Search Results for author: Steffen Koch

Found 7 papers, 2 papers with code

Real-Time Visual Analysis of High-Volume Social Media Posts

no code implementations6 Aug 2021 Johannes Knittel, Steffen Koch, Tan Tang, Wei Chen, Yingcai Wu, Shixia Liu, Thomas Ertl

In contrast to previous work, our system also works with non-geolocated posts and avoids extensive preprocessing such as detecting events.

Efficient Sparse Spherical k-Means for Document Clustering

1 code implementation30 Jul 2021 Johannes Knittel, Steffen Koch, Thomas Ertl

Spherical k-Means is frequently used to cluster document collections because it performs reasonably well in many settings and is computationally efficient.

Short Text Clustering Unsupervised Spatial Clustering

ELSKE: Efficient Large-Scale Keyphrase Extraction

1 code implementation10 Feb 2021 Johannes Knittel, Steffen Koch, Thomas Ertl

Keyphrase extraction methods can provide insights into large collections of documents such as social media posts.

Information Retrieval Keyphrase Extraction +2

Visual Neural Decomposition to Explain Multivariate Data Sets

no code implementations11 Sep 2020 Johannes Knittel, Andres Lalama, Steffen Koch, Thomas Ertl

Investigating relationships between variables in multi-dimensional data sets is a common task for data analysts and engineers.

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