1,720,956 research outputs found
Data from Multiple Portable XRF Units and Their Significance for Ancient Glass Studies
No full textX-ray fluorescence spectroscopy is a non-destructive technique employed for elemental analysis of a wide range of materials. Its advantages are especially valued in archaeometry, where portable instruments are available. Considering ancient glass, such instruments allow for the detection of some major, minor, and trace elements linked to the deliberate addition of specific components or to impurities in the raw materials of the glass batch. Besides some undoubted advantages, portable XRF (p-XRF) has some limitations that are addressed in this study. The performance assessment of four different p-XRF units and the reconciling of their output were conducted. The results show the limitations in cross-referencing the data obtained from each unit and suggest procedures to overcome the issues. The p-XRF units were tested on the set of Corning reference glasses and on a small set of archaeological glasses with known composition. The compatibility of the output was assessed using multivariate statistical tools. Such a workflow allows us to consider data from multiple sources in the same frame of reference
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
La spada dell’ipogeo R. Analisi archeometriche
No full textIl n. 20 della collana Quaderni del Sistema museale del Lago di Bolsena è il terzo volume pubblicato in questa serie dal Museo della preistoria della Tuscia e della Rocca Farnese di Valentano.
Il Naviglione di Farnese. Dall’Età del Rame all’Età etrusco-arcaica è frutto di un lavoro corale di ricerca che, sotto il coordinamento di Patrizia Petitti, Carlo Persiani e Fabio Rossi, ha coinvolto numerosi specialisti.
Non deve stupire che il sito oggetto di questa pubblicazione sia posto al di fuori dei confini del Comune di Valentano. Questo per due motivi. Da una parte il Museo della preistoria, per sua stessa denominazione e missione, si pone come centro di riferimento per la preistoria di tutta la Tuscia. Inoltre, Farnese è uno dei comuni che risulta tra quelli fondatori del Sistema museale. L’incursione del Museo della preistoria di Valentano in territorio farnesano, pertanto, va letta non soltanto come legittima, ma come esempio di vera e propria buona pratica di natura sistemica. Ciascun museo del Sistema infatti, caratterizzato da una propria tematica e da una propria chiave di lettura legata alla disciplina della quale è espressione, oltre a svolgere la funzione di centro interpretativo in relazione alle emergenze patrimoniali di più immediata pertinenza, può e deve dare un proprio contributo alla lettura del territorio abbracciato dall’intera rete.
Agli occhi di un non-addetto-ai-lavori, di un lettore cioè che può soltanto in parte comprendere ed apprezzare lo sforzo analitico e il rigore interpretativo riversati nella scrittura dei contributi che costituiscono il presente lavoro, il Quaderno 20 ha un suo specifico fascino. Fascino legato all’idea di scavo, e all’immaginario che questa pratica è in grado di attivare, di solleticare. Lo scavo inaugurale di cui fu protagonista Rittatore Vonwiller, a cui si deve l’individuazione della Necropoli del Naviglione sul finire degli anni Sessanta del Novecento. Quelli realizzati un ventennio dopo, con la ripresa dell’interesse nei confronti del sito. Quello che i curatori hanno promosso tra le carte ed i documenti prodotti in vari decenni di studi, di relazioni, di documenti prodotti dalle competenti autorità preposte alla conoscenza ed alla tutela del patrimonio archeologico. Rimane il rammarico, questo sì, per l’interruzione – dopo il 1997 – degli scavi, interruzione dovuta al taglio, operato a livello centrale, dei fondi necessari a questo tipo di impresa. Nonché per il danno apportato al sito dagli scavi clandestini. Ma tutto ciò non può far perdere di vista il grande merito che va attribuito a questa pubblicazione, quello di operare un primo importante passo verso la pubblica restituzione delle conoscenze circa questo importante capitolo della storia e dell’archeologia del paesaggio del Sistema museale del Lago di Bolsena
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
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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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