Archived project

3cixty

Goal: Providing personalized view of a city to the citizens and to the tourists.

Date: 1 January 2014 - 1 December 2015

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Project log

Giuseppe Rizzo
added a research item
One of the major issues encountered in the generation of knowledge bases is the integration of data coming from a collection of heterogeneous data sources. A key essential task when integrating data instances is the entity matching. Entity matching is based on the definition of a similarity measure among entities and on the classification of the entity pair as a match if the similarity exceeds a certain threshold. This parameter introduces a trade-off between the precision and the recall of the algorithm, as higher values of the threshold lead to higher precision and lower recall, and lower values lead to higher recall and lower precision. In this paper, we propose a stacking approach for threshold-based classifiers. It runs several instances of classifiers corresponding to different thresholds and use their predictions as a feature vector for a supervised learner. We show that this approach is able to break the trade-off between the precision and recall of the algorithm, increasing both at the same time and enhancing the overall performance of the algorithm. We also show that this hybrid approach performs better and is less dependent on the amount of available training data with respect to a supervised learning approach that directly uses properties' similarity values. In order to test the generality of the claim, we have run experimental tests using two different threshold-based classifiers on two different data sets. Finally, we show a concrete use case describing the implementation of the proposed approach in the generation of the 3cixty Nice knowledge base.
Catalin-Mihai Barbu
added 2 research items
The 3 cixty platform supports the development of (mobile or web-based) applications that exploit a comprehensive urban knowledge base in innovative ways, offering a "360-degree view" of a city. We demonstrate an application, called E xplor MI 360, that makes use of the services offered by this platform and allows users to plan and conduct city visits in an innovative way.
3cixty is a flexible and modular platform that integrates heterogeneous data in a semantic knowledge base and provides a full API ecosystem that affords the rapid development of web and mobile apps. It allows answering complex queries that combine different types of information about events, places, and means of transportation in a city. We describe ExplorMI 360, the first large-scale solution based on 3cixty, which has been developed to support visitors to Milan and Expo 2015. By leveraging services already deployed in smart cities, the application aims to support tourists arriving in a new city in planning their visit, exploring their surroundings, and moving around efficiently.
Rachit Agarwal
added a research item
Planning a visit to Expo Milano 2015 or simply touring in Milan are activities that require a certain amount of a priori knowledge of the city. In this paper, we present the process of building such a comprehensive knowledge base, the 3cixty KB, that contains descriptions of events, places, transportation facilities and social activities, collected from numerous static, near-and real-time local and global data providers, including Expo Milano 2015 official services and several social media platforms. Entities in the 3cixty KB are deduplicated, interlinked and enriched using semantic technologies. The 3cixty KB is empowering the Ex-plorMI 360 multi-device application, which has been officially endorsed by the E015 Technical Management Board and has gained the patronage of Expo Milano 2015, thus offering a unique testing scenario for the 20 million expected visitors along the 6 months of the exhibit. As of Septem-ber 7th, 2015 the 3cixty KB contains unique descriptions of 18, 665 events, 758 artists, 225, 552 places, 9, 342 transportation facilities, 95, 570 illustrating photos and 94, 789 reviews contributed by 81, 944 users. The 3cixty KB is accessible at http://3cixty.eurecom.fr/sparql while ExplorMI 360 at https://www.3cixty.com.
Rachit Agarwal
added a project goal
Providing personalized view of a city to the citizens and to the tourists.
 
Rachit Agarwal
added a research item
Planning a visit to Expo Milano 2015 or simply touring in Milan are activities that require a certain amount of a priori knowledge of the city. In this paper, we present the process of building such comprehensive knowledge bases that contain descriptions of events and activities, places and sights, transportation facilities as well as social activities, collected from numerous static, near- and real-time local and global data providers, including hyper local sources such as the Expo Milano 2015 official services and several social media platforms. Entities in the 3cixty KB are deduplicated, interlinked and enriched using semantic technologies. The 3cixty KB is empowering the ExplorMI 360 multi-device application, which has been officially endorsed by the E015 Technical Management Board and has gained the patronage of Expo Milano in 2015, thus has offered a unique testing scenario for the 20 million visitors along the 6 months of the exhibit. In 2016-2017, new knowledge bases have been created for the cities of London, Madeira and Singapore, as well as for the entire French Cote d'Azur area. The 3cixty KB is accessible at https://kb.3cixty.com/sparql while ExplorMI 360 at https://www.3cixty.com and in the Google Play Store and Apple App Store.