1,721,314 research outputs found
La collina, l'acqua e l'albero ovvero immaginare la tomba di Osiride. Forma e struttura di uno spazio mitico
No full textSecondo la tradizione, la morte violenta di Osiride si sarebbe consumata presso la “sponda di Nedit” e il corpo del dio sarebbe andato alla
deriva lungo il Nilo prima di essere recuperato, ricomposto e seppellito.
Le fonti letterarie contengono scarse indicazioni sul luogo e sull’aspetto
della sepoltura, ma alcune interessanti evidenze iconografiche ci consentono
di comprendere, con maggior precisione, come la mente egiziana immaginasse la tomba del grande dio dell’Aldilà. Descritto nei testi come
“Collina di Osiride” e rappresentato secondo una specifica connotazione paesaggistica (una collina alberata circondata dalle acque), questo spazio mitico rivela anche una struttura complessa e articolata, che gli deriva dalla combinazione e integrazione reciproca di tre principali elementi
semantici (collina; acqua; alberi).
Forma e struttura sono dunque i due livelli d’indagine su cui si focalizzerà l’analisi iconografica della tomba divina: da un lato, il corpus documentario discusso consentirà di seguirne lo sviluppo storico attraverso
l’elaborazione artistica e monumentale; dall’altro, la scomposizione dell’immagine nelle sue unità iconiche contribuirà a mettere in luce la polisemia di ciascuna di esse e permetterà di individuare la rete di connessioni (mitiche e simboliche) soggiacente alla percezione e costruzione culturale di un tale spazio sacro dell’immaginario religioso egiziano.According to the tradition, the murderous death of Osiris took place on the “bank of Nedit” and the disiecta membra of the divine body went
floating along the Nile before being found, reassembled and buried. Literary sources contain just few allusions to the location and the aspect of the burial but some interesting iconographic evidence helps us to more precisely
understand how the Egyptian mind visualized the tomb of the great god of the afterworld. Labeled in the texts as “Mound of Osiris”, and illustrated according to a specific landscape connotation (a hill surmounted
by trees and surrounded by waters), such a mythical place also shows a multilayered and articulated structure, resulting from the combination and mutual integration of three main semantic features (hill; water; trees).
Iconic form and symbolic structure will be, therefore, the two focal points discussed in the present analysis on the representation tomb of
Osiris: on the one hand, the corpus of documents considered will enable us to follow its historical development through artistic and monumental elaboration; on the other, by breaking the whole icon down in its elementary units, it will be possible to elucidate the polysemy of each of them and to highlight the network of mythical and symbolic references underlying the perception and cultural construction of such a sacred space of the Egyptian religious imaginary
Θεοί and ‘Iεροί: some remarks on animal cult in Ancient Egypt according to Classical and Egyptian texts
No full textThe chief purpose of this paper is to discuss the possibility to recognize an Egyptian terminology or categorization about so-called 'sacred animals', paying particular attention to the two main classes the texts allow us to identify and trying to ascertain the specific devices and lexical choices by means of which such a distinction was communicated
Characterization of a new pixelated diamond detector for fast neutron diagnostics on fusion reactors
Full text linkThis research activity focuses on characterizing an innovative pixelated diamond detector utilizing Timepix3 (TPX3) chip technology. This detector combines a polycrystalline diamond with the TPX3 chip. Future versions will feature a monocrystalline diamond covering a 14 × 14 mm2 area, achieving a remarkable spatial resolution of 55 μm. The TPX3 chip empowers pixel-wise simultaneous counting, charge measurement, and time recording, enabling precise monitoring of neutron interactions within the diamond, which are manifested as tracks. This capability proves invaluable for multiparametric analysis along a designated line of sight in a Tokamak machine. This is a central objective of this research. We aim to investigate the detector's response to neutrons within the 1-20 MeV energy range, which is critically relevant in nuclear fusion. Furthermore, TPX3's capacity to discriminate against signals from intense background sources, primarily gamma rays and scattered neutrons, is of paramount importance for designing diagnostic systems and the interpretation of data. Equally significant is the detector's ability to capture the temporal evolution of neutron emissions, offering real-time monitoring prospects that can be seamlessly integrated into feedback systems. A pivotal facet of this research involves the development of an algorithm. This algorithm, informed by laboratory measurements and Monte Carlo simulations, elucidates the distribution of pixel patterns generated in the diamond by primary neutron reactions. Its application to experimental data will facilitate the determination of the neutron spectrum. Specifically, the thesis is organized as follows. The first two chapters introduce the scientific context in which this research unfolds, presenting essential insights into the fundamental properties of neutron emissions from fusion plasmas. Chapter 3 reviews neutron detection systems, focusing on the Timepix3 detector. Its unique capabilities are showcased through two applications: radon decay product and thermal neutron monitoring using a 6LiF converter. These applications highlight the potential of these detectors as track detectors, particularly their ability to discriminate particles through morphological track analysis. Chapter 4 provides a comprehensive overview of the Diamondpix detector. The chapter discusses the properties of diamonds and presents the results of characterization studies of the Diamondpix detector. Finally, in Chapter 5, the potential of Diamondpix as a detector for fast neutrons is explored. Measurements were conducted at FNG (ENEA Frascati) and n_TOF (CERN). At FNG, the response of Diamondpix to 2.5 and 14 MeV neutrons from D-D and D-T reactions was characterized. The neutron efficiency at the two energies was also estimated. At n_TOF, time-of-flight measurements with Diamondpix were performed. Track analysis was carried out at different neutron energies, and Diamondpix was energy calibrated. The Diamondpix charge response was analyzed, and the FNG and n_TOF results were compared. Charge profiles were analyzed and compared with Monte Carlo simulations
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
"The Sound of Silence": sul significato del silenzio e di alcune interdizioni musicali in relazione alla figura e al culto di Osiride
No full textAll’interno del panorama religioso egiziano, il tema della sepoltura di Osiride riveste un ruolo di grande preminenza e centralità, tale da stimolare l’interesse e l’attenzione degli autori classici che, a più riprese e più o meno diffusamente, si sono soffermati sull’argomento. Sono proprio queste fonti a fornirci un’indicazione, tanto curiosa quanto suggestiva, relativa ad un aspetto particolare che sembra caratterizzare, in maniera ricorrente, un momento preciso delle celebrazioni rituali in onore del dio: l’imposizione del silenzio e l’interdizione della musica, e di alcuni strumenti in particolare, in occasione della rievocazione della sepoltura. Mentre in Strabone (Geografia XVII C 814) la connessione tra divieto e culto di Osiride è esplicitamente formulata, in Plutarco (De Iside et Osiride 362 F; Il Banchetto dei Sette Sapienti 150 F) ed Eliano (De natura animalium X, 28) essa sembra potersi dedurre soltanto indirettamente. Tuttavia, il dato che questi autori presentano trova un significativo riscontro in alcuni importanti testi egizi che, oltre ad ampliare l’orizzonte geografico di tali prescrizioni, intervengono altresì a precisare le esatte coordinate spaziali e temporali in cui esse si inseriscono.
In continuità con un precedente lavoro sulle modalità di percezione della tomba divina nella mentalità egiziana antica, il presente contributo intende dunque esplorare il ruolo del silenzio come elemento di costruzione di uno spazio-tempo sacro anche attraverso la dimensione sonora o, in questo caso, la sua negazione; di chiarire il significato ideologico di tale assenza in funzione dell’occasione rituale specifica in cui viene attuata e del particolare soggetto coinvolto; di valutarne infine incidenza e sviluppi in seno ad una più ampia e antica tradizione mitico-religiosa in cui, invece, voce e musica pienamente dispiegata giocano un ruolo essenziale, in rapporto anche alla figura stessa di Osiride (basti pensare alle Lamentazioni di Iside e Nefti). In questa prospettiva, se da un lato l’assenza del suono emergerà, nel contesto esaminato, come un aspetto anomalo rispetto ad una prassi rituale consolidata, dall’altro proprio il silenzio risulterà straordinariamente efficace nel dare forma, in modo discreto ma non per questo meno concreto, a un così peculiare “paesaggio sonoro” (secondo la definizione di R. M. Schafer)
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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