id large_stringlengths 9 16 | title large_stringlengths 1 382 | abstract large_stringlengths 3 6.09k | publish_date date32 | update_date date32 | categories large listlengths 1 13 | authors large_stringlengths 3 62.8k |
|---|---|---|---|---|---|---|
cmp-lg/9405023 | An Integrated Heuristic Scheme for Partial Parse Evaluation | GLR* is a recently developed robust version of the Generalized LR Parser,
that can parse almost ANY input sentence by ignoring unrecognizable parts of
the sentence. On a given input sentence, the parser returns a collection of
parses that correspond to maximal, or close to maximal, parsable subsets of the
original inpu... | 1994-05-26 | 2008-02-03 | [
"cmp-lg",
"cs.CL"
] | Alon Lavie (School of Computer Science, Carnegie Mellon University) |
cmp-lg/9405024 | Abductive Equivalential Translation and its application to Natural
Language Database Interfacing | The thesis describes a logical formalization of natural-language database
interfacing. We assume the existence of a ``natural language engine'' capable
of mediating between surface linguistic string and their representations as
``literal'' logical forms: the focus of interest will be the question of
relating ``literal'... | 1994-05-26 | 2008-02-03 | [
"cmp-lg",
"cs.CL"
] | Manny Rayner |
cmp-lg/9405025 | An Optimal Tabular Parsing Algorithm | In this paper we relate a number of parsing algorithms which have been
developed in very different areas of parsing theory, and which include
deterministic algorithms, tabular algorithms, and a parallel algorithm. We show
that these algorithms are based on the same underlying ideas. By relating
existing ideas, we hope ... | 1994-05-26 | 2008-02-03 | [
"cmp-lg",
"cs.CL"
] | Mark-Jan Nederhof (University of Nijmegen) |
cmp-lg/9405022 | Grammar Specialization through Entropy Thresholds | Explanation-based generalization is used to extract a specialized grammar
from the original one using a training corpus of parse trees. This allows very
much faster parsing and gives a lower error rate, at the price of a small loss
in coverage. Previously, it has been necessary to specify the tree-cutting
criteria (or ... | 1994-05-25 | 2008-02-03 | [
"cmp-lg",
"cs.CL"
] | Christer Samuelsson (Swedish Institute of Computer Science) |
cmp-lg/9405020 | Capturing CFLs with Tree Adjoining Grammars | We define a decidable class of TAGs that is strongly equivalent to CFGs and
is cubic-time parsable. This class serves to lexicalize CFGs in the same manner
as the LCFGs of Schabes and Waters but with considerably less restriction on
the form of the grammars. The class provides a normal form for TAGs that
generate local... | 1994-05-24 | 2008-02-03 | [
"cmp-lg",
"cs.CL"
] | James Rogers (Univ. of Delaware) |
cmp-lg/9405021 | Generating Precondition Expressions in Instructional Text | This study employs a knowledge intensive corpus analysis to identify the
elements of the communicative context which can be used to determine the
appropriate lexical and grammatical form of instructional texts. \ig, an
instructional text generation system based on this analysis, is presented,
particularly with referenc... | 1994-05-24 | 2008-02-03 | [
"cmp-lg",
"cs.CL"
] | Keith Vander Linden (ITRI, University of Brighton) |
cmp-lg/9405019 | Determination of referential property and number of nouns in Japanese
sentences for machine translation into English | When translating Japanese nouns into English, we face the problem of articles
and numbers which the Japanese language does not have, but which are necessary
for the English composition. To solve this difficult problem we classified the
referential property and the number of nouns into three types respectively.
This pap... | 1994-05-19 | 2008-02-03 | [
"cmp-lg",
"cs.CL"
] | Masaki Murata, Makoto Nagao |
cmp-lg/9405018 | Memory-Based Lexical Acquisition and Processing | Current approaches to computational lexicology in language technology are
knowledge-based (competence-oriented) and try to abstract away from specific
formalisms, domains, and applications. This results in severe complexity,
acquisition and reusability bottlenecks. As an alternative, we propose a
particular performance... | 1994-05-16 | 2008-02-03 | [
"cmp-lg",
"cs.CL"
] | Walter Daelemans |
cmp-lg/9405016 | Precise n-gram Probabilities from Stochastic Context-free Grammars | We present an algorithm for computing n-gram probabilities from stochastic
context-free grammars, a procedure that can alleviate some of the standard
problems associated with n-grams (estimation from sparse data, lack of
linguistic structure, among others). The method operates via the computation of
substring expectati... | 1994-05-10 | 2022-02-28 | [
"cmp-lg",
"cs.CL"
] | Andreas Stolcke (ICSI, Berkeley, CA), Jonathan Segal (ICSI, Berkeley,
CA) |
cmp-lg/9405017 | Best-first Model Merging for Hidden Markov Model Induction | This report describes a new technique for inducing the structure of Hidden
Markov Models from data which is based on the general `model merging' strategy
(Omohundro 1992). The process begins with a maximum likelihood HMM that
directly encodes the training data. Successively more general models are
produced by merging H... | 1994-05-10 | 2008-02-03 | [
"cmp-lg",
"cs.CL"
] | Andreas Stolcke (ICSI, Berkeley, CA), Stephen M. Omohundro (ICSI,
Berkeley, CA) |
cmp-lg/9405014 | Classifying Cue Phrases in Text and Speech Using Machine Learning | Cue phrases may be used in a discourse sense to explicitly signal discourse
structure, but also in a sentential sense to convey semantic rather than
structural information. This paper explores the use of machine learning for
classifying cue phrases as discourse or sentential. Two machine learning
programs (Cgrendel and... | 1994-05-09 | 2008-02-03 | [
"cmp-lg",
"cs.CL"
] | Diane J. Litman (AT&T Bell Laboratories, Murray Hill, NJ) |
cmp-lg/9405015 | Intention-based Segmentation: Human Reliability and Correlation with
Linguistic Cues | Certain spans of utterances in a discourse, referred to here as segments, are
widely assumed to form coherent units. Further, the segmental structure of
discourse has been claimed to constrain and be constrained by many phenomena.
However, there is weak consensus on the nature of segments and the criteria for
recognizi... | 1994-05-09 | 2008-02-03 | [
"cmp-lg",
"cs.CL"
] | Rebecca J. Passonneau (Department of Computer Science, Columbia
University, New York), Diane J. Litman (AT&T Bell Laboratories, Murray Hill,
NJ) |
cmp-lg/9405012 | Integration Of Visual Inter-word Constraints And Linguistic Knowledge In
Degraded Text Recognition | Degraded text recognition is a difficult task. Given a noisy text image, a
word recognizer can be applied to generate several candidates for each word
image. High-level knowledge sources can then be used to select a decision from
the candidate set for each word image. In this paper, we propose that visual
inter-word co... | 1994-05-06 | 2008-02-03 | [
"cmp-lg",
"cs.CL"
] | Tao Hong (Center of Excellence for Document Analysis and Recognition,
Department of Computer Science, State University of New York at Buffalo) |
cmp-lg/9405013 | Collaboration on reference to objects that are not mutually known | In conversation, a person sometimes has to refer to an object that is not
previously known to the other participant. We present a plan-based model of how
agents collaborate on reference of this sort. In making a reference, an agent
uses the most salient attributes of the referent. In understanding a reference,
an agent... | 1994-05-06 | 2008-02-03 | [
"cmp-lg",
"cs.CL"
] | Philip G. Edmonds |
cmp-lg/9405011 | A Plan-Based Model for Response Generation in Collaborative
Task-Oriented Dialogues | This paper presents a plan-based architecture for response generation in
collaborative consultation dialogues, with emphasis on cases in which the
system (consultant) and user (executing agent) disagree. Our work contributes
to an overall system for collaborative problem-solving by providing a
plan-based framework that... | 1994-05-05 | 2008-02-03 | [
"cmp-lg",
"cs.CL"
] | Jennifer Chu-Carroll (University of Delaware) and Sandra Carberry
(University of Delaware) |
cmp-lg/9405004 | Syntactic-Head-Driven Generation | The previously proposed semantic-head-driven generation methods run into
problems if none of the daughter constituents in the syntacto-semantic rule
schemata of a grammar fits the definition of a semantic head given in Shieber
et al. 1990. This is the case for the semantic analysis rules of certain
constraint-based sem... | 1994-05-03 | 2008-02-03 | [
"cmp-lg",
"cs.CL"
] | Esther Koenig (Institute for Computational Linguistics, Stuttgart
University) |
cmp-lg/9405009 | Natural Language Parsing as Statistical Pattern Recognition | Traditional natural language parsers are based on rewrite rule systems
developed in an arduous, time-consuming manner by grammarians. A majority of
the grammarian's efforts are devoted to the disambiguation process, first
hypothesizing rules which dictate constituent categories and relationships
among words in ambiguou... | 1994-05-03 | 2016-08-31 | [
"cmp-lg",
"cs.CL"
] | David M. Magerman |
cmp-lg/9405007 | Towards History-based Grammars: Using Richer Models for Probabilistic
Parsing | We describe a generative probabilistic model of natural language, which we
call HBG, that takes advantage of detailed linguistic information to resolve
ambiguity. HBG incorporates lexical, syntactic, semantic, and structural
information from the parse tree into the disambiguation process in a novel way.
We use a corpus... | 1994-05-03 | 2008-02-03 | [
"cmp-lg",
"cs.CL"
] | Ezra Black, Fred Jelinek, John Lafferty, David M. Magerman, Robert
Mercer, and Salim Roukos |
cmp-lg/9405008 | A Stochastic Finite-State Word-Segmentation Algorithm for Chinese | We present a stochastic finite-state model for segmenting Chinese text into
dictionary entries and productively derived words, and providing pronunciations
for these words; the method incorporates a class-based model in its treatment
of personal names. We also evaluate the system's performance, taking into
account the ... | 1994-05-03 | 2008-02-03 | [
"cmp-lg",
"cs.CL"
] | Richard Sproat (AT&T Bell Laboratories), Chilin Shih (AT&T Bell
Laboratories), William Gale (AT&T Bell Laboratories), and Nancy Chang
(Harvard University) |
cmp-lg/9405006 | Efficiency, Robustness, and Accuracy in Picky Chart Parsing | This paper describes Picky, a probabilistic agenda-based chart parsing
algorithm which uses a technique called {\em probabilistic prediction} to
predict which grammar rules are likely to lead to an acceptable parse of the
input. Using a suboptimal search method, Picky significantly reduces the number
of edges produced ... | 1994-05-03 | 2008-02-03 | [
"cmp-lg",
"cs.CL"
] | David M. Magerman and Carl Weir |
cmp-lg/9405010 | Common Topics and Coherent Situations: Interpreting Ellipsis in the
Context of Discourse Inference | It is claimed that a variety of facts concerning ellipsis, event reference,
and interclausal coherence can be explained by two features of the linguistic
form in question: (1) whether the form leaves behind an empty constituent in
the syntax, and (2) whether the form is anaphoric in the semantics. It is
proposed that t... | 1994-05-03 | 2008-02-03 | [
"cmp-lg",
"cs.CL"
] | Andrew Kehler (Harvard University) |
cmp-lg/9405005 | Pearl: A Probabilistic Chart Parser | This paper describes a natural language parsing algorithm for unrestricted
text which uses a probability-based scoring function to select the "best" parse
of a sentence. The parser, Pearl, is a time-asynchronous bottom-up chart parser
with Earley-type top-down prediction which pursues the highest-scoring theory
in the ... | 1994-05-03 | 2008-02-03 | [
"cmp-lg",
"cs.CL"
] | David M. Magerman and Mitchell P. Marcus |
cmp-lg/9405002 | Temporal Relations: Reference or Discourse Coherence? | The temporal relations that hold between events described by successive
utterances are often left implicit or underspecified. We address the role of
two phenomena with respect to the recovery of these relations: (1) the
referential properties of tense, and (2) the role of temporal constraints
imposed by coherence relat... | 1994-05-02 | 2008-02-03 | [
"cmp-lg",
"cs.CL"
] | Andrew Kehler (Harvard University) |
cmp-lg/9405003 | Some Bibliographical References on Intonation and Intonational Meaning | A by-no-means-complete collection of references for those interested in
intonational meaning, with other miscellaneous references on intonation
included. Additional references are welcome, and should be sent to
julia@research.att.com. | 1994-05-02 | 2008-02-03 | [
"cmp-lg",
"cs.CL"
] | Julia Hirschberg (AT&T Bell Laboratories) |
cmp-lg/9405001 | Similarity-Based Estimation of Word Cooccurrence Probabilities | In many applications of natural language processing it is necessary to
determine the likelihood of a given word combination. For example, a speech
recognizer may need to determine which of the two word combinations ``eat a
peach'' and ``eat a beach'' is more likely. Statistical NLP methods determine
the likelihood of a... | 1994-05-02 | 2008-02-03 | [
"cmp-lg",
"cs.CL"
] | Ido Dagan (AT&T Bell Laboratories, Murray Hill, NJ 07974, USA),
Fernando Pereira (AT&T Bell Laboratories, Murray Hill, NJ 07974, USA),
Lillian Lee (DAS, Harvard University, Cambridge MA 02138, USA) |
cmp-lg/9404011 | Adjuncts and the Processing of Lexical Rules | The standard HPSG analysis of Germanic verb clusters can not explain the
observed narrow-scope readings of adjuncts in such verb clusters. We present an
extension of the HPSG analysis that accounts for the systematic ambiguity of
the scope of adjuncts in verb cluster constructions, by treating adjuncts as
members of th... | 1994-04-28 | 2008-02-03 | [
"cmp-lg",
"cs.CL"
] | Gertjan van Noord (BCN RUG Groningen), Gosse Bouma (BCN RUG Groningen) |
cmp-lg/9404009 | A Deductive Account of Quantification in LFG | The relationship between Lexical-Functional Grammar (LFG) functional
structures (f-structures) for sentences and their semantic interpretations can
be expressed directly in a fragment of linear logic in a way that explains
correctly the constrained interactions between quantifier scope ambiguity and
bound anaphora. The... | 1994-04-27 | 2008-02-03 | [
"cmp-lg",
"cs.CL"
] | Mary Dalrymple (Xerox PARC, Palo Alto CA), John Lamping (Xerox PARC,
Palo Alto CA), Fernando Pereira (AT&T Bell Laboratories, Murray Hill NJ),
Vijay Saraswat (Xerox PARC, Palo Alto CA) |
cmp-lg/9404010 | Intensional Verbs Without Type-Raising or Lexical Ambiguity | We present an analysis of the semantic interpretation of intensional verbs
such as seek that allows them to take direct objects of either individual or
quantifier type, producing both de dicto and de re readings in the quantifier
case, all without needing to stipulate type-raising or quantifying-in rules.
This simple a... | 1994-04-27 | 2008-02-03 | [
"cmp-lg",
"cs.CL"
] | Mary Dalrymple (Xerox PARC, Palo Alto CA), John Lamping (Xerox PARC,
Palo Alto CA), Fernando Pereira (AT&T Bell Laboratories, Murray Hill NJ),
Vijay Saraswat (Xerox PARC, Palo Alto CA) |
cmp-lg/9404008 | Principles and Implementation of Deductive Parsing | We present a system for generating parsers based directly on the metaphor of
parsing as deduction. Parsing algorithms can be represented directly as
deduction systems, and a single deduction engine can interpret such deduction
systems so as to implement the corresponding parser. The method generalizes
easily to parsers... | 1994-04-26 | 2008-02-03 | [
"cmp-lg",
"cs.CL"
] | Stuart M. Shieber (Harvard University), Yves Schabes (Mitsubishi
Electric Research Laboratories), and Fernando C. N. Pereira (AT&T Bell
Laboratories) |
cmp-lg/9404007 | Constraint-Based Categorial Grammar | We propose a generalization of Categorial Grammar in which lexical categories
are defined by means of recursive constraints. In particular, the introduction
of relational constraints allows one to capture the effects of (recursive)
lexical rules in a computationally attractive manner. We illustrate the
linguistic merit... | 1994-04-19 | 2008-02-03 | [
"cmp-lg",
"cs.CL"
] | Gosse Bouma (Alfa-Informatica, Rijksuniversiteit Groningen), Gertjan
van Noord (Alfa-Informatica, Rijksuniversiteit Groningen) |
cmp-lg/9404006 | SPANISH 1992 (S92): corpus-based analysis of present-day Spanish for
medical purposes | S92 research was begun in 1987 to analyze word frequencies in present-day
Spanish for making speech pathology evaluation tools. 500 2,000-word samples of
children, adolescents and adults' language were input between 1988-1991,
calculations done in 1992; statistical and Lewandowski analyses were carried
out in 1993. | 1994-04-15 | 2008-02-03 | [
"cmp-lg",
"cs.CL"
] | R.M. CHANDLER-BURNS (Medical College, Autonomous University of Nuevo
Leon, Monterrey, Mexico) |
cmp-lg/9404005 | Memoization in Constraint Logic Programming | This paper shows how to apply memoization (caching of subgoals and associated
answer substitutions) in a constraint logic programming setting. The research
is is motivated by the desire to apply constraint logic programming (CLP) to
problems in natural language processing that involve (constraint) interleaving
or corou... | 1994-04-11 | 2008-02-03 | [
"cmp-lg",
"cs.CL"
] | Mark Johnson (Brown University) |
cmp-lg/9404004 | An Empirically Motivated Reinterpretation of Dependency Grammar | Dependency grammar is usually interpreted as equivalent to a strict form of
X--bar theory that forbids the stacking of nodes of the same bar level (e.g.,
N' immediately dominating N' with the same head). But adequate accounts of
_one_--anaphora and of the semantics of multiple modifiers require such
stacking and accord... | 1994-04-06 | 2008-02-03 | [
"cmp-lg",
"cs.CL"
] | Michael A. Covington (University of Georgia) |
cmp-lg/9404003 | Restricting the Weak-Generative Capacity of Synchronous Tree-Adjoining
Grammars | The formalism of synchronous tree-adjoining grammars, a variant of standard
tree-adjoining grammars (TAG), was intended to allow the use of TAGs for
language transduction in addition to language specification. In previous work,
the definition of the transduction relation defined by a synchronous TAG was
given by appeal... | 1994-04-04 | 2008-02-03 | [
"cmp-lg",
"cs.CL"
] | Stuart M. Shieber (Harvard University) |
cmp-lg/9404002 | Lessons from a Restricted Turing Test | We report on the recent Loebner prize competition inspired by Turing's test
of intelligent behavior. The presentation covers the structure of the
competition and the outcome of its first instantiation in an actual event, and
an analysis of the purpose, design, and appropriateness of such a competition.
We argue that th... | 1994-04-04 | 2008-02-03 | [
"cmp-lg",
"cs.CL"
] | Stuart M. Shieber |
cmp-lg/9404001 | An Alternative Conception of Tree-Adjoining Derivation | The precise formulation of derivation for tree-adjoining grammars has
important ramifications for a wide variety of uses of the formalism, from
syntactic analysis to semantic interpretation and statistical language
modeling. We argue that the definition of tree-adjoining derivation must be
reformulated in order to mani... | 1994-04-04 | 2009-09-25 | [
"cmp-lg",
"cs.CL"
] | Yves Schabes and Stuart M. Shieber |
comp-gas/9411001 | Renormalization of Lattice Gas Transport Coefficients | A method is described for calculating corrections to the
Boltzmann/Chapman-Enskog analysis of lattice gases due to the buildup of
correlations. It is shown that renormalized transport coefficients can be
calculated perturbatively by summing terms in an infinite series. A
diagrammatic notation for the terms in this seri... | 1994-12-01 | 2008-02-03 | [
"comp-gas",
"hep-lat",
"nlin.CG"
] | Bruce M. Boghosian (Center for Computational Science, Boston
University), Washington Taylor (Center for Theoretical Physics, Massachusetts
Institute of Technology) |
comp-gas/9410001 | Deterministic Chaos in Tropical Atmospheric Dynamics | We examine an 11-year data set from the tropical weather station of Tlaxcala,
Mexico. We find that mutual information drops quickly with the delay, to a
positive value which relaxes to zero with a time scale of 20 days. We also
examine the mutual dependence of the observables and conclude that the data set
gives the eq... | 1994-10-17 | 2009-10-22 | [
"comp-gas",
"nlin.CG"
] | H. Waelbroeck (Instituto de Ciencias Nucleares, Universidad Nacional
Autonoma de Mexico) |
comp-gas/9408002 | Heat Transfer in Lattice BGK Modeled Fluid | The thermal lattice BGK model is a recently suggested numerical tool which
aims to simulate thermohydrodynamic problems. We investigate the quality of the
lattice BGK simulation by calculating the temperature profiles in the Couette
flow under different Eckert and Mach numbers. A revised lower order model is
proposed a... | 1994-09-02 | 2009-10-22 | [
"comp-gas",
"nlin.CG"
] | Y. Chen, H. Ohashi and M. Akiyama (Department of Quantum Engineering
and Systems Science Faculty of Engineering, University of Tokyo) |
comp-gas/9408001 | Recognition of Temporal Sequences of Patterns | Using an asymmetric associative network with synchronous updating, it is
possible to recall a sequence of patterns. To obtain a stable sequence
generation with a large storage capacity, we introduce a threshold that
eliminates the contribution of weakly correlated patterns. For this system we
find a set of evolution eq... | 1994-08-26 | 2008-02-03 | [
"comp-gas",
"nlin.CG"
] | F. Zertuche (IIMAS, UNAM, Mexico), R. L\'opez-Pe\~na (ICN, UNAM,
Mexico) and H. Waelbroeck (ICN, UNAM, Mexico) |
comp-gas/9407003 | Nonlinear Analysis of Experimental Noisy Time Series in Fluidized Bed
Systems | The paper describes the application of some numerical techniques to analyze
and to characterize the observed dynamical behaviour of fluidized bed systems.
The preliminary results showed clearly that the dynamics of the considered
process can be nonrecurrent and governed by chaotic deterministic rules rather
than by sto... | 1994-08-02 | 2016-08-31 | [
"comp-gas",
"nlin.CG"
] | E. Caputo, S. Sello (Cise-Innovative Technologies, Milan Italy); V.
Marcolongo (Vela Srl, Milan Italy) |
comp-gas/9407002 | Cellular Automaton for Realistic Modelling of Landslides | A numerical model is developed for the simulation of debris flow in
landslides over a complex three dimensional topography. The model is based on a
lattice, in which debris can be transferred among nearest neighbors according
to established empirical relationships for granular flows. The model is then
validated by comp... | 1994-07-15 | 2020-01-29 | [
"comp-gas",
"nlin.CG"
] | Enrico Segre, Istituto di Cosmogeofisica, CNR, Torino, Italy and
Chiara Deangeli, Dipartimento di Georisorse e Territorio, Politecnico,
Torino, Italy |
comp-gas/9407001 | Flow in the Driven Cavity Calculated by the Lattice Boltzmann Method | The lattice Boltzmann method with enhanced collisions and rest particles is
used to calculate the flow in a two-dimensional lid-driven cavity. The
abilitity of this method to compute the velocity and the pressure of an
incompressible fluid in a geometry with Dirichlet and Neumann boundary
conditions is verified by calc... | 1994-07-08 | 2009-10-22 | [
"comp-gas",
"nlin.CG"
] | W. Miller (CRS4 - Centre for Advanced Studies, Research and
Developement, Cagliari, Italy) |
comp-gas/9406002 | Testing For Nonlinearity Using Redundancies: Quantitative and
Qualitative Aspects | A method for testing nonlinearity in time series is described based on
information-theoretic functionals -- redundancies, linear and nonlinear forms
of which allow either qualitative, or, after incorporating the surrogate data
technique, quantitative evaluation of dynamical properties of scrutinized data.
An interplay ... | 1994-06-30 | 2015-06-24 | [
"comp-gas",
"nlin.CG"
] | Milan PALUS (Santa Fe Institute) |
comp-gas/9406001 | Theoretical approach to two-dimensional traffic flow models | In this paper we present a theoretical analysis of a recently proposed
two-dimensional Cellular Automata model for traffic flow in cities with the
novel ingredient of turning capability. Numerical simulations of this model
show that there is a transition between a freely moving phase with high
velocity to a jammed stat... | 1994-06-24 | 2009-10-22 | [
"comp-gas",
"adap-org",
"cond-mat",
"nlin.AO",
"nlin.CG"
] | J.M. Molera, F.C. Martinez, J.A. Cuesta (Universidad Carlos III,
Madrid, Spain) and R. Brito (Universidad Complutense, Madrid, Spain) |
comp-gas/9405007 | Abstracts for the June 27-29 Princeton Conference: Discrete Models for
Fluid Mechanics | Submitted by the authors for the June 27-29 Princeton Conference. Questions
should be directed to: qian@cfd.princeton.edu | 1994-05-30 | 2008-02-03 | [
"comp-gas",
"nlin.CG"
] | Yue-Hong Qian |
comp-gas/9405005 | The correlation dimension of differenced data | The effect differencing has on the estimated correlation dimension of a
nongaussian time series is discussed. Two different methods for generating
surrogate data sets are compared. The results suggest that any filtering should
be applied to both the raw and surrogate time series, otherwise spurious
results can occur. | 1994-05-27 | 2009-10-22 | [
"comp-gas",
"nlin.CG"
] | Dean Prichard (Univ. of Alaska and LANL) |
comp-gas/9405006 | Generalized redundancies for time series analysis | Extensions to various information theoretic quantities used for nonlinear
time series analysis are discussed, as well as their relationship to the
generalized correlation integral. It is shown that calculating redundancies
from the correlation integral can be more accurate and more efficient than
direct box counting me... | 1994-05-27 | 2015-06-24 | [
"comp-gas",
"nlin.CG"
] | Dean Prichard (Univ. of Alaska and LANL) and James Theiler (LANL and
SFI) |
comp-gas/9405004 | A Class of Fast Methods for Processing Irregularly Sampled or Otherwise
Inhomogeneous One-Dimensional Data | With the ansatz that a data set's correlation matrix has a certain
parametrized form (one general enough, however, to allow the arbitrary
specification of a slowly-varying decorrelation distance and population
variance) the general machinery of Wiener or optimal filtering can be reduced
from $O(n^3)$ to $O(n)$ operatio... | 1994-05-20 | 2009-10-22 | [
"comp-gas",
"astro-ph",
"nlin.CG"
] | George B. Rybicki and William H. Press (Harvard-Smithsonian Center for
Astrophysics) |
comp-gas/9405003 | Growth Kinetics in Multicomponent Fluids | The hydrodynamic effects on the late stage kinetics in spinodal decomposition
of multicomponent fluids are examined using a lattice Boltzmann scheme with
stochastic fluctuations in the fluid and at the interface. In two dimensions,
the three and four component immiscible fluid mixture (with a $1024^2$ lattice)
behaves ... | 1994-05-18 | 2009-10-22 | [
"comp-gas",
"nlin.CG"
] | Shiyi Chen and Turab Lookman (Theoretical Division and Center for
Nonlinear Studies, Los Alamos National Laboratory, Los Alamos NM) |
comp-gas/9405002 | Generating surrogate data for time series with several simultaneously
measured variables | We propose an extension to multivariate time series of the phase-randomized
Fourier-transform algorithm for generating surrogate data. Such surrogate data
sets must mimic not only the autocorrelations of each of the variables in the
original data set, they must mimic the cross-correlations {\em between} all the
variabl... | 1994-05-12 | 2009-10-22 | [
"comp-gas",
"nlin.CG"
] | Dean Prichard (Univ. of Alaska and LANL) James Theiler (SFI AND LANL) |
comp-gas/9405001 | Lattice Gas Automata: a discrete model for simulation of continuous
transport phenomena in packages of agricultural products | A Lattice Boltzmann scheme has been applied to the problem of heat and mass
transport in packagings of cut flowers.
The LB scheme, simulating convection-diffusion processes and heat and mass
transfer between flowers and air flow, is described in detail. The objective of
the research programme is to optimize the packa... | 1994-05-03 | 2008-02-03 | [
"comp-gas",
"nlin.CG"
] | R.G.M. van der Sman (ATO-DLO, Agricultural Research Institute,
Holland), M.F.M. Janssens (ATO-DLO) |
comp-gas/9404002 | Generalized Boltzmann Equation for Lattice Gas Automata | In this paper, for the first time a theory is formulated that predicts
velocity and spatial correlations between occupation numbers that occur in
lattice gas automata violating semi-detailed balance. Starting from a coupled
BBGKY hierarchy for the $n$-particle distribution functions, cluster expansion
techniques are us... | 1994-04-26 | 2009-10-22 | [
"comp-gas",
"nlin.CG"
] | H.J. Bussemaker, M.H. Ernst, and J.W. Dufty |
comp-gas/9404001 | Transforming Signs to Phase Distributions in Quantum Simulations | A method is developed which speeds up averaging in quantum simulations where
minus signs cause difficulties. A Langevin equation method in conjunction with
a replication algorithm is used enabling one to average over a continuously
varying complex number. Instead of ensemble averaging this number directly, the
phase of... | 1994-04-14 | 2009-10-22 | [
"comp-gas",
"cond-mat",
"nlin.CG"
] | J.M. Deutsch ( University of California Santa Cruz) |
comp-gas/9403006 | Application of Complex Daubechies' Wavelets to Numerical Simulation of a
Nonlinear Signal Propagation Model | We report the first application of complex symmetric wavelets to the
numerical simulation of a nonlinear signal propagation model. This model is the
so-called nonlinear Schrodinger equation that describes, for instance, the
evolution of the electric field amplitude in nonlinear optical fibers. We
propose and study a ne... | 1994-03-31 | 2008-02-03 | [
"comp-gas",
"nlin.CG"
] | L. Gagnon, J. M. Lina and B. Goulard (Groupe PHYSNUM, Univ. de
Montreal) |
comp-gas/9403005 | Lattice-Gas Automata Fluids on Parallel Supercomputers | A condensed history and theoretical development of lattice-gas automata in
the Boltzmann limit is presented. This is provided as background to set up the
context for understanding the implementation of the lattice-gas method on two
parallel supercomputers: the MIT cellular automata machine CAM-8 and the
Connection Mach... | 1994-03-19 | 2008-02-03 | [
"comp-gas",
"nlin.CG"
] | Jeffrey Yepez (US Air Force, Phillips Laboratory), Guy P. Seeley
(Radex Corporation), and Norman Margolus (MIT Laboratory for Computer
Science) |
comp-gas/9403004 | A Lattice-Gas with Long-Range Interactions Coupled to a Heat Bath | Introduced is a lattice-gas with long-range 2-body interactions. An effective
inter-particle force is mediated by momentum exchanges. There exists the
possibility of having both attractive and repulsive interactions using finite
impact parameter collisions. There also exists an interesting possibility of
coupling these... | 1994-03-18 | 2008-02-03 | [
"comp-gas",
"nlin.CG"
] | Jeffrey Yepez (US Air Force, Phillips Laboratory) |
comp-gas/9403003 | Correlations and Renormalization in Lattice Gases | A complete formulation is given of an exact kinetic theory for lattice gases.
This kinetic theory makes possible the calculation of corrections to the usual
Boltzmann / Chapman-Enskog analysis of lattice gases due to the buildup of
correlations. It is shown that renormalized transport coefficients can be
calculated per... | 1994-03-11 | 2016-08-31 | [
"comp-gas",
"adap-org",
"chao-dyn",
"cond-mat",
"hep-th",
"nlin.AO",
"nlin.CD",
"nlin.CG",
"nlin.PS",
"patt-sol"
] | Bruce M. Boghosian (Thinking Machines Corp.) and Washington Taylor
(MIT) |
comp-gas/9403002 | Estimating Functions of Distributions from A Finite Set of Samples, Part
2: Bayes Estimators for Mutual Information, Chi-Squared, Covariance and other
Statistics | We present estimators for entropy and other functions of a discrete
probability distribution when the data is a finite sample drawn from that
probability distribution. In particular, for the case when the probability
distribution is a joint distribution, we present finite sample estimators for
the mutual information, c... | 1994-03-08 | 2008-02-03 | [
"comp-gas",
"adap-org",
"nlin.AO",
"nlin.CG"
] | David R. Wolf, David H. Wolpert |
comp-gas/9403001 | Estimating Functions of Probability Distributions from a Finite Set of
Samples, Part 1: Bayes Estimators and the Shannon Entropy | We present estimators for entropy and other functions of a discrete
probability distribution when the data is a finite sample drawn from that
probability distribution. In particular, for the case when the probability
distribution is a joint distribution, we present finite sample estimators for
the mutual information, c... | 1994-03-08 | 2008-02-03 | [
"comp-gas",
"adap-org",
"nlin.AO",
"nlin.CG"
] | David H. Wolpert, David R. Wolf |
comp-gas/9401002 | Lattice Boltzmann Magnetohydrodynamics | Lattice gas and lattice Boltzmann methods are recently developed numerical
schemes for simulating a variety of physical systems. In this paper a new
lattice Boltzmann model for modeling two-dimensional incompressible
magnetohydrodynamics (MHD) is presented. The current model fully utilizes the
flexibility of the lattic... | 1994-01-28 | 2009-10-22 | [
"comp-gas",
"nlin.CG"
] | Daniel Martinez, Shiyi Chen (Theoretical Division and Center for
Nonlinear Studies, Los Alamos National Laboratory) and William Matthaeus
(Bartol Research Institute, University of Delaware, Newark, DE) |
comp-gas/9401004 | A Lattice Boltzmann Subgrid Model for High Reynolds Number Flows | A subgrid turbulence model for the lattice Boltzmann method is proposed for
high Reynolds number fluid flow applications. The method, based on the standard
Smagorinsky subgrid model and a single-time relaxation lattice Boltzmann
method, incorporates the advantages of the lattice Boltzmann method for
handling arbitrary ... | 1994-01-28 | 2008-02-03 | [
"comp-gas",
"nlin.CG"
] | S. Hou, J. Sterling, S. Chen and G. D. Doolen (Theoretical Division
and Center for Nonlinear Studies Los Alamos National Laboratory, Los Alamos,
NM) |
comp-gas/9401003 | Simulation of Cavity Flow by the Lattice Boltzmann Method | A detailed analysis is presented to demonstrate the capabilities of the
lattice Boltzmann method. Thorough comparisons with other numerical solutions
for the two-dimensional, driven cavity flow show that the lattice Boltzmann
method gives accurate results over a wide range of Reynolds numbers. Studies of
errors and con... | 1994-01-28 | 2009-10-22 | [
"comp-gas",
"nlin.CG"
] | Shuling Hou, Qisu Zou, Shiyi Chen, Gary D. Doolen and Allen C. Cogley
(Center for Nonlinear Studies and Theoretical Division Los Alamos National
Laboratory, Los Alamos, NM) |
comp-gas/9401001 | Simulation of non-ideal gases and liquid-gas phase transitions by
lattice Boltzmann equation | We describe in detail a recently proposed lattice-Boltzmann model for
simulating flows with multiple phases and components. In particular, the focus
is on the modeling of one-component fluid systems which obey non-ideal gas
equations of state and can undergo a liquid-gas type phase transition. The
model is shown to be ... | 1994-01-26 | 2009-10-22 | [
"comp-gas",
"nlin.CG"
] | Xiaowen Shan (CNLS, LANL) and Hudong Chen (Dartmouth College) |
cond-mat/9412123 | Structures and Stabilities of H3+(H2)n Clusters (n=1-11) | Geometries and energies for H3+(H2)n clusters (n = 0, ..., 11) have been
calculated using standard "ab initio" methods. Up to clusters with n = 6, four
different Pople basis sets (DZ, TZ, TZP) have been used in the calculations.
For larger cluster sizes, the calculations have been carried out with one basis
set (DZ) us... | 1994-12-31 | 2007-05-23 | [
"cond-mat"
] | B. Diekmann, P. Borrmann, E.R. Hilf |
cond-mat/9412122 | Third Cumulant of the total Transmission of diffuse Waves | The probability distribution of the total transmission is studied for waves
multiple scattered from a random, static configuration of scatterers. A
theoretical study of the second and third cumulant of this distribution is
presented. Within a diagrammatic approach a theory is developed which relates
the third cumulant ... | 1994-12-30 | 2009-10-22 | [
"cond-mat"
] | M. C. W. van Rossum, Johannes F. de Boer, and Th. M. Nieuwenhuizen |
cond-mat/9412121 | Magnetism of small transition metal clusters and the effects of
isomerisation | We investigate the magnetic properties of small transition metal clusters
using a simple statistical model, which requires some input data from ab initio
spin-density functional calculations. In our study we consider a
thermodynamically equilibrated ensemble of clusters with different structures,
spin multiplicities, a... | 1994-12-30 | 2007-05-23 | [
"cond-mat"
] | Peter Borrmann, Bernd Diekmann, Eberhard R. Hilf, David Tomanek |
cond-mat/9412120 | Magnetization switching in nanoscale ferromagnetic grains: description
by a kinetic Ising model | The magnetic relaxation of ferromagnetic powders has been studied for many
years, largely due to its importance to recording technologies. However, only
recently have experiments been performed that resolve the magnetic state of
individual sub-micron particles. Motivated by these experimental developments,
we use dropl... | 1994-12-29 | 2009-10-22 | [
"cond-mat",
"adap-org",
"mtrl-th",
"nlin.AO"
] | Howard L. Richards, Scott W. Sides, M. A. Novotny, and Per Arne
Rikvold |
cond-mat/9412119 | Polymer Braids and Iterated Moire Maps | Crystalline order in dense packings of long polymers with a definite
handedness is difficult to reconcile with the tendency of these chiral objects
to twist and braid about each other. If the chirality is weak, the state of
lowest energy is a triangular lattice of rigid rods. When the chirality is
strong, however, scre... | 1994-12-29 | 2008-02-03 | [
"cond-mat"
] | David R. Nelson and Randall D. Kamien |
cond-mat/9412118 | Anderson-Yuval approach to the multichannel Kondo problem | We analyze the structure of the perturbation expansion of the general
multichannel Kondo model with channel anisotropic exchange couplings and in the
presence of an external magnetic field, generalizing to this case the
Anderson-Yuval technique. For two channels, we are able to map the Kondo model
onto a generalized re... | 1994-12-28 | 2009-10-22 | [
"cond-mat"
] | M. Fabrizio, Alexander O. Gogolin, and Ph. Nozi\`eres |
cond-mat/9412115 | 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... | 1994-12-28 | 2009-10-22 | [
"cond-mat",
"chao-dyn",
"comp-gas",
"nlin.CD",
"nlin.CG"
] | L. Biferale, A. Crisanti, M. Vergassola, A. Vulpiani |
cond-mat/9412116 | Charge Dynamics in the Planar t-J Model | The finite-temperature optical conductivity $\sigma(\omega)$ in the planar
$t-J$ model is analysed using recently introduced numerical method based on the
Lanczos diagonalization of small systems (up to 20 sites), as well as by
analytical approaches, including the method of frequency moments and the
retraceable-path ap... | 1994-12-28 | 2009-10-22 | [
"cond-mat"
] | J. Jaklic and P. Prelovsek (J. Stefan Institute) |
cond-mat/9412117 | Path Integral Density Functional Theory | A new method ( PI-DFT ) which combines path integrals and density functional
theory is proposed as a pathway to many fields of physics. Within path integral
theory it is possible to construct particle densities without explicitly
calculating individual wave functions. These densities can directly be used as
an input to... | 1994-12-28 | 2007-05-23 | [
"cond-mat"
] | Peter Borrmann ( University of Oldenburg, FRG) |
cond-mat/9412113 | New enhancements to Feynmans Path Integral for fermions | We show that the computational effort for the numerical solution of fermionic
quantum systems, occurring e.g., in quantum chemistry, solid state physics,
field theory in principle grows with less than the square of the particle
number for problems stated in one space dimension and with less than the cube
of the particl... | 1994-12-27 | 2007-05-23 | [
"cond-mat"
] | Peter Borrmann and Eberhard R. Hilf (Physics Dept, Univ of Oldenburg) |
cond-mat/9412114 | Hard-core Final State Interaction Effects in Deep Inelastic Scattering | Hard-core final state interaction effects in the response function are
investigated in the asymptotic limit of momentum transfer q->Infinity. A new
treatment of the response is presented, which displays the relevant scattering
contribution. A modification of the otherwise expected free response is
obtained for Fermi an... | 1994-12-27 | 2009-10-22 | [
"cond-mat",
"nucl-th"
] | Jaime Besprosvany and S. A. Gurvitz (Weizmann Institute) |
cond-mat/9412111 | A Model for Solid $^3$He: II | We propose a simple Ginzburg-Landau free energy to describe the magnetic
phase transition in solid $^3$He. The free energy is analyzed with due
consideration of the hard first order transitions at low magnetic fields. The
resulting phase diagram contains all of the important features of the
experimentally observed ph a... | 1994-12-26 | 2009-10-22 | [
"cond-mat"
] | J. Dubois and P. Kumar |
cond-mat/9412110 | Interactions of Collective Excitations with Vortices in Superfluid
Systems | We investigate the interactions of collective excitations with vortices in
superfluid systems, including $~^4$He and superconductors. The dynamical
equations are obtained by the aid of the many-body wavefunction and the
density-density correlation function. The scattering cross-section of
collective excitations with a ... | 1994-12-26 | 2009-10-22 | [
"cond-mat"
] | E. Demircan, P. Ao, Q. Niu |
cond-mat/9412112 | Effects of Next-Nearest-Neighbor Hopping on the Hole Motion in an
Antiferromagnetic Background | In this paper we study the effect of next-nearest-neighbor hopping on the
dynamics of a single hole in an antiferromagnetic (N\'{e}el) background. In the
framework of large dimensions the Green function of a hole can be obtained
exactly. The exact density of states of a hole is thus calculated in large
dimensions and o... | 1994-12-26 | 2009-10-22 | [
"cond-mat"
] | Avraham Schiller, Pradeep Kumar, Rainer Strack and Dieter Vollhardt |
cond-mat/9412109 | Metal-Insulator transition in the Generalized Hubbard model | We present the exact ground-state wave function and energy of the generalized
Hubbard model, subjected to the condition that the number of double occupied
sites is conserved, for a wide, physically relevant range of parameters. For
one hole and one double occupied site the existence of the ferromagnetic
ground-state is... | 1994-12-25 | 2009-10-22 | [
"cond-mat"
] | Anatoly A.Ovchinnikov |
cond-mat/9412108 | "Level Curvature" Distribution for Diffusive Aharonov-Bohm Systems:
analytical results | We calculate analytically the distributions of "level curvatures" (LC) (the
second derivatives of eigenvalues with respect to a magnetic flux) for a
particle moving in a white-noise random potential.
We find that the Zakrzewski-Delande conjecture is still valid even if the
lowest weak localization corrections are tak... | 1994-12-24 | 2009-10-22 | [
"cond-mat",
"chao-dyn",
"nlin.CD"
] | Yan V. Fyodorov and H-J. Sommers |
cond-mat/9412107 | Quasiparticle dispersion of the t-J and Hubbard models | The spectral weight ${\rm A({\bf p},\omega)}$ of the two dimensional ${\rm
t-J}$ and Hubbard models has been calculated using exact diagonalization and
quantum Monte Carlo techniques, at several densities ${\rm 1.0 \leq \langle n
\rangle \leq 0.5}$. The photoemission $(\omega < 0)$ region contains two
dominant distinct... | 1994-12-23 | 2009-10-22 | [
"cond-mat"
] | A. Moreo, S. Haas, A. Sandvik, and E. Dagotto |
cond-mat/9412104 | Magnetic impurities coupled to quantum antiferromagnets in one dimension | Magnetic impurities coupled antiferromagnetically to a one-dimensional
Heisenberg model are studied by numerical diagonalization of chains of finite
clusters. By calculating the binding energy and the correlation function, it is
shown that a local singlet develops around each impurity. This holds true for
systems with ... | 1994-12-23 | 2009-10-22 | [
"cond-mat"
] | J. Igarashi, T. Tonegawa (Kobe Univ.), M. Kaburagi, P. Fulde |
cond-mat/9412106 | Replica Symmetry Breaking in the Critical Behaviour of the Random
Ferromagnet | We study the critical properties of the weakly disordered $p$-component
random Heisenberg ferromagnet. It is shown that if the specific heat critical
exponent of the pure system is positive, the traditional renormalization group
(RG) flows at dimensions $D=4-\e$, which are usually considered as describing
the disorder-... | 1994-12-23 | 2009-10-22 | [
"cond-mat"
] | Viktor Dotsenko, A. B. Harris, David Sherrington and R. B. Stinchcombe |
cond-mat/9412105 | Equations of State for Nonlinear Sigma-Models II: Relations between
Resummation Schemes, and Crossover Phenomena | It is shown how a recent method to systematically extrapolate and resum the
loop expansion for nonlinear sigma-models is related to solutions of the
renormalization group equation. This relation is used to generalize the
explicit equations of state obtained previously to models which display
crossover phenomena. As an ... | 1994-12-23 | 2009-10-22 | [
"cond-mat"
] | S.Q. Yang and D. Belitz |
cond-mat/9412103 | "Scaling of an anomalous metal/insulator transition in a 2D system in
silicon at zero magnetic field" | We have studied the temperature dependence of resistivity, $\rho$, for a
two-dimensional electron system in silicon at low electron densities,
$n_s\sim10^{11}$ cm$^{-2}$, near the metal/insulator transition. The
resistivity was empirically found to scale with a single parameter, $T_0$,
which approaches zero at some cri... | 1994-12-22 | 2007-05-23 | [
"cond-mat"
] | S.V.Kravchenko, Whitney E.Mason, G.E.Bowker, J.E.Furneaux,
V.M.Pudalov, and M. D'Iorio |
cond-mat/9412095 | Structural and dynamical properties of superfluid helium: a density
functional approach | We present a novel density functional for liquid 4He, properly accounting for
the static response function and the phonon-roton dispersion in the uniform
liquid. The functional is used to study both structural and dynamical
properties of superfluid helium in various geometries. The equilibrium
properties of the free su... | 1994-12-21 | 2009-10-22 | [
"cond-mat"
] | F.Dalfovo, A.Lastri, L.Pricaupenko, S.Stringari, and J.Treiner |
cond-mat/9412098 | Phases of two coupled Luttinger liquids | A model of two interacting one--dimensional fermion systems (``Luttinger
liquids'') coupled by single--particle hopping is investigated. Bosonization
allows a number of exact statements to be made. In particular, for forward
scattering only, the model contains two massless boson sectors and an Ising
type critical secto... | 1994-12-21 | 2009-10-22 | [
"cond-mat"
] | H. J. Schulz |
cond-mat/9412099 | Ballistic annihilation kinetics for a multi-velocity one-dimensional
ideal gas | Ballistic annihilation kinetics for a multi-velocity one-dimensional ideal
gas is studied in the framework of an exact analytic approach. For an initial
symmetric three-velocity distribution, the problem can be solved exactly and it
is shown that different regimes exist depending on the initial fraction of
particles at... | 1994-12-21 | 2009-10-22 | [
"cond-mat"
] | Michel Droz, Pierre-Antoine Rey, Laurent Frachebourg and Jaros{\l}aw
Piasecki |
cond-mat/9412102 | Effect of spin degeneracy on scaling in the quantum Hall regime | We study the delocalization transition for spin-polarized and spin-degenerate
non-interacting electrons in the lowest Landau level. We perform finite-size
scaling calculations of the Thouless number, for varying amounts of potential
and spin-orbit scattering. {}For spin-polarized electrons, we obtain a
one-parameter sc... | 1994-12-21 | 2007-05-23 | [
"cond-mat"
] | C.~B.~Hanna, D.~P.~Arovas, K.~Mullen, and S.~M.~Girvin |
cond-mat/9412101 | Theory of Shubnikov--De Haas Oscillations Around the $\nu=1/2$ Filling
Factor of the Landau Level: Effect of Gauge Field Fluctuations | We present a theory of magnetooscillations around the $\nu =1/2$ Landau level
filling factor based on a model with a fluctuating Chern--Simons field. The
quasiclassical treatment of the problem is appropriate and leads to an
unconventional $\exp\left[-(\pi/\omega_c\tau^*_{1/2})^4\right]$ behavior of the
amplitude of os... | 1994-12-21 | 2009-10-22 | [
"cond-mat"
] | A.G. Aronov, E. Altshuler, A.D. Mirlin and P. Woelfle |
cond-mat/9412096 | Aharonov-Bohm Oscillations in a One-Dimensional Wigner Crystal-Ring | We calculate the magnetic moment (`persistent current') in a strongly
correlated electron system --- a Wigner crystal --- in a one-dimensional
ballistic ring. The flux and temperature dependence of the persistent current
in a perfect ring is shown to be essentially the same as for a system of
non-interacting electrons.... | 1994-12-21 | 2009-10-22 | [
"cond-mat"
] | I. V. Krive, R. I. Shekhter, S. M. Girvin, and M. Jonson |
cond-mat/9412100 | Center of mass and relative motion in time dependent density functional
theory | It is shown that the exchange-correlation part of the action functional
$A_{xc}[\rho (\vec r,t)]$ in time-dependent density functional theory , where
$\rho (\vec r,t)$ is the time-dependent density, is invariant under the
transformation to an accelerated frame of reference $\rho (\vec r,t) \to \rho '
(\vec r,t) = \rho ... | 1994-12-21 | 2009-10-22 | [
"cond-mat"
] | G. Vignale (ITP, Santa Barbara and Missouri University) |
cond-mat/9412097 | Maximum Overheating and Partial Wetting of Nonmelting Solid Surfaces | Surfaces which do not exhibit surface melting below the melting point
(nonmelting surfaces) have been recently observed to sustain a very large
amount of overheating. We present a theory which identifies a maximum
overheating temperature, and relates it to other thermodynamical properties of
the surface, in particular ... | 1994-12-21 | 2009-10-22 | [
"cond-mat"
] | Francesco D. Di Tolla, Furio Ercolessi, and Erio Tosatti
(International School for Advanced Studies, SISSA-ISAS) |
cond-mat/9412094 | Impurities in $s=1$ Heisenberg Antiferromagnets | The $s=1$ Heisenberg Antiferromagnet is studied in the presence of two kinds
of local impurities. First, a perturbed antiferromagnetic bond with $J'\ne J$
at the center of an even-length open chain is considered. Using the density
matrix renormalization group method we find that, for sufficiently strong or
weak $J'$, a... | 1994-12-20 | 2009-10-22 | [
"cond-mat"
] | Erik Sorensen (IU, Bloomington) and Ian Affleck (UBC) |
cond-mat/9412091 | Piezoelectricity of Cholesteric Elastomers | We consider theoretically the properties of piezoelectricity in cholesteric
elastomers. We deduce using symmetry considerations the piezoelectric
contributions to the free energy in the context of a coarse-grained description
of the material. In contrast to previous work we find that compressions or
elongations of the ... | 1994-12-20 | 2009-10-22 | [
"cond-mat"
] | Robert A. Pelcovits (Brandeis University and Brown University) and
Robert B. Meyer (Brandeis University) |
cond-mat/9412090 | Statistics of radiation in a disordered medium: from ballistic to
diffusive regime | The distribution function for the intensity of radiation propagating in a
random medium is analyzed for arbitrary multiplicity of scattering (for
arbitrary relation between the distance of propagation and mean free path),
including as limiting cases purely ballistic and purely diffusive regimes. The
calculation is fulf... | 1994-12-20 | 2007-05-23 | [
"cond-mat"
] | Eugene Kogan and Moshe Kaveh (Jack and Pearl Resnick Institute of
Advanced Technology, Department of Physics, Bar-Ilan University) |
cond-mat/9412087 | Effective lattice actions for correlated electrons | We present an exact, unconstrained representation of the electron operators
in terms of operators of opposite statistics. We propose a path--integral
representation for the $t$-$J$ model and introduce a parameter controlling the
semiclassical behaviour. We extend the functional approach to the Hubbard model
and show th... | 1994-12-20 | 2009-10-22 | [
"cond-mat"
] | Antimo Angelucci |
cond-mat/9412088 | Universality of Random-Matrix Results for non-Gaussian Ensembles | We study random-matrix ensembles with a non-Gaussian probability distribution
$P(H) \sim \exp (-N {\rm tr }\, V(H))$ where $N$ is the dimension of the matrix
$H$ and $V(H)$ is independent of $N$. Using Efetov's supersymmetry formalism,
we show that in the limit $N \rightarrow \infty$ both energy level correlation
funct... | 1994-12-20 | 2009-10-22 | [
"cond-mat"
] | G. Hackenbroich and H.A. Weidenmueller |
cond-mat/9412089 | Quasiparticle Dispersion of the 2D Hubbard Model: From an Insulator to a
Metal | On the basis of Quantum-Monte-Carlo results the evolution of the spectral
weight $A(\vec k, \omega)$ of the two-dimensional Hubbard model is studied from
insulating to metallic behavior. As observed in recent photoemission
experiments for cuprates, the electronic excitations display essentially
doping-independent featu... | 1994-12-20 | 2009-10-22 | [
"cond-mat"
] | R. Preuss, W. von der Linden and W. Hanke |
cond-mat/9412086 | Persistent Currents in Multichannel Interacting Systems | Persistent currents of disordered multichannel mesoscopic rings of spinless
interacting fermions threaded by a magnetic flux are calculated using exact
diagonalizations and self-consistent Hartree-Fock methods. The validity of the
Hartree-Fock approximation is controled by a direct comparison with the exact
results on ... | 1994-12-20 | 2009-10-22 | [
"cond-mat"
] | Georges BOUZERAR and Didier POILBLANC (Laboratoire de Physique
Quantique, Universite Paul Sabatier, Toulouse) |
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