122,631 research outputs found
Las colecciones sapienciales castellanas en el proceso de reafirmación del poder monárquico (siglos XII y XIV)
No full textBizzarri Hugo Oscar. Las colecciones sapienciales castellanas en el proceso de reafirmación del poder monárquico (siglos XII y XIV). In: Cahiers de linguistique hispanique médiévale. N°20, 1995. pp. 35-73
Danser parmi les œuvres d’art. Deux créations site-specific d’Hofesh Schechter et de Saburo Teshigawara
No full textWe will examine two recent site-specific dance creations: Hofesh Schechter’s Coda and Saburo Teshigawara’s Pointed Peak. The description of the experience of these performances for an “ethnographer” viewer will lead us to use the semiotic theories of corporality, of “perceptive” mediality, and the theory of intersemiotic translation, as well as the socio-semiotics of risk and interactions. The inter-sensory and intermedial translatability among different systems of meaning can be analyzed “below” the manifest level of the signs, namely in the conflict zone of the figural tensions. At a more global level, socio-semiotic interaction regimes explain performance-driven micro-narratives among museum spaces, works of art, and viewers, in a dynamic and sensitive adjustment of forces
On the implementation of Absorbing Boundary Conditions in a Finite Difference code with conventional grid
No full textModern numerical experiments for the solution of the direct problem in Seismology (i.e., the
elasto–dynamic problem for fault surfaces) require the use of advanced numerical algorithms, capable of
capturing all the essential features of the physical problem and to properly resolve the characteristic temporal
and spatial lengths. In realistic dynamic models the fault surfaces have dimensions of several kilometer, in
both strike and dip directions (e.g., Bizzarri et al., 2009, among many others). The required resolution of the
problem typically requires the adoption of spatial sampling of several meter and time steps of the order of
fractions of millisecond.
As a consequence, this results in numerical experiments with algebraic equations discretized over
hundreds of mega–nodes (n x 108 nodes). In turn, in order to obtain results in affordable human–times, this
requires the exploitation of symmetry conditions (see for instance Bizzarri, 2009 for further details) and the
use of several code optimizations, as well as an efficient parallel programming.
In addition to the grid dispersion phenomenon, intrinsically present in every numerical algorithm,
another problem can affect the obtained solutions: the spurious reflections of signals originated from the
boundaries of the computational domain. These reflections might introduce numerical artifacts into the
computed solutions and constructively interfere, finally causing problematic oscillations.
One way to solve this problem is to arbitrarily enlarge the size of the computational domain — ideally
approaching the unbounded (with the exclusion of the free surface) medium — in order to delay the back
propagating fronts originating from the model boundaries. This solution is theoretically optimal, but
technically unpractical, since the size of the model can easily become larger than the available computational
resources.
A second possibility to assess the problem is to introduce some ad hoc conditions at (or near to) the
boundaries of the computational domain, in order to cause the back propagating waves to be adequately
small (ideally null) from a numerical point of view.
In this study we present different numerical algorithms consisting in Absorbing Boundary Conditions
(ABCs thereinafter) that can be efficiently used to reduce the boundary effects (i.e., the waves originated by
a seismogenic fault of finite extension reflected back into the model by the boundaries of the computational
domain). We also indicate how they can be proficiently implemented in a Finite Difference, conventional
grid numerical FORTRAN code.INGVPublished3.3. Geodinamica e struttura dell'interno della Terraope
On the implementation of Absorbing Boundary Conditions in a Finite Difference code with conventional grid
No full textModern numerical experiments for the solution of the direct problem in Seismology (i.e., the
elasto–dynamic problem for fault surfaces) require the use of advanced numerical algorithms, capable of
capturing all the essential features of the physical problem and to properly resolve the characteristic temporal
and spatial lengths. In realistic dynamic models the fault surfaces have dimensions of several kilometer, in
both strike and dip directions (e.g., Bizzarri et al., 2009, among many others). The required resolution of the
problem typically requires the adoption of spatial sampling of several meter and time steps of the order of
fractions of millisecond.
As a consequence, this results in numerical experiments with algebraic equations discretized over
hundreds of mega–nodes (n x 108 nodes). In turn, in order to obtain results in affordable human–times, this
requires the exploitation of symmetry conditions (see for instance Bizzarri, 2009 for further details) and the
use of several code optimizations, as well as an efficient parallel programming.
In addition to the grid dispersion phenomenon, intrinsically present in every numerical algorithm,
another problem can affect the obtained solutions: the spurious reflections of signals originated from the
boundaries of the computational domain. These reflections might introduce numerical artifacts into the
computed solutions and constructively interfere, finally causing problematic oscillations.
One way to solve this problem is to arbitrarily enlarge the size of the computational domain — ideally
approaching the unbounded (with the exclusion of the free surface) medium — in order to delay the back
propagating fronts originating from the model boundaries. This solution is theoretically optimal, but
technically unpractical, since the size of the model can easily become larger than the available computational
resources.
A second possibility to assess the problem is to introduce some ad hoc conditions at (or near to) the
boundaries of the computational domain, in order to cause the back propagating waves to be adequately
small (ideally null) from a numerical point of view.
In this study we present different numerical algorithms consisting in Absorbing Boundary Conditions
(ABCs thereinafter) that can be efficiently used to reduce the boundary effects (i.e., the waves originated by
a seismogenic fault of finite extension reflected back into the model by the boundaries of the computational
domain). We also indicate how they can be proficiently implemented in a Finite Difference, conventional
grid numerical FORTRAN code.INGVPublished3.3. Geodinamica e struttura dell'interno della Terraope
De las antiguas vestiduras del poeta. Saint-John Perse y el long poem de viaje en América Latina
No full textEl presente trabajo se propone estudiar la estrecha relación de complicidades que parece establecerse entre Anabase de Saint-John Perse y el canon poético latinoaméricano, destacando su rol estratégico en la difusión de cierta versión del poema largo, una que, sin perder el contacto con la intrínseca “debilidad” de la aventura contemporánea, vuelve a hilvanar lazos temáticos “fuertes” con la épica antigua, interrogándose sobre el heroismo del cantor y relatando sus tribulaciones y empresas a través del arquetipo de la navegación marítima y la asunción de su consustancial mitología de precariedad. Estudiando las circunstancias específicas de las dos principales traducciones latinoamericanas del texto perseano, la mexicana de 1931 y la colombiana de 1949, se tratará de evaluar sus huellas en dos poemas largos referibles al mismo respectivo contexto –Sindbad, el varado de Gilberto Owen y Reseña de los hospitales de ultramar de Alvaro Mutis- para luego juntar cabos con el análisis de un texto más reciente, Tierra final de Jorge Ruiz Dueñas, en el que la influencia perseana vuelve a abrir caminos y posibilidades narrativas parcialmente clausuradas en el filtro crítico de los dos ejemplos anteriores
A thermal pressurization model for the spontaneous ...: 2. Traction evolution and dynamic parameters
No full textWe investigate the dynamic traction evolution during the spontaneous propagation of
a 3-D earthquake rupture governed by slip-weakening or rate- and state-dependent
constitutive laws and accounting for thermal pressurization effects. The analytical
solutions as well as temperature and pore pressure evolutions are discussed in the
companion paper by Bizzarri and Cocco. Our numerical experiments reveal that frictional
heating and thermal pressurization modify traction evolution. The breakdown stress drop,
the characteristic slip-weakening distance, and the fracture energy depend on the slipping
zone thickness (2w) and hydraulic diffusivity (w). Thermally activated pore pressure
changes caused by frictional heating yield temporal variations of the effective normal
stress acting on the fault plane. In the framework of rate- and state-dependent friction,
these thermal perturbations modify both the effective normal stress and the friction
coefficient. Breakdown stress drop, slip-weakening distance, and specific fracture energy
(J/m2) increase for decreasing values of hydraulic diffusivity and slipping zone thickness.
We propose scaling relations to evaluate the effect of w and w on these physical
parameters. We have also investigated the effects of choosing different evolution laws for
the state variable. We have performed simulations accounting for the porosity evolution
during the breakdown time. Our results point out that thermal pressurization modifies
the shape of the slip-weakening curves. For particular configurations, the traction versus
slip curves display a gradual and continuous weakening for increasing slip: in these cases,
the definitions of a minimum residual stress and the slip-weakening distance become
meaningless.PublishedB05304JCR Journalreserve
Selaginella goudotiana var. abyssinica Bizzarri
No full text<p> <b> <i>Selaginella goudotiana</i> Spring var. <i>abyssinica</i> (Spring) Bizzarri</b> —</p> <p>Habit: Lycophyte.</p> <p>Habitat: LMWF; up to 2 500 m. Distribution: II.</p> <p>Voucher: N/A.</p> <p>References: Bussmann (1994), Bussmann & Beck (1995a), Agnew (2013).</p>Published as part of <i>Zhou, Ya-Dong, Mwachala, Geoffrey, Hu, Guang-Wan & Wang, Qing-Feng, 2022, Annotated checklist of the vascular plants of Mount Kenya, East Africa, pp. 1-108 in Phytotaxa 546 (1)</i> on page 13, DOI: 10.11646/phytotaxa.546.1.1, <a href="http://zenodo.org/record/6550464">http://zenodo.org/record/6550464</a>
L'expérience des Conseils de gestion en Italie
No full textBizzarri Gusmana, Verdier Catherine, Trèves Eddy. L'expérience des Conseils de gestion en Italie. In: Autogestion et socialisme : études, débats, documents, N°26-27, 1974. Mouvements ouvriers de gestion et d’action directe en Italie. pp. 77-100
Romualdo Bizzarri, Il problema gnoseologico metafisico moderno di fronte alla filosofia traditionale
No full textRanwez Charles. Romualdo Bizzarri, Il problema gnoseologico metafisico moderno di fronte alla filosofia traditionale. In: Revue néo-scolastique de philosophie. 38ᵉ année, Deuxième série, n°45, 1935. p. 144
Una legge ordinaria tra misure straordinarie: Disposizioni per l'incremento delle costruzioni edilizie (l. 408/1949)
No full textAmong the many Italian legislative dispositions for the social housing during the second post-war, the law n. 408/1949 – commonly known as “Tupini law” – stands out for its contribution to the private building sector. Although the economic side has been long studied and debated, the architectural aspects of the law still need to be further investigated. The aims of this paper are two-fold: understanding the reasons of the final form of the dispositions, and researching its repercussions in the urban and architectural fields
- …
