1,720,980 research outputs found
BAS v1.4.0
No full text<a class="anchor" href="#new-features"><span class="octicon octicon-link"></span></a>New features
<ul>
<li>added na.action for bas.lm and bas.glm to omit missing data.</li>
<li>new function to plot credible intervals created by confint.pred.bas or confint.coef.bas. See the help files for an example or the vignette.</li>
<li>added se.fit option in predict.basglm.</li>
<li>Added testBF as a betaprior option for bas.glm to implement Bayes Fatcors based on the likelihood ratio statistic's distribution for GLMs.</li>
</ul>
merliseclyde/BAS: BAS Version 1.4.1
No full textBug Fixes
<ul>
<li>the modification in 1.4.0 to automatically handle NA's led to
errors if the response was transformed as part of the forumula;
this is fixed in this release</li>
</ul>
New Features
<ul>
<li>added subset argument to <code>bas.lm</code> and <code>bas.glm</code> so that arguments match standard lm and glm in R</li>
</ul>
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Constrained design strategies for improving normal approximations in nonlinear regression problems
No full text
The Equivalence of Constrained and Weighted Designs in Multiple Objective Design Problems
No full textSeveral competing objectives may be relevant in the design of an experiment. The competing objectives may not be easy to characterize in a single optimality criterion. One approach to these design problems has been to weight each criterion and find the design that optimizes the weighted average of the criteria. An alternative approach has been to optimize one criterion subject to constraints on the other criteria. An equivalence theorem is presented for the Bayesian constrained design problem. Equivalence theorems are essential in verifying optimality of proposed designs, especially when, as in most nonlinear design problems, numerical optimization is required. This theorem is used to show that the results of Cook and Wong on the equivalence of the weighted and constrained problems also apply much more generally. The results are applied to Bayesian nonlinear design problems with several objectives. KEY WORDS: Bayesian design, regression, nonlinear design 1. INTRODUCTION An experimen..
Constrained Design Strategies for Improving Normal Approximations in Nonlinear Regression Problems
No full textthis paper, in contrast, is how the experimental design influences the normal approximation in nonlinear regression. Design criteria that reflect the primary goal of an experiment are reviewed in Section 1.2. In Section 2 methods are given for calculating the Bates and Watts (1980) curvature arrays in terms of design measures. A new notation for representing curvature arrays is introduced in Section 2 and explained further in Appendix A. Appendix B presents some theoretical results on designs that minimize intrinsic curvature. In Section 3 it is argued that a good design procedure is one where a primary design criterion is maximized subject to constraints based on summaries of the curvature measures (Appendix C) that help ensure the accuracy of the normal approximation. The constraints, and hence the designs, depend on the sample size. Examples are given in Sections 4, 5, 6 and 7 of
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
- …
