My research is focused on the development and integration of algorithms for community detection, ranking and recommendations into collaborative tagging systems. Further topics of interest include citation and link analysis, entity matching and resolution, and social network analysis.
Furthermore, I am leading the development of our own system, BibSonomy, which is used as test-bed for our methods and results.
Auf der Plattform handbuch.io des Open Science Lab der TIB Hannover schrieben vor und während der CeBIT 2014 in einem Book Sprint 15 eingeladene Expertinnen und Experten, viele davon aus dem Leibniz Forschungsverbund Science 2.0, das Handbuch CoScience - Gemeinsam forschen und publizieren mit dem Netz.
1st Part: "Prof. Bruns, Prof. Burguess & Dr. Woodford: Mapping Online Publics: New Methods for Twitter Research"
2nd Part: "Robert Jäschke: Identifying and Analyzing Researchers on Twitter"
This year's discovery challenge presents two tasks in the new area
of social bookmarking. One task covers spam detection and
the other covers tag recommendations. As we are hosting the social bookmark and
publication sharing system BibSonomy, we are able to provide a dataset
of BibSonomy for the challenge. A training dataset for both tasks is provided at the beginning of the competition.
The test dataset will be released 48 hours before the final deadline. Due to a very tight schedule we cannot grant any deadline
extension.
The presentation of the results will take place at the ECML/PKDD workshop where the top teams are
invited to present their approaches and results.
mendation service which can be called via HTTP by BibSonomy's recommender when a user posts a bookmark or publication. All participating recommenders are called on each posting process, one of them is choosen to actually deliver the results to the user. We can then measure
With the Web serving as a huge worldwide data repository, issues related to data semantics (familiar to database modelers since the 1970s) have again become of paramount importance. As Web data comes from heterogeneous, possibly ...
Social bookmarking systems and their emergent information structures, known as folksonomies, are increasingly important data sources for Semantic Web applications. A key question for harvesting semantics from these systems is how to extend and adapt traditional notions of similarity to folksonomies, and which measures are best suited for applications such as navigation support, semantic search, and ontology learning. Here we build an evaluation framework to compare various general folksonomy-based similarity measures derived from established information-theoretic, statistical, and practical measures. Our framework deals generally and symmetrically with users, tags, and resources. For evaluation purposes we focus on similarity among tags and resources, considering different ways to aggregate annotations across users. After comparing how tag similarity measures predict user-created tag relations, we provide an external grounding by user-validated semantic proxies based on WordNet and the Open Directory. We also investigate the issue of scalability. We find that mutual information with distributional micro-aggregation across users yields the highest accuracy, but is not scalable; per-user projection with collaborative aggregation provides the best scalable approach via incremental computations. The results are consistent across resource and tag similarity.
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PhD Student, Ecole Centrale Paris - PhD student à l'Ecole Centrale Paris, thèse de mathématiques appliquées et informatique au laboratoire MAS. For more information, don't hesitate to contact me. - Voir le profil professionnel de Abal-Kassim CHEIK AHAMED. Viadeo aide les professionnels comme Abal-Kassim CHEIK AHAMED (PAU) à se faire connaitre et à gérer leur carrière.
1st Part: "Prof. Bruns, Prof. Burguess & Dr. Woodford: Mapping Online Publics: New Methods for Twitter Research"
2nd Part: "Robert Jäschke: Identifying and Analyzing Researchers on Twitter"
Auf der Plattform handbuch.io des Open Science Lab der TIB Hannover schrieben vor und während der CeBIT 2014 in einem Book Sprint 15 eingeladene Expertinnen und Experten, viele davon aus dem Leibniz Forschungsverbund Science 2.0, das Handbuch CoScience - Gemeinsam forschen und publizieren mit dem Netz.
Borgogna, 1098: un gruppo di monaci al seguito dell’abate Roberto abbandona definitivamente l’abbazia benedettina di Molesme, dopo una serie di tentativi vòlti a svincolarsi dai condizionamenti della realtà monastico-feudale del tempo, per edificare una nuova realtà spirituale, comunitaria e sociale ispirata alla Regula s. Benedicti e ai Padri del deserto. Nasce così il Nuovo Monastero nella località paludosa chiamata Cistercium, Cîteaux. Al culmine di un serrato confronto tra le due comunità monastiche, che coinvolgono gli ambienti laicali ed ecclesiastici ad esse afferenti, un ordine di papa Urbano II intima infine a Roberto il ritorno a Molesme, causando una scia di polemiche protratta nel tempo. Pertanto la figura del «capostipite» della generazione cisterciense, Roberto, lungi dall’essere rivestita dalla patina di una letteratura edificante (eccettuata almeno in parte la sua agiografia), si presenta al lettore odierno come l’oggetto di opposte interpretazioni a partire dal tempo della sua morte, fino ai nostri giorni. Il presente volume intende fornire una ricostruzione e un’interpretazione della vicenda delle origini di Cîteaux nel contesto della riforma della Chiesa dell’XI secolo, attraverso un’originale rilettura delle fonti storiche e letterarie (tra cui testi rari o poco visitati) e uno studio sistematico del dibattito storiografico. La figura di Roberto emerge in tal modo in tutta la sua complessità di uomo alla convergenza di due mondi.
B. Hoser, A. Hotho, R. Jäschke, C. Schmitz, и G. Stumme. Proceedings of the 3rd European Semantic Web Conference, том 4011 из LNCS, стр. 514-529. Budva, Montenegro, Springer, (июня 2006)
P. Cimiano, A. Hotho, и S. Staab. Proceedings of the European Conference on Artificial Intelligence (ECAI'04), стр. 435-439. Valencia, Spain, IOS Press, (2004)
P. Cimiano, A. Hotho, G. Stumme, и J. Tane. Proceedings of the The Second International Conference on Formal Concept Analysis (ICFCA 04), том 2961 из LNCS, Springer, (2004)
P. Cimiano, A. Hotho, и S. Staab. Proceedings of the Conference on Languages Resources and Evaluation (LREC), Lisbon, Portugal, ELRA - European Language Ressources Association, (мая 2004)
B. Lauser, и A. Hotho. Proc. of the 7th European Conference in Research and Advanced Technology for Digital Libraries, ECDL 2003, том 2769 из LNCS, стр. 140-151. Springer, (2003)
A. Hotho, S. Staab, и G. Stumme. Proc. of the 7th European Conference on Principles and Practice of Knowledge Discovery in Databases, PKDD, том 2838 из LNCS, стр. 217-228. (2003)
A. Maedche, A. Hotho, и M. Wiese. Data Warehousing and Knowledge Discovery, Second International Conference, DaWaK 2000, London, UK, том 1874 из LNCS, стр. 258-264. Springer, (2000)
A. Hotho, Y. Sure, и L. Getoor (Ред.) (августа 2004)located at the 10th International ACM SIGKDD Conference on Knowledge Discovery and Data Mining KDD 2004, 22nd August 2004, Seattle, WA, USA.
A. Hotho, и G. Stumme (Ред.) Universität Karlsruhe, (октября 2003)Proceedings der Workshopwoche der GI-Fachgruppen/Arbeitskreise FGML, FGWM, ABIS, AKKD.
B. Berendt, A. Hotho, D. Mladenic, M. van Someren, M. Spiliopoulou, и G. Stumme (Ред.) Cavtat/Dubrovnik, Croatia, Workshop at the 14th Europ. Conf. on Machine Learning (ECML'03) / 7th Europ. Conf. on Principles and Practice of Knowledge Discovery in Databases (PKDD'03), (сентября 2003)
B. Berendt, A. Hotho, и G. Stumme (Ред.) Helsinki, Workshop at 13th Europ. Conf. on Machine Learning (ECML'02) / 6th Europ. Conf. on Principles and Practice of Knowledge Discovery in Databases (PKDD'02), (августа 2002)
G. Stumme, A. Hotho, и B. Berendt (Ред.) Freiburg, Workshop at 12th Europ. Conf. on Machine Learning (ECML'01) / 5th Europ. Conf. on Principles and Practice of Knowledge Discovery in Databases (PKDD'01), (сентября 2001)
A. Hotho, R. Jäschke, C. Schmitz, и G. Stumme. Proc. First International Conference on Semantics And Digital Media Technology (SAMT), том 4306 из Lecture Notes in Computer Science, стр. 56-70. Springer, (2006)
S. Staab, и A. Hotho. Intelligent Information Processing and Web Mining, Proceedings of the International IIS: IIPWM'03 Conference held in Zakopane, стр. 451-452. (2003)
B. Berendt, A. Hotho, и G. Stumme. Proc. of the 1st Intl. Workshop on Representation and Analysis of Web Space, стр. 1--16. Technical University of Ostrava, (2005)
A. Schmidt, и C. Kunzmann. Expanding the Knowledge Economy: Issues, Applications, Case Studies. Proceedings of E-Challenges 2007, Amsterdam, IOS Press, (2007)
V. Zacharias, A. Abecker, D. Vrandecic, I. Borgi, S. Braun, и A. Schmidt. New Forms of Reasoning for the Semantic Web: Scalable, Tolerant and Dynamic 2007. Proceedings of the First International Workshop, ISWC 2007, Busan, Korea, November 11, 2007, том 291 из CEUR Workshop Proceedings, (2007)
S. Braun, A. Schmidt, A. Walter, G. Nagypal, и V. Zacharias. Proceedings of the Workshop on Social and Collaborative Construction of Structured Knowledge (CKC 2007) at the 16th International World Wide Web Conference (WWW2007) Banff, Canada, May 8, 2007, том 273 из CEUR Workshop Proceedings, (2007)
S. Braun, A. Schmidt, A. Walter, и V. Zacharias. Emergent Semantics and Ontology Evolution 2007. Proceedings of the First International Workshop on Emergent Semantics and Ontology Evolution (ESOE-2007), ISWC 2007, Busan, Korea, November 12, 2007., том 292 из CEUR Workshop Proceedings, стр. 5-18. (2007)
A. Shakya, H. Takeda, V. Wuwongse, и I. Ohmukai. Poster + Demo Proceedings of the 6th International Semantic Web Conference and the 2nd Asian Semantic Web Conference, 2007 (ISWC 2007+ASWC 2007), Busan, Korea, стр. 93-94. Busan, Korea, (ноября 2007)
R. Jäschke, L. Marinho, A. Hotho, L. Schmidt-Thieme, и G. Stumme. Knowledge Discovery in Databases: PKDD 2007, 11th European Conference on Principles and Practice of Knowledge Discovery in Databases, том 4702 из Lecture Notes in Computer Science, стр. 506-514. Berlin, Heidelberg, Springer, (2007)
A. Shakya, V. Wuwongse, H. Takeda, и I. Ohmukai. Proceedings of the Semantic Authoring, Annotation and Knowledge Markup, стр. 47-54. Whistler, British Columbia, Canada, (октября 2007)Located at the 4th International Conference on Knowledge Capture (KCap 2007).
R. Jäschke, A. Hotho, C. Schmitz, и G. Stumme. Proceedings of the 15th International Conference on Conceptual Structures (ICCS 2007), том 4604 из Lecture Notes in Artificial Intelligence, стр. 283--295. Berlin, Heidelberg, Springer-Verlag, (июля 2007)
J. Nerbonne, и S. Konstantopoulos. Intelligent Information Processing and Web Mining. Proceedings of the International IIS: IIPWM'04 Conference held in Zakopane, Poland, May 17-20, 2004, стр. 493--502. Berlin, Springer, (2004)
S. Konstantopoulos. Computational Linguistics in the Netherlands 2002. Selected Papers from the Thirteenth CLIN Meeting., том 47 из Language and Computers, Amsterdam, Rodopi, (2003)