Search results for "Redes"
showing 10 items of 223 documents
Análisis del aumento de seguidores y de la presencia multiplataforma de la clase política en Facebook, Twitter e Instagram en campañas electorales (2…
2022
[EN] The participation of politicians in social media is increasingly necessary in order to gain visibility. However, the logic of content dissemination is very different from conventional media. In social media, building a broad and varied base of followers facilitates a greater impact of the message. This article analyses the influence of various individual factors of the candidates on two aspects of the process: variation in the number of followers and multiplatform presence. Both issues are assessed on Facebook, Twitter, and Instagram in the context of three general elections held in Spain during the 2010s. The results show that the age and gender of the candidates, their frequency of p…
Predetermined for Predestination? On the Assumed Notion of Predestination in the Dead Sea Scrolls
2019
The present article argues that the concept of predestination does not on the whole lend itself to Qumran studies. Unlike the writings of Augustine and Calvin, the scrolls contain nothing like a do...
Ocnos : revista de estudios sobre lectura
2014
Este artículo documenta los espacios virtuales que congregan diariamente a cientos de adolescentes y jóvenes entre 13 y 29 años para hablar de libros, lectura y de autores. En estos espacios intercambian lecturas, reseñan sus relatos preferidos en sus blogs, debaten sobre si el narrador es adecuado para la narración o se quejan de cómo se trata la lectura en la escuela. La investigación se ha realizado a partir del estudio de dos casos: los foros de Laura Gallego y la campaña de promoción de venta del libro Delirium, de la Editorial SM, a través de los blogs administrados por los adolescentes y de las redes sociales Twitter y Facebook. Se han analizado 1.466 documentos de 452 sujetos para c…
Observer-based adaptive stabilization of a class of uncertain nonlinear systems
2014
In this paper, an adaptive output feedback stabilization method for a class of uncertain nonlinear systems is presented. Since this approach does not require any information about the bound of uncertainties, this information is not needed a priori and a mechanism for its estimation is exploited. The adaptation law is obtained using the Lyapunov direct method. Since all the states are not measurable, an observer is designed to estimate unmeasurable states for stabilization. Therefore, in the design procedure, first an observer is designed and then the control signal is constructed based on the estimated states and adaptation law with the σ-modification algorithm. The uniformly ultimately bou…
Analytic Exact Upper Bound for the Lyapunov Dimension of the Shimizu–Morioka System
2015
In applied investigations, the invariance of the Lyapunov dimension under a diffeomorphism is often used. However, in the case of irregular linearization, this fact was not strictly considered in the classical works. In the present work, the invariance of the Lyapunov dimension under diffeomorphism is demonstrated in the general case. This fact is used to obtain the analytic exact upper bound of the Lyapunov dimension of an attractor of the Shimizu–Morioka system. peerReviewed
Novel Stability Criteria for T--S Fuzzy Systems
2014
In this paper, novel stability conditions for Takagi-Sugeno (T-S) fuzzy systems are presented. The so-called nonquadratic membership-dependent Lyapunov function is first proposed, which is formulated in a higher order form of both the system states and the normalized membership functions than existing techniques in the literature. Then, new membership-dependent stability conditions are developed by the new Lyapunov function approach. It is shown that the conservativeness of the obtained criteria can be further reduced as the degree of the Lyapunov function increases. Two numerical examples are given to demonstrate the effectiveness and less conservativeness of the obtained theoretical resul…
Impulsive control on the synchronization for a class of chaotic Systems
2014
In this paper, the impulsive control problem on the synchronization for a class of chaotic systems is discussed. Based on Lyapunov stability theory, the new impulsive synchronization strategy is presented to realize the chaos synchronization and possesses the wider scope of application. Finally the numerical simulation examples are given to demonstrate the effectiveness of our theoretical results.
H<inf>&#x221E;</inf> controller design for the synchronization of a hyper-chaotic system
2013
In this paper, the robust control on the synchronization of a hyper-chaotic system is investigated. Based on Lyapunov stability theory and linear matrix inequality techniques, the multi-dimensional and the single-dimensional robust H∞ synchronization controllers are constructed for the possible application in practical engineering. Some numerical simulations are provided to demonstrate the effectiveness of the presented controllers.
Redescription and new records of the monotypic genus Trynocoris Herring, 1976 (Heteroptera: Miridae: Cylapinae: Fulviini).
2019
Trynocoris lawrencei Herring, the only representative of the genus Trynocoris and only known from Barro Colorado Island, Canal Zone, Panama, is recorded for the first time from Mexico, Nicaragua, Panama: Chinqui and Ecuador. Redescription of the genus and species are given along with color photographs of the adults, scanning electron micrographs of selected structures of T. lawrencei. Illustrations of the tarsi and male genitalia are presented for the first time.
CONSTRUCTION OF THE SOCIAL IMAGINARY OF ALTERNATIVE THERAPIES THROUGH DISCOURSE IN SOCIAL NETWORKS: CASE STUDY OF THE CHANNEL "ALTERNATIVE THERAPIES …
2019
Resumen: El objetivo de esta investigación es analizar cómo se construye el imaginario social de las terapias naturales, complementarias y alternativas a través de su discurso en redes sociales. Para ello, se ha escogido el canal temático “Terapias alternativas y remedios naturales” de la plataforma YouTube. Se ha realizado un análisis de contenido de dicho canal y se han examinado las sinergias con la página de Facebook, y el sitio web que se vinculan al mismo, con la finalidad de determinar si, además de contribuir en la difusión de estas terapias, existe una intencionalidad distinta. El periodo de análisis del canal temático ha sido de un año: desde julio de 2017 a julio de 2018. Se ha s…