1,721,002 research outputs found
Asphalt concrete with bottom ash: environmental aspects
No full textAs a consequence of the recent scientific
knowledge and industrial technologies the
use of some recycled materials in
construction applications is growing.
According to recent studies use of bottom
ash coming from Hospital and Municipal
Solid Waste Incinerator (HSWI, MSWI
bottom ash) is suitable as aggregate in
road construction in place of natural
stones.
The advantages connected to this
innovation are well known, but doubts
about environmental aspects haven’t been
absolutely solved yet.
The environmental impact of asphalt
concrete with bottom ash has been studied
carrying out leaching tests on laboratory
specimens according to the Italian law
(DM 5/02/1998). Results showed that
asphalt concrete containing waste material
has the same leachability of the traditional
mixes and the concentrations of pollutant
elements are within limits set by national
rule.
Nevertheless, a global evaluation of this
secondary materials for re-use andrecycling in asphalt concrete is based on
its life-cycle.
The critical phase is when the pavement
has to be stripped for pavement
maintenance operations. Reclaimed
Asphalt Pavement (RAP) is an unbound
and incoherent material; therefore each
aggregate grain is not completely covered
by bitumen and so leachability of pollutant
substances can be high. On the contrary
there are not environmental risks when
RAP is reused to produce hot or cold
asphalt concrete
In this paper, the authors present results of
leaching test performed on asphalt
concrete containing HSWI bottom ash.
This research confirmed use of bottom ash
coming from Hospital and Municipal
Solid Waste Incinerator as aggregate in
asphalt concrete is suitable and
environmentally safe. It is not necessary
any change in the construction and
maintenance operations at the end of its
working life
The survey of the dome of the basilica of St. Vitale in Ravenna
No full textLo studio presenta il risultato del rilievo 3d del sistema cupola, tiburio, tamburo della basilica di San Vitale a Ravenna
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
"Canopée des Halles de Paris": case study for an innovative digital approach to tender competition
No full text
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
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