117,405 research outputs found
La tribù di San Besso. Cent’anni dopo sulle tracce di Robert Hertz. Video digitale, durata: 26’29”. Università degli Studi di Scienze Gastronomiche - Laboratorio “Granai della memoria”. Ricerca antropologica di Gianpaolo Fassino. Regia, riprese e montaggio di Luca Percivalle
No full textIl video La tribù di San Besso documenta la festa di San Besso, annualmente celebrata il 10 agosto presso l’omonimo santuario sito sugli alti pendii delle Alpi Graie, ai confini fra Piemonte e Valle d’Aosta. Con questo lavoro si sono voluti ripercorrere i terreni d’indagine etnologica di Robert Hertz, esattamente cento anni dopo il suo lavoro di terreno (1912) e la pubblicazione degli esiti nel saggio Saint Besse. Étude d’un culte alpestre (comparso nella “Revue de l’histoire des religions” del 1913). Il video documenta la vivacità con cui la salita al santuario di San Besso è tuttora praticata dalle popolazioni della Valle Soana e della Valle di Cogne, cercando di mettere in luce continuità e differenze – rispetto al quadro descritto da Hertz – di alcuni dei tratti caratterizzanti il rito: il rapporto con la pietra taumaturgica dello sperone roccioso su cui si innesta il santuario, la processione sacralizzatrice, il sonno a contatto con la roccia, il rito di passaggio alla maggiore età dei diciottenni di Cogne
Effects of Finite Aperture and Random Phase Errors for a Space Debris Radar Antenna Array
No full text
The evolution of imaging in respiratory dysfunction failure
No full textIn this chapter we will illustrate the paradigmatic role that medical imaging has played in helping to define, understand, and treat a specific form of respiratory failure called acute respiratory distress syndrome (ARDS). ARDS is a life-threatening syndrome characterized by noncardiogenic (inflammatory) pulmonary edema causing mainly hypoxemic respiratory failure unresponsive to conventional therapy
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
The Sardinia Radio Telescope Upgrade to Telemetry, Tracking and Command: Beam Squint and Electromagnetic Compatibility Design
No full textThis paper describes the most recent improvements for the upcoming upgrade to telemetry, tracking and command
(TT&C) capabilities for the Sardinia Radio Telescope (SRT), a 64-m antenna tailored for radio-astronomical observations
of cosmic radio sources located in the outer space. Due to the TT&C improvement, the SRT will represent one
of the Europe's main establishments for the support of present and future deep space missions. The first part of this
paper is dedicated to the Gaussian Beam synthesis of the SRT feeding system, called beam waveguide, fashioned
to maximize the antenna illumination and spillover efficiency. The best design parameters have been retrieved through
a rapid and efficient optimization analysis and verified by means of physical optics simulations. In accordance with the
obtained results from the Gaussian formulation, further in-depth studies have been undertaken in order to investigate
a technique able to overcome the so-called beam squint issue, a typical drawback that occurs during the tracking process
of active spacecrafts. The proposed approach manages to automatically attain and quickly the best antenna
beam steering strategy to correct the squint issue by means of a field-matching algorithm. Finally, this paper reports
the analyses developed for electromagnetic hazard predictions, which shall be carefully taken into consideration for
the safety of personnel working close to the high-power radiating installations and for preventing the astronomical receivers
located near the Prime and the Gregorian foci from being damaged when the antenna is transmitting
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