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Biometry (Latest Articles)
Latest indexed articles for 'Biometry'
Articles 81 to 90 of 200:
Modelling tree roots in mixed forest stands by inhomogeneous marked Gibbs point processes.
30 May 2009 
The aim of the paper is to apply point processes to root data modelling. We propose a new approach to parametric inference when the data are inhomogeneous replicated marked point patterns. We generalize Geyer's saturation point process to a model, ...
rec_pub_19572316-modelling-tree-roots-mixed-forest-stands-inhomogeneous-marked-gibbs.htm
Household epidemics: modelling effects of early stage vaccination.
30 May 2009 A Markovian susceptible --> infectious --> removed (SIR) epidemic model is considered in a community partitioned into households. A vaccination strategy, which is implemented during the early stages of the disease following the detection of infected ...
rec_pub_19548285-household-epidemics-modelling-effects-early-stage-vaccination.htm
Measures of disassortativeness and their application to directly transmitted infections.
30 May 2009 We propose a measure of disassortativeness to summarize contact patterns relevant to the transmission of directly transmitted infections. We discuss the properties of this measure, describe standardization relative to homogeneous mixing, and ...
rec_pub_19492337-measures-disassortativeness-application-directly-transmitted.htm
Presence-only data and the em algorithm.
30 May 2009 SUMMARY: In ecological modeling of the habitat of a species, it can be prohibitively expensive to determine species absence. Presence-only data consist of a sample of locations with observed presences and a separate group of locations sampled from ...
rec_pub_18759851-presence-data-em-algorithm.htm
A Bayesian approach to modeling associations between pulsatile hormones.
30 May 2009 SUMMARY: Many hormones are secreted in pulses. The pulsatile relationship between hormones regulates many biological processes. To understand endocrine system regulation, time series of hormone concentrations are collected. The goal is to ...
rec_pub_18759850-a-bayesian-approach-modeling-associations-pulsatile-hormones.htm
Exact confidence bounds following adaptive group sequential tests.
30 May 2009 SUMMARY: We provide a method for obtaining confidence intervals, point estimates, and p-values for the primary effect size parameter at the end of a two-arm group sequential clinical trial in which adaptive changes have been implemented along the ...
rec_pub_18759843-exact-confidence-bounds-following-adaptive-group-sequential-tests.htm
Mixed-effect hybrid models for longitudinal data with nonignorable dropout.
30 May 2009 SUMMARY: Selection models and pattern-mixture models are often used to deal with nonignorable dropout in longitudinal studies. These two classes of models are based on different factorizations of the joint distribution of the outcome process and the ...
rec_pub_18759842-mixed-effect-hybrid-models-longitudinal-data-nonignorable-dropout.htm
Joint modeling and analysis of longitudinal data with informative observation times.
30 May 2009 SUMMARY: In analysis of longitudinal data, it is often assumed that observation times are predetermined and are the same across study subjects. Such an assumption, however, is often violated in practice. As a result, the observation times may be ...
rec_pub_18759841-joint-modeling-analysis-longitudinal-data-informative-observation.htm
Median regression models for longitudinal data with dropouts.
30 May 2009 SUMMARY: Recently, median regression models have received increasing attention. When continuous responses follow a distribution that is quite different from a normal distribution, usual mean regression models may fail to produce efficient estimators ...
rec_pub_18759840-median-regression-models-longitudinal-data-dropouts.htm
On assessing surrogacy in a single trial setting using a semicompeting risks paradigm.
30 May 2009 SUMMARY: There has been a recent emphasis on the identification of biomarkers and other biologic measures that may be potentially used as surrogate endpoints in clinical trials. We focus on the setting of data from a single clinical trial. In this ...
rec_pub_18759839-on-assessing-surrogacy-single-trial-setting-using-semicompeting-risks.htm
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