Search results for "ICAC"
showing 10 items of 3727 documents
Supporting scalable video transmission in MANETs through distributed admission control mechanisms
2009
Emerging multimedia applications over mobile devices are becoming very popular, especially over infrastructure wireless networks such as cellular and WLANs. However, providing this kind of services over infrastructureless networks like ad hoc networks presents many additional problems. One of these problems is how to share resources fairly among the users involved. In this article we propose a QoS framework supporting scalable video streaming in mobile ad hoc networks based on distributed admission control and video traffic awareness. Our framework promotes fairness between video flows in terms of resource consumption. It also guarantees a significant reduction of the idle times experienced…
Experimental characterization and mitigation of turbulence induced signal fades within an ad hoc FSO network
2014
Optical beams propagating through the turbulent atmospheric channel suffer from both the attenuation and phase distortion. Since future wireless networks are envisaged to be deployed in the ad hoc mesh topology, this paper presents the experimental laboratory characterization of mitigation of turbulence induced signal fades for two ad hoc scenarios. Results from measurements of the thermal structure constant along the propagation channels, changes of the coherence lengths for different turbulence regimes and the eye diagrams for partially correlated turbulences in free space optical channels are discussed. Based on these results future deployment of optical ad hoc networks can be more strai…
Incidencia de comunicación bucosinusal tras la extracción de 389 terceros molares superiores
2006
Podeu consultar la versió en anglès a http://hdl.handle.net/2445/117330
Answering Schrödinger's "What Is Life?"
2020
In his &ldquo
Optimal passive-damping design using a decentralized velocity-feedback H-infinity approach
2012
In this work, a new strategy to design passive energy dissipation systems for vibration control of large structures is presented. The method is based on the equivalence between passive damping systems and fully decentralized static velocity-feedback controllers. This equivalence allows to take advantage of recent developments in static output-feedback control design to formulate the passive-damping design as a single optimization problem with Linear Matrix Inequality constraints. To illustrate the application of the proposed methodology, a passive damping system is designed for the seismic protection of a five-story building with excellent results. Peer Reviewed
Escala de Utrecht de implicación en el trabajo en los profesores dominicanos: dimensionalidad, fiabilidad y validez
2018
ABSTRACT Work engagement is described by dedication, vigor, and absorption. The most widely used measure of engagement is the Utrecht Work Engagement Scale (UWES), intended to measure engagement for any occupational group. This research aims to study psychometric properties of the UWES for its use in the Dominican Republic and other Caribbean Spanish-speaking countries. The Composite Reliability Index (CRI) as well as alphas were calculated, indicating good internal consistency. Confirmatory factor analyses were carried out to test its dimensionality. Both tested models showed extremely good fit to the data, which called for model comparison. The three-factor solution was retained as the on…
Model of psychosocial intervention in organizations opposed to job stress: operational strategy
2009
Artículos originales [ES] El artículo presenta un modelo de actuación frente a los factores de riesgo psicosociales derivados del estrés laboral. Primeramente relaciona los principales efectos que ocasiona en toda organización el estrés laboral. Al mismo tiempo establece sus prioridades de actuación, para acto seguido indicar las actividades que deben ejecutarse. Dentro de esta fase de actuación, diferencia aquellas que van dirigidas a la organización de forma colectiva, cuya prioridad es manifiesta, frente a las acciones que deben ofrecerse a los afectados de forma individualizada. Así pues, se trata de un modelo de intervención que interactúa tanto en las medidas organizativas generales c…
Pressure-Driven Isostructural Phase Transition in InNbO4: In Situ Experimental and Theoretical Investigations
2017
[EN] The high-pressure behavior of technologically important visible-light photocatalytic semiconductor In.NbO4, adopting a monoclinic wolframite-type structure at ambient conditions, was investigated using synchrotron-based X-ray diffraction, Raman spectroscopic measurements, and first-principles calculations. The experimental results indicate the occurrence of a pressure-induced isostructural phase transition in the studied compound beyond 10.8 GPa. The large volume collapse associated with the phase transition and the coexistence of two phases observed over a wide range of pressure shows the nature of transition to be first-order. There is an increase in the oxygen anion coordination num…
El uso político de Twitter en la campaña de las Elecciones Locales de 2015 en la ciudad de València
2020
La investigación analiza el uso político de Twitter en la campaña de las Elecciones Locales de 2015 en la ciudad de Valencia. El trabajo realiza una comparación de la presencia y de la actividad en dicha red de microblogging de las cinco formaciones políticas que obtuvieron representación en la corporación municipal (el Partido Popular, Compromís, Ciudadanos, PSPV-PSOE y València en Comú) y sus respectivos candidatos (Rita Barberá, Joan Ribó, Fernando Giner, Joan Calabuig y Jordi Peris). Lo hace mediante una metodología de análisis cuantitativo ya consolidada y que resulta especialmente conveniente para documentar la progresiva implantación de las aportaciones potenciales de la comunicación…
Información y mensajes sobre salud en los medios de comunicación
2019
El grupo de investigación ScienceFlows ha llevado a cabo numerosos estudios sobre los discursos que se difunden a través de los medios de comunicación y de las redes sociales, que han permitido identificar cuál es la construcción mediática de la salud. Así, se ha identificado el tono de las informaciones (favorables, desfavorable, neutro); se ha cuantificado el volumen de información publicada en los diarios digitales; se ha estudiado cómo se producen los accesos a Internet por parte de los usuarios para solicitar información; y se han analizado los vídeos que se suben a YouTube sobre temas de salud.