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83 Publications visible to you, out of a total of 83
An explorative approach for inspecting Kepler data

Abstract

Not specified

Authors: Sven D. Kügler, Nikolaos Gianniotis, Kai L. Polsterer

Date Published: 2016

Publication Type: Journal

Parallelized rotation and flipping INvariant Kohonen maps (PINK) on GPUs

Abstract

Not specified

Authors: Kai L. Polsterer, Fabian Gieseke, Christian Igel, Bernd Doser, Nikolaos Gianniotis

Date Published: 2016

Publication Type: InProceedings

On the application of machine learning approaches in astronomy: Exploring novel representations of high-dimensional and complex astronomical data

Abstract (Expand)

The goal of the presented work is the application of data-driven methods on complex and high- dimensional astronomical databases. The focus of the work is the exploration of novel data representations … in order to enable the use of statistical learning approaches in the analysis of data. With the help of diverse science cases, the advantages of the introduced approaches for classication, visualization and regression tasks are shown by applying the developed methodology to astronomical data. In the first part, an alternative approach for estimating redshifts of spectra by using the knowledge about the redshifts provided by the SDSS pipeline is presented. A novel data repre- sentation is employed which contains only information relevant for estimating the redshift and the detection of multiple redshift systems. Subsequently, a novel data representation for regu- larly sampled light curves based on recurrent networks is presented. This allows an explorative investigation of huge databases with unlabeled data. Finally, a new way of representing the static part of irregularly sampled light curves by a mixture of Gaussians is discussed. This represen- tation is more general than the extraction of features, as it allows the inclusion of photometric uncertainties and avoids the introduction of observational biases.

Author: Sven Dennis Kugler

Date Published: 9th Dec 2015

Publication Type: Doctoral Thesis

Clustering of Complex Data-Sets Using Fractal Similarity Measures and Uncertainties

Abstract

Not specified

Authors: Maximilian Hoecker, Kai Lars Polsterer, Sven Dennis Kugler, Vincent Heuveline

Date Published: 1st Oct 2015

Publication Type: InProceedings

Radio Galaxy Zoo: host galaxies and radio morphologies derived from visual inspection

Abstract

Not specified

Authors: A. R. López-Sánchez, W. P. Maksym, K. L. Polsterer, K. Borden, R. P. Hollow, L. Whyte

Date Published: 25th Sep 2015

Publication Type: Journal

Automatic Galaxy Classification via Machine Learning Techniques: Parallelized Rotation/Flipping INvariant Kohonen Maps (PINK)

Abstract

Not specified

Authors: K. L. Polsterer, F. Gieseke, C. Igel

Date Published: 1st Sep 2015

Publication Type: InProceedings

Analyzing Complex and Structured Data via Unsupervised Learning Techniques

Abstract

Not specified

Authors: K. L. Polsterer, F. Gieseke, N. Gianniotis, S. D. Kuegler

Date Published: 1st Aug 2015

Publication Type: Journal

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