1,721,062 research outputs found
Conformal prediction: A unified review of theory and new challenges
Full text linkIn this work we provide a review of basic ideas and novel developments about Conformal Prediction - an inno-vative distribution-free, non-parametric forecasting method, based on minimal assumptions - that is able to yield in a very straightforward way prediction sets that are valid in a statistical sense also in the finite sample case. The discussion provided in the paper covers the theoretical underpinnings of Conformal Prediction, and then proceeds to list the more advanced developments and adaptations of the original idea
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
GEOCITY: a drill-hole database as a tool to assess geological hazard in Napoli urban area.
No full textThe geological investigations of Napoli city, which represent the basic data source for geological hazard assessment, are characterized by the absence of well exposed and continuous outcrops, mainly due to the development of the urbanized area occurred in the last 50 years. In order to increase the set of available geological information, a database named GEOCITY has been realized on the base of 900 drill holes with stratigraphies reflecting the main drill-hole surveys performed during the last century. The true key moments in its construction were the homogenisation of different data and the identification of the geological formations. A detailed analysis of the drill-hole raw data allowed us to define the database entities, while the features of the deposits, the distribution of products and the reference drill holes were used to identify the geological formation. The analysis performed using the GEOCITY database made it possible to better assess volcanic hazard from Campi Flegrei and Somma-Vesuvio and the hazard related to alluvial phenomena that Napoli city is exposed to
L’utilizzo del monitoraggio satellitare e di superficie per la mitigazione del rischio derivante da sprofondamenti di origine naturale e antropica
No full textI fenomeni di sprofondamento rappresentano
i pericoli principali in aree carsiche, e risultano collegati alla
presenza di cavità naturali e antropiche. Al fine di mitigare i
rischi connessi agli sprofondamenti, l’identificazione di eventuali
segni premonitori che possano precedere la fase catastrofica
di collasso può risultare di estrema importanza. Il
monitoraggio da telerilevamento e di superficie può essere
utilizzato a tale fine: le tecniche di Interferometria Differenziale
con Radar ad Apertura Sintetica (DInSAR), in particolare,
forniscono un valido supporto per investigare in via
remota la suscettibilità da sprofondamenti a scala regionale.
In questo lavoro, l’approccio avanzato DInSAR noto
come Small BAseline Subset (SBAS) è utilizzato per identificare
e monitorare fenomeni di deformazioni del suolo nella Puglia
meridionale. In particolare, un dataset di immagini SAR ENVISAT
acquisite durante il periodo 2003-2010 è stato elaborato,
consentendo di cartografare aree attive di deformazione
superficiale, e di confrontare tali aree con l’effettiva occorrenza
di sprofondamenti, con particolare riferimento a recenti
eventi connessi a cave sotterranee
Discrimination between magmatic and hydrothermal nature of the sources responsible for the unrest phenomena at Yellowstone caldera via integrated model of InSAR time series, leveling and gravity measurements
No full textDispelling 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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