Search results for " symbols"
showing 10 items of 37 documents
Maturational effects on newborn ERPs measured in the mismatch negativity paradigm.
2003
Abstract The mismatch negativity (MMN) component of event-related potentials (ERPs), a measure of passive change detection, is suggested to develop early in comparison to other ERP components, and an MMN-like response has been measured even from preterm infants. The MMN response in adults is negative in polarity at about 150–200 ms. However, the response measured in a typical MMN paradigm can also be markedly different in newborns, even opposite in polarity. This has been suggested to be related to maturational factors. To verify that suggestion, we measured ERPs of 21 newborns during quiet sleep to rarely occurring deviant tones of 1100 Hz (probability 12%) embedded among repeated standard…
Lautsi contra Italia: sobre la libertad religiosa y los deberes de neutralidad e imparcialidad del Estado.
2011
RESUMENRecientemente, la Gran Sala del Tribunal Europeo de Derechos Humanos ha resuelto que la presencia del crucifijo en las aulas italianas no supone una vulneración del derecho de los padres a asegurar la educación de sus hijos de conformidad con sus propias creencias religiosas y de los deberes de neutralidad e imparcialidad estatal impuestos por el derecho de libertad religiosa. Con ello revocaba una decisión en sentido contrario de una Sala de la Sección Segunda del propio tribunal. En el trabajo se repasan críticamente los fundamentos de la decisión definitiva, basada principalmente en el reconocimiento de un amplio margen de discrecionalidad en la actuación de las autoridades nacion…
Historischer Überblick zur mathematischen Theorie von Unstetigkeitswellen seit Riemann und Christoffel
1981
We give a brief historical account of the development of the mathematical theory of propagation of discontinuities in gases, fluids or elastic materials. The theory was initiated by Riemann who investigated the propagation of shocks in one-dimensional isentropic gas flow. Riemann’s results were used by Christoffel to treat, more generally, the propagation of (first order) discontinuity surfaces in three-dimensional flows of perfect fluids. Subsequently Christoffel applied his general theory to first order waves in certain elastic materials. Independently of Riemann and Christoffel significant contributions were made by Hugoniot. The theory was completed in Hadamard’s celebrated monograph [3…
The Riemannian manifold of all Riemannian metrics
1991
In this paper we study the geometry of (M, G) by using the ideas developed in [Michor, 1980]. With that differentiable structure on M it is possible to use variational principles and so we start in section 2 by computing geodesics as the curves in M minimizing the energy functional. From the geodesic equation, the covariant derivative of the Levi-Civita connection can be obtained, and that provides a direct method for computing the curvature of the manifold. Christoffel symbol and curvature turn out to be pointwise in M and so, although the mappings involved in the definition of the Ricci tensor and the scalar curvature have no trace, in our case we can define the concepts of ”Ricci like cu…
Cosa può dirci l’antico. Spazi, forme e funzioni dei pellegrinaggi cristiani “minori”
2016
In questa sede si pone attenzione, osservando alcuni pellegrinaggi cristiani definibili come “minori”, ad alcune questioni relative alle relazioni tra ambiente, società e luoghi sacri, alle funzioni rivestite dall’itinerario pellegrinale in rapporto alla diversa composizione delle “comunità di pellegrinaggio” e alle ragioni “religiose” che hanno potuto sostenere la continuità di frequentazione dei luoghi di culto e il reiterarsi di certe pratiche rituali. Nonostante le trasformazioni socio-culturali, il mutare delle aspettative esistenziali dei fedeli, dei sistemi di produzione, dei regimi alimentari, della consistenza demografica, il pellegrinaggio resta, infatti, un istituto religioso dif…
Analytic Bergman operators in the semiclassical limit
2018
Transposing the Berezin quantization into the setting of analytic microlocal analysis, we construct approximate semiclassical Bergman projections on weighted $L^2$ spaces with analytic weights, and show that their kernel functions admit an asymptotic expansion in the class of analytic symbols. As a corollary, we obtain new estimates for asymptotic expansions of the Bergman kernel on $\mathbb{C}^n$ and for high powers of ample holomorphic line bundles over compact complex manifolds.
La presencia de representaciones visuales de contenido religioso en la escuela pública constitucionalmente laica: un estudio exploratorio en aulas de…
2016
espanolUna de las manifestaciones que genera confusion en el marco de la relacion entre el Estado Laico, el principio de neutralidad y el ejercicio del derecho a la educacion, es la presencia de simbolos religiosos en la escuela publica. El objetivo del estudio es analizar, a traves de un sistema cuantitativo y cualitativo, la representacion de las figuras humanas con contenido religioso en diez aulas de educacion infantil de colegios publicos de una ciudad capital. En la mitad de colegios visitados existe presencia de figuras humanas con contenido religioso. Se observa una transformacion del discurso que sobrepasa la representacion del crucifijo. Los mensajes distorsionan el principio de n…
Within the symbolic world of the prehistoric hunters: A GIS-based and 3D model analysis of sites with complexes of linear incisions in western Sicily
2021
Abstract The prehistoric peopling of Sicily has left scattered traces of symbolic activities through well-known rock art expressions in caves and rock shelters located all around the island (among the most significant, the sites of Addaura, Racchio and Genovese). A peculiar phenomenon is the incision of linear signs, often grouped on the same rocky walls, hidden in fissures or placed at the entrance of the underground chambers of caves. In this report, we investigate a sample of these graphic expressions from a spatial and technical point of view. A GIS-based approach presents the territorial pattern providing insight, on a macroscale, into the intentional positioning of the sign complexes.…
The Eighteenth-century Opera and the Search for a Meeting Point between Music and Declamation
2019
The article is the result of some researches about the ideas on the operatic reform appeared in Italy and France from 1740s onwards. On the basis of acting, some treatises written by actors, philosophers and musicographers claim the dramatic superiority of recitativo secco or obbligato, and the beauty of aria parlante. (e.g., L. Riccoboni, Dell’arte rappresentativa, 1728, G. Manfredi, L’attore in scena, 1734, G. R. Carli, L’indole del teatro tragico, 1746, and Osservazioni sulla musica antica e moderna, 1744-1786, G. Tartini, Trattato di musica secondo la vera scienza dell’armonia, 1754, F. Algarotti, Saggio sopra l’opera in musica, 1755). Owing to its particular speaking tone linked to dec…
Gli occhi, il fuoco, il grano. Simboli, pratiche e credenze tradizionali nel culto di santa Lucia di Siracusa
2020
The folkloric traditions related to Saint Lucia of Syracuse are characterized, in Sicily as well as elsewhere in Italy, by a peculiar mythical-ritual symbolism. The eyes, fire, wheat are the main elements. The Saint is invoked to solve the problems of sight and all ophthalmic pathologies (both in a cult context and in a magical-medical one) and as such she is the recipient of ex voto objects and the protagonist of prayers and spells. On the eve of her dies natalis, bonfires are lit and processions of torches take place; for her festival, celebrated in some centers with solemn functions and processions, foods based on wheat seeds, sometimes added with other legumes, are widely prepared. This…