PNS: Personalized Multi-Source News Delivery Georgios Paliouras(1), Mouzakidis Alexandros(1), Christos Ntoutsis(2), Angelos Alexopoulos(3), Christos Skourlas(2) (1) Institute of Informatics and Telecommunications, NCSR "Demokritos", Greece {paliourg, (2) Dept. of informatics,Technological Institute of Athens, Greece (3) Dept. of Informatics and Telecommunications, University of Athens, Greece

Outline Content aggregation News source aggregation Information extraction Url extraction News content extraction Personalization Single user modeling User communities, stereotypes and feature groups Summary and future work

The PNS approach News source aggregation Data collection (spiders and extraction) User modeling Presentation Filtering

Architecture Web Users Content Database 123 Web browser News SourcesPersonalization Server http Request – Response http Request – Response News Content Presenter News Content Scanner News Content Selector

News Content Scanner Html and RSS Feed parsing Extraction of urls that contain articles News content extraction from URLs

News Content Scanner Architecture of News Content Scanner

Personalization Server (PServer) A general purpose personalization web server constructs and maintains models for individual users stereotypes user communities feature groups.

PServer Independent of particular applications Able to adapt to application parameters. Covers a wide range of services and functionality. Easily expandable. Easy to set up and use by ongoing projects

PServer Personalization functionality as a web service: – Centrally installed and maintained. – Completely separated from applications. – Possible for many applications to use concurrently. – Easily accessible through HTTP. Towards an adaptable model. – central concepts: application features, users. – Feature semantics not part of PServer. – Features organization in a tree-like manner facilitates querying. lang.english lang.greek page10.top_frame.banner8

PServer Application communicates with PServer through HTTP requests. PServer response body is formatted in XML. – Especially developed XSLs allow any browser to suitably display the PServer response. Three distinct modes of operation: personal, stereotype.community Application requests provide full control for inserting, updating, deleting and querying data: Each request type can take up many forms, representing a set of possible actual requests.

Pserver: Application Usage user Application designer Personalization meta-service designer Content database User models Knowledge base User interface Content management User model management Inference engine Web usage mining Application layer Personalization layer Knowledge editor Thin-client layer Personalization interface Personalization parameters External databases Data import

News Content Selector Structures the content that must be presented based on the request Personalize the content

News Content Presenter Registration of new users. Identification of registered users. Presentation of the daily news that exist in the Content Index Database according to the users preferences (personal e-paper). Presentation of the daily news according to the preferences of users that belong to the same stereotype. Presentation of the daily news according to the preferences of users that belong to the same user community.

News Content Presenter Presentation of the daily news that belong to the same news itemset as the currently viewed item. Personalized presentation of the news of previous days. Text-based search and presentation of news titles using keywords. Ability to retrieve news highlight in specific dates from the database.

News Content Presenter PNS User interface

Summary Easy to install 100% configurable A wide range of RDBMS can be used 100% Platform Independent PNS now contains 12 news source and 10 categories Static wrapper maintenance

Future work More sources will be added in the future A new module for dynamic wrapper maintenance have to be build Content based personalization will be supported Pserver will be published online as open source software

Thank you for your concentration User Modeling th International Conference on User Modeling (UM 2007) Corfu, Greece, June, 2007 Organized by the National Center for Scientific Research "Demokritos", in collaboration with the Ionian University and User Modeling Inc.