Luz Marina Quiroga

Reducing cognitive load

This paper explores issues related to cognitive load in the contexts of learning, information filtering, user modeling, categorization and personal information organizing behavior. We incorporate expertise from the fields of information science, educational psychology and computer science to report research that can ultimately influence the design of personalized adaptive systems.

Filtering medical documents using automated and human classification methods

The goal of this research is to clarify the role of document classification in information filtering. An important function of classification, in managing computational complexity, is described and illustrated in the context of an existing filtering system. A parameter called classification homogeneity is presented for analyzing unsupervised automated classification by employing human classification as a control. Two significant components of the automated classification approach, vocabulary discovery and classification scheme generation, are described in detail. Results of classification performance revealed considerable variability in the homogeneity of automatically produced classes. Based on the classification performance, different types of interest profiles were created. Subsequently, these profiles were used to perform filtering sessions. The filtering results showed that with increasing homogeneity, filtering performance improves, and, conversely, with decreasing homogeneity, filtering performance degrades.

Empirical evaluation of explicit versus implicit acquisition of user profiles in information filtering systems

INTRODUCTION To make digital libraries attractive and encourage use, new and value-added services are needed beyond conventional distribution and access mechanisms. An exciting area of development is information personalization services that route, recommend, sort and prune documents (henceforth collectively called filtering) based on users’ interest profiles. Significant advances have been made in filtering systems. However, few studies have considered how different approaches of acquiring profiles can influence filtering effectiveness. Profiles are at the center of our research and one of the issues we are focussing in is profile acquisition by a filtering system that provides general health information.

A thousand ways to say 'Delicious!'—Categorizing expressions of deliciousness from restaurant reviews on the social network site Yelp

This study explored expressions of deliciousness-one of the main reasons people make specific food choices over others-from restaurant reviews on Yelp, a popular social network site. Through qualitative content analysis of 205 reviews from 41 food establishments in Hawaii, we found 8 main categories of expressions of deliciousness. These eight main categories created by both concept-driven and data-driven strategies are Sense, Culinary Affair, Matter of Heart, Health, Testimonial and Endorsement, Personal Signature, Consumer, and Restaurant. Each main category was further subcategorized. This meaningful categorization might contribute to healthier eating by helping policy makers and food companies craft effective strategies for healthy eating schemes, healthy menu items, or healthy food products. Marketers of any food product can also increase their market share by utilizing these categories, subcategories, and their underlying concepts in the planning stage. Detailed examples of nudging and social marketing campaigns inspired by our findings were provided. Moreover, social network sites can better serve health conscious and hedonic consumers by personalization through improved algorithms inspired by these categories.

Using Wikipedia's Content for Cross-Website Page Recommendations that Consider Serendipity

A majority of web personalization research concentrates on customizing a single website. On the contrary, recommending web pages across websites is the focus of this study. We emphasize that eliciting user interests among different topics within a domain is an important concern in cross-website page recommendations. Enhancing Wikipedias categorization system through heuristic information extraction, we constructed a system to study the coverage of a users interests in order to promote serendipity, new and interesting information, in recommendations. We compared our systems performance regarding topicality and serendipity with the classical vector space model and obtained a slightly superior result.

Information Technology Literacy: Examples from Academia in Chile and Hawaii

This research describes the challenging task of identifying new required competencies and responding with new ITL programs in two different regions. The first one, in Chile, is part of an Ibero-American initiative, ALFIN (ALFabetizacion en INformacion). The second one, in Hawaii, is part of a nationwide program in the United States, advocated by the American Library Association, the Association of College and Research Libraries, and the American Association of School Libraries, among other agencies. Research findings include the target audience of IT programs; copyright issues; necessary cooperation among domain instructors, education specialists, librarians and technology specialists; tools and systems being considered; and distance education

Representation of Kanaka Maoli (Hawaiian) culture: a case of hula dance

This paper explores representation of Kanaka Maoli (Hawaiian) Hula Dance representation in traditional systems of representation and organization. The paper found baises and diasportization of representation of Hawaiian Culture. Study emphasizes the need to recognize the “inherent beauty in how and why Indigenous people express and fulfill their desire to learn, preserve, organize, and share knowledge” (Metoyer & Doyle, , p. 475) and advocates a decolonizing methodology to promote alternative information structures in Indigenous communities.

Personal digital collections

The vast growth in digital content generated by individuals marks a new social trend known as “Generation C” (www.trendwatching.com/trends/GENERATION_C.htm). Personal content ranges from informal to formal, and includes scholarly papers, blogs, genealogical records, personal webpages, photo albums, family videos, music collections, power point presentations, bookmarks, personal correspondence, articles, computer programs, audio recordings (e.g. research interviews), spaces in collaborative systems, and personal digital libraries. Digital storage available for personal use continues to increase dramatically in capacity while declining in cost. Panelists will address challenges in the design of personal digital collections such as gathering, organizing, preserving, segmenting, accessing, and using digital content. Panelists are leaders in their field, representing an array of perspectives.

Recommendations for an Integrated Information System at the Chilean National Council for Drug Prevention

A study aimed at strengthening the information and communication systems for drug prevention, control, and treatment for the Chilean National Council for Drug Prevention (CONACE) is described. Diagnosis and recommendations are based on: analysis of the demand and availability of information and systems; evaluation of the CONACE Center of Documentation and Information (CDI ) collection, users, databases, and services; and, evaluation of the indexing language and the vocabulary for information retrieval used in the CDI databases. Guidelines for incorporating user requirements in the information and communication technologies used by the CDI are provided. The impact of the use of these information systems and technologies for collaboration at the national and international level are discussed.

Digital libraries in action: The Latin American and Caribbean experience. Sponsored by SIG DL

Knowledge acquisition and dissemination can facilitate innovation and provide the engine for economic growth and development. Creating and sharing knowledge can be hindered when multiple languages are spoken in geographically diverse regions that are bound together by cultural proximity. Digital libraries help provide the information infrastructure and technology to overcome these challenges and facilitate knowledge sharing by encouraging collaboration and providing information access. This interactive panel session features experts who are working on the frontlines building and implementing programs that utilize DLs to meet these goals in Latin America and the Caribbean. These projects address technical issues related to cross-lingual access, interoperability, and usability as well as organizational issues related to sharing and integrating research and development streams.