1,613 research outputs found
Generating time series reference models based on event analysis
Creating a reference model that represents a given set of time series is a relevant problem as it can be applied to a wide range of tasks like diagnosis, decision support, fraud detection, etc. In some domains, like seismography or medicine, the relevant information contained in the time series is concentrated in short periods of time called events. In this paper, we propose a technique for generating time series reference models based on the analysis of the events they contain. The proposed technique has been applied to time series from two medical domains: Electroencephalography, a neurological procedure to record the electrical activity produced by the brain and Stabilometry, a branch of medicine studying balance-related functions in human beings
Retaules catalans del barroc tardà : algunes consideracions
La darrera renovació tipològica del retaule barroc a Catalunya, vers un barroc tardà o classicista, es troba relacionada amb les corrents europees igual que en altres indrets d'Espanya i es produeix també per els mateixos anys, vers 1720. Tractem també la contribució d'alguns escultors catalans en aquest canvi: Jacint Moretó, Pere Costa i Josep Sunyer i descartem que en aquest procés s'hi trobi un sol escultor, Pere Costa, així com la interpretació de les fonts que s'han utilitzat per recolzar-ho.The last renovation in the structure of the baroque altarpiece in Catalonia takes place around 1720. It evolves towards a late baroque or classicist style and it connects with the trends in Europe and elsewhere in Spain around the same date. We also study the contribution of Catalan sculptors such as Jacint Moretó, Pere Costa and Josep Sunyer to this change, because we don't think that Pere Costa is the only sculptor connected to this process. We therefore disagree with the interpretation ot the sources that supports this theory
Accesibilidad Web
Muchos sitios Web tienen un importante problema de accesibilidad, ya que su diseño no ha contemplado la gran diversidad funcional que presentan cada uno de los potenciales usuarios. Las directrices de accesibilidad del contenido Web, desarrolladas por el Consorcio de la Web, están compuestas por una serie de recomendaciones para que una página Web pueda utilizarse por cualquier persona. Uno de los principales problemas surge a la hora de comprobar la accesibilidad de una página Web, dado que, a pesar de la existencia de herramientas de revisión, no resulta viable realizar una validación completamente automática; para ello, se presenta la herramienta HERA para la revisión semiautomática de la accesibilidad a la Web
Two Different Approaches of Feature Extraction for Classifying the EEG Signals
The electroencephalograph (EEG) signal is one of the most widely used signals in the biomedicine field due to its rich information about human tasks. This research study describes a new approach based on i) build reference models from a set of time series, based on the analysis of the events that they contain, is suitable for domains where the relevant information is concentrated in specific regions of the time series, known as events. In order to deal with events, each event is characterized by a set of attributes. ii) Discrete wavelet transform to the EEG data in order to extract temporal information in the form of changes in the frequency domain over time- that is they are able to extract non-stationary signals embedded in the noisy background of the human brain.
The performance of the model was evaluated in terms of training performance and classification accuracies and the results confirmed that the proposed scheme has potential in classifying the EEG signals
Proposed safeguards for the independence of the internal audit function
La presente investigación tiene por objetivo proponer un conjunto de salvaguardas que sirva de referencia
a auditores internos y entidades, con el fin de garantizar la existencia de independencia en la función
de auditoría interna. Para conseguir este objetivo se aplicó el método Delphi. Los principales resultados
obtenidos evidencian que no existen opiniones diferentes por grupos de expertos sobre la importancia
de las salvaguardas, pudiéndose proponer un uniforme conjunto de salvaguardas, con la excepción de
la externalización de la función de auditoría interna, la cual, según el grupo de auditores internos, es
considerada como la menos importante. La independencia sobre las actividades y los sistemas de control
interno es la salvaguarda considerada de forma unánime como la más importanteThe present document has as its aim to propose a set of safeguards that may be used as a reference for
internal and regulatory auditors and entities, in order to ensure the independence in this function. To
obtain this aim, the applied research Delphi method was used. The results obtained demonstrated that
there was no difference of opinion between experts on the importance of the safeguards. Thus, a uniform
set of safeguards can be proposed, with the exception of the outsourcing of the function of internal
audit, it being considered to be less important for the group of internal auditors. The independence of
auditing activities and the internal control systems was unanimously considered to be the most important
safeguard
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