31,571 research outputs found
MsatAllele_1.0: An R package to visualize the binning of microsatellite Alleles
MsatAllele is a computer package built on R to visualize and bin the raw microsatellite allele size distributions. The method is based on the creation of an R database with exported files from the open-source electropherogram peak-reading program STRAND. Contrary to other binning programs, in this program, the bin limits are not fixed and are automatically defined by the data stored in the database. Data manipulation and graphical functions allow to 1) visualize raw allele size variation, allowing the detection of potential scoring errors, strange bin distributions, and unexpected spacing between the bins; 2) bin raw fragment sizes and write bin summary statistics for each locus; and 3) export genotype files with the resulting binned data.Fundacao para a Ciencia e Tecnologia [SFRH/BPD/14945/2004]; MEGIKELP [PTDC/MAR/65461/2006]info:eu-repo/semantics/publishedVersio
New nonlinear structures in a degenerate one-dimensional electron gas
The collective dynamics of nonlinear electron waves in an one-dimensional
degenerate electron gas is treated using the Lagrangian fluid approach. A new
class of solutions with a nontrivial space and time dependence is derived. Both
analytical and numerical results demonstrate the formation of stable,
breather-like modes, provided certain conditions are meet. For large amplitude
of the initial density perturbation, a catastrophic collapse of the plasma
density is predicted, even in the presence of the quantum statistical pressure
and quantum diffraction dispersive effects. The results are useful for the
understanding of the properties of general nonlinear structures in dense
plasmas
Large sample asymptotics for the two-parameter Poisson--Dirichlet process
This paper explores large sample properties of the two-parameter
Poisson--Dirichlet Process in two contexts. In a Bayesian
context of estimating an unknown probability measure, viewing this process as a
natural extension of the Dirichlet process, we explore the consistency and weak
convergence of the the two-parameter Poisson--Dirichlet posterior process. We
also establish the weak convergence of properly centered two-parameter
Poisson--Dirichlet processes for large This latter result
complements large results for the Dirichlet process and
Poisson--Dirichlet sequences, and complements a recent result on large
deviation principles for the two-parameter Poisson--Dirichlet process. A
crucial component of our results is the use of distributional identities that
may be useful in other contexts.Comment: Published in at http://dx.doi.org/10.1214/074921708000000147 the IMS
Collections (http://www.imstat.org/publications/imscollections.htm) by the
Institute of Mathematical Statistics (http://www.imstat.org
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