Search results for "Online"
showing 10 items of 4526 documents
ONLINE SOCIAL COMPARISON ITS ROLE IN PREDICTING INDIVIDUALS’ WELL-BEING
2023
Social comparison is the practice through which people compare their own opinions, abilities, behaviours, and emotions with those of others as an external guide and a source for self-evaluation. Social comparison has been put forward as a core feature of interpersonal relationships both in the offline context and in virtual interactions through social media. A growing number of studies has highlighted that online social comparison through social media can influence individuals’ everyday life. In this thesis, I will examine the role of online social comparison in influencing individuals’ well-being in three research designs with different outcomes. In the first empirical study, a cross-lagge…
Well-posedness of Prandtl equations with non-compatible data
2013
In this paper we shall be concerned with Prandtl's equations with incompatible data, i.e. with initial data that, in general, do not fulfil the boundary conditions imposed on the solution. Under the hypothesis of analyticity in the streamwise variable, we shall prove that Prandtl's equations, on the half-plane or on the half-space, are well posed for a short time.
Well-posedness of a nonlinear evolution equation arising in growing cell population
2011
We prove that a nonlinear evolution equation which comes from a model of an age-structured cell population endowed with general reproduction laws is well-posed. Copyright © 2011 John Wiley & Sons, Ltd.
On the classification of type D space–times
2002
We give a classification of the type D spacetimes based on the invariant differential properties of the Weyl principal structure. Our classification is established using tensorial invariants of the Weyl tensor and, consequently, besides its intrinsic nature, it is valid for the whole set of the type D metrics and it applies on both, vacuum and non-vacuum solutions. We consider the Cotton-zero type D metrics and we study the classes that are compatible with this condition. The subfamily of spacetimes with constant argument of the Weyl eigenvalue is analyzed in more detail by offering a canonical expression for the metric tensor and by giving a generalization of some results about the non-exi…
Nonlinear evolution of cosmological inhomogeneities
2008
The nonlinear evolution of a cosmologically significant fluid is studied up to shell crossing. The magnetic part of the Weyl tensor, the pressure and the vorticity vanish. A suitable spatial grid is chosen. The relativistic Ellis equations are particularized on the world lines defined by the nodes of the grid and, then, the resulting equations are numerically solved. The integrations are performed in suitable Lagrangian inertial coordinates, in which the differential equations become ordinary. After the integration, a method to change from Lagrangian to Eulerian coordinates is applied. This approach has been outlined with the essential aim of studying the evolution of large scale cosmologic…
FLIGHT CONTROL RESEARCH LABORATORY UNMANNED AERIAL SYSTEM WIND SHEAR ON-LINE IDENTIFICATION
2013
An algorithm to perform the on line identification of the wind shear components suitable for the UAS characteristics has been implemented. The mathematical model of aircraft and wind shear in the augmented state space has been built without any restrictive assumption on the dynamic of wind shear. Because of the strong velocity variations typical of wind shear induce severe accelerations on the aircraft the wind shear effects have been modeled as external forces and moments applied on the aircraft. The identification problem addressed in this work has been solved by using the Filter error method approach. An Extended Kalman Filter has been developed to propagate state. It has been tuned by u…
Relations between multi-resolution analysis and quantum mechanics
2005
We discuss a procedure to construct multiresolution analyses (MRA) of L2 (R) starting from a given seed function h (s) which should satisfy some conditions. Our method, originally related to the quantum mechanical Hamiltonian of the fractional quantum Hall effect, is shown to be model independent. The role of a canonical map between certain canonically conjugate operators is discussed. This clarifies our previous procedure and makes much easier most of the original formulas, producing a convenient framework to produce examples of MRA. © 2005 American Institute of Physics.
Donne&Diritti sul Web. Guida alle risorse online. Dossier tematico
2012
Il dossier, diviso in categorie tese a riflettere la sistematizzazione tradizionale delle risorse online utili alla ricerca storica tout court (banche dati bibliografiche, bibliografie e cataloghi online, fonti primarie, periodici elettronici, corsi e materiali per l’insegnamento, portali, ricerche e progetti) offre una panoramica delle risorse online (italiane e straniere) nell'ambito della storia della condizione giuridica delle donne. Progettato per aiutare nella ricerca e nel reperimento di informazioni e fonti, propone un percorso ragionato che consente l’accesso ad alcune tra le interessanti risorse relative allo studio, la conservazione, la diffusione di documentazione e altri materi…
Does social climate influence positive eWOM? A study of heavy-users of online communities.
2018
Abstract This paper provides a deeper understanding of the role of social influences on positive eWOM behaviour (PeWOM) of heavy-users of online communities. Drawing on Social Interaction Utility Framework, Group Marketing and Social Learning Theories, we develop and test a research model integrating the interactions between the social climate of a website and Interpersonal Influences in PeWOM. 262 Spanish heavy-users of online communities were selected and the data analysed using partial least squares equation modelling. Overall, the model explains 59% of the variance of PeWOM on online communities. Findings reveal that interaction with other members of the online community (Social Presenc…
Innovación docente y TIC desde la perspectiva de la docencia en Derecho
2020
Las tecnologías de la información y la comunicación son un elemento extraordinario para innovar en el ámbito educativo, tal y como ha mostrado la situación generada por el COVID-19. Así, en el ámbito del Derecho son múltiples las posibilidades que se derivan de la implementación de estas herramientas para mejorar el nivel de la enseñanza y facilitar la incorporación de los estudiantes al mundo laboral. Ahora bien, la tecnología no es un fin en sí mismo, por lo que habrá que valorar la introducción de estas herramientas como complemento y no como un sustitutivo de la tarea educativa, especialmente en el ámbito del Derecho, que exige la formación de juristas con una visión integral de la real…