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110 results on '"Feinerer, Ingo"'

1. Lossless Selection Views under Conditional Domain Constraints

Author

Feinerer, Ingo, Franconi, Enrico, and Guagliardo, Paolo

Subjects
Computer Science - Databases
Abstract

A set of views defined by selection queries splits a database relation into sub-relations, each containing a subset of the original rows. This decomposition into horizontal fragments is lossless when the initial relation can be reconstructed from the fragments by union. In this paper, we consider horizontal decomposition in a setting where some of the attributes in the database schema are interpreted over a specific domain, on which a set of special predicates and functions is defined. We study losslessness in the presence of integrity constraints on the database schema. We consider the class of conditional domain constraints (CDCs), which restrict the values that the interpreted attributes may take whenever a certain condition holds on the non-interpreted ones, and investigate lossless horizontal decomposition under CDCs in isolation, as well as in combination with functional and unary inclusion dependencies., Comment: 16 pages, 1 figure, 1 table. Full version with complete proofs. Instead of this version, please cite http://dx.doi.org/10.1109/TKDE.2014.2334327

Published
2015
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2. Characterizing Regulatory Documents and Guidelines Based on Text Mining

Author

Winter, Karolin, Rinderle-Ma, Stefanie, Grossmann, Wilfried, Feinerer, Ingo, Ma, Zhendong, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Weikum, Gerhard, Series editor, Panetto, Hervé, editor, Debruyne, Christophe, editor, Gaaloul, Walid, editor, Papazoglou, Mike, editor, Paschke, Adrian, editor, Ardagna, Claudio Agostino, editor, and Meersman, Robert, editor

Published
2017
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6. UMAP: A Universal Layer for Schema Mapping Languages

Author

Chertes, Florin, Feinerer, Ingo, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Decker, Hendrik, editor, Lhotská, Lenka, editor, Link, Sebastian, editor, Basl, Josef, editor, and Tjoa, A Min, editor

Published
2013
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7. Lossless Horizontal Decomposition with Domain Constraints on Interpreted Attributes

Author

Feinerer, Ingo, Franconi, Enrico, Guagliardo, Paolo, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Gottlob, Georg, editor, Grasso, Giovanni, editor, Olteanu, Dan, editor, and Schallhart, Christian, editor

Published
2013
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8. Configuration Repair via Flow Networks

Author

Feinerer, Ingo, Niederbrucker, Gerhard, Salzer, Gernot, Sisel, Tanja, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Goebel, Randy, editor, Siekmann, Jörg, editor, Wahlster, Wolfgang, editor, Chen, Li, editor, Felfernig, Alexander, editor, Liu, Jiming, editor, and Raś, Zbigniew W., editor

Published
2012
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9. Reducing Multiplicities in Class Diagrams

Author

Feinerer, Ingo, Salzer, Gernot, Sisel, Tanja, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, Whittle, Jon, editor, Clark, Tony, editor, and Kühne, Thomas, editor

Published
2011
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12. Analysis and Algorithms for Stemming Inversion

Author

Feinerer, Ingo, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, Cheng, Pu-Jen, editor, Kan, Min-Yen, editor, Lam, Wai, editor, and Nakov, Preslav, editor

Published
2010
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27. Computing product configurations via UML and integer linear programming

Author

Falkner, Andreas, Feinerer, Ingo, Salzer, Gernot, and Schenner, Gottfried

Subjects
Algorithms -- Usage, UML (Unified modeling language) -- Usage, Algorithm, Engineering and manufacturing industries
Abstract

Byline: Andreas Falkner, Ingo Feinerer, Gernot Salzer, Gottfried Schenner The Unified Modelling Language (UML) can be used to specify complex systems: component types are modelled as classes, interdependencies as associations with multiplicities and labels. This paper describes how to handle constraints on associations and multiplicities declaratively by translating them to inequalities over integers without adding complexity. This method provides well-defined semantics and allows for efficient algorithms for reasoning tasks like detecting inconsistencies. We identify some challenges arising from the use of class diagrams for product configuration, and propose solutions for some of them. The paper concludes with the discussion of an example derived from a real-world configuration problem in the railway domain.

Published
2010

29. Combining Weighted Centrality and Network Clustering

Author

Bohn, Angela, Theußl, Stefan, Feinerer, Ingo, Hornik, Kurt, Mair, Patrick, and Walchhofer, Norbert

Subjects
social network analysis / centrality measure / closeness / clustering / R-help
Abstract

In Social Network Analysis (SNA) centrality measures focus on activity (degree), information access (betweenness), distance to all the nodes (closeness), or popularity (pagerank). We introduce a new measure quantifying the distance of nodes to the network center. It is called weighted distance to nearest center (WDNC) and it is based on edge-weighted closeness (EWC), a weighted version of closeness. It combines elements of weighted centrality as well as clustering. The WDNC will be tested on two e-mail networks of the R community, one of the most important open source programs for statistical computing and graphics. We will find that there is a relationship between the WDNC and the formal organization of the R community., Series: Research Report Series / Department of Statistics and Mathematics

Published
2009

30. An Approach to Incorporate Texts into a Social Network Analysis of Communication Graphs

Author

Bohn, Angela, Feinerer, Ingo, Hornik, Kurt, and Mair, Patrick

Subjects
social network analysis / text mining / R-help / R-devel / mailing list
Abstract

Social network analysis (SNA) provides tools to examine relationships between people. Text mining (TM) allows capturing the text they produce in Web 2.0 applications, for example, however it neglects their social structure. This paper applies an approach to combine the two methods named "content-based SNA" (CB-SNA). Using the R mailing lists, R-help and R-devel, we show how this combination can be used to describe people's interests and to find out if authors who have similar interests actually communicate. We find that the expected positive relationship between sharing interests and communicating gets stronger as the centrality scores of authors in the communication networks increase., Series: Research Report Series / Department of Statistics and Mathematics

Published
2009

31. A text mining framework in R and its applications

Author

Feinerer, Ingo

Subjects
RVK ST 304, ST 600, +%2F+framework+%2F+infrastructure%22">text mining / R / framework / infrastructure
Abstract

Text mining has become an established discipline both in research as in business intelligence. However, many existing text mining toolkits lack easy extensibility and provide only poor support for interacting with statistical computing environments. Therefore we propose a text mining framework for the statistical computing environment R which provides intelligent methods for corpora handling, meta data management, preprocessing, operations on documents, and data export. We present how well established text mining techniques can be applied in our framework and show how common text mining tasks can be performed utilizing our infrastructure. The second part in this thesis is dedicated to a set of realistic applications using our framework. The first application deals with the implementation of a sophisticated mailing list analysis, whereas the second example identifies the potential of text mining methods for business to consumer electronic commerce. The third application shows the benefits of text mining for law documents. Finally we present an application which deals with authorship attribution on the famous Wizard of Oz book series. (author's abstract)

Published
2008

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