Search results for "Aves"

Integration of constrained electrical and seismic tomographies to study the landslide affecting the cathedral of Agrigento

2014

The Cathedral of Saint Gerland, located on the top of the hill of Agrigento, is an important historical church, which dates back to the Arab–Norman period (XI century). Unfortunately throughout its history the Cathedral and the adjacent famous Archaeological Park of the 'Valley of the Temples' have been affected by landslides. In this area the interleaving of calcarenites, silt, sand and clay is complicated by the presence of dislocated rock blocks and cavities and by a system of fractures partly filled with clay or water. Integrated geophysical surveys were carried out on the north side of the hill, on which the Cathedral of Agrigento is founded, to define lithological structures involved …

Global and local stressors on community succession in the Mediterranean intertidal zone

Cesare Pavese, Trabajar cansa. Vendrá la muerte y tendrá tus ojos (2018), Traducción de Jorge Aulicino. Buenos Aires: Griselda García Editora. ISBN 9…

2018

Vivimos en una sociedad de signos. Una suerte de “inflacion del significante” atraviesa nuestra cultura. En ese contexto, es bueno recordar que alguna vez la humanidad vivio en una sociedad de simbolos, en donde la palabra se vuelve tension entre lo cosmico y lo onirico, entre los hombres y lo sagrado, entre la historia y el mito. Es la poesia la manifestacion mas acabada de esta sociedad de simbolos que, pese a todo, subsiste en los subsuelos de aquella otra aparentemente dominante, con una vida casi silenciosa pero vital y explicita. No por nada, la filosofia y la poesia, al decir de ese gran poeta y pensador que fue Giacomo Leopardi, son las disciplinas mas afines entre si. Por tanto, no…

All polarization-maintaining assively mode-locked yb-doped fiber laser : pulse compression using an anomalous polarization-maintaining photonic cryst…

2019

We report the generation of short pulses at 1 μm using an all-polarization-maintaining (PM) fiber configuration. The pulses are provided by an all normal-dispersion Fabry-Perot Yb-doped cavity and are compressed with an anomalous polarization-maintaining photonic crystal fiber (PM PCF). Opposed to standard configurations; here the filtering action is solely performed by the finite bandwidth of the gain medium. The laser generates 8 ps width sech 2 profile pulses at 1046.8 nm with a −10 dB bandwidth of 5.9 nm. After compression using the PM PCF, pulses with an FWHM of 3 ps were obtained, limited by the actual value of the available anomalous dispersion. We also report the changes in the outp…

All-Fiber Laser With Intracavity Acousto-Optic Dynamic Mode Converter for Efficient Generation of Radially Polarized Cylindrical Vector Beams

2017

We report an all-fiber laser that emits a radially polarized cylindrical vector beam (CVB) at 1 μm based on an intracavity acousto-optic mode converter. We efficiently generate the CVB, taking advantage of the acousto-optic coupling from the HE11 mode to the TM01 mode in a two-mode fiber. The laser can be switched from emitting a Gaussian-like beam to a radially polarized CVB. Radially polarized CVBs with modal and polarization purities >98% and a maximum power of 65 mW were generated.

Time evolution of medium and long-period ground tilting at Campi Flegrei caldera

2020

Abstract. We analyse tiltmeter time series recorded from April 2015 to March 2019 at three borehole instruments installed at Campi Flegrei caldera (Italy). We evaluate the crustal response in terms of ground tilting to external excitations of medium/long-period tidal constituents by applying a polarization analysis. The azimuths of the tilt vectors show well-defined polarization directions and the ground tilting planes oscillate with the periodicity of the corresponding tidal constituents. For two of the three tiltmeters, the average ground oscillation pattern related to the monthly Mm and fortnightly Mf constituents show seasonal variations, which can be ascribed to rainfall-induced tiltin…

Failure Rate Measurement on Silicon Diodes Reverse Polarized at High Temperature

2017

This paper calculates the failure rate on reversed polarized silicon diodes with the aim to justify, experimentally, the rules of the European Space Agency (ESA) which are referred to the component life’s extension, the reliability increase and the end of life performance enhancement, by using oversized devices (derating rules). In order to verify the derating rules, 80 silicon diodes are used, which are reverse polarized in a high temperature environment. The diodes are divided in 4 groups of 20 diodes, applying a different voltage to each group, in order to relate the failure rate to the applied derating rule. The experiment described in this paper is developed using a temperature acceler…

Antônio Etíope e Benedito, o mouro: o escravinho Santo e o preto eremita

2009

This article discusses the process of canonization of two African slaves, Benedict and Anthony, who were taken to Sicily through a combination of privacy wars, the slave trade and conflicts between Christian states and the Ottoman Empire in the context of modern-era Mediterranean. Along with other "servants of God" with exemplary lives, they both joined the Franciscan Order and were elevated to the altar after their deaths, while enslaved Christians in African territory "took the turban" with some even became local Muslim authorities. Sicily, a Spanish vice-kingdom near the northern African coast, was a cultural crossroad and for at the same time a privileged laboratory for the activity of …

¿Música o magia? La presentación de las ondas musicales de Maurice Martenot en España

2015

On 1928, the French musician Maurice Martenot presented at Paris Opera a new electronic musical instrument which he called musical waves. It had success like only a few and attracted the interest of the composers, Martenot strove to spread it with a initial tour that took it all around the world between 1931 and 1932. From the information given by the press –because there are not more references– this article aims to rebuild the presentation of the instrument in Spain all along 1932, to report about the reception by the review and to justify the mystery that involved the instrument because of its unknown electronic running and its performance only with the hands movement on the air.En 1928,…

Metabarcoding Analysis of Fungal Diversity in the Phyllosphere and Carposphere of Olive (Olea europaea)

2015

The fungal diversity associated with leaves, flowers and fruits of olive (Olea europaea) was investigated in different phenological stages (May, June, October and December) using an implemented metabarcoding approach. It consisted of the 454 pyrosequencing of the fungal ITS2 region and the subsequent phylogenetic analysis of relevant genera along with validated reference sequences. Most sequences were identified up to the species level or were associated with a restricted number of related taxa enabling supported speculations regarding their biological role. Analyses revealed a rich fungal community with 195 different OTUs. Ascomycota was the dominating phyla representing 93.6% of the total…