15,590 research outputs found
Computer-intensive rate estimation, diverging statistics and scanning
A general rate estimation method is proposed that is based on studying the
in-sample evolution of appropriately chosen diverging/converging statistics.
The proposed rate estimators are based on simple least squares arguments, and
are shown to be accurate in a very general setting without requiring the choice
of a tuning parameter. The notion of scanning is introduced with the purpose of
extracting useful subsamples of the data series; the proposed rate estimation
method is applied to different scans, and the resulting estimators are then
combined to improve accuracy. Applications to heavy tail index estimation as
well as to the problem of estimating the long memory parameter are discussed; a
small simulation study complements our theoretical results.Comment: Published in at http://dx.doi.org/10.1214/009053607000000064 the
Annals of Statistics (http://www.imstat.org/aos/) by the Institute of
Mathematical Statistics (http://www.imstat.org
Stable marked point processes
In many contexts such as queuing theory, spatial statistics, geostatistics
and meteorology, data are observed at irregular spatial positions. One model of
this situation involves considering the observation points as generated by a
Poisson process. Under this assumption, we study the limit behavior of the
partial sums of the marked point process , where X(t) is a
stationary random field and the points t_i are generated from an independent
Poisson random measure on . We define the sample
mean and sample variance statistics and determine their joint asymptotic
behavior in a heavy-tailed setting, thus extending some finite variance results
of Karr [Adv. in Appl. Probab. 18 (1986) 406--422]. New results on subsampling
in the context of a marked point process are also presented, with the
application of forming a confidence interval for the unknown mean under an
unknown degree of heavy tails.Comment: Published at http://dx.doi.org/10.1214/009053606000001163 in the
Annals of Statistics (http://www.imstat.org/aos/) by the Institute of
Mathematical Statistics (http://www.imstat.org
A bitter sweet asynchrony: the relation between eating attitudes, dietary restraint on smell and taste function
Incorporating regime metrics into latent variable dynamic models to detect early-warning signals of functional changes in fisheries ecology
Little Higgs Review
Recently there has been renewed interest in the possibility that the Higgs
particle of the Standard Model is a pseudo-Nambu-Goldstone boson. This
development was spurred by the observation that if certain global symmetries
are broken only by the interplay between two or more coupling constants, then
the Higgs mass-squared is free from quadratic divergences at one loop. This
"collective symmetry" breaking is the essential ingredient in little Higgs
theories, which are weakly coupled extensions of the Standard Model with little
or no fine tuning, describing physics up to an energy scale ~10 TeV. Here we
give a pedagogical introduction to little Higgs theories. We review their
structure and phenomenology, focusing mainly on the SU(3) theory, the Minimal
Moose, and the Littlest Higgs as concrete examples.Comment: To appear in Annual Review of Nuclear and Particle Science; contains
TASI'05 Little Higgs lecture notes, 44 page
Assessing soybean leaf area and leaf biomass by spectral measurements
Red and photographic infrared spectral radiances were correlated with soybean total leaf area index, green leaf area index, chlorotic leaf area index, green leaf biomass, chlorotic leaf biomass, and total biomass. The most significant correlations were found to exist between the IR/red radiance ratio data and green leaf area index and/or green leaf biomass (r squared equals 0.85 and 0.86, respectively). These findings demonstrate that remote sensing data can supply information basic to soybean canopy growth, development, and status by nondestructive determination of the green leaf area or green leaf biomass
Recent Developments: Taylor v. State: Under Maryland Rule 5-806, a Party May Attack the Credibility of a Hearsay Declarant during the Cross-Examination of a Testifying Witness but May Not Present Proof of a Declarant\u27s Misconduct
Please note that the matter discussed in this article has been expunged from Mr. Taylor\u27s record
It Really Is Just Trying to Help: The History of FASB and Its Role in Modern Accounting Practices
The effects of label design characteristics on perceptions of genetically modified food
Objective. To explore the effects on perceptions of labelling food for genetically modified content. Background: there is increasing public pressure for the compulsory labelling of genetically modified food content on all food products, and yet little is known about how the design and content of such food labels will influence product perceptions. The current research draws upon warning label research - a field in which the effect of label design manipulations on perceptions of, and responses to, potential or perceived risks is well documented. Method. Two experiments are reported that investigate how label design features influence the perception of genetically modified foods. The effects of label colour (red, blue and green), wording style (definitive vs. probabilistic and explicit vs. non-explicit) and information source (government agency, consumer group and manufacturer) on hazard perceptions and purchase intentions were measured. Results. Hazard perceptions and purchase intentions were both influenced by label design characteristics in predictable ways. Any reference to genetic modification, even if the label is stating that the product is free of genetically modified ingredients, increased hazard perception, and decreased purchase intentions, relative to a no-label condition. Conclusion. Label design effects generalise from warning label research to influence the perception of genetically modified foods in predictable ways. Application. The design of genetically modified food labels. Ā© 2012 Copyright Taylor and Francis Group, LLC
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