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Università della Svizzera italiana

Adaptive query-based sampling of distributed collections

Baillie, Mark ; Azzopardi, Leif ; Crestani, Fabio

In: Lecture Notes in Computer Science, 2006, vol. 4209, p. 316-328

As part of a Distributed Information Retrieval system a description of each remote information resource, archive or repository is usually stored centrally in order to facilitate resource selection. The acquisition of precise resource descriptions is therefore an important phase in Distributed Information Retrieval, as the quality of such representations will impact on selection accuracy, and...

Università della Svizzera italiana

Appearance and functionality of electronic books : lessons from the visual book and hyper-textbook projects

Crestani, Fabio ; Landoni, Monica ; Melucci, Massimo

In: International journal on digital libraries, 2006, vol. 6, no. 2, p. 192-209

We present the results and the lessons learned from two separate and independent studies into the design, development, and evaluation of electronic books for information access: the Visual Book and the Hyper-TextBook. The Visual Book explored the importance of the visual component of the book metaphor in the production of “good” electronic books for referencing. The Hyper-TextBook...

Università della Svizzera italiana

Building queries for prior-art search

Mahdabi, Parvaz ; Keikha, Mostafa ; Gerani, Shima ; Landoni, Monica ; Crestani, Fabio

In: Lecture notes in computer science, 2011, vol. 6653, no. -, p. 3-15

Prior-art search is a critical step in the examination procedure of a patent application. This study explores automatic query generation from patent documents to facilitate the time-consuming and labor-intensive search for relevant patents. It is essential for this task to identify discriminative terms in different fields of a query patent, which enables us to distinguish relevant patents from...

Università della Svizzera italiana

Concept-based semantic annotation, indexing and retrieval of office-like document units

Nešic, Saša ; Jazayeri, Mehdi ; Crestani, Fabio ; Gaševic, Dragan

We present an ontology-driven approach to semantic annotation, indexing and retrieval of document units. This approach is based on a novel semantic document model (SDM) that we developed to make office-like document units be uniquely identified, semantically annotated with concepts from annotation ontologies and linkable across document boundaries. In the semantic annotation model that we...

Università della Svizzera italiana

Context representation for web search results

Vegas, Jesus ; Crestani, Fabio ; De la Fuente, Pablo

In: Journal of information science, 2007, vol. 33, no. 1, p. 77-101

Context has long been considered very useful to help the user assess the actual relevance of a document. In Web searching, context can help assess the relevance of a Web page by showing how the page is related to other pages in the same Web site, for example. Such information is very difficult to convey and visualise in a user friendly way. In this paper we present the design, implementation and...

Università della Svizzera italiana

Effective search results summary size and device screen size : is there a relationship?

Sweeney, Simon ; Crestani, Fabio

In: Information processing & management, 2006, vol. 42, no. 2, p. 1056-1074

In recent years, small screen devices have seen widespread increase in their acceptance and use. Combining mobility with increased technological advances many such devices can now be considered mobile information terminals. However, user interactions with small display devices remain a challenge due to the inherent input restrictions and limited display capabilities. These challenges are...

Università della Svizzera italiana

Employing document dependency in blog search

Keikha, Mostafa ; Carman, Mark James ; Crestani, Fabio

In: Journal of the American society for information science and technology, 2012, vol. 63, no. 2, p. 354–365

The goal in blog search is to rank blogs according to their recurrent relevance to the topic of the query. State-of-the-art approaches view it as an expert search or resource selection problem. We investigate the effect of content-based similarity between posts on the performance of the retrieval system. We test two different approaches for smoothing (regularizing) relevance scores of posts...

Università della Svizzera italiana

Evaluation of an interactive topic detection and tracking interface

Mohd, Masnizah ; Crestani, Fabio ; Ruthven, Ian

In: Journal of information science, 2012, vol. 38, no. 4, p. 383-398

Interactive Topic Detection and Tracking (iTDT) refers to the TDT works which focus on user interaction, user evaluation and user interfaces aspects. This article investigates and identifies elements of the design of an interface that aims to facilitate journalists performing TDT tasks such as tracking and detection. It presents an (iTDT) interface called Interactive Event Tracking (iEvent),...

Università della Svizzera italiana

Investigating the statistical properties of user-generated documents

Inches, Giacomo ; Carman, Mark J. ; Crestani, Fabio

In: Lecture notes in computer science, 2011, vol. 7022, p. 198-209

The importance of the Internet as a communication medium is reflected in the large amount of documents being generated every day by users of the different services that take place online. In this work we aim at analyzing the properties of these online user-generated documents for some of the established services over the Internet (Kongregate, Twitter, Myspace and Slashdot) and comparing them...