22,582 research outputs found
Lexical alignment in triadic communication
Foltz A, Gaspers J, Thiele K, Stenneken P, Cimiano P. Lexical alignment in triadic communication. Frontiers in Psychology. 2015;6: 127
Mass estimates for visual binaries with incomplete orbits
The problem of estimating the total mass of a visual binary when its orbit is
incomplete is treated with Bayesian methods. The posterior mean of a mass
estimator is approximated by a triple integral over orbital period, time of
periastron and orbital eccentricity. This reduction to 3-D from the 7-D space
defined by the conventional Campbell parameters is achieved by adopting the
Thiele-Innes elements and exploiting the linearity with respect to the four
Thiele-Innes constants. The formalism is tested on synthetic observational data
covering a variable fraction of a model binary's orbit. The posterior mean of
the mass estimator is numerically found to be unbiased when the data cover >
40% of the orbit.Comment: 12 pages, 13 figures. Revised version accepted by Astronomy and
Astrophysic
Frequentist confidence intervals for orbits
The problem of efficiently computing the orbital elements of a visual binary
while still deriving confidence intervals with frequentist properties is
treated. When formulated in terms of the Thiele-Innes elements, the known
distribution of probability in Thiele-Innes space allows efficient grid-search
plus Monte-Carlo-sampling schemes to be constructed for both the
minimum- and Bayesian approaches to parameter estimation. Numerical
experiments with independent realizations of an observed orbit confirm
that the and confidence and credibility intervals have coverage
fractions close to their frequentist values. \keywords{binaries: visual -
stars: fundamental parameters - methods:statistical}Comment: 7 pages, 2 figures. Minor changes. Accepted by Astronomy and
Astrophysic
A pointwise cubic average for two commuting transformations
Huang, Shao and Ye recently studied pointwise multiple averages by using
suitable topological models. Using a notion of dynamical cubes introduced by
the authors, the Huang-Shao-Ye technique and the Host machinery of magic
systems, we prove that for a system with commuting
transformations and , the average converges a.e. as goes to infinity for
any
Role of the heat shock transcription factor, Hsf1, in a major fungal pathogen that is obligately associated with warm-blooded animals
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