This paper discusses a framework enabling real-time multimedia indexing and search across multiple social media sources. It places particular emphasis on the real-time, social and contextual nature of content and information consumption in order to integrate topic and event detection, mining, search and retrieval, based on aggregation and indexing of shared user-generated multimedia content. Us...

We present a system for complementing snow phenomena monitoring with virtual measurements extracted from public visual content. The proposed system integrates an automatic acquisition and analysis of photographs and webcam images depicting Alpine mountains. In particular, the technical demonstration consists in a web portal that interfaces the whole system with the population. It acts as an ent...

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In this paper, we present a novel approach that models the mutual reinforcing relationship among papers, authors and publication venues with due cognizance of publication time. We further integrate bookmark information which models the relationship between users’ expertise and papers’ quality into the composite citation network using random walk with restart framework. The experimental results ...

This article focuses on the representation of physical places on the Internet or what we term cyberscape. While there is a wide range of online place-related information available, this project uses the metric of the number of user-generated Google Maps placemarks containing specific keywords in locations worldwide. After setting out the methods behind this research, this article provides a car...

The quality of user-generated content in Web 2.0 dramatically varies from professional to abusive. Quality assessment is therefore a critical problem in producing, managing and retrieving information in Web 2.0. In this paper, we develop a multi-dimensional model for assessing the quality of answers in social Q&A (Question & Answer) sites.

Increasingly, news breaks on social media, where ordinary citizens post images and videos and their own commentary in the form of text. This user-generated content (UGC) is newsworthy information and invaluable for newsrooms. In order to incorporate this data into a news story, the journalist needs to process, compile and verify information on the social web within a very short timespan. This i...

One Facebook group has repeatedly caught the media‟s attention. The group was called "Israel" is not a country! ... Delist it from Facebook as a country! Despite the opinions of experts who highlighted the racist nature of the group, Facebook refused to take action. After unsuccessfully lobbying Facebook for intervention, an organization known as the Jewish Internet Defense Force (JIDF) took co...

The paper presents a new method of systematically discovering relevant contextual information from the user-generated reviews and, therefore, converting the latent contextual information into the explicit representational view in order to provide better recommendations to the users when the reviews complement traditional ratings used in recommender systems. In particular, we classify all the us...

In this article I test a new graphical, interactive interface that captures both " best estimate " point‐estimates and probability distributions from non‐experts. As in the previous literature, respondents are overconfident. My innovation is to show that in contrast to the standard method of directly asking respondents to state their confidence, using my method, which induces the respondents to...