We explore the problem of out of vocabulary (OOV) queries in audio indexing systems by comparing three indexing methods on a broadcast news repository containing 75 hours of audio. Our systems are word-based, phoneme-based and a novel system based on syllable-like units called particles. To better examine the performance of these three approaches we use a query set where the percentage of OOVs ...

The main hindrance to expanded use of adaptive educational hypermedia systems is the need for content to be properly described in the terms of domain concepts. This requirement slows down the authoring process and creates an obstacle to the broader distribution of such systems. In the current paper, we propose an approach to providing automated content indexing for adaptive educational hypermed...

This paper presents an overview of spatial indexing mechanisms and their implementation in a more general framework, as the one provided by Computer-aided Design systems. It is expected that such mechanisms play an important role in the context of so-called ICAD systems, providing a more rational and efficient management of geometric data. Benefitting from the object-oriented programming concep...

As logic programming applications grow in size, Prolog systems need to efficiently access larger and larger data sets and the need for anyand multiargument indexing becomes more and more profound. Static generation of multiargument indexing is one alternative, but applications often rely on features that are inherently dynamic which makes static techniques inapplicable or inaccurate. Another al...

The goal of this task is to push the research frontier towards hybrid information systems. We aim to promote systems and approaches that are able to deal with the whole diversity of the Web, especially for, but not restricted to, the context of bio-medicine. This goal is pursued by the organization of challenges. The second challenge consisted of two tasks: semantic indexing and question answer...

We investigate the robustness of Case Initialized Genetic AlgoRithm (CIGAR) systems with respect problem indexing. When confronted with a series of similar problems CIGAR stores potential solutions in a case-base or an associative memory and retrieves and uses these solutions to help improve a genetic algorithm’s performance over time. Defining similarity among the problems, or indexing, is key...

An aging population and the economic crisis have placed pay-as-you-go pension systems in need of mechanisms to ensure their financial stability. In this article, we consider optimal indexing pensions as an instrument cope with imbalances typically found these systems. Using dynamic programming techniques a stochastic continuous-time framework, compute index portfolio strategy that best target l...