Christoph Trattner

recommender systems tagging search tags social networks food tag recommender; tags; human cognition; act-r big data social computing navigation tag recommender; tags; human cognition; alcove; ac decentralized search graz university of technology tag hierachies health tag taxonomies tag clouds recipes information retrieval taggging smart pharma moki tugraz concepts applications information networks pagination effect tag navigation user study browsing data science meal planning internet human mobility weather patterns cars poi points of interest nutrition crowd evaluation crowdsourcing crowdflower mturk marketing mobile ratings online communities mendeley workshop semantic media wiki wiki bio