University of Windsor

About: University of Windsor is a education organization based out in Windsor, Ontario, Canada. It is known for research contribution in the topics: Population & Argumentation theory. The organization has 10654 authors who have published 22307 publications receiving 435906 citations. The organization is also known as: UWindsor & Assumption University of Windsor.

Laser spectroscopic determination of the 6He nuclear charge radius.

Abstract: We have performed precision laser spectroscopy on individual $^{6}\mathrm{H}\mathrm{e}$ (${t}_{1/2}=0.8\text{ }\text{ }\mathrm{s}$) atoms confined and cooled in a magneto-optical trap, and measured the isotope shift between $^{6}\mathrm{H}\mathrm{e}$ and $^{4}\mathrm{H}\mathrm{e}$ to be $43\text{ }\text{ }194.772\ifmmode\pm\else\textpm\fi{}0.056\text{ }\text{ }\mathrm{M}\mathrm{H}\mathrm{z}$ for the ${2}^{3}{S}_{1}\ensuremath{-}{3}^{3}{P}_{2}$ transition. Based on this measurement and atomic theory, the nuclear charge radius of $^{6}\mathrm{H}\mathrm{e}$ is determined for the first time in a method independent of nuclear models to be $2.054\ifmmode\pm\else\textpm\fi{}0.014\text{ }\text{ }\mathrm{f}\mathrm{m}$. The result is compared with the values predicted by a number of nuclear structure calculations and tests their ability to characterize this loosely bound halo nucleus.

Invasion genetics of the Ciona intestinalis species complex: from regional endemism to global homogeneity

Abstract: Determining the degree of population connectivity and investigating factors driving genetic exchange at various geographical scales are essential to understanding population dynamics and spread potential of invasive species. Here, we explore these issues in the highly invasive vase tunicate, Ciona intestinalis, a species whose invasion history has been obscured by its poorly understood taxonomy and population genetics. Recent phylogenetic and comparative genomic studies suggest that C. intestinalis is a cryptic species complex consisting of at least three species. We reconstructed phylogenies based on both mitochondrial (cytochrome c oxidase subunit 3—NADH dehydrogenase subunit 1 region and NADH dehydrogenase subunit 4 gene) and nuclear (internal transcribed spacer 1) sequences, results of which support four major phylogroups corresponding to the previously reported spA, spB and Ciona spp. (spC) as well as an undescribed cryptic species (spD). While spC and spD remain restricted to their native ranges in the Mediterranean Sea and Black Sea, respectively, the highly invasive species (spA and spB) have disjunct global distributions. Despite extensive interspecific divergences, we identified low phylogeographical structure within these two invasive species. Haplotype network analyses revealed comparatively limited mutation steps among haplotypes within each species. Population genetic analyses based on two mtDNA fragments and eight unlinked microsatellites illustrated relatively low population differentiation and high population connectivity at both regional and continental scales in the two invasive species. Human-mediated dispersal coupled with a high potential for natural dispersal is probably responsible for the observed genetic homogeneity.

Informal Logic: A Pragmatic Approach

Abstract: 1. Argument as reasoned dialogue 2. Questions and answers in dialogue 3. Criticism of irrelevance 4. Appeals to emotion 5. Valid arguments 6. Personal attack in argumentation 7. Appeals to authority 8. Inductive errors, bias, and fallacies 9. Natural language argumentation.