Giannis Tsakonas

digital library evaluation libraries greece domain ontology frbr library data viaf lod sparql s.o.r. jcdl2013 dileo open bibliographic data e-lis user-centered evaluation institutional repositories dspace evaluation planning nemertes information searching ir information behavior user studies information seeking cir owl ontology isaar isad metadata archives topic modeling text mining network analysis koha library open source integrated library system βιβλιοθήκες πάτρα συνεργασία ακαδημαϊκές greek library association ifla inspiration eebep conference literature altmetrics mendeley citations technology northumbria evaluation performance measurement and metrics