# Dr Dimitrios Kartsaklis

**Postdoctoral Research Assistant**

#### Research Interests

- Category-theoretic compositional models of natural language
- Natural language semantics
- Mathematics of language
- Machine learning-Deep learning for NLP
- Categorical Quantum Mechanics
- Machine translation

__Biography__

I am a Greek computer scientist and computational linguist. I have completed my DPhil at the Quantum Group of the University of Oxford, where my research was focused on category-theoretic compositional models of natural language (thesis title: *"Compositional Distributional Semantics with Compact Closed Categories and Frobenius Algebras"*). I also hold an MSc in Artificial Intelligence from the University of Edinburgh. In the past I have worked as software engineer and system analyst for more than 15 years. At the same time I am an experienced technical translator/writer having many collaborations with the Greek academia and top publications such as *Scientific American* (Greek Edition). Other scientific interests include: distributional models of semantics; pregroup and categorial grammars; category theory; machine learning/deep learning (especially in relation to composition); machine translation and translation technologies; interactive MT and practical applications of MT; wide-coverage statistical parsing; quantum computing

__Groups__

__Collaborators__

For the recent years I mainly work with Mehrnoosh Sadrzadeh; I also collaborate with Bob Coecke, Matt Purver, Martha Lewis and Jianpeng Cheng.

__Projects__

- AFOSR: Algorithmic and Logical Aspects when Computing Meanings
- EPSRC: Compositional Distributional Models of Meaning

__Resources__

For datasets, code, word embeddings and other resources related to my work, please see the resource page of the CompLing Lab.

__Activities__

- 10th Feb 2017: Invited talk at the
*Oxford Advanced Seminar on Informatic Structures*(OASIS) of the University of Oxford, "Linear and Non-linear Models of Natural Language Semantics" - August 2016: Invited talk at the
*Workshop on Tensors, their Decomposition and Applications*(QMUL) on "Tensor-based Models of Natural Language Meaning" - July 2016: Talk at the
*Workshop of Statistical and Logical Models of Meaning*(NASSLLI 2016, Rutgers University), "A Coordination Account for the DisCo Model" - June 2016: Talk at the
*Workshop on Semantic Spaces at the Intersection of NLP, Physics and Cognitive Science*(Strathclyde University, Glasgow), "Coordination for Categorical Compositional Distributional Semantics" - June 2015: Invited talk at the EECS
*Theory Group Seminar*(QMUL), "Open System Categorical Quantum Semantics in Natural Language Processing" - May 2015: Invited talk at the
*NLIP seminar*, University of Cambridge, "Open System Categorical Quantum Semantics in Natural Language Processing" - March 2015: Invited talk at the
*Computational Linguistics MSc course*of the University of Oxford, "Compositional Distributional Models of Meaning"

__Organization__

- I co-organize (with M. Lewis) a one-week ESSLLI 2017 course with title "Introduction to Categorical Compositional Distributional Semantics", more info can be found here.
- I co-organize (with M. Sadrzadeh and M. Purver) the 15th Meeting on Mathematics of Language (MoL) which will be held in QMUL the summer of 2017. The Call for Papers, as well as Latex styles, can be found here.
- I organized (with M. Sadrzadeh) a tutorial on "Compositional Distributional Models of Meaning" at COLING 2016 (Osaka, Japan). More information can be found here.
- I co-organized (with M. Lewis and L. Rimell) the workshop on "Semantic Spaces at the Intersection of NLP, Physics and Cognitive Science", which was co-located with QPL 2016 and took place on 11 June 2016, Glasgow, Scotland.
- I organised the NLP seminar series of the Computational Linguistics Lab for the academic year 2015-2016.
- I organised the meetings for the AFOSR project on "Algorithmic and Logical Aspects when Computing Meaning", which was shared between QMUL and the University of Oxford.

__Media__

*Algebra bridges syntax and meaning in natural language*(technology.org, July 29, 2014)*Entanglement in quantum phenomena and natural language*(technology.org, May 21, 2014)

__Selected publications__

(For a full list please see my academia.edu profile)

*Distributional Inclusion Hypothesis for Tensor-based Composition.*D. Kartsaklis, M. Sadrzadeh. COLING 2016 (pdf)*A Compositional Distributional Inclusion Hypothesis.*D. Kartsaklis, M. Sadrzadeh. Conference on the Logical Aspects of Computational Linguistics, 2016 (pdf)*Coordination in Categorical Compositional Distributional Semantics.*D. Kartsaklis. Workshop on Semantic Spaces at the Intersection of NLP, Physics and Cognitive Science (co-located with QPL-2016), 2016 (pdf, bibtex)*A Coordination Account for the DisCo Model*. NASSLLI Workshop on Statistical and Logical Models of Meaning, 2016 (pdf)*Sentence Entailment in Compositional Distributional Semantics.*E. Balkir, D. Kartsaklis, M. Sadrzadeh. International Symposium on Artificial Intelligence and Mathematics (ISAIM), 2016 (pdf)*Syntax-Aware Multi-Sense Word Embeddings for Deep Compositional Models of Meaning.*J. Cheng and D. Kartsaklis. Conference on Empirical Methods in Natural Language Processing (EMNLP), 2015 (pdf, bibtex)*A Frobenius Model of Information Structure in Categorical Compositional Distributional Semantics.*D. Kartsaklis, M. Sadrzadeh. 14th Meeting on the Mathematics of Language (MoL), 2015 (pdf, bibtex)*Open System Categorical Quantum Semantics in Natural Language Processing.**Evaluating Neural Word Representations in Tensor-Based Compositional Settings.*D. Milajevs, D. Kartsaklis, M. Sadrzadeh, M. Purver. Proceedings of EMNLP 2014 (pdf, bibtex)*A Study of Entanglement in a Categorical Framework of Natural Language.*D. Kartsaklis, M. Sadrzadeh. In Proceedings of the 11th Workshop of Quantum Physics and Logic (QPL 2014), EPTCS 172. 2014 (pdf, bibtex)*Resolving Lexical Ambiguity in Tensor Regression Models of Meaning.*D. Kartsaklis, N. Kalchbrenner, M. Sadrzadeh. In Proceedings of the 52nd Annual Meeting of the Association of Computational Linguistics (ACL 2014). 2014 (pdf, bibtex)*Compositional Operators in Distributional Semantics.*D. Kartsaklis. Springer Science Reviews, 2014 (pdf, bibtext)*Prior Disambiguation of Word Tensors for Constructing Sentence Vectors.*D. Kartsaklis, M. Sadrzadeh. In Proceedings of the 2013 Conference on Empirical Methods in Natural Language Processing (EMNLP 2013), 2013. (pdf, bibtex)*Reasoning about Meaning in Natural Language with Compact Closed Categories and Frobenius Algebras*, D. Kartsaklis, M. Sadrzadeh, S. Pulman, B. Coecke. In Logic and Algebraic Structures in Quantum Computing and Information (pdf)*A Unified Sentence Space for Categorical Distributional-Compositional Semantics: Theory and Experiments*, D. Kartsaklis, M. Sadrzadeh, S. Pulman. In Proceedings of COLING 2012, 2012 (pdf, bibtex)