Search results for "Online"
showing 10 items of 4526 documents
Pattern formation in hyperbolic reaction-transport systems and applications to dryland ecology
2023
Pattern formation and modulation is an active branch of mathematics, not only from the perspective of fundamental theory but also for its huge applications in many fields of physics, ecology, chemistry, biology, and other sciences. In this thesis, the occurrence of Turing and wave instabilities, giving rise to stationary and oscillatory patterns, respectively, is theoretically investigated by means of two-compartment reaction-transport hyperbolic systems. The goal is to elucidate the role of inertial times, which are introduced in hyperbolic models to account for the finite-time propagation of disturbances, in stationary and transient dynamics, in supercritical and subcritical regimes. In p…
Rakstveida sarunu iezīmes tiešsaistes diskusiju forumos
2017
Pastāv dažādas komunikācijas formas un viena no tām ir digitālā komunikācija. Ziņu sūtīšana un saņemšana notiek digitālā vidē, kur valda īpaši noteikumi, nerakstīti likumi, kur valodas stila pielietojums atšķiras gan funkcionāli, gan pēc tipiskā satura. Digitālā valoda tiek identificēta kā “rakstveida saruna”, jo tā balstās, izmantojot rakstu kodu un sarunvalodas dinamiskās īpašības. Sociālajos forumos ziņu apmaiņa noris caur t.s. diskusiju pavedieniem, kas dod iespēju parādīt dalībnieku iejaukšanos pēc tā veida, kas tiek izteikta un mērīta kā reakcija vienam uz otru. Šī pētījuma mērķis ir noskaidrot, kāda veida iejaukšanās dominē diskusiju forumos tīmekļa vietnē “Doctissimo.fr”? Darba auto…
Capturing the Severity and Impairment Associated With Depression: The Overall Depression Severity and Impairment Scale (ODSIS) Validation in a Spanis…
2019
Background: The Overall Depression Severity and Impairment Scale (ODSIS) is a self-report scale designed to evaluate the severity and functional impairment associated with depression. Objective: This study evaluated the psychometric properties of the online version of the ODSIS in Spanish outpatients with depression and anxiety disorders. Method: Patients with a main diagnosis of a depressive (n = 283) or anxiety disorder (n = 191) and a mean age of 38.15 (SD = 12.06) were evaluated with a clinical diagnostic interview and measures assessing depression, anxiety, positive and negative affect, and quality of life. Factorial structure, internal consistency, convergent, and discriminant validit…
Spectral dynamics of incoherent waves with a noninstantaneous nonlinear response
2013
We study the influence of a constant background noise on the dynamics of spectral incoherent solitons, which are incoherent structures sustained by a noninstantaneous (Raman-like) nonlinearity. As the level of the noise background increases, the incoherent wave enters a novel nonlinear regime characterized by oscillatory dynamics of the incoherent spectrum, which develop within a spectral cone during the propagation. In contrast to the conventional Raman-like spectral red shift, such incoherent spectral dynamics can be characterized by a significant spectral blue shift. On the basis of the kinetic wave theory, we derive explicit analytical expressions of these incoherent oscillatory spectra…
Personas mayores en riesgo: uso del preservativo ante las infidelidades
2019
Si bien las infecciones de transmisión sexual suelen relacionarse con etapas evolutivas tempranas, estudios recientes ponen el foco de atención en la población más mayor. Sin embargo, pocos esfuerzos centran su atención en dicho colectivo, entre otros motivos, por la propia invisibilización de su sexualidad. Esto ocurre todavía más, cuando se trata de conductas penalizadas socialmente, como sería el caso de la infidelidad. Por este motivo, el presente estudio busca analizar la conducta de uso del preservativo en personas mayores, en el contexto de la infidelidad, así como el papel que podrían jugar variables psicológicas y nuevos contextos sexuales, como internet. Para ello, 244 personas (4…
Efectos de las consultas boca a boca en redes sociales en la compra de cosméticos en Ecuador.
2022
Las redes sociales han reestructurado el paradigma de la comunicación en el marketing. Investigaciones recientes demuestran que la conducta de consultar reseñas está adquiriendo un rol fundamental en la decisión de compra de los consumidores. En este contexto, el presente estudio desarrolló un marco de investigación para determinar la cadena de relación entre influencia social, credibilidad percibida del boca a boca, adopción del boca a boca e intención de compra aplicada a la industria cosmética del Ecuador. A través de una muestra de 406 consumidores y la aplicación del método de análisis de ecuaciones estructurales, los resultados evidencian el vínculo existente entre las variables plant…
Age Differences in Technology Readiness and Its Effects on Information System Acceptance and Use : The Case of Online Electricity Services in Finland
2017
Although technology readiness (TR) has been found to influence the acceptance and use of information systems (IS), little is known about how TR varies in terms of different demographic variables and how these demographic variables moderate the effects of TR on IS acceptance and use. In this study, we aim to address this gap in prior research by examining the potential age differences in the four technology readiness index (TRI) constructs as well as their effects on IS use intention and its two main antecedents hypothesised in the technology acceptance model (TAM): perceived usefulness and perceived ease of use. The examination is conducted in the context of online electricity services and …
Feedback Linearizing Control of Induction Motor Considering Magnetic Saturation Effects
2015
This paper presents an input-output feedback linearization (FL) control technique for rotating induction motors, which takes into consideration the magnetic saturation of the iron core. Starting from a new formulation of the dynamic model taking into consideration the magnetic saturation expressed in a space-state form in the rotor-flux-oriented reference frame, the corresponding FL technique has been developed. To this aim, a particular care has been given to the choice of nonlinear functions interpolating the magnetic parameters versus the rotor magnetizing current and the corresponding magnetic characteristic. The proposed FL technique has been tested experimentally on a suitably develop…
Conflicting legitimations and pressures in performance measurement adoption, use and change in Finnish municipalities
2010
Lessons learned on student engagement from the nature of pervasive socio‐digital interests and related network participation of adolescents
2021
The rise of modern socio-digital technologies has fundamentally changed the everyday environments in which young people communicate with each other and cultivate interests. To gain a more sophisticated understanding of this phenomenon, this study provides in-depth, qualitative insights into adolescents’ experiences of their socio-digital developmental ecologies. The 15 interview participants were recruited based on a previously conducted questionnaire. The semi-structured theme interview addressed the socio-digital aspects of the participants’ interest-driven behaviours and related networks with the aid of participant-generated egocentric maps. The data not only qualitatively enrich the pic…