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Solar M.,Federico Santa María Technical University | Meijueiro L.,Fundacion CTIC | Daniels F.,Inter american Organization for Higher Education OUI IOHE
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | Year: 2013

This article presents a guide to implement open data in Public Agencies (PAs). The guide is the result of a worldwide proposal's study, of the application of a maturity model to diagnose the situation of PAs in Latin American countries, the opinion of experts in different excellence centers, e-government authorities, and developers of open data application in the world. The guide is simple and orients decision makers so that PAs following the actions of the guide can see their capacities improved when facing a diagnosis of their institutional maturity in implementation of open data. © 2013 IFIP International Federation for Information Processing.


Rubiera E.,Fundacion CTIC | Polo L.,Fundacion CTIC | Berrueta D.,Fundacion CTIC | El Ghali A.,IBM
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | Year: 2012

This paper proposes the application of the RDF framework to the representation of linguistic annotations. We argue that RDF is a suitable data model to capture multiple annotations on the same text segment, and to integrate multiple layers of annotations. As well as using RDF for this purpose, the main contribution of the paper is an OWL ontology, called TELIX (Text Encoding and Linguistic Information eXchange), which models annotation content. This ontology builds on the SKOS XL vocabulary, a W3C standard for representation of lexical entities as RDF graphs. We extend SKOS XL in order to capture lexical relations between words (e.g., synonymy), as well as to support word sense disambiguation, morphological features and syntactic analysis, among others. In addition, a formal mapping of feature structures to RDF graphs is defined, enabling complex composition of linguistic entities. Finally, the paper also suggests the use of RDFa as a convenient syntax that combines source texts and linguistic annotations in the same file. © 2012 Springer-Verlag.


Alvarez J.M.,University of Oviedo | Polo L.,Fundacion CTIC | Jimenez W.,University of Oviedo | Abella P.,University of Oviedo | Labra J.E.,University of Oviedo
2011 ACM Conference on Bioinformatics, Computational Biology and Biomedicine, BCB 2011 | Year: 2011

The aim of this paper is to present the application of the Spreading Activation Technique in the scope of medical systems. This technique is implemented through the ONTOSPREAD framework for the development, configuration, customization and execution of the Spreading Activation technique over graph-based structures, more specifically over RDF graphs and ontologies arising from the Semantic Web area. It has been used to the efficient exploration and querying of large and heterogeneous knowledge bases based on semantic networks in the Information and Document Retrieval domains. ONTOSPREAD implements the double process of activation and spreading of concepts in ontologies applying different restrictions of the original model like weight degradation according to the distance or others coming from the extension of this technique like the converging paths reward. It is considered to be relevant to support the recommendation of concepts for tagging clinical records and to provide a tool for decision-support in clinical diagnosis. Finally an evaluation methodology and two examples using the well-known ontologies Galen and SNOMED CT are presented to validate the goodness, the improvement and the capabilities of this technique applied to medical systems. Copyright © 2011 ACM.


Tejo-Alonso C.,Fundacion CTIC | Berrueta D.,Fundacion CTIC | Polo L.,Fundacion CTIC | Fernandez S.,Fundacion CTIC
International Journal of Metadata, Semantics and Ontologies | Year: 2012

The Semantic Web contains a number of knowledge artifacts, including OWL ontologies, RIF rule sets and Resource Description Framework data sets. Effective exchange and management of these artifacts demands the use of metadata and prompt availability of accurate reference documentation. In this paper, we analyse the current practices in metadata usage for OWL ontologies and we propose a vocabulary for annotating RIF rules. We also introduce a software tool -Parrot- that exploits these annotations and produces reference documentation for combinations of ontologies and rules. Copyright © 2012 Inderscience Enterprises Ltd.


San Martin L.A.,Fundacion CTIC | Pelaez V.M.,Fundacion CTIC | Gonzalez R.,Fundacion CTIC | Campos A.,Fundacion CTIC | Lobato V.,Fundacion CTIC
Journal of Ambient Intelligence and Smart Environments | Year: 2010

The ubiquitous computing concept was introduced by Weiser in 1991. Despite the many advances since then, the use of ubiquitous spaces is not yet widespread in home environments, due to the difficulty in using context information and artificial intelligence algorithms. This work combines context-management architecture and machine-learning techniques to infer environmental user preferences automatically. Context information is represented with ontologies and the system is organized through a service-oriented architecture. The system learns all the parameters that the user configures in the home. These parameters are taken as the users' preferences and will be learned automatically by means of an algorithm based on the KNN machine learning algorithm. These preferences will enable the development of context-aware applications for the home environment that will proactively adjust, depending on the learned values and the context. These kinds of applications will further the concept of ambient-assisted living and, hence, aid in improving quality of life in the home. © 2010-IOS Press and the authors. All rights reserved.


Fernandez S.,Fundacion CTIC | Berrueta D.,Fundacion CTIC | Rodriguez M.G.,University of Oviedo | Labra J.E.,University of Oviedo
ICSOFT 2010 - Proceedings of the 5th International Conference on Software and Data Technologies | Year: 2010

Data management is a key factor in any software effort. Traditional solutions, such as relational databases, are rapidly losing weight in the market towards more flexible approaches and data models due to the fact that data stores as monolithic components are not valid in many current scenarios. The World Wide Consortium proposes RDF as a suitable framework for modeling, describing and linking resources on the Web. Unfortunately the current methods to access to RDF data can be considered a kind of handcrafted work. Therefore the Trioo project aims to provide powerful and flexible methods to access RDF datasets from object-oriented programming languages, allowing the usage of this data without negative influences in object-oriented designs and trying to keep the semantics of data as accurate as possible.


Tejo-Alonso C.,Fundacion CTIC | Berrueta D.,Fundacion CTIC | Polo L.,Fundacion CTIC | Fernandez S.,Fundacion CTIC
Communications in Computer and Information Science | Year: 2011

The Semantic Web contains a number of different knowledge artifacts, including OWL ontologies, RIF rule sets and RDF datasets. Effective exchange and management of these artifacts demand the use of metadata and prompt availability of accurate reference documentation. In this paper, we analyze the current practices in metadata usage for OWL ontologies, and we propose a vocabulary for annotating RIF rules. We also introduce a software tool -Parrot- that exploits these annotations and produces reference documentation for combinations of ontologies and rules. © 2011 Springer-Verlag.


Rodriguez M.G.,University of Oviedo | Rodriguez J.M.A.,University of Oviedo | Munoz D.B.,Fundacion CTIC | Paredes L.P.,Fundacion CTIC | And 2 more authors.
Journal of Universal Computer Science | Year: 2012

Grounding is the process in charge of linking requests and responses of web services with the semantic web services execution platform, and it is the key activity to automate their execution in a real business environment. In this paper, the authors introduce a practical solution for data grounding. On the one hand, we need a mapping language to relate data structures from services definition in WSDL documents to concepts, properties and instances of a business domain. On the other hand, two functions that perform the lowering and lifting processes using these mapping specifications are also presented. © J.UCS.


Alvarez Alvarez E.,Fundacion CTIC | Campos Lopez A.M.,Fundacion CTIC | Gutierrez-Trashorras A.J.,University of Oviedo
Journal of Renewable and Sustainable Energy | Year: 2012

This paper presents the active power dispatching of microsources, as an on-line minimization problem, including electrical and heat generation costs. The use of a new algorithm: on-line cost-function based control algorithm for microgrids (OCCAM), makes it possible to obtain similar or even better solutions than those obtained using other state of the art methods like MADS and SQP. Moreover, its execution time is about one hundred times lower than the time needed by other algorithms and it can run efficiently on-line. OCCAM is based on the same principle as the famous William Occam's razor: the simplest explanation is most likely the correct one; its simplicity is the reason for its low execution time. It uses costs functions of microsources and heat savings (obtained by recovering heat from microsources in cogeneration installations) to determine the optimal solution. © 2012 American Institute of Physics.


Alvarez E.,Fundacion CTIC | Campos A.M.,Fundacion CTIC | Arboleya P.,University of Oviedo | Gutierrez A.J.,University of Oviedo
International Journal of Electrical Power and Energy Systems | Year: 2012

A fast response algorithm has been developed for active-power dispatch to microsources in a distributed generation microgrid. It is capable of adjusting microgrid generation to demand on-line in grid-connected-mode. The algorithm performs an optimization of fuel consumption and emissions costs functions, of microsources using a heuristic approach. It and has been tested to solve different power dispatch cost optimization problems. The tests realized show a maximum execution time of about 1 ms, which is several orders of magnitude faster than the results obtained with other state-of-the-art optimization methods currently employed in these applications. It has also shown better performance in terms of global cost and microsources stability. The fast response implies a substantial reduction of the computational resources needed, allowing the use of a low-cost programmable logic controller or microcontroller for microsources active power dispatching. Thus, the infrastructure requirements and new investments are reduced and the penetration of microgrids based on renewable energies is improved. © 2012 Elsevier Ltd. All rights reserved.

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