1,720,966 research outputs found
Tavole di cubatura di popolamento per i soprassuoli forestali della Sicilia
No full textObiettivo del lavoro è la messa a punto di tavole di cubatura di popolamento per la stima statistica, in maniera rapida, facilmente applicabile e con adeguata attendibilità, delle masse legnose dei boschi ordinariamente governati a ceduo e a fustaia. Nella presente nota viene illustrata l’analisi statistica condotta per la preparazione dei modelli matematici di predizione del volume della massa legnosa a ettaro, vengono riportati i risultati ottenuti e sono discusse le modalità di applicazione dei modelli elaborati. L’impiego delle tavole di popolamento è indicato soprattutto nelle situazioni in cui sia possibile adottare procedure speditive per la determinazione dell’area basimetrica per unità di superficie: in particolare, l’ambito applicativo preferenziale è quello dei rilievi basati sulla stima relascopica dell’area basimetrica (prove relascopiche adiametriche) in corrispondenza di punti di sondaggio dislocati secondo uno schema di campionamento probabilistico
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
Sistemi di tariffe di cubatura per le fustaie di pino d'Aleppo, pino laricio e pino domestico della Sicilia
No full textThe aim of this study is to set up one-way volume table series to predict stem
volume of the main conifers in Sicily, namely Italian stone pine, Aleppo pine and
Corsican pine. For each species the relationships between height and tree diameter at
breast height (dbh) resulted well represented by the semilogarithmic function, which
was established as «guide line» of the height-diameter relationship. Adapting each
height - dbh series according to the inclination of the «guide line», a set of isomorphic
SISTEMI DI TARIFFE PER LE CONIFERE DELLA SICILIA 127
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height curves was obtained for each species. Corresponding volume series was obtained
from each height series on the basis of National Forestry Inventory volume tables. Oneway
volume table series are of considerable usefulness in the context of forest
management since they represent estimation tools with flexible application at different
levels of forest management
RESISTIVITY INDEX CHANGES ASSESSED WITH RENAL DOPPLER PREDICT DIURESIS IMPROVEMENT AFTER HEMODYNAMIC OPTIMIZATION.
No full textSimplified methods for spatial sampling: application to first-phase data of Italian National Forest Inventory (INFC) in Sicily
Full text linkMethodological approaches able to integrate data from sample plots with cartographic processes are widely applied. Based on mathematic-statistical techniques, the spatial analysis allows the exploration and spatialization of geographic data. Starting from the punctual information on land use types obtained from the dataset of the first phase of the ongoing new Italian NFI (INFC), a spatialization of land cover classes was carried out using the Inverse Distance Weighting (IDW) method. In order to validate the obtained results, an overlay with other vectorial land use data was carried out. In particular, the overlay compared data at different scales, evaluating differences in terms of degree of correspondence between the interpolated and reference land cover
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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