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Comparison of standard resampling methods for performance estimation of artificial neural network ensembles

Estimation of the generalization performance for classification within the medical applications domain is always an important task. In this study we focus on artificial neural network ensembles as the machine learning technique. We present a numerical comparison between five common resampling techniques: k-fold cross validation (CV), holdout, using three cutoffs, and bootstrap using five different

On The Road: Following Ethnography From Orange County to Madison Avenue

Ethnography is a very abstract concept, but often perceived as a very concrete practice, but what is hidden in the slippage between the abstract and concrete, as ethnography moves. While a great deal has been written and debated about the practices, methods and outcomes of applied research, and we appreciate these debates, our own point of departure lies in a curiosity over what happens in the pro

Theory of Random Matrices and Elasticity Applied to Nanowires and Mechanical Vibrations

This thesis presents work in several areas relating to Random Matrix Theory and Elasticity. It contains 4 papers presenting work on different issues. Paper I concerns correlations between eigenvalues in random matrices of real symmetric (GOE) or quaternion real (GSE) form. It presents a calculation showing that correlations between arbitrarily many eigenvalues can be obtained from averages of a t

Temperamental diagnostics and biochemistry in suicide attempters

The aim of the present thesis was to study temperament traits and their relationships to psychiatric diagnoses, suicidal behavior and a number of biological measures in a sample of hospitalized suicide attempters. The subjects showed a bimodal distribution on the Validity scale from the Marke-Nyman Temperament (MNT) inventory, with a large subgroup showing low Validity. Cluster analyses of the sc

Free space performance comparison of MIMO terminal antennas in noise- and interference-limited urban environments

This contribution comprises a comparison of capacity performances of MIMO terminal antenna configurations for smart phones at 2.65 GHz, measured in an extensive 2×2 MIMO measurement campaign in noise- and interference-limited urban environments. Whereas, on average along the route, the performances where dictated by the received power, locally the eigenvalue dispersion of the communication channel

Minimizing the time spent on transformations between computer independent models and platform independent models

Abstract. A well known trade-off effect with modelling is that when it is user friendly it becomes ambiguous and when it has a formal notation, that makes it unambiguous, it becomes less user friendly. A well known solution to this dilemma is to use models on various levels of formalism where the least formalized models are known to be more user friendly and the most formalized models are well sui