a three dimensional ...
[ "comp-gas", "nlin.CG" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "b nadiga_2", "name": "Balasubramanya [\"T.\"] Nadiga", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "b sturtevant_0", "name": "Bradford Sturtevant", "publication_history": null, "h_index": null, ...
null
17662741
cond-mat/9501102
1995-01-22
Testing Mode-Coupling Theory for a Supercooled Binary Lennard-Jones Mixture I: The van Hove Correlation Function
We report the results of a large scale computer simulation of a binary supercooled Lennard-Jones liquid. We find that at low temperatures the curves for the mean squared displacement of a tagged particle for different temperatures fall onto a master curve when they are plotted versus rescaled time $tD(T)$, where $D(T)$...
[ "cond-mat" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
55373648
comp-gas/9501010
1995-01-23
An Euler Solver Based on Locally Adaptive Discrete Velocities
A new discrete-velocity model is presented to solve the three-dimensional Euler equations. The velocities in the model are of an adaptive nature---both the origin of the discrete-velocity space and the magnitudes of the discrete-velocities are dependent on the local flow--- and are used in a finite volume context. The ...
[ "comp-gas", "nlin.CG" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "b nadiga_2", "name": "Balasubramanya [\"T.\"] Nadiga", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null } ]
null
17974919
hep-ex/9501012
1995-01-26
Measurement of multiplicity and momentum spectra in the current fragmentation region of the Breit frame at HERA
Charged particle production has been measured in Deep Inelastic Scattering (DIS) events using the ZEUS detector over a large range of $Q^2$ from 10 to $1280 {\rm\ GeV}^2$. The evolution with $Q$ of the charged multiplicity and scaled momentum has been investigated in the current fragmentation region of the Breit frame....
[ "hep-ex" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "m derrick_1", "name": "Malcolm Derrick", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "d krakauer_2", "name": "Daniel [\"Asher\"] Krakauer", "publication_history": null, "h_index": null, "num...
null
16872484
astro-ph/9502003
1995-02-01
Solar Neutrinos: Radiative Corrections in Neutrino-Electron Scattering Experiments
Radiative corrections to the electron recoil-energy spectra and to total cross sections are computed for neutrino-electron scattering by solar neutrinos. Radiative corrections change monotonically the electron recoil spectrum for incident \b8 neutrinos, with the relative probability of observing recoil electrons being ...
[ "astro-ph", "hep-ph", "nucl-th" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
18871422
hep-ex/9502002
1995-02-02
Study of D*(2010)+- Production in ep Collisions at HERA
We report the first observation of charmed mesons with the ZEUS detector at HERA using the decay channel ${\rm D}^{*+}\rightarrow (\Do \rightarrow {\rm K}^-\pi^+)\pi^+$ (+ c.c.). Clear signals in the mass difference $\Delta M$=$M$(D$^*$)--$M$(D$^0)$ as well as in the $M(K\pi)$ distribution at the D$^0$ mass are found. ...
[ "hep-ex" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "m derrick_1", "name": "Malcolm Derrick", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "d krakauer_2", "name": "Daniel [\"Asher\"] Krakauer", "publication_history": null, "h_index": null, "num...
null
10255016
cond-mat/9502011
1995-02-02
Viscosity of Quantum Hall Fluids
The viscosity of quantum fluids with an energy gap at zero temperature is non-dissipative and is related to the adiabatic curvature on the space of flat background metrics (which plays the role of the parameter space). For a quantum Hall fluid on two dimensional tori this viscosity is computed. In this case the average...
[ "cond-mat" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
118940154
astro-ph/9502028
1995-02-06
THE MINIMUM MASS RATIO OF W URSAE MAJORIS BINARIES
The minimum mass ratio for tidal stability of a contact binary containing two unevolved main-sequence stars is calculated to be $\qmin\simeq0.09$ in the case of a mostly radiative primary, and is higher if an appreciable fraction of the mass lies in a convective envelope. At least one observed system, AW UMa, has a mas...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
19012934
hep-ex/9502003
1995-02-06
Jet production in high Q^2 deep-inelastic eo scattering at HERA
Two-jet production in deep-inelastic electron-proton scattering has been studied for $160<Q^2<1280$~GeV$^2$, $0.01<x<0.1$ and $0.04<y<0.95$ with the ZEUS detector at HERA. The kinematic properties of the jets and the jet production rates are presented. The partonic scaling variables of the two-jet system and the rate o...
[ "hep-ex" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "m derrick_1", "name": "Malcolm Derrick", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "d krakauer_2", "name": "Daniel [\"Asher\"] Krakauer", "publication_history": null, "h_index": null, "num...
null
53335469
astro-ph/9502039
1995-02-07
Globular Clusters with Tidal Tails: Deep Two-Color Star Counts
We examine the outer structure of 12 Galactic globular clusters using star-count analyses. Deep, two-color, photographic photometry is used to select and count stars with colors and magnitudes consistent with cluster-specific, color-magnitude sequences. The resulting reduction in the number of contaminating foreground ...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
5369751
math/9502222
1995-02-09
Richman games
A Richman game is a combinatorial game in which, rather than alternating moves, the two players bid for the privilege of making the next move. We consider both the case where the players pay each other and the case where the players pay a neutral third party. We find optimal strategies considering both the case where t...
[ "math.CO" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
17589771
nucl-th/9502027
1995-02-09
Theories for multiple resonances
Two microscopic theories for multiple resonances in nuclei are compared, n-particle-hole RPA and quantized Time-Dependent Hartree-Fock (TDHF). The Lipkin-Meshkov-Glick model is used as test case. We find that quantized TDHF is superior in many respects, except for very small systems.
[ "nucl-th" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "d klakow_1", "name": "Dietrich Klakow", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "m weber_2", "name": "M [\"F\"] Weber", "publication_history": null, "h_index": null, "num_papers": null, ...
null
39646448
cond-mat/9502054
1995-02-13
Disorder-Driven Pretransitional Tweed in Martensitic Transformations
Defying the conventional wisdom regarding first--order transitions, {\it solid--solid displacive transformations} are often accompanied by pronounced pretransitional phenomena. Generally, these phenomena are indicative of some mesoscopic lattice deformation that ``anticipates'' the upcoming phase transition. Among thes...
[ "cond-mat", "mtrl-th" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
8378224
astro-ph/9502078
1995-02-16
A COMPARATIVE STUDY OF MORPHOLOGICAL CLASSIFICATIONS OF APM GALAXIES
We investigate the consistency of visual morphological classifications of galaxies by comparing classifications for 831 galaxies from six independent observers. The galaxies were classified on laser print copy images or on computer screen produced from scans with the Automated Plate Measuring (APM) machine. Classificat...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
16420215
math/9502238
1995-02-16
New constructions for covering designs
A $(v,k,t)$ {\em covering design}, or {\em covering}, is a family of $k$-subsets, called blocks, chosen from a $v$-set, such that each $t$-subset is contained in at least one of the blocks. The number of blocks is the covering's {\em size}, and the minimum size of such a covering is denoted by $C(v,k,t)$. This paper gi...
[ "math.CO" ]
null
[ "target.key_reference" ]
null
null
null
15775613
hep-ph/9502319
1995-02-16
Hard diffraction in hadron--hadron interactions and in photoproduction
Hard single diffractive processes are studied within the framework of the triple--Pomeron approximation. Using a Pomeron structure function motivated by Regge--theory we obtain parton distribution functions which do not obey momentum sum rule. Based on Regge-- factorization cross sections for hard diffraction are calcu...
[ "hep-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
119081239
cond-mat/9502076
1995-02-17
Bosonization rules in $1/2 +1$ dimensions
We derive the bosonization rules for free fermions on a half-line with physically sensible boundary conditions for Luttinger fermions. We use path-integral methods to calculate the bosonized fermionic currents on the half-line and derive their commutation relations for a system with a boundary. We compute the fermion d...
[ "cond-mat", "hep-th" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
17007706
gr-qc/9502040
1995-02-24
Gravitational waves from inspiralling compact binaries: Parameter estimation using second-post-Newtonian waveforms
The parameters of inspiralling compact binaries can be estimated using matched filtering of gravitational-waveform templates against the output of laser-interferometric gravitational-wave detectors. Using a recently calculated formula, accurate to second post-Newtonian (2PN) order [order $(v/c)^4$, where $v$ is the orb...
[ "gr-qc" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
18491384
gr-qc/9502041
1995-02-24
Purely Magnetic Spacetimes
Purely magnetic spacetimes, in which the Riemann tensor satisfies $R_{abcd}u^bu^d=0$ for some unit timelike vector $u^a$, are studied. The algebraic consequences for the Weyl and Ricci tensors are examined in detail and consideration given to the uniqueness of $u^a$. Some remarks concerning the nature of the congruence...
[ "gr-qc" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "b haddow_1", "name": "Barry Haddow", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null } ]
null
42826202
hep-ex/9503003
1995-03-03
Observation of the Top Quark
The DO collaboration reports on a search for the Standard Model top quark in pbar-p collisions at Sqrt(s)=1.8TeV at the Fermilab Tevatron, with an integrated luminosity of approximately 50pb-1. We have searched for t-tbar production in the dilepton and single-lepton decay channels, with and without tagging of b-quark j...
[ "hep-ex", "hep-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
5620421
cmp-lg/9503005
1995-03-03
A specification language for Lexical Functional Grammars
This paper defines a language L for specifying LFG grammars. This enables constraints on LFG's composite ontology (c-structures synchronised with f-structures) to be stated directly; no appeal to the LFG construction algorithm is needed. We use L to specify schemata annotated rules and the LFG uniqueness, completeness ...
[ "cmp-lg", "cs.CL" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "p blackburn_1", "name": "Patrick Blackburn", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "c gardent_1", "name": "Claire Gardent", "publication_history": null, "h_index": null, "num_papers": ...
null
14908618
q-alg/9503002
1995-03-05
Higher-dimensional Algebra and Topological Quantum Field Theory
The study of topological quantum field theories increasingly relies upon concepts from higher-dimensional algebra such as n-categories and n-vector spaces. We review progress towards a definition of n-category suited for this purpose, and outline a program in which n-dimensional TQFTs are to be described as n-category ...
[ "q-alg", "hep-th", "math.CT", "math.QA" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
119086244
hep-ex/9503005
1995-03-06
First Measurement of the Deep--Inelastic Structure of Proton Diffraction
A measurement is presented, using data taken with the H1 detector at HERA, of the contribution of diffractive interactions to deep-inelastic electron-proton scattering. The diffractive contribution to the proton structure function is evaluated as a function of the appropriate deep-inelastic scattering variables using a...
[ "hep-ex" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "t ahmed_8", "name": "T. Ahmed", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "s aid_1", "name": "S. Aid", "publication_history": null, "h_index": null, "num_papers": null, "num_citations"...
null
9593986
hep-th/9503030
1995-03-06
A WAY TO BREAK SUPERSYMMETRY
I study the spontaneous breakdown of supersymmetry when higher-dimensional Yang-Mills or the type-I $SO(32)$ string theory are compactified on magnetized tori. Because of the universal gyromagnetic ratio $g=2$, the splittings of all multiplets are given by the product of charge times internal helicity operators. As a r...
[ "hep-th" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
8305734
cond-mat/9503036
1995-03-07
Possible disordered ground states for close-packed polytypes and their diffraction patterns
It has recently been shown that one-dimensional Ising problems can have degenerate, disordered ground states (GSs) over a finite range of coupling onstants, ie, without `fine tuning'. The disorder is however of a special kind, consisting of arbitrary mixtures of a short-period structure and its symmetry-degenerate part...
[ "cond-mat" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
14449424
quant-ph/9503007
1995-03-08
Quantum Computers, Factoring, and Decoherence
In a quantum computer any superposition of inputs evolves unitarily into the corresponding superposition of outputs. It has been recently demonstrated that such computers can dramatically speed up the task of finding factors of large numbers -- a problem of great practical significance because of its cryptographic appl...
[ "quant-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
1065088
cmp-lg/9503009
1995-03-08
Distributional Part-of-Speech Tagging
This paper presents an algorithm for tagging words whose part-of-speech properties are unknown. Unlike previous work, the algorithm categorizes word tokens in context instead of word types. The algorithm is evaluated on the Brown Corpus.
[ "cmp-lg", "cs.CL" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
332033
cmp-lg/9503010
1995-03-09
Corpus-based Method for Automatic Identification of Support Verbs for Nominalizations
Nominalization is a highly productive phenomena in most languages. The process of nominalization ejects a verb from its syntactic role into a nominal position. The original verb is often replaced by a semantically emptied support verb (e.g., "make a proposal"). The choice of a support verb for a given nominalization is...
[ "cmp-lg", "cs.CL" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
32989568
cond-mat/9503055
1995-03-10
A Constrained Path Quantum Monte Carlo Method for Fermion Ground States
We propose a new quantum Monte Carlo algorithm to compute fermion ground-state properties. The ground state is projected from an initial wavefunction by a branching random walk in an over-complete basis space of Slater determinants. By constraining the determinants according to a trial wavefunction $|\Psi_T \rangle$, w...
[ "cond-mat" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
3033151
cmp-lg/9503016
1995-03-14
Natural Language Interfaces to Databases - An Introduction
This paper is an introduction to natural language interfaces to databases (NLIDBs). A brief overview of the history of NLIDBs is first given. Some advantages and disadvantages of NLIDBs are then discussed, comparing NLIDBs to formal query languages, form-based interfaces, and graphical interfaces. An introduction to so...
[ "cmp-lg", "cs.CL" ]
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": "g ritchie_1", "name": "Graeme [\"D.\"] Ritchie", "publication_history": null, "h_index": null, ...
null
14029134
gr-qc/9503024
1995-03-14
Lectures in (2+1)-Dimensional Gravity
These lectures briefly review our current understanding of classical and quantum gravity in three spacetime dimensions, concentrating on the quantum mechanics of closed universes and the (2+1)-dimensional black hole. Three formulations of the classical theory and three approaches to quantization are discussed in some d...
[ "gr-qc" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
17233373
hep-th/9503121
1995-03-20
Exactly Marginal Operators and Duality in Four Dimensional N=1 Supersymmetric Gauge Theory
We show that manifolds of fixed points, which are generated by exactly marginal operators, are common in N=1 supersymmetric gauge theory. We present a unified and simple prescription for identifying these operators, using tools similar to those employed in two-dimensional N=2 supersymmetry. In particular we rely on the...
[ "hep-th" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
8764584
quant-ph/9503016
1995-03-23
Elementary gates for quantum computation
We show that a set of gates that consists of all one-bit quantum gates (U(2)) and the two-bit exclusive-or gate (that maps Boolean values $(x,y)$ to $(x,x \oplus y)$) is universal in the sense that all unitary operations on arbitrarily many bits $n$ (U($2^n$)) can be expressed as compositions of these gates. We investi...
[ "quant-ph", "cond-mat", "hep-th" ]
null
[ "target.author.publication_history.key_reference", "target.key_reference" ]
null
null
null
15432906
hep-ph/9503425
1995-03-26
ANOMALOUS GAUGE BOSON INTERACTIONS
We discuss the direct measurement of the trilinear vector boson couplings in present and future collider experiments. The major goals of such experiments will be the confirmation of the Standard Model (SM) predictions and the search for signals of new physics. We review our current theoretical understanding of anomalou...
[ "hep-ph", "hep-ex" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
18391948
hep-ex/9503014
1995-03-27
Inclusive transverse momentum distributions of charged particles in diffractive and non--diffractive photoproduction at HERA
Inclusive transverse momentum spectra of charged particles in photoproduction events in the laboratory pseudorapidity range $-1.2<\eta<1.4$ have been measured up to $p_{T}=8\GeV $ using the ZEUS detector. Diffractive and non--diffractive reactions have been selected with an average $\gamma p$ centre of mass (c.m.) ener...
[ "hep-ex" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "m derrick_1", "name": "Malcolm Derrick", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "d krakauer_2", "name": "Daniel [\"Asher\"] Krakauer", "publication_history": null, "h_index": null, "num...
null
18506877
math/9503225
1995-03-27
Quantum symmetric spaces and related q-orthogonal polynomials
A class of quantum analogues of compact symmetric spaces of classical type is introduced by means of constant solutions to the reflection equations. Their zonal spherical functions are discussed in connection with $q$-orthogonal polynomials.
[ "math.QA", "math.CA" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
6117029
cond-mat/9503166
1995-03-31
The structural glass transition and the entropy of the metastable states
The metastable states of a glass are counted by adding a weak pinning field which explicitly breaks the ergodicity. Their entropy, that is the logarithm of their number, is extensive in a range of temperatures $T_G < T < T_C$ only, where $T_G$ and $T_C$ correspond to the ideal calorimetric and kinetic glass transition ...
[ "cond-mat" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
2646329
cmp-lg/9503025
1995-04-01
Co-occurrence Vectors from Corpora vs. Distance Vectors from Dictionaries
A comparison was made of vectors derived by using ordinary co-occurrence statistics from large text corpora and of vectors derived by measuring the inter-word distances in dictionary definitions. The precision of word sense disambiguation by using co-occurrence vectors from the 1987 Wall Street Journal (20M total words...
[ "cmp-lg", "cs.CL" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
56433838
chao-dyn/9504005
1995-04-07
Chronotopic Lyapunov Analysis: (I) a Comprehensive Characterization of 1D Systems
Instabilities in 1D spatially extended systems are studied with the aid of both temporal and spatial Lyapunov exponents. A suitable representation of the spectra allows a compact description of all the possible disturbances in tangent space. The analysis is carried out for chaotic and periodic spatiotemporal patterns. ...
[ "chao-dyn", "nlin.CD" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[]
[ { "author_id": "s lepri_2", "name": "Stefano Lepri", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "a politi_1", "name": "Antonio Politi", "publication_history": null, "h_index": null, "num_papers": null, ...
null
118883375
astro-ph/9504041
1995-04-12
The Structure of Dark Matter Haloes in Dwarf Galaxies
Recent observations indicate that dark matter haloes have flat central density profiles. Cosmological simulations with non-baryonic dark matter predict however self similar haloes with central density cusps. This contradiction has lead to the conclusion that dark matter must be baryonic. Here it is shown that the dark ...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
32229667
astro-ph/9504054
1995-04-18
Determination of Inflationary Observables by Cosmic Microwave Background Anisotropy Experiments
Inflation produces nearly Harrison-Zel'dovich scalar and tensor perturbation spectra which lead to anisotropy in the cosmic microwave background (CMB). The amplitudes and shapes of these spectra can be parametrized by $Q_S^2$, $r\equiv Q_T^2/Q_S^2$, $n_S$ and $n_T$ where $Q_S^2$ and $Q_T^2$ are the scalar and tensor co...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
18809981
cond-mat/9504090
1995-04-24
Boundary conditions for quantum lattice systems
For classical lattice systems, the Dobrushin-Lanford-Ruelle theory of boundary conditions states that the restriction of a global equilibrium state to a subsystem can be obtained as an integral over equilibrium states of the subsystem alone. The Hamiltonians for the subsystem are obtained by fixing a configuration for ...
[ "cond-mat", "quant-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
7018595
cmp-lg/9504020
1995-04-26
Computational Interpretations of the Gricean Maxims in the Generation of Referring Expressions
We examine the problem of generating definite noun phrases that are appropriate referring expressions; i.e, noun phrases that (1) successfully identify the intended referent to the hearer whilst (2) not conveying to her any false conversational implicatures (Grice, 1975). We review several possible computational interp...
[ "cmp-lg", "cs.CL" ]
null
[ "target.author.publication_history.key_reference", "target.key_reference" ]
null
null
null
317789
cmp-lg/9504025
1995-04-27
Discourse Processing of Dialogues with Multiple Threads
In this paper we will present our ongoing work on a plan-based discourse processor developed in the context of the Enthusiast Spanish to English translation system as part of the JANUS multi-lingual speech-to-speech translation system. We will demonstrate that theories of discourse which postulate a strict tree structu...
[ "cmp-lg", "cs.CL" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "c rosé_1", "name": "Carolyn [\"Penstein\"] Rosé", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "b di eugenio_1", "name": "Barbara [\"Maria\"] Di Eugenio", "publication_history": null, "h_index": ...
null
14527730
cmp-lg/9504034
1995-04-30
Bayesian Grammar Induction for Language Modeling
We describe a corpus-based induction algorithm for probabilistic context-free grammars. The algorithm employs a greedy heuristic search within a Bayesian framework, and a post-pass using the Inside-Outside algorithm. We compare the performance of our algorithm to n-gram models and the Inside-Outside algorithm in three ...
[ "cmp-lg", "cs.CL" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
7875478
cs/9505102
1995-04-30
Adaptive Load Balancing: A Study in Multi-Agent Learning
We study the process of multi-agent reinforcement learning in the context of load balancing in a distributed system, without use of either central coordination or explicit communication. We first define a precise framework in which to study adaptive load balancing, important features of which are its stochastic nature ...
[ "cs.AI" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "a schaerf_0", "name": "Andrea Schaerf", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "y shoham_1", "name": "Yoav Shoham", "publication_history": null, "h_index": null, "num_papers": null, ...
null
7545024
cs/9505101
1995-04-30
Using Pivot Consistency to Decompose and Solve Functional CSPs
Many studies have been carried out in order to increase the search efficiency of constraint satisfaction problems; among them, some make use of structural properties of the constraint network; others take into account semantic properties of the constraints, generally assuming that all the constraints possess the given ...
[ "cs.AI" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
17053285
adap-org/9504007
1995-05-04
The Distributed Genetic Algorithm Revisited
This paper extends previous work done by Tanese on the distributed genetic algorithm (DGA). Tanese found that the DGA outperformed the canonical serial genetic algorithm (CGA) on a class of difficult, randomly-generated Walsh polynomials. This left open the question of whether the DGA would have similar success on func...
[ "adap-org", "nlin.AO" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
55606657
astro-ph/9505023
1995-05-04
A Supernova at z = 0.458 and Implications for Measuring the Cosmological Deceleration
We have begun a program to discover high-redshift supernovae ($z \approx$ 0.25--0.5), and study them with follow-up photometry and spectroscopy. We report here our first discovery, a supernova at $z = 0.458$. The photometry for this supernova closely matches the lightcurve calculated for this redshift from the template...
[ "astro-ph" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[]
[ { "author_id": "s perlmutter_1", "name": "Saul Perlmutter", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "c pennypacker_1", "name": "Carlton [\"R.\"] Pennypacker", "publication_history": null, "h_index": null, ...
null