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The Thule Society

The Thule Society was a secret brotherhood where Hitler and the other pioneers of German National Socialism first met in Munich in 1919-20.

Observer Backstepping for Nonlinear Drive Control

This paper addresses the control problem of a specially designed nonlinear actuator intended for use in legged robots and other related mechatronic devices. Use of this drive could considerably increase energy efficiency and the time of autonomous robot operation. Nevertheless, the highly nonlinear model of the actuator and the unavailability of part of the state for measurement pose considerable

Food Security, agricultural technology and policy – the case of maize in sub-Saharan Africa

This paper discusses food security and the African food crisis. By means of data from a survey of over 3000 farm households in eight sub-Saharan countries, the authors conclude that food security requires a broad integration of smallholders in the market. Subsistence orientation does not promote food security, while seed fertilizer technology does. Market integration of maize producers seems to be