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Staff photo Henrik Björklund

Henrik Björklund

I work on methods for detecting and mitigating bias in language processing systems, such as, e.g., ChatGPT, and also with foundational research on formal languages.

Research qualifications: Docent

Contact

E-mail
henrik.bjorklund@umu.se
Phone
+46 90 786 97 89

Works at

Affiliation
Associate professor at Department of Computing Science
Location
MIT-huset, Umeå universitet, MIT.C.440 Umeå universitet, 901 87 Umeå
Parsing unranked tree languages, folded once
Algorithms, MDPI 2024, Vol. 17, (6)
Berglund, Martin; Björklund, Henrik; Björklund, Johanna
Tree-based generation of restricted graph languages
International Journal of Foundations of Computer Science, World Scientific 2024, Vol. 35, (1 & 2) : 215-243
Björklund, Henrik; Björklund, Johanna; Ericson, Petter
We don’t talk about that: case studies on intersectional analysis of social bias in large language models
Proceedings of the 5th workshop on gender bias in natural language processing (GeBNLP), Association for Computational Linguistics 2024 : 33-44
Devinney, Hannah; Björklund, Jenny; Björklund, Henrik
Parsing unranked tree languages, folded once
Fundamentals of computation theory: 24th International Symposium, FCT 2023, Trier, Germany, September 18–21, 2023, Proceedings, Springer Nature 2023 : 60-73
Berglund, Martin; Björklund, Henrik; Björklund, Johanna
Transduction from trees to graphs through folding
Information and Computation, Elsevier 2023, Vol. 295
Berglund, Martin; Björklund, Henrik; Björklund, Johanna; et al.
Computer, enhence: POS-tagging improvements for nonbinary pronoun use in Swedish
Proceedings of the third workshop on language technology for equality, diversity, inclusion, The Association for Computational Linguistics 2023 : 54-61
Björklund, Henrik; Devinney, Hannah
Improving Swedish part-of-speech tagging for hen
Swedish Language Technology Conference 2022, Stockholm, Sweden, November 23-25, 2022
Björklund, Henrik; Devinney, Hannah
Theories of gender in natural language processing
Proceedings of the fifth annual ACM Conference on Fairness, Accountability, and Transparency (ACM FAccT'22), Association for Computing Machinery (ACM) 2022 : 2083-2102
Devinney, Hannah; Björklund, Jenny; Björklund, Henrik
Uniform Parsing for Hyperedge Replacement Grammars
Journal of computer and system sciences (Print), Elsevier 2021, Vol. 118 : 1-27
Björklund, Henrik; Drewes, Frank; Ericson, Petter; et al.
Semi-Supervised Topic Modeling for Gender Bias Discovery in English and Swedish
Proceedings of the Second Workshop on Gender Bias in Natural Language Processing, Association for Computational Linguistics 2020 : 79-92
Devinney, Hannah; Björklund, Jenny; Björklund, Henrik
Crime and Relationship: Exploring Gender Bias in NLP Corpora
SLTC 2020 – The Eighth Swedish Language Technology Conference, 25–27 November 2020, Online
Devinney, Hannah; Björklund, Jenny; Björklund, Henrik
Parsing Weighted Order-Preserving Hyperedge Replacement Grammars
Proceedings of the 16th Meeting on the Mathematics of Language, Association for Computational Linguistics 2019 : 1-11
Björklund, Henrik; Drewes, Frank; Ericson, Petter
Minimisation and Characterisation of Order-Preserving DAG Grammars
Report / UMINF, 18.15
Björklund, Henrik; Björklund, Johanna; Ericson, Petter
Parsing Weighted Order-Preserving Hyperedge Replacement Grammars
Report / UMINF, 18.16
Björklund, Henrik; Drewes, Frank; Ericson, Petter
Uniform Parsing for Hyperedge Replacement Grammars
Report / UMINF, 18.13
Björklund, Henrik; Drewes, Frank; Ericson, Petter; et al.
Conjunctive query containment over trees using schema information
Acta Informatica, SPRINGER 2018, Vol. 55, (1) : 17-56
Björklund, Henrik; Martens, Wim; Schwentick, Thomas
Single-Rooted DAGs in Regular DAG Languages: Parikh Image and Path Languages
Proceedings of the 13th International Workshop on Tree Adjoining Grammars and Related Formalisms (TAG+13), Association for Computational Linguistics 2017 : 94-101
Berglund, Martin; Björklund, Henrik; Drewes, Frank
On the Regularity and Learnability of Ordered DAG Languages
Implementation and Application of Automata: 22nd International Conference, CIAA 2017, Marne-la-Vallée, France, June 27-30, 2017, Proceedings, Cham: 2017 : 27-39
Björklund, Henrik; Björklund, Johanna; Ericson, Petter
Predicting User Competence from Linguistic Data
Proceedings of the 14th International Conference on Natural Language Processing (ICON-2017), Jadavpur University 2017 : 476-484
Woldemariam, Yonas Demeke; Bensch, Suna; Björklund, Henrik
Uniform vs. Nonuniform Membership for Mildly Context-Sensitive Languages: A Brief Survey
Algorithms, MDPI 2016, Vol. 9, (2)
Björklund, Henrik; Berglund, Martin; Petter, Ericson
Implementing a speech-to-text pipeline on the MICO platform
Report / UMINF, 16.07
Björklund, Henrik; Björklund, Johanna; Dahlgren, Adam; et al.
Between a Rock and a Hard Place: Parsing for Hyperege Replacement DAG Grammars
Proc. 10th International Conference on Language and Automata Theory and Applications (LATA 2016), Springer Publishing Company 2016 : 521-532
Björklund, Henrik; Drewes, Frank; Ericson, Petter
Class-memory automata revisited
Claudio Moraga: a passion for multi-valued logic and soft computing, Springer 2016 : 201-215
Björklund, Henrik; Schwentick, Thomas
Efficient incremental evaluation of succinct regular expressions
Proceedings of the 24th ACM International on Conference on Information and Knowledge Management, Association for Computing Machinery (ACM) 2015 : 1541-1550
Björklund, Henrik; Martens, Wim; Timm, Thomas
Characterizing Non-Regularity
Report / UMINF, 14.12
Berglund, Martin
Compression of finite-state automata through failure transitions
Theoretical Computer Science, Elsevier 2014, Vol. 557 : 87-100
Björklund, Henrik; Björklund, Johanna; Zechner, Niklas
Shuffled languages: representation and recognition
Theoretical Computer Science, Elsevier 2013, Vol. 489-490 : 1-20
Berglund, Martin; Björklund, Henrik; Björklund, Johanna
On the Parameterized Complexity of Linear Context-Free Rewriting Systems
Proceedings of the 13th Meeting on the Mathematics of Language (MoL 13), Association for Computational Linguistics 2013 : 21-29
Berglund, Martin; Björklund, Henrik; Drewes, Frank
Cuts in Regular Expressions
Developments in Language Theory: 17th International Conference, DLT 2013, Marne-la-Vallée, France, June 18-21, 2013. Proceedings, Springer Berlin/Heidelberg 2013 : 70-81
Berglund, Martin; Björklund, Henrik; Drewes, Frank; et al.
A note on the complexity of deterministic tree-walking transducers
Non-Classical Models of Automata and Applications (NCMA 2013)
Björklund, Henrik; Ericson, Petter
Validity of Tree Pattern Queries with Respect to Schema Information
Mathematical Foundations of Computer Science 2013: 38th International Symposium, MFCS 2013, Klosterneuburg, Austria, August 26-30, 2013. Proceedings, Springer: Springer Berlin/Heidelberg 2013 : 171-182
Björklund, Henrik; Martens, Wim; Schwentick, Thomas
On optimum left-to-right strategies for active context-free games
ICDT '13 Proceedings of the 16th International Conference on Database Theory, ACM Press 2013 : 105-116
Björklund, Henrik; Schuster, Martin; Schwentick, Thomas; et al.
The tractability frontier for NFA minimization
Journal of computer and system sciences (Print), Elsevier 2012, Vol. 78, (1) : 198-210
Björklund, Henrik; Martens, Wim
Recognizing Shuffled Languages
Report / UMINF, 11.01
Berglund, Martin; Björklund, Henrik; Högberg, Johanna
Recognizing shuffled languages
Language and Automata Theory and Applications: 5th International Conference, LATA 2011, Tarragona, Spain, May 26-31, 2011. Proceedings, Springer Berlin/Heidelberg 2011 : 142-154
Berglund, Martin; Björklund, Henrik; Högberg, Johanna
Conjunctive query containment over trees
Journal of computer and system sciences (Print), Vol. 77, (3) : 450-472
Björklund, Henrik; Martens, Wim; Schwentick, Thomas
Algorithmic properties of Millstream systems
Developments in Language Theory: 14th International Conference, DLT 2010, Springer Berlin/Heidelberg 2010 : 54-65
Bensch, Suna; Björklund, Henrik; Drewes, Frank
Incremental XPath evaluation
ACM Transactions on Database Systems, Vol. 35, (4:29) : 42-
Björklund, Henrik; Gelade, Wouter; Martens, Wim
Logik und Automaten : Ein echtes Dreamteam: [Logic and automatons : A real dream team]
Informatik-Spektrum, Springer 2010, Vol. 33, (5) : 452-461
Björklund, Henrik; Martens, Wim; Schweikardt, Nicole; et al.
On notions of regularity for data languages
Theoretical Computer Science, Vol. 411, (4-5) : 702-715
Björklund, Henrik; Schwentick, Thomas
Incremental XPath Evaluation
Proceedings of the 12th international conference on database theory: March 23-25, 2009, Saint Petersbourgh, Russia : 162-173
Björklund, Henrik; Gelade, Wouter; Marquardt, Marcel; et al.
View publications in DiVA

Research groups

Head of research
Foundations of Language Processing

Research projects

12 October 2012 until 6 February 2020
Parameterized Natural Language Parsing
Published: 24 Sep, 2020