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Johann Petrak

dblp:37/5468 · DBLP profile ↗
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9ranked-venue papers
0as first author
2since 2021 · last 2026
0000-0001-8038-3096ORCID · corroborated

Domains — the database's venue-derived domains; a paper can count in several

Artificial intelligence and machine learning · 5 · 2 since 2021Databases, data management, data science and information retrieval · 2Applied, interdisciplinary, general and emerging computing · 2Graphics, computer vision, multimedia, augmented reality and games · 1

Expertise — from the expertise taxonomy: the topics of the expert's papers under the CCF categories. A weight counts papers with recency: 1 for a paper about the topic, 0.3 when the topic is its context, halved every five years.

Artificial intelligence
1 paper
Information extraction and text analysis · 62% Deep learning architectures and training · 38%
Interdisciplinary, comprehensive, and emerging computing
1 paper
Bioinformatics and computational biology · 100%

Topics — the 3 heaviest of 4, each with the papers that count most for it

TopicWeightPapersLastEvidence papers
Natural language and speech › Information extraction and text analysis › text classification
sentence classification
0.312018
A Deep Neural Network Sentence Level Classification Method with Context Information · EMNLP 2018
Machine learning › Deep learning architectures and training
convolutional neural network
0.112018
A Deep Neural Network Sentence Level Classification Method with Context Information · EMNLP 2018
Machine learning › Deep learning architectures and training › recurrent neural network
LSTM
0.112018
A Deep Neural Network Sentence Level Classification Method with Context Information · EMNLP 2018

Methods — techniques the papers use, named apart from their topics

context modeling · 0.3LSTM · 0.3CNN · 0.3web-based search · 0.1
YearPublicationVenuePosition
2026 Ragability Benchmark: A Dataset and Library to Test LLMs on Inter-context Conflicts
Stephanie Gross, Johann Petrak, Brigitte Krenn
LREC2
2024 GERMS-AT: A Sexism/Misogyny Dataset of Forum Comments from an Austrian Online Newspaper
abstract
Brigitte Krenn, Johann Petrak, Marina Kubina, Christian Burger This paper presents a sexism/misogyny dataset extracted from comments of a large online forum of an Austrian newspaper. The comments are in Austrian German language, and in some cases interspersed with dialectal or English elements. We describe the data collection, the annotation guidelines and the annotation process resulting in a corpus of approximately 8 000 comments which were annotated with 5 levels of sexism/misogyny, ranging from 0 (not sexist/misogynist) to 4 (highly sexist/misogynist). The professional forum moderators (self-identified females and males) of the online newspaper were involved as experts in the creation of the annotation guidelines and the annotation of the user comments. In addition, we also describe first results of training transformer-based classification models for both binarized and original label classification of the corpus.
Brigitte Krenn, Johann Petrak, Marina Kubina, Christian Burger
LREC/COLING2
2018 A Deep Neural Network Sentence Level Classification Method with Context Information
abstract
In the sentence classification task, context formed from sentences adjacent to the sentence being classified can provide important information for classification.This context is, however, often ignored.Where methods do make use of context, only small amounts are considered, making it difficult to scale.We present a new method for sentence classification, Context-LSTM-CNN, that makes use of potentially large contexts.The method also utilizes long-range dependencies within the sentence being classified, using an LSTM, and short-span features, using a stacked CNN.Our experiments demonstrate that this approach consistently improves over previous methods on two different datasets.
Xingyi Song, Johann Petrak, Angus Roberts
EMNLP2
2015 Using @Twitter Conventions to Improve #LOD-Based Named Entity Disambiguation
Genevieve Gorrell, Johann Petrak, Kalina Bontcheva
ESWC2
2015 Analysis of named entity recognition and linking for tweets
Leon Derczynski, Diana Maynard, Giuseppe Rizzo 0002, Marieke van Erp, Genevieve Gorrell, Raphaël Troncy, Johann Petrak, Kalina Bontcheva
Inf. Process. Manag.7
2012 Applying Random Indexing to Structured Data to Find Contextually Similar Words
Danica Damljanovic, Udo Kruschwitz, M-Dyaa Albakour, Johann Petrak, Mihai Lupu
LREC4
2005 GPSDB: a new database for synonyms expansion of gene and protein names
abstract
UNLABELLED: We present a new database, GPSDB (Gene and Protein Synonyms DataBase) which collects gene/protein names, in a species specific way, from 14 main biological resources. A web-based search interface gives access to the database: given a gene/protein name, it retrieves all synonyms for this entity and queries Medline with a set of user-selected terms. AVAILABILITY: GPSDB is freely available from http://biomint.oefai.at/ CONTACT: [email protected].
Violaine Pillet, Marc Zehnder, Alexander K. Seewald, Anne-Lise Veuthey, Johann Petrak
Bioinform.5
2000 Searching for Patterns in Political Event Sequences: Experiments with the Keds Database
abstract
This paper presents an empirical study on the possibility of discovering interesting event sequences and sequential rules in a large database of international political events. A data mining algorithm first presented by Mannila and Toivonen (1996), has been implemented and extended, which is able to search for generalized episodes in such event databases. Experiments conducted with this algorithm on the Kansas Event Data System (KEDS) database, an event data set covering interactions between countries in the Persian Gulf region, are described. Some qualitative and quantitative results are reported, and experiences with strategies for reducing the problem complexity and focusing on the search on interesting subsets of events are described.
Klaus Kovar, Johannes Fürnkranz, Johann Petrak, Bernhard Pfahringer, Robert Trappl, Gerhard Widmer
Cybern. Syst.3
1996 Digging for Peace: Using Machine Learning Methods for Assessing International Conflict Databases
Robert Trappl, Johannes Fürnkranz, Johann Petrak
ECAI3