1,720,963 research outputs found
Tra Palatino e valle del Colosseo: nuovi dati
No full textI dati di cui si discute provengono dagli scavi condotti sulla pendice del Palatino e nella valle del Colosseo fino al 2004, con il ritrovamento della Meta Sudans augustea e di un inedito santuario sulla Velia
Roma - Meta Sudans. I monumenti. Lo scavo. La storia
Full text linkQuesto lavoro è dedicato ai risultati delle indagini svaltesi dal 1986 al 2003 nella Piazza del Colosseo in Roma, nell'area circostante i resti della monumentale fontana di età flavia detta Meta Sudans. Viene dapprima riassunta la complessa sequenza stratigrafico-monumentali, con evidenze che vanno dall'età orientalizzante all'attuale e con monumentistraordinariamente conservati, soprattutto per l'età giulio-claudia. Viene poi analizzato l'eccezionale complesso monumentale rinvenuto al disotto delle fondazioni della fontana flavia. Edificato in età augustea di fronte al probabile santuario delle Curiae Veteres e restaurato in epoca claudia, questo complesso attesta l'esistenza di una precedente Meta Sudans, affiancata da un sacello compital
INDAGINI GEOFICHE ED ARCHEOLOGICHE IN AREA URBANA: IL CASO DELLE PENDICI NORD-ORIENTALI DEL PALATINO
No full textLa ricerca è indirizzate alla valutazione delle tecniche geofisiche più adatte all'individuazione nel sottosuolo di strutture antiche, in un centro urbano pluristratificato (Roma, Palatino). Il confronto tra i risultati dell'applicazione del georadar e della geoelettrica al sito e quelli archeologici desunti dallo scavo, restituisce una sere di risultati interessanti e mostra le possibilità della geofisica ad interagire positivamente con l'archeologia
Il tempio restaurato da Claudio e l'organizzazione degli spazi tra pendice nord-orientale del Palatino e Valle del Colosseo in età Giulio-Claudia: nuovio dati
No full textLo studio del'iscrizione posta sul fregio-architrave del tempio, ha consentito di ricostruire la dimensione dell'edificio e la sua datazione. Sudio del contesto architettonico e archeologico
Lo scavo archeologico. Tra ricerca e trasmissione della memoria. Roma: Valle del Colosseo/Palatino nord-orientale
Full text linkA Solid-State Single-Ion Conductor for Lithium Batteries Based on Anionic Nanoparticles of Fluorinated Titania
No full textNowadays, among the most challenging classes of materials for the development of high-energy density lithium batteries are electrolytes and high-capacity cathode materials. A considerable interest is attracted by metallic lithium anode-based Li-S and Li-air batteries because of their high specific capacity. Nevertheless, the use of a metallic lithium anode compromises the chemical and electrochemical stability of the electrolyte. To address these drawbacks, a significant research effort is recently devoted to the design and preparation of new lithium-conducting electrolytes. Here, a new concept of electrolyte based on a solid-state lithium single-ion conductor is proposed, which opens new perspectives in the development of advanced lithium batteries. The electrolyte is obtained by direct reaction of nanometric fluorinated TiO2 (FT) with molten metallic lithium, and consists of nanoparticles (NPs) with surface anionic groups neutralized by lithium cations. The resulting nanopowder is labelled LiFT®. It should be highlighted that after functionalization, the conductivity of fluorinated TiO2increases by more than four orders of magnitude. In this work, the structure of LiFT is elucidated by means of several techniques such as: Inductively-Coupled Plasma Atomic Emission Spectroscopy (ICP-AES); High-Resolution Transmission Electron Microscopy (HR-TEM), powder X-Ray Diffraction (XRD), Infrared Spectroscopy (FT-MIR and -FIR), electrochemical measurements and solid-state Magic-Angle Spinning-NMR (MAS-NMR) spectroscopy. XRD and HR-TEM measurements show that LiFT has the “core” structure of anatase, with Li cations present only in the external lithium-rich shell of NPs. Thus, no intercalation processes of Li+ in “core” LiFT NPs take place. In addition, it is demonstrated that lithium cations can migrate through grain boundaries of electrolyte NPs in a very effective way, achieving: 1) a room-temperature single-ion conductivity of about 3x10-4 Scm-1; 2) an excellent electrochemical stability; and 3) a high exchange current density. All these features, together with an easy synthesis process, which is based on precursors obtained from very cheap starting materials, make LiFT a very attractive material for application in several fields such as: a) all-solid-state lithium batteries; b) molten electrode lithium batteries; c) nanocomposite electrolytes and d) lithium-air batteries
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
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
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