1,720,960 research outputs found
Cartografia idrogeologica sperimentale nel settore sud-orientale dei Monti Cimini (Lazio)
No full textIl presente studio è stato realizzato nell’ambito di una convenzione stipulata tra il Dipartimento per i Servizi Tecnici Nazionali-Servizio Geologico Nazionale della Presidenza del Consiglio dei Ministri (già APAT, Servizio Geologico d’Italia/Dipartimento Difesa del Suolo) ora ISPRA e l’Università degli Studi “Roma Tre”, Dipartimento di Scienze Geologiche. Tale convenzione prevedeva la sperimentazione delle linee guida per la realizzazione della Carta Idrogeologica d’Italia alla scala 1:50.000, in un’area campione individuata nell’ambito di uno dei distretti vulcanici dell’Italia centrale: il settore sudorientale dei Monti Cimini. Durante lo studio idrogeologico eseguito in tale area sono stati recuperati dati geologici ed idrogeologici inediti e di letteratura ed è stata realizzata, in quattro fasi stagionali negli anni 2002-2003, un’attività di campagna finalizzata al monitoraggio dei punti d’acqua (sorgenti e pozzi), e in particolare alla realizzazione di misure di portata in alveo per individuare i rapporti falda-fiume. I dati raccolti, inoltre, sono stati utilizzati per uno studio di geologia stratigrafica e strutturale che ha portato alla redazione di profili idrogeologici che, unitamente all’analisi degli elementi caratteristici del bilancio idrologico del bacino del Fiume Treia, principale corso d’acqua nell’area in esame, hanno permesso la ricostruzione di un modello di circolazione idrica sotterranea. Per ogni tematismo geologico ed idrogeologico sono stati realizzati opportuni strati informativi interfacciati con un database appositamente realizzato. Il prodotto finale è stato la realizzazione di una carta idrogeologica alla scala 1:50.000 che, oltre ad individuare le caratteristiche idrogeologiche dell’area ha permesso di poter sperimentare l’applicabilità delle linee guida.This study was realized within a collaboration agreement between the “Dipartimento per i Servizi Tecnici Nazionali-Servizio Geologico Nazionale della Presidenza del Consiglio dei Ministri” (now “ISPRA, Servizio Geologico d’Italia/Dipartimento Difesa del Suolo”) and “Università degli Studi “Roma Tre”, Dipartimento di Scienze Geologiche”, aimed to the testing of the Italian guidelines for the hydrogeological survey and mapping at the 1:50,000 scale in the south-eastern sector of the volcanic district of the Monti Cimini, in central Italy. The study has concerned the collection of geologic and hydrogeologic information from the scientific literature, the realization of a hydrogeologic field survey (four seasonal field investigations in a year during 2002-2003) consisting in well and spring monitoring and in stream gauging measurement finalized to the definition of the groundwater-surface water relationships. The collected data were also used for a stratigraphic and structural geology study aimed to the elaboration of hydrogeologic sections that, along with the discussion of the elements characterizing the hydrologic balance of the Treia River Basin, representing the main stream in the study area, have allowed the reconstruction of the local groundwater flow field. The geologic and hydrogeologic information has been organized in different informative layers interfaced with a specific suitable database. The hydrogeologic map on purpose realized at the scale 1:50,000 reports the main hydrogeologic features of the study area and the results of the testing of the cartographic guidelines
Cartografia Idrogeologica sperimentale nel settore sud-orientale dei Monti Cimini (Lazio)
No full textThis study was realized within a collaboration
agreement between the “Dipartimento per i Servizi Tecnici
Nazionali-Servizio Geologico Nazionale della Presidenza del
Consiglio dei Ministri” (now “ISPRA, Servizio Geologico
d’Italia/Dipartimento Difesa del Suolo”) and “Università
degli Studi “Roma Tre”, Dipartimento di Scienze Geologiche”,
aimed to the testing of the Italian guidelines for the
hydrogeological survey and mapping at the 1:50,000 scale in
the south-eastern sector of the volcanic district of the Monti
Cimini, in central Italy.
The study has concerned the collection of geologic and
hydrogeologic information from the scientific literature, the
realization of a hydrogeologic field survey (four seasonal field
investigations in a year during 2002-2003) consisting in well
and spring monitoring and in stream gauging measurement
finalized to the definition of the groundwater-surface water
relationships.
The collected data were also used for a stratigraphic and
structural geology study aimed to the elaboration of
hydrogeologic sections that, along with the discussion of the
elements characterizing the hydrologic balance of the Treia
River Basin, representing the main stream in the study area,
have allowed the reconstruction of the local groundwater
flow field.
The geologic and hydrogeologic information has been
organized in different informative layers interfaced with a
specific suitable database.
The hydrogeologic map on purpose realized at the scale
1:50,000 reports the main hydrogeologic features of the study
area and the results of the testing of the cartographic
guideline
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
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