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Voltage and frequency control for island operated induction generators

Abstract in Undetermined Over the last few years the interest in distributed generationand island operation of small production units hasincreased. Many of the existing such units are hydro power stations with induction generators. These are not initiallyconstructed for island operation, but with some extraequipment this kind of operation is feasible. In this paper the behaviour of two parallel-op

Ultra low power hardware for computing squared euclidean distances

Computing Euclidean Distances is a very important operation in digital communication, especially in the case of trellis coded modulation, where it is used numerously. This paper shows that a substantial reduction in complexity can be achieved in hardware processing elements for computing Euclidean Distances. A reduction in complexity down to 34% is shown compared to traditional designs. The paper

Social Mobility in Nineteenth Century Rural Sweden - A Micro Level Analysis

Preindustrial rural societies have often been pictured as stationary and immobile both geographically and socially. In the last decades this image has begun to change, especially as regards geographical mobility, while our knowledge of social mobility of rural preindustrial Europe is still rudimentary. This study focus on social attainment and mobility in a rural community of nineteenth century so

Analysis of Approximations to Dual Control

The dual control problem for time-varying or non-linear systems is inherently analytically and computationally untractable due to the demand of alternating minimizations and mean value computations. Hence, it has to be approached using approximations leading to suboptimal dual control. The core of the successful approximative controller is its ability to be able to consider future changes in the d

Psychological momentum in handball

This doctoral dissertation deals with a phenomenon that is often referred to in sports, but still poorly understood from a scientific angle: psychological momentum (PM). No consensus has been agreed on how to label this phenomenon, and other terms such as momentum or behavioural momentum (BM) are often used interchangeably. In everyday language, PM can be explained by periods in a match where ever