1,721,054 research outputs found
La dimostrazione degli antifermentativi nelle bevande on il metode+o microbiologico. Nota 2. Esperienze con il sqggio di Kluyver-Mosel
No full textSrà inserito in seguito a biblioteche apert
I MARMI DI CARRARA: INTRODUZIONE GEOLOGICA E CARATTERISTICHE GIACIMENTOLOGICHE
No full textI MARMI DI CARRARA: INTRODUZIONE GEOLOGICA
E CARATTERISTICHE GIACIMENTOLOGICH
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
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
Il rischio geomorfologico indotto dall’attività estrattiva nei bacini marmiferi apuani (Alpi Apuane, Toscana)
No full textThe new quarrying techniques and the reject stone recovery
system induce new geomorphological hazard scenarios in the
Carrara Marble Basin. This work analyses the recent landsli
des and debris flows occurred in the Marble Basins, stressing
their relationships with the quarrying activity.
In the open space quarries, the progressive lowering of the
working base level determines the formation of steep and
high (more than 100 m) slopes carved in densely fractured
rocks. In correspondence of these cliffs, several landslides
occurred in the last years, in some cases mobilizing more than
30,000 m3 of rock. The triggering causes were the rainfall
hourly intensity (even 60 mmllh) and the antecedent rainfal
is (up to 80 mm in the 34 antecedent hours). The main land
slides kinematic analysis highlighted that they are a structu
ral collapse of high rocky bench, with rupture phenomena at
the base, differential slides and local toppling.
As regard the quarry dump deposits (locally called ravaneti),
the temporal evolution of quarrying techniques determined
the overlapping along the slopes of two layers with different
granulometric and permeability characteristics. The deepest
layer, with multi-decimetres blocks and scarce fine matrix,
corresponds to the typical ravaneto of the 1t29h0 centuries
crossing period. The active surface ravaneto, with decimetres
blocks and abundant fine matrix, is the consequence of the
new diamond wire cutting methods, introduced in the ‘70s.
Nowadays, fine material is added to the ravaneti also by the
reject stones sieving, in order to produce C3.aCO
In the last years, several debris flows affected the ravaneti.
The rainfall recording analysis shows a relative low threshold
for debris flows triggering, with events occurred with 60
mmJ5 h of rainfall and with a maximum intensity of only 14
mm/i h. The mobilization occurs by means of initial soil slip
that, with a progressive fluidification, becomes a debris flow.
The increased frequency of the events in the last years can be
referred to fine material added to the ravaneti that forced the
saturation processes.
In the Carrara Marble Basins, the highest geomorphological
hazards for the workers and the infrastructures are represen
ted by the abandoned sub-vertical and densely fractured slo
pes, and the increased concentration of fine fractions in the
ravaneti, induced by the new quarrying techniques and the
reject stone recovery
An extensive range grain-size analyses in the source areas of the Carrara marble basins debris flows (Apuane Alps, Italy)”
No full text- …
