Università della Svizzera italiana

Tracking public opinion on social media

Giachanou, Anastasia ; Crestani, Fabio (Dir.)

Thèse de doctorat : Università della Svizzera italiana, 2018 ; 2018INFO016.

The increasing popularity of social media has changed the web from a static repository of information into a dynamic forum with continuously changing information. Social media platforms has given the capability to people expressing and sharing their thoughts and opinions on the web in a very simple way. The so-called User Generated Content is a good source of users opinion and mining it can be...

Università della Svizzera italiana

Statistical models for the analysis of short user-generated documents : author identification for conversational documents

Inches, Giacomo ; Crestani, Fabio (Dir.)

Thèse de doctorat : Università della Svizzera italiana, 2014 ; 2014INFO019.

In recent years short user-generated documents have been gaining popularity on the Internet and attention in the research communities. This kind of documents are generated by users of the various online services: platforms for instant messaging communication, for real-time status posting, for discussing and for writing reviews. Each of these services allows users to generate written texts...

Università della Svizzera italiana

Query refinement for patent prior art search

Mahdabi, Parvaz ; Crestani, Fabio (Dir.) ; Landoni, Monica (Codir.)

Thèse de doctorat : Università della Svizzera italiana, 2014 ; 2014INFO004.

A patent is a contract between the inventor and the state, granting a limited time period to the inventor to exploit his invention. In exchange, the inventor must put a detailed description of his invention in the public domain. Patents can encourage innovation and economic growth but at the time of economic crisis patents can hamper such growth. The long duration of the application process...

Università della Svizzera italiana

Proximity-based approaches to blog opinion retrieval

Gerani, Shima ; Crestani, Fabio (Dir.)

Thèse de doctorat : Università della Svizzera italiana, 2012 ; 2012INFO004.

Recent years have seen the rapid growth of social media platforms that enable people to express their thoughts and perceptions on the web and share them with other users. Many people write their opinion about products, movies, people or events on blogs, forums or review sites. The so-called User Generated Content is a good source of users’ opinion and mining it can be very useful for a...

Università della Svizzera italiana

Methods for ranking user-generated text streams : a case study in blog feed retrieval

Keikha, Mostafa ; Crestani, Fabio (Dir.)

Thèse de doctorat : Università della Svizzera italiana, 2012 ; 2012INFO003.

User generated content are one of the main sources of information on the Web nowadays. With the huge amount of this type of data being generated everyday, having an efficient and effective retrieval system is essential. The goal of such a retrieval system is to enable users to search through this data and retrieve documents relevant to their information needs. Among the different retrieval...