515 research outputs found
Francesc Gavilanes Ferret
No full textRetrat primer pla de Francesc Gavilanes Ferret, amb una dedicatòria de Jaume Rull a la biblioteca de l'Orfeó Catal
Scalability of Optical Interconnects Based on Microring Resonators
No full textThis letter investigates the use of optical microring resonators as switching elements (SEs) in large optical interconnection fabrics. We introduce a simple physical-layer model to assess scalability in crossbar- and Benes-based architectures.We also propose a new dilated SE that improves scalability to build fabrics of several terabits per second of aggregate capacit
'Historia secreta del mundo', de Emilio Gavilanes: una novela imposible, una colección de microrrelatos
No full textThe article is related to a recent book: Historia secreta del mundo (2015), by Emilio Gavilanes. Specifically, it aims to demonstrate how its narrative structure is created from the tension between the genre of the microstory and that of the novel, such that one would have to ponder why the author decides on the former to express himself. It seems crucial that the collection of microstories that comprise Historia secreta del mundo are not told as separate chains, but rather form a single unit thanks to the central theme (time), which, furthermore, is of relevant structural value and on which we shall focus.El artículo aborda un libro reciente: Historia secreta del mundo (2015), de Emilio Gavilanes. Concretamente, pretende demostrar cómo se arma su estructura narrativa desde la tensión del género del microrrelato con el de la novela, de manera que habría que cavilar sobre por qué el autor se decanta por el primero para encauzar su expresión. Se antoja clave que el conjunto de microrrelatos que ensamblan Historia secreta del mundo no se relacionen como eslabones separados, sino que conformen una unidad gracias al tema capital del tiempo, que además goza de un valor estructural relevante, en el cual nos detenemos
Optical interconnection networks based on microring resonators
No full textOptical microring resonators can be integrated on a chip to perform switching operations directly in the optical domain. Thus they become a building block to create switching elements in on-chip optical interconnection networks, which promise to overcome some of the limitations of current electronic networks. However, the peculiar asymmetric power losses of microring resonators impose new constraints on the design and control of on-chip optical networks. In this work, we study the design of multistage interconnection networks optimized for a particular metric that we name the degradation index, which characterizes the asymmetric behavior of microrings. We also propose a routing control algorithm to maximize the overall throughput, considering the maximum allowed degradation index as a constrain
Historia secreta del mundo by Emilio Gavilanes: An impossible novel, a collection of microstories
No full textEl artículo aborda un libro reciente: Historia secreta del mundo
(2015), de Emilio Gavilanes. Concretamente, pretende demostrar cómo
se arma su estructura narrativa desde la tensión del género del microrrelato
con el de la novela, de manera que habría que cavilar sobre por qué el autor
se decanta por el primero para encauzar su expresión. Se antoja clave que
el conjunto de microrrelatos que ensamblan Historia secreta del mundo
no se relacionen como eslabones separados, sino que conformen una
unidad gracias al tema capital del tiempo, que además goza de un valor
estructural relevante, en el cual nos detenemosThe article is related to a recent book: Historia secreta del
mundo (2015), by Emilio Gavilanes. Specifically, it aims to demonstrate
how its narrative structure is created from the tension between the genre of
the microstory and that of the novel, such that one would have to ponder
why the author decides on the former to express himself. It seems crucial
that the collection of microstories that comprise Historia secreta del
mundo are not told as separate chains, but rather form a single unit
thanks to the central theme (time), which, furthermore, is of relevant
structural value and on which we shall focusEste trabajo se ha llevado a cabo gracias al programa de Ayudas para la Formación de Profesorado Universitario, del Ministerio de Educación, Cultura y Deport
Gestión del combustible leñoso e impacto medioambiental asociados a la metalurgia protohistórica de Punta de los Gavilanes (Mazarrón, Murcia)
No full textNot AvailableLas estructuras de combustión de carácter metalúrgico documentadas en las fases de la ocupación de los siglos VII-I a.C. de Punta de los Gavilanes han permitido abordar el estudio antracológico del combustible leñoso asociado a siete de ellas facilitando información relativa a las pautas de gestión de los recursos forestales del entorno para el abastecimiento de los hornos, así como a la intensidad del impacto medioambiental generado por las labores de recolecta. Los resultados obtenidos documentan una amplia variabilidad taxonómica que se distribuye siguiendo tendencias similares en los hornos analizados. Las conclusiones apuntan a que el combustible leñoso fue recolectado en puntos del entorno inmediato al promontorio, sin constatarse patrones de selección sobre los taxones, ni atendiendo a sus propiedades ni a la funcionalidad de las estructuras. La degradación ecológica producida por estas actividades tuvo un alcance muy limitado, ya que no se aprecian alteraciones destacables en la señal antracológica.
[fr] Les structures de combustion à caractère métallurgique découvertes aux phases d’occupation des VIIème-Ière siècles av. J.C. de Punta de los Gavilanes ont permis d’aborder l’étude anthracologique du combustible ligneux associé à sept de ces structures. Les objectifs ont été, en premier lieu, obtenir une information relative aux règles de gestion des ressources forestières de l’environnement pour l’approvisionnement des fours et, en second lieu, évaluer l’intensité de l’impact environnemental produit par les activités de récolte.
Les résultats ont permis l’identification d’une grande variabilité taxonomique qui est distribuée avec des tendances semblables dans les différents fours analysés. Les conclusions indiquent que le combustible ligneux a été récolté aux zones proches au site. On n’a pas constaté des règles de sélection sur les essences, ni par rapport avec ses propriétés ni avec la fonctionalité des structures. La dégradation écologique produite par ces activités a été très limitée, puisqu’on n’apprécie pas de modifications remarquables dans les données anthracologiques
Can simple optical switching fabrics scale to terabit per second switch capacities?
No full textThe design of fabrics for terabit packet switches and routers needs to consider the limitations imposed by electronic technologies. In particular, attention has to be paid to information density and to power consumption and dissipation, as well as to power supply and footprint requirements. Optical technologies can overcome some of these limitations. We analyze the use of optical fabrics to interconnect line cards in terabit packet switches and routers. For this purpose, single-plane and multiplane optical interconnection architectures are proposed that exploit wavelength agility at line cards to implement the required switching functionality. The physical-layer scalability and feasibility of these architectures are studied by using realistic models, mostly based on the characteristics of commercially available opto-electronic devices. As a result, the considered architectures can be characterized in terms of power budget and signal-to-noise ratio, enabling the computation of the maximum achievable port count and aggregate switching capacity. Our results show that aggregate capacities of the order of a few terabits per second are possible in very simple optical switching fabrics and that the multiplane architectures permit a complexity trade-off between the wavelength and space domains, making the overall design more feasible
Different Settings of Nonsynchronized Bilevel Nasal Continuous Positive Airway Pressure and Respiratory Function in Preterm Infants: A Pilot Study
No full textObjective With this study, we evaluated the short-term effects of different modes and settings of noninvasive respiratory support on gas exchange, breathing parameters, and thoracoabdominal synchrony in preterm infants in the acute phase of moderate respiratory distress syndrome. Study Design A feasibility crossover trial was conducted in neonates < 32 weeks' gestation on nasal continuous positive airway pressure (n-CPAP) or bilevel n-CPAP. Infants were delivered the following settings in consecutive order for 10 minutes each: • n-CPAP (5 cm H 2O) • bilevel n-CPAP 1 (Pres low = 5 cm H 2O, Pres high = 7 cm H 2O, T-high = 1 second, rate = 30/min) • n-CPAP (5 cm H 2O) • bilevel n-CPAP 2 (Pres low = 5 cm H 2O, Pres high = 7 cm H 2O, T-high = 2 second, rate = 15/min) • n-CPAP (5 cm H 2O). During each phase, physiologic parameters were recorded; the thoracoabdominal synchrony expressed by the phase angle (Φ) and other respiratory patterns were monitored by noncalibrated respiratory inductance plethysmography. Results Fourteen preterm infants were analyzed. The mean CPAP level was significantly lower in the n-CPAP period compared with bilevel n-CPAP 1 and 2 (p = 0.03). Higher values were achieved with bilevel n-CPAP 2 (6.2 ± 0.6 vs. 5.7 ± 0.5 cm H 2O, respectively; p < 0.05). No statistical difference in the Φ was detected, nor between the three settings. Conclusion Our study did not show any superiority of bilevel n-CPAP over n-CPAP. However, nonsynchronized bilevel n-CPAP might be helpful when additional pressure is needed. Key Points There is currently a high degree of uncertainty about the superiority of one modality and setting of noninvasive respiratory over another. Our study confirmed that non-synchronized bilevel n-CPAP might be helpful when additional pressure is needed for recruitment. A T-high of 1 second could possibly be better tolerated in this population, but further research is needed
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