Search Results for author: Alexander Mehler

Found 18 papers, 7 papers with code

Unleashing annotations with TextAnnotator: Multimedia, multi-perspective document views for ubiquitous annotation

no code implementations ACL (ISA, IWCS) 2021 Giuseppe Abrami, Alexander Henlein, Andy Lücking, Attila Kett, Pascal Adeberg, Alexander Mehler

We argue that mainly due to technical innovation in the landscape of annotation tools, a conceptual change in annotation models and processes is also on the horizon.

Iconic Gesture Semantics

no code implementations29 Apr 2024 Andy Lücking, Alexander Henlein, Alexander Mehler

Informational evaluation is spelled out as extended exemplification (extemplification) in terms of perceptual classification of a gesture's visual iconic model.

Syntactic Language Change in English and German: Metrics, Parsers, and Convergences

1 code implementation18 Feb 2024 Yanran Chen, Wei Zhao, Anne Breitbarth, Manuel Stoeckel, Alexander Mehler, Steffen Eger

Even though we have evidence that recent parsers trained on modern treebanks are not heavily affected by data 'noise' such as spelling changes and OCR errors in our historic data, we find that results of syntactic language change are sensitive to the parsers involved, which is a caution against using a single parser for evaluating syntactic language change as done in previous work.

Optical Character Recognition (OCR) Sentence

German Parliamentary Corpus (GerParCor)

2 code implementations LREC 2022 Giuseppe Abrami, Mevlüt Bagci, Leon Hammerla, Alexander Mehler

Parliamentary debates represent a large and partly unexploited treasure trove of publicly accessible texts.

Optical Character Recognition (OCR)

I still have Time(s): Extending HeidelTime for German Texts

1 code implementation LREC 2022 Andy Lücking, Manuel Stoeckel, Giuseppe Abrami, Alexander Mehler

HeidelTime is one of the most widespread and successful tools for detecting temporal expressions in texts.

What do Toothbrushes do in the Kitchen? How Transformers Think our World is Structured

no code implementations NAACL 2022 Alexander Henlein, Alexander Mehler

In this paper we utilize this research on biases to investigate to what extent transformer-based language models allow for extracting knowledge about object relations (X occurs in Y; X consists of Z; action A involves using X).

Multiple Texts as a Limiting Factor in Online Learning: Quantifying (Dis-)similarities of Knowledge Networks across Languages

1 code implementation5 Aug 2020 Alexander Mehler, Wahed Hemati, Pascal Welke, Maxim Konca, Tolga Uslu

From the perspective of educational science, the article develops a computational model of the information landscape from which multiple texts are drawn as typical input of web-based reading.

Computational linguistic assessment of textbook and online learning media by means of threshold concepts in business education

no code implementations5 Aug 2020 Andy Lücking, Sebastian Brückner, Giuseppe Abrami, Tolga Uslu, Alexander Mehler

The two main findings can be summarized as follows: Firstly, the three kinds of resources can indeed be distinguished in terms of their threshold concepts' profiles.

The Frankfurt Latin Lexicon: From Morphological Expansion and Word Embeddings to SemioGraphs

1 code implementation21 May 2020 Alexander Mehler, Bernhard Jussen, Tim Geelhaar, Alexander Henlein, Giuseppe Abrami, Daniel Baumartz, Tolga Uslu, Wahed Hemati

In this article we present the Frankfurt Latin Lexicon (FLL), a lexical resource for Medieval Latin that is used both for the lemmatization of Latin texts and for the post-editing of lemmatizations.

Lemmatization Word Embeddings

From Topic Networks to Distributed Cognitive Maps: Zipfian Topic Universes in the Area of Volunteered Geographic Information

no code implementations4 Feb 2020 Alexander Mehler, Rüdiger Gleim, Regina Gaitsch, Wahed Hemati, Tolga Uslu

To this end, we explore Volunteered Geographic Information (VGI) to model texts addressing places at the level of cities or regions with the help of so-called topic networks.

When Specialization Helps: Using Pooled Contextualized Embeddings to Detect Chemical and Biomedical Entities in Spanish

no code implementations WS 2019 Manuel Stoeckel, Wahed Hemati, Alexander Mehler

The recognition of pharmacological substances, compounds and proteins is an essential preliminary work for the recognition of relations between chemicals and other biomedically relevant units.

Word Embeddings

SenseFitting: Sense Level Semantic Specialization of Word Embeddings for Word Sense Disambiguation

no code implementations30 Jul 2019 Manuel Stoeckel, Sajawel Ahmed, Alexander Mehler

We outperform knowledge-based WSD methods by up to 25% F1-score and produce a new state-of-the-art on the German sense-annotated dataset WebCAGe.

LEMMA Word Embeddings +1

Resource-Size matters: Improving Neural Named Entity Recognition with Optimized Large Corpora

1 code implementation26 Jul 2018 Sajawel Ahmed, Alexander Mehler

This study improves the performance of neural named entity recognition by a margin of up to 11% in F-score on the example of a low-resource language like German, thereby outperforming existing baselines and establishing a new state-of-the-art on each single open-source dataset.

Lemmatization named-entity-recognition +4

Complex Decomposition of the Negative Distance kernel

no code implementations5 Jan 2016 Tim vor der Brück, Steffen Eger, Alexander Mehler

Our evaluation shows that the power kernel produces F-scores that are comparable to the reference kernels, but is -- except for the linear kernel -- faster to compute.

Document Classification General Classification +2

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