Catálogo de publicaciones - libros

The availability of large music repositories poses challenging research problems, which are also related to the identification of different performances of music scores. This paper presents a methodology for music identification based on hidden Markov models. In particular, a statistical model of the possible performances of a given score is built from the recording of a single performance. To this end, the audio recording undergoes a segmentation process, followed by the extraction of the most relevant features of each segment. The model is built associating a state for each segment and by modeling its emissions according to the computed features. The approach has been tested with a collection of orchestral music, showing good results in the identification and tagging of acoustic performances.

The paper studies the problem of implementing MultiLingual Information Access (MLIA) functionality in The European Library (TEL). The issues that must be considered are described in detail and the results of a preliminary feasibility study are presented. The paper concludes by discussing the difficulties inherent in attempting to provide a realistic full-scale MLIA solution and proposes a roadmap aimed at determining whether this is in fact possible.

We present MinervaDL, a digital library architecture that supports approximate information retrieval and filtering functionality under a single unifying framework. The architecture of MinervaDL is based on the peer-to-peer search engine Minerva, and is able to handle huge amounts of data provided by digital libraries in a distributed and self-organizing way. The two-tier architecture and the use of the distributed hash table as the routing substrate provides an infrastructure for creating large networks of digital libraries with minimal administration costs. We discuss the main components of this architecture, present the protocols that regulate node interactions, and experimentally evaluate our approach.

In large-scale distributed retrieval, challenges of latency, heterogeneity, and dynamicity emphasise the importance of infrastructural support in reducing the development costs of state-of-the-art solutions. We present a service-based infrastructure for distributed retrieval which blends middleware facilities and a design framework to ‘lift’ the resource sharing approach and the computational services of a European Grid platform into the domain of e-Science applications. In this paper, we give an overview of the and illustrate its exploitation in the field of Earth Science.

This paper describes the VIRGIL (Virtual Meeting Archival) system which was developed to provide a simple, practical, easy-to-use method for recording, indexing and archiving large scale distributed videoconferences held over Access Grid nodes. Institutional libraries are coming under increasing pressure to support the storage, access and retrieval of such mixed-media complex digital objects in their institutional repositories. Although systems have been developed to record access grid sessions, they don’t provide simple mechanisms for repository ingestion, search and retrieval; and they require the installation and understanding of complex Access Grid tools to record and replay the virtual meetings. Our system has been specifically designed to enable both: the easy construction and maintenance of an archive of Access Grid sessions by managers; and easy search and retrieval of recorded sessions by users. This paper describes the underlying architecture, tools and Web interface we developed to enable the recording, storage, search, retrieval and replay of collaborative Access Grid sessions within a Fedora repository.

Object transformation for preservation purposes is currently a hit-or-miss affair, where errors in transformation may go unnoticed for years since manual quality assurance is too resource-intensive for large collections of digital objects. We propose an approach of semi-automatic quality assurance (QA), where numerous separate automatic checks of “aspects” of the objects, combined with manual inspection, provides greater assurance that objects are transformed with little or no loss of quality. We present an example of using this approach to appraise the quality of OpenOffice’s import of Word documents.

One of the main goals of the Nautical Archaeology Digital Library (NADL) is to assist nautical archaeologists in the reconstruction of ancient ships and the study of shipbuilding techniques. Ship reconstruction is a specialized task that requires supporting materials such as reference to fragments and timbers recovered from other excavations and consultation of shipbuilding treatises. The latter are manuscripts written in a variety of languages and spanning several centuries. Due to their diverse provenance, technical content, and time of writing, shipbuilding treatises are complex written sources. In this paper we discuss a digital library approach to handle these manuscripts and their multilingual properties (often including unknown terms and concepts), and how scholars in different countries are collaborating in this endeavor. Our collection of treatises raises interesting challenges and provides a glimpse of the relationship between texts and illustrations, and their mapping to physical objects.

This paper describes the general approach has taken in designing a catalogue of criteria for trustworthy digital repositories for long-term preservation and how this approach relates to internationalisation and standardisation of criteria and developments of evaluation methods to facilitate the audit and certification process.

The German Remote Sensing Data Center (DFD) has developed a digital library for the long-term management of earth observation data products. This Product Library is a central part of DFD’s multi-mission ground segment Data and Information Management System (DIMS) currently hosting one million digital products, corresponding to 150 Terabyte of data. Its data model is regularly extended to support products of upcoming earth observation missions. The ever increasing complexity led to the development of operating interfaces which use a-priori and context knowledge, allowing efficient management of the dynamic library content. This paper presents the development and operating of context-sensitive library access tools based on meta modeling and online grammar interpretation.

On the Internet, a large number of documents such as news articles and online journals are delivered everyday. We often have to review major topics and topic transitions from a large time-series of documents, but it requires much time and effort to browse and analyze the target documents. We have therefore developed an information visualization system called (Trend/Topic-Scroll) to visualize the transition of topics extracted from those documents. The system takes periodical outputs of the underlying clustering system for a time-series of documents then visualizes the relationships between clusters as a scroll. Using its interaction facility, users can grasp the topic transitions and the details of topics for the target time period. This paper describes the idea, the functions, the implementation, and the evaluation of the T-Scroll system.