Catálogo de publicaciones - libros

Mobile Web search will gain more importance. This paper proposes a novel method for query refinement based on real-world contexts of a mobile user, such as his/her current geographic location and the typical activities at the location which are extracted by Blog mining. Our method enhances location-awareness and even further context-awareness to the existing location-free keyword-based Web search engines.

This paper will discuss possibilities to create a digital library on traditional Mongolian script. Also we will introduce system architecture of a digital library that will store materials of historical importance written in traditional Mongolian which contain history of over 800 years. Specifically, we will propose a technique that will enable digital library system to allow users to search traditional Mongolian texts with keywords in modern Mongolian Cyrillic characters. To accomplish this goal, we will use Greenstone digital library system and it will be based on a traditional Mongolian dictionary.

This study seeks to report an investigation into the ways in which end-users perceived citation database interfaces (CDI). The investigation uses the Technology Acceptance Model (TAM) constructs of usefulness and ease of use to assess acceptance of citation database interfaces by university graduate students. A structural equation model was used to fit and validate the Citation Database Interface Acceptance Model (CDIAM) and the results indicate good fit to the data. The causal relationships between the constructs considered by the CDIAM are well supported, accounting for 95% of the total variance in the citation database interface acceptance and usage. This study concluded that usefulness and ease of use for citation database interface are proved to be key determinants of the acceptance and usage of citation database. This study may help explain human-computer interaction using MIS-proven TAM instead of traditional system usability approach.

Many conventional digital library systems offer access to their collections only via full text or meta-data search, or by browsing-access via a hierarchy of categories. With the increasing amount of digital content available, alternative methods to access the content seem necessary. The SOMLib system, which is based on using Self-Organizing Maps (SOMs), has been used to automatically organize documents of a digital library by their content. In this paper, we present an integration of this system into the popular open-source digital library system Greenstone, combining searching and explorative browsing through the thematically organized content using the map. We present the system on a demo collection consisting of the abstracts of papers and posters from the last 5 years from the JCDL, ECDL and ICADL conferences.

University Grants Commission (UGC) of Bangladesh has taken an initiative to form a Digital Resources Consortium for the university libraries in Bangladesh for sharing integrated library systems and computer databases, collection development, purchasing of electronic journals, and digital resources. As of today there is no formal platform of consortium is established in Bangladesh. This paper attempt to analyze the suitability of formation of consortium in Bangladesh based on the requirement and usage of digital information and gives some overview of progress in developing a consortium for academic libraries in Bangladesh, with an emphasis on the role of UGC Bangladesh.

Multimedia data has increasingly become a prevalent resource in Digital Library system; this includes audio, video, and image archives. However, each type of these data may need specific tools to help facilitate effective and efficient retrieval tasks. In this paper, we focus on retrieval of speech audio collection, which includes audio books, speech recordings, interviews, and lectures. Currently, most of the audio retrieval systems are based on keyword/title/author search typed into the system by users. The system then searches for particular keywords and gives a list of entire audio files that potentially are relevant to the query. Nonetheless, browsing audio content for particular section of the audios without knowing the actual content is yet a very difficult task. Moreover, since audio transcription or keyword annotation is very labor intensive and becomes infeasible for large data, we introduce here a preliminary framework that locates subsections of the audio that correspond to the voice query made by a user. We demonstrate a utility of our approach on query retrieval tasks in various types of audio recordings. We also show that this simple framework can potentially help retrieve and locate the voice query within the audio accurately and efficiently.

This paper proposes a methodology for acquiring the top k highest-ranking SCORM-compliant teaching materials on grid environments, for a given query. Especially, the ranking criterion combines the relevance of the document and the efficiency of transmission. This methodology consists of three steps. First, the ranking function of each Learning Object Repository (LOR) is evaluated. Next, the number of documents to be retrieved from each LOR is decided according to the Ranking Ratio. Finally, the k documents are retrieved from the grid. To verify this approach, a prototype of the retrieval system was built on a grid testbed. Experimental results showed that the proposed approach can retrieve satisfactory teaching materials for users.

Digital library systems that once were mostly monolithic in construction are slowly making the transition to component-based models. However, it is not clear how best to design or construct the user interfaces to such systems – one alternative would be to create associated interface elements while another would be to create a separable interface layer. This paper discusses an attempt to do the latter by using current browser-based tools – recently named Ajax – in order to visually design the layouts, workflows and service connections of a user experience layer. Expert evaluators provided feedback during this process and the eventual level of functionality and usability of the proof-of-concept system demonstrate the inherent possibilities and relevance of the emerging Ajax technologies for not only the rendering or execution but also the design of browser-based Web applicatons, and digital library systems in particular.

This paper describes a pilot study on Wiki -G-Portal, a project integrating Wikipedia, an online encyclopedia, into G-Portal, a Web-based digital library, of geography resources. Initial findings from the pilot study seemed to suggest positive perceptions on usefulness and usability of Wiki -G-Portal, as well as subjects’ attitude and intention to use.

Growing amount of precious content digitized in digital libraries (DLs) could cost much digitization, backup, and restoration effort. To meet the requirements in a digital archiving system, several issues must be addressed. First, it usually requires much storage and network bandwidth for each individual DL to maintain its own backup service. Second, the manual effort makes it difficult to maintain. In this paper, we propose a peer-to-peer (P2P) approach to collaborative repository for DLs. Cooperating spiders are utilized to facilitate efficient and scalable archiving without much manual effort. The spidering-based approach can automatically keep the structure of content thus enabling simpler implementation and easier support for cross-archive applications. Preliminary experimental results show the potential of the proposed approach.