1,721,010 research outputs found
The Morgex avalanche - a comparative study
No full textOn February 23, 1999, in Morgex (Aosta, Italy) a large mixed avalanche was released from the basin of the Lavanchers torrent. Its powder part reached to the opposite side of the valley, caused whereas the dense part stopped at 975 m a.l.s. with a volume about 500.000 mc and a thickness close to 8 m. It was described by observers as a high cloud almost 500 m hight. One house, the phone and power lines and portions of wood (400000 mq ) were destroyed; a number of buildings were damaged and there was even one victim.
The paper presents a comparative estimation of the powder avalanche behaviour and of its impact pressure by means of three different numerical approaches:
• a back analysis based on the structural damage observed;
• a one-dimensional depth-averaged mixed flowing/powder snow avalanche model developed at SLF-Davos;
• a one-dimensional depth-averaged flowing snow avalanche model based on a Navier-Stokes modified equation developed by Studio Ceriani.
This paper demonstrates that two different snow avalanche simulators can give the same results about the avalanche run-out, flow velocity and the definition of the avalanche hazard cartography, in according with the data
and information obtained by the structural damage observe
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
Plasma Treatment and Ozonation of Binary Mixtures: The Case of Maleic and Fumaric Acids
Full text linkWith respect to ozonation, plasma treatment involves direct contact between the discharge
and the contaminated water therefore benefting, in addition to ozone, also of short-lived
reactive species. This paper focuses on mechanistic aspects of water treatment based on
plasma activation (in-situ discharge) and ozonation (ex-situ discharge), using maleic acid
and fumaric acid as model substrates and dielectric barrier discharges (DBDs) for producing plasma and ozone. Both types of experiments were carried out at diferent pH values and degradation profles of residual concentration vs treatment time were compared in
experiments in which each acid was treated individually and in mixture with the other. It
was found that, under all conditions examined, plasma treatment was more efcient than
ozonation for both acids, and that fumaric acid was always more reactive than maleic acid.
Peculiar S-shaped degradation curves were obtained for the decay of maleic acid when
treated in mixture with fumaric acid under acidic and neutral pH conditions in ozonation
and in plasma experiments. This efect was not observed when maleic acid was treated
in mixture with phenol instead of fumaric acid. The experimental data are nicely ftted
with a simple kinetic model which assumes that a single reactive species, in steady state
concentration, is responsible for the attack initiating the pollutants degradation. Based on
the complete set of results obtained the conclusion is reached that, in the DBD reactor
used, under acidic and neutral pH conditions ozone plays a major role in the degradation of
maleic and fumaric acids also in direct plasma treatment
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
Il violino di Gianmorte: Sui sonetti di Marco Ceriani (e in particolare su uno)
No full textIl presente articolo intende apportare un contributo, nel panorama della poesia cosiddetta ‘neometrica’, alla conoscenza di un caso piuttosto singolare: la sonettistica di Marco Ceriani. In particolare si prenderà in considerazione la raccolta Gianmorte violinista (2014) e la sezione di sonetti in essa contenuta, alla ricerca della formula dell’«eteroritmica» di Ceriani (espressione dell’autore). A questo scopo l’analisi si focalizzerà, in particolare, sul sonetto d’esordio della sezione, che verrà sottoposto a una close lecture integrale: partendo ovviamente da un’ipotesi sulle strutture metriche ivi impiegate. Si passerà poi a un’analisi semantica e, infine, ad alcune proposte ermeneutiche. Ma prima, si tenterà di delineare per sommi capi una ‘poetica’ dell’Autore considerato, prendendo le mosse soprattutto dalle poesie in esergo di Osip Mandel´štam (poeta d’elezione di Ceriani) e da una disamina critica sul concetto di ‘nonsense’.
English title: Gianmorte’s Violin: On the Sonnets of Marco Ceriani (and One in Particular)
English abstract: This article aims to contribute to the study of so-called neometric poetry by examining a particularly singular case: the sonnet writing of Marco Ceriani. Specifically, it will focus on the collection Gianmorte violinista (2014) and the section of sonnets it contains, in search of Ceriani’s formula of "eteroritmica" (a term coined by the author). To this end, the analysis will concentrate on the opening sonnet of the section, which will undergo a close reading, beginning with a hypothesis on the metrical structures employed. The study will then proceed to a semantic analysis and, finally, to some interpretative proposals. Before this, however, an attempt will be made to outline, in broad strokes, the poet’s poetics, drawing primarily from the epigraph poems by Osip Mandel´štam (Ceriani’s chosen poet) and a critical examination of the concept of nonsense
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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