1,414 research outputs found
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 captures the {\em Propose-Evaluate-Modify} cycle of
collaboration, and by allowing the system to initiate subdialogues to negotiate
proposed additions to the shared plan and to provide support for its claims. In
addition, our system handles in a unified manner the negotiation of proposed
domain actions, proposed problem-solving actions, and beliefs proposed by
discourse actions. Furthermore, it captures cooperative responses within the
collaborative framework and accounts for why questions are sometimes never
answered.Comment: 8 pages, to appear in the Proceedings of AAAI-94. LaTeX source file,
requires aaai.sty and epsf.tex. Figures included in separate file
Generic dialogue modeling for multi-application dialogue systems
We present a novel approach to developing interfaces for multi-application dialogue systems. The targeted interfaces allow transparent switching between a large number of applications within one system. The approach, based on the Rapid Dialogue Prototyping Methodology (RDPM) and the Vector Space model techniques from Information Retrieval, is composed of three main steps: (1) producing finalized dia
logue models for applications using the RDPM, (2) designing an application interaction hierarchy, and (3) navigating between the applications based on the user's application of interest
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IBMâs PIQUANT II in TREC2004
PIQUANT II, the system we used for TREC 2004, is a completely reengineered system whose core functionalities for answering factoid and list questions remain largely unchanged from previous. We continue to address these questions using our multi-strategy and multi-source approach
Modification of Perioral Stiffness in Patients With Repaired Cleft Lip and Palate
ObjectiveâTo measure and compare the perioral stiffness among three groups of pediatric subjects: a group of patients with a repaired cleft lip (and palate) who had a secondary lip revision surgery (revision), another group of patients with repaired cleft lip (and palate) who did not have secondary surgery (nonrevision), and a group of noncleft ânormalâ patients (noncleft).
DesignâA parallel, three-group, nonrandomized clinical trial.
ParticipantsâA total of 16 patients with repaired cleft lip/palate who did not have lip revision, 13 patients with repaired cleft lip/palate who had lip revision surgery and were tested at 18 to 24 months postsurgery, and 27 noncleft patients.
AnalysisâNonparticipatory perioral stiffness was sampled using a recently developed facereferenced measurement technology known as OroSTIFF. Perioral stiffness, derived as a quotient from resultant force and interangle lip span, was modeled with multilevel regression techniques. Real-time calculation of the perioral stiffness function demonstrated a significant quadratic relation between imposed interangle stretch and resultant force for each of the three groups.
ResultsâThis nonlinear stiffness growth function was significantly elevated in the nonrevision patients compared with the noncleft controls and is likely due to the presence of scar tissue in the upper lip; it was significantly lower among patients with cleft lip/palate who completed lip revision surgery.
ConclusionâThis study demonstrates the efficacy of applying an objective measurement to map differences in perioral tissue biomechanics among patients born with orofacial clefts
Modification of Perioral Stiffness in Patients With Repaired Cleft Lip and Palate
ObjectiveâTo measure and compare the perioral stiffness among three groups of pediatric subjects: a group of patients with a repaired cleft lip (and palate) who had a secondary lip revision surgery (revision), another group of patients with repaired cleft lip (and palate) who did not have secondary surgery (nonrevision), and a group of noncleft ânormalâ patients (noncleft).
DesignâA parallel, three-group, nonrandomized clinical trial.
ParticipantsâA total of 16 patients with repaired cleft lip/palate who did not have lip revision, 13 patients with repaired cleft lip/palate who had lip revision surgery and were tested at 18 to 24 months postsurgery, and 27 noncleft patients.
AnalysisâNonparticipatory perioral stiffness was sampled using a recently developed facereferenced measurement technology known as OroSTIFF. Perioral stiffness, derived as a quotient from resultant force and interangle lip span, was modeled with multilevel regression techniques. Real-time calculation of the perioral stiffness function demonstrated a significant quadratic relation between imposed interangle stretch and resultant force for each of the three groups.
ResultsâThis nonlinear stiffness growth function was significantly elevated in the nonrevision patients compared with the noncleft controls and is likely due to the presence of scar tissue in the upper lip; it was significantly lower among patients with cleft lip/palate who completed lip revision surgery.
ConclusionâThis study demonstrates the efficacy of applying an objective measurement to map differences in perioral tissue biomechanics among patients born with orofacial clefts
Non-Commutative Gauge Theories and the Cosmological Constant
We discuss the issue of the cosmological constant in non-commutative
non-supersymmetric gauge theories. In particular, in orbifold field theories
non-commutativity acts as a UV cut-off. We suggest that in these theories
quantum corrections give rise to a vacuum energy \rho, that is controlled by
the non-commutativity parameter \theta, \rho ~ 1/theta^2 (only a soft
logarithmic dependence on the Planck scale survives). We demonstrate our claim
in a two-loop computation in field theory and by certain higher loop examples.
Based on general expressions from string theory, we suggest that the vacuum
energy is controlled by non-commutativity to all orders in perturbation theory.Comment: 11 pages, RevTex. 4 eps figures. v2: Typos corrected. To appear in
Phys.Rev.
Nonequilibrium Dynamics in Noncommutative Spacetime
We study the effects of spacetime noncommutativity on the nonequilibrium
dynamics of particles in a thermal bath. We show that the noncommutative
thermal bath does not suffer from any further IR/UV mixing problem in the sense
that all the finite-temperature non-planar quantities are free from infrared
singularities. We also point out that the combined effect of finite temperature
and noncommutative geometry has a distinct effect on the nonequilibrium
dynamics of particles propagating in a thermal bath: depending on the momentum
of the mode of concern, noncommutative geometry may switch on or switch off
their decay and thermalization. This momentum dependent alternation of the
decay and thermalization rates could have significant impacts on the
nonequilibrium phenomena in the early universe at which spacetime
noncommutativity may be present. Our results suggest a re-examination of some
of the important processes in the early universe such as reheating after
inflation, baryogenesis and the freeze-out of superheavy dark matter
candidates.Comment: 24 pages, 2 figure
Deformed "Commutative" Chern - Simons System
Noncommutative Chern - Simons' system is non-perturbatively investigated at a
full deformed level. A deformed "commutative" phase space is found by a
non-canonical change between two sets of deformed variables of noncommutative
space. It is explored that in the "commutative" phase space all calculations
are similar to the case in commutative space. Spectra of the energy and angular
momentum of the Chern - Simons' system are obtained at the full deformed level.
The noncommutative-commutative correspondence is clearly showed. Formalism for
the general dynamical system is briefly presented. Some subtle points are
clarified.Comment: 15 page
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