Recerca: Enviaments recents
Ara mostrant els elements 1861-1880 de 2445
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Bases cerebrales de la atención sostenida y la memoria de trabajo: un estudio de resonancia magnética funcional basado en el Continuous Performance Test
(2014)Introducción. Uno de los paradigmas más utilizados en el estudio de la atención es el Continuous Performance Test (CPT). La versión de pares idénticos (CPT-IP) se ha utilizado ampliamente para evaluar ... -
Web didáctica para la aproximación de funciones mediante redes neuronales
(2002)In this article we presents a project [1] developed to demonstrate the capability that Multi-Layer Perceptrons (MLP) have to approximate non-linear functions [2]. The simulation has been implemented ... -
Improving Pitch Tracking Performance in Hard Noise Conditions by a Preprocessing Based on Mathematical Morphology
(2009)In this paper we show how a nonlinear preprocessing of speech signal -with high noise- based on morphological filters improves the performance of robust algorithms for pitch tracking (RAPT). This ... -
Exploring Non-linear Transformations for an Entropybased Voice Activity Detector
(2009)In this paper we explore the use of non-linear transformations in order to improve the performance of an entropy based voice activity detector (VAD). The idea of using a non-linear transformation comes ... -
On cumulant techniques in speech processing
(2009)This paper analyzes applications of cumulant analysis in speech processing. A special focus is made on different second-order statistics. A dominant role is played by an integral representation ... -
Effectiveness of a primary care-based intervention to reduce sitting time in overweight and obese patients (SEDESTACTIV): a randomized controlled trial; rationale and study design
(2014)Background: There is growing evidence suggesting that prolonged sitting has negative effects on people's weight, chronic diseases and mortality. Interventions to reduce sedentary time can be an effective ... -
Campus Móvil: Designing a Mobile Web 2.0 Startup for Higher Education Uses
(2010)In the intersection between the mobile Internet, social software and educational environments, Campus Móvil is a prototype of an online application for mobile devices created for a Spanish university ... -
Stochastic heuristic dynamic assignment based on AIMSUN microscopic traffic simulator
(2006)The deployment of intelligent transportation systems must be assisted by suitable tools to conduct the feasibility studies required to test the designs and evaluate the expected impacts. Microscopic ... -
Online brands: Branding, possible worlds, and interactive grammars
(2008)This paper proposes to reflect from a semiotic perspective on the transformation that brands have undergone since the rise of the Internet. After a brief theoretical introduction to digital communication ... -
Mapping conversations about new media: the theoretical field of digital communication
(2009)This article reflects on the current state of digital communication studies in the context of mass communication research. The objectives of the article are: 1) to characterize the enunciators and ... -
Interval censoring: identifiability and the constant-sum property
(2007)The constant-sum property given in Oller et al. (2004) for censoring models justifies the use of a simplified likelihood to obtain the nonparametric maximum likelihood estimator of the lifetime ... -
El Diseño de Diálogos de la Comunicación En Línea. Hacia una nueva gestión del Conocimiento Científico en la era del Software Social
(2007)Este artículo es un recorrido a través del proceso de diseño de Diálogos de la Comunicación versión en línea, un procedimiento que ha incluido diferentes fases: desde la fijación de objetivos hasta ... -
Transmedia Storytelling: Implicit Consumers, Narrative Worlds, and Branding in Contemporary Media Production
(2009)Many concepts have been developed to describe the convergence of media, languages, and formats in contemporary media systems. This article is a theoretical reflection on “transmedia storytelling” from ... -
Nonlinear prediction based on score function
(2002)The linear prediction coding of speech is based in the assumption that the generation model is autoregresive. In this paper we propose a structure to cope with the nonlinear effects presents in the ... -
Interval censoring: model characterizations for the validity of the simplified likelihood
(2004)En analyse de durées de vie, le problème de la censure par intervalle a généralement été traité par des méthodes vraisemblantistes. Comme la vraisemblance est complexe, on suppose souvent que les ... -
Distribución espacial de la población inmigrante en los municipios catalanes: igualdad, exposición, concentración y centralidad
(2006)Dado el importante crecimiento de la población inmigrante en España, es interesante estudiar su distribución sobre el territorio urbano. Desde la estadística se dispone de diferentes indicadores con ... -
Tutorial on methods for interval-censored data and their implementation in R
(2009)Interval censoring is encountered in many practical situations when the event of interest cannot be observed and it is only known to have occurred within a time window. The theory for the analysis of ...