1,721,066 research outputs found
Gold-transporting hydrothermal fluids in the Earth's crust: An introduction
No full textHydrothermal ore deposits that are exploited for gold include both gold-only deposits, such as orogenic deposits, and gold-bearing examples of the common hydrothermal deposit types that are formed around upper-crustal magmatic centres, in particular porphyry and epithermal deposits. Fluid inclusion data have shown that ore fluids of gold-only deposits are compositionally distinct compared to fluids of other deposit types: Fluids of the latter deposit types are, in contrast, not distinctive, and recent research has been focussed on relating gold content to geochemical and petrological aspects of related magmatic systems and to fluid evolution on migration through the crust. This Special Publication includes an up-to-date summary of thermodynamic parameters of aqueous Au species at high temperatures and pressures, a dataset of fluid inclusion properties and compositions from orogenic deposits of different parts of the world, several comprehensive case studies of different types of gold deposits and their fluids from the USA, Brazil, Egypt, Slovakia and Bulgaria and numerical modelling aimed to define key parameters that affect fluid flow and gold deposition at a range of scales
Cockade-textured cataclasite and silica gel from damage zone in carbonated ultramafics: markers of cycles of seismic activity?
No full text
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
Promozione del turismo sostenibile in un contesto urbano: uno studio esplorativo sul caso "Taranto Capitale di Mare"
No full textLa finalità principale della presente ricerca è approfondire la relazione tra turismo sostenibile urbano e sviluppo del city-brand “Taranto Capitale di Mare”. In linea con gli obiettivi prefissati nell’Agenda ONU 2030, nello specifico in linea con l’obiettivo 8 – “Decent Work and Economic Growth”, target 8.9, in cui entro il 2030, i territori sono chiamati ad “elaborare e attuare politiche volte a promuovere il turismo sostenibile, che crei posti di lavoro e promuova la cultura e i prodotti locali”, il modello di sviluppo che ha adottato la città di Taranto negli ultimi anni ha inteso rinnovare il proprio City-Brand con l’intento di ritrovare la propria vocazione turistica attraverso il mare, orientandosi esclusivamente alla sostenibilità. Dal punto di vista metodologico, la ricerca adotta un approccio qualitativo ed attraverso lo strumento delle interviste in profondità esplora le attuali linee strategiche, di sviluppo e promozione turistica, messe in campo dalla città di Taranto. I risultati dimostrano come la governance locale stia perseguendo speditamente gli obiettivi prefissati dal grande piano “Ecosistema Taranto”, in termini di sviluppo turistico sostenibile e ridefinizione del proprio city-brand. La presente ricerca fa luce sullo stato di riposizionamento della città di Taranto e sul percorso di rinnovo del suo city-brand ed individua future linee di ricerca che supportino lo studio qualitativo preliminare
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
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