US—Soviet talks on psychiatry

On Talks

What I have to say may be regarded as provocative or even insulting, but I think it needs to be said. In the history of medicine, a substantial number of lectures, seminars, and papers given at conferences and symposia-let's call them talks-are very difficult to follow, and a few are utterly incomprehensible. Very rarely is this because speakers have failed to master their subject. It is simply...

Practical Talks on Kidney Disease

Climate change talks stumble on

At the twelfth hour of the UN climate change meeting in Cancún last month, negotiators from more than 200 countries managed to prevent the collapse of the 20-year-old climatechange-negotiating process but otherwise achieved little in concrete new moves to build on the Kyoto protocol, a legal commitment to reduce carbon emissions by some industrialised countries, which expires next year. But the...

Plenary Talks

Invited Talks

In 2009, Peter Cameron introduced a common generalization of various classes of combinatorial designs such as balanced incomplete block designs, resolvable designs and orthogonal arrays. Generalized covering and packing designs can be defined in analogous way. These objects bring into this framework further classes of designs, including covering and packing arrays, Howell designs, monogamous cy...