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\workshopHeader{Discovery Challenge: Pascal Large Scale Hierarchical Classification Workshop}
{Ion Androutsopoulos, Thierry Arti\`{e}res, Patrick Gallinari, Eric Gaussier\\ 
Aris Kosmopoulos, George Paliouras and Ioannis Partalas} % organisers
{10:30--17:30} % please use this time format everywhere
{Room: Wills, Great Hall}
{Friday}

% Add an introduction to the workshop here
\workshopIntro{Hierarchies are becoming ever more popular for the organization of documents, particularly on the Web (e.g.\ Web directories). Along with their widespread use comes the need for automated classification of new documents to the categories in the hierarchy. Research on large-scale classification so far has focused on large numbers of documents and/or large numbers of features, with a limited number of categories. However, hierarchical category systems such as DMOZ or Wikipedia contain several hundreds of thousands categories raising new challenges. Approaching this problem, researchers have either extended existing large-scale classifiers, or have developed new models and methods.

LSHC3 is the third in the series of workshops on large-scale hierarchical classification. The workshop aims at bringing together researchers and practitioners of large-scale category systems and discussing recent trends and solutions. }


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\timeTitlePeople{10:30--11:30}{Invited Talk:  Large-scale Learning with Gauge Regularization for Visual Classification}{Zaid Harchaoui}

%\timeTitlePeopleAbstract{09:10-10:30}
%{Invited talk: A theory of inheritance of acquired characteristics}
%{Jean-Baptiste Lamarck}
%{}

\timeTitlePeople{11:30--12:15}{Presentation of the Challenge}{Workshop Organizers}

\timeTitlePeople{12:15--12:45}{A k-NN Method for Large Scale Hierarchical
Text Classification at LSHTC3}{Xiaogang Han, Shaohua Li and Zhiqi Shen}

\timeTitlePeople{12:45--13:00}{Multi-stage Rocchio Classification for Large-scale Multi-labeled Text data}{Dong-Hyun Lee}

\timeTitle{13:00--14:30}{  Lunch (not provided)}

\timeTitlePeople{14:30--15:00}{TTI's System for the LSHTC3 Challenge}{Yutaka Sasaki and Davy Weissenbacher}


\timeTitlePeople{15:00--15:30}{Ensembles of Sparse Multinomial Classifiers for Scalable Text Classification}{Antti Puurula and Albert Bifet}

\timeTitlePeople{15:30--16:00}{A Fast Dendrogram Refinement Approach for Unsupervised Expansion of Hierarchies}{Ricardo Marcondes Marcacini, Everton A. Cherman, Jean Metz and Solange O. Rezende}

\timeTitle{16:00--16:30}{Coffee break}

\timeTitlePeople{16:30--17:00}{Regularization Framework for Large Scale Hierarchical Classification}{Siddharth Gopal, Yiming Yang and Alexandru Niculescu-Mizil}

\timeTitle{17:00--17:30}{Discussion}



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