14,347 research outputs found
Extracting Noun Phrases from Large-Scale Texts: A Hybrid Approach and Its Automatic Evaluation
To acquire noun phrases from running texts is useful for many applications,
such as word grouping,terminology indexing, etc. The reported literatures adopt
pure probabilistic approach, or pure rule-based noun phrases grammar to tackle
this problem. In this paper, we apply a probabilistic chunker to deciding the
implicit boundaries of constituents and utilize the linguistic knowledge to
extract the noun phrases by a finite state mechanism. The test texts are
SUSANNE Corpus and the results are evaluated by comparing the parse field of
SUSANNE Corpus automatically. The results of this preliminary experiment are
encouraging.Comment: 8 pages, Postscript file, Unix compressed, uuencode
The role of computer use and English proficiency in gender wage inequality: Taiwanese evidence
This paper uses the Blinder-Oaxaca decomposition and accounts for potential identification bias in order to shed light on the role of computer use as well as English ability on the gender wage differential in Taiwan. The results show that both computer use and English proficiency benefit female wage earners and contribute to an equalization of the gender wage gap.Computer Use
GRB beaming and gravitational-wave observations
Using the observed rate of short-duration gamma-ray bursts (GRBs) it is
possible to make predictions for the detectable rate of compact binary
coalescences in gravitational-wave detectors. These estimates rely crucially on
the growing consensus that short gamma-ray bursts are associated with the
merger of two neutron stars or a neutron star and a black hole, but otherwise
make no assumptions beyond the observed rate of short GRBs. In particular, our
results do not assume coincident gravitational wave and electromagnetic
observations. We show that the non-detection of mergers in the existing
LIGO/Virgo data constrains the progenitor masses and beaming angles of
gamma-ray bursts. For future detectors, we find that the first detection of a
NS-NS binary coalescence associated with the progenitors of short GRBs is
likely to happen within the first 16 months of observation, even in the case of
a modest network of observatories (e.g., only LIGO-Hanford and LIGO-Livingston)
operating at modest sensitivities (e.g., advanced LIGO design sensitivity, but
without signal recycling mirrors), and assuming a conservative distribution of
beaming angles (e.g. all GRBs beamed at \theta=30 deg). Less conservative
assumptions reduce the waiting time until first detection to weeks to months.
Alternatively, the compact binary coalescence model of short GRBs can be ruled
out if a binary is not seen within the first two years of operation of a
LIGO-Hanford, LIGO-Livingston, and Virgo network at advanced design
sensitivity. We also demonstrate that the rate of GRB triggered sources is less
than the rate of untriggered events if \theta<30 deg, independent of the noise
curve, network configuration, and observed GRB rate. Thus the first detection
in GWs of a binary GRB progenitor is unlikely to be associated with a GRB
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