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Success and Failure of European Settler Farming in Sub-Saharan Africa

This paper ties into the growing literature on the long-term economic implications of historical European settlement, by arguing for the need to properly address the role of indigenous agency in endogenously evolving settlement processes. We develop three comparative case-studies in West, East and Southern Africa to show that the success or failure of European settler farming depended crucially on

Practical applications of adaptive control

The presentation gives examples of industrial adaptive controllers and of industrial applications of adaptive control. Adaptive control algorithms are found in single-loop controllers as well as in distributed control systems. Several commercial systems are available today. The given applications are mainly from the process control area. Adaptive control has many good aspects, but it also requires

Interaction effects in the transport of particles in nanowire quantum dots

Interactions between physical bodies constantly affect their properties. This thesis presents a theoretical study on the effects of interaction in few-body nanowire quantum dots. The focus is to a large extent on a phenomenon called Wigner localization, and how this, as well as other interaction effects, can be identified in an experiment by transport spectroscopy and by thermopower measurements.

Strangeness of twitter relations

In November 2009 a Swedish twitterer died in a car accident. Even though @Just_Tea wasn’t a celebrity, condolences and displays of public mourning stacked up from her followers and the Swedish blogosphere. However, there was also disapproving voices, criticizing the public displays of grief of someone whom few had met and even fewer could call friend. The criticism and the subsequent discussions o

Propagation of transient electromagnetic waves in time-varying media - Direct and inverse scattering problems

Wave propagation of transient electromagnetic waves in time-varying media is considered. The medium, which is assumed to be inhomogeneous and dispersive, lacks invariance under time translations. The spatial variation of the medium is assumed to be in the depth coordinate, i.e., it is stratified. The constitutive relations of the medium is a time integral of a generalized susceptibility kernel and

A General Method for Defining and Structuring Buffer Management Problems

In an industrial plant, availability is an important factor since increased availability often gives an increase of final production, which in many cases means an increased profit for the company. The purpose of using buffer tanks is to increase the availability either by separating production units from each other or by minimizing flow variations. However, the methods for achieving this goal is n

A green future with thawing permafrost mires? : a study of climate-vegetation interactions in European subarctic peatlands

Popular Abstract in Swedish Projektioner om framtida klimat i Arktis och subarktis tyder på att drastiska förändrinar väntar regionen under det närmaste århundradet. Inte bara temperaturen spås öka utan även nederbörd, och då framför allt nederbörden under vinterhalvåret. Dessa förändringar kommer sannolikt att ha stor inverkan på miljön i Arktis och subarktis, och stora forksningsansträngningar hClimate projections indicate that Arctic and sub-Arctic regions are facing a significant change in climate during the 21st century. With warmer temperatures precipitation is also expected to increase, and in particular winter precipitation. These changes are likely to have large impacts on the Arctic and subarctic environment, and extensive research has focused on ecosystem-climate interactions in