Henning Christiansen

PhD, Professor of Computer Science at Roskilde University, Denmark
Leader of the research group PLIS: Programming, Logic and Intelligent Systems
Department of Communication, Business and Information Technologies
e-mail: henning@ruc.dk


IMPORTANT Information for Erasmus and guest students coming to Roskilde Autumn 2015 and Spring 2015, including lists of courses.
Expected application deadlines are Erasmus: May 1, 2015, resp. October 1, 2015; Guests: May 15, 2015 and November 1, 2015.
IMPORTANT Erasmus students from Roskilde wanting to go out Autumn 2015 and Spring 2016.
Application deadline is February 15, 2015 (sic!); next opertunity for "remaining seats" for spring 2016 will be mid September 2016.

Research interests

Logic & constraint logic programming (abduction, metaprogramming, Constraint Handling Rules...), Probabilistic-logic models (including for biological sequence ananlysis), CHR Grammars and aspects of Natural Language Processing; Logic aspects of databases; Logical methods for context comprehension; Intelligent query systems (database, knowledge representation, ...); Computer science teaching. Interactive Installations.
See viskbook.com and ItalianDrawings.ruc.dk.

Responsible for these previous LoSt and CONTROL research projects. Member of ALP (Association for Logic Programming), EATCS (European Association for Theoretical Computer Science), FoLLi (European Association for Logic, Language and Information).

News: Proceedings and link to websites for all CSLP workshops

Former Ph.D. students: Christian Theil Have, Ole Torp Lassen, Davide Martinenghi, Niels Jørgensen

Conferences and workshops:
Organization, coming conferences CONTEXT 2015 (Program Co-chair; general chair), CSLP 2015 (General chair; program co-chair), FQAS 2015 (Member of steering comm., etc.), ICART 2015, special session PUaNLP 2015 (Co-chair)
Organization, previous: ISMIS 2014 (Program co-chair), CONTEXT 2013 (member of "Chairs of the Community of Context"; just a funny name for steering committee), CHR 2013 (program co-chair), FQAS 2013 (member of steering comm.), CSLP 2012 (deeply involved), CSLP 2011 (co-organizer), CONTEXT 2011 (general co-chair), FQAS 2011 (general and program co-chair, member of steering comm.), WEB AS A STREAM: special session at FQAS 2009 (co-organizer), LID 2009 (program co-chair; member of steering committee), LID 2008 (member of steering committee), CSLP 2008 (co-organizer and program co-chair), CONTEXT 07 (Organizing chair), CSLP@Context07 (co-organizer), CSLP 2006 (co-organizer), LAAIC 2006 (workshop & prog. co-chair), CSLP 2005 (general chair), LAAIC 2005 (workshop chair), CSLP 2004 (general chair), FQAS 2004 (co-chair) - see photos, FQAS 2002 (conf. co-chair), ICLP'02 (conference chair), FQAS'98 (general chair), NWPER'86 (general chair).
Current program committees: . . .
Other recent committees: CHR 2014 SCAI 2013, DEXA 2013, LDSSB'12, CHR 2012, ARCOE-12, DEXA 2012, LOPSTR 2012, PADL 2012 MRC 2011, CHR 2011, ICLP 2011, ICDM 2011, SCAI 2011, DEXA 2011, DABU 2010, MRC 2010, DEXA 2010, CHR 2010, ICDM 2010, LAMAS 2010. FQAS 2009, CHR 2009, ICDM 2009, DEXA 2009, ForLing 2009, CICLOPS 2008, ForLing 2008, MRC 2008, ICDM 2008, DEXA 2008, SCAI 2008, ECEIS 2008, INAP 2007, DEXA 2007, CHR 2007, DEXA 2006, FQAS 2006, CHR 2006. CHR 2005, LACL 2005, W(C)LP 2005, WARP 2004, EUROFUSE 2004, KI-2004, FQAS2000 (see post conf. pictures), INAP2001.


Complete list of scientific papers, reports, and edited works.

Available textbooks

Logic programming as a framework for Knowledge Representation and Artificial Intelligence from 2006. A biased introduction to Prolog and CHR. Get it here.

Sprog og abstrakte maskiner (book in Danish; "Languages and Abstract Machines")
2012; reprint of textbook from 2000. It gives a gentle theoretical framework for the sort of formal languages that we use for instructing a computer, e.g., programming languages of different sorts, user interface languages, ..., treating their syntax, semantics and, to some extent, pragmatics. Different programming language paradigms are briefly introduced, Turing machines as well, and elementary methods for lexical and syntactic analysis, compilation and interpretation are introduced.
Freely avaliable for restricted purposes. If you want to store it on your server or print several copies, write to the author. Otherwise download it here: bog.pdf


Scientific Computing (autumn 2014; closed website).
Abduction and language processing with CHR at the CHR Summer School 2013; see website with examples and links.
Artificial Intelligence and Cognition in Interactive Systems (courses spring 2015, 2014, 2013, 2012; closed websites)
Databases (course autumn 2014, autumn+spring 2013, spring 2012, autumn+spring 2011, autumn+spring 2010, autumn 2009; closed websites)
Reasoning and language processing with Constraint Handling Rules, PhD course for FIRST Research School, 2010. (alternative link)
Logic Programming for Linguistics: A short introduction to Prolog, and Logic Grammars with Constraints as an easy way to Syntax and Semantics, (2010).
Abduction and language processing with CHR at the CHR Summer School 2010
ROBOT: Software architectures for robot programming (course spring 2009).
KIIS: Artificial intelligence and intelligent systems (course autumn 2008).
KIIS: Artificial intelligence and intelligent systems (course autumn 2007).
Tools and Concepts in Programming (course spring 2007).
KIIS: Artificial intelligence and intelligent systems (course autumn 2006).
PIP: Paradigms in Programming (course spring 2006).
KIIS: Artificial intelligence and intelligent systems (course autumn 2005).
Course autumn 2004: Datalogi C: Data structures and Algorithms (course autumn 2004; in Danish).
Computational Linguistics (course spring 2004, in Danish)
Advanced Topics in Databases (course spring 2003).
Computer Science C: Data structures and Algorithms (course autumn 2003, in Danish).
Advanced topics in databases (course spring 2003).
Datalogi C: Data structures and Algorithms (course autumn 2002).
Databases (course autumn 2001, in Danish).
Language and logic (course spring 2001).

. . . before that, different courses in Computer Science, elementary programming, etc., at Roskilde, Aarhus and Aalborg Universities and a few other places.

Other, selected activities

Coordinator for Erasmus/Socrates student exchanges with a number of European countries; since 1990. More information: link and link.
Former head of Computer Science Section (until feb 2002) and (long time ago) head of Study Board.
Reviewer for research councils and organizations in Denmark, Sweden, Slovak Republic, Germany, canada, Switzerland. Former member of ERCIM Executive Committee and IT-Øresund (now a.k.a. Øresund IT Academy)
Member of evaluation committee for Swedish Computer Science Educations, 2000-2001, see Högskoleverket; find evaluation report here (in Swedish).

Available software

The DEMO system: A generic system for automatic reasoning based on a logically complete implementation of a proof predicate in Prolog. Examples provided with the system: abduction, induction, default logic, natural language analysis, diagnosis, etc.

CHR grammars: A grammar system based on Constraint Handling Rules. Applies constraint logic techniques for language processing in the shape of a grammar notation on top of CHR. Features: A simple treatment of ambiguity; abductive language interpretation without any extra machinery; an implementation of Assumption Grammars; full integration with Prolog and CHR.
NEW VERSION 1.1 AVAILABLE (July 19, 2011)

HYPROLOG: A logic programming language with assumption and induction

Sudoku: A little program in Prolog+CHR that solves Sudoku problems quickly.

Efficient viterbi for PRISM models with annotations: Extends the probabilistic-logic PRISM system developed by Sato, Kameya and Zhou with a facility to Viterbi predictions for models with annotations. In PRISM this otherwise requires a lot of hand-coding to make it run efficiently; here we do all that automatically.

Zoo of HMM subspecies: Example programs used in the paper "Taming the Zoo of Discrete HMM Subspecies & Some of their Relatives" (2011).
These programs run under PRISM system.

Roskilde University
Department of Communication, Business and Information Technologies, building 43.2
PO Box 260
DK-4000 Roskilde

Tel: (+45) 4674 3832

Last modification 2-dec-2014