| Vol-497 Copyright © 2009 for the individual papers by the papers' authors. Copying permitted for private and academic purposes. Re-publication of material from this volume requires permission by the copyright owners. This volume is published by its editors.

# ECML PKDD Discovery Challenge 2009 - DC09

### Proceedings of ECML PKDD (The European Conference on Machine Learning and Principles and Practice of Knowledge Discovery in Databases) Discovery Challenge 2009, Bled, Slovenia, September 7, 2009.

Edited by

###

- Folke Eisterlehner *
- Andreas Hotho #
- Robert Jäschke *

* University of Kassel, Knowledge & Data Engineering Group, Wilhelmshöher Allee 73, 34121 Kassel, Germany
# University of Würzburg, Intelligent Systems Group, Am Hubland, 97074 Würzburg, Germany

- Here you can download the complete proceedings as a single PDF-file (~5MB).

## Table of Contents

1. Relational Classification for Personalized Tag Recommendation
   Leandro Balby Marinho, Christine Preisach, and Lars Schmidt-Thieme
2. Measuring Vertex Centrality in Co-occurrence Graphs for Online Social Tag Recommendation
   Iván Cantador, David Vallet, and Joemon M. Jose
3. Social Tag Prediction Base on Supervised Ranking Model
   Hao Cao, Maoqiang Xie, Lian Xue, Chunhua Liu, Fei Teng, and Yalou Huang
4. Tag Recommendations Based on Tracking Social Bookmarking Systems
   Szymon Chojnacki
5. A Fast Effective Multi-Channeled Tag Recommender
   Jonathan Gemmell, Maryam Ramezani, Thomas Schimoler, Laura Christiansen, and Bamshad Mobasher
6. A Modified and Fast Perceptron Learning Rule and its Use for Tag Recommendations in Social Bookmarking Systems
   Anestis Gkanogiannis and Theodore Kalamboukis
7. Discriminative Clustering for Content-Based Tag Recommendation in Social Bookmarking Systems
   Malik Tahir Hassan, Asim Karim, Suresh Manandhar, and James Cussens
8. Time Based Tag Recommendation Using Direct and Extended Users Sets
   Tereza Iofciu and Gianluca Demartini
9. A Weighting Scheme for Tag Recommendation in Social Bookmarking Systems
   Sanghun Ju and Kyu-Baek Hwang
10. ARKTiS - A Fast Tag Recommender System Based On Heuristics
    Thomas Kleinbauer and Sebastian Germesin
11. Tag Recommendation Using Probabilistic Topic Models
    Ralf Krestel and Peter Fankhauser
12. A Probabilistic Ranking Approach for Tag Recommendation
    Zhen Liao, Maoqiang Xie, Hao Cao, and Yalou Huang
13. Tag Sources for Recommendation in Collaborative Tagging Systems
    Marek Lipczak, Yeming Hu, Yael Kollet, and Evangelos Milios
14. Collaborative Tag Recommendation System based on Logistic Regression
    E. Montañés, J. R. Quevedo, I. Díaz, and J. Ranilla
15. Content- and Graph-based Tag Recommendation: Two Variations
    Johannes Mrosek, Stefan Bussmann, Hendrik Albers, Kai Posdziech, Benedikt Hengefeld, Nils Opperman, Stefan Robert, and Gerrit Spira
16. A Two-Level Learning Hierarchy of Concept Based Keyword Extraction for Tag Recommendations
    Hendri Murfi and Klaus Obermayer
17. STaR: a Social Tag Recommender System
    Cataldo Musto, Fedelucio Narducci, Marco de Gemmis, Pasquale Lops, and Giovanni Semeraro
18. Combining Tag Recommendations Based on User History
    Ilari T. Nieminen
19. Factor Models for Tag Recommendation in BibSonomy
    Steffen Rendle and Lars Schmidt-Thieme
20. Content-based and Graph-based Tag Suggestion
    Xiance Si, Zhiyuan Liu, Peng Li, Qixia Jiang, and Maosong Sun
21. RSDC'09: Tag Recommendation Using Keywords and Association Rules
    Jian Wang, Liangjie Hong and Brian D. Davison
22. Understanding the User: Personomy Translation for Tag Recommendation
    Robert Wetzker, Alan Said, and Carsten Zimmermann
23. A Tag Recommendation System Based on Contents
    Ning Zhang, Yuan Zhang, and Jie Tang
24. A Collaborative Filtering Tag Recommendation System Based on Graph
    Yuan Zhang, Ning Zhang, and Jie Tang

02-Sep-2009: submitted by R. Jäschke
02-Sep-2009: published on CEUR-WS.org