General Terms Design, Experimentation, Languages (2009)
Christian Mathis, Andreas M. Weiner, Theo Härder, Caesar Ralf
XTCcmp, the XQuery Compiler of a native XML database
T.: A Query Processing Approach for XML Database Systems (2008)
Abstract: Besides the storage engine, the query processor of a database system is the most critical component when it comes to performance and scalability. Research on query processing for relational...
Christian Mathis, Anfragesprache Xpath, Christian Mathis, Ag Datenbanken
öffnet. Bei genauerer Betrachtung verpasst es NAL jedoch, bekannte und vielversprechende Auswertungsalgorithmen, wie zum Beispiel den ” Holistic Twig Join“, in den Übersetzungsprozess...
Rousseaux, Germain, Mathis, Christian, Maissa, Philippe, Philbin, Thomas G., Leonhardt, Ulf
The conversion of positive-frequency waves into negative-frequency waves at the event horizon is the mechanism at the heart of the Hawking radiation of black holes. In black-hole analogues, horizons...
Integrating Structural Joins into a TupleBased XPath Algebra (2007)
Abstract: Over the recent years, very little effort has been made to give XPath a proper algebraic treatment. The only laudable exception is the Natix Algebra (NAL) which defines the translation of...
Destabilization of a Viscous Film Flowing Down in the Form of a Vertical Cylindrical Curtain (2006)
Pirat, Christophe, Mathis, Christian, Mishra, Manoranjan, Maissa, Philippe
In this Letter, we study experimentally a viscous liquid curtain in an annular geometry. Gap and median radius can be varied in such a way that the base of the initially stationary cylindrical...
M.: Locking-Aware Structural Join Operators for XML Query Processing (2006)
Christian Mathis, Theo Härder, Michael Haustein
As observed in many publications so far, the matching of twig pattern queries is a core operation in XML database management systems (XDBMSs) for which the structural join and the holistic twig join...
M.: Locking-Aware Structural Join Operators for XML Query Processing (2006)
Christian Mathis, Theo Härder, Michael Haustein
As observed in many publications so far, the matching of twig pattern queries is a core operation in XML database management systems (XDBMSs) for which the structural join and the holistic twig join...
T.: Hash-Based Structural Join Algorithms (2006)
Abstract. Algorithms for processing Structural Joins embody essential building blocks for XML query evaluation. Their design is a difficult task, because they have to satisfy many requirements, e....
DeweyIDs - The Key to Fine-Grained Management of XML Documents (2005)
Michael P. Haustein, Theo Härder, Christian Mathis, Markus Wagner
Because XML documents tend to be very large and are more and more collaboratively processed, their fine-grained storage and management is a must for which, in turn, a flexible tree representation is...
Transition to Spatiotemporal Chaos in a Two-Dimensional Hydrodynamic System (2005)
Pirat, Christophe, Naso, Aurore, Meunier, Jean-Louis, Maissa, Philippe, Mathis, Christian
We study the transition to spatiotemporal chaos in a two-dimensional hydrodynamic experiment where liquid columns take place in the gravity induced instability of a liquid film. The film is formed...
DeweyIDs—The Key to Fine-Grained Management of XML Documents (2005)
Michael P. Haustein, Theo Härder, Christian Mathis, Markus Wagner
Abstract. Because XML documents tend to be very large and are more and more collaboratively processed, their fine-grained storage and management is a must for which, in turn, a flexible tree...