Currently browsing: Items authored or edited by Steffen Unkel

Farrington, C. Paddy; Unkel, Steffen and Anaya-Izquierdo, Karim (2013). Estimation of basic reproduction numbers: individual heterogeneity and robustness to perturbation of the contact function. Biostatistics, 14(3) pp. 528–540.

Farrington, Paddy; Whitaker, Heather; Unkel, Steffen and Pebody, Richard (2013). Correlated infections: quantifying individual heterogeneity in the spread of infectious diseases. American Journal of Epidemiology, 177(5) pp. 474–486.

Trendafilov, Nickolay; Unkel, Steffen and Krzanowski, Wojtek (2013). Exploratory factor and principal component analyses: some new aspects. Statistics and Computing, 23(2) pp. 209–220.

Unkel, Steffen and Trendafilov, Nickolay T. (2013). Zig-zag exploratory factor analysis with more variables than observations. Computational Statistics, 28(1) pp. 107–125.

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Unkel, Steffen and Farrington, C. Paddy (2012). A new measure of time-varying association for shared frailty models with bivariate current status data. Biostatistics, 13(4) pp. 665–679.

Farrington, Paddy; Unkel, Steffen and Anaya-Izquierdo, Karim (2012). The relative frailty variance and shared frailty models. Journal of the Royal Statistical Society: Series B (Statistical Methodology), 74(4) pp. 673–696.

Unkel, Steffen; Farrington, Paddy; Garthwaite, Paul; Robertson, Chris and Andrews, Nick (2012). Statistical methods for the prospective detection of infectious disease outbreaks: a review. Journal of the Royal Statistical Society: Series A (Statistics in Society), 175(1) pp. 49–82.

Unkel, Steffen; Hannachi, Abdel; Trendafilov, Nickolay T. and Jolliffe, Ian T. (2011). Independent component analysis for three-way data with an application from atmospheric science. Journal of Agricultural, Biological, and Environmental Statistics, 16(3) pp. 319–338.

Trendafilov, Nickolay T. and Unkel, Steffen (2011). Exploratory factor analysis of data matrices with more variables than observations. Journal of Computational and Graphical Statistics, 20(4) pp. 874–891.

Unkel, S. and Trendafilov, N. T. (2010). A majorization algorithm for simultaneous parameter estimation in robust exploratory factor analysis. Computational Statistics and Data Analysis, 54(12) pp. 3348–3358.

Unkel, Steffen; Trendafilov, Nickolay T.; Hannachi, Abdel and Jolliffe, Ian T. (2010). Independent exploratory factor analysis with application to atmospheric science data. Journal of Applied Statistics, 37(11) pp. 1847–1862.

Unkel, Steffen and Trendafilov, Nickolay T. (2010). Simultaneous parameter estimation in exploratory factor analysis: an expository review. International Statistical Review, 78(3) pp. 363–382.

Hannachi, A.; Unkel, S.; Trendafilov, N. T. and Joliffe, I. T. (2009). Independent component analysis of climate data: a new look at EOF rotation. Journal of Climate, 22(11) pp. 2797–2812.

Unkel, Steffen and Trendafilov, Nickolay (2009). Factor analysis as data matrix decomposition: a new approach for quasi-sphering in noisy ICA. In: Adali, Tülay; Jutten, Christian; Romano, João MarcosTravassos and Barros, Allan Kardec eds. Independent Component Analysis and Signal Separation: 8th International Conference, ICA 2009, Paraty, Brazil, March 15-18, 2009. Proceedings. Lecture Notes in Computer Science (5441). Berlin: Springer, pp. 163–170.

Unkel, Steffen (2009). Factor Analysis of Data Matrices: New Theoretical and Computational Aspects With Applications. PhD thesis The Open University.

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Unkel, Steffen and Trendafilov, Nickolay T (2007). Noisy independent component analysis as a method of rotating the factor scores. In: Davies, Mike E; James, Christopher J; Abdallah, Samer A and Plumbley, Mark D eds. Independent Component Analysis and Signal Separation: 7th International Conference, ICA 2007, London, UK, September 9-12, 2007. Proceedings. Lecture Notes in Computer Science (4666). Berlin: Springer, pp. 810–817.