1,720,957 research outputs found
Caratterizzazione Minero-Petrografica e Geochimica di Due Cave di “Marmo Onice” del Monte Circeo (Lazio, Italia): Alabastro Giaccione e Cotognino”
No full textThe calcareous alabaster was used to carry out historical and archaeological artifacts. Its diffusion was very increased in imperial age when quarries of Circeo mountain exploitation began. Coloured litotype exploitated more times in the past were studied, in fact archaeologies have found evidences in many roman remains of Giove Anxur temple near Terracina and in some covering slabs and columns in monumental churches of XVI-XVIII centuries. The 2 quarries are near San Felice Circeo town (“Guardi D’Orlando – Monticchio and “La Batteria”); “cotognino” alabaster and “a giaccione” alabaster was carried out from these 2 sites, these 2 litotypes was considered very valuable some years ago. Alabaster formation of “Monticchio” ore is made up from calcareous water circulation into the jointing of Circeo liassic limestones, it is constituted of crystalline stalactitic concretions, sometimes many zones show gradation of colour from honey to intense brown, and it is called “cotognino”. “Giaccion” alabaster take its name to be like ice, in fact it shows colours from white to bright yellow, and is into the liassic fractured limestones. By the light of this thin section analyses, X-ray diffractometry, RI determination, X-ray fluorescence and C, O and Sr isotopic analyses was carried out from each samples. A geologic characterization is defined, considering minero-petrographic, chemical and geochemical features, to solving archaeometric problems about artifacts made up to alabaster lithotypes
Study for restoration purposes about the obelisk located in "piazza della libertà" at ostuni (brindisi, Southern Italy)
No full textStone materials composing the St. Oronzo Rococ (local Baroque) obelisk, dedicated to patron saint of Ostuni in 1771 AD, were characterised. The monument is located in "Piazza della Libertà" at Ostuni (Brindisi, Southern Italy). The obelisk is composed of two different lithotypes, more or less pure Cretaceous limestone, with a variable porosity and biogenous component. Mineralogical, petrographical, geochemical and palaeontological and 87Sr/86Sr datation comparisons between finding lithotypes and Cretaceous limestones cropping out in four quarries already studied from some authors in the Ostuni sector, allow to ascribe obelisk samples to megabreccia quarry of Melpignano close to the ancient city wall of Ostuni. On the most used lithotype, recognised and sampled in the quarry, physical, mechanical and ageing tests have been carried out. These tests have evidenced the high porosity of the materials and have furnished some indications about utilisation and restoration methods
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
Get PDFWe 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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