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On Structural Identifiability

In this article we introduce a new concept, structural identifiability, which plays a central role in identification problems. The concept is useful when answering questions such as: To what extent is it possible to get insight into the internal structure of a system from input-output measurements? What experiments are necessary in order to determine the internal couplings uniquely? The definition

Patient experienced side effects and adverse events after cancer treatment - Patient initiated research

Background: In the literature radiation of head and neck cancer (HNC) is followed by late side effects for more than a third of the patients. However, nearly all patients seem to experience side effects. The aim was to collect the multitude of these experiences through a patient-developed detailed questionnaire. Methods: 77 of 117 patients responded to a validated questionnaire from the Danish HN

Functional co-operation between the subunits in heterodimeric platelet-derived growth factor receptor complexes

To determine the importance of the phosphorylation capacity of receptor kinase as well as the ability to serve as docking sites for SH2-domain-containing signal transduction molecules, we established pig aortic endothelial cell lines stably expressing kinase-active platelet-derived growth factor (PDGF) alpha-receptors together with kinase-inactive beta-receptors, and vice versa. After stimulation

Influence of optimised treatment of people with hip fracture on time to operation, length of hospital stay, reoperations and mortality within 1 year.

Hip fractures are a major cause of hospital stay among the elderly, and result in increased disability and mortality. In this study from 1 April 2003 to 31 March 2004, the influence of optimised treatment of hip fracture on time to operation, length of hospital stay, reoperations and mortality within 1 year were investigated. Comparisons were made between the first 210 patients in the period and t

Non-uniform fractional tessellation

We present a variation of fractional tessellation to provide more uniformly distributed tessellation in screen space. Tessellation weights are added at the vertices for added flexibility and we show that the quality is improved at a minor cost.

A Voyage to Vardø – A Scientific Account of an Unscientific Expedition

After the “Venus Transit Conference” that took place at the University of Tromsø from June 2 to June 3, 2012, participants were given the opportunity to either stay in Tromsø until the night of June 5–6, or to participate in a voyage to Finnmark, where the historical sites Vardø, Hammerfest, and the North Cape were to be visited. This voyage culminated in the observation of the 2012 transit of Ven