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The Swedish Gypsy Experts

The study of the history of the Gypsies in Sweden shows a marked continuity over time in regard both to content and starting point.It deals with two themes: the particular 'nature' of the Gypsies and their relation vis-á-vis the authorities. The point of departure is that the Gypsies are a foreign, 'secretive' and 'inaccesible' people, whose 'otherness' can not be accepted. Consequently they must

Institutions and Social Mobilization

Social movements are series of sustained interactions and collective actions, contentious performances, displays and campaigns by ordinary people outside established political institutions. Yet, why do certain movements persist over a significant period of time while some do not? How do those that persist, sustain themselves and overcome constraints over time, especially those imposed by non-liber

On the Expanding Properties of Gallager's LDPC Matrices

This paper investigates expanding properties of ensembles of random bipartite graphs whose adjacency matrices are Gallager's low-density parity-check matrices. Two methods for calculating the expansion coefficient are demonstrated. It is shown that in the ensemble of the considered bipartite graphs, there exist graphs which have better expanding properties than the previously known expanders.

Design of close to optimal Euclidean distance MIMO-precoders

In this work we study the problem of constructing precoders for spatially multiplexed multiple-input multiple output (MIMO) channels with close to optimal minimum Euclidean distance. In order to exploit the full potential of such designs, an ML detector must be used. Our design takes the decoding complexity into account and constrain it to a reasonable level. For our simplest case, the ML detector