1,720,961 research outputs found
Hidden secrets of the Northern Adriatic: "tegnue", peculiar reefs
No full textResearch carried out over the last 40 years has underlined the scientific importance of the rocky outcrops scattered on the Northern Adriatic Sea bed sometimes referred to as “tegnue”. The zoobenthic biocenoses developing over these peculiar geological formations are as extraordinary as they
are unique. A study carried out for an entire year in two sampling stations, at different distances from the coast, revealed a very high number of zoobenthic species, including those which have now become rare and are therefore protected in Italian seas. The water turbidity of the northern Adriatic Sea greatly
reduces the quantity of light reaching these outcrops, limiting the activity of autotrophic organisms only to sciaphilous genera. Thus, the most represented trophic categories of zoobenthos are suspension, especially filter feeders. Biodiversity values calculated for the communities of these particular reefs
are far higher than normally found in the soft seabed in nearby areas, but even higher than in other coralligenous outcrops in other marine ecosystem in the world. The ecological role played by the tegnue in the Northern Adriatic is extraordinary because as well as being true oases of biodiversity, they are areas naturally protected against bottom trawl-fishing. Thus, they offer shelter and reproduction sites for a number of fish and invertebrate species, including some under stress due to severe fishing pressure
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
Politica, progetto, piano. Livio Sichirollo e Giancarlo De Carlo a Urbino 1963-1990
No full textLa crisi della ragione politica novecentesca fa da sfondo alla parabola di una città e dei suoi ceti dirigenti e intellettuali. Il deperimento dello spazio pubblico a Urbino diventa così una metafora del venir meno della nozione stessa di democrazia moderna, intesa come progettazione, partecipazione e gestione organizzata e consapevole del conflitto.
Il primo Piano regolatore, ideato dal filosofo Livio Sichirollo e dall’architetto Giancarlo De Carlo, aveva saputo immaginare lo sviluppo complessivo della città, a partire dal rilancio dell’Università e delle funzioni culturali, a partire da un’idea universalistica di bene comune e interesse generale che esaltava il ruolo di ideazione e direzione delle istituzioni. L’incapacità politica di sostenere questa scelta di fronte all’esplodere degli interessi particolari in una società in rapido mutamento, segnerà però, non diversamente da quanto accaduto nel resto del Paese, la parabola involutiva del loro progetto. Il secondo Piano regolatore prenderà atto di questo fallimento: esso rinuncerà ad ogni pretesa di programmazione e si limiterà ad accompagnare lo sviluppo spontaneo delle forme e delle funzioni urbane.
Da qui, di fronte alla crisi di identità che ne è derivata, che rischia di fare di Urbino un non-luogo ma della quale le classi dirigenti locali sembrano non avere ancora nessuna percezione, la necessità di riscoprire le ragioni originarie del Piano e di dar vita a nuove politiche pubbliche che non siano improvvisate ma che si confrontino con una riflessione filosofica sull’avvenire della democrazia e sul senso della cittadinanza
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
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