Wind at Northern Senja: Use of numerical weather prediction models for wind resource assessment

Wind resource assessment for establishing decentralized power production in remote and complex areas, is challenging due to a lack of observational data. To overcome this problem, Numerical Weather Prediction (NWP) models can be used to provide data where no observations exist. This thesis uses NWP models to do a wind resource assessment at northern Senja. The power grid in the area is prone to voltage drops, and decentralized power production would release some transmission capacity. The study is twofold: The first part investigated the model performance at three observation sites Hekkingen, Innhesten, and Senjahopen. The second part is a wind resource assessment based on model data. Calculated statistical scores and wind roses showed that Arome 500 with a horizontal resolution of 0.5 km was the best model for predicting wind speed and direction in the fjords at northern Senja. Furthermore, no evident correlation between Arome 500, AROME-Arctic and NORA3 could be concluded from the statistical scores and wind roses, mainly due to short overlapping periods and datasets. Production estimates at Mykjeneset, Giskhaugen, and Sporra were computed from three Enercon wind turbines' power curves. Two levels of turbulence corrections were applied. Before any turbulence corrections; Sporra showed the highest annual energy production of 2587 MWh and a capacity factor of 36.8% for the Enercon E-53 turbine. After the turbulence corrections, the same turbine had the highest annual energy output at Giskhaugen of 2180 Mwh and a capacity factor of 31%

The Alternative to Occupy:Radical Politics Between Protest and Parliament

In this paper, we compare the political anatomy of two distinct enactments of (leftist) radical politics: Occupy Wall Street and The Alternative, a recently elected political party in Denmark. Departing from Ernesto Laclau’s conceptualization of ‘the universal’ and ‘the particular’, we show how the institutionalization of radical politics (as carried out by The Alternative) entails a move from universality towards particularity. This move, however, comes with the risk of cutting-off supporters who no longer feel represented by the project. We refer to this problem as ‘the problem of particularization’. In conclusion, we use the analysis to propose a conceptual distinction between radical movements and radical parties: While the former is constituted by an infinite chain of equivalent grievances, the latter is constituted by a prioritized set of differential demands. While both are important, we argue, they must remain distinct in order to preserve the universal spirit of contemporary radical politic

Toward optimal X-ray flux utilization in breast CT

A realistic computer-simulation of a breast computed tomography (CT) system and subject is constructed. The model is used to investigate the optimal number of views for the scan given a fixed total X-ray fluence. The reconstruction algorithm is based on accurate solution to a constrained, TV-minimization problem, which has received much interest recently for sparse-view CT data.Comment: accepted to the 11th International Meeting on Fully Three-Dimensional Image Reconstruction in Radiology and Nuclear Medicine 201