669 research outputs found
Dagstuhl News January - December 2001
"Dagstuhl News" is a publication edited especially for the members of the Foundation "Informatikzentrum Schloss Dagstuhl" to thank them for their support. The News give a summary of the scientific work being done in Dagstuhl. Each Dagstuhl Seminar is presented by a small abstract describing the contents and scientific highlights of the seminar as well as the perspectives or challenges of the research topic
Dagstuhl News January - December 2000
"Dagstuhl News" is a publication edited especially for the members of the Foundation "Informatikzentrum Schloss Dagstuhl" to thank them for their support. The News give a summary of the scientific work being done in Dagstuhl. Each Dagstuhl Seminar is presented by a small abstract describing the contents and scientific highlights of the seminar as well as the perspectives or challenges of the research topic
Abstract State Machines 1988-1998: Commented ASM Bibliography
An annotated bibliography of papers which deal with or use Abstract State
Machines (ASMs), as of January 1998.Comment: Also maintained as a BibTeX file at http://www.eecs.umich.edu/gasm
07212 Abstracts Collection -- Constraint Databases, Geometric Elimination ang Geographic Information Systems
From 20.05. to 25.05., the Dagstuhl Seminar 07212 ``Constraint Databases, Geometric Elimination and Geographic Information Systems\u27\u27 was held
in the International Conference and Research Center (IBFI),
Schloss Dagstuhl.
During the seminar, several participants presented their current
research, and ongoing work and open problems were discussed. Abstracts of
the presentations given during the seminar as well as abstracts of
seminar results and ideas are put together in this paper. The first section
describes the seminar topics and goals in general.
Links to extended abstracts or full papers are provided, if available
07181 Abstracts Collection -- Parallel Universes and Local Patterns
From 1 May 2007 to 4 May 2007 the Dagstuhl Seminar 07181 ``Parallel
Universes and Local Patterns\u27\u27
was held in the International Conference and Research Center (IBFI),
Schloss Dagstuhl. During the seminar, several participants
presented their current research, and ongoing work and open problems
were discussed. Abstracts of the presentations given during the
seminar as well as abstracts of seminar results and ideas are put
together in this paper. The first section describes the seminar
topics and goals in general. Links to extended abstracts or full
papers are provided, if available
The Creeping Virtuality of Place
Places are inherently dynamic. They also mediate between entities and events of significance to us, and space. They reflect a network of associations, involving landmarks deemed salient for various reasons. These are all properties assigned to a place by a speaker, and may or may not correspond to the properties assigned to a place by any other speaker. As a result, places have a subjective quality. These properties of dynamicity and subjectivity present interesting challenges when producing mashups that align different
data sources. I propose addressing this by assuming that entities, following Hornsby & Egenhofer (2000), have histories, namely sequences of time intervals when they are predicated to exist. Places are entities with spatial properties that include topological relationships to other places, represented in terms of RCC-8 or the 9-intersection calculus, as well as distance and orientation
relations. This spatio-temporal integration can avail of existing annotation schemes for space and time in natural language, but it leaves some open issues related to the representation of subjectivity
Experiences with Some Benchmarks for Deductive Databases and Implementations of Bottom-Up Evaluation
OpenRuleBench is a large benchmark suite for rule engines, which includes
deductive databases. We previously proposed a translation of Datalog to C++
based on a method that "pushes" derived tuples immediately to places where they
are used. In this paper, we report performance results of various
implementation variants of this method compared to XSB, YAP and DLV. We study
only a fraction of the OpenRuleBench problems, but we give a quite detailed
analysis of each such task and the factors which influence performance. The
results not only show the potential of our method and implementation approach,
but could be valuable for anybody implementing systems which should be able to
execute tasks of the discussed types.Comment: In Proceedings WLP'15/'16/WFLP'16, arXiv:1701.0014
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