Search Results for author: Tom Hanika

Found 35 papers, 5 papers with code

What is the $\textit{intrinsic}$ dimension of your binary data? -- and how to compute it quickly

no code implementations9 Apr 2024 Tom Hanika, Tobias Hille

Dimensionality is an important aspect for analyzing and understanding (high-dimensional) data.

A Repository for Formal Contexts

no code implementations5 Apr 2024 Tom Hanika, Robert Jäschke

However, the distribution of the data sets poses a problem for the sustainable development of the research field.

Reproducibility and Geometric Intrinsic Dimensionality: An Investigation on Graph Neural Network Research

no code implementations13 Mar 2024 Tobias Hille, Maximilian Stubbemann, Tom Hanika

Difficulties in replication and reproducibility of empirical evidences in machine learning research have become a prominent topic in recent years.

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

Towards Ordinal Data Science

no code implementations13 Jul 2023 Gerd Stumme, Dominik Dürrschnabel, Tom Hanika

One reason for this is the limited availability of computational resources in the last century that would have been required for ordinal computations.

Sociology

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.

Selecting Features by their Resilience to the Curse of Dimensionality

1 code implementation5 Apr 2023 Maximilian Stubbemann, Tobias Hille, Tom Hanika

Real-world datasets are often of high dimension and effected by the curse of dimensionality.

feature selection

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.

Discovering Locally Maximal Bipartite Subgraphs

1 code implementation18 Nov 2022 Dominik Dürrschnabel, Tom Hanika, Gerd Stumme

Induced bipartite subgraphs of maximal vertex cardinality are an essential concept for the analysis of graphs.

Intrinsic Dimension for Large-Scale Geometric Learning

1 code implementation11 Oct 2022 Maximilian Stubbemann, Tom Hanika, Friedrich Martin Schneider

In the present work, we derive a computationally feasible method for determining said axiomatic ID functions.

Graph Learning

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

Mapping Research Trajectories

no code implementations25 Apr 2022 Bastian Schäfermeier, Gerd Stumme, Tom Hanika

Hence, we propose a principled approach for \emph{mapping research trajectories}, which is applicable to all kinds of scientific entities that can be represented by sets of published papers.

BIG-bench Machine Learning

Towards Explainable Scientific Venue Recommendations

no code implementations21 Sep 2021 Bastian Schäfermeier, Gerd Stumme, Tom Hanika

Selecting the best scientific venue (i. e., conference/journal) for the submission of a research article constitutes a multifaceted challenge.

Recommendation Systems Topic Models

Topological Indoor Mapping through WiFi Signals

no code implementations17 Jun 2021 Bastian Schaefermeier, Gerd Stumme, Tom Hanika

The ubiquitous presence of WiFi access points and mobile devices capable of measuring WiFi signal strengths allow for real-world applications in indoor localization and mapping.

Clustering Dimensionality Reduction +1

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.

FCA2VEC: Embedding Techniques for Formal Concept Analysis

no code implementations26 Nov 2019 Dominik Dürrschnabel, Tom Hanika, Maximilian Stubbemann

Embedding large and high dimensional data into low dimensional vector spaces is a necessary task to computationally cope with contemporary data sets.

Collaborative Interactive Learning -- A clarification of terms and a differentiation from other research fields

no code implementations16 May 2019 Tom Hanika, Marek Herde, Jochen Kuhn, Jan Marco Leimeister, Paul Lukowicz, Sarah Oeste-Reiß, Albrecht Schmidt, Bernhard Sick, Gerd Stumme, Sven Tomforde, Katharina Anna Zweig

The field of collaborative interactive learning (CIL) aims at developing and investigating the technological foundations for a new generation of smart systems that support humans in their everyday life.

Active Learning

DimDraw -- A novel tool for drawing concept lattices

no code implementations2 Mar 2019 Dominik Dürrschnabel, Tom Hanika, Gerd Stumme

Concept lattice drawings are an important tool to visualize complex relations in data in a simple manner to human readers.

Discovering Implicational Knowledge in Wikidata

no code implementations3 Feb 2019 Tom Hanika, Maximilian Marx, Gerd Stumme

Knowledge graphs have recently become the state-of-the-art tool for representing the diverse and complex knowledge of the world.

Knowledge Graphs

Relevant Attributes in Formal Contexts

no code implementations20 Dec 2018 Tom Hanika, Maren Koyda, Gerd Stumme

Computing conceptual structures, like formal concept lattices, is in the age of massive data sets a challenging task.

Attribute Attribute Extraction

Formal Context Generation using Dirichlet Distributions

no code implementations28 Sep 2018 Maximilian Felde, Tom Hanika

We suggest an improved way to randomly generate formal contexts based on Dirichlet distributions.

Distances for WiFi Based Topological Indoor Mapping

no code implementations19 Sep 2018 Bastian Schäfermeier, Tom Hanika, Gerd Stumme

For localization and mapping of indoor environments through WiFi signals, locations are often represented as likelihoods of the received signal strength indicator.

Density Estimation

Probably approximately correct learning of Horn envelopes from queries

no code implementations16 Jul 2018 Daniel Borchmann, Tom Hanika, Sergei Obiedkov

We propose an algorithm for learning the Horn envelope of an arbitrary domain using an expert, or an oracle, capable of answering certain types of queries about this domain.

Attribute

Intrinsic dimension and its application to association rules

no code implementations15 May 2018 Tom Hanika, Friedrich Martin Schneider, Gerd Stumme

This work summarizes the first attempt to provide a computationally feasible method for measuring the extent of dimension curse present in a data set with respect to a particular class machine of learning procedures.

feature selection

Intrinsic Dimension of Geometric Data Sets

no code implementations24 Jan 2018 Tom Hanika, Friedrich Martin Schneider, Gerd Stumme

The present work provides a comprehensive study of the intrinsic geometry of a data set, based on Gromov's metric measure geometry and Pestov's axiomatic approach to intrinsic dimension.

Towards Collaborative Conceptual Exploration

no code implementations23 Dec 2017 Tom Hanika, Jens Zumbrägel

Using notions from combinatorial design theory we further expand those insights as far as providing first results on the decidability problem if a given consortium is able to explore some target domain.

Attribute

On the Usability of Probably Approximately Correct Implication Bases

no code implementations4 Jan 2017 Daniel Borchmann, Tom Hanika, Sergei Obiedkov

We revisit the notion of probably approximately correct implication bases from the literature and present a first formulation in the language of formal concept analysis, with the goal to investigate whether such bases represent a suitable substitute for exact implication bases in practical use-cases.

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