The Determination of the Effective Resistance of a Spindle Supporting a Model Airfoil

An attempt was made to determine the effect of spindle interference on the lift of the airfoil by measuring moments about the axis parallel to the direction of air flow. The values obtained are of the same degree as the experimental error, and for the present this effect will be neglected. The results obtained using a U.S.A. 15 wing (plotted here) show that the correction is nearly constant from 0 degrees to 10 degrees incidence and that at greater angles its value becomes erratic. At such angles, however, the wing drag is so high that the spindle correction and its attendant errors become relatively small and unimportant

The Optimal Single Copy Measurement for the Hidden Subgroup Problem

The optimization of measurements for the state distinction problem has recently been applied to the theory of quantum algorithms with considerable successes, including efficient new quantum algorithms for the non-abelian hidden subgroup problem. Previous work has identified the optimal single copy measurement for the hidden subgroup problem over abelian groups as well as for the non-abelian problem in the setting where the subgroups are restricted to be all conjugate to each other. Here we describe the optimal single copy measurement for the hidden subgroup problem when all of the subgroups of the group are given with equal a priori probability. The optimal measurement is seen to be a hybrid of the two previously discovered single copy optimal measurements for the hidden subgroup problem.Comment: 8 pages. Error in main proof fixe

Stories in distress: Three case studies in Australian media coverage of humanitarian crises

This article reviews three case studies in the Australian media reporting of international humanitarian crises. The case studies cover a six-month period in 1999 and draw on all media over that period. Thethree case studies are: the violence in East TImor at the time of the 1999 independence ballot, the imprisonment in Yugoslavia of Prall and Wallace, two employees of CARE Australia, and the floods in Mozambique. While the three case studies collectively exhibit many of the standard characteristics ofmedia coverage ofhumanitarian issues, individually they differ significantly in the scale and orientation ofcoverage. Wesuggest that a significantfactor in these differences was the relationship between the sources for the stories and the journalists, which in turn depended on other factors. We review the adequacy of the Hall and Ericson positions on the source-journalist relationship in explaining these differences, and suggest that a field analysis derivedfrom Bourdieu is helpful in explaining the involvement ofsources from the political, economic and military fields, which in turn impacted on the relationship ofthe media to the stories