In this paper we present SenTube – a dataset of user-generated comments on YouTube videos annotated for information content and sentiment polarity. It contains annotations that allow to develop classifiers for several important NLP tasks: (i) sentiment analysis, (ii) text categorization (relatedness of a comment to video and/or product), (iii) spam detection, and (iv) prediction of comment info...

This study investigated effects of appearance-based rejection sensitivity (Appearance-RS) - the dispositional tendency to anxiously expect rejection based on one's appearance - in a sample of 133 American college students. Participants were randomly assigned to write an essay about either a negative or positive appearance comment they had received in the past. Compared to participants with lowe...

The proliferation of social media is undoubtedly changing the way people produce and consume news online. Editors and publishers in newsrooms need to understand user engagement and audience sentiment evolution on various news topics. News consumers want to explore public reaction on articles relevant to a topic and refine their exploration via related entities, topics, articles and tweets. I wi...

Common social tagging systems like Flickr, del.icio.us and others lately became very popular. The key benefits of these systems include that users get involved in the content creation process, can easily — without overhead – comment or annotate Web content, share resources with fellow users, and benefit from the comments / annotations of other users with improved retrieval support. With GroupMe...

This paper studies the problems and threats posed by a type of spam in the blogosphere, called blog comment spam. It explores the challenges introduced by comment spam, generalizing the analysis substantially to any other short text type spam. The authors analyze different high-level features of spam and legitimate comments based on the content of blog postings. The authors use these features t...

The development of social media applications, such as blogs, Facebook and Twitter, has offered new participatory opportunities for everyday media users. This article contributes to research by looking into one specific aspect of the increasingly more participatory media ecology – the news comment feature. Drawing on a quantitative content analysis of 1100 news pieces, as well as spaces for user...

We present an approach based on multiple representations and multiple queries to tackle the problem of invariance in the framework of content-based image retrieval. We consider the case of textures. This approach, rather than to consider invariance at the representation level, considers it at the query level. We use two models to represent the visual content of textures, namely the autoregressi...

Discussion papers provide a means for researchers, students and professionals to share thoughts and findings on a wide range of topics relating to food, hunger, agriculture and nutrition. They contain preliminary material and are circulated prior to a formal peer review in order to stimulate discussion and critical comment. Some working papers will eventually be published and their content may ...

EPTD Discussion Papers contain preliminary material and research results, and are circulated prior to a full peer review in order to stimulate discussion and critical comment. It is expected that most Discussion Papers will eventually be published in some other form, and that their content may also be revised. THE EFFECT OF ENVIRONMENTAL VARIABILITY ON LIVESTOCK AND LAND-USE MANAGEMENT: THE BOR...

CAPRi Working Papers contain preliminary material and research results, and are circulated prior to a full peer review in order to stimulate discussion and critical comment. It is expected that most Working Papers will eventually be published in some other form, and that their content may also be revised. COLLECTIVE ACTION, PROPERTY RIGHTS, AND DEVOLUTION OF NATURAL RESOURCE MANAGEMENT: EXCHANG...