2012 Eighth Latin American Web Congress

25-27 Oct. 2012

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  • [Front and back cover]

    Publication Year: 2012, Page(s): C4
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  • [Title page i]

    Publication Year: 2012, Page(s): i
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  • [Title page iii]

    Publication Year: 2012, Page(s): iii
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  • [Copyright notice]

    Publication Year: 2012, Page(s): iv
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  • Table of contents

    Publication Year: 2012, Page(s):v - vii
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  • Preface

    Publication Year: 2012, Page(s): viii
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  • Program Chairs' Message

    Publication Year: 2012, Page(s): ix
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  • Conference Organization

    Publication Year: 2012, Page(s): x
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  • Program Committee

    Publication Year: 2012, Page(s): xi
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  • Additional reviewers

    Publication Year: 2012, Page(s): xii
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  • Sponsors

    Publication Year: 2012, Page(s): xiii
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  • Clustering Heterogeneous Data Sets

    Publication Year: 2012, Page(s):1 - 8
    Cited by:  Papers (2)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (2005 KB) | HTML iconHTML

    Recent years have seen an increasing interest in clustering data comprising multiple domains or modalities, such as categorical, numerical and transactional, etc. This kind of data is sometimes found within the context of clustering multiview, heterogeneous, or multimodal data. Traditionally, different types of attributes or domains have been handled by first combining them into one format (possib... View full abstract»

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  • Hyperlink of Men

    Publication Year: 2012, Page(s):9 - 16
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (320 KB) | HTML iconHTML

    Hand-made hyperlinks are increasingly outnumbered by automatically generated links, which are usually based on text similarity or some sort of recommendation algorithm. In this paper we explore the current linking and appreciation of automatically generated links. To what extent do they prevail on the Web, in what forms do they appear, and do users think those generated links are just as good as h... View full abstract»

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  • Improving the Efficiency of a Genre-Aware Approach to Focused Crawling Based on Link Context

    Publication Year: 2012, Page(s):17 - 23
    Cited by:  Papers (6)  |  Patents (1)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (279 KB) | HTML iconHTML

    Focused crawlers attempt to crawl web pages that are relevant to a specific topic or user interest. Although these kinds of crawlers have been proven to be effective, they need to improve their efficiency. Focused crawlers usually use a Frontier of non-visited URLs to visit the web pages and gather relavant ones. In this work, we define and evaluate a queueing policy of non-visited URLs, based on ... View full abstract»

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  • A Visual Tool for Querying and Exploring XML Data

    Publication Year: 2012, Page(s):24 - 27
    Cited by:  Papers (1)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (484 KB) | HTML iconHTML

    We present a visual tool based in XQuery for querying and exploring XML documents. The tool is based in a simple but effective visual metaphor and a results visualization technique based in fisheye Trees. The application fulfills the expectations of facilitating the manipulation of XML documents for inexperienced users, offering original interaction features, improving upon similar work. As XML is... View full abstract»

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  • Multi-source Conflating Index Construction for Local Search in a Low-Coverage Country

    Publication Year: 2012, Page(s):28 - 31
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (633 KB) | HTML iconHTML

    Local search is a well-established mode of Web search engines today. For most developed countries, a huge amount of data is directly available on the Web and can be extracted and processed by search engines. In many developing countries, the Web coverage is much lower and only little information is directly available. To develop a Local Search that still can provide sufficient coverage, a hybrid m... View full abstract»

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  • Opinion Dynamics of Elections in Twitter

    Publication Year: 2012, Page(s):32 - 39
    Cited by:  Papers (5)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (793 KB) | HTML iconHTML

    In this work we conduct an empirical study of opinion time series created from Twitter data regarding the 2008 U.S. elections. The focus of our proposal is to establish whether a time series is appropriate or not for generating a reliable predictive model. We analyze time series obtained from Twitter messages related to the 2008 U.S. elections using ARMA/ARIMA and GARCH models. The first models ar... View full abstract»

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  • Taking the Pulse of Political Emotions in Latin America Based on Social Web Streams

    Publication Year: 2012, Page(s):40 - 47
    Cited by:  Papers (3)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (1711 KB) | HTML iconHTML

    Social media services have become increasingly popular and their penetration is worldwide. Micro-blogging services, such as Twitter, allow users to express themselves, share their emotions and discuss their daily life affairs in real-time, covering a variety of different points of view and opinions, including political and event-related topics such as immigration, economic issues, tax policy or el... View full abstract»

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  • Arc-Community Detection via Triangular Random Walks

    Publication Year: 2012, Page(s):48 - 56
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (354 KB) | HTML iconHTML

    Community detection in social networks is a topic of central importance in modern graph mining, and the existence of overlapping communities has recently given rise to new interest in arc clustering. In this paper, we propose the notion of triangular random walk as a way to unveil arc-community structure in social graphs: a triangular walk is a random process that insists differently on arcs that ... View full abstract»

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  • Analysis of User Behavior for Web Search Success Using Eye Tracker Data

    Publication Year: 2012, Page(s):57 - 63
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (914 KB) | HTML iconHTML

    Web log data has been the basis for analyzing user query session behavior for a number of years, but it has several important shortcomings. The main one being that we do not really know what the user is doing - is s/he looking at the screen or doing something else? We have conducted an Eye-Tracking study to analyze user behavior when searching the web and looking for specific information on result... View full abstract»

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  • An Eye Tracking Study on Text Customization for User Performance and Preference

    Publication Year: 2012, Page(s):64 - 70
    Cited by:  Papers (1)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (504 KB) | HTML iconHTML

    This paper presents a user study which compares reading performance versus user preference in customization of the text. We study the following parameters: grey scales for the font and the background, colors combinations, font size, column width and spacing of characters, lines and paragraphs. We used eye tracking to measure the reading performance of 92 participants, and questionnaires to collect... View full abstract»

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  • A Recommendation-Based Web Usage Mining Model for a University Community

    Publication Year: 2012, Page(s):71 - 78
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (693 KB) | HTML iconHTML

    In this paper a recommendation model based on web usage mining applied to the navigation data from a community college is proposed. The model is composed by an offline and an online module. In the offline module, the web sessions are preprocessed and represented in a vector space model using the frequency of the URLs, and after are grouped based on similarity measure using the Bisecting K-Means cl... View full abstract»

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  • A Genetic Niching Algorithm with Self-Adaptating Operator Rates for Document Clustering

    Publication Year: 2012, Page(s):79 - 86
    Cited by:  Papers (1)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (366 KB) | HTML iconHTML

    We propose a Genetic algorithm for document clustering, where an evolutionary multimodal optimization algorithm evolves candidate cluster representative solutions to search for dense regions in the sparse high dimensional vector space of text documents. The evolution affects not only the document cluster representatives but also the genetic operator rates which are evolved simultaneously with the ... View full abstract»

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  • GraphGen: A Tool for Automatic Generation of Multipartite Graphs from Arbitrary Data

    Publication Year: 2012, Page(s):87 - 94
    Cited by:  Papers (2)  |  Patents (2)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (666 KB) | HTML iconHTML

    In this paper, we present a generic model for automatic generation of basic multi-partite graphs obtained from input data that are collections of complex objects composed by a set or list of heterogeneous elements. This generic model is the formal basis of a tool for automatic graph generation that we have developed. This tool automatically generates the basic multi-partite graph that represents t... View full abstract»

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  • Incorporating 3D Sound in Different Virtual Worlds

    Publication Year: 2012, Page(s):95 - 99
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (462 KB) | HTML iconHTML

    The use of virtual tools in a university level results in a series of benefits. A virtual world allows the students to interact with modern technology, to learn with different tools, etc. This project was developed to be used in the Interaction Computer-Human and Computer Graphics courses, due to different manipulations kind, and the combination 3D graphics and sound, at the Bachelor in Computer E... View full abstract»

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