Search Results for author: Johannes Hirth

Found 13 papers, 1 papers with code

The Birkhoff completion of finite lattices

no code implementations2 May 2024 Mohammad Abdulla, Johannes Hirth, Gerd Stumme

We introduce the Birkhoff completion as the smallest distributive lattice in which a given finite lattice can be embedded as semi-lattice.

Conceptual Mapping of Controversies

no code implementations25 Apr 2024 Claude Draude, Dominik Dürrschnabel, Johannes Hirth, Viktoria Horn, Jonathan Kropf, Jörn Lamla, Gerd Stumme, Markus Uhlmann

With our work, we contribute towards a qualitative analysis of the discourse on controversies in online news media.

Navigate

The Geometric Structure of Topic Models

no code implementations6 Mar 2024 Johannes Hirth, Tom Hanika

We introduce and demonstrate the applicability of our approach based on a topic model derived from a corpus of scientific papers taken from 32 top machine learning venues.

Feature Compression Topic Models

Automatic Textual Explanations of Concept Lattices

no code implementations17 Apr 2023 Johannes Hirth, Viktoria Horn, Gerd Stumme, Tom Hanika

Our method is based on the general notion of ordinal motifs in lattices for the special case of standard scales.

Ordinal Motifs in Lattices

no code implementations10 Apr 2023 Johannes Hirth, Viktoria Horn, Gerd Stumme, Tom Hanika

Lattices are a commonly used structure for the representation and analysis of relational and ontological knowledge.

Scaling Dimension

no code implementations17 Feb 2023 Bernhard Ganter, Tom Hanika, Johannes Hirth

Conceptual Scaling is a useful standard tool in Formal Concept Analysis and beyond.

Conceptual Views on Tree Ensemble Classifiers

no code implementations10 Feb 2023 Tom Hanika, Johannes Hirth

Random Forests and related tree-based methods are popular for supervised learning from table based data.

Formal Conceptual Views in Neural Networks

1 code implementation27 Sep 2022 Johannes Hirth, Tom Hanika

Explaining neural network models is a challenging task that remains unsolved in its entirety to this day.

Research Topic Flows in Co-Authorship Networks

no code implementations16 Jun 2022 Bastian Schäfermeier, Johannes Hirth, Tom Hanika

Based on a multi-graph and a topic model, our proposed network structure accounts for intratopic as well as intertopic flows.

Community Detection

Quantifying the Conceptual Error in Dimensionality Reduction

no code implementations12 Jun 2021 Tom Hanika, Johannes Hirth

Dimension reduction of data sets is a standard problem in the realm of machine learning and knowledge reasoning.

Decision Making Dimensionality Reduction

Exploring Scale-Measures of Data Sets

no code implementations4 Feb 2021 Tom Hanika, Johannes Hirth

Measurement is a fundamental building block of numerous scientific models and their creation.

Attribute

On the Lattice of Conceptual Measurements

no code implementations9 Dec 2020 Tom Hanika, Johannes Hirth

We present a novel approach for data set scaling based on scale-measures from formal concept analysis, i. e., continuous maps between closure systems, and derive a canonical representation.

Knowledge Cores in Large Formal Contexts

no code implementations26 Feb 2020 Tom Hanika, Johannes Hirth

Knowledge computation tasks are often infeasible for large data sets.

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