1,064,832 research outputs found
A generic tool to generate a lexicon for NLP from Lexicon-Grammar tables
Lexicon-Grammar tables constitute a large-coverage syntactic lexicon but they
cannot be directly used in Natural Language Processing (NLP) applications
because they sometimes rely on implicit information. In this paper, we
introduce LGExtract, a generic tool for generating a syntactic lexicon for NLP
from the Lexicon-Grammar tables. It is based on a global table that contains
undefined information and on a unique extraction script including all
operations to be performed for all tables. We also present an experiment that
has been conducted to generate a new lexicon of French verbs and predicative
nouns
A Twisting Electrovac Solution of Type II with the Cosmological Constant
An exact solution of the current-free Einstein-Maxwell equations with the
cosmological constant is presented. It is of Petrov type II, and its double
principal null vector is geodesic, shear-free, expanding, and twisting. The
solution contains five constants. Its electromagnetic field is non-null and
aligned. The solution admits only one Killing vector and includes, as special
cases, several known solutions.Comment: 4 pages, LaTeX 2e, no figures. The present (second) version,
identical to that published in General Relativity and Gravitation, is derived
from the first version by presenting the admitted Killing vector, and by
adding the last paragraph, two footnotes (here Footnotes 1 and 3), and two
references (here Refs. [3,4]
A Constant Haunting
A three movement work for wind ensemble and soprano soloist
Universality and constant scalar curvature invariants
A classical solution is called universal if the quantum correction is a
multiple of the metric. Universal solutions consequently play an important role
in the quantum theory. We show that in a spacetime which is universal all of
the scalar curvature invariants are constant (i.e., the spacetime is CSI)
On the Numerical Study of the Complexity and Fractal Dimension of CMB Anisotropies
We consider the problem of numerical computation of the Kolmogorov complexity
and the fractal dimension of the anisotropy spots of Cosmic Microwave
Background (CMB) radiation. Namely, we describe an algorithm of estimation of
the complexity of spots given by certain pixel configuration on a grid and
represent the results of computations for a series of structures of different
complexity. Thus, we demonstrate the calculability of such an abstract
descriptor as the Kolmogorov complexity for CMB digitized maps. The correlation
of complexity of the anisotropy spots with their fractal dimension is revealed
as well. This technique can be especially important while analyzing the data of
the forthcoming space experiments.Comment: LATEX, 3 figure
constant-roll inflation
The previously introduced class of two-parametric phenomenological
inflationary models in General Relativity in which the slow-roll assumption is
replaced by the more general, constant-roll condition is generalized to the
case of gravity. A simple constant-roll condition is defined in the
original Jordan frame, and exact expressions for a scalaron potential in the
Einstein frame, for a function (in the parametric form) and for
inflationary dynamics are obtained. The region of the model parameters
permitted by the latest observational constraints on the scalar spectral index
and the tensor-to-scalar ratio of primordial metric perturbations generated
during inflation is determined.Comment: 8 pages, 3 figures; added Fig. 2 and Appendix, matches published
versio
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