The culture of algae and its applications

An article explaining how the methods and results from the time spent by the author culturing algae can be applied to other algal investigations. The work by the author found that physiological requirements differ widely among algae belonging to different systematic groups. Details are given of the results of a series of experiments which were undertaken in solutions with similar proporties to some natural waters in the Lake District. Reference is made to a paper under preparation at that time containing data on phytoplankton studied in the field within the Lake District during 1937. Reference is also made to Loch Leven and the affects of bluegreen alga on the number of trout caught weekly during 1937

The G-Signature Theorem Revisited

In a strengthening of the G-Signature Theorem of Atiyah and Singer, we compute, at least in principle (modulo certain torsion of exponent dividing a power of the order of G), the class in equivariant K-homology of the signature operator on a G-manifold, localized at a prime idea of R(G), in terms of the classes in non-equivariant K-homology of the signature operators on fixed sets. The main innovations are that the calculation takes (at least some) torsion into account, and that we are able to extend the calculation to some non-smooth actions.Comment: 14 pages, to be published in Proc. International Workshop on Topology, M. Farber, W. Lueck, and S. Weinberger, editors, Contemporary Mathematics, Amer. Math. Soc. The volume is dedicated to Mel Rothenber

The Weaponization of Space: Divided Viewpoints, Uncertain Directions

Outlines the discussions around the issue of space-based weaponry, what role global leaders should play in addressing the issue, and its effect on the delicate political and military balances that have existed between the U.S. and other countries