The three-dimensional problem of wave trapping above a submerged round sill was first analysed by Longuet-Higgins on the basis of a linear shallow-water theory. The large responses predicted by the theory were, however, not well borne out by the experiments of Barnard, Pritchard & Provis, and this has motivated a more detailed study of the problem. A full linear theory for both inviscid and wea...

This paper is the second in a series exploring the properties of a functor which assigns a homotopy double groupoid with connections to a Hausdorff space. We show that this functor satisfies a version of the van Kampen theorem, and so is a suitable tool for nonabelian, 2-dimensional, local-to-global problems. The methods are analogous to those developed by Brown and Higgins for similar theorems...

Better than nothing or savvy risk-reduction practice? The importance of withdrawal Rachel K. Jones, Julie Fennell, Jenny A. Higgins and Kelly Blanchard Corresponding author: Rachel K. Jones, Guttmacher Institute, New York, NY 10038, [email protected], 212.248.1111 X2262 Julie Fennell: Sociology Dept, Central Connecticut State University, New Britain, CT 06050 Jenny A. Higgins: Office of Pop...

In 1914, Margaret Sanger published ?Family Limitations,? a pamphlet describing six different types of contraceptive methods. At the time Sanger published the pamphlet, the federal Comstock Act of 1873 [4] had made distributing contraceptive and abortion [5] information through the US postal service illegal. The Comstock Act classified contraceptive information as obscene and limited the amount ...

The effect of taxes and benefits on the poor is usually measured using standard poverty and inequality indicators, stochastic dominance tests, and measures of progressivity and horizontal inequity. However, these measures can fail to capture an important aspect: that some of the poor are made poorer (or some of the non-poor made poor) by the tax-benefit system. We call this impoverishment and f...

In this paper we study the dynamics of Higgins–Selkov system style='text-indent:20px;'> \begin{document}$ \begin{equation*} \dot{x} = 1-xy^\gamma, \quad\dot{y} \alpha y(xy^{\gamma -1}-1), \end{equation*} $\end{document} style='text-indent:20px;'>where \begin{docum...

Vol. XLIII (February 2006), 24–27 24 © 2006, American Marketing Association ISSN: 0022-2437 (print), 1547-7193 (electronic) *Tamar Avnet is Assistant Professor of Business, Rotman School of Management, University of Toronto (e-mail: [email protected]). E. Tory Higgins is Professor of Psychology, Department of Psychology, and Professor of Management, Columbia School of Business, Columbia...